5 Changes between 1.0.1 and 1.1.0 [xx XXX xxxx]
7 *) Print out deprecated issuer and subject unique ID fields in
12 [Emilia Kasper, Adam Langley, Ben Laurie (Google)]
14 *) Support for automatic EC temporary key parameter selection. If enabled
15 the most preferred EC parameters are automatically used instead of
16 hardcoded fixed parameters. Now a server just has to call:
17 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
18 support ECDH and use the most appropriate parameters.
21 *) Enhance and tidy EC curve and point format TLS extension code. Use
22 static structures instead of allocation if default values are used.
23 New ctrls to set curves we wish to support and to retrieve shared curves.
24 Print out shared curves in s_server. New options to s_server and s_client
25 to set list of supported curves.
28 *) New ctrls to retrieve supported signature algorithms and
29 supported curve values as an array of NIDs. Extend openssl utility
30 to print out received values.
33 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
34 between NIDs and the more common NIST names such as "P-256". Enhance
35 ecparam utility and ECC method to recognise the NIST names for curves.
38 *) Enhance SSL/TLS certificate chain handling to support different
39 chains for each certificate instead of one chain in the parent SSL_CTX.
42 *) Support for fixed DH ciphersuite client authentication: where both
43 server and client use DH certificates with common parameters.
46 *) Support for fixed DH ciphersuites: those requiring DH server
50 *) Transparently support X9.42 DH parameters when calling
51 PEM_read_bio_DHparameters. This means existing applications can handle
52 the new parameter format automatically.
55 *) Initial experimental support for X9.42 DH parameter format: mainly
56 to support use of 'q' parameter for RFC5114 parameters.
59 *) Add DH parameters from RFC5114 including test data to dhtest.
62 *) Update fips_test_suite to support multiple command line options. New
63 test to induce all self test errors in sequence and check expected
67 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
68 sign or verify all in one operation.
71 *) Add fips_algvs: a multicall fips utility incorporaing all the algorithm
72 test programs and fips_test_suite. Includes functionality to parse
73 the minimal script output of fipsalgest.pl directly.
76 *) Add authorisation parameter to FIPS_module_mode_set().
79 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
82 *) Use separate DRBG fields for internal and external flags. New function
83 FIPS_drbg_health_check() to perform on demand health checking. Add
84 generation tests to fips_test_suite with reduced health check interval to
85 demonstrate periodic health checking. Add "nodh" option to
86 fips_test_suite to skip very slow DH test.
89 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
93 *) More extensive health check for DRBG checking many more failure modes.
94 New function FIPS_selftest_drbg_all() to handle every possible DRBG
95 combination: call this in fips_test_suite.
98 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
99 and POST to handle Dual EC cases.
102 *) Add support for canonical generation of DSA parameter 'g'. See
105 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
106 POST to handle HMAC cases.
109 *) Add functions FIPS_module_version() and FIPS_module_version_text()
110 to return numberical and string versions of the FIPS module number.
113 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
114 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implmeneted
115 outside the validated module in the FIPS capable OpenSSL.
118 *) Minor change to DRBG entropy callback semantics. In some cases
119 there is no mutiple of the block length between min_len and
120 max_len. Allow the callback to return more than max_len bytes
121 of entropy but discard any extra: it is the callback's responsibility
122 to ensure that the extra data discarded does not impact the
123 requested amount of entropy.
126 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
127 information in FIPS186-3, SP800-57 and SP800-131A.
130 *) CCM support via EVP. Interface is very similar to GCM case except we
131 must supply all data in one chunk (i.e. no update, final) and the
132 message length must be supplied if AAD is used. Add algorithm test
136 *) Initial version of POST overhaul. Add POST callback to allow the status
137 of POST to be monitored and/or failures induced. Modify fips_test_suite
138 to use callback. Always run all selftests even if one fails.
141 *) XTS support including algorithm test driver in the fips_gcmtest program.
142 Note: this does increase the maximum key length from 32 to 64 bytes but
143 there should be no binary compatibility issues as existing applications
144 will never use XTS mode.
147 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
148 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
149 performs algorithm blocking for unapproved PRNG types. Also do not
150 set PRNG type in FIPS_mode_set(): leave this to the application.
151 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
152 the standard OpenSSL PRNG: set additional data to a date time vector.
155 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
156 This shouldn't present any incompatibility problems because applications
157 shouldn't be using these directly and any that are will need to rethink
158 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
161 *) Extensive self tests and health checking required by SP800-90 DRBG.
162 Remove strength parameter from FIPS_drbg_instantiate and always
163 instantiate at maximum supported strength.
166 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
169 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
172 *) New function DH_compute_key_padded() to compute a DH key and pad with
173 leading zeroes if needed: this complies with SP800-56A et al.
176 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
177 anything, incomplete, subject to change and largely untested at present.
180 *) Modify fipscanisteronly build option to only build the necessary object
181 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
184 *) Add experimental option FIPSSYMS to give all symbols in
185 fipscanister.o and FIPS or fips prefix. This will avoid
186 conflicts with future versions of OpenSSL. Add perl script
187 util/fipsas.pl to preprocess assembly language source files
188 and rename any affected symbols.
191 *) Add selftest checks and algorithm block of non-fips algorithms in
192 FIPS mode. Remove DES2 from selftests.
195 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
196 return internal method without any ENGINE dependencies. Add new
197 tiny fips sign and verify functions.
200 *) New build option no-ec2m to disable characteristic 2 code.
203 *) New build option "fipscanisteronly". This only builds fipscanister.o
204 and (currently) associated fips utilities. Uses the file Makefile.fips
205 instead of Makefile.org as the prototype.
208 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
209 Update fips_gcmtest to use IV generator.
212 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
213 setting output buffer to NULL. The *Final function must be
214 called although it will not retrieve any additional data. The tag
215 can be set or retrieved with a ctrl. The IV length is by default 12
216 bytes (96 bits) but can be set to an alternative value. If the IV
217 length exceeds the maximum IV length (currently 16 bytes) it cannot be
221 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
222 underlying do_cipher function handles all cipher semantics itself
223 including padding and finalisation. This is useful if (for example)
224 an ENGINE cipher handles block padding itself. The behaviour of
225 do_cipher is subtly changed if this flag is set: the return value
226 is the number of characters written to the output buffer (zero is
227 no longer an error code) or a negative error code. Also if the
228 input buffer is NULL and length 0 finalisation should be performed.
231 *) If a candidate issuer certificate is already part of the constructed
232 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
235 *) Improve forward-security support: add functions
237 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
238 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
240 for use by SSL/TLS servers; the callback function will be called whenever a
241 new session is created, and gets to decide whether the session may be
242 cached to make it resumable (return 0) or not (return 1). (As by the
243 SSL/TLS protocol specifications, the session_id sent by the server will be
244 empty to indicate that the session is not resumable; also, the server will
245 not generate RFC 4507 (RFC 5077) session tickets.)
247 A simple reasonable callback implementation is to return is_forward_secure.
248 This parameter will be set to 1 or 0 depending on the ciphersuite selected
249 by the SSL/TLS server library, indicating whether it can provide forward
251 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
253 *) New function OPENSSL_gmtime_diff to find the difference in days
254 and seconds between two tm structures. This will be used to provide
255 additional functionality for ASN1_TIME.
258 *) Add -trusted_first option which attempts to find certificates in the
259 trusted store even if an untrusted chain is also supplied.
262 *) Initial experimental support for explicitly trusted non-root CAs.
263 OpenSSL still tries to build a complete chain to a root but if an
264 intermediate CA has a trust setting included that is used. The first
265 setting is used: whether to trust or reject.
268 *) New -verify_name option in command line utilities to set verification
272 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
273 Add CMAC pkey methods.
276 *) Experimental regnegotiation in s_server -www mode. If the client
277 browses /reneg connection is renegotiated. If /renegcert it is
278 renegotiated requesting a certificate.
281 *) Add an "external" session cache for debugging purposes to s_server. This
282 should help trace issues which normally are only apparent in deployed
283 multi-process servers.
286 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
287 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
288 BIO_set_cipher() and some obscure PEM functions were changed so they
289 can now return an error. The RAND changes required a change to the
290 RAND_METHOD structure.
293 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
294 a gcc attribute to warn if the result of a function is ignored. This
295 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
296 whose return value is often ignored.
299 Changes between 1.0.1c and 1.0.1d [xx XXX xxxx]
301 *) Fix possible deadlock when decoding public keys.
304 *) Don't use TLS 1.0 record version number in initial client hello
308 Changes between 1.0.1b and 1.0.1c [10 May 2012]
310 *) Sanity check record length before skipping explicit IV in TLS
311 1.2, 1.1 and DTLS to avoid DoS attack.
313 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
314 fuzzing as a service testing platform.
318 *) Initialise tkeylen properly when encrypting CMS messages.
319 Thanks to Solar Designer of Openwall for reporting this issue.
322 *) In FIPS mode don't try to use composite ciphers as they are not
326 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
328 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
329 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
330 mean any application compiled against OpenSSL 1.0.0 headers setting
331 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
332 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
333 0x10000000L Any application which was previously compiled against
334 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
335 will need to be recompiled as a result. Letting be results in
336 inability to disable specifically TLS 1.1 and in client context,
337 in unlike event, limit maximum offered version to TLS 1.0 [see below].
340 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
341 disable just protocol X, but all protocols above X *if* there are
342 protocols *below* X still enabled. In more practical terms it means
343 that if application wants to disable TLS1.0 in favor of TLS1.1 and
344 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
345 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
349 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
351 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
352 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
353 in CRYPTO_realloc_clean.
355 Thanks to Tavis Ormandy, Google Security Team, for discovering this
356 issue and to Adam Langley <agl@chromium.org> for fixing it.
358 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
360 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
363 *) Workarounds for some broken servers that "hang" if a client hello
364 record length exceeds 255 bytes:
366 1. Do not use record version number > TLS 1.0 in initial client
367 hello: some (but not all) hanging servers will now work.
368 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
369 the number of ciphers sent in the client hello. This should be
370 set to an even number, such as 50, for example by passing:
371 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
372 Most broken servers should now work.
373 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
374 TLS 1.2 client support entirely.
377 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
380 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
382 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
383 STRING form instead of a DigestInfo.
386 *) The format used for MDC2 RSA signatures is inconsistent between EVP
387 and the RSA_sign/RSA_verify functions. This was made more apparent when
388 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
389 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
390 the correct format in RSA_verify so both forms transparently work.
393 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
394 STRING form instead of a DigestInfo.
397 *) Some servers which support TLS 1.0 can choke if we initially indicate
398 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
399 encrypted premaster secret. As a workaround use the maximum pemitted
400 client version in client hello, this should keep such servers happy
401 and still work with previous versions of OpenSSL.
404 *) Add support for TLS/DTLS heartbeats.
405 [Robin Seggelmann <seggelmann@fh-muenster.de>]
407 *) Add support for SCTP.
408 [Robin Seggelmann <seggelmann@fh-muenster.de>]
410 *) Improved PRNG seeding for VOS.
411 [Paul Green <Paul.Green@stratus.com>]
413 *) Extensive assembler packs updates, most notably:
415 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
416 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
417 - x86_64: bit-sliced AES implementation;
418 - ARM: NEON support, contemporary platforms optimizations;
419 - s390x: z196 support;
420 - *: GHASH and GF(2^m) multiplication implementations;
424 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
425 (removal of unnecessary code)
426 [Peter Sylvester <peter.sylvester@edelweb.fr>]
428 *) Add TLS key material exporter from RFC 5705.
431 *) Add DTLS-SRTP negotiation from RFC 5764.
434 *) Add Next Protocol Negotiation,
435 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
436 disabled with a no-npn flag to config or Configure. Code donated
438 [Adam Langley <agl@google.com> and Ben Laurie]
440 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
441 NIST-P256, NIST-P521, with constant-time single point multiplication on
442 typical inputs. Compiler support for the nonstandard type __uint128_t is
443 required to use this (present in gcc 4.4 and later, for 64-bit builds).
444 Code made available under Apache License version 2.0.
446 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
447 line to include this in your build of OpenSSL, and run "make depend" (or
448 "make update"). This enables the following EC_METHODs:
450 EC_GFp_nistp224_method()
451 EC_GFp_nistp256_method()
452 EC_GFp_nistp521_method()
454 EC_GROUP_new_by_curve_name() will automatically use these (while
455 EC_GROUP_new_curve_GFp() currently prefers the more flexible
457 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
459 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
460 all platforms. Move ssize_t definition from e_os.h to the public
461 header file e_os2.h as it now appears in public header file cms.h
464 *) New -sigopt option to the ca, req and x509 utilities. Additional
465 signature parameters can be passed using this option and in
469 *) Add RSA PSS signing function. This will generate and set the
470 appropriate AlgorithmIdentifiers for PSS based on those in the
471 corresponding EVP_MD_CTX structure. No application support yet.
474 *) Support for companion algorithm specific ASN1 signing routines.
475 New function ASN1_item_sign_ctx() signs a pre-initialised
476 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
477 the appropriate parameters.
480 *) Add new algorithm specific ASN1 verification initialisation function
481 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
482 handling will be the same no matter what EVP_PKEY_METHOD is used.
483 Add a PSS handler to support verification of PSS signatures: checked
484 against a number of sample certificates.
487 *) Add signature printing for PSS. Add PSS OIDs.
488 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
490 *) Add algorithm specific signature printing. An individual ASN1 method
491 can now print out signatures instead of the standard hex dump.
493 More complex signatures (e.g. PSS) can print out more meaningful
494 information. Include DSA version that prints out the signature
498 *) Password based recipient info support for CMS library: implementing
502 *) Split password based encryption into PBES2 and PBKDF2 functions. This
503 neatly separates the code into cipher and PBE sections and is required
504 for some algorithms that split PBES2 into separate pieces (such as
508 *) Session-handling fixes:
509 - Fix handling of connections that are resuming with a session ID,
510 but also support Session Tickets.
511 - Fix a bug that suppressed issuing of a new ticket if the client
512 presented a ticket with an expired session.
513 - Try to set the ticket lifetime hint to something reasonable.
514 - Make tickets shorter by excluding irrelevant information.
515 - On the client side, don't ignore renewed tickets.
516 [Adam Langley, Bodo Moeller (Google)]
518 *) Fix PSK session representation.
521 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
523 This work was sponsored by Intel.
526 *) Add GCM support to TLS library. Some custom code is needed to split
527 the IV between the fixed (from PRF) and explicit (from TLS record)
528 portions. This adds all GCM ciphersuites supported by RFC5288 and
529 RFC5289. Generalise some AES* cipherstrings to inlclude GCM and
530 add a special AESGCM string for GCM only.
533 *) Expand range of ctrls for AES GCM. Permit setting invocation
534 field on decrypt and retrieval of invocation field only on encrypt.
537 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
538 As required by RFC5289 these ciphersuites cannot be used if for
539 versions of TLS earlier than 1.2.
542 *) For FIPS capable OpenSSL interpret a NULL default public key method
543 as unset and return the appopriate default but do *not* set the default.
544 This means we can return the appopriate method in applications that
545 swicth between FIPS and non-FIPS modes.
548 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
549 ENGINE is used then we cannot handle that in the FIPS module so we
550 keep original code iff non-FIPS operations are allowed.
553 *) Add -attime option to openssl utilities.
554 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
556 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
559 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
560 FIPS EC methods unconditionally for now.
563 *) New build option no-ec2m to disable characteristic 2 code.
566 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
567 all cases can be covered as some introduce binary incompatibilities.
570 *) Redirect RSA operations to FIPS module including keygen,
571 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
574 *) Add similar low level API blocking to ciphers.
577 *) Low level digest APIs are not approved in FIPS mode: any attempt
578 to use these will cause a fatal error. Applications that *really* want
579 to use them can use the private_* version instead.
582 *) Redirect cipher operations to FIPS module for FIPS builds.
585 *) Redirect digest operations to FIPS module for FIPS builds.
588 *) Update build system to add "fips" flag which will link in fipscanister.o
589 for static and shared library builds embedding a signature if needed.
