5 Changes between 1.0.1 and 1.1.0 [xx XXX xxxx]
7 *) Initial SSL tracing code. This parses out SSL/TLS records using the
8 message callback and prints the results. Needs compile time option
9 "enable-ssl-trace". New options to s_client and s_server to enable
13 *) New functions to retrieve certificate signature and signature
17 *) Print out deprecated issuer and subject unique ID fields in
22 [Emilia Kasper, Adam Langley, Ben Laurie (Google)]
24 *) Support for automatic EC temporary key parameter selection. If enabled
25 the most preferred EC parameters are automatically used instead of
26 hardcoded fixed parameters. Now a server just has to call:
27 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
28 support ECDH and use the most appropriate parameters.
31 *) Enhance and tidy EC curve and point format TLS extension code. Use
32 static structures instead of allocation if default values are used.
33 New ctrls to set curves we wish to support and to retrieve shared curves.
34 Print out shared curves in s_server. New options to s_server and s_client
35 to set list of supported curves.
38 *) New ctrls to retrieve supported signature algorithms and
39 supported curve values as an array of NIDs. Extend openssl utility
40 to print out received values.
43 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
44 between NIDs and the more common NIST names such as "P-256". Enhance
45 ecparam utility and ECC method to recognise the NIST names for curves.
48 *) Enhance SSL/TLS certificate chain handling to support different
49 chains for each certificate instead of one chain in the parent SSL_CTX.
52 *) Support for fixed DH ciphersuite client authentication: where both
53 server and client use DH certificates with common parameters.
56 *) Support for fixed DH ciphersuites: those requiring DH server
60 *) Transparently support X9.42 DH parameters when calling
61 PEM_read_bio_DHparameters. This means existing applications can handle
62 the new parameter format automatically.
65 *) Initial experimental support for X9.42 DH parameter format: mainly
66 to support use of 'q' parameter for RFC5114 parameters.
69 *) Add DH parameters from RFC5114 including test data to dhtest.
72 *) Update fips_test_suite to support multiple command line options. New
73 test to induce all self test errors in sequence and check expected
77 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
78 sign or verify all in one operation.
81 *) Add fips_algvs: a multicall fips utility incorporaing all the algorithm
82 test programs and fips_test_suite. Includes functionality to parse
83 the minimal script output of fipsalgest.pl directly.
86 *) Add authorisation parameter to FIPS_module_mode_set().
89 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
92 *) Use separate DRBG fields for internal and external flags. New function
93 FIPS_drbg_health_check() to perform on demand health checking. Add
94 generation tests to fips_test_suite with reduced health check interval to
95 demonstrate periodic health checking. Add "nodh" option to
96 fips_test_suite to skip very slow DH test.
99 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
103 *) More extensive health check for DRBG checking many more failure modes.
104 New function FIPS_selftest_drbg_all() to handle every possible DRBG
105 combination: call this in fips_test_suite.
108 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
109 and POST to handle Dual EC cases.
112 *) Add support for canonical generation of DSA parameter 'g'. See
115 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
116 POST to handle HMAC cases.
119 *) Add functions FIPS_module_version() and FIPS_module_version_text()
120 to return numberical and string versions of the FIPS module number.
123 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
124 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implmeneted
125 outside the validated module in the FIPS capable OpenSSL.
128 *) Minor change to DRBG entropy callback semantics. In some cases
129 there is no mutiple of the block length between min_len and
130 max_len. Allow the callback to return more than max_len bytes
131 of entropy but discard any extra: it is the callback's responsibility
132 to ensure that the extra data discarded does not impact the
133 requested amount of entropy.
136 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
137 information in FIPS186-3, SP800-57 and SP800-131A.
140 *) CCM support via EVP. Interface is very similar to GCM case except we
141 must supply all data in one chunk (i.e. no update, final) and the
142 message length must be supplied if AAD is used. Add algorithm test
146 *) Initial version of POST overhaul. Add POST callback to allow the status
147 of POST to be monitored and/or failures induced. Modify fips_test_suite
148 to use callback. Always run all selftests even if one fails.
151 *) XTS support including algorithm test driver in the fips_gcmtest program.
152 Note: this does increase the maximum key length from 32 to 64 bytes but
153 there should be no binary compatibility issues as existing applications
154 will never use XTS mode.
157 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
158 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
159 performs algorithm blocking for unapproved PRNG types. Also do not
160 set PRNG type in FIPS_mode_set(): leave this to the application.
161 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
162 the standard OpenSSL PRNG: set additional data to a date time vector.
165 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
166 This shouldn't present any incompatibility problems because applications
167 shouldn't be using these directly and any that are will need to rethink
168 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
171 *) Extensive self tests and health checking required by SP800-90 DRBG.
172 Remove strength parameter from FIPS_drbg_instantiate and always
173 instantiate at maximum supported strength.
176 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
179 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
182 *) New function DH_compute_key_padded() to compute a DH key and pad with
183 leading zeroes if needed: this complies with SP800-56A et al.
186 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
187 anything, incomplete, subject to change and largely untested at present.
190 *) Modify fipscanisteronly build option to only build the necessary object
191 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
194 *) Add experimental option FIPSSYMS to give all symbols in
195 fipscanister.o and FIPS or fips prefix. This will avoid
196 conflicts with future versions of OpenSSL. Add perl script
197 util/fipsas.pl to preprocess assembly language source files
198 and rename any affected symbols.
201 *) Add selftest checks and algorithm block of non-fips algorithms in
202 FIPS mode. Remove DES2 from selftests.
205 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
206 return internal method without any ENGINE dependencies. Add new
207 tiny fips sign and verify functions.
210 *) New build option no-ec2m to disable characteristic 2 code.
213 *) New build option "fipscanisteronly". This only builds fipscanister.o
214 and (currently) associated fips utilities. Uses the file Makefile.fips
215 instead of Makefile.org as the prototype.
218 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
219 Update fips_gcmtest to use IV generator.
222 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
223 setting output buffer to NULL. The *Final function must be
224 called although it will not retrieve any additional data. The tag
225 can be set or retrieved with a ctrl. The IV length is by default 12
226 bytes (96 bits) but can be set to an alternative value. If the IV
227 length exceeds the maximum IV length (currently 16 bytes) it cannot be
231 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
232 underlying do_cipher function handles all cipher semantics itself
233 including padding and finalisation. This is useful if (for example)
234 an ENGINE cipher handles block padding itself. The behaviour of
235 do_cipher is subtly changed if this flag is set: the return value
236 is the number of characters written to the output buffer (zero is
237 no longer an error code) or a negative error code. Also if the
238 input buffer is NULL and length 0 finalisation should be performed.
241 *) If a candidate issuer certificate is already part of the constructed
242 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
245 *) Improve forward-security support: add functions
247 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
248 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
250 for use by SSL/TLS servers; the callback function will be called whenever a
251 new session is created, and gets to decide whether the session may be
252 cached to make it resumable (return 0) or not (return 1). (As by the
253 SSL/TLS protocol specifications, the session_id sent by the server will be
254 empty to indicate that the session is not resumable; also, the server will
255 not generate RFC 4507 (RFC 5077) session tickets.)
257 A simple reasonable callback implementation is to return is_forward_secure.
258 This parameter will be set to 1 or 0 depending on the ciphersuite selected
259 by the SSL/TLS server library, indicating whether it can provide forward
261 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
263 *) New function OPENSSL_gmtime_diff to find the difference in days
264 and seconds between two tm structures. This will be used to provide
265 additional functionality for ASN1_TIME.
268 *) Add -trusted_first option which attempts to find certificates in the
269 trusted store even if an untrusted chain is also supplied.
272 *) Initial experimental support for explicitly trusted non-root CAs.
273 OpenSSL still tries to build a complete chain to a root but if an
274 intermediate CA has a trust setting included that is used. The first
275 setting is used: whether to trust or reject.
278 *) New -verify_name option in command line utilities to set verification
282 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
283 Add CMAC pkey methods.
286 *) Experimental regnegotiation in s_server -www mode. If the client
287 browses /reneg connection is renegotiated. If /renegcert it is
288 renegotiated requesting a certificate.
291 *) Add an "external" session cache for debugging purposes to s_server. This
292 should help trace issues which normally are only apparent in deployed
293 multi-process servers.
296 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
297 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
298 BIO_set_cipher() and some obscure PEM functions were changed so they
299 can now return an error. The RAND changes required a change to the
300 RAND_METHOD structure.
303 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
304 a gcc attribute to warn if the result of a function is ignored. This
305 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
306 whose return value is often ignored.
309 Changes between 1.0.1c and 1.0.1d [xx XXX xxxx]
311 *) Fix possible deadlock when decoding public keys.
314 *) Don't use TLS 1.0 record version number in initial client hello
318 Changes between 1.0.1b and 1.0.1c [10 May 2012]
320 *) Sanity check record length before skipping explicit IV in TLS
321 1.2, 1.1 and DTLS to avoid DoS attack.
323 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
324 fuzzing as a service testing platform.
328 *) Initialise tkeylen properly when encrypting CMS messages.
329 Thanks to Solar Designer of Openwall for reporting this issue.
332 *) In FIPS mode don't try to use composite ciphers as they are not
336 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
338 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
339 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
340 mean any application compiled against OpenSSL 1.0.0 headers setting
341 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
342 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
343 0x10000000L Any application which was previously compiled against
344 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
345 will need to be recompiled as a result. Letting be results in
346 inability to disable specifically TLS 1.1 and in client context,
347 in unlike event, limit maximum offered version to TLS 1.0 [see below].
350 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
351 disable just protocol X, but all protocols above X *if* there are
352 protocols *below* X still enabled. In more practical terms it means
353 that if application wants to disable TLS1.0 in favor of TLS1.1 and
354 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
355 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
359 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
361 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
362 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
363 in CRYPTO_realloc_clean.
365 Thanks to Tavis Ormandy, Google Security Team, for discovering this
366 issue and to Adam Langley <agl@chromium.org> for fixing it.
368 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
370 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
373 *) Workarounds for some broken servers that "hang" if a client hello
374 record length exceeds 255 bytes:
376 1. Do not use record version number > TLS 1.0 in initial client
377 hello: some (but not all) hanging servers will now work.
378 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
379 the number of ciphers sent in the client hello. This should be
380 set to an even number, such as 50, for example by passing:
381 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
382 Most broken servers should now work.
383 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
384 TLS 1.2 client support entirely.
387 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
390 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
392 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
393 STRING form instead of a DigestInfo.
396 *) The format used for MDC2 RSA signatures is inconsistent between EVP
397 and the RSA_sign/RSA_verify functions. This was made more apparent when
398 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
399 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
400 the correct format in RSA_verify so both forms transparently work.
403 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
404 STRING form instead of a DigestInfo.
407 *) Some servers which support TLS 1.0 can choke if we initially indicate
408 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
409 encrypted premaster secret. As a workaround use the maximum pemitted
410 client version in client hello, this should keep such servers happy
411 and still work with previous versions of OpenSSL.
414 *) Add support for TLS/DTLS heartbeats.
415 [Robin Seggelmann <seggelmann@fh-muenster.de>]
417 *) Add support for SCTP.
418 [Robin Seggelmann <seggelmann@fh-muenster.de>]
420 *) Improved PRNG seeding for VOS.
421 [Paul Green <Paul.Green@stratus.com>]
423 *) Extensive assembler packs updates, most notably:
425 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
426 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
427 - x86_64: bit-sliced AES implementation;
428 - ARM: NEON support, contemporary platforms optimizations;
429 - s390x: z196 support;
430 - *: GHASH and GF(2^m) multiplication implementations;
434 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
435 (removal of unnecessary code)
436 [Peter Sylvester <peter.sylvester@edelweb.fr>]
438 *) Add TLS key material exporter from RFC 5705.
441 *) Add DTLS-SRTP negotiation from RFC 5764.
444 *) Add Next Protocol Negotiation,
445 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
446 disabled with a no-npn flag to config or Configure. Code donated
448 [Adam Langley <agl@google.com> and Ben Laurie]
450 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
451 NIST-P256, NIST-P521, with constant-time single point multiplication on
452 typical inputs. Compiler support for the nonstandard type __uint128_t is
453 required to use this (present in gcc 4.4 and later, for 64-bit builds).
454 Code made available under Apache License version 2.0.
456 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
457 line to include this in your build of OpenSSL, and run "make depend" (or
458 "make update"). This enables the following EC_METHODs:
460 EC_GFp_nistp224_method()
461 EC_GFp_nistp256_method()
462 EC_GFp_nistp521_method()
464 EC_GROUP_new_by_curve_name() will automatically use these (while
465 EC_GROUP_new_curve_GFp() currently prefers the more flexible
467 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
469 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
470 all platforms. Move ssize_t definition from e_os.h to the public
471 header file e_os2.h as it now appears in public header file cms.h
474 *) New -sigopt option to the ca, req and x509 utilities. Additional
475 signature parameters can be passed using this option and in
479 *) Add RSA PSS signing function. This will generate and set the
480 appropriate AlgorithmIdentifiers for PSS based on those in the
481 corresponding EVP_MD_CTX structure. No application support yet.
484 *) Support for companion algorithm specific ASN1 signing routines.
485 New function ASN1_item_sign_ctx() signs a pre-initialised
486 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
487 the appropriate parameters.
490 *) Add new algorithm specific ASN1 verification initialisation function
491 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
492 handling will be the same no matter what EVP_PKEY_METHOD is used.
493 Add a PSS handler to support verification of PSS signatures: checked
494 against a number of sample certificates.
497 *) Add signature printing for PSS. Add PSS OIDs.
498 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
500 *) Add algorithm specific signature printing. An individual ASN1 method
501 can now print out signatures instead of the standard hex dump.
503 More complex signatures (e.g. PSS) can print out more meaningful
504 information. Include DSA version that prints out the signature
508 *) Password based recipient info support for CMS library: implementing
512 *) Split password based encryption into PBES2 and PBKDF2 functions. This
513 neatly separates the code into cipher and PBE sections and is required
514 for some algorithms that split PBES2 into separate pieces (such as
518 *) Session-handling fixes:
519 - Fix handling of connections that are resuming with a session ID,
520 but also support Session Tickets.
521 - Fix a bug that suppressed issuing of a new ticket if the client
522 presented a ticket with an expired session.
523 - Try to set the ticket lifetime hint to something reasonable.
524 - Make tickets shorter by excluding irrelevant information.
525 - On the client side, don't ignore renewed tickets.
526 [Adam Langley, Bodo Moeller (Google)]
528 *) Fix PSK session representation.
531 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
533 This work was sponsored by Intel.
536 *) Add GCM support to TLS library. Some custom code is needed to split
537 the IV between the fixed (from PRF) and explicit (from TLS record)
538 portions. This adds all GCM ciphersuites supported by RFC5288 and
539 RFC5289. Generalise some AES* cipherstrings to inlclude GCM and
540 add a special AESGCM string for GCM only.
543 *) Expand range of ctrls for AES GCM. Permit setting invocation
544 field on decrypt and retrieval of invocation field only on encrypt.
547 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
548 As required by RFC5289 these ciphersuites cannot be used if for
549 versions of TLS earlier than 1.2.
552 *) For FIPS capable OpenSSL interpret a NULL default public key method
553 as unset and return the appopriate default but do *not* set the default.
554 This means we can return the appopriate method in applications that
555 swicth between FIPS and non-FIPS modes.
558 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
559 ENGINE is used then we cannot handle that in the FIPS module so we
560 keep original code iff non-FIPS operations are allowed.
563 *) Add -attime option to openssl utilities.
564 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
566 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
569 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
570 FIPS EC methods unconditionally for now.
573 *) New build option no-ec2m to disable characteristic 2 code.
576 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
577 all cases can be covered as some introduce binary incompatibilities.
580 *) Redirect RSA operations to FIPS module including keygen,
581 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
584 *) Add similar low level API blocking to ciphers.
587 *) Low level digest APIs are not approved in FIPS mode: any attempt
588 to use these will cause a fatal error. Applications that *really* want
589 to use them can use the private_* version instead.
592 *) Redirect cipher operations to FIPS module for FIPS builds.
