5 Changes between 1.0.1 and 1.1.0 [xx XXX xxxx]
7 *) Support for automatic EC temporary key parameter selection. If enabled
8 the most preferred EC parameters are automatically used instead of
9 hardcoded fixed parameters. Now a server just has to call:
10 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
11 support ECDH and use the most appropriate parameters.
14 *) Enhance and tidy EC curve and point format TLS extension code. Use
15 static structures instead of allocation if default values are used.
16 New ctrls to set curves we wish to support and to retrieve shared curves.
17 Print out shared curves in s_server. New options to s_server and s_client
18 to set list of supported curves.
21 *) New ctrls to retrieve supported signature algorithms and
22 supported curve values as an array of NIDs. Extend openssl utility
23 to print out received values.
26 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
27 between NIDs and the more common NIST names such as "P-256". Enhance
28 ecparam utility and ECC method to recognise the NIST names for curves.
31 *) Enhance SSL/TLS certificate chain handling to support different
32 chains for each certificate instead of one chain in the parent SSL_CTX.
35 *) Support for fixed DH ciphersuite client authentication: where both
36 server and client use DH certificates with common parameters.
39 *) Support for fixed DH ciphersuites: those requiring DH server
43 *) Transparently support X9.42 DH parameters when calling
44 PEM_read_bio_DHparameters. This means existing applications can handle
45 the new parameter format automatically.
48 *) Initial experimental support for X9.42 DH parameter format: mainly
49 to support use of 'q' parameter for RFC5114 parameters.
52 *) Add DH parameters from RFC5114 including test data to dhtest.
55 *) Update fips_test_suite to support multiple command line options. New
56 test to induce all self test errors in sequence and check expected
60 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
61 sign or verify all in one operation.
64 *) Add fips_algvs: a multicall fips utility incorporaing all the algorithm
65 test programs and fips_test_suite. Includes functionality to parse
66 the minimal script output of fipsalgest.pl directly.
69 *) Add authorisation parameter to FIPS_module_mode_set().
72 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
75 *) Use separate DRBG fields for internal and external flags. New function
76 FIPS_drbg_health_check() to perform on demand health checking. Add
77 generation tests to fips_test_suite with reduced health check interval to
78 demonstrate periodic health checking. Add "nodh" option to
79 fips_test_suite to skip very slow DH test.
82 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
86 *) More extensive health check for DRBG checking many more failure modes.
87 New function FIPS_selftest_drbg_all() to handle every possible DRBG
88 combination: call this in fips_test_suite.
91 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
92 and POST to handle Dual EC cases.
95 *) Add support for canonical generation of DSA parameter 'g'. See
98 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
99 POST to handle HMAC cases.
102 *) Add functions FIPS_module_version() and FIPS_module_version_text()
103 to return numberical and string versions of the FIPS module number.
106 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
107 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implmeneted
108 outside the validated module in the FIPS capable OpenSSL.
111 *) Minor change to DRBG entropy callback semantics. In some cases
112 there is no mutiple of the block length between min_len and
113 max_len. Allow the callback to return more than max_len bytes
114 of entropy but discard any extra: it is the callback's responsibility
115 to ensure that the extra data discarded does not impact the
116 requested amount of entropy.
119 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
120 information in FIPS186-3, SP800-57 and SP800-131A.
123 *) CCM support via EVP. Interface is very similar to GCM case except we
124 must supply all data in one chunk (i.e. no update, final) and the
125 message length must be supplied if AAD is used. Add algorithm test
129 *) Initial version of POST overhaul. Add POST callback to allow the status
130 of POST to be monitored and/or failures induced. Modify fips_test_suite
131 to use callback. Always run all selftests even if one fails.
134 *) XTS support including algorithm test driver in the fips_gcmtest program.
135 Note: this does increase the maximum key length from 32 to 64 bytes but
136 there should be no binary compatibility issues as existing applications
137 will never use XTS mode.
140 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
141 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
142 performs algorithm blocking for unapproved PRNG types. Also do not
143 set PRNG type in FIPS_mode_set(): leave this to the application.
144 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
145 the standard OpenSSL PRNG: set additional data to a date time vector.
148 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
149 This shouldn't present any incompatibility problems because applications
150 shouldn't be using these directly and any that are will need to rethink
151 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
154 *) Extensive self tests and health checking required by SP800-90 DRBG.
155 Remove strength parameter from FIPS_drbg_instantiate and always
156 instantiate at maximum supported strength.
159 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
162 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
165 *) New function DH_compute_key_padded() to compute a DH key and pad with
166 leading zeroes if needed: this complies with SP800-56A et al.
169 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
170 anything, incomplete, subject to change and largely untested at present.
173 *) Modify fipscanisteronly build option to only build the necessary object
174 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
177 *) Add experimental option FIPSSYMS to give all symbols in
178 fipscanister.o and FIPS or fips prefix. This will avoid
179 conflicts with future versions of OpenSSL. Add perl script
180 util/fipsas.pl to preprocess assembly language source files
181 and rename any affected symbols.
184 *) Add selftest checks and algorithm block of non-fips algorithms in
185 FIPS mode. Remove DES2 from selftests.
188 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
189 return internal method without any ENGINE dependencies. Add new
190 tiny fips sign and verify functions.
193 *) New build option no-ec2m to disable characteristic 2 code.
196 *) New build option "fipscanisteronly". This only builds fipscanister.o
197 and (currently) associated fips utilities. Uses the file Makefile.fips
198 instead of Makefile.org as the prototype.
201 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
202 Update fips_gcmtest to use IV generator.
205 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
206 setting output buffer to NULL. The *Final function must be
207 called although it will not retrieve any additional data. The tag
208 can be set or retrieved with a ctrl. The IV length is by default 12
209 bytes (96 bits) but can be set to an alternative value. If the IV
210 length exceeds the maximum IV length (currently 16 bytes) it cannot be
214 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
215 underlying do_cipher function handles all cipher semantics itself
216 including padding and finalisation. This is useful if (for example)
217 an ENGINE cipher handles block padding itself. The behaviour of
218 do_cipher is subtly changed if this flag is set: the return value
219 is the number of characters written to the output buffer (zero is
220 no longer an error code) or a negative error code. Also if the
221 input buffer is NULL and length 0 finalisation should be performed.
224 *) If a candidate issuer certificate is already part of the constructed
225 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
228 *) Improve forward-security support: add functions
230 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
231 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
233 for use by SSL/TLS servers; the callback function will be called whenever a
234 new session is created, and gets to decide whether the session may be
235 cached to make it resumable (return 0) or not (return 1). (As by the
236 SSL/TLS protocol specifications, the session_id sent by the server will be
237 empty to indicate that the session is not resumable; also, the server will
238 not generate RFC 4507 (RFC 5077) session tickets.)
240 A simple reasonable callback implementation is to return is_forward_secure.
241 This parameter will be set to 1 or 0 depending on the ciphersuite selected
242 by the SSL/TLS server library, indicating whether it can provide forward
244 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
246 *) New function OPENSSL_gmtime_diff to find the difference in days
247 and seconds between two tm structures. This will be used to provide
248 additional functionality for ASN1_TIME.
251 *) Add -trusted_first option which attempts to find certificates in the
252 trusted store even if an untrusted chain is also supplied.
255 *) Initial experimental support for explicitly trusted non-root CAs.
256 OpenSSL still tries to build a complete chain to a root but if an
257 intermediate CA has a trust setting included that is used. The first
258 setting is used: whether to trust or reject.
261 *) New -verify_name option in command line utilities to set verification
265 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
266 Add CMAC pkey methods.
269 *) Experimental regnegotiation in s_server -www mode. If the client
270 browses /reneg connection is renegotiated. If /renegcert it is
271 renegotiated requesting a certificate.
274 *) Add an "external" session cache for debugging purposes to s_server. This
275 should help trace issues which normally are only apparent in deployed
276 multi-process servers.
279 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
280 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
281 BIO_set_cipher() and some obscure PEM functions were changed so they
282 can now return an error. The RAND changes required a change to the
283 RAND_METHOD structure.
286 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
287 a gcc attribute to warn if the result of a function is ignored. This
288 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
289 whose return value is often ignored.
293 Changes between 1.0.1b and 1.0.1c [xx XXX xxxx]
295 *) In FIPS mode don't try to use composite ciphers as they are not
299 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
301 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
302 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
303 mean any application compiled against OpenSSL 1.0.0 headers setting
304 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
305 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
306 0x10000000L Any application which was previously compiled against
307 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
308 will need to be recompiled as a result. Letting be results in
309 inability to disable specifically TLS 1.1 and in client context,
310 in unlike event, limit maximum offered version to TLS 1.0 [see below].
313 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
314 disable just protocol X, but all protocols above X *if* there are
315 protocols *below* X still enabled. In more practical terms it means
316 that if application wants to disable TLS1.0 in favor of TLS1.1 and
317 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
318 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
322 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
324 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
325 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
326 in CRYPTO_realloc_clean.
328 Thanks to Tavis Ormandy, Google Security Team, for discovering this
329 issue and to Adam Langley <agl@chromium.org> for fixing it.
331 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
333 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
336 *) Workarounds for some broken servers that "hang" if a client hello
337 record length exceeds 255 bytes:
339 1. Do not use record version number > TLS 1.0 in initial client
340 hello: some (but not all) hanging servers will now work.
341 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
342 the number of ciphers sent in the client hello. This should be
343 set to an even number, such as 50, for example by passing:
344 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
345 Most broken servers should now work.
346 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
347 TLS 1.2 client support entirely.
350 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
353 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
355 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
356 STRING form instead of a DigestInfo.
359 *) The format used for MDC2 RSA signatures is inconsistent between EVP
360 and the RSA_sign/RSA_verify functions. This was made more apparent when
361 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
362 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
363 the correct format in RSA_verify so both forms transparently work.
366 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
367 STRING form instead of a DigestInfo.
370 *) Some servers which support TLS 1.0 can choke if we initially indicate
371 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
372 encrypted premaster secret. As a workaround use the maximum pemitted
373 client version in client hello, this should keep such servers happy
374 and still work with previous versions of OpenSSL.
377 *) Add support for TLS/DTLS heartbeats.
378 [Robin Seggelmann <seggelmann@fh-muenster.de>]
380 *) Add support for SCTP.
381 [Robin Seggelmann <seggelmann@fh-muenster.de>]
383 *) Improved PRNG seeding for VOS.
384 [Paul Green <Paul.Green@stratus.com>]
386 *) Extensive assembler packs updates, most notably:
388 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
389 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
390 - x86_64: bit-sliced AES implementation;
391 - ARM: NEON support, contemporary platforms optimizations;
392 - s390x: z196 support;
393 - *: GHASH and GF(2^m) multiplication implementations;
397 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
398 (removal of unnecessary code)
399 [Peter Sylvester <peter.sylvester@edelweb.fr>]
401 *) Add TLS key material exporter from RFC 5705.
404 *) Add DTLS-SRTP negotiation from RFC 5764.
407 *) Add Next Protocol Negotiation,
408 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
409 disabled with a no-npn flag to config or Configure. Code donated
411 [Adam Langley <agl@google.com> and Ben Laurie]
413 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
414 NIST-P256, NIST-P521, with constant-time single point multiplication on
415 typical inputs. Compiler support for the nonstandard type __uint128_t is
416 required to use this (present in gcc 4.4 and later, for 64-bit builds).
417 Code made available under Apache License version 2.0.
419 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
420 line to include this in your build of OpenSSL, and run "make depend" (or
421 "make update"). This enables the following EC_METHODs:
423 EC_GFp_nistp224_method()
424 EC_GFp_nistp256_method()
425 EC_GFp_nistp521_method()
427 EC_GROUP_new_by_curve_name() will automatically use these (while
428 EC_GROUP_new_curve_GFp() currently prefers the more flexible
430 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
432 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
433 all platforms. Move ssize_t definition from e_os.h to the public
434 header file e_os2.h as it now appears in public header file cms.h
437 *) New -sigopt option to the ca, req and x509 utilities. Additional
438 signature parameters can be passed using this option and in
442 *) Add RSA PSS signing function. This will generate and set the
443 appropriate AlgorithmIdentifiers for PSS based on those in the
444 corresponding EVP_MD_CTX structure. No application support yet.
447 *) Support for companion algorithm specific ASN1 signing routines.
448 New function ASN1_item_sign_ctx() signs a pre-initialised
449 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
450 the appropriate parameters.
453 *) Add new algorithm specific ASN1 verification initialisation function
454 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
455 handling will be the same no matter what EVP_PKEY_METHOD is used.
456 Add a PSS handler to support verification of PSS signatures: checked
457 against a number of sample certificates.
460 *) Add signature printing for PSS. Add PSS OIDs.
461 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
463 *) Add algorithm specific signature printing. An individual ASN1 method
464 can now print out signatures instead of the standard hex dump.
466 More complex signatures (e.g. PSS) can print out more meaningful
467 information. Include DSA version that prints out the signature
471 *) Password based recipient info support for CMS library: implementing
475 *) Split password based encryption into PBES2 and PBKDF2 functions. This
476 neatly separates the code into cipher and PBE sections and is required
477 for some algorithms that split PBES2 into separate pieces (such as
481 *) Session-handling fixes:
482 - Fix handling of connections that are resuming with a session ID,
483 but also support Session Tickets.
484 - Fix a bug that suppressed issuing of a new ticket if the client
485 presented a ticket with an expired session.