592 *) Output TLS supported curves in preference order instead of numerical
593 order. This is currently hardcoded for the highest order curves first.
594 This should be configurable so applications can judge speed vs strength.
597 *) Add TLS v1.2 server support for client authentication.
600 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
604 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
605 FIPS modules versions.
608 *) Add TLS v1.2 client side support for client authentication. Keep cache
609 of handshake records longer as we don't know the hash algorithm to use
610 until after the certificate request message is received.
613 *) Initial TLS v1.2 client support. Add a default signature algorithms
614 extension including all the algorithms we support. Parse new signature
615 format in client key exchange. Relax some ECC signing restrictions for
616 TLS v1.2 as indicated in RFC5246.
619 *) Add server support for TLS v1.2 signature algorithms extension. Switch
620 to new signature format when needed using client digest preference.
621 All server ciphersuites should now work correctly in TLS v1.2. No client
622 support yet and no support for client certificates.
625 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
626 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
627 ciphersuites. At present only RSA key exchange ciphersuites work with
628 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
629 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
630 and version checking.
633 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
634 with this defined it will not be affected by any changes to ssl internal
635 structures. Add several utility functions to allow openssl application
636 to work with OPENSSL_NO_SSL_INTERN defined.
640 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
642 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
645 *) Permit abbreviated handshakes when renegotiating using the function
646 SSL_renegotiate_abbreviated().
647 [Robin Seggelmann <seggelmann@fh-muenster.de>]
649 *) Add call to ENGINE_register_all_complete() to
650 ENGINE_load_builtin_engines(), so some implementations get used
651 automatically instead of needing explicit application support.
654 *) Add support for TLS key exporter as described in RFC5705.
655 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
657 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
658 a few changes are required:
660 Add SSL_OP_NO_TLSv1_1 flag.
662 Update version checking logic to handle version 1.1.
663 Add explicit IV handling (ported from DTLS code).
664 Add command line options to s_client/s_server.
667 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
669 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
670 in CMS and PKCS7 code. When RSA decryption fails use a random key for
671 content decryption and always return the same error. Note: this attack
672 needs on average 2^20 messages so it only affects automated senders. The
673 old behaviour can be reenabled in the CMS code by setting the
674 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
675 an MMA defence is not necessary.
676 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
677 this issue. (CVE-2012-0884)
680 *) Fix CVE-2011-4619: make sure we really are receiving a
681 client hello before rejecting multiple SGC restarts. Thanks to
682 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
685 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
687 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
688 Thanks to Antonio Martin, Enterprise Secure Access Research and
689 Development, Cisco Systems, Inc. for discovering this bug and
690 preparing a fix. (CVE-2012-0050)
693 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
695 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
696 of the Vaudenay padding oracle attack on CBC mode encryption
697 which enables an efficient plaintext recovery attack against
698 the OpenSSL implementation of DTLS. Their attack exploits timing
699 differences arising during decryption processing. A research
700 paper describing this attack can be found at:
701 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
702 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
703 Security Group at Royal Holloway, University of London
704 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
705 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
706 for preparing the fix. (CVE-2011-4108)
707 [Robin Seggelmann, Michael Tuexen]
709 *) Clear bytes used for block padding of SSL 3.0 records.
711 [Adam Langley (Google)]
713 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
714 Kadianakis <desnacked@gmail.com> for discovering this issue and
715 Adam Langley for preparing the fix. (CVE-2011-4619)
716 [Adam Langley (Google)]
718 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
719 [Andrey Kulikov <amdeich@gmail.com>]
721 *) Prevent malformed RFC3779 data triggering an assertion failure.
722 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
723 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
724 [Rob Austein <sra@hactrn.net>]
726 *) Improved PRNG seeding for VOS.
727 [Paul Green <Paul.Green@stratus.com>]
729 *) Fix ssl_ciph.c set-up race.
730 [Adam Langley (Google)]
732 *) Fix spurious failures in ecdsatest.c.
733 [Emilia Käsper (Google)]
735 *) Fix the BIO_f_buffer() implementation (which was mixing different
736 interpretations of the '..._len' fields).
737 [Adam Langley (Google)]
739 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
740 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
741 threads won't reuse the same blinding coefficients.
743 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
744 lock to call BN_BLINDING_invert_ex, and avoids one use of
745 BN_BLINDING_update for each BN_BLINDING structure (previously,
746 the last update always remained unused).
747 [Emilia Käsper (Google)]
749 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
750 [Bob Buckholz (Google)]
752 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
754 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
755 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
756 [Kaspar Brand <ossl@velox.ch>]
758 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
759 for multi-threaded use of ECDH. (CVE-2011-3210)
760 [Adam Langley (Google)]
762 *) Fix x509_name_ex_d2i memory leak on bad inputs.
765 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
766 signature public key algorithm by using OID xref utilities instead.
767 Before this you could only use some ECC ciphersuites with SHA1 only.
770 *) Add protection against ECDSA timing attacks as mentioned in the paper
771 by Billy Bob Brumley and Nicola Tuveri, see:
773 http://eprint.iacr.org/2011/232.pdf
775 [Billy Bob Brumley and Nicola Tuveri]
777 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
779 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
780 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
782 *) Fix bug in string printing code: if *any* escaping is enabled we must
783 escape the escape character (backslash) or the resulting string is
787 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
789 *) Disable code workaround for ancient and obsolete Netscape browsers
790 and servers: an attacker can use it in a ciphersuite downgrade attack.
791 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
794 *) Fixed J-PAKE implementation error, originally discovered by
795 Sebastien Martini, further info and confirmation from Stefan
796 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
799 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
801 *) Fix extension code to avoid race conditions which can result in a buffer
802 overrun vulnerability: resumed sessions must not be modified as they can
803 be shared by multiple threads. CVE-2010-3864
806 *) Fix WIN32 build system to correctly link an ENGINE directory into
810 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
812 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
814 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
816 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
818 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
819 context. The operation can be customised via the ctrl mechanism in
820 case ENGINEs want to include additional functionality.
823 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
826 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
827 output hashes compatible with older versions of OpenSSL.
828 [Willy Weisz <weisz@vcpc.univie.ac.at>]
830 *) Fix compression algorithm handling: if resuming a session use the
831 compression algorithm of the resumed session instead of determining
832 it from client hello again. Don't allow server to change algorithm.
835 *) Add load_crls() function to apps tidying load_certs() too. Add option
836 to verify utility to allow additional CRLs to be included.
839 *) Update OCSP request code to permit adding custom headers to the request:
840 some responders need this.
843 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
845 [Julia Lawall <julia@diku.dk>]
847 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
848 needlessly dereferenced structures, used obsolete functions and
849 didn't handle all updated verify codes correctly.
852 *) Disable MD2 in the default configuration.
855 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
856 indicate the initial BIO being pushed or popped. This makes it possible
857 to determine whether the BIO is the one explicitly called or as a result
858 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
859 it handles reference counts correctly and doesn't zero out the I/O bio
860 when it is not being explicitly popped. WARNING: applications which
861 included workarounds for the old buggy behaviour will need to be modified
862 or they could free up already freed BIOs.
865 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
866 renaming to all platforms (within the 0.9.8 branch, this was
867 done conditionally on Netware platforms to avoid a name clash).
868 [Guenter <lists@gknw.net>]
870 *) Add ECDHE and PSK support to DTLS.
871 [Michael Tuexen <tuexen@fh-muenster.de>]
873 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
877 *) Add "missing" function EVP_MD_flags() (without this the only way to
878 retrieve a digest flags is by accessing the structure directly. Update
879 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
880 or cipher is registered as in the "from" argument. Print out all
881 registered digests in the dgst usage message instead of manually
882 attempting to work them out.
885 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
886 this allows the use of compression and extensions. Change default cipher
887 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
888 by default unless an application cipher string requests it.
891 *) Alter match criteria in PKCS12_parse(). It used to try to use local
892 key ids to find matching certificates and keys but some PKCS#12 files
893 don't follow the (somewhat unwritten) rules and this strategy fails.
894 Now just gather all certificates together and the first private key
895 then look for the first certificate that matches the key.
898 *) Support use of registered digest and cipher names for dgst and cipher
899 commands instead of having to add each one as a special case. So now
906 openssl dgst -sha256 foo
908 and this works for ENGINE based algorithms too.
912 *) Update Gost ENGINE to support parameter files.
913 [Victor B. Wagner <vitus@cryptocom.ru>]
915 *) Support GeneralizedTime in ca utility.
916 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
918 *) Enhance the hash format used for certificate directory links. The new
919 form uses the canonical encoding (meaning equivalent names will work
920 even if they aren't identical) and uses SHA1 instead of MD5. This form
921 is incompatible with the older format and as a result c_rehash should
922 be used to rebuild symbolic links.
925 *) Make PKCS#8 the default write format for private keys, replacing the
926 traditional format. This form is standardised, more secure and doesn't
927 include an implicit MD5 dependency.
930 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
931 committed to OpenSSL should pass this lot as a minimum.
934 *) Add session ticket override functionality for use by EAP-FAST.
935 [Jouni Malinen <j@w1.fi>]
937 *) Modify HMAC functions to return a value. Since these can be implemented
938 in an ENGINE errors can occur.
941 *) Type-checked OBJ_bsearch_ex.
944 *) Type-checked OBJ_bsearch. Also some constification necessitated
945 by type-checking. Still to come: TXT_DB, bsearch(?),
946 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
950 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
951 seconds to a tm structure directly, instead of going through OS
952 specific date routines. This avoids any issues with OS routines such
953 as the year 2038 bug. New *_adj() functions for ASN1 time structures
954 and X509_time_adj_ex() to cover the extended range. The existing
955 X509_time_adj() is still usable and will no longer have any date issues.
958 *) Delta CRL support. New use deltas option which will attempt to locate
959 and search any appropriate delta CRLs available.
961 This work was sponsored by Google.
964 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
965 code and add additional score elements. Validate alternate CRL paths
966 as part of the CRL checking and indicate a new error "CRL path validation
967 error" in this case. Applications wanting additional details can use
968 the verify callback and check the new "parent" field. If this is not
969 NULL CRL path validation is taking place. Existing applications wont
970 see this because it requires extended CRL support which is off by
973 This work was sponsored by Google.
976 *) Support for freshest CRL extension.
978 This work was sponsored by Google.
981 *) Initial indirect CRL support. Currently only supported in the CRLs
982 passed directly and not via lookup. Process certificate issuer
983 CRL entry extension and lookup CRL entries by bother issuer name
984 and serial number. Check and process CRL issuer entry in IDP extension.
986 This work was sponsored by Google.
989 *) Add support for distinct certificate and CRL paths. The CRL issuer
990 certificate is validated separately in this case. Only enabled if
991 an extended CRL support flag is set: this flag will enable additional
992 CRL functionality in future.
994 This work was sponsored by Google.
997 *) Add support for policy mappings extension.
999 This work was sponsored by Google.
1002 *) Fixes to pathlength constraint, self issued certificate handling,
1003 policy processing to align with RFC3280 and PKITS tests.
1005 This work was sponsored by Google.
1008 *) Support for name constraints certificate extension. DN, email, DNS
1009 and URI types are currently supported.
1011 This work was sponsored by Google.
1014 *) To cater for systems that provide a pointer-based thread ID rather
1015 than numeric, deprecate the current numeric thread ID mechanism and
1016 replace it with a structure and associated callback type. This
1017 mechanism allows a numeric "hash" to be extracted from a thread ID in
1018 either case, and on platforms where pointers are larger than 'long',
1019 mixing is done to help ensure the numeric 'hash' is usable even if it
1020 can't be guaranteed unique. The default mechanism is to use "&errno"
1021 as a pointer-based thread ID to distinguish between threads.
1023 Applications that want to provide their own thread IDs should now use
1024 CRYPTO_THREADID_set_callback() to register a callback that will call
1025 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
1027 Note that ERR_remove_state() is now deprecated, because it is tied
1028 to the assumption that thread IDs are numeric. ERR_remove_state(0)
1029 to free the current thread's error state should be replaced by
1030 ERR_remove_thread_state(NULL).
1032 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
1033 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
1034 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
1035 application was previously providing a numeric thread callback that
1036 was inappropriate for distinguishing threads, then uniqueness might
1037 have been obtained with &errno that happened immediately in the
1038 intermediate development versions of OpenSSL; this is no longer the
1039 case, the numeric thread callback will now override the automatic use
1041 [Geoff Thorpe, with help from Bodo Moeller]
1043 *) Initial support for different CRL issuing certificates. This covers a
1044 simple case where the self issued certificates in the chain exist and
1045 the real CRL issuer is higher in the existing chain.
1047 This work was sponsored by Google.
1050 *) Removed effectively defunct crypto/store from the build.
1053 *) Revamp of STACK to provide stronger type-checking. Still to come:
1054 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
1055 ASN1_STRING, CONF_VALUE.
1058 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
1059 RAM on SSL connections. This option can save about 34k per idle SSL.
1062 *) Revamp of LHASH to provide stronger type-checking. Still to come:
1063 STACK, TXT_DB, bsearch, qsort.
1066 *) Initial support for Cryptographic Message Syntax (aka CMS) based
1067 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
1068 support for data, signedData, compressedData, digestedData and
1069 encryptedData, envelopedData types included. Scripts to check against
1070 RFC4134 examples draft and interop and consistency checks of many
1071 content types and variants.
1074 *) Add options to enc utility to support use of zlib compression BIO.
1077 *) Extend mk1mf to support importing of options and assembly language
1078 files from Configure script, currently only included in VC-WIN32.
1079 The assembly language rules can now optionally generate the source
1080 files from the associated perl scripts.
1083 *) Implement remaining functionality needed to support GOST ciphersuites.
1084 Interop testing has been performed using CryptoPro implementations.
1085 [Victor B. Wagner <vitus@cryptocom.ru>]
1087 *) s390x assembler pack.
1090 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
1094 *) Implement Opaque PRF Input TLS extension as specified in
1095 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
1096 official specification yet and no extension type assignment by
1097 IANA exists, this extension (for now) will have to be explicitly
1098 enabled when building OpenSSL by providing the extension number
1099 to use. For example, specify an option
1101 -DTLSEXT_TYPE_opaque_prf_input=0x9527
1103 to the "config" or "Configure" script to enable the extension,
1104 assuming extension number 0x9527 (which is a completely arbitrary
1105 and unofficial assignment based on the MD5 hash of the Internet
1106 Draft). Note that by doing so, you potentially lose
1107 interoperability with other TLS implementations since these might
1108 be using the same extension number for other purposes.
1110 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
1111 opaque PRF input value to use in the handshake. This will create
1112 an interal copy of the length-'len' string at 'src', and will
1113 return non-zero for success.
1115 To get more control and flexibility, provide a callback function
1118 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
1119 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
1123 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
1126 Callback function 'cb' will be called in handshakes, and is
1127 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
1128 Argument 'arg' is for application purposes (the value as given to
1129 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
1130 be provided to the callback function). The callback function
1131 has to return non-zero to report success: usually 1 to use opaque
1132 PRF input just if possible, or 2 to enforce use of the opaque PRF
1133 input. In the latter case, the library will abort the handshake
1134 if opaque PRF input is not successfully negotiated.
1136 Arguments 'peerinput' and 'len' given to the callback function
1137 will always be NULL and 0 in the case of a client. A server will
1138 see the client's opaque PRF input through these variables if
1139 available (NULL and 0 otherwise). Note that if the server
1140 provides an opaque PRF input, the length must be the same as the
1141 length of the client's opaque PRF input.
1143 Note that the callback function will only be called when creating
1144 a new session (session resumption can resume whatever was
1145 previously negotiated), and will not be called in SSL 2.0
1146 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
1147 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
1148 for applications that need to enforce opaque PRF input.
1152 *) Update ssl code to support digests other than SHA1+MD5 for handshake
1155 [Victor B. Wagner <vitus@cryptocom.ru>]
1157 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1158 RFC4507bis. The encrypted ticket format is an encrypted encoded
1159 SSL_SESSION structure, that way new session features are automatically
1162 If a client application caches session in an SSL_SESSION structure
1163 support is transparent because tickets are now stored in the encoded
1166 The SSL_CTX structure automatically generates keys for ticket
1167 protection in servers so again support should be possible
1168 with no application modification.