595 *) Redirect digest operations to FIPS module for FIPS builds.
598 *) Update build system to add "fips" flag which will link in fipscanister.o
599 for static and shared library builds embedding a signature if needed.
602 *) Output TLS supported curves in preference order instead of numerical
603 order. This is currently hardcoded for the highest order curves first.
604 This should be configurable so applications can judge speed vs strength.
607 *) Add TLS v1.2 server support for client authentication.
610 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
614 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
615 FIPS modules versions.
618 *) Add TLS v1.2 client side support for client authentication. Keep cache
619 of handshake records longer as we don't know the hash algorithm to use
620 until after the certificate request message is received.
623 *) Initial TLS v1.2 client support. Add a default signature algorithms
624 extension including all the algorithms we support. Parse new signature
625 format in client key exchange. Relax some ECC signing restrictions for
626 TLS v1.2 as indicated in RFC5246.
629 *) Add server support for TLS v1.2 signature algorithms extension. Switch
630 to new signature format when needed using client digest preference.
631 All server ciphersuites should now work correctly in TLS v1.2. No client
632 support yet and no support for client certificates.
635 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
636 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
637 ciphersuites. At present only RSA key exchange ciphersuites work with
638 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
639 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
640 and version checking.
643 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
644 with this defined it will not be affected by any changes to ssl internal
645 structures. Add several utility functions to allow openssl application
646 to work with OPENSSL_NO_SSL_INTERN defined.
650 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
652 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
655 *) Permit abbreviated handshakes when renegotiating using the function
656 SSL_renegotiate_abbreviated().
657 [Robin Seggelmann <seggelmann@fh-muenster.de>]
659 *) Add call to ENGINE_register_all_complete() to
660 ENGINE_load_builtin_engines(), so some implementations get used
661 automatically instead of needing explicit application support.
664 *) Add support for TLS key exporter as described in RFC5705.
665 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
667 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
668 a few changes are required:
670 Add SSL_OP_NO_TLSv1_1 flag.
672 Update version checking logic to handle version 1.1.
673 Add explicit IV handling (ported from DTLS code).
674 Add command line options to s_client/s_server.
677 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
679 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
680 in CMS and PKCS7 code. When RSA decryption fails use a random key for
681 content decryption and always return the same error. Note: this attack
682 needs on average 2^20 messages so it only affects automated senders. The
683 old behaviour can be reenabled in the CMS code by setting the
684 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
685 an MMA defence is not necessary.
686 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
687 this issue. (CVE-2012-0884)
690 *) Fix CVE-2011-4619: make sure we really are receiving a
691 client hello before rejecting multiple SGC restarts. Thanks to
692 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
695 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
697 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
698 Thanks to Antonio Martin, Enterprise Secure Access Research and
699 Development, Cisco Systems, Inc. for discovering this bug and
700 preparing a fix. (CVE-2012-0050)
703 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
705 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
706 of the Vaudenay padding oracle attack on CBC mode encryption
707 which enables an efficient plaintext recovery attack against
708 the OpenSSL implementation of DTLS. Their attack exploits timing
709 differences arising during decryption processing. A research
710 paper describing this attack can be found at:
711 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
712 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
713 Security Group at Royal Holloway, University of London
714 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
715 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
716 for preparing the fix. (CVE-2011-4108)
717 [Robin Seggelmann, Michael Tuexen]
719 *) Clear bytes used for block padding of SSL 3.0 records.
721 [Adam Langley (Google)]
723 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
724 Kadianakis <desnacked@gmail.com> for discovering this issue and
725 Adam Langley for preparing the fix. (CVE-2011-4619)
726 [Adam Langley (Google)]
728 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
729 [Andrey Kulikov <amdeich@gmail.com>]
731 *) Prevent malformed RFC3779 data triggering an assertion failure.
732 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
733 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
734 [Rob Austein <sra@hactrn.net>]
736 *) Improved PRNG seeding for VOS.
737 [Paul Green <Paul.Green@stratus.com>]
739 *) Fix ssl_ciph.c set-up race.
740 [Adam Langley (Google)]
742 *) Fix spurious failures in ecdsatest.c.
743 [Emilia Käsper (Google)]
745 *) Fix the BIO_f_buffer() implementation (which was mixing different
746 interpretations of the '..._len' fields).
747 [Adam Langley (Google)]
749 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
750 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
751 threads won't reuse the same blinding coefficients.
753 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
754 lock to call BN_BLINDING_invert_ex, and avoids one use of
755 BN_BLINDING_update for each BN_BLINDING structure (previously,
756 the last update always remained unused).
757 [Emilia Käsper (Google)]
759 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
760 [Bob Buckholz (Google)]
762 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
764 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
765 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
766 [Kaspar Brand <ossl@velox.ch>]
768 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
769 for multi-threaded use of ECDH. (CVE-2011-3210)
770 [Adam Langley (Google)]
772 *) Fix x509_name_ex_d2i memory leak on bad inputs.
775 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
776 signature public key algorithm by using OID xref utilities instead.
777 Before this you could only use some ECC ciphersuites with SHA1 only.
780 *) Add protection against ECDSA timing attacks as mentioned in the paper
781 by Billy Bob Brumley and Nicola Tuveri, see:
783 http://eprint.iacr.org/2011/232.pdf
785 [Billy Bob Brumley and Nicola Tuveri]
787 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
789 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
790 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
792 *) Fix bug in string printing code: if *any* escaping is enabled we must
793 escape the escape character (backslash) or the resulting string is
797 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
799 *) Disable code workaround for ancient and obsolete Netscape browsers
800 and servers: an attacker can use it in a ciphersuite downgrade attack.
801 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
804 *) Fixed J-PAKE implementation error, originally discovered by
805 Sebastien Martini, further info and confirmation from Stefan
806 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
809 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
811 *) Fix extension code to avoid race conditions which can result in a buffer
812 overrun vulnerability: resumed sessions must not be modified as they can
813 be shared by multiple threads. CVE-2010-3864
816 *) Fix WIN32 build system to correctly link an ENGINE directory into
820 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
822 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
824 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
826 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
828 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
829 context. The operation can be customised via the ctrl mechanism in
830 case ENGINEs want to include additional functionality.
833 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
836 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
837 output hashes compatible with older versions of OpenSSL.
838 [Willy Weisz <weisz@vcpc.univie.ac.at>]
840 *) Fix compression algorithm handling: if resuming a session use the
841 compression algorithm of the resumed session instead of determining
842 it from client hello again. Don't allow server to change algorithm.
845 *) Add load_crls() function to apps tidying load_certs() too. Add option
846 to verify utility to allow additional CRLs to be included.
849 *) Update OCSP request code to permit adding custom headers to the request:
850 some responders need this.
853 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
855 [Julia Lawall <julia@diku.dk>]
857 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
858 needlessly dereferenced structures, used obsolete functions and
859 didn't handle all updated verify codes correctly.
862 *) Disable MD2 in the default configuration.
865 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
866 indicate the initial BIO being pushed or popped. This makes it possible
867 to determine whether the BIO is the one explicitly called or as a result
868 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
869 it handles reference counts correctly and doesn't zero out the I/O bio
870 when it is not being explicitly popped. WARNING: applications which
871 included workarounds for the old buggy behaviour will need to be modified
872 or they could free up already freed BIOs.
875 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
876 renaming to all platforms (within the 0.9.8 branch, this was
877 done conditionally on Netware platforms to avoid a name clash).
878 [Guenter <lists@gknw.net>]
880 *) Add ECDHE and PSK support to DTLS.
881 [Michael Tuexen <tuexen@fh-muenster.de>]
883 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
887 *) Add "missing" function EVP_MD_flags() (without this the only way to
888 retrieve a digest flags is by accessing the structure directly. Update
889 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
890 or cipher is registered as in the "from" argument. Print out all
891 registered digests in the dgst usage message instead of manually
892 attempting to work them out.
895 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
896 this allows the use of compression and extensions. Change default cipher
897 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
898 by default unless an application cipher string requests it.
901 *) Alter match criteria in PKCS12_parse(). It used to try to use local
902 key ids to find matching certificates and keys but some PKCS#12 files
903 don't follow the (somewhat unwritten) rules and this strategy fails.
904 Now just gather all certificates together and the first private key
905 then look for the first certificate that matches the key.
908 *) Support use of registered digest and cipher names for dgst and cipher
909 commands instead of having to add each one as a special case. So now
916 openssl dgst -sha256 foo
918 and this works for ENGINE based algorithms too.
922 *) Update Gost ENGINE to support parameter files.
923 [Victor B. Wagner <vitus@cryptocom.ru>]
925 *) Support GeneralizedTime in ca utility.
926 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
928 *) Enhance the hash format used for certificate directory links. The new
929 form uses the canonical encoding (meaning equivalent names will work
930 even if they aren't identical) and uses SHA1 instead of MD5. This form
931 is incompatible with the older format and as a result c_rehash should
932 be used to rebuild symbolic links.
935 *) Make PKCS#8 the default write format for private keys, replacing the
936 traditional format. This form is standardised, more secure and doesn't
937 include an implicit MD5 dependency.
940 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
941 committed to OpenSSL should pass this lot as a minimum.
944 *) Add session ticket override functionality for use by EAP-FAST.
945 [Jouni Malinen <j@w1.fi>]
947 *) Modify HMAC functions to return a value. Since these can be implemented
948 in an ENGINE errors can occur.
951 *) Type-checked OBJ_bsearch_ex.
954 *) Type-checked OBJ_bsearch. Also some constification necessitated
955 by type-checking. Still to come: TXT_DB, bsearch(?),
956 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
960 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
961 seconds to a tm structure directly, instead of going through OS
962 specific date routines. This avoids any issues with OS routines such
963 as the year 2038 bug. New *_adj() functions for ASN1 time structures
964 and X509_time_adj_ex() to cover the extended range. The existing
965 X509_time_adj() is still usable and will no longer have any date issues.
968 *) Delta CRL support. New use deltas option which will attempt to locate
969 and search any appropriate delta CRLs available.
971 This work was sponsored by Google.
974 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
975 code and add additional score elements. Validate alternate CRL paths
976 as part of the CRL checking and indicate a new error "CRL path validation
977 error" in this case. Applications wanting additional details can use
978 the verify callback and check the new "parent" field. If this is not
979 NULL CRL path validation is taking place. Existing applications wont
980 see this because it requires extended CRL support which is off by
983 This work was sponsored by Google.
986 *) Support for freshest CRL extension.
988 This work was sponsored by Google.
991 *) Initial indirect CRL support. Currently only supported in the CRLs
992 passed directly and not via lookup. Process certificate issuer
993 CRL entry extension and lookup CRL entries by bother issuer name
994 and serial number. Check and process CRL issuer entry in IDP extension.
996 This work was sponsored by Google.
999 *) Add support for distinct certificate and CRL paths. The CRL issuer
1000 certificate is validated separately in this case. Only enabled if
1001 an extended CRL support flag is set: this flag will enable additional
1002 CRL functionality in future.
1004 This work was sponsored by Google.
1007 *) Add support for policy mappings extension.
1009 This work was sponsored by Google.
1012 *) Fixes to pathlength constraint, self issued certificate handling,
1013 policy processing to align with RFC3280 and PKITS tests.
1015 This work was sponsored by Google.
1018 *) Support for name constraints certificate extension. DN, email, DNS
1019 and URI types are currently supported.
1021 This work was sponsored by Google.
1024 *) To cater for systems that provide a pointer-based thread ID rather
1025 than numeric, deprecate the current numeric thread ID mechanism and
1026 replace it with a structure and associated callback type. This
1027 mechanism allows a numeric "hash" to be extracted from a thread ID in
1028 either case, and on platforms where pointers are larger than 'long',
1029 mixing is done to help ensure the numeric 'hash' is usable even if it
1030 can't be guaranteed unique. The default mechanism is to use "&errno"
1031 as a pointer-based thread ID to distinguish between threads.
1033 Applications that want to provide their own thread IDs should now use
1034 CRYPTO_THREADID_set_callback() to register a callback that will call
1035 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
1037 Note that ERR_remove_state() is now deprecated, because it is tied
1038 to the assumption that thread IDs are numeric. ERR_remove_state(0)
1039 to free the current thread's error state should be replaced by
1040 ERR_remove_thread_state(NULL).
1042 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
1043 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
1044 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
1045 application was previously providing a numeric thread callback that
1046 was inappropriate for distinguishing threads, then uniqueness might
1047 have been obtained with &errno that happened immediately in the
1048 intermediate development versions of OpenSSL; this is no longer the
1049 case, the numeric thread callback will now override the automatic use
1051 [Geoff Thorpe, with help from Bodo Moeller]
1053 *) Initial support for different CRL issuing certificates. This covers a
1054 simple case where the self issued certificates in the chain exist and
1055 the real CRL issuer is higher in the existing chain.
1057 This work was sponsored by Google.
1060 *) Removed effectively defunct crypto/store from the build.
1063 *) Revamp of STACK to provide stronger type-checking. Still to come:
1064 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
1065 ASN1_STRING, CONF_VALUE.
1068 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
1069 RAM on SSL connections. This option can save about 34k per idle SSL.
1072 *) Revamp of LHASH to provide stronger type-checking. Still to come:
1073 STACK, TXT_DB, bsearch, qsort.
1076 *) Initial support for Cryptographic Message Syntax (aka CMS) based
1077 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
1078 support for data, signedData, compressedData, digestedData and
1079 encryptedData, envelopedData types included. Scripts to check against
1080 RFC4134 examples draft and interop and consistency checks of many
1081 content types and variants.
1084 *) Add options to enc utility to support use of zlib compression BIO.
1087 *) Extend mk1mf to support importing of options and assembly language
1088 files from Configure script, currently only included in VC-WIN32.
1089 The assembly language rules can now optionally generate the source
1090 files from the associated perl scripts.
1093 *) Implement remaining functionality needed to support GOST ciphersuites.
1094 Interop testing has been performed using CryptoPro implementations.
1095 [Victor B. Wagner <vitus@cryptocom.ru>]
1097 *) s390x assembler pack.
1100 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
1104 *) Implement Opaque PRF Input TLS extension as specified in
1105 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
1106 official specification yet and no extension type assignment by
1107 IANA exists, this extension (for now) will have to be explicitly
1108 enabled when building OpenSSL by providing the extension number
1109 to use. For example, specify an option
1111 -DTLSEXT_TYPE_opaque_prf_input=0x9527
1113 to the "config" or "Configure" script to enable the extension,
1114 assuming extension number 0x9527 (which is a completely arbitrary
1115 and unofficial assignment based on the MD5 hash of the Internet
1116 Draft). Note that by doing so, you potentially lose
1117 interoperability with other TLS implementations since these might
1118 be using the same extension number for other purposes.
1120 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
1121 opaque PRF input value to use in the handshake. This will create
1122 an interal copy of the length-'len' string at 'src', and will
1123 return non-zero for success.
1125 To get more control and flexibility, provide a callback function
1128 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
1129 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
1133 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
1136 Callback function 'cb' will be called in handshakes, and is
1137 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
1138 Argument 'arg' is for application purposes (the value as given to
1139 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
1140 be provided to the callback function). The callback function
1141 has to return non-zero to report success: usually 1 to use opaque
1142 PRF input just if possible, or 2 to enforce use of the opaque PRF
1143 input. In the latter case, the library will abort the handshake
1144 if opaque PRF input is not successfully negotiated.
1146 Arguments 'peerinput' and 'len' given to the callback function
1147 will always be NULL and 0 in the case of a client. A server will
1148 see the client's opaque PRF input through these variables if
1149 available (NULL and 0 otherwise). Note that if the server
1150 provides an opaque PRF input, the length must be the same as the
1151 length of the client's opaque PRF input.
1153 Note that the callback function will only be called when creating
1154 a new session (session resumption can resume whatever was
1155 previously negotiated), and will not be called in SSL 2.0
1156 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
1157 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
1158 for applications that need to enforce opaque PRF input.
