5 Changes between 1.0.2 and 1.1.0 [xx XXX xxxx]
7 *) Added ASYNC support. Libcrypto now includes the async sub-library to enable
8 cryptographic operations to be performed asynchronously as long as an
9 asynchronous capable engine is used. See the ASYNC_start_job() man page for
10 further details. Libssl has also had this capability integrated with the
11 introduction of the new mode SSL_MODE_ASYNC and associated error
12 SSL_ERROR_WANT_ASYNC. See the SSL_CTX_set_mode() and SSL_get_error() man
13 pages. This work was developed in partnership with Intel Corp.
16 *) Remove support for SSL_{CTX_}set_tmp_ecdh_callback(). You should set the
17 curve you want to support using SSL_{CTX_}set1_curves().
20 *) State machine rewrite. The state machine code has been significantly
21 refactored in order to remove much duplication of code and solve issues
22 with the old code (see ssl/statem/README for further details). This change
23 does have some associated API changes. Notably the SSL_state() function
24 has been removed and replaced by SSL_get_state which now returns an
25 "OSSL_HANDSHAKE_STATE" instead of an int. SSL_set_state() has been removed
26 altogether. The previous handshake states defined in ssl.h and ssl3.h have
30 *) All instances of the string "ssleay" in the public API were replaced
31 with OpenSSL (case-matching; e.g., OPENSSL_VERSION for #define's)
32 Some error codes related to internal RSA_eay API's were renamed.
35 *) The demo files in crypto/threads were moved to demo/threads.
38 *) Removed obsolete engines: 4758cca, aep, atalla, cswift, nuron and sureware.
41 *) New ASN.1 embed macro.
43 New ASN.1 macro ASN1_EMBED. This is the same as ASN1_SIMPLE except the
44 structure is not allocated: it is part of the parent. That is instead of
52 This reduces memory fragmentation and make it impossible to accidentally
53 set a mandatory field to NULL.
55 This currently only works for some fields specifically a SEQUENCE, CHOICE,
56 or ASN1_STRING type which is part of a parent SEQUENCE. Since it is
57 equivalent to ASN1_SIMPLE it cannot be tagged, OPTIONAL, SET OF or
61 *) Remove EVP_CHECK_DES_KEY, a compile-time option that never compiled.
64 *) Removed DES and RC4 ciphersuites from DEFAULT. Also removed RC2 although
65 in 1.0.2 EXPORT was already removed and the only RC2 ciphersuite is also
66 an EXPORT one. COMPLEMENTOFDEFAULT has been updated accordingly to add
67 DES and RC4 ciphersuites.
70 *) Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs.
71 This changes the decoding behaviour for some invalid messages,
72 though the change is mostly in the more lenient direction, and
73 legacy behaviour is preserved as much as possible.
76 *) Fix no-stdio build.
77 [ David Woodhouse <David.Woodhouse@intel.com> and also
78 Ivan Nestlerode <ivan.nestlerode@sonos.com> ]
80 *) New testing framework
81 The testing framework has been largely rewritten and is now using
82 perl and the perl modules Test::Harness and an extended variant of
83 Test::More called OpenSSL::Test to do its work. All test scripts in
84 test/ have been rewritten into test recipes, and all direct calls to
85 executables in test/Makefile have become individual recipes using the
86 simplified testing OpenSSL::Test::Simple.
88 For documentation on our testing modules, do:
90 perldoc test/testlib/OpenSSL/Test/Simple.pm
91 perldoc test/testlib/OpenSSL/Test.pm
95 *) In DSA_generate_parameters_ex, if the provided seed is too short,
97 [Rich Salz and Ismo Puustinen <ismo.puustinen@intel.com>]
99 *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites
100 from RFC4279, RFC4785, RFC5487, RFC5489.
102 Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the
103 original RSA_PSK patch.
106 *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay
107 era flag was never set throughout the codebase (only read). Also removed
108 SSL3_FLAGS_POP_BUFFER which was only used if
109 SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set.
112 *) Changed the default name options in the "ca", "crl", "req" and "x509"
113 to be "oneline" instead of "compat".
116 *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're
117 not aware of clients that still exhibit this bug, and the workaround
118 hasn't been working properly for a while.
121 *) The return type of BIO_number_read() and BIO_number_written() as well as
122 the corresponding num_read and num_write members in the BIO structure has
123 changed from unsigned long to uint64_t. On platforms where an unsigned
124 long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is
128 *) Given the pervasive nature of TLS extensions it is inadvisable to run
129 OpenSSL without support for them. It also means that maintaining
130 the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably
131 not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed.
134 *) Removed support for the two export grade static DH ciphersuites
135 EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites
136 were newly added (along with a number of other static DH ciphersuites) to
137 1.0.2. However the two export ones have *never* worked since they were
138 introduced. It seems strange in any case to be adding new export
139 ciphersuites, and given "logjam" it also does not seem correct to fix them.
142 *) Version negotiation has been rewritten. In particular SSLv23_method(),
143 SSLv23_client_method() and SSLv23_server_method() have been deprecated,
144 and turned into macros which simply call the new preferred function names
145 TLS_method(), TLS_client_method() and TLS_server_method(). All new code
146 should use the new names instead. Also as part of this change the ssl23.h
147 header file has been removed.
150 *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This
151 code and the associated standard is no longer considered fit-for-purpose.
154 *) RT2547 was closed. When generating a private key, try to make the
155 output file readable only by the owner. This behavior change might
156 be noticeable when interacting with other software.
158 *) Documented all exdata functions. Added CRYPTO_free_ex_index.
162 *) Added HTTP GET support to the ocsp command.
165 *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead.
168 *) Added support for TLS extended master secret from
169 draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an
170 initial patch which was a great help during development.
173 *) All libssl internal structures have been removed from the public header
174 files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is
175 now redundant). Users should not attempt to access internal structures
176 directly. Instead they should use the provided API functions.
179 *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used.
180 Access to deprecated functions can be re-enabled by running config with
181 "enable-deprecated". In addition applications wishing to use deprecated
182 functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour
183 will, by default, disable some transitive includes that previously existed
184 in the header files (e.g. ec.h will no longer, by default, include bn.h)
187 *) Added support for OCB mode. OpenSSL has been granted a patent license
188 compatible with the OpenSSL license for use of OCB. Details are available
189 at https://www.openssl.org/docs/misc/OCB-patent-grant-OpenSSL.pdf. Support
190 for OCB can be removed by calling config with no-ocb.
193 *) SSLv2 support has been removed. It still supports receiving a SSLv2
194 compatible client hello.
197 *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz],
198 done while fixing the error code for the key-too-small case.
199 [Annie Yousar <a.yousar@informatik.hu-berlin.de>]
201 *) CA.sh has been removmed; use CA.pl instead.
204 *) Removed old DES API.
207 *) Remove various unsupported platforms:
213 Sinix/ReliantUNIX RM400
218 16-bit platforms such as WIN16
221 *) Clean up OPENSSL_NO_xxx #define's
222 Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF
223 Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx
224 OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC
225 OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160
226 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO
227 Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY
228 OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP
229 OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK
230 OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY
231 Remove MS_STATIC; it's a relic from platforms <32 bits.
234 *) Cleaned up dead code
235 Remove all but one '#ifdef undef' which is to be looked at.
238 *) Clean up calling of xxx_free routines.
239 Just like free(), fix most of the xxx_free routines to accept
240 NULL. Remove the non-null checks from callers. Save much code.
243 *) Add secure heap for storage of private keys (when possible).
244 Add BIO_s_secmem(), CBIGNUM, etc.
245 Contributed by Akamai Technologies under our Corporate CLA.
248 *) Experimental support for a new, fast, unbiased prime candidate generator,
249 bn_probable_prime_dh_coprime(). Not currently used by any prime generator.
250 [Felix Laurie von Massenbach <felix@erbridge.co.uk>]
252 *) New output format NSS in the sess_id command line tool. This allows
253 exporting the session id and the master key in NSS keylog format.
254 [Martin Kaiser <martin@kaiser.cx>]
256 *) Harmonize version and its documentation. -f flag is used to display
258 [mancha <mancha1@zoho.com>]
260 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
261 in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue.
262 [mancha <mancha1@zoho.com>]
264 *) Fix some double frees. These are not thought to be exploitable.
265 [mancha <mancha1@zoho.com>]
267 *) A missing bounds check in the handling of the TLS heartbeat extension
268 can be used to reveal up to 64k of memory to a connected client or
271 Thanks for Neel Mehta of Google Security for discovering this bug and to
272 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
273 preparing the fix (CVE-2014-0160)
274 [Adam Langley, Bodo Moeller]
276 *) Fix for the attack described in the paper "Recovering OpenSSL
277 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
278 by Yuval Yarom and Naomi Benger. Details can be obtained from:
279 http://eprint.iacr.org/2014/140
281 Thanks to Yuval Yarom and Naomi Benger for discovering this
282 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
283 [Yuval Yarom and Naomi Benger]
285 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
286 this fixes a limitation in previous versions of OpenSSL.
289 *) Experimental encrypt-then-mac support.
291 Experimental support for encrypt then mac from
292 draft-gutmann-tls-encrypt-then-mac-02.txt
294 To enable it set the appropriate extension number (0x42 for the test
295 server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42
297 For non-compliant peers (i.e. just about everything) this should have no
300 WARNING: EXPERIMENTAL, SUBJECT TO CHANGE.
304 *) Add EVP support for key wrapping algorithms, to avoid problems with
305 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
306 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
307 algorithms and include tests cases.
310 *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for
314 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
315 MGF1 digest and OAEP label.
318 *) Make openssl verify return errors.
319 [Chris Palmer <palmer@google.com> and Ben Laurie]
321 *) New function ASN1_TIME_diff to calculate the difference between two
322 ASN1_TIME structures or one structure and the current time.
325 *) Update fips_test_suite to support multiple command line options. New
326 test to induce all self test errors in sequence and check expected
330 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
331 sign or verify all in one operation.
334 *) Add fips_algvs: a multicall fips utility incorporating all the algorithm
335 test programs and fips_test_suite. Includes functionality to parse
336 the minimal script output of fipsalgest.pl directly.
339 *) Add authorisation parameter to FIPS_module_mode_set().
342 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
345 *) Use separate DRBG fields for internal and external flags. New function
346 FIPS_drbg_health_check() to perform on demand health checking. Add
347 generation tests to fips_test_suite with reduced health check interval to
348 demonstrate periodic health checking. Add "nodh" option to
349 fips_test_suite to skip very slow DH test.
352 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
356 *) More extensive health check for DRBG checking many more failure modes.
357 New function FIPS_selftest_drbg_all() to handle every possible DRBG
358 combination: call this in fips_test_suite.
361 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
362 and POST to handle Dual EC cases.
365 *) Add support for canonical generation of DSA parameter 'g'. See
368 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
369 POST to handle HMAC cases.
372 *) Add functions FIPS_module_version() and FIPS_module_version_text()
373 to return numerical and string versions of the FIPS module number.
376 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
377 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented
378 outside the validated module in the FIPS capable OpenSSL.
381 *) Minor change to DRBG entropy callback semantics. In some cases
382 there is no multiple of the block length between min_len and
383 max_len. Allow the callback to return more than max_len bytes
384 of entropy but discard any extra: it is the callback's responsibility
385 to ensure that the extra data discarded does not impact the
386 requested amount of entropy.
389 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
390 information in FIPS186-3, SP800-57 and SP800-131A.
393 *) CCM support via EVP. Interface is very similar to GCM case except we
394 must supply all data in one chunk (i.e. no update, final) and the
395 message length must be supplied if AAD is used. Add algorithm test
399 *) Initial version of POST overhaul. Add POST callback to allow the status
400 of POST to be monitored and/or failures induced. Modify fips_test_suite
401 to use callback. Always run all selftests even if one fails.
404 *) XTS support including algorithm test driver in the fips_gcmtest program.
405 Note: this does increase the maximum key length from 32 to 64 bytes but
406 there should be no binary compatibility issues as existing applications
407 will never use XTS mode.
410 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
411 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
412 performs algorithm blocking for unapproved PRNG types. Also do not
413 set PRNG type in FIPS_mode_set(): leave this to the application.
414 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
415 the standard OpenSSL PRNG: set additional data to a date time vector.
418 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
419 This shouldn't present any incompatibility problems because applications
420 shouldn't be using these directly and any that are will need to rethink
421 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
424 *) Extensive self tests and health checking required by SP800-90 DRBG.
425 Remove strength parameter from FIPS_drbg_instantiate and always
426 instantiate at maximum supported strength.
429 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
432 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
435 *) New function DH_compute_key_padded() to compute a DH key and pad with
436 leading zeroes if needed: this complies with SP800-56A et al.
439 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
440 anything, incomplete, subject to change and largely untested at present.
443 *) Modify fipscanisteronly build option to only build the necessary object
444 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
447 *) Add experimental option FIPSSYMS to give all symbols in
448 fipscanister.o and FIPS or fips prefix. This will avoid
449 conflicts with future versions of OpenSSL. Add perl script
450 util/fipsas.pl to preprocess assembly language source files
451 and rename any affected symbols.
454 *) Add selftest checks and algorithm block of non-fips algorithms in
455 FIPS mode. Remove DES2 from selftests.
458 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
459 return internal method without any ENGINE dependencies. Add new
460 tiny fips sign and verify functions.
463 *) New build option no-ec2m to disable characteristic 2 code.
466 *) New build option "fipscanisteronly". This only builds fipscanister.o
467 and (currently) associated fips utilities. Uses the file Makefile.fips
468 instead of Makefile.org as the prototype.
471 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
472 Update fips_gcmtest to use IV generator.
475 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
476 setting output buffer to NULL. The *Final function must be
477 called although it will not retrieve any additional data. The tag
478 can be set or retrieved with a ctrl. The IV length is by default 12
479 bytes (96 bits) but can be set to an alternative value. If the IV
480 length exceeds the maximum IV length (currently 16 bytes) it cannot be
484 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
485 underlying do_cipher function handles all cipher semantics itself
486 including padding and finalisation. This is useful if (for example)
487 an ENGINE cipher handles block padding itself. The behaviour of
488 do_cipher is subtly changed if this flag is set: the return value
489 is the number of characters written to the output buffer (zero is
490 no longer an error code) or a negative error code. Also if the
491 input buffer is NULL and length 0 finalisation should be performed.
494 *) If a candidate issuer certificate is already part of the constructed
495 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
498 *) Improve forward-security support: add functions
500 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
501 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
503 for use by SSL/TLS servers; the callback function will be called whenever a
504 new session is created, and gets to decide whether the session may be
505 cached to make it resumable (return 0) or not (return 1). (As by the
506 SSL/TLS protocol specifications, the session_id sent by the server will be
507 empty to indicate that the session is not resumable; also, the server will
508 not generate RFC 4507 (RFC 5077) session tickets.)
510 A simple reasonable callback implementation is to return is_forward_secure.
511 This parameter will be set to 1 or 0 depending on the ciphersuite selected
512 by the SSL/TLS server library, indicating whether it can provide forward
514 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
516 *) New -verify_name option in command line utilities to set verification
520 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
521 Add CMAC pkey methods.
524 *) Experimental renegotiation in s_server -www mode. If the client
525 browses /reneg connection is renegotiated. If /renegcert it is
526 renegotiated requesting a certificate.
529 *) Add an "external" session cache for debugging purposes to s_server. This
530 should help trace issues which normally are only apparent in deployed
531 multi-process servers.
534 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
535 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
536 BIO_set_cipher() and some obscure PEM functions were changed so they
537 can now return an error. The RAND changes required a change to the
538 RAND_METHOD structure.
541 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
542 a gcc attribute to warn if the result of a function is ignored. This
543 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
544 whose return value is often ignored.
547 Changes between 1.0.2c and 1.0.2d [9 Jul 2015]
549 *) Alternate chains certificate forgery
551 During certificate verfification, OpenSSL will attempt to find an
552 alternative certificate chain if the first attempt to build such a chain
553 fails. An error in the implementation of this logic can mean that an
554 attacker could cause certain checks on untrusted certificates to be
555 bypassed, such as the CA flag, enabling them to use a valid leaf
556 certificate to act as a CA and "issue" an invalid certificate.
558 This issue was reported to OpenSSL by Adam Langley/David Benjamin
562 Changes between 1.0.2b and 1.0.2c [12 Jun 2015]
564 *) Fix HMAC ABI incompatibility. The previous version introduced an ABI
565 incompatibility in the handling of HMAC. The previous ABI has now been
569 Changes between 1.0.2a and 1.0.2b [11 Jun 2015]
571 *) Malformed ECParameters causes infinite loop
573 When processing an ECParameters structure OpenSSL enters an infinite loop
574 if the curve specified is over a specially malformed binary polynomial
577 This can be used to perform denial of service against any
578 system which processes public keys, certificate requests or
579 certificates. This includes TLS clients and TLS servers with
580 client authentication enabled.
