5 Changes between 1.0.2e and 1.1.0 [xx XXX xxxx]
7 *) Add support for setting the minimum and maximum supported protocol.
8 It can bet set via the SSL_set_min_proto_version() and
9 SSL_set_max_proto_version(), or via the SSL_CONF's MinProtocol and
10 MaxProtcol. It's recommended to use the new APIs to disable
11 protocols instead of disabling individual protocols using
12 SSL_set_options() or SSL_CONF's Protocol. This change also
13 removes support for disabling TLS 1.2 in the OpenSSL TLS
14 client at compile time by defining OPENSSL_NO_TLS1_2_CLIENT.
17 *) Support for ChaCha20 and Poly1305 added to libcrypto and libssl.
20 *) New EC_KEY_METHOD, this replaces the older ECDSA_METHOD and ECDH_METHOD
21 and integrates ECDSA and ECDH functionality into EC. Implementations can
22 now redirect key generation and no longer need to convert to or from
25 Note: the ecdsa.h and ecdh.h headers are now no longer needed and just
26 include the ec.h header file instead.
29 *) Remove support for all 40 and 56 bit ciphers. This includes all the export
30 ciphers who are no longer supported and drops support the ephemeral RSA key
31 exchange. The LOW ciphers currently doesn't have any ciphers in it.
34 *) Make EVP_MD_CTX, EVP_MD and HMAC_CTX opaque. For HMAC_CTX, the
35 following constructors and destructors were added:
37 HMAC_CTX *HMAC_CTX_new(void);
38 void HMAC_CTX_free(HMAC_CTX *ctx);
40 For EVP_MD, a complete API to create, fill and destroy such
41 methods has been added. See EVP_MD_meth_new(3) for
45 1) HMAC_CTX_cleanup() and EVP_MD_CTX_cleanup() were removed,
46 HMAC_CTX_init() and EVP_MD_CTX_init() should be called instead
47 to reinitialise and already created structure. Also,
48 HMAC_CTX_init() and EVP_MD_CTX_init() now return 0 for failure
49 and 1 for success (they previously had the return type void).
50 2) For consistency with the majority of our object creators and
51 destructors, EVP_MD_CTX_(create|destroy) were renamed to
52 EVP_MD_CTX_(new|free). The old names are retained as macros
53 for deprecated builds.
56 *) Added ASYNC support. Libcrypto now includes the async sub-library to enable
57 cryptographic operations to be performed asynchronously as long as an
58 asynchronous capable engine is used. See the ASYNC_start_job() man page for
59 further details. Libssl has also had this capability integrated with the
60 introduction of the new mode SSL_MODE_ASYNC and associated error
61 SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man
62 pages. This work was developed in partnership with Intel Corp.
65 *) SSL_{CTX_}set_ecdh_auto() has been removed and ECDH is support is
66 always enabled now. If you want to disable the support you should
67 exclude it using the list of supported ciphers. This also means that the
68 "-no_ecdhe" option has been removed from s_server.
71 *) SSL_{CTX}_set_tmp_ecdh() which can set 1 EC curve now internally calls
72 SSL_{CTX_}set1_curves() which can set a list.
75 *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the
76 curve you want to support using SSL_{CTX_}set1_curves().
79 *) State machine rewrite. The state machine code has been significantly
80 refactored in order to remove much duplication of code and solve issues
81 with the old code (see ssl/statem/README for further details). This change
82 does have some associated API changes. Notably the SSL_state() function
83 has been removed and replaced by SSL_get_state which now returns an
84 "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed
85 altogether. The previous handshake states defined in ssl.h and ssl3.h have
89 *) All instances of the string "ssleay" in the public API were replaced
90 with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's)
91 Some error codes related to internal RSA_eay API's were renamed.
94 *) The demo files in crypto/threads were moved to demo/threads.
97 *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron, gmp,
99 [Matt Caswell, Rich Salz]
101 *) New ASN.1 embed macro.
103 New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the
104 structure is not allocated: it is part of the parent. That is instead of
112 This reduces memory fragmentation and make it impossible to accidentally
113 set a mandatory field to NULL.
115 This currently only works for some fields specifically a SEQUENCE, CHOICE,
116 or ASN1_STRING type which is part of a parent SEQUENCE. Since it is
117 equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or
121 *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled.
124 *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although
125 in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also
126 an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add
127 DES and RC4 ciphersuites.
130 *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs.
131 This changes the decoding behaviour for some invalid messages,
132 though the change is mostly in the more lenient direction, and
133 legacy behaviour is preserved as much as possible.
136 *) Fix no-stdio build.
137 [ David Woodhouse <David.Woodhouse@intel.com> and also
138 Ivan Nestlerode <ivan.nestlerode@sonos.com> ]
140 *) New testing framework
141 The testing framework has been largely rewritten and is now using
142 perl and the perl modules Test::Harness and an extended variant of
143 Test::More called OpenSSL::Test to do its work. All test scripts in
144 test/ have been rewritten into test recipes, and all direct calls to
145 executables in test/Makefile have become individual recipes using the
146 simplified testing OpenSSL::Test::Simple.
148 For documentation on our testing modules, do:
150 perldoc test/testlib/OpenSSL/Test/Simple.pm
151 perldoc test/testlib/OpenSSL/Test.pm
155 *) Revamped memory debug; only -DCRYPTO_MDEBUG and -DCRYPTO_MDEBUG_ABORT
156 are used; the latter aborts on memory leaks (usually checked on exit).
157 Some undocumented "set malloc, etc., hooks" functions were removed
158 and others were changed. All are now documented.
161 *) In DSA_generate_parameters_ex, if the provided seed is too short,
163 [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>]
165 *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites
166 from RFC4279, RFC4785, RFC5487, RFC5489.
168 Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the
169 original RSA_PSK patch.
172 *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay
173 era flag was never set throughout the codebase (only read). Also removed
174 SSL3_FLAGS_POP_BUFFER which was only used if
175 SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set.
178 *) Changed the default name options in the "ca", "crl", "req" and "x509"
179 to be "oneline" instead of "compat".
182 *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're
183 not aware of clients that still exhibit this bug, and the workaround
184 hasn't been working properly for a while.
187 *) The return type of BIO_number_read() and BIO_number_written() as well as
188 the corresponding num_read and num_write members in the BIO structure has
189 changed from unsigned long to uint64_t. On platforms where an unsigned
190 long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is
194 *) Given the pervasive nature of TLS extensions it is inadvisable to run
195 OpenSSL without support for them. It also means that maintaining
196 the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably
197 not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed.
200 *) Removed support for the two export grade static DH ciphersuites
201 EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites
202 were newly added (along with a number of other static DH ciphersuites) to
203 1.0.2. However the two export ones have *never* worked since they were
204 introduced. It seems strange in any case to be adding new export
205 ciphersuites, and given "logjam" it also does not seem correct to fix them.
208 *) Version negotiation has been rewritten. In particular SSLv23_method(),
209 SSLv23_client_method() and SSLv23_server_method() have been deprecated,
210 and turned into macros which simply call the new preferred function names
211 TLS_method(), TLS_client_method() and TLS_server_method(). All new code
212 should use the new names instead. Also as part of this change the ssl23.h
213 header file has been removed.
216 *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This
217 code and the associated standard is no longer considered fit-for-purpose.
220 *) RT2547 was closed. When generating a private key, try to make the
221 output file readable only by the owner. This behavior change might
222 be noticeable when interacting with other software.
224 *) Documented all exdata functions. Added CRYPTO_free_ex_index.
228 *) Added HTTP GET support to the ocsp command.
231 *) Changed default digest for the dgst and enc commands from MD5 to
235 *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead.
238 *) Added support for TLS extended master secret from
239 draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an
240 initial patch which was a great help during development.
243 *) All libssl internal structures have been removed from the public header
244 files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is
245 now redundant). Users should not attempt to access internal structures
246 directly. Instead they should use the provided API functions.
249 *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used.
250 Access to deprecated functions can be re-enabled by running config with
251 "enable-deprecated". In addition applications wishing to use deprecated
252 functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour
253 will, by default, disable some transitive includes that previously existed
254 in the header files (e.g. ec.h will no longer, by default, include bn.h)
257 *) Added support for OCB mode. OpenSSL has been granted a patent license
258 compatible with the OpenSSL license for use of OCB. Details are available
259 at https://www.openssl.org/source/OCB-patent-grant-OpenSSL.pdf. Support
260 for OCB can be removed by calling config with no-ocb.
263 *) SSLv2 support has been removed. It still supports receiving a SSLv2
264 compatible client hello.
267 *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz],
268 done while fixing the error code for the key-too-small case.
269 [Annie Yousar <a.yousar@informatik.hu-berlin.de>]
271 *) CA.sh has been removmed; use CA.pl instead.
274 *) Removed old DES API.
277 *) Remove various unsupported platforms:
283 Sinix/ReliantUNIX RM400
288 16-bit platforms such as WIN16
291 *) Clean up OPENSSL_NO_xxx #define's
292 Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF
293 Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx
294 OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC
295 OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160
296 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO
297 Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY
298 OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP
299 OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK
300 OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY
301 Remove MS_STATIC; it's a relic from platforms <32 bits.
304 *) Cleaned up dead code
305 Remove all but one '#ifdef undef' which is to be looked at.
308 *) Clean up calling of xxx_free routines.
309 Just like free(), fix most of the xxx_free routines to accept
310 NULL. Remove the non-null checks from callers. Save much code.
313 *) Add secure heap for storage of private keys (when possible).
314 Add BIO_s_secmem(), CBIGNUM, etc.
315 Contributed by Akamai Technologies under our Corporate CLA.
318 *) Experimental support for a new, fast, unbiased prime candidate generator,
319 bn_probable_prime_dh_coprime(). Not currently used by any prime generator.
320 [Felix Laurie von Massenbach <felix@erbridge.co.uk>]
322 *) New output format NSS in the sess_id command line tool. This allows
323 exporting the session id and the master key in NSS keylog format.
324 [Martin Kaiser <martin@kaiser.cx>]
326 *) Harmonize version and its documentation. -f flag is used to display
328 [mancha <mancha1@zoho.com>]
330 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
331 in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue.
332 [mancha <mancha1@zoho.com>]
334 *) Fix some double frees. These are not thought to be exploitable.
335 [mancha <mancha1@zoho.com>]
337 *) A missing bounds check in the handling of the TLS heartbeat extension
338 can be used to reveal up to 64k of memory to a connected client or
341 Thanks for Neel Mehta of Google Security for discovering this bug and to
342 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
343 preparing the fix (CVE-2014-0160)
344 [Adam Langley, Bodo Moeller]
346 *) Fix for the attack described in the paper "Recovering OpenSSL
347 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
348 by Yuval Yarom and Naomi Benger. Details can be obtained from:
349 http://eprint.iacr.org/2014/140
351 Thanks to Yuval Yarom and Naomi Benger for discovering this
352 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
353 [Yuval Yarom and Naomi Benger]
355 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
356 this fixes a limitation in previous versions of OpenSSL.
359 *) Experimental encrypt-then-mac support.
361 Experimental support for encrypt then mac from
362 draft-gutmann-tls-encrypt-then-mac-02.txt
364 To enable it set the appropriate extension number (0x42 for the test
365 server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42
367 For non-compliant peers (i.e. just about everything) this should have no
370 WARNING: EXPERIMENTAL, SUBJECT TO CHANGE.
374 *) Add EVP support for key wrapping algorithms, to avoid problems with
375 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
376 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
377 algorithms and include tests cases.
380 *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for
384 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
385 MGF1 digest and OAEP label.
388 *) Make openssl verify return errors.
389 [Chris Palmer <palmer@google.com> and Ben Laurie]
391 *) New function ASN1_TIME_diff to calculate the difference between two
392 ASN1_TIME structures or one structure and the current time.
395 *) Update fips_test_suite to support multiple command line options. New
396 test to induce all self test errors in sequence and check expected
400 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
401 sign or verify all in one operation.
404 *) Add fips_algvs: a multicall fips utility incorporating all the algorithm
405 test programs and fips_test_suite. Includes functionality to parse
406 the minimal script output of fipsalgest.pl directly.
409 *) Add authorisation parameter to FIPS_module_mode_set().
412 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
415 *) Use separate DRBG fields for internal and external flags. New function
416 FIPS_drbg_health_check() to perform on demand health checking. Add
417 generation tests to fips_test_suite with reduced health check interval to
418 demonstrate periodic health checking. Add "nodh" option to
419 fips_test_suite to skip very slow DH test.
422 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
426 *) More extensive health check for DRBG checking many more failure modes.
427 New function FIPS_selftest_drbg_all() to handle every possible DRBG
428 combination: call this in fips_test_suite.
431 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
432 and POST to handle Dual EC cases.
435 *) Add support for canonical generation of DSA parameter 'g'. See
438 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
439 POST to handle HMAC cases.
442 *) Add functions FIPS_module_version() and FIPS_module_version_text()
443 to return numerical and string versions of the FIPS module number.
446 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
447 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented
448 outside the validated module in the FIPS capable OpenSSL.
451 *) Minor change to DRBG entropy callback semantics. In some cases
452 there is no multiple of the block length between min_len and
453 max_len. Allow the callback to return more than max_len bytes
454 of entropy but discard any extra: it is the callback's responsibility
455 to ensure that the extra data discarded does not impact the
456 requested amount of entropy.
459 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
460 information in FIPS186-3, SP800-57 and SP800-131A.
463 *) CCM support via EVP. Interface is very similar to GCM case except we
464 must supply all data in one chunk (i.e. no update, final) and the
465 message length must be supplied if AAD is used. Add algorithm test
469 *) Initial version of POST overhaul. Add POST callback to allow the status
470 of POST to be monitored and/or failures induced. Modify fips_test_suite
471 to use callback. Always run all selftests even if one fails.
474 *) XTS support including algorithm test driver in the fips_gcmtest program.
475 Note: this does increase the maximum key length from 32 to 64 bytes but
476 there should be no binary compatibility issues as existing applications
477 will never use XTS mode.
480 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
481 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
482 performs algorithm blocking for unapproved PRNG types. Also do not
483 set PRNG type in FIPS_mode_set(): leave this to the application.
484 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
485 the standard OpenSSL PRNG: set additional data to a date time vector.
488 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
489 This shouldn't present any incompatibility problems because applications
490 shouldn't be using these directly and any that are will need to rethink
491 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
494 *) Extensive self tests and health checking required by SP800-90 DRBG.
495 Remove strength parameter from FIPS_drbg_instantiate and always
496 instantiate at maximum supported strength.
499 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
502 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
505 *) New function DH_compute_key_padded() to compute a DH key and pad with
506 leading zeroes if needed: this complies with SP800-56A et al.
509 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
510 anything, incomplete, subject to change and largely untested at present.
513 *) Modify fipscanisteronly build option to only build the necessary object
514 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
517 *) Add experimental option FIPSSYMS to give all symbols in
518 fipscanister.o and FIPS or fips prefix. This will avoid
519 conflicts with future versions of OpenSSL. Add perl script
520 util/fipsas.pl to preprocess assembly language source files
521 and rename any affected symbols.
524 *) Add selftest checks and algorithm block of non-fips algorithms in
525 FIPS mode. Remove DES2 from selftests.
528 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
529 return internal method without any ENGINE dependencies. Add new
530 tiny fips sign and verify functions.
533 *) New build option no-ec2m to disable characteristic 2 code.
536 *) New build option "fipscanisteronly". This only builds fipscanister.o
537 and (currently) associated fips utilities. Uses the file Makefile.fips
538 instead of Makefile.org as the prototype.
541 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
542 Update fips_gcmtest to use IV generator.
545 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
546 setting output buffer to NULL. The *Final function must be
547 called although it will not retrieve any additional data. The tag
548 can be set or retrieved with a ctrl. The IV length is by default 12
549 bytes (96 bits) but can be set to an alternative value. If the IV
550 length exceeds the maximum IV length (currently 16 bytes) it cannot be
554 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
555 underlying do_cipher function handles all cipher semantics itself
556 including padding and finalisation. This is useful if (for example)
557 an ENGINE cipher handles block padding itself. The behaviour of
558 do_cipher is subtly changed if this flag is set: the return value
559 is the number of characters written to the output buffer (zero is
560 no longer an error code) or a negative error code. Also if the
561 input buffer is NULL and length 0 finalisation should be performed.
564 *) If a candidate issuer certificate is already part of the constructed
565 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
568 *) Improve forward-security support: add functions
570 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
571 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
573 for use by SSL/TLS servers; the callback function will be called whenever a
574 new session is created, and gets to decide whether the session may be
575 cached to make it resumable (return 0) or not (return 1). (As by the
576 SSL/TLS protocol specifications, the session_id sent by the server will be
577 empty to indicate that the session is not resumable; also, the server will
578 not generate RFC 4507 (RFC 5077) session tickets.)