486 - Try to set the ticket lifetime hint to something reasonable.
487 - Make tickets shorter by excluding irrelevant information.
488 - On the client side, don't ignore renewed tickets.
489 [Adam Langley, Bodo Moeller (Google)]
491 *) Fix PSK session representation.
494 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
496 This work was sponsored by Intel.
499 *) Add GCM support to TLS library. Some custom code is needed to split
500 the IV between the fixed (from PRF) and explicit (from TLS record)
501 portions. This adds all GCM ciphersuites supported by RFC5288 and
502 RFC5289. Generalise some AES* cipherstrings to inlclude GCM and
503 add a special AESGCM string for GCM only.
506 *) Expand range of ctrls for AES GCM. Permit setting invocation
507 field on decrypt and retrieval of invocation field only on encrypt.
510 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
511 As required by RFC5289 these ciphersuites cannot be used if for
512 versions of TLS earlier than 1.2.
515 *) For FIPS capable OpenSSL interpret a NULL default public key method
516 as unset and return the appopriate default but do *not* set the default.
517 This means we can return the appopriate method in applications that
518 swicth between FIPS and non-FIPS modes.
521 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
522 ENGINE is used then we cannot handle that in the FIPS module so we
523 keep original code iff non-FIPS operations are allowed.
526 *) Add -attime option to openssl utilities.
527 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
529 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
532 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
533 FIPS EC methods unconditionally for now.
536 *) New build option no-ec2m to disable characteristic 2 code.
539 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
540 all cases can be covered as some introduce binary incompatibilities.
543 *) Redirect RSA operations to FIPS module including keygen,
544 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
547 *) Add similar low level API blocking to ciphers.
550 *) Low level digest APIs are not approved in FIPS mode: any attempt
551 to use these will cause a fatal error. Applications that *really* want
552 to use them can use the private_* version instead.
555 *) Redirect cipher operations to FIPS module for FIPS builds.
558 *) Redirect digest operations to FIPS module for FIPS builds.
561 *) Update build system to add "fips" flag which will link in fipscanister.o
562 for static and shared library builds embedding a signature if needed.
565 *) Output TLS supported curves in preference order instead of numerical
566 order. This is currently hardcoded for the highest order curves first.
567 This should be configurable so applications can judge speed vs strength.
570 *) Add TLS v1.2 server support for client authentication.
573 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
577 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
578 FIPS modules versions.
581 *) Add TLS v1.2 client side support for client authentication. Keep cache
582 of handshake records longer as we don't know the hash algorithm to use
583 until after the certificate request message is received.
586 *) Initial TLS v1.2 client support. Add a default signature algorithms
587 extension including all the algorithms we support. Parse new signature
588 format in client key exchange. Relax some ECC signing restrictions for
589 TLS v1.2 as indicated in RFC5246.
592 *) Add server support for TLS v1.2 signature algorithms extension. Switch
593 to new signature format when needed using client digest preference.
594 All server ciphersuites should now work correctly in TLS v1.2. No client
595 support yet and no support for client certificates.
598 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
599 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
600 ciphersuites. At present only RSA key exchange ciphersuites work with
601 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
602 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
603 and version checking.
606 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
607 with this defined it will not be affected by any changes to ssl internal
608 structures. Add several utility functions to allow openssl application
609 to work with OPENSSL_NO_SSL_INTERN defined.
613 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
615 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
618 *) Permit abbreviated handshakes when renegotiating using the function
619 SSL_renegotiate_abbreviated().
620 [Robin Seggelmann <seggelmann@fh-muenster.de>]
622 *) Add call to ENGINE_register_all_complete() to
623 ENGINE_load_builtin_engines(), so some implementations get used
624 automatically instead of needing explicit application support.
627 *) Add support for TLS key exporter as described in RFC5705.
628 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
630 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
631 a few changes are required:
633 Add SSL_OP_NO_TLSv1_1 flag.
635 Update version checking logic to handle version 1.1.
636 Add explicit IV handling (ported from DTLS code).
637 Add command line options to s_client/s_server.
640 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
642 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
643 in CMS and PKCS7 code. When RSA decryption fails use a random key for
644 content decryption and always return the same error. Note: this attack
645 needs on average 2^20 messages so it only affects automated senders. The
646 old behaviour can be reenabled in the CMS code by setting the
647 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
648 an MMA defence is not necessary.
649 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
650 this issue. (CVE-2012-0884)
653 *) Fix CVE-2011-4619: make sure we really are receiving a
654 client hello before rejecting multiple SGC restarts. Thanks to
655 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
658 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
660 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
661 Thanks to Antonio Martin, Enterprise Secure Access Research and
662 Development, Cisco Systems, Inc. for discovering this bug and
663 preparing a fix. (CVE-2012-0050)
666 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
668 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
669 of the Vaudenay padding oracle attack on CBC mode encryption
670 which enables an efficient plaintext recovery attack against
671 the OpenSSL implementation of DTLS. Their attack exploits timing
672 differences arising during decryption processing. A research
673 paper describing this attack can be found at:
674 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
675 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
676 Security Group at Royal Holloway, University of London
677 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
678 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
679 for preparing the fix. (CVE-2011-4108)
680 [Robin Seggelmann, Michael Tuexen]
682 *) Clear bytes used for block padding of SSL 3.0 records.
684 [Adam Langley (Google)]
686 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
687 Kadianakis <desnacked@gmail.com> for discovering this issue and
688 Adam Langley for preparing the fix. (CVE-2011-4619)
689 [Adam Langley (Google)]
691 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
692 [Andrey Kulikov <amdeich@gmail.com>]
694 *) Prevent malformed RFC3779 data triggering an assertion failure.
695 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
696 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
697 [Rob Austein <sra@hactrn.net>]
699 *) Improved PRNG seeding for VOS.
700 [Paul Green <Paul.Green@stratus.com>]
702 *) Fix ssl_ciph.c set-up race.
703 [Adam Langley (Google)]
705 *) Fix spurious failures in ecdsatest.c.
706 [Emilia Käsper (Google)]
708 *) Fix the BIO_f_buffer() implementation (which was mixing different
709 interpretations of the '..._len' fields).
710 [Adam Langley (Google)]
712 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
713 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
714 threads won't reuse the same blinding coefficients.
716 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
717 lock to call BN_BLINDING_invert_ex, and avoids one use of
718 BN_BLINDING_update for each BN_BLINDING structure (previously,
719 the last update always remained unused).
720 [Emilia Käsper (Google)]
722 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
723 [Bob Buckholz (Google)]
725 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
727 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
728 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
729 [Kaspar Brand <ossl@velox.ch>]
731 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
732 for multi-threaded use of ECDH. (CVE-2011-3210)
733 [Adam Langley (Google)]
735 *) Fix x509_name_ex_d2i memory leak on bad inputs.
738 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
739 signature public key algorithm by using OID xref utilities instead.
740 Before this you could only use some ECC ciphersuites with SHA1 only.
743 *) Add protection against ECDSA timing attacks as mentioned in the paper
744 by Billy Bob Brumley and Nicola Tuveri, see:
746 http://eprint.iacr.org/2011/232.pdf
748 [Billy Bob Brumley and Nicola Tuveri]
750 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
752 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
753 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
755 *) Fix bug in string printing code: if *any* escaping is enabled we must
756 escape the escape character (backslash) or the resulting string is
760 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
762 *) Disable code workaround for ancient and obsolete Netscape browsers
763 and servers: an attacker can use it in a ciphersuite downgrade attack.
764 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
767 *) Fixed J-PAKE implementation error, originally discovered by
768 Sebastien Martini, further info and confirmation from Stefan
769 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
772 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
774 *) Fix extension code to avoid race conditions which can result in a buffer
775 overrun vulnerability: resumed sessions must not be modified as they can
776 be shared by multiple threads. CVE-2010-3864
779 *) Fix WIN32 build system to correctly link an ENGINE directory into
783 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
785 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
787 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
789 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
791 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
792 context. The operation can be customised via the ctrl mechanism in
793 case ENGINEs want to include additional functionality.
796 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
799 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
800 output hashes compatible with older versions of OpenSSL.
801 [Willy Weisz <weisz@vcpc.univie.ac.at>]
803 *) Fix compression algorithm handling: if resuming a session use the
804 compression algorithm of the resumed session instead of determining
805 it from client hello again. Don't allow server to change algorithm.
808 *) Add load_crls() function to apps tidying load_certs() too. Add option
809 to verify utility to allow additional CRLs to be included.
812 *) Update OCSP request code to permit adding custom headers to the request:
813 some responders need this.
816 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
818 [Julia Lawall <julia@diku.dk>]
820 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
821 needlessly dereferenced structures, used obsolete functions and
822 didn't handle all updated verify codes correctly.
825 *) Disable MD2 in the default configuration.
828 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
829 indicate the initial BIO being pushed or popped. This makes it possible
830 to determine whether the BIO is the one explicitly called or as a result
831 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
832 it handles reference counts correctly and doesn't zero out the I/O bio
833 when it is not being explicitly popped. WARNING: applications which
834 included workarounds for the old buggy behaviour will need to be modified
835 or they could free up already freed BIOs.
838 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
839 renaming to all platforms (within the 0.9.8 branch, this was
840 done conditionally on Netware platforms to avoid a name clash).
841 [Guenter <lists@gknw.net>]
843 *) Add ECDHE and PSK support to DTLS.
844 [Michael Tuexen <tuexen@fh-muenster.de>]
846 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
850 *) Add "missing" function EVP_MD_flags() (without this the only way to
851 retrieve a digest flags is by accessing the structure directly. Update
852 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
853 or cipher is registered as in the "from" argument. Print out all
854 registered digests in the dgst usage message instead of manually
855 attempting to work them out.
858 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
859 this allows the use of compression and extensions. Change default cipher
860 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
861 by default unless an application cipher string requests it.
864 *) Alter match criteria in PKCS12_parse(). It used to try to use local
865 key ids to find matching certificates and keys but some PKCS#12 files
866 don't follow the (somewhat unwritten) rules and this strategy fails.
867 Now just gather all certificates together and the first private key
868 then look for the first certificate that matches the key.
871 *) Support use of registered digest and cipher names for dgst and cipher
872 commands instead of having to add each one as a special case. So now
879 openssl dgst -sha256 foo
881 and this works for ENGINE based algorithms too.
885 *) Update Gost ENGINE to support parameter files.
886 [Victor B. Wagner <vitus@cryptocom.ru>]
888 *) Support GeneralizedTime in ca utility.
889 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
891 *) Enhance the hash format used for certificate directory links. The new
892 form uses the canonical encoding (meaning equivalent names will work
893 even if they aren't identical) and uses SHA1 instead of MD5. This form
894 is incompatible with the older format and as a result c_rehash should
895 be used to rebuild symbolic links.
898 *) Make PKCS#8 the default write format for private keys, replacing the
899 traditional format. This form is standardised, more secure and doesn't
900 include an implicit MD5 dependency.
903 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
904 committed to OpenSSL should pass this lot as a minimum.
907 *) Add session ticket override functionality for use by EAP-FAST.
908 [Jouni Malinen <j@w1.fi>]
910 *) Modify HMAC functions to return a value. Since these can be implemented
911 in an ENGINE errors can occur.
914 *) Type-checked OBJ_bsearch_ex.
917 *) Type-checked OBJ_bsearch. Also some constification necessitated
918 by type-checking. Still to come: TXT_DB, bsearch(?),
919 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
923 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
924 seconds to a tm structure directly, instead of going through OS
925 specific date routines. This avoids any issues with OS routines such
926 as the year 2038 bug. New *_adj() functions for ASN1 time structures
927 and X509_time_adj_ex() to cover the extended range. The existing
928 X509_time_adj() is still usable and will no longer have any date issues.
931 *) Delta CRL support. New use deltas option which will attempt to locate
932 and search any appropriate delta CRLs available.
934 This work was sponsored by Google.
937 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
938 code and add additional score elements. Validate alternate CRL paths
939 as part of the CRL checking and indicate a new error "CRL path validation
940 error" in this case. Applications wanting additional details can use
941 the verify callback and check the new "parent" field. If this is not
942 NULL CRL path validation is taking place. Existing applications wont
943 see this because it requires extended CRL support which is off by
946 This work was sponsored by Google.
949 *) Support for freshest CRL extension.
951 This work was sponsored by Google.
954 *) Initial indirect CRL support. Currently only supported in the CRLs
955 passed directly and not via lookup. Process certificate issuer
956 CRL entry extension and lookup CRL entries by bother issuer name
957 and serial number. Check and process CRL issuer entry in IDP extension.
959 This work was sponsored by Google.
962 *) Add support for distinct certificate and CRL paths. The CRL issuer
963 certificate is validated separately in this case. Only enabled if
964 an extended CRL support flag is set: this flag will enable additional
965 CRL functionality in future.
967 This work was sponsored by Google.
970 *) Add support for policy mappings extension.
972 This work was sponsored by Google.
975 *) Fixes to pathlength constraint, self issued certificate handling,
976 policy processing to align with RFC3280 and PKITS tests.
978 This work was sponsored by Google.
981 *) Support for name constraints certificate extension. DN, email, DNS
982 and URI types are currently supported.