582 This issue was reported to OpenSSL by Joseph Barr-Pixton.
586 *) Exploitable out-of-bounds read in X509_cmp_time
588 X509_cmp_time does not properly check the length of the ASN1_TIME
589 string and can read a few bytes out of bounds. In addition,
590 X509_cmp_time accepts an arbitrary number of fractional seconds in the
593 An attacker can use this to craft malformed certificates and CRLs of
594 various sizes and potentially cause a segmentation fault, resulting in
595 a DoS on applications that verify certificates or CRLs. TLS clients
596 that verify CRLs are affected. TLS clients and servers with client
597 authentication enabled may be affected if they use custom verification
600 This issue was reported to OpenSSL by Robert Swiecki (Google), and
601 independently by Hanno Böck.
605 *) PKCS7 crash with missing EnvelopedContent
607 The PKCS#7 parsing code does not handle missing inner EncryptedContent
608 correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs
609 with missing content and trigger a NULL pointer dereference on parsing.
611 Applications that decrypt PKCS#7 data or otherwise parse PKCS#7
612 structures from untrusted sources are affected. OpenSSL clients and
613 servers are not affected.
615 This issue was reported to OpenSSL by Michal Zalewski (Google).
619 *) CMS verify infinite loop with unknown hash function
621 When verifying a signedData message the CMS code can enter an infinite loop
622 if presented with an unknown hash function OID. This can be used to perform
623 denial of service against any system which verifies signedData messages using
625 This issue was reported to OpenSSL by Johannes Bauer.
629 *) Race condition handling NewSessionTicket
631 If a NewSessionTicket is received by a multi-threaded client when attempting to
632 reuse a previous ticket then a race condition can occur potentially leading to
633 a double free of the ticket data.
637 *) Only support 256-bit or stronger elliptic curves with the
638 'ecdh_auto' setting (server) or by default (client). Of supported
639 curves, prefer P-256 (both).
642 Changes between 1.0.2 and 1.0.2a [19 Mar 2015]
644 *) ClientHello sigalgs DoS fix
646 If a client connects to an OpenSSL 1.0.2 server and renegotiates with an
647 invalid signature algorithms extension a NULL pointer dereference will
648 occur. This can be exploited in a DoS attack against the server.
650 This issue was was reported to OpenSSL by David Ramos of Stanford
653 [Stephen Henson and Matt Caswell]
655 *) Multiblock corrupted pointer fix
657 OpenSSL 1.0.2 introduced the "multiblock" performance improvement. This
658 feature only applies on 64 bit x86 architecture platforms that support AES
659 NI instructions. A defect in the implementation of "multiblock" can cause
660 OpenSSL's internal write buffer to become incorrectly set to NULL when
661 using non-blocking IO. Typically, when the user application is using a
662 socket BIO for writing, this will only result in a failed connection.
663 However if some other BIO is used then it is likely that a segmentation
664 fault will be triggered, thus enabling a potential DoS attack.
666 This issue was reported to OpenSSL by Daniel Danner and Rainer Mueller.
670 *) Segmentation fault in DTLSv1_listen fix
672 The DTLSv1_listen function is intended to be stateless and processes the
673 initial ClientHello from many peers. It is common for user code to loop
674 over the call to DTLSv1_listen until a valid ClientHello is received with
675 an associated cookie. A defect in the implementation of DTLSv1_listen means
676 that state is preserved in the SSL object from one invocation to the next
677 that can lead to a segmentation fault. Errors processing the initial
678 ClientHello can trigger this scenario. An example of such an error could be
679 that a DTLS1.0 only client is attempting to connect to a DTLS1.2 only
682 This issue was reported to OpenSSL by Per Allansson.
686 *) Segmentation fault in ASN1_TYPE_cmp fix
688 The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is
689 made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check
690 certificate signature algorithm consistency this can be used to crash any
691 certificate verification operation and exploited in a DoS attack. Any
692 application which performs certificate verification is vulnerable including
693 OpenSSL clients and servers which enable client authentication.
697 *) Segmentation fault for invalid PSS parameters fix
699 The signature verification routines will crash with a NULL pointer
700 dereference if presented with an ASN.1 signature using the RSA PSS
701 algorithm and invalid parameters. Since these routines are used to verify
702 certificate signature algorithms this can be used to crash any
703 certificate verification operation and exploited in a DoS attack. Any
704 application which performs certificate verification is vulnerable including
705 OpenSSL clients and servers which enable client authentication.
707 This issue was was reported to OpenSSL by Brian Carpenter.
711 *) ASN.1 structure reuse memory corruption fix
713 Reusing a structure in ASN.1 parsing may allow an attacker to cause
714 memory corruption via an invalid write. Such reuse is and has been
715 strongly discouraged and is believed to be rare.
717 Applications that parse structures containing CHOICE or ANY DEFINED BY
718 components may be affected. Certificate parsing (d2i_X509 and related
719 functions) are however not affected. OpenSSL clients and servers are
724 *) PKCS7 NULL pointer dereferences fix
726 The PKCS#7 parsing code does not handle missing outer ContentInfo
727 correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with
728 missing content and trigger a NULL pointer dereference on parsing.
730 Applications that verify PKCS#7 signatures, decrypt PKCS#7 data or
731 otherwise parse PKCS#7 structures from untrusted sources are
732 affected. OpenSSL clients and servers are not affected.
734 This issue was reported to OpenSSL by Michal Zalewski (Google).
738 *) DoS via reachable assert in SSLv2 servers fix
740 A malicious client can trigger an OPENSSL_assert (i.e., an abort) in
741 servers that both support SSLv2 and enable export cipher suites by sending
742 a specially crafted SSLv2 CLIENT-MASTER-KEY message.
744 This issue was discovered by Sean Burford (Google) and Emilia Käsper
745 (OpenSSL development team).
749 *) Empty CKE with client auth and DHE fix
751 If client auth is used then a server can seg fault in the event of a DHE
752 ciphersuite being selected and a zero length ClientKeyExchange message
753 being sent by the client. This could be exploited in a DoS attack.
757 *) Handshake with unseeded PRNG fix
759 Under certain conditions an OpenSSL 1.0.2 client can complete a handshake
760 with an unseeded PRNG. The conditions are:
761 - The client is on a platform where the PRNG has not been seeded
762 automatically, and the user has not seeded manually
763 - A protocol specific client method version has been used (i.e. not
764 SSL_client_methodv23)
765 - A ciphersuite is used that does not require additional random data from
766 the PRNG beyond the initial ClientHello client random (e.g. PSK-RC4-SHA).
768 If the handshake succeeds then the client random that has been used will
769 have been generated from a PRNG with insufficient entropy and therefore the
770 output may be predictable.
772 For example using the following command with an unseeded openssl will
773 succeed on an unpatched platform:
775 openssl s_client -psk 1a2b3c4d -tls1_2 -cipher PSK-RC4-SHA
779 *) Use After Free following d2i_ECPrivatekey error fix
781 A malformed EC private key file consumed via the d2i_ECPrivateKey function
782 could cause a use after free condition. This, in turn, could cause a double
783 free in several private key parsing functions (such as d2i_PrivateKey
784 or EVP_PKCS82PKEY) and could lead to a DoS attack or memory corruption
785 for applications that receive EC private keys from untrusted
786 sources. This scenario is considered rare.
788 This issue was discovered by the BoringSSL project and fixed in their
793 *) X509_to_X509_REQ NULL pointer deref fix
795 The function X509_to_X509_REQ will crash with a NULL pointer dereference if
796 the certificate key is invalid. This function is rarely used in practice.
798 This issue was discovered by Brian Carpenter.
802 *) Removed the export ciphers from the DEFAULT ciphers
805 Changes between 1.0.1l and 1.0.2 [22 Jan 2015]
807 *) Facilitate "universal" ARM builds targeting range of ARM ISAs, e.g.
808 ARMv5 through ARMv8, as opposite to "locking" it to single one.
809 So far those who have to target multiple plaforms would compromise
810 and argue that binary targeting say ARMv5 would still execute on
811 ARMv8. "Universal" build resolves this compromise by providing
812 near-optimal performance even on newer platforms.
815 *) Accelerated NIST P-256 elliptic curve implementation for x86_64
816 (other platforms pending).
817 [Shay Gueron & Vlad Krasnov (Intel Corp), Andy Polyakov]
819 *) Add support for the SignedCertificateTimestampList certificate and
820 OCSP response extensions from RFC6962.
823 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
824 for corner cases. (Certain input points at infinity could lead to
825 bogus results, with non-infinity inputs mapped to infinity too.)
828 *) Initial support for PowerISA 2.0.7, first implemented in POWER8.
829 This covers AES, SHA256/512 and GHASH. "Initial" means that most
830 common cases are optimized and there still is room for further
831 improvements. Vector Permutation AES for Altivec is also added.
834 *) Add support for little-endian ppc64 Linux target.
835 [Marcelo Cerri (IBM)]
837 *) Initial support for AMRv8 ISA crypto extensions. This covers AES,
838 SHA1, SHA256 and GHASH. "Initial" means that most common cases
839 are optimized and there still is room for further improvements.
840 Both 32- and 64-bit modes are supported.
841 [Andy Polyakov, Ard Biesheuvel (Linaro)]
843 *) Improved ARMv7 NEON support.
846 *) Support for SPARC Architecture 2011 crypto extensions, first
847 implemented in SPARC T4. This covers AES, DES, Camellia, SHA1,
848 SHA256/512, MD5, GHASH and modular exponentiation.
849 [Andy Polyakov, David Miller]
851 *) Accelerated modular exponentiation for Intel processors, a.k.a.
853 [Shay Gueron & Vlad Krasnov (Intel Corp)]
855 *) Support for new and upcoming Intel processors, including AVX2,
856 BMI and SHA ISA extensions. This includes additional "stitched"
857 implementations, AESNI-SHA256 and GCM, and multi-buffer support
860 This work was sponsored by Intel Corp.
863 *) Support for DTLS 1.2. This adds two sets of DTLS methods: DTLS_*_method()
864 supports both DTLS 1.2 and 1.0 and should use whatever version the peer
865 supports and DTLSv1_2_*_method() which supports DTLS 1.2 only.
868 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
869 this fixes a limiation in previous versions of OpenSSL.
872 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
873 MGF1 digest and OAEP label.
876 *) Add EVP support for key wrapping algorithms, to avoid problems with
877 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
878 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
879 algorithms and include tests cases.
882 *) Add functions to allocate and set the fields of an ECDSA_METHOD
884 [Douglas E. Engert, Steve Henson]
886 *) New functions OPENSSL_gmtime_diff and ASN1_TIME_diff to find the
887 difference in days and seconds between two tm or ASN1_TIME structures.
890 *) Add -rev test option to s_server to just reverse order of characters
891 received by client and send back to server. Also prints an abbreviated
892 summary of the connection parameters.
895 *) New option -brief for s_client and s_server to print out a brief summary
896 of connection parameters.
899 *) Add callbacks for arbitrary TLS extensions.
900 [Trevor Perrin <trevp@trevp.net> and Ben Laurie]
902 *) New option -crl_download in several openssl utilities to download CRLs
903 from CRLDP extension in certificates.
906 *) New options -CRL and -CRLform for s_client and s_server for CRLs.
909 *) New function X509_CRL_diff to generate a delta CRL from the difference
910 of two full CRLs. Add support to "crl" utility.
913 *) New functions to set lookup_crls function and to retrieve
914 X509_STORE from X509_STORE_CTX.
917 *) Print out deprecated issuer and subject unique ID fields in
921 *) Extend OCSP I/O functions so they can be used for simple general purpose
922 HTTP as well as OCSP. New wrapper function which can be used to download
923 CRLs using the OCSP API.
926 *) Delegate command line handling in s_client/s_server to SSL_CONF APIs.
929 *) SSL_CONF* functions. These provide a common framework for application
930 configuration using configuration files or command lines.
933 *) SSL/TLS tracing code. This parses out SSL/TLS records using the
934 message callback and prints the results. Needs compile time option
935 "enable-ssl-trace". New options to s_client and s_server to enable
939 *) New ctrl and macro to retrieve supported points extensions.
940 Print out extension in s_server and s_client.
943 *) New functions to retrieve certificate signature and signature
947 *) Add functions to retrieve and manipulate the raw cipherlist sent by a
951 *) New Suite B modes for TLS code. These use and enforce the requirements
952 of RFC6460: restrict ciphersuites, only permit Suite B algorithms and
953 only use Suite B curves. The Suite B modes can be set by using the
954 strings "SUITEB128", "SUITEB192" or "SUITEB128ONLY" for the cipherstring.
957 *) New chain verification flags for Suite B levels of security. Check
958 algorithms are acceptable when flags are set in X509_verify_cert.
961 *) Make tls1_check_chain return a set of flags indicating checks passed
962 by a certificate chain. Add additional tests to handle client
963 certificates: checks for matching certificate type and issuer name
967 *) If an attempt is made to use a signature algorithm not in the peer
968 preference list abort the handshake. If client has no suitable
969 signature algorithms in response to a certificate request do not
973 *) If server EC tmp key is not in client preference list abort handshake.
976 *) Add support for certificate stores in CERT structure. This makes it
977 possible to have different stores per SSL structure or one store in
978 the parent SSL_CTX. Include distint stores for certificate chain
979 verification and chain building. New ctrl SSL_CTRL_BUILD_CERT_CHAIN
980 to build and store a certificate chain in CERT structure: returing
981 an error if the chain cannot be built: this will allow applications
982 to test if a chain is correctly configured.
984 Note: if the CERT based stores are not set then the parent SSL_CTX
985 store is used to retain compatibility with existing behaviour.
989 *) New function ssl_set_client_disabled to set a ciphersuite disabled
990 mask based on the current session, check mask when sending client
991 hello and checking the requested ciphersuite.
994 *) New ctrls to retrieve and set certificate types in a certificate
995 request message. Print out received values in s_client. If certificate
996 types is not set with custom values set sensible values based on
997 supported signature algorithms.
1000 *) Support for distinct client and server supported signature algorithms.
1003 *) Add certificate callback. If set this is called whenever a certificate
1004 is required by client or server. An application can decide which
1005 certificate chain to present based on arbitrary criteria: for example
1006 supported signature algorithms. Add very simple example to s_server.
1007 This fixes many of the problems and restrictions of the existing client
1008 certificate callback: for example you can now clear an existing
1009 certificate and specify the whole chain.
1012 *) Add new "valid_flags" field to CERT_PKEY structure which determines what
1013 the certificate can be used for (if anything). Set valid_flags field
1014 in new tls1_check_chain function. Simplify ssl_set_cert_masks which used
1015 to have similar checks in it.
1017 Add new "cert_flags" field to CERT structure and include a "strict mode".
1018 This enforces some TLS certificate requirements (such as only permitting
1019 certificate signature algorithms contained in the supported algorithms
1020 extension) which some implementations ignore: this option should be used
1021 with caution as it could cause interoperability issues.
1024 *) Update and tidy signature algorithm extension processing. Work out
1025 shared signature algorithms based on preferences and peer algorithms
1026 and print them out in s_client and s_server. Abort handshake if no
1027 shared signature algorithms.
1030 *) Add new functions to allow customised supported signature algorithms
1031 for SSL and SSL_CTX structures. Add options to s_client and s_server
1035 *) New function SSL_certs_clear() to delete all references to certificates
1036 from an SSL structure. Before this once a certificate had been added
1037 it couldn't be removed.
1040 *) Integrate hostname, email address and IP address checking with certificate
1041 verification. New verify options supporting checking in opensl utility.
1044 *) Fixes and wildcard matching support to hostname and email checking
1045 functions. Add manual page.
1046 [Florian Weimer (Red Hat Product Security Team)]
1048 *) New functions to check a hostname email or IP address against a
1049 certificate. Add options x509 utility to print results of checks against
1053 *) Fix OCSP checking.
1054 [Rob Stradling <rob.stradling@comodo.com> and Ben Laurie]
1056 *) Initial experimental support for explicitly trusted non-root CAs.
1057 OpenSSL still tries to build a complete chain to a root but if an
1058 intermediate CA has a trust setting included that is used. The first
1059 setting is used: whether to trust (e.g., -addtrust option to the x509
1063 *) Add -trusted_first option which attempts to find certificates in the
1064 trusted store even if an untrusted chain is also supplied.
1067 *) MIPS assembly pack updates: support for MIPS32r2 and SmartMIPS ASE,
1068 platform support for Linux and Android.
1071 *) Support for linux-x32, ILP32 environment in x86_64 framework.
1074 *) Experimental multi-implementation support for FIPS capable OpenSSL.
1075 When in FIPS mode the approved implementations are used as normal,
1076 when not in FIPS mode the internal unapproved versions are used instead.
1077 This means that the FIPS capable OpenSSL isn't forced to use the
1078 (often lower performance) FIPS implementations outside FIPS mode.
1081 *) Transparently support X9.42 DH parameters when calling
1082 PEM_read_bio_DHparameters. This means existing applications can handle
1083 the new parameter format automatically.