580 A simple reasonable callback implementation is to return is_forward_secure.
581 This parameter will be set to 1 or 0 depending on the ciphersuite selected
582 by the SSL/TLS server library, indicating whether it can provide forward
584 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
586 *) New -verify_name option in command line utilities to set verification
590 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
591 Add CMAC pkey methods.
594 *) Experimental renegotiation in s_server -www mode. If the client
595 browses /reneg connection is renegotiated. If /renegcert it is
596 renegotiated requesting a certificate.
599 *) Add an "external" session cache for debugging purposes to s_server. This
600 should help trace issues which normally are only apparent in deployed
601 multi-process servers.
604 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
605 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
606 BIO_set_cipher() and some obscure PEM functions were changed so they
607 can now return an error. The RAND changes required a change to the
608 RAND_METHOD structure.
611 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
612 a gcc attribute to warn if the result of a function is ignored. This
613 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
614 whose return value is often ignored.
617 Changes between 1.0.2d and 1.0.2e [3 Dec 2015]
619 *) BN_mod_exp may produce incorrect results on x86_64
621 There is a carry propagating bug in the x86_64 Montgomery squaring
622 procedure. No EC algorithms are affected. Analysis suggests that attacks
623 against RSA and DSA as a result of this defect would be very difficult to
624 perform and are not believed likely. Attacks against DH are considered just
625 feasible (although very difficult) because most of the work necessary to
626 deduce information about a private key may be performed offline. The amount
627 of resources required for such an attack would be very significant and
628 likely only accessible to a limited number of attackers. An attacker would
629 additionally need online access to an unpatched system using the target
630 private key in a scenario with persistent DH parameters and a private
631 key that is shared between multiple clients. For example this can occur by
632 default in OpenSSL DHE based SSL/TLS ciphersuites.
634 This issue was reported to OpenSSL by Hanno Böck.
638 *) Certificate verify crash with missing PSS parameter
640 The signature verification routines will crash with a NULL pointer
641 dereference if presented with an ASN.1 signature using the RSA PSS
642 algorithm and absent mask generation function parameter. Since these
643 routines are used to verify certificate signature algorithms this can be
644 used to crash any certificate verification operation and exploited in a
645 DoS attack. Any application which performs certificate verification is
646 vulnerable including OpenSSL clients and servers which enable client
649 This issue was reported to OpenSSL by Loïc Jonas Etienne (Qnective AG).
653 *) X509_ATTRIBUTE memory leak
655 When presented with a malformed X509_ATTRIBUTE structure OpenSSL will leak
656 memory. This structure is used by the PKCS#7 and CMS routines so any
657 application which reads PKCS#7 or CMS data from untrusted sources is
658 affected. SSL/TLS is not affected.
660 This issue was reported to OpenSSL by Adam Langley (Google/BoringSSL) using
665 *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs.
666 This changes the decoding behaviour for some invalid messages,
667 though the change is mostly in the more lenient direction, and
668 legacy behaviour is preserved as much as possible.
671 *) In DSA_generate_parameters_ex, if the provided seed is too short,
673 [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>]
675 Changes between 1.0.2c and 1.0.2d [9 Jul 2015]
677 *) Alternate chains certificate forgery
679 During certificate verfification, OpenSSL will attempt to find an
680 alternative certificate chain if the first attempt to build such a chain
681 fails. An error in the implementation of this logic can mean that an
682 attacker could cause certain checks on untrusted certificates to be
683 bypassed, such as the CA flag, enabling them to use a valid leaf
684 certificate to act as a CA and "issue" an invalid certificate.
686 This issue was reported to OpenSSL by Adam Langley/David Benjamin
690 Changes between 1.0.2b and 1.0.2c [12 Jun 2015]
692 *) Fix HMAC ABI incompatibility. The previous version introduced an ABI
693 incompatibility in the handling of HMAC. The previous ABI has now been
697 Changes between 1.0.2a and 1.0.2b [11 Jun 2015]
699 *) Malformed ECParameters causes infinite loop
701 When processing an ECParameters structure OpenSSL enters an infinite loop
702 if the curve specified is over a specially malformed binary polynomial
705 This can be used to perform denial of service against any
706 system which processes public keys, certificate requests or
707 certificates. This includes TLS clients and TLS servers with
708 client authentication enabled.
710 This issue was reported to OpenSSL by Joseph Barr-Pixton.
714 *) Exploitable out-of-bounds read in X509_cmp_time
716 X509_cmp_time does not properly check the length of the ASN1_TIME
717 string and can read a few bytes out of bounds. In addition,
718 X509_cmp_time accepts an arbitrary number of fractional seconds in the
721 An attacker can use this to craft malformed certificates and CRLs of
722 various sizes and potentially cause a segmentation fault, resulting in
723 a DoS on applications that verify certificates or CRLs. TLS clients
724 that verify CRLs are affected. TLS clients and servers with client
725 authentication enabled may be affected if they use custom verification
728 This issue was reported to OpenSSL by Robert Swiecki (Google), and
729 independently by Hanno Böck.
733 *) PKCS7 crash with missing EnvelopedContent
735 The PKCS#7 parsing code does not handle missing inner EncryptedContent
736 correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs
737 with missing content and trigger a NULL pointer dereference on parsing.
739 Applications that decrypt PKCS#7 data or otherwise parse PKCS#7
740 structures from untrusted sources are affected. OpenSSL clients and
741 servers are not affected.
743 This issue was reported to OpenSSL by Michal Zalewski (Google).
747 *) CMS verify infinite loop with unknown hash function
749 When verifying a signedData message the CMS code can enter an infinite loop
750 if presented with an unknown hash function OID. This can be used to perform
751 denial of service against any system which verifies signedData messages using
753 This issue was reported to OpenSSL by Johannes Bauer.
757 *) Race condition handling NewSessionTicket
759 If a NewSessionTicket is received by a multi-threaded client when attempting to
760 reuse a previous ticket then a race condition can occur potentially leading to
761 a double free of the ticket data.
765 *) Only support 256-bit or stronger elliptic curves with the
766 'ecdh_auto' setting (server) or by default (client). Of supported
767 curves, prefer P-256 (both).
770 Changes between 1.0.2 and 1.0.2a [19 Mar 2015]
772 *) ClientHello sigalgs DoS fix
774 If a client connects to an OpenSSL 1.0.2 server and renegotiates with an
775 invalid signature algorithms extension a NULL pointer dereference will
776 occur. This can be exploited in a DoS attack against the server.
778 This issue was was reported to OpenSSL by David Ramos of Stanford
781 [Stephen Henson and Matt Caswell]
783 *) Multiblock corrupted pointer fix
785 OpenSSL 1.0.2 introduced the "multiblock" performance improvement. This
786 feature only applies on 64 bit x86 architecture platforms that support AES
787 NI instructions. A defect in the implementation of "multiblock" can cause
788 OpenSSL's internal write buffer to become incorrectly set to NULL when
789 using non-blocking IO. Typically, when the user application is using a
790 socket BIO for writing, this will only result in a failed connection.
791 However if some other BIO is used then it is likely that a segmentation
792 fault will be triggered, thus enabling a potential DoS attack.
794 This issue was reported to OpenSSL by Daniel Danner and Rainer Mueller.
798 *) Segmentation fault in DTLSv1_listen fix
800 The DTLSv1_listen function is intended to be stateless and processes the
801 initial ClientHello from many peers. It is common for user code to loop
802 over the call to DTLSv1_listen until a valid ClientHello is received with
803 an associated cookie. A defect in the implementation of DTLSv1_listen means
804 that state is preserved in the SSL object from one invocation to the next
805 that can lead to a segmentation fault. Errors processing the initial
806 ClientHello can trigger this scenario. An example of such an error could be
807 that a DTLS1.0 only client is attempting to connect to a DTLS1.2 only
810 This issue was reported to OpenSSL by Per Allansson.
814 *) Segmentation fault in ASN1_TYPE_cmp fix
816 The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is
817 made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check
818 certificate signature algorithm consistency this can be used to crash any
819 certificate verification operation and exploited in a DoS attack. Any
820 application which performs certificate verification is vulnerable including
821 OpenSSL clients and servers which enable client authentication.
825 *) Segmentation fault for invalid PSS parameters fix
827 The signature verification routines will crash with a NULL pointer
828 dereference if presented with an ASN.1 signature using the RSA PSS
829 algorithm and invalid parameters. Since these routines are used to verify
830 certificate signature algorithms this can be used to crash any
831 certificate verification operation and exploited in a DoS attack. Any
832 application which performs certificate verification is vulnerable including
833 OpenSSL clients and servers which enable client authentication.
835 This issue was was reported to OpenSSL by Brian Carpenter.
839 *) ASN.1 structure reuse memory corruption fix
841 Reusing a structure in ASN.1 parsing may allow an attacker to cause
842 memory corruption via an invalid write. Such reuse is and has been
843 strongly discouraged and is believed to be rare.
845 Applications that parse structures containing CHOICE or ANY DEFINED BY
846 components may be affected. Certificate parsing (d2i_X509 and related
847 functions) are however not affected. OpenSSL clients and servers are
852 *) PKCS7 NULL pointer dereferences fix
854 The PKCS#7 parsing code does not handle missing outer ContentInfo
855 correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with
856 missing content and trigger a NULL pointer dereference on parsing.
858 Applications that verify PKCS#7 signatures, decrypt PKCS#7 data or
859 otherwise parse PKCS#7 structures from untrusted sources are
860 affected. OpenSSL clients and servers are not affected.
862 This issue was reported to OpenSSL by Michal Zalewski (Google).
866 *) DoS via reachable assert in SSLv2 servers fix
868 A malicious client can trigger an OPENSSL_assert (i.e., an abort) in
869 servers that both support SSLv2 and enable export cipher suites by sending
870 a specially crafted SSLv2 CLIENT-MASTER-KEY message.
872 This issue was discovered by Sean Burford (Google) and Emilia Käsper
873 (OpenSSL development team).
877 *) Empty CKE with client auth and DHE fix
879 If client auth is used then a server can seg fault in the event of a DHE
880 ciphersuite being selected and a zero length ClientKeyExchange message
881 being sent by the client. This could be exploited in a DoS attack.
885 *) Handshake with unseeded PRNG fix
887 Under certain conditions an OpenSSL 1.0.2 client can complete a handshake
888 with an unseeded PRNG. The conditions are:
889 - The client is on a platform where the PRNG has not been seeded
890 automatically, and the user has not seeded manually
891 - A protocol specific client method version has been used (i.e. not
892 SSL_client_methodv23)
893 - A ciphersuite is used that does not require additional random data from
894 the PRNG beyond the initial ClientHello client random (e.g. PSK-RC4-SHA).
896 If the handshake succeeds then the client random that has been used will
897 have been generated from a PRNG with insufficient entropy and therefore the
898 output may be predictable.
900 For example using the following command with an unseeded openssl will
901 succeed on an unpatched platform:
903 openssl s_client -psk 1a2b3c4d -tls1_2 -cipher PSK-RC4-SHA
907 *) Use After Free following d2i_ECPrivatekey error fix
909 A malformed EC private key file consumed via the d2i_ECPrivateKey function
910 could cause a use after free condition. This, in turn, could cause a double
911 free in several private key parsing functions (such as d2i_PrivateKey
912 or EVP_PKCS82PKEY) and could lead to a DoS attack or memory corruption
913 for applications that receive EC private keys from untrusted
914 sources. This scenario is considered rare.
916 This issue was discovered by the BoringSSL project and fixed in their
921 *) X509_to_X509_REQ NULL pointer deref fix
923 The function X509_to_X509_REQ will crash with a NULL pointer dereference if
924 the certificate key is invalid. This function is rarely used in practice.
926 This issue was discovered by Brian Carpenter.
930 *) Removed the export ciphers from the DEFAULT ciphers
933 Changes between 1.0.1l and 1.0.2 [22 Jan 2015]
935 *) Facilitate "universal" ARM builds targeting range of ARM ISAs, e.g.
936 ARMv5 through ARMv8, as opposite to "locking" it to single one.
937 So far those who have to target multiple plaforms would compromise
938 and argue that binary targeting say ARMv5 would still execute on
939 ARMv8. "Universal" build resolves this compromise by providing
940 near-optimal performance even on newer platforms.
943 *) Accelerated NIST P-256 elliptic curve implementation for x86_64
944 (other platforms pending).
945 [Shay Gueron & Vlad Krasnov (Intel Corp), Andy Polyakov]
947 *) Add support for the SignedCertificateTimestampList certificate and
948 OCSP response extensions from RFC6962.
951 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
952 for corner cases. (Certain input points at infinity could lead to
953 bogus results, with non-infinity inputs mapped to infinity too.)
956 *) Initial support for PowerISA 2.0.7, first implemented in POWER8.
957 This covers AES, SHA256/512 and GHASH. "Initial" means that most
958 common cases are optimized and there still is room for further
959 improvements. Vector Permutation AES for Altivec is also added.
962 *) Add support for little-endian ppc64 Linux target.
963 [Marcelo Cerri (IBM)]
965 *) Initial support for AMRv8 ISA crypto extensions. This covers AES,
966 SHA1, SHA256 and GHASH. "Initial" means that most common cases
967 are optimized and there still is room for further improvements.
968 Both 32- and 64-bit modes are supported.
969 [Andy Polyakov, Ard Biesheuvel (Linaro)]
971 *) Improved ARMv7 NEON support.
974 *) Support for SPARC Architecture 2011 crypto extensions, first
975 implemented in SPARC T4. This covers AES, DES, Camellia, SHA1,
976 SHA256/512, MD5, GHASH and modular exponentiation.
977 [Andy Polyakov, David Miller]
979 *) Accelerated modular exponentiation for Intel processors, a.k.a.
981 [Shay Gueron & Vlad Krasnov (Intel Corp)]
983 *) Support for new and upcoming Intel processors, including AVX2,
984 BMI and SHA ISA extensions. This includes additional "stitched"
985 implementations, AESNI-SHA256 and GCM, and multi-buffer support
988 This work was sponsored by Intel Corp.
991 *) Support for DTLS 1.2. This adds two sets of DTLS methods: DTLS_*_method()
992 supports both DTLS 1.2 and 1.0 and should use whatever version the peer
993 supports and DTLSv1_2_*_method() which supports DTLS 1.2 only.
996 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
997 this fixes a limiation in previous versions of OpenSSL.
1000 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
1001 MGF1 digest and OAEP label.
1004 *) Add EVP support for key wrapping algorithms, to avoid problems with
1005 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
1006 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
1007 algorithms and include tests cases.
1010 *) Add functions to allocate and set the fields of an ECDSA_METHOD
1012 [Douglas E. Engert, Steve Henson]
1014 *) New functions OPENSSL_gmtime_diff and ASN1_TIME_diff to find the
1015 difference in days and seconds between two tm or ASN1_TIME structures.
1018 *) Add -rev test option to s_server to just reverse order of characters
1019 received by client and send back to server. Also prints an abbreviated
1020 summary of the connection parameters.
1023 *) New option -brief for s_client and s_server to print out a brief summary
1024 of connection parameters.
1027 *) Add callbacks for arbitrary TLS extensions.
1028 [Trevor Perrin <trevp@trevp.net> and Ben Laurie]
1030 *) New option -crl_download in several openssl utilities to download CRLs
1031 from CRLDP extension in certificates.
1034 *) New options -CRL and -CRLform for s_client and s_server for CRLs.
1037 *) New function X509_CRL_diff to generate a delta CRL from the difference
1038 of two full CRLs. Add support to "crl" utility.
1041 *) New functions to set lookup_crls function and to retrieve
1042 X509_STORE from X509_STORE_CTX.
1045 *) Print out deprecated issuer and subject unique ID fields in
1049 *) Extend OCSP I/O functions so they can be used for simple general purpose
1050 HTTP as well as OCSP. New wrapper function which can be used to download
1051 CRLs using the OCSP API.
1054 *) Delegate command line handling in s_client/s_server to SSL_CONF APIs.
1057 *) SSL_CONF* functions. These provide a common framework for application
1058 configuration using configuration files or command lines.
1061 *) SSL/TLS tracing code. This parses out SSL/TLS records using the
1062 message callback and prints the results. Needs compile time option
1063 "enable-ssl-trace". New options to s_client and s_server to enable
1067 *) New ctrl and macro to retrieve supported points extensions.
1068 Print out extension in s_server and s_client.
1071 *) New functions to retrieve certificate signature and signature
1075 *) Add functions to retrieve and manipulate the raw cipherlist sent by a
1079 *) New Suite B modes for TLS code. These use and enforce the requirements
1080 of RFC6460: restrict ciphersuites, only permit Suite B algorithms and
1081 only use Suite B curves. The Suite B modes can be set by using the
1082 strings "SUITEB128", "SUITEB192" or "SUITEB128ONLY" for the cipherstring.
1085 *) New chain verification flags for Suite B levels of security. Check
1086 algorithms are acceptable when flags are set in X509_verify_cert.