984 This work was sponsored by Google.
987 *) To cater for systems that provide a pointer-based thread ID rather
988 than numeric, deprecate the current numeric thread ID mechanism and
989 replace it with a structure and associated callback type. This
990 mechanism allows a numeric "hash" to be extracted from a thread ID in
991 either case, and on platforms where pointers are larger than 'long',
992 mixing is done to help ensure the numeric 'hash' is usable even if it
993 can't be guaranteed unique. The default mechanism is to use "&errno"
994 as a pointer-based thread ID to distinguish between threads.
996 Applications that want to provide their own thread IDs should now use
997 CRYPTO_THREADID_set_callback() to register a callback that will call
998 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
1000 Note that ERR_remove_state() is now deprecated, because it is tied
1001 to the assumption that thread IDs are numeric. ERR_remove_state(0)
1002 to free the current thread's error state should be replaced by
1003 ERR_remove_thread_state(NULL).
1005 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
1006 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
1007 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
1008 application was previously providing a numeric thread callback that
1009 was inappropriate for distinguishing threads, then uniqueness might
1010 have been obtained with &errno that happened immediately in the
1011 intermediate development versions of OpenSSL; this is no longer the
1012 case, the numeric thread callback will now override the automatic use
1014 [Geoff Thorpe, with help from Bodo Moeller]
1016 *) Initial support for different CRL issuing certificates. This covers a
1017 simple case where the self issued certificates in the chain exist and
1018 the real CRL issuer is higher in the existing chain.
1020 This work was sponsored by Google.
1023 *) Removed effectively defunct crypto/store from the build.
1026 *) Revamp of STACK to provide stronger type-checking. Still to come:
1027 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
1028 ASN1_STRING, CONF_VALUE.
1031 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
1032 RAM on SSL connections. This option can save about 34k per idle SSL.
1035 *) Revamp of LHASH to provide stronger type-checking. Still to come:
1036 STACK, TXT_DB, bsearch, qsort.
1039 *) Initial support for Cryptographic Message Syntax (aka CMS) based
1040 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
1041 support for data, signedData, compressedData, digestedData and
1042 encryptedData, envelopedData types included. Scripts to check against
1043 RFC4134 examples draft and interop and consistency checks of many
1044 content types and variants.
1047 *) Add options to enc utility to support use of zlib compression BIO.
1050 *) Extend mk1mf to support importing of options and assembly language
1051 files from Configure script, currently only included in VC-WIN32.
1052 The assembly language rules can now optionally generate the source
1053 files from the associated perl scripts.
1056 *) Implement remaining functionality needed to support GOST ciphersuites.
1057 Interop testing has been performed using CryptoPro implementations.
1058 [Victor B. Wagner <vitus@cryptocom.ru>]
1060 *) s390x assembler pack.
1063 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
1067 *) Implement Opaque PRF Input TLS extension as specified in
1068 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
1069 official specification yet and no extension type assignment by
1070 IANA exists, this extension (for now) will have to be explicitly
1071 enabled when building OpenSSL by providing the extension number
1072 to use. For example, specify an option
1074 -DTLSEXT_TYPE_opaque_prf_input=0x9527
1076 to the "config" or "Configure" script to enable the extension,
1077 assuming extension number 0x9527 (which is a completely arbitrary
1078 and unofficial assignment based on the MD5 hash of the Internet
1079 Draft). Note that by doing so, you potentially lose
1080 interoperability with other TLS implementations since these might
1081 be using the same extension number for other purposes.
1083 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
1084 opaque PRF input value to use in the handshake. This will create
1085 an interal copy of the length-'len' string at 'src', and will
1086 return non-zero for success.
1088 To get more control and flexibility, provide a callback function
1091 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
1092 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
1096 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
1099 Callback function 'cb' will be called in handshakes, and is
1100 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
1101 Argument 'arg' is for application purposes (the value as given to
1102 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
1103 be provided to the callback function). The callback function
1104 has to return non-zero to report success: usually 1 to use opaque
1105 PRF input just if possible, or 2 to enforce use of the opaque PRF
1106 input. In the latter case, the library will abort the handshake
1107 if opaque PRF input is not successfully negotiated.
1109 Arguments 'peerinput' and 'len' given to the callback function
1110 will always be NULL and 0 in the case of a client. A server will
1111 see the client's opaque PRF input through these variables if
1112 available (NULL and 0 otherwise). Note that if the server
1113 provides an opaque PRF input, the length must be the same as the
1114 length of the client's opaque PRF input.
1116 Note that the callback function will only be called when creating
1117 a new session (session resumption can resume whatever was
1118 previously negotiated), and will not be called in SSL 2.0
1119 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
1120 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
1121 for applications that need to enforce opaque PRF input.
1125 *) Update ssl code to support digests other than SHA1+MD5 for handshake
1128 [Victor B. Wagner <vitus@cryptocom.ru>]
1130 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1131 RFC4507bis. The encrypted ticket format is an encrypted encoded
1132 SSL_SESSION structure, that way new session features are automatically
1135 If a client application caches session in an SSL_SESSION structure
1136 support is transparent because tickets are now stored in the encoded
1139 The SSL_CTX structure automatically generates keys for ticket
1140 protection in servers so again support should be possible
1141 with no application modification.
1143 If a client or server wishes to disable RFC4507 support then the option
1144 SSL_OP_NO_TICKET can be set.
1146 Add a TLS extension debugging callback to allow the contents of any client
1147 or server extensions to be examined.
1149 This work was sponsored by Google.
1152 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
1153 OpenSSL should now compile cleanly on gcc 4.2
1154 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
1156 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
1157 support including streaming MAC support: this is required for GOST
1158 ciphersuite support.
1159 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
1161 *) Add option -stream to use PKCS#7 streaming in smime utility. New
1162 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
1163 to output in BER and PEM format.
1166 *) Experimental support for use of HMAC via EVP_PKEY interface. This
1167 allows HMAC to be handled via the EVP_DigestSign*() interface. The
1168 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
1169 ENGINE support for HMAC keys which are unextractable. New -mac and
1170 -macopt options to dgst utility.
1173 *) New option -sigopt to dgst utility. Update dgst to use
1174 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
1175 alternative signing paramaters such as X9.31 or PSS in the dgst
1179 *) Change ssl_cipher_apply_rule(), the internal function that does
1180 the work each time a ciphersuite string requests enabling
1181 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
1182 removing ("!foo+bar") a class of ciphersuites: Now it maintains
1183 the order of disabled ciphersuites such that those ciphersuites
1184 that most recently went from enabled to disabled not only stay
1185 in order with respect to each other, but also have higher priority
1186 than other disabled ciphersuites the next time ciphersuites are
1189 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
1190 the same ciphersuites as with "HIGH" alone, but in a specific
1191 order where the PSK ciphersuites come first (since they are the
1192 most recently disabled ciphersuites when "HIGH" is parsed).
1194 Also, change ssl_create_cipher_list() (using this new
1195 funcionality) such that between otherwise identical
1196 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
1200 *) Change ssl_create_cipher_list() so that it automatically
1201 arranges the ciphersuites in reasonable order before starting
1202 to process the rule string. Thus, the definition for "DEFAULT"
1203 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
1204 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
1205 This makes it much easier to arrive at a reasonable default order
1206 in applications for which anonymous ciphers are OK (meaning
1207 that you can't actually use DEFAULT).
1208 [Bodo Moeller; suggested by Victor Duchovni]
1210 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
1211 processing) into multiple integers instead of setting
1212 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
1213 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
1214 (These masks as well as the individual bit definitions are hidden
1215 away into the non-exported interface ssl/ssl_locl.h, so this
1216 change to the definition of the SSL_CIPHER structure shouldn't
1217 affect applications.) This give us more bits for each of these
1218 categories, so there is no longer a need to coagulate AES128 and
1219 AES256 into a single algorithm bit, and to coagulate Camellia128
1220 and Camellia256 into a single algorithm bit, which has led to all
1223 Thus, among other things, the kludge introduced in 0.9.7m and
1224 0.9.8e for masking out AES256 independently of AES128 or masking
1225 out Camellia256 independently of AES256 is not needed here in 0.9.9.
1227 With the change, we also introduce new ciphersuite aliases that
1228 so far were missing: "AES128", "AES256", "CAMELLIA128", and
1232 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
1233 Use the leftmost N bytes of the signature input if the input is
1234 larger than the prime q (with N being the size in bytes of q).
1237 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
1238 it yet and it is largely untested.
1241 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
1244 *) Initial incomplete changes to avoid need for function casts in OpenSSL
1245 some compilers (gcc 4.2 and later) reject their use. Safestack is
1246 reimplemented. Update ASN1 to avoid use of legacy functions.
1249 *) Win32/64 targets are linked with Winsock2.
1252 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
1253 to external functions. This can be used to increase CRL handling
1254 efficiency especially when CRLs are very large by (for example) storing
1255 the CRL revoked certificates in a database.
1258 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
1259 new CRLs added to a directory can be used. New command line option
1260 -verify_return_error to s_client and s_server. This causes real errors
1261 to be returned by the verify callback instead of carrying on no matter
1262 what. This reflects the way a "real world" verify callback would behave.
1265 *) GOST engine, supporting several GOST algorithms and public key formats.
1266 Kindly donated by Cryptocom.
1269 *) Partial support for Issuing Distribution Point CRL extension. CRLs
1270 partitioned by DP are handled but no indirect CRL or reason partitioning
1271 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
1272 selected via a scoring technique which handles IDP and AKID in CRLs.
1275 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
1276 will ultimately be used for all verify operations: this will remove the
1277 X509_STORE dependency on certificate verification and allow alternative
1278 lookup methods. X509_STORE based implementations of these two callbacks.
1281 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
1282 Modify get_crl() to find a valid (unexpired) CRL if possible.
1285 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
1286 this would be called X509_CRL_cmp() but that name is already used by
1287 a function that just compares CRL issuer names. Cache several CRL
1288 extensions in X509_CRL structure and cache CRLDP in X509.
1291 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
1292 this maps equivalent X509_NAME structures into a consistent structure.
1293 Name comparison can then be performed rapidly using memcmp().
1296 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
1300 *) Allow digests to supply their own micalg string for S/MIME type using
1301 the ctrl EVP_MD_CTRL_MICALG.
1304 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
1305 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
1306 ctrl. It can then customise the structure before and/or after signing
1310 *) New function OBJ_add_sigid() to allow application defined signature OIDs
1311 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
1312 to free up any added signature OIDs.
1315 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
1316 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
1317 digest and cipher tables. New options added to openssl utility:
1318 list-message-digest-algorithms and list-cipher-algorithms.
1321 *) Change the array representation of binary polynomials: the list
1322 of degrees of non-zero coefficients is now terminated with -1.
1323 Previously it was terminated with 0, which was also part of the
1324 value; thus, the array representation was not applicable to
1325 polynomials where t^0 has coefficient zero. This change makes
1326 the array representation useful in a more general context.
1329 *) Various modifications and fixes to SSL/TLS cipher string
1330 handling. For ECC, the code now distinguishes between fixed ECDH
1331 with RSA certificates on the one hand and with ECDSA certificates
1332 on the other hand, since these are separate ciphersuites. The
1333 unused code for Fortezza ciphersuites has been removed.
1335 For consistency with EDH, ephemeral ECDH is now called "EECDH"
1336 (not "ECDHE"). For consistency with the code for DH
1337 certificates, use of ECDH certificates is now considered ECDH
1338 authentication, not RSA or ECDSA authentication (the latter is
1339 merely the CA's signing algorithm and not actively used in the
1342 The temporary ciphersuite alias "ECCdraft" is no longer
1343 available, and ECC ciphersuites are no longer excluded from "ALL"
1344 and "DEFAULT". The following aliases now exist for RFC 4492
1345 ciphersuites, most of these by analogy with the DH case:
1347 kECDHr - ECDH cert, signed with RSA
1348 kECDHe - ECDH cert, signed with ECDSA
1349 kECDH - ECDH cert (signed with either RSA or ECDSA)
1350 kEECDH - ephemeral ECDH
1351 ECDH - ECDH cert or ephemeral ECDH
1357 AECDH - anonymous ECDH
1358 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
1362 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
1363 Use correct micalg parameters depending on digest(s) in signed message.
1366 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
1367 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
1370 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
1371 an engine to register a method. Add ENGINE lookups for methods and
1372 functional reference processing.
1375 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
1376 EVP_{Sign,Verify}* which allow an application to customise the signature
1380 *) New -resign option to smime utility. This adds one or more signers
1381 to an existing PKCS#7 signedData structure. Also -md option to use an
1382 alternative message digest algorithm for signing.
1385 *) Tidy up PKCS#7 routines and add new functions to make it easier to
1386 create PKCS7 structures containing multiple signers. Update smime
1387 application to support multiple signers.
1390 *) New -macalg option to pkcs12 utility to allow setting of an alternative
1394 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
1395 Reorganize PBE internals to lookup from a static table using NIDs,
1396 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
1397 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
1398 PRF which will be automatically used with PBES2.
1401 *) Replace the algorithm specific calls to generate keys in "req" with the
1405 *) Update PKCS#7 enveloped data routines to use new API. This is now
1406 supported by any public key method supporting the encrypt operation. A
1407 ctrl is added to allow the public key algorithm to examine or modify
1408 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
1412 *) Add a ctrl to asn1 method to allow a public key algorithm to express
1413 a default digest type to use. In most cases this will be SHA1 but some
1414 algorithms (such as GOST) need to specify an alternative digest. The
1415 return value indicates how strong the prefernce is 1 means optional and
1416 2 is mandatory (that is it is the only supported type). Modify
1417 ASN1_item_sign() to accept a NULL digest argument to indicate it should
1418 use the default md. Update openssl utilities to use the default digest
1419 type for signing if it is not explicitly indicated.