1086 *) Initial experimental support for X9.42 DH parameter format: mainly
1087 to support use of 'q' parameter for RFC5114 parameters.
1090 *) Add DH parameters from RFC5114 including test data to dhtest.
1093 *) Support for automatic EC temporary key parameter selection. If enabled
1094 the most preferred EC parameters are automatically used instead of
1095 hardcoded fixed parameters. Now a server just has to call:
1096 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
1097 support ECDH and use the most appropriate parameters.
1100 *) Enhance and tidy EC curve and point format TLS extension code. Use
1101 static structures instead of allocation if default values are used.
1102 New ctrls to set curves we wish to support and to retrieve shared curves.
1103 Print out shared curves in s_server. New options to s_server and s_client
1104 to set list of supported curves.
1107 *) New ctrls to retrieve supported signature algorithms and
1108 supported curve values as an array of NIDs. Extend openssl utility
1109 to print out received values.
1112 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
1113 between NIDs and the more common NIST names such as "P-256". Enhance
1114 ecparam utility and ECC method to recognise the NIST names for curves.
1117 *) Enhance SSL/TLS certificate chain handling to support different
1118 chains for each certificate instead of one chain in the parent SSL_CTX.
1121 *) Support for fixed DH ciphersuite client authentication: where both
1122 server and client use DH certificates with common parameters.
1125 *) Support for fixed DH ciphersuites: those requiring DH server
1129 *) New function i2d_re_X509_tbs for re-encoding the TBS portion of
1131 Note: Related 1.0.2-beta specific macros X509_get_cert_info,
1132 X509_CINF_set_modified, X509_CINF_get_issuer, X509_CINF_get_extensions and
1133 X509_CINF_get_signature were reverted post internal team review.
1135 Changes between 1.0.1k and 1.0.1l [15 Jan 2015]
1137 *) Build fixes for the Windows and OpenVMS platforms
1138 [Matt Caswell and Richard Levitte]
1140 Changes between 1.0.1j and 1.0.1k [8 Jan 2015]
1142 *) Fix DTLS segmentation fault in dtls1_get_record. A carefully crafted DTLS
1143 message can cause a segmentation fault in OpenSSL due to a NULL pointer
1144 dereference. This could lead to a Denial Of Service attack. Thanks to
1145 Markus Stenberg of Cisco Systems, Inc. for reporting this issue.
1149 *) Fix DTLS memory leak in dtls1_buffer_record. A memory leak can occur in the
1150 dtls1_buffer_record function under certain conditions. In particular this
1151 could occur if an attacker sent repeated DTLS records with the same
1152 sequence number but for the next epoch. The memory leak could be exploited
1153 by an attacker in a Denial of Service attack through memory exhaustion.
1154 Thanks to Chris Mueller for reporting this issue.
1158 *) Fix issue where no-ssl3 configuration sets method to NULL. When openssl is
1159 built with the no-ssl3 option and a SSL v3 ClientHello is received the ssl
1160 method would be set to NULL which could later result in a NULL pointer
1161 dereference. Thanks to Frank Schmirler for reporting this issue.
1165 *) Abort handshake if server key exchange message is omitted for ephemeral
1168 Thanks to Karthikeyan Bhargavan of the PROSECCO team at INRIA for
1169 reporting this issue.
1173 *) Remove non-export ephemeral RSA code on client and server. This code
1174 violated the TLS standard by allowing the use of temporary RSA keys in
1175 non-export ciphersuites and could be used by a server to effectively
1176 downgrade the RSA key length used to a value smaller than the server
1177 certificate. Thanks for Karthikeyan Bhargavan of the PROSECCO team at
1178 INRIA or reporting this issue.
1182 *) Fixed issue where DH client certificates are accepted without verification.
1183 An OpenSSL server will accept a DH certificate for client authentication
1184 without the certificate verify message. This effectively allows a client to
1185 authenticate without the use of a private key. This only affects servers
1186 which trust a client certificate authority which issues certificates
1187 containing DH keys: these are extremely rare and hardly ever encountered.
1188 Thanks for Karthikeyan Bhargavan of the PROSECCO team at INRIA or reporting
1193 *) Ensure that the session ID context of an SSL is updated when its
1194 SSL_CTX is updated via SSL_set_SSL_CTX.
1196 The session ID context is typically set from the parent SSL_CTX,
1197 and can vary with the CTX.
1200 *) Fix various certificate fingerprint issues.
1202 By using non-DER or invalid encodings outside the signed portion of a
1203 certificate the fingerprint can be changed without breaking the signature.
1204 Although no details of the signed portion of the certificate can be changed
1205 this can cause problems with some applications: e.g. those using the
1206 certificate fingerprint for blacklists.
1208 1. Reject signatures with non zero unused bits.
1210 If the BIT STRING containing the signature has non zero unused bits reject
1211 the signature. All current signature algorithms require zero unused bits.
1213 2. Check certificate algorithm consistency.
1215 Check the AlgorithmIdentifier inside TBS matches the one in the
1216 certificate signature. NB: this will result in signature failure
1217 errors for some broken certificates.
1219 Thanks to Konrad Kraszewski from Google for reporting this issue.
1221 3. Check DSA/ECDSA signatures use DER.
1223 Reencode DSA/ECDSA signatures and compare with the original received
1224 signature. Return an error if there is a mismatch.
1226 This will reject various cases including garbage after signature
1227 (thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
1228 program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
1229 (negative or with leading zeroes).
1231 Further analysis was conducted and fixes were developed by Stephen Henson
1232 of the OpenSSL core team.
1237 *) Correct Bignum squaring. Bignum squaring (BN_sqr) may produce incorrect
1238 results on some platforms, including x86_64. This bug occurs at random
1239 with a very low probability, and is not known to be exploitable in any
1240 way, though its exact impact is difficult to determine. Thanks to Pieter
1241 Wuille (Blockstream) who reported this issue and also suggested an initial
1242 fix. Further analysis was conducted by the OpenSSL development team and
1243 Adam Langley of Google. The final fix was developed by Andy Polyakov of
1244 the OpenSSL core team.
1248 *) Do not resume sessions on the server if the negotiated protocol
1249 version does not match the session's version. Resuming with a different
1250 version, while not strictly forbidden by the RFC, is of questionable
1251 sanity and breaks all known clients.
1252 [David Benjamin, Emilia Käsper]
1254 *) Tighten handling of the ChangeCipherSpec (CCS) message: reject
1255 early CCS messages during renegotiation. (Note that because
1256 renegotiation is encrypted, this early CCS was not exploitable.)
1259 *) Tighten client-side session ticket handling during renegotiation:
1260 ensure that the client only accepts a session ticket if the server sends
1261 the extension anew in the ServerHello. Previously, a TLS client would
1262 reuse the old extension state and thus accept a session ticket if one was
1263 announced in the initial ServerHello.
1265 Similarly, ensure that the client requires a session ticket if one
1266 was advertised in the ServerHello. Previously, a TLS client would
1267 ignore a missing NewSessionTicket message.
1270 Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
1272 *) SRTP Memory Leak.
1274 A flaw in the DTLS SRTP extension parsing code allows an attacker, who
1275 sends a carefully crafted handshake message, to cause OpenSSL to fail
1276 to free up to 64k of memory causing a memory leak. This could be
1277 exploited in a Denial Of Service attack. This issue affects OpenSSL
1278 1.0.1 server implementations for both SSL/TLS and DTLS regardless of
1279 whether SRTP is used or configured. Implementations of OpenSSL that
1280 have been compiled with OPENSSL_NO_SRTP defined are not affected.
1282 The fix was developed by the OpenSSL team.
1286 *) Session Ticket Memory Leak.
1288 When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
1289 integrity of that ticket is first verified. In the event of a session
1290 ticket integrity check failing, OpenSSL will fail to free memory
1291 causing a memory leak. By sending a large number of invalid session
1292 tickets an attacker could exploit this issue in a Denial Of Service
1297 *) Build option no-ssl3 is incomplete.
1299 When OpenSSL is configured with "no-ssl3" as a build option, servers
1300 could accept and complete a SSL 3.0 handshake, and clients could be
1301 configured to send them.
1303 [Akamai and the OpenSSL team]
1305 *) Add support for TLS_FALLBACK_SCSV.
1306 Client applications doing fallback retries should call
1307 SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
1309 [Adam Langley, Bodo Moeller]
1311 *) Add additional DigestInfo checks.
1313 Reencode DigestInto in DER and check against the original when
1314 verifying RSA signature: this will reject any improperly encoded
1315 DigestInfo structures.
1317 Note: this is a precautionary measure and no attacks are currently known.
1321 Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
1323 *) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
1324 SRP code can be overrun an internal buffer. Add sanity check that
1325 g, A, B < N to SRP code.
1327 Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
1328 Group for discovering this issue.
1332 *) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
1333 TLS 1.0 instead of higher protocol versions when the ClientHello message
1334 is badly fragmented. This allows a man-in-the-middle attacker to force a
1335 downgrade to TLS 1.0 even if both the server and the client support a
1336 higher protocol version, by modifying the client's TLS records.
1338 Thanks to David Benjamin and Adam Langley (Google) for discovering and
1339 researching this issue.
1343 *) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
1344 to a denial of service attack. A malicious server can crash the client
1345 with a null pointer dereference (read) by specifying an anonymous (EC)DH
1346 ciphersuite and sending carefully crafted handshake messages.
1348 Thanks to Felix Gröbert (Google) for discovering and researching this
1353 *) By sending carefully crafted DTLS packets an attacker could cause openssl
1354 to leak memory. This can be exploited through a Denial of Service attack.
1355 Thanks to Adam Langley for discovering and researching this issue.
1359 *) An attacker can force openssl to consume large amounts of memory whilst
1360 processing DTLS handshake messages. This can be exploited through a
1361 Denial of Service attack.
1362 Thanks to Adam Langley for discovering and researching this issue.
1366 *) An attacker can force an error condition which causes openssl to crash
1367 whilst processing DTLS packets due to memory being freed twice. This
1368 can be exploited through a Denial of Service attack.
1369 Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
1374 *) If a multithreaded client connects to a malicious server using a resumed
1375 session and the server sends an ec point format extension it could write
1376 up to 255 bytes to freed memory.
1378 Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
1383 *) A malicious server can crash an OpenSSL client with a null pointer
1384 dereference (read) by specifying an SRP ciphersuite even though it was not
1385 properly negotiated with the client. This can be exploited through a
1386 Denial of Service attack.
1388 Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
1389 discovering and researching this issue.
1393 *) A flaw in OBJ_obj2txt may cause pretty printing functions such as
1394 X509_name_oneline, X509_name_print_ex et al. to leak some information
1395 from the stack. Applications may be affected if they echo pretty printing
1396 output to the attacker.
1398 Thanks to Ivan Fratric (Google) for discovering this issue.
1400 [Emilia Käsper, and Steve Henson]
1402 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
1403 for corner cases. (Certain input points at infinity could lead to
1404 bogus results, with non-infinity inputs mapped to infinity too.)
1407 Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
1409 *) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
1410 handshake can force the use of weak keying material in OpenSSL
1411 SSL/TLS clients and servers.
1413 Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
1414 researching this issue. (CVE-2014-0224)
1415 [KIKUCHI Masashi, Steve Henson]
1417 *) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
1418 OpenSSL DTLS client the code can be made to recurse eventually crashing
1421 Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
1423 [Imre Rad, Steve Henson]
1425 *) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
1426 be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
1427 client or server. This is potentially exploitable to run arbitrary
1428 code on a vulnerable client or server.
1430 Thanks to Jüri Aedla for reporting this issue. (CVE-2014-0195)
1431 [Jüri Aedla, Steve Henson]
1433 *) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
1434 are subject to a denial of service attack.
1436 Thanks to Felix Gröbert and Ivan Fratric at Google for discovering
1437 this issue. (CVE-2014-3470)
1438 [Felix Gröbert, Ivan Fratric, Steve Henson]
1440 *) Harmonize version and its documentation. -f flag is used to display
1442 [mancha <mancha1@zoho.com>]
1444 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
1445 in i2d_ECPrivateKey.
1446 [mancha <mancha1@zoho.com>]
1448 *) Fix some double frees. These are not thought to be exploitable.
1449 [mancha <mancha1@zoho.com>]
1451 Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
1453 *) A missing bounds check in the handling of the TLS heartbeat extension
1454 can be used to reveal up to 64k of memory to a connected client or
1457 Thanks for Neel Mehta of Google Security for discovering this bug and to
1458 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
1459 preparing the fix (CVE-2014-0160)
1460 [Adam Langley, Bodo Moeller]
1462 *) Fix for the attack described in the paper "Recovering OpenSSL
1463 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
1464 by Yuval Yarom and Naomi Benger. Details can be obtained from:
1465 http://eprint.iacr.org/2014/140
1467 Thanks to Yuval Yarom and Naomi Benger for discovering this
1468 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
1469 [Yuval Yarom and Naomi Benger]
1471 *) TLS pad extension: draft-agl-tls-padding-03
1473 Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
1474 TLS client Hello record length value would otherwise be > 255 and
1475 less that 512 pad with a dummy extension containing zeroes so it
1476 is at least 512 bytes long.
1478 [Adam Langley, Steve Henson]
1480 Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
1482 *) Fix for TLS record tampering bug. A carefully crafted invalid
1483 handshake could crash OpenSSL with a NULL pointer exception.
1484 Thanks to Anton Johansson for reporting this issues.
1487 *) Keep original DTLS digest and encryption contexts in retransmission
1488 structures so we can use the previous session parameters if they need
1489 to be resent. (CVE-2013-6450)
1492 *) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
1493 avoids preferring ECDHE-ECDSA ciphers when the client appears to be
1494 Safari on OS X. Safari on OS X 10.8..10.8.3 advertises support for
1495 several ECDHE-ECDSA ciphers, but fails to negotiate them. The bug
1496 is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
1497 10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
1498 [Rob Stradling, Adam Langley]
1500 Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
1502 *) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
1503 supporting platforms or when small records were transferred.
1504 [Andy Polyakov, Steve Henson]
1506 Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
1508 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
1510 This addresses the flaw in CBC record processing discovered by
1511 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
1512 at: http://www.isg.rhul.ac.uk/tls/
1514 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1515 Security Group at Royal Holloway, University of London
1516 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
1517 Emilia Käsper for the initial patch.
1519 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
1521 *) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
1522 ciphersuites which can be exploited in a denial of service attack.
1523 Thanks go to and to Adam Langley <agl@chromium.org> for discovering
1524 and detecting this bug and to Wolfgang Ettlinger
1525 <wolfgang.ettlinger@gmail.com> for independently discovering this issue.
1529 *) Return an error when checking OCSP signatures when key is NULL.
1530 This fixes a DoS attack. (CVE-2013-0166)
1533 *) Make openssl verify return errors.
1534 [Chris Palmer <palmer@google.com> and Ben Laurie]
1536 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
1537 the right response is stapled. Also change SSL_get_certificate()
1538 so it returns the certificate actually sent.
1539 See http://rt.openssl.org/Ticket/Display.html?id=2836.
1540 [Rob Stradling <rob.stradling@comodo.com>]
1542 *) Fix possible deadlock when decoding public keys.
1545 *) Don't use TLS 1.0 record version number in initial client hello
1549 Changes between 1.0.1b and 1.0.1c [10 May 2012]
1551 *) Sanity check record length before skipping explicit IV in TLS
1552 1.2, 1.1 and DTLS to fix DoS attack.
1554 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
1555 fuzzing as a service testing platform.
1559 *) Initialise tkeylen properly when encrypting CMS messages.
1560 Thanks to Solar Designer of Openwall for reporting this issue.
1563 *) In FIPS mode don't try to use composite ciphers as they are not
1567 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
1569 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
1570 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
1571 mean any application compiled against OpenSSL 1.0.0 headers setting
1572 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
1573 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
1574 0x10000000L Any application which was previously compiled against
1575 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
1576 will need to be recompiled as a result. Letting be results in
1577 inability to disable specifically TLS 1.1 and in client context,
1578 in unlike event, limit maximum offered version to TLS 1.0 [see below].
1581 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
1582 disable just protocol X, but all protocols above X *if* there are
1583 protocols *below* X still enabled. In more practical terms it means
1584 that if application wants to disable TLS1.0 in favor of TLS1.1 and
1585 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
1586 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
1590 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
1592 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
1593 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
1594 in CRYPTO_realloc_clean.
1596 Thanks to Tavis Ormandy, Google Security Team, for discovering this
1597 issue and to Adam Langley <agl@chromium.org> for fixing it.
1599 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
1601 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
1604 *) Workarounds for some broken servers that "hang" if a client hello
1605 record length exceeds 255 bytes.
1607 1. Do not use record version number > TLS 1.0 in initial client
1608 hello: some (but not all) hanging servers will now work.
1609 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
1610 the number of ciphers sent in the client hello. This should be
1611 set to an even number, such as 50, for example by passing:
1612 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
1613 Most broken servers should now work.
1614 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
1615 TLS 1.2 client support entirely.
1618 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
1621 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
1623 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
1624 STRING form instead of a DigestInfo.
1627 *) The format used for MDC2 RSA signatures is inconsistent between EVP
1628 and the RSA_sign/RSA_verify functions. This was made more apparent when
1629 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
1630 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
1631 the correct format in RSA_verify so both forms transparently work.