1089 *) Make tls1_check_chain return a set of flags indicating checks passed
1090 by a certificate chain. Add additional tests to handle client
1091 certificates: checks for matching certificate type and issuer name
1095 *) If an attempt is made to use a signature algorithm not in the peer
1096 preference list abort the handshake. If client has no suitable
1097 signature algorithms in response to a certificate request do not
1098 use the certificate.
1101 *) If server EC tmp key is not in client preference list abort handshake.
1104 *) Add support for certificate stores in CERT structure. This makes it
1105 possible to have different stores per SSL structure or one store in
1106 the parent SSL_CTX. Include distint stores for certificate chain
1107 verification and chain building. New ctrl SSL_CTRL_BUILD_CERT_CHAIN
1108 to build and store a certificate chain in CERT structure: returing
1109 an error if the chain cannot be built: this will allow applications
1110 to test if a chain is correctly configured.
1112 Note: if the CERT based stores are not set then the parent SSL_CTX
1113 store is used to retain compatibility with existing behaviour.
1117 *) New function ssl_set_client_disabled to set a ciphersuite disabled
1118 mask based on the current session, check mask when sending client
1119 hello and checking the requested ciphersuite.
1122 *) New ctrls to retrieve and set certificate types in a certificate
1123 request message. Print out received values in s_client. If certificate
1124 types is not set with custom values set sensible values based on
1125 supported signature algorithms.
1128 *) Support for distinct client and server supported signature algorithms.
1131 *) Add certificate callback. If set this is called whenever a certificate
1132 is required by client or server. An application can decide which
1133 certificate chain to present based on arbitrary criteria: for example
1134 supported signature algorithms. Add very simple example to s_server.
1135 This fixes many of the problems and restrictions of the existing client
1136 certificate callback: for example you can now clear an existing
1137 certificate and specify the whole chain.
1140 *) Add new "valid_flags" field to CERT_PKEY structure which determines what
1141 the certificate can be used for (if anything). Set valid_flags field
1142 in new tls1_check_chain function. Simplify ssl_set_cert_masks which used
1143 to have similar checks in it.
1145 Add new "cert_flags" field to CERT structure and include a "strict mode".
1146 This enforces some TLS certificate requirements (such as only permitting
1147 certificate signature algorithms contained in the supported algorithms
1148 extension) which some implementations ignore: this option should be used
1149 with caution as it could cause interoperability issues.
1152 *) Update and tidy signature algorithm extension processing. Work out
1153 shared signature algorithms based on preferences and peer algorithms
1154 and print them out in s_client and s_server. Abort handshake if no
1155 shared signature algorithms.
1158 *) Add new functions to allow customised supported signature algorithms
1159 for SSL and SSL_CTX structures. Add options to s_client and s_server
1163 *) New function SSL_certs_clear() to delete all references to certificates
1164 from an SSL structure. Before this once a certificate had been added
1165 it couldn't be removed.
1168 *) Integrate hostname, email address and IP address checking with certificate
1169 verification. New verify options supporting checking in opensl utility.
1172 *) Fixes and wildcard matching support to hostname and email checking
1173 functions. Add manual page.
1174 [Florian Weimer (Red Hat Product Security Team)]
1176 *) New functions to check a hostname email or IP address against a
1177 certificate. Add options x509 utility to print results of checks against
1181 *) Fix OCSP checking.
1182 [Rob Stradling <rob.stradling@comodo.com> and Ben Laurie]
1184 *) Initial experimental support for explicitly trusted non-root CAs.
1185 OpenSSL still tries to build a complete chain to a root but if an
1186 intermediate CA has a trust setting included that is used. The first
1187 setting is used: whether to trust (e.g., -addtrust option to the x509
1191 *) Add -trusted_first option which attempts to find certificates in the
1192 trusted store even if an untrusted chain is also supplied.
1195 *) MIPS assembly pack updates: support for MIPS32r2 and SmartMIPS ASE,
1196 platform support for Linux and Android.
1199 *) Support for linux-x32, ILP32 environment in x86_64 framework.
1202 *) Experimental multi-implementation support for FIPS capable OpenSSL.
1203 When in FIPS mode the approved implementations are used as normal,
1204 when not in FIPS mode the internal unapproved versions are used instead.
1205 This means that the FIPS capable OpenSSL isn't forced to use the
1206 (often lower performance) FIPS implementations outside FIPS mode.
1209 *) Transparently support X9.42 DH parameters when calling
1210 PEM_read_bio_DHparameters. This means existing applications can handle
1211 the new parameter format automatically.
1214 *) Initial experimental support for X9.42 DH parameter format: mainly
1215 to support use of 'q' parameter for RFC5114 parameters.
1218 *) Add DH parameters from RFC5114 including test data to dhtest.
1221 *) Support for automatic EC temporary key parameter selection. If enabled
1222 the most preferred EC parameters are automatically used instead of
1223 hardcoded fixed parameters. Now a server just has to call:
1224 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
1225 support ECDH and use the most appropriate parameters.
1228 *) Enhance and tidy EC curve and point format TLS extension code. Use
1229 static structures instead of allocation if default values are used.
1230 New ctrls to set curves we wish to support and to retrieve shared curves.
1231 Print out shared curves in s_server. New options to s_server and s_client
1232 to set list of supported curves.
1235 *) New ctrls to retrieve supported signature algorithms and
1236 supported curve values as an array of NIDs. Extend openssl utility
1237 to print out received values.
1240 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
1241 between NIDs and the more common NIST names such as "P-256". Enhance
1242 ecparam utility and ECC method to recognise the NIST names for curves.
1245 *) Enhance SSL/TLS certificate chain handling to support different
1246 chains for each certificate instead of one chain in the parent SSL_CTX.
1249 *) Support for fixed DH ciphersuite client authentication: where both
1250 server and client use DH certificates with common parameters.
1253 *) Support for fixed DH ciphersuites: those requiring DH server
1257 *) New function i2d_re_X509_tbs for re-encoding the TBS portion of
1259 Note: Related 1.0.2-beta specific macros X509_get_cert_info,
1260 X509_CINF_set_modified, X509_CINF_get_issuer, X509_CINF_get_extensions and
1261 X509_CINF_get_signature were reverted post internal team review.
1263 Changes between 1.0.1k and 1.0.1l [15 Jan 2015]
1265 *) Build fixes for the Windows and OpenVMS platforms
1266 [Matt Caswell and Richard Levitte]
1268 Changes between 1.0.1j and 1.0.1k [8 Jan 2015]
1270 *) Fix DTLS segmentation fault in dtls1_get_record. A carefully crafted DTLS
1271 message can cause a segmentation fault in OpenSSL due to a NULL pointer
1272 dereference. This could lead to a Denial Of Service attack. Thanks to
1273 Markus Stenberg of Cisco Systems, Inc. for reporting this issue.
1277 *) Fix DTLS memory leak in dtls1_buffer_record. A memory leak can occur in the
1278 dtls1_buffer_record function under certain conditions. In particular this
1279 could occur if an attacker sent repeated DTLS records with the same
1280 sequence number but for the next epoch. The memory leak could be exploited
1281 by an attacker in a Denial of Service attack through memory exhaustion.
1282 Thanks to Chris Mueller for reporting this issue.
1286 *) Fix issue where no-ssl3 configuration sets method to NULL. When openssl is
1287 built with the no-ssl3 option and a SSL v3 ClientHello is received the ssl
1288 method would be set to NULL which could later result in a NULL pointer
1289 dereference. Thanks to Frank Schmirler for reporting this issue.
1293 *) Abort handshake if server key exchange message is omitted for ephemeral
1296 Thanks to Karthikeyan Bhargavan of the PROSECCO team at INRIA for
1297 reporting this issue.
1301 *) Remove non-export ephemeral RSA code on client and server. This code
1302 violated the TLS standard by allowing the use of temporary RSA keys in
1303 non-export ciphersuites and could be used by a server to effectively
1304 downgrade the RSA key length used to a value smaller than the server
1305 certificate. Thanks for Karthikeyan Bhargavan of the PROSECCO team at
1306 INRIA or reporting this issue.
1310 *) Fixed issue where DH client certificates are accepted without verification.
1311 An OpenSSL server will accept a DH certificate for client authentication
1312 without the certificate verify message. This effectively allows a client to
1313 authenticate without the use of a private key. This only affects servers
1314 which trust a client certificate authority which issues certificates
1315 containing DH keys: these are extremely rare and hardly ever encountered.
1316 Thanks for Karthikeyan Bhargavan of the PROSECCO team at INRIA or reporting
1321 *) Ensure that the session ID context of an SSL is updated when its
1322 SSL_CTX is updated via SSL_set_SSL_CTX.
1324 The session ID context is typically set from the parent SSL_CTX,
1325 and can vary with the CTX.
1328 *) Fix various certificate fingerprint issues.
1330 By using non-DER or invalid encodings outside the signed portion of a
1331 certificate the fingerprint can be changed without breaking the signature.
1332 Although no details of the signed portion of the certificate can be changed
1333 this can cause problems with some applications: e.g. those using the
1334 certificate fingerprint for blacklists.
1336 1. Reject signatures with non zero unused bits.
1338 If the BIT STRING containing the signature has non zero unused bits reject
1339 the signature. All current signature algorithms require zero unused bits.
1341 2. Check certificate algorithm consistency.
1343 Check the AlgorithmIdentifier inside TBS matches the one in the
1344 certificate signature. NB: this will result in signature failure
1345 errors for some broken certificates.
1347 Thanks to Konrad Kraszewski from Google for reporting this issue.
1349 3. Check DSA/ECDSA signatures use DER.
1351 Reencode DSA/ECDSA signatures and compare with the original received
1352 signature. Return an error if there is a mismatch.
1354 This will reject various cases including garbage after signature
1355 (thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
1356 program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
1357 (negative or with leading zeroes).
1359 Further analysis was conducted and fixes were developed by Stephen Henson
1360 of the OpenSSL core team.
1365 *) Correct Bignum squaring. Bignum squaring (BN_sqr) may produce incorrect
1366 results on some platforms, including x86_64. This bug occurs at random
1367 with a very low probability, and is not known to be exploitable in any
1368 way, though its exact impact is difficult to determine. Thanks to Pieter
1369 Wuille (Blockstream) who reported this issue and also suggested an initial
1370 fix. Further analysis was conducted by the OpenSSL development team and
1371 Adam Langley of Google. The final fix was developed by Andy Polyakov of
1372 the OpenSSL core team.
1376 *) Do not resume sessions on the server if the negotiated protocol
1377 version does not match the session's version. Resuming with a different
1378 version, while not strictly forbidden by the RFC, is of questionable
1379 sanity and breaks all known clients.
1380 [David Benjamin, Emilia Käsper]
1382 *) Tighten handling of the ChangeCipherSpec (CCS) message: reject
1383 early CCS messages during renegotiation. (Note that because
1384 renegotiation is encrypted, this early CCS was not exploitable.)
1387 *) Tighten client-side session ticket handling during renegotiation:
1388 ensure that the client only accepts a session ticket if the server sends
1389 the extension anew in the ServerHello. Previously, a TLS client would
1390 reuse the old extension state and thus accept a session ticket if one was
1391 announced in the initial ServerHello.
1393 Similarly, ensure that the client requires a session ticket if one
1394 was advertised in the ServerHello. Previously, a TLS client would
1395 ignore a missing NewSessionTicket message.
1398 Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
1400 *) SRTP Memory Leak.
1402 A flaw in the DTLS SRTP extension parsing code allows an attacker, who
1403 sends a carefully crafted handshake message, to cause OpenSSL to fail
1404 to free up to 64k of memory causing a memory leak. This could be
1405 exploited in a Denial Of Service attack. This issue affects OpenSSL
1406 1.0.1 server implementations for both SSL/TLS and DTLS regardless of
1407 whether SRTP is used or configured. Implementations of OpenSSL that
1408 have been compiled with OPENSSL_NO_SRTP defined are not affected.
1410 The fix was developed by the OpenSSL team.
1414 *) Session Ticket Memory Leak.
1416 When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
1417 integrity of that ticket is first verified. In the event of a session
1418 ticket integrity check failing, OpenSSL will fail to free memory
1419 causing a memory leak. By sending a large number of invalid session
1420 tickets an attacker could exploit this issue in a Denial Of Service
1425 *) Build option no-ssl3 is incomplete.
1427 When OpenSSL is configured with "no-ssl3" as a build option, servers
1428 could accept and complete a SSL 3.0 handshake, and clients could be
1429 configured to send them.
1431 [Akamai and the OpenSSL team]
1433 *) Add support for TLS_FALLBACK_SCSV.
1434 Client applications doing fallback retries should call
1435 SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
1437 [Adam Langley, Bodo Moeller]
1439 *) Add additional DigestInfo checks.
1441 Reencode DigestInto in DER and check against the original when
1442 verifying RSA signature: this will reject any improperly encoded
1443 DigestInfo structures.
1445 Note: this is a precautionary measure and no attacks are currently known.
1449 Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
1451 *) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
1452 SRP code can be overrun an internal buffer. Add sanity check that
1453 g, A, B < N to SRP code.
1455 Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
1456 Group for discovering this issue.
1460 *) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
1461 TLS 1.0 instead of higher protocol versions when the ClientHello message
1462 is badly fragmented. This allows a man-in-the-middle attacker to force a
1463 downgrade to TLS 1.0 even if both the server and the client support a
1464 higher protocol version, by modifying the client's TLS records.
1466 Thanks to David Benjamin and Adam Langley (Google) for discovering and
1467 researching this issue.
1471 *) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
1472 to a denial of service attack. A malicious server can crash the client
1473 with a null pointer dereference (read) by specifying an anonymous (EC)DH
1474 ciphersuite and sending carefully crafted handshake messages.
1476 Thanks to Felix Gröbert (Google) for discovering and researching this
1481 *) By sending carefully crafted DTLS packets an attacker could cause openssl
1482 to leak memory. This can be exploited through a Denial of Service attack.
1483 Thanks to Adam Langley for discovering and researching this issue.
1487 *) An attacker can force openssl to consume large amounts of memory whilst
1488 processing DTLS handshake messages. This can be exploited through a
1489 Denial of Service attack.
1490 Thanks to Adam Langley for discovering and researching this issue.
1494 *) An attacker can force an error condition which causes openssl to crash
1495 whilst processing DTLS packets due to memory being freed twice. This
1496 can be exploited through a Denial of Service attack.
1497 Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
1502 *) If a multithreaded client connects to a malicious server using a resumed
1503 session and the server sends an ec point format extension it could write
1504 up to 255 bytes to freed memory.
1506 Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
1511 *) A malicious server can crash an OpenSSL client with a null pointer
1512 dereference (read) by specifying an SRP ciphersuite even though it was not
1513 properly negotiated with the client. This can be exploited through a
1514 Denial of Service attack.
1516 Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
1517 discovering and researching this issue.
1521 *) A flaw in OBJ_obj2txt may cause pretty printing functions such as
1522 X509_name_oneline, X509_name_print_ex et al. to leak some information
1523 from the stack. Applications may be affected if they echo pretty printing
1524 output to the attacker.
1526 Thanks to Ivan Fratric (Google) for discovering this issue.
1528 [Emilia Käsper, and Steve Henson]
1530 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
1531 for corner cases. (Certain input points at infinity could lead to
1532 bogus results, with non-infinity inputs mapped to infinity too.)
1535 Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
1537 *) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
1538 handshake can force the use of weak keying material in OpenSSL
1539 SSL/TLS clients and servers.
1541 Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
1542 researching this issue. (CVE-2014-0224)
1543 [KIKUCHI Masashi, Steve Henson]
1545 *) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
1546 OpenSSL DTLS client the code can be made to recurse eventually crashing
1549 Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
1551 [Imre Rad, Steve Henson]
1553 *) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
1554 be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
1555 client or server. This is potentially exploitable to run arbitrary
1556 code on a vulnerable client or server.
1558 Thanks to Jüri Aedla for reporting this issue. (CVE-2014-0195)
1559 [Jüri Aedla, Steve Henson]
1561 *) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
1562 are subject to a denial of service attack.
1564 Thanks to Felix Gröbert and Ivan Fratric at Google for discovering
1565 this issue. (CVE-2014-3470)
1566 [Felix Gröbert, Ivan Fratric, Steve Henson]
1568 *) Harmonize version and its documentation. -f flag is used to display
1570 [mancha <mancha1@zoho.com>]
1572 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
1573 in i2d_ECPrivateKey.
1574 [mancha <mancha1@zoho.com>]
1576 *) Fix some double frees. These are not thought to be exploitable.
