5 Changes between 1.0.1 and 1.1.0 [xx XXX xxxx]
8 [Emilia Kasper, Adam Langley, Ben Laurie (Google)]
10 *) Support for automatic EC temporary key parameter selection. If enabled
11 the most preferred EC parameters are automatically used instead of
12 hardcoded fixed parameters. Now a server just has to call:
13 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
14 support ECDH and use the most appropriate parameters.
17 *) Enhance and tidy EC curve and point format TLS extension code. Use
18 static structures instead of allocation if default values are used.
19 New ctrls to set curves we wish to support and to retrieve shared curves.
20 Print out shared curves in s_server. New options to s_server and s_client
21 to set list of supported curves.
24 *) New ctrls to retrieve supported signature algorithms and
25 supported curve values as an array of NIDs. Extend openssl utility
26 to print out received values.
29 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
30 between NIDs and the more common NIST names such as "P-256". Enhance
31 ecparam utility and ECC method to recognise the NIST names for curves.
34 *) Enhance SSL/TLS certificate chain handling to support different
35 chains for each certificate instead of one chain in the parent SSL_CTX.
38 *) Support for fixed DH ciphersuite client authentication: where both
39 server and client use DH certificates with common parameters.
42 *) Support for fixed DH ciphersuites: those requiring DH server
46 *) Transparently support X9.42 DH parameters when calling
47 PEM_read_bio_DHparameters. This means existing applications can handle
48 the new parameter format automatically.
51 *) Initial experimental support for X9.42 DH parameter format: mainly
52 to support use of 'q' parameter for RFC5114 parameters.
55 *) Add DH parameters from RFC5114 including test data to dhtest.
58 *) Update fips_test_suite to support multiple command line options. New
59 test to induce all self test errors in sequence and check expected
63 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
64 sign or verify all in one operation.
67 *) Add fips_algvs: a multicall fips utility incorporaing all the algorithm
68 test programs and fips_test_suite. Includes functionality to parse
69 the minimal script output of fipsalgest.pl directly.
72 *) Add authorisation parameter to FIPS_module_mode_set().
75 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
78 *) Use separate DRBG fields for internal and external flags. New function
79 FIPS_drbg_health_check() to perform on demand health checking. Add
80 generation tests to fips_test_suite with reduced health check interval to
81 demonstrate periodic health checking. Add "nodh" option to
82 fips_test_suite to skip very slow DH test.
85 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
89 *) More extensive health check for DRBG checking many more failure modes.
90 New function FIPS_selftest_drbg_all() to handle every possible DRBG
91 combination: call this in fips_test_suite.
94 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
95 and POST to handle Dual EC cases.
98 *) Add support for canonical generation of DSA parameter 'g'. See
101 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
102 POST to handle HMAC cases.
105 *) Add functions FIPS_module_version() and FIPS_module_version_text()
106 to return numberical and string versions of the FIPS module number.
109 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
110 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implmeneted
111 outside the validated module in the FIPS capable OpenSSL.
114 *) Minor change to DRBG entropy callback semantics. In some cases
115 there is no mutiple of the block length between min_len and
116 max_len. Allow the callback to return more than max_len bytes
117 of entropy but discard any extra: it is the callback's responsibility
118 to ensure that the extra data discarded does not impact the
119 requested amount of entropy.
122 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
123 information in FIPS186-3, SP800-57 and SP800-131A.
126 *) CCM support via EVP. Interface is very similar to GCM case except we
127 must supply all data in one chunk (i.e. no update, final) and the
128 message length must be supplied if AAD is used. Add algorithm test
132 *) Initial version of POST overhaul. Add POST callback to allow the status
133 of POST to be monitored and/or failures induced. Modify fips_test_suite
134 to use callback. Always run all selftests even if one fails.
137 *) XTS support including algorithm test driver in the fips_gcmtest program.
138 Note: this does increase the maximum key length from 32 to 64 bytes but
139 there should be no binary compatibility issues as existing applications
140 will never use XTS mode.
143 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
144 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
145 performs algorithm blocking for unapproved PRNG types. Also do not
146 set PRNG type in FIPS_mode_set(): leave this to the application.
147 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
148 the standard OpenSSL PRNG: set additional data to a date time vector.
151 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
152 This shouldn't present any incompatibility problems because applications
153 shouldn't be using these directly and any that are will need to rethink
154 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
157 *) Extensive self tests and health checking required by SP800-90 DRBG.
158 Remove strength parameter from FIPS_drbg_instantiate and always
159 instantiate at maximum supported strength.
162 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
165 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
168 *) New function DH_compute_key_padded() to compute a DH key and pad with
169 leading zeroes if needed: this complies with SP800-56A et al.
172 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
173 anything, incomplete, subject to change and largely untested at present.
176 *) Modify fipscanisteronly build option to only build the necessary object
177 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
180 *) Add experimental option FIPSSYMS to give all symbols in
181 fipscanister.o and FIPS or fips prefix. This will avoid
182 conflicts with future versions of OpenSSL. Add perl script
183 util/fipsas.pl to preprocess assembly language source files
184 and rename any affected symbols.
187 *) Add selftest checks and algorithm block of non-fips algorithms in
188 FIPS mode. Remove DES2 from selftests.
191 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
192 return internal method without any ENGINE dependencies. Add new
193 tiny fips sign and verify functions.
196 *) New build option no-ec2m to disable characteristic 2 code.
199 *) New build option "fipscanisteronly". This only builds fipscanister.o
200 and (currently) associated fips utilities. Uses the file Makefile.fips
201 instead of Makefile.org as the prototype.
204 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
205 Update fips_gcmtest to use IV generator.
208 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
209 setting output buffer to NULL. The *Final function must be
210 called although it will not retrieve any additional data. The tag
211 can be set or retrieved with a ctrl. The IV length is by default 12
212 bytes (96 bits) but can be set to an alternative value. If the IV
213 length exceeds the maximum IV length (currently 16 bytes) it cannot be
217 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
218 underlying do_cipher function handles all cipher semantics itself
219 including padding and finalisation. This is useful if (for example)
220 an ENGINE cipher handles block padding itself. The behaviour of
221 do_cipher is subtly changed if this flag is set: the return value
222 is the number of characters written to the output buffer (zero is
223 no longer an error code) or a negative error code. Also if the
224 input buffer is NULL and length 0 finalisation should be performed.
227 *) If a candidate issuer certificate is already part of the constructed
228 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
231 *) Improve forward-security support: add functions
233 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
234 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
236 for use by SSL/TLS servers; the callback function will be called whenever a
237 new session is created, and gets to decide whether the session may be
238 cached to make it resumable (return 0) or not (return 1). (As by the
239 SSL/TLS protocol specifications, the session_id sent by the server will be
240 empty to indicate that the session is not resumable; also, the server will
241 not generate RFC 4507 (RFC 5077) session tickets.)
243 A simple reasonable callback implementation is to return is_forward_secure.
244 This parameter will be set to 1 or 0 depending on the ciphersuite selected
245 by the SSL/TLS server library, indicating whether it can provide forward
247 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
249 *) New function OPENSSL_gmtime_diff to find the difference in days
250 and seconds between two tm structures. This will be used to provide
251 additional functionality for ASN1_TIME.
254 *) Add -trusted_first option which attempts to find certificates in the
255 trusted store even if an untrusted chain is also supplied.
258 *) Initial experimental support for explicitly trusted non-root CAs.
259 OpenSSL still tries to build a complete chain to a root but if an
260 intermediate CA has a trust setting included that is used. The first
261 setting is used: whether to trust or reject.
264 *) New -verify_name option in command line utilities to set verification
268 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
269 Add CMAC pkey methods.
272 *) Experimental regnegotiation in s_server -www mode. If the client
273 browses /reneg connection is renegotiated. If /renegcert it is
274 renegotiated requesting a certificate.
277 *) Add an "external" session cache for debugging purposes to s_server. This
278 should help trace issues which normally are only apparent in deployed
279 multi-process servers.
282 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
283 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
284 BIO_set_cipher() and some obscure PEM functions were changed so they
285 can now return an error. The RAND changes required a change to the
286 RAND_METHOD structure.
289 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
290 a gcc attribute to warn if the result of a function is ignored. This
291 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
292 whose return value is often ignored.
295 Changes between 1.0.1c and 1.0.1d [xx XXX xxxx]
297 *) Fix possible deadlock when decoding public keys.
300 *) Don't use TLS 1.0 record version number in initial client hello
304 Changes between 1.0.1b and 1.0.1c [10 May 2012]
306 *) Sanity check record length before skipping explicit IV in TLS
307 1.2, 1.1 and DTLS to avoid DoS attack.
309 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
310 fuzzing as a service testing platform.
314 *) Initialise tkeylen properly when encrypting CMS messages.
315 Thanks to Solar Designer of Openwall for reporting this issue.
318 *) In FIPS mode don't try to use composite ciphers as they are not
322 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
324 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
325 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
326 mean any application compiled against OpenSSL 1.0.0 headers setting
327 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
328 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
329 0x10000000L Any application which was previously compiled against
330 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
331 will need to be recompiled as a result. Letting be results in
332 inability to disable specifically TLS 1.1 and in client context,
333 in unlike event, limit maximum offered version to TLS 1.0 [see below].
336 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
337 disable just protocol X, but all protocols above X *if* there are
338 protocols *below* X still enabled. In more practical terms it means
339 that if application wants to disable TLS1.0 in favor of TLS1.1 and
340 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
341 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
345 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
347 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
348 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
349 in CRYPTO_realloc_clean.
351 Thanks to Tavis Ormandy, Google Security Team, for discovering this
352 issue and to Adam Langley <agl@chromium.org> for fixing it.
354 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
356 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
359 *) Workarounds for some broken servers that "hang" if a client hello
360 record length exceeds 255 bytes:
362 1. Do not use record version number > TLS 1.0 in initial client
363 hello: some (but not all) hanging servers will now work.
364 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
365 the number of ciphers sent in the client hello. This should be
366 set to an even number, such as 50, for example by passing:
367 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
368 Most broken servers should now work.
369 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
370 TLS 1.2 client support entirely.
373 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
376 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
378 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
379 STRING form instead of a DigestInfo.
382 *) The format used for MDC2 RSA signatures is inconsistent between EVP
383 and the RSA_sign/RSA_verify functions. This was made more apparent when
384 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
385 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
386 the correct format in RSA_verify so both forms transparently work.
389 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
390 STRING form instead of a DigestInfo.
393 *) Some servers which support TLS 1.0 can choke if we initially indicate
394 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
395 encrypted premaster secret. As a workaround use the maximum pemitted
396 client version in client hello, this should keep such servers happy
397 and still work with previous versions of OpenSSL.
400 *) Add support for TLS/DTLS heartbeats.
401 [Robin Seggelmann <seggelmann@fh-muenster.de>]
403 *) Add support for SCTP.
404 [Robin Seggelmann <seggelmann@fh-muenster.de>]
406 *) Improved PRNG seeding for VOS.
407 [Paul Green <Paul.Green@stratus.com>]
409 *) Extensive assembler packs updates, most notably:
411 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
412 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
413 - x86_64: bit-sliced AES implementation;
414 - ARM: NEON support, contemporary platforms optimizations;
415 - s390x: z196 support;
416 - *: GHASH and GF(2^m) multiplication implementations;
420 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
421 (removal of unnecessary code)
422 [Peter Sylvester <peter.sylvester@edelweb.fr>]
424 *) Add TLS key material exporter from RFC 5705.
427 *) Add DTLS-SRTP negotiation from RFC 5764.
430 *) Add Next Protocol Negotiation,
431 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
432 disabled with a no-npn flag to config or Configure. Code donated
434 [Adam Langley <agl@google.com> and Ben Laurie]
436 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
437 NIST-P256, NIST-P521, with constant-time single point multiplication on
438 typical inputs. Compiler support for the nonstandard type __uint128_t is
439 required to use this (present in gcc 4.4 and later, for 64-bit builds).
440 Code made available under Apache License version 2.0.
442 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
443 line to include this in your build of OpenSSL, and run "make depend" (or
444 "make update"). This enables the following EC_METHODs:
446 EC_GFp_nistp224_method()
447 EC_GFp_nistp256_method()
448 EC_GFp_nistp521_method()
450 EC_GROUP_new_by_curve_name() will automatically use these (while
451 EC_GROUP_new_curve_GFp() currently prefers the more flexible
453 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
455 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
456 all platforms. Move ssize_t definition from e_os.h to the public
457 header file e_os2.h as it now appears in public header file cms.h
460 *) New -sigopt option to the ca, req and x509 utilities. Additional
461 signature parameters can be passed using this option and in
465 *) Add RSA PSS signing function. This will generate and set the
466 appropriate AlgorithmIdentifiers for PSS based on those in the
467 corresponding EVP_MD_CTX structure. No application support yet.
470 *) Support for companion algorithm specific ASN1 signing routines.
471 New function ASN1_item_sign_ctx() signs a pre-initialised
472 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
473 the appropriate parameters.
476 *) Add new algorithm specific ASN1 verification initialisation function
477 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
478 handling will be the same no matter what EVP_PKEY_METHOD is used.
479 Add a PSS handler to support verification of PSS signatures: checked
480 against a number of sample certificates.
483 *) Add signature printing for PSS. Add PSS OIDs.
484 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
486 *) Add algorithm specific signature printing. An individual ASN1 method
487 can now print out signatures instead of the standard hex dump.
489 More complex signatures (e.g. PSS) can print out more meaningful
490 information. Include DSA version that prints out the signature
494 *) Password based recipient info support for CMS library: implementing
498 *) Split password based encryption into PBES2 and PBKDF2 functions. This
499 neatly separates the code into cipher and PBE sections and is required
500 for some algorithms that split PBES2 into separate pieces (such as
504 *) Session-handling fixes:
505 - Fix handling of connections that are resuming with a session ID,
506 but also support Session Tickets.
507 - Fix a bug that suppressed issuing of a new ticket if the client
508 presented a ticket with an expired session.
509 - Try to set the ticket lifetime hint to something reasonable.
510 - Make tickets shorter by excluding irrelevant information.
511 - On the client side, don't ignore renewed tickets.
512 [Adam Langley, Bodo Moeller (Google)]
514 *) Fix PSK session representation.
517 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
519 This work was sponsored by Intel.
522 *) Add GCM support to TLS library. Some custom code is needed to split
523 the IV between the fixed (from PRF) and explicit (from TLS record)
524 portions. This adds all GCM ciphersuites supported by RFC5288 and
525 RFC5289. Generalise some AES* cipherstrings to inlclude GCM and
526 add a special AESGCM string for GCM only.
529 *) Expand range of ctrls for AES GCM. Permit setting invocation
530 field on decrypt and retrieval of invocation field only on encrypt.
533 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
534 As required by RFC5289 these ciphersuites cannot be used if for
535 versions of TLS earlier than 1.2.
538 *) For FIPS capable OpenSSL interpret a NULL default public key method
539 as unset and return the appopriate default but do *not* set the default.
540 This means we can return the appopriate method in applications that
541 swicth between FIPS and non-FIPS modes.
544 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
545 ENGINE is used then we cannot handle that in the FIPS module so we
546 keep original code iff non-FIPS operations are allowed.
549 *) Add -attime option to openssl utilities.
550 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
552 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
555 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
556 FIPS EC methods unconditionally for now.
559 *) New build option no-ec2m to disable characteristic 2 code.
562 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
563 all cases can be covered as some introduce binary incompatibilities.
566 *) Redirect RSA operations to FIPS module including keygen,
567 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
570 *) Add similar low level API blocking to ciphers.
573 *) Low level digest APIs are not approved in FIPS mode: any attempt
574 to use these will cause a fatal error. Applications that *really* want
575 to use them can use the private_* version instead.
578 *) Redirect cipher operations to FIPS module for FIPS builds.
581 *) Redirect digest operations to FIPS module for FIPS builds.
584 *) Update build system to add "fips" flag which will link in fipscanister.o
585 for static and shared library builds embedding a signature if needed.
588 *) Output TLS supported curves in preference order instead of numerical
589 order. This is currently hardcoded for the highest order curves first.
