5 Changes between 1.0.1 and 1.1.0 [xx XXX xxxx]
7 *) Update and tidy signature algorithm extension processing. Work out
8 shared signature algorithms based on preferences and peer algorithms
9 and print them out in s_client and s_server. Abort handshake if no
10 shared signature algorithms.
13 *) Add new functions to allow customised supported signature algorithms
14 for SSL and SSL_CTX structures. Add options to s_client and s_server
18 *) New function SSL_certs_clear() to delete all references to certificates
19 from an SSL structure. Before this once a certificate had been added
20 it couldn't be removed.
23 *) Initial SSL tracing code. This parses out SSL/TLS records using the
24 message callback and prints the results. Needs compile time option
25 "enable-ssl-trace". New options to s_client and s_server to enable
29 *) New functions to retrieve certificate signature and signature
33 *) Print out deprecated issuer and subject unique ID fields in
38 [Emilia Kasper, Adam Langley, Ben Laurie (Google)]
40 *) Support for automatic EC temporary key parameter selection. If enabled
41 the most preferred EC parameters are automatically used instead of
42 hardcoded fixed parameters. Now a server just has to call:
43 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
44 support ECDH and use the most appropriate parameters.
47 *) Enhance and tidy EC curve and point format TLS extension code. Use
48 static structures instead of allocation if default values are used.
49 New ctrls to set curves we wish to support and to retrieve shared curves.
50 Print out shared curves in s_server. New options to s_server and s_client
51 to set list of supported curves.
54 *) New ctrls to retrieve supported signature algorithms and
55 supported curve values as an array of NIDs. Extend openssl utility
56 to print out received values.
59 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
60 between NIDs and the more common NIST names such as "P-256". Enhance
61 ecparam utility and ECC method to recognise the NIST names for curves.
64 *) Enhance SSL/TLS certificate chain handling to support different
65 chains for each certificate instead of one chain in the parent SSL_CTX.
68 *) Support for fixed DH ciphersuite client authentication: where both
69 server and client use DH certificates with common parameters.
72 *) Support for fixed DH ciphersuites: those requiring DH server
76 *) Transparently support X9.42 DH parameters when calling
77 PEM_read_bio_DHparameters. This means existing applications can handle
78 the new parameter format automatically.
81 *) Initial experimental support for X9.42 DH parameter format: mainly
82 to support use of 'q' parameter for RFC5114 parameters.
85 *) Add DH parameters from RFC5114 including test data to dhtest.
88 *) Update fips_test_suite to support multiple command line options. New
89 test to induce all self test errors in sequence and check expected
93 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
94 sign or verify all in one operation.
97 *) Add fips_algvs: a multicall fips utility incorporaing all the algorithm
98 test programs and fips_test_suite. Includes functionality to parse
99 the minimal script output of fipsalgest.pl directly.
102 *) Add authorisation parameter to FIPS_module_mode_set().
105 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
108 *) Use separate DRBG fields for internal and external flags. New function
109 FIPS_drbg_health_check() to perform on demand health checking. Add
110 generation tests to fips_test_suite with reduced health check interval to
111 demonstrate periodic health checking. Add "nodh" option to
112 fips_test_suite to skip very slow DH test.
115 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
119 *) More extensive health check for DRBG checking many more failure modes.
120 New function FIPS_selftest_drbg_all() to handle every possible DRBG
121 combination: call this in fips_test_suite.
124 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
125 and POST to handle Dual EC cases.
128 *) Add support for canonical generation of DSA parameter 'g'. See
131 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
132 POST to handle HMAC cases.
135 *) Add functions FIPS_module_version() and FIPS_module_version_text()
136 to return numberical and string versions of the FIPS module number.
139 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
140 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implmeneted
141 outside the validated module in the FIPS capable OpenSSL.
144 *) Minor change to DRBG entropy callback semantics. In some cases
145 there is no mutiple of the block length between min_len and
146 max_len. Allow the callback to return more than max_len bytes
147 of entropy but discard any extra: it is the callback's responsibility
148 to ensure that the extra data discarded does not impact the
149 requested amount of entropy.
152 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
153 information in FIPS186-3, SP800-57 and SP800-131A.
156 *) CCM support via EVP. Interface is very similar to GCM case except we
157 must supply all data in one chunk (i.e. no update, final) and the
158 message length must be supplied if AAD is used. Add algorithm test
162 *) Initial version of POST overhaul. Add POST callback to allow the status
163 of POST to be monitored and/or failures induced. Modify fips_test_suite
164 to use callback. Always run all selftests even if one fails.
167 *) XTS support including algorithm test driver in the fips_gcmtest program.
168 Note: this does increase the maximum key length from 32 to 64 bytes but
169 there should be no binary compatibility issues as existing applications
170 will never use XTS mode.
173 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
174 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
175 performs algorithm blocking for unapproved PRNG types. Also do not
176 set PRNG type in FIPS_mode_set(): leave this to the application.
177 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
178 the standard OpenSSL PRNG: set additional data to a date time vector.
181 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
182 This shouldn't present any incompatibility problems because applications
183 shouldn't be using these directly and any that are will need to rethink
184 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
187 *) Extensive self tests and health checking required by SP800-90 DRBG.
188 Remove strength parameter from FIPS_drbg_instantiate and always
189 instantiate at maximum supported strength.
192 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
195 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
198 *) New function DH_compute_key_padded() to compute a DH key and pad with
199 leading zeroes if needed: this complies with SP800-56A et al.
202 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
203 anything, incomplete, subject to change and largely untested at present.
206 *) Modify fipscanisteronly build option to only build the necessary object
207 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
210 *) Add experimental option FIPSSYMS to give all symbols in
211 fipscanister.o and FIPS or fips prefix. This will avoid
212 conflicts with future versions of OpenSSL. Add perl script
213 util/fipsas.pl to preprocess assembly language source files
214 and rename any affected symbols.
217 *) Add selftest checks and algorithm block of non-fips algorithms in
218 FIPS mode. Remove DES2 from selftests.
221 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
222 return internal method without any ENGINE dependencies. Add new
223 tiny fips sign and verify functions.
226 *) New build option no-ec2m to disable characteristic 2 code.
229 *) New build option "fipscanisteronly". This only builds fipscanister.o
230 and (currently) associated fips utilities. Uses the file Makefile.fips
231 instead of Makefile.org as the prototype.
234 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
235 Update fips_gcmtest to use IV generator.
238 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
239 setting output buffer to NULL. The *Final function must be
240 called although it will not retrieve any additional data. The tag
241 can be set or retrieved with a ctrl. The IV length is by default 12
242 bytes (96 bits) but can be set to an alternative value. If the IV
243 length exceeds the maximum IV length (currently 16 bytes) it cannot be
247 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
248 underlying do_cipher function handles all cipher semantics itself
249 including padding and finalisation. This is useful if (for example)
250 an ENGINE cipher handles block padding itself. The behaviour of
251 do_cipher is subtly changed if this flag is set: the return value
252 is the number of characters written to the output buffer (zero is
253 no longer an error code) or a negative error code. Also if the
254 input buffer is NULL and length 0 finalisation should be performed.
257 *) If a candidate issuer certificate is already part of the constructed
258 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
261 *) Improve forward-security support: add functions
263 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
264 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
266 for use by SSL/TLS servers; the callback function will be called whenever a
267 new session is created, and gets to decide whether the session may be
268 cached to make it resumable (return 0) or not (return 1). (As by the
269 SSL/TLS protocol specifications, the session_id sent by the server will be
270 empty to indicate that the session is not resumable; also, the server will
271 not generate RFC 4507 (RFC 5077) session tickets.)
273 A simple reasonable callback implementation is to return is_forward_secure.
274 This parameter will be set to 1 or 0 depending on the ciphersuite selected
275 by the SSL/TLS server library, indicating whether it can provide forward
277 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
279 *) New function OPENSSL_gmtime_diff to find the difference in days
280 and seconds between two tm structures. This will be used to provide
281 additional functionality for ASN1_TIME.
284 *) Add -trusted_first option which attempts to find certificates in the
285 trusted store even if an untrusted chain is also supplied.
288 *) Initial experimental support for explicitly trusted non-root CAs.
289 OpenSSL still tries to build a complete chain to a root but if an
290 intermediate CA has a trust setting included that is used. The first
291 setting is used: whether to trust or reject.
294 *) New -verify_name option in command line utilities to set verification
298 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
299 Add CMAC pkey methods.
302 *) Experimental regnegotiation in s_server -www mode. If the client
303 browses /reneg connection is renegotiated. If /renegcert it is
304 renegotiated requesting a certificate.
307 *) Add an "external" session cache for debugging purposes to s_server. This
308 should help trace issues which normally are only apparent in deployed
309 multi-process servers.
312 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
313 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
314 BIO_set_cipher() and some obscure PEM functions were changed so they
315 can now return an error. The RAND changes required a change to the
316 RAND_METHOD structure.
319 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
320 a gcc attribute to warn if the result of a function is ignored. This
321 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
322 whose return value is often ignored.
325 Changes between 1.0.1c and 1.0.1d [xx XXX xxxx]
327 *) Fix possible deadlock when decoding public keys.
330 *) Don't use TLS 1.0 record version number in initial client hello
334 Changes between 1.0.1b and 1.0.1c [10 May 2012]
336 *) Sanity check record length before skipping explicit IV in TLS
337 1.2, 1.1 and DTLS to avoid DoS attack.
339 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
340 fuzzing as a service testing platform.
344 *) Initialise tkeylen properly when encrypting CMS messages.
345 Thanks to Solar Designer of Openwall for reporting this issue.
348 *) In FIPS mode don't try to use composite ciphers as they are not
352 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
354 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
355 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
356 mean any application compiled against OpenSSL 1.0.0 headers setting
357 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
358 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
359 0x10000000L Any application which was previously compiled against
360 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
361 will need to be recompiled as a result. Letting be results in
362 inability to disable specifically TLS 1.1 and in client context,
363 in unlike event, limit maximum offered version to TLS 1.0 [see below].
366 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
367 disable just protocol X, but all protocols above X *if* there are
368 protocols *below* X still enabled. In more practical terms it means
369 that if application wants to disable TLS1.0 in favor of TLS1.1 and
370 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
371 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
375 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
377 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
378 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
379 in CRYPTO_realloc_clean.
381 Thanks to Tavis Ormandy, Google Security Team, for discovering this
382 issue and to Adam Langley <agl@chromium.org> for fixing it.
384 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
386 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
389 *) Workarounds for some broken servers that "hang" if a client hello
390 record length exceeds 255 bytes:
392 1. Do not use record version number > TLS 1.0 in initial client
393 hello: some (but not all) hanging servers will now work.
394 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
395 the number of ciphers sent in the client hello. This should be
396 set to an even number, such as 50, for example by passing:
397 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
398 Most broken servers should now work.
399 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
400 TLS 1.2 client support entirely.
403 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
406 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
408 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
409 STRING form instead of a DigestInfo.
412 *) The format used for MDC2 RSA signatures is inconsistent between EVP
413 and the RSA_sign/RSA_verify functions. This was made more apparent when
414 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
415 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
416 the correct format in RSA_verify so both forms transparently work.
419 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
420 STRING form instead of a DigestInfo.
423 *) Some servers which support TLS 1.0 can choke if we initially indicate
424 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
425 encrypted premaster secret. As a workaround use the maximum pemitted
426 client version in client hello, this should keep such servers happy
427 and still work with previous versions of OpenSSL.
430 *) Add support for TLS/DTLS heartbeats.
431 [Robin Seggelmann <seggelmann@fh-muenster.de>]
433 *) Add support for SCTP.
434 [Robin Seggelmann <seggelmann@fh-muenster.de>]
436 *) Improved PRNG seeding for VOS.
437 [Paul Green <Paul.Green@stratus.com>]
439 *) Extensive assembler packs updates, most notably:
441 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
442 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
443 - x86_64: bit-sliced AES implementation;
444 - ARM: NEON support, contemporary platforms optimizations;
445 - s390x: z196 support;
446 - *: GHASH and GF(2^m) multiplication implementations;
450 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
451 (removal of unnecessary code)
452 [Peter Sylvester <peter.sylvester@edelweb.fr>]
454 *) Add TLS key material exporter from RFC 5705.
457 *) Add DTLS-SRTP negotiation from RFC 5764.
460 *) Add Next Protocol Negotiation,
461 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
462 disabled with a no-npn flag to config or Configure. Code donated
464 [Adam Langley <agl@google.com> and Ben Laurie]
466 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
467 NIST-P256, NIST-P521, with constant-time single point multiplication on
468 typical inputs. Compiler support for the nonstandard type __uint128_t is
469 required to use this (present in gcc 4.4 and later, for 64-bit builds).
470 Code made available under Apache License version 2.0.
472 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
473 line to include this in your build of OpenSSL, and run "make depend" (or
474 "make update"). This enables the following EC_METHODs:
476 EC_GFp_nistp224_method()
477 EC_GFp_nistp256_method()
478 EC_GFp_nistp521_method()
480 EC_GROUP_new_by_curve_name() will automatically use these (while
481 EC_GROUP_new_curve_GFp() currently prefers the more flexible
483 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
485 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
486 all platforms. Move ssize_t definition from e_os.h to the public
487 header file e_os2.h as it now appears in public header file cms.h
490 *) New -sigopt option to the ca, req and x509 utilities. Additional
491 signature parameters can be passed using this option and in
495 *) Add RSA PSS signing function. This will generate and set the
496 appropriate AlgorithmIdentifiers for PSS based on those in the
497 corresponding EVP_MD_CTX structure. No application support yet.
500 *) Support for companion algorithm specific ASN1 signing routines.
501 New function ASN1_item_sign_ctx() signs a pre-initialised
502 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
503 the appropriate parameters.
506 *) Add new algorithm specific ASN1 verification initialisation function
507 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
508 handling will be the same no matter what EVP_PKEY_METHOD is used.
509 Add a PSS handler to support verification of PSS signatures: checked
510 against a number of sample certificates.
513 *) Add signature printing for PSS. Add PSS OIDs.
514 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
516 *) Add algorithm specific signature printing. An individual ASN1 method
517 can now print out signatures instead of the standard hex dump.
519 More complex signatures (e.g. PSS) can print out more meaningful
520 information. Include DSA version that prints out the signature
524 *) Password based recipient info support for CMS library: implementing
528 *) Split password based encryption into PBES2 and PBKDF2 functions. This
529 neatly separates the code into cipher and PBE sections and is required
530 for some algorithms that split PBES2 into separate pieces (such as
534 *) Session-handling fixes:
535 - Fix handling of connections that are resuming with a session ID,
536 but also support Session Tickets.
537 - Fix a bug that suppressed issuing of a new ticket if the client
538 presented a ticket with an expired session.
539 - Try to set the ticket lifetime hint to something reasonable.
540 - Make tickets shorter by excluding irrelevant information.
541 - On the client side, don't ignore renewed tickets.
542 [Adam Langley, Bodo Moeller (Google)]
544 *) Fix PSK session representation.
547 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
549 This work was sponsored by Intel.
552 *) Add GCM support to TLS library. Some custom code is needed to split
553 the IV between the fixed (from PRF) and explicit (from TLS record)
554 portions. This adds all GCM ciphersuites supported by RFC5288 and
555 RFC5289. Generalise some AES* cipherstrings to inlclude GCM and
556 add a special AESGCM string for GCM only.
559 *) Expand range of ctrls for AES GCM. Permit setting invocation
560 field on decrypt and retrieval of invocation field only on encrypt.
563 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
564 As required by RFC5289 these ciphersuites cannot be used if for
565 versions of TLS earlier than 1.2.
568 *) For FIPS capable OpenSSL interpret a NULL default public key method
569 as unset and return the appopriate default but do *not* set the default.
570 This means we can return the appopriate method in applications that
571 swicth between FIPS and non-FIPS modes.
574 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
575 ENGINE is used then we cannot handle that in the FIPS module so we
576 keep original code iff non-FIPS operations are allowed.
579 *) Add -attime option to openssl utilities.