1577 [mancha <mancha1@zoho.com>]
1579 Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
1581 *) A missing bounds check in the handling of the TLS heartbeat extension
1582 can be used to reveal up to 64k of memory to a connected client or
1585 Thanks for Neel Mehta of Google Security for discovering this bug and to
1586 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
1587 preparing the fix (CVE-2014-0160)
1588 [Adam Langley, Bodo Moeller]
1590 *) Fix for the attack described in the paper "Recovering OpenSSL
1591 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
1592 by Yuval Yarom and Naomi Benger. Details can be obtained from:
1593 http://eprint.iacr.org/2014/140
1595 Thanks to Yuval Yarom and Naomi Benger for discovering this
1596 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
1597 [Yuval Yarom and Naomi Benger]
1599 *) TLS pad extension: draft-agl-tls-padding-03
1601 Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
1602 TLS client Hello record length value would otherwise be > 255 and
1603 less that 512 pad with a dummy extension containing zeroes so it
1604 is at least 512 bytes long.
1606 [Adam Langley, Steve Henson]
1608 Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
1610 *) Fix for TLS record tampering bug. A carefully crafted invalid
1611 handshake could crash OpenSSL with a NULL pointer exception.
1612 Thanks to Anton Johansson for reporting this issues.
1615 *) Keep original DTLS digest and encryption contexts in retransmission
1616 structures so we can use the previous session parameters if they need
1617 to be resent. (CVE-2013-6450)
1620 *) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
1621 avoids preferring ECDHE-ECDSA ciphers when the client appears to be
1622 Safari on OS X. Safari on OS X 10.8..10.8.3 advertises support for
1623 several ECDHE-ECDSA ciphers, but fails to negotiate them. The bug
1624 is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
1625 10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
1626 [Rob Stradling, Adam Langley]
1628 Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
1630 *) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
1631 supporting platforms or when small records were transferred.
1632 [Andy Polyakov, Steve Henson]
1634 Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
1636 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
1638 This addresses the flaw in CBC record processing discovered by
1639 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
1640 at: http://www.isg.rhul.ac.uk/tls/
1642 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1643 Security Group at Royal Holloway, University of London
1644 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
1645 Emilia Käsper for the initial patch.
1647 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
1649 *) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
1650 ciphersuites which can be exploited in a denial of service attack.
1651 Thanks go to and to Adam Langley <agl@chromium.org> for discovering
1652 and detecting this bug and to Wolfgang Ettlinger
1653 <wolfgang.ettlinger@gmail.com> for independently discovering this issue.
1657 *) Return an error when checking OCSP signatures when key is NULL.
1658 This fixes a DoS attack. (CVE-2013-0166)
1661 *) Make openssl verify return errors.
1662 [Chris Palmer <palmer@google.com> and Ben Laurie]
1664 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
1665 the right response is stapled. Also change SSL_get_certificate()
1666 so it returns the certificate actually sent.
1667 See http://rt.openssl.org/Ticket/Display.html?id=2836.
1668 [Rob Stradling <rob.stradling@comodo.com>]
1670 *) Fix possible deadlock when decoding public keys.
1673 *) Don't use TLS 1.0 record version number in initial client hello
1677 Changes between 1.0.1b and 1.0.1c [10 May 2012]
1679 *) Sanity check record length before skipping explicit IV in TLS
1680 1.2, 1.1 and DTLS to fix DoS attack.
1682 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
1683 fuzzing as a service testing platform.
1687 *) Initialise tkeylen properly when encrypting CMS messages.
1688 Thanks to Solar Designer of Openwall for reporting this issue.
1691 *) In FIPS mode don't try to use composite ciphers as they are not
1695 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
1697 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
1698 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
1699 mean any application compiled against OpenSSL 1.0.0 headers setting
1700 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
1701 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
1702 0x10000000L Any application which was previously compiled against
1703 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
1704 will need to be recompiled as a result. Letting be results in
1705 inability to disable specifically TLS 1.1 and in client context,
1706 in unlike event, limit maximum offered version to TLS 1.0 [see below].
1709 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
1710 disable just protocol X, but all protocols above X *if* there are
1711 protocols *below* X still enabled. In more practical terms it means
1712 that if application wants to disable TLS1.0 in favor of TLS1.1 and
1713 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
1714 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
1718 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
1720 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
1721 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
1722 in CRYPTO_realloc_clean.
1724 Thanks to Tavis Ormandy, Google Security Team, for discovering this
1725 issue and to Adam Langley <agl@chromium.org> for fixing it.
1727 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
1729 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
1732 *) Workarounds for some broken servers that "hang" if a client hello
1733 record length exceeds 255 bytes.
1735 1. Do not use record version number > TLS 1.0 in initial client
1736 hello: some (but not all) hanging servers will now work.
1737 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
1738 the number of ciphers sent in the client hello. This should be
1739 set to an even number, such as 50, for example by passing:
1740 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
1741 Most broken servers should now work.
1742 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
1743 TLS 1.2 client support entirely.
1746 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
1749 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
1751 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
1752 STRING form instead of a DigestInfo.
1755 *) The format used for MDC2 RSA signatures is inconsistent between EVP
1756 and the RSA_sign/RSA_verify functions. This was made more apparent when
1757 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
1758 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
1759 the correct format in RSA_verify so both forms transparently work.
1762 *) Some servers which support TLS 1.0 can choke if we initially indicate
1763 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
1764 encrypted premaster secret. As a workaround use the maximum permitted
1765 client version in client hello, this should keep such servers happy
1766 and still work with previous versions of OpenSSL.
1769 *) Add support for TLS/DTLS heartbeats.
1770 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1772 *) Add support for SCTP.
1773 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1775 *) Improved PRNG seeding for VOS.
1776 [Paul Green <Paul.Green@stratus.com>]
1778 *) Extensive assembler packs updates, most notably:
1780 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
1781 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
1782 - x86_64: bit-sliced AES implementation;
1783 - ARM: NEON support, contemporary platforms optimizations;
1784 - s390x: z196 support;
1785 - *: GHASH and GF(2^m) multiplication implementations;
1789 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
1790 (removal of unnecessary code)
1791 [Peter Sylvester <peter.sylvester@edelweb.fr>]
1793 *) Add TLS key material exporter from RFC 5705.
1796 *) Add DTLS-SRTP negotiation from RFC 5764.
1799 *) Add Next Protocol Negotiation,
1800 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
1801 disabled with a no-npn flag to config or Configure. Code donated
1803 [Adam Langley <agl@google.com> and Ben Laurie]
1805 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
1806 NIST-P256, NIST-P521, with constant-time single point multiplication on
1807 typical inputs. Compiler support for the nonstandard type __uint128_t is
1808 required to use this (present in gcc 4.4 and later, for 64-bit builds).
1809 Code made available under Apache License version 2.0.
1811 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
1812 line to include this in your build of OpenSSL, and run "make depend" (or
1813 "make update"). This enables the following EC_METHODs:
1815 EC_GFp_nistp224_method()
1816 EC_GFp_nistp256_method()
1817 EC_GFp_nistp521_method()
1819 EC_GROUP_new_by_curve_name() will automatically use these (while
1820 EC_GROUP_new_curve_GFp() currently prefers the more flexible
1822 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
1824 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
1825 all platforms. Move ssize_t definition from e_os.h to the public
1826 header file e_os2.h as it now appears in public header file cms.h
1829 *) New -sigopt option to the ca, req and x509 utilities. Additional
1830 signature parameters can be passed using this option and in
1834 *) Add RSA PSS signing function. This will generate and set the
1835 appropriate AlgorithmIdentifiers for PSS based on those in the
1836 corresponding EVP_MD_CTX structure. No application support yet.
1839 *) Support for companion algorithm specific ASN1 signing routines.
1840 New function ASN1_item_sign_ctx() signs a pre-initialised
1841 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
1842 the appropriate parameters.
1845 *) Add new algorithm specific ASN1 verification initialisation function
1846 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
1847 handling will be the same no matter what EVP_PKEY_METHOD is used.
1848 Add a PSS handler to support verification of PSS signatures: checked
1849 against a number of sample certificates.
1852 *) Add signature printing for PSS. Add PSS OIDs.
1853 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
1855 *) Add algorithm specific signature printing. An individual ASN1 method
1856 can now print out signatures instead of the standard hex dump.
1858 More complex signatures (e.g. PSS) can print out more meaningful
1859 information. Include DSA version that prints out the signature
1863 *) Password based recipient info support for CMS library: implementing
1867 *) Split password based encryption into PBES2 and PBKDF2 functions. This
1868 neatly separates the code into cipher and PBE sections and is required
1869 for some algorithms that split PBES2 into separate pieces (such as
1870 password based CMS).
1873 *) Session-handling fixes:
1874 - Fix handling of connections that are resuming with a session ID,
1875 but also support Session Tickets.
1876 - Fix a bug that suppressed issuing of a new ticket if the client
1877 presented a ticket with an expired session.
1878 - Try to set the ticket lifetime hint to something reasonable.
1879 - Make tickets shorter by excluding irrelevant information.
1880 - On the client side, don't ignore renewed tickets.
1881 [Adam Langley, Bodo Moeller (Google)]
1883 *) Fix PSK session representation.
1886 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
1888 This work was sponsored by Intel.
1891 *) Add GCM support to TLS library. Some custom code is needed to split
1892 the IV between the fixed (from PRF) and explicit (from TLS record)
1893 portions. This adds all GCM ciphersuites supported by RFC5288 and
1894 RFC5289. Generalise some AES* cipherstrings to include GCM and
1895 add a special AESGCM string for GCM only.
1898 *) Expand range of ctrls for AES GCM. Permit setting invocation
1899 field on decrypt and retrieval of invocation field only on encrypt.
1902 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
1903 As required by RFC5289 these ciphersuites cannot be used if for
1904 versions of TLS earlier than 1.2.
1907 *) For FIPS capable OpenSSL interpret a NULL default public key method
1908 as unset and return the appropriate default but do *not* set the default.
1909 This means we can return the appropriate method in applications that
1910 switch between FIPS and non-FIPS modes.
1913 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
1914 ENGINE is used then we cannot handle that in the FIPS module so we
1915 keep original code iff non-FIPS operations are allowed.
1918 *) Add -attime option to openssl utilities.
1919 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
1921 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
1924 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
1925 FIPS EC methods unconditionally for now.
1928 *) New build option no-ec2m to disable characteristic 2 code.
1931 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
1932 all cases can be covered as some introduce binary incompatibilities.
1935 *) Redirect RSA operations to FIPS module including keygen,
1936 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
1939 *) Add similar low level API blocking to ciphers.
1942 *) Low level digest APIs are not approved in FIPS mode: any attempt
1943 to use these will cause a fatal error. Applications that *really* want
1944 to use them can use the private_* version instead.
1947 *) Redirect cipher operations to FIPS module for FIPS builds.
1950 *) Redirect digest operations to FIPS module for FIPS builds.
1953 *) Update build system to add "fips" flag which will link in fipscanister.o
1954 for static and shared library builds embedding a signature if needed.
1957 *) Output TLS supported curves in preference order instead of numerical
1958 order. This is currently hardcoded for the highest order curves first.
1959 This should be configurable so applications can judge speed vs strength.
1962 *) Add TLS v1.2 server support for client authentication.
1965 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
1969 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
1970 FIPS modules versions.
1973 *) Add TLS v1.2 client side support for client authentication. Keep cache
1974 of handshake records longer as we don't know the hash algorithm to use
1975 until after the certificate request message is received.
1978 *) Initial TLS v1.2 client support. Add a default signature algorithms
1979 extension including all the algorithms we support. Parse new signature
1980 format in client key exchange. Relax some ECC signing restrictions for
1981 TLS v1.2 as indicated in RFC5246.
1984 *) Add server support for TLS v1.2 signature algorithms extension. Switch
1985 to new signature format when needed using client digest preference.
1986 All server ciphersuites should now work correctly in TLS v1.2. No client
1987 support yet and no support for client certificates.
1990 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
1991 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
1992 ciphersuites. At present only RSA key exchange ciphersuites work with
1993 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
1994 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
1995 and version checking.
1998 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
1999 with this defined it will not be affected by any changes to ssl internal
2000 structures. Add several utility functions to allow openssl application
2001 to work with OPENSSL_NO_SSL_INTERN defined.
2005 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
2007 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
2010 *) Permit abbreviated handshakes when renegotiating using the function
2011 SSL_renegotiate_abbreviated().
2012 [Robin Seggelmann <seggelmann@fh-muenster.de>]
2014 *) Add call to ENGINE_register_all_complete() to
2015 ENGINE_load_builtin_engines(), so some implementations get used
2016 automatically instead of needing explicit application support.
2019 *) Add support for TLS key exporter as described in RFC5705.
2020 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
2022 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
2023 a few changes are required:
2025 Add SSL_OP_NO_TLSv1_1 flag.
2026 Add TLSv1_1 methods.
2027 Update version checking logic to handle version 1.1.
2028 Add explicit IV handling (ported from DTLS code).
2029 Add command line options to s_client/s_server.
2032 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
2034 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
2035 in CMS and PKCS7 code. When RSA decryption fails use a random key for
2036 content decryption and always return the same error. Note: this attack
2037 needs on average 2^20 messages so it only affects automated senders. The
2038 old behaviour can be reenabled in the CMS code by setting the
2039 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
2040 an MMA defence is not necessary.
2041 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
2042 this issue. (CVE-2012-0884)
2045 *) Fix CVE-2011-4619: make sure we really are receiving a
2046 client hello before rejecting multiple SGC restarts. Thanks to
2047 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
2050 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
2052 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
2053 Thanks to Antonio Martin, Enterprise Secure Access Research and
2054 Development, Cisco Systems, Inc. for discovering this bug and
2055 preparing a fix. (CVE-2012-0050)
2058 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
2060 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
2061 of the Vaudenay padding oracle attack on CBC mode encryption
2062 which enables an efficient plaintext recovery attack against
2063 the OpenSSL implementation of DTLS. Their attack exploits timing
2064 differences arising during decryption processing. A research
2065 paper describing this attack can be found at:
2066 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
2067 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
2068 Security Group at Royal Holloway, University of London
2069 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
2070 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
2071 for preparing the fix. (CVE-2011-4108)
2072 [Robin Seggelmann, Michael Tuexen]
2074 *) Clear bytes used for block padding of SSL 3.0 records.
2076 [Adam Langley (Google)]
2078 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
2079 Kadianakis <desnacked@gmail.com> for discovering this issue and
2080 Adam Langley for preparing the fix. (CVE-2011-4619)
2081 [Adam Langley (Google)]
2083 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
2084 [Andrey Kulikov <amdeich@gmail.com>]
2086 *) Prevent malformed RFC3779 data triggering an assertion failure.
2087 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
2088 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
2089 [Rob Austein <sra@hactrn.net>]
2091 *) Improved PRNG seeding for VOS.
2092 [Paul Green <Paul.Green@stratus.com>]
2094 *) Fix ssl_ciph.c set-up race.
2095 [Adam Langley (Google)]
2097 *) Fix spurious failures in ecdsatest.c.
2098 [Emilia Käsper (Google)]
2100 *) Fix the BIO_f_buffer() implementation (which was mixing different
2101 interpretations of the '..._len' fields).
2102 [Adam Langley (Google)]
2104 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
2105 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
2106 threads won't reuse the same blinding coefficients.
2108 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
2109 lock to call BN_BLINDING_invert_ex, and avoids one use of
2110 BN_BLINDING_update for each BN_BLINDING structure (previously,
2111 the last update always remained unused).
2112 [Emilia Käsper (Google)]
2114 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
2115 [Bob Buckholz (Google)]
2117 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
2119 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
2120 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
2121 [Kaspar Brand <ossl@velox.ch>]
2123 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
2124 for multi-threaded use of ECDH. (CVE-2011-3210)
2125 [Adam Langley (Google)]
2127 *) Fix x509_name_ex_d2i memory leak on bad inputs.
2130 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
2131 signature public key algorithm by using OID xref utilities instead.
2132 Before this you could only use some ECC ciphersuites with SHA1 only.
2135 *) Add protection against ECDSA timing attacks as mentioned in the paper
2136 by Billy Bob Brumley and Nicola Tuveri, see:
2138 http://eprint.iacr.org/2011/232.pdf
2140 [Billy Bob Brumley and Nicola Tuveri]
2142 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
2144 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
2145 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
2147 *) Fix bug in string printing code: if *any* escaping is enabled we must
2148 escape the escape character (backslash) or the resulting string is
2152 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
2154 *) Disable code workaround for ancient and obsolete Netscape browsers
2155 and servers: an attacker can use it in a ciphersuite downgrade attack.
2156 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
2159 *) Fixed J-PAKE implementation error, originally discovered by
2160 Sebastien Martini, further info and confirmation from Stefan
2161 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
2164 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
2166 *) Fix extension code to avoid race conditions which can result in a buffer
2167 overrun vulnerability: resumed sessions must not be modified as they can
2168 be shared by multiple threads. CVE-2010-3864
2171 *) Fix WIN32 build system to correctly link an ENGINE directory into
2175 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
2177 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
2179 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
2181 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
2183 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
2184 context. The operation can be customised via the ctrl mechanism in
2185 case ENGINEs want to include additional functionality.
2188 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
2191 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
2192 output hashes compatible with older versions of OpenSSL.