590 This should be configurable so applications can judge speed vs strength.
593 *) Add TLS v1.2 server support for client authentication.
596 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
600 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
601 FIPS modules versions.
604 *) Add TLS v1.2 client side support for client authentication. Keep cache
605 of handshake records longer as we don't know the hash algorithm to use
606 until after the certificate request message is received.
609 *) Initial TLS v1.2 client support. Add a default signature algorithms
610 extension including all the algorithms we support. Parse new signature
611 format in client key exchange. Relax some ECC signing restrictions for
612 TLS v1.2 as indicated in RFC5246.
615 *) Add server support for TLS v1.2 signature algorithms extension. Switch
616 to new signature format when needed using client digest preference.
617 All server ciphersuites should now work correctly in TLS v1.2. No client
618 support yet and no support for client certificates.
621 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
622 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
623 ciphersuites. At present only RSA key exchange ciphersuites work with
624 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
625 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
626 and version checking.
629 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
630 with this defined it will not be affected by any changes to ssl internal
631 structures. Add several utility functions to allow openssl application
632 to work with OPENSSL_NO_SSL_INTERN defined.
636 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
638 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
641 *) Permit abbreviated handshakes when renegotiating using the function
642 SSL_renegotiate_abbreviated().
643 [Robin Seggelmann <seggelmann@fh-muenster.de>]
645 *) Add call to ENGINE_register_all_complete() to
646 ENGINE_load_builtin_engines(), so some implementations get used
647 automatically instead of needing explicit application support.
650 *) Add support for TLS key exporter as described in RFC5705.
651 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
653 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
654 a few changes are required:
656 Add SSL_OP_NO_TLSv1_1 flag.
658 Update version checking logic to handle version 1.1.
659 Add explicit IV handling (ported from DTLS code).
660 Add command line options to s_client/s_server.
663 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
665 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
666 in CMS and PKCS7 code. When RSA decryption fails use a random key for
667 content decryption and always return the same error. Note: this attack
668 needs on average 2^20 messages so it only affects automated senders. The
669 old behaviour can be reenabled in the CMS code by setting the
670 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
671 an MMA defence is not necessary.
672 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
673 this issue. (CVE-2012-0884)
676 *) Fix CVE-2011-4619: make sure we really are receiving a
677 client hello before rejecting multiple SGC restarts. Thanks to
678 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
681 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
683 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
684 Thanks to Antonio Martin, Enterprise Secure Access Research and
685 Development, Cisco Systems, Inc. for discovering this bug and
686 preparing a fix. (CVE-2012-0050)
689 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
691 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
692 of the Vaudenay padding oracle attack on CBC mode encryption
693 which enables an efficient plaintext recovery attack against
694 the OpenSSL implementation of DTLS. Their attack exploits timing
695 differences arising during decryption processing. A research
696 paper describing this attack can be found at:
697 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
698 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
699 Security Group at Royal Holloway, University of London
700 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
701 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
702 for preparing the fix. (CVE-2011-4108)
703 [Robin Seggelmann, Michael Tuexen]
705 *) Clear bytes used for block padding of SSL 3.0 records.
707 [Adam Langley (Google)]
709 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
710 Kadianakis <desnacked@gmail.com> for discovering this issue and
711 Adam Langley for preparing the fix. (CVE-2011-4619)
712 [Adam Langley (Google)]
714 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
715 [Andrey Kulikov <amdeich@gmail.com>]
717 *) Prevent malformed RFC3779 data triggering an assertion failure.
718 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
719 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
720 [Rob Austein <sra@hactrn.net>]
722 *) Improved PRNG seeding for VOS.
723 [Paul Green <Paul.Green@stratus.com>]
725 *) Fix ssl_ciph.c set-up race.
726 [Adam Langley (Google)]
728 *) Fix spurious failures in ecdsatest.c.
729 [Emilia Käsper (Google)]
731 *) Fix the BIO_f_buffer() implementation (which was mixing different
732 interpretations of the '..._len' fields).
733 [Adam Langley (Google)]
735 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
736 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
737 threads won't reuse the same blinding coefficients.
739 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
740 lock to call BN_BLINDING_invert_ex, and avoids one use of
741 BN_BLINDING_update for each BN_BLINDING structure (previously,
742 the last update always remained unused).
743 [Emilia Käsper (Google)]
745 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
746 [Bob Buckholz (Google)]
748 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
750 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
751 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
752 [Kaspar Brand <ossl@velox.ch>]
754 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
755 for multi-threaded use of ECDH. (CVE-2011-3210)
756 [Adam Langley (Google)]
758 *) Fix x509_name_ex_d2i memory leak on bad inputs.
761 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
762 signature public key algorithm by using OID xref utilities instead.
763 Before this you could only use some ECC ciphersuites with SHA1 only.
766 *) Add protection against ECDSA timing attacks as mentioned in the paper
767 by Billy Bob Brumley and Nicola Tuveri, see:
769 http://eprint.iacr.org/2011/232.pdf
771 [Billy Bob Brumley and Nicola Tuveri]
773 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
775 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
776 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
778 *) Fix bug in string printing code: if *any* escaping is enabled we must
779 escape the escape character (backslash) or the resulting string is
783 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
785 *) Disable code workaround for ancient and obsolete Netscape browsers
786 and servers: an attacker can use it in a ciphersuite downgrade attack.
787 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
790 *) Fixed J-PAKE implementation error, originally discovered by
791 Sebastien Martini, further info and confirmation from Stefan
792 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
795 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
797 *) Fix extension code to avoid race conditions which can result in a buffer
798 overrun vulnerability: resumed sessions must not be modified as they can
799 be shared by multiple threads. CVE-2010-3864
802 *) Fix WIN32 build system to correctly link an ENGINE directory into
806 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
808 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
810 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
812 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
814 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
815 context. The operation can be customised via the ctrl mechanism in
816 case ENGINEs want to include additional functionality.
819 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
822 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
823 output hashes compatible with older versions of OpenSSL.
824 [Willy Weisz <weisz@vcpc.univie.ac.at>]
826 *) Fix compression algorithm handling: if resuming a session use the
827 compression algorithm of the resumed session instead of determining
828 it from client hello again. Don't allow server to change algorithm.
831 *) Add load_crls() function to apps tidying load_certs() too. Add option
832 to verify utility to allow additional CRLs to be included.
835 *) Update OCSP request code to permit adding custom headers to the request:
836 some responders need this.
839 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
841 [Julia Lawall <julia@diku.dk>]
843 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
844 needlessly dereferenced structures, used obsolete functions and
845 didn't handle all updated verify codes correctly.
848 *) Disable MD2 in the default configuration.
851 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
852 indicate the initial BIO being pushed or popped. This makes it possible
853 to determine whether the BIO is the one explicitly called or as a result
854 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
855 it handles reference counts correctly and doesn't zero out the I/O bio
856 when it is not being explicitly popped. WARNING: applications which
857 included workarounds for the old buggy behaviour will need to be modified
858 or they could free up already freed BIOs.
861 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
862 renaming to all platforms (within the 0.9.8 branch, this was
863 done conditionally on Netware platforms to avoid a name clash).
864 [Guenter <lists@gknw.net>]
866 *) Add ECDHE and PSK support to DTLS.
867 [Michael Tuexen <tuexen@fh-muenster.de>]
869 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
873 *) Add "missing" function EVP_MD_flags() (without this the only way to
874 retrieve a digest flags is by accessing the structure directly. Update
875 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
876 or cipher is registered as in the "from" argument. Print out all
877 registered digests in the dgst usage message instead of manually
878 attempting to work them out.
881 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
882 this allows the use of compression and extensions. Change default cipher
883 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
884 by default unless an application cipher string requests it.
887 *) Alter match criteria in PKCS12_parse(). It used to try to use local
888 key ids to find matching certificates and keys but some PKCS#12 files
889 don't follow the (somewhat unwritten) rules and this strategy fails.
890 Now just gather all certificates together and the first private key
891 then look for the first certificate that matches the key.
894 *) Support use of registered digest and cipher names for dgst and cipher
895 commands instead of having to add each one as a special case. So now
902 openssl dgst -sha256 foo
904 and this works for ENGINE based algorithms too.
908 *) Update Gost ENGINE to support parameter files.
909 [Victor B. Wagner <vitus@cryptocom.ru>]
911 *) Support GeneralizedTime in ca utility.
912 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
914 *) Enhance the hash format used for certificate directory links. The new
915 form uses the canonical encoding (meaning equivalent names will work
916 even if they aren't identical) and uses SHA1 instead of MD5. This form
917 is incompatible with the older format and as a result c_rehash should
918 be used to rebuild symbolic links.
921 *) Make PKCS#8 the default write format for private keys, replacing the
922 traditional format. This form is standardised, more secure and doesn't
923 include an implicit MD5 dependency.
926 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
927 committed to OpenSSL should pass this lot as a minimum.
930 *) Add session ticket override functionality for use by EAP-FAST.
931 [Jouni Malinen <j@w1.fi>]
933 *) Modify HMAC functions to return a value. Since these can be implemented
934 in an ENGINE errors can occur.
937 *) Type-checked OBJ_bsearch_ex.
940 *) Type-checked OBJ_bsearch. Also some constification necessitated
941 by type-checking. Still to come: TXT_DB, bsearch(?),
942 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
946 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
947 seconds to a tm structure directly, instead of going through OS
948 specific date routines. This avoids any issues with OS routines such
949 as the year 2038 bug. New *_adj() functions for ASN1 time structures
950 and X509_time_adj_ex() to cover the extended range. The existing
951 X509_time_adj() is still usable and will no longer have any date issues.
954 *) Delta CRL support. New use deltas option which will attempt to locate
955 and search any appropriate delta CRLs available.
957 This work was sponsored by Google.
960 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
961 code and add additional score elements. Validate alternate CRL paths
962 as part of the CRL checking and indicate a new error "CRL path validation
963 error" in this case. Applications wanting additional details can use
964 the verify callback and check the new "parent" field. If this is not
965 NULL CRL path validation is taking place. Existing applications wont
966 see this because it requires extended CRL support which is off by
969 This work was sponsored by Google.
972 *) Support for freshest CRL extension.
974 This work was sponsored by Google.
977 *) Initial indirect CRL support. Currently only supported in the CRLs
978 passed directly and not via lookup. Process certificate issuer
979 CRL entry extension and lookup CRL entries by bother issuer name
980 and serial number. Check and process CRL issuer entry in IDP extension.
982 This work was sponsored by Google.
985 *) Add support for distinct certificate and CRL paths. The CRL issuer
986 certificate is validated separately in this case. Only enabled if
987 an extended CRL support flag is set: this flag will enable additional
988 CRL functionality in future.
990 This work was sponsored by Google.
993 *) Add support for policy mappings extension.
995 This work was sponsored by Google.
998 *) Fixes to pathlength constraint, self issued certificate handling,
999 policy processing to align with RFC3280 and PKITS tests.
1001 This work was sponsored by Google.
1004 *) Support for name constraints certificate extension. DN, email, DNS
1005 and URI types are currently supported.
1007 This work was sponsored by Google.
1010 *) To cater for systems that provide a pointer-based thread ID rather
1011 than numeric, deprecate the current numeric thread ID mechanism and
1012 replace it with a structure and associated callback type. This
1013 mechanism allows a numeric "hash" to be extracted from a thread ID in
1014 either case, and on platforms where pointers are larger than 'long',
1015 mixing is done to help ensure the numeric 'hash' is usable even if it
1016 can't be guaranteed unique. The default mechanism is to use "&errno"
1017 as a pointer-based thread ID to distinguish between threads.
1019 Applications that want to provide their own thread IDs should now use
1020 CRYPTO_THREADID_set_callback() to register a callback that will call
1021 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
1023 Note that ERR_remove_state() is now deprecated, because it is tied
1024 to the assumption that thread IDs are numeric. ERR_remove_state(0)
1025 to free the current thread's error state should be replaced by
1026 ERR_remove_thread_state(NULL).
1028 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
1029 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
1030 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
1031 application was previously providing a numeric thread callback that
1032 was inappropriate for distinguishing threads, then uniqueness might
1033 have been obtained with &errno that happened immediately in the
1034 intermediate development versions of OpenSSL; this is no longer the
1035 case, the numeric thread callback will now override the automatic use
1037 [Geoff Thorpe, with help from Bodo Moeller]
1039 *) Initial support for different CRL issuing certificates. This covers a
1040 simple case where the self issued certificates in the chain exist and
1041 the real CRL issuer is higher in the existing chain.
1043 This work was sponsored by Google.
1046 *) Removed effectively defunct crypto/store from the build.
1049 *) Revamp of STACK to provide stronger type-checking. Still to come:
1050 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
1051 ASN1_STRING, CONF_VALUE.
1054 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
1055 RAM on SSL connections. This option can save about 34k per idle SSL.
1058 *) Revamp of LHASH to provide stronger type-checking. Still to come:
1059 STACK, TXT_DB, bsearch, qsort.
1062 *) Initial support for Cryptographic Message Syntax (aka CMS) based
1063 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
1064 support for data, signedData, compressedData, digestedData and
1065 encryptedData, envelopedData types included. Scripts to check against
1066 RFC4134 examples draft and interop and consistency checks of many
1067 content types and variants.
1070 *) Add options to enc utility to support use of zlib compression BIO.
1073 *) Extend mk1mf to support importing of options and assembly language
1074 files from Configure script, currently only included in VC-WIN32.
1075 The assembly language rules can now optionally generate the source
1076 files from the associated perl scripts.
1079 *) Implement remaining functionality needed to support GOST ciphersuites.
1080 Interop testing has been performed using CryptoPro implementations.
1081 [Victor B. Wagner <vitus@cryptocom.ru>]
1083 *) s390x assembler pack.
1086 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
1090 *) Implement Opaque PRF Input TLS extension as specified in
1091 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
1092 official specification yet and no extension type assignment by
1093 IANA exists, this extension (for now) will have to be explicitly
1094 enabled when building OpenSSL by providing the extension number
1095 to use. For example, specify an option
1097 -DTLSEXT_TYPE_opaque_prf_input=0x9527
1099 to the "config" or "Configure" script to enable the extension,
1100 assuming extension number 0x9527 (which is a completely arbitrary
1101 and unofficial assignment based on the MD5 hash of the Internet
1102 Draft). Note that by doing so, you potentially lose
1103 interoperability with other TLS implementations since these might
1104 be using the same extension number for other purposes.
1106 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
1107 opaque PRF input value to use in the handshake. This will create
1108 an interal copy of the length-'len' string at 'src', and will
1109 return non-zero for success.
1111 To get more control and flexibility, provide a callback function
1114 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
1115 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
1119 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
1122 Callback function 'cb' will be called in handshakes, and is
1123 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
1124 Argument 'arg' is for application purposes (the value as given to
1125 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
1126 be provided to the callback function). The callback function
1127 has to return non-zero to report success: usually 1 to use opaque
1128 PRF input just if possible, or 2 to enforce use of the opaque PRF
1129 input. In the latter case, the library will abort the handshake
1130 if opaque PRF input is not successfully negotiated.
1132 Arguments 'peerinput' and 'len' given to the callback function
1133 will always be NULL and 0 in the case of a client. A server will
1134 see the client's opaque PRF input through these variables if
1135 available (NULL and 0 otherwise). Note that if the server
1136 provides an opaque PRF input, the length must be the same as the
1137 length of the client's opaque PRF input.
1139 Note that the callback function will only be called when creating
1140 a new session (session resumption can resume whatever was
1141 previously negotiated), and will not be called in SSL 2.0
1142 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
1143 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
1144 for applications that need to enforce opaque PRF input.
1148 *) Update ssl code to support digests other than SHA1+MD5 for handshake
1151 [Victor B. Wagner <vitus@cryptocom.ru>]
1153 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1154 RFC4507bis. The encrypted ticket format is an encrypted encoded
1155 SSL_SESSION structure, that way new session features are automatically
1158 If a client application caches session in an SSL_SESSION structure
1159 support is transparent because tickets are now stored in the encoded
1162 The SSL_CTX structure automatically generates keys for ticket
1163 protection in servers so again support should be possible
1164 with no application modification.