580 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
582 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
585 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
586 FIPS EC methods unconditionally for now.
589 *) New build option no-ec2m to disable characteristic 2 code.
592 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
593 all cases can be covered as some introduce binary incompatibilities.
596 *) Redirect RSA operations to FIPS module including keygen,
597 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
600 *) Add similar low level API blocking to ciphers.
603 *) Low level digest APIs are not approved in FIPS mode: any attempt
604 to use these will cause a fatal error. Applications that *really* want
605 to use them can use the private_* version instead.
608 *) Redirect cipher operations to FIPS module for FIPS builds.
611 *) Redirect digest operations to FIPS module for FIPS builds.
614 *) Update build system to add "fips" flag which will link in fipscanister.o
615 for static and shared library builds embedding a signature if needed.
618 *) Output TLS supported curves in preference order instead of numerical
619 order. This is currently hardcoded for the highest order curves first.
620 This should be configurable so applications can judge speed vs strength.
623 *) Add TLS v1.2 server support for client authentication.
626 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
630 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
631 FIPS modules versions.
634 *) Add TLS v1.2 client side support for client authentication. Keep cache
635 of handshake records longer as we don't know the hash algorithm to use
636 until after the certificate request message is received.
639 *) Initial TLS v1.2 client support. Add a default signature algorithms
640 extension including all the algorithms we support. Parse new signature
641 format in client key exchange. Relax some ECC signing restrictions for
642 TLS v1.2 as indicated in RFC5246.
645 *) Add server support for TLS v1.2 signature algorithms extension. Switch
646 to new signature format when needed using client digest preference.
647 All server ciphersuites should now work correctly in TLS v1.2. No client
648 support yet and no support for client certificates.
651 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
652 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
653 ciphersuites. At present only RSA key exchange ciphersuites work with
654 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
655 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
656 and version checking.
659 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
660 with this defined it will not be affected by any changes to ssl internal
661 structures. Add several utility functions to allow openssl application
662 to work with OPENSSL_NO_SSL_INTERN defined.
666 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
668 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
671 *) Permit abbreviated handshakes when renegotiating using the function
672 SSL_renegotiate_abbreviated().
673 [Robin Seggelmann <seggelmann@fh-muenster.de>]
675 *) Add call to ENGINE_register_all_complete() to
676 ENGINE_load_builtin_engines(), so some implementations get used
677 automatically instead of needing explicit application support.
680 *) Add support for TLS key exporter as described in RFC5705.
681 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
683 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
684 a few changes are required:
686 Add SSL_OP_NO_TLSv1_1 flag.
688 Update version checking logic to handle version 1.1.
689 Add explicit IV handling (ported from DTLS code).
690 Add command line options to s_client/s_server.
693 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
695 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
696 in CMS and PKCS7 code. When RSA decryption fails use a random key for
697 content decryption and always return the same error. Note: this attack
698 needs on average 2^20 messages so it only affects automated senders. The
699 old behaviour can be reenabled in the CMS code by setting the
700 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
701 an MMA defence is not necessary.
702 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
703 this issue. (CVE-2012-0884)
706 *) Fix CVE-2011-4619: make sure we really are receiving a
707 client hello before rejecting multiple SGC restarts. Thanks to
708 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
711 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
713 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
714 Thanks to Antonio Martin, Enterprise Secure Access Research and
715 Development, Cisco Systems, Inc. for discovering this bug and
716 preparing a fix. (CVE-2012-0050)
719 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
721 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
722 of the Vaudenay padding oracle attack on CBC mode encryption
723 which enables an efficient plaintext recovery attack against
724 the OpenSSL implementation of DTLS. Their attack exploits timing
725 differences arising during decryption processing. A research
726 paper describing this attack can be found at:
727 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
728 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
729 Security Group at Royal Holloway, University of London
730 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
731 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
732 for preparing the fix. (CVE-2011-4108)
733 [Robin Seggelmann, Michael Tuexen]
735 *) Clear bytes used for block padding of SSL 3.0 records.
737 [Adam Langley (Google)]
739 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
740 Kadianakis <desnacked@gmail.com> for discovering this issue and
741 Adam Langley for preparing the fix. (CVE-2011-4619)
742 [Adam Langley (Google)]
744 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
745 [Andrey Kulikov <amdeich@gmail.com>]
747 *) Prevent malformed RFC3779 data triggering an assertion failure.
748 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
749 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
750 [Rob Austein <sra@hactrn.net>]
752 *) Improved PRNG seeding for VOS.
753 [Paul Green <Paul.Green@stratus.com>]
755 *) Fix ssl_ciph.c set-up race.
756 [Adam Langley (Google)]
758 *) Fix spurious failures in ecdsatest.c.
759 [Emilia Käsper (Google)]
761 *) Fix the BIO_f_buffer() implementation (which was mixing different
762 interpretations of the '..._len' fields).
763 [Adam Langley (Google)]
765 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
766 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
767 threads won't reuse the same blinding coefficients.
769 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
770 lock to call BN_BLINDING_invert_ex, and avoids one use of
771 BN_BLINDING_update for each BN_BLINDING structure (previously,
772 the last update always remained unused).
773 [Emilia Käsper (Google)]
775 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
776 [Bob Buckholz (Google)]
778 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
780 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
781 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
782 [Kaspar Brand <ossl@velox.ch>]
784 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
785 for multi-threaded use of ECDH. (CVE-2011-3210)
786 [Adam Langley (Google)]
788 *) Fix x509_name_ex_d2i memory leak on bad inputs.
791 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
792 signature public key algorithm by using OID xref utilities instead.
793 Before this you could only use some ECC ciphersuites with SHA1 only.
796 *) Add protection against ECDSA timing attacks as mentioned in the paper
797 by Billy Bob Brumley and Nicola Tuveri, see:
799 http://eprint.iacr.org/2011/232.pdf
801 [Billy Bob Brumley and Nicola Tuveri]
803 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
805 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
806 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
808 *) Fix bug in string printing code: if *any* escaping is enabled we must
809 escape the escape character (backslash) or the resulting string is
813 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
815 *) Disable code workaround for ancient and obsolete Netscape browsers
816 and servers: an attacker can use it in a ciphersuite downgrade attack.
817 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
820 *) Fixed J-PAKE implementation error, originally discovered by
821 Sebastien Martini, further info and confirmation from Stefan
822 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
825 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
827 *) Fix extension code to avoid race conditions which can result in a buffer
828 overrun vulnerability: resumed sessions must not be modified as they can
829 be shared by multiple threads. CVE-2010-3864
832 *) Fix WIN32 build system to correctly link an ENGINE directory into
836 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
838 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
840 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
842 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
844 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
845 context. The operation can be customised via the ctrl mechanism in
846 case ENGINEs want to include additional functionality.
849 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
852 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
853 output hashes compatible with older versions of OpenSSL.
854 [Willy Weisz <weisz@vcpc.univie.ac.at>]
856 *) Fix compression algorithm handling: if resuming a session use the
857 compression algorithm of the resumed session instead of determining
858 it from client hello again. Don't allow server to change algorithm.
861 *) Add load_crls() function to apps tidying load_certs() too. Add option
862 to verify utility to allow additional CRLs to be included.
865 *) Update OCSP request code to permit adding custom headers to the request:
866 some responders need this.
869 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
871 [Julia Lawall <julia@diku.dk>]
873 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
874 needlessly dereferenced structures, used obsolete functions and
875 didn't handle all updated verify codes correctly.
878 *) Disable MD2 in the default configuration.
881 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
882 indicate the initial BIO being pushed or popped. This makes it possible
883 to determine whether the BIO is the one explicitly called or as a result
884 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
885 it handles reference counts correctly and doesn't zero out the I/O bio
886 when it is not being explicitly popped. WARNING: applications which
887 included workarounds for the old buggy behaviour will need to be modified
888 or they could free up already freed BIOs.
891 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
892 renaming to all platforms (within the 0.9.8 branch, this was
893 done conditionally on Netware platforms to avoid a name clash).
894 [Guenter <lists@gknw.net>]
896 *) Add ECDHE and PSK support to DTLS.
897 [Michael Tuexen <tuexen@fh-muenster.de>]
899 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
903 *) Add "missing" function EVP_MD_flags() (without this the only way to
904 retrieve a digest flags is by accessing the structure directly. Update
905 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
906 or cipher is registered as in the "from" argument. Print out all
907 registered digests in the dgst usage message instead of manually
908 attempting to work them out.
911 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
912 this allows the use of compression and extensions. Change default cipher
913 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
914 by default unless an application cipher string requests it.
917 *) Alter match criteria in PKCS12_parse(). It used to try to use local
918 key ids to find matching certificates and keys but some PKCS#12 files
919 don't follow the (somewhat unwritten) rules and this strategy fails.
920 Now just gather all certificates together and the first private key
921 then look for the first certificate that matches the key.
924 *) Support use of registered digest and cipher names for dgst and cipher
925 commands instead of having to add each one as a special case. So now
932 openssl dgst -sha256 foo
934 and this works for ENGINE based algorithms too.
938 *) Update Gost ENGINE to support parameter files.
939 [Victor B. Wagner <vitus@cryptocom.ru>]
941 *) Support GeneralizedTime in ca utility.
942 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
944 *) Enhance the hash format used for certificate directory links. The new
945 form uses the canonical encoding (meaning equivalent names will work
946 even if they aren't identical) and uses SHA1 instead of MD5. This form
947 is incompatible with the older format and as a result c_rehash should
948 be used to rebuild symbolic links.
951 *) Make PKCS#8 the default write format for private keys, replacing the
952 traditional format. This form is standardised, more secure and doesn't
953 include an implicit MD5 dependency.
956 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
957 committed to OpenSSL should pass this lot as a minimum.
960 *) Add session ticket override functionality for use by EAP-FAST.
961 [Jouni Malinen <j@w1.fi>]
963 *) Modify HMAC functions to return a value. Since these can be implemented
964 in an ENGINE errors can occur.
967 *) Type-checked OBJ_bsearch_ex.
970 *) Type-checked OBJ_bsearch. Also some constification necessitated
971 by type-checking. Still to come: TXT_DB, bsearch(?),
972 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
976 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
977 seconds to a tm structure directly, instead of going through OS
978 specific date routines. This avoids any issues with OS routines such
979 as the year 2038 bug. New *_adj() functions for ASN1 time structures
980 and X509_time_adj_ex() to cover the extended range. The existing
981 X509_time_adj() is still usable and will no longer have any date issues.
984 *) Delta CRL support. New use deltas option which will attempt to locate
985 and search any appropriate delta CRLs available.
987 This work was sponsored by Google.
990 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
991 code and add additional score elements. Validate alternate CRL paths
992 as part of the CRL checking and indicate a new error "CRL path validation
993 error" in this case. Applications wanting additional details can use
994 the verify callback and check the new "parent" field. If this is not
995 NULL CRL path validation is taking place. Existing applications wont
996 see this because it requires extended CRL support which is off by
999 This work was sponsored by Google.
1002 *) Support for freshest CRL extension.
1004 This work was sponsored by Google.
1007 *) Initial indirect CRL support. Currently only supported in the CRLs
1008 passed directly and not via lookup. Process certificate issuer
1009 CRL entry extension and lookup CRL entries by bother issuer name
1010 and serial number. Check and process CRL issuer entry in IDP extension.
1012 This work was sponsored by Google.
1015 *) Add support for distinct certificate and CRL paths. The CRL issuer
1016 certificate is validated separately in this case. Only enabled if
1017 an extended CRL support flag is set: this flag will enable additional
1018 CRL functionality in future.
1020 This work was sponsored by Google.
1023 *) Add support for policy mappings extension.
1025 This work was sponsored by Google.
1028 *) Fixes to pathlength constraint, self issued certificate handling,
1029 policy processing to align with RFC3280 and PKITS tests.
1031 This work was sponsored by Google.
1034 *) Support for name constraints certificate extension. DN, email, DNS
1035 and URI types are currently supported.
1037 This work was sponsored by Google.
1040 *) To cater for systems that provide a pointer-based thread ID rather
1041 than numeric, deprecate the current numeric thread ID mechanism and
1042 replace it with a structure and associated callback type. This
1043 mechanism allows a numeric "hash" to be extracted from a thread ID in
1044 either case, and on platforms where pointers are larger than 'long',
1045 mixing is done to help ensure the numeric 'hash' is usable even if it
1046 can't be guaranteed unique. The default mechanism is to use "&errno"
1047 as a pointer-based thread ID to distinguish between threads.
1049 Applications that want to provide their own thread IDs should now use
1050 CRYPTO_THREADID_set_callback() to register a callback that will call
1051 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
1053 Note that ERR_remove_state() is now deprecated, because it is tied
1054 to the assumption that thread IDs are numeric. ERR_remove_state(0)
1055 to free the current thread's error state should be replaced by
1056 ERR_remove_thread_state(NULL).
1058 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
1059 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
1060 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
1061 application was previously providing a numeric thread callback that
1062 was inappropriate for distinguishing threads, then uniqueness might
1063 have been obtained with &errno that happened immediately in the
1064 intermediate development versions of OpenSSL; this is no longer the
1065 case, the numeric thread callback will now override the automatic use
1067 [Geoff Thorpe, with help from Bodo Moeller]
1069 *) Initial support for different CRL issuing certificates. This covers a
1070 simple case where the self issued certificates in the chain exist and
1071 the real CRL issuer is higher in the existing chain.
1073 This work was sponsored by Google.
1076 *) Removed effectively defunct crypto/store from the build.
1079 *) Revamp of STACK to provide stronger type-checking. Still to come:
1080 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
1081 ASN1_STRING, CONF_VALUE.
1084 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
1085 RAM on SSL connections. This option can save about 34k per idle SSL.
1088 *) Revamp of LHASH to provide stronger type-checking. Still to come:
1089 STACK, TXT_DB, bsearch, qsort.
1092 *) Initial support for Cryptographic Message Syntax (aka CMS) based
1093 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
1094 support for data, signedData, compressedData, digestedData and
1095 encryptedData, envelopedData types included. Scripts to check against
1096 RFC4134 examples draft and interop and consistency checks of many
1097 content types and variants.
1100 *) Add options to enc utility to support use of zlib compression BIO.
1103 *) Extend mk1mf to support importing of options and assembly language
1104 files from Configure script, currently only included in VC-WIN32.
1105 The assembly language rules can now optionally generate the source
1106 files from the associated perl scripts.
1109 *) Implement remaining functionality needed to support GOST ciphersuites.
1110 Interop testing has been performed using CryptoPro implementations.
1111 [Victor B. Wagner <vitus@cryptocom.ru>]
1113 *) s390x assembler pack.
1116 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
1120 *) Implement Opaque PRF Input TLS extension as specified in
1121 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
1122 official specification yet and no extension type assignment by
1123 IANA exists, this extension (for now) will have to be explicitly
1124 enabled when building OpenSSL by providing the extension number
1125 to use. For example, specify an option
1127 -DTLSEXT_TYPE_opaque_prf_input=0x9527
1129 to the "config" or "Configure" script to enable the extension,
1130 assuming extension number 0x9527 (which is a completely arbitrary
1131 and unofficial assignment based on the MD5 hash of the Internet
1132 Draft). Note that by doing so, you potentially lose
1133 interoperability with other TLS implementations since these might
1134 be using the same extension number for other purposes.
1136 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
1137 opaque PRF input value to use in the handshake. This will create
1138 an interal copy of the length-'len' string at 'src', and will
1139 return non-zero for success.
1141 To get more control and flexibility, provide a callback function
1144 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
1145 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
1149 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
1152 Callback function 'cb' will be called in handshakes, and is
1153 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
1154 Argument 'arg' is for application purposes (the value as given to
1155 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
1156 be provided to the callback function). The callback function
1157 has to return non-zero to report success: usually 1 to use opaque
1158 PRF input just if possible, or 2 to enforce use of the opaque PRF
1159 input. In the latter case, the library will abort the handshake
1160 if opaque PRF input is not successfully negotiated.
1162 Arguments 'peerinput' and 'len' given to the callback function
1163 will always be NULL and 0 in the case of a client. A server will
1164 see the client's opaque PRF input through these variables if
1165 available (NULL and 0 otherwise). Note that if the server
1166 provides an opaque PRF input, the length must be the same as the
1167 length of the client's opaque PRF input.