1634 *) Some servers which support TLS 1.0 can choke if we initially indicate
1635 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
1636 encrypted premaster secret. As a workaround use the maximum permitted
1637 client version in client hello, this should keep such servers happy
1638 and still work with previous versions of OpenSSL.
1641 *) Add support for TLS/DTLS heartbeats.
1642 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1644 *) Add support for SCTP.
1645 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1647 *) Improved PRNG seeding for VOS.
1648 [Paul Green <Paul.Green@stratus.com>]
1650 *) Extensive assembler packs updates, most notably:
1652 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
1653 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
1654 - x86_64: bit-sliced AES implementation;
1655 - ARM: NEON support, contemporary platforms optimizations;
1656 - s390x: z196 support;
1657 - *: GHASH and GF(2^m) multiplication implementations;
1661 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
1662 (removal of unnecessary code)
1663 [Peter Sylvester <peter.sylvester@edelweb.fr>]
1665 *) Add TLS key material exporter from RFC 5705.
1668 *) Add DTLS-SRTP negotiation from RFC 5764.
1671 *) Add Next Protocol Negotiation,
1672 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
1673 disabled with a no-npn flag to config or Configure. Code donated
1675 [Adam Langley <agl@google.com> and Ben Laurie]
1677 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
1678 NIST-P256, NIST-P521, with constant-time single point multiplication on
1679 typical inputs. Compiler support for the nonstandard type __uint128_t is
1680 required to use this (present in gcc 4.4 and later, for 64-bit builds).
1681 Code made available under Apache License version 2.0.
1683 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
1684 line to include this in your build of OpenSSL, and run "make depend" (or
1685 "make update"). This enables the following EC_METHODs:
1687 EC_GFp_nistp224_method()
1688 EC_GFp_nistp256_method()
1689 EC_GFp_nistp521_method()
1691 EC_GROUP_new_by_curve_name() will automatically use these (while
1692 EC_GROUP_new_curve_GFp() currently prefers the more flexible
1694 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
1696 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
1697 all platforms. Move ssize_t definition from e_os.h to the public
1698 header file e_os2.h as it now appears in public header file cms.h
1701 *) New -sigopt option to the ca, req and x509 utilities. Additional
1702 signature parameters can be passed using this option and in
1706 *) Add RSA PSS signing function. This will generate and set the
1707 appropriate AlgorithmIdentifiers for PSS based on those in the
1708 corresponding EVP_MD_CTX structure. No application support yet.
1711 *) Support for companion algorithm specific ASN1 signing routines.
1712 New function ASN1_item_sign_ctx() signs a pre-initialised
1713 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
1714 the appropriate parameters.
1717 *) Add new algorithm specific ASN1 verification initialisation function
1718 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
1719 handling will be the same no matter what EVP_PKEY_METHOD is used.
1720 Add a PSS handler to support verification of PSS signatures: checked
1721 against a number of sample certificates.
1724 *) Add signature printing for PSS. Add PSS OIDs.
1725 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
1727 *) Add algorithm specific signature printing. An individual ASN1 method
1728 can now print out signatures instead of the standard hex dump.
1730 More complex signatures (e.g. PSS) can print out more meaningful
1731 information. Include DSA version that prints out the signature
1735 *) Password based recipient info support for CMS library: implementing
1739 *) Split password based encryption into PBES2 and PBKDF2 functions. This
1740 neatly separates the code into cipher and PBE sections and is required
1741 for some algorithms that split PBES2 into separate pieces (such as
1742 password based CMS).
1745 *) Session-handling fixes:
1746 - Fix handling of connections that are resuming with a session ID,
1747 but also support Session Tickets.
1748 - Fix a bug that suppressed issuing of a new ticket if the client
1749 presented a ticket with an expired session.
1750 - Try to set the ticket lifetime hint to something reasonable.
1751 - Make tickets shorter by excluding irrelevant information.
1752 - On the client side, don't ignore renewed tickets.
1753 [Adam Langley, Bodo Moeller (Google)]
1755 *) Fix PSK session representation.
1758 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
1760 This work was sponsored by Intel.
1763 *) Add GCM support to TLS library. Some custom code is needed to split
1764 the IV between the fixed (from PRF) and explicit (from TLS record)
1765 portions. This adds all GCM ciphersuites supported by RFC5288 and
1766 RFC5289. Generalise some AES* cipherstrings to include GCM and
1767 add a special AESGCM string for GCM only.
1770 *) Expand range of ctrls for AES GCM. Permit setting invocation
1771 field on decrypt and retrieval of invocation field only on encrypt.
1774 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
1775 As required by RFC5289 these ciphersuites cannot be used if for
1776 versions of TLS earlier than 1.2.
1779 *) For FIPS capable OpenSSL interpret a NULL default public key method
1780 as unset and return the appropriate default but do *not* set the default.
1781 This means we can return the appropriate method in applications that
1782 switch between FIPS and non-FIPS modes.
1785 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
1786 ENGINE is used then we cannot handle that in the FIPS module so we
1787 keep original code iff non-FIPS operations are allowed.
1790 *) Add -attime option to openssl utilities.
1791 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
1793 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
1796 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
1797 FIPS EC methods unconditionally for now.
1800 *) New build option no-ec2m to disable characteristic 2 code.
1803 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
1804 all cases can be covered as some introduce binary incompatibilities.
1807 *) Redirect RSA operations to FIPS module including keygen,
1808 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
1811 *) Add similar low level API blocking to ciphers.
1814 *) Low level digest APIs are not approved in FIPS mode: any attempt
1815 to use these will cause a fatal error. Applications that *really* want
1816 to use them can use the private_* version instead.
1819 *) Redirect cipher operations to FIPS module for FIPS builds.
1822 *) Redirect digest operations to FIPS module for FIPS builds.
1825 *) Update build system to add "fips" flag which will link in fipscanister.o
1826 for static and shared library builds embedding a signature if needed.
1829 *) Output TLS supported curves in preference order instead of numerical
1830 order. This is currently hardcoded for the highest order curves first.
1831 This should be configurable so applications can judge speed vs strength.
1834 *) Add TLS v1.2 server support for client authentication.
1837 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
1841 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
1842 FIPS modules versions.
1845 *) Add TLS v1.2 client side support for client authentication. Keep cache
1846 of handshake records longer as we don't know the hash algorithm to use
1847 until after the certificate request message is received.
1850 *) Initial TLS v1.2 client support. Add a default signature algorithms
1851 extension including all the algorithms we support. Parse new signature
1852 format in client key exchange. Relax some ECC signing restrictions for
1853 TLS v1.2 as indicated in RFC5246.
1856 *) Add server support for TLS v1.2 signature algorithms extension. Switch
1857 to new signature format when needed using client digest preference.
1858 All server ciphersuites should now work correctly in TLS v1.2. No client
1859 support yet and no support for client certificates.
1862 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
1863 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
1864 ciphersuites. At present only RSA key exchange ciphersuites work with
1865 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
1866 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
1867 and version checking.
1870 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
1871 with this defined it will not be affected by any changes to ssl internal
1872 structures. Add several utility functions to allow openssl application
1873 to work with OPENSSL_NO_SSL_INTERN defined.
1877 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
1879 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
1882 *) Permit abbreviated handshakes when renegotiating using the function
1883 SSL_renegotiate_abbreviated().
1884 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1886 *) Add call to ENGINE_register_all_complete() to
1887 ENGINE_load_builtin_engines(), so some implementations get used
1888 automatically instead of needing explicit application support.
1891 *) Add support for TLS key exporter as described in RFC5705.
1892 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
1894 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
1895 a few changes are required:
1897 Add SSL_OP_NO_TLSv1_1 flag.
1898 Add TLSv1_1 methods.
1899 Update version checking logic to handle version 1.1.
1900 Add explicit IV handling (ported from DTLS code).
1901 Add command line options to s_client/s_server.
1904 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
1906 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
1907 in CMS and PKCS7 code. When RSA decryption fails use a random key for
1908 content decryption and always return the same error. Note: this attack
1909 needs on average 2^20 messages so it only affects automated senders. The
1910 old behaviour can be reenabled in the CMS code by setting the
1911 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
1912 an MMA defence is not necessary.
1913 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
1914 this issue. (CVE-2012-0884)
1917 *) Fix CVE-2011-4619: make sure we really are receiving a
1918 client hello before rejecting multiple SGC restarts. Thanks to
1919 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
1922 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
1924 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1925 Thanks to Antonio Martin, Enterprise Secure Access Research and
1926 Development, Cisco Systems, Inc. for discovering this bug and
1927 preparing a fix. (CVE-2012-0050)
1930 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
1932 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1933 of the Vaudenay padding oracle attack on CBC mode encryption
1934 which enables an efficient plaintext recovery attack against
1935 the OpenSSL implementation of DTLS. Their attack exploits timing
1936 differences arising during decryption processing. A research
1937 paper describing this attack can be found at:
1938 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1939 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1940 Security Group at Royal Holloway, University of London
1941 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1942 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1943 for preparing the fix. (CVE-2011-4108)
1944 [Robin Seggelmann, Michael Tuexen]
1946 *) Clear bytes used for block padding of SSL 3.0 records.
1948 [Adam Langley (Google)]
1950 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1951 Kadianakis <desnacked@gmail.com> for discovering this issue and
1952 Adam Langley for preparing the fix. (CVE-2011-4619)
1953 [Adam Langley (Google)]
1955 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
1956 [Andrey Kulikov <amdeich@gmail.com>]
1958 *) Prevent malformed RFC3779 data triggering an assertion failure.
1959 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1960 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1961 [Rob Austein <sra@hactrn.net>]
1963 *) Improved PRNG seeding for VOS.
1964 [Paul Green <Paul.Green@stratus.com>]
1966 *) Fix ssl_ciph.c set-up race.
1967 [Adam Langley (Google)]
1969 *) Fix spurious failures in ecdsatest.c.
1970 [Emilia Käsper (Google)]
1972 *) Fix the BIO_f_buffer() implementation (which was mixing different
1973 interpretations of the '..._len' fields).
1974 [Adam Langley (Google)]
1976 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1977 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1978 threads won't reuse the same blinding coefficients.
1980 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1981 lock to call BN_BLINDING_invert_ex, and avoids one use of
1982 BN_BLINDING_update for each BN_BLINDING structure (previously,
1983 the last update always remained unused).
1984 [Emilia Käsper (Google)]
1986 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
1987 [Bob Buckholz (Google)]
1989 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
1991 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
1992 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
1993 [Kaspar Brand <ossl@velox.ch>]
1995 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1996 for multi-threaded use of ECDH. (CVE-2011-3210)
1997 [Adam Langley (Google)]
1999 *) Fix x509_name_ex_d2i memory leak on bad inputs.
2002 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
2003 signature public key algorithm by using OID xref utilities instead.
2004 Before this you could only use some ECC ciphersuites with SHA1 only.
2007 *) Add protection against ECDSA timing attacks as mentioned in the paper
2008 by Billy Bob Brumley and Nicola Tuveri, see:
2010 http://eprint.iacr.org/2011/232.pdf
2012 [Billy Bob Brumley and Nicola Tuveri]
2014 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
2016 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
2017 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
2019 *) Fix bug in string printing code: if *any* escaping is enabled we must
2020 escape the escape character (backslash) or the resulting string is
2024 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
2026 *) Disable code workaround for ancient and obsolete Netscape browsers
2027 and servers: an attacker can use it in a ciphersuite downgrade attack.
2028 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
2031 *) Fixed J-PAKE implementation error, originally discovered by
2032 Sebastien Martini, further info and confirmation from Stefan
2033 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
2036 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
2038 *) Fix extension code to avoid race conditions which can result in a buffer
2039 overrun vulnerability: resumed sessions must not be modified as they can
2040 be shared by multiple threads. CVE-2010-3864
2043 *) Fix WIN32 build system to correctly link an ENGINE directory into
2047 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
2049 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
2051 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
2053 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
2055 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
2056 context. The operation can be customised via the ctrl mechanism in
2057 case ENGINEs want to include additional functionality.
2060 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
2063 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
2064 output hashes compatible with older versions of OpenSSL.
2065 [Willy Weisz <weisz@vcpc.univie.ac.at>]
2067 *) Fix compression algorithm handling: if resuming a session use the
2068 compression algorithm of the resumed session instead of determining
2069 it from client hello again. Don't allow server to change algorithm.
2072 *) Add load_crls() function to apps tidying load_certs() too. Add option
2073 to verify utility to allow additional CRLs to be included.
2076 *) Update OCSP request code to permit adding custom headers to the request:
2077 some responders need this.
2080 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
2082 [Julia Lawall <julia@diku.dk>]
2084 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
2085 needlessly dereferenced structures, used obsolete functions and
2086 didn't handle all updated verify codes correctly.
2089 *) Disable MD2 in the default configuration.
2092 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
2093 indicate the initial BIO being pushed or popped. This makes it possible
2094 to determine whether the BIO is the one explicitly called or as a result
2095 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
2096 it handles reference counts correctly and doesn't zero out the I/O bio
2097 when it is not being explicitly popped. WARNING: applications which
2098 included workarounds for the old buggy behaviour will need to be modified
2099 or they could free up already freed BIOs.
2102 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
2103 renaming to all platforms (within the 0.9.8 branch, this was
2104 done conditionally on Netware platforms to avoid a name clash).
2105 [Guenter <lists@gknw.net>]
2107 *) Add ECDHE and PSK support to DTLS.
2108 [Michael Tuexen <tuexen@fh-muenster.de>]
2110 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
2114 *) Add "missing" function EVP_MD_flags() (without this the only way to
2115 retrieve a digest flags is by accessing the structure directly. Update
2116 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
2117 or cipher is registered as in the "from" argument. Print out all
2118 registered digests in the dgst usage message instead of manually
2119 attempting to work them out.
2122 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
2123 this allows the use of compression and extensions. Change default cipher
2124 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
2125 by default unless an application cipher string requests it.
2128 *) Alter match criteria in PKCS12_parse(). It used to try to use local
2129 key ids to find matching certificates and keys but some PKCS#12 files
2130 don't follow the (somewhat unwritten) rules and this strategy fails.
2131 Now just gather all certificates together and the first private key
2132 then look for the first certificate that matches the key.
2135 *) Support use of registered digest and cipher names for dgst and cipher
2136 commands instead of having to add each one as a special case. So now
2143 openssl dgst -sha256 foo
2145 and this works for ENGINE based algorithms too.
2149 *) Update Gost ENGINE to support parameter files.
2150 [Victor B. Wagner <vitus@cryptocom.ru>]
2152 *) Support GeneralizedTime in ca utility.
2153 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
2155 *) Enhance the hash format used for certificate directory links. The new
2156 form uses the canonical encoding (meaning equivalent names will work
2157 even if they aren't identical) and uses SHA1 instead of MD5. This form
2158 is incompatible with the older format and as a result c_rehash should
2159 be used to rebuild symbolic links.
2162 *) Make PKCS#8 the default write format for private keys, replacing the
2163 traditional format. This form is standardised, more secure and doesn't
2164 include an implicit MD5 dependency.
2167 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
2168 committed to OpenSSL should pass this lot as a minimum.
2171 *) Add session ticket override functionality for use by EAP-FAST.
2172 [Jouni Malinen <j@w1.fi>]
2174 *) Modify HMAC functions to return a value. Since these can be implemented
2175 in an ENGINE errors can occur.
2178 *) Type-checked OBJ_bsearch_ex.
2181 *) Type-checked OBJ_bsearch. Also some constification necessitated
2182 by type-checking. Still to come: TXT_DB, bsearch(?),
2183 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
2187 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
2188 seconds to a tm structure directly, instead of going through OS
2189 specific date routines. This avoids any issues with OS routines such
2190 as the year 2038 bug. New *_adj() functions for ASN1 time structures
2191 and X509_time_adj_ex() to cover the extended range. The existing
2192 X509_time_adj() is still usable and will no longer have any date issues.
2195 *) Delta CRL support. New use deltas option which will attempt to locate
2196 and search any appropriate delta CRLs available.
2198 This work was sponsored by Google.
2201 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
2202 code and add additional score elements. Validate alternate CRL paths
2203 as part of the CRL checking and indicate a new error "CRL path validation
2204 error" in this case. Applications wanting additional details can use
2205 the verify callback and check the new "parent" field. If this is not
2206 NULL CRL path validation is taking place. Existing applications wont
2207 see this because it requires extended CRL support which is off by
2210 This work was sponsored by Google.
2213 *) Support for freshest CRL extension.
2215 This work was sponsored by Google.
2218 *) Initial indirect CRL support. Currently only supported in the CRLs
2219 passed directly and not via lookup. Process certificate issuer
2220 CRL entry extension and lookup CRL entries by bother issuer name
2221 and serial number. Check and process CRL issuer entry in IDP extension.