1166 If a client or server wishes to disable RFC4507 support then the option
1167 SSL_OP_NO_TICKET can be set.
1169 Add a TLS extension debugging callback to allow the contents of any client
1170 or server extensions to be examined.
1172 This work was sponsored by Google.
1175 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
1176 OpenSSL should now compile cleanly on gcc 4.2
1177 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
1179 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
1180 support including streaming MAC support: this is required for GOST
1181 ciphersuite support.
1182 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
1184 *) Add option -stream to use PKCS#7 streaming in smime utility. New
1185 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
1186 to output in BER and PEM format.
1189 *) Experimental support for use of HMAC via EVP_PKEY interface. This
1190 allows HMAC to be handled via the EVP_DigestSign*() interface. The
1191 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
1192 ENGINE support for HMAC keys which are unextractable. New -mac and
1193 -macopt options to dgst utility.
1196 *) New option -sigopt to dgst utility. Update dgst to use
1197 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
1198 alternative signing paramaters such as X9.31 or PSS in the dgst
1202 *) Change ssl_cipher_apply_rule(), the internal function that does
1203 the work each time a ciphersuite string requests enabling
1204 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
1205 removing ("!foo+bar") a class of ciphersuites: Now it maintains
1206 the order of disabled ciphersuites such that those ciphersuites
1207 that most recently went from enabled to disabled not only stay
1208 in order with respect to each other, but also have higher priority
1209 than other disabled ciphersuites the next time ciphersuites are
1212 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
1213 the same ciphersuites as with "HIGH" alone, but in a specific
1214 order where the PSK ciphersuites come first (since they are the
1215 most recently disabled ciphersuites when "HIGH" is parsed).
1217 Also, change ssl_create_cipher_list() (using this new
1218 funcionality) such that between otherwise identical
1219 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
1223 *) Change ssl_create_cipher_list() so that it automatically
1224 arranges the ciphersuites in reasonable order before starting
1225 to process the rule string. Thus, the definition for "DEFAULT"
1226 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
1227 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
1228 This makes it much easier to arrive at a reasonable default order
1229 in applications for which anonymous ciphers are OK (meaning
1230 that you can't actually use DEFAULT).
1231 [Bodo Moeller; suggested by Victor Duchovni]
1233 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
1234 processing) into multiple integers instead of setting
1235 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
1236 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
1237 (These masks as well as the individual bit definitions are hidden
1238 away into the non-exported interface ssl/ssl_locl.h, so this
1239 change to the definition of the SSL_CIPHER structure shouldn't
1240 affect applications.) This give us more bits for each of these
1241 categories, so there is no longer a need to coagulate AES128 and
1242 AES256 into a single algorithm bit, and to coagulate Camellia128
1243 and Camellia256 into a single algorithm bit, which has led to all
1246 Thus, among other things, the kludge introduced in 0.9.7m and
1247 0.9.8e for masking out AES256 independently of AES128 or masking
1248 out Camellia256 independently of AES256 is not needed here in 0.9.9.
1250 With the change, we also introduce new ciphersuite aliases that
1251 so far were missing: "AES128", "AES256", "CAMELLIA128", and
1255 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
1256 Use the leftmost N bytes of the signature input if the input is
1257 larger than the prime q (with N being the size in bytes of q).
1260 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
1261 it yet and it is largely untested.
1264 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
1267 *) Initial incomplete changes to avoid need for function casts in OpenSSL
1268 some compilers (gcc 4.2 and later) reject their use. Safestack is
1269 reimplemented. Update ASN1 to avoid use of legacy functions.
1272 *) Win32/64 targets are linked with Winsock2.
1275 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
1276 to external functions. This can be used to increase CRL handling
1277 efficiency especially when CRLs are very large by (for example) storing
1278 the CRL revoked certificates in a database.
1281 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
1282 new CRLs added to a directory can be used. New command line option
1283 -verify_return_error to s_client and s_server. This causes real errors
1284 to be returned by the verify callback instead of carrying on no matter
1285 what. This reflects the way a "real world" verify callback would behave.
1288 *) GOST engine, supporting several GOST algorithms and public key formats.
1289 Kindly donated by Cryptocom.
1292 *) Partial support for Issuing Distribution Point CRL extension. CRLs
1293 partitioned by DP are handled but no indirect CRL or reason partitioning
1294 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
1295 selected via a scoring technique which handles IDP and AKID in CRLs.
1298 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
1299 will ultimately be used for all verify operations: this will remove the
1300 X509_STORE dependency on certificate verification and allow alternative
1301 lookup methods. X509_STORE based implementations of these two callbacks.
1304 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
1305 Modify get_crl() to find a valid (unexpired) CRL if possible.
1308 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
1309 this would be called X509_CRL_cmp() but that name is already used by
1310 a function that just compares CRL issuer names. Cache several CRL
1311 extensions in X509_CRL structure and cache CRLDP in X509.
1314 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
1315 this maps equivalent X509_NAME structures into a consistent structure.
1316 Name comparison can then be performed rapidly using memcmp().
1319 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
1323 *) Allow digests to supply their own micalg string for S/MIME type using
1324 the ctrl EVP_MD_CTRL_MICALG.
1327 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
1328 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
1329 ctrl. It can then customise the structure before and/or after signing
1333 *) New function OBJ_add_sigid() to allow application defined signature OIDs
1334 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
1335 to free up any added signature OIDs.
1338 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
1339 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
1340 digest and cipher tables. New options added to openssl utility:
1341 list-message-digest-algorithms and list-cipher-algorithms.
1344 *) Change the array representation of binary polynomials: the list
1345 of degrees of non-zero coefficients is now terminated with -1.
1346 Previously it was terminated with 0, which was also part of the
1347 value; thus, the array representation was not applicable to
1348 polynomials where t^0 has coefficient zero. This change makes
1349 the array representation useful in a more general context.
1352 *) Various modifications and fixes to SSL/TLS cipher string
1353 handling. For ECC, the code now distinguishes between fixed ECDH
1354 with RSA certificates on the one hand and with ECDSA certificates
1355 on the other hand, since these are separate ciphersuites. The
1356 unused code for Fortezza ciphersuites has been removed.
1358 For consistency with EDH, ephemeral ECDH is now called "EECDH"
1359 (not "ECDHE"). For consistency with the code for DH
1360 certificates, use of ECDH certificates is now considered ECDH
1361 authentication, not RSA or ECDSA authentication (the latter is
1362 merely the CA's signing algorithm and not actively used in the
1365 The temporary ciphersuite alias "ECCdraft" is no longer
1366 available, and ECC ciphersuites are no longer excluded from "ALL"
1367 and "DEFAULT". The following aliases now exist for RFC 4492
1368 ciphersuites, most of these by analogy with the DH case:
1370 kECDHr - ECDH cert, signed with RSA
1371 kECDHe - ECDH cert, signed with ECDSA
1372 kECDH - ECDH cert (signed with either RSA or ECDSA)
1373 kEECDH - ephemeral ECDH
1374 ECDH - ECDH cert or ephemeral ECDH
1380 AECDH - anonymous ECDH
1381 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
1385 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
1386 Use correct micalg parameters depending on digest(s) in signed message.
1389 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
1390 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
1393 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
1394 an engine to register a method. Add ENGINE lookups for methods and
1395 functional reference processing.
1398 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
1399 EVP_{Sign,Verify}* which allow an application to customise the signature
1403 *) New -resign option to smime utility. This adds one or more signers
1404 to an existing PKCS#7 signedData structure. Also -md option to use an
1405 alternative message digest algorithm for signing.
1408 *) Tidy up PKCS#7 routines and add new functions to make it easier to
1409 create PKCS7 structures containing multiple signers. Update smime
1410 application to support multiple signers.
1413 *) New -macalg option to pkcs12 utility to allow setting of an alternative
1417 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
1418 Reorganize PBE internals to lookup from a static table using NIDs,
1419 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
1420 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
1421 PRF which will be automatically used with PBES2.
1424 *) Replace the algorithm specific calls to generate keys in "req" with the
1428 *) Update PKCS#7 enveloped data routines to use new API. This is now
1429 supported by any public key method supporting the encrypt operation. A
1430 ctrl is added to allow the public key algorithm to examine or modify
1431 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
1435 *) Add a ctrl to asn1 method to allow a public key algorithm to express
1436 a default digest type to use. In most cases this will be SHA1 but some
1437 algorithms (such as GOST) need to specify an alternative digest. The
1438 return value indicates how strong the prefernce is 1 means optional and
1439 2 is mandatory (that is it is the only supported type). Modify
1440 ASN1_item_sign() to accept a NULL digest argument to indicate it should
1441 use the default md. Update openssl utilities to use the default digest
1442 type for signing if it is not explicitly indicated.
1445 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
1446 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
1447 signing method from the key type. This effectively removes the link
1448 between digests and public key types.
1451 *) Add an OID cross reference table and utility functions. Its purpose is to
1452 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
1453 rsaEncryption. This will allow some of the algorithm specific hackery
1454 needed to use the correct OID to be removed.
1457 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
1458 structures for PKCS7_sign(). They are now set up by the relevant public
1462 *) Add provisional EC pkey method with support for ECDSA and ECDH.
1465 *) Add support for key derivation (agreement) in the API, DH method and
1469 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
1470 public and private key formats. As a side effect these add additional
1471 command line functionality not previously available: DSA signatures can be
1472 generated and verified using pkeyutl and DH key support and generation in
1477 [Oliver Tappe <zooey@hirschkaefer.de>]
1479 *) New make target "install_html_docs" installs HTML renditions of the
1481 [Oliver Tappe <zooey@hirschkaefer.de>]
1483 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
1484 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
1485 support key and parameter generation and add initial key generation
1486 functionality for RSA.
1489 *) Add functions for main EVP_PKEY_method operations. The undocumented
1490 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
1491 EVP_PKEY_{encrypt,decrypt}_old.
1494 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
1495 key API, doesn't do much yet.
1498 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
1499 public key algorithms. New option to openssl utility:
1500 "list-public-key-algorithms" to print out info.
1503 *) Implement the Supported Elliptic Curves Extension for
1504 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1507 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
1508 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
1511 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
1512 utilities such as rsa, dsa, dsaparam etc except they process any key
1516 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
1517 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
1518 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
1522 *) Initial support for pluggable public key ASN1.
1523 De-spaghettify the public key ASN1 handling. Move public and private
1524 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
1525 algorithm specific handling to a single module within the relevant
1526 algorithm directory. Add functions to allow (near) opaque processing
1527 of public and private key structures.
1530 *) Implement the Supported Point Formats Extension for
1531 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1534 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
1535 for the psk identity [hint] and the psk callback functions to the
1536 SSL_SESSION, SSL and SSL_CTX structure.
1539 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
1543 SSL_CTX_use_psk_identity_hint
1544 SSL_get_psk_identity_hint
1545 SSL_get_psk_identity
1546 SSL_use_psk_identity_hint
1548 [Mika Kousa and Pasi Eronen of Nokia Corporation]
1550 *) Add RFC 3161 compliant time stamp request creation, response generation
1551 and response verification functionality.
1552 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
1554 *) Add initial support for TLS extensions, specifically for the server_name
1555 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1556 have new members for a host name. The SSL data structure has an
1557 additional member SSL_CTX *initial_ctx so that new sessions can be
1558 stored in that context to allow for session resumption, even after the
1559 SSL has been switched to a new SSL_CTX in reaction to a client's
1560 server_name extension.
1562 New functions (subject to change):
1564 SSL_get_servername()
1565 SSL_get_servername_type()
1568 New CTRL codes and macros (subject to change):
1570 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1571 - SSL_CTX_set_tlsext_servername_callback()
1572 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1573 - SSL_CTX_set_tlsext_servername_arg()
1574 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1576 openssl s_client has a new '-servername ...' option.
1578 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1579 '-key2 ...', '-servername_fatal' (subject to change). This allows
1580 testing the HostName extension for a specific single host name ('-cert'
1581 and '-key' remain fallbacks for handshakes without HostName
1582 negotiation). If the unrecogninzed_name alert has to be sent, this by
1583 default is a warning; it becomes fatal with the '-servername_fatal'
1586 [Peter Sylvester, Remy Allais, Christophe Renou]
1588 *) Whirlpool hash implementation is added.
1591 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
1592 bn(64,32). Because of instruction set limitations it doesn't have
1593 any negative impact on performance. This was done mostly in order
1594 to make it possible to share assembler modules, such as bn_mul_mont
1595 implementations, between 32- and 64-bit builds without hassle.
1598 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
1599 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
1603 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
1604 dedicated Montgomery multiplication procedure, is introduced.
1605 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
1606 "64-bit" performance on certain 32-bit targets.
1609 *) New option SSL_OP_NO_COMP to disable use of compression selectively
1610 in SSL structures. New SSL ctrl to set maximum send fragment size.
1611 Save memory by seeting the I/O buffer sizes dynamically instead of
1612 using the maximum available value.
1615 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
1616 in addition to the text details.
1619 *) Very, very preliminary EXPERIMENTAL support for printing of general
1620 ASN1 structures. This currently produces rather ugly output and doesn't
1621 handle several customised structures at all.
1624 *) Integrated support for PVK file format and some related formats such
1625 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
1626 these in the 'rsa' and 'dsa' utilities.
1629 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
1632 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
1633 place for the (very old) "NETSCAPE" format certificates which are now
1634 handled using new ASN1 code equivalents.
1637 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
1638 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
1639 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
1642 *) Modify CRL distribution points extension code to print out previously
1643 unsupported fields. Enhance extension setting code to allow setting of
1647 *) Add print and set support for Issuing Distribution Point CRL extension.
1650 *) Change 'Configure' script to enable Camellia by default.
1653 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
1655 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1656 Thanks to Antonio Martin, Enterprise Secure Access Research and
1657 Development, Cisco Systems, Inc. for discovering this bug and
1658 preparing a fix. (CVE-2012-0050)
1661 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
1663 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1664 of the Vaudenay padding oracle attack on CBC mode encryption
1665 which enables an efficient plaintext recovery attack against
1666 the OpenSSL implementation of DTLS. Their attack exploits timing
1667 differences arising during decryption processing. A research
1668 paper describing this attack can be found at:
1669 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1670 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1671 Security Group at Royal Holloway, University of London
1672 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1673 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1674 for preparing the fix. (CVE-2011-4108)
1675 [Robin Seggelmann, Michael Tuexen]
1677 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
1678 [Ben Laurie, Kasper <ekasper@google.com>]
1680 *) Clear bytes used for block padding of SSL 3.0 records.
1682 [Adam Langley (Google)]
1684 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1685 Kadianakis <desnacked@gmail.com> for discovering this issue and
1686 Adam Langley for preparing the fix. (CVE-2011-4619)
1687 [Adam Langley (Google)]
1689 *) Prevent malformed RFC3779 data triggering an assertion failure.
1690 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1691 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1692 [Rob Austein <sra@hactrn.net>]
1694 *) Fix ssl_ciph.c set-up race.
1695 [Adam Langley (Google)]
1697 *) Fix spurious failures in ecdsatest.c.
1698 [Emilia Käsper (Google)]
1700 *) Fix the BIO_f_buffer() implementation (which was mixing different
1701 interpretations of the '..._len' fields).
1702 [Adam Langley (Google)]
1704 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1705 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1706 threads won't reuse the same blinding coefficients.
1708 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1709 lock to call BN_BLINDING_invert_ex, and avoids one use of
1710 BN_BLINDING_update for each BN_BLINDING structure (previously,
1711 the last update always remained unused).
1712 [Emilia Käsper (Google)]
1714 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1715 for multi-threaded use of ECDH.
1716 [Adam Langley (Google)]
1718 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1721 *) Add protection against ECDSA timing attacks as mentioned in the paper
1722 by Billy Bob Brumley and Nicola Tuveri, see:
1724 http://eprint.iacr.org/2011/232.pdf
1726 [Billy Bob Brumley and Nicola Tuveri]
1728 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
1730 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1731 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1733 *) Fix bug in string printing code: if *any* escaping is enabled we must
1734 escape the escape character (backslash) or the resulting string is
1738 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
1740 *) Disable code workaround for ancient and obsolete Netscape browsers
1741 and servers: an attacker can use it in a ciphersuite downgrade attack.