1162 *) Update ssl code to support digests other than SHA1+MD5 for handshake
1165 [Victor B. Wagner <vitus@cryptocom.ru>]
1167 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1168 RFC4507bis. The encrypted ticket format is an encrypted encoded
1169 SSL_SESSION structure, that way new session features are automatically
1172 If a client application caches session in an SSL_SESSION structure
1173 support is transparent because tickets are now stored in the encoded
1176 The SSL_CTX structure automatically generates keys for ticket
1177 protection in servers so again support should be possible
1178 with no application modification.
1180 If a client or server wishes to disable RFC4507 support then the option
1181 SSL_OP_NO_TICKET can be set.
1183 Add a TLS extension debugging callback to allow the contents of any client
1184 or server extensions to be examined.
1186 This work was sponsored by Google.
1189 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
1190 OpenSSL should now compile cleanly on gcc 4.2
1191 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
1193 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
1194 support including streaming MAC support: this is required for GOST
1195 ciphersuite support.
1196 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
1198 *) Add option -stream to use PKCS#7 streaming in smime utility. New
1199 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
1200 to output in BER and PEM format.
1203 *) Experimental support for use of HMAC via EVP_PKEY interface. This
1204 allows HMAC to be handled via the EVP_DigestSign*() interface. The
1205 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
1206 ENGINE support for HMAC keys which are unextractable. New -mac and
1207 -macopt options to dgst utility.
1210 *) New option -sigopt to dgst utility. Update dgst to use
1211 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
1212 alternative signing paramaters such as X9.31 or PSS in the dgst
1216 *) Change ssl_cipher_apply_rule(), the internal function that does
1217 the work each time a ciphersuite string requests enabling
1218 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
1219 removing ("!foo+bar") a class of ciphersuites: Now it maintains
1220 the order of disabled ciphersuites such that those ciphersuites
1221 that most recently went from enabled to disabled not only stay
1222 in order with respect to each other, but also have higher priority
1223 than other disabled ciphersuites the next time ciphersuites are
1226 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
1227 the same ciphersuites as with "HIGH" alone, but in a specific
1228 order where the PSK ciphersuites come first (since they are the
1229 most recently disabled ciphersuites when "HIGH" is parsed).
1231 Also, change ssl_create_cipher_list() (using this new
1232 funcionality) such that between otherwise identical
1233 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
1237 *) Change ssl_create_cipher_list() so that it automatically
1238 arranges the ciphersuites in reasonable order before starting
1239 to process the rule string. Thus, the definition for "DEFAULT"
1240 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
1241 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
1242 This makes it much easier to arrive at a reasonable default order
1243 in applications for which anonymous ciphers are OK (meaning
1244 that you can't actually use DEFAULT).
1245 [Bodo Moeller; suggested by Victor Duchovni]
1247 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
1248 processing) into multiple integers instead of setting
1249 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
1250 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
1251 (These masks as well as the individual bit definitions are hidden
1252 away into the non-exported interface ssl/ssl_locl.h, so this
1253 change to the definition of the SSL_CIPHER structure shouldn't
1254 affect applications.) This give us more bits for each of these
1255 categories, so there is no longer a need to coagulate AES128 and
1256 AES256 into a single algorithm bit, and to coagulate Camellia128
1257 and Camellia256 into a single algorithm bit, which has led to all
1260 Thus, among other things, the kludge introduced in 0.9.7m and
1261 0.9.8e for masking out AES256 independently of AES128 or masking
1262 out Camellia256 independently of AES256 is not needed here in 0.9.9.
1264 With the change, we also introduce new ciphersuite aliases that
1265 so far were missing: "AES128", "AES256", "CAMELLIA128", and
1269 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
1270 Use the leftmost N bytes of the signature input if the input is
1271 larger than the prime q (with N being the size in bytes of q).
1274 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
1275 it yet and it is largely untested.
1278 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
1281 *) Initial incomplete changes to avoid need for function casts in OpenSSL
1282 some compilers (gcc 4.2 and later) reject their use. Safestack is
1283 reimplemented. Update ASN1 to avoid use of legacy functions.
1286 *) Win32/64 targets are linked with Winsock2.
1289 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
1290 to external functions. This can be used to increase CRL handling
1291 efficiency especially when CRLs are very large by (for example) storing
1292 the CRL revoked certificates in a database.
1295 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
1296 new CRLs added to a directory can be used. New command line option
1297 -verify_return_error to s_client and s_server. This causes real errors
1298 to be returned by the verify callback instead of carrying on no matter
1299 what. This reflects the way a "real world" verify callback would behave.
1302 *) GOST engine, supporting several GOST algorithms and public key formats.
1303 Kindly donated by Cryptocom.
1306 *) Partial support for Issuing Distribution Point CRL extension. CRLs
1307 partitioned by DP are handled but no indirect CRL or reason partitioning
1308 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
1309 selected via a scoring technique which handles IDP and AKID in CRLs.
1312 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
1313 will ultimately be used for all verify operations: this will remove the
1314 X509_STORE dependency on certificate verification and allow alternative
1315 lookup methods. X509_STORE based implementations of these two callbacks.
1318 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
1319 Modify get_crl() to find a valid (unexpired) CRL if possible.
1322 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
1323 this would be called X509_CRL_cmp() but that name is already used by
1324 a function that just compares CRL issuer names. Cache several CRL
1325 extensions in X509_CRL structure and cache CRLDP in X509.
1328 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
1329 this maps equivalent X509_NAME structures into a consistent structure.
1330 Name comparison can then be performed rapidly using memcmp().
1333 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
1337 *) Allow digests to supply their own micalg string for S/MIME type using
1338 the ctrl EVP_MD_CTRL_MICALG.
1341 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
1342 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
1343 ctrl. It can then customise the structure before and/or after signing
1347 *) New function OBJ_add_sigid() to allow application defined signature OIDs
1348 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
1349 to free up any added signature OIDs.
1352 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
1353 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
1354 digest and cipher tables. New options added to openssl utility:
1355 list-message-digest-algorithms and list-cipher-algorithms.
1358 *) Change the array representation of binary polynomials: the list
1359 of degrees of non-zero coefficients is now terminated with -1.
1360 Previously it was terminated with 0, which was also part of the
1361 value; thus, the array representation was not applicable to
1362 polynomials where t^0 has coefficient zero. This change makes
1363 the array representation useful in a more general context.
1366 *) Various modifications and fixes to SSL/TLS cipher string
1367 handling. For ECC, the code now distinguishes between fixed ECDH
1368 with RSA certificates on the one hand and with ECDSA certificates
1369 on the other hand, since these are separate ciphersuites. The
1370 unused code for Fortezza ciphersuites has been removed.
1372 For consistency with EDH, ephemeral ECDH is now called "EECDH"
1373 (not "ECDHE"). For consistency with the code for DH
1374 certificates, use of ECDH certificates is now considered ECDH
1375 authentication, not RSA or ECDSA authentication (the latter is
1376 merely the CA's signing algorithm and not actively used in the
1379 The temporary ciphersuite alias "ECCdraft" is no longer
1380 available, and ECC ciphersuites are no longer excluded from "ALL"
1381 and "DEFAULT". The following aliases now exist for RFC 4492
1382 ciphersuites, most of these by analogy with the DH case:
1384 kECDHr - ECDH cert, signed with RSA
1385 kECDHe - ECDH cert, signed with ECDSA
1386 kECDH - ECDH cert (signed with either RSA or ECDSA)
1387 kEECDH - ephemeral ECDH
1388 ECDH - ECDH cert or ephemeral ECDH
1394 AECDH - anonymous ECDH
1395 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
1399 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
1400 Use correct micalg parameters depending on digest(s) in signed message.
1403 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
1404 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
1407 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
1408 an engine to register a method. Add ENGINE lookups for methods and
1409 functional reference processing.
1412 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
1413 EVP_{Sign,Verify}* which allow an application to customise the signature
1417 *) New -resign option to smime utility. This adds one or more signers
1418 to an existing PKCS#7 signedData structure. Also -md option to use an
1419 alternative message digest algorithm for signing.
1422 *) Tidy up PKCS#7 routines and add new functions to make it easier to
1423 create PKCS7 structures containing multiple signers. Update smime
1424 application to support multiple signers.
1427 *) New -macalg option to pkcs12 utility to allow setting of an alternative
1431 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
1432 Reorganize PBE internals to lookup from a static table using NIDs,
1433 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
1434 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
1435 PRF which will be automatically used with PBES2.
1438 *) Replace the algorithm specific calls to generate keys in "req" with the
1442 *) Update PKCS#7 enveloped data routines to use new API. This is now
1443 supported by any public key method supporting the encrypt operation. A
1444 ctrl is added to allow the public key algorithm to examine or modify
1445 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
1449 *) Add a ctrl to asn1 method to allow a public key algorithm to express
1450 a default digest type to use. In most cases this will be SHA1 but some
1451 algorithms (such as GOST) need to specify an alternative digest. The
1452 return value indicates how strong the prefernce is 1 means optional and
1453 2 is mandatory (that is it is the only supported type). Modify
1454 ASN1_item_sign() to accept a NULL digest argument to indicate it should
1455 use the default md. Update openssl utilities to use the default digest
1456 type for signing if it is not explicitly indicated.
1459 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
1460 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
1461 signing method from the key type. This effectively removes the link
1462 between digests and public key types.
1465 *) Add an OID cross reference table and utility functions. Its purpose is to
1466 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
1467 rsaEncryption. This will allow some of the algorithm specific hackery
1468 needed to use the correct OID to be removed.
1471 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
1472 structures for PKCS7_sign(). They are now set up by the relevant public
1476 *) Add provisional EC pkey method with support for ECDSA and ECDH.
1479 *) Add support for key derivation (agreement) in the API, DH method and
1483 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
1484 public and private key formats. As a side effect these add additional
1485 command line functionality not previously available: DSA signatures can be
1486 generated and verified using pkeyutl and DH key support and generation in
1491 [Oliver Tappe <zooey@hirschkaefer.de>]
1493 *) New make target "install_html_docs" installs HTML renditions of the
1495 [Oliver Tappe <zooey@hirschkaefer.de>]
1497 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
1498 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
1499 support key and parameter generation and add initial key generation
1500 functionality for RSA.
1503 *) Add functions for main EVP_PKEY_method operations. The undocumented
1504 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
1505 EVP_PKEY_{encrypt,decrypt}_old.
1508 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
1509 key API, doesn't do much yet.
1512 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
1513 public key algorithms. New option to openssl utility:
1514 "list-public-key-algorithms" to print out info.
1517 *) Implement the Supported Elliptic Curves Extension for
1518 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1521 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
1522 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
1525 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
1526 utilities such as rsa, dsa, dsaparam etc except they process any key
1530 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
1531 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
1532 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
1536 *) Initial support for pluggable public key ASN1.
1537 De-spaghettify the public key ASN1 handling. Move public and private
1538 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
1539 algorithm specific handling to a single module within the relevant
1540 algorithm directory. Add functions to allow (near) opaque processing
1541 of public and private key structures.
1544 *) Implement the Supported Point Formats Extension for
1545 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1548 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
1549 for the psk identity [hint] and the psk callback functions to the
1550 SSL_SESSION, SSL and SSL_CTX structure.
1553 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
1557 SSL_CTX_use_psk_identity_hint
1558 SSL_get_psk_identity_hint
1559 SSL_get_psk_identity
1560 SSL_use_psk_identity_hint
1562 [Mika Kousa and Pasi Eronen of Nokia Corporation]
1564 *) Add RFC 3161 compliant time stamp request creation, response generation
1565 and response verification functionality.
1566 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
1568 *) Add initial support for TLS extensions, specifically for the server_name
1569 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1570 have new members for a host name. The SSL data structure has an
1571 additional member SSL_CTX *initial_ctx so that new sessions can be
1572 stored in that context to allow for session resumption, even after the
1573 SSL has been switched to a new SSL_CTX in reaction to a client's
1574 server_name extension.
1576 New functions (subject to change):
1578 SSL_get_servername()
1579 SSL_get_servername_type()
1582 New CTRL codes and macros (subject to change):
1584 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1585 - SSL_CTX_set_tlsext_servername_callback()
1586 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1587 - SSL_CTX_set_tlsext_servername_arg()
1588 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1590 openssl s_client has a new '-servername ...' option.
1592 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1593 '-key2 ...', '-servername_fatal' (subject to change). This allows
1594 testing the HostName extension for a specific single host name ('-cert'
1595 and '-key' remain fallbacks for handshakes without HostName
1596 negotiation). If the unrecogninzed_name alert has to be sent, this by
1597 default is a warning; it becomes fatal with the '-servername_fatal'
1600 [Peter Sylvester, Remy Allais, Christophe Renou]
1602 *) Whirlpool hash implementation is added.
1605 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
1606 bn(64,32). Because of instruction set limitations it doesn't have
1607 any negative impact on performance. This was done mostly in order
1608 to make it possible to share assembler modules, such as bn_mul_mont
1609 implementations, between 32- and 64-bit builds without hassle.
1612 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
1613 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
1617 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
1618 dedicated Montgomery multiplication procedure, is introduced.
1619 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
1620 "64-bit" performance on certain 32-bit targets.
1623 *) New option SSL_OP_NO_COMP to disable use of compression selectively
1624 in SSL structures. New SSL ctrl to set maximum send fragment size.
1625 Save memory by seeting the I/O buffer sizes dynamically instead of
1626 using the maximum available value.
1629 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
1630 in addition to the text details.
1633 *) Very, very preliminary EXPERIMENTAL support for printing of general
1634 ASN1 structures. This currently produces rather ugly output and doesn't
1635 handle several customised structures at all.
1638 *) Integrated support for PVK file format and some related formats such
1639 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
1640 these in the 'rsa' and 'dsa' utilities.
1643 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
1646 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
1647 place for the (very old) "NETSCAPE" format certificates which are now
1648 handled using new ASN1 code equivalents.
1651 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
1652 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
1653 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
1656 *) Modify CRL distribution points extension code to print out previously
1657 unsupported fields. Enhance extension setting code to allow setting of
1661 *) Add print and set support for Issuing Distribution Point CRL extension.
1664 *) Change 'Configure' script to enable Camellia by default.
1667 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
1669 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1670 Thanks to Antonio Martin, Enterprise Secure Access Research and
1671 Development, Cisco Systems, Inc. for discovering this bug and
1672 preparing a fix. (CVE-2012-0050)
1675 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
1677 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1678 of the Vaudenay padding oracle attack on CBC mode encryption
1679 which enables an efficient plaintext recovery attack against
1680 the OpenSSL implementation of DTLS. Their attack exploits timing
1681 differences arising during decryption processing. A research
1682 paper describing this attack can be found at:
1683 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1684 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1685 Security Group at Royal Holloway, University of London
1686 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1687 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1688 for preparing the fix. (CVE-2011-4108)
1689 [Robin Seggelmann, Michael Tuexen]
1691 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
1692 [Ben Laurie, Kasper <ekasper@google.com>]
1694 *) Clear bytes used for block padding of SSL 3.0 records.
1696 [Adam Langley (Google)]
1698 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1699 Kadianakis <desnacked@gmail.com> for discovering this issue and
1700 Adam Langley for preparing the fix. (CVE-2011-4619)
1701 [Adam Langley (Google)]
1703 *) Prevent malformed RFC3779 data triggering an assertion failure.
1704 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1705 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1706 [Rob Austein <sra@hactrn.net>]
1708 *) Fix ssl_ciph.c set-up race.
1709 [Adam Langley (Google)]
1711 *) Fix spurious failures in ecdsatest.c.
1712 [Emilia Käsper (Google)]
1714 *) Fix the BIO_f_buffer() implementation (which was mixing different
1715 interpretations of the '..._len' fields).
1716 [Adam Langley (Google)]
1718 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1719 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1720 threads won't reuse the same blinding coefficients.
1722 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1723 lock to call BN_BLINDING_invert_ex, and avoids one use of
1724 BN_BLINDING_update for each BN_BLINDING structure (previously,
1725 the last update always remained unused).
1726 [Emilia Käsper (Google)]
1728 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1729 for multi-threaded use of ECDH.