2193 [Willy Weisz <weisz@vcpc.univie.ac.at>]
2195 *) Fix compression algorithm handling: if resuming a session use the
2196 compression algorithm of the resumed session instead of determining
2197 it from client hello again. Don't allow server to change algorithm.
2200 *) Add load_crls() function to apps tidying load_certs() too. Add option
2201 to verify utility to allow additional CRLs to be included.
2204 *) Update OCSP request code to permit adding custom headers to the request:
2205 some responders need this.
2208 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
2210 [Julia Lawall <julia@diku.dk>]
2212 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
2213 needlessly dereferenced structures, used obsolete functions and
2214 didn't handle all updated verify codes correctly.
2217 *) Disable MD2 in the default configuration.
2220 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
2221 indicate the initial BIO being pushed or popped. This makes it possible
2222 to determine whether the BIO is the one explicitly called or as a result
2223 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
2224 it handles reference counts correctly and doesn't zero out the I/O bio
2225 when it is not being explicitly popped. WARNING: applications which
2226 included workarounds for the old buggy behaviour will need to be modified
2227 or they could free up already freed BIOs.
2230 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
2231 renaming to all platforms (within the 0.9.8 branch, this was
2232 done conditionally on Netware platforms to avoid a name clash).
2233 [Guenter <lists@gknw.net>]
2235 *) Add ECDHE and PSK support to DTLS.
2236 [Michael Tuexen <tuexen@fh-muenster.de>]
2238 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
2242 *) Add "missing" function EVP_MD_flags() (without this the only way to
2243 retrieve a digest flags is by accessing the structure directly. Update
2244 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
2245 or cipher is registered as in the "from" argument. Print out all
2246 registered digests in the dgst usage message instead of manually
2247 attempting to work them out.
2250 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
2251 this allows the use of compression and extensions. Change default cipher
2252 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
2253 by default unless an application cipher string requests it.
2256 *) Alter match criteria in PKCS12_parse(). It used to try to use local
2257 key ids to find matching certificates and keys but some PKCS#12 files
2258 don't follow the (somewhat unwritten) rules and this strategy fails.
2259 Now just gather all certificates together and the first private key
2260 then look for the first certificate that matches the key.
2263 *) Support use of registered digest and cipher names for dgst and cipher
2264 commands instead of having to add each one as a special case. So now
2271 openssl dgst -sha256 foo
2273 and this works for ENGINE based algorithms too.
2277 *) Update Gost ENGINE to support parameter files.
2278 [Victor B. Wagner <vitus@cryptocom.ru>]
2280 *) Support GeneralizedTime in ca utility.
2281 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
2283 *) Enhance the hash format used for certificate directory links. The new
2284 form uses the canonical encoding (meaning equivalent names will work
2285 even if they aren't identical) and uses SHA1 instead of MD5. This form
2286 is incompatible with the older format and as a result c_rehash should
2287 be used to rebuild symbolic links.
2290 *) Make PKCS#8 the default write format for private keys, replacing the
2291 traditional format. This form is standardised, more secure and doesn't
2292 include an implicit MD5 dependency.
2295 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
2296 committed to OpenSSL should pass this lot as a minimum.
2299 *) Add session ticket override functionality for use by EAP-FAST.
2300 [Jouni Malinen <j@w1.fi>]
2302 *) Modify HMAC functions to return a value. Since these can be implemented
2303 in an ENGINE errors can occur.
2306 *) Type-checked OBJ_bsearch_ex.
2309 *) Type-checked OBJ_bsearch. Also some constification necessitated
2310 by type-checking. Still to come: TXT_DB, bsearch(?),
2311 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
2315 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
2316 seconds to a tm structure directly, instead of going through OS
2317 specific date routines. This avoids any issues with OS routines such
2318 as the year 2038 bug. New *_adj() functions for ASN1 time structures
2319 and X509_time_adj_ex() to cover the extended range. The existing
2320 X509_time_adj() is still usable and will no longer have any date issues.
2323 *) Delta CRL support. New use deltas option which will attempt to locate
2324 and search any appropriate delta CRLs available.
2326 This work was sponsored by Google.
2329 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
2330 code and add additional score elements. Validate alternate CRL paths
2331 as part of the CRL checking and indicate a new error "CRL path validation
2332 error" in this case. Applications wanting additional details can use
2333 the verify callback and check the new "parent" field. If this is not
2334 NULL CRL path validation is taking place. Existing applications wont
2335 see this because it requires extended CRL support which is off by
2338 This work was sponsored by Google.
2341 *) Support for freshest CRL extension.
2343 This work was sponsored by Google.
2346 *) Initial indirect CRL support. Currently only supported in the CRLs
2347 passed directly and not via lookup. Process certificate issuer
2348 CRL entry extension and lookup CRL entries by bother issuer name
2349 and serial number. Check and process CRL issuer entry in IDP extension.
2351 This work was sponsored by Google.
2354 *) Add support for distinct certificate and CRL paths. The CRL issuer
2355 certificate is validated separately in this case. Only enabled if
2356 an extended CRL support flag is set: this flag will enable additional
2357 CRL functionality in future.
2359 This work was sponsored by Google.
2362 *) Add support for policy mappings extension.
2364 This work was sponsored by Google.
2367 *) Fixes to pathlength constraint, self issued certificate handling,
2368 policy processing to align with RFC3280 and PKITS tests.
2370 This work was sponsored by Google.
2373 *) Support for name constraints certificate extension. DN, email, DNS
2374 and URI types are currently supported.
2376 This work was sponsored by Google.
2379 *) To cater for systems that provide a pointer-based thread ID rather
2380 than numeric, deprecate the current numeric thread ID mechanism and
2381 replace it with a structure and associated callback type. This
2382 mechanism allows a numeric "hash" to be extracted from a thread ID in
2383 either case, and on platforms where pointers are larger than 'long',
2384 mixing is done to help ensure the numeric 'hash' is usable even if it
2385 can't be guaranteed unique. The default mechanism is to use "&errno"
2386 as a pointer-based thread ID to distinguish between threads.
2388 Applications that want to provide their own thread IDs should now use
2389 CRYPTO_THREADID_set_callback() to register a callback that will call
2390 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
2392 Note that ERR_remove_state() is now deprecated, because it is tied
2393 to the assumption that thread IDs are numeric. ERR_remove_state(0)
2394 to free the current thread's error state should be replaced by
2395 ERR_remove_thread_state(NULL).
2397 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
2398 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
2399 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
2400 application was previously providing a numeric thread callback that
2401 was inappropriate for distinguishing threads, then uniqueness might
2402 have been obtained with &errno that happened immediately in the
2403 intermediate development versions of OpenSSL; this is no longer the
2404 case, the numeric thread callback will now override the automatic use
2406 [Geoff Thorpe, with help from Bodo Moeller]
2408 *) Initial support for different CRL issuing certificates. This covers a
2409 simple case where the self issued certificates in the chain exist and
2410 the real CRL issuer is higher in the existing chain.
2412 This work was sponsored by Google.
2415 *) Removed effectively defunct crypto/store from the build.
2418 *) Revamp of STACK to provide stronger type-checking. Still to come:
2419 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
2420 ASN1_STRING, CONF_VALUE.
2423 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
2424 RAM on SSL connections. This option can save about 34k per idle SSL.
2427 *) Revamp of LHASH to provide stronger type-checking. Still to come:
2428 STACK, TXT_DB, bsearch, qsort.
2431 *) Initial support for Cryptographic Message Syntax (aka CMS) based
2432 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
2433 support for data, signedData, compressedData, digestedData and
2434 encryptedData, envelopedData types included. Scripts to check against
2435 RFC4134 examples draft and interop and consistency checks of many
2436 content types and variants.
2439 *) Add options to enc utility to support use of zlib compression BIO.
2442 *) Extend mk1mf to support importing of options and assembly language
2443 files from Configure script, currently only included in VC-WIN32.
2444 The assembly language rules can now optionally generate the source
2445 files from the associated perl scripts.
2448 *) Implement remaining functionality needed to support GOST ciphersuites.
2449 Interop testing has been performed using CryptoPro implementations.
2450 [Victor B. Wagner <vitus@cryptocom.ru>]
2452 *) s390x assembler pack.
2455 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
2459 *) Implement Opaque PRF Input TLS extension as specified in
2460 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
2461 official specification yet and no extension type assignment by
2462 IANA exists, this extension (for now) will have to be explicitly
2463 enabled when building OpenSSL by providing the extension number
2464 to use. For example, specify an option
2466 -DTLSEXT_TYPE_opaque_prf_input=0x9527
2468 to the "config" or "Configure" script to enable the extension,
2469 assuming extension number 0x9527 (which is a completely arbitrary
2470 and unofficial assignment based on the MD5 hash of the Internet
2471 Draft). Note that by doing so, you potentially lose
2472 interoperability with other TLS implementations since these might
2473 be using the same extension number for other purposes.
2475 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
2476 opaque PRF input value to use in the handshake. This will create
2477 an interal copy of the length-'len' string at 'src', and will
2478 return non-zero for success.
2480 To get more control and flexibility, provide a callback function
2483 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
2484 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
2488 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
2491 Callback function 'cb' will be called in handshakes, and is
2492 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
2493 Argument 'arg' is for application purposes (the value as given to
2494 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
2495 be provided to the callback function). The callback function
2496 has to return non-zero to report success: usually 1 to use opaque
2497 PRF input just if possible, or 2 to enforce use of the opaque PRF
2498 input. In the latter case, the library will abort the handshake
2499 if opaque PRF input is not successfully negotiated.
2501 Arguments 'peerinput' and 'len' given to the callback function
2502 will always be NULL and 0 in the case of a client. A server will
2503 see the client's opaque PRF input through these variables if
2504 available (NULL and 0 otherwise). Note that if the server
2505 provides an opaque PRF input, the length must be the same as the
2506 length of the client's opaque PRF input.
2508 Note that the callback function will only be called when creating
2509 a new session (session resumption can resume whatever was
2510 previously negotiated), and will not be called in SSL 2.0
2511 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
2512 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
2513 for applications that need to enforce opaque PRF input.
2517 *) Update ssl code to support digests other than SHA1+MD5 for handshake
2520 [Victor B. Wagner <vitus@cryptocom.ru>]
2522 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2523 RFC4507bis. The encrypted ticket format is an encrypted encoded
2524 SSL_SESSION structure, that way new session features are automatically
2527 If a client application caches session in an SSL_SESSION structure
2528 support is transparent because tickets are now stored in the encoded
2531 The SSL_CTX structure automatically generates keys for ticket
2532 protection in servers so again support should be possible
2533 with no application modification.
2535 If a client or server wishes to disable RFC4507 support then the option
2536 SSL_OP_NO_TICKET can be set.
2538 Add a TLS extension debugging callback to allow the contents of any client
2539 or server extensions to be examined.
2541 This work was sponsored by Google.
2544 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
2545 OpenSSL should now compile cleanly on gcc 4.2
2546 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
2548 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
2549 support including streaming MAC support: this is required for GOST
2550 ciphersuite support.
2551 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
2553 *) Add option -stream to use PKCS#7 streaming in smime utility. New
2554 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
2555 to output in BER and PEM format.
2558 *) Experimental support for use of HMAC via EVP_PKEY interface. This
2559 allows HMAC to be handled via the EVP_DigestSign*() interface. The
2560 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
2561 ENGINE support for HMAC keys which are unextractable. New -mac and
2562 -macopt options to dgst utility.
2565 *) New option -sigopt to dgst utility. Update dgst to use
2566 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
2567 alternative signing paramaters such as X9.31 or PSS in the dgst
2571 *) Change ssl_cipher_apply_rule(), the internal function that does
2572 the work each time a ciphersuite string requests enabling
2573 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
2574 removing ("!foo+bar") a class of ciphersuites: Now it maintains
2575 the order of disabled ciphersuites such that those ciphersuites
2576 that most recently went from enabled to disabled not only stay
2577 in order with respect to each other, but also have higher priority
2578 than other disabled ciphersuites the next time ciphersuites are
2581 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
2582 the same ciphersuites as with "HIGH" alone, but in a specific
2583 order where the PSK ciphersuites come first (since they are the
2584 most recently disabled ciphersuites when "HIGH" is parsed).
2586 Also, change ssl_create_cipher_list() (using this new
2587 funcionality) such that between otherwise identical
2588 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
2592 *) Change ssl_create_cipher_list() so that it automatically
2593 arranges the ciphersuites in reasonable order before starting
2594 to process the rule string. Thus, the definition for "DEFAULT"
2595 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
2596 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
2597 This makes it much easier to arrive at a reasonable default order
2598 in applications for which anonymous ciphers are OK (meaning
2599 that you can't actually use DEFAULT).
2600 [Bodo Moeller; suggested by Victor Duchovni]
2602 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
2603 processing) into multiple integers instead of setting
2604 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
2605 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
2606 (These masks as well as the individual bit definitions are hidden
2607 away into the non-exported interface ssl/ssl_locl.h, so this
2608 change to the definition of the SSL_CIPHER structure shouldn't
2609 affect applications.) This give us more bits for each of these
2610 categories, so there is no longer a need to coagulate AES128 and
2611 AES256 into a single algorithm bit, and to coagulate Camellia128
2612 and Camellia256 into a single algorithm bit, which has led to all
2615 Thus, among other things, the kludge introduced in 0.9.7m and
2616 0.9.8e for masking out AES256 independently of AES128 or masking
2617 out Camellia256 independently of AES256 is not needed here in 0.9.9.
2619 With the change, we also introduce new ciphersuite aliases that
2620 so far were missing: "AES128", "AES256", "CAMELLIA128", and
2624 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
2625 Use the leftmost N bytes of the signature input if the input is
2626 larger than the prime q (with N being the size in bytes of q).
2629 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
2630 it yet and it is largely untested.
2633 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
2636 *) Initial incomplete changes to avoid need for function casts in OpenSSL
2637 some compilers (gcc 4.2 and later) reject their use. Safestack is
2638 reimplemented. Update ASN1 to avoid use of legacy functions.
2641 *) Win32/64 targets are linked with Winsock2.
2644 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
2645 to external functions. This can be used to increase CRL handling
2646 efficiency especially when CRLs are very large by (for example) storing
2647 the CRL revoked certificates in a database.
2650 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
2651 new CRLs added to a directory can be used. New command line option
2652 -verify_return_error to s_client and s_server. This causes real errors
2653 to be returned by the verify callback instead of carrying on no matter
2654 what. This reflects the way a "real world" verify callback would behave.
2657 *) GOST engine, supporting several GOST algorithms and public key formats.
2658 Kindly donated by Cryptocom.
2661 *) Partial support for Issuing Distribution Point CRL extension. CRLs
2662 partitioned by DP are handled but no indirect CRL or reason partitioning
2663 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
2664 selected via a scoring technique which handles IDP and AKID in CRLs.
2667 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
2668 will ultimately be used for all verify operations: this will remove the
2669 X509_STORE dependency on certificate verification and allow alternative
2670 lookup methods. X509_STORE based implementations of these two callbacks.
2673 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
2674 Modify get_crl() to find a valid (unexpired) CRL if possible.
2677 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
2678 this would be called X509_CRL_cmp() but that name is already used by
2679 a function that just compares CRL issuer names. Cache several CRL
2680 extensions in X509_CRL structure and cache CRLDP in X509.
2683 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
2684 this maps equivalent X509_NAME structures into a consistent structure.
2685 Name comparison can then be performed rapidly using memcmp().
2688 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
2692 *) Allow digests to supply their own micalg string for S/MIME type using
2693 the ctrl EVP_MD_CTRL_MICALG.
2696 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
2697 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
2698 ctrl. It can then customise the structure before and/or after signing
2702 *) New function OBJ_add_sigid() to allow application defined signature OIDs
2703 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
2704 to free up any added signature OIDs.
2707 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
2708 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
2709 digest and cipher tables. New options added to openssl utility:
2710 list-message-digest-algorithms and list-cipher-algorithms.
2713 *) Change the array representation of binary polynomials: the list
2714 of degrees of non-zero coefficients is now terminated with -1.
2715 Previously it was terminated with 0, which was also part of the
2716 value; thus, the array representation was not applicable to
2717 polynomials where t^0 has coefficient zero. This change makes
2718 the array representation useful in a more general context.
2721 *) Various modifications and fixes to SSL/TLS cipher string
2722 handling. For ECC, the code now distinguishes between fixed ECDH
2723 with RSA certificates on the one hand and with ECDSA certificates
2724 on the other hand, since these are separate ciphersuites. The
2725 unused code for Fortezza ciphersuites has been removed.