1742 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1745 *) Fixed J-PAKE implementation error, originally discovered by
1746 Sebastien Martini, further info and confirmation from Stefan
1747 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1750 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
1752 *) Fix extension code to avoid race conditions which can result in a buffer
1753 overrun vulnerability: resumed sessions must not be modified as they can
1754 be shared by multiple threads. CVE-2010-3864
1757 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
1760 *) Don't reencode certificate when calculating signature: cache and use
1761 the original encoding instead. This makes signature verification of
1762 some broken encodings work correctly.
1765 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
1766 is also one of the inputs.
1767 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
1769 *) Don't repeatedly append PBE algorithms to table if they already exist.
1770 Sort table on each new add. This effectively makes the table read only
1771 after all algorithms are added and subsequent calls to PKCS12_pbe_add
1775 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
1777 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
1780 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
1781 access or freeing data twice (CVE-2010-0742)
1782 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
1784 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
1785 common in certificates and some applications which only call
1786 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
1790 Reduce copying into .apps and .test in makevms.com
1791 Don't try to use blank CA certificate in CA.com
1792 Allow use of C files from original directories in maketests.com
1793 [Steven M. Schweda" <sms@antinode.info>]
1795 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
1797 *) When rejecting SSL/TLS records due to an incorrect version number, never
1798 update s->server with a new major version number. As of
1799 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
1800 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
1801 the previous behavior could result in a read attempt at NULL when
1802 receiving specific incorrect SSL/TLS records once record payload
1803 protection is active. (CVE-2010-0740)
1804 [Bodo Moeller, Adam Langley <agl@chromium.org>]
1806 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
1807 could be crashed if the relevant tables were not present (e.g. chrooted).
1808 [Tomas Hoger <thoger@redhat.com>]
1810 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
1812 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
1813 [Martin Olsson, Neel Mehta]
1815 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
1816 accommodate for stack sorting, always a write lock!).
1819 *) On some versions of WIN32 Heap32Next is very slow. This can cause
1820 excessive delays in the RAND_poll(): over a minute. As a workaround
1821 include a time check in the inner Heap32Next loop too.
1824 *) The code that handled flushing of data in SSL/TLS originally used the
1825 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
1826 the problem outlined in PR#1949. The fix suggested there however can
1827 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
1828 of Apache). So instead simplify the code to flush unconditionally.
1829 This should be fine since flushing with no data to flush is a no op.
1832 *) Handle TLS versions 2.0 and later properly and correctly use the
1833 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
1834 off ancient servers have a habit of sticking around for a while...
1837 *) Modify compression code so it frees up structures without using the
1838 ex_data callbacks. This works around a problem where some applications
1839 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
1840 restarting) then use compression (e.g. SSL with compression) later.
1841 This results in significant per-connection memory leaks and
1842 has caused some security issues including CVE-2008-1678 and
1846 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
1847 change when encrypting or decrypting.
1850 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
1851 connect and renegotiate with servers which do not support RI.
1852 Until RI is more widely deployed this option is enabled by default.
1855 *) Add "missing" ssl ctrls to clear options and mode.
1858 *) If client attempts to renegotiate and doesn't support RI respond with
1859 a no_renegotiation alert as required by RFC5746. Some renegotiating
1860 TLS clients will continue a connection gracefully when they receive
1861 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1862 waiting for a server hello which it will never receive. Now we treat a
1863 received no_renegotiation alert as a fatal error. This is because
1864 applications requesting a renegotiation might well expect it to succeed
1865 and would have no code in place to handle the server denying it so the
1866 only safe thing to do is to terminate the connection.
1869 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1870 peer supports secure renegotiation and 0 otherwise. Print out peer
1871 renegotiation support in s_client/s_server.
1874 *) Replace the highly broken and deprecated SPKAC certification method with
1875 the updated NID creation version. This should correctly handle UTF8.
1878 *) Implement RFC5746. Re-enable renegotiation but require the extension
1879 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1880 turns out to be a bad idea. It has been replaced by
1881 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1882 SSL_CTX_set_options(). This is really not recommended unless you
1883 know what you are doing.
1884 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1886 *) Fixes to stateless session resumption handling. Use initial_ctx when
1887 issuing and attempting to decrypt tickets in case it has changed during
1888 servername handling. Use a non-zero length session ID when attempting
1889 stateless session resumption: this makes it possible to determine if
1890 a resumption has occurred immediately after receiving server hello
1891 (several places in OpenSSL subtly assume this) instead of later in
1895 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1896 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1897 fixes for a few places where the return code is not checked
1899 [Julia Lawall <julia@diku.dk>]
1901 *) Add --strict-warnings option to Configure script to include devteam
1902 warnings in other configurations.
1905 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1906 makes it possible to install openssl libraries in locations which
1907 have names other than "lib", for example "/usr/lib64" which some
1909 [Steve Henson, based on patch from Jeremy Utley]
1911 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1912 X690 8.9.12 and can produce some misleading textual output of OIDs.
1913 [Steve Henson, reported by Dan Kaminsky]
1915 *) Delete MD2 from algorithm tables. This follows the recommendation in
1916 several standards that it is not used in new applications due to
1917 several cryptographic weaknesses. For binary compatibility reasons
1918 the MD2 API is still compiled in by default.
1921 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1925 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1926 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1928 [Guenter <lists@gknw.net>]
1930 *) Fix the server certificate chain building code to use X509_verify_cert(),
1931 it used to have an ad-hoc builder which was unable to cope with anything
1932 other than a simple chain.
1933 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1935 *) Don't check self signed certificate signatures in X509_verify_cert()
1936 by default (a flag can override this): it just wastes time without
1937 adding any security. As a useful side effect self signed root CAs
1938 with non-FIPS digests are now usable in FIPS mode.
1941 *) In dtls1_process_out_of_seq_message() the check if the current message
1942 is already buffered was missing. For every new message was memory
1943 allocated, allowing an attacker to perform an denial of service attack
1944 with sending out of seq handshake messages until there is no memory
1945 left. Additionally every future messege was buffered, even if the
1946 sequence number made no sense and would be part of another handshake.
1947 So only messages with sequence numbers less than 10 in advance will be
1948 buffered. (CVE-2009-1378)
1949 [Robin Seggelmann, discovered by Daniel Mentz]
1951 *) Records are buffered if they arrive with a future epoch to be
1952 processed after finishing the corresponding handshake. There is
1953 currently no limitation to this buffer allowing an attacker to perform
1954 a DOS attack with sending records with future epochs until there is no
1955 memory left. This patch adds the pqueue_size() function to detemine
1956 the size of a buffer and limits the record buffer to 100 entries.
1958 [Robin Seggelmann, discovered by Daniel Mentz]
1960 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
1961 parent structure is freed. (CVE-2009-1379)
1964 *) Handle non-blocking I/O properly in SSL_shutdown() call.
1965 [Darryl Miles <darryl-mailinglists@netbauds.net>]
1968 [Ilya O. <vrghost@gmail.com>]
1970 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
1972 *) Disable renegotiation completely - this fixes a severe security
1973 problem (CVE-2009-3555) at the cost of breaking all
1974 renegotiation. Renegotiation can be re-enabled by setting
1975 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
1976 run-time. This is really not recommended unless you know what
1980 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
1982 *) Don't set val to NULL when freeing up structures, it is freed up by
1983 underlying code. If sizeof(void *) > sizeof(long) this can result in
1984 zeroing past the valid field. (CVE-2009-0789)
1985 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
1987 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
1988 checked correctly. This would allow some invalid signed attributes to
1989 appear to verify correctly. (CVE-2009-0591)
1990 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1992 *) Reject UniversalString and BMPString types with invalid lengths. This
1993 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
1994 a legal length. (CVE-2009-0590)
1997 *) Set S/MIME signing as the default purpose rather than setting it
1998 unconditionally. This allows applications to override it at the store
2002 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2003 to handle some structures.
2006 *) Improve efficiency of mem_gets: don't search whole buffer each time
2008 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2010 *) New -hex option for openssl rand.
2013 *) Print out UTF8String and NumericString when parsing ASN1.
2016 *) Support NumericString type for name components.
2019 *) Allow CC in the environment to override the automatically chosen
2020 compiler. Note that nothing is done to ensure flags work with the
2024 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2026 *) Properly check EVP_VerifyFinal() and similar return values
2028 [Ben Laurie, Bodo Moeller, Google Security Team]
2030 *) Enable TLS extensions by default.
2033 *) Allow the CHIL engine to be loaded, whether the application is
2034 multithreaded or not. (This does not release the developer from the
2035 obligation to set up the dynamic locking callbacks.)
2036 [Sander Temme <sander@temme.net>]
2038 *) Use correct exit code if there is an error in dgst command.
2039 [Steve Henson; problem pointed out by Roland Dirlewanger]
2041 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2042 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2045 *) Add experimental JPAKE support, including demo authentication in
2046 s_client and s_server.
2049 *) Set the comparison function in v3_addr_canonize().
2050 [Rob Austein <sra@hactrn.net>]
2052 *) Add support for XMPP STARTTLS in s_client.
2053 [Philip Paeps <philip@freebsd.org>]
2055 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2056 to ensure that even with this option, only ciphersuites in the
2057 server's preference list will be accepted. (Note that the option
2058 applies only when resuming a session, so the earlier behavior was
2059 just about the algorithm choice for symmetric cryptography.)
2062 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2064 *) Fix NULL pointer dereference if a DTLS server received
2065 ChangeCipherSpec as first record (CVE-2009-1386).
2068 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
2069 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2072 *) The fix in 0.9.8c that supposedly got rid of unsafe
2073 double-checked locking was incomplete for RSA blinding,
2074 addressing just one layer of what turns out to have been
2075 doubly unsafe triple-checked locking.
2077 So now fix this for real by retiring the MONT_HELPER macro
2078 in crypto/rsa/rsa_eay.c.
2080 [Bodo Moeller; problem pointed out by Marius Schilder]
2082 *) Various precautionary measures:
2084 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2086 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2087 (NB: This would require knowledge of the secret session ticket key
2088 to exploit, in which case you'd be SOL either way.)
2090 - Change bn_nist.c so that it will properly handle input BIGNUMs
2091 outside the expected range.
2093 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2096 [Neel Mehta, Bodo Moeller]
2098 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2099 the load fails. Useful for distros.
2100 [Ben Laurie and the FreeBSD team]
2102 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2105 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2108 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2110 This work was sponsored by Logica.
2113 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2114 keystores. Support for SSL/TLS client authentication too.
2115 Not compiled unless enable-capieng specified to Configure.
2117 This work was sponsored by Logica.
2120 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2121 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2122 attribute creation routines such as certifcate requests and PKCS#12
2126 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2128 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2129 handshake which could lead to a cilent crash as found using the
2130 Codenomicon TLS test suite (CVE-2008-1672)
2131 [Steve Henson, Mark Cox]
2133 *) Fix double free in TLS server name extensions which could lead to
2134 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2137 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2139 Clear the error queue to ensure that error entries left from
2140 older function calls do not interfere with the correct operation.
2141 [Lutz Jaenicke, Erik de Castro Lopo]
2143 *) Remove root CA certificates of commercial CAs:
2145 The OpenSSL project does not recommend any specific CA and does not
2146 have any policy with respect to including or excluding any CA.
2147 Therefore it does not make any sense to ship an arbitrary selection
2148 of root CA certificates with the OpenSSL software.
2151 *) RSA OAEP patches to fix two separate invalid memory reads.
2152 The first one involves inputs when 'lzero' is greater than
2153 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
2154 before the beginning of from). The second one involves inputs where
2155 the 'db' section contains nothing but zeroes (there is a one-byte
2156 invalid read after the end of 'db').
2157 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2159 *) Partial backport from 0.9.9-dev:
2161 Introduce bn_mul_mont (dedicated Montgomery multiplication
2162 procedure) as a candidate for BIGNUM assembler implementation.
2163 While 0.9.9-dev uses assembler for various architectures, only
2164 x86_64 is available by default here in the 0.9.8 branch, and
2165 32-bit x86 is available through a compile-time setting.
2167 To try the 32-bit x86 assembler implementation, use Configure
2168 option "enable-montasm" (which exists only for this backport).
2170 As "enable-montasm" for 32-bit x86 disclaims code stability
2171 anyway, in this constellation we activate additional code
2172 backported from 0.9.9-dev for further performance improvements,
2173 namely BN_from_montgomery_word. (To enable this otherwise,
2174 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
2176 [Andy Polyakov (backport partially by Bodo Moeller)]
2178 *) Add TLS session ticket callback. This allows an application to set
2179 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
2180 values. This is useful for key rollover for example where several key
2181 sets may exist with different names.
2184 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
2185 This was broken until now in 0.9.8 releases, such that the only way
2186 a registered ENGINE could be used (assuming it initialises
2187 successfully on the host) was to explicitly set it as the default
2188 for the relevant algorithms. This is in contradiction with 0.9.7
2189 behaviour and the documentation. With this fix, when an ENGINE is
2190 registered into a given algorithm's table of implementations, the
2191 'uptodate' flag is reset so that auto-discovery will be used next
2192 time a new context for that algorithm attempts to select an
2194 [Ian Lister (tweaked by Geoff Thorpe)]
2196 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
2197 implemention in the following ways:
2199 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
2202 Lack of BER streaming support means one pass streaming processing is
2203 only supported if data is detached: setting the streaming flag is
2204 ignored for embedded content.
2206 CMS support is disabled by default and must be explicitly enabled
2207 with the enable-cms configuration option.
2210 *) Update the GMP engine glue to do direct copies between BIGNUM and
2211 mpz_t when openssl and GMP use the same limb size. Otherwise the
2212 existing "conversion via a text string export" trick is still used.
2213 [Paul Sheer <paulsheer@gmail.com>]
2215 *) Zlib compression BIO. This is a filter BIO which compressed and
2216 uncompresses any data passed through it.
2219 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
2220 RFC3394 compatible AES key wrapping.
2223 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
2224 sets string data without copying. X509_ALGOR_set0() and
2225 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
2226 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
2227 from an X509_ATTRIBUTE structure optionally checking it occurs only
2228 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
2232 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
2233 to get the expected BN_FLG_CONSTTIME behavior.
2234 [Bodo Moeller (Google)]
2238 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
2239 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
2240 - added some more tests to do_tests.pl
2241 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
2242 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
2243 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
2244 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
2245 - various changes to netware.pl to enable gcc-cross builds on Win32
2247 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
2248 - various changes to fix missing prototype warnings
2249 - fixed x86nasm.pl to create correct asm files for NASM COFF output
2250 - added AES, WHIRLPOOL and CPUID assembler code to build files
2251 - added missing AES assembler make rules to mk1mf.pl
2252 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
2253 [Guenter Knauf <eflash@gmx.net>]
2255 *) Implement certificate status request TLS extension defined in RFC3546.
2256 A client can set the appropriate parameters and receive the encoded
2257 OCSP response via a callback. A server can query the supplied parameters
2258 and set the encoded OCSP response in the callback. Add simplified examples
2259 to s_client and s_server.
2262 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
2264 *) Fix various bugs:
2265 + Binary incompatibility of ssl_ctx_st structure
2266 + DTLS interoperation with non-compliant servers
2267 + Don't call get_session_cb() without proposed session
2268 + Fix ia64 assembler code
2269 [Andy Polyakov, Steve Henson]
2271 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
2273 *) DTLS Handshake overhaul. There were longstanding issues with
2274 OpenSSL DTLS implementation, which were making it impossible for
2275 RFC 4347 compliant client to communicate with OpenSSL server.
2276 Unfortunately just fixing these incompatibilities would "cut off"
2277 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
2278 server keeps tolerating non RFC compliant syntax. The opposite is
2279 not true, 0.9.8f client can not communicate with earlier server.
2280 This update even addresses CVE-2007-4995.
2283 *) Changes to avoid need for function casts in OpenSSL: some compilers
2284 (gcc 4.2 and later) reject their use.