1170 If a client or server wishes to disable RFC4507 support then the option
1171 SSL_OP_NO_TICKET can be set.
1173 Add a TLS extension debugging callback to allow the contents of any client
1174 or server extensions to be examined.
1176 This work was sponsored by Google.
1179 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
1180 OpenSSL should now compile cleanly on gcc 4.2
1181 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
1183 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
1184 support including streaming MAC support: this is required for GOST
1185 ciphersuite support.
1186 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
1188 *) Add option -stream to use PKCS#7 streaming in smime utility. New
1189 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
1190 to output in BER and PEM format.
1193 *) Experimental support for use of HMAC via EVP_PKEY interface. This
1194 allows HMAC to be handled via the EVP_DigestSign*() interface. The
1195 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
1196 ENGINE support for HMAC keys which are unextractable. New -mac and
1197 -macopt options to dgst utility.
1200 *) New option -sigopt to dgst utility. Update dgst to use
1201 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
1202 alternative signing paramaters such as X9.31 or PSS in the dgst
1206 *) Change ssl_cipher_apply_rule(), the internal function that does
1207 the work each time a ciphersuite string requests enabling
1208 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
1209 removing ("!foo+bar") a class of ciphersuites: Now it maintains
1210 the order of disabled ciphersuites such that those ciphersuites
1211 that most recently went from enabled to disabled not only stay
1212 in order with respect to each other, but also have higher priority
1213 than other disabled ciphersuites the next time ciphersuites are
1216 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
1217 the same ciphersuites as with "HIGH" alone, but in a specific
1218 order where the PSK ciphersuites come first (since they are the
1219 most recently disabled ciphersuites when "HIGH" is parsed).
1221 Also, change ssl_create_cipher_list() (using this new
1222 funcionality) such that between otherwise identical
1223 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
1227 *) Change ssl_create_cipher_list() so that it automatically
1228 arranges the ciphersuites in reasonable order before starting
1229 to process the rule string. Thus, the definition for "DEFAULT"
1230 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
1231 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
1232 This makes it much easier to arrive at a reasonable default order
1233 in applications for which anonymous ciphers are OK (meaning
1234 that you can't actually use DEFAULT).
1235 [Bodo Moeller; suggested by Victor Duchovni]
1237 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
1238 processing) into multiple integers instead of setting
1239 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
1240 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
1241 (These masks as well as the individual bit definitions are hidden
1242 away into the non-exported interface ssl/ssl_locl.h, so this
1243 change to the definition of the SSL_CIPHER structure shouldn't
1244 affect applications.) This give us more bits for each of these
1245 categories, so there is no longer a need to coagulate AES128 and
1246 AES256 into a single algorithm bit, and to coagulate Camellia128
1247 and Camellia256 into a single algorithm bit, which has led to all
1250 Thus, among other things, the kludge introduced in 0.9.7m and
1251 0.9.8e for masking out AES256 independently of AES128 or masking
1252 out Camellia256 independently of AES256 is not needed here in 0.9.9.
1254 With the change, we also introduce new ciphersuite aliases that
1255 so far were missing: "AES128", "AES256", "CAMELLIA128", and
1259 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
1260 Use the leftmost N bytes of the signature input if the input is
1261 larger than the prime q (with N being the size in bytes of q).
1264 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
1265 it yet and it is largely untested.
1268 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
1271 *) Initial incomplete changes to avoid need for function casts in OpenSSL
1272 some compilers (gcc 4.2 and later) reject their use. Safestack is
1273 reimplemented. Update ASN1 to avoid use of legacy functions.
1276 *) Win32/64 targets are linked with Winsock2.
1279 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
1280 to external functions. This can be used to increase CRL handling
1281 efficiency especially when CRLs are very large by (for example) storing
1282 the CRL revoked certificates in a database.
1285 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
1286 new CRLs added to a directory can be used. New command line option
1287 -verify_return_error to s_client and s_server. This causes real errors
1288 to be returned by the verify callback instead of carrying on no matter
1289 what. This reflects the way a "real world" verify callback would behave.
1292 *) GOST engine, supporting several GOST algorithms and public key formats.
1293 Kindly donated by Cryptocom.
1296 *) Partial support for Issuing Distribution Point CRL extension. CRLs
1297 partitioned by DP are handled but no indirect CRL or reason partitioning
1298 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
1299 selected via a scoring technique which handles IDP and AKID in CRLs.
1302 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
1303 will ultimately be used for all verify operations: this will remove the
1304 X509_STORE dependency on certificate verification and allow alternative
1305 lookup methods. X509_STORE based implementations of these two callbacks.
1308 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
1309 Modify get_crl() to find a valid (unexpired) CRL if possible.
1312 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
1313 this would be called X509_CRL_cmp() but that name is already used by
1314 a function that just compares CRL issuer names. Cache several CRL
1315 extensions in X509_CRL structure and cache CRLDP in X509.
1318 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
1319 this maps equivalent X509_NAME structures into a consistent structure.
1320 Name comparison can then be performed rapidly using memcmp().
1323 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
1327 *) Allow digests to supply their own micalg string for S/MIME type using
1328 the ctrl EVP_MD_CTRL_MICALG.
1331 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
1332 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
1333 ctrl. It can then customise the structure before and/or after signing
1337 *) New function OBJ_add_sigid() to allow application defined signature OIDs
1338 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
1339 to free up any added signature OIDs.
1342 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
1343 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
1344 digest and cipher tables. New options added to openssl utility:
1345 list-message-digest-algorithms and list-cipher-algorithms.
1348 *) Change the array representation of binary polynomials: the list
1349 of degrees of non-zero coefficients is now terminated with -1.
1350 Previously it was terminated with 0, which was also part of the
1351 value; thus, the array representation was not applicable to
1352 polynomials where t^0 has coefficient zero. This change makes
1353 the array representation useful in a more general context.
1356 *) Various modifications and fixes to SSL/TLS cipher string
1357 handling. For ECC, the code now distinguishes between fixed ECDH
1358 with RSA certificates on the one hand and with ECDSA certificates
1359 on the other hand, since these are separate ciphersuites. The
1360 unused code for Fortezza ciphersuites has been removed.
1362 For consistency with EDH, ephemeral ECDH is now called "EECDH"
1363 (not "ECDHE"). For consistency with the code for DH
1364 certificates, use of ECDH certificates is now considered ECDH
1365 authentication, not RSA or ECDSA authentication (the latter is
1366 merely the CA's signing algorithm and not actively used in the
1369 The temporary ciphersuite alias "ECCdraft" is no longer
1370 available, and ECC ciphersuites are no longer excluded from "ALL"
1371 and "DEFAULT". The following aliases now exist for RFC 4492
1372 ciphersuites, most of these by analogy with the DH case:
1374 kECDHr - ECDH cert, signed with RSA
1375 kECDHe - ECDH cert, signed with ECDSA
1376 kECDH - ECDH cert (signed with either RSA or ECDSA)
1377 kEECDH - ephemeral ECDH
1378 ECDH - ECDH cert or ephemeral ECDH
1384 AECDH - anonymous ECDH
1385 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
1389 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
1390 Use correct micalg parameters depending on digest(s) in signed message.
1393 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
1394 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
1397 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
1398 an engine to register a method. Add ENGINE lookups for methods and
1399 functional reference processing.
1402 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
1403 EVP_{Sign,Verify}* which allow an application to customise the signature
1407 *) New -resign option to smime utility. This adds one or more signers
1408 to an existing PKCS#7 signedData structure. Also -md option to use an
1409 alternative message digest algorithm for signing.
1412 *) Tidy up PKCS#7 routines and add new functions to make it easier to
1413 create PKCS7 structures containing multiple signers. Update smime
1414 application to support multiple signers.
1417 *) New -macalg option to pkcs12 utility to allow setting of an alternative
1421 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
1422 Reorganize PBE internals to lookup from a static table using NIDs,
1423 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
1424 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
1425 PRF which will be automatically used with PBES2.
1428 *) Replace the algorithm specific calls to generate keys in "req" with the
1432 *) Update PKCS#7 enveloped data routines to use new API. This is now
1433 supported by any public key method supporting the encrypt operation. A
1434 ctrl is added to allow the public key algorithm to examine or modify
1435 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
1439 *) Add a ctrl to asn1 method to allow a public key algorithm to express
1440 a default digest type to use. In most cases this will be SHA1 but some
1441 algorithms (such as GOST) need to specify an alternative digest. The
1442 return value indicates how strong the prefernce is 1 means optional and
1443 2 is mandatory (that is it is the only supported type). Modify
1444 ASN1_item_sign() to accept a NULL digest argument to indicate it should
1445 use the default md. Update openssl utilities to use the default digest
1446 type for signing if it is not explicitly indicated.
1449 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
1450 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
1451 signing method from the key type. This effectively removes the link
1452 between digests and public key types.
1455 *) Add an OID cross reference table and utility functions. Its purpose is to
1456 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
1457 rsaEncryption. This will allow some of the algorithm specific hackery
1458 needed to use the correct OID to be removed.
1461 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
1462 structures for PKCS7_sign(). They are now set up by the relevant public
1466 *) Add provisional EC pkey method with support for ECDSA and ECDH.
1469 *) Add support for key derivation (agreement) in the API, DH method and
1473 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
1474 public and private key formats. As a side effect these add additional
1475 command line functionality not previously available: DSA signatures can be
1476 generated and verified using pkeyutl and DH key support and generation in
1481 [Oliver Tappe <zooey@hirschkaefer.de>]
1483 *) New make target "install_html_docs" installs HTML renditions of the
1485 [Oliver Tappe <zooey@hirschkaefer.de>]
1487 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
1488 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
1489 support key and parameter generation and add initial key generation
1490 functionality for RSA.
1493 *) Add functions for main EVP_PKEY_method operations. The undocumented
1494 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
1495 EVP_PKEY_{encrypt,decrypt}_old.
1498 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
1499 key API, doesn't do much yet.
1502 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
1503 public key algorithms. New option to openssl utility:
1504 "list-public-key-algorithms" to print out info.
1507 *) Implement the Supported Elliptic Curves Extension for
1508 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1511 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
1512 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
1515 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
1516 utilities such as rsa, dsa, dsaparam etc except they process any key
1520 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
1521 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
1522 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
1526 *) Initial support for pluggable public key ASN1.
1527 De-spaghettify the public key ASN1 handling. Move public and private
1528 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
1529 algorithm specific handling to a single module within the relevant
1530 algorithm directory. Add functions to allow (near) opaque processing
1531 of public and private key structures.
1534 *) Implement the Supported Point Formats Extension for
1535 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1538 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
1539 for the psk identity [hint] and the psk callback functions to the
1540 SSL_SESSION, SSL and SSL_CTX structure.
1543 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
1547 SSL_CTX_use_psk_identity_hint
1548 SSL_get_psk_identity_hint
1549 SSL_get_psk_identity
1550 SSL_use_psk_identity_hint
1552 [Mika Kousa and Pasi Eronen of Nokia Corporation]
1554 *) Add RFC 3161 compliant time stamp request creation, response generation
1555 and response verification functionality.
1556 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
1558 *) Add initial support for TLS extensions, specifically for the server_name
1559 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1560 have new members for a host name. The SSL data structure has an
1561 additional member SSL_CTX *initial_ctx so that new sessions can be
1562 stored in that context to allow for session resumption, even after the
1563 SSL has been switched to a new SSL_CTX in reaction to a client's
1564 server_name extension.
1566 New functions (subject to change):
1568 SSL_get_servername()
1569 SSL_get_servername_type()
1572 New CTRL codes and macros (subject to change):
1574 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1575 - SSL_CTX_set_tlsext_servername_callback()
1576 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1577 - SSL_CTX_set_tlsext_servername_arg()
1578 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1580 openssl s_client has a new '-servername ...' option.
1582 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1583 '-key2 ...', '-servername_fatal' (subject to change). This allows
1584 testing the HostName extension for a specific single host name ('-cert'
1585 and '-key' remain fallbacks for handshakes without HostName
1586 negotiation). If the unrecogninzed_name alert has to be sent, this by
1587 default is a warning; it becomes fatal with the '-servername_fatal'
1590 [Peter Sylvester, Remy Allais, Christophe Renou]
1592 *) Whirlpool hash implementation is added.
1595 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
1596 bn(64,32). Because of instruction set limitations it doesn't have
1597 any negative impact on performance. This was done mostly in order
1598 to make it possible to share assembler modules, such as bn_mul_mont
1599 implementations, between 32- and 64-bit builds without hassle.
1602 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
1603 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
1607 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
1608 dedicated Montgomery multiplication procedure, is introduced.
1609 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
1610 "64-bit" performance on certain 32-bit targets.
1613 *) New option SSL_OP_NO_COMP to disable use of compression selectively
1614 in SSL structures. New SSL ctrl to set maximum send fragment size.
1615 Save memory by seeting the I/O buffer sizes dynamically instead of
1616 using the maximum available value.
1619 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
1620 in addition to the text details.
1623 *) Very, very preliminary EXPERIMENTAL support for printing of general
1624 ASN1 structures. This currently produces rather ugly output and doesn't
1625 handle several customised structures at all.
1628 *) Integrated support for PVK file format and some related formats such
1629 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
1630 these in the 'rsa' and 'dsa' utilities.
1633 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
1636 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
1637 place for the (very old) "NETSCAPE" format certificates which are now
1638 handled using new ASN1 code equivalents.
1641 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
1642 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
1643 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
1646 *) Modify CRL distribution points extension code to print out previously
1647 unsupported fields. Enhance extension setting code to allow setting of
1651 *) Add print and set support for Issuing Distribution Point CRL extension.
1654 *) Change 'Configure' script to enable Camellia by default.
1657 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
1659 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1660 Thanks to Antonio Martin, Enterprise Secure Access Research and
1661 Development, Cisco Systems, Inc. for discovering this bug and
1662 preparing a fix. (CVE-2012-0050)
1665 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
1667 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1668 of the Vaudenay padding oracle attack on CBC mode encryption
1669 which enables an efficient plaintext recovery attack against
1670 the OpenSSL implementation of DTLS. Their attack exploits timing
1671 differences arising during decryption processing. A research
1672 paper describing this attack can be found at:
1673 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1674 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1675 Security Group at Royal Holloway, University of London
1676 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1677 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1678 for preparing the fix. (CVE-2011-4108)
1679 [Robin Seggelmann, Michael Tuexen]
1681 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
1682 [Ben Laurie, Kasper <ekasper@google.com>]
1684 *) Clear bytes used for block padding of SSL 3.0 records.
1686 [Adam Langley (Google)]
1688 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1689 Kadianakis <desnacked@gmail.com> for discovering this issue and
1690 Adam Langley for preparing the fix. (CVE-2011-4619)
1691 [Adam Langley (Google)]
1693 *) Prevent malformed RFC3779 data triggering an assertion failure.
1694 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1695 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1696 [Rob Austein <sra@hactrn.net>]
1698 *) Fix ssl_ciph.c set-up race.
1699 [Adam Langley (Google)]
1701 *) Fix spurious failures in ecdsatest.c.
1702 [Emilia Käsper (Google)]
1704 *) Fix the BIO_f_buffer() implementation (which was mixing different
1705 interpretations of the '..._len' fields).
1706 [Adam Langley (Google)]
1708 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1709 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1710 threads won't reuse the same blinding coefficients.
1712 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1713 lock to call BN_BLINDING_invert_ex, and avoids one use of
1714 BN_BLINDING_update for each BN_BLINDING structure (previously,
1715 the last update always remained unused).
1716 [Emilia Käsper (Google)]
1718 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1719 for multi-threaded use of ECDH.
1720 [Adam Langley (Google)]
1722 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1725 *) Add protection against ECDSA timing attacks as mentioned in the paper
1726 by Billy Bob Brumley and Nicola Tuveri, see:
1728 http://eprint.iacr.org/2011/232.pdf
1730 [Billy Bob Brumley and Nicola Tuveri]
1732 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
1734 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1735 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1737 *) Fix bug in string printing code: if *any* escaping is enabled we must
1738 escape the escape character (backslash) or the resulting string is
1742 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
1744 *) Disable code workaround for ancient and obsolete Netscape browsers
1745 and servers: an attacker can use it in a ciphersuite downgrade attack.