2727 For consistency with EDH, ephemeral ECDH is now called "EECDH"
2728 (not "ECDHE"). For consistency with the code for DH
2729 certificates, use of ECDH certificates is now considered ECDH
2730 authentication, not RSA or ECDSA authentication (the latter is
2731 merely the CA's signing algorithm and not actively used in the
2734 The temporary ciphersuite alias "ECCdraft" is no longer
2735 available, and ECC ciphersuites are no longer excluded from "ALL"
2736 and "DEFAULT". The following aliases now exist for RFC 4492
2737 ciphersuites, most of these by analogy with the DH case:
2739 kECDHr - ECDH cert, signed with RSA
2740 kECDHe - ECDH cert, signed with ECDSA
2741 kECDH - ECDH cert (signed with either RSA or ECDSA)
2742 kEECDH - ephemeral ECDH
2743 ECDH - ECDH cert or ephemeral ECDH
2749 AECDH - anonymous ECDH
2750 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
2754 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
2755 Use correct micalg parameters depending on digest(s) in signed message.
2758 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
2759 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
2762 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
2763 an engine to register a method. Add ENGINE lookups for methods and
2764 functional reference processing.
2767 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
2768 EVP_{Sign,Verify}* which allow an application to customise the signature
2772 *) New -resign option to smime utility. This adds one or more signers
2773 to an existing PKCS#7 signedData structure. Also -md option to use an
2774 alternative message digest algorithm for signing.
2777 *) Tidy up PKCS#7 routines and add new functions to make it easier to
2778 create PKCS7 structures containing multiple signers. Update smime
2779 application to support multiple signers.
2782 *) New -macalg option to pkcs12 utility to allow setting of an alternative
2786 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
2787 Reorganize PBE internals to lookup from a static table using NIDs,
2788 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
2789 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
2790 PRF which will be automatically used with PBES2.
2793 *) Replace the algorithm specific calls to generate keys in "req" with the
2797 *) Update PKCS#7 enveloped data routines to use new API. This is now
2798 supported by any public key method supporting the encrypt operation. A
2799 ctrl is added to allow the public key algorithm to examine or modify
2800 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
2804 *) Add a ctrl to asn1 method to allow a public key algorithm to express
2805 a default digest type to use. In most cases this will be SHA1 but some
2806 algorithms (such as GOST) need to specify an alternative digest. The
2807 return value indicates how strong the preference is 1 means optional and
2808 2 is mandatory (that is it is the only supported type). Modify
2809 ASN1_item_sign() to accept a NULL digest argument to indicate it should
2810 use the default md. Update openssl utilities to use the default digest
2811 type for signing if it is not explicitly indicated.
2814 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
2815 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
2816 signing method from the key type. This effectively removes the link
2817 between digests and public key types.
2820 *) Add an OID cross reference table and utility functions. Its purpose is to
2821 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
2822 rsaEncryption. This will allow some of the algorithm specific hackery
2823 needed to use the correct OID to be removed.
2826 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
2827 structures for PKCS7_sign(). They are now set up by the relevant public
2831 *) Add provisional EC pkey method with support for ECDSA and ECDH.
2834 *) Add support for key derivation (agreement) in the API, DH method and
2838 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
2839 public and private key formats. As a side effect these add additional
2840 command line functionality not previously available: DSA signatures can be
2841 generated and verified using pkeyutl and DH key support and generation in
2846 [Oliver Tappe <zooey@hirschkaefer.de>]
2848 *) New make target "install_html_docs" installs HTML renditions of the
2850 [Oliver Tappe <zooey@hirschkaefer.de>]
2852 *) New utility "genpkey" this is analogous to "genrsa" etc except it can
2853 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
2854 support key and parameter generation and add initial key generation
2855 functionality for RSA.
2858 *) Add functions for main EVP_PKEY_method operations. The undocumented
2859 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
2860 EVP_PKEY_{encrypt,decrypt}_old.
2863 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
2864 key API, doesn't do much yet.
2867 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
2868 public key algorithms. New option to openssl utility:
2869 "list-public-key-algorithms" to print out info.
2872 *) Implement the Supported Elliptic Curves Extension for
2873 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2876 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
2877 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
2880 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
2881 utilities such as rsa, dsa, dsaparam etc except they process any key
2885 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
2886 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
2887 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
2891 *) Initial support for pluggable public key ASN1.
2892 De-spaghettify the public key ASN1 handling. Move public and private
2893 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
2894 algorithm specific handling to a single module within the relevant
2895 algorithm directory. Add functions to allow (near) opaque processing
2896 of public and private key structures.
2899 *) Implement the Supported Point Formats Extension for
2900 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2903 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
2904 for the psk identity [hint] and the psk callback functions to the
2905 SSL_SESSION, SSL and SSL_CTX structure.
2908 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
2912 SSL_CTX_use_psk_identity_hint
2913 SSL_get_psk_identity_hint
2914 SSL_get_psk_identity
2915 SSL_use_psk_identity_hint
2917 [Mika Kousa and Pasi Eronen of Nokia Corporation]
2919 *) Add RFC 3161 compliant time stamp request creation, response generation
2920 and response verification functionality.
2921 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
2923 *) Add initial support for TLS extensions, specifically for the server_name
2924 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2925 have new members for a host name. The SSL data structure has an
2926 additional member SSL_CTX *initial_ctx so that new sessions can be
2927 stored in that context to allow for session resumption, even after the
2928 SSL has been switched to a new SSL_CTX in reaction to a client's
2929 server_name extension.
2931 New functions (subject to change):
2933 SSL_get_servername()
2934 SSL_get_servername_type()
2937 New CTRL codes and macros (subject to change):
2939 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2940 - SSL_CTX_set_tlsext_servername_callback()
2941 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2942 - SSL_CTX_set_tlsext_servername_arg()
2943 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2945 openssl s_client has a new '-servername ...' option.
2947 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2948 '-key2 ...', '-servername_fatal' (subject to change). This allows
2949 testing the HostName extension for a specific single host name ('-cert'
2950 and '-key' remain fallbacks for handshakes without HostName
2951 negotiation). If the unrecognized_name alert has to be sent, this by
2952 default is a warning; it becomes fatal with the '-servername_fatal'
2955 [Peter Sylvester, Remy Allais, Christophe Renou]
2957 *) Whirlpool hash implementation is added.
2960 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
2961 bn(64,32). Because of instruction set limitations it doesn't have
2962 any negative impact on performance. This was done mostly in order
2963 to make it possible to share assembler modules, such as bn_mul_mont
2964 implementations, between 32- and 64-bit builds without hassle.
2967 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
2968 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
2972 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
2973 dedicated Montgomery multiplication procedure, is introduced.
2974 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
2975 "64-bit" performance on certain 32-bit targets.
2978 *) New option SSL_OP_NO_COMP to disable use of compression selectively
2979 in SSL structures. New SSL ctrl to set maximum send fragment size.
2980 Save memory by seeting the I/O buffer sizes dynamically instead of
2981 using the maximum available value.
2984 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
2985 in addition to the text details.
2988 *) Very, very preliminary EXPERIMENTAL support for printing of general
2989 ASN1 structures. This currently produces rather ugly output and doesn't
2990 handle several customised structures at all.
2993 *) Integrated support for PVK file format and some related formats such
2994 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
2995 these in the 'rsa' and 'dsa' utilities.
2998 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
3001 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
3002 place for the (very old) "NETSCAPE" format certificates which are now
3003 handled using new ASN1 code equivalents.
3006 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
3007 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
3008 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
3011 *) Modify CRL distribution points extension code to print out previously
3012 unsupported fields. Enhance extension setting code to allow setting of
3016 *) Add print and set support for Issuing Distribution Point CRL extension.
3019 *) Change 'Configure' script to enable Camellia by default.
3022 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
3024 *) When rejecting SSL/TLS records due to an incorrect version number, never
3025 update s->server with a new major version number. As of
3026 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
3027 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
3028 the previous behavior could result in a read attempt at NULL when
3029 receiving specific incorrect SSL/TLS records once record payload
3030 protection is active. (CVE-2010-0740)
3031 [Bodo Moeller, Adam Langley <agl@chromium.org>]
3033 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
3034 could be crashed if the relevant tables were not present (e.g. chrooted).
3035 [Tomas Hoger <thoger@redhat.com>]
3037 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
3039 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
3040 [Martin Olsson, Neel Mehta]
3042 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
3043 accommodate for stack sorting, always a write lock!).
3046 *) On some versions of WIN32 Heap32Next is very slow. This can cause
3047 excessive delays in the RAND_poll(): over a minute. As a workaround
3048 include a time check in the inner Heap32Next loop too.
3051 *) The code that handled flushing of data in SSL/TLS originally used the
3052 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
3053 the problem outlined in PR#1949. The fix suggested there however can
3054 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
3055 of Apache). So instead simplify the code to flush unconditionally.
3056 This should be fine since flushing with no data to flush is a no op.
3059 *) Handle TLS versions 2.0 and later properly and correctly use the
3060 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
3061 off ancient servers have a habit of sticking around for a while...
3064 *) Modify compression code so it frees up structures without using the
3065 ex_data callbacks. This works around a problem where some applications
3066 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
3067 restarting) then use compression (e.g. SSL with compression) later.
3068 This results in significant per-connection memory leaks and
3069 has caused some security issues including CVE-2008-1678 and
3073 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
3074 change when encrypting or decrypting.
3077 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
3078 connect and renegotiate with servers which do not support RI.
3079 Until RI is more widely deployed this option is enabled by default.
3082 *) Add "missing" ssl ctrls to clear options and mode.
3085 *) If client attempts to renegotiate and doesn't support RI respond with
3086 a no_renegotiation alert as required by RFC5746. Some renegotiating
3087 TLS clients will continue a connection gracefully when they receive
3088 the alert. Unfortunately OpenSSL mishandled this alert and would hang
3089 waiting for a server hello which it will never receive. Now we treat a
3090 received no_renegotiation alert as a fatal error. This is because
3091 applications requesting a renegotiation might well expect it to succeed
3092 and would have no code in place to handle the server denying it so the
3093 only safe thing to do is to terminate the connection.
3096 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
3097 peer supports secure renegotiation and 0 otherwise. Print out peer
3098 renegotiation support in s_client/s_server.
3101 *) Replace the highly broken and deprecated SPKAC certification method with
3102 the updated NID creation version. This should correctly handle UTF8.
3105 *) Implement RFC5746. Re-enable renegotiation but require the extension
3106 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
3107 turns out to be a bad idea. It has been replaced by
3108 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
3109 SSL_CTX_set_options(). This is really not recommended unless you
3110 know what you are doing.
3111 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
3113 *) Fixes to stateless session resumption handling. Use initial_ctx when
3114 issuing and attempting to decrypt tickets in case it has changed during
3115 servername handling. Use a non-zero length session ID when attempting
3116 stateless session resumption: this makes it possible to determine if
3117 a resumption has occurred immediately after receiving server hello
3118 (several places in OpenSSL subtly assume this) instead of later in
3122 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
3123 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
3124 fixes for a few places where the return code is not checked
3126 [Julia Lawall <julia@diku.dk>]
3128 *) Add --strict-warnings option to Configure script to include devteam
3129 warnings in other configurations.
3132 *) Add support for --libdir option and LIBDIR variable in makefiles. This
3133 makes it possible to install openssl libraries in locations which
3134 have names other than "lib", for example "/usr/lib64" which some
3136 [Steve Henson, based on patch from Jeremy Utley]
3138 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
3139 X690 8.9.12 and can produce some misleading textual output of OIDs.
3140 [Steve Henson, reported by Dan Kaminsky]
3142 *) Delete MD2 from algorithm tables. This follows the recommendation in
3143 several standards that it is not used in new applications due to
3144 several cryptographic weaknesses. For binary compatibility reasons
3145 the MD2 API is still compiled in by default.
3148 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
3152 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
3153 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
3155 [Guenter <lists@gknw.net>]
3157 *) Fix the server certificate chain building code to use X509_verify_cert(),
3158 it used to have an ad-hoc builder which was unable to cope with anything
3159 other than a simple chain.
3160 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
3162 *) Don't check self signed certificate signatures in X509_verify_cert()
3163 by default (a flag can override this): it just wastes time without
3164 adding any security. As a useful side effect self signed root CAs
3165 with non-FIPS digests are now usable in FIPS mode.
3168 *) In dtls1_process_out_of_seq_message() the check if the current message
3169 is already buffered was missing. For every new message was memory
3170 allocated, allowing an attacker to perform an denial of service attack
3171 with sending out of seq handshake messages until there is no memory
3172 left. Additionally every future messege was buffered, even if the
3173 sequence number made no sense and would be part of another handshake.
3174 So only messages with sequence numbers less than 10 in advance will be
3175 buffered. (CVE-2009-1378)
3176 [Robin Seggelmann, discovered by Daniel Mentz]
3178 *) Records are buffered if they arrive with a future epoch to be
3179 processed after finishing the corresponding handshake. There is
3180 currently no limitation to this buffer allowing an attacker to perform
3181 a DOS attack with sending records with future epochs until there is no
3182 memory left. This patch adds the pqueue_size() function to determine
3183 the size of a buffer and limits the record buffer to 100 entries.
3185 [Robin Seggelmann, discovered by Daniel Mentz]
3187 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
3188 parent structure is freed. (CVE-2009-1379)
3191 *) Handle non-blocking I/O properly in SSL_shutdown() call.
3192 [Darryl Miles <darryl-mailinglists@netbauds.net>]
3195 [Ilya O. <vrghost@gmail.com>]
3197 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
3199 *) Disable renegotiation completely - this fixes a severe security
3200 problem (CVE-2009-3555) at the cost of breaking all
3201 renegotiation. Renegotiation can be re-enabled by setting
3202 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
3203 run-time. This is really not recommended unless you know what
3207 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
3209 *) Don't set val to NULL when freeing up structures, it is freed up by
3210 underlying code. If sizeof(void *) > sizeof(long) this can result in
3211 zeroing past the valid field. (CVE-2009-0789)
3212 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
3214 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
3215 checked correctly. This would allow some invalid signed attributes to
3216 appear to verify correctly. (CVE-2009-0591)
3217 [Ivan Nestlerode <inestlerode@us.ibm.com>]
3219 *) Reject UniversalString and BMPString types with invalid lengths. This
3220 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
3221 a legal length. (CVE-2009-0590)
3224 *) Set S/MIME signing as the default purpose rather than setting it
3225 unconditionally. This allows applications to override it at the store
3229 *) Permit restricted recursion of ASN1 strings. This is needed in practice
3230 to handle some structures.
3233 *) Improve efficiency of mem_gets: don't search whole buffer each time
3235 [Jeremy Shapiro <jnshapir@us.ibm.com>]
3237 *) New -hex option for openssl rand.
3240 *) Print out UTF8String and NumericString when parsing ASN1.
3243 *) Support NumericString type for name components.
3246 *) Allow CC in the environment to override the automatically chosen
3247 compiler. Note that nothing is done to ensure flags work with the
3251 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
3253 *) Properly check EVP_VerifyFinal() and similar return values
3255 [Ben Laurie, Bodo Moeller, Google Security Team]
3257 *) Enable TLS extensions by default.
3260 *) Allow the CHIL engine to be loaded, whether the application is
3261 multithreaded or not. (This does not release the developer from the
3262 obligation to set up the dynamic locking callbacks.)
3263 [Sander Temme <sander@temme.net>]
3265 *) Use correct exit code if there is an error in dgst command.
3266 [Steve Henson; problem pointed out by Roland Dirlewanger]
3268 *) Tweak Configure so that you need to say "experimental-jpake" to enable
3269 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
3272 *) Add experimental JPAKE support, including demo authentication in
3273 s_client and s_server.
3276 *) Set the comparison function in v3_addr_canonize().
3277 [Rob Austein <sra@hactrn.net>]
3279 *) Add support for XMPP STARTTLS in s_client.
3280 [Philip Paeps <philip@freebsd.org>]
3282 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
3283 to ensure that even with this option, only ciphersuites in the
3284 server's preference list will be accepted. (Note that the option
3285 applies only when resuming a session, so the earlier behavior was
3286 just about the algorithm choice for symmetric cryptography.)
3289 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
3291 *) Fix NULL pointer dereference if a DTLS server received
3292 ChangeCipherSpec as first record (CVE-2009-1386).
3295 *) Fix a state transition in s3_srvr.c and d1_srvr.c
3296 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
3299 *) The fix in 0.9.8c that supposedly got rid of unsafe
3300 double-checked locking was incomplete for RSA blinding,
3301 addressing just one layer of what turns out to have been
3302 doubly unsafe triple-checked locking.
3304 So now fix this for real by retiring the MONT_HELPER macro
3305 in crypto/rsa/rsa_eay.c.
3307 [Bodo Moeller; problem pointed out by Marius Schilder]
3309 *) Various precautionary measures:
3311 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
3313 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
3314 (NB: This would require knowledge of the secret session ticket key
3315 to exploit, in which case you'd be SOL either way.)
3317 - Change bn_nist.c so that it will properly handle input BIGNUMs
3318 outside the expected range.
3320 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
3323 [Neel Mehta, Bodo Moeller]
3325 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
3326 the load fails. Useful for distros.
3327 [Ben Laurie and the FreeBSD team]
3329 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
3332 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
3335 *) Expand ENGINE to support engine supplied SSL client certificate functions.