2285 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
2288 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2289 RFC4507bis. The encrypted ticket format is an encrypted encoded
2290 SSL_SESSION structure, that way new session features are automatically
2293 If a client application caches session in an SSL_SESSION structure
2294 support is transparent because tickets are now stored in the encoded
2297 The SSL_CTX structure automatically generates keys for ticket
2298 protection in servers so again support should be possible
2299 with no application modification.
2301 If a client or server wishes to disable RFC4507 support then the option
2302 SSL_OP_NO_TICKET can be set.
2304 Add a TLS extension debugging callback to allow the contents of any client
2305 or server extensions to be examined.
2307 This work was sponsored by Google.
2310 *) Add initial support for TLS extensions, specifically for the server_name
2311 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2312 have new members for a host name. The SSL data structure has an
2313 additional member SSL_CTX *initial_ctx so that new sessions can be
2314 stored in that context to allow for session resumption, even after the
2315 SSL has been switched to a new SSL_CTX in reaction to a client's
2316 server_name extension.
2318 New functions (subject to change):
2320 SSL_get_servername()
2321 SSL_get_servername_type()
2324 New CTRL codes and macros (subject to change):
2326 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2327 - SSL_CTX_set_tlsext_servername_callback()
2328 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2329 - SSL_CTX_set_tlsext_servername_arg()
2330 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2332 openssl s_client has a new '-servername ...' option.
2334 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2335 '-key2 ...', '-servername_fatal' (subject to change). This allows
2336 testing the HostName extension for a specific single host name ('-cert'
2337 and '-key' remain fallbacks for handshakes without HostName
2338 negotiation). If the unrecogninzed_name alert has to be sent, this by
2339 default is a warning; it becomes fatal with the '-servername_fatal'
2342 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
2344 *) Add AES and SSE2 assembly language support to VC++ build.
2347 *) Mitigate attack on final subtraction in Montgomery reduction.
2350 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
2351 (which previously caused an internal error).
2354 *) Squeeze another 10% out of IGE mode when in != out.
2357 *) AES IGE mode speedup.
2358 [Dean Gaudet (Google)]
2360 *) Add the Korean symmetric 128-bit cipher SEED (see
2361 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
2362 add SEED ciphersuites from RFC 4162:
2364 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
2365 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
2366 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
2367 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
2369 To minimize changes between patchlevels in the OpenSSL 0.9.8
2370 series, SEED remains excluded from compilation unless OpenSSL
2371 is configured with 'enable-seed'.
2372 [KISA, Bodo Moeller]
2374 *) Mitigate branch prediction attacks, which can be practical if a
2375 single processor is shared, allowing a spy process to extract
2376 information. For detailed background information, see
2377 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
2378 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
2379 and Necessary Software Countermeasures"). The core of the change
2380 are new versions BN_div_no_branch() and
2381 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
2382 respectively, which are slower, but avoid the security-relevant
2383 conditional branches. These are automatically called by BN_div()
2384 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
2385 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
2386 remove a conditional branch.
2388 BN_FLG_CONSTTIME is the new name for the previous
2389 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
2390 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
2391 in the exponent causes BN_mod_exp_mont() to use the alternative
2392 implementation in BN_mod_exp_mont_consttime().) The old name
2393 remains as a deprecated alias.
2395 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
2396 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
2397 constant-time implementations for more than just exponentiation.
2398 Here too the old name is kept as a deprecated alias.
2400 BN_BLINDING_new() will now use BN_dup() for the modulus so that
2401 the BN_BLINDING structure gets an independent copy of the
2402 modulus. This means that the previous "BIGNUM *m" argument to
2403 BN_BLINDING_new() and to BN_BLINDING_create_param() now
2404 essentially becomes "const BIGNUM *m", although we can't actually
2405 change this in the header file before 0.9.9. It allows
2406 RSA_setup_blinding() to use BN_with_flags() on the modulus to
2407 enable BN_FLG_CONSTTIME.
2409 [Matthew D Wood (Intel Corp)]
2411 *) In the SSL/TLS server implementation, be strict about session ID
2412 context matching (which matters if an application uses a single
2413 external cache for different purposes). Previously,
2414 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
2415 set. This did ensure strict client verification, but meant that,
2416 with applications using a single external cache for quite
2417 different requirements, clients could circumvent ciphersuite
2418 restrictions for a given session ID context by starting a session
2419 in a different context.
2422 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2423 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2424 authentication-only ciphersuites.
2427 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
2428 not complete and could lead to a possible single byte overflow
2429 (CVE-2007-5135) [Ben Laurie]
2431 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
2433 *) Since AES128 and AES256 (and similarly Camellia128 and
2434 Camellia256) share a single mask bit in the logic of
2435 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2436 kludge to work properly if AES128 is available and AES256 isn't
2437 (or if Camellia128 is available and Camellia256 isn't).
2440 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
2441 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
2442 When a point or a seed is encoded in a BIT STRING, we need to
2443 prevent the removal of trailing zero bits to get the proper DER
2444 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
2445 of a NamedBitList, for which trailing 0 bits need to be removed.)
2448 *) Have SSL/TLS server implementation tolerate "mismatched" record
2449 protocol version while receiving ClientHello even if the
2450 ClientHello is fragmented. (The server can't insist on the
2451 particular protocol version it has chosen before the ServerHello
2452 message has informed the client about his choice.)
2455 *) Add RFC 3779 support.
2456 [Rob Austein for ARIN, Ben Laurie]
2458 *) Load error codes if they are not already present instead of using a
2459 static variable. This allows them to be cleanly unloaded and reloaded.
2460 Improve header file function name parsing.
2463 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
2464 or CAPABILITY handshake as required by RFCs.
2467 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
2469 *) Introduce limits to prevent malicious keys being able to
2470 cause a denial of service. (CVE-2006-2940)
2471 [Steve Henson, Bodo Moeller]
2473 *) Fix ASN.1 parsing of certain invalid structures that can result
2474 in a denial of service. (CVE-2006-2937) [Steve Henson]
2476 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2477 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2479 *) Fix SSL client code which could crash if connecting to a
2480 malicious SSLv2 server. (CVE-2006-4343)
2481 [Tavis Ormandy and Will Drewry, Google Security Team]
2483 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
2484 match only those. Before that, "AES256-SHA" would be interpreted
2485 as a pattern and match "AES128-SHA" too (since AES128-SHA got
2486 the same strength classification in 0.9.7h) as we currently only
2487 have a single AES bit in the ciphersuite description bitmap.
2488 That change, however, also applied to ciphersuite strings such as
2489 "RC4-MD5" that intentionally matched multiple ciphersuites --
2490 namely, SSL 2.0 ciphersuites in addition to the more common ones
2491 from SSL 3.0/TLS 1.0.
2493 So we change the selection algorithm again: Naming an explicit
2494 ciphersuite selects this one ciphersuite, and any other similar
2495 ciphersuite (same bitmap) from *other* protocol versions.
2496 Thus, "RC4-MD5" again will properly select both the SSL 2.0
2497 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
2499 Since SSL 2.0 does not have any ciphersuites for which the
2500 128/256 bit distinction would be relevant, this works for now.
2501 The proper fix will be to use different bits for AES128 and
2502 AES256, which would have avoided the problems from the beginning;
2503 however, bits are scarce, so we can only do this in a new release
2504 (not just a patchlevel) when we can change the SSL_CIPHER
2505 definition to split the single 'unsigned long mask' bitmap into
2506 multiple values to extend the available space.
2510 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
2512 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2513 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2515 *) Add AES IGE and biIGE modes.
2518 *) Change the Unix randomness entropy gathering to use poll() when
2519 possible instead of select(), since the latter has some
2520 undesirable limitations.
2521 [Darryl Miles via Richard Levitte and Bodo Moeller]
2523 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
2524 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
2525 cannot be implicitly activated as part of, e.g., the "AES" alias.
2526 However, please upgrade to OpenSSL 0.9.9[-dev] for
2527 non-experimental use of the ECC ciphersuites to get TLS extension
2528 support, which is required for curve and point format negotiation
2529 to avoid potential handshake problems.
2532 *) Disable rogue ciphersuites:
2534 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
2535 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
2536 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
2538 The latter two were purportedly from
2539 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
2542 Also deactivate the remaining ciphersuites from
2543 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
2544 unofficial, and the ID has long expired.
2547 *) Fix RSA blinding Heisenbug (problems sometimes occured on
2548 dual-core machines) and other potential thread-safety issues.
2551 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
2552 versions), which is now available for royalty-free use
2553 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
2554 Also, add Camellia TLS ciphersuites from RFC 4132.
2556 To minimize changes between patchlevels in the OpenSSL 0.9.8
2557 series, Camellia remains excluded from compilation unless OpenSSL
2558 is configured with 'enable-camellia'.
2561 *) Disable the padding bug check when compression is in use. The padding
2562 bug check assumes the first packet is of even length, this is not
2563 necessarily true if compresssion is enabled and can result in false
2564 positives causing handshake failure. The actual bug test is ancient
2565 code so it is hoped that implementations will either have fixed it by
2566 now or any which still have the bug do not support compression.
2569 Changes between 0.9.8a and 0.9.8b [04 May 2006]
2571 *) When applying a cipher rule check to see if string match is an explicit
2572 cipher suite and only match that one cipher suite if it is.
2575 *) Link in manifests for VC++ if needed.
2576 [Austin Ziegler <halostatue@gmail.com>]
2578 *) Update support for ECC-based TLS ciphersuites according to
2579 draft-ietf-tls-ecc-12.txt with proposed changes (but without
2580 TLS extensions, which are supported starting with the 0.9.9
2581 branch, not in the OpenSSL 0.9.8 branch).
2584 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
2585 opaque EVP_CIPHER_CTX handling.
2588 *) Fixes and enhancements to zlib compression code. We now only use
2589 "zlib1.dll" and use the default __cdecl calling convention on Win32
2590 to conform with the standards mentioned here:
2591 http://www.zlib.net/DLL_FAQ.txt
2592 Static zlib linking now works on Windows and the new --with-zlib-include
2593 --with-zlib-lib options to Configure can be used to supply the location
2594 of the headers and library. Gracefully handle case where zlib library
2598 *) Several fixes and enhancements to the OID generation code. The old code
2599 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
2600 handle numbers larger than ULONG_MAX, truncated printing and had a
2601 non standard OBJ_obj2txt() behaviour.
2604 *) Add support for building of engines under engine/ as shared libraries
2605 under VC++ build system.
2608 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
2609 Hopefully, we will not see any false combination of paths any more.
2612 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
2614 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2615 (part of SSL_OP_ALL). This option used to disable the
2616 countermeasure against man-in-the-middle protocol-version
2617 rollback in the SSL 2.0 server implementation, which is a bad
2618 idea. (CVE-2005-2969)
2620 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2621 for Information Security, National Institute of Advanced Industrial
2622 Science and Technology [AIST], Japan)]
2624 *) Add two function to clear and return the verify parameter flags.
2627 *) Keep cipherlists sorted in the source instead of sorting them at
2628 runtime, thus removing the need for a lock.
2631 *) Avoid some small subgroup attacks in Diffie-Hellman.
2632 [Nick Mathewson and Ben Laurie]
2634 *) Add functions for well-known primes.
2637 *) Extended Windows CE support.
2638 [Satoshi Nakamura and Andy Polyakov]
2640 *) Initialize SSL_METHOD structures at compile time instead of during
2641 runtime, thus removing the need for a lock.
2644 *) Make PKCS7_decrypt() work even if no certificate is supplied by
2645 attempting to decrypt each encrypted key in turn. Add support to
2649 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
2651 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
2654 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
2657 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
2658 key into the same file any more.
2661 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
2664 *) Add -utf8 command line and config file option to 'ca'.
2665 [Stefan <stf@udoma.org]
2667 *) Removed the macro des_crypt(), as it seems to conflict with some
2668 libraries. Use DES_crypt().
2671 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
2672 involves renaming the source and generated shared-libs for
2673 both. The engines will accept the corrected or legacy ids
2674 ('ncipher' and '4758_cca' respectively) when binding. NB,
2675 this only applies when building 'shared'.
2676 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
2678 *) Add attribute functions to EVP_PKEY structure. Modify
2679 PKCS12_create() to recognize a CSP name attribute and
2680 use it. Make -CSP option work again in pkcs12 utility.
2683 *) Add new functionality to the bn blinding code:
2684 - automatic re-creation of the BN_BLINDING parameters after
2685 a fixed number of uses (currently 32)
2686 - add new function for parameter creation
2687 - introduce flags to control the update behaviour of the
2688 BN_BLINDING parameters
2689 - hide BN_BLINDING structure
2690 Add a second BN_BLINDING slot to the RSA structure to improve
2691 performance when a single RSA object is shared among several
2695 *) Add support for DTLS.
2696 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
2698 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
2699 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
2702 *) Remove buggy and incompletet DH cert support from
2703 ssl/ssl_rsa.c and ssl/s3_both.c
2706 *) Use SHA-1 instead of MD5 as the default digest algorithm for
2707 the apps/openssl applications.
2710 *) Compile clean with "-Wall -Wmissing-prototypes
2711 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
2712 DEBUG_SAFESTACK must also be set.
2715 *) Change ./Configure so that certain algorithms can be disabled by default.
2716 The new counterpiece to "no-xxx" is "enable-xxx".
2718 The patented RC5 and MDC2 algorithms will now be disabled unless
2719 "enable-rc5" and "enable-mdc2", respectively, are specified.
2721 (IDEA remains enabled despite being patented. This is because IDEA
2722 is frequently required for interoperability, and there is no license
2723 fee for non-commercial use. As before, "no-idea" can be used to
2724 avoid this algorithm.)
2728 *) Add processing of proxy certificates (see RFC 3820). This work was
2729 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
2730 EGEE (Enabling Grids for E-science in Europe).
2733 *) RC4 performance overhaul on modern architectures/implementations, such
2734 as Intel P4, IA-64 and AMD64.
2737 *) New utility extract-section.pl. This can be used specify an alternative
2738 section number in a pod file instead of having to treat each file as
2739 a separate case in Makefile. This can be done by adding two lines to the
2742 =for comment openssl_section:XXX
2744 The blank line is mandatory.
2748 *) New arguments -certform, -keyform and -pass for s_client and s_server
2749 to allow alternative format key and certificate files and passphrase
2753 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
2754 update associated structures and add various utility functions.
2756 Add new policy related verify parameters, include policy checking in
2757 standard verify code. Enhance 'smime' application with extra parameters
2758 to support policy checking and print out.
2761 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
2762 Nehemiah processors. These extensions support AES encryption in hardware
2763 as well as RNG (though RNG support is currently disabled).
2764 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
2766 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
2769 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
2770 [Andy Polyakov and a number of other people]
2772 *) Improved PowerPC platform support. Most notably BIGNUM assembler
2773 implementation contributed by IBM.
2774 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
2776 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
2777 exponent rather than 'unsigned long'. There is a corresponding change to
2778 the new 'rsa_keygen' element of the RSA_METHOD structure.
2779 [Jelte Jansen, Geoff Thorpe]
2781 *) Functionality for creating the initial serial number file is now
2782 moved from CA.pl to the 'ca' utility with a new option -create_serial.
2784 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
2785 number file to 1, which is bound to cause problems. To avoid
2786 the problems while respecting compatibility between different 0.9.7
2787 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
2788 CA.pl for serial number initialization. With the new release 0.9.8,
2789 we can fix the problem directly in the 'ca' utility.)
2792 *) Reduced header interdepencies by declaring more opaque objects in
2793 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
2794 give fewer recursive includes, which could break lazy source code - so
2795 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
2796 developers should define this symbol when building and using openssl to
2797 ensure they track the recommended behaviour, interfaces, [etc], but
2798 backwards-compatible behaviour prevails when this isn't defined.
2801 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
2804 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
2805 This will generate a random key of the appropriate length based on the
2806 cipher context. The EVP_CIPHER can provide its own random key generation
2807 routine to support keys of a specific form. This is used in the des and
2808 3des routines to generate a key of the correct parity. Update S/MIME
2809 code to use new functions and hence generate correct parity DES keys.
2810 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
2811 valid (weak or incorrect parity).
