5 Changes between 1.0.1 and 1.1.0 [xx XXX xxxx]
7 *) Add certificate callback. If set this is called whenever a certificate
8 is required by client or server. An application can decide which
9 certificate chain to present based on arbitrary criteria: for example
10 supported signature algorithms. Add very simple example to s_server.
11 This fixes many of the problems and restrictions of the existing client
12 certificate callback: for example you can now clear an existing
13 certificate and specify the whole chain.
16 *) Add new "valid_flags" field to CERT_PKEY structure which determines what
17 the certificate can be used for (if anything). Set valid_flags field
18 in new tls1_check_chain function. Simplify ssl_set_cert_masks which used
19 to have similar checks in it.
21 Add new "cert_flags" field to CERT structure and include a "strict mode".
22 This enforces some TLS certificate requirements (such as only permitting
23 certificate signature algorithms contained in the supported algorithms
24 extension) which some implementations ignore: this option should be used
25 with caution as it could cause interoperability issues.
28 *) Update and tidy signature algorithm extension processing. Work out
29 shared signature algorithms based on preferences and peer algorithms
30 and print them out in s_client and s_server. Abort handshake if no
31 shared signature algorithms.
34 *) Add new functions to allow customised supported signature algorithms
35 for SSL and SSL_CTX structures. Add options to s_client and s_server
39 *) New function SSL_certs_clear() to delete all references to certificates
40 from an SSL structure. Before this once a certificate had been added
41 it couldn't be removed.
44 *) Initial SSL tracing code. This parses out SSL/TLS records using the
45 message callback and prints the results. Needs compile time option
46 "enable-ssl-trace". New options to s_client and s_server to enable
50 *) New functions to retrieve certificate signature and signature
54 *) Print out deprecated issuer and subject unique ID fields in
59 [Emilia Kasper, Adam Langley, Ben Laurie (Google)]
61 *) Support for automatic EC temporary key parameter selection. If enabled
62 the most preferred EC parameters are automatically used instead of
63 hardcoded fixed parameters. Now a server just has to call:
64 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
65 support ECDH and use the most appropriate parameters.
68 *) Enhance and tidy EC curve and point format TLS extension code. Use
69 static structures instead of allocation if default values are used.
70 New ctrls to set curves we wish to support and to retrieve shared curves.
71 Print out shared curves in s_server. New options to s_server and s_client
72 to set list of supported curves.
75 *) New ctrls to retrieve supported signature algorithms and
76 supported curve values as an array of NIDs. Extend openssl utility
77 to print out received values.
80 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
81 between NIDs and the more common NIST names such as "P-256". Enhance
82 ecparam utility and ECC method to recognise the NIST names for curves.
85 *) Enhance SSL/TLS certificate chain handling to support different
86 chains for each certificate instead of one chain in the parent SSL_CTX.
89 *) Support for fixed DH ciphersuite client authentication: where both
90 server and client use DH certificates with common parameters.
93 *) Support for fixed DH ciphersuites: those requiring DH server
97 *) Transparently support X9.42 DH parameters when calling
98 PEM_read_bio_DHparameters. This means existing applications can handle
99 the new parameter format automatically.
102 *) Initial experimental support for X9.42 DH parameter format: mainly
103 to support use of 'q' parameter for RFC5114 parameters.
106 *) Add DH parameters from RFC5114 including test data to dhtest.
109 *) Update fips_test_suite to support multiple command line options. New
110 test to induce all self test errors in sequence and check expected
114 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
115 sign or verify all in one operation.
118 *) Add fips_algvs: a multicall fips utility incorporaing all the algorithm
119 test programs and fips_test_suite. Includes functionality to parse
120 the minimal script output of fipsalgest.pl directly.
123 *) Add authorisation parameter to FIPS_module_mode_set().
126 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
129 *) Use separate DRBG fields for internal and external flags. New function
130 FIPS_drbg_health_check() to perform on demand health checking. Add
131 generation tests to fips_test_suite with reduced health check interval to
132 demonstrate periodic health checking. Add "nodh" option to
133 fips_test_suite to skip very slow DH test.
136 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
140 *) More extensive health check for DRBG checking many more failure modes.
141 New function FIPS_selftest_drbg_all() to handle every possible DRBG
142 combination: call this in fips_test_suite.