1422 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
1423 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
1424 signing method from the key type. This effectively removes the link
1425 between digests and public key types.
1428 *) Add an OID cross reference table and utility functions. Its purpose is to
1429 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
1430 rsaEncryption. This will allow some of the algorithm specific hackery
1431 needed to use the correct OID to be removed.
1434 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
1435 structures for PKCS7_sign(). They are now set up by the relevant public
1439 *) Add provisional EC pkey method with support for ECDSA and ECDH.
1442 *) Add support for key derivation (agreement) in the API, DH method and
1446 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
1447 public and private key formats. As a side effect these add additional
1448 command line functionality not previously available: DSA signatures can be
1449 generated and verified using pkeyutl and DH key support and generation in
1454 [Oliver Tappe <zooey@hirschkaefer.de>]
1456 *) New make target "install_html_docs" installs HTML renditions of the
1458 [Oliver Tappe <zooey@hirschkaefer.de>]
1460 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
1461 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
1462 support key and parameter generation and add initial key generation
1463 functionality for RSA.
1466 *) Add functions for main EVP_PKEY_method operations. The undocumented
1467 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
1468 EVP_PKEY_{encrypt,decrypt}_old.
1471 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
1472 key API, doesn't do much yet.
1475 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
1476 public key algorithms. New option to openssl utility:
1477 "list-public-key-algorithms" to print out info.
1480 *) Implement the Supported Elliptic Curves Extension for
1481 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1484 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
1485 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
1488 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
1489 utilities such as rsa, dsa, dsaparam etc except they process any key
1493 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
1494 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
1495 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
1499 *) Initial support for pluggable public key ASN1.
1500 De-spaghettify the public key ASN1 handling. Move public and private
1501 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
1502 algorithm specific handling to a single module within the relevant
1503 algorithm directory. Add functions to allow (near) opaque processing
1504 of public and private key structures.
1507 *) Implement the Supported Point Formats Extension for
1508 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1511 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
1512 for the psk identity [hint] and the psk callback functions to the
1513 SSL_SESSION, SSL and SSL_CTX structure.
1516 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
1520 SSL_CTX_use_psk_identity_hint
1521 SSL_get_psk_identity_hint
1522 SSL_get_psk_identity
1523 SSL_use_psk_identity_hint
1525 [Mika Kousa and Pasi Eronen of Nokia Corporation]
1527 *) Add RFC 3161 compliant time stamp request creation, response generation
1528 and response verification functionality.
1529 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
1531 *) Add initial support for TLS extensions, specifically for the server_name
1532 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1533 have new members for a host name. The SSL data structure has an
1534 additional member SSL_CTX *initial_ctx so that new sessions can be
1535 stored in that context to allow for session resumption, even after the
1536 SSL has been switched to a new SSL_CTX in reaction to a client's
1537 server_name extension.
1539 New functions (subject to change):
1541 SSL_get_servername()
1542 SSL_get_servername_type()
1545 New CTRL codes and macros (subject to change):
1547 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1548 - SSL_CTX_set_tlsext_servername_callback()
1549 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1550 - SSL_CTX_set_tlsext_servername_arg()
1551 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1553 openssl s_client has a new '-servername ...' option.
1555 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1556 '-key2 ...', '-servername_fatal' (subject to change). This allows
1557 testing the HostName extension for a specific single host name ('-cert'
1558 and '-key' remain fallbacks for handshakes without HostName
1559 negotiation). If the unrecogninzed_name alert has to be sent, this by
1560 default is a warning; it becomes fatal with the '-servername_fatal'
1563 [Peter Sylvester, Remy Allais, Christophe Renou]
1565 *) Whirlpool hash implementation is added.
1568 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
1569 bn(64,32). Because of instruction set limitations it doesn't have
1570 any negative impact on performance. This was done mostly in order
1571 to make it possible to share assembler modules, such as bn_mul_mont
1572 implementations, between 32- and 64-bit builds without hassle.
1575 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
1576 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
1580 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
1581 dedicated Montgomery multiplication procedure, is introduced.
1582 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
1583 "64-bit" performance on certain 32-bit targets.
1586 *) New option SSL_OP_NO_COMP to disable use of compression selectively
1587 in SSL structures. New SSL ctrl to set maximum send fragment size.
1588 Save memory by seeting the I/O buffer sizes dynamically instead of
1589 using the maximum available value.
1592 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
1593 in addition to the text details.
1596 *) Very, very preliminary EXPERIMENTAL support for printing of general
1597 ASN1 structures. This currently produces rather ugly output and doesn't
1598 handle several customised structures at all.
1601 *) Integrated support for PVK file format and some related formats such
1602 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
1603 these in the 'rsa' and 'dsa' utilities.
1606 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
1609 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
1610 place for the (very old) "NETSCAPE" format certificates which are now
1611 handled using new ASN1 code equivalents.
1614 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
1615 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
1616 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
1619 *) Modify CRL distribution points extension code to print out previously
1620 unsupported fields. Enhance extension setting code to allow setting of
1624 *) Add print and set support for Issuing Distribution Point CRL extension.
1627 *) Change 'Configure' script to enable Camellia by default.
1630 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
1632 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1633 Thanks to Antonio Martin, Enterprise Secure Access Research and
1634 Development, Cisco Systems, Inc. for discovering this bug and
1635 preparing a fix. (CVE-2012-0050)
1638 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
1640 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1641 of the Vaudenay padding oracle attack on CBC mode encryption
1642 which enables an efficient plaintext recovery attack against
1643 the OpenSSL implementation of DTLS. Their attack exploits timing
1644 differences arising during decryption processing. A research
1645 paper describing this attack can be found at:
1646 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1647 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1648 Security Group at Royal Holloway, University of London
1649 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1650 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1651 for preparing the fix. (CVE-2011-4108)
1652 [Robin Seggelmann, Michael Tuexen]
1654 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
1655 [Ben Laurie, Kasper <ekasper@google.com>]
1657 *) Clear bytes used for block padding of SSL 3.0 records.
1659 [Adam Langley (Google)]
1661 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1662 Kadianakis <desnacked@gmail.com> for discovering this issue and
1663 Adam Langley for preparing the fix. (CVE-2011-4619)
1664 [Adam Langley (Google)]
1666 *) Prevent malformed RFC3779 data triggering an assertion failure.
1667 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1668 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1669 [Rob Austein <sra@hactrn.net>]
1671 *) Fix ssl_ciph.c set-up race.
1672 [Adam Langley (Google)]
1674 *) Fix spurious failures in ecdsatest.c.
1675 [Emilia Käsper (Google)]
1677 *) Fix the BIO_f_buffer() implementation (which was mixing different
1678 interpretations of the '..._len' fields).
1679 [Adam Langley (Google)]
1681 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1682 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1683 threads won't reuse the same blinding coefficients.
1685 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1686 lock to call BN_BLINDING_invert_ex, and avoids one use of
1687 BN_BLINDING_update for each BN_BLINDING structure (previously,
1688 the last update always remained unused).
1689 [Emilia Käsper (Google)]
1691 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1692 for multi-threaded use of ECDH.
1693 [Adam Langley (Google)]
1695 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1698 *) Add protection against ECDSA timing attacks as mentioned in the paper
1699 by Billy Bob Brumley and Nicola Tuveri, see:
1701 http://eprint.iacr.org/2011/232.pdf
1703 [Billy Bob Brumley and Nicola Tuveri]
1705 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
1707 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1708 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1710 *) Fix bug in string printing code: if *any* escaping is enabled we must
1711 escape the escape character (backslash) or the resulting string is
1715 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
1717 *) Disable code workaround for ancient and obsolete Netscape browsers
1718 and servers: an attacker can use it in a ciphersuite downgrade attack.
1719 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1722 *) Fixed J-PAKE implementation error, originally discovered by
1723 Sebastien Martini, further info and confirmation from Stefan
1724 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1727 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
1729 *) Fix extension code to avoid race conditions which can result in a buffer
1730 overrun vulnerability: resumed sessions must not be modified as they can
1731 be shared by multiple threads. CVE-2010-3864
1734 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
1737 *) Don't reencode certificate when calculating signature: cache and use
1738 the original encoding instead. This makes signature verification of
1739 some broken encodings work correctly.
1742 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
1743 is also one of the inputs.
1744 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
1746 *) Don't repeatedly append PBE algorithms to table if they already exist.
1747 Sort table on each new add. This effectively makes the table read only
1748 after all algorithms are added and subsequent calls to PKCS12_pbe_add
1752 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
1754 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
1757 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
1758 access or freeing data twice (CVE-2010-0742)
1759 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
1761 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
1762 common in certificates and some applications which only call
1763 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
1767 Reduce copying into .apps and .test in makevms.com
1768 Don't try to use blank CA certificate in CA.com
1769 Allow use of C files from original directories in maketests.com
1770 [Steven M. Schweda" <sms@antinode.info>]
1772 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
1774 *) When rejecting SSL/TLS records due to an incorrect version number, never
1775 update s->server with a new major version number. As of
1776 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
1777 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
1778 the previous behavior could result in a read attempt at NULL when
1779 receiving specific incorrect SSL/TLS records once record payload
1780 protection is active. (CVE-2010-0740)
1781 [Bodo Moeller, Adam Langley <agl@chromium.org>]
1783 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
1784 could be crashed if the relevant tables were not present (e.g. chrooted).
1785 [Tomas Hoger <thoger@redhat.com>]
1787 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
1789 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
1790 [Martin Olsson, Neel Mehta]
1792 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
1793 accommodate for stack sorting, always a write lock!).
1796 *) On some versions of WIN32 Heap32Next is very slow. This can cause
1797 excessive delays in the RAND_poll(): over a minute. As a workaround
1798 include a time check in the inner Heap32Next loop too.
1801 *) The code that handled flushing of data in SSL/TLS originally used the
1802 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
1803 the problem outlined in PR#1949. The fix suggested there however can
1804 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
1805 of Apache). So instead simplify the code to flush unconditionally.
1806 This should be fine since flushing with no data to flush is a no op.
1809 *) Handle TLS versions 2.0 and later properly and correctly use the
1810 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
1811 off ancient servers have a habit of sticking around for a while...
1814 *) Modify compression code so it frees up structures without using the
1815 ex_data callbacks. This works around a problem where some applications
1816 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
1817 restarting) then use compression (e.g. SSL with compression) later.
1818 This results in significant per-connection memory leaks and
1819 has caused some security issues including CVE-2008-1678 and
1823 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
1824 change when encrypting or decrypting.
1827 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
1828 connect and renegotiate with servers which do not support RI.
1829 Until RI is more widely deployed this option is enabled by default.
1832 *) Add "missing" ssl ctrls to clear options and mode.
1835 *) If client attempts to renegotiate and doesn't support RI respond with
1836 a no_renegotiation alert as required by RFC5746. Some renegotiating
1837 TLS clients will continue a connection gracefully when they receive
1838 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1839 waiting for a server hello which it will never receive. Now we treat a
1840 received no_renegotiation alert as a fatal error. This is because
1841 applications requesting a renegotiation might well expect it to succeed
1842 and would have no code in place to handle the server denying it so the
1843 only safe thing to do is to terminate the connection.
1846 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1847 peer supports secure renegotiation and 0 otherwise. Print out peer
1848 renegotiation support in s_client/s_server.
1851 *) Replace the highly broken and deprecated SPKAC certification method with
1852 the updated NID creation version. This should correctly handle UTF8.
1855 *) Implement RFC5746. Re-enable renegotiation but require the extension
1856 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1857 turns out to be a bad idea. It has been replaced by
1858 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1859 SSL_CTX_set_options(). This is really not recommended unless you
1860 know what you are doing.
1861 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1863 *) Fixes to stateless session resumption handling. Use initial_ctx when
1864 issuing and attempting to decrypt tickets in case it has changed during
1865 servername handling. Use a non-zero length session ID when attempting
1866 stateless session resumption: this makes it possible to determine if
1867 a resumption has occurred immediately after receiving server hello
1868 (several places in OpenSSL subtly assume this) instead of later in
1872 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1873 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1874 fixes for a few places where the return code is not checked
1876 [Julia Lawall <julia@diku.dk>]
1878 *) Add --strict-warnings option to Configure script to include devteam
1879 warnings in other configurations.
1882 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1883 makes it possible to install openssl libraries in locations which
1884 have names other than "lib", for example "/usr/lib64" which some
1886 [Steve Henson, based on patch from Jeremy Utley]
1888 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1889 X690 8.9.12 and can produce some misleading textual output of OIDs.
1890 [Steve Henson, reported by Dan Kaminsky]
1892 *) Delete MD2 from algorithm tables. This follows the recommendation in
1893 several standards that it is not used in new applications due to
1894 several cryptographic weaknesses. For binary compatibility reasons
1895 the MD2 API is still compiled in by default.
1898 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1902 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1903 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1905 [Guenter <lists@gknw.net>]
1907 *) Fix the server certificate chain building code to use X509_verify_cert(),
1908 it used to have an ad-hoc builder which was unable to cope with anything
1909 other than a simple chain.
1910 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1912 *) Don't check self signed certificate signatures in X509_verify_cert()
1913 by default (a flag can override this): it just wastes time without
1914 adding any security. As a useful side effect self signed root CAs
1915 with non-FIPS digests are now usable in FIPS mode.