2223 This work was sponsored by Google.
2226 *) Add support for distinct certificate and CRL paths. The CRL issuer
2227 certificate is validated separately in this case. Only enabled if
2228 an extended CRL support flag is set: this flag will enable additional
2229 CRL functionality in future.
2231 This work was sponsored by Google.
2234 *) Add support for policy mappings extension.
2236 This work was sponsored by Google.
2239 *) Fixes to pathlength constraint, self issued certificate handling,
2240 policy processing to align with RFC3280 and PKITS tests.
2242 This work was sponsored by Google.
2245 *) Support for name constraints certificate extension. DN, email, DNS
2246 and URI types are currently supported.
2248 This work was sponsored by Google.
2251 *) To cater for systems that provide a pointer-based thread ID rather
2252 than numeric, deprecate the current numeric thread ID mechanism and
2253 replace it with a structure and associated callback type. This
2254 mechanism allows a numeric "hash" to be extracted from a thread ID in
2255 either case, and on platforms where pointers are larger than 'long',
2256 mixing is done to help ensure the numeric 'hash' is usable even if it
2257 can't be guaranteed unique. The default mechanism is to use "&errno"
2258 as a pointer-based thread ID to distinguish between threads.
2260 Applications that want to provide their own thread IDs should now use
2261 CRYPTO_THREADID_set_callback() to register a callback that will call
2262 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
2264 Note that ERR_remove_state() is now deprecated, because it is tied
2265 to the assumption that thread IDs are numeric. ERR_remove_state(0)
2266 to free the current thread's error state should be replaced by
2267 ERR_remove_thread_state(NULL).
2269 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
2270 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
2271 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
2272 application was previously providing a numeric thread callback that
2273 was inappropriate for distinguishing threads, then uniqueness might
2274 have been obtained with &errno that happened immediately in the
2275 intermediate development versions of OpenSSL; this is no longer the
2276 case, the numeric thread callback will now override the automatic use
2278 [Geoff Thorpe, with help from Bodo Moeller]
2280 *) Initial support for different CRL issuing certificates. This covers a
2281 simple case where the self issued certificates in the chain exist and
2282 the real CRL issuer is higher in the existing chain.
2284 This work was sponsored by Google.
2287 *) Removed effectively defunct crypto/store from the build.
2290 *) Revamp of STACK to provide stronger type-checking. Still to come:
2291 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
2292 ASN1_STRING, CONF_VALUE.
2295 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
2296 RAM on SSL connections. This option can save about 34k per idle SSL.
2299 *) Revamp of LHASH to provide stronger type-checking. Still to come:
2300 STACK, TXT_DB, bsearch, qsort.
2303 *) Initial support for Cryptographic Message Syntax (aka CMS) based
2304 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
2305 support for data, signedData, compressedData, digestedData and
2306 encryptedData, envelopedData types included. Scripts to check against
2307 RFC4134 examples draft and interop and consistency checks of many
2308 content types and variants.
2311 *) Add options to enc utility to support use of zlib compression BIO.
2314 *) Extend mk1mf to support importing of options and assembly language
2315 files from Configure script, currently only included in VC-WIN32.
2316 The assembly language rules can now optionally generate the source
2317 files from the associated perl scripts.
2320 *) Implement remaining functionality needed to support GOST ciphersuites.
2321 Interop testing has been performed using CryptoPro implementations.
2322 [Victor B. Wagner <vitus@cryptocom.ru>]
2324 *) s390x assembler pack.
2327 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
2331 *) Implement Opaque PRF Input TLS extension as specified in
2332 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
2333 official specification yet and no extension type assignment by
2334 IANA exists, this extension (for now) will have to be explicitly
2335 enabled when building OpenSSL by providing the extension number
2336 to use. For example, specify an option
2338 -DTLSEXT_TYPE_opaque_prf_input=0x9527
2340 to the "config" or "Configure" script to enable the extension,
2341 assuming extension number 0x9527 (which is a completely arbitrary
2342 and unofficial assignment based on the MD5 hash of the Internet
2343 Draft). Note that by doing so, you potentially lose
2344 interoperability with other TLS implementations since these might
2345 be using the same extension number for other purposes.
2347 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
2348 opaque PRF input value to use in the handshake. This will create
2349 an interal copy of the length-'len' string at 'src', and will
2350 return non-zero for success.
2352 To get more control and flexibility, provide a callback function
2355 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
2356 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
2360 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
2363 Callback function 'cb' will be called in handshakes, and is
2364 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
2365 Argument 'arg' is for application purposes (the value as given to
2366 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
2367 be provided to the callback function). The callback function
2368 has to return non-zero to report success: usually 1 to use opaque
2369 PRF input just if possible, or 2 to enforce use of the opaque PRF
2370 input. In the latter case, the library will abort the handshake
2371 if opaque PRF input is not successfully negotiated.
2373 Arguments 'peerinput' and 'len' given to the callback function
2374 will always be NULL and 0 in the case of a client. A server will
2375 see the client's opaque PRF input through these variables if
2376 available (NULL and 0 otherwise). Note that if the server
2377 provides an opaque PRF input, the length must be the same as the
2378 length of the client's opaque PRF input.
2380 Note that the callback function will only be called when creating
2381 a new session (session resumption can resume whatever was
2382 previously negotiated), and will not be called in SSL 2.0
2383 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
2384 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
2385 for applications that need to enforce opaque PRF input.
2389 *) Update ssl code to support digests other than SHA1+MD5 for handshake
2392 [Victor B. Wagner <vitus@cryptocom.ru>]
2394 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2395 RFC4507bis. The encrypted ticket format is an encrypted encoded
2396 SSL_SESSION structure, that way new session features are automatically
2399 If a client application caches session in an SSL_SESSION structure
2400 support is transparent because tickets are now stored in the encoded
2403 The SSL_CTX structure automatically generates keys for ticket
2404 protection in servers so again support should be possible
2405 with no application modification.
2407 If a client or server wishes to disable RFC4507 support then the option
2408 SSL_OP_NO_TICKET can be set.
2410 Add a TLS extension debugging callback to allow the contents of any client
2411 or server extensions to be examined.
2413 This work was sponsored by Google.
2416 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
2417 OpenSSL should now compile cleanly on gcc 4.2
2418 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
2420 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
2421 support including streaming MAC support: this is required for GOST
2422 ciphersuite support.
2423 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
2425 *) Add option -stream to use PKCS#7 streaming in smime utility. New
2426 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
2427 to output in BER and PEM format.
2430 *) Experimental support for use of HMAC via EVP_PKEY interface. This
2431 allows HMAC to be handled via the EVP_DigestSign*() interface. The
2432 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
2433 ENGINE support for HMAC keys which are unextractable. New -mac and
2434 -macopt options to dgst utility.
2437 *) New option -sigopt to dgst utility. Update dgst to use
2438 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
2439 alternative signing paramaters such as X9.31 or PSS in the dgst
2443 *) Change ssl_cipher_apply_rule(), the internal function that does
2444 the work each time a ciphersuite string requests enabling
2445 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
2446 removing ("!foo+bar") a class of ciphersuites: Now it maintains
2447 the order of disabled ciphersuites such that those ciphersuites
2448 that most recently went from enabled to disabled not only stay
2449 in order with respect to each other, but also have higher priority
2450 than other disabled ciphersuites the next time ciphersuites are
2453 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
2454 the same ciphersuites as with "HIGH" alone, but in a specific
2455 order where the PSK ciphersuites come first (since they are the
2456 most recently disabled ciphersuites when "HIGH" is parsed).
2458 Also, change ssl_create_cipher_list() (using this new
2459 funcionality) such that between otherwise identical
2460 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
2464 *) Change ssl_create_cipher_list() so that it automatically
2465 arranges the ciphersuites in reasonable order before starting
2466 to process the rule string. Thus, the definition for "DEFAULT"
2467 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
2468 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
2469 This makes it much easier to arrive at a reasonable default order
2470 in applications for which anonymous ciphers are OK (meaning
2471 that you can't actually use DEFAULT).
2472 [Bodo Moeller; suggested by Victor Duchovni]
2474 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
2475 processing) into multiple integers instead of setting
2476 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
2477 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
2478 (These masks as well as the individual bit definitions are hidden
2479 away into the non-exported interface ssl/ssl_locl.h, so this
2480 change to the definition of the SSL_CIPHER structure shouldn't
2481 affect applications.) This give us more bits for each of these
2482 categories, so there is no longer a need to coagulate AES128 and
2483 AES256 into a single algorithm bit, and to coagulate Camellia128
2484 and Camellia256 into a single algorithm bit, which has led to all
2487 Thus, among other things, the kludge introduced in 0.9.7m and
2488 0.9.8e for masking out AES256 independently of AES128 or masking
2489 out Camellia256 independently of AES256 is not needed here in 0.9.9.
2491 With the change, we also introduce new ciphersuite aliases that
2492 so far were missing: "AES128", "AES256", "CAMELLIA128", and
2496 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
2497 Use the leftmost N bytes of the signature input if the input is
2498 larger than the prime q (with N being the size in bytes of q).
2501 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
2502 it yet and it is largely untested.
2505 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
2508 *) Initial incomplete changes to avoid need for function casts in OpenSSL
2509 some compilers (gcc 4.2 and later) reject their use. Safestack is
2510 reimplemented. Update ASN1 to avoid use of legacy functions.
2513 *) Win32/64 targets are linked with Winsock2.
2516 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
2517 to external functions. This can be used to increase CRL handling
2518 efficiency especially when CRLs are very large by (for example) storing
2519 the CRL revoked certificates in a database.
2522 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
2523 new CRLs added to a directory can be used. New command line option
2524 -verify_return_error to s_client and s_server. This causes real errors
2525 to be returned by the verify callback instead of carrying on no matter
2526 what. This reflects the way a "real world" verify callback would behave.
2529 *) GOST engine, supporting several GOST algorithms and public key formats.
2530 Kindly donated by Cryptocom.
2533 *) Partial support for Issuing Distribution Point CRL extension. CRLs
2534 partitioned by DP are handled but no indirect CRL or reason partitioning
2535 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
2536 selected via a scoring technique which handles IDP and AKID in CRLs.
2539 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
2540 will ultimately be used for all verify operations: this will remove the
2541 X509_STORE dependency on certificate verification and allow alternative
2542 lookup methods. X509_STORE based implementations of these two callbacks.
2545 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
2546 Modify get_crl() to find a valid (unexpired) CRL if possible.
2549 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
2550 this would be called X509_CRL_cmp() but that name is already used by
2551 a function that just compares CRL issuer names. Cache several CRL
2552 extensions in X509_CRL structure and cache CRLDP in X509.
2555 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
2556 this maps equivalent X509_NAME structures into a consistent structure.
2557 Name comparison can then be performed rapidly using memcmp().
2560 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
2564 *) Allow digests to supply their own micalg string for S/MIME type using
2565 the ctrl EVP_MD_CTRL_MICALG.
2568 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
2569 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
2570 ctrl. It can then customise the structure before and/or after signing
2574 *) New function OBJ_add_sigid() to allow application defined signature OIDs
2575 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
2576 to free up any added signature OIDs.
2579 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
2580 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
2581 digest and cipher tables. New options added to openssl utility:
2582 list-message-digest-algorithms and list-cipher-algorithms.
2585 *) Change the array representation of binary polynomials: the list
2586 of degrees of non-zero coefficients is now terminated with -1.
2587 Previously it was terminated with 0, which was also part of the
2588 value; thus, the array representation was not applicable to
2589 polynomials where t^0 has coefficient zero. This change makes
2590 the array representation useful in a more general context.
2593 *) Various modifications and fixes to SSL/TLS cipher string
2594 handling. For ECC, the code now distinguishes between fixed ECDH
2595 with RSA certificates on the one hand and with ECDSA certificates
2596 on the other hand, since these are separate ciphersuites. The
2597 unused code for Fortezza ciphersuites has been removed.
2599 For consistency with EDH, ephemeral ECDH is now called "EECDH"
2600 (not "ECDHE"). For consistency with the code for DH
2601 certificates, use of ECDH certificates is now considered ECDH
2602 authentication, not RSA or ECDSA authentication (the latter is
2603 merely the CA's signing algorithm and not actively used in the
2606 The temporary ciphersuite alias "ECCdraft" is no longer
2607 available, and ECC ciphersuites are no longer excluded from "ALL"
2608 and "DEFAULT". The following aliases now exist for RFC 4492
2609 ciphersuites, most of these by analogy with the DH case:
2611 kECDHr - ECDH cert, signed with RSA
2612 kECDHe - ECDH cert, signed with ECDSA
2613 kECDH - ECDH cert (signed with either RSA or ECDSA)
2614 kEECDH - ephemeral ECDH
2615 ECDH - ECDH cert or ephemeral ECDH
2621 AECDH - anonymous ECDH
2622 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
2626 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
2627 Use correct micalg parameters depending on digest(s) in signed message.
2630 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
2631 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
2634 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
2635 an engine to register a method. Add ENGINE lookups for methods and
2636 functional reference processing.
2639 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
2640 EVP_{Sign,Verify}* which allow an application to customise the signature
2644 *) New -resign option to smime utility. This adds one or more signers
2645 to an existing PKCS#7 signedData structure. Also -md option to use an
2646 alternative message digest algorithm for signing.
2649 *) Tidy up PKCS#7 routines and add new functions to make it easier to
2650 create PKCS7 structures containing multiple signers. Update smime
2651 application to support multiple signers.
2654 *) New -macalg option to pkcs12 utility to allow setting of an alternative
2658 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
2659 Reorganize PBE internals to lookup from a static table using NIDs,
2660 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
2661 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
2662 PRF which will be automatically used with PBES2.
2665 *) Replace the algorithm specific calls to generate keys in "req" with the
2669 *) Update PKCS#7 enveloped data routines to use new API. This is now
2670 supported by any public key method supporting the encrypt operation. A
2671 ctrl is added to allow the public key algorithm to examine or modify
2672 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
2676 *) Add a ctrl to asn1 method to allow a public key algorithm to express
2677 a default digest type to use. In most cases this will be SHA1 but some
2678 algorithms (such as GOST) need to specify an alternative digest. The
2679 return value indicates how strong the preference is 1 means optional and
2680 2 is mandatory (that is it is the only supported type). Modify
2681 ASN1_item_sign() to accept a NULL digest argument to indicate it should
2682 use the default md. Update openssl utilities to use the default digest
2683 type for signing if it is not explicitly indicated.
2686 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
2687 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
2688 signing method from the key type. This effectively removes the link
2689 between digests and public key types.
2692 *) Add an OID cross reference table and utility functions. Its purpose is to
2693 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
2694 rsaEncryption. This will allow some of the algorithm specific hackery
2695 needed to use the correct OID to be removed.
2698 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
2699 structures for PKCS7_sign(). They are now set up by the relevant public
2703 *) Add provisional EC pkey method with support for ECDSA and ECDH.
2706 *) Add support for key derivation (agreement) in the API, DH method and
2710 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
2711 public and private key formats. As a side effect these add additional
2712 command line functionality not previously available: DSA signatures can be
2713 generated and verified using pkeyutl and DH key support and generation in
2718 [Oliver Tappe <zooey@hirschkaefer.de>]
2720 *) New make target "install_html_docs" installs HTML renditions of the
2722 [Oliver Tappe <zooey@hirschkaefer.de>]
2724 *) New utility "genpkey" this is analogous to "genrsa" etc except it can
2725 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
2726 support key and parameter generation and add initial key generation
2727 functionality for RSA.
2730 *) Add functions for main EVP_PKEY_method operations. The undocumented
2731 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
2732 EVP_PKEY_{encrypt,decrypt}_old.
2735 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
2736 key API, doesn't do much yet.
2739 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
2740 public key algorithms. New option to openssl utility:
2741 "list-public-key-algorithms" to print out info.
2744 *) Implement the Supported Elliptic Curves Extension for
2745 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2748 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
2749 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
2752 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
2753 utilities such as rsa, dsa, dsaparam etc except they process any key
2757 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
2758 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
2759 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
2763 *) Initial support for pluggable public key ASN1.
2764 De-spaghettify the public key ASN1 handling. Move public and private
2765 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
2766 algorithm specific handling to a single module within the relevant
2767 algorithm directory. Add functions to allow (near) opaque processing
2768 of public and private key structures.
2771 *) Implement the Supported Point Formats Extension for
2772 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2775 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
2776 for the psk identity [hint] and the psk callback functions to the
2777 SSL_SESSION, SSL and SSL_CTX structure.
2780 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
2784 SSL_CTX_use_psk_identity_hint
2785 SSL_get_psk_identity_hint
2786 SSL_get_psk_identity
2787 SSL_use_psk_identity_hint
2789 [Mika Kousa and Pasi Eronen of Nokia Corporation]
2791 *) Add RFC 3161 compliant time stamp request creation, response generation
2792 and response verification functionality.