1730 [Adam Langley (Google)]
1732 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1735 *) Add protection against ECDSA timing attacks as mentioned in the paper
1736 by Billy Bob Brumley and Nicola Tuveri, see:
1738 http://eprint.iacr.org/2011/232.pdf
1740 [Billy Bob Brumley and Nicola Tuveri]
1742 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
1744 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1745 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1747 *) Fix bug in string printing code: if *any* escaping is enabled we must
1748 escape the escape character (backslash) or the resulting string is
1752 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
1754 *) Disable code workaround for ancient and obsolete Netscape browsers
1755 and servers: an attacker can use it in a ciphersuite downgrade attack.
1756 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1759 *) Fixed J-PAKE implementation error, originally discovered by
1760 Sebastien Martini, further info and confirmation from Stefan
1761 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1764 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
1766 *) Fix extension code to avoid race conditions which can result in a buffer
1767 overrun vulnerability: resumed sessions must not be modified as they can
1768 be shared by multiple threads. CVE-2010-3864
1771 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
1774 *) Don't reencode certificate when calculating signature: cache and use
1775 the original encoding instead. This makes signature verification of
1776 some broken encodings work correctly.
1779 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
1780 is also one of the inputs.
1781 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
1783 *) Don't repeatedly append PBE algorithms to table if they already exist.
1784 Sort table on each new add. This effectively makes the table read only
1785 after all algorithms are added and subsequent calls to PKCS12_pbe_add
1789 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
1791 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
1794 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
1795 access or freeing data twice (CVE-2010-0742)
1796 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
1798 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
1799 common in certificates and some applications which only call
1800 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
1804 Reduce copying into .apps and .test in makevms.com
1805 Don't try to use blank CA certificate in CA.com
1806 Allow use of C files from original directories in maketests.com
1807 [Steven M. Schweda" <sms@antinode.info>]
1809 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
1811 *) When rejecting SSL/TLS records due to an incorrect version number, never
1812 update s->server with a new major version number. As of
1813 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
1814 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
1815 the previous behavior could result in a read attempt at NULL when
1816 receiving specific incorrect SSL/TLS records once record payload
1817 protection is active. (CVE-2010-0740)
1818 [Bodo Moeller, Adam Langley <agl@chromium.org>]
1820 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
1821 could be crashed if the relevant tables were not present (e.g. chrooted).
1822 [Tomas Hoger <thoger@redhat.com>]
1824 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
1826 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
1827 [Martin Olsson, Neel Mehta]
1829 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
1830 accommodate for stack sorting, always a write lock!).
1833 *) On some versions of WIN32 Heap32Next is very slow. This can cause
1834 excessive delays in the RAND_poll(): over a minute. As a workaround
1835 include a time check in the inner Heap32Next loop too.
1838 *) The code that handled flushing of data in SSL/TLS originally used the
1839 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
1840 the problem outlined in PR#1949. The fix suggested there however can
1841 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
1842 of Apache). So instead simplify the code to flush unconditionally.
1843 This should be fine since flushing with no data to flush is a no op.
1846 *) Handle TLS versions 2.0 and later properly and correctly use the
1847 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
1848 off ancient servers have a habit of sticking around for a while...
1851 *) Modify compression code so it frees up structures without using the
1852 ex_data callbacks. This works around a problem where some applications
1853 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
1854 restarting) then use compression (e.g. SSL with compression) later.
1855 This results in significant per-connection memory leaks and
1856 has caused some security issues including CVE-2008-1678 and
1860 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
1861 change when encrypting or decrypting.
1864 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
1865 connect and renegotiate with servers which do not support RI.
1866 Until RI is more widely deployed this option is enabled by default.
1869 *) Add "missing" ssl ctrls to clear options and mode.
1872 *) If client attempts to renegotiate and doesn't support RI respond with
1873 a no_renegotiation alert as required by RFC5746. Some renegotiating
1874 TLS clients will continue a connection gracefully when they receive
1875 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1876 waiting for a server hello which it will never receive. Now we treat a
1877 received no_renegotiation alert as a fatal error. This is because
1878 applications requesting a renegotiation might well expect it to succeed
1879 and would have no code in place to handle the server denying it so the
1880 only safe thing to do is to terminate the connection.
1883 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1884 peer supports secure renegotiation and 0 otherwise. Print out peer
1885 renegotiation support in s_client/s_server.
1888 *) Replace the highly broken and deprecated SPKAC certification method with
1889 the updated NID creation version. This should correctly handle UTF8.
1892 *) Implement RFC5746. Re-enable renegotiation but require the extension
1893 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1894 turns out to be a bad idea. It has been replaced by
1895 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1896 SSL_CTX_set_options(). This is really not recommended unless you
1897 know what you are doing.
1898 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1900 *) Fixes to stateless session resumption handling. Use initial_ctx when
1901 issuing and attempting to decrypt tickets in case it has changed during
1902 servername handling. Use a non-zero length session ID when attempting
1903 stateless session resumption: this makes it possible to determine if
1904 a resumption has occurred immediately after receiving server hello
1905 (several places in OpenSSL subtly assume this) instead of later in
1909 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1910 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1911 fixes for a few places where the return code is not checked
1913 [Julia Lawall <julia@diku.dk>]
1915 *) Add --strict-warnings option to Configure script to include devteam
1916 warnings in other configurations.
1919 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1920 makes it possible to install openssl libraries in locations which
1921 have names other than "lib", for example "/usr/lib64" which some
1923 [Steve Henson, based on patch from Jeremy Utley]
1925 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1926 X690 8.9.12 and can produce some misleading textual output of OIDs.
1927 [Steve Henson, reported by Dan Kaminsky]
1929 *) Delete MD2 from algorithm tables. This follows the recommendation in
1930 several standards that it is not used in new applications due to
1931 several cryptographic weaknesses. For binary compatibility reasons
1932 the MD2 API is still compiled in by default.
1935 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1939 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1940 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1942 [Guenter <lists@gknw.net>]
1944 *) Fix the server certificate chain building code to use X509_verify_cert(),
1945 it used to have an ad-hoc builder which was unable to cope with anything
1946 other than a simple chain.
1947 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1949 *) Don't check self signed certificate signatures in X509_verify_cert()
1950 by default (a flag can override this): it just wastes time without
1951 adding any security. As a useful side effect self signed root CAs
1952 with non-FIPS digests are now usable in FIPS mode.
1955 *) In dtls1_process_out_of_seq_message() the check if the current message
1956 is already buffered was missing. For every new message was memory
1957 allocated, allowing an attacker to perform an denial of service attack
1958 with sending out of seq handshake messages until there is no memory
1959 left. Additionally every future messege was buffered, even if the
1960 sequence number made no sense and would be part of another handshake.
1961 So only messages with sequence numbers less than 10 in advance will be
1962 buffered. (CVE-2009-1378)
1963 [Robin Seggelmann, discovered by Daniel Mentz]
1965 *) Records are buffered if they arrive with a future epoch to be
1966 processed after finishing the corresponding handshake. There is
1967 currently no limitation to this buffer allowing an attacker to perform
1968 a DOS attack with sending records with future epochs until there is no
1969 memory left. This patch adds the pqueue_size() function to detemine
1970 the size of a buffer and limits the record buffer to 100 entries.
1972 [Robin Seggelmann, discovered by Daniel Mentz]
1974 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
1975 parent structure is freed. (CVE-2009-1379)
1978 *) Handle non-blocking I/O properly in SSL_shutdown() call.
1979 [Darryl Miles <darryl-mailinglists@netbauds.net>]
1982 [Ilya O. <vrghost@gmail.com>]
1984 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
1986 *) Disable renegotiation completely - this fixes a severe security
1987 problem (CVE-2009-3555) at the cost of breaking all
1988 renegotiation. Renegotiation can be re-enabled by setting
1989 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
1990 run-time. This is really not recommended unless you know what
1994 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
1996 *) Don't set val to NULL when freeing up structures, it is freed up by
1997 underlying code. If sizeof(void *) > sizeof(long) this can result in
1998 zeroing past the valid field. (CVE-2009-0789)
1999 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
2001 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
2002 checked correctly. This would allow some invalid signed attributes to
2003 appear to verify correctly. (CVE-2009-0591)
2004 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2006 *) Reject UniversalString and BMPString types with invalid lengths. This
2007 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
2008 a legal length. (CVE-2009-0590)
2011 *) Set S/MIME signing as the default purpose rather than setting it
2012 unconditionally. This allows applications to override it at the store
2016 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2017 to handle some structures.
2020 *) Improve efficiency of mem_gets: don't search whole buffer each time
2022 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2024 *) New -hex option for openssl rand.
2027 *) Print out UTF8String and NumericString when parsing ASN1.
2030 *) Support NumericString type for name components.
2033 *) Allow CC in the environment to override the automatically chosen
2034 compiler. Note that nothing is done to ensure flags work with the
2038 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2040 *) Properly check EVP_VerifyFinal() and similar return values
2042 [Ben Laurie, Bodo Moeller, Google Security Team]
2044 *) Enable TLS extensions by default.
2047 *) Allow the CHIL engine to be loaded, whether the application is
2048 multithreaded or not. (This does not release the developer from the
2049 obligation to set up the dynamic locking callbacks.)
2050 [Sander Temme <sander@temme.net>]
2052 *) Use correct exit code if there is an error in dgst command.
2053 [Steve Henson; problem pointed out by Roland Dirlewanger]
2055 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2056 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2059 *) Add experimental JPAKE support, including demo authentication in
2060 s_client and s_server.
2063 *) Set the comparison function in v3_addr_canonize().
2064 [Rob Austein <sra@hactrn.net>]
2066 *) Add support for XMPP STARTTLS in s_client.
2067 [Philip Paeps <philip@freebsd.org>]
2069 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2070 to ensure that even with this option, only ciphersuites in the
2071 server's preference list will be accepted. (Note that the option
2072 applies only when resuming a session, so the earlier behavior was
2073 just about the algorithm choice for symmetric cryptography.)
2076 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2078 *) Fix NULL pointer dereference if a DTLS server received
2079 ChangeCipherSpec as first record (CVE-2009-1386).
2082 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
2083 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2086 *) The fix in 0.9.8c that supposedly got rid of unsafe
2087 double-checked locking was incomplete for RSA blinding,
2088 addressing just one layer of what turns out to have been
2089 doubly unsafe triple-checked locking.
2091 So now fix this for real by retiring the MONT_HELPER macro
2092 in crypto/rsa/rsa_eay.c.
2094 [Bodo Moeller; problem pointed out by Marius Schilder]
2096 *) Various precautionary measures:
2098 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2100 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2101 (NB: This would require knowledge of the secret session ticket key
2102 to exploit, in which case you'd be SOL either way.)
2104 - Change bn_nist.c so that it will properly handle input BIGNUMs
2105 outside the expected range.
2107 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2110 [Neel Mehta, Bodo Moeller]
2112 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2113 the load fails. Useful for distros.
2114 [Ben Laurie and the FreeBSD team]
2116 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2119 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2122 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2124 This work was sponsored by Logica.
2127 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2128 keystores. Support for SSL/TLS client authentication too.
2129 Not compiled unless enable-capieng specified to Configure.
2131 This work was sponsored by Logica.
2134 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2135 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2136 attribute creation routines such as certifcate requests and PKCS#12
2140 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2142 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2143 handshake which could lead to a cilent crash as found using the
2144 Codenomicon TLS test suite (CVE-2008-1672)
2145 [Steve Henson, Mark Cox]
2147 *) Fix double free in TLS server name extensions which could lead to
2148 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2151 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2153 Clear the error queue to ensure that error entries left from
2154 older function calls do not interfere with the correct operation.
2155 [Lutz Jaenicke, Erik de Castro Lopo]
2157 *) Remove root CA certificates of commercial CAs:
2159 The OpenSSL project does not recommend any specific CA and does not
2160 have any policy with respect to including or excluding any CA.
2161 Therefore it does not make any sense to ship an arbitrary selection
2162 of root CA certificates with the OpenSSL software.
2165 *) RSA OAEP patches to fix two separate invalid memory reads.
2166 The first one involves inputs when 'lzero' is greater than
2167 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
2168 before the beginning of from). The second one involves inputs where
2169 the 'db' section contains nothing but zeroes (there is a one-byte
2170 invalid read after the end of 'db').
2171 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2173 *) Partial backport from 0.9.9-dev:
2175 Introduce bn_mul_mont (dedicated Montgomery multiplication
2176 procedure) as a candidate for BIGNUM assembler implementation.
2177 While 0.9.9-dev uses assembler for various architectures, only
2178 x86_64 is available by default here in the 0.9.8 branch, and
2179 32-bit x86 is available through a compile-time setting.
2181 To try the 32-bit x86 assembler implementation, use Configure
2182 option "enable-montasm" (which exists only for this backport).
2184 As "enable-montasm" for 32-bit x86 disclaims code stability
2185 anyway, in this constellation we activate additional code
2186 backported from 0.9.9-dev for further performance improvements,
2187 namely BN_from_montgomery_word. (To enable this otherwise,
2188 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
2190 [Andy Polyakov (backport partially by Bodo Moeller)]
2192 *) Add TLS session ticket callback. This allows an application to set
2193 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
2194 values. This is useful for key rollover for example where several key
2195 sets may exist with different names.
2198 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
2199 This was broken until now in 0.9.8 releases, such that the only way
2200 a registered ENGINE could be used (assuming it initialises
2201 successfully on the host) was to explicitly set it as the default
2202 for the relevant algorithms. This is in contradiction with 0.9.7
2203 behaviour and the documentation. With this fix, when an ENGINE is
2204 registered into a given algorithm's table of implementations, the
2205 'uptodate' flag is reset so that auto-discovery will be used next
2206 time a new context for that algorithm attempts to select an
2208 [Ian Lister (tweaked by Geoff Thorpe)]
2210 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
2211 implemention in the following ways:
2213 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
2216 Lack of BER streaming support means one pass streaming processing is
2217 only supported if data is detached: setting the streaming flag is
2218 ignored for embedded content.
2220 CMS support is disabled by default and must be explicitly enabled
2221 with the enable-cms configuration option.
2224 *) Update the GMP engine glue to do direct copies between BIGNUM and
2225 mpz_t when openssl and GMP use the same limb size. Otherwise the
2226 existing "conversion via a text string export" trick is still used.
2227 [Paul Sheer <paulsheer@gmail.com>]
2229 *) Zlib compression BIO. This is a filter BIO which compressed and
2230 uncompresses any data passed through it.
2233 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
2234 RFC3394 compatible AES key wrapping.
2237 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
2238 sets string data without copying. X509_ALGOR_set0() and
2239 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
2240 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
2241 from an X509_ATTRIBUTE structure optionally checking it occurs only
2242 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
2246 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
2247 to get the expected BN_FLG_CONSTTIME behavior.
2248 [Bodo Moeller (Google)]
2252 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
2253 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
2254 - added some more tests to do_tests.pl
2255 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
2256 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
2257 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
2258 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
2259 - various changes to netware.pl to enable gcc-cross builds on Win32
2261 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
2262 - various changes to fix missing prototype warnings
2263 - fixed x86nasm.pl to create correct asm files for NASM COFF output
2264 - added AES, WHIRLPOOL and CPUID assembler code to build files
2265 - added missing AES assembler make rules to mk1mf.pl
2266 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
2267 [Guenter Knauf <eflash@gmx.net>]
2269 *) Implement certificate status request TLS extension defined in RFC3546.
2270 A client can set the appropriate parameters and receive the encoded
2271 OCSP response via a callback. A server can query the supplied parameters
2272 and set the encoded OCSP response in the callback. Add simplified examples
2273 to s_client and s_server.
2276 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
2278 *) Fix various bugs:
2279 + Binary incompatibility of ssl_ctx_st structure
2280 + DTLS interoperation with non-compliant servers
2281 + Don't call get_session_cb() without proposed session
2282 + Fix ia64 assembler code
2283 [Andy Polyakov, Steve Henson]
2285 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
2287 *) DTLS Handshake overhaul. There were longstanding issues with
2288 OpenSSL DTLS implementation, which were making it impossible for
2289 RFC 4347 compliant client to communicate with OpenSSL server.
2290 Unfortunately just fixing these incompatibilities would "cut off"
2291 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
2292 server keeps tolerating non RFC compliant syntax. The opposite is
2293 not true, 0.9.8f client can not communicate with earlier server.