2814 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
2815 as looking them up. This is useful when the verified structure may contain
2816 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
2817 present unless the new PKCS7_NO_CRL flag is asserted.
2820 *) Extend ASN1 oid configuration module. It now additionally accepts the
2823 shortName = some long name, 1.2.3.4
2826 *) Reimplemented the BN_CTX implementation. There is now no more static
2827 limitation on the number of variables it can handle nor the depth of the
2828 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
2829 information can now expand as required, and rather than having a single
2830 static array of bignums, BN_CTX now uses a linked-list of such arrays
2831 allowing it to expand on demand whilst maintaining the usefulness of
2832 BN_CTX's "bundling".
2835 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
2836 to allow all RSA operations to function using a single BN_CTX.
2839 *) Preliminary support for certificate policy evaluation and checking. This
2840 is initially intended to pass the tests outlined in "Conformance Testing
2841 of Relying Party Client Certificate Path Processing Logic" v1.07.
2844 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
2845 remained unused and not that useful. A variety of other little bignum
2846 tweaks and fixes have also been made continuing on from the audit (see
2850 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
2851 associated ASN1, EVP and SSL functions and old ASN1 macros.
2854 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
2855 and this should never fail. So the return value from the use of
2856 BN_set_word() (which can fail due to needless expansion) is now deprecated;
2857 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
2860 *) BN_CTX_get() should return zero-valued bignums, providing the same
2861 initialised value as BN_new().
2862 [Geoff Thorpe, suggested by Ulf Möller]
2864 *) Support for inhibitAnyPolicy certificate extension.
2867 *) An audit of the BIGNUM code is underway, for which debugging code is
2868 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2869 is considered valid when processing BIGNUMs, and causes execution to
2870 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2871 further steps are taken to deliberately pollute unused data in BIGNUM
2872 structures to try and expose faulty code further on. For now, openssl will
2873 (in its default mode of operation) continue to tolerate the inconsistent
2874 forms that it has tolerated in the past, but authors and packagers should
2875 consider trying openssl and their own applications when compiled with
2876 these debugging symbols defined. It will help highlight potential bugs in
2877 their own code, and will improve the test coverage for OpenSSL itself. At
2878 some point, these tighter rules will become openssl's default to improve
2879 maintainability, though the assert()s and other overheads will remain only
2880 in debugging configurations. See bn.h for more details.
2881 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2883 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2884 that can only be obtained through BN_CTX_new() (which implicitly
2885 initialises it). The presence of this function only made it possible
2886 to overwrite an existing structure (and cause memory leaks).
2889 *) Because of the callback-based approach for implementing LHASH as a
2890 template type, lh_insert() adds opaque objects to hash-tables and
2891 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2892 to clean up those corresponding objects before destroying the hash table
2893 (and losing the object pointers). So some over-zealous constifications in
2894 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2895 objects as "const" and the lh_doall[_arg] callback wrappers are not
2896 prototyped to have "const" restrictions on the object pointers they are
2897 given (and so aren't required to cast them away any more).
2900 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2901 (speed) prefers to use its own implementation. The two implementations
2902 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2903 its object type properly exposed (MS_TM) instead of casting to/from "char
2904 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2905 aren't necessarily the greatest nomenclatures - but this is what was used
2906 internally to the implementation so I've used that for now.
2909 *) Ensure that deprecated functions do not get compiled when
2910 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2911 the self-tests were still using deprecated key-generation functions so
2912 these have been updated also.
2915 *) Reorganise PKCS#7 code to separate the digest location functionality
2916 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2917 New function PKCS7_set_digest() to set the digest type for PKCS#7
2918 digestedData type. Add additional code to correctly generate the
2919 digestedData type and add support for this type in PKCS7 initialization
2923 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2924 structure of type "other".
2927 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2928 sure the loop does correctly stop and breaking ("division by zero")
2929 modulus operations are not performed. The (pre-generated) prime
2930 table crypto/bn/bn_prime.h was already correct, but it could not be
2931 re-generated on some platforms because of the "division by zero"
2932 situation in the script.
2933 [Ralf S. Engelschall]
2935 *) Update support for ECC-based TLS ciphersuites according to
2936 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2937 SHA-1 now is only used for "small" curves (where the
2938 representation of a field element takes up to 24 bytes); for
2939 larger curves, the field element resulting from ECDH is directly
2940 used as premaster secret.
2941 [Douglas Stebila (Sun Microsystems Laboratories)]
2943 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2944 curve secp160r1 to the tests.
2945 [Douglas Stebila (Sun Microsystems Laboratories)]
2947 *) Add the possibility to load symbols globally with DSO.
2948 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
2950 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
2951 control of the error stack.
2954 *) Add support for STORE in ENGINE.
2957 *) Add the STORE type. The intention is to provide a common interface
2958 to certificate and key stores, be they simple file-based stores, or
2959 HSM-type store, or LDAP stores, or...
2960 NOTE: The code is currently UNTESTED and isn't really used anywhere.
2963 *) Add a generic structure called OPENSSL_ITEM. This can be used to
2964 pass a list of arguments to any function as well as provide a way
2965 for a function to pass data back to the caller.
2968 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
2969 works like BUF_strdup() but can be used to duplicate a portion of
2970 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
2974 *) Add the function sk_find_ex() which works like sk_find(), but will
2975 return an index to an element even if an exact match couldn't be
2976 found. The index is guaranteed to point at the element where the
2977 searched-for key would be inserted to preserve sorting order.
2980 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
2981 takes an extra flags argument for optional functionality. Currently,
2982 the following flags are defined:
2984 OBJ_BSEARCH_VALUE_ON_NOMATCH
2985 This one gets OBJ_bsearch_ex() to return a pointer to the first
2986 element where the comparing function returns a negative or zero
2989 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
2990 This one gets OBJ_bsearch_ex() to return a pointer to the first
2991 element where the comparing function returns zero. This is useful
2992 if there are more than one element where the comparing function
2996 *) Make it possible to create self-signed certificates with 'openssl ca'
2997 in such a way that the self-signed certificate becomes part of the
2998 CA database and uses the same mechanisms for serial number generation
2999 as all other certificate signing. The new flag '-selfsign' enables
3000 this functionality. Adapt CA.sh and CA.pl.in.
3003 *) Add functionality to check the public key of a certificate request
3004 against a given private. This is useful to check that a certificate
3005 request can be signed by that key (self-signing).
3008 *) Make it possible to have multiple active certificates with the same
3009 subject in the CA index file. This is done only if the keyword
3010 'unique_subject' is set to 'no' in the main CA section (default
3011 if 'CA_default') of the configuration file. The value is saved
3012 with the database itself in a separate index attribute file,
3013 named like the index file with '.attr' appended to the name.
3016 *) Generate muti valued AVAs using '+' notation in config files for
3020 *) Support for nameConstraints certificate extension.
3023 *) Support for policyConstraints certificate extension.
3026 *) Support for policyMappings certificate extension.
3029 *) Make sure the default DSA_METHOD implementation only uses its
3030 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
3031 and change its own handlers to be NULL so as to remove unnecessary
3032 indirection. This lets alternative implementations fallback to the
3033 default implementation more easily.
3036 *) Support for directoryName in GeneralName related extensions
3040 *) Make it possible to link applications using Makefile.shared.
3041 Make that possible even when linking against static libraries!
3044 *) Support for single pass processing for S/MIME signing. This now
3045 means that S/MIME signing can be done from a pipe, in addition
3046 cleartext signing (multipart/signed type) is effectively streaming
3047 and the signed data does not need to be all held in memory.
3049 This is done with a new flag PKCS7_STREAM. When this flag is set
3050 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
3051 is done after the data is output (and digests calculated) in
3052 SMIME_write_PKCS7().
3055 *) Add full support for -rpath/-R, both in shared libraries and
3056 applications, at least on the platforms where it's known how
3060 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
3061 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
3062 will now compute a table of multiples of the generator that
3063 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
3064 faster (notably in the case of a single point multiplication,
3065 scalar * generator).
3066 [Nils Larsch, Bodo Moeller]
3068 *) IPv6 support for certificate extensions. The various extensions
3069 which use the IP:a.b.c.d can now take IPv6 addresses using the
3070 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
3074 *) Added an ENGINE that implements RSA by performing private key
3075 exponentiations with the GMP library. The conversions to and from
3076 GMP's mpz_t format aren't optimised nor are any montgomery forms
3077 cached, and on x86 it appears OpenSSL's own performance has caught up.
3078 However there are likely to be other architectures where GMP could
3079 provide a boost. This ENGINE is not built in by default, but it can be
3080 specified at Configure time and should be accompanied by the necessary
3081 linker additions, eg;
3082 ./config -DOPENSSL_USE_GMP -lgmp
3085 *) "openssl engine" will not display ENGINE/DSO load failure errors when
3086 testing availability of engines with "-t" - the old behaviour is
3087 produced by increasing the feature's verbosity with "-tt".
3090 *) ECDSA routines: under certain error conditions uninitialized BN objects
3091 could be freed. Solution: make sure initialization is performed early
3092 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
3096 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
3097 and DH_METHOD (eg. by ENGINE implementations) to override the normal
3098 software implementations. For DSA and DH, parameter generation can
3099 also be overriden by providing the appropriate method callbacks.
3102 *) Change the "progress" mechanism used in key-generation and
3103 primality testing to functions that take a new BN_GENCB pointer in
3104 place of callback/argument pairs. The new API functions have "_ex"
3105 postfixes and the older functions are reimplemented as wrappers for
3106 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
3107 declarations of the old functions to help (graceful) attempts to
3108 migrate to the new functions. Also, the new key-generation API
3109 functions operate on a caller-supplied key-structure and return
3110 success/failure rather than returning a key or NULL - this is to
3111 help make "keygen" another member function of RSA_METHOD etc.
3113 Example for using the new callback interface:
3115 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
3119 BN_GENCB_set(&my_cb, my_callback, my_arg);
3121 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
3122 /* For the meaning of a, b in calls to my_callback(), see the
3123 * documentation of the function that calls the callback.
3124 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
3125 * my_callback should return 1 if it wants BN_is_prime_ex()
3126 * to continue, or 0 to stop.
3131 *) Change the ZLIB compression method to be stateful, and make it
3132 available to TLS with the number defined in
3133 draft-ietf-tls-compression-04.txt.
3136 *) Add the ASN.1 structures and functions for CertificatePair, which
3137 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
3139 CertificatePair ::= SEQUENCE {
3140 forward [0] Certificate OPTIONAL,
3141 reverse [1] Certificate OPTIONAL,
3142 -- at least one of the pair shall be present -- }
3144 Also implement the PEM functions to read and write certificate
3145 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
3147 This needed to be defined, mostly for the sake of the LDAP
3148 attribute crossCertificatePair, but may prove useful elsewhere as
3152 *) Make it possible to inhibit symlinking of shared libraries in
3153 Makefile.shared, for Cygwin's sake.
3156 *) Extend the BIGNUM API by creating a function
3157 void BN_set_negative(BIGNUM *a, int neg);
3158 and a macro that behave like
3159 int BN_is_negative(const BIGNUM *a);
3161 to avoid the need to access 'a->neg' directly in applications.
3164 *) Implement fast modular reduction for pseudo-Mersenne primes
3165 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
3166 EC_GROUP_new_curve_GFp() will now automatically use this
3168 [Nils Larsch <nla@trustcenter.de>]
3170 *) Add new lock type (CRYPTO_LOCK_BN).
3173 *) Change the ENGINE framework to automatically load engines
3174 dynamically from specific directories unless they could be
3175 found to already be built in or loaded. Move all the
3176 current engines except for the cryptodev one to a new
3178 The engines in engines/ are built as shared libraries if
3179 the "shared" options was given to ./Configure or ./config.
3180 Otherwise, they are inserted in libcrypto.a.
3181 /usr/local/ssl/engines is the default directory for dynamic
3182 engines, but that can be overriden at configure time through
3183 the usual use of --prefix and/or --openssldir, and at run
3184 time with the environment variable OPENSSL_ENGINES.
3185 [Geoff Thorpe and Richard Levitte]
3187 *) Add Makefile.shared, a helper makefile to build shared
3188 libraries. Addapt Makefile.org.
3191 *) Add version info to Win32 DLLs.
3192 [Peter 'Luna' Runestig" <peter@runestig.com>]
3194 *) Add new 'medium level' PKCS#12 API. Certificates and keys
3195 can be added using this API to created arbitrary PKCS#12
3196 files while avoiding the low level API.
3198 New options to PKCS12_create(), key or cert can be NULL and
3199 will then be omitted from the output file. The encryption
3200 algorithm NIDs can be set to -1 for no encryption, the mac
3201 iteration count can be set to 0 to omit the mac.
3203 Enhance pkcs12 utility by making the -nokeys and -nocerts
3204 options work when creating a PKCS#12 file. New option -nomac
3205 to omit the mac, NONE can be set for an encryption algorithm.
3206 New code is modified to use the enhanced PKCS12_create()
3207 instead of the low level API.
3210 *) Extend ASN1 encoder to support indefinite length constructed
3211 encoding. This can output sequences tags and octet strings in
3212 this form. Modify pk7_asn1.c to support indefinite length
3213 encoding. This is experimental and needs additional code to
3214 be useful, such as an ASN1 bio and some enhanced streaming
3217 Extend template encode functionality so that tagging is passed
3218 down to the template encoder.
3221 *) Let 'openssl req' fail if an argument to '-newkey' is not
3222 recognized instead of using RSA as a default.
3225 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
3226 As these are not official, they are not included in "ALL";
3227 the "ECCdraft" ciphersuite group alias can be used to select them.
3228 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
3230 *) Add ECDH engine support.
3231 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
3233 *) Add ECDH in new directory crypto/ecdh/.
3234 [Douglas Stebila (Sun Microsystems Laboratories)]
3236 *) Let BN_rand_range() abort with an error after 100 iterations
3237 without success (which indicates a broken PRNG).
3240 *) Change BN_mod_sqrt() so that it verifies that the input value
3241 is really the square of the return value. (Previously,
3242 BN_mod_sqrt would show GIGO behaviour.)
3245 *) Add named elliptic curves over binary fields from X9.62, SECG,
3246 and WAP/WTLS; add OIDs that were still missing.
3248 [Sheueling Chang Shantz and Douglas Stebila
3249 (Sun Microsystems Laboratories)]
3251 *) Extend the EC library for elliptic curves over binary fields
3252 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
3255 EC_GF2m_simple_method
3259 EC_GROUP_new_curve_GF2m
3260 EC_GROUP_set_curve_GF2m
3261 EC_GROUP_get_curve_GF2m
3262 EC_POINT_set_affine_coordinates_GF2m
3263 EC_POINT_get_affine_coordinates_GF2m
3264 EC_POINT_set_compressed_coordinates_GF2m
3266 Point compression for binary fields is disabled by default for
3267 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
3270 As binary polynomials are represented as BIGNUMs, various members
3271 of the EC_GROUP and EC_POINT data structures can be shared
3272 between the implementations for prime fields and binary fields;
3273 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
3274 are essentially identical to their ..._GFp counterparts.
3275 (For simplicity, the '..._GFp' prefix has been dropped from
3276 various internal method names.)
3278 An internal 'field_div' method (similar to 'field_mul' and
3279 'field_sqr') has been added; this is used only for binary fields.
3281 [Sheueling Chang Shantz and Douglas Stebila
3282 (Sun Microsystems Laboratories)]
3284 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
3285 through methods ('mul', 'precompute_mult').
3287 The generic implementations (now internally called 'ec_wNAF_mul'
3288 and 'ec_wNAF_precomputed_mult') remain the default if these
3289 methods are undefined.
3291 [Sheueling Chang Shantz and Douglas Stebila
3292 (Sun Microsystems Laboratories)]
3294 *) New function EC_GROUP_get_degree, which is defined through
3295 EC_METHOD. For curves over prime fields, this returns the bit
3296 length of the modulus.
3298 [Sheueling Chang Shantz and Douglas Stebila
3299 (Sun Microsystems Laboratories)]
3301 *) New functions EC_GROUP_dup, EC_POINT_dup.