1746 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1749 *) Fixed J-PAKE implementation error, originally discovered by
1750 Sebastien Martini, further info and confirmation from Stefan
1751 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1754 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
1756 *) Fix extension code to avoid race conditions which can result in a buffer
1757 overrun vulnerability: resumed sessions must not be modified as they can
1758 be shared by multiple threads. CVE-2010-3864
1761 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
1764 *) Don't reencode certificate when calculating signature: cache and use
1765 the original encoding instead. This makes signature verification of
1766 some broken encodings work correctly.
1769 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
1770 is also one of the inputs.
1771 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
1773 *) Don't repeatedly append PBE algorithms to table if they already exist.
1774 Sort table on each new add. This effectively makes the table read only
1775 after all algorithms are added and subsequent calls to PKCS12_pbe_add
1779 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
1781 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
1784 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
1785 access or freeing data twice (CVE-2010-0742)
1786 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
1788 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
1789 common in certificates and some applications which only call
1790 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
1794 Reduce copying into .apps and .test in makevms.com
1795 Don't try to use blank CA certificate in CA.com
1796 Allow use of C files from original directories in maketests.com
1797 [Steven M. Schweda" <sms@antinode.info>]
1799 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
1801 *) When rejecting SSL/TLS records due to an incorrect version number, never
1802 update s->server with a new major version number. As of
1803 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
1804 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
1805 the previous behavior could result in a read attempt at NULL when
1806 receiving specific incorrect SSL/TLS records once record payload
1807 protection is active. (CVE-2010-0740)
1808 [Bodo Moeller, Adam Langley <agl@chromium.org>]
1810 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
1811 could be crashed if the relevant tables were not present (e.g. chrooted).
1812 [Tomas Hoger <thoger@redhat.com>]
1814 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
1816 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
1817 [Martin Olsson, Neel Mehta]
1819 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
1820 accommodate for stack sorting, always a write lock!).
1823 *) On some versions of WIN32 Heap32Next is very slow. This can cause
1824 excessive delays in the RAND_poll(): over a minute. As a workaround
1825 include a time check in the inner Heap32Next loop too.
1828 *) The code that handled flushing of data in SSL/TLS originally used the
1829 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
1830 the problem outlined in PR#1949. The fix suggested there however can
1831 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
1832 of Apache). So instead simplify the code to flush unconditionally.
1833 This should be fine since flushing with no data to flush is a no op.
1836 *) Handle TLS versions 2.0 and later properly and correctly use the
1837 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
1838 off ancient servers have a habit of sticking around for a while...
1841 *) Modify compression code so it frees up structures without using the
1842 ex_data callbacks. This works around a problem where some applications
1843 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
1844 restarting) then use compression (e.g. SSL with compression) later.
1845 This results in significant per-connection memory leaks and
1846 has caused some security issues including CVE-2008-1678 and
1850 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
1851 change when encrypting or decrypting.
1854 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
1855 connect and renegotiate with servers which do not support RI.
1856 Until RI is more widely deployed this option is enabled by default.
1859 *) Add "missing" ssl ctrls to clear options and mode.
1862 *) If client attempts to renegotiate and doesn't support RI respond with
1863 a no_renegotiation alert as required by RFC5746. Some renegotiating
1864 TLS clients will continue a connection gracefully when they receive
1865 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1866 waiting for a server hello which it will never receive. Now we treat a
1867 received no_renegotiation alert as a fatal error. This is because
1868 applications requesting a renegotiation might well expect it to succeed
1869 and would have no code in place to handle the server denying it so the
1870 only safe thing to do is to terminate the connection.
1873 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1874 peer supports secure renegotiation and 0 otherwise. Print out peer
1875 renegotiation support in s_client/s_server.
1878 *) Replace the highly broken and deprecated SPKAC certification method with
1879 the updated NID creation version. This should correctly handle UTF8.
1882 *) Implement RFC5746. Re-enable renegotiation but require the extension
1883 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1884 turns out to be a bad idea. It has been replaced by
1885 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1886 SSL_CTX_set_options(). This is really not recommended unless you
1887 know what you are doing.
1888 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1890 *) Fixes to stateless session resumption handling. Use initial_ctx when
1891 issuing and attempting to decrypt tickets in case it has changed during
1892 servername handling. Use a non-zero length session ID when attempting
1893 stateless session resumption: this makes it possible to determine if
1894 a resumption has occurred immediately after receiving server hello
1895 (several places in OpenSSL subtly assume this) instead of later in
1899 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1900 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1901 fixes for a few places where the return code is not checked
1903 [Julia Lawall <julia@diku.dk>]
1905 *) Add --strict-warnings option to Configure script to include devteam
1906 warnings in other configurations.
1909 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1910 makes it possible to install openssl libraries in locations which
1911 have names other than "lib", for example "/usr/lib64" which some
1913 [Steve Henson, based on patch from Jeremy Utley]
1915 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1916 X690 8.9.12 and can produce some misleading textual output of OIDs.
1917 [Steve Henson, reported by Dan Kaminsky]
1919 *) Delete MD2 from algorithm tables. This follows the recommendation in
1920 several standards that it is not used in new applications due to
1921 several cryptographic weaknesses. For binary compatibility reasons
1922 the MD2 API is still compiled in by default.
1925 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1929 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1930 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1932 [Guenter <lists@gknw.net>]
1934 *) Fix the server certificate chain building code to use X509_verify_cert(),
1935 it used to have an ad-hoc builder which was unable to cope with anything
1936 other than a simple chain.
1937 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1939 *) Don't check self signed certificate signatures in X509_verify_cert()
1940 by default (a flag can override this): it just wastes time without
1941 adding any security. As a useful side effect self signed root CAs
1942 with non-FIPS digests are now usable in FIPS mode.
1945 *) In dtls1_process_out_of_seq_message() the check if the current message
1946 is already buffered was missing. For every new message was memory
1947 allocated, allowing an attacker to perform an denial of service attack
1948 with sending out of seq handshake messages until there is no memory
1949 left. Additionally every future messege was buffered, even if the
1950 sequence number made no sense and would be part of another handshake.
1951 So only messages with sequence numbers less than 10 in advance will be
1952 buffered. (CVE-2009-1378)
1953 [Robin Seggelmann, discovered by Daniel Mentz]
1955 *) Records are buffered if they arrive with a future epoch to be
1956 processed after finishing the corresponding handshake. There is
1957 currently no limitation to this buffer allowing an attacker to perform
1958 a DOS attack with sending records with future epochs until there is no
1959 memory left. This patch adds the pqueue_size() function to detemine
1960 the size of a buffer and limits the record buffer to 100 entries.
1962 [Robin Seggelmann, discovered by Daniel Mentz]
1964 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
1965 parent structure is freed. (CVE-2009-1379)
1968 *) Handle non-blocking I/O properly in SSL_shutdown() call.
1969 [Darryl Miles <darryl-mailinglists@netbauds.net>]
1972 [Ilya O. <vrghost@gmail.com>]
1974 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
1976 *) Disable renegotiation completely - this fixes a severe security
1977 problem (CVE-2009-3555) at the cost of breaking all
1978 renegotiation. Renegotiation can be re-enabled by setting
1979 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
1980 run-time. This is really not recommended unless you know what
1984 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
1986 *) Don't set val to NULL when freeing up structures, it is freed up by
1987 underlying code. If sizeof(void *) > sizeof(long) this can result in
1988 zeroing past the valid field. (CVE-2009-0789)
1989 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
1991 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
1992 checked correctly. This would allow some invalid signed attributes to
1993 appear to verify correctly. (CVE-2009-0591)
1994 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1996 *) Reject UniversalString and BMPString types with invalid lengths. This
1997 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
1998 a legal length. (CVE-2009-0590)
2001 *) Set S/MIME signing as the default purpose rather than setting it
2002 unconditionally. This allows applications to override it at the store
2006 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2007 to handle some structures.
2010 *) Improve efficiency of mem_gets: don't search whole buffer each time
2012 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2014 *) New -hex option for openssl rand.
2017 *) Print out UTF8String and NumericString when parsing ASN1.
2020 *) Support NumericString type for name components.
2023 *) Allow CC in the environment to override the automatically chosen
2024 compiler. Note that nothing is done to ensure flags work with the
2028 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2030 *) Properly check EVP_VerifyFinal() and similar return values
2032 [Ben Laurie, Bodo Moeller, Google Security Team]
2034 *) Enable TLS extensions by default.
2037 *) Allow the CHIL engine to be loaded, whether the application is
2038 multithreaded or not. (This does not release the developer from the
2039 obligation to set up the dynamic locking callbacks.)
2040 [Sander Temme <sander@temme.net>]
2042 *) Use correct exit code if there is an error in dgst command.
2043 [Steve Henson; problem pointed out by Roland Dirlewanger]
2045 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2046 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2049 *) Add experimental JPAKE support, including demo authentication in
2050 s_client and s_server.
2053 *) Set the comparison function in v3_addr_canonize().
2054 [Rob Austein <sra@hactrn.net>]
2056 *) Add support for XMPP STARTTLS in s_client.
2057 [Philip Paeps <philip@freebsd.org>]
2059 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2060 to ensure that even with this option, only ciphersuites in the
2061 server's preference list will be accepted. (Note that the option
2062 applies only when resuming a session, so the earlier behavior was
2063 just about the algorithm choice for symmetric cryptography.)
2066 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2068 *) Fix NULL pointer dereference if a DTLS server received
2069 ChangeCipherSpec as first record (CVE-2009-1386).
2072 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
2073 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2076 *) The fix in 0.9.8c that supposedly got rid of unsafe
2077 double-checked locking was incomplete for RSA blinding,
2078 addressing just one layer of what turns out to have been
2079 doubly unsafe triple-checked locking.
2081 So now fix this for real by retiring the MONT_HELPER macro
2082 in crypto/rsa/rsa_eay.c.
2084 [Bodo Moeller; problem pointed out by Marius Schilder]
2086 *) Various precautionary measures:
2088 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2090 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2091 (NB: This would require knowledge of the secret session ticket key
2092 to exploit, in which case you'd be SOL either way.)
2094 - Change bn_nist.c so that it will properly handle input BIGNUMs
2095 outside the expected range.
2097 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2100 [Neel Mehta, Bodo Moeller]
2102 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2103 the load fails. Useful for distros.
2104 [Ben Laurie and the FreeBSD team]
2106 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2109 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2112 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2114 This work was sponsored by Logica.
2117 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2118 keystores. Support for SSL/TLS client authentication too.
2119 Not compiled unless enable-capieng specified to Configure.
2121 This work was sponsored by Logica.
2124 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2125 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2126 attribute creation routines such as certifcate requests and PKCS#12
2130 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2132 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2133 handshake which could lead to a cilent crash as found using the
2134 Codenomicon TLS test suite (CVE-2008-1672)
2135 [Steve Henson, Mark Cox]
2137 *) Fix double free in TLS server name extensions which could lead to
2138 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2141 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2143 Clear the error queue to ensure that error entries left from
2144 older function calls do not interfere with the correct operation.
2145 [Lutz Jaenicke, Erik de Castro Lopo]
2147 *) Remove root CA certificates of commercial CAs:
2149 The OpenSSL project does not recommend any specific CA and does not
2150 have any policy with respect to including or excluding any CA.
2151 Therefore it does not make any sense to ship an arbitrary selection
2152 of root CA certificates with the OpenSSL software.
2155 *) RSA OAEP patches to fix two separate invalid memory reads.
2156 The first one involves inputs when 'lzero' is greater than
2157 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
2158 before the beginning of from). The second one involves inputs where
2159 the 'db' section contains nothing but zeroes (there is a one-byte
2160 invalid read after the end of 'db').
2161 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2163 *) Partial backport from 0.9.9-dev:
2165 Introduce bn_mul_mont (dedicated Montgomery multiplication
2166 procedure) as a candidate for BIGNUM assembler implementation.
2167 While 0.9.9-dev uses assembler for various architectures, only
2168 x86_64 is available by default here in the 0.9.8 branch, and
2169 32-bit x86 is available through a compile-time setting.
2171 To try the 32-bit x86 assembler implementation, use Configure
2172 option "enable-montasm" (which exists only for this backport).
2174 As "enable-montasm" for 32-bit x86 disclaims code stability
2175 anyway, in this constellation we activate additional code
2176 backported from 0.9.9-dev for further performance improvements,
2177 namely BN_from_montgomery_word. (To enable this otherwise,
2178 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
2180 [Andy Polyakov (backport partially by Bodo Moeller)]
2182 *) Add TLS session ticket callback. This allows an application to set
2183 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
2184 values. This is useful for key rollover for example where several key
2185 sets may exist with different names.
2188 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
2189 This was broken until now in 0.9.8 releases, such that the only way
2190 a registered ENGINE could be used (assuming it initialises
2191 successfully on the host) was to explicitly set it as the default
2192 for the relevant algorithms. This is in contradiction with 0.9.7
2193 behaviour and the documentation. With this fix, when an ENGINE is
2194 registered into a given algorithm's table of implementations, the
2195 'uptodate' flag is reset so that auto-discovery will be used next
2196 time a new context for that algorithm attempts to select an
2198 [Ian Lister (tweaked by Geoff Thorpe)]
2200 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
2201 implemention in the following ways:
2203 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
2206 Lack of BER streaming support means one pass streaming processing is
2207 only supported if data is detached: setting the streaming flag is
2208 ignored for embedded content.
2210 CMS support is disabled by default and must be explicitly enabled
2211 with the enable-cms configuration option.
2214 *) Update the GMP engine glue to do direct copies between BIGNUM and
2215 mpz_t when openssl and GMP use the same limb size. Otherwise the
2216 existing "conversion via a text string export" trick is still used.
2217 [Paul Sheer <paulsheer@gmail.com>]
2219 *) Zlib compression BIO. This is a filter BIO which compressed and
2220 uncompresses any data passed through it.
2223 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
2224 RFC3394 compatible AES key wrapping.
2227 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
2228 sets string data without copying. X509_ALGOR_set0() and
2229 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
2230 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
2231 from an X509_ATTRIBUTE structure optionally checking it occurs only
2232 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
2236 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
2237 to get the expected BN_FLG_CONSTTIME behavior.
2238 [Bodo Moeller (Google)]
2242 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
2243 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
2244 - added some more tests to do_tests.pl
2245 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
2246 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
2247 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
2248 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
2249 - various changes to netware.pl to enable gcc-cross builds on Win32
2251 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
2252 - various changes to fix missing prototype warnings
2253 - fixed x86nasm.pl to create correct asm files for NASM COFF output
2254 - added AES, WHIRLPOOL and CPUID assembler code to build files
2255 - added missing AES assembler make rules to mk1mf.pl
2256 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
2257 [Guenter Knauf <eflash@gmx.net>]
2259 *) Implement certificate status request TLS extension defined in RFC3546.
2260 A client can set the appropriate parameters and receive the encoded
2261 OCSP response via a callback. A server can query the supplied parameters
2262 and set the encoded OCSP response in the callback. Add simplified examples
2263 to s_client and s_server.
2266 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
2268 *) Fix various bugs:
2269 + Binary incompatibility of ssl_ctx_st structure
2270 + DTLS interoperation with non-compliant servers
2271 + Don't call get_session_cb() without proposed session
2272 + Fix ia64 assembler code
2273 [Andy Polyakov, Steve Henson]
2275 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
2277 *) DTLS Handshake overhaul. There were longstanding issues with
2278 OpenSSL DTLS implementation, which were making it impossible for
2279 RFC 4347 compliant client to communicate with OpenSSL server.
2280 Unfortunately just fixing these incompatibilities would "cut off"
2281 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
2282 server keeps tolerating non RFC compliant syntax. The opposite is
2283 not true, 0.9.8f client can not communicate with earlier server.
2284 This update even addresses CVE-2007-4995.
2287 *) Changes to avoid need for function casts in OpenSSL: some compilers
2288 (gcc 4.2 and later) reject their use.