2294 This update even addresses CVE-2007-4995.
2297 *) Changes to avoid need for function casts in OpenSSL: some compilers
2298 (gcc 4.2 and later) reject their use.
2299 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
2302 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2303 RFC4507bis. The encrypted ticket format is an encrypted encoded
2304 SSL_SESSION structure, that way new session features are automatically
2307 If a client application caches session in an SSL_SESSION structure
2308 support is transparent because tickets are now stored in the encoded
2311 The SSL_CTX structure automatically generates keys for ticket
2312 protection in servers so again support should be possible
2313 with no application modification.
2315 If a client or server wishes to disable RFC4507 support then the option
2316 SSL_OP_NO_TICKET can be set.
2318 Add a TLS extension debugging callback to allow the contents of any client
2319 or server extensions to be examined.
2321 This work was sponsored by Google.
2324 *) Add initial support for TLS extensions, specifically for the server_name
2325 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2326 have new members for a host name. The SSL data structure has an
2327 additional member SSL_CTX *initial_ctx so that new sessions can be
2328 stored in that context to allow for session resumption, even after the
2329 SSL has been switched to a new SSL_CTX in reaction to a client's
2330 server_name extension.
2332 New functions (subject to change):
2334 SSL_get_servername()
2335 SSL_get_servername_type()
2338 New CTRL codes and macros (subject to change):
2340 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2341 - SSL_CTX_set_tlsext_servername_callback()
2342 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2343 - SSL_CTX_set_tlsext_servername_arg()
2344 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2346 openssl s_client has a new '-servername ...' option.
2348 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2349 '-key2 ...', '-servername_fatal' (subject to change). This allows
2350 testing the HostName extension for a specific single host name ('-cert'
2351 and '-key' remain fallbacks for handshakes without HostName
2352 negotiation). If the unrecogninzed_name alert has to be sent, this by
2353 default is a warning; it becomes fatal with the '-servername_fatal'
2356 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
2358 *) Add AES and SSE2 assembly language support to VC++ build.
2361 *) Mitigate attack on final subtraction in Montgomery reduction.
2364 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
2365 (which previously caused an internal error).
2368 *) Squeeze another 10% out of IGE mode when in != out.
2371 *) AES IGE mode speedup.
2372 [Dean Gaudet (Google)]
2374 *) Add the Korean symmetric 128-bit cipher SEED (see
2375 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
2376 add SEED ciphersuites from RFC 4162:
2378 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
2379 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
2380 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
2381 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
2383 To minimize changes between patchlevels in the OpenSSL 0.9.8
2384 series, SEED remains excluded from compilation unless OpenSSL
2385 is configured with 'enable-seed'.
2386 [KISA, Bodo Moeller]
2388 *) Mitigate branch prediction attacks, which can be practical if a
2389 single processor is shared, allowing a spy process to extract
2390 information. For detailed background information, see
2391 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
2392 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
2393 and Necessary Software Countermeasures"). The core of the change
2394 are new versions BN_div_no_branch() and
2395 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
2396 respectively, which are slower, but avoid the security-relevant
2397 conditional branches. These are automatically called by BN_div()
2398 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
2399 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
2400 remove a conditional branch.
2402 BN_FLG_CONSTTIME is the new name for the previous
2403 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
2404 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
2405 in the exponent causes BN_mod_exp_mont() to use the alternative
2406 implementation in BN_mod_exp_mont_consttime().) The old name
2407 remains as a deprecated alias.
2409 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
2410 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
2411 constant-time implementations for more than just exponentiation.
2412 Here too the old name is kept as a deprecated alias.
2414 BN_BLINDING_new() will now use BN_dup() for the modulus so that
2415 the BN_BLINDING structure gets an independent copy of the
2416 modulus. This means that the previous "BIGNUM *m" argument to
2417 BN_BLINDING_new() and to BN_BLINDING_create_param() now
2418 essentially becomes "const BIGNUM *m", although we can't actually
2419 change this in the header file before 0.9.9. It allows
2420 RSA_setup_blinding() to use BN_with_flags() on the modulus to
2421 enable BN_FLG_CONSTTIME.
2423 [Matthew D Wood (Intel Corp)]
2425 *) In the SSL/TLS server implementation, be strict about session ID
2426 context matching (which matters if an application uses a single
2427 external cache for different purposes). Previously,
2428 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
2429 set. This did ensure strict client verification, but meant that,
2430 with applications using a single external cache for quite
2431 different requirements, clients could circumvent ciphersuite
2432 restrictions for a given session ID context by starting a session
2433 in a different context.
2436 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2437 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2438 authentication-only ciphersuites.
2441 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
2442 not complete and could lead to a possible single byte overflow
2443 (CVE-2007-5135) [Ben Laurie]
2445 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
2447 *) Since AES128 and AES256 (and similarly Camellia128 and
2448 Camellia256) share a single mask bit in the logic of
2449 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2450 kludge to work properly if AES128 is available and AES256 isn't
2451 (or if Camellia128 is available and Camellia256 isn't).
2454 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
2455 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
2456 When a point or a seed is encoded in a BIT STRING, we need to
2457 prevent the removal of trailing zero bits to get the proper DER
2458 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
2459 of a NamedBitList, for which trailing 0 bits need to be removed.)
2462 *) Have SSL/TLS server implementation tolerate "mismatched" record
2463 protocol version while receiving ClientHello even if the
2464 ClientHello is fragmented. (The server can't insist on the
2465 particular protocol version it has chosen before the ServerHello
2466 message has informed the client about his choice.)
2469 *) Add RFC 3779 support.
2470 [Rob Austein for ARIN, Ben Laurie]
2472 *) Load error codes if they are not already present instead of using a
2473 static variable. This allows them to be cleanly unloaded and reloaded.
2474 Improve header file function name parsing.
2477 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
2478 or CAPABILITY handshake as required by RFCs.
2481 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
2483 *) Introduce limits to prevent malicious keys being able to
2484 cause a denial of service. (CVE-2006-2940)
2485 [Steve Henson, Bodo Moeller]
2487 *) Fix ASN.1 parsing of certain invalid structures that can result
2488 in a denial of service. (CVE-2006-2937) [Steve Henson]
2490 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2491 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2493 *) Fix SSL client code which could crash if connecting to a
2494 malicious SSLv2 server. (CVE-2006-4343)
2495 [Tavis Ormandy and Will Drewry, Google Security Team]
2497 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
2498 match only those. Before that, "AES256-SHA" would be interpreted
2499 as a pattern and match "AES128-SHA" too (since AES128-SHA got
2500 the same strength classification in 0.9.7h) as we currently only
2501 have a single AES bit in the ciphersuite description bitmap.
2502 That change, however, also applied to ciphersuite strings such as
2503 "RC4-MD5" that intentionally matched multiple ciphersuites --
2504 namely, SSL 2.0 ciphersuites in addition to the more common ones
2505 from SSL 3.0/TLS 1.0.
2507 So we change the selection algorithm again: Naming an explicit
2508 ciphersuite selects this one ciphersuite, and any other similar
2509 ciphersuite (same bitmap) from *other* protocol versions.
2510 Thus, "RC4-MD5" again will properly select both the SSL 2.0
2511 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
2513 Since SSL 2.0 does not have any ciphersuites for which the
2514 128/256 bit distinction would be relevant, this works for now.
2515 The proper fix will be to use different bits for AES128 and
2516 AES256, which would have avoided the problems from the beginning;
2517 however, bits are scarce, so we can only do this in a new release
2518 (not just a patchlevel) when we can change the SSL_CIPHER
2519 definition to split the single 'unsigned long mask' bitmap into
2520 multiple values to extend the available space.
2524 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
2526 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2527 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2529 *) Add AES IGE and biIGE modes.
2532 *) Change the Unix randomness entropy gathering to use poll() when
2533 possible instead of select(), since the latter has some
2534 undesirable limitations.
2535 [Darryl Miles via Richard Levitte and Bodo Moeller]
2537 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
2538 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
2539 cannot be implicitly activated as part of, e.g., the "AES" alias.
2540 However, please upgrade to OpenSSL 0.9.9[-dev] for
2541 non-experimental use of the ECC ciphersuites to get TLS extension
2542 support, which is required for curve and point format negotiation
2543 to avoid potential handshake problems.
2546 *) Disable rogue ciphersuites:
2548 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
2549 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
2550 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
2552 The latter two were purportedly from
2553 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
2556 Also deactivate the remaining ciphersuites from
2557 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
2558 unofficial, and the ID has long expired.
2561 *) Fix RSA blinding Heisenbug (problems sometimes occured on
2562 dual-core machines) and other potential thread-safety issues.
2565 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
2566 versions), which is now available for royalty-free use
2567 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
2568 Also, add Camellia TLS ciphersuites from RFC 4132.
2570 To minimize changes between patchlevels in the OpenSSL 0.9.8
2571 series, Camellia remains excluded from compilation unless OpenSSL
2572 is configured with 'enable-camellia'.
2575 *) Disable the padding bug check when compression is in use. The padding
2576 bug check assumes the first packet is of even length, this is not
2577 necessarily true if compresssion is enabled and can result in false
2578 positives causing handshake failure. The actual bug test is ancient
2579 code so it is hoped that implementations will either have fixed it by
2580 now or any which still have the bug do not support compression.
2583 Changes between 0.9.8a and 0.9.8b [04 May 2006]
2585 *) When applying a cipher rule check to see if string match is an explicit
2586 cipher suite and only match that one cipher suite if it is.
2589 *) Link in manifests for VC++ if needed.
2590 [Austin Ziegler <halostatue@gmail.com>]
2592 *) Update support for ECC-based TLS ciphersuites according to
2593 draft-ietf-tls-ecc-12.txt with proposed changes (but without
2594 TLS extensions, which are supported starting with the 0.9.9
2595 branch, not in the OpenSSL 0.9.8 branch).
2598 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
2599 opaque EVP_CIPHER_CTX handling.
2602 *) Fixes and enhancements to zlib compression code. We now only use
2603 "zlib1.dll" and use the default __cdecl calling convention on Win32
2604 to conform with the standards mentioned here:
2605 http://www.zlib.net/DLL_FAQ.txt
2606 Static zlib linking now works on Windows and the new --with-zlib-include
2607 --with-zlib-lib options to Configure can be used to supply the location
2608 of the headers and library. Gracefully handle case where zlib library
2612 *) Several fixes and enhancements to the OID generation code. The old code
2613 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
2614 handle numbers larger than ULONG_MAX, truncated printing and had a
2615 non standard OBJ_obj2txt() behaviour.
2618 *) Add support for building of engines under engine/ as shared libraries
2619 under VC++ build system.
2622 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
2623 Hopefully, we will not see any false combination of paths any more.
2626 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
2628 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2629 (part of SSL_OP_ALL). This option used to disable the
2630 countermeasure against man-in-the-middle protocol-version
2631 rollback in the SSL 2.0 server implementation, which is a bad
2632 idea. (CVE-2005-2969)
2634 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2635 for Information Security, National Institute of Advanced Industrial
2636 Science and Technology [AIST], Japan)]
2638 *) Add two function to clear and return the verify parameter flags.
2641 *) Keep cipherlists sorted in the source instead of sorting them at
2642 runtime, thus removing the need for a lock.
2645 *) Avoid some small subgroup attacks in Diffie-Hellman.
2646 [Nick Mathewson and Ben Laurie]
2648 *) Add functions for well-known primes.
2651 *) Extended Windows CE support.
2652 [Satoshi Nakamura and Andy Polyakov]
2654 *) Initialize SSL_METHOD structures at compile time instead of during
2655 runtime, thus removing the need for a lock.
2658 *) Make PKCS7_decrypt() work even if no certificate is supplied by
2659 attempting to decrypt each encrypted key in turn. Add support to
2663 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
2665 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
2668 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
2671 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
2672 key into the same file any more.
2675 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
2678 *) Add -utf8 command line and config file option to 'ca'.
2679 [Stefan <stf@udoma.org]
2681 *) Removed the macro des_crypt(), as it seems to conflict with some
2682 libraries. Use DES_crypt().
2685 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
2686 involves renaming the source and generated shared-libs for
2687 both. The engines will accept the corrected or legacy ids
2688 ('ncipher' and '4758_cca' respectively) when binding. NB,
2689 this only applies when building 'shared'.
2690 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
2692 *) Add attribute functions to EVP_PKEY structure. Modify
2693 PKCS12_create() to recognize a CSP name attribute and
2694 use it. Make -CSP option work again in pkcs12 utility.
2697 *) Add new functionality to the bn blinding code:
2698 - automatic re-creation of the BN_BLINDING parameters after
2699 a fixed number of uses (currently 32)
2700 - add new function for parameter creation
2701 - introduce flags to control the update behaviour of the
2702 BN_BLINDING parameters
2703 - hide BN_BLINDING structure
2704 Add a second BN_BLINDING slot to the RSA structure to improve
2705 performance when a single RSA object is shared among several
2709 *) Add support for DTLS.
2710 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
2712 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
2713 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
2716 *) Remove buggy and incompletet DH cert support from
2717 ssl/ssl_rsa.c and ssl/s3_both.c
2720 *) Use SHA-1 instead of MD5 as the default digest algorithm for
2721 the apps/openssl applications.
2724 *) Compile clean with "-Wall -Wmissing-prototypes
2725 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
2726 DEBUG_SAFESTACK must also be set.
2729 *) Change ./Configure so that certain algorithms can be disabled by default.
2730 The new counterpiece to "no-xxx" is "enable-xxx".
2732 The patented RC5 and MDC2 algorithms will now be disabled unless
2733 "enable-rc5" and "enable-mdc2", respectively, are specified.
2735 (IDEA remains enabled despite being patented. This is because IDEA
2736 is frequently required for interoperability, and there is no license
2737 fee for non-commercial use. As before, "no-idea" can be used to
2738 avoid this algorithm.)
2742 *) Add processing of proxy certificates (see RFC 3820). This work was
2743 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
2744 EGEE (Enabling Grids for E-science in Europe).
2747 *) RC4 performance overhaul on modern architectures/implementations, such
2748 as Intel P4, IA-64 and AMD64.
2751 *) New utility extract-section.pl. This can be used specify an alternative
2752 section number in a pod file instead of having to treat each file as
2753 a separate case in Makefile. This can be done by adding two lines to the
2756 =for comment openssl_section:XXX
2758 The blank line is mandatory.
2762 *) New arguments -certform, -keyform and -pass for s_client and s_server
2763 to allow alternative format key and certificate files and passphrase
2767 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
2768 update associated structures and add various utility functions.
2770 Add new policy related verify parameters, include policy checking in
2771 standard verify code. Enhance 'smime' application with extra parameters
2772 to support policy checking and print out.
2775 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
2776 Nehemiah processors. These extensions support AES encryption in hardware
2777 as well as RNG (though RNG support is currently disabled).
2778 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
2780 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
2783 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
2784 [Andy Polyakov and a number of other people]
2786 *) Improved PowerPC platform support. Most notably BIGNUM assembler
2787 implementation contributed by IBM.
2788 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
2790 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
2791 exponent rather than 'unsigned long'. There is a corresponding change to
2792 the new 'rsa_keygen' element of the RSA_METHOD structure.
2793 [Jelte Jansen, Geoff Thorpe]
2795 *) Functionality for creating the initial serial number file is now
2796 moved from CA.pl to the 'ca' utility with a new option -create_serial.
2798 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
2799 number file to 1, which is bound to cause problems. To avoid
2800 the problems while respecting compatibility between different 0.9.7
2801 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
2802 CA.pl for serial number initialization. With the new release 0.9.8,
2803 we can fix the problem directly in the 'ca' utility.)
2806 *) Reduced header interdepencies by declaring more opaque objects in
2807 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
2808 give fewer recursive includes, which could break lazy source code - so
2809 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
2810 developers should define this symbol when building and using openssl to
2811 ensure they track the recommended behaviour, interfaces, [etc], but
2812 backwards-compatible behaviour prevails when this isn't defined.