1169 Note that the callback function will only be called when creating
1170 a new session (session resumption can resume whatever was
1171 previously negotiated), and will not be called in SSL 2.0
1172 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
1173 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
1174 for applications that need to enforce opaque PRF input.
1178 *) Update ssl code to support digests other than SHA1+MD5 for handshake
1181 [Victor B. Wagner <vitus@cryptocom.ru>]
1183 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1184 RFC4507bis. The encrypted ticket format is an encrypted encoded
1185 SSL_SESSION structure, that way new session features are automatically
1188 If a client application caches session in an SSL_SESSION structure
1189 support is transparent because tickets are now stored in the encoded
1192 The SSL_CTX structure automatically generates keys for ticket
1193 protection in servers so again support should be possible
1194 with no application modification.
1196 If a client or server wishes to disable RFC4507 support then the option
1197 SSL_OP_NO_TICKET can be set.
1199 Add a TLS extension debugging callback to allow the contents of any client
1200 or server extensions to be examined.
1202 This work was sponsored by Google.
1205 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
1206 OpenSSL should now compile cleanly on gcc 4.2
1207 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
1209 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
1210 support including streaming MAC support: this is required for GOST
1211 ciphersuite support.
1212 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
1214 *) Add option -stream to use PKCS#7 streaming in smime utility. New
1215 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
1216 to output in BER and PEM format.
1219 *) Experimental support for use of HMAC via EVP_PKEY interface. This
1220 allows HMAC to be handled via the EVP_DigestSign*() interface. The
1221 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
1222 ENGINE support for HMAC keys which are unextractable. New -mac and
1223 -macopt options to dgst utility.
1226 *) New option -sigopt to dgst utility. Update dgst to use
1227 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
1228 alternative signing paramaters such as X9.31 or PSS in the dgst
1232 *) Change ssl_cipher_apply_rule(), the internal function that does
1233 the work each time a ciphersuite string requests enabling
1234 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
1235 removing ("!foo+bar") a class of ciphersuites: Now it maintains
1236 the order of disabled ciphersuites such that those ciphersuites
1237 that most recently went from enabled to disabled not only stay
1238 in order with respect to each other, but also have higher priority
1239 than other disabled ciphersuites the next time ciphersuites are
1242 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
1243 the same ciphersuites as with "HIGH" alone, but in a specific
1244 order where the PSK ciphersuites come first (since they are the
1245 most recently disabled ciphersuites when "HIGH" is parsed).
1247 Also, change ssl_create_cipher_list() (using this new
1248 funcionality) such that between otherwise identical
1249 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
1253 *) Change ssl_create_cipher_list() so that it automatically
1254 arranges the ciphersuites in reasonable order before starting
1255 to process the rule string. Thus, the definition for "DEFAULT"
1256 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
1257 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
1258 This makes it much easier to arrive at a reasonable default order
1259 in applications for which anonymous ciphers are OK (meaning
1260 that you can't actually use DEFAULT).
1261 [Bodo Moeller; suggested by Victor Duchovni]
1263 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
1264 processing) into multiple integers instead of setting
1265 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
1266 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
1267 (These masks as well as the individual bit definitions are hidden
1268 away into the non-exported interface ssl/ssl_locl.h, so this
1269 change to the definition of the SSL_CIPHER structure shouldn't
1270 affect applications.) This give us more bits for each of these
1271 categories, so there is no longer a need to coagulate AES128 and
1272 AES256 into a single algorithm bit, and to coagulate Camellia128
1273 and Camellia256 into a single algorithm bit, which has led to all
1276 Thus, among other things, the kludge introduced in 0.9.7m and
1277 0.9.8e for masking out AES256 independently of AES128 or masking
1278 out Camellia256 independently of AES256 is not needed here in 0.9.9.
1280 With the change, we also introduce new ciphersuite aliases that
1281 so far were missing: "AES128", "AES256", "CAMELLIA128", and
1285 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
1286 Use the leftmost N bytes of the signature input if the input is
1287 larger than the prime q (with N being the size in bytes of q).
1290 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
1291 it yet and it is largely untested.
1294 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
1297 *) Initial incomplete changes to avoid need for function casts in OpenSSL
1298 some compilers (gcc 4.2 and later) reject their use. Safestack is
1299 reimplemented. Update ASN1 to avoid use of legacy functions.
1302 *) Win32/64 targets are linked with Winsock2.
1305 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
1306 to external functions. This can be used to increase CRL handling
1307 efficiency especially when CRLs are very large by (for example) storing
1308 the CRL revoked certificates in a database.
1311 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
1312 new CRLs added to a directory can be used. New command line option
1313 -verify_return_error to s_client and s_server. This causes real errors
1314 to be returned by the verify callback instead of carrying on no matter
1315 what. This reflects the way a "real world" verify callback would behave.
1318 *) GOST engine, supporting several GOST algorithms and public key formats.
1319 Kindly donated by Cryptocom.
1322 *) Partial support for Issuing Distribution Point CRL extension. CRLs
1323 partitioned by DP are handled but no indirect CRL or reason partitioning
1324 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
1325 selected via a scoring technique which handles IDP and AKID in CRLs.
1328 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
1329 will ultimately be used for all verify operations: this will remove the
1330 X509_STORE dependency on certificate verification and allow alternative
1331 lookup methods. X509_STORE based implementations of these two callbacks.
1334 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
1335 Modify get_crl() to find a valid (unexpired) CRL if possible.
1338 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
1339 this would be called X509_CRL_cmp() but that name is already used by
1340 a function that just compares CRL issuer names. Cache several CRL
1341 extensions in X509_CRL structure and cache CRLDP in X509.
1344 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
1345 this maps equivalent X509_NAME structures into a consistent structure.
1346 Name comparison can then be performed rapidly using memcmp().
1349 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
1353 *) Allow digests to supply their own micalg string for S/MIME type using
1354 the ctrl EVP_MD_CTRL_MICALG.
1357 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
1358 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
1359 ctrl. It can then customise the structure before and/or after signing
1363 *) New function OBJ_add_sigid() to allow application defined signature OIDs
1364 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
1365 to free up any added signature OIDs.
1368 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
1369 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
1370 digest and cipher tables. New options added to openssl utility:
1371 list-message-digest-algorithms and list-cipher-algorithms.
1374 *) Change the array representation of binary polynomials: the list
1375 of degrees of non-zero coefficients is now terminated with -1.
1376 Previously it was terminated with 0, which was also part of the
1377 value; thus, the array representation was not applicable to
1378 polynomials where t^0 has coefficient zero. This change makes
1379 the array representation useful in a more general context.
1382 *) Various modifications and fixes to SSL/TLS cipher string
1383 handling. For ECC, the code now distinguishes between fixed ECDH
1384 with RSA certificates on the one hand and with ECDSA certificates
1385 on the other hand, since these are separate ciphersuites. The
1386 unused code for Fortezza ciphersuites has been removed.
1388 For consistency with EDH, ephemeral ECDH is now called "EECDH"
1389 (not "ECDHE"). For consistency with the code for DH
1390 certificates, use of ECDH certificates is now considered ECDH
1391 authentication, not RSA or ECDSA authentication (the latter is
1392 merely the CA's signing algorithm and not actively used in the
1395 The temporary ciphersuite alias "ECCdraft" is no longer
1396 available, and ECC ciphersuites are no longer excluded from "ALL"
1397 and "DEFAULT". The following aliases now exist for RFC 4492
1398 ciphersuites, most of these by analogy with the DH case:
1400 kECDHr - ECDH cert, signed with RSA
1401 kECDHe - ECDH cert, signed with ECDSA
1402 kECDH - ECDH cert (signed with either RSA or ECDSA)
1403 kEECDH - ephemeral ECDH
1404 ECDH - ECDH cert or ephemeral ECDH
1410 AECDH - anonymous ECDH
1411 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
1415 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
1416 Use correct micalg parameters depending on digest(s) in signed message.
1419 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
1420 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
1423 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
1424 an engine to register a method. Add ENGINE lookups for methods and
1425 functional reference processing.
1428 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
1429 EVP_{Sign,Verify}* which allow an application to customise the signature
1433 *) New -resign option to smime utility. This adds one or more signers
1434 to an existing PKCS#7 signedData structure. Also -md option to use an
1435 alternative message digest algorithm for signing.
1438 *) Tidy up PKCS#7 routines and add new functions to make it easier to
1439 create PKCS7 structures containing multiple signers. Update smime
1440 application to support multiple signers.
1443 *) New -macalg option to pkcs12 utility to allow setting of an alternative
1447 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
1448 Reorganize PBE internals to lookup from a static table using NIDs,
1449 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
1450 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
1451 PRF which will be automatically used with PBES2.
1454 *) Replace the algorithm specific calls to generate keys in "req" with the
1458 *) Update PKCS#7 enveloped data routines to use new API. This is now
1459 supported by any public key method supporting the encrypt operation. A
1460 ctrl is added to allow the public key algorithm to examine or modify
1461 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
1465 *) Add a ctrl to asn1 method to allow a public key algorithm to express
1466 a default digest type to use. In most cases this will be SHA1 but some
1467 algorithms (such as GOST) need to specify an alternative digest. The
1468 return value indicates how strong the prefernce is 1 means optional and
1469 2 is mandatory (that is it is the only supported type). Modify
1470 ASN1_item_sign() to accept a NULL digest argument to indicate it should
1471 use the default md. Update openssl utilities to use the default digest
1472 type for signing if it is not explicitly indicated.
1475 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
1476 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
1477 signing method from the key type. This effectively removes the link
1478 between digests and public key types.
1481 *) Add an OID cross reference table and utility functions. Its purpose is to
1482 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
1483 rsaEncryption. This will allow some of the algorithm specific hackery
1484 needed to use the correct OID to be removed.
1487 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
1488 structures for PKCS7_sign(). They are now set up by the relevant public
1492 *) Add provisional EC pkey method with support for ECDSA and ECDH.
1495 *) Add support for key derivation (agreement) in the API, DH method and
1499 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
1500 public and private key formats. As a side effect these add additional
1501 command line functionality not previously available: DSA signatures can be
1502 generated and verified using pkeyutl and DH key support and generation in
1507 [Oliver Tappe <zooey@hirschkaefer.de>]
1509 *) New make target "install_html_docs" installs HTML renditions of the
1511 [Oliver Tappe <zooey@hirschkaefer.de>]
1513 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
1514 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
1515 support key and parameter generation and add initial key generation
1516 functionality for RSA.
1519 *) Add functions for main EVP_PKEY_method operations. The undocumented
1520 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
1521 EVP_PKEY_{encrypt,decrypt}_old.
1524 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
1525 key API, doesn't do much yet.
1528 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
1529 public key algorithms. New option to openssl utility:
1530 "list-public-key-algorithms" to print out info.
1533 *) Implement the Supported Elliptic Curves Extension for
1534 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1537 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
1538 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
1541 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
1542 utilities such as rsa, dsa, dsaparam etc except they process any key
1546 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
1547 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
1548 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
1552 *) Initial support for pluggable public key ASN1.
1553 De-spaghettify the public key ASN1 handling. Move public and private
1554 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
1555 algorithm specific handling to a single module within the relevant
1556 algorithm directory. Add functions to allow (near) opaque processing
1557 of public and private key structures.
1560 *) Implement the Supported Point Formats Extension for
1561 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1564 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
1565 for the psk identity [hint] and the psk callback functions to the
1566 SSL_SESSION, SSL and SSL_CTX structure.
1569 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
1573 SSL_CTX_use_psk_identity_hint
1574 SSL_get_psk_identity_hint
1575 SSL_get_psk_identity
1576 SSL_use_psk_identity_hint
1578 [Mika Kousa and Pasi Eronen of Nokia Corporation]
1580 *) Add RFC 3161 compliant time stamp request creation, response generation
1581 and response verification functionality.
1582 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
1584 *) Add initial support for TLS extensions, specifically for the server_name
1585 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1586 have new members for a host name. The SSL data structure has an
1587 additional member SSL_CTX *initial_ctx so that new sessions can be
1588 stored in that context to allow for session resumption, even after the
1589 SSL has been switched to a new SSL_CTX in reaction to a client's
1590 server_name extension.
1592 New functions (subject to change):
1594 SSL_get_servername()
1595 SSL_get_servername_type()
1598 New CTRL codes and macros (subject to change):
1600 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1601 - SSL_CTX_set_tlsext_servername_callback()
1602 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1603 - SSL_CTX_set_tlsext_servername_arg()
1604 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1606 openssl s_client has a new '-servername ...' option.
1608 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1609 '-key2 ...', '-servername_fatal' (subject to change). This allows
1610 testing the HostName extension for a specific single host name ('-cert'
1611 and '-key' remain fallbacks for handshakes without HostName
1612 negotiation). If the unrecogninzed_name alert has to be sent, this by
1613 default is a warning; it becomes fatal with the '-servername_fatal'
1616 [Peter Sylvester, Remy Allais, Christophe Renou]
1618 *) Whirlpool hash implementation is added.
1621 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
1622 bn(64,32). Because of instruction set limitations it doesn't have
1623 any negative impact on performance. This was done mostly in order
1624 to make it possible to share assembler modules, such as bn_mul_mont
1625 implementations, between 32- and 64-bit builds without hassle.
1628 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
1629 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
1633 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
1634 dedicated Montgomery multiplication procedure, is introduced.
1635 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
1636 "64-bit" performance on certain 32-bit targets.
1639 *) New option SSL_OP_NO_COMP to disable use of compression selectively
1640 in SSL structures. New SSL ctrl to set maximum send fragment size.
1641 Save memory by seeting the I/O buffer sizes dynamically instead of
1642 using the maximum available value.
1645 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
1646 in addition to the text details.
1649 *) Very, very preliminary EXPERIMENTAL support for printing of general
1650 ASN1 structures. This currently produces rather ugly output and doesn't
1651 handle several customised structures at all.
1654 *) Integrated support for PVK file format and some related formats such
1655 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
1656 these in the 'rsa' and 'dsa' utilities.
1659 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
1662 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
1663 place for the (very old) "NETSCAPE" format certificates which are now
1664 handled using new ASN1 code equivalents.
1667 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
1668 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
1669 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
1672 *) Modify CRL distribution points extension code to print out previously
1673 unsupported fields. Enhance extension setting code to allow setting of
1677 *) Add print and set support for Issuing Distribution Point CRL extension.
1680 *) Change 'Configure' script to enable Camellia by default.
1683 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
1685 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1686 Thanks to Antonio Martin, Enterprise Secure Access Research and
1687 Development, Cisco Systems, Inc. for discovering this bug and
1688 preparing a fix. (CVE-2012-0050)
1691 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
1693 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1694 of the Vaudenay padding oracle attack on CBC mode encryption
1695 which enables an efficient plaintext recovery attack against
1696 the OpenSSL implementation of DTLS. Their attack exploits timing
1697 differences arising during decryption processing. A research
1698 paper describing this attack can be found at:
1699 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1700 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1701 Security Group at Royal Holloway, University of London
1702 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1703 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1704 for preparing the fix. (CVE-2011-4108)
1705 [Robin Seggelmann, Michael Tuexen]
1707 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
1708 [Ben Laurie, Kasper <ekasper@google.com>]
1710 *) Clear bytes used for block padding of SSL 3.0 records.
1712 [Adam Langley (Google)]
1714 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1715 Kadianakis <desnacked@gmail.com> for discovering this issue and
1716 Adam Langley for preparing the fix. (CVE-2011-4619)
1717 [Adam Langley (Google)]
1719 *) Prevent malformed RFC3779 data triggering an assertion failure.
1720 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1721 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1722 [Rob Austein <sra@hactrn.net>]
1724 *) Fix ssl_ciph.c set-up race.
1725 [Adam Langley (Google)]
1727 *) Fix spurious failures in ecdsatest.c.
1728 [Emilia Käsper (Google)]
1730 *) Fix the BIO_f_buffer() implementation (which was mixing different
1731 interpretations of the '..._len' fields).