2289 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
2292 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2293 RFC4507bis. The encrypted ticket format is an encrypted encoded
2294 SSL_SESSION structure, that way new session features are automatically
2297 If a client application caches session in an SSL_SESSION structure
2298 support is transparent because tickets are now stored in the encoded
2301 The SSL_CTX structure automatically generates keys for ticket
2302 protection in servers so again support should be possible
2303 with no application modification.
2305 If a client or server wishes to disable RFC4507 support then the option
2306 SSL_OP_NO_TICKET can be set.
2308 Add a TLS extension debugging callback to allow the contents of any client
2309 or server extensions to be examined.
2311 This work was sponsored by Google.
2314 *) Add initial support for TLS extensions, specifically for the server_name
2315 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2316 have new members for a host name. The SSL data structure has an
2317 additional member SSL_CTX *initial_ctx so that new sessions can be
2318 stored in that context to allow for session resumption, even after the
2319 SSL has been switched to a new SSL_CTX in reaction to a client's
2320 server_name extension.
2322 New functions (subject to change):
2324 SSL_get_servername()
2325 SSL_get_servername_type()
2328 New CTRL codes and macros (subject to change):
2330 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2331 - SSL_CTX_set_tlsext_servername_callback()
2332 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2333 - SSL_CTX_set_tlsext_servername_arg()
2334 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2336 openssl s_client has a new '-servername ...' option.
2338 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2339 '-key2 ...', '-servername_fatal' (subject to change). This allows
2340 testing the HostName extension for a specific single host name ('-cert'
2341 and '-key' remain fallbacks for handshakes without HostName
2342 negotiation). If the unrecogninzed_name alert has to be sent, this by
2343 default is a warning; it becomes fatal with the '-servername_fatal'
2346 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
2348 *) Add AES and SSE2 assembly language support to VC++ build.
2351 *) Mitigate attack on final subtraction in Montgomery reduction.
2354 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
2355 (which previously caused an internal error).
2358 *) Squeeze another 10% out of IGE mode when in != out.
2361 *) AES IGE mode speedup.
2362 [Dean Gaudet (Google)]
2364 *) Add the Korean symmetric 128-bit cipher SEED (see
2365 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
2366 add SEED ciphersuites from RFC 4162:
2368 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
2369 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
2370 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
2371 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
2373 To minimize changes between patchlevels in the OpenSSL 0.9.8
2374 series, SEED remains excluded from compilation unless OpenSSL
2375 is configured with 'enable-seed'.
2376 [KISA, Bodo Moeller]
2378 *) Mitigate branch prediction attacks, which can be practical if a
2379 single processor is shared, allowing a spy process to extract
2380 information. For detailed background information, see
2381 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
2382 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
2383 and Necessary Software Countermeasures"). The core of the change
2384 are new versions BN_div_no_branch() and
2385 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
2386 respectively, which are slower, but avoid the security-relevant
2387 conditional branches. These are automatically called by BN_div()
2388 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
2389 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
2390 remove a conditional branch.
2392 BN_FLG_CONSTTIME is the new name for the previous
2393 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
2394 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
2395 in the exponent causes BN_mod_exp_mont() to use the alternative
2396 implementation in BN_mod_exp_mont_consttime().) The old name
2397 remains as a deprecated alias.
2399 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
2400 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
2401 constant-time implementations for more than just exponentiation.
2402 Here too the old name is kept as a deprecated alias.
2404 BN_BLINDING_new() will now use BN_dup() for the modulus so that
2405 the BN_BLINDING structure gets an independent copy of the
2406 modulus. This means that the previous "BIGNUM *m" argument to
2407 BN_BLINDING_new() and to BN_BLINDING_create_param() now
2408 essentially becomes "const BIGNUM *m", although we can't actually
2409 change this in the header file before 0.9.9. It allows
2410 RSA_setup_blinding() to use BN_with_flags() on the modulus to
2411 enable BN_FLG_CONSTTIME.
2413 [Matthew D Wood (Intel Corp)]
2415 *) In the SSL/TLS server implementation, be strict about session ID
2416 context matching (which matters if an application uses a single
2417 external cache for different purposes). Previously,
2418 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
2419 set. This did ensure strict client verification, but meant that,
2420 with applications using a single external cache for quite
2421 different requirements, clients could circumvent ciphersuite
2422 restrictions for a given session ID context by starting a session
2423 in a different context.
2426 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2427 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2428 authentication-only ciphersuites.
2431 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
2432 not complete and could lead to a possible single byte overflow
2433 (CVE-2007-5135) [Ben Laurie]
2435 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
2437 *) Since AES128 and AES256 (and similarly Camellia128 and
2438 Camellia256) share a single mask bit in the logic of
2439 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2440 kludge to work properly if AES128 is available and AES256 isn't
2441 (or if Camellia128 is available and Camellia256 isn't).
2444 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
2445 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
2446 When a point or a seed is encoded in a BIT STRING, we need to
2447 prevent the removal of trailing zero bits to get the proper DER
2448 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
2449 of a NamedBitList, for which trailing 0 bits need to be removed.)
2452 *) Have SSL/TLS server implementation tolerate "mismatched" record
2453 protocol version while receiving ClientHello even if the
2454 ClientHello is fragmented. (The server can't insist on the
2455 particular protocol version it has chosen before the ServerHello
2456 message has informed the client about his choice.)
2459 *) Add RFC 3779 support.
2460 [Rob Austein for ARIN, Ben Laurie]
2462 *) Load error codes if they are not already present instead of using a
2463 static variable. This allows them to be cleanly unloaded and reloaded.
2464 Improve header file function name parsing.
2467 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
2468 or CAPABILITY handshake as required by RFCs.
2471 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
2473 *) Introduce limits to prevent malicious keys being able to
2474 cause a denial of service. (CVE-2006-2940)
2475 [Steve Henson, Bodo Moeller]
2477 *) Fix ASN.1 parsing of certain invalid structures that can result
2478 in a denial of service. (CVE-2006-2937) [Steve Henson]
2480 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2481 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2483 *) Fix SSL client code which could crash if connecting to a
2484 malicious SSLv2 server. (CVE-2006-4343)
2485 [Tavis Ormandy and Will Drewry, Google Security Team]
2487 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
2488 match only those. Before that, "AES256-SHA" would be interpreted
2489 as a pattern and match "AES128-SHA" too (since AES128-SHA got
2490 the same strength classification in 0.9.7h) as we currently only
2491 have a single AES bit in the ciphersuite description bitmap.
2492 That change, however, also applied to ciphersuite strings such as
2493 "RC4-MD5" that intentionally matched multiple ciphersuites --
2494 namely, SSL 2.0 ciphersuites in addition to the more common ones
2495 from SSL 3.0/TLS 1.0.
2497 So we change the selection algorithm again: Naming an explicit
2498 ciphersuite selects this one ciphersuite, and any other similar
2499 ciphersuite (same bitmap) from *other* protocol versions.
2500 Thus, "RC4-MD5" again will properly select both the SSL 2.0
2501 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
2503 Since SSL 2.0 does not have any ciphersuites for which the
2504 128/256 bit distinction would be relevant, this works for now.
2505 The proper fix will be to use different bits for AES128 and
2506 AES256, which would have avoided the problems from the beginning;
2507 however, bits are scarce, so we can only do this in a new release
2508 (not just a patchlevel) when we can change the SSL_CIPHER
2509 definition to split the single 'unsigned long mask' bitmap into
2510 multiple values to extend the available space.
2514 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
2516 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2517 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2519 *) Add AES IGE and biIGE modes.
2522 *) Change the Unix randomness entropy gathering to use poll() when
2523 possible instead of select(), since the latter has some
2524 undesirable limitations.
2525 [Darryl Miles via Richard Levitte and Bodo Moeller]
2527 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
2528 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
2529 cannot be implicitly activated as part of, e.g., the "AES" alias.
2530 However, please upgrade to OpenSSL 0.9.9[-dev] for
2531 non-experimental use of the ECC ciphersuites to get TLS extension
2532 support, which is required for curve and point format negotiation
2533 to avoid potential handshake problems.
2536 *) Disable rogue ciphersuites:
2538 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
2539 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
2540 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
2542 The latter two were purportedly from
2543 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
2546 Also deactivate the remaining ciphersuites from
2547 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
2548 unofficial, and the ID has long expired.
2551 *) Fix RSA blinding Heisenbug (problems sometimes occured on
2552 dual-core machines) and other potential thread-safety issues.
2555 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
2556 versions), which is now available for royalty-free use
2557 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
2558 Also, add Camellia TLS ciphersuites from RFC 4132.
2560 To minimize changes between patchlevels in the OpenSSL 0.9.8
2561 series, Camellia remains excluded from compilation unless OpenSSL
2562 is configured with 'enable-camellia'.
2565 *) Disable the padding bug check when compression is in use. The padding
2566 bug check assumes the first packet is of even length, this is not
2567 necessarily true if compresssion is enabled and can result in false
2568 positives causing handshake failure. The actual bug test is ancient
2569 code so it is hoped that implementations will either have fixed it by
2570 now or any which still have the bug do not support compression.
2573 Changes between 0.9.8a and 0.9.8b [04 May 2006]
2575 *) When applying a cipher rule check to see if string match is an explicit
2576 cipher suite and only match that one cipher suite if it is.
2579 *) Link in manifests for VC++ if needed.
2580 [Austin Ziegler <halostatue@gmail.com>]
2582 *) Update support for ECC-based TLS ciphersuites according to
2583 draft-ietf-tls-ecc-12.txt with proposed changes (but without
2584 TLS extensions, which are supported starting with the 0.9.9
2585 branch, not in the OpenSSL 0.9.8 branch).
2588 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
2589 opaque EVP_CIPHER_CTX handling.
2592 *) Fixes and enhancements to zlib compression code. We now only use
2593 "zlib1.dll" and use the default __cdecl calling convention on Win32
2594 to conform with the standards mentioned here:
2595 http://www.zlib.net/DLL_FAQ.txt
2596 Static zlib linking now works on Windows and the new --with-zlib-include
2597 --with-zlib-lib options to Configure can be used to supply the location
2598 of the headers and library. Gracefully handle case where zlib library
2602 *) Several fixes and enhancements to the OID generation code. The old code
2603 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
2604 handle numbers larger than ULONG_MAX, truncated printing and had a
2605 non standard OBJ_obj2txt() behaviour.
2608 *) Add support for building of engines under engine/ as shared libraries
2609 under VC++ build system.
2612 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
2613 Hopefully, we will not see any false combination of paths any more.
2616 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
2618 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2619 (part of SSL_OP_ALL). This option used to disable the
2620 countermeasure against man-in-the-middle protocol-version
2621 rollback in the SSL 2.0 server implementation, which is a bad
2622 idea. (CVE-2005-2969)
2624 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2625 for Information Security, National Institute of Advanced Industrial
2626 Science and Technology [AIST], Japan)]
2628 *) Add two function to clear and return the verify parameter flags.
2631 *) Keep cipherlists sorted in the source instead of sorting them at
2632 runtime, thus removing the need for a lock.
2635 *) Avoid some small subgroup attacks in Diffie-Hellman.
2636 [Nick Mathewson and Ben Laurie]
2638 *) Add functions for well-known primes.
2641 *) Extended Windows CE support.
2642 [Satoshi Nakamura and Andy Polyakov]
2644 *) Initialize SSL_METHOD structures at compile time instead of during
2645 runtime, thus removing the need for a lock.
2648 *) Make PKCS7_decrypt() work even if no certificate is supplied by
2649 attempting to decrypt each encrypted key in turn. Add support to
2653 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
2655 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
2658 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
2661 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
2662 key into the same file any more.
2665 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
2668 *) Add -utf8 command line and config file option to 'ca'.
2669 [Stefan <stf@udoma.org]
2671 *) Removed the macro des_crypt(), as it seems to conflict with some
2672 libraries. Use DES_crypt().
2675 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
2676 involves renaming the source and generated shared-libs for
2677 both. The engines will accept the corrected or legacy ids
2678 ('ncipher' and '4758_cca' respectively) when binding. NB,
2679 this only applies when building 'shared'.
2680 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
2682 *) Add attribute functions to EVP_PKEY structure. Modify
2683 PKCS12_create() to recognize a CSP name attribute and
2684 use it. Make -CSP option work again in pkcs12 utility.
2687 *) Add new functionality to the bn blinding code:
2688 - automatic re-creation of the BN_BLINDING parameters after
2689 a fixed number of uses (currently 32)
2690 - add new function for parameter creation
2691 - introduce flags to control the update behaviour of the
2692 BN_BLINDING parameters
2693 - hide BN_BLINDING structure
2694 Add a second BN_BLINDING slot to the RSA structure to improve
2695 performance when a single RSA object is shared among several
2699 *) Add support for DTLS.
2700 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
2702 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
2703 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
2706 *) Remove buggy and incompletet DH cert support from
2707 ssl/ssl_rsa.c and ssl/s3_both.c
2710 *) Use SHA-1 instead of MD5 as the default digest algorithm for
2711 the apps/openssl applications.
2714 *) Compile clean with "-Wall -Wmissing-prototypes
2715 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
2716 DEBUG_SAFESTACK must also be set.
2719 *) Change ./Configure so that certain algorithms can be disabled by default.
2720 The new counterpiece to "no-xxx" is "enable-xxx".
2722 The patented RC5 and MDC2 algorithms will now be disabled unless
2723 "enable-rc5" and "enable-mdc2", respectively, are specified.
2725 (IDEA remains enabled despite being patented. This is because IDEA
2726 is frequently required for interoperability, and there is no license
2727 fee for non-commercial use. As before, "no-idea" can be used to
2728 avoid this algorithm.)
2732 *) Add processing of proxy certificates (see RFC 3820). This work was
2733 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
2734 EGEE (Enabling Grids for E-science in Europe).
2737 *) RC4 performance overhaul on modern architectures/implementations, such
2738 as Intel P4, IA-64 and AMD64.
2741 *) New utility extract-section.pl. This can be used specify an alternative
2742 section number in a pod file instead of having to treat each file as
2743 a separate case in Makefile. This can be done by adding two lines to the
2746 =for comment openssl_section:XXX
2748 The blank line is mandatory.
2752 *) New arguments -certform, -keyform and -pass for s_client and s_server
2753 to allow alternative format key and certificate files and passphrase
2757 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
2758 update associated structures and add various utility functions.
2760 Add new policy related verify parameters, include policy checking in
2761 standard verify code. Enhance 'smime' application with extra parameters
2762 to support policy checking and print out.
2765 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
2766 Nehemiah processors. These extensions support AES encryption in hardware
2767 as well as RNG (though RNG support is currently disabled).
2768 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
2770 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
2773 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
2774 [Andy Polyakov and a number of other people]
2776 *) Improved PowerPC platform support. Most notably BIGNUM assembler
2777 implementation contributed by IBM.
2778 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
2780 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
2781 exponent rather than 'unsigned long'. There is a corresponding change to
2782 the new 'rsa_keygen' element of the RSA_METHOD structure.
2783 [Jelte Jansen, Geoff Thorpe]
2785 *) Functionality for creating the initial serial number file is now
2786 moved from CA.pl to the 'ca' utility with a new option -create_serial.
2788 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
2789 number file to 1, which is bound to cause problems. To avoid
2790 the problems while respecting compatibility between different 0.9.7
2791 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
2792 CA.pl for serial number initialization. With the new release 0.9.8,
2793 we can fix the problem directly in the 'ca' utility.)
2796 *) Reduced header interdepencies by declaring more opaque objects in
2797 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
2798 give fewer recursive includes, which could break lazy source code - so
2799 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
2800 developers should define this symbol when building and using openssl to
2801 ensure they track the recommended behaviour, interfaces, [etc], but
2802 backwards-compatible behaviour prevails when this isn't defined.
2805 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
2808 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
2809 This will generate a random key of the appropriate length based on the
2810 cipher context. The EVP_CIPHER can provide its own random key generation
2811 routine to support keys of a specific form. This is used in the des and
2812 3des routines to generate a key of the correct parity. Update S/MIME
2813 code to use new functions and hence generate correct parity DES keys.