1918 *) In dtls1_process_out_of_seq_message() the check if the current message
1919 is already buffered was missing. For every new message was memory
1920 allocated, allowing an attacker to perform an denial of service attack
1921 with sending out of seq handshake messages until there is no memory
1922 left. Additionally every future messege was buffered, even if the
1923 sequence number made no sense and would be part of another handshake.
1924 So only messages with sequence numbers less than 10 in advance will be
1925 buffered. (CVE-2009-1378)
1926 [Robin Seggelmann, discovered by Daniel Mentz]
1928 *) Records are buffered if they arrive with a future epoch to be
1929 processed after finishing the corresponding handshake. There is
1930 currently no limitation to this buffer allowing an attacker to perform
1931 a DOS attack with sending records with future epochs until there is no
1932 memory left. This patch adds the pqueue_size() function to detemine
1933 the size of a buffer and limits the record buffer to 100 entries.
1935 [Robin Seggelmann, discovered by Daniel Mentz]
1937 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
1938 parent structure is freed. (CVE-2009-1379)
1941 *) Handle non-blocking I/O properly in SSL_shutdown() call.
1942 [Darryl Miles <darryl-mailinglists@netbauds.net>]
1945 [Ilya O. <vrghost@gmail.com>]
1947 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
1949 *) Disable renegotiation completely - this fixes a severe security
1950 problem (CVE-2009-3555) at the cost of breaking all
1951 renegotiation. Renegotiation can be re-enabled by setting
1952 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
1953 run-time. This is really not recommended unless you know what
1957 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
1959 *) Don't set val to NULL when freeing up structures, it is freed up by
1960 underlying code. If sizeof(void *) > sizeof(long) this can result in
1961 zeroing past the valid field. (CVE-2009-0789)
1962 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
1964 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
1965 checked correctly. This would allow some invalid signed attributes to
1966 appear to verify correctly. (CVE-2009-0591)
1967 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1969 *) Reject UniversalString and BMPString types with invalid lengths. This
1970 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
1971 a legal length. (CVE-2009-0590)
1974 *) Set S/MIME signing as the default purpose rather than setting it
1975 unconditionally. This allows applications to override it at the store
1979 *) Permit restricted recursion of ASN1 strings. This is needed in practice
1980 to handle some structures.
1983 *) Improve efficiency of mem_gets: don't search whole buffer each time
1985 [Jeremy Shapiro <jnshapir@us.ibm.com>]
1987 *) New -hex option for openssl rand.
1990 *) Print out UTF8String and NumericString when parsing ASN1.
1993 *) Support NumericString type for name components.
1996 *) Allow CC in the environment to override the automatically chosen
1997 compiler. Note that nothing is done to ensure flags work with the
2001 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2003 *) Properly check EVP_VerifyFinal() and similar return values
2005 [Ben Laurie, Bodo Moeller, Google Security Team]
2007 *) Enable TLS extensions by default.
2010 *) Allow the CHIL engine to be loaded, whether the application is
2011 multithreaded or not. (This does not release the developer from the
2012 obligation to set up the dynamic locking callbacks.)
2013 [Sander Temme <sander@temme.net>]
2015 *) Use correct exit code if there is an error in dgst command.
2016 [Steve Henson; problem pointed out by Roland Dirlewanger]
2018 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2019 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2022 *) Add experimental JPAKE support, including demo authentication in
2023 s_client and s_server.
2026 *) Set the comparison function in v3_addr_canonize().
2027 [Rob Austein <sra@hactrn.net>]
2029 *) Add support for XMPP STARTTLS in s_client.
2030 [Philip Paeps <philip@freebsd.org>]
2032 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2033 to ensure that even with this option, only ciphersuites in the
2034 server's preference list will be accepted. (Note that the option
2035 applies only when resuming a session, so the earlier behavior was
2036 just about the algorithm choice for symmetric cryptography.)
2039 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2041 *) Fix NULL pointer dereference if a DTLS server received
2042 ChangeCipherSpec as first record (CVE-2009-1386).
2045 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
2046 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2049 *) The fix in 0.9.8c that supposedly got rid of unsafe
2050 double-checked locking was incomplete for RSA blinding,
2051 addressing just one layer of what turns out to have been
2052 doubly unsafe triple-checked locking.
2054 So now fix this for real by retiring the MONT_HELPER macro
2055 in crypto/rsa/rsa_eay.c.
2057 [Bodo Moeller; problem pointed out by Marius Schilder]
2059 *) Various precautionary measures:
2061 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2063 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2064 (NB: This would require knowledge of the secret session ticket key
2065 to exploit, in which case you'd be SOL either way.)
2067 - Change bn_nist.c so that it will properly handle input BIGNUMs
2068 outside the expected range.
2070 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2073 [Neel Mehta, Bodo Moeller]
2075 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2076 the load fails. Useful for distros.
2077 [Ben Laurie and the FreeBSD team]
2079 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2082 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2085 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2087 This work was sponsored by Logica.
2090 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2091 keystores. Support for SSL/TLS client authentication too.
2092 Not compiled unless enable-capieng specified to Configure.
2094 This work was sponsored by Logica.
2097 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2098 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2099 attribute creation routines such as certifcate requests and PKCS#12
2103 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2105 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2106 handshake which could lead to a cilent crash as found using the
2107 Codenomicon TLS test suite (CVE-2008-1672)
2108 [Steve Henson, Mark Cox]
2110 *) Fix double free in TLS server name extensions which could lead to
2111 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2114 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2116 Clear the error queue to ensure that error entries left from
2117 older function calls do not interfere with the correct operation.
2118 [Lutz Jaenicke, Erik de Castro Lopo]
2120 *) Remove root CA certificates of commercial CAs:
2122 The OpenSSL project does not recommend any specific CA and does not
2123 have any policy with respect to including or excluding any CA.
2124 Therefore it does not make any sense to ship an arbitrary selection
2125 of root CA certificates with the OpenSSL software.
2128 *) RSA OAEP patches to fix two separate invalid memory reads.
2129 The first one involves inputs when 'lzero' is greater than
2130 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
2131 before the beginning of from). The second one involves inputs where
2132 the 'db' section contains nothing but zeroes (there is a one-byte
2133 invalid read after the end of 'db').
2134 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2136 *) Partial backport from 0.9.9-dev:
2138 Introduce bn_mul_mont (dedicated Montgomery multiplication
2139 procedure) as a candidate for BIGNUM assembler implementation.
2140 While 0.9.9-dev uses assembler for various architectures, only
2141 x86_64 is available by default here in the 0.9.8 branch, and
2142 32-bit x86 is available through a compile-time setting.
2144 To try the 32-bit x86 assembler implementation, use Configure
2145 option "enable-montasm" (which exists only for this backport).
2147 As "enable-montasm" for 32-bit x86 disclaims code stability
2148 anyway, in this constellation we activate additional code
2149 backported from 0.9.9-dev for further performance improvements,
2150 namely BN_from_montgomery_word. (To enable this otherwise,
2151 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
2153 [Andy Polyakov (backport partially by Bodo Moeller)]
2155 *) Add TLS session ticket callback. This allows an application to set
2156 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
2157 values. This is useful for key rollover for example where several key
2158 sets may exist with different names.
2161 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
2162 This was broken until now in 0.9.8 releases, such that the only way
2163 a registered ENGINE could be used (assuming it initialises
2164 successfully on the host) was to explicitly set it as the default
2165 for the relevant algorithms. This is in contradiction with 0.9.7
2166 behaviour and the documentation. With this fix, when an ENGINE is
2167 registered into a given algorithm's table of implementations, the
2168 'uptodate' flag is reset so that auto-discovery will be used next
2169 time a new context for that algorithm attempts to select an
2171 [Ian Lister (tweaked by Geoff Thorpe)]
2173 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
2174 implemention in the following ways:
2176 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
2179 Lack of BER streaming support means one pass streaming processing is
2180 only supported if data is detached: setting the streaming flag is
2181 ignored for embedded content.
2183 CMS support is disabled by default and must be explicitly enabled
2184 with the enable-cms configuration option.
2187 *) Update the GMP engine glue to do direct copies between BIGNUM and
2188 mpz_t when openssl and GMP use the same limb size. Otherwise the
2189 existing "conversion via a text string export" trick is still used.
2190 [Paul Sheer <paulsheer@gmail.com>]
2192 *) Zlib compression BIO. This is a filter BIO which compressed and
2193 uncompresses any data passed through it.
2196 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
2197 RFC3394 compatible AES key wrapping.
2200 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
2201 sets string data without copying. X509_ALGOR_set0() and
2202 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
2203 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
2204 from an X509_ATTRIBUTE structure optionally checking it occurs only
2205 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
2209 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
2210 to get the expected BN_FLG_CONSTTIME behavior.
2211 [Bodo Moeller (Google)]
2215 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
2216 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
2217 - added some more tests to do_tests.pl
2218 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
2219 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
2220 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
2221 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
2222 - various changes to netware.pl to enable gcc-cross builds on Win32
2224 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
2225 - various changes to fix missing prototype warnings
2226 - fixed x86nasm.pl to create correct asm files for NASM COFF output
2227 - added AES, WHIRLPOOL and CPUID assembler code to build files
2228 - added missing AES assembler make rules to mk1mf.pl
2229 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
2230 [Guenter Knauf <eflash@gmx.net>]
2232 *) Implement certificate status request TLS extension defined in RFC3546.
2233 A client can set the appropriate parameters and receive the encoded
2234 OCSP response via a callback. A server can query the supplied parameters
2235 and set the encoded OCSP response in the callback. Add simplified examples
2236 to s_client and s_server.
2239 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
2241 *) Fix various bugs:
2242 + Binary incompatibility of ssl_ctx_st structure
2243 + DTLS interoperation with non-compliant servers
2244 + Don't call get_session_cb() without proposed session
2245 + Fix ia64 assembler code
2246 [Andy Polyakov, Steve Henson]
2248 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
2250 *) DTLS Handshake overhaul. There were longstanding issues with
2251 OpenSSL DTLS implementation, which were making it impossible for
2252 RFC 4347 compliant client to communicate with OpenSSL server.
2253 Unfortunately just fixing these incompatibilities would "cut off"
2254 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
2255 server keeps tolerating non RFC compliant syntax. The opposite is
2256 not true, 0.9.8f client can not communicate with earlier server.
2257 This update even addresses CVE-2007-4995.
2260 *) Changes to avoid need for function casts in OpenSSL: some compilers
2261 (gcc 4.2 and later) reject their use.
2262 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
2265 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2266 RFC4507bis. The encrypted ticket format is an encrypted encoded
2267 SSL_SESSION structure, that way new session features are automatically
2270 If a client application caches session in an SSL_SESSION structure
2271 support is transparent because tickets are now stored in the encoded
2274 The SSL_CTX structure automatically generates keys for ticket
2275 protection in servers so again support should be possible
2276 with no application modification.
2278 If a client or server wishes to disable RFC4507 support then the option
2279 SSL_OP_NO_TICKET can be set.
2281 Add a TLS extension debugging callback to allow the contents of any client
2282 or server extensions to be examined.
2284 This work was sponsored by Google.
2287 *) Add initial support for TLS extensions, specifically for the server_name
2288 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2289 have new members for a host name. The SSL data structure has an
2290 additional member SSL_CTX *initial_ctx so that new sessions can be
2291 stored in that context to allow for session resumption, even after the
2292 SSL has been switched to a new SSL_CTX in reaction to a client's
2293 server_name extension.
2295 New functions (subject to change):
2297 SSL_get_servername()
2298 SSL_get_servername_type()
2301 New CTRL codes and macros (subject to change):
2303 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2304 - SSL_CTX_set_tlsext_servername_callback()
2305 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2306 - SSL_CTX_set_tlsext_servername_arg()
2307 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2309 openssl s_client has a new '-servername ...' option.
2311 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2312 '-key2 ...', '-servername_fatal' (subject to change). This allows
2313 testing the HostName extension for a specific single host name ('-cert'
2314 and '-key' remain fallbacks for handshakes without HostName
2315 negotiation). If the unrecogninzed_name alert has to be sent, this by
2316 default is a warning; it becomes fatal with the '-servername_fatal'
2319 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
2321 *) Add AES and SSE2 assembly language support to VC++ build.
2324 *) Mitigate attack on final subtraction in Montgomery reduction.
2327 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
2328 (which previously caused an internal error).
2331 *) Squeeze another 10% out of IGE mode when in != out.
2334 *) AES IGE mode speedup.
2335 [Dean Gaudet (Google)]
2337 *) Add the Korean symmetric 128-bit cipher SEED (see
2338 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
2339 add SEED ciphersuites from RFC 4162:
2341 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
2342 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
2343 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
2344 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
2346 To minimize changes between patchlevels in the OpenSSL 0.9.8
2347 series, SEED remains excluded from compilation unless OpenSSL
2348 is configured with 'enable-seed'.
2349 [KISA, Bodo Moeller]
2351 *) Mitigate branch prediction attacks, which can be practical if a
2352 single processor is shared, allowing a spy process to extract
2353 information. For detailed background information, see
2354 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
2355 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
2356 and Necessary Software Countermeasures"). The core of the change
2357 are new versions BN_div_no_branch() and
2358 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
2359 respectively, which are slower, but avoid the security-relevant
2360 conditional branches. These are automatically called by BN_div()
2361 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
2362 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
2363 remove a conditional branch.