1732 [Adam Langley (Google)]
1734 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1735 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1736 threads won't reuse the same blinding coefficients.
1738 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1739 lock to call BN_BLINDING_invert_ex, and avoids one use of
1740 BN_BLINDING_update for each BN_BLINDING structure (previously,
1741 the last update always remained unused).
1742 [Emilia Käsper (Google)]
1744 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1745 for multi-threaded use of ECDH.
1746 [Adam Langley (Google)]
1748 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1751 *) Add protection against ECDSA timing attacks as mentioned in the paper
1752 by Billy Bob Brumley and Nicola Tuveri, see:
1754 http://eprint.iacr.org/2011/232.pdf
1756 [Billy Bob Brumley and Nicola Tuveri]
1758 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
1760 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1761 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1763 *) Fix bug in string printing code: if *any* escaping is enabled we must
1764 escape the escape character (backslash) or the resulting string is
1768 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
1770 *) Disable code workaround for ancient and obsolete Netscape browsers
1771 and servers: an attacker can use it in a ciphersuite downgrade attack.
1772 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1775 *) Fixed J-PAKE implementation error, originally discovered by
1776 Sebastien Martini, further info and confirmation from Stefan
1777 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1780 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
1782 *) Fix extension code to avoid race conditions which can result in a buffer
1783 overrun vulnerability: resumed sessions must not be modified as they can
1784 be shared by multiple threads. CVE-2010-3864
1787 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
1790 *) Don't reencode certificate when calculating signature: cache and use
1791 the original encoding instead. This makes signature verification of
1792 some broken encodings work correctly.
1795 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
1796 is also one of the inputs.
1797 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
1799 *) Don't repeatedly append PBE algorithms to table if they already exist.
1800 Sort table on each new add. This effectively makes the table read only
1801 after all algorithms are added and subsequent calls to PKCS12_pbe_add
1805 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
1807 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
1810 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
1811 access or freeing data twice (CVE-2010-0742)
1812 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
1814 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
1815 common in certificates and some applications which only call
1816 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
1820 Reduce copying into .apps and .test in makevms.com
1821 Don't try to use blank CA certificate in CA.com
1822 Allow use of C files from original directories in maketests.com
1823 [Steven M. Schweda" <sms@antinode.info>]
1825 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
1827 *) When rejecting SSL/TLS records due to an incorrect version number, never
1828 update s->server with a new major version number. As of
1829 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
1830 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
1831 the previous behavior could result in a read attempt at NULL when
1832 receiving specific incorrect SSL/TLS records once record payload
1833 protection is active. (CVE-2010-0740)
1834 [Bodo Moeller, Adam Langley <agl@chromium.org>]
1836 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
1837 could be crashed if the relevant tables were not present (e.g. chrooted).
1838 [Tomas Hoger <thoger@redhat.com>]
1840 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
1842 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
1843 [Martin Olsson, Neel Mehta]
1845 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
1846 accommodate for stack sorting, always a write lock!).
1849 *) On some versions of WIN32 Heap32Next is very slow. This can cause
1850 excessive delays in the RAND_poll(): over a minute. As a workaround
1851 include a time check in the inner Heap32Next loop too.
1854 *) The code that handled flushing of data in SSL/TLS originally used the
1855 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
1856 the problem outlined in PR#1949. The fix suggested there however can
1857 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
1858 of Apache). So instead simplify the code to flush unconditionally.
1859 This should be fine since flushing with no data to flush is a no op.
1862 *) Handle TLS versions 2.0 and later properly and correctly use the
1863 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
1864 off ancient servers have a habit of sticking around for a while...
1867 *) Modify compression code so it frees up structures without using the
1868 ex_data callbacks. This works around a problem where some applications
1869 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
1870 restarting) then use compression (e.g. SSL with compression) later.
1871 This results in significant per-connection memory leaks and
1872 has caused some security issues including CVE-2008-1678 and
1876 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
1877 change when encrypting or decrypting.
1880 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
1881 connect and renegotiate with servers which do not support RI.
1882 Until RI is more widely deployed this option is enabled by default.
1885 *) Add "missing" ssl ctrls to clear options and mode.
1888 *) If client attempts to renegotiate and doesn't support RI respond with
1889 a no_renegotiation alert as required by RFC5746. Some renegotiating
1890 TLS clients will continue a connection gracefully when they receive
1891 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1892 waiting for a server hello which it will never receive. Now we treat a
1893 received no_renegotiation alert as a fatal error. This is because
1894 applications requesting a renegotiation might well expect it to succeed
1895 and would have no code in place to handle the server denying it so the
1896 only safe thing to do is to terminate the connection.
1899 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1900 peer supports secure renegotiation and 0 otherwise. Print out peer
1901 renegotiation support in s_client/s_server.
1904 *) Replace the highly broken and deprecated SPKAC certification method with
1905 the updated NID creation version. This should correctly handle UTF8.
1908 *) Implement RFC5746. Re-enable renegotiation but require the extension
1909 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1910 turns out to be a bad idea. It has been replaced by
1911 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1912 SSL_CTX_set_options(). This is really not recommended unless you
1913 know what you are doing.
1914 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1916 *) Fixes to stateless session resumption handling. Use initial_ctx when
1917 issuing and attempting to decrypt tickets in case it has changed during
1918 servername handling. Use a non-zero length session ID when attempting
1919 stateless session resumption: this makes it possible to determine if
1920 a resumption has occurred immediately after receiving server hello
1921 (several places in OpenSSL subtly assume this) instead of later in
1925 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1926 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1927 fixes for a few places where the return code is not checked
1929 [Julia Lawall <julia@diku.dk>]
1931 *) Add --strict-warnings option to Configure script to include devteam
1932 warnings in other configurations.
1935 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1936 makes it possible to install openssl libraries in locations which
1937 have names other than "lib", for example "/usr/lib64" which some
1939 [Steve Henson, based on patch from Jeremy Utley]
1941 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1942 X690 8.9.12 and can produce some misleading textual output of OIDs.
1943 [Steve Henson, reported by Dan Kaminsky]
1945 *) Delete MD2 from algorithm tables. This follows the recommendation in
1946 several standards that it is not used in new applications due to
1947 several cryptographic weaknesses. For binary compatibility reasons
1948 the MD2 API is still compiled in by default.
1951 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1955 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1956 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1958 [Guenter <lists@gknw.net>]
1960 *) Fix the server certificate chain building code to use X509_verify_cert(),
1961 it used to have an ad-hoc builder which was unable to cope with anything
1962 other than a simple chain.
1963 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1965 *) Don't check self signed certificate signatures in X509_verify_cert()
1966 by default (a flag can override this): it just wastes time without
1967 adding any security. As a useful side effect self signed root CAs
1968 with non-FIPS digests are now usable in FIPS mode.
1971 *) In dtls1_process_out_of_seq_message() the check if the current message
1972 is already buffered was missing. For every new message was memory
1973 allocated, allowing an attacker to perform an denial of service attack
1974 with sending out of seq handshake messages until there is no memory
1975 left. Additionally every future messege was buffered, even if the
1976 sequence number made no sense and would be part of another handshake.
1977 So only messages with sequence numbers less than 10 in advance will be
1978 buffered. (CVE-2009-1378)
1979 [Robin Seggelmann, discovered by Daniel Mentz]
1981 *) Records are buffered if they arrive with a future epoch to be
1982 processed after finishing the corresponding handshake. There is
1983 currently no limitation to this buffer allowing an attacker to perform
1984 a DOS attack with sending records with future epochs until there is no
1985 memory left. This patch adds the pqueue_size() function to detemine
1986 the size of a buffer and limits the record buffer to 100 entries.
1988 [Robin Seggelmann, discovered by Daniel Mentz]
1990 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
1991 parent structure is freed. (CVE-2009-1379)
1994 *) Handle non-blocking I/O properly in SSL_shutdown() call.
1995 [Darryl Miles <darryl-mailinglists@netbauds.net>]
1998 [Ilya O. <vrghost@gmail.com>]
2000 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
2002 *) Disable renegotiation completely - this fixes a severe security
2003 problem (CVE-2009-3555) at the cost of breaking all
2004 renegotiation. Renegotiation can be re-enabled by setting
2005 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
2006 run-time. This is really not recommended unless you know what
2010 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
2012 *) Don't set val to NULL when freeing up structures, it is freed up by
2013 underlying code. If sizeof(void *) > sizeof(long) this can result in
2014 zeroing past the valid field. (CVE-2009-0789)
2015 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
2017 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
2018 checked correctly. This would allow some invalid signed attributes to
2019 appear to verify correctly. (CVE-2009-0591)
2020 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2022 *) Reject UniversalString and BMPString types with invalid lengths. This
2023 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
2024 a legal length. (CVE-2009-0590)
2027 *) Set S/MIME signing as the default purpose rather than setting it
2028 unconditionally. This allows applications to override it at the store
2032 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2033 to handle some structures.
2036 *) Improve efficiency of mem_gets: don't search whole buffer each time
2038 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2040 *) New -hex option for openssl rand.
2043 *) Print out UTF8String and NumericString when parsing ASN1.
2046 *) Support NumericString type for name components.
2049 *) Allow CC in the environment to override the automatically chosen
2050 compiler. Note that nothing is done to ensure flags work with the
2054 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2056 *) Properly check EVP_VerifyFinal() and similar return values
2058 [Ben Laurie, Bodo Moeller, Google Security Team]
2060 *) Enable TLS extensions by default.
2063 *) Allow the CHIL engine to be loaded, whether the application is
2064 multithreaded or not. (This does not release the developer from the
2065 obligation to set up the dynamic locking callbacks.)
2066 [Sander Temme <sander@temme.net>]
2068 *) Use correct exit code if there is an error in dgst command.
2069 [Steve Henson; problem pointed out by Roland Dirlewanger]
2071 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2072 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2075 *) Add experimental JPAKE support, including demo authentication in
2076 s_client and s_server.
2079 *) Set the comparison function in v3_addr_canonize().
2080 [Rob Austein <sra@hactrn.net>]
2082 *) Add support for XMPP STARTTLS in s_client.
2083 [Philip Paeps <philip@freebsd.org>]
2085 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2086 to ensure that even with this option, only ciphersuites in the
2087 server's preference list will be accepted. (Note that the option
2088 applies only when resuming a session, so the earlier behavior was
2089 just about the algorithm choice for symmetric cryptography.)
2092 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2094 *) Fix NULL pointer dereference if a DTLS server received
2095 ChangeCipherSpec as first record (CVE-2009-1386).
2098 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
2099 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2102 *) The fix in 0.9.8c that supposedly got rid of unsafe
2103 double-checked locking was incomplete for RSA blinding,
2104 addressing just one layer of what turns out to have been
2105 doubly unsafe triple-checked locking.
2107 So now fix this for real by retiring the MONT_HELPER macro
2108 in crypto/rsa/rsa_eay.c.
2110 [Bodo Moeller; problem pointed out by Marius Schilder]
2112 *) Various precautionary measures:
2114 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2116 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2117 (NB: This would require knowledge of the secret session ticket key
2118 to exploit, in which case you'd be SOL either way.)
2120 - Change bn_nist.c so that it will properly handle input BIGNUMs
2121 outside the expected range.
2123 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2126 [Neel Mehta, Bodo Moeller]
2128 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2129 the load fails. Useful for distros.
2130 [Ben Laurie and the FreeBSD team]
2132 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2135 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2138 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2140 This work was sponsored by Logica.
2143 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2144 keystores. Support for SSL/TLS client authentication too.
2145 Not compiled unless enable-capieng specified to Configure.
2147 This work was sponsored by Logica.
2150 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2151 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2152 attribute creation routines such as certifcate requests and PKCS#12
2156 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2158 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2159 handshake which could lead to a cilent crash as found using the
2160 Codenomicon TLS test suite (CVE-2008-1672)
2161 [Steve Henson, Mark Cox]
2163 *) Fix double free in TLS server name extensions which could lead to
2164 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2167 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2169 Clear the error queue to ensure that error entries left from
2170 older function calls do not interfere with the correct operation.
2171 [Lutz Jaenicke, Erik de Castro Lopo]
2173 *) Remove root CA certificates of commercial CAs:
2175 The OpenSSL project does not recommend any specific CA and does not
2176 have any policy with respect to including or excluding any CA.
2177 Therefore it does not make any sense to ship an arbitrary selection
2178 of root CA certificates with the OpenSSL software.
2181 *) RSA OAEP patches to fix two separate invalid memory reads.
2182 The first one involves inputs when 'lzero' is greater than
2183 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
2184 before the beginning of from). The second one involves inputs where
2185 the 'db' section contains nothing but zeroes (there is a one-byte
2186 invalid read after the end of 'db').
2187 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2189 *) Partial backport from 0.9.9-dev:
2191 Introduce bn_mul_mont (dedicated Montgomery multiplication
2192 procedure) as a candidate for BIGNUM assembler implementation.
2193 While 0.9.9-dev uses assembler for various architectures, only
2194 x86_64 is available by default here in the 0.9.8 branch, and
2195 32-bit x86 is available through a compile-time setting.
2197 To try the 32-bit x86 assembler implementation, use Configure
2198 option "enable-montasm" (which exists only for this backport).
2200 As "enable-montasm" for 32-bit x86 disclaims code stability
2201 anyway, in this constellation we activate additional code
2202 backported from 0.9.9-dev for further performance improvements,
2203 namely BN_from_montgomery_word. (To enable this otherwise,
2204 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
2206 [Andy Polyakov (backport partially by Bodo Moeller)]
2208 *) Add TLS session ticket callback. This allows an application to set
2209 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
2210 values. This is useful for key rollover for example where several key
2211 sets may exist with different names.
2214 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
2215 This was broken until now in 0.9.8 releases, such that the only way
2216 a registered ENGINE could be used (assuming it initialises
2217 successfully on the host) was to explicitly set it as the default
2218 for the relevant algorithms. This is in contradiction with 0.9.7
2219 behaviour and the documentation. With this fix, when an ENGINE is
2220 registered into a given algorithm's table of implementations, the
2221 'uptodate' flag is reset so that auto-discovery will be used next
2222 time a new context for that algorithm attempts to select an
2224 [Ian Lister (tweaked by Geoff Thorpe)]
2226 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
2227 implemention in the following ways:
2229 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
2232 Lack of BER streaming support means one pass streaming processing is
2233 only supported if data is detached: setting the streaming flag is
2234 ignored for embedded content.
2236 CMS support is disabled by default and must be explicitly enabled
2237 with the enable-cms configuration option.
2240 *) Update the GMP engine glue to do direct copies between BIGNUM and
2241 mpz_t when openssl and GMP use the same limb size. Otherwise the
2242 existing "conversion via a text string export" trick is still used.
2243 [Paul Sheer <paulsheer@gmail.com>]
2245 *) Zlib compression BIO. This is a filter BIO which compressed and
2246 uncompresses any data passed through it.
2249 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
2250 RFC3394 compatible AES key wrapping.
2253 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
2254 sets string data without copying. X509_ALGOR_set0() and
2255 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
2256 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
2257 from an X509_ATTRIBUTE structure optionally checking it occurs only
2258 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
2262 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
2263 to get the expected BN_FLG_CONSTTIME behavior.
2264 [Bodo Moeller (Google)]
2268 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
2269 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
2270 - added some more tests to do_tests.pl
2271 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
2272 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
2273 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
2274 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
2275 - various changes to netware.pl to enable gcc-cross builds on Win32
2277 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
2278 - various changes to fix missing prototype warnings
2279 - fixed x86nasm.pl to create correct asm files for NASM COFF output
2280 - added AES, WHIRLPOOL and CPUID assembler code to build files
2281 - added missing AES assembler make rules to mk1mf.pl
2282 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
2283 [Guenter Knauf <eflash@gmx.net>]
2285 *) Implement certificate status request TLS extension defined in RFC3546.
2286 A client can set the appropriate parameters and receive the encoded
2287 OCSP response via a callback. A server can query the supplied parameters
2288 and set the encoded OCSP response in the callback. Add simplified examples
2289 to s_client and s_server.