2814 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
2815 valid (weak or incorrect parity).
2818 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
2819 as looking them up. This is useful when the verified structure may contain
2820 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
2821 present unless the new PKCS7_NO_CRL flag is asserted.
2824 *) Extend ASN1 oid configuration module. It now additionally accepts the
2827 shortName = some long name, 1.2.3.4
2830 *) Reimplemented the BN_CTX implementation. There is now no more static
2831 limitation on the number of variables it can handle nor the depth of the
2832 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
2833 information can now expand as required, and rather than having a single
2834 static array of bignums, BN_CTX now uses a linked-list of such arrays
2835 allowing it to expand on demand whilst maintaining the usefulness of
2836 BN_CTX's "bundling".
2839 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
2840 to allow all RSA operations to function using a single BN_CTX.
2843 *) Preliminary support for certificate policy evaluation and checking. This
2844 is initially intended to pass the tests outlined in "Conformance Testing
2845 of Relying Party Client Certificate Path Processing Logic" v1.07.
2848 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
2849 remained unused and not that useful. A variety of other little bignum
2850 tweaks and fixes have also been made continuing on from the audit (see
2854 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
2855 associated ASN1, EVP and SSL functions and old ASN1 macros.
2858 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
2859 and this should never fail. So the return value from the use of
2860 BN_set_word() (which can fail due to needless expansion) is now deprecated;
2861 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
2864 *) BN_CTX_get() should return zero-valued bignums, providing the same
2865 initialised value as BN_new().
2866 [Geoff Thorpe, suggested by Ulf Möller]
2868 *) Support for inhibitAnyPolicy certificate extension.
2871 *) An audit of the BIGNUM code is underway, for which debugging code is
2872 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2873 is considered valid when processing BIGNUMs, and causes execution to
2874 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2875 further steps are taken to deliberately pollute unused data in BIGNUM
2876 structures to try and expose faulty code further on. For now, openssl will
2877 (in its default mode of operation) continue to tolerate the inconsistent
2878 forms that it has tolerated in the past, but authors and packagers should
2879 consider trying openssl and their own applications when compiled with
2880 these debugging symbols defined. It will help highlight potential bugs in
2881 their own code, and will improve the test coverage for OpenSSL itself. At
2882 some point, these tighter rules will become openssl's default to improve
2883 maintainability, though the assert()s and other overheads will remain only
2884 in debugging configurations. See bn.h for more details.
2885 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2887 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2888 that can only be obtained through BN_CTX_new() (which implicitly
2889 initialises it). The presence of this function only made it possible
2890 to overwrite an existing structure (and cause memory leaks).
2893 *) Because of the callback-based approach for implementing LHASH as a
2894 template type, lh_insert() adds opaque objects to hash-tables and
2895 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2896 to clean up those corresponding objects before destroying the hash table
2897 (and losing the object pointers). So some over-zealous constifications in
2898 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2899 objects as "const" and the lh_doall[_arg] callback wrappers are not
2900 prototyped to have "const" restrictions on the object pointers they are
2901 given (and so aren't required to cast them away any more).
2904 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2905 (speed) prefers to use its own implementation. The two implementations
2906 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2907 its object type properly exposed (MS_TM) instead of casting to/from "char
2908 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2909 aren't necessarily the greatest nomenclatures - but this is what was used
2910 internally to the implementation so I've used that for now.
2913 *) Ensure that deprecated functions do not get compiled when
2914 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2915 the self-tests were still using deprecated key-generation functions so
2916 these have been updated also.
2919 *) Reorganise PKCS#7 code to separate the digest location functionality
2920 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2921 New function PKCS7_set_digest() to set the digest type for PKCS#7
2922 digestedData type. Add additional code to correctly generate the
2923 digestedData type and add support for this type in PKCS7 initialization
2927 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2928 structure of type "other".
2931 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2932 sure the loop does correctly stop and breaking ("division by zero")
2933 modulus operations are not performed. The (pre-generated) prime
2934 table crypto/bn/bn_prime.h was already correct, but it could not be
2935 re-generated on some platforms because of the "division by zero"
2936 situation in the script.
2937 [Ralf S. Engelschall]
2939 *) Update support for ECC-based TLS ciphersuites according to
2940 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2941 SHA-1 now is only used for "small" curves (where the
2942 representation of a field element takes up to 24 bytes); for
2943 larger curves, the field element resulting from ECDH is directly
2944 used as premaster secret.
2945 [Douglas Stebila (Sun Microsystems Laboratories)]
2947 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2948 curve secp160r1 to the tests.
2949 [Douglas Stebila (Sun Microsystems Laboratories)]
2951 *) Add the possibility to load symbols globally with DSO.
2952 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
2954 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
2955 control of the error stack.
2958 *) Add support for STORE in ENGINE.
2961 *) Add the STORE type. The intention is to provide a common interface
2962 to certificate and key stores, be they simple file-based stores, or
2963 HSM-type store, or LDAP stores, or...
2964 NOTE: The code is currently UNTESTED and isn't really used anywhere.
2967 *) Add a generic structure called OPENSSL_ITEM. This can be used to
2968 pass a list of arguments to any function as well as provide a way
2969 for a function to pass data back to the caller.
2972 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
2973 works like BUF_strdup() but can be used to duplicate a portion of
2974 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
2978 *) Add the function sk_find_ex() which works like sk_find(), but will
2979 return an index to an element even if an exact match couldn't be
2980 found. The index is guaranteed to point at the element where the
2981 searched-for key would be inserted to preserve sorting order.
2984 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
2985 takes an extra flags argument for optional functionality. Currently,
2986 the following flags are defined:
2988 OBJ_BSEARCH_VALUE_ON_NOMATCH
2989 This one gets OBJ_bsearch_ex() to return a pointer to the first
2990 element where the comparing function returns a negative or zero
2993 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
2994 This one gets OBJ_bsearch_ex() to return a pointer to the first
2995 element where the comparing function returns zero. This is useful
2996 if there are more than one element where the comparing function
3000 *) Make it possible to create self-signed certificates with 'openssl ca'
3001 in such a way that the self-signed certificate becomes part of the
3002 CA database and uses the same mechanisms for serial number generation
3003 as all other certificate signing. The new flag '-selfsign' enables
3004 this functionality. Adapt CA.sh and CA.pl.in.
3007 *) Add functionality to check the public key of a certificate request
3008 against a given private. This is useful to check that a certificate
3009 request can be signed by that key (self-signing).
3012 *) Make it possible to have multiple active certificates with the same
3013 subject in the CA index file. This is done only if the keyword
3014 'unique_subject' is set to 'no' in the main CA section (default
3015 if 'CA_default') of the configuration file. The value is saved
3016 with the database itself in a separate index attribute file,
3017 named like the index file with '.attr' appended to the name.
3020 *) Generate muti valued AVAs using '+' notation in config files for
3024 *) Support for nameConstraints certificate extension.
3027 *) Support for policyConstraints certificate extension.
3030 *) Support for policyMappings certificate extension.
3033 *) Make sure the default DSA_METHOD implementation only uses its
3034 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
3035 and change its own handlers to be NULL so as to remove unnecessary
3036 indirection. This lets alternative implementations fallback to the
3037 default implementation more easily.
3040 *) Support for directoryName in GeneralName related extensions
3044 *) Make it possible to link applications using Makefile.shared.
3045 Make that possible even when linking against static libraries!
3048 *) Support for single pass processing for S/MIME signing. This now
3049 means that S/MIME signing can be done from a pipe, in addition
3050 cleartext signing (multipart/signed type) is effectively streaming
3051 and the signed data does not need to be all held in memory.
3053 This is done with a new flag PKCS7_STREAM. When this flag is set
3054 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
3055 is done after the data is output (and digests calculated) in
3056 SMIME_write_PKCS7().
3059 *) Add full support for -rpath/-R, both in shared libraries and
3060 applications, at least on the platforms where it's known how
3064 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
3065 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
3066 will now compute a table of multiples of the generator that
3067 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
3068 faster (notably in the case of a single point multiplication,
3069 scalar * generator).
3070 [Nils Larsch, Bodo Moeller]
3072 *) IPv6 support for certificate extensions. The various extensions
3073 which use the IP:a.b.c.d can now take IPv6 addresses using the
3074 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
3078 *) Added an ENGINE that implements RSA by performing private key
3079 exponentiations with the GMP library. The conversions to and from
3080 GMP's mpz_t format aren't optimised nor are any montgomery forms
3081 cached, and on x86 it appears OpenSSL's own performance has caught up.
3082 However there are likely to be other architectures where GMP could
3083 provide a boost. This ENGINE is not built in by default, but it can be
3084 specified at Configure time and should be accompanied by the necessary
3085 linker additions, eg;
3086 ./config -DOPENSSL_USE_GMP -lgmp
3089 *) "openssl engine" will not display ENGINE/DSO load failure errors when
3090 testing availability of engines with "-t" - the old behaviour is
3091 produced by increasing the feature's verbosity with "-tt".
3094 *) ECDSA routines: under certain error conditions uninitialized BN objects
3095 could be freed. Solution: make sure initialization is performed early
3096 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
3100 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
3101 and DH_METHOD (eg. by ENGINE implementations) to override the normal
3102 software implementations. For DSA and DH, parameter generation can
3103 also be overriden by providing the appropriate method callbacks.
3106 *) Change the "progress" mechanism used in key-generation and
3107 primality testing to functions that take a new BN_GENCB pointer in
3108 place of callback/argument pairs. The new API functions have "_ex"
3109 postfixes and the older functions are reimplemented as wrappers for
3110 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
3111 declarations of the old functions to help (graceful) attempts to
3112 migrate to the new functions. Also, the new key-generation API
3113 functions operate on a caller-supplied key-structure and return
3114 success/failure rather than returning a key or NULL - this is to
3115 help make "keygen" another member function of RSA_METHOD etc.
3117 Example for using the new callback interface:
3119 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
3123 BN_GENCB_set(&my_cb, my_callback, my_arg);
3125 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
3126 /* For the meaning of a, b in calls to my_callback(), see the
3127 * documentation of the function that calls the callback.
3128 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
3129 * my_callback should return 1 if it wants BN_is_prime_ex()
3130 * to continue, or 0 to stop.
3135 *) Change the ZLIB compression method to be stateful, and make it
3136 available to TLS with the number defined in
3137 draft-ietf-tls-compression-04.txt.
3140 *) Add the ASN.1 structures and functions for CertificatePair, which
3141 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
3143 CertificatePair ::= SEQUENCE {
3144 forward [0] Certificate OPTIONAL,
3145 reverse [1] Certificate OPTIONAL,
3146 -- at least one of the pair shall be present -- }
3148 Also implement the PEM functions to read and write certificate
3149 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
3151 This needed to be defined, mostly for the sake of the LDAP
3152 attribute crossCertificatePair, but may prove useful elsewhere as
3156 *) Make it possible to inhibit symlinking of shared libraries in
3157 Makefile.shared, for Cygwin's sake.
3160 *) Extend the BIGNUM API by creating a function
3161 void BN_set_negative(BIGNUM *a, int neg);
3162 and a macro that behave like
3163 int BN_is_negative(const BIGNUM *a);
3165 to avoid the need to access 'a->neg' directly in applications.
3168 *) Implement fast modular reduction for pseudo-Mersenne primes
3169 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
3170 EC_GROUP_new_curve_GFp() will now automatically use this
3172 [Nils Larsch <nla@trustcenter.de>]
3174 *) Add new lock type (CRYPTO_LOCK_BN).
3177 *) Change the ENGINE framework to automatically load engines
3178 dynamically from specific directories unless they could be
3179 found to already be built in or loaded. Move all the
3180 current engines except for the cryptodev one to a new
3182 The engines in engines/ are built as shared libraries if
3183 the "shared" options was given to ./Configure or ./config.
3184 Otherwise, they are inserted in libcrypto.a.
3185 /usr/local/ssl/engines is the default directory for dynamic
3186 engines, but that can be overriden at configure time through
3187 the usual use of --prefix and/or --openssldir, and at run
3188 time with the environment variable OPENSSL_ENGINES.
3189 [Geoff Thorpe and Richard Levitte]
3191 *) Add Makefile.shared, a helper makefile to build shared
3192 libraries. Addapt Makefile.org.
3195 *) Add version info to Win32 DLLs.
3196 [Peter 'Luna' Runestig" <peter@runestig.com>]
3198 *) Add new 'medium level' PKCS#12 API. Certificates and keys
3199 can be added using this API to created arbitrary PKCS#12
3200 files while avoiding the low level API.
3202 New options to PKCS12_create(), key or cert can be NULL and
3203 will then be omitted from the output file. The encryption
3204 algorithm NIDs can be set to -1 for no encryption, the mac
3205 iteration count can be set to 0 to omit the mac.
3207 Enhance pkcs12 utility by making the -nokeys and -nocerts
3208 options work when creating a PKCS#12 file. New option -nomac
3209 to omit the mac, NONE can be set for an encryption algorithm.
3210 New code is modified to use the enhanced PKCS12_create()
3211 instead of the low level API.
3214 *) Extend ASN1 encoder to support indefinite length constructed
3215 encoding. This can output sequences tags and octet strings in
3216 this form. Modify pk7_asn1.c to support indefinite length
3217 encoding. This is experimental and needs additional code to
3218 be useful, such as an ASN1 bio and some enhanced streaming
3221 Extend template encode functionality so that tagging is passed
3222 down to the template encoder.
3225 *) Let 'openssl req' fail if an argument to '-newkey' is not
3226 recognized instead of using RSA as a default.
3229 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
3230 As these are not official, they are not included in "ALL";
3231 the "ECCdraft" ciphersuite group alias can be used to select them.
3232 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
3234 *) Add ECDH engine support.
3235 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
3237 *) Add ECDH in new directory crypto/ecdh/.
3238 [Douglas Stebila (Sun Microsystems Laboratories)]
3240 *) Let BN_rand_range() abort with an error after 100 iterations
3241 without success (which indicates a broken PRNG).
3244 *) Change BN_mod_sqrt() so that it verifies that the input value
3245 is really the square of the return value. (Previously,
3246 BN_mod_sqrt would show GIGO behaviour.)
3249 *) Add named elliptic curves over binary fields from X9.62, SECG,
3250 and WAP/WTLS; add OIDs that were still missing.
3252 [Sheueling Chang Shantz and Douglas Stebila
3253 (Sun Microsystems Laboratories)]
3255 *) Extend the EC library for elliptic curves over binary fields
3256 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
3259 EC_GF2m_simple_method
3263 EC_GROUP_new_curve_GF2m
3264 EC_GROUP_set_curve_GF2m
3265 EC_GROUP_get_curve_GF2m
3266 EC_POINT_set_affine_coordinates_GF2m
3267 EC_POINT_get_affine_coordinates_GF2m
3268 EC_POINT_set_compressed_coordinates_GF2m
3270 Point compression for binary fields is disabled by default for
3271 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
3274 As binary polynomials are represented as BIGNUMs, various members
3275 of the EC_GROUP and EC_POINT data structures can be shared
3276 between the implementations for prime fields and binary fields;
3277 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
3278 are essentially identical to their ..._GFp counterparts.
3279 (For simplicity, the '..._GFp' prefix has been dropped from
3280 various internal method names.)
3282 An internal 'field_div' method (similar to 'field_mul' and
3283 'field_sqr') has been added; this is used only for binary fields.
3285 [Sheueling Chang Shantz and Douglas Stebila
3286 (Sun Microsystems Laboratories)]
3288 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
3289 through methods ('mul', 'precompute_mult').
3291 The generic implementations (now internally called 'ec_wNAF_mul'
3292 and 'ec_wNAF_precomputed_mult') remain the default if these
3293 methods are undefined.
3295 [Sheueling Chang Shantz and Douglas Stebila
3296 (Sun Microsystems Laboratories)]
3298 *) New function EC_GROUP_get_degree, which is defined through
3299 EC_METHOD. For curves over prime fields, this returns the bit
3300 length of the modulus.