2815 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
2818 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
2819 This will generate a random key of the appropriate length based on the
2820 cipher context. The EVP_CIPHER can provide its own random key generation
2821 routine to support keys of a specific form. This is used in the des and
2822 3des routines to generate a key of the correct parity. Update S/MIME
2823 code to use new functions and hence generate correct parity DES keys.
2824 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
2825 valid (weak or incorrect parity).
2828 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
2829 as looking them up. This is useful when the verified structure may contain
2830 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
2831 present unless the new PKCS7_NO_CRL flag is asserted.
2834 *) Extend ASN1 oid configuration module. It now additionally accepts the
2837 shortName = some long name, 1.2.3.4
2840 *) Reimplemented the BN_CTX implementation. There is now no more static
2841 limitation on the number of variables it can handle nor the depth of the
2842 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
2843 information can now expand as required, and rather than having a single
2844 static array of bignums, BN_CTX now uses a linked-list of such arrays
2845 allowing it to expand on demand whilst maintaining the usefulness of
2846 BN_CTX's "bundling".
2849 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
2850 to allow all RSA operations to function using a single BN_CTX.
2853 *) Preliminary support for certificate policy evaluation and checking. This
2854 is initially intended to pass the tests outlined in "Conformance Testing
2855 of Relying Party Client Certificate Path Processing Logic" v1.07.
2858 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
2859 remained unused and not that useful. A variety of other little bignum
2860 tweaks and fixes have also been made continuing on from the audit (see
2864 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
2865 associated ASN1, EVP and SSL functions and old ASN1 macros.
2868 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
2869 and this should never fail. So the return value from the use of
2870 BN_set_word() (which can fail due to needless expansion) is now deprecated;
2871 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
2874 *) BN_CTX_get() should return zero-valued bignums, providing the same
2875 initialised value as BN_new().
2876 [Geoff Thorpe, suggested by Ulf Möller]
2878 *) Support for inhibitAnyPolicy certificate extension.
2881 *) An audit of the BIGNUM code is underway, for which debugging code is
2882 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2883 is considered valid when processing BIGNUMs, and causes execution to
2884 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2885 further steps are taken to deliberately pollute unused data in BIGNUM
2886 structures to try and expose faulty code further on. For now, openssl will
2887 (in its default mode of operation) continue to tolerate the inconsistent
2888 forms that it has tolerated in the past, but authors and packagers should
2889 consider trying openssl and their own applications when compiled with
2890 these debugging symbols defined. It will help highlight potential bugs in
2891 their own code, and will improve the test coverage for OpenSSL itself. At
2892 some point, these tighter rules will become openssl's default to improve
2893 maintainability, though the assert()s and other overheads will remain only
2894 in debugging configurations. See bn.h for more details.
2895 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2897 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2898 that can only be obtained through BN_CTX_new() (which implicitly
2899 initialises it). The presence of this function only made it possible
2900 to overwrite an existing structure (and cause memory leaks).
2903 *) Because of the callback-based approach for implementing LHASH as a
2904 template type, lh_insert() adds opaque objects to hash-tables and
2905 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2906 to clean up those corresponding objects before destroying the hash table
2907 (and losing the object pointers). So some over-zealous constifications in
2908 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2909 objects as "const" and the lh_doall[_arg] callback wrappers are not
2910 prototyped to have "const" restrictions on the object pointers they are
2911 given (and so aren't required to cast them away any more).
2914 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2915 (speed) prefers to use its own implementation. The two implementations
2916 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2917 its object type properly exposed (MS_TM) instead of casting to/from "char
2918 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2919 aren't necessarily the greatest nomenclatures - but this is what was used
2920 internally to the implementation so I've used that for now.
2923 *) Ensure that deprecated functions do not get compiled when
2924 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2925 the self-tests were still using deprecated key-generation functions so
2926 these have been updated also.
2929 *) Reorganise PKCS#7 code to separate the digest location functionality
2930 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2931 New function PKCS7_set_digest() to set the digest type for PKCS#7
2932 digestedData type. Add additional code to correctly generate the
2933 digestedData type and add support for this type in PKCS7 initialization
2937 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2938 structure of type "other".
2941 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2942 sure the loop does correctly stop and breaking ("division by zero")
2943 modulus operations are not performed. The (pre-generated) prime
2944 table crypto/bn/bn_prime.h was already correct, but it could not be
2945 re-generated on some platforms because of the "division by zero"
2946 situation in the script.
2947 [Ralf S. Engelschall]
2949 *) Update support for ECC-based TLS ciphersuites according to
2950 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2951 SHA-1 now is only used for "small" curves (where the
2952 representation of a field element takes up to 24 bytes); for
2953 larger curves, the field element resulting from ECDH is directly
2954 used as premaster secret.
2955 [Douglas Stebila (Sun Microsystems Laboratories)]
2957 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2958 curve secp160r1 to the tests.
2959 [Douglas Stebila (Sun Microsystems Laboratories)]
2961 *) Add the possibility to load symbols globally with DSO.
2962 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
2964 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
2965 control of the error stack.
2968 *) Add support for STORE in ENGINE.
2971 *) Add the STORE type. The intention is to provide a common interface
2972 to certificate and key stores, be they simple file-based stores, or
2973 HSM-type store, or LDAP stores, or...
2974 NOTE: The code is currently UNTESTED and isn't really used anywhere.
2977 *) Add a generic structure called OPENSSL_ITEM. This can be used to
2978 pass a list of arguments to any function as well as provide a way
2979 for a function to pass data back to the caller.
2982 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
2983 works like BUF_strdup() but can be used to duplicate a portion of
2984 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
2988 *) Add the function sk_find_ex() which works like sk_find(), but will
2989 return an index to an element even if an exact match couldn't be
2990 found. The index is guaranteed to point at the element where the
2991 searched-for key would be inserted to preserve sorting order.
2994 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
2995 takes an extra flags argument for optional functionality. Currently,
2996 the following flags are defined:
2998 OBJ_BSEARCH_VALUE_ON_NOMATCH
2999 This one gets OBJ_bsearch_ex() to return a pointer to the first
3000 element where the comparing function returns a negative or zero
3003 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
3004 This one gets OBJ_bsearch_ex() to return a pointer to the first
3005 element where the comparing function returns zero. This is useful
3006 if there are more than one element where the comparing function
3010 *) Make it possible to create self-signed certificates with 'openssl ca'
3011 in such a way that the self-signed certificate becomes part of the
3012 CA database and uses the same mechanisms for serial number generation
3013 as all other certificate signing. The new flag '-selfsign' enables
3014 this functionality. Adapt CA.sh and CA.pl.in.
3017 *) Add functionality to check the public key of a certificate request
3018 against a given private. This is useful to check that a certificate
3019 request can be signed by that key (self-signing).
3022 *) Make it possible to have multiple active certificates with the same
3023 subject in the CA index file. This is done only if the keyword
3024 'unique_subject' is set to 'no' in the main CA section (default
3025 if 'CA_default') of the configuration file. The value is saved
3026 with the database itself in a separate index attribute file,
3027 named like the index file with '.attr' appended to the name.
3030 *) Generate muti valued AVAs using '+' notation in config files for
3034 *) Support for nameConstraints certificate extension.
3037 *) Support for policyConstraints certificate extension.
3040 *) Support for policyMappings certificate extension.
3043 *) Make sure the default DSA_METHOD implementation only uses its
3044 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
3045 and change its own handlers to be NULL so as to remove unnecessary
3046 indirection. This lets alternative implementations fallback to the
3047 default implementation more easily.
3050 *) Support for directoryName in GeneralName related extensions
3054 *) Make it possible to link applications using Makefile.shared.
3055 Make that possible even when linking against static libraries!
3058 *) Support for single pass processing for S/MIME signing. This now
3059 means that S/MIME signing can be done from a pipe, in addition
3060 cleartext signing (multipart/signed type) is effectively streaming
3061 and the signed data does not need to be all held in memory.
3063 This is done with a new flag PKCS7_STREAM. When this flag is set
3064 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
3065 is done after the data is output (and digests calculated) in
3066 SMIME_write_PKCS7().
3069 *) Add full support for -rpath/-R, both in shared libraries and
3070 applications, at least on the platforms where it's known how
3074 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
3075 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
3076 will now compute a table of multiples of the generator that
3077 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
3078 faster (notably in the case of a single point multiplication,
3079 scalar * generator).
3080 [Nils Larsch, Bodo Moeller]
3082 *) IPv6 support for certificate extensions. The various extensions
3083 which use the IP:a.b.c.d can now take IPv6 addresses using the
3084 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
3088 *) Added an ENGINE that implements RSA by performing private key
3089 exponentiations with the GMP library. The conversions to and from
3090 GMP's mpz_t format aren't optimised nor are any montgomery forms
3091 cached, and on x86 it appears OpenSSL's own performance has caught up.
3092 However there are likely to be other architectures where GMP could
3093 provide a boost. This ENGINE is not built in by default, but it can be
3094 specified at Configure time and should be accompanied by the necessary
3095 linker additions, eg;
3096 ./config -DOPENSSL_USE_GMP -lgmp
3099 *) "openssl engine" will not display ENGINE/DSO load failure errors when
3100 testing availability of engines with "-t" - the old behaviour is
3101 produced by increasing the feature's verbosity with "-tt".
3104 *) ECDSA routines: under certain error conditions uninitialized BN objects
3105 could be freed. Solution: make sure initialization is performed early
3106 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
3110 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
3111 and DH_METHOD (eg. by ENGINE implementations) to override the normal
3112 software implementations. For DSA and DH, parameter generation can
3113 also be overriden by providing the appropriate method callbacks.
3116 *) Change the "progress" mechanism used in key-generation and
3117 primality testing to functions that take a new BN_GENCB pointer in
3118 place of callback/argument pairs. The new API functions have "_ex"
3119 postfixes and the older functions are reimplemented as wrappers for
3120 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
3121 declarations of the old functions to help (graceful) attempts to
3122 migrate to the new functions. Also, the new key-generation API
3123 functions operate on a caller-supplied key-structure and return
3124 success/failure rather than returning a key or NULL - this is to
3125 help make "keygen" another member function of RSA_METHOD etc.
3127 Example for using the new callback interface:
3129 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
3133 BN_GENCB_set(&my_cb, my_callback, my_arg);
3135 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
3136 /* For the meaning of a, b in calls to my_callback(), see the
3137 * documentation of the function that calls the callback.
3138 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
3139 * my_callback should return 1 if it wants BN_is_prime_ex()
3140 * to continue, or 0 to stop.
3145 *) Change the ZLIB compression method to be stateful, and make it
3146 available to TLS with the number defined in
3147 draft-ietf-tls-compression-04.txt.
3150 *) Add the ASN.1 structures and functions for CertificatePair, which
3151 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
3153 CertificatePair ::= SEQUENCE {
3154 forward [0] Certificate OPTIONAL,
3155 reverse [1] Certificate OPTIONAL,
3156 -- at least one of the pair shall be present -- }
3158 Also implement the PEM functions to read and write certificate
3159 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
3161 This needed to be defined, mostly for the sake of the LDAP
3162 attribute crossCertificatePair, but may prove useful elsewhere as
3166 *) Make it possible to inhibit symlinking of shared libraries in
3167 Makefile.shared, for Cygwin's sake.
3170 *) Extend the BIGNUM API by creating a function
3171 void BN_set_negative(BIGNUM *a, int neg);
3172 and a macro that behave like
3173 int BN_is_negative(const BIGNUM *a);
3175 to avoid the need to access 'a->neg' directly in applications.
3178 *) Implement fast modular reduction for pseudo-Mersenne primes
3179 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
3180 EC_GROUP_new_curve_GFp() will now automatically use this
3182 [Nils Larsch <nla@trustcenter.de>]
3184 *) Add new lock type (CRYPTO_LOCK_BN).
3187 *) Change the ENGINE framework to automatically load engines
3188 dynamically from specific directories unless they could be
3189 found to already be built in or loaded. Move all the
3190 current engines except for the cryptodev one to a new
3192 The engines in engines/ are built as shared libraries if
3193 the "shared" options was given to ./Configure or ./config.
3194 Otherwise, they are inserted in libcrypto.a.
3195 /usr/local/ssl/engines is the default directory for dynamic
3196 engines, but that can be overriden at configure time through
3197 the usual use of --prefix and/or --openssldir, and at run
3198 time with the environment variable OPENSSL_ENGINES.
3199 [Geoff Thorpe and Richard Levitte]
3201 *) Add Makefile.shared, a helper makefile to build shared
3202 libraries. Addapt Makefile.org.
3205 *) Add version info to Win32 DLLs.
3206 [Peter 'Luna' Runestig" <peter@runestig.com>]
3208 *) Add new 'medium level' PKCS#12 API. Certificates and keys
3209 can be added using this API to created arbitrary PKCS#12
3210 files while avoiding the low level API.
3212 New options to PKCS12_create(), key or cert can be NULL and
3213 will then be omitted from the output file. The encryption
3214 algorithm NIDs can be set to -1 for no encryption, the mac
3215 iteration count can be set to 0 to omit the mac.
3217 Enhance pkcs12 utility by making the -nokeys and -nocerts
3218 options work when creating a PKCS#12 file. New option -nomac
3219 to omit the mac, NONE can be set for an encryption algorithm.
3220 New code is modified to use the enhanced PKCS12_create()
3221 instead of the low level API.
3224 *) Extend ASN1 encoder to support indefinite length constructed
3225 encoding. This can output sequences tags and octet strings in
3226 this form. Modify pk7_asn1.c to support indefinite length
3227 encoding. This is experimental and needs additional code to
3228 be useful, such as an ASN1 bio and some enhanced streaming
3231 Extend template encode functionality so that tagging is passed
3232 down to the template encoder.
3235 *) Let 'openssl req' fail if an argument to '-newkey' is not
3236 recognized instead of using RSA as a default.
3239 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
3240 As these are not official, they are not included in "ALL";
3241 the "ECCdraft" ciphersuite group alias can be used to select them.
3242 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
3244 *) Add ECDH engine support.
3245 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
3247 *) Add ECDH in new directory crypto/ecdh/.
3248 [Douglas Stebila (Sun Microsystems Laboratories)]
3250 *) Let BN_rand_range() abort with an error after 100 iterations
3251 without success (which indicates a broken PRNG).
3254 *) Change BN_mod_sqrt() so that it verifies that the input value
3255 is really the square of the return value. (Previously,
3256 BN_mod_sqrt would show GIGO behaviour.)
3259 *) Add named elliptic curves over binary fields from X9.62, SECG,
3260 and WAP/WTLS; add OIDs that were still missing.
3262 [Sheueling Chang Shantz and Douglas Stebila
3263 (Sun Microsystems Laboratories)]
3265 *) Extend the EC library for elliptic curves over binary fields
3266 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
3269 EC_GF2m_simple_method
3273 EC_GROUP_new_curve_GF2m
3274 EC_GROUP_set_curve_GF2m
3275 EC_GROUP_get_curve_GF2m
3276 EC_POINT_set_affine_coordinates_GF2m
3277 EC_POINT_get_affine_coordinates_GF2m
3278 EC_POINT_set_compressed_coordinates_GF2m
3280 Point compression for binary fields is disabled by default for
3281 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
3284 As binary polynomials are represented as BIGNUMs, various members
3285 of the EC_GROUP and EC_POINT data structures can be shared
3286 between the implementations for prime fields and binary fields;
3287 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
3288 are essentially identical to their ..._GFp counterparts.
3289 (For simplicity, the '..._GFp' prefix has been dropped from
3290 various internal method names.)
3292 An internal 'field_div' method (similar to 'field_mul' and
3293 'field_sqr') has been added; this is used only for binary fields.
3295 [Sheueling Chang Shantz and Douglas Stebila
3296 (Sun Microsystems Laboratories)]
3298 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
3299 through methods ('mul', 'precompute_mult').
3301 The generic implementations (now internally called 'ec_wNAF_mul'
3302 and 'ec_wNAF_precomputed_mult') remain the default if these
3303 methods are undefined.