3337 This work was sponsored by Logica.
3340 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
3341 keystores. Support for SSL/TLS client authentication too.
3342 Not compiled unless enable-capieng specified to Configure.
3344 This work was sponsored by Logica.
3347 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
3348 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
3349 attribute creation routines such as certifcate requests and PKCS#12
3353 Changes between 0.9.8g and 0.9.8h [28 May 2008]
3355 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
3356 handshake which could lead to a cilent crash as found using the
3357 Codenomicon TLS test suite (CVE-2008-1672)
3358 [Steve Henson, Mark Cox]
3360 *) Fix double free in TLS server name extensions which could lead to
3361 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
3364 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
3366 Clear the error queue to ensure that error entries left from
3367 older function calls do not interfere with the correct operation.
3368 [Lutz Jaenicke, Erik de Castro Lopo]
3370 *) Remove root CA certificates of commercial CAs:
3372 The OpenSSL project does not recommend any specific CA and does not
3373 have any policy with respect to including or excluding any CA.
3374 Therefore it does not make any sense to ship an arbitrary selection
3375 of root CA certificates with the OpenSSL software.
3378 *) RSA OAEP patches to fix two separate invalid memory reads.
3379 The first one involves inputs when 'lzero' is greater than
3380 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
3381 before the beginning of from). The second one involves inputs where
3382 the 'db' section contains nothing but zeroes (there is a one-byte
3383 invalid read after the end of 'db').
3384 [Ivan Nestlerode <inestlerode@us.ibm.com>]
3386 *) Partial backport from 0.9.9-dev:
3388 Introduce bn_mul_mont (dedicated Montgomery multiplication
3389 procedure) as a candidate for BIGNUM assembler implementation.
3390 While 0.9.9-dev uses assembler for various architectures, only
3391 x86_64 is available by default here in the 0.9.8 branch, and
3392 32-bit x86 is available through a compile-time setting.
3394 To try the 32-bit x86 assembler implementation, use Configure
3395 option "enable-montasm" (which exists only for this backport).
3397 As "enable-montasm" for 32-bit x86 disclaims code stability
3398 anyway, in this constellation we activate additional code
3399 backported from 0.9.9-dev for further performance improvements,
3400 namely BN_from_montgomery_word. (To enable this otherwise,
3401 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
3403 [Andy Polyakov (backport partially by Bodo Moeller)]
3405 *) Add TLS session ticket callback. This allows an application to set
3406 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
3407 values. This is useful for key rollover for example where several key
3408 sets may exist with different names.
3411 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
3412 This was broken until now in 0.9.8 releases, such that the only way
3413 a registered ENGINE could be used (assuming it initialises
3414 successfully on the host) was to explicitly set it as the default
3415 for the relevant algorithms. This is in contradiction with 0.9.7
3416 behaviour and the documentation. With this fix, when an ENGINE is
3417 registered into a given algorithm's table of implementations, the
3418 'uptodate' flag is reset so that auto-discovery will be used next
3419 time a new context for that algorithm attempts to select an
3421 [Ian Lister (tweaked by Geoff Thorpe)]
3423 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
3424 implemention in the following ways:
3426 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
3429 Lack of BER streaming support means one pass streaming processing is
3430 only supported if data is detached: setting the streaming flag is
3431 ignored for embedded content.
3433 CMS support is disabled by default and must be explicitly enabled
3434 with the enable-cms configuration option.
3437 *) Update the GMP engine glue to do direct copies between BIGNUM and
3438 mpz_t when openssl and GMP use the same limb size. Otherwise the
3439 existing "conversion via a text string export" trick is still used.
3440 [Paul Sheer <paulsheer@gmail.com>]
3442 *) Zlib compression BIO. This is a filter BIO which compressed and
3443 uncompresses any data passed through it.
3446 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
3447 RFC3394 compatible AES key wrapping.
3450 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
3451 sets string data without copying. X509_ALGOR_set0() and
3452 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
3453 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
3454 from an X509_ATTRIBUTE structure optionally checking it occurs only
3455 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
3459 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
3460 to get the expected BN_FLG_CONSTTIME behavior.
3461 [Bodo Moeller (Google)]
3465 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
3466 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
3467 - added some more tests to do_tests.pl
3468 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
3469 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
3470 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
3471 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
3472 - various changes to netware.pl to enable gcc-cross builds on Win32
3474 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
3475 - various changes to fix missing prototype warnings
3476 - fixed x86nasm.pl to create correct asm files for NASM COFF output
3477 - added AES, WHIRLPOOL and CPUID assembler code to build files
3478 - added missing AES assembler make rules to mk1mf.pl
3479 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
3480 [Guenter Knauf <eflash@gmx.net>]
3482 *) Implement certificate status request TLS extension defined in RFC3546.
3483 A client can set the appropriate parameters and receive the encoded
3484 OCSP response via a callback. A server can query the supplied parameters
3485 and set the encoded OCSP response in the callback. Add simplified examples
3486 to s_client and s_server.
3489 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
3491 *) Fix various bugs:
3492 + Binary incompatibility of ssl_ctx_st structure
3493 + DTLS interoperation with non-compliant servers
3494 + Don't call get_session_cb() without proposed session
3495 + Fix ia64 assembler code
3496 [Andy Polyakov, Steve Henson]
3498 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
3500 *) DTLS Handshake overhaul. There were longstanding issues with
3501 OpenSSL DTLS implementation, which were making it impossible for
3502 RFC 4347 compliant client to communicate with OpenSSL server.
3503 Unfortunately just fixing these incompatibilities would "cut off"
3504 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
3505 server keeps tolerating non RFC compliant syntax. The opposite is
3506 not true, 0.9.8f client can not communicate with earlier server.
3507 This update even addresses CVE-2007-4995.
3510 *) Changes to avoid need for function casts in OpenSSL: some compilers
3511 (gcc 4.2 and later) reject their use.
3512 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
3515 *) Add RFC4507 support to OpenSSL. This includes the corrections in
3516 RFC4507bis. The encrypted ticket format is an encrypted encoded
3517 SSL_SESSION structure, that way new session features are automatically
3520 If a client application caches session in an SSL_SESSION structure
3521 support is transparent because tickets are now stored in the encoded
3524 The SSL_CTX structure automatically generates keys for ticket
3525 protection in servers so again support should be possible
3526 with no application modification.
3528 If a client or server wishes to disable RFC4507 support then the option
3529 SSL_OP_NO_TICKET can be set.
3531 Add a TLS extension debugging callback to allow the contents of any client
3532 or server extensions to be examined.
3534 This work was sponsored by Google.
3537 *) Add initial support for TLS extensions, specifically for the server_name
3538 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
3539 have new members for a host name. The SSL data structure has an
3540 additional member SSL_CTX *initial_ctx so that new sessions can be
3541 stored in that context to allow for session resumption, even after the
3542 SSL has been switched to a new SSL_CTX in reaction to a client's
3543 server_name extension.
3545 New functions (subject to change):
3547 SSL_get_servername()
3548 SSL_get_servername_type()
3551 New CTRL codes and macros (subject to change):
3553 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
3554 - SSL_CTX_set_tlsext_servername_callback()
3555 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
3556 - SSL_CTX_set_tlsext_servername_arg()
3557 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
3559 openssl s_client has a new '-servername ...' option.
3561 openssl s_server has new options '-servername_host ...', '-cert2 ...',
3562 '-key2 ...', '-servername_fatal' (subject to change). This allows
3563 testing the HostName extension for a specific single host name ('-cert'
3564 and '-key' remain fallbacks for handshakes without HostName
3565 negotiation). If the unrecognized_name alert has to be sent, this by
3566 default is a warning; it becomes fatal with the '-servername_fatal'
3569 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
3571 *) Add AES and SSE2 assembly language support to VC++ build.
3574 *) Mitigate attack on final subtraction in Montgomery reduction.
3577 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
3578 (which previously caused an internal error).
3581 *) Squeeze another 10% out of IGE mode when in != out.
3584 *) AES IGE mode speedup.
3585 [Dean Gaudet (Google)]
3587 *) Add the Korean symmetric 128-bit cipher SEED (see
3588 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
3589 add SEED ciphersuites from RFC 4162:
3591 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
3592 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
3593 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
3594 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
3596 To minimize changes between patchlevels in the OpenSSL 0.9.8
3597 series, SEED remains excluded from compilation unless OpenSSL
3598 is configured with 'enable-seed'.
3599 [KISA, Bodo Moeller]
3601 *) Mitigate branch prediction attacks, which can be practical if a
3602 single processor is shared, allowing a spy process to extract
3603 information. For detailed background information, see
3604 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
3605 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
3606 and Necessary Software Countermeasures"). The core of the change
3607 are new versions BN_div_no_branch() and
3608 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
3609 respectively, which are slower, but avoid the security-relevant
3610 conditional branches. These are automatically called by BN_div()
3611 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
3612 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
3613 remove a conditional branch.
3615 BN_FLG_CONSTTIME is the new name for the previous
3616 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
3617 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
3618 in the exponent causes BN_mod_exp_mont() to use the alternative
3619 implementation in BN_mod_exp_mont_consttime().) The old name
3620 remains as a deprecated alias.
3622 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
3623 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
3624 constant-time implementations for more than just exponentiation.
3625 Here too the old name is kept as a deprecated alias.
3627 BN_BLINDING_new() will now use BN_dup() for the modulus so that
3628 the BN_BLINDING structure gets an independent copy of the
3629 modulus. This means that the previous "BIGNUM *m" argument to
3630 BN_BLINDING_new() and to BN_BLINDING_create_param() now
3631 essentially becomes "const BIGNUM *m", although we can't actually
3632 change this in the header file before 0.9.9. It allows
3633 RSA_setup_blinding() to use BN_with_flags() on the modulus to
3634 enable BN_FLG_CONSTTIME.
3636 [Matthew D Wood (Intel Corp)]
3638 *) In the SSL/TLS server implementation, be strict about session ID
3639 context matching (which matters if an application uses a single
3640 external cache for different purposes). Previously,
3641 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
3642 set. This did ensure strict client verification, but meant that,
3643 with applications using a single external cache for quite
3644 different requirements, clients could circumvent ciphersuite
3645 restrictions for a given session ID context by starting a session
3646 in a different context.
3649 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3650 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3651 authentication-only ciphersuites.
3654 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
3655 not complete and could lead to a possible single byte overflow
3656 (CVE-2007-5135) [Ben Laurie]
3658 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
3660 *) Since AES128 and AES256 (and similarly Camellia128 and
3661 Camellia256) share a single mask bit in the logic of
3662 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3663 kludge to work properly if AES128 is available and AES256 isn't
3664 (or if Camellia128 is available and Camellia256 isn't).
3667 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
3668 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
3669 When a point or a seed is encoded in a BIT STRING, we need to
3670 prevent the removal of trailing zero bits to get the proper DER
3671 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
3672 of a NamedBitList, for which trailing 0 bits need to be removed.)
3675 *) Have SSL/TLS server implementation tolerate "mismatched" record
3676 protocol version while receiving ClientHello even if the
3677 ClientHello is fragmented. (The server can't insist on the
3678 particular protocol version it has chosen before the ServerHello
3679 message has informed the client about his choice.)
3682 *) Add RFC 3779 support.
3683 [Rob Austein for ARIN, Ben Laurie]
3685 *) Load error codes if they are not already present instead of using a
3686 static variable. This allows them to be cleanly unloaded and reloaded.
3687 Improve header file function name parsing.
3690 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
3691 or CAPABILITY handshake as required by RFCs.
3694 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
3696 *) Introduce limits to prevent malicious keys being able to
3697 cause a denial of service. (CVE-2006-2940)
3698 [Steve Henson, Bodo Moeller]
3700 *) Fix ASN.1 parsing of certain invalid structures that can result
3701 in a denial of service. (CVE-2006-2937) [Steve Henson]
3703 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3704 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3706 *) Fix SSL client code which could crash if connecting to a
3707 malicious SSLv2 server. (CVE-2006-4343)
3708 [Tavis Ormandy and Will Drewry, Google Security Team]
3710 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
3711 match only those. Before that, "AES256-SHA" would be interpreted
3712 as a pattern and match "AES128-SHA" too (since AES128-SHA got
3713 the same strength classification in 0.9.7h) as we currently only
3714 have a single AES bit in the ciphersuite description bitmap.
3715 That change, however, also applied to ciphersuite strings such as
3716 "RC4-MD5" that intentionally matched multiple ciphersuites --
3717 namely, SSL 2.0 ciphersuites in addition to the more common ones
3718 from SSL 3.0/TLS 1.0.
3720 So we change the selection algorithm again: Naming an explicit
3721 ciphersuite selects this one ciphersuite, and any other similar
3722 ciphersuite (same bitmap) from *other* protocol versions.
3723 Thus, "RC4-MD5" again will properly select both the SSL 2.0
3724 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
3726 Since SSL 2.0 does not have any ciphersuites for which the
3727 128/256 bit distinction would be relevant, this works for now.
3728 The proper fix will be to use different bits for AES128 and
3729 AES256, which would have avoided the problems from the beginning;
3730 however, bits are scarce, so we can only do this in a new release
3731 (not just a patchlevel) when we can change the SSL_CIPHER
3732 definition to split the single 'unsigned long mask' bitmap into
3733 multiple values to extend the available space.
3737 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
3739 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3740 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3742 *) Add AES IGE and biIGE modes.
3745 *) Change the Unix randomness entropy gathering to use poll() when
3746 possible instead of select(), since the latter has some
3747 undesirable limitations.
3748 [Darryl Miles via Richard Levitte and Bodo Moeller]
3750 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
3751 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
3752 cannot be implicitly activated as part of, e.g., the "AES" alias.
3753 However, please upgrade to OpenSSL 0.9.9[-dev] for
3754 non-experimental use of the ECC ciphersuites to get TLS extension
3755 support, which is required for curve and point format negotiation
3756 to avoid potential handshake problems.
3759 *) Disable rogue ciphersuites:
3761 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3762 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3763 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3765 The latter two were purportedly from
3766 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3769 Also deactivate the remaining ciphersuites from
3770 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3771 unofficial, and the ID has long expired.
3774 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3775 dual-core machines) and other potential thread-safety issues.
3778 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
3779 versions), which is now available for royalty-free use
3780 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
3781 Also, add Camellia TLS ciphersuites from RFC 4132.
3783 To minimize changes between patchlevels in the OpenSSL 0.9.8
3784 series, Camellia remains excluded from compilation unless OpenSSL
3785 is configured with 'enable-camellia'.
3788 *) Disable the padding bug check when compression is in use. The padding
3789 bug check assumes the first packet is of even length, this is not
3790 necessarily true if compresssion is enabled and can result in false
3791 positives causing handshake failure. The actual bug test is ancient
3792 code so it is hoped that implementations will either have fixed it by
3793 now or any which still have the bug do not support compression.
3796 Changes between 0.9.8a and 0.9.8b [04 May 2006]
3798 *) When applying a cipher rule check to see if string match is an explicit
3799 cipher suite and only match that one cipher suite if it is.
3802 *) Link in manifests for VC++ if needed.
3803 [Austin Ziegler <halostatue@gmail.com>]
3805 *) Update support for ECC-based TLS ciphersuites according to
3806 draft-ietf-tls-ecc-12.txt with proposed changes (but without
3807 TLS extensions, which are supported starting with the 0.9.9
3808 branch, not in the OpenSSL 0.9.8 branch).
3811 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
3812 opaque EVP_CIPHER_CTX handling.
3815 *) Fixes and enhancements to zlib compression code. We now only use
3816 "zlib1.dll" and use the default __cdecl calling convention on Win32
3817 to conform with the standards mentioned here:
3818 http://www.zlib.net/DLL_FAQ.txt
3819 Static zlib linking now works on Windows and the new --with-zlib-include
3820 --with-zlib-lib options to Configure can be used to supply the location
3821 of the headers and library. Gracefully handle case where zlib library
3825 *) Several fixes and enhancements to the OID generation code. The old code
3826 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
3827 handle numbers larger than ULONG_MAX, truncated printing and had a
3828 non standard OBJ_obj2txt() behaviour.
3831 *) Add support for building of engines under engine/ as shared libraries
3832 under VC++ build system.
3835 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
3836 Hopefully, we will not see any false combination of paths any more.
3839 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
3841 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3842 (part of SSL_OP_ALL). This option used to disable the
3843 countermeasure against man-in-the-middle protocol-version
3844 rollback in the SSL 2.0 server implementation, which is a bad
3845 idea. (CVE-2005-2969)
3847 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3848 for Information Security, National Institute of Advanced Industrial
3849 Science and Technology [AIST], Japan)]
3851 *) Add two function to clear and return the verify parameter flags.
3854 *) Keep cipherlists sorted in the source instead of sorting them at
3855 runtime, thus removing the need for a lock.
3858 *) Avoid some small subgroup attacks in Diffie-Hellman.
3859 [Nick Mathewson and Ben Laurie]
3861 *) Add functions for well-known primes.