3302 [Sheueling Chang Shantz and Douglas Stebila
3303 (Sun Microsystems Laboratories)]
3305 *) New functions EC_GROUP_dup, EC_POINT_dup.
3306 (These simply call ..._new and ..._copy).
3308 [Sheueling Chang Shantz and Douglas Stebila
3309 (Sun Microsystems Laboratories)]
3311 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
3312 Polynomials are represented as BIGNUMs (where the sign bit is not
3313 used) in the following functions [macros]:
3316 BN_GF2m_sub [= BN_GF2m_add]
3317 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
3318 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
3319 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
3321 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
3322 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
3323 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
3324 BN_GF2m_cmp [= BN_ucmp]
3326 (Note that only the 'mod' functions are actually for fields GF(2^m).
3327 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
3329 For some functions, an the irreducible polynomial defining a
3330 field can be given as an 'unsigned int[]' with strictly
3331 decreasing elements giving the indices of those bits that are set;
3332 i.e., p[] represents the polynomial
3333 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
3335 p[0] > p[1] > ... > p[k] = 0.
3336 This applies to the following functions:
3341 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
3342 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
3344 BN_GF2m_mod_sqrt_arr
3345 BN_GF2m_mod_solve_quad_arr
3349 Conversion can be performed by the following functions:
3354 bntest.c has additional tests for binary polynomial arithmetic.
3356 Two implementations for BN_GF2m_mod_div() are available.
3357 The default algorithm simply uses BN_GF2m_mod_inv() and
3358 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
3359 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
3360 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
3362 [Sheueling Chang Shantz and Douglas Stebila
3363 (Sun Microsystems Laboratories)]
3365 *) Add new error code 'ERR_R_DISABLED' that can be used when some
3366 functionality is disabled at compile-time.
3367 [Douglas Stebila <douglas.stebila@sun.com>]
3369 *) Change default behaviour of 'openssl asn1parse' so that more
3370 information is visible when viewing, e.g., a certificate:
3372 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
3373 mode the content of non-printable OCTET STRINGs is output in a
3374 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
3375 avoid the appearance of a printable string.
3376 [Nils Larsch <nla@trustcenter.de>]
3378 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
3380 EC_GROUP_set_asn1_flag()
3381 EC_GROUP_get_asn1_flag()
3382 EC_GROUP_set_point_conversion_form()
3383 EC_GROUP_get_point_conversion_form()
3384 These control ASN1 encoding details:
3385 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
3386 has been set to OPENSSL_EC_NAMED_CURVE.
3387 - Points are encoded in uncompressed form by default; options for
3388 asn1_for are as for point2oct, namely
3389 POINT_CONVERSION_COMPRESSED
3390 POINT_CONVERSION_UNCOMPRESSED
3391 POINT_CONVERSION_HYBRID
3393 Also add 'seed' and 'seed_len' members to EC_GROUP with access
3396 EC_GROUP_get0_seed()
3397 EC_GROUP_get_seed_len()
3398 This is used only for ASN1 purposes (so far).
3399 [Nils Larsch <nla@trustcenter.de>]
3401 *) Add 'field_type' member to EC_METHOD, which holds the NID
3402 of the appropriate field type OID. The new function
3403 EC_METHOD_get_field_type() returns this value.
3404 [Nils Larsch <nla@trustcenter.de>]
3409 EC_POINT_point2hex()
3410 EC_POINT_hex2point()
3411 providing useful interfaces to EC_POINT_point2oct() and
3412 EC_POINT_oct2point().
3413 [Nils Larsch <nla@trustcenter.de>]
3415 *) Change internals of the EC library so that the functions
3416 EC_GROUP_set_generator()
3417 EC_GROUP_get_generator()
3418 EC_GROUP_get_order()
3419 EC_GROUP_get_cofactor()
3420 are implemented directly in crypto/ec/ec_lib.c and not dispatched
3421 to methods, which would lead to unnecessary code duplication when
3422 adding different types of curves.
3423 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
3425 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
3426 arithmetic, and such that modified wNAFs are generated
3427 (which avoid length expansion in many cases).
3430 *) Add a function EC_GROUP_check_discriminant() (defined via
3431 EC_METHOD) that verifies that the curve discriminant is non-zero.
3433 Add a function EC_GROUP_check() that makes some sanity tests
3434 on a EC_GROUP, its generator and order. This includes
3435 EC_GROUP_check_discriminant().
3436 [Nils Larsch <nla@trustcenter.de>]
3438 *) Add ECDSA in new directory crypto/ecdsa/.
3440 Add applications 'openssl ecparam' and 'openssl ecdsa'
3441 (these are based on 'openssl dsaparam' and 'openssl dsa').
3443 ECDSA support is also included in various other files across the
3444 library. Most notably,
3445 - 'openssl req' now has a '-newkey ecdsa:file' option;
3446 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
3447 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
3448 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
3449 them suitable for ECDSA where domain parameters must be
3450 extracted before the specific public key;
3451 - ECDSA engine support has been added.
3452 [Nils Larsch <nla@trustcenter.de>]
3454 *) Include some named elliptic curves, and add OIDs from X9.62,
3455 SECG, and WAP/WTLS. Each curve can be obtained from the new
3457 EC_GROUP_new_by_curve_name(),
3458 and the list of available named curves can be obtained with
3459 EC_get_builtin_curves().
3460 Also add a 'curve_name' member to EC_GROUP objects, which can be
3462 EC_GROUP_set_curve_name()
3463 EC_GROUP_get_curve_name()
3464 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
3466 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
3467 was actually never needed) and in BN_mul(). The removal in BN_mul()
3468 required a small change in bn_mul_part_recursive() and the addition
3469 of the functions bn_cmp_part_words(), bn_sub_part_words() and
3470 bn_add_part_words(), which do the same thing as bn_cmp_words(),
3471 bn_sub_words() and bn_add_words() except they take arrays with
3475 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
3477 *) Cleanse PEM buffers before freeing them since they may contain
3479 [Benjamin Bennett <ben@psc.edu>]
3481 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3482 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3483 authentication-only ciphersuites.
3486 *) Since AES128 and AES256 share a single mask bit in the logic of
3487 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3488 kludge to work properly if AES128 is available and AES256 isn't.
3491 *) Expand security boundary to match 1.1.1 module.
3494 *) Remove redundant features: hash file source, editing of test vectors
3495 modify fipsld to use external fips_premain.c signature.
3498 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
3499 run algorithm test programs.
3502 *) Make algorithm test programs more tolerant of whitespace.
3505 *) Have SSL/TLS server implementation tolerate "mismatched" record
3506 protocol version while receiving ClientHello even if the
3507 ClientHello is fragmented. (The server can't insist on the
3508 particular protocol version it has chosen before the ServerHello
3509 message has informed the client about his choice.)
3512 *) Load error codes if they are not already present instead of using a
3513 static variable. This allows them to be cleanly unloaded and reloaded.
3516 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
3518 *) Introduce limits to prevent malicious keys being able to
3519 cause a denial of service. (CVE-2006-2940)
3520 [Steve Henson, Bodo Moeller]
3522 *) Fix ASN.1 parsing of certain invalid structures that can result
3523 in a denial of service. (CVE-2006-2937) [Steve Henson]
3525 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3526 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3528 *) Fix SSL client code which could crash if connecting to a
3529 malicious SSLv2 server. (CVE-2006-4343)
3530 [Tavis Ormandy and Will Drewry, Google Security Team]
3532 *) Change ciphersuite string processing so that an explicit
3533 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
3534 will no longer include "AES128-SHA"), and any other similar
3535 ciphersuite (same bitmap) from *other* protocol versions (so that
3536 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
3537 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
3538 changes from 0.9.8b and 0.9.8d.
3541 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
3543 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3544 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3546 *) Change the Unix randomness entropy gathering to use poll() when
3547 possible instead of select(), since the latter has some
3548 undesirable limitations.
3549 [Darryl Miles via Richard Levitte and Bodo Moeller]
3551 *) Disable rogue ciphersuites:
3553 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3554 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3555 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3557 The latter two were purportedly from
3558 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3561 Also deactive the remaining ciphersuites from
3562 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3563 unofficial, and the ID has long expired.
3566 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3567 dual-core machines) and other potential thread-safety issues.
3570 Changes between 0.9.7i and 0.9.7j [04 May 2006]
3572 *) Adapt fipsld and the build system to link against the validated FIPS
3573 module in FIPS mode.
3576 *) Fixes for VC++ 2005 build under Windows.
3579 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
3580 from a Windows bash shell such as MSYS. It is autodetected from the
3581 "config" script when run from a VC++ environment. Modify standard VC++
3582 build to use fipscanister.o from the GNU make build.
3585 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
3587 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
3588 The value now differs depending on if you build for FIPS or not.
3589 BEWARE! A program linked with a shared FIPSed libcrypto can't be
3590 safely run with a non-FIPSed libcrypto, as it may crash because of
3591 the difference induced by this change.
3594 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
3596 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3597 (part of SSL_OP_ALL). This option used to disable the
3598 countermeasure against man-in-the-middle protocol-version
3599 rollback in the SSL 2.0 server implementation, which is a bad
3600 idea. (CVE-2005-2969)
3602 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3603 for Information Security, National Institute of Advanced Industrial
3604 Science and Technology [AIST], Japan)]
3606 *) Minimal support for X9.31 signatures and PSS padding modes. This is
3607 mainly for FIPS compliance and not fully integrated at this stage.
3610 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
3611 the exponentiation using a fixed-length exponent. (Otherwise,
3612 the information leaked through timing could expose the secret key
3613 after many signatures; cf. Bleichenbacher's attack on DSA with
3617 *) Make a new fixed-window mod_exp implementation the default for
3618 RSA, DSA, and DH private-key operations so that the sequence of
3619 squares and multiplies and the memory access pattern are
3620 independent of the particular secret key. This will mitigate
3621 cache-timing and potential related attacks.
3623 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
3624 and this is automatically used by BN_mod_exp_mont() if the new flag
3625 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
3626 will use this BN flag for private exponents unless the flag
3627 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
3628 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
3630 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
3632 *) Change the client implementation for SSLv23_method() and
3633 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
3634 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
3635 (Previously, the SSL 2.0 backwards compatible Client Hello
3636 message format would be used even with SSL_OP_NO_SSLv2.)
3639 *) Add support for smime-type MIME parameter in S/MIME messages which some
3643 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
3644 a threadsafe manner. Modify rsa code to use new function and add calls
3645 to dsa and dh code (which had race conditions before).
3648 *) Include the fixed error library code in the C error file definitions
3649 instead of fixing them up at runtime. This keeps the error code
3650 structures constant.
3653 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
3655 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
3658 *) Fixes for newer kerberos headers. NB: the casts are needed because
3659 the 'length' field is signed on one version and unsigned on another
3660 with no (?) obvious way to tell the difference, without these VC++
3661 complains. Also the "definition" of FAR (blank) is no longer included
3662 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
3663 some needed definitions.
3666 *) Undo Cygwin change.
3669 *) Added support for proxy certificates according to RFC 3820.
3670 Because they may be a security thread to unaware applications,
3671 they must be explicitely allowed in run-time. See
3672 docs/HOWTO/proxy_certificates.txt for further information.
3675 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
3677 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
3678 server and client random values. Previously
3679 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
3680 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
3682 This change has negligible security impact because:
3684 1. Server and client random values still have 24 bytes of pseudo random
3687 2. Server and client random values are sent in the clear in the initial
3690 3. The master secret is derived using the premaster secret (48 bytes in
3691 size for static RSA ciphersuites) as well as client server and random
3694 The OpenSSL team would like to thank the UK NISCC for bringing this issue
3697 [Stephen Henson, reported by UK NISCC]
3699 *) Use Windows randomness collection on Cygwin.
3702 *) Fix hang in EGD/PRNGD query when communication socket is closed
3703 prematurely by EGD/PRNGD.
3704 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
3706 *) Prompt for pass phrases when appropriate for PKCS12 input format.
3709 *) Back-port of selected performance improvements from development
3710 branch, as well as improved support for PowerPC platforms.
3713 *) Add lots of checks for memory allocation failure, error codes to indicate
3714 failure and freeing up memory if a failure occurs.
3715 [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
3717 *) Add new -passin argument to dgst.
3720 *) Perform some character comparisons of different types in X509_NAME_cmp:
3721 this is needed for some certificates that reencode DNs into UTF8Strings
3722 (in violation of RFC3280) and can't or wont issue name rollover
3726 *) Make an explicit check during certificate validation to see that
3727 the CA setting in each certificate on the chain is correct. As a
3728 side effect always do the following basic checks on extensions,
3729 not just when there's an associated purpose to the check:
3731 - if there is an unhandled critical extension (unless the user
3732 has chosen to ignore this fault)
3733 - if the path length has been exceeded (if one is set at all)
3734 - that certain extensions fit the associated purpose (if one has
3738 Changes between 0.9.7d and 0.9.7e [25 Oct 2004]
3740 *) Avoid a race condition when CRLs are checked in a multi threaded
3741 environment. This would happen due to the reordering of the revoked
3742 entries during signature checking and serial number lookup. Now the
3743 encoding is cached and the serial number sort performed under a lock.
3744 Add new STACK function sk_is_sorted().
3747 *) Add Delta CRL to the extension code.
3750 *) Various fixes to s3_pkt.c so alerts are sent properly.
3751 [David Holmes <d.holmes@f5.com>]
3753 *) Reduce the chances of duplicate issuer name and serial numbers (in
3754 violation of RFC3280) using the OpenSSL certificate creation utilities.
3755 This is done by creating a random 64 bit value for the initial serial
3756 number when a serial number file is created or when a self signed
3757 certificate is created using 'openssl req -x509'. The initial serial
3758 number file is created using 'openssl x509 -next_serial' in CA.pl
3759 rather than being initialized to 1.
3762 Changes between 0.9.7c and 0.9.7d [17 Mar 2004]
3764 *) Fix null-pointer assignment in do_change_cipher_spec() revealed
3765 by using the Codenomicon TLS Test Tool (CVE-2004-0079)
3766 [Joe Orton, Steve Henson]
3768 *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
3770 [Joe Orton, Steve Henson]
3772 *) Make it possible to have multiple active certificates with the same
3773 subject in the CA index file. This is done only if the keyword
3774 'unique_subject' is set to 'no' in the main CA section (default
3775 if 'CA_default') of the configuration file. The value is saved
3776 with the database itself in a separate index attribute file,
3777 named like the index file with '.attr' appended to the name.
3780 *) X509 verify fixes. Disable broken certificate workarounds when
3781 X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
3782 keyUsage extension present. Don't accept CRLs with unhandled critical
3783 extensions: since verify currently doesn't process CRL extensions this
3784 rejects a CRL with *any* critical extensions. Add new verify error codes
3788 *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
3789 A clarification of RFC2560 will require the use of OCTET STRINGs and
3790 some implementations cannot handle the current raw format. Since OpenSSL
3791 copies and compares OCSP nonces as opaque blobs without any attempt at
3792 parsing them this should not create any compatibility issues.
3795 *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
3796 calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
3797 this HMAC (and other) operations are several times slower than OpenSSL
3801 *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
3802 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3804 *) Use the correct content when signing type "other".
3807 Changes between 0.9.7b and 0.9.7c [30 Sep 2003]
3809 *) Fix various bugs revealed by running the NISCC test suite:
3811 Stop out of bounds reads in the ASN1 code when presented with
3812 invalid tags (CVE-2003-0543 and CVE-2003-0544).
3814 Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
3816 If verify callback ignores invalid public key errors don't try to check
3817 certificate signature with the NULL public key.
3821 *) New -ignore_err option in ocsp application to stop the server
3822 exiting on the first error in a request.
3825 *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
3826 if the server requested one: as stated in TLS 1.0 and SSL 3.0
3830 *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
3831 extra data after the compression methods not only for TLS 1.0
3832 but also for SSL 3.0 (as required by the specification).
3833 [Bodo Moeller; problem pointed out by Matthias Loepfe]
3835 *) Change X509_certificate_type() to mark the key as exported/exportable
3836 when it's 512 *bits* long, not 512 bytes.