2292 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
2294 *) Fix various bugs:
2295 + Binary incompatibility of ssl_ctx_st structure
2296 + DTLS interoperation with non-compliant servers
2297 + Don't call get_session_cb() without proposed session
2298 + Fix ia64 assembler code
2299 [Andy Polyakov, Steve Henson]
2301 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
2303 *) DTLS Handshake overhaul. There were longstanding issues with
2304 OpenSSL DTLS implementation, which were making it impossible for
2305 RFC 4347 compliant client to communicate with OpenSSL server.
2306 Unfortunately just fixing these incompatibilities would "cut off"
2307 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
2308 server keeps tolerating non RFC compliant syntax. The opposite is
2309 not true, 0.9.8f client can not communicate with earlier server.
2310 This update even addresses CVE-2007-4995.
2313 *) Changes to avoid need for function casts in OpenSSL: some compilers
2314 (gcc 4.2 and later) reject their use.
2315 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
2318 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2319 RFC4507bis. The encrypted ticket format is an encrypted encoded
2320 SSL_SESSION structure, that way new session features are automatically
2323 If a client application caches session in an SSL_SESSION structure
2324 support is transparent because tickets are now stored in the encoded
2327 The SSL_CTX structure automatically generates keys for ticket
2328 protection in servers so again support should be possible
2329 with no application modification.
2331 If a client or server wishes to disable RFC4507 support then the option
2332 SSL_OP_NO_TICKET can be set.
2334 Add a TLS extension debugging callback to allow the contents of any client
2335 or server extensions to be examined.
2337 This work was sponsored by Google.
2340 *) Add initial support for TLS extensions, specifically for the server_name
2341 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2342 have new members for a host name. The SSL data structure has an
2343 additional member SSL_CTX *initial_ctx so that new sessions can be
2344 stored in that context to allow for session resumption, even after the
2345 SSL has been switched to a new SSL_CTX in reaction to a client's
2346 server_name extension.
2348 New functions (subject to change):
2350 SSL_get_servername()
2351 SSL_get_servername_type()
2354 New CTRL codes and macros (subject to change):
2356 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2357 - SSL_CTX_set_tlsext_servername_callback()
2358 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2359 - SSL_CTX_set_tlsext_servername_arg()
2360 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2362 openssl s_client has a new '-servername ...' option.
2364 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2365 '-key2 ...', '-servername_fatal' (subject to change). This allows
2366 testing the HostName extension for a specific single host name ('-cert'
2367 and '-key' remain fallbacks for handshakes without HostName
2368 negotiation). If the unrecogninzed_name alert has to be sent, this by
2369 default is a warning; it becomes fatal with the '-servername_fatal'
2372 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
2374 *) Add AES and SSE2 assembly language support to VC++ build.
2377 *) Mitigate attack on final subtraction in Montgomery reduction.
2380 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
2381 (which previously caused an internal error).
2384 *) Squeeze another 10% out of IGE mode when in != out.
2387 *) AES IGE mode speedup.
2388 [Dean Gaudet (Google)]
2390 *) Add the Korean symmetric 128-bit cipher SEED (see
2391 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
2392 add SEED ciphersuites from RFC 4162:
2394 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
2395 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
2396 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
2397 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
2399 To minimize changes between patchlevels in the OpenSSL 0.9.8
2400 series, SEED remains excluded from compilation unless OpenSSL
2401 is configured with 'enable-seed'.
2402 [KISA, Bodo Moeller]
2404 *) Mitigate branch prediction attacks, which can be practical if a
2405 single processor is shared, allowing a spy process to extract
2406 information. For detailed background information, see
2407 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
2408 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
2409 and Necessary Software Countermeasures"). The core of the change
2410 are new versions BN_div_no_branch() and
2411 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
2412 respectively, which are slower, but avoid the security-relevant
2413 conditional branches. These are automatically called by BN_div()
2414 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
2415 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
2416 remove a conditional branch.
2418 BN_FLG_CONSTTIME is the new name for the previous
2419 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
2420 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
2421 in the exponent causes BN_mod_exp_mont() to use the alternative
2422 implementation in BN_mod_exp_mont_consttime().) The old name
2423 remains as a deprecated alias.
2425 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
2426 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
2427 constant-time implementations for more than just exponentiation.
2428 Here too the old name is kept as a deprecated alias.
2430 BN_BLINDING_new() will now use BN_dup() for the modulus so that
2431 the BN_BLINDING structure gets an independent copy of the
2432 modulus. This means that the previous "BIGNUM *m" argument to
2433 BN_BLINDING_new() and to BN_BLINDING_create_param() now
2434 essentially becomes "const BIGNUM *m", although we can't actually
2435 change this in the header file before 0.9.9. It allows
2436 RSA_setup_blinding() to use BN_with_flags() on the modulus to
2437 enable BN_FLG_CONSTTIME.
2439 [Matthew D Wood (Intel Corp)]
2441 *) In the SSL/TLS server implementation, be strict about session ID
2442 context matching (which matters if an application uses a single
2443 external cache for different purposes). Previously,
2444 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
2445 set. This did ensure strict client verification, but meant that,
2446 with applications using a single external cache for quite
2447 different requirements, clients could circumvent ciphersuite
2448 restrictions for a given session ID context by starting a session
2449 in a different context.
2452 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2453 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2454 authentication-only ciphersuites.
2457 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
2458 not complete and could lead to a possible single byte overflow
2459 (CVE-2007-5135) [Ben Laurie]
2461 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
2463 *) Since AES128 and AES256 (and similarly Camellia128 and
2464 Camellia256) share a single mask bit in the logic of
2465 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2466 kludge to work properly if AES128 is available and AES256 isn't
2467 (or if Camellia128 is available and Camellia256 isn't).
2470 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
2471 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
2472 When a point or a seed is encoded in a BIT STRING, we need to
2473 prevent the removal of trailing zero bits to get the proper DER
2474 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
2475 of a NamedBitList, for which trailing 0 bits need to be removed.)
2478 *) Have SSL/TLS server implementation tolerate "mismatched" record
2479 protocol version while receiving ClientHello even if the
2480 ClientHello is fragmented. (The server can't insist on the
2481 particular protocol version it has chosen before the ServerHello
2482 message has informed the client about his choice.)
2485 *) Add RFC 3779 support.
2486 [Rob Austein for ARIN, Ben Laurie]
2488 *) Load error codes if they are not already present instead of using a
2489 static variable. This allows them to be cleanly unloaded and reloaded.
2490 Improve header file function name parsing.
2493 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
2494 or CAPABILITY handshake as required by RFCs.
2497 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
2499 *) Introduce limits to prevent malicious keys being able to
2500 cause a denial of service. (CVE-2006-2940)
2501 [Steve Henson, Bodo Moeller]
2503 *) Fix ASN.1 parsing of certain invalid structures that can result
2504 in a denial of service. (CVE-2006-2937) [Steve Henson]
2506 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2507 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2509 *) Fix SSL client code which could crash if connecting to a
2510 malicious SSLv2 server. (CVE-2006-4343)
2511 [Tavis Ormandy and Will Drewry, Google Security Team]
2513 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
2514 match only those. Before that, "AES256-SHA" would be interpreted
2515 as a pattern and match "AES128-SHA" too (since AES128-SHA got
2516 the same strength classification in 0.9.7h) as we currently only
2517 have a single AES bit in the ciphersuite description bitmap.
2518 That change, however, also applied to ciphersuite strings such as
2519 "RC4-MD5" that intentionally matched multiple ciphersuites --
2520 namely, SSL 2.0 ciphersuites in addition to the more common ones
2521 from SSL 3.0/TLS 1.0.
2523 So we change the selection algorithm again: Naming an explicit
2524 ciphersuite selects this one ciphersuite, and any other similar
2525 ciphersuite (same bitmap) from *other* protocol versions.
2526 Thus, "RC4-MD5" again will properly select both the SSL 2.0
2527 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
2529 Since SSL 2.0 does not have any ciphersuites for which the
2530 128/256 bit distinction would be relevant, this works for now.
2531 The proper fix will be to use different bits for AES128 and
2532 AES256, which would have avoided the problems from the beginning;
2533 however, bits are scarce, so we can only do this in a new release
2534 (not just a patchlevel) when we can change the SSL_CIPHER
2535 definition to split the single 'unsigned long mask' bitmap into
2536 multiple values to extend the available space.
2540 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
2542 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2543 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2545 *) Add AES IGE and biIGE modes.
2548 *) Change the Unix randomness entropy gathering to use poll() when
2549 possible instead of select(), since the latter has some
2550 undesirable limitations.
2551 [Darryl Miles via Richard Levitte and Bodo Moeller]
2553 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
2554 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
2555 cannot be implicitly activated as part of, e.g., the "AES" alias.
2556 However, please upgrade to OpenSSL 0.9.9[-dev] for
2557 non-experimental use of the ECC ciphersuites to get TLS extension
2558 support, which is required for curve and point format negotiation
2559 to avoid potential handshake problems.
2562 *) Disable rogue ciphersuites:
2564 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
2565 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
2566 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
2568 The latter two were purportedly from
2569 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
2572 Also deactivate the remaining ciphersuites from
2573 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
2574 unofficial, and the ID has long expired.
2577 *) Fix RSA blinding Heisenbug (problems sometimes occured on
2578 dual-core machines) and other potential thread-safety issues.
2581 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
2582 versions), which is now available for royalty-free use
2583 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
2584 Also, add Camellia TLS ciphersuites from RFC 4132.
2586 To minimize changes between patchlevels in the OpenSSL 0.9.8
2587 series, Camellia remains excluded from compilation unless OpenSSL
2588 is configured with 'enable-camellia'.
2591 *) Disable the padding bug check when compression is in use. The padding
2592 bug check assumes the first packet is of even length, this is not
2593 necessarily true if compresssion is enabled and can result in false
2594 positives causing handshake failure. The actual bug test is ancient
2595 code so it is hoped that implementations will either have fixed it by
2596 now or any which still have the bug do not support compression.
2599 Changes between 0.9.8a and 0.9.8b [04 May 2006]
2601 *) When applying a cipher rule check to see if string match is an explicit
2602 cipher suite and only match that one cipher suite if it is.
2605 *) Link in manifests for VC++ if needed.
2606 [Austin Ziegler <halostatue@gmail.com>]
2608 *) Update support for ECC-based TLS ciphersuites according to
2609 draft-ietf-tls-ecc-12.txt with proposed changes (but without
2610 TLS extensions, which are supported starting with the 0.9.9
2611 branch, not in the OpenSSL 0.9.8 branch).
2614 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
2615 opaque EVP_CIPHER_CTX handling.
2618 *) Fixes and enhancements to zlib compression code. We now only use
2619 "zlib1.dll" and use the default __cdecl calling convention on Win32
2620 to conform with the standards mentioned here:
2621 http://www.zlib.net/DLL_FAQ.txt
2622 Static zlib linking now works on Windows and the new --with-zlib-include
2623 --with-zlib-lib options to Configure can be used to supply the location
2624 of the headers and library. Gracefully handle case where zlib library
2628 *) Several fixes and enhancements to the OID generation code. The old code
2629 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
2630 handle numbers larger than ULONG_MAX, truncated printing and had a
2631 non standard OBJ_obj2txt() behaviour.
2634 *) Add support for building of engines under engine/ as shared libraries
2635 under VC++ build system.
2638 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
2639 Hopefully, we will not see any false combination of paths any more.
2642 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
2644 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2645 (part of SSL_OP_ALL). This option used to disable the
2646 countermeasure against man-in-the-middle protocol-version
2647 rollback in the SSL 2.0 server implementation, which is a bad
2648 idea. (CVE-2005-2969)
2650 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2651 for Information Security, National Institute of Advanced Industrial
2652 Science and Technology [AIST], Japan)]
2654 *) Add two function to clear and return the verify parameter flags.
2657 *) Keep cipherlists sorted in the source instead of sorting them at
2658 runtime, thus removing the need for a lock.
2661 *) Avoid some small subgroup attacks in Diffie-Hellman.
2662 [Nick Mathewson and Ben Laurie]
2664 *) Add functions for well-known primes.
2667 *) Extended Windows CE support.
2668 [Satoshi Nakamura and Andy Polyakov]
2670 *) Initialize SSL_METHOD structures at compile time instead of during
2671 runtime, thus removing the need for a lock.
2674 *) Make PKCS7_decrypt() work even if no certificate is supplied by
2675 attempting to decrypt each encrypted key in turn. Add support to
2679 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
2681 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
2684 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
2687 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
2688 key into the same file any more.
2691 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
2694 *) Add -utf8 command line and config file option to 'ca'.
2695 [Stefan <stf@udoma.org]
2697 *) Removed the macro des_crypt(), as it seems to conflict with some
2698 libraries. Use DES_crypt().
2701 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
2702 involves renaming the source and generated shared-libs for
2703 both. The engines will accept the corrected or legacy ids
2704 ('ncipher' and '4758_cca' respectively) when binding. NB,
2705 this only applies when building 'shared'.
2706 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
2708 *) Add attribute functions to EVP_PKEY structure. Modify
2709 PKCS12_create() to recognize a CSP name attribute and
2710 use it. Make -CSP option work again in pkcs12 utility.
2713 *) Add new functionality to the bn blinding code:
2714 - automatic re-creation of the BN_BLINDING parameters after
2715 a fixed number of uses (currently 32)
2716 - add new function for parameter creation
2717 - introduce flags to control the update behaviour of the
2718 BN_BLINDING parameters
2719 - hide BN_BLINDING structure
2720 Add a second BN_BLINDING slot to the RSA structure to improve
2721 performance when a single RSA object is shared among several
2725 *) Add support for DTLS.
2726 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
2728 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
2729 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
2732 *) Remove buggy and incompletet DH cert support from
2733 ssl/ssl_rsa.c and ssl/s3_both.c
2736 *) Use SHA-1 instead of MD5 as the default digest algorithm for
2737 the apps/openssl applications.
2740 *) Compile clean with "-Wall -Wmissing-prototypes
2741 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
2742 DEBUG_SAFESTACK must also be set.
2745 *) Change ./Configure so that certain algorithms can be disabled by default.
2746 The new counterpiece to "no-xxx" is "enable-xxx".
2748 The patented RC5 and MDC2 algorithms will now be disabled unless
2749 "enable-rc5" and "enable-mdc2", respectively, are specified.
2751 (IDEA remains enabled despite being patented. This is because IDEA
2752 is frequently required for interoperability, and there is no license
2753 fee for non-commercial use. As before, "no-idea" can be used to
2754 avoid this algorithm.)
2758 *) Add processing of proxy certificates (see RFC 3820). This work was
2759 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
2760 EGEE (Enabling Grids for E-science in Europe).
2763 *) RC4 performance overhaul on modern architectures/implementations, such
2764 as Intel P4, IA-64 and AMD64.
2767 *) New utility extract-section.pl. This can be used specify an alternative
2768 section number in a pod file instead of having to treat each file as
2769 a separate case in Makefile. This can be done by adding two lines to the
2772 =for comment openssl_section:XXX
2774 The blank line is mandatory.
2778 *) New arguments -certform, -keyform and -pass for s_client and s_server
2779 to allow alternative format key and certificate files and passphrase
2783 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
2784 update associated structures and add various utility functions.
2786 Add new policy related verify parameters, include policy checking in
2787 standard verify code. Enhance 'smime' application with extra parameters
2788 to support policy checking and print out.
2791 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
2792 Nehemiah processors. These extensions support AES encryption in hardware
2793 as well as RNG (though RNG support is currently disabled).
2794 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
2796 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
2799 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
2800 [Andy Polyakov and a number of other people]
2802 *) Improved PowerPC platform support. Most notably BIGNUM assembler
2803 implementation contributed by IBM.
2804 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
2806 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
2807 exponent rather than 'unsigned long'. There is a corresponding change to
2808 the new 'rsa_keygen' element of the RSA_METHOD structure.
2809 [Jelte Jansen, Geoff Thorpe]
2811 *) Functionality for creating the initial serial number file is now
2812 moved from CA.pl to the 'ca' utility with a new option -create_serial.