2793 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
2795 *) Add initial support for TLS extensions, specifically for the server_name
2796 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2797 have new members for a host name. The SSL data structure has an
2798 additional member SSL_CTX *initial_ctx so that new sessions can be
2799 stored in that context to allow for session resumption, even after the
2800 SSL has been switched to a new SSL_CTX in reaction to a client's
2801 server_name extension.
2803 New functions (subject to change):
2805 SSL_get_servername()
2806 SSL_get_servername_type()
2809 New CTRL codes and macros (subject to change):
2811 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2812 - SSL_CTX_set_tlsext_servername_callback()
2813 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2814 - SSL_CTX_set_tlsext_servername_arg()
2815 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2817 openssl s_client has a new '-servername ...' option.
2819 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2820 '-key2 ...', '-servername_fatal' (subject to change). This allows
2821 testing the HostName extension for a specific single host name ('-cert'
2822 and '-key' remain fallbacks for handshakes without HostName
2823 negotiation). If the unrecognized_name alert has to be sent, this by
2824 default is a warning; it becomes fatal with the '-servername_fatal'
2827 [Peter Sylvester, Remy Allais, Christophe Renou]
2829 *) Whirlpool hash implementation is added.
2832 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
2833 bn(64,32). Because of instruction set limitations it doesn't have
2834 any negative impact on performance. This was done mostly in order
2835 to make it possible to share assembler modules, such as bn_mul_mont
2836 implementations, between 32- and 64-bit builds without hassle.
2839 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
2840 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
2844 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
2845 dedicated Montgomery multiplication procedure, is introduced.
2846 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
2847 "64-bit" performance on certain 32-bit targets.
2850 *) New option SSL_OP_NO_COMP to disable use of compression selectively
2851 in SSL structures. New SSL ctrl to set maximum send fragment size.
2852 Save memory by seeting the I/O buffer sizes dynamically instead of
2853 using the maximum available value.
2856 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
2857 in addition to the text details.
2860 *) Very, very preliminary EXPERIMENTAL support for printing of general
2861 ASN1 structures. This currently produces rather ugly output and doesn't
2862 handle several customised structures at all.
2865 *) Integrated support for PVK file format and some related formats such
2866 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
2867 these in the 'rsa' and 'dsa' utilities.
2870 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
2873 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
2874 place for the (very old) "NETSCAPE" format certificates which are now
2875 handled using new ASN1 code equivalents.
2878 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
2879 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
2880 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
2883 *) Modify CRL distribution points extension code to print out previously
2884 unsupported fields. Enhance extension setting code to allow setting of
2888 *) Add print and set support for Issuing Distribution Point CRL extension.
2891 *) Change 'Configure' script to enable Camellia by default.
2894 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
2896 *) When rejecting SSL/TLS records due to an incorrect version number, never
2897 update s->server with a new major version number. As of
2898 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
2899 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
2900 the previous behavior could result in a read attempt at NULL when
2901 receiving specific incorrect SSL/TLS records once record payload
2902 protection is active. (CVE-2010-0740)
2903 [Bodo Moeller, Adam Langley <agl@chromium.org>]
2905 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
2906 could be crashed if the relevant tables were not present (e.g. chrooted).
2907 [Tomas Hoger <thoger@redhat.com>]
2909 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
2911 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
2912 [Martin Olsson, Neel Mehta]
2914 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
2915 accommodate for stack sorting, always a write lock!).
2918 *) On some versions of WIN32 Heap32Next is very slow. This can cause
2919 excessive delays in the RAND_poll(): over a minute. As a workaround
2920 include a time check in the inner Heap32Next loop too.
2923 *) The code that handled flushing of data in SSL/TLS originally used the
2924 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
2925 the problem outlined in PR#1949. The fix suggested there however can
2926 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
2927 of Apache). So instead simplify the code to flush unconditionally.
2928 This should be fine since flushing with no data to flush is a no op.
2931 *) Handle TLS versions 2.0 and later properly and correctly use the
2932 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
2933 off ancient servers have a habit of sticking around for a while...
2936 *) Modify compression code so it frees up structures without using the
2937 ex_data callbacks. This works around a problem where some applications
2938 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
2939 restarting) then use compression (e.g. SSL with compression) later.
2940 This results in significant per-connection memory leaks and
2941 has caused some security issues including CVE-2008-1678 and
2945 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
2946 change when encrypting or decrypting.
2949 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
2950 connect and renegotiate with servers which do not support RI.
2951 Until RI is more widely deployed this option is enabled by default.
2954 *) Add "missing" ssl ctrls to clear options and mode.
2957 *) If client attempts to renegotiate and doesn't support RI respond with
2958 a no_renegotiation alert as required by RFC5746. Some renegotiating
2959 TLS clients will continue a connection gracefully when they receive
2960 the alert. Unfortunately OpenSSL mishandled this alert and would hang
2961 waiting for a server hello which it will never receive. Now we treat a
2962 received no_renegotiation alert as a fatal error. This is because
2963 applications requesting a renegotiation might well expect it to succeed
2964 and would have no code in place to handle the server denying it so the
2965 only safe thing to do is to terminate the connection.
2968 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
2969 peer supports secure renegotiation and 0 otherwise. Print out peer
2970 renegotiation support in s_client/s_server.
2973 *) Replace the highly broken and deprecated SPKAC certification method with
2974 the updated NID creation version. This should correctly handle UTF8.
2977 *) Implement RFC5746. Re-enable renegotiation but require the extension
2978 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
2979 turns out to be a bad idea. It has been replaced by
2980 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
2981 SSL_CTX_set_options(). This is really not recommended unless you
2982 know what you are doing.
2983 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
2985 *) Fixes to stateless session resumption handling. Use initial_ctx when
2986 issuing and attempting to decrypt tickets in case it has changed during
2987 servername handling. Use a non-zero length session ID when attempting
2988 stateless session resumption: this makes it possible to determine if
2989 a resumption has occurred immediately after receiving server hello
2990 (several places in OpenSSL subtly assume this) instead of later in
2994 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
2995 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
2996 fixes for a few places where the return code is not checked
2998 [Julia Lawall <julia@diku.dk>]
3000 *) Add --strict-warnings option to Configure script to include devteam
3001 warnings in other configurations.
3004 *) Add support for --libdir option and LIBDIR variable in makefiles. This
3005 makes it possible to install openssl libraries in locations which
3006 have names other than "lib", for example "/usr/lib64" which some
3008 [Steve Henson, based on patch from Jeremy Utley]
3010 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
3011 X690 8.9.12 and can produce some misleading textual output of OIDs.
3012 [Steve Henson, reported by Dan Kaminsky]
3014 *) Delete MD2 from algorithm tables. This follows the recommendation in
3015 several standards that it is not used in new applications due to
3016 several cryptographic weaknesses. For binary compatibility reasons
3017 the MD2 API is still compiled in by default.
3020 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
3024 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
3025 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
3027 [Guenter <lists@gknw.net>]
3029 *) Fix the server certificate chain building code to use X509_verify_cert(),
3030 it used to have an ad-hoc builder which was unable to cope with anything
3031 other than a simple chain.
3032 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
3034 *) Don't check self signed certificate signatures in X509_verify_cert()
3035 by default (a flag can override this): it just wastes time without
3036 adding any security. As a useful side effect self signed root CAs
3037 with non-FIPS digests are now usable in FIPS mode.
3040 *) In dtls1_process_out_of_seq_message() the check if the current message
3041 is already buffered was missing. For every new message was memory
3042 allocated, allowing an attacker to perform an denial of service attack
3043 with sending out of seq handshake messages until there is no memory
3044 left. Additionally every future messege was buffered, even if the
3045 sequence number made no sense and would be part of another handshake.
3046 So only messages with sequence numbers less than 10 in advance will be
3047 buffered. (CVE-2009-1378)
3048 [Robin Seggelmann, discovered by Daniel Mentz]
3050 *) Records are buffered if they arrive with a future epoch to be
3051 processed after finishing the corresponding handshake. There is
3052 currently no limitation to this buffer allowing an attacker to perform
3053 a DOS attack with sending records with future epochs until there is no
3054 memory left. This patch adds the pqueue_size() function to determine
3055 the size of a buffer and limits the record buffer to 100 entries.
3057 [Robin Seggelmann, discovered by Daniel Mentz]
3059 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
3060 parent structure is freed. (CVE-2009-1379)
3063 *) Handle non-blocking I/O properly in SSL_shutdown() call.
3064 [Darryl Miles <darryl-mailinglists@netbauds.net>]
3067 [Ilya O. <vrghost@gmail.com>]
3069 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
3071 *) Disable renegotiation completely - this fixes a severe security
3072 problem (CVE-2009-3555) at the cost of breaking all
3073 renegotiation. Renegotiation can be re-enabled by setting
3074 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
3075 run-time. This is really not recommended unless you know what
3079 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
3081 *) Don't set val to NULL when freeing up structures, it is freed up by
3082 underlying code. If sizeof(void *) > sizeof(long) this can result in
3083 zeroing past the valid field. (CVE-2009-0789)
3084 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
3086 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
3087 checked correctly. This would allow some invalid signed attributes to
3088 appear to verify correctly. (CVE-2009-0591)
3089 [Ivan Nestlerode <inestlerode@us.ibm.com>]
3091 *) Reject UniversalString and BMPString types with invalid lengths. This
3092 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
3093 a legal length. (CVE-2009-0590)
3096 *) Set S/MIME signing as the default purpose rather than setting it
3097 unconditionally. This allows applications to override it at the store
3101 *) Permit restricted recursion of ASN1 strings. This is needed in practice
3102 to handle some structures.
3105 *) Improve efficiency of mem_gets: don't search whole buffer each time
3107 [Jeremy Shapiro <jnshapir@us.ibm.com>]
3109 *) New -hex option for openssl rand.
3112 *) Print out UTF8String and NumericString when parsing ASN1.
3115 *) Support NumericString type for name components.
3118 *) Allow CC in the environment to override the automatically chosen
3119 compiler. Note that nothing is done to ensure flags work with the
3123 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
3125 *) Properly check EVP_VerifyFinal() and similar return values
3127 [Ben Laurie, Bodo Moeller, Google Security Team]
3129 *) Enable TLS extensions by default.
3132 *) Allow the CHIL engine to be loaded, whether the application is
3133 multithreaded or not. (This does not release the developer from the
3134 obligation to set up the dynamic locking callbacks.)
3135 [Sander Temme <sander@temme.net>]
3137 *) Use correct exit code if there is an error in dgst command.
3138 [Steve Henson; problem pointed out by Roland Dirlewanger]
3140 *) Tweak Configure so that you need to say "experimental-jpake" to enable
3141 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
3144 *) Add experimental JPAKE support, including demo authentication in
3145 s_client and s_server.
3148 *) Set the comparison function in v3_addr_canonize().
3149 [Rob Austein <sra@hactrn.net>]
3151 *) Add support for XMPP STARTTLS in s_client.
3152 [Philip Paeps <philip@freebsd.org>]
3154 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
3155 to ensure that even with this option, only ciphersuites in the
3156 server's preference list will be accepted. (Note that the option
3157 applies only when resuming a session, so the earlier behavior was
3158 just about the algorithm choice for symmetric cryptography.)
3161 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
3163 *) Fix NULL pointer dereference if a DTLS server received
3164 ChangeCipherSpec as first record (CVE-2009-1386).
3167 *) Fix a state transition in s3_srvr.c and d1_srvr.c
3168 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
3171 *) The fix in 0.9.8c that supposedly got rid of unsafe
3172 double-checked locking was incomplete for RSA blinding,
3173 addressing just one layer of what turns out to have been
3174 doubly unsafe triple-checked locking.
3176 So now fix this for real by retiring the MONT_HELPER macro
3177 in crypto/rsa/rsa_eay.c.
3179 [Bodo Moeller; problem pointed out by Marius Schilder]
3181 *) Various precautionary measures:
3183 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
3185 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
3186 (NB: This would require knowledge of the secret session ticket key
3187 to exploit, in which case you'd be SOL either way.)
3189 - Change bn_nist.c so that it will properly handle input BIGNUMs
3190 outside the expected range.
3192 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
3195 [Neel Mehta, Bodo Moeller]
3197 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
3198 the load fails. Useful for distros.
3199 [Ben Laurie and the FreeBSD team]
3201 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
3204 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
3207 *) Expand ENGINE to support engine supplied SSL client certificate functions.
3209 This work was sponsored by Logica.
3212 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
3213 keystores. Support for SSL/TLS client authentication too.
3214 Not compiled unless enable-capieng specified to Configure.
3216 This work was sponsored by Logica.
3219 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
3220 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
3221 attribute creation routines such as certifcate requests and PKCS#12
3225 Changes between 0.9.8g and 0.9.8h [28 May 2008]
3227 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
3228 handshake which could lead to a cilent crash as found using the
3229 Codenomicon TLS test suite (CVE-2008-1672)
3230 [Steve Henson, Mark Cox]
3232 *) Fix double free in TLS server name extensions which could lead to
3233 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
3236 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
3238 Clear the error queue to ensure that error entries left from
3239 older function calls do not interfere with the correct operation.
3240 [Lutz Jaenicke, Erik de Castro Lopo]
3242 *) Remove root CA certificates of commercial CAs:
3244 The OpenSSL project does not recommend any specific CA and does not
3245 have any policy with respect to including or excluding any CA.
3246 Therefore it does not make any sense to ship an arbitrary selection
3247 of root CA certificates with the OpenSSL software.
3250 *) RSA OAEP patches to fix two separate invalid memory reads.
3251 The first one involves inputs when 'lzero' is greater than
3252 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
3253 before the beginning of from). The second one involves inputs where
3254 the 'db' section contains nothing but zeroes (there is a one-byte
3255 invalid read after the end of 'db').
3256 [Ivan Nestlerode <inestlerode@us.ibm.com>]
3258 *) Partial backport from 0.9.9-dev:
3260 Introduce bn_mul_mont (dedicated Montgomery multiplication
3261 procedure) as a candidate for BIGNUM assembler implementation.
3262 While 0.9.9-dev uses assembler for various architectures, only
3263 x86_64 is available by default here in the 0.9.8 branch, and
3264 32-bit x86 is available through a compile-time setting.
3266 To try the 32-bit x86 assembler implementation, use Configure
3267 option "enable-montasm" (which exists only for this backport).
3269 As "enable-montasm" for 32-bit x86 disclaims code stability
3270 anyway, in this constellation we activate additional code
3271 backported from 0.9.9-dev for further performance improvements,
3272 namely BN_from_montgomery_word. (To enable this otherwise,
3273 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
3275 [Andy Polyakov (backport partially by Bodo Moeller)]
3277 *) Add TLS session ticket callback. This allows an application to set
3278 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
3279 values. This is useful for key rollover for example where several key
3280 sets may exist with different names.
3283 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
3284 This was broken until now in 0.9.8 releases, such that the only way
3285 a registered ENGINE could be used (assuming it initialises
3286 successfully on the host) was to explicitly set it as the default
3287 for the relevant algorithms. This is in contradiction with 0.9.7
3288 behaviour and the documentation. With this fix, when an ENGINE is
3289 registered into a given algorithm's table of implementations, the
3290 'uptodate' flag is reset so that auto-discovery will be used next
3291 time a new context for that algorithm attempts to select an
3293 [Ian Lister (tweaked by Geoff Thorpe)]
3295 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
3296 implemention in the following ways:
3298 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
3301 Lack of BER streaming support means one pass streaming processing is
3302 only supported if data is detached: setting the streaming flag is
3303 ignored for embedded content.
3305 CMS support is disabled by default and must be explicitly enabled
3306 with the enable-cms configuration option.
3309 *) Update the GMP engine glue to do direct copies between BIGNUM and
3310 mpz_t when openssl and GMP use the same limb size. Otherwise the
3311 existing "conversion via a text string export" trick is still used.
3312 [Paul Sheer <paulsheer@gmail.com>]
3314 *) Zlib compression BIO. This is a filter BIO which compressed and
3315 uncompresses any data passed through it.
3318 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
3319 RFC3394 compatible AES key wrapping.
3322 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
3323 sets string data without copying. X509_ALGOR_set0() and
3324 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
3325 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
3326 from an X509_ATTRIBUTE structure optionally checking it occurs only
3327 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
3331 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
3332 to get the expected BN_FLG_CONSTTIME behavior.
3333 [Bodo Moeller (Google)]
3337 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
3338 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
3339 - added some more tests to do_tests.pl
3340 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
3341 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
3342 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
3343 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
3344 - various changes to netware.pl to enable gcc-cross builds on Win32
3346 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
3347 - various changes to fix missing prototype warnings
3348 - fixed x86nasm.pl to create correct asm files for NASM COFF output
3349 - added AES, WHIRLPOOL and CPUID assembler code to build files
3350 - added missing AES assembler make rules to mk1mf.pl
3351 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
3352 [Guenter Knauf <eflash@gmx.net>]
3354 *) Implement certificate status request TLS extension defined in RFC3546.