3839 *) Change AES_cbc_encrypt() so it outputs exact multiple of
3840 blocks during encryption.
3843 *) Various fixes to base64 BIO and non blocking I/O. On write
3844 flushes were not handled properly if the BIO retried. On read
3845 data was not being buffered properly and had various logic bugs.
3846 This also affects blocking I/O when the data being decoded is a
3850 *) Various S/MIME bugfixes and compatibility changes:
3851 output correct application/pkcs7 MIME type if
3852 PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
3853 Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
3854 of files as .eml work). Correctly handle very long lines in MIME
3858 Changes between 0.9.7a and 0.9.7b [10 Apr 2003]
3860 *) Countermeasure against the Klima-Pokorny-Rosa extension of
3861 Bleichbacher's attack on PKCS #1 v1.5 padding: treat
3862 a protocol version number mismatch like a decryption error
3863 in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
3866 *) Turn on RSA blinding by default in the default implementation
3867 to avoid a timing attack. Applications that don't want it can call
3868 RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
3869 They would be ill-advised to do so in most cases.
3870 [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
3872 *) Change RSA blinding code so that it works when the PRNG is not
3873 seeded (in this case, the secret RSA exponent is abused as
3874 an unpredictable seed -- if it is not unpredictable, there
3875 is no point in blinding anyway). Make RSA blinding thread-safe
3876 by remembering the creator's thread ID in rsa->blinding and
3877 having all other threads use local one-time blinding factors
3878 (this requires more computation than sharing rsa->blinding, but
3879 avoids excessive locking; and if an RSA object is not shared
3880 between threads, blinding will still be very fast).
3883 *) Fixed a typo bug that would cause ENGINE_set_default() to set an
3884 ENGINE as defaults for all supported algorithms irrespective of
3885 the 'flags' parameter. 'flags' is now honoured, so applications
3886 should make sure they are passing it correctly.
3889 *) Target "mingw" now allows native Windows code to be generated in
3890 the Cygwin environment as well as with the MinGW compiler.
3893 Changes between 0.9.7 and 0.9.7a [19 Feb 2003]
3895 *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
3896 via timing by performing a MAC computation even if incorrrect
3897 block cipher padding has been found. This is a countermeasure
3898 against active attacks where the attacker has to distinguish
3899 between bad padding and a MAC verification error. (CVE-2003-0078)
3901 [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
3902 Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
3903 Martin Vuagnoux (EPFL, Ilion)]
3905 *) Make the no-err option work as intended. The intention with no-err
3906 is not to have the whole error stack handling routines removed from
3907 libcrypto, it's only intended to remove all the function name and
3908 reason texts, thereby removing some of the footprint that may not
3909 be interesting if those errors aren't displayed anyway.
3911 NOTE: it's still possible for any application or module to have it's
3912 own set of error texts inserted. The routines are there, just not
3913 used by default when no-err is given.
3916 *) Add support for FreeBSD on IA64.
3917 [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
3919 *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
3920 Kerberos function mit_des_cbc_cksum(). Before this change,
3921 the value returned by DES_cbc_cksum() was like the one from
3922 mit_des_cbc_cksum(), except the bytes were swapped.
3923 [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
3925 *) Allow an application to disable the automatic SSL chain building.
3926 Before this a rather primitive chain build was always performed in
3927 ssl3_output_cert_chain(): an application had no way to send the
3928 correct chain if the automatic operation produced an incorrect result.
3930 Now the chain builder is disabled if either:
3932 1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
3934 2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
3936 The reasoning behind this is that an application would not want the
3937 auto chain building to take place if extra chain certificates are
3938 present and it might also want a means of sending no additional
3939 certificates (for example the chain has two certificates and the
3943 *) Add the possibility to build without the ENGINE framework.
3944 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3946 *) Under Win32 gmtime() can return NULL: check return value in
3947 OPENSSL_gmtime(). Add error code for case where gmtime() fails.
3950 *) DSA routines: under certain error conditions uninitialized BN objects
3951 could be freed. Solution: make sure initialization is performed early
3952 enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
3953 Nils Larsch <nla@trustcenter.de> via PR#459)
3956 *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
3957 checked on reconnect on the client side, therefore session resumption
3958 could still fail with a "ssl session id is different" error. This
3959 behaviour is masked when SSL_OP_ALL is used due to
3960 SSL_OP_MICROSOFT_SESS_ID_BUG being set.
3961 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3962 followup to PR #377.
3965 *) IA-32 assembler support enhancements: unified ELF targets, support
3966 for SCO/Caldera platforms, fix for Cygwin shared build.
3969 *) Add support for FreeBSD on sparc64. As a consequence, support for
3970 FreeBSD on non-x86 processors is separate from x86 processors on
3971 the config script, much like the NetBSD support.
3972 [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
3974 Changes between 0.9.6h and 0.9.7 [31 Dec 2002]
3976 [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
3979 *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
3980 code (06) was taken as the first octet of the session ID and the last
3981 octet was ignored consequently. As a result SSLv2 client side session
3982 caching could not have worked due to the session ID mismatch between
3984 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3988 *) Change the declaration of needed Kerberos libraries to use EX_LIBS
3989 instead of the special (and badly supported) LIBKRB5. LIBKRB5 is
3993 *) The hw_ncipher.c engine requires dynamic locks. Unfortunately, it
3994 seems that in spite of existing for more than a year, many application
3995 author have done nothing to provide the necessary callbacks, which
3996 means that this particular engine will not work properly anywhere.
3997 This is a very unfortunate situation which forces us, in the name
3998 of usability, to give the hw_ncipher.c a static lock, which is part
4000 NOTE: This is for the 0.9.7 series ONLY. This hack will never
4001 appear in 0.9.8 or later. We EXPECT application authors to have
4002 dealt properly with this when 0.9.8 is released (unless we actually
4003 make such changes in the libcrypto locking code that changes will
4004 have to be made anyway).
4007 *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
4008 octets have been read, EOF or an error occurs. Without this change
4009 some truncated ASN1 structures will not produce an error.
4012 *) Disable Heimdal support, since it hasn't been fully implemented.
4013 Still give the possibility to force the use of Heimdal, but with
4014 warnings and a request that patches get sent to openssl-dev.
4017 *) Add the VC-CE target, introduce the WINCE sysname, and add
4018 INSTALL.WCE and appropriate conditionals to make it build.
4019 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
4021 *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
4022 cygssl-x.y.z.dll, where x, y and z are the major, minor and
4023 edit numbers of the version.
4024 [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
4026 *) Introduce safe string copy and catenation functions
4027 (BUF_strlcpy() and BUF_strlcat()).
4028 [Ben Laurie (CHATS) and Richard Levitte]
4030 *) Avoid using fixed-size buffers for one-line DNs.
4031 [Ben Laurie (CHATS)]
4033 *) Add BUF_MEM_grow_clean() to avoid information leakage when
4034 resizing buffers containing secrets, and use where appropriate.
4035 [Ben Laurie (CHATS)]
4037 *) Avoid using fixed size buffers for configuration file location.
4038 [Ben Laurie (CHATS)]
4040 *) Avoid filename truncation for various CA files.
4041 [Ben Laurie (CHATS)]
4043 *) Use sizeof in preference to magic numbers.
4044 [Ben Laurie (CHATS)]
4046 *) Avoid filename truncation in cert requests.
4047 [Ben Laurie (CHATS)]
4049 *) Add assertions to check for (supposedly impossible) buffer
4051 [Ben Laurie (CHATS)]
4053 *) Don't cache truncated DNS entries in the local cache (this could
4054 potentially lead to a spoofing attack).
4055 [Ben Laurie (CHATS)]
4057 *) Fix various buffers to be large enough for hex/decimal
4058 representations in a platform independent manner.
4059 [Ben Laurie (CHATS)]
4061 *) Add CRYPTO_realloc_clean() to avoid information leakage when
4062 resizing buffers containing secrets, and use where appropriate.
4063 [Ben Laurie (CHATS)]
4065 *) Add BIO_indent() to avoid much slightly worrying code to do
4067 [Ben Laurie (CHATS)]
4069 *) Convert sprintf()/BIO_puts() to BIO_printf().
4070 [Ben Laurie (CHATS)]
4072 *) buffer_gets() could terminate with the buffer only half
4074 [Ben Laurie (CHATS)]
4076 *) Add assertions to prevent user-supplied crypto functions from
4077 overflowing internal buffers by having large block sizes, etc.
4078 [Ben Laurie (CHATS)]
4080 *) New OPENSSL_assert() macro (similar to assert(), but enabled
4082 [Ben Laurie (CHATS)]
4084 *) Eliminate unused copy of key in RC4.
4085 [Ben Laurie (CHATS)]
4087 *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
4088 [Ben Laurie (CHATS)]
4090 *) Fix off-by-one error in EGD path.
4091 [Ben Laurie (CHATS)]
4093 *) If RANDFILE path is too long, ignore instead of truncating.
4094 [Ben Laurie (CHATS)]
4096 *) Eliminate unused and incorrectly sized X.509 structure
4098 [Ben Laurie (CHATS)]
4100 *) Eliminate unused and dangerous function knumber().
4101 [Ben Laurie (CHATS)]
4103 *) Eliminate unused and dangerous structure, KSSL_ERR.
4104 [Ben Laurie (CHATS)]
4106 *) Protect against overlong session ID context length in an encoded
4107 session object. Since these are local, this does not appear to be
4109 [Ben Laurie (CHATS)]
4111 *) Change from security patch (see 0.9.6e below) that did not affect
4112 the 0.9.6 release series:
4114 Remote buffer overflow in SSL3 protocol - an attacker could
4115 supply an oversized master key in Kerberos-enabled versions.
4117 [Ben Laurie (CHATS)]
4119 *) Change the SSL kerb5 codes to match RFC 2712.
4122 *) Make -nameopt work fully for req and add -reqopt switch.
4123 [Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]
4125 *) The "block size" for block ciphers in CFB and OFB mode should be 1.
4126 [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]
4128 *) Make sure tests can be performed even if the corresponding algorithms
4129 have been removed entirely. This was also the last step to make
4130 OpenSSL compilable with DJGPP under all reasonable conditions.
4131 [Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
4133 *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
4134 to allow version independent disabling of normally unselected ciphers,
4135 which may be activated as a side-effect of selecting a single cipher.
4137 (E.g., cipher list string "RSA" enables ciphersuites that are left
4138 out of "ALL" because they do not provide symmetric encryption.
4139 "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
4140 [Lutz Jaenicke, Bodo Moeller]
4142 *) Add appropriate support for separate platform-dependent build
4143 directories. The recommended way to make a platform-dependent
4144 build directory is the following (tested on Linux), maybe with
4147 # Place yourself outside of the OpenSSL source tree. In
4148 # this example, the environment variable OPENSSL_SOURCE
4149 # is assumed to contain the absolute OpenSSL source directory.
4150 mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
4151 cd objtree/"`uname -s`-`uname -r`-`uname -m`"
4152 (cd $OPENSSL_SOURCE; find . -type f) | while read F; do
4153 mkdir -p `dirname $F`
4154 ln -s $OPENSSL_SOURCE/$F $F
4157 To be absolutely sure not to disturb the source tree, a "make clean"
4158 is a good thing. If it isn't successfull, don't worry about it,
4159 it probably means the source directory is very clean.
4162 *) Make sure any ENGINE control commands make local copies of string
4163 pointers passed to them whenever necessary. Otherwise it is possible
4164 the caller may have overwritten (or deallocated) the original string
4165 data when a later ENGINE operation tries to use the stored values.
4166 [Götz Babin-Ebell <babinebell@trustcenter.de>]
4168 *) Improve diagnostics in file reading and command-line digests.
4169 [Ben Laurie aided and abetted by Solar Designer <solar@openwall.com>]
4171 *) Add AES modes CFB and OFB to the object database. Correct an
4172 error in AES-CFB decryption.
4175 *) Remove most calls to EVP_CIPHER_CTX_cleanup() in evp_enc.c, this
4176 allows existing EVP_CIPHER_CTX structures to be reused after
4177 calling EVP_*Final(). This behaviour is used by encryption
4178 BIOs and some applications. This has the side effect that
4179 applications must explicitly clean up cipher contexts with
4180 EVP_CIPHER_CTX_cleanup() or they will leak memory.
4183 *) Check the values of dna and dnb in bn_mul_recursive before calling
4184 bn_mul_comba (a non zero value means the a or b arrays do not contain
4185 n2 elements) and fallback to bn_mul_normal if either is not zero.
4188 *) Fix escaping of non-ASCII characters when using the -subj option
4189 of the "openssl req" command line tool. (Robert Joop <joop@fokus.gmd.de>)
4192 *) Make object definitions compliant to LDAP (RFC2256): SN is the short
4193 form for "surname", serialNumber has no short form.
4194 Use "mail" as the short name for "rfc822Mailbox" according to RFC2798;
4195 therefore remove "mail" short name for "internet 7".
4196 The OID for unique identifiers in X509 certificates is
4197 x500UniqueIdentifier, not uniqueIdentifier.
4198 Some more OID additions. (Michael Bell <michael.bell@rz.hu-berlin.de>)
4201 *) Add an "init" command to the ENGINE config module and auto initialize
4202 ENGINEs. Without any "init" command the ENGINE will be initialized
4203 after all ctrl commands have been executed on it. If init=1 the
4204 ENGINE is initailized at that point (ctrls before that point are run
4205 on the uninitialized ENGINE and after on the initialized one). If
4206 init=0 then the ENGINE will not be iniatialized at all.
4209 *) Fix the 'app_verify_callback' interface so that the user-defined
4210 argument is actually passed to the callback: In the
4211 SSL_CTX_set_cert_verify_callback() prototype, the callback
4212 declaration has been changed from
4215 int (*cb)(X509_STORE_CTX *,void *);
4216 in ssl_verify_cert_chain (ssl/ssl_cert.c), the call
4217 i=s->ctx->app_verify_callback(&ctx)
4218 has been changed into
4219 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg).
4221 To update applications using SSL_CTX_set_cert_verify_callback(),
4222 a dummy argument can be added to their callback functions.
4223 [D. K. Smetters <smetters@parc.xerox.com>]
4225 *) Added the '4758cca' ENGINE to support IBM 4758 cards.
4226 [Maurice Gittens <maurice@gittens.nl>, touchups by Geoff Thorpe]
4228 *) Add and OPENSSL_LOAD_CONF define which will cause
4229 OpenSSL_add_all_algorithms() to load the openssl.cnf config file.
4230 This allows older applications to transparently support certain
4231 OpenSSL features: such as crypto acceleration and dynamic ENGINE loading.
4232 Two new functions OPENSSL_add_all_algorithms_noconf() which will never
4233 load the config file and OPENSSL_add_all_algorithms_conf() which will
4234 always load it have also been added.
4237 *) Add the OFB, CFB and CTR (all with 128 bit feedback) to AES.
4238 Adjust NIDs and EVP layer.
4239 [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]
4241 *) Config modules support in openssl utility.
4243 Most commands now load modules from the config file,
4244 though in a few (such as version) this isn't done
4245 because it couldn't be used for anything.
4247 In the case of ca and req the config file used is
4248 the same as the utility itself: that is the -config
4249 command line option can be used to specify an
4253 *) Move default behaviour from OPENSSL_config(). If appname is NULL
4254 use "openssl_conf" if filename is NULL use default openssl config file.
4257 *) Add an argument to OPENSSL_config() to allow the use of an alternative
4258 config section name. Add a new flag to tolerate a missing config file
4259 and move code to CONF_modules_load_file().
4262 *) Support for crypto accelerator cards from Accelerated Encryption
4263 Processing, www.aep.ie. (Use engine 'aep')
4264 The support was copied from 0.9.6c [engine] and adapted/corrected
4265 to work with the new engine framework.
4266 [AEP Inc. and Richard Levitte]
4268 *) Support for SureWare crypto accelerator cards from Baltimore
4269 Technologies. (Use engine 'sureware')
4270 The support was copied from 0.9.6c [engine] and adapted
4271 to work with the new engine framework.
4274 *) Have the CHIL engine fork-safe (a
projects / openssl.git / blob