2814 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
2815 number file to 1, which is bound to cause problems. To avoid
2816 the problems while respecting compatibility between different 0.9.7
2817 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
2818 CA.pl for serial number initialization. With the new release 0.9.8,
2819 we can fix the problem directly in the 'ca' utility.)
2822 *) Reduced header interdepencies by declaring more opaque objects in
2823 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
2824 give fewer recursive includes, which could break lazy source code - so
2825 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
2826 developers should define this symbol when building and using openssl to
2827 ensure they track the recommended behaviour, interfaces, [etc], but
2828 backwards-compatible behaviour prevails when this isn't defined.
2831 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
2834 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
2835 This will generate a random key of the appropriate length based on the
2836 cipher context. The EVP_CIPHER can provide its own random key generation
2837 routine to support keys of a specific form. This is used in the des and
2838 3des routines to generate a key of the correct parity. Update S/MIME
2839 code to use new functions and hence generate correct parity DES keys.
2840 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
2841 valid (weak or incorrect parity).
2844 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
2845 as looking them up. This is useful when the verified structure may contain
2846 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
2847 present unless the new PKCS7_NO_CRL flag is asserted.
2850 *) Extend ASN1 oid configuration module. It now additionally accepts the
2853 shortName = some long name, 1.2.3.4
2856 *) Reimplemented the BN_CTX implementation. There is now no more static
2857 limitation on the number of variables it can handle nor the depth of the
2858 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
2859 information can now expand as required, and rather than having a single
2860 static array of bignums, BN_CTX now uses a linked-list of such arrays
2861 allowing it to expand on demand whilst maintaining the usefulness of
2862 BN_CTX's "bundling".
2865 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
2866 to allow all RSA operations to function using a single BN_CTX.
2869 *) Preliminary support for certificate policy evaluation and checking. This
2870 is initially intended to pass the tests outlined in "Conformance Testing
2871 of Relying Party Client Certificate Path Processing Logic" v1.07.
2874 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
2875 remained unused and not that useful. A variety of other little bignum
2876 tweaks and fixes have also been made continuing on from the audit (see
2880 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
2881 associated ASN1, EVP and SSL functions and old ASN1 macros.
2884 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
2885 and this should never fail. So the return value from the use of
2886 BN_set_word() (which can fail due to needless expansion) is now deprecated;
2887 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
2890 *) BN_CTX_get() should return zero-valued bignums, providing the same
2891 initialised value as BN_new().
2892 [Geoff Thorpe, suggested by Ulf Möller]
2894 *) Support for inhibitAnyPolicy certificate extension.
2897 *) An audit of the BIGNUM code is underway, for which debugging code is
2898 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2899 is considered valid when processing BIGNUMs, and causes execution to
2900 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2901 further steps are taken to deliberately pollute unused data in BIGNUM
2902 structures to try and expose faulty code further on. For now, openssl will
2903 (in its default mode of operation) continue to tolerate the inconsistent
2904 forms that it has tolerated in the past, but authors and packagers should
2905 consider trying openssl and their own applications when compiled with
2906 these debugging symbols defined. It will help highlight potential bugs in
2907 their own code, and will improve the test coverage for OpenSSL itself. At
2908 some point, these tighter rules will become openssl's default to improve
2909 maintainability, though the assert()s and other overheads will remain only
2910 in debugging configurations. See bn.h for more details.
2911 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2913 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2914 that can only be obtained through BN_CTX_new() (which implicitly
2915 initialises it). The presence of this function only made it possible
2916 to overwrite an existing structure (and cause memory leaks).
2919 *) Because of the callback-based approach for implementing LHASH as a
2920 template type, lh_insert() adds opaque objects to hash-tables and
2921 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2922 to clean up those corresponding objects before destroying the hash table
2923 (and losing the object pointers). So some over-zealous constifications in
2924 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2925 objects as "const" and the lh_doall[_arg] callback wrappers are not
2926 prototyped to have "const" restrictions on the object pointers they are
2927 given (and so aren't required to cast them away any more).
2930 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2931 (speed) prefers to use its own implementation. The two implementations
2932 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2933 its object type properly exposed (MS_TM) instead of casting to/from "char
2934 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2935 aren't necessarily the greatest nomenclatures - but this is what was used
2936 internally to the implementation so I've used that for now.
2939 *) Ensure that deprecated functions do not get compiled when
2940 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2941 the self-tests were still using deprecated key-generation functions so
2942 these have been updated also.
2945 *) Reorganise PKCS#7 code to separate the digest location functionality
2946 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2947 New function PKCS7_set_digest() to set the digest type for PKCS#7
2948 digestedData type. Add additional code to correctly generate the
2949 digestedData type and add support for this type in PKCS7 initialization
2953 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2954 structure of type "other".
2957 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2958 sure the loop does correctly stop and breaking ("division by zero")
2959 modulus operations are not performed. The (pre-generated) prime
2960 table crypto/bn/bn_prime.h was already correct, but it could not be
2961 re-generated on some platforms because of the "division by zero"
2962 situation in the script.
2963 [Ralf S. Engelschall]
2965 *) Update support for ECC-based TLS ciphersuites according to
2966 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2967 SHA-1 now is only used for "small" curves (where the
2968 representation of a field element takes up to 24 bytes); for
2969 larger curves, the field element resulting from ECDH is directly
2970 used as premaster secret.
2971 [Douglas Stebila (Sun Microsystems Laboratories)]
2973 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2974 curve secp160r1 to the tests.
2975 [Douglas Stebila (Sun Microsystems Laboratories)]
2977 *) Add the possibility to load symbols globally with DSO.
2978 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
2980 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
2981 control of the error stack.
2984 *) Add support for STORE in ENGINE.
2987 *) Add the STORE type. The intention is to provide a common interface
2988 to certificate and key stores, be they simple file-based stores, or
2989 HSM-type store, or LDAP stores, or...
2990 NOTE: The code is currently UNTESTED and isn't really used anywhere.
2993 *) Add a generic structure called OPENSSL_ITEM. This can be used to
2994 pass a list of arguments to any function as well as provide a way
2995 for a function to pass data back to the caller.
2998 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
2999 works like BUF_strdup() but can be used to duplicate a portion of
3000 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
3004 *) Add the function sk_find_ex() which works like sk_find(), but will
3005 return an index to an element even if an exact match couldn't be
3006 found. The index is guaranteed to point at the element where the
3007 searched-for key would be inserted to preserve sorting order.
3010 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
3011 takes an extra flags argument for optional functionality. Currently,
3012 the following flags are defined:
3014 OBJ_BSEARCH_VALUE_ON_NOMATCH
3015 This one gets OBJ_bsearch_ex() to return a pointer to the first
3016 element where the comparing function returns a negative or zero
3019 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
3020 This one gets OBJ_bsearch_ex() to return a pointer to the first
3021 element where the comparing function returns zero. This is useful
3022 if there are more than one element where the comparing function
3026 *) Make it possible to create self-signed certificates with 'openssl ca'
3027 in such a way that the self-signed certificate becomes part of the
3028 CA database and uses the same mechanisms for serial number generation
3029 as all other certificate signing. The new flag '-selfsign' enables
3030 this functionality. Adapt CA.sh and CA.pl.in.
3033 *) Add functionality to check the public key of a certificate request
3034 against a given private. This is useful to check that a certificate
3035 request can be signed by that key (self-signing).
3038 *) Make it possible to have multiple active certificates with the same
3039 subject in the CA index file. This is done only if the keyword
3040 'unique_subject' is set to 'no' in the main CA section (default
3041 if 'CA_default') of the configuration file. The value is saved
3042 with the database itself in a separate index attribute file,
3043 named like the index file with '.attr' appended to the name.
3046 *) Generate muti valued AVAs using '+' notation in config files for
3050 *) Support for nameConstraints certificate extension.
3053 *) Support for policyConstraints certificate extension.
3056 *) Support for policyMappings certificate extension.
3059 *) Make sure the default DSA_METHOD implementation only uses its
3060 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
3061 and change its own handlers to be NULL so as to remove unnecessary
3062 indirection. This lets alternative implementations fallback to the
3063 default implementation more easily.
3066 *) Support for directoryName in GeneralName related extensions
3070 *) Make it possible to link applications using Makefile.shared.
3071 Make that possible even when linking against static libraries!
3074 *) Support for single pass processing for S/MIME signing. This now
3075 means that S/MIME signing can be done from a pipe, in addition
3076 cleartext signing (multipart/signed type) is effectively streaming
3077 and the signed data does not need to be all held in memory.
3079 This is done with a new flag PKCS7_STREAM. When this flag is set
3080 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
3081 is done after the data is output (and digests calculated) in
3082 SMIME_write_PKCS7().
3085 *) Add full support for -rpath/-R, both in shared libraries and
3086 applications, at least on the platforms where it's known how
3090 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
3091 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
3092 will now compute a table of multiples of the generator that
3093 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
3094 faster (notably in the case of a single point multiplication,
3095 scalar * generator).
3096 [Nils Larsch, Bodo Moeller]
3098 *) IPv6 support for certificate extensions. The various extensions
3099 which use the IP:a.b.c.d can now take IPv6 addresses using the
3100 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
3104 *) Added an ENGINE that implements RSA by performing private key
3105 exponentiations with the GMP library. The conversions to and from
3106 GMP's mpz_t format aren't optimised nor are any montgomery forms
3107 cached, and on x86 it appears OpenSSL's own performance has caught up.
3108 However there are likely to be other architectures where GMP could
3109 provide a boost. This ENGINE is not built in by default, but it can be
3110 specified at Configure time and should be accompanied by the necessary
3111 linker additions, eg;
3112 ./config -DOPENSSL_USE_GMP -lgmp
3115 *) "openssl engine" will not display ENGINE/DSO load failure errors when
3116 testing availability of engines with "-t" - the old behaviour is
3117 produced by increasing the feature's verbosity with "-tt".
3120 *) ECDSA routines: under certain error conditions uninitialized BN objects
3121 could be freed. Solution: make sure initialization is performed early
3122 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
3126 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
3127 and DH_METHOD (eg. by ENGINE implementations) to override the normal
3128 software implementations. For DSA and DH, parameter generation can
3129 also be overriden by providing the appropriate method callbacks.
3132 *) Change the "progress" mechanism used in key-generation and
3133 primality testing to functions that take a new BN_GENCB pointer in
3134 place of callback/argument pairs. The new API functions have "_ex"
3135 postfixes and the older functions are reimplemented as wrappers for
3136 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
3137 declarations of the old functions to help (graceful) attempts to
3138 migrate to the new functions. Also, the new key-generation API
3139 functions operate on a caller-supplied key-structure and return
3140 success/failure rather than returning a key or NULL - this is to
3141 help make "keygen" another member function of RSA_METHOD etc.
3143 Example for using the new callback interface:
3145 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
3149 BN_GENCB_set(&my_cb, my_callback, my_arg);
3151 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
3152 /* For the meaning of a, b in calls to my_callback(), see the
3153 * documentation of the function that calls the callback.
3154 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
3155 * my_callback should return 1 if it wants BN_is_prime_ex()
3156 * to continue, or 0 to stop.
3161 *) Change the ZLIB compression method to be stateful, and make it
3162 available to TLS with the number defined in
3163 draft-ietf-tls-compression-04.txt.
3166 *) Add the ASN.1 structures and functions for CertificatePair, which
3167 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
3169 CertificatePair ::= SEQUENCE {
3170 forward [0] Certificate OPTIONAL,
3171 reverse [1] Certificate OPTIONAL,
3172 -- at least one of the pair shall be present -- }
3174 Also implement the PEM functions to read and write certificate
3175 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
3177 This needed to be defined, mostly for the sake of the LDAP
3178 attribute crossCertificatePair, but may prove useful elsewhere as
3182 *) Make it possible to inhibit symlinking of shared libraries in
3183 Makefile.shared, for Cygwin's sake.
3186 *) Extend the BIGNUM API by creating a function
3187 void BN_set_negative(BIGNUM *a, int neg);
3188 and a macro that behave like
3189 int BN_is_negative(const BIGNUM *a);
3191 to avoid the need to access 'a->neg' directly in applications.
3194 *) Implement fast modular reduction for pseudo-Mersenne primes
3195 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
3196 EC_GROUP_new_curve_GFp() will now automatically use this
3198 [Nils Larsch <nla@trustcenter.de>]
3200 *) Add new lock type (CRYPTO_LOCK_BN).
3203 *) Change the ENGINE framework to automatically load engines
3204 dynamically from specific directories unless they could be
3205 found to already be built in or loaded. Move all the
3206 current engines except for the cryptodev one to a new
3208 The engines in engines/ are built as shared libraries if
3209 the "shared" options was given to ./Configure or ./config.
3210 Otherwise, they are inserted in libcrypto.a.
3211 /usr/local/ssl/engines is the default directory for dynamic
3212 engines, but that can be overriden at configure time through
3213 the usual use of --prefix and/or --openssldir, and at run
3214 time with the environment variable OPENSSL_ENGINES.
3215 [Geoff Thorpe and Richard Levitte]
3217 *) Add Makefile.shared, a helper makefile to build shared
3218 libraries. Addapt Makefile.org.
3221 *) Add version info to Win32 DLLs.
3222 [Peter 'Luna' Runestig" <peter@runestig.com>]
3224 *) Add new 'medium level' PKCS#12 API. Certificates and keys
3225 can be added using this API to created arbitrary PKCS#12
3226 files while avoiding the low level API.
3228 New options to PKCS12_create(), key or cert can be NULL and
3229 will then be omitted from the output file. The encryption
3230 algorithm NIDs can be set to -1 for no encryption, the mac
3231 iteration count can be set to 0 to omit the mac.
3233 Enhance pkcs12 utility by making the -nokeys and -nocerts
3234 options work when creating a PKCS#12 file. New option -nomac
3235 to omit the mac, NONE can be set for an encryption algorithm.
3236 New code is modified to use the enhanced PKCS12_create()
3237 instead of the low level API.
3240 *) Extend ASN1 encoder to support indefinite length constructed
3241 encoding. This can output sequences tags and octet strings in
3242 this form. Modify pk7_asn1.c to support indefinite length
3243 encoding. This is experimental and needs additional code to
3244 be useful, such as an ASN1 bio and some enhanced streaming
3247 Extend template encode functionality so that tagging is passed
3248 down to the template encoder.
3251 *) Let 'openssl req' fail if an argument to '-newkey' is not
3252 recognized instead of using RSA as a default.
3255 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
3256 As these are not official, they are not included in "ALL";
3257 the "ECCdraft" ciphersuite group alias can be used to select them.
3258 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
3260 *) Add ECDH engine support.
3261 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
3263 *) Add ECDH in new directory crypto/ecdh/.
3264 [Douglas Stebila (Sun Microsystems Laboratories)]
3266 *) Let BN_rand_range() abort with an error after 100 iterations
3267 without success (which indicates a broken PRNG).
3270 *) Change BN_mod_sqrt() so that it verifies that the input value
3271 is really the square of the return value. (Previously,
3272 BN_mod_sqrt would show GIGO behaviour.)
3275 *) Add named elliptic curves over binary fields from X9.62, SECG,
3276 and WAP/WTLS; add OIDs that were still missing.
3278 [Sheueling Chang Shantz and Douglas Stebila
3279 (Sun Microsystems Laboratories)]
3281 *) Extend the EC library for elliptic curves over binary fields
3282 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
3285 EC_GF2m_simple_method
3289 EC_GROUP_new_curve_GF2m
3290 EC_GROUP_set_curve_GF2m
3291 EC_GROUP_get_curve_GF2m
3292 EC_POINT_set_affine_coordinates_GF2m
3293 EC_POINT_get_affine_coordinates_GF2m
3294 EC_POINT_set_compressed_coordinates_GF2m
3296 Point compression for binary fields is disabled by default for
3297 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
3300 As binary polynomials are represented as BIGNUMs, various members
3301 of the EC_GROUP and EC_POINT data structures can be shared
3302 between the implementations for prime fields and binary fields;
3303 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
3304 are essentially identical to their ..._GFp counterparts.