3355 A client can set the appropriate parameters and receive the encoded
3356 OCSP response via a callback. A server can query the supplied parameters
3357 and set the encoded OCSP response in the callback. Add simplified examples
3358 to s_client and s_server.
3361 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
3363 *) Fix various bugs:
3364 + Binary incompatibility of ssl_ctx_st structure
3365 + DTLS interoperation with non-compliant servers
3366 + Don't call get_session_cb() without proposed session
3367 + Fix ia64 assembler code
3368 [Andy Polyakov, Steve Henson]
3370 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
3372 *) DTLS Handshake overhaul. There were longstanding issues with
3373 OpenSSL DTLS implementation, which were making it impossible for
3374 RFC 4347 compliant client to communicate with OpenSSL server.
3375 Unfortunately just fixing these incompatibilities would "cut off"
3376 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
3377 server keeps tolerating non RFC compliant syntax. The opposite is
3378 not true, 0.9.8f client can not communicate with earlier server.
3379 This update even addresses CVE-2007-4995.
3382 *) Changes to avoid need for function casts in OpenSSL: some compilers
3383 (gcc 4.2 and later) reject their use.
3384 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
3387 *) Add RFC4507 support to OpenSSL. This includes the corrections in
3388 RFC4507bis. The encrypted ticket format is an encrypted encoded
3389 SSL_SESSION structure, that way new session features are automatically
3392 If a client application caches session in an SSL_SESSION structure
3393 support is transparent because tickets are now stored in the encoded
3396 The SSL_CTX structure automatically generates keys for ticket
3397 protection in servers so again support should be possible
3398 with no application modification.
3400 If a client or server wishes to disable RFC4507 support then the option
3401 SSL_OP_NO_TICKET can be set.
3403 Add a TLS extension debugging callback to allow the contents of any client
3404 or server extensions to be examined.
3406 This work was sponsored by Google.
3409 *) Add initial support for TLS extensions, specifically for the server_name
3410 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
3411 have new members for a host name. The SSL data structure has an
3412 additional member SSL_CTX *initial_ctx so that new sessions can be
3413 stored in that context to allow for session resumption, even after the
3414 SSL has been switched to a new SSL_CTX in reaction to a client's
3415 server_name extension.
3417 New functions (subject to change):
3419 SSL_get_servername()
3420 SSL_get_servername_type()
3423 New CTRL codes and macros (subject to change):
3425 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
3426 - SSL_CTX_set_tlsext_servername_callback()
3427 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
3428 - SSL_CTX_set_tlsext_servername_arg()
3429 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
3431 openssl s_client has a new '-servername ...' option.
3433 openssl s_server has new options '-servername_host ...', '-cert2 ...',
3434 '-key2 ...', '-servername_fatal' (subject to change). This allows
3435 testing the HostName extension for a specific single host name ('-cert'
3436 and '-key' remain fallbacks for handshakes without HostName
3437 negotiation). If the unrecognized_name alert has to be sent, this by
3438 default is a warning; it becomes fatal with the '-servername_fatal'
3441 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
3443 *) Add AES and SSE2 assembly language support to VC++ build.
3446 *) Mitigate attack on final subtraction in Montgomery reduction.
3449 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
3450 (which previously caused an internal error).
3453 *) Squeeze another 10% out of IGE mode when in != out.
3456 *) AES IGE mode speedup.
3457 [Dean Gaudet (Google)]
3459 *) Add the Korean symmetric 128-bit cipher SEED (see
3460 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
3461 add SEED ciphersuites from RFC 4162:
3463 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
3464 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
3465 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
3466 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
3468 To minimize changes between patchlevels in the OpenSSL 0.9.8
3469 series, SEED remains excluded from compilation unless OpenSSL
3470 is configured with 'enable-seed'.
3471 [KISA, Bodo Moeller]
3473 *) Mitigate branch prediction attacks, which can be practical if a
3474 single processor is shared, allowing a spy process to extract
3475 information. For detailed background information, see
3476 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
3477 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
3478 and Necessary Software Countermeasures"). The core of the change
3479 are new versions BN_div_no_branch() and
3480 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
3481 respectively, which are slower, but avoid the security-relevant
3482 conditional branches. These are automatically called by BN_div()
3483 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
3484 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
3485 remove a conditional branch.
3487 BN_FLG_CONSTTIME is the new name for the previous
3488 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
3489 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
3490 in the exponent causes BN_mod_exp_mont() to use the alternative
3491 implementation in BN_mod_exp_mont_consttime().) The old name
3492 remains as a deprecated alias.
3494 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
3495 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
3496 constant-time implementations for more than just exponentiation.
3497 Here too the old name is kept as a deprecated alias.
3499 BN_BLINDING_new() will now use BN_dup() for the modulus so that
3500 the BN_BLINDING structure gets an independent copy of the
3501 modulus. This means that the previous "BIGNUM *m" argument to
3502 BN_BLINDING_new() and to BN_BLINDING_create_param() now
3503 essentially becomes "const BIGNUM *m", although we can't actually
3504 change this in the header file before 0.9.9. It allows
3505 RSA_setup_blinding() to use BN_with_flags() on the modulus to
3506 enable BN_FLG_CONSTTIME.
3508 [Matthew D Wood (Intel Corp)]
3510 *) In the SSL/TLS server implementation, be strict about session ID
3511 context matching (which matters if an application uses a single
3512 external cache for different purposes). Previously,
3513 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
3514 set. This did ensure strict client verification, but meant that,
3515 with applications using a single external cache for quite
3516 different requirements, clients could circumvent ciphersuite
3517 restrictions for a given session ID context by starting a session
3518 in a different context.
3521 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3522 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3523 authentication-only ciphersuites.
3526 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
3527 not complete and could lead to a possible single byte overflow
3528 (CVE-2007-5135) [Ben Laurie]
3530 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
3532 *) Since AES128 and AES256 (and similarly Camellia128 and
3533 Camellia256) share a single mask bit in the logic of
3534 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3535 kludge to work properly if AES128 is available and AES256 isn't
3536 (or if Camellia128 is available and Camellia256 isn't).
3539 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
3540 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
3541 When a point or a seed is encoded in a BIT STRING, we need to
3542 prevent the removal of trailing zero bits to get the proper DER
3543 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
3544 of a NamedBitList, for which trailing 0 bits need to be removed.)
3547 *) Have SSL/TLS server implementation tolerate "mismatched" record
3548 protocol version while receiving ClientHello even if the
3549 ClientHello is fragmented. (The server can't insist on the
3550 particular protocol version it has chosen before the ServerHello
3551 message has informed the client about his choice.)
3554 *) Add RFC 3779 support.
3555 [Rob Austein for ARIN, Ben Laurie]
3557 *) Load error codes if they are not already present instead of using a
3558 static variable. This allows them to be cleanly unloaded and reloaded.
3559 Improve header file function name parsing.
3562 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
3563 or CAPABILITY handshake as required by RFCs.
3566 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
3568 *) Introduce limits to prevent malicious keys being able to
3569 cause a denial of service. (CVE-2006-2940)
3570 [Steve Henson, Bodo Moeller]
3572 *) Fix ASN.1 parsing of certain invalid structures that can result
3573 in a denial of service. (CVE-2006-2937) [Steve Henson]
3575 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3576 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3578 *) Fix SSL client code which could crash if connecting to a
3579 malicious SSLv2 server. (CVE-2006-4343)
3580 [Tavis Ormandy and Will Drewry, Google Security Team]
3582 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
3583 match only those. Before that, "AES256-SHA" would be interpreted
3584 as a pattern and match "AES128-SHA" too (since AES128-SHA got
3585 the same strength classification in 0.9.7h) as we currently only
3586 have a single AES bit in the ciphersuite description bitmap.
3587 That change, however, also applied to ciphersuite strings such as
3588 "RC4-MD5" that intentionally matched multiple ciphersuites --
3589 namely, SSL 2.0 ciphersuites in addition to the more common ones
3590 from SSL 3.0/TLS 1.0.
3592 So we change the selection algorithm again: Naming an explicit
3593 ciphersuite selects this one ciphersuite, and any other similar
3594 ciphersuite (same bitmap) from *other* protocol versions.
3595 Thus, "RC4-MD5" again will properly select both the SSL 2.0
3596 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
3598 Since SSL 2.0 does not have any ciphersuites for which the
3599 128/256 bit distinction would be relevant, this works for now.
3600 The proper fix will be to use different bits for AES128 and
3601 AES256, which would have avoided the problems from the beginning;
3602 however, bits are scarce, so we can only do this in a new release
3603 (not just a patchlevel) when we can change the SSL_CIPHER
3604 definition to split the single 'unsigned long mask' bitmap into
3605 multiple values to extend the available space.
3609 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
3611 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3612 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3614 *) Add AES IGE and biIGE modes.
3617 *) Change the Unix randomness entropy gathering to use poll() when
3618 possible instead of select(), since the latter has some
3619 undesirable limitations.
3620 [Darryl Miles via Richard Levitte and Bodo Moeller]
3622 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
3623 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
3624 cannot be implicitly activated as part of, e.g., the "AES" alias.
3625 However, please upgrade to OpenSSL 0.9.9[-dev] for
3626 non-experimental use of the ECC ciphersuites to get TLS extension
3627 support, which is required for curve and point format negotiation
3628 to avoid potential handshake problems.
3631 *) Disable rogue ciphersuites:
3633 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3634 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3635 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3637 The latter two were purportedly from
3638 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3641 Also deactivate the remaining ciphersuites from
3642 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3643 unofficial, and the ID has long expired.
3646 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3647 dual-core machines) and other potential thread-safety issues.
3650 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
3651 versions), which is now available for royalty-free use
3652 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
3653 Also, add Camellia TLS ciphersuites from RFC 4132.
3655 To minimize changes between patchlevels in the OpenSSL 0.9.8
3656 series, Camellia remains excluded from compilation unless OpenSSL
3657 is configured with 'enable-camellia'.
3660 *) Disable the padding bug check when compression is in use. The padding
3661 bug check assumes the first packet is of even length, this is not
3662 necessarily true if compresssion is enabled and can result in false
3663 positives causing handshake failure. The actual bug test is ancient
3664 code so it is hoped that implementations will either have fixed it by
3665 now or any which still have the bug do not support compression.
3668 Changes between 0.9.8a and 0.9.8b [04 May 2006]
3670 *) When applying a cipher rule check to see if string match is an explicit
3671 cipher suite and only match that one cipher suite if it is.
3674 *) Link in manifests for VC++ if needed.
3675 [Austin Ziegler <halostatue@gmail.com>]
3677 *) Update support for ECC-based TLS ciphersuites according to
3678 draft-ietf-tls-ecc-12.txt with proposed changes (but without
3679 TLS extensions, which are supported starting with the 0.9.9
3680 branch, not in the OpenSSL 0.9.8 branch).
3683 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
3684 opaque EVP_CIPHER_CTX handling.
3687 *) Fixes and enhancements to zlib compression code. We now only use
3688 "zlib1.dll" and use the default __cdecl calling convention on Win32
3689 to conform with the standards mentioned here:
3690 http://www.zlib.net/DLL_FAQ.txt
3691 Static zlib linking now works on Windows and the new --with-zlib-include
3692 --with-zlib-lib options to Configure can be used to supply the location
3693 of the headers and library. Gracefully handle case where zlib library
3697 *) Several fixes and enhancements to the OID generation code. The old code
3698 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
3699 handle numbers larger than ULONG_MAX, truncated printing and had a
3700 non standard OBJ_obj2txt() behaviour.
3703 *) Add support for building of engines under engine/ as shared libraries
3704 under VC++ build system.
3707 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
3708 Hopefully, we will not see any false combination of paths any more.
3711 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
3713 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3714 (part of SSL_OP_ALL). This option used to disable the
3715 countermeasure against man-in-the-middle protocol-version
3716 rollback in the SSL 2.0 server implementation, which is a bad
3717 idea. (CVE-2005-2969)
3719 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3720 for Information Security, National Institute of Advanced Industrial
3721 Science and Technology [AIST], Japan)]
3723 *) Add two function to clear and return the verify parameter flags.
3726 *) Keep cipherlists sorted in the source instead of sorting them at
3727 runtime, thus removing the need for a lock.
3730 *) Avoid some small subgroup attacks in Diffie-Hellman.
3731 [Nick Mathewson and Ben Laurie]
3733 *) Add functions for well-known primes.
3736 *) Extended Windows CE support.
3737 [Satoshi Nakamura and Andy Polyakov]
3739 *) Initialize SSL_METHOD structures at compile time instead of during
3740 runtime, thus removing the need for a lock.
3743 *) Make PKCS7_decrypt() work even if no certificate is supplied by
3744 attempting to decrypt each encrypted key in turn. Add support to
3748 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
3750 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
3753 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
3756 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
3757 key into the same file any more.
3760 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
3763 *) Add -utf8 command line and config file option to 'ca'.
3764 [Stefan <stf@udoma.org]
3766 *) Removed the macro des_crypt(), as it seems to conflict with some
3767 libraries. Use DES_crypt().
3770 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
3771 involves renaming the source and generated shared-libs for
3772 both. The engines will accept the corrected or legacy ids
3773 ('ncipher' and '4758_cca' respectively) when binding. NB,
3774 this only applies when building 'shared'.
3775 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
3777 *) Add attribute functions to EVP_PKEY structure. Modify
3778 PKCS12_create() to recognize a CSP name attribute and
3779 use it. Make -CSP option work again in pkcs12 utility.
3782 *) Add new functionality to the bn blinding code:
3783 - automatic re-creation of the BN_BLINDING parameters after
3784 a fixed number of uses (currently 32)
3785 - add new function for parameter creation
3786 - introduce flags to control the update behaviour of the
3787 BN_BLINDING parameters
3788 - hide BN_BLINDING structure
3789 Add a second BN_BLINDING slot to the RSA structure to improve
3790 performance when a single RSA object is shared among several
3794 *) Add support for DTLS.
3795 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
3797 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
3798 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
3801 *) Remove buggy and incomplete DH cert support from
3802 ssl/ssl_rsa.c and ssl/s3_both.c
3805 *) Use SHA-1 instead of MD5 as the default digest algorithm for
3806 the apps/openssl applications.
3809 *) Compile clean with "-Wall -Wmissing-prototypes
3810 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
3811 DEBUG_SAFESTACK must also be set.
3814 *) Change ./Configure so that certain algorithms can be disabled by default.
3815 The new counterpiece to "no-xxx" is "enable-xxx".
3817 The patented RC5 and MDC2 algorithms will now be disabled unless
3818 "enable-rc5" and "enable-mdc2", respectively, are specified.
3820 (IDEA remains enabled despite being patented. This is because IDEA
3821 is frequently required for interoperability, and there is no license
3822 fee for non-commercial use. As before, "no-idea" can be used to
3823 avoid this algorithm.)
3827 *) Add processing of proxy certificates (see RFC 3820). This work was
3828 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
3829 EGEE (Enabling Grids for E-science in Europe).
3832 *) RC4 performance overhaul on modern architectures/implementations, such
3833 as Intel P4, IA-64 and AMD64.
3836 *) New utility extract-section.pl. This can be used specify an alternative
3837 section number in a pod file instead of having to treat each file as
3838 a separate case in Makefile. This can be done by adding two lines to the
3841 =for comment openssl_section:XXX
3843 The blank line is mandatory.
3847 *) New arguments -certform, -keyform and -pass for s_client and s_server
3848 to allow alternative format key and certificate files and passphrase
3852 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
3853 update associated structures and add various utility functions.
3855 Add new policy related verify parameters, include policy checking in
3856 standard verify code. Enhance 'smime' application with extra parameters
3857 to support policy checking and print out.
3860 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
3861 Nehemiah processors. These extensions support AES encryption in hardware
3862 as well as RNG (though RNG support is currently disabled).
3863 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
3865 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
3868 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
3869 [Andy Polyakov and a number of other people]
3871 *) Improved PowerPC platform support. Most notably BIGNUM assembler
3872 implementation contributed by IBM.
3873 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
3875 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
3876 exponent rather than 'unsigned long'. There is a corresponding change to
3877 the new 'rsa_keygen' element of the RSA_METHOD structure.
3878 [Jelte Jansen, Geoff Thorpe]
3880 *) Functionality for creating the initial serial number file is now
3881 moved from CA.pl to the 'ca' utility with a new option -create_serial.
3883 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
3884 number file to 1, which is bound to cause problems. To avoid
3885 the problems while respecting compatibility between different 0.9.7
3886 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
3887 CA.pl for serial number initialization. With the new release 0.9.8,
3888 we can fix the problem directly in the 'ca' utility.)
3891 *) Reduced header interdepencies by declaring more opaque objects in
3892 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
3893 give fewer recursive includes, which could break lazy source code - so
3894 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
3895 developers should define this symbol when building and using openssl to
3896 ensure they track the recommended behaviour, interfaces, [etc], but
3897 backwards-compatible behaviour prevails when this isn't defined.