3305 [Sheueling Chang Shantz and Douglas Stebila
3306 (Sun Microsystems Laboratories)]
3308 *) New function EC_GROUP_get_degree, which is defined through
3309 EC_METHOD. For curves over prime fields, this returns the bit
3310 length of the modulus.
3312 [Sheueling Chang Shantz and Douglas Stebila
3313 (Sun Microsystems Laboratories)]
3315 *) New functions EC_GROUP_dup, EC_POINT_dup.
3316 (These simply call ..._new and ..._copy).
3318 [Sheueling Chang Shantz and Douglas Stebila
3319 (Sun Microsystems Laboratories)]
3321 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
3322 Polynomials are represented as BIGNUMs (where the sign bit is not
3323 used) in the following functions [macros]:
3326 BN_GF2m_sub [= BN_GF2m_add]
3327 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
3328 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
3329 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
3331 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
3332 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
3333 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
3334 BN_GF2m_cmp [= BN_ucmp]
3336 (Note that only the 'mod' functions are actually for fields GF(2^m).
3337 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
3339 For some functions, an the irreducible polynomial defining a
3340 field can be given as an 'unsigned int[]' with strictly
3341 decreasing elements giving the indices of those bits that are set;
3342 i.e., p[] represents the polynomial
3343 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
3345 p[0] > p[1] > ... > p[k] = 0.
3346 This applies to the following functions:
3351 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
3352 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
3354 BN_GF2m_mod_sqrt_arr
3355 BN_GF2m_mod_solve_quad_arr
3359 Conversion can be performed by the following functions:
3364 bntest.c has additional tests for binary polynomial arithmetic.
3366 Two implementations for BN_GF2m_mod_div() are available.
3367 The default algorithm simply uses BN_GF2m_mod_inv() and
3368 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
3369 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
3370 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
3372 [Sheueling Chang Shantz and Douglas Stebila
3373 (Sun Microsystems Laboratories)]
3375 *) Add new error code 'ERR_R_DISABLED' that can be used when some
3376 functionality is disabled at compile-time.
3377 [Douglas Stebila <douglas.stebila@sun.com>]
3379 *) Change default behaviour of 'openssl asn1parse' so that more
3380 information is visible when viewing, e.g., a certificate:
3382 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
3383 mode the content of non-printable OCTET STRINGs is output in a
3384 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
3385 avoid the appearance of a printable string.
3386 [Nils Larsch <nla@trustcenter.de>]
3388 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
3390 EC_GROUP_set_asn1_flag()
3391 EC_GROUP_get_asn1_flag()
3392 EC_GROUP_set_point_conversion_form()
3393 EC_GROUP_get_point_conversion_form()
3394 These control ASN1 encoding details:
3395 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
3396 has been set to OPENSSL_EC_NAMED_CURVE.
3397 - Points are encoded in uncompressed form by default; options for
3398 asn1_for are as for point2oct, namely
3399 POINT_CONVERSION_COMPRESSED
3400 POINT_CONVERSION_UNCOMPRESSED
3401 POINT_CONVERSION_HYBRID
3403 Also add 'seed' and 'seed_len' members to EC_GROUP with access
3406 EC_GROUP_get0_seed()
3407 EC_GROUP_get_seed_len()
3408 This is used only for ASN1 purposes (so far).
3409 [Nils Larsch <nla@trustcenter.de>]
3411 *) Add 'field_type' member to EC_METHOD, which holds the NID
3412 of the appropriate field type OID. The new function
3413 EC_METHOD_get_field_type() returns this value.
3414 [Nils Larsch <nla@trustcenter.de>]
3419 EC_POINT_point2hex()
3420 EC_POINT_hex2point()
3421 providing useful interfaces to EC_POINT_point2oct() and
3422 EC_POINT_oct2point().
3423 [Nils Larsch <nla@trustcenter.de>]
3425 *) Change internals of the EC library so that the functions
3426 EC_GROUP_set_generator()
3427 EC_GROUP_get_generator()
3428 EC_GROUP_get_order()
3429 EC_GROUP_get_cofactor()
3430 are implemented directly in crypto/ec/ec_lib.c and not dispatched
3431 to methods, which would lead to unnecessary code duplication when
3432 adding different types of curves.
3433 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
3435 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
3436 arithmetic, and such that modified wNAFs are generated
3437 (which avoid length expansion in many cases).
3440 *) Add a function EC_GROUP_check_discriminant() (defined via
3441 EC_METHOD) that verifies that the curve discriminant is non-zero.
3443 Add a function EC_GROUP_check() that makes some sanity tests
3444 on a EC_GROUP, its generator and order. This includes
3445 EC_GROUP_check_discriminant().
3446 [Nils Larsch <nla@trustcenter.de>]
3448 *) Add ECDSA in new directory crypto/ecdsa/.
3450 Add applications 'openssl ecparam' and 'openssl ecdsa'
3451 (these are based on 'openssl dsaparam' and 'openssl dsa').
3453 ECDSA support is also included in various other files across the
3454 library. Most notably,
3455 - 'openssl req' now has a '-newkey ecdsa:file' option;
3456 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
3457 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
3458 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
3459 them suitable for ECDSA where domain parameters must be
3460 extracted before the specific public key;
3461 - ECDSA engine support has been added.
3462 [Nils Larsch <nla@trustcenter.de>]
3464 *) Include some named elliptic curves, and add OIDs from X9.62,
3465 SECG, and WAP/WTLS. Each curve can be obtained from the new
3467 EC_GROUP_new_by_curve_name(),
3468 and the list of available named curves can be obtained with
3469 EC_get_builtin_curves().
3470 Also add a 'curve_name' member to EC_GROUP objects, which can be
3472 EC_GROUP_set_curve_name()
3473 EC_GROUP_get_curve_name()
3474 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
3476 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
3477 was actually never needed) and in BN_mul(). The removal in BN_mul()
3478 required a small change in bn_mul_part_recursive() and the addition
3479 of the functions bn_cmp_part_words(), bn_sub_part_words() and
3480 bn_add_part_words(), which do the same thing as bn_cmp_words(),
3481 bn_sub_words() and bn_add_words() except they take arrays with
3485 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
3487 *) Cleanse PEM buffers before freeing them since they may contain
3489 [Benjamin Bennett <ben@psc.edu>]
3491 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3492 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3493 authentication-only ciphersuites.
3496 *) Since AES128 and AES256 share a single mask bit in the logic of
3497 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3498 kludge to work properly if AES128 is available and AES256 isn't.
3501 *) Expand security boundary to match 1.1.1 module.
3504 *) Remove redundant features: hash file source, editing of test vectors
3505 modify fipsld to use external fips_premain.c signature.
3508 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
3509 run algorithm test programs.
3512 *) Make algorithm test programs more tolerant of whitespace.
3515 *) Have SSL/TLS server implementation tolerate "mismatched" record
3516 protocol version while receiving ClientHello even if the
3517 ClientHello is fragmented. (The server can't insist on the
3518 particular protocol version it has chosen before the ServerHello
3519 message has informed the client about his choice.)
3522 *) Load error codes if they are not already present instead of using a
3523 static variable. This allows them to be cleanly unloaded and reloaded.
3526 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
3528 *) Introduce limits to prevent malicious keys being able to
3529 cause a denial of service. (CVE-2006-2940)
3530 [Steve Henson, Bodo Moeller]
3532 *) Fix ASN.1 parsing of certain invalid structures that can result
3533 in a denial of service. (CVE-2006-2937) [Steve Henson]
3535 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3536 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3538 *) Fix SSL client code which could crash if connecting to a
3539 malicious SSLv2 server. (CVE-2006-4343)
3540 [Tavis Ormandy and Will Drewry, Google Security Team]
3542 *) Change ciphersuite string processing so that an explicit
3543 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
3544 will no longer include "AES128-SHA"), and any other similar
3545 ciphersuite (same bitmap) from *other* protocol versions (so that
3546 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
3547 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
3548 changes from 0.9.8b and 0.9.8d.
3551 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
3553 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3554 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3556 *) Change the Unix randomness entropy gathering to use poll() when
3557 possible instead of select(), since the latter has some
3558 undesirable limitations.
3559 [Darryl Miles via Richard Levitte and Bodo Moeller]
3561 *) Disable rogue ciphersuites:
3563 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3564 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3565 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3567 The latter two were purportedly from
3568 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3571 Also deactive the remaining ciphersuites from
3572 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3573 unofficial, and the ID has long expired.
3576 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3577 dual-core machines) and other potential thread-safety issues.
3580 Changes between 0.9.7i and 0.9.7j [04 May 2006]
3582 *) Adapt fipsld and the build system to link against the validated FIPS
3583 module in FIPS mode.
3586 *) Fixes for VC++ 2005 build under Windows.
3589 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
3590 from a Windows bash shell such as MSYS. It is autodetected from the
3591 "config" script when run from a VC++ environment. Modify standard VC++
3592 build to use fipscanister.o from the GNU make build.
3595 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
3597 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
3598 The value now differs depending on if you build for FIPS or not.
3599 BEWARE! A program linked with a shared FIPSed libcrypto can't be
3600 safely run with a non-FIPSed libcrypto, as it may crash because of
3601 the difference induced by this change.
3604 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
3606 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3607 (part of SSL_OP_ALL). This option used to disable the
3608 countermeasure against man-in-the-middle protocol-version
3609 rollback in the SSL 2.0 server implementation, which is a bad
3610 idea. (CVE-2005-2969)
3612 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3613 for Information Security, National Institute of Advanced Industrial
3614 Science and Technology [AIST], Japan)]
3616 *) Minimal support for X9.31 signatures and PSS padding modes. This is
3617 mainly for FIPS compliance and not fully integrated at this stage.
3620 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
3621 the exponentiation using a fixed-length exponent. (Otherwise,
3622 the information leaked through timing could expose the secret key
3623 after many signatures; cf. Bleichenbacher's attack on DSA with
3627 *) Make a new fixed-window mod_exp implementation the default for
3628 RSA, DSA, and DH private-key operations so that the sequence of
3629 squares and multiplies and the memory access pattern are
3630 independent of the particular secret key. This will mitigate
3631 cache-timing and potential related attacks.
3633 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
3634 and this is automatically used by BN_mod_exp_mont() if the new flag
3635 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
3636 will use this BN flag for private exponents unless the flag
3637 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
3638 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
3640 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
3642 *) Change the client implementation for SSLv23_method() and
3643 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
3644 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
3645 (Previously, the SSL 2.0 backwards compatible Client Hello
3646 message format would be used even with SSL_OP_NO_SSLv2.)
3649 *) Add support for smime-type MIME parameter in S/MIME messages which some
3653 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
3654 a threadsafe manner. Modify rsa code to use new function and add calls
3655 to dsa and dh code (which had race conditions before).
3658 *) Include the fixed error library code in the C error file definitions
3659 instead of fixing them up at runtime. This keeps the error code
3660 structures constant.
3663 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
3665 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
3668 *) Fixes for newer kerberos headers. NB: the casts are needed because
3669 the 'length' field is signed on one version and unsigned on another
3670 with no (?) obvious way to tell the difference, without these VC++
3671 complains. Also the "definition" of FAR (blank) is no longer included
3672 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
3673 some needed definitions.
3676 *) Undo Cygwin change.
3679 *) Added support for proxy certificates according to RFC 3820.
3680 Because they may be a security thread to unaware applications,
3681 they must be explicitely allowed in run-time. See
3682 docs/HOWTO/proxy_certificates.txt for further information.
3685 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
3687 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
3688 server and client random values. Previously
3689 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
3690 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
3692 This change has negligible security impact because:
3694 1. Server and client random values still have 24 bytes of pseudo random
3697 2. Server and client random values are sent in the clear in the initial
3700 3. The master secret is derived using the premaster secret (48 bytes in
3701 size for static RSA ciphersuites) as well as client server and random
3704 The OpenSSL team would like to thank the UK NISCC for bringing this issue
3707 [Stephen Henson, reported by UK NISCC]
3709 *) Use Windows randomness collection on Cygwin.
3712 *) Fix hang in EGD/PRNGD query when communication socket is closed
3713 prematurely by EGD/PRNGD.
3714 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
3716 *) Prompt for pass phrases when appropriate for PKCS12 input format.
3719 *) Back-port of selected performance improvements from development
3720 branch, as well as improved support for PowerPC platforms.
3723 *) Add lots of checks for memory allocation failure, error codes to indicate
3724 failure and freeing up memory if a failure occurs.
3725 [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
3727 *) Add new -passin argument to dgst.
3730 *) Perform some character comparisons of different types in X509_NAME_cmp:
3731 this is needed for some certificates that reencode DNs into UTF8Strings
3732 (in violation of RFC3280) and can't or wont issue name rollover
3736 *) Make an explicit check during certificate validation to see that
3737 the CA setting in each certificate on the chain is correct. As a
3738 side effect always do the following basic checks on extensions,
3739 not just when there's an associated purpose to the check:
3741 - if there is an unhandled critical extension (unless the user
3742 has chosen to ignore this fault)
3743 - if the path length has been exceeded (if one is set at all)
3744 - that certain extensions fit the associated purpose (if one has
3748 Changes between 0.9.7d and 0.9.7e [25 Oct 2004]
3750 *) Avoid a race condition when CRLs are checked in a multi threaded
3751 environment. This would happen due to the reordering of the revoked
3752 entries during signature checking and serial number lookup. Now the
3753 encoding is cached and the serial number sort performed under a lock.
3754 Add new STACK function sk_is_sorted().
3757 *) Add Delta CRL to the extension code.
3760 *) Various fixes to s3_pkt.c so alerts are sent properly.
3761 [David Holmes <d.holmes@f5.com>]
3763 *) Reduce the chances of duplicate issuer name and serial numbers (in
3764 violation of RFC3280) using the OpenSSL certificate creation utilities.
3765 This is done by creating a random 64 bit value for the initial serial
3766 number when a serial number file is created or when a self signed
3767 certificate is created using 'openssl req -x509'. The initial serial
3768 number file is created using 'openssl x509 -next_serial' in CA.pl
3769 rather than being initialized to 1.
3772 Changes between 0.9.7c and 0.9.7d [17 Mar 2004]
3774 *) Fix null-pointer assignment in do_change_cipher_spec() revealed
3775 by using the Codenomicon TLS Test Tool (CVE-2004-0079)
3776 [Joe Orton, Steve Henson]
3778 *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
3780 [Joe Orton, Steve Henson]
3782 *) Make it possible to have multiple active certificates with the same
3783 subject in the CA index file. This is done only if the keyword
3784 'unique_subject' is set to 'no' in the main CA section (default
3785 if 'CA_default') of the configuration file. The value is saved
3786 with the database itself in a separate index attribute file,
3787 named like the index file with '.attr' appended to the name.
3790 *) X509 verify fixes. Disable broken certificate workarounds when
3791 X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
3792 keyUsage extension present. Don't accept CRLs with unhandled critical
3793 extensions: since verify currently doesn't process CRL extensions this
3794 rejects a CRL with *any* critical extensions. Add new verify error codes
3798 *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
3799 A clarification of RFC2560 will require the use of OCTET STRINGs and
3800 some implementations cannot handle the current raw format. Since OpenSSL
3801 copies and compares OCSP nonces as opaque blobs without any attempt at
3802 parsing them this should not create any compatibility issues.
3805 *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
3806 calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
3807 this HMAC (and other) operations are several times slower than OpenSSL
3811 *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
3812 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3814 *) Use the correct content when signing type "other".
3817 Changes between 0.9.7b and 0.9.7c [30 Sep 2003]
3819 *) Fix various bugs revealed by running the NISCC test suite:
3821 Stop out of bounds reads in the ASN1 code when presented with
3822 invalid tags (CVE-2003-0543 and CVE-2003-0544).
3824 Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
3826 If verify callback ignores invalid public key errors don't try to check
3827 certificate signature with the NULL public key.
3831 *) New -ignore_err option in ocsp application to stop the server
3832 exiting on the first error in a request.