2365 BN_FLG_CONSTTIME is the new name for the previous
2366 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
2367 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
2368 in the exponent causes BN_mod_exp_mont() to use the alternative
2369 implementation in BN_mod_exp_mont_consttime().) The old name
2370 remains as a deprecated alias.
2372 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
2373 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
2374 constant-time implementations for more than just exponentiation.
2375 Here too the old name is kept as a deprecated alias.
2377 BN_BLINDING_new() will now use BN_dup() for the modulus so that
2378 the BN_BLINDING structure gets an independent copy of the
2379 modulus. This means that the previous "BIGNUM *m" argument to
2380 BN_BLINDING_new() and to BN_BLINDING_create_param() now
2381 essentially becomes "const BIGNUM *m", although we can't actually
2382 change this in the header file before 0.9.9. It allows
2383 RSA_setup_blinding() to use BN_with_flags() on the modulus to
2384 enable BN_FLG_CONSTTIME.
2386 [Matthew D Wood (Intel Corp)]
2388 *) In the SSL/TLS server implementation, be strict about session ID
2389 context matching (which matters if an application uses a single
2390 external cache for different purposes). Previously,
2391 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
2392 set. This did ensure strict client verification, but meant that,
2393 with applications using a single external cache for quite
2394 different requirements, clients could circumvent ciphersuite
2395 restrictions for a given session ID context by starting a session
2396 in a different context.
2399 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2400 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2401 authentication-only ciphersuites.
2404 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
2405 not complete and could lead to a possible single byte overflow
2406 (CVE-2007-5135) [Ben Laurie]
2408 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
2410 *) Since AES128 and AES256 (and similarly Camellia128 and
2411 Camellia256) share a single mask bit in the logic of
2412 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2413 kludge to work properly if AES128 is available and AES256 isn't
2414 (or if Camellia128 is available and Camellia256 isn't).
2417 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
2418 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
2419 When a point or a seed is encoded in a BIT STRING, we need to
2420 prevent the removal of trailing zero bits to get the proper DER
2421 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
2422 of a NamedBitList, for which trailing 0 bits need to be removed.)
2425 *) Have SSL/TLS server implementation tolerate "mismatched" record
2426 protocol version while receiving ClientHello even if the
2427 ClientHello is fragmented. (The server can't insist on the
2428 particular protocol version it has chosen before the ServerHello
2429 message has informed the client about his choice.)
2432 *) Add RFC 3779 support.
2433 [Rob Austein for ARIN, Ben Laurie]
2435 *) Load error codes if they are not already present instead of using a
2436 static variable. This allows them to be cleanly unloaded and reloaded.
2437 Improve header file function name parsing.
2440 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
2441 or CAPABILITY handshake as required by RFCs.
2444 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
2446 *) Introduce limits to prevent malicious keys being able to
2447 cause a denial of service. (CVE-2006-2940)
2448 [Steve Henson, Bodo Moeller]
2450 *) Fix ASN.1 parsing of certain invalid structures that can result
2451 in a denial of service. (CVE-2006-2937) [Steve Henson]
2453 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2454 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2456 *) Fix SSL client code which could crash if connecting to a
2457 malicious SSLv2 server. (CVE-2006-4343)
2458 [Tavis Ormandy and Will Drewry, Google Security Team]
2460 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
2461 match only those. Before that, "AES256-SHA" would be interpreted
2462 as a pattern and match "AES128-SHA" too (since AES128-SHA got
2463 the same strength classification in 0.9.7h) as we currently only
2464 have a single AES bit in the ciphersuite description bitmap.
2465 That change, however, also applied to ciphersuite strings such as
2466 "RC4-MD5" that intentionally matched multiple ciphersuites --
2467 namely, SSL 2.0 ciphersuites in addition to the more common ones
2468 from SSL 3.0/TLS 1.0.
2470 So we change the selection algorithm again: Naming an explicit
2471 ciphersuite selects this one ciphersuite, and any other similar
2472 ciphersuite (same bitmap) from *other* protocol versions.
2473 Thus, "RC4-MD5" again will properly select both the SSL 2.0
2474 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
2476 Since SSL 2.0 does not have any ciphersuites for which the
2477 128/256 bit distinction would be relevant, this works for now.
2478 The proper fix will be to use different bits for AES128 and
2479 AES256, which would have avoided the problems from the beginning;
2480 however, bits are scarce, so we can only do this in a new release
2481 (not just a patchlevel) when we can change the SSL_CIPHER
2482 definition to split the single 'unsigned long mask' bitmap into
2483 multiple values to extend the available space.
2487 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
2489 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2490 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2492 *) Add AES IGE and biIGE modes.
2495 *) Change the Unix randomness entropy gathering to use poll() when
2496 possible instead of select(), since the latter has some
2497 undesirable limitations.
2498 [Darryl Miles via Richard Levitte and Bodo Moeller]
2500 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
2501 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
2502 cannot be implicitly activated as part of, e.g., the "AES" alias.
2503 However, please upgrade to OpenSSL 0.9.9[-dev] for
2504 non-experimental use of the ECC ciphersuites to get TLS extension
2505 support, which is required for curve and point format negotiation
2506 to avoid potential handshake problems.
2509 *) Disable rogue ciphersuites:
2511 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
2512 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
2513 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
2515 The latter two were purportedly from
2516 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
2519 Also deactivate the remaining ciphersuites from
2520 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
2521 unofficial, and the ID has long expired.
2524 *) Fix RSA blinding Heisenbug (problems sometimes occured on
2525 dual-core machines) and other potential thread-safety issues.
2528 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
2529 versions), which is now available for royalty-free use
2530 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
2531 Also, add Camellia TLS ciphersuites from RFC 4132.
2533 To minimize changes between patchlevels in the OpenSSL 0.9.8
2534 series, Camellia remains excluded from compilation unless OpenSSL
2535 is configured with 'enable-camellia'.
2538 *) Disable the padding bug check when compression is in use. The padding
2539 bug check assumes the first packet is of even length, this is not
2540 necessarily true if compresssion is enabled and can result in false
2541 positives causing handshake failure. The actual bug test is ancient
2542 code so it is hoped that implementations will either have fixed it by
2543 now or any which still have the bug do not support compression.
2546 Changes between 0.9.8a and 0.9.8b [04 May 2006]
2548 *) When applying a cipher rule check to see if string match is an explicit
2549 cipher suite and only match that one cipher suite if it is.
2552 *) Link in manifests for VC++ if needed.
2553 [Austin Ziegler <halostatue@gmail.com>]
2555 *) Update support for ECC-based TLS ciphersuites according to
2556 draft-ietf-tls-ecc-12.txt with proposed changes (but without
2557 TLS extensions, which are supported starting with the 0.9.9
2558 branch, not in the OpenSSL 0.9.8 branch).
2561 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
2562 opaque EVP_CIPHER_CTX handling.
2565 *) Fixes and enhancements to zlib compression code. We now only use
2566 "zlib1.dll" and use the default __cdecl calling convention on Win32
2567 to conform with the standards mentioned here:
2568 http://www.zlib.net/DLL_FAQ.txt
2569 Static zlib linking now works on Windows and the new --with-zlib-include
2570 --with-zlib-lib options to Configure can be used to supply the location
2571 of the headers and library. Gracefully handle case where zlib library
2575 *) Several fixes and enhancements to the OID generation code. The old code
2576 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
2577 handle numbers larger than ULONG_MAX, truncated printing and had a
2578 non standard OBJ_obj2txt() behaviour.
2581 *) Add support for building of engines under engine/ as shared libraries
2582 under VC++ build system.
2585 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
2586 Hopefully, we will not see any false combination of paths any more.
2589 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
2591 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2592 (part of SSL_OP_ALL). This option used to disable the
2593 countermeasure against man-in-the-middle protocol-version
2594 rollback in the SSL 2.0 server implementation, which is a bad
2595 idea. (CVE-2005-2969)
2597 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2598 for Information Security, National Institute of Advanced Industrial
2599 Science and Technology [AIST], Japan)]
2601 *) Add two function to clear and return the verify parameter flags.
2604 *) Keep cipherlists sorted in the source instead of sorting them at
2605 runtime, thus removing the need for a lock.
2608 *) Avoid some small subgroup attacks in Diffie-Hellman.
2609 [Nick Mathewson and Ben Laurie]
2611 *) Add functions for well-known primes.
2614 *) Extended Windows CE support.
2615 [Satoshi Nakamura and Andy Polyakov]
2617 *) Initialize SSL_METHOD structures at compile time instead of during
2618 runtime, thus removing the need for a lock.
2621 *) Make PKCS7_decrypt() work even if no certificate is supplied by
2622 attempting to decrypt each encrypted key in turn. Add support to
2626 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
2628 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
2631 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
2634 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
2635 key into the same file any more.
2638 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
2641 *) Add -utf8 command line and config file option to 'ca'.
2642 [Stefan <stf@udoma.org]
2644 *) Removed the macro des_crypt(), as it seems to conflict with some
2645 libraries. Use DES_crypt().
2648 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
2649 involves renaming the source and generated shared-libs for
2650 both. The engines will accept the corrected or legacy ids
2651 ('ncipher' and '4758_cca' respectively) when binding. NB,
2652 this only applies when building 'shared'.
2653 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
2655 *) Add attribute functions to EVP_PKEY structure. Modify
2656 PKCS12_create() to recognize a CSP name attribute and
2657 use it. Make -CSP option work again in pkcs12 utility.
2660 *) Add new functionality to the bn blinding code:
2661 - automatic re-creation of the BN_BLINDING parameters after
2662 a fixed number of uses (currently 32)
2663 - add new function for parameter creation
2664 - introduce flags to control the update behaviour of the
2665 BN_BLINDING parameters
2666 - hide BN_BLINDING structure
2667 Add a second BN_BLINDING slot to the RSA structure to improve
2668 performance when a single RSA object is shared among several
2672 *) Add support for DTLS.
2673 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
2675 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
2676 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
2679 *) Remove buggy and incompletet DH cert support from
2680 ssl/ssl_rsa.c and ssl/s3_both.c
2683 *) Use SHA-1 instead of MD5 as the default digest algorithm for
2684 the apps/openssl applications.
2687 *) Compile clean with "-Wall -Wmissing-prototypes
2688 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
2689 DEBUG_SAFESTACK must also be set.
2692 *) Change ./Configure so that certain algorithms can be disabled by default.
2693 The new counterpiece to "no-xxx" is "enable-xxx".
2695 The patented RC5 and MDC2 algorithms will now be disabled unless
2696 "enable-rc5" and "enable-mdc2", respectively, are specified.
2698 (IDEA remains enabled despite being patented. This is because IDEA
2699 is frequently required for interoperability, and there is no license
2700 fee for non-commercial use. As before, "no-idea" can be used to
2701 avoid this algorithm.)
2705 *) Add processing of proxy certificates (see RFC 3820). This work was
2706 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
2707 EGEE (Enabling Grids for E-science in Europe).
2710 *) RC4 performance overhaul on modern architectures/implementations, such
2711 as Intel P4, IA-64 and AMD64.
2714 *) New utility extract-section.pl. This can be used specify an alternative
2715 section number in a pod file instead of having to treat each file as
2716 a separate case in Makefile. This can be done by adding two lines to the
2719 =for comment openssl_section:XXX
2721 The blank line is mandatory.
2725 *) New arguments -certform, -keyform and -pass for s_client and s_server
2726 to allow alternative format key and certificate files and passphrase
2730 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
2731 update associated structures and add various utility functions.
2733 Add new policy related verify parameters, include policy checking in
2734 standard verify code. Enhance 'smime' application with extra parameters
2735 to support policy checking and print out.
2738 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
2739 Nehemiah processors. These extensions support AES encryption in hardware
2740 as well as RNG (though RNG support is currently disabled).
2741 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
2743 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
2746 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
2747 [Andy Polyakov and a number of other people]
2749 *) Improved PowerPC platform support. Most notably BIGNUM assembler
2750 implementation contributed by IBM.
2751 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
2753 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
2754 exponent rather than 'unsigned long'. There is a corresponding change to
2755 the new 'rsa_keygen' element of the RSA_METHOD structure.
2756 [Jelte Jansen, Geoff Thorpe]
2758 *) Functionality for creating the initial serial number file is now
2759 moved from CA.pl to the 'ca' utility with a new option -create_serial.
2761 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
2762 number file to 1, which is bound to cause problems. To avoid
2763 the problems while respecting compatibility between different 0.9.7
2764 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
2765 CA.pl for serial number initialization. With the new release 0.9.8,
2766 we can fix the problem directly in the 'ca' utility.)
2769 *) Reduced header interdepencies by declaring more opaque objects in
2770 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
2771 give fewer recursive includes, which could break lazy source code - so
2772 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
2773 developers should define this symbol when building and using openssl to
2774 ensure they track the recommended behaviour, interfaces, [etc], but
2775 backwards-compatible behaviour prevails when this isn't defined.
2778 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
2781 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
2782 This will generate a random key of the appropriate length based on the
2783 cipher context. The EVP_CIPHER can provide its own random key generation
2784 routine to support keys of a specific form. This is used in the des and
2785 3des routines to generate a key of the correct parity. Update S/MIME
2786 code to use new functions and hence generate correct parity DES keys.
2787 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
2788 valid (weak or incorrect parity).