3900 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
3903 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
3904 This will generate a random key of the appropriate length based on the
3905 cipher context. The EVP_CIPHER can provide its own random key generation
3906 routine to support keys of a specific form. This is used in the des and
3907 3des routines to generate a key of the correct parity. Update S/MIME
3908 code to use new functions and hence generate correct parity DES keys.
3909 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
3910 valid (weak or incorrect parity).
3913 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
3914 as looking them up. This is useful when the verified structure may contain
3915 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
3916 present unless the new PKCS7_NO_CRL flag is asserted.
3919 *) Extend ASN1 oid configuration module. It now additionally accepts the
3922 shortName = some long name, 1.2.3.4
3925 *) Reimplemented the BN_CTX implementation. There is now no more static
3926 limitation on the number of variables it can handle nor the depth of the
3927 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
3928 information can now expand as required, and rather than having a single
3929 static array of bignums, BN_CTX now uses a linked-list of such arrays
3930 allowing it to expand on demand whilst maintaining the usefulness of
3931 BN_CTX's "bundling".
3934 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
3935 to allow all RSA operations to function using a single BN_CTX.
3938 *) Preliminary support for certificate policy evaluation and checking. This
3939 is initially intended to pass the tests outlined in "Conformance Testing
3940 of Relying Party Client Certificate Path Processing Logic" v1.07.
3943 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
3944 remained unused and not that useful. A variety of other little bignum
3945 tweaks and fixes have also been made continuing on from the audit (see
3949 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
3950 associated ASN1, EVP and SSL functions and old ASN1 macros.
3953 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
3954 and this should never fail. So the return value from the use of
3955 BN_set_word() (which can fail due to needless expansion) is now deprecated;
3956 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
3959 *) BN_CTX_get() should return zero-valued bignums, providing the same
3960 initialised value as BN_new().
3961 [Geoff Thorpe, suggested by Ulf Möller]
3963 *) Support for inhibitAnyPolicy certificate extension.
3966 *) An audit of the BIGNUM code is underway, for which debugging code is
3967 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
3968 is considered valid when processing BIGNUMs, and causes execution to
3969 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
3970 further steps are taken to deliberately pollute unused data in BIGNUM
3971 structures to try and expose faulty code further on. For now, openssl will
3972 (in its default mode of operation) continue to tolerate the inconsistent
3973 forms that it has tolerated in the past, but authors and packagers should
3974 consider trying openssl and their own applications when compiled with
3975 these debugging symbols defined. It will help highlight potential bugs in
3976 their own code, and will improve the test coverage for OpenSSL itself. At
3977 some point, these tighter rules will become openssl's default to improve
3978 maintainability, though the assert()s and other overheads will remain only
3979 in debugging configurations. See bn.h for more details.
3980 [Geoff Thorpe, Nils Larsch, Ulf Möller]
3982 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
3983 that can only be obtained through BN_CTX_new() (which implicitly
3984 initialises it). The presence of this function only made it possible
3985 to overwrite an existing structure (and cause memory leaks).
3988 *) Because of the callback-based approach for implementing LHASH as a
3989 template type, lh_insert() adds opaque objects to hash-tables and
3990 lh_doall() or lh_doall_arg() are typically used with a destructor callback
3991 to clean up those corresponding objects before destroying the hash table
3992 (and losing the object pointers). So some over-zealous constifications in
3993 LHASH have been relaxed so that lh_insert() does not take (nor store) the
3994 objects as "const" and the lh_doall[_arg] callback wrappers are not
3995 prototyped to have "const" restrictions on the object pointers they are
3996 given (and so aren't required to cast them away any more).
3999 *) The tmdiff.h API was so ugly and minimal that our own timing utility
4000 (speed) prefers to use its own implementation. The two implementations
4001 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
4002 its object type properly exposed (MS_TM) instead of casting to/from "char
4003 *". This may still change yet if someone realises MS_TM and "ms_time_***"
4004 aren't necessarily the greatest nomenclatures - but this is what was used
4005 internally to the implementation so I've used that for now.
4008 *) Ensure that deprecated functions do not get compiled when
4009 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
4010 the self-tests were still using deprecated key-generation functions so
4011 these have been updated also.
4014 *) Reorganise PKCS#7 code to separate the digest location functionality
4015 into PKCS7_find_digest(), digest addition into PKCS7_bio_add_digest().
4016 New function PKCS7_set_digest() to set the digest type for PKCS#7
4017 digestedData type. Add additional code to correctly generate the
4018 digestedData type and add support for this type in PKCS7 initialization
4022 *) New function PKCS7_set0_type_other() this initializes a PKCS7
4023 structure of type "other".
4026 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
4027 sure the loop does correctly stop and breaking ("division by zero")
4028 modulus operations are not performed. The (pre-generated) prime
4029 table crypto/bn/bn_prime.h was already correct, but it could not be
4030 re-generated on some platforms because of the "division by zero"
4031 situation in the script.
4032 [Ralf S. Engelschall]
4034 *) Update support for ECC-based TLS ciphersuites according to
4035 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
4036 SHA-1 now is only used for "small" curves (where the
4037 representation of a field element takes up to 24 bytes); for
4038 larger curves, the field element resulting from ECDH is directly
4039 used as premaster secret.
4040 [Douglas Stebila (Sun Microsystems Laboratories)]
4042 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
4043 curve secp160r1 to the tests.
4044 [Douglas Stebila (Sun Microsystems Laboratories)]
4046 *) Add the possibility to load symbols globally with DSO.
4047 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
4049 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
4050 control of the error stack.
4053 *) Add support for STORE in ENGINE.
4056 *) Add the STORE type. The intention is to provide a common interface
4057 to certificate and key stores, be they simple file-based stores, or
4058 HSM-type store, or LDAP stores, or...
4059 NOTE: The code is currently UNTESTED and isn't really used anywhere.
4062 *) Add a generic structure called OPENSSL_ITEM. This can be used to
4063 pass a list of arguments to any function as well as provide a way
4064 for a function to pass data back to the caller.
4067 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
4068 works like BUF_strdup() but can be used to duplicate a portion of
4069 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
4073 *) Add the function sk_find_ex() which works like sk_find(), but will
4074 return an index to an element even if an exact match couldn't be
4075 found. The index is guaranteed to point at the element where the
4076 searched-for key would be inserted to preserve sorting order.
4079 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
4080 takes an extra flags argument for optional functionality. Currently,
4081 the following flags are defined:
4083 OBJ_BSEARCH_VALUE_ON_NOMATCH
4084 This one gets OBJ_bsearch_ex() to return a pointer to the first
4085 element where the comparing function returns a negative or zero
4088 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
4089 This one gets OBJ_bsearch_ex() to return a pointer to the first
4090 element where the comparing function returns zero. This is useful
4091 if there are more than one element where the comparing function
4095 *) Make it possible to create self-signed certificates with 'openssl ca'
4096 in such a way that the self-signed certificate becomes part of the
4097 CA database and uses the same mechanisms for serial number generation
4098 as all other certificate signing. The new flag '-selfsign' enables
4099 this functionality. Adapt CA.sh and CA.pl.in.
4102 *) Add functionality to check the public key of a certificate request
4103 against a given private. This is useful to check that a certificate
4104 request can be signed by that key (self-signing).
4107 *) Make it possible to have multiple active certificates with the same
4108 subject in the CA index file. This is done only if the keyword
4109 'unique_subject' is set to 'no' in the main CA section (default
4110 if 'CA_default') of the configuration file. The value is saved
4111 with the database itself in a separate index attribute file,
4112 named like the index file with '.attr' appended to the name.
4115 *) Generate muti valued AVAs using '+' notation in config files for
4119 *) Support for nameConstraints certificate extension.
4122 *) Support for policyConstraints certificate extension.
4125 *) Support for policyMappings certificate extension.
4128 *) Make sure the default DSA_METHOD implementation only uses its
4129 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
4130 and change its own handlers to be NULL so as to remove unnecessary
4131 indirection. This lets alternative implementations fallback to the
4132 default implementation more easily.
4135 *) Support for directoryName in GeneralName related extensions
4139 *) Make it possible to link applications using Makefile.shared.
4140 Make that possible even when linking against static libraries!
4143 *) Support for single pass processing for S/MIME signing. This now
4144 means that S/MIME signing can be done from a pipe, in addition
4145 cleartext signing (multipart/signed type) is effectively streaming
4146 and the signed data does not need to be all held in memory.
4148 This is done with a new flag PKCS7_STREAM. When this flag is set
4149 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
4150 is done after the data is output (and digests calculated) in
4151 SMIME_write_PKCS7().
4154 *) Add full support for -rpath/-R, both in shared libraries and
4155 applications, at least on the platforms where it's known how
4159 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
4160 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
4161 will now compute a table of multiples of the generator that
4162 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
4163 faster (notably in the case of a single point multiplication,
4164 scalar * generator).
4165 [Nils Larsch, Bodo Moeller]
4167 *) IPv6 support for certificate extensions. The various extensions
4168 which use the IP:a.b.c.d can now take IPv6 addresses using the
4169 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
4173 *) Added an ENGINE that implements RSA by performing private key
4174 exponentiations with the GMP library. The conversions to and from
4175 GMP's mpz_t format aren't optimised nor are any montgomery forms
4176 cached, and on x86 it appears OpenSSL's own performance has caught up.
4177 However there are likely to be other architectures where GMP could
4178 provide a boost. This ENGINE is not built in by default, but it can be
4179 specified at Configure time and should be accompanied by the necessary
4180 linker additions, eg;
4181 ./config -DOPENSSL_USE_GMP -lgmp
4184 *) "openssl engine" will not display ENGINE/DSO load failure errors when
4185 testing availability of engines with "-t" - the old behaviour is
4186 produced by increasing the feature's verbosity with "-tt".
4189 *) ECDSA routines: under certain error conditions uninitialized BN objects
4190 could be freed. Solution: make sure initialization is performed early
4191 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
4195 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
4196 and DH_METHOD (eg. by ENGINE implementations) to override the normal
4197 software implementations. For DSA and DH, parameter generation can
4198 also be overriden by providing the appropriate method callbacks.
4201 *) Change the "progress" mechanism used in key-generation and
4202 primality testing to functions that take a new BN_GENCB pointer in
4203 place of callback/argument pairs. The new API functions have "_ex"
4204 postfixes and the older functions are reimplemented as wrappers for
4205 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
4206 declarations of the old functions to help (graceful) attempts to
4207 migrate to the new functions. Also, the new key-generation API
4208 functions operate on a caller-supplied key-structure and return
4209 success/failure rather than returning a key or NULL - this is to
4210 help make "keygen" another member function of RSA_METHOD etc.
4212 Example for using the new callback interface:
4214 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
4218 BN_GENCB_set(&my_cb, my_callback, my_arg);
4220 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
4221 /* For the meaning of a, b in calls to my_callback(), see the
4222 * documentation of the function that calls the callback.
4223 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
4224 * my_callback should return 1 if it wants BN_is_prime_ex()
4225 * to continue, or 0 to stop.
4230 *) Change the ZLIB compression method to be stateful, and make it
4231 available to TLS with the number defined in
4232 draft-ietf-tls-compression-04.txt.
4235 *) Add the ASN.1 structures and functions for CertificatePair, which
4236 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
4238 CertificatePair ::= SEQUENCE {
4239 forward [0] Certificate OPTIONAL,
4240 reverse [1] Certificate OPTIONAL,
4241 -- at least one of the pair shall be present -- }
4243 Also implement the PEM functions to read and write certificate
4244 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
4246 This needed to be defined, mostly for the sake of the LDAP
4247 attribute crossCertificatePair, but may prove useful elsewhere as
4251 *) Make it possible to inhibit symlinking of shared libraries in
4252 Makefile.shared, for Cygwin's sake.
4255 *) Extend the BIGNUM API by creating a function
4256 void BN_set_negative(BIGNUM *a, int neg);
4257 and a macro that behave like
4258 int BN_is_negative(const BIGNUM *a);
4260 to avoid the need to access 'a->neg' directly in applications.
4263 *) Implement fast modular reduction for pseudo-Mersenne primes
4264 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
4265 EC_GROUP_new_curve_GFp() will now automatically use this
4267 [Nils Larsch <nla@trustcenter.de>]
4269 *) Add new lock type (CRYPTO_LOCK_BN).
4272 *) Change the ENGINE framework to automatically load engines
4273 dynamically from specific directories unless they could be
4274 found to already be built in or loaded. Move all the
4275 current engines except for the cryptodev one to a new
4277 The engines in engines/ are built as shared libraries if
4278 the "shared" options was given to ./Configure or ./config.
4279 Otherwise, they are inserted in libcrypto.a.
4280 /usr/local/ssl/engines is the default directory for dynamic
4281 engines, but that can be overriden at configure time through
4282 the usual use of --prefix and/or --openssldir, and at run
4283 time with the environment variable OPENSSL_ENGINES.
4284 [Geoff Thorpe and Richard Levitte]
4286 *) Add Makefile.shared, a helper makefile to build shared
4287 libraries. Adapt Makefile.org.
4290 *) Add version info to Win32 DLLs.
4291 [Peter 'Luna' Runestig" <peter@runestig.com>]
4293 *) Add new 'medium level' PKCS#12 API. Certificates and keys
4294 can be added using this API to created arbitrary PKCS#12
4295 files while avoiding the low level API.
4297 New options to PKCS12_create(), key or cert can be NULL and
4298 will then be omitted from the output file. The encryption
4299 algorithm NIDs can be set to -1 for no encryption, the mac
4300 iteration count can be set to 0 to omit the mac.
4302 Enhance pkcs12 utility by making the -nokeys and -nocerts
4303 options work when creating a PKCS#12 file. New option -nomac
4304 to omit the mac, NONE can be set for an encryption algorithm.
4305 New code is modified to use the enhanced PKCS12_create()
4306 instead of the low level API.
4309 *) Extend ASN1 encoder to support indefinite length constructed
4310 encoding. This can output sequences tags and octet strings in
4311 this form. Modify pk7_asn1.c to support indefinite length
4312 encoding. This is experimental and needs additional code to
4313 be useful, such as an ASN1 bio and some enhanced streaming
4316 Extend template encode functionality so that tagging is passed
4317 down to the template encoder.
4320 *) Let 'openssl req' fail if an argument to '-newkey' is not
4321 recognized instead of using RSA as a default.
4324 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
4325 As these are not official, they are not included in "ALL";
4326 the "ECCdraft" ciphersuite group alias can be used to select them.
4327 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
4329 *) Add ECDH engine support.
4330 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
4332 *) Add ECDH in new directory crypto/ecdh/.
4333 [Douglas Stebila (Sun Microsystems Laboratories)]
4335 *) Let BN_rand_range() abort with an error after 100 iterations
4336 without success (which indicates a broken PRNG).
4339 *) Change BN_mod_sqrt() so that it verifies that the input value
4340 is really the square of the return value. (Previously,
4341 BN_mod_sqrt would show GIGO behaviour.)
4344 *) Add named elliptic curves over binary fields from X9.62, SECG,
4345 and WAP/WTLS; add OIDs that were still missing.
4347 [Sheueling Chang Shantz and Douglas Stebila
4348 (Sun Microsystems Laboratories)]
4350 *) Extend the EC library for elliptic curves over binary fields
4351 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
4354 EC_GF2m_simple_method
4358 EC_GROUP_new_curve_GF2m
4359 EC_GROUP_set_curve_GF2m
4360 EC_GROUP_get_curve_GF2m
4361 EC_POINT_set_affine_coordinates_GF2m
4362 EC_POINT_get_affine_coordinates_GF2m
4363 EC_POINT_set_compressed_coordinates_GF2m
4365 Point compression for binary fields is disabled by default for
4366 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
4369 As binary polynomials are represented as BIGNUMs, various members
4370 of the EC_GROUP and EC_POINT data structures can be shared
4371 between the implementations for prime fields and binary fields;
4372 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
4373 are essentially identical to their ..._GFp counterparts.
4374 (For simplicity, the '..._GFp' prefix has been dropped from
4375 various internal method names.)
4377 An internal 'field_div' method (similar to 'field_mul' and
4378 'field_sqr') has been added; this is used only for binary fields.
4380 [Sheueling Chang Shantz and Douglas Stebila
4381 (Sun Microsystems Laboratories)]
4383 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
4384 through methods ('mul', 'precompute_mult').
4386 The generic implementations (now internally called 'ec_wNAF_mul'
4387 and 'ec_wNAF_precomputed_mult') remain the default if these
4388 methods are undefined.
4390 [Sheueling Chang Shantz and Douglas Stebila
4391 (Sun Microsystems Laboratories)]
4393 *) New function EC_GROUP_get_degree, which is defined through
4394 EC_METHOD. For curves over prime fields, this returns the bit
4395 length of the modulus.
4397 [Sheueling Chang Shantz and Douglas Stebila
4398 (Sun Microsystems Laboratories)]
4400 *) New functions EC_GROUP_dup, EC_POINT_dup.
4401 (These simply call ..._new and ..._copy).
4403 [Sheueling Chang Shantz and Douglas Stebila
4404 (Sun Microsystems Laboratories)]