3864 *) Extended Windows CE support.
3865 [Satoshi Nakamura and Andy Polyakov]
3867 *) Initialize SSL_METHOD structures at compile time instead of during
3868 runtime, thus removing the need for a lock.
3871 *) Make PKCS7_decrypt() work even if no certificate is supplied by
3872 attempting to decrypt each encrypted key in turn. Add support to
3876 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
3878 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
3881 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
3884 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
3885 key into the same file any more.
3888 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
3891 *) Add -utf8 command line and config file option to 'ca'.
3892 [Stefan <stf@udoma.org]
3894 *) Removed the macro des_crypt(), as it seems to conflict with some
3895 libraries. Use DES_crypt().
3898 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
3899 involves renaming the source and generated shared-libs for
3900 both. The engines will accept the corrected or legacy ids
3901 ('ncipher' and '4758_cca' respectively) when binding. NB,
3902 this only applies when building 'shared'.
3903 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
3905 *) Add attribute functions to EVP_PKEY structure. Modify
3906 PKCS12_create() to recognize a CSP name attribute and
3907 use it. Make -CSP option work again in pkcs12 utility.
3910 *) Add new functionality to the bn blinding code:
3911 - automatic re-creation of the BN_BLINDING parameters after
3912 a fixed number of uses (currently 32)
3913 - add new function for parameter creation
3914 - introduce flags to control the update behaviour of the
3915 BN_BLINDING parameters
3916 - hide BN_BLINDING structure
3917 Add a second BN_BLINDING slot to the RSA structure to improve
3918 performance when a single RSA object is shared among several
3922 *) Add support for DTLS.
3923 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
3925 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
3926 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
3929 *) Remove buggy and incomplete DH cert support from
3930 ssl/ssl_rsa.c and ssl/s3_both.c
3933 *) Use SHA-1 instead of MD5 as the default digest algorithm for
3934 the apps/openssl applications.
3937 *) Compile clean with "-Wall -Wmissing-prototypes
3938 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
3939 DEBUG_SAFESTACK must also be set.
3942 *) Change ./Configure so that certain algorithms can be disabled by default.
3943 The new counterpiece to "no-xxx" is "enable-xxx".
3945 The patented RC5 and MDC2 algorithms will now be disabled unless
3946 "enable-rc5" and "enable-mdc2", respectively, are specified.
3948 (IDEA remains enabled despite being patented. This is because IDEA
3949 is frequently required for interoperability, and there is no license
3950 fee for non-commercial use. As before, "no-idea" can be used to
3951 avoid this algorithm.)
3955 *) Add processing of proxy certificates (see RFC 3820). This work was
3956 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
3957 EGEE (Enabling Grids for E-science in Europe).
3960 *) RC4 performance overhaul on modern architectures/implementations, such
3961 as Intel P4, IA-64 and AMD64.
3964 *) New utility extract-section.pl. This can be used specify an alternative
3965 section number in a pod file instead of having to treat each file as
3966 a separate case in Makefile. This can be done by adding two lines to the
3969 =for comment openssl_section:XXX
3971 The blank line is mandatory.
3975 *) New arguments -certform, -keyform and -pass for s_client and s_server
3976 to allow alternative format key and certificate files and passphrase
3980 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
3981 update associated structures and add various utility functions.
3983 Add new policy related verify parameters, include policy checking in
3984 standard verify code. Enhance 'smime' application with extra parameters
3985 to support policy checking and print out.
3988 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
3989 Nehemiah processors. These extensions support AES encryption in hardware
3990 as well as RNG (though RNG support is currently disabled).
3991 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
3993 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
3996 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
3997 [Andy Polyakov and a number of other people]
3999 *) Improved PowerPC platform support. Most notably BIGNUM assembler
4000 implementation contributed by IBM.
4001 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
4003 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
4004 exponent rather than 'unsigned long'. There is a corresponding change to
4005 the new 'rsa_keygen' element of the RSA_METHOD structure.
4006 [Jelte Jansen, Geoff Thorpe]
4008 *) Functionality for creating the initial serial number file is now
4009 moved from CA.pl to the 'ca' utility with a new option -create_serial.
4011 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
4012 number file to 1, which is bound to cause problems. To avoid
4013 the problems while respecting compatibility between different 0.9.7
4014 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
4015 CA.pl for serial number initialization. With the new release 0.9.8,
4016 we can fix the problem directly in the 'ca' utility.)
4019 *) Reduced header interdepencies by declaring more opaque objects in
4020 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
4021 give fewer recursive includes, which could break lazy source code - so
4022 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
4023 developers should define this symbol when building and using openssl to
4024 ensure they track the recommended behaviour, interfaces, [etc], but
4025 backwards-compatible behaviour prevails when this isn't defined.
4028 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
4031 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
4032 This will generate a random key of the appropriate length based on the
4033 cipher context. The EVP_CIPHER can provide its own random key generation
4034 routine to support keys of a specific form. This is used in the des and
4035 3des routines to generate a key of the correct parity. Update S/MIME
4036 code to use new functions and hence generate correct parity DES keys.
4037 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
4038 valid (weak or incorrect parity).
4041 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
4042 as looking them up. This is useful when the verified structure may contain
4043 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
4044 present unless the new PKCS7_NO_CRL flag is asserted.
4047 *) Extend ASN1 oid configuration module. It now additionally accepts the
4050 shortName = some long name, 1.2.3.4
4053 *) Reimplemented the BN_CTX implementation. There is now no more static
4054 limitation on the number of variables it can handle nor the depth of the
4055 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
4056 information can now expand as required, and rather than having a single
4057 static array of bignums, BN_CTX now uses a linked-list of such arrays
4058 allowing it to expand on demand whilst maintaining the usefulness of
4059 BN_CTX's "bundling".
4062 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
4063 to allow all RSA operations to function using a single BN_CTX.
4066 *) Preliminary support for certificate policy evaluation and checking. This
4067 is initially intended to pass the tests outlined in "Conformance Testing
4068 of Relying Party Client Certificate Path Processing Logic" v1.07.
4071 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
4072 remained unused and not that useful. A variety of other little bignum
4073 tweaks and fixes have also been made continuing on from the audit (see
4077 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
4078 associated ASN1, EVP and SSL functions and old ASN1 macros.
4081 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
4082 and this should never fail. So the return value from the use of
4083 BN_set_word() (which can fail due to needless expansion) is now deprecated;
4084 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
4087 *) BN_CTX_get() should return zero-valued bignums, providing the same
4088 initialised value as BN_new().
4089 [Geoff Thorpe, suggested by Ulf Möller]
4091 *) Support for inhibitAnyPolicy certificate extension.
4094 *) An audit of the BIGNUM code is underway, for which debugging code is
4095 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
4096 is considered valid when processing BIGNUMs, and causes execution to
4097 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
4098 further steps are taken to deliberately pollute unused data in BIGNUM
4099 structures to try and expose faulty code further on. For now, openssl will
4100 (in its default mode of operation) continue to tolerate the inconsistent
4101 forms that it has tolerated in the past, but authors and packagers should
4102 consider trying openssl and their own applications when compiled with
4103 these debugging symbols defined. It will help highlight potential bugs in
4104 their own code, and will improve the test coverage for OpenSSL itself. At
4105 some point, these tighter rules will become openssl's default to improve
4106 maintainability, though the assert()s and other overheads will remain only
4107 in debugging configurations. See bn.h for more details.
4108 [Geoff Thorpe, Nils Larsch, Ulf Möller]
4110 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
4111 that can only be obtained through BN_CTX_new() (which implicitly
4112 initialises it). The presence of this function only made it possible
4113 to overwrite an existing structure (and cause memory leaks).
4116 *) Because of the callback-based approach for implementing LHASH as a
4117 template type, lh_insert() adds opaque objects to hash-tables and
4118 lh_doall() or lh_doall_arg() are typically used with a destructor callback
4119 to clean up those corresponding objects before destroying the hash table
4120 (and losing the object pointers). So some over-zealous constifications in
4121 LHASH have been relaxed so that lh_insert() does not take (nor store) the
4122 objects as "const" and the lh_doall[_arg] callback wrappers are not
4123 prototyped to have "const" restrictions on the object pointers they are
4124 given (and so aren't required to cast them away any more).
4127 *) The tmdiff.h API was so ugly and minimal that our own timing utility
4128 (speed) prefers to use its own implementation. The two implementations
4129 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
4130 its object type properly exposed (MS_TM) instead of casting to/from "char
4131 *". This may still change yet if someone realises MS_TM and "ms_time_***"
4132 aren't necessarily the greatest nomenclatures - but this is what was used
4133 internally to the implementation so I've used that for now.
4136 *) Ensure that deprecated functions do not get compiled when
4137 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
4138 the self-tests were still using deprecated key-generation functions so
4139 these have been updated also.
4142 *) Reorganise PKCS#7 code to separate the digest location functionality
4143 into PKCS7_find_digest(), digest addition into PKCS7_bio_add_digest().
4144 New function PKCS7_set_digest() to set the digest type for PKCS#7
4145 digestedData type. Add additional code to correctly generate the
4146 digestedData type and add support for this type in PKCS7 initialization
4150 *) New function PKCS7_set0_type_other() this initializes a PKCS7
4151 structure of type "other".
4154 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
4155 sure the loop does correctly stop and breaking ("division by zero")
4156 modulus operations are not performed. The (pre-generated) prime
4157 table crypto/bn/bn_prime.h was already correct, but it could not be
4158 re-generated on some platforms because of the "division by zero"
4159 situation in the script.
4160 [Ralf S. Engelschall]
4162 *) Update support for ECC-based TLS ciphersuites according to
4163 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
4164 SHA-1 now is only used for "small" curves (where the
4165 representation of a field element takes up to 24 bytes); for
4166 larger curves, the field element resulting from ECDH is directly
4167 used as premaster secret.
4168 [Douglas Stebila (Sun Microsystems Laboratories)]
4170 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
4171 curve secp160r1 to the tests.
4172 [Douglas Stebila (Sun Microsystems Laboratories)]
4174 *) Add the possibility to load symbols globally with DSO.
4175 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
4177 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
4178 control of the error stack.
4181 *) Add support for STORE in ENGINE.
4184 *) Add the STORE type. The intention is to provide a common interface
4185 to certificate and key stores, be they simple file-based stores, or
4186 HSM-type store, or LDAP stores, or...
4187 NOTE: The code is currently UNTESTED and isn't really used anywhere.
4190 *) Add a generic structure called OPENSSL_ITEM. This can be used to
4191 pass a list of arguments to any function as well as provide a way
4192 for a function to pass data back to the caller.
4195 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
4196 works like BUF_strdup() but can be used to duplicate a portion of
4197 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
4201 *) Add the function sk_find_ex() which works like sk_find(), but will
4202 return an index to an element even if an exact match couldn't be
4203 found. The index is guaranteed to point at the element where the
4204 searched-for key would be inserted to preserve sorting order.
4207 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
4208 takes an extra flags argument for optional functionality. Currently,
4209 the following flags are defined:
4211 OBJ_BSEARCH_VALUE_ON_NOMATCH
4212 This one gets OBJ_bsearch_ex() to return a pointer to the first
4213 element where the comparing function returns a negative or zero
4216 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
4217 This one gets OBJ_bsearch_ex() to return a pointer to the first
4218 element where the comparing function returns zero. This is useful
4219 if there are more than one element where the comparing function
4223 *) Make it possible to create self-signed certificates with 'openssl ca'
4224 in such a way that the self-signed certificate becomes part of the
4225 CA database and uses the same mechanisms for serial number generation
4226 as all other certificate signing. The new flag '-selfsign' enables
4227 this functionality. Adapt CA.sh and CA.pl.in.
4230 *) Add functionality to check the public key of a certificate request
4231 against a given private. This is useful to check that a certificate
4232 request can be signed by that key (self-signing).
4235 *) Make it possible to have multiple active certificates with the same
4236 subject in the CA index file. This is done only if the keyword
4237 'unique_subject' is set to 'no' in the main CA section (default
4238 if 'CA_default') of the configuration file. The value is saved
4239 with the database itself in a separate index attribute file,
4240 named like the index file with '.attr' appended to the name.
4243 *) Generate muti valued AVAs using '+' notation in config files for
4247 *) Support for nameConstraints certificate extension.
4250 *) Support for policyConstraints certificate extension.
4253 *) Support for policyMappings certificate extension.
4256 *) Make sure the default DSA_METHOD implementation only uses its
4257 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
4258 and change its own handlers to be NULL so as to remove unnecessary
4259 indirection. This lets alternative implementations fallback to the
4260 default implementation more easily.
4263 *) Support for directoryName in GeneralName related extensions
4267 *) Make it possible to link applications using Makefile.shared.
4268 Make that possible even when linking against static libraries!
4271 *) Support for single pass processing for S/MIME signing. This now
4272 means that S/MIME signing can be done from a pipe, in addition
4273 cleartext signing (multipart/signed type) is effectively streaming
4274 and the signed data does not need to be all held in memory.
4276 This is done with a new flag PKCS7_STREAM. When this flag is set
4277 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
4278 is done after the data is output (and digests calculated) in
4279 SMIME_write_PKCS7().
4282 *) Add full support for -rpath/-R, both in shared libraries and
4283 applications, at least on the platforms where it's known how
4287 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
4288 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
4289 will now compute a table of multiples of the generator that
4290 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
4291 faster (notably in the case of a single point multiplication,
4292 scalar * generator).
4293 [Nils Larsch, Bodo Moeller]
4295 *) IPv6 support for certificate extensions. The various extensions
4296 which use the IP:a.b.c.d can now take IPv6 addresses using the
4297 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
4301 *) Added an ENGINE that implements RSA by performing private key
4302 exponentiations with the GMP library. The conversions to and from
4303 GMP's mpz_t format aren't optimised nor are any montgomery forms
4304 cached, and on x86 it appears OpenSSL's own performance has caught up.
4305 However there are likely to be other architectures where GMP could
4306 provide a boost. This ENGINE is not built in by default, but it can be
4307 specified at Configure time and should be accompanied by the necessary
4308 linker additions, eg;
4309 ./config -DOPENSSL_USE_GMP -lgmp
4312 *) "openssl engine" will not display ENGINE/DSO load failure errors when
4313 testing availability of engines with "-t" - the old behaviour is
4314 produced by increasing the feature's verbosity with "-tt".
4317 *) ECDSA routines: under certain error conditions uninitialized BN objects
4318 could be freed. Solution: make sure initialization is performed early
4319 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
4323 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
4324 and DH_METHOD (eg. by ENGINE implementations) to override the normal
4325 software implementations. For DSA and DH, parameter generation can
4326 also be overriden by providing the appropriate method callbacks.
4329 *) Change the "progress" mechanism used in key-generation and
4330 primality testing to functions that take a new BN_GENCB pointer in
4331 place of callback/argument pairs. The new API functions have "_ex"
4332 postfixes and the older functions are reimplemented as wrappers for
4333 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
4334 declarations of the old functions to help (graceful) attempts to
4335 migrate to the new functions. Also, the new key-generation API
4336 functions operate on a caller-supplied key-structure and return
4337 success/failure rather than returning a key or NULL - this is to
4338 help make "keygen" another member function of RSA_METHOD etc.
4340 Example for using the new callback interface:
4342 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
4346 BN_GENCB_set(&my_cb, my_callback, my_arg);
4348 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
4349 /* For the meaning of a, b in calls to my_callback(), see the
4350 * documentation of the function that calls the callback.
4351 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
4352 * my_callback should return 1 if it wants BN_is_prime_ex()
4353 * to continue, or 0 to stop.
4358 *) Change the ZLIB compression method to be stateful, and make it
4359 available to TLS with the number defined in
4360 draft-ietf-tls-compression-04.txt.
4363 *) Add the ASN.1 structures and functions for CertificatePair, which
4364 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
4366 CertificatePair ::= SEQUENCE {
4367 forward [0] Certificate OPTIONAL,
4368 reverse [1] Certificate OPTIONAL,
4369 -- at least one of the pair shall be present -- }
4371 Also implement the PEM functions to read and write certificate
4372 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
4374 This needed to be defined, mostly for the sake of the LDAP
4375 attribute crossCertificatePair, but may prove useful elsewhere as
4379 *) Make it possible to inhibit symlinking of shared libraries in
4380 Makefile.shared, for Cygwin's sake.
4383 *) Extend the BIGNUM API by creating a function
4384 void BN_set_negative(BIGNUM *a, int neg);
4385 and a macro that behave like
4386 int BN_is_negative(const BIGNUM *a);
4388 to avoid the need to access 'a->neg' directly in applications.
4391 *) Implement fast modular reduction for pseudo-Mersenne primes
4392 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
4393 EC_GROUP_new_curve_GFp() will now automatically use this
4395 [Nils Larsch <nla@trustcenter.de>]
4397 *) Add new lock type (CRYPTO_LOCK_BN).
projects / openssl.git / blob