2791 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
2792 as looking them up. This is useful when the verified structure may contain
2793 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
2794 present unless the new PKCS7_NO_CRL flag is asserted.
2797 *) Extend ASN1 oid configuration module. It now additionally accepts the
2800 shortName = some long name, 1.2.3.4
2803 *) Reimplemented the BN_CTX implementation. There is now no more static
2804 limitation on the number of variables it can handle nor the depth of the
2805 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
2806 information can now expand as required, and rather than having a single
2807 static array of bignums, BN_CTX now uses a linked-list of such arrays
2808 allowing it to expand on demand whilst maintaining the usefulness of
2809 BN_CTX's "bundling".
2812 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
2813 to allow all RSA operations to function using a single BN_CTX.
2816 *) Preliminary support for certificate policy evaluation and checking. This
2817 is initially intended to pass the tests outlined in "Conformance Testing
2818 of Relying Party Client Certificate Path Processing Logic" v1.07.
2821 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
2822 remained unused and not that useful. A variety of other little bignum
2823 tweaks and fixes have also been made continuing on from the audit (see
2827 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
2828 associated ASN1, EVP and SSL functions and old ASN1 macros.
2831 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
2832 and this should never fail. So the return value from the use of
2833 BN_set_word() (which can fail due to needless expansion) is now deprecated;
2834 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
2837 *) BN_CTX_get() should return zero-valued bignums, providing the same
2838 initialised value as BN_new().
2839 [Geoff Thorpe, suggested by Ulf Möller]
2841 *) Support for inhibitAnyPolicy certificate extension.
2844 *) An audit of the BIGNUM code is underway, for which debugging code is
2845 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2846 is considered valid when processing BIGNUMs, and causes execution to
2847 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2848 further steps are taken to deliberately pollute unused data in BIGNUM
2849 structures to try and expose faulty code further on. For now, openssl will
2850 (in its default mode of operation) continue to tolerate the inconsistent
2851 forms that it has tolerated in the past, but authors and packagers should
2852 consider trying openssl and their own applications when compiled with
2853 these debugging symbols defined. It will help highlight potential bugs in
2854 their own code, and will improve the test coverage for OpenSSL itself. At
2855 some point, these tighter rules will become openssl's default to improve
2856 maintainability, though the assert()s and other overheads will remain only
2857 in debugging configurations. See bn.h for more details.
2858 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2860 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2861 that can only be obtained through BN_CTX_new() (which implicitly
2862 initialises it). The presence of this function only made it possible
2863 to overwrite an existing structure (and cause memory leaks).
2866 *) Because of the callback-based approach for implementing LHASH as a
2867 template type, lh_insert() adds opaque objects to hash-tables and
2868 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2869 to clean up those corresponding objects before destroying the hash table
2870 (and losing the object pointers). So some over-zealous constifications in
2871 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2872 objects as "const" and the lh_doall[_arg] callback wrappers are not
2873 prototyped to have "const" restrictions on the object pointers they are
2874 given (and so aren't required to cast them away any more).
2877 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2878 (speed) prefers to use its own implementation. The two implementations
2879 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2880 its object type properly exposed (MS_TM) instead of casting to/from "char
2881 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2882 aren't necessarily the greatest nomenclatures - but this is what was used
2883 internally to the implementation so I've used that for now.
2886 *) Ensure that deprecated functions do not get compiled when
2887 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2888 the self-tests were still using deprecated key-generation functions so
2889 these have been updated also.
2892 *) Reorganise PKCS#7 code to separate the digest location functionality
2893 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2894 New function PKCS7_set_digest() to set the digest type for PKCS#7
2895 digestedData type. Add additional code to correctly generate the
2896 digestedData type and add support for this type in PKCS7 initialization
2900 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2901 structure of type "other".
2904 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2905 sure the loop does correctly stop and breaking ("division by zero")
2906 modulus operations are not performed. The (pre-generated) prime
2907 table crypto/bn/bn_prime.h was already correct, but it could not be
2908 re-generated on some platforms because of the "division by zero"
2909 situation in the script.
2910 [Ralf S. Engelschall]
2912 *) Update support for ECC-based TLS ciphersuites according to
2913 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2914 SHA-1 now is only used for "small" curves (where the
2915 representation of a field element takes up to 24 bytes); for
2916 larger curves, the field element resulting from ECDH is directly
2917 used as premaster secret.
2918 [Douglas Stebila (Sun Microsystems Laboratories)]
2920 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2921 curve secp160r1 to the tests.
2922 [Douglas Stebila (Sun Microsystems Laboratories)]
2924 *) Add the possibility to load symbols globally with DSO.
2925 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
2927 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
2928 control of the error stack.
2931 *) Add support for STORE in ENGINE.
2934 *) Add the STORE type. The intention is to provide a common interface
2935 to certificate and key stores, be they simple file-based stores, or
2936 HSM-type store, or LDAP stores, or...
2937 NOTE: The code is currently UNTESTED and isn't really used anywhere.
2940 *) Add a generic structure called OPENSSL_ITEM. This can be used to
2941 pass a list of arguments to any function as well as provide a way
2942 for a function to pass data back to the caller.
2945 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
2946 works like BUF_strdup() but can be used to duplicate a portion of
2947 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
2951 *) Add the function sk_find_ex() which works like sk_find(), but will
2952 return an index to an element even if an exact match couldn't be
2953 found. The index is guaranteed to point at the element where the
2954 searched-for key would be inserted to preserve sorting order.
2957 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
2958 takes an extra flags argument for optional functionality. Currently,
2959 the following flags are defined:
2961 OBJ_BSEARCH_VALUE_ON_NOMATCH
2962 This one gets OBJ_bsearch_ex() to return a pointer to the first
2963 element where the comparing function returns a negative or zero
2966 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
2967 This one gets OBJ_bsearch_ex() to return a pointer to the first
2968 element where the comparing function returns zero. This is useful
2969 if there are more than one element where the comparing function
2973 *) Make it possible to create self-signed certificates with 'openssl ca'
2974 in such a way that the self-signed certificate becomes part of the
2975 CA database and uses the same mechanisms for serial number generation
2976 as all other certificate signing. The new flag '-selfsign' enables
2977 this functionality. Adapt CA.sh and CA.pl.in.
2980 *) Add functionality to check the public key of a certificate request
2981 against a given private. This is useful to check that a certificate
2982 request can be signed by that key (self-signing).
2985 *) Make it possible to have multiple active certificates with the same
2986 subject in the CA index file. This is done only if the keyword
2987 'unique_subject' is set to 'no' in the main CA section (default
2988 if 'CA_default') of the configuration file. The value is saved
2989 with the database itself in a separate index attribute file,
2990 named like the index file with '.attr' appended to the name.
2993 *) Generate muti valued AVAs using '+' notation in config files for
2997 *) Support for nameConstraints certificate extension.
3000 *) Support for policyConstraints certificate extension.
3003 *) Support for policyMappings certificate extension.
3006 *) Make sure the default DSA_METHOD implementation only uses its
3007 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
3008 and change its own handlers to be NULL so as to remove unnecessary
3009 indirection. This lets alternative implementations fallback to the
3010 default implementation more easily.
3013 *) Support for directoryName in GeneralName related extensions
3017 *) Make it possible to link applications using Makefile.shared.
3018 Make that possible even when linking against static libraries!
3021 *) Support for single pass processing for S/MIME signing. This now
3022 means that S/MIME signing can be done from a pipe, in addition
3023 cleartext signing (multipart/signed type) is effectively streaming
3024 and the signed data does not need to be all held in memory.
3026 This is done with a new flag PKCS7_STREAM. When this flag is set
3027 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
3028 is done after the data is output (and digests calculated) in
3029 SMIME_write_PKCS7().
3032 *) Add full support for -rpath/-R, both in shared libraries and
3033 applications, at least on the platforms where it's known how
3037 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
3038 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
3039 will now compute a table of multiples of the generator that
3040 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
3041 faster (notably in the case of a single point multiplication,
3042 scalar * generator).
3043 [Nils Larsch, Bodo Moeller]
3045 *) IPv6 support for certificate extensions. The various extensions
3046 which use the IP:a.b.c.d can now take IPv6 addresses using the
3047 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
3051 *) Added an ENGINE that implements RSA by performing private key
3052 exponentiations with the GMP library. The conversions to and from
3053 GMP's mpz_t format aren't optimised nor are any montgomery forms
3054 cached, and on x86 it appears OpenSSL's own performance has caught up.
3055 However there are likely to be other architectures where GMP could
3056 provide a boost. This ENGINE is not built in by default, but it can be
3057 specified at Configure time and should be accompanied by the necessary
3058 linker additions, eg;
3059 ./config -DOPENSSL_USE_GMP -lgmp
3062 *) "openssl engine" will not display ENGINE/DSO load failure errors when
3063 testing availability of engines with "-t" - the old behaviour is
3064 produced by increasing the feature's verbosity with "-tt".
3067 *) ECDSA routines: under certain error conditions uninitialized BN objects
3068 could be freed. Solution: make sure initialization is performed early
3069 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
3073 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
3074 and DH_METHOD (eg. by ENGINE implementations) to override the normal
3075 software implementations. For DSA and DH, parameter generation can
3076 also be overriden by providing the appropriate method callbacks.
3079 *) Change the "progress" mechanism used in key-generation and
3080 primality testing to functions that take a new BN_GENCB pointer in
3081 place of callback/argument pairs. The new API functions have "_ex"
3082 postfixes and the older functions are reimplemented as wrappers for
3083 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
3084 declarations of the old functions to help (graceful) attempts to
3085 migrate to the new functions. Also, the new key-generation API
3086 functions operate on a caller-supplied key-structure and return
3087 success/failure rather than returning a key or NULL - this is to
3088 help make "keygen" another member function of RSA_METHOD etc.
3090 Example for using the new callback interface:
3092 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
3096 BN_GENCB_set(&my_cb, my_callback, my_arg);
3098 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
3099 /* For the meaning of a, b in calls to my_callback(), see the
3100 * documentation of the function that calls the callback.
3101 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
3102 * my_callback should return 1 if it wants BN_is_prime_ex()
3103 * to continue, or 0 to stop.
3108 *) Change the ZLIB compression method to be stateful, and make it
3109 available to TLS with the number defined in
3110 draft-ietf-tls-compression-04.txt.
3113 *) Add the ASN.1 structures and functions for CertificatePair, which
3114 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
3116 CertificatePair ::= SEQUENCE {
3117 forward [0] Certificate OPTIONAL,
3118 reverse [1] Certificate OPTIONAL,
3119 -- at least one of the pair shall be present -- }
3121 Also implement the PEM functions to read and write certificate
3122 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
3124 This needed to be defined, mostly for the sake of the LDAP
3125 attribute crossCertificatePair, but may prove useful elsewhere as
3129 *) Make it possible to inhibit symlinking of shared libraries in
3130 Makefile.shared, for Cygwin's sake.
3133 *) Extend the BIGNUM API by creating a function
3134 void BN_set_negative(BIGNUM *a, int neg);
3135 and a macro that behave like
3136 int BN_is_negative(const BIGNUM *a);
3138 to avoid the need to access 'a->neg' directly in applications.
3141 *) Implement fast modular reduction for pseudo-Mersenne primes
3142 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
3143 EC_GROUP_new_curve_GFp() will now automatically use this
3145 [Nils Larsch <nla@trustcenter.de>]
3147 *) Add new lock type (CRYPTO_LOCK_BN).
3150 *) Change the ENGINE framework to automatically load engines
3151 dynamically from specific directories unless they could be
3152 found to already be built in or loaded. Move all the
3153 current engines except for the cryptodev one to a new
3155 The engines in engines/ are built as shared libraries if
3156 the "shared" options was given to ./Configure or ./config.
3157 Otherwise, they are inserted in libcrypto.a.
3158 /usr/local/ssl/engines is the default directory for dynamic
3159 engines, but that can be overriden at configure time through
3160 the usual use of --prefix and/or --openssldir, and at run
3161 time with the environment variable OPENSSL_ENGINES.
3162 [Geoff Thorpe and Richard Levitte]
3164 *) Add Makefile.shared, a helper makefile to build shared
3165 libraries. Addapt Makefile.org.
3168 *) Add version info to Win32 DLLs.
3169 [Peter 'Luna' Runestig" <peter@runestig.com>]
3171 *) Add new 'medium level' PKCS#12 API. Certificates and keys
3172 can be added using this API to created arbitrary PKCS#12
3173 files while avoiding the low level API.
3175 New options to PKCS12_create(), key or cert can be NULL and
3176 will then be omitted from the output file. The encryption
3177 algorithm NIDs can be set to -1 for no encryption, the mac
3178 iteration count can be set to 0 to omit the mac.
3180 Enhance pkcs12 utility by making the -nokeys and -nocerts
3181 options work when creating a PKCS#12 file. New option -nomac
3182 to omit the mac, NONE can be set for an encryption algorithm.
3183 New code is modified to use the enhanced PKCS12_create()
3184 instead of the low level API.
3187 *) Extend ASN1 encoder to support indefinite length constructed
3188 encoding. This can output sequences tags and octet strings in
3189 this form. Modify pk7_asn1.c to support indefinite length
3190 encoding. This is experimental and needs additional code to
3191 be useful, such as an ASN1 bio and some enhanced streaming
3194 Extend template encode functionality so that tagging is passed
3195 down to the template encoder.