3305 (For simplicity, the '..._GFp' prefix has been dropped from
3306 various internal method names.)
3308 An internal 'field_div' method (similar to 'field_mul' and
3309 'field_sqr') has been added; this is used only for binary fields.
3311 [Sheueling Chang Shantz and Douglas Stebila
3312 (Sun Microsystems Laboratories)]
3314 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
3315 through methods ('mul', 'precompute_mult').
3317 The generic implementations (now internally called 'ec_wNAF_mul'
3318 and 'ec_wNAF_precomputed_mult') remain the default if these
3319 methods are undefined.
3321 [Sheueling Chang Shantz and Douglas Stebila
3322 (Sun Microsystems Laboratories)]
3324 *) New function EC_GROUP_get_degree, which is defined through
3325 EC_METHOD. For curves over prime fields, this returns the bit
3326 length of the modulus.
3328 [Sheueling Chang Shantz and Douglas Stebila
3329 (Sun Microsystems Laboratories)]
3331 *) New functions EC_GROUP_dup, EC_POINT_dup.
3332 (These simply call ..._new and ..._copy).
3334 [Sheueling Chang Shantz and Douglas Stebila
3335 (Sun Microsystems Laboratories)]
3337 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
3338 Polynomials are represented as BIGNUMs (where the sign bit is not
3339 used) in the following functions [macros]:
3342 BN_GF2m_sub [= BN_GF2m_add]
3343 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
3344 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
3345 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
3347 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
3348 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
3349 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
3350 BN_GF2m_cmp [= BN_ucmp]
3352 (Note that only the 'mod' functions are actually for fields GF(2^m).
3353 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
3355 For some functions, an the irreducible polynomial defining a
3356 field can be given as an 'unsigned int[]' with strictly
3357 decreasing elements giving the indices of those bits that are set;
3358 i.e., p[] represents the polynomial
3359 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
3361 p[0] > p[1] > ... > p[k] = 0.
3362 This applies to the following functions:
3367 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
3368 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
3370 BN_GF2m_mod_sqrt_arr
3371 BN_GF2m_mod_solve_quad_arr
3375 Conversion can be performed by the following functions:
3380 bntest.c has additional tests for binary polynomial arithmetic.
3382 Two implementations for BN_GF2m_mod_div() are available.
3383 The default algorithm simply uses BN_GF2m_mod_inv() and
3384 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
3385 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
3386 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
3388 [Sheueling Chang Shantz and Douglas Stebila
3389 (Sun Microsystems Laboratories)]
3391 *) Add new error code 'ERR_R_DISABLED' that can be used when some
3392 functionality is disabled at compile-time.
3393 [Douglas Stebila <douglas.stebila@sun.com>]
3395 *) Change default behaviour of 'openssl asn1parse' so that more
3396 information is visible when viewing, e.g., a certificate:
3398 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
3399 mode the content of non-printable OCTET STRINGs is output in a
3400 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
3401 avoid the appearance of a printable string.
3402 [Nils Larsch <nla@trustcenter.de>]
3404 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
3406 EC_GROUP_set_asn1_flag()
3407 EC_GROUP_get_asn1_flag()
3408 EC_GROUP_set_point_conversion_form()
3409 EC_GROUP_get_point_conversion_form()
3410 These control ASN1 encoding details:
3411 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
3412 has been set to OPENSSL_EC_NAMED_CURVE.
3413 - Points are encoded in uncompressed form by default; options for
3414 asn1_for are as for point2oct, namely
3415 POINT_CONVERSION_COMPRESSED
3416 POINT_CONVERSION_UNCOMPRESSED
3417 POINT_CONVERSION_HYBRID
3419 Also add 'seed' and 'seed_len' members to EC_GROUP with access
3422 EC_GROUP_get0_seed()
3423 EC_GROUP_get_seed_len()
3424 This is used only for ASN1 purposes (so far).
3425 [Nils Larsch <nla@trustcenter.de>]
3427 *) Add 'field_type' member to EC_METHOD, which holds the NID
3428 of the appropriate field type OID. The new function
3429 EC_METHOD_get_field_type() returns this value.
3430 [Nils Larsch <nla@trustcenter.de>]
3435 EC_POINT_point2hex()
3436 EC_POINT_hex2point()
3437 providing useful interfaces to EC_POINT_point2oct() and
3438 EC_POINT_oct2point().
3439 [Nils Larsch <nla@trustcenter.de>]
3441 *) Change internals of the EC library so that the functions
3442 EC_GROUP_set_generator()
3443 EC_GROUP_get_generator()
3444 EC_GROUP_get_order()
3445 EC_GROUP_get_cofactor()
3446 are implemented directly in crypto/ec/ec_lib.c and not dispatched
3447 to methods, which would lead to unnecessary code duplication when
3448 adding different types of curves.
3449 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
3451 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
3452 arithmetic, and such that modified wNAFs are generated
3453 (which avoid length expansion in many cases).
3456 *) Add a function EC_GROUP_check_discriminant() (defined via
3457 EC_METHOD) that verifies that the curve discriminant is non-zero.
3459 Add a function EC_GROUP_check() that makes some sanity tests
3460 on a EC_GROUP, its generator and order. This includes
3461 EC_GROUP_check_discriminant().
3462 [Nils Larsch <nla@trustcenter.de>]
3464 *) Add ECDSA in new directory crypto/ecdsa/.
3466 Add applications 'openssl ecparam' and 'openssl ecdsa'
3467 (these are based on 'openssl dsaparam' and 'openssl dsa').
3469 ECDSA support is also included in various other files across the
3470 library. Most notably,
3471 - 'openssl req' now has a '-newkey ecdsa:file' option;
3472 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
3473 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
3474 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
3475 them suitable for ECDSA where domain parameters must be
3476 extracted before the specific public key;
3477 - ECDSA engine support has been added.
3478 [Nils Larsch <nla@trustcenter.de>]
3480 *) Include some named elliptic curves, and add OIDs from X9.62,
3481 SECG, and WAP/WTLS. Each curve can be obtained from the new
3483 EC_GROUP_new_by_curve_name(),
3484 and the list of available named curves can be obtained with
3485 EC_get_builtin_curves().
3486 Also add a 'curve_name' member to EC_GROUP objects, which can be
3488 EC_GROUP_set_curve_name()
3489 EC_GROUP_get_curve_name()
3490 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
3492 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
3493 was actually never needed) and in BN_mul(). The removal in BN_mul()
3494 required a small change in bn_mul_part_recursive() and the addition
3495 of the functions bn_cmp_part_words(), bn_sub_part_words() and
3496 bn_add_part_words(), which do the same thing as bn_cmp_words(),
3497 bn_sub_words() and bn_add_words() except they take arrays with
3501 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
3503 *) Cleanse PEM buffers before freeing them since they may contain
3505 [Benjamin Bennett <ben@psc.edu>]
3507 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3508 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3509 authentication-only ciphersuites.
3512 *) Since AES128 and AES256 share a single mask bit in the logic of
3513 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3514 kludge to work properly if AES128 is available and AES256 isn't.
3517 *) Expand security boundary to match 1.1.1 module.
3520 *) Remove redundant features: hash file source, editing of test vectors
3521 modify fipsld to use external fips_premain.c signature.
3524 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
3525 run algorithm test programs.
3528 *) Make algorithm test programs more tolerant of whitespace.
3531 *) Have SSL/TLS server implementation tolerate "mismatched" record
3532 protocol version while receiving ClientHello even if the
3533 ClientHello is fragmented. (The server can't insist on the
3534 particular protocol version it has chosen before the ServerHello
3535 message has informed the client about his choice.)
3538 *) Load error codes if they are not already present instead of using a
3539 static variable. This allows them to be cleanly unloaded and reloaded.
3542 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
3544 *) Introduce limits to prevent malicious keys being able to
3545 cause a denial of service. (CVE-2006-2940)
3546 [Steve Henson, Bodo Moeller]
3548 *) Fix ASN.1 parsing of certain invalid structures that can result
3549 in a denial of service. (CVE-2006-2937) [Steve Henson]
3551 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3552 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3554 *) Fix SSL client code which could crash if connecting to a
3555 malicious SSLv2 server. (CVE-2006-4343)
3556 [Tavis Ormandy and Will Drewry, Google Security Team]
3558 *) Change ciphersuite string processing so that an explicit
3559 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
3560 will no longer include "AES128-SHA"), and any other similar
3561 ciphersuite (same bitmap) from *other* protocol versions (so that
3562 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
3563 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
3564 changes from 0.9.8b and 0.9.8d.
3567 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
3569 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3570 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3572 *) Change the Unix randomness entropy gathering to use poll() when
3573 possible instead of select(), since the latter has some
3574 undesirable limitations.
3575 [Darryl Miles via Richard Levitte and Bodo Moeller]
3577 *) Disable rogue ciphersuites:
3579 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3580 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3581 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3583 The latter two were purportedly from
3584 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3587 Also deactive the remaining ciphersuites from
3588 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3589 unofficial, and the ID has long expired.
3592 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3593 dual-core machines) and other potential thread-safety issues.
3596 Changes between 0.9.7i and 0.9.7j [04 May 2006]
3598 *) Adapt fipsld and the build system to link against the validated FIPS
3599 module in FIPS mode.
3602 *) Fixes for VC++ 2005 build under Windows.
3605 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
3606 from a Windows bash shell such as MSYS. It is autodetected from the
3607 "config" script when run from a VC++ environment. Modify standard VC++
3608 build to use fipscanister.o from the GNU make build.
3611 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
3613 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
3614 The value now differs depending on if you build for FIPS or not.
3615 BEWARE! A program linked with a shared FIPSed libcrypto can't be
3616 safely run with a non-FIPSed libcrypto, as it may crash because of
3617 the difference induced by this change.
3620 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
3622 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3623 (part of SSL_OP_ALL). This option used to disable the
3624 countermeasure against man-in-the-middle protocol-version
3625 rollback in the SSL 2.0 server implementation, which is a bad
3626 idea. (CVE-2005-2969)
3628 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3629 for Information Security, National Institute of Advanced Industrial
3630 Science and Technology [AIST], Japan)]
3632 *) Minimal support for X9.31 signatures and PSS padding modes. This is
3633 mainly for FIPS compliance and not fully integrated at this stage.
3636 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
3637 the exponentiation using a fixed-length exponent. (Otherwise,
3638 the information leaked through timing could expose the secret key
3639 after many signatures; cf. Bleichenbacher's attack on DSA with
3643 *) Make a new fixed-window mod_exp implementation the default for
3644 RSA, DSA, and DH private-key operations so that the sequence of
3645 squares and multiplies and the memory access pattern are
3646 independent of the particular secret key. This will mitigate
3647 cache-timing and potential related attacks.
3649 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
3650 and this is automatically used by BN_mod_exp_mont() if the new flag
3651 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
3652 will use this BN flag for private exponents unless the flag
3653 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
3654 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
3656 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
3658 *) Change the client implementation for SSLv23_method() and
3659 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
3660 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
3661 (Previously, the SSL 2.0 backwards compatible Client Hello
3662 message format would be used even with SSL_OP_NO_SSLv2.)
3665 *) Add support for smime-type MIME parameter in S/MIME messages which some
3669 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
3670 a threadsafe manner. Modify rsa code to use new function and add calls
3671 to dsa and dh code (which had race conditions before).
3674 *) Include the fixed error library code in the C error file definitions
3675 instead of fixing them up at runtime. This keeps the error code
3676 structures constant.
3679 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
3681 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
3684 *) Fixes for newer kerberos headers. NB: the casts are needed because
3685 the 'length' field is signed on one version and unsigned on another
3686 with no (?) obvious way to tell the difference, without these VC++
3687 complains. Also the "definition" of FAR (blank) is no longer included
3688 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
3689 some needed definitions.
3692 *) Undo Cygwin change.
3695 *) Added support for proxy certificates according to RFC 3820.
3696 Because they may be a security thread to unaware applications,
3697 they must be explicitely allowed in run-time. See
3698 docs/HOWTO/proxy_certificates.txt for further information.
3701 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
3703 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
3704 server and client random values. Previously
3705 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
3706 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
3708 This change has negligible security impact because:
3710 1. Server and client random values still have 24 bytes of pseudo random
3713 2. Server and client random values are sent in the clear in the initial
3716 3. The master secret is derived using the premaster secret (48 bytes in
3717 size for static RSA ciphersuites) as well as client server and random
3720 The OpenSSL team would like to thank the UK NISCC for bringing this issue
3723 [Stephen Henson, reported by UK NISCC]
3725 *) Use Windows randomness collection on Cygwin.
3728 *) Fix hang in EGD/PRNGD query when communication socket is closed
3729 prematurely by EGD/PRNGD.
3730 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
3732 *) Prompt for pass phrases when appropriate for PKCS12 input format.
3735 *) Back-port of selected performance improvements from development
3736 branch, as well as improved support for PowerPC platforms.
3739 *) Add lots of checks for memory allocation failure, error codes to indicate
3740 failure and freeing up memory if a failure occurs.
3741 [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
3743 *) Add new -passin argument to dgst.
3746 *) Perform some character comparisons of different types in X509_NAME_cmp:
3747 this is needed for some certificates that reencode DNs into UTF8Strings
3748 (in violation of RFC3280) and can't or wont issue name rollover
3752 *) Make an explicit check during certificate validation to see that
3753 the CA setting in each certificate on the chain is correct. As a
3754 side effect always do the following basic checks on extensions,
3755 not just when there's an associated purpose to the check:
3757 - if there is an unhandled critical extension (unless the user
3758 has chosen to ignore this fault)
3759 - if the path length has been exceeded (if one is set at all)
3760 - that certain extensions fit the associated purpose (if one has
3764 Changes between 0.9.7d and 0.9.7e [25 Oct 2004]
3766 *) Avoid a race condition when CRLs are checked in a multi threaded
3767 environment. This would happen due to the reordering of the revoked
3768 entries during signature checking and serial number lookup. Now the
3769 encoding is cached and the serial number sort performed under a lock.
3770 Add new STACK function sk_is_sorted().
3773 *) Add Delta CRL to the extension code.
3776 *) Various fixes to s3_pkt.c so alerts are sent properly.
3777 [David Holmes <d.holmes@f5.com>]
3779 *) Reduce the chances of duplicate issuer name and serial numbers (in
3780 violation of RFC3280) using the OpenSSL certificate creation utilities.
3781 This is done by creating a random 64 bit value for the initial serial
3782 number when a serial number file is created or when a self signed
3783 certificate is created using 'openssl req -x509'. The initial serial
3784 number file is created using 'openssl x509 -next_serial' in CA.pl
3785 rather than being initialized to 1.
3788 Changes between 0.9.7c and 0.9.7d [17 Mar 2004]
3790 *) Fix null-pointer assignment in do_change_cipher_spec() revealed
3791 by using the Codenomicon TLS Test Tool (CVE-2004-0079)
3792 [Joe Orton, Steve Henson]
3794 *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
3796 [Joe Orton, Steve Henson]
3798 *) Make it possible to have multiple active certificates with the same
3799 subject in the CA index file. This is done only if the keyword
3800 'unique_subject' is set to 'no' in the main CA section (default
3801 if 'CA_default') of the configuration file. The value is saved
3802 with the database itself in a separate index attribute file,
3803 named like the index file with '.attr' appended to the name.
3806 *) X509 verify fixes. Disable broken certificate workarounds when
3807 X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
3808 keyUsage extension present. Don't accept CRLs with unhandled critical
3809 extensions: since verify currently doesn't process CRL extensions this
3810 rejects a CRL with *any* critical extensions. Add new verify error codes
3814 *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
3815 A clarification of RFC2560 will require the use of OCTET STRINGs and
3816 some implementations cannot handle the current raw format. Since OpenSSL
3817 copies and compares OCSP nonces as opaque blobs without any attempt at
3818 parsing them this should not create any compatibility issues.
3821 *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
3822 calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
3823 this HMAC (and other) operations are several times slower than OpenSSL
3827 *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
3828 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3830 *) Use the correct content when signing type "other".