3835 *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
3836 if the server requested one: as stated in TLS 1.0 and SSL 3.0
3840 *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
3841 extra data after the compression methods not only for TLS 1.0
3842 but also for SSL 3.0 (as required by the specification).
3843 [Bodo Moeller; problem pointed out by Matthias Loepfe]
3845 *) Change X509_certificate_type() to mark the key as exported/exportable
3846 when it's 512 *bits* long, not 512 bytes.
3849 *) Change AES_cbc_encrypt() so it outputs exact multiple of
3850 blocks during encryption.
3853 *) Various fixes to base64 BIO and non blocking I/O. On write
3854 flushes were not handled properly if the BIO retried. On read
3855 data was not being buffered properly and had various logic bugs.
3856 This also affects blocking I/O when the data being decoded is a
3860 *) Various S/MIME bugfixes and compatibility changes:
3861 output correct application/pkcs7 MIME type if
3862 PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
3863 Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
3864 of files as .eml work). Correctly handle very long lines in MIME
3868 Changes between 0.9.7a and 0.9.7b [10 Apr 2003]
3870 *) Countermeasure against the Klima-Pokorny-Rosa extension of
3871 Bleichbacher's attack on PKCS #1 v1.5 padding: treat
3872 a protocol version number mismatch like a decryption error
3873 in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
3876 *) Turn on RSA blinding by default in the default implementation
3877 to avoid a timing attack. Applications that don't want it can call
3878 RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
3879 They would be ill-advised to do so in most cases.
3880 [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
3882 *) Change RSA blinding code so that it works when the PRNG is not
3883 seeded (in this case, the secret RSA exponent is abused as
3884 an unpredictable seed -- if it is not unpredictable, there
3885 is no point in blinding anyway). Make RSA blinding thread-safe
3886 by remembering the creator's thread ID in rsa->blinding and
3887 having all other threads use local one-time blinding factors
3888 (this requires more computation than sharing rsa->blinding, but
3889 avoids excessive locking; and if an RSA object is not shared
3890 between threads, blinding will still be very fast).
3893 *) Fixed a typo bug that would cause ENGINE_set_default() to set an
3894 ENGINE as defaults for all supported algorithms irrespective of
3895 the 'flags' parameter. 'flags' is now honoured, so applications
3896 should make sure they are passing it correctly.
3899 *) Target "mingw" now allows native Windows code to be generated in
3900 the Cygwin environment as well as with the MinGW compiler.
3903 Changes between 0.9.7 and 0.9.7a [19 Feb 2003]
3905 *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
3906 via timing by performing a MAC computation even if incorrrect
3907 block cipher padding has been found. This is a countermeasure
3908 against active attacks where the attacker has to distinguish
3909 between bad padding and a MAC verification error. (CVE-2003-0078)
3911 [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
3912 Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
3913 Martin Vuagnoux (EPFL, Ilion)]
3915 *) Make the no-err option work as intended. The intention with no-err
3916 is not to have the whole error stack handling routines removed from
3917 libcrypto, it's only intended to remove all the function name and
3918 reason texts, thereby removing some of the footprint that may not
3919 be interesting if those errors aren't displayed anyway.
3921 NOTE: it's still possible for any application or module to have it's
3922 own set of error texts inserted. The routines are there, just not
3923 used by default when no-err is given.
3926 *) Add support for FreeBSD on IA64.
3927 [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
3929 *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
3930 Kerberos function mit_des_cbc_cksum(). Before this change,
3931 the value returned by DES_cbc_cksum() was like the one from
3932 mit_des_cbc_cksum(), except the bytes were swapped.
3933 [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
3935 *) Allow an application to disable the automatic SSL chain building.
3936 Before this a rather primitive chain build was always performed in
3937 ssl3_output_cert_chain(): an application had no way to send the
3938 correct chain if the automatic operation produced an incorrect result.
3940 Now the chain builder is disabled if either:
3942 1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
3944 2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
3946 The reasoning behind this is that an application would not want the
3947 auto chain building to take place if extra chain certificates are
3948 present and it might also want a means of sending no additional
3949 certificates (for example the chain has two certificates and the
3953 *) Add the possibility to build without the ENGINE framework.
3954 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3956 *) Under Win32 gmtime() can return NULL: check return value in
3957 OPENSSL_gmtime(). Add error code for case where gmtime() fails.
3960 *) DSA routines: under certain error conditions uninitialized BN objects
3961 could be freed. Solution: make sure initialization is performed early
3962 enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
3963 Nils Larsch <nla@trustcenter.de> via PR#459)
3966 *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
3967 checked on reconnect on the client side, therefore session resumption
3968 could still fail with a "ssl session id is different" error. This
3969 behaviour is masked when SSL_OP_ALL is used due to
3970 SSL_OP_MICROSOFT_SESS_ID_BUG being set.
3971 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3972 followup to PR #377.
3975 *) IA-32 assembler support enhancements: unified ELF targets, support
3976 for SCO/Caldera platforms, fix for Cygwin shared build.
3979 *) Add support for FreeBSD on sparc64. As a consequence, support for
3980 FreeBSD on non-x86 processors is separate from x86 processors on
3981 the config script, much like the NetBSD support.
3982 [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
3984 Changes between 0.9.6h and 0.9.7 [31 Dec 2002]
3986 [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
3989 *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
3990 code (06) was taken as the first octet of the session ID and the last
3991 octet was ignored consequently. As a result SSLv2 client side session
3992 caching could not have worked due to the session ID mismatch between
3994 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3998 *) Change the declaration of needed Kerberos libraries to use EX_LIBS
3999 instead of the special (and badly supported) LIBKRB5. LIBKRB5 is
4003 *) The hw_ncipher.c engine requires dynamic locks. Unfortunately, it
4004 seems that in spite of existing for more than a year, many application
4005 author have done nothing to provide the necessary callbacks, which
4006 means that this particular engine will not work properly anywhere.
4007 This is a very unfortunate situation which forces us, in the name
4008 of usability, to give the hw_ncipher.c a static lock, which is part
4010 NOTE: This is for the 0.9.7 series ONLY. This hack will never
4011 appear in 0.9.8 or later. We EXPECT application authors to have
4012 dealt properly with this when 0.9.8 is released (unless we actually
4013 make such changes in the libcrypto locking code that changes will
4014 have to be made anyway).
4017 *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
4018 octets have been read, EOF or an error occurs. Without this change
4019 some truncated ASN1 structures will not produce an error.
4022 *) Disable Heimdal support, since it hasn't been fully implemented.
4023 Still give the possibility to force the use of Heimdal, but with
4024 warnings and a request that patches get sent to openssl-dev.
4027 *) Add the VC-CE target, introduce the WINCE sysname, and add
4028 INSTALL.WCE and appropriate conditionals to make it build.
4029 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
4031 *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
4032 cygssl-x.y.z.dll, where x, y and z are the major, minor and
4033 edit numbers of the version.
4034 [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
4036 *) Introduce safe string copy and catenation functions
4037 (BUF_strlcpy() and BUF_strlcat()).
4038 [Ben Laurie (CHATS) and Richard Levitte]
4040 *) Avoid using fixed-size buffers for one-line DNs.
4041 [Ben Laurie (CHATS)]
4043 *) Add BUF_MEM_grow_clean() to avoid information leakage when
4044 resizing buffers containing secrets, and use where appropriate.
4045 [Ben Laurie (CHATS)]
4047 *) Avoid using fixed size buffers for configuration file location.
4048 [Ben Laurie (CHATS)]
4050 *) Avoid filename truncation for various CA files.
4051 [Ben Laurie (CHATS)]
4053 *) Use sizeof in preference to magic numbers.
4054 [Ben Laurie (CHATS)]
4056 *) Avoid filename truncation in cert requests.
4057 [Ben Laurie (CHATS)]
4059 *) Add assertions to check for (supposedly impossible) buffer
4061 [Ben Laurie (CHATS)]
4063 *) Don't cache truncated DNS entries in the local cache (this could
4064 potentially lead to a spoofing attack).
4065 [Ben Laurie (CHATS)]
4067 *) Fix various buffers to be large enough for hex/decimal
4068 representations in a platform independent manner.
4069 [Ben Laurie (CHATS)]
4071 *) Add CRYPTO_realloc_clean() to avoid information leakage when
4072 resizing buffers containing secrets, and use where appropriate.
4073 [Ben Laurie (CHATS)]
4075 *) Add BIO_indent() to avoid much slightly worrying code to do
4077 [Ben Laurie (CHATS)]
4079 *) Convert sprintf()/BIO_puts() to BIO_printf().
4080 [Ben Laurie (CHATS)]
4082 *) buffer_gets() could terminate with the buffer only half
4084 [Ben Laurie (CHATS)]
4086 *) Add assertions to prevent user-supplied crypto functions from
4087 overflowing internal buffers by having large block sizes, etc.
4088 [Ben Laurie (CHATS)]
4090 *) New OPENSSL_assert() macro (similar to assert(), but enabled
4092 [Ben Laurie (CHATS)]
4094 *) Eliminate unused copy of key in RC4.
4095 [Ben Laurie (CHATS)]
4097 *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
4098 [Ben Laurie (CHATS)]
4100 *) Fix off-by-one error in EGD path.
4101 [Ben Laurie (CHATS)]
4103 *) If RANDFILE path is too long, ignore instead of truncating.
4104 [Ben Laurie (CHATS)]
4106 *) Eliminate unused and incorrectly sized X.509 structure
4108 [Ben Laurie (CHATS)]
4110 *) Eliminate unused and dangerous function knumber().
4111 [Ben Laurie (CHATS)]
4113 *) Eliminate unused and dangerous structure, KSSL_ERR.
4114 [Ben Laurie (CHATS)]
4116 *) Protect against overlong session ID context length in an encoded
4117 session object. Since these are local, this does not appear to be
4119 [Ben Laurie (CHATS)]
4121 *) Change from security patch (see 0.9.6e below) that did not affect
4122 the 0.9.6 release series:
4124 Remote buffer overflow in SSL3 protocol - an attacker could
4125 supply an oversized master key in Kerberos-enabled versions.
4127 [Ben Laurie (CHATS)]
4129 *) Change the SSL kerb5 codes to match RFC 2712.
4132 *) Make -nameopt work fully for req and add -reqopt switch.
4133 [Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]
4135 *) The "block size" for block ciphers in CFB and OFB mode should be 1.
4136 [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]
4138 *) Make sure tests can be performed even if the corresponding algorithms
4139 have been removed entirely. This was also the last step to make
4140 OpenSSL compilable with DJGPP under all reasonable conditions.
4141 [Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
4143 *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
4144 to allow version independent disabling of normally unselected ciphers,
4145 which may be activated as a side-effect of selecting a single cipher.
4147 (E.g., cipher list string "RSA" enables ciphersuites that are left
4148 out of "ALL" because they do not provide symmetric encryption.
4149 "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
4150 [Lutz Jaenicke, Bodo Moeller]
4152 *) Add appropriate support for separate platform-dependent build
4153 directories. The recommended way to make a platform-dependent
4154 build directory is the following (tested on Linux), maybe with
4157 # Place yourself outside of the OpenSSL source tree. In
4158 # this example, the environment variable OPENSSL_SOURCE
4159 # is assumed to contain the absolute OpenSSL source directory.
4160 mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
4161 cd objtree/"`uname -s`-`uname -r`-`uname -m`"
4162 (cd $OPENSSL_SOURCE; find . -type f) | while read F; do
4163 mkdir -p `dirname $F`
4164 ln -s $OPENSSL_SOURCE/$F $F
4167 To be absolutely sure not to disturb the source tree, a "make clean"
4168 is a good thing. If it isn't successfull, don't worry about it,
4169 it probably means the source directory is very clean.
4172 *) Make sure any ENGINE control commands make local copies of string
4173 pointers passed to them whenever necessary. Otherwise it is possible
4174 the caller may have overwritten (or deallocated) the original string
4175 data when a later ENGINE operation tries to use the stored values.
4176 [Götz Babin-Ebell <babinebell@trustcenter.de>]
4178 *) Improve diagnostics in file reading and command-line digests.
4179 [Ben Laurie aided and abetted by Solar Designer <solar@openwall.com>]
4181 *) Add AES modes CFB and OFB to the object database. Correct an
4182 error in AES-CFB decryption.
4185 *) Remove most calls to EVP_CIPHER_CTX_cleanup() in evp_enc.c, this
4186 allows existing EVP_CIPHER_CTX structures to be reused after
4187 calling EVP_*Final(). This behaviour is used by encryption
4188 BIOs and some applications. This has the side effect that
4189 applications must explicitly clean up cipher contexts with
4190 EVP_CIPHER_CTX_cleanup() or they will leak memory.
4193 *) Check the values of dna and dnb in bn_mul_recursive before calling
4194 bn_mul_comba (a non zero value means the a or b arrays do not contain
4195 n2 elements) and fallback to bn_mul_normal if either is not zero.
4198 *) Fix escaping of non-ASCII characters when using the -subj option
4199 of the "openssl req" command line tool. (Robert Joop <joop@fokus.gmd.de>)
4202 *) Make object definitions compliant to LDAP (RFC2256): SN is the short
4203 form for "surname", serialNumber has no short form.
4204 Use "mail" as the short name for "rfc822Mailbox" according to RFC2798;
4205 therefore remove "mail" short name for "internet 7".
4206 The OID for unique identifiers in X509 certificates is
4207 x500UniqueIdentifier, not uniqueIdentifier.
4208 Some more OID additions. (Michael Bell <michael.bell@rz.hu-berlin.de>)
4211 *) Add an "init" command to the ENGINE config module and auto initialize
4212 ENGINEs. Without any "init" command the ENGINE will be initialized
4213 after all ctrl commands have been executed on it. If init=1 the
4214 ENGINE is initailized at that point (ctrls before that point are run
4215 on the uninitialized ENGINE and after on the initialized one). If
4216 init=0 then the ENGINE will not be iniatialized at all.
4219 *) Fix the 'app_verify_callback' interface so that the user-defined
4220 argument is actually passed to the callback: In the
4221 SSL_CTX_set_cert_verify_callback() prototype, the callback
4222 declaration has been changed from
4225 int (*cb)(X509_STORE_CTX *,void *);
4226 in ssl_verify_cert_chain (ssl/ssl_cert.c), the call
4227 i=s->ctx->app_verify_callback(&ctx)
4228 has been changed into
4229 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg).
4231 To update applications using SSL_CTX_set_cert_verify_callback(),
4232 a dummy argument can be added to their callback functions.
4233 [D. K. Smetters <smetters@parc.xerox.com>]
4235 *) Added the '4758cca' ENGINE to support IBM 4758 cards.
4236 [Maurice Gittens <maurice@gittens.nl>, touchups by Geoff Thorpe]
4238 *) Add and OPENSSL_LOAD_CONF define which will cause
4239 OpenSSL_add_all_algorithms() to load the openssl.cnf config file.
4240 This allows older applications to transparently support certain
4241 OpenSSL features: such as crypto acceleration and dynamic ENGINE loading.
4242 Two new functions OPENSSL_add_all_algorithms_noconf() which will never
4243 load the config file and OPENSSL_add_all_algorithms_conf() which will
4244 always load it have also been added.
4247 *) Add the OFB, CFB and CTR (all with 128 bit feedback) to AES.
4248 Adjust NIDs and EVP layer.
4249 [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]
4251 *) Config modules support in openssl utility.
4253 Most commands now load modules from the config file,
4254 though in a few (such as version) this isn't done
4255 because it couldn't be used for anything.
4257 In the case of ca and req the config file used is
4258 the same as the utility itself: that is the -config
4259 command line option can be used to specify an
4263 *) Move default behaviour from OPENSSL_config(). If appname is NULL
4264 use "openssl_conf" if filename is NULL use default openssl config file.
4267 *) Add an argument to OPENSSL_config() to allow the use of an alternative
4268 config section name. Add a new flag to tolerate a missing config file
4269 and move code to CONF_modules_load_file().
4272 *) Support for crypto accelerator cards from Accelerated Encryption
4273 Processing, www.aep.ie. (Use engine 'aep')
4274 The support was copied from 0.9.6c [engine] and adapted/corrected
projects / openssl.git / blob