3198 *) Let 'openssl req' fail if an argument to '-newkey' is not
3199 recognized instead of using RSA as a default.
3202 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
3203 As these are not official, they are not included in "ALL";
3204 the "ECCdraft" ciphersuite group alias can be used to select them.
3205 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
3207 *) Add ECDH engine support.
3208 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
3210 *) Add ECDH in new directory crypto/ecdh/.
3211 [Douglas Stebila (Sun Microsystems Laboratories)]
3213 *) Let BN_rand_range() abort with an error after 100 iterations
3214 without success (which indicates a broken PRNG).
3217 *) Change BN_mod_sqrt() so that it verifies that the input value
3218 is really the square of the return value. (Previously,
3219 BN_mod_sqrt would show GIGO behaviour.)
3222 *) Add named elliptic curves over binary fields from X9.62, SECG,
3223 and WAP/WTLS; add OIDs that were still missing.
3225 [Sheueling Chang Shantz and Douglas Stebila
3226 (Sun Microsystems Laboratories)]
3228 *) Extend the EC library for elliptic curves over binary fields
3229 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
3232 EC_GF2m_simple_method
3236 EC_GROUP_new_curve_GF2m
3237 EC_GROUP_set_curve_GF2m
3238 EC_GROUP_get_curve_GF2m
3239 EC_POINT_set_affine_coordinates_GF2m
3240 EC_POINT_get_affine_coordinates_GF2m
3241 EC_POINT_set_compressed_coordinates_GF2m
3243 Point compression for binary fields is disabled by default for
3244 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
3247 As binary polynomials are represented as BIGNUMs, various members
3248 of the EC_GROUP and EC_POINT data structures can be shared
3249 between the implementations for prime fields and binary fields;
3250 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
3251 are essentially identical to their ..._GFp counterparts.
3252 (For simplicity, the '..._GFp' prefix has been dropped from
3253 various internal method names.)
3255 An internal 'field_div' method (similar to 'field_mul' and
3256 'field_sqr') has been added; this is used only for binary fields.
3258 [Sheueling Chang Shantz and Douglas Stebila
3259 (Sun Microsystems Laboratories)]
3261 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
3262 through methods ('mul', 'precompute_mult').
3264 The generic implementations (now internally called 'ec_wNAF_mul'
3265 and 'ec_wNAF_precomputed_mult') remain the default if these
3266 methods are undefined.
3268 [Sheueling Chang Shantz and Douglas Stebila
3269 (Sun Microsystems Laboratories)]
3271 *) New function EC_GROUP_get_degree, which is defined through
3272 EC_METHOD. For curves over prime fields, this returns the bit
3273 length of the modulus.
3275 [Sheueling Chang Shantz and Douglas Stebila
3276 (Sun Microsystems Laboratories)]
3278 *) New functions EC_GROUP_dup, EC_POINT_dup.
3279 (These simply call ..._new and ..._copy).
3281 [Sheueling Chang Shantz and Douglas Stebila
3282 (Sun Microsystems Laboratories)]
3284 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
3285 Polynomials are represented as BIGNUMs (where the sign bit is not
3286 used) in the following functions [macros]:
3289 BN_GF2m_sub [= BN_GF2m_add]
3290 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
3291 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
3292 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
3294 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
3295 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
3296 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
3297 BN_GF2m_cmp [= BN_ucmp]
3299 (Note that only the 'mod' functions are actually for fields GF(2^m).
3300 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
3302 For some functions, an the irreducible polynomial defining a
3303 field can be given as an 'unsigned int[]' with strictly
3304 decreasing elements giving the indices of those bits that are set;
3305 i.e., p[] represents the polynomial
3306 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
3308 p[0] > p[1] > ... > p[k] = 0.
3309 This applies to the following functions:
3314 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
3315 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
3317 BN_GF2m_mod_sqrt_arr
3318 BN_GF2m_mod_solve_quad_arr
3322 Conversion can be performed by the following functions:
3327 bntest.c has additional tests for binary polynomial arithmetic.
3329 Two implementations for BN_GF2m_mod_div() are available.
3330 The default algorithm simply uses BN_GF2m_mod_inv() and
3331 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
3332 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
3333 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
3335 [Sheueling Chang Shantz and Douglas Stebila
3336 (Sun Microsystems Laboratories)]
3338 *) Add new error code 'ERR_R_DISABLED' that can be used when some
3339 functionality is disabled at compile-time.
3340 [Douglas Stebila <douglas.stebila@sun.com>]
3342 *) Change default behaviour of 'openssl asn1parse' so that more
3343 information is visible when viewing, e.g., a certificate:
3345 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
3346 mode the content of non-printable OCTET STRINGs is output in a
3347 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
3348 avoid the appearance of a printable string.
3349 [Nils Larsch <nla@trustcenter.de>]
3351 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
3353 EC_GROUP_set_asn1_flag()
3354 EC_GROUP_get_asn1_flag()
3355 EC_GROUP_set_point_conversion_form()
3356 EC_GROUP_get_point_conversion_form()
3357 These control ASN1 encoding details:
3358 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
3359 has been set to OPENSSL_EC_NAMED_CURVE.
3360 - Points are encoded in uncompressed form by default; options for
3361 asn1_for are as for point2oct, namely
3362 POINT_CONVERSION_COMPRESSED
3363 POINT_CONVERSION_UNCOMPRESSED
3364 POINT_CONVERSION_HYBRID
3366 Also add 'seed' and 'seed_len' members to EC_GROUP with access
3369 EC_GROUP_get0_seed()
3370 EC_GROUP_get_seed_len()
3371 This is used only for ASN1 purposes (so far).
3372 [Nils Larsch <nla@trustcenter.de>]
3374 *) Add 'field_type' member to EC_METHOD, which holds the NID
3375 of the appropriate field type OID. The new function
3376 EC_METHOD_get_field_type() returns this value.
3377 [Nils Larsch <nla@trustcenter.de>]
3382 EC_POINT_point2hex()
3383 EC_POINT_hex2point()
3384 providing useful interfaces to EC_POINT_point2oct() and
3385 EC_POINT_oct2point().
3386 [Nils Larsch <nla@trustcenter.de>]
3388 *) Change internals of the EC library so that the functions
3389 EC_GROUP_set_generator()
3390 EC_GROUP_get_generator()
3391 EC_GROUP_get_order()
3392 EC_GROUP_get_cofactor()
3393 are implemented directly in crypto/ec/ec_lib.c and not dispatched
3394 to methods, which would lead to unnecessary code duplication when
3395 adding different types of curves.
3396 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
3398 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
3399 arithmetic, and such that modified wNAFs are generated
3400 (which avoid length expansion in many cases).
3403 *) Add a function EC_GROUP_check_discriminant() (defined via
3404 EC_METHOD) that verifies that the curve discriminant is non-zero.
3406 Add a function EC_GROUP_check() that makes some sanity tests
3407 on a EC_GROUP, its generator and order. This includes
3408 EC_GROUP_check_discriminant().
3409 [Nils Larsch <nla@trustcenter.de>]
3411 *) Add ECDSA in new directory crypto/ecdsa/.
3413 Add applications 'openssl ecparam' and 'openssl ecdsa'
3414 (these are based on 'openssl dsaparam' and 'openssl dsa').
3416 ECDSA support is also included in various other files across the
3417 library. Most notably,
3418 - 'openssl req' now has a '-newkey ecdsa:file' option;
3419 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
3420 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
3421 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
3422 them suitable for ECDSA where domain parameters must be
3423 extracted before the specific public key;
3424 - ECDSA engine support has been added.
3425 [Nils Larsch <nla@trustcenter.de>]
3427 *) Include some named elliptic curves, and add OIDs from X9.62,
3428 SECG, and WAP/WTLS. Each curve can be obtained from the new
3430 EC_GROUP_new_by_curve_name(),
3431 and the list of available named curves can be obtained with
3432 EC_get_builtin_curves().
3433 Also add a 'curve_name' member to EC_GROUP objects, which can be
3435 EC_GROUP_set_curve_name()
3436 EC_GROUP_get_curve_name()
3437 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
3439 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
3440 was actually never needed) and in BN_mul(). The removal in BN_mul()
3441 required a small change in bn_mul_part_recursive() and the addition
3442 of the functions bn_cmp_part_words(), bn_sub_part_words() and
3443 bn_add_part_words(), which do the same thing as bn_cmp_words(),
3444 bn_sub_words() and bn_add_words() except they take arrays with
3448 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
3450 *) Cleanse PEM buffers before freeing them since they may contain
3452 [Benjamin Bennett <ben@psc.edu>]
3454 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3455 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3456 authentication-only ciphersuites.
3459 *) Since AES128 and AES256 share a single mask bit in the logic of
3460 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3461 kludge to work properly if AES128 is available and AES256 isn't.
3464 *) Expand security boundary to match 1.1.1 module.
3467 *) Remove redundant features: hash file source, editing of test vectors
3468 modify fipsld to use external fips_premain.c signature.
3471 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
3472 run algorithm test programs.
3475 *) Make algorithm test programs more tolerant of whitespace.
3478 *) Have SSL/TLS server implementation tolerate "mismatched" record
3479 protocol version while receiving ClientHello even if the
3480 ClientHello is fragmented. (The server can't insist on the
3481 particular protocol version it has chosen before the ServerHello
3482 message has informed the client about his choice.)
3485 *) Load error codes if they are not already present instead of using a
3486 static variable. This allows them to be cleanly unloaded and reloaded.
3489 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
3491 *) Introduce limits to prevent malicious keys being able to
3492 cause a denial of service. (CVE-2006-2940)
3493 [Steve Henson, Bodo Moeller]
3495 *) Fix ASN.1 parsing of certain invalid structures that can result
3496 in a denial of service. (CVE-2006-2937) [Steve Henson]
3498 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3499 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3501 *) Fix SSL client code which could crash if connecting to a
3502 malicious SSLv2 server. (CVE-2006-4343)
3503 [Tavis Ormandy and Will Drewry, Google Security Team]
3505 *) Change ciphersuite string processing so that an explicit
3506 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
3507 will no longer include "AES128-SHA"), and any other similar
3508 ciphersuite (same bitmap) from *other* protocol versions (so that
3509 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
3510 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
3511 changes from 0.9.8b and 0.9.8d.
3514 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
3516 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3517 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3519 *) Change the Unix randomness entropy gathering to use poll() when
3520 possible instead of select(), since the latter has some
3521 undesirable limitations.
3522 [Darryl Miles via Richard Levitte and Bodo Moeller]
3524 *) Disable rogue ciphersuites:
3526 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3527 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3528 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3530 The latter two were purportedly from
3531 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3534 Also deactive the remaining ciphersuites from
3535 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3536 unofficial, and the ID has long expired.
3539 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3540 dual-core machines) and other potential thread-safety issues.
3543 Changes between 0.9.7i and 0.9.7j [04 May 2006]
3545 *) Adapt fipsld and the build system to link against the validated FIPS
3546 module in FIPS mode.
3549 *) Fixes for VC++ 2005 build under Windows.
3552 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
3553 from a Windows bash shell such as MSYS. It is autodetected from the
3554 "config" script when run from a VC++ environment. Modify standard VC++
3555 build to use fipscanister.o from the GNU make build.
3558 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
3560 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
3561 The value now differs depending on if you build for FIPS or not.
3562 BEWARE! A program linked with a shared FIPSed libcrypto can't be
3563 safely run with a non-FIPSed libcrypto, as it may crash because of
3564 the difference induced by this change.
3567 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
3569 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3570 (part of SSL_OP_ALL). This option used to disable the
3571 countermeasure against man-in-the-middle protocol-version
3572 rollback in the SSL 2.0 server implementation, which is a bad
3573 idea. (CVE-2005-2969)
3575 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3576 for Information Security, National Institute of Advanced Industrial
3577 Science and Technology [AIST], Japan)]
3579 *) Minimal support for X9.31 signatures and PSS padding modes. This is
3580 mainly for FIPS compliance and not fully integrated at this stage.
3583 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
3584 the exponentiation using a fixed-length exponent. (Otherwise,
3585 the information leaked through timing could expose the secret key
3586 after many signatures; cf. Bleichenbacher's attack on DSA with
3590 *) Make a new fixed-window mod_exp implementation the default for
3591 RSA, DSA, and DH private-key operations so that the sequence of
3592 squares and multiplies and the memory access pattern are
3593 independent of the particular secret key. This will mitigate
3594 cache-timing and potential related attacks.
3596 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
3597 and this is automatically used by BN_mod_exp_mont() if the new flag
3598 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
3599 will use this BN flag for private exponents unless the flag
3600 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
3601 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
3603 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
3605 *) Change the client implementation for SSLv23_method() and
3606 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
3607 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
3608 (Previously, the SSL 2.0 backwards compatible Client Hello
3609 message format would be used even with SSL_OP_NO_SSLv2.)
3612 *) Add support for smime-type MIME parameter in S/MIME messages which some
3616 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
3617 a threadsafe manner. Modify rsa code to use new function and add calls
3618 to dsa and dh code (which had race conditions before).
3621 *) Include the fixed error library code in the C error file definitions
3622 instead of fixing them up at runtime. This keeps the error code
3623 structures constant.
3626 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
3628 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
3631 *) Fixes for newer kerberos headers. NB: the casts are needed because
3632 the 'length' field is signed on one version and unsigned on another
3633 with no (?) obvious way to tell the difference, without thes
projects / openssl.git / blob