3833 Changes between 0.9.7b and 0.9.7c [30 Sep 2003]
3835 *) Fix various bugs revealed by running the NISCC test suite:
3837 Stop out of bounds reads in the ASN1 code when presented with
3838 invalid tags (CVE-2003-0543 and CVE-2003-0544).
3840 Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
3842 If verify callback ignores invalid public key errors don't try to check
3843 certificate signature with the NULL public key.
3847 *) New -ignore_err option in ocsp application to stop the server
3848 exiting on the first error in a request.
3851 *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
3852 if the server requested one: as stated in TLS 1.0 and SSL 3.0
3856 *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
3857 extra data after the compression methods not only for TLS 1.0
3858 but also for SSL 3.0 (as required by the specification).
3859 [Bodo Moeller; problem pointed out by Matthias Loepfe]
3861 *) Change X509_certificate_type() to mark the key as exported/exportable
3862 when it's 512 *bits* long, not 512 bytes.
3865 *) Change AES_cbc_encrypt() so it outputs exact multiple of
3866 blocks during encryption.
3869 *) Various fixes to base64 BIO and non blocking I/O. On write
3870 flushes were not handled properly if the BIO retried. On read
3871 data was not being buffered properly and had various logic bugs.
3872 This also affects blocking I/O when the data being decoded is a
3876 *) Various S/MIME bugfixes and compatibility changes:
3877 output correct application/pkcs7 MIME type if
3878 PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
3879 Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
3880 of files as .eml work). Correctly handle very long lines in MIME
3884 Changes between 0.9.7a and 0.9.7b [10 Apr 2003]
3886 *) Countermeasure against the Klima-Pokorny-Rosa extension of
3887 Bleichbacher's attack on PKCS #1 v1.5 padding: treat
3888 a protocol version number mismatch like a decryption error
3889 in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
3892 *) Turn on RSA blinding by default in the default implementation
3893 to avoid a timing attack. Applications that don't want it can call
3894 RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
3895 They would be ill-advised to do so in most cases.
3896 [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
3898 *) Change RSA blinding code so that it works when the PRNG is not
3899 seeded (in this case, the secret RSA exponent is abused as
3900 an unpredictable seed -- if it is not unpredictable, there
3901 is no point in blinding anyway). Make RSA blinding thread-safe
3902 by remembering the creator's thread ID in rsa->blinding and
3903 having all other threads use local one-time blinding factors
3904 (this requires more computation than sharing rsa->blinding, but
3905 avoids excessive locking; and if an RSA object is not shared
3906 between threads, blinding will still be very fast).
3909 *) Fixed a typo bug that would cause ENGINE_set_default() to set an
3910 ENGINE as defaults for all supported algorithms irrespective of
3911 the 'flags' parameter. 'flags' is now honoured, so applications
3912 should make sure they are passing it correctly.
3915 *) Target "mingw" now allows native Windows code to be generated in
3916 the Cygwin environment as well as with the MinGW compiler.
3919 Changes between 0.9.7 and 0.9.7a [19 Feb 2003]
3921 *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
3922 via timing by performing a MAC computation even if incorrrect
3923 block cipher padding has been found. This is a countermeasure
3924 against active attacks where the attacker has to distinguish
3925 between bad padding and a MAC verification error. (CVE-2003-0078)
3927 [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
3928 Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
3929 Martin Vuagnoux (EPFL, Ilion)]
3931 *) Make the no-err option work as intended. The intention with no-err
3932 is not to have the whole error stack handling routines removed from
3933 libcrypto, it's only intended to remove all the function name and
3934 reason texts, thereby removing some of the footprint that may not
3935 be interesting if those errors aren't displayed anyway.
3937 NOTE: it's still possible for any application or module to have it's
3938 own set of error texts inserted. The routines are there, just not
3939 used by default when no-err is given.
3942 *) Add support for FreeBSD on IA64.
3943 [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
3945 *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
3946 Kerberos function mit_des_cbc_cksum(). Before this change,
3947 the value returned by DES_cbc_cksum() was like the one from
3948 mit_des_cbc_cksum(), except the bytes were swapped.
3949 [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
3951 *) Allow an application to disable the automatic SSL chain building.
3952 Before this a rather primitive chain build was always performed in
3953 ssl3_output_cert_chain(): an application had no way to send the
3954 correct chain if the automatic operation produced an incorrect result.
3956 Now the chain builder is disabled if either:
3958 1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
3960 2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
3962 The reasoning behind this is that an application would not want the
3963 auto chain building to take place if extra chain certificates are
3964 present and it might also want a means of sending no additional
3965 certificates (for example the chain has two certificates and the
3969 *) Add the possibility to build without the ENGINE framework.
3970 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3972 *) Under Win32 gmtime() can return NULL: check return value in
3973 OPENSSL_gmtime(). Add error code for case where gmtime() fails.
3976 *) DSA routines: under certain error conditions uninitialized BN objects
3977 could be freed. Solution: make sure initialization is performed early
3978 enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
3979 Nils Larsch <nla@trustcenter.de> via PR#459)
3982 *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
3983 checked on reconnect on the client side, therefore session resumption
3984 could still fail with a "ssl session id is different" error. This
3985 behaviour is masked when SSL_OP_ALL is used due to
3986 SSL_OP_MICROSOFT_SESS_ID_BUG being set.
3987 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3988 followup to PR #377.
3991 *) IA-32 assembler support enhancements: unified ELF targets, support
3992 for SCO/Caldera platforms, fix for Cygwin shared build.
3995 *) Add support for FreeBSD on sparc64. As a consequence, support for
3996 FreeBSD on non-x86 processors is separate from x86 processors on
3997 the config script, much like the NetBSD support.
3998 [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
4000 Changes between 0.9.6h and 0.9.7 [31 Dec 2002]
4002 [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
4005 *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
4006 code (06) was taken as the first octet of the session ID and the last
4007 octet was ignored consequently. As a result SSLv2 client side session
4008 caching could not have worked due to the session ID mismatch between
4010 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
4014 *) Change the declaration of needed Kerberos libraries to use EX_LIBS
4015 instead of the special (and badly supported) LIBKRB5. LIBKRB5 is
4019 *) The hw_ncipher.c engine requires dynamic locks. Unfortunately, it
4020 seems that in spite of existing for more than a year, many application
4021 author have done nothing to provide the necessary callbacks, which
4022 means that this particular engine will not work properly anywhere.
4023 This is a very unfortunate situation which forces us, in the name
4024 of usability, to give the hw_ncipher.c a static lock, which is part
4026 NOTE: This is for the 0.9.7 series ONLY. This hack will never
4027 appear in 0.9.8 or later. We EXPECT application authors to have
4028 dealt properly with this when 0.9.8 is released (unless we actually
4029 make such changes in the libcrypto locking code that changes will
4030 have to be made anyway).
4033 *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
4034 octets have been read, EOF or an error occurs. Without this change
4035 some truncated ASN1 structures will not produce an error.
4038 *) Disable Heimdal support, since it hasn't been fully implemented.
4039 Still give the possibility to force the use of Heimdal, but with
4040 warnings and a request that patches get sent to openssl-dev.
4043 *) Add the VC-CE target, introduce the WINCE sysname, and add
4044 INSTALL.WCE and appropriate conditionals to make it build.
4045 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
4047 *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
4048 cygssl-x.y.z.dll, where x, y and z are the major, minor and
4049 edit numbers of the version.
4050 [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
4052 *) Introduce safe string copy and catenation functions
4053 (BUF_strlcpy() and BUF_strlcat()).
4054 [Ben Laurie (CHATS) and Richard Levitte]
4056 *) Avoid using fixed-size buffers for one-line DNs.
4057 [Ben Laurie (CHATS)]
4059 *) Add BUF_MEM_grow_clean() to avoid information leakage when
4060 resizing buffers containing secrets, and use where appropriate.
4061 [Ben Laurie (CHATS)]
4063 *) Avoid using fixed size buffers for configuration file location.
4064 [Ben Laurie (CHATS)]
4066 *) Avoid filename truncation for various CA files.
4067 [Ben Laurie (CHATS)]
4069 *) Use sizeof in preference to magic numbers.
4070 [Ben Laurie (CHATS)]
4072 *) Avoid filename truncation in cert requests.
4073 [Ben Laurie (CHATS)]
4075 *) Add assertions to check for (supposedly impossible) buffer
4077 [Ben Laurie (CHATS)]
4079 *) Don't cache truncated DNS entries in the local cache (this could
4080 potentially lead to a spoofing attack).
4081 [Ben Laurie (CHATS)]
4083 *) Fix various buffers to be large enough for hex/decimal
4084 representations in a platform independent manner.
4085 [Ben Laurie (CHATS)]
4087 *) Add CRYPTO_realloc_clean() to avoid information leakage when
4088 resizing buffers containing secrets, and use where appropriate.
4089 [Ben Laurie (CHATS)]
4091 *) Add BIO_indent() to avoid much slightly worrying code to do
4093 [Ben Laurie (CHATS)]
4095 *) Convert sprintf()/BIO_puts() to BIO_printf().
4096 [Ben Laurie (CHATS)]
4098 *) buffer_gets() could terminate with the buffer only half
4100 [Ben Laurie (CHATS)]
4102 *) Add assertions to prevent user-supplied crypto functions from
4103 overflowing internal buffers by having large block sizes, etc.
4104 [Ben Laurie (CHATS)]
4106 *) New OPENSSL_assert() macro (similar to assert(), but enabled
4108 [Ben Laurie (CHATS)]
4110 *) Eliminate unused copy of key in RC4.
4111 [Ben Laurie (CHATS)]
4113 *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
4114 [Ben Laurie (CHATS)]
4116 *) Fix off-by-one error in EGD path.
4117 [Ben Laurie (CHATS)]
4119 *) If RANDFILE path is too long, ignore instead of truncating.
4120 [Ben Laurie (CHATS)]
4122 *) Eliminate unused and incorrectly sized X.509 structure
4124 [Ben Laurie (CHATS)]
4126 *) Eliminate unused and dangerous function knumber().
4127 [Ben Laurie (CHATS)]
4129 *) Eliminate unused and dangerous structure, KSSL_ERR.
4130 [Ben Laurie (CHATS)]
4132 *) Protect against overlong session ID context length in an encoded
4133 session object. Since these are local, this does not appear to be
4135 [Ben Laurie (CHATS)]
4137 *) Change from security patch (see 0.9.6e below) that did not affect
4138 the 0.9.6 release series:
4140 Remote buffer overflow in SSL3 protocol - an attacker could
4141 supply an oversized master key in Kerberos-enabled versions.
4143 [Ben Laurie (CHATS)]
4145 *) Change the SSL kerb5 codes to match RFC 2712.
4148 *) Make -nameopt work fully for req and add -reqopt switch.
4149 [Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]
4151 *) The "block size" for block ciphers in CFB and OFB mode should be 1.
4152 [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]
4154 *) Make sure tests can be performed even if the corresponding algorithms
4155 have been removed entirely. This was also the last step to make
4156 OpenSSL compilable with DJGPP under all reasonable conditions.
4157 [Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
4159 *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
4160 to allow version independent disabling of normally unselected ciphers,
4161 which may be activated as a side-effect of selecting a single cipher.
4163 (E.g., cipher list string "RSA" enables ciphersuites that are left
4164 out of "ALL" because they do not provide symmetric encryption.
4165 "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
4166 [Lutz Jaenicke, Bodo Moeller]
4168 *) Add appropriate support for separate platform-dependent build
4169 directories. The recommended way to make a platform-dependent
4170 build directory is the following (tested on Linux), maybe with
4173 # Place yourself outside of the OpenSSL source tree. In
4174 # this example, the environment variable OPENSSL_SOURCE
4175 # is assumed to contain the absolute OpenSSL source directory.
4176 mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
4177 cd objtree/"`uname -s`-`uname -r`-`uname -m`"
4178 (cd $OPENSSL_SOURCE; find . -type f) | while read F; do
4179 mkdir -p `dirname $F`
4180 ln -s $OPENSSL_SOURCE/$F $F
4183 To be absolutely sure not to disturb the source tree, a "make clean"
4184 is a good thing. If it isn't successfull, don't worry about it,
4185 it probably means the source directory is very clean.
4188 *) Make sure any ENGINE control commands make local copies of string
4189 pointers passed to them whenever necessary. Otherwise it is possible
4190 the caller may have overwritten (or deallocated) the original string
4191 data when a later ENGINE operation tries to use the stored values.
4192 [Götz Babin-Ebell <babinebell@trustcenter.de>]
4194 *) Improve diagnostics in file reading and command-line digests.
4195 [Ben Laurie aided and abetted by Solar Designer <solar@openwall.com>]
4197 *) Add AES modes CFB and OFB to the object database. Correct an
4198 error in AES-CFB decryption.
4201 *) Remove most calls to EVP_CIPHER_CTX_cleanup() in evp_enc.c, this
4202 allows existing EVP_CIPHER_CTX structures to be reused after
4203 calling EVP_*Final(). This behaviour is used by encryption
4204 BIOs and some applications. This has the side effect that
4205 applications must explicitly clean up cipher contexts with
4206 EVP_CIPHER_CTX_cleanup() or they will leak memory.
4209 *) Check the values of dna and dnb in bn_mul_recursive before calling
4210 bn_mul_comba (a non zero value means the a or b arrays do not contain
4211 n2 elements) and fallback to bn_mul_normal if either is not zero.
4214 *) Fix escaping of non-ASCII characters when using the -subj option
4215 of the "openssl req" command line tool. (Robert Joop <joop@fokus.gmd.de>)
4218 *) Make object definitions compliant to LDAP (RFC2256): SN is the short
4219 form for "surname", serialNumber has no short form.
4220 Use "mail" as the short name for "rfc822Mailbox" according to RFC2798;
4221 therefore remove "mail" short name for "internet 7".
4222 The OID for unique identifiers in X509 certificates is
4223 x500UniqueIdentifier, not uniqueIdentifier.
4224 Some more OID additions. (Michael Bell <michael.bell@rz.hu-berlin.de>)
4227 *) Add an "init" command to the ENGINE config module and auto initialize
4228 ENGINEs. Without any "init" command the ENGINE will be initialized
4229 after all ctrl commands have been executed on it. If init=1 the
4230 ENGINE is initailized at that point (ctrls before that point are run
4231 on the uninitialized ENGINE and after on the initialized one). If
4232 init=0 then the ENGINE will not be iniatialized at all.
4235 *) Fix the 'app_verify_callback' interface so that the user-defined
4236 argument is actually passed to the callback: In the
4237 SSL_CTX_set_cert_verify_callback() prototype, the callback
4238 declaration has been changed from
4241 int (*cb)(X509_STORE_CTX *,void *);
4242 in ssl_verify_cert_chain (ssl/ssl_cert.c), the call
4243 i=s->ctx->app_verify_callback(&ctx)
4244 has been changed into
4245 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg).
4247 To update applications using SSL_CTX_set_cert_verify_callback(),
4248 a dummy argument can be added to their callback functions.
4249 [D. K. Smetters <smetters@parc.xerox.com>]
4251 *) Added the '4758cca' ENGINE to support IBM 4758 cards.
4252 [Maurice Gittens <maurice@gittens.nl>, touchups by Geoff Thorpe]
4254 *) Add and OPENSSL_LOAD_CONF define which will cause
4255 OpenSSL_add_all_algorithms() to load the openssl.cnf config file.
4256 This allows older applications to transparently support certain
4257 OpenSSL features: such as crypto acceleration and dynamic ENGINE loading.
4258 Two new functions OPENSSL_add_all_algorithms_noconf() which will never
4259 load the config file and OPENSSL_add_all_algorithms_conf() which will
4260 always load it have also been added.
4263 *) Add the OFB, CFB and CTR (all with 128 bit feedback) to AES.
4264 Adjust NIDs and EVP layer.
4265 [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]
4267 *) Config modules support in openssl utility.
4269 Most commands now load modules from the config file,
4270 though in a few (such as version) this isn't done
4271 because it couldn't be used for anything.
4273 In the case of ca and req the config file used is
4274 the same as the utility itself: that is the -config
projects / openssl.git / blob