3302 (These simply call ..._new and ..._copy).
3304 [Sheueling Chang Shantz and Douglas Stebila
3305 (Sun Microsystems Laboratories)]
3307 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
3308 Polynomials are represented as BIGNUMs (where the sign bit is not
3309 used) in the following functions [macros]:
3312 BN_GF2m_sub [= BN_GF2m_add]
3313 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
3314 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
3315 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
3317 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
3318 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
3319 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
3320 BN_GF2m_cmp [= BN_ucmp]
3322 (Note that only the 'mod' functions are actually for fields GF(2^m).
3323 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
3325 For some functions, an the irreducible polynomial defining a
3326 field can be given as an 'unsigned int[]' with strictly
3327 decreasing elements giving the indices of those bits that are set;
3328 i.e., p[] represents the polynomial
3329 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
3331 p[0] > p[1] > ... > p[k] = 0.
3332 This applies to the following functions:
3337 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
3338 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
3340 BN_GF2m_mod_sqrt_arr
3341 BN_GF2m_mod_solve_quad_arr
3345 Conversion can be performed by the following functions:
3350 bntest.c has additional tests for binary polynomial arithmetic.
3352 Two implementations for BN_GF2m_mod_div() are available.
3353 The default algorithm simply uses BN_GF2m_mod_inv() and
3354 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
3355 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
3356 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
3358 [Sheueling Chang Shantz and Douglas Stebila
3359 (Sun Microsystems Laboratories)]
3361 *) Add new error code 'ERR_R_DISABLED' that can be used when some
3362 functionality is disabled at compile-time.
3363 [Douglas Stebila <douglas.stebila@sun.com>]
3365 *) Change default behaviour of 'openssl asn1parse' so that more
3366 information is visible when viewing, e.g., a certificate:
3368 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
3369 mode the content of non-printable OCTET STRINGs is output in a
3370 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
3371 avoid the appearance of a printable string.
3372 [Nils Larsch <nla@trustcenter.de>]
3374 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
3376 EC_GROUP_set_asn1_flag()
3377 EC_GROUP_get_asn1_flag()
3378 EC_GROUP_set_point_conversion_form()
3379 EC_GROUP_get_point_conversion_form()
3380 These control ASN1 encoding details:
3381 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
3382 has been set to OPENSSL_EC_NAMED_CURVE.
3383 - Points are encoded in uncompressed form by default; options for
3384 asn1_for are as for point2oct, namely
3385 POINT_CONVERSION_COMPRESSED
3386 POINT_CONVERSION_UNCOMPRESSED
3387 POINT_CONVERSION_HYBRID
3389 Also add 'seed' and 'seed_len' members to EC_GROUP with access
3392 EC_GROUP_get0_seed()
3393 EC_GROUP_get_seed_len()
3394 This is used only for ASN1 purposes (so far).
3395 [Nils Larsch <nla@trustcenter.de>]
3397 *) Add 'field_type' member to EC_METHOD, which holds the NID
3398 of the appropriate field type OID. The new function
3399 EC_METHOD_get_field_type() returns this value.
3400 [Nils Larsch <nla@trustcenter.de>]
3405 EC_POINT_point2hex()
3406 EC_POINT_hex2point()
3407 providing useful interfaces to EC_POINT_point2oct() and
3408 EC_POINT_oct2point().
3409 [Nils Larsch <nla@trustcenter.de>]
3411 *) Change internals of the EC library so that the functions
3412 EC_GROUP_set_generator()
3413 EC_GROUP_get_generator()
3414 EC_GROUP_get_order()
3415 EC_GROUP_get_cofactor()
3416 are implemented directly in crypto/ec/ec_lib.c and not dispatched
3417 to methods, which would lead to unnecessary code duplication when
3418 adding different types of curves.
3419 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
3421 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
3422 arithmetic, and such that modified wNAFs are generated
3423 (which avoid length expansion in many cases).
3426 *) Add a function EC_GROUP_check_discriminant() (defined via
3427 EC_METHOD) that verifies that the curve discriminant is non-zero.
3429 Add a function EC_GROUP_check() that makes some sanity tests
3430 on a EC_GROUP, its generator and order. This includes
3431 EC_GROUP_check_discriminant().
3432 [Nils Larsch <nla@trustcenter.de>]
3434 *) Add ECDSA in new directory crypto/ecdsa/.
3436 Add applications 'openssl ecparam' and 'openssl ecdsa'
3437 (these are based on 'openssl dsaparam' and 'openssl dsa').
3439 ECDSA support is also included in various other files across the
3440 library. Most notably,
3441 - 'openssl req' now has a '-newkey ecdsa:file' option;
3442 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
3443 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
3444 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
3445 them suitable for ECDSA where domain parameters must be
3446 extracted before the specific public key;
3447 - ECDSA engine support has been added.
3448 [Nils Larsch <nla@trustcenter.de>]
3450 *) Include some named elliptic curves, and add OIDs from X9.62,
3451 SECG, and WAP/WTLS. Each curve can be obtained from the new
3453 EC_GROUP_new_by_curve_name(),
3454 and the list of available named curves can be obtained with
3455 EC_get_builtin_curves().
3456 Also add a 'curve_name' member to EC_GROUP objects, which can be
3458 EC_GROUP_set_curve_name()
3459 EC_GROUP_get_curve_name()
3460 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
3462 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
3463 was actually never needed) and in BN_mul(). The removal in BN_mul()
3464 required a small change in bn_mul_part_recursive() and the addition
3465 of the functions bn_cmp_part_words(), bn_sub_part_words() and
3466 bn_add_part_words(), which do the same thing as bn_cmp_words(),
3467 bn_sub_words() and bn_add_words() except they take arrays with
3471 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
3473 *) Cleanse PEM buffers before freeing them since they may contain
3475 [Benjamin Bennett <ben@psc.edu>]
3477 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3478 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3479 authentication-only ciphersuites.
3482 *) Since AES128 and AES256 share a single mask bit in the logic of
3483 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3484 kludge to work properly if AES128 is available and AES256 isn't.
3487 *) Expand security boundary to match 1.1.1 module.
3490 *) Remove redundant features: hash file source, editing of test vectors
3491 modify fipsld to use external fips_premain.c signature.
3494 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
3495 run algorithm test programs.
3498 *) Make algorithm test programs more tolerant of whitespace.
3501 *) Have SSL/TLS server implementation tolerate "mismatched" record
3502 protocol version while receiving ClientHello even if the
3503 ClientHello is fragmented. (The server can't insist on the
3504 particular protocol version it has chosen before the ServerHello
3505 message has informed the client about his choice.)
3508 *) Load error codes if they are not already present instead of using a
3509 static variable. This allows them to be cleanly unloaded and reloaded.
3512 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
3514 *) Introduce limits to prevent malicious keys being able to
3515 cause a denial of service. (CVE-2006-2940)
3516 [Steve Henson, Bodo Moeller]
3518 *) Fix ASN.1 parsing of certain invalid structures that can result
3519 in a denial of service. (CVE-2006-2937) [Steve Henson]
3521 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3522 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3524 *) Fix SSL client code which could crash if connecting to a
3525 malicious SSLv2 server. (CVE-2006-4343)
3526 [Tavis Ormandy and Will Drewry, Google Security Team]
3528 *) Change ciphersuite string processing so that an explicit
3529 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
3530 will no longer include "AES128-SHA"), and any other similar
3531 ciphersuite (same bitmap) from *other* protocol versions (so that
3532 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
3533 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
3534 changes from 0.9.8b and 0.9.8d.
3537 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
3539 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3540 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3542 *) Change the Unix randomness entropy gathering to use poll() when
3543 possible instead of select(), since the latter has some
3544 undesirable limitations.
3545 [Darryl Miles via Richard Levitte and Bodo Moeller]
3547 *) Disable rogue ciphersuites:
3549 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3550 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3551 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3553 The latter two were purportedly from
3554 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3557 Also deactive the remaining ciphersuites from
3558 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3559 unofficial, and the ID has long expired.
3562 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3563 dual-core machines) and other potential thread-safety issues.
3566 Changes between 0.9.7i and 0.9.7j [04 May 2006]
3568 *) Adapt fipsld and the build system to link against the validated FIPS
3569 module in FIPS mode.
3572 *) Fixes for VC++ 2005 build under Windows.
3575 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
3576 from a Windows bash shell such as MSYS. It is autodetected from the
3577 "config" script when run from a VC++ environment. Modify standard VC++
3578 build to use fipscanister.o from the GNU make build.
3581 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
3583 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
3584 The value now differs depending on if you build for FIPS or not.
3585 BEWARE! A program linked with a shared FIPSed libcrypto can't be
3586 safely run with a non-FIPSed libcrypto, as it may crash because of
3587 the difference induced by this change.
3590 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
3592 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3593 (part of SSL_OP_ALL). This option used to disable the
3594 countermeasure against man-in-the-middle protocol-version
3595 rollback in the SSL 2.0 server implementation, which is a bad
3596 idea. (CVE-2005-2969)
3598 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3599 for Information Security, National Institute of Advanced Industrial
3600 Science and Technology [AIST], Japan)]
3602 *) Minimal support for X9.31 signatures and PSS padding modes. This is
3603 mainly for FIPS compliance and not fully integrated at this stage.
3606 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
3607 the exponentiation using a fixed-length exponent. (Otherwise,
3608 the information leaked through timing could expose the secret key
3609 after many signatures; cf. Bleichenbacher's attack on DSA with
3613 *) Make a new fixed-window mod_exp implementation the default for
3614 RSA, DSA, and DH private-key operations so that the sequence of
3615 squares and multiplies and the memory access pattern are
3616 independent of the particular secret key. This will mitigate
3617 cache-timing and potential related attacks.
3619 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
3620 and this is automatically used by BN_mod_exp_mont() if the new flag
3621 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
3622 will use this BN flag for private exponents unless the flag
3623 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
3624 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
3626 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
3628 *) Change the client implementation for SSLv23_method() and
3629 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
3630 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
3631 (Previously, the SSL 2.0 backwards compatible Client Hello
3632 message format would be used even with SSL_OP_NO_SSLv2.)
3635 *) Add support for smime-type MIME parameter in S/MIME messages which some
3639 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
3640 a threadsafe manner. Modify rsa code to use new function and add calls
3641 to dsa and dh code (which had race conditions before).
3644 *) Include the fixed error library code in the C error file definitions
3645 instead of fixing them up at runtime. This keeps the error code
3646 structures constant.
3649 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
3651 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
3654 *) Fixes for newer kerberos headers. NB: the casts are needed because
3655 the 'length' field is signed on one version and unsigned on another
3656 with no (?) obvious way to tell the difference, without these VC++
3657 complains. Also the "definition" of FAR (blank) is no longer included
3658 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
3659 some needed definitions.
3662 *) Undo Cygwin change.
3665 *) Added support for proxy certificates according to RFC 3820.
3666 Because they may be a security thread to unaware applications,
3667 they must be explicitely allowed in run-time. See
3668 docs/HOWTO/proxy_certificates.txt for further information.
3671 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
3673 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
3674 server and client random values. Previously
3675 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
3676 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
3678 This change has negligible security impact because:
3680 1. Server and client random values still have 24 bytes of pseudo random
3683 2. Server and client random values are sent in the clear in the initial
3686 3. The master secret is derived using the premaster secret (48 bytes in
3687 size for static RSA ciphersuites) as well as client server and random
3690 The OpenSSL team would like to thank the UK NISCC for bringing this issue
3693 [Stephen Henson, reported by UK NISCC]
3695 *) Use Windows randomness collection on Cygwin.
3698 *) Fix hang in EGD/PRNGD query when communication socket is closed
3699 prematurely by EGD/PRNGD.
3700 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
3702 *) Prompt for pass phrases when appropriate for PKCS12 input format.
3705 *) Back-port of selected performance improvements from development
3706 branch, as well as improved support for PowerPC platforms.
3709 *) Add lots of checks for memory allocation failure, error codes to indicate
3710 failure and freeing up memory if a failure occurs.
3711 [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
3713 *) Add new -passin argument to dgst.
3716 *) Perform some character comparisons of different types in X509_NAME_cmp:
3717 this is needed for some certificates that reencode DNs into UTF8Strings
3718 (in violation of RFC3280) and can't or wont issue name rollover
3722 *) Make an explicit check during certificate validation to see that
3723 the CA setting in each certificate on the chain is correct. As a
3724 side effect always do the following basic checks on extensions,
3725 not just when there's an associated purpose to the check:
3727 - if there is an unhandled critical extension (unless the user
3728 has chosen to ignore this fault)
3729 - if the path length has been exceeded (if one is set at all)
3730 - that certain extensions fit the associated purpose (if one has
3734 Changes between 0.9.7d and 0.9.7e [25 Oct 2004]
3736 *) Avoid a race condition when CRLs are checked in a multi threaded
3737 environment. This would happen due to the reordering of the revoked
3738 entries during signature checking and serial number lookup. Now the
3739 encoding is cached and the serial number sort performed under a lock.
3740 Add new STACK function sk_is_sorted().
3743 *) Add Delta CRL to the extension code.
3746 *) Various fixes to s3_pkt.c so alerts are sent properly.
3747 [David Holmes <d.holmes@f5.com>]
3749 *) Reduce the chances of duplicate issuer name and serial numbers (in
3750 violation of RFC3280) using the OpenSSL certificate creation utilities.
3751 This is done by creating a random 64 bit value for the initial serial
3752 number when a serial number file is created or when a self signed
3753 certificate is created using 'openssl req -x509'. The initial serial
3754 number file is created using 'openssl x509 -next_serial' in CA.pl
3755 rather than being initialized to 1.
3758 Changes between 0.9.7c and 0.9.7d [17 Mar 2004]
3760 *) Fix null-pointer assignment in do_change_cipher_spec() revealed
3761 by using the Codenomicon TLS Test Tool (CVE-2004-0079)
3762 [Joe Orton, Steve Henson]
3764 *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
3766 [Joe Orton, Steve Henson]
3768 *) Make it possible to have multiple active certificates with the same
3769 subject in the CA index file. This is done only if the keyword
3770 'unique_subject' is set to 'no' in the main CA section (default
3771 if 'CA_default') of the configuration file. The value is saved
3772 with the database itself in a separate index attribute file,
3773 named like the index file with '.attr' appended to the name.
3776 *) X509 verify fixes. Disable broken certificate workarounds when
3777 X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
3778 keyUsage extension present. Don't accept CRLs with unhandled critical
3779 extensions: since verify currently doesn't process CRL extensions this
3780 rejects a CRL with *any* critical extensions. Add new verify error codes
3784 *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
3785 A clarification of RFC2560 will require the use of OCTET STRINGs and
3786 some implementations cannot handle the current raw format. Since OpenSSL
3787 copies and compares OCSP nonces as opaque blobs without any attempt at
3788 parsing them this should not create any compatibility issues.
3791 *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
3792 calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
3793 this HMAC (and other) operations are several times slower than OpenSSL
3797 *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
3798 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3800 *) Use the correct content when signing type "other".
3803 Changes between 0.9.7b and 0.9.7c [30 Sep 2003]
3805 *) Fix various bugs revealed by running the NISCC test suite:
3807 Stop out of bounds reads in the ASN1 code when presented with
3808 invalid tags (CVE-2003-0543 and CVE-2003-0544).
3810 Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
3812 If verify callback ignores invalid public key errors don't try to check
3813 certificate signature with the NULL public key.
3817 *) New -ignore_err option in ocsp application to stop the server
3818 exiting on the first error in a request.
3821 *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
3822 if the server requested one: as stated in TLS 1.0 and SSL 3.0
3826 *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
3827 extra data after the compression methods not only for TLS 1.0
3828 but also for SSL 3.0 (as required by the specification).
3829 [Bodo Moeller; problem pointed out by Matthias Loepfe]
3831 *) Change X509_certificate_type() to mark the key as exported/exportable
3832 when it's 512 *bits* long, not 512 bytes.
3835 *) Change AES_cbc_encrypt() so it outputs exact multiple of
3836 blocks during encryption.
3839 *) Various fixes to base64 BIO and non blocking I/O. On write
3840 flushes were not handled properly if the BIO retried. On read
3841 data was not being buffered properly and had various logic bugs.
3842 This also affects blocking I/O when the data being decoded is a
3846 *) Various S/MIME bugfixes and compatibility changes:
3847 output correct application/pkcs7 MIME type if
3848 PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
3849 Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
3850 of files as .eml work). Correctly handle very long lines in MIME
3854 Changes between 0.9.7a and 0.9.7b [10 Apr 2003]
3856 *) Countermeasure against the Klima-Pokorny-Rosa extension of
3857 Bleichbacher's attack on PKCS #1 v1.5 padding: treat
3858 a protocol version number mismatch like a decryption error
3859 in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
3862 *) Turn on RSA blinding by default in the default implementation
3863 to avoid a timing attack. Applications that don't want it can call
3864 RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
3865 They would be ill-advised to do so in most cases.
3866 [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
3868 *) Change RSA blinding code so that it works when the PRNG is not
3869 seeded (in this case, the secret RSA exponent is abused as
3870 an unpredictable seed -- if it is not unpredictable, there
3871 is no point in blinding anyway). Make RSA blinding thread-safe
3872 by remembering the creator's thread ID in rsa->blinding and
3873 having all other threads use local one-time blinding factors
3874 (this requires more computation than sharing rsa->blinding, but
3875 avoids excessive locking; and if an RSA object is not shared
3876 between threads, blinding will still be very fast).
3879 *) Fixed a typo bug that would cause ENGINE_set_default() to set an
3880 ENGINE as defaults for all supported algorithms irrespective of
3881 the 'flags' parameter. 'flags' is now honoured, so applications
3882 should make sure they are passing it correctly.
3885 *) Target "mingw" now allows native Windows code to be generated in
3886 the Cygwin environment as well as with the MinGW compiler.
3889 Changes between 0.9.7 and 0.9.7a [19 Feb 2003]
3891 *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
3892 via timing by performing a MAC computation even if incorrrect
3893 block cipher padding has been found. This is a countermeasure
3894 against active attacks where the attacker has to distinguish
3895 between bad padding and a MAC verification error. (CVE-2003-0078)
3897 [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
3898 Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
3899 Martin Vuagnoux (EPFL, Ilion)]
3901 *) Make the no-err option work as intended. The intention with no-err
3902 is not to have the whole error stack handling routines removed from
3903 libcrypto, it's only intended to remove all the function name and
3904 reason texts, thereby removing some of the footprint that may not
3905 be interesting if those errors aren't displayed anyway.
3907 NOTE: it's still possible for any application or module to have it's
3908 own set of error texts inserted. The routines are there, just not
3909 used by default when no-err is given.
3912 *) Add support for FreeBSD on IA64.
3913 [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
3915 *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
3916 Kerberos function mit_des_cbc_cksum(). Before this change,
3917 the value returned by DES_cbc_cksum() was like the one from
3918 mit_des_cbc_cksum(), except the bytes were swapped.
3919 [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
3921 *) Allow an application to disable the automatic SSL chain building.
3922 Before this a rather primitive chain build was always performed in
3923 ssl3_output_cert_chain(): an application had no way to send the
3924 correct chain if the automatic operation produced an incorrect result.
3926 Now the chain builder is disabled if either:
3928 1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
3930 2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
3932 The reasoning behind this is that an application would not want the
3933 auto chain building to take place if extra chain certificates are
3934 present and it might also want a means of sending no additional
3935 certificates (for example the chain has two certificates and the
3939 *) Add the possibility to build without the ENGINE framework.
3940 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3942 *) Under Win32 gmtime() can return NULL: check return value in
3943 OPENSSL_gmtime(). Add error code for case where gmtime() fails.
3946 *) DSA routines: under certain error conditions uninitialized BN objects
3947 could be freed. Solution: make sure initialization is performed early
3948 enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
3949 Nils Larsch <nla@trustcenter.de> via PR#459)
3952 *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
3953 checked on reconnect on the client side, therefore session resumption
3954 could still fail with a "ssl session id is different" error. This
3955 behaviour is masked when SSL_OP_ALL is used due to
3956 SSL_OP_MICROSOFT_SESS_ID_BUG being set.
3957 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3958 followup to PR #377.
3961 *) IA-32 assembler support enhancements: unified ELF targets, support
3962 for SCO/Caldera platforms, fix for Cygwin shared build.
3965 *) Add support for FreeBSD on sparc64. As a consequence, support for
3966 FreeBSD on non-x86 processors is separate from x86 processors on
3967 the config script, much like the NetBSD support.
3968 [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
3970 Changes between 0.9.6h and 0.9.7 [31 Dec 2002]
3972 [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
3975 *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
3976 code (06) was taken as the first octet of the session ID and the last
3977 octet was ignored consequently. As a result SSLv2 client side session
3978 caching could not have worked due to the session ID mismatch between
3980 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3984 *) Change the declaration of needed Kerberos libraries to use EX_LIBS
3985 instead of the special (and badly supported) LIBKRB5. LIBKRB5 is
3989 *) The hw_ncipher.c engine requires dynamic locks. Unfortunately, it
3990 seems that in spite of existing for more than a year, many application
3991 author have done nothing to provide the necessary callbacks, which
3992 means that this particular engine will not work properly anywhere.
3993 This is a very unfortunate situation which forces us, in the name
3994 of usability, to give the hw_ncipher.c a static lock, which is part
3996 NOTE: This is for the 0.9.7 series ONLY. This hack will never
3997 appear in 0.9.8 or later. We EXPECT application authors to have
3998 dealt properly with this when 0.9.8 is released (unless we actually
3999 make such changes in the libcrypto locking code that changes will
4000 have to be made anyway).
4003 *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
4004 octets have been read, EOF or an error occurs. Without this change
4005 some truncated ASN1 structures will not produce an error.
4008 *) Disable Heimdal support, since it hasn't been fully implemented.
4009 Still give the possibility to force the use of Heimdal, but with
4010 warnings and a request that patches get sent to openssl-dev.
4013 *) Add the VC-CE target, introduce the WINCE sysname, and add
4014 INSTALL.WCE and appropriate conditionals to make it build.
4015 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
4017 *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
4018 cygssl-x.y.z.dll, where x, y and z are the major, minor and
4019 edit numbers of the version.
4020 [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
4022 *) Introduce safe string copy and catenation functions
4023 (BUF_strlcpy() and BUF_strlcat()).
4024 [Ben Laurie (CHATS) and Richard Levitte]
4026 *) Avoid using fixed-size buffers for one-line DNs.
4027 [Ben Laurie (CHATS)]
4029 *) Add BUF_MEM_grow_clean() to avoid information leakage when
4030 resizing buffers containing secrets, and use where appropriate.
4031 [Ben Laurie (CHATS)]
4033 *) Avoid using fixed size buffers for configuration file location.
4034 [Ben Laurie (CHATS)]
4036 *) Avoid filename truncation for various CA files.
4037 [Ben Laurie (CHATS)]
4039 *) Use sizeof in preference to magic numbers.
4040 [Ben Laurie (CHATS)]
4042 *) Avoid filename truncation in cert requests.
4043 [Ben Laurie (CHATS)]
4045 *) Add assertions to check for (supposedly impossible) buffer
4047 [Ben Laurie (CHATS)]
4049 *) Don't cache truncated DNS entries in the local cache (this could
4050 potentially lead to a spoofing attack).
4051 [Ben Laurie (CHATS)]
4053 *) Fix various buffers to be large enough for hex/decimal
4054 representations in a platform independent manner.
4055 [Ben Laurie (CHATS)]
4057 *) Add CRYPTO_realloc_clean() to avoid information leakage when
4058 resizing buffers containing secrets, and use where appropriate.
4059 [Ben Laurie (CHATS)]
4061 *) Add BIO_indent() to avoid much slightly worrying code to do
4063 [Ben Laurie (CHATS)]
4065 *) Convert sprintf()/BIO_puts() to BIO_printf().
4066 [Ben Laurie (CHATS)]
4068 *) buffer_gets() could terminate with the buffer only half
4070 [Ben Laurie (CHATS)]
4072 *) Add assertions to prevent user-supplied crypto functions from
4073 overflowing internal buffers by having large block sizes, etc.
4074 [Ben Laurie (CHATS)]
4076 *) New OPENSSL_assert() macro (similar to assert(), but enabled
4078 [Ben Laurie (CHATS)]
4080 *) Eliminate unused copy of key in RC4.
4081 [Ben Laurie (CHATS)]
4083 *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
4084 [Ben Laurie (CHATS)]
4086 *) Fix off-by-one error in EGD path.
4087 [Ben Laurie (CHATS)]
4089 *) If RANDFILE path is too long, ignore instead of truncating.
4090 [Ben Laurie (CHATS)]
4092 *) Eliminate unused and incorrectly sized X.509 structure
4094 [Ben Laurie (CHATS)]
4096 *) Eliminate unused and dangerous function knumber().
4097 [Ben Laurie (CHATS)]
4099 *) Eliminate unused and dangerous structure, KSSL_ERR.
4100 [Ben Laurie (CHATS)]
4102 *) Protect against overlong session ID context length in an encoded
4103 session object. Since these are local, this does not appear to be
4105 [Ben Laurie (CHATS)]
4107 *) Change from security patch (see 0.9.6e below) that did not affect
4108 the 0.9.6 release series:
4110 Remote buffer overflow in SSL3 protocol - an attacker could
4111 supply an oversized master key in Kerberos-enabled versions.
4113 [Ben Laurie (CHATS)]
4115 *) Change the SSL kerb5 codes to match RFC 2712.
4118 *) Make -nameopt work fully for req and add -reqopt switch.
4119 [Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]
4121 *) The "block size" for block ciphers in CFB and OFB mode should be 1.
4122 [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]
4124 *) Make sure tests can be performed even if the corresponding algorithms
4125 have been removed entirely. This was also the last step to make
4126 OpenSSL compilable with DJGPP under all reasonable conditions.
4127 [Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
4129 *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
4130 to allow version independent disabling of normally unselected ciphers,
4131 which may be activated as a side-effect of selecting a single cipher.
4133 (E.g., cipher list string "RSA" enables ciphersuites that are left
4134 out of "ALL" because they do not provide symmetric encryption.
4135 "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
4136 [Lutz Jaenicke, Bodo Moeller]
4138 *) Add appropriate support for separate platform-dependent build
4139 directories. The recommended way to make a platform-dependent
4140 build directory is the following (tested on Linux), maybe with
4143 # Place yourself outside of the OpenSSL source tree. In
4144 # this example, the environment variable OPENSSL_SOURCE
4145 # is assumed to contain the absolute OpenSSL source directory.
4146 mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
4147 cd objtree/"`uname -s`-`uname -r`-`uname -m`"
4148 (cd $OPENSSL_SOURCE; find . -type f) | while read F; do
4149 mkdir -p `dirname $F`
4150 ln -s $OPENSSL_SOURCE/$F $F
4153 To be absolutely sure not to disturb the source tree, a "make clean"
4154 is a good thing. If it isn't successfull, don't worry about it,
4155 it probably means the source directory is very clean.
4158 *) Make sure any ENGINE control commands make local copies of string
4159 pointers passed to them whenever necessary. Otherwise it is possible
4160 the caller may have overwritten (or deallocated) the original string
4161 data when a later ENGINE operation tries to use the stored values.
4162 [Götz Babin-Ebell <babinebell@trustcenter.de>]
4164 *) Improve diagnostics in file reading and command-line digests.
4165 [Ben Laurie aided and abetted by Solar Designer <solar@openwall.com>]
4167 *) Add AES modes CFB and OFB to the object database. Correct an
4168 error in AES-CFB decryption.
4171 *) Remove most calls to EVP_CIPHER_CTX_cleanup() in evp_enc.c, this
4172 allows existing EVP_CIPHER_CTX structures to be reused after
4173 calling EVP_*Final(). This behaviour is used by encryption
4174 BIOs and some applications. This has the side effect that
4175 applications must explicitly clean up cipher contexts with
4176 EVP_CIPHER_CTX_cleanup() or they will leak memory.
4179 *) Check the values of dna and dnb in bn_mul_recursive before calling
4180 bn_mul_comba (a non zero value means the a or b arrays do not contain
4181 n2 elements) and fallback to bn_mul_normal if either is not zero.
4184 *) Fix escaping of non-ASCII characters when using the -subj option
4185 of the "openssl req" command line tool. (Robert Joop <joop@fokus.gmd.de>)
4188 *) Make object definitions compliant to LDAP (RFC2256): SN is the short
4189 form for "surname", serialNumber has no short form.
4190 Use "mail" as the short name for "rfc822Mailbox" according to RFC2798;
4191 therefore remove "mail" short name for "internet 7".
4192 The OID for unique identifiers in X509 certificates is
4193 x500UniqueIdentifier, not uniqueIdentifier.
4194 Some more OID additions. (Michael Bell <michael.bell@rz.hu-berlin.de>)
4197 *) Add an "init" command to the ENGINE config module and auto initialize
4198 ENGINEs. Without any "init" command the ENGINE will be initialized
4199 after all ctrl commands have been executed on it. If init=1 the
4200 ENGINE is initailized at that point (ctrls before that point are run
4201 on the uninitialized ENGINE and after on the initialized one). If
4202 init=0 then the ENGINE will not be iniatialized at all.
4205 *) Fix the 'app_verify_callback' interface so that the user-defined
4206 argument is actually passed to the callback: In the
4207 SSL_CTX_set_cert_verify_callback() prototype, the callback
4208 declaration has been changed from
4211 int (*cb)(X509_STORE_CTX *,void *);
4212 in ssl_verify_cert_chain (ssl/ssl_cert.c), the call
4213 i=s->ctx->app_verify_callback(&ctx)
4214 has been changed into
4215 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg).
4217 To update applications using SSL_CTX_set_cert_verify_callback(),
4218 a dummy argument can be added to their callback functions.
4219 [D. K. Smetters <smetters@parc.xerox.com>]
4221 *) Added the '4758cca' ENGINE to support IBM 4758 cards.
4222 [Maurice Gittens <maurice@gittens.nl>, touchups by Geoff Thorpe]
4224 *) Add and OPENSSL_LOAD_CONF define which will cause
4225 OpenSSL_add_all_algorithms() to load the openssl.cnf config file.
4226 This allows older applications to transparently support certain
4227 OpenSSL features: such as crypto acceleration and dynamic ENGINE loading.
4228 Two new functions OPENSSL_add_all_algorithms_noconf() which will never
4229 load the config file and OPENSSL_add_all_algorithms_conf() which will
4230 always load it have also been added.
4233 *) Add the OFB, CFB and CTR (all with 128 bit feedback) to AES.
4234 Adjust NIDs and EVP layer.
4235 [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]
4237 *) Config modules support in openssl utility.
4239 Most commands now load modules from the config file,
4240 though in a few (such as version) this isn't done
4241 because it couldn't be used for anything.
4243 In the case of ca and req the config file used is
4244 the same as the utility itself: that is the -config
4245 command line option can be used to specify an
4249 *) Move default behaviour from OPENSSL_config(). If appname is NULL
4250 use "openssl_conf" if filename is NULL use default openssl config file.
4253 *) Add an argument to OPENSSL_config() to allow the use of an alternative
4254 config section name. Add a new flag to tolerate a missing config file
4255 and move code to CONF_modules_load_file().
4258 *) Support for crypto accelerator cards from Accelerated Encryption
4259 Processing, www.aep.ie. (Use engine 'aep')
4260 The support was copied from 0.9.6c [engine] and adapted/corrected
4261 to work with the new engine framework.
4262 [AEP Inc. and Richard Levitte]
4264 *) Support for SureWare crypto accelerator cards from Baltimore
4265 Technologies. (Use engine 'sureware')
4266 The support was copied from 0.9.6c [engine] and adapted
4267 to work with the new engine framework.
4270 *) Have the CHIL engine fork-safe (as defined by nCipher) and actually
4271 make the newer ENGINE framework commands for the CHIL engine work.
4272 [Toomas Kiisk <vix@cyber.ee> and Richard Levitte]
projects / openssl.git / blob