145 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
146 and POST to handle Dual EC cases.
149 *) Add support for canonical generation of DSA parameter 'g'. See
152 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
153 POST to handle HMAC cases.
156 *) Add functions FIPS_module_version() and FIPS_module_version_text()
157 to return numberical and string versions of the FIPS module number.
160 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
161 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implmeneted
162 outside the validated module in the FIPS capable OpenSSL.
165 *) Minor change to DRBG entropy callback semantics. In some cases
166 there is no mutiple of the block length between min_len and
167 max_len. Allow the callback to return more than max_len bytes
168 of entropy but discard any extra: it is the callback's responsibility
169 to ensure that the extra data discarded does not impact the
170 requested amount of entropy.
173 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
174 information in FIPS186-3, SP800-57 and SP800-131A.
177 *) CCM support via EVP. Interface is very similar to GCM case except we
178 must supply all data in one chunk (i.e. no update, final) and the
179 message length must be supplied if AAD is used. Add algorithm test
183 *) Initial version of POST overhaul. Add POST callback to allow the status
184 of POST to be monitored and/or failures induced. Modify fips_test_suite
185 to use callback. Always run all selftests even if one fails.
188 *) XTS support including algorithm test driver in the fips_gcmtest program.
189 Note: this does increase the maximum key length from 32 to 64 bytes but
190 there should be no binary compatibility issues as existing applications
191 will never use XTS mode.
194 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
195 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
196 performs algorithm blocking for unapproved PRNG types. Also do not
197 set PRNG type in FIPS_mode_set(): leave this to the application.
198 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
199 the standard OpenSSL PRNG: set additional data to a date time vector.
202 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
203 This shouldn't present any incompatibility problems because applications
204 shouldn't be using these directly and any that are will need to rethink
205 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
208 *) Extensive self tests and health checking required by SP800-90 DRBG.
209 Remove strength parameter from FIPS_drbg_instantiate and always
210 instantiate at maximum supported strength.
213 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
216 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
219 *) New function DH_compute_key_padded() to compute a DH key and pad with
220 leading zeroes if needed: this complies with SP800-56A et al.
223 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
224 anything, incomplete, subject to change and largely untested at present.
227 *) Modify fipscanisteronly build option to only build the necessary object
228 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
231 *) Add experimental option FIPSSYMS to give all symbols in
232 fipscanister.o and FIPS or fips prefix. This will avoid
233 conflicts with future versions of OpenSSL. Add perl script
234 util/fipsas.pl to preprocess assembly language source files
235 and rename any affected symbols.
238 *) Add selftest checks and algorithm block of non-fips algorithms in
239 FIPS mode. Remove DES2 from selftests.
242 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
243 return internal method without any ENGINE dependencies. Add new
244 tiny fips sign and verify functions.
247 *) New build option no-ec2m to disable characteristic 2 code.
250 *) New build option "fipscanisteronly". This only builds fipscanister.o
251 and (currently) associated fips utilities. Uses the file Makefile.fips
252 instead of Makefile.org as the prototype.
255 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
256 Update fips_gcmtest to use IV generator.
259 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
260 setting output buffer to NULL. The *Final function must be
261 called although it will not retrieve any additional data. The tag
262 can be set or retrieved with a ctrl. The IV length is by default 12
263 bytes (96 bits) but can be set to an alternative value. If the IV
264 length exceeds the maximum IV length (currently 16 bytes) it cannot be
268 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
269 underlying do_cipher function handles all cipher semantics itself
270 including padding and finalisation. This is useful if (for example)
271 an ENGINE cipher handles block padding itself. The behaviour of
272 do_cipher is subtly changed if this flag is set: the return value
273 is the number of characters written to the output buffer (zero is
274 no longer an error code) or a negative error code. Also if the
275 input buffer is NULL and length 0 finalisation should be performed.
278 *) If a candidate issuer certificate is already part of the constructed
279 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
282 *) Improve forward-security support: add functions
284 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
285 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
287 for use by SSL/TLS servers; the callback function will be called whenever a
288 new session is created, and gets to decide whether the session may be
289 cached to make it resumable (return 0) or not (return 1). (As by the
290 SSL/TLS protocol specifications, the session_id sent by the server will be
291 empty to indicate that the session is not resumable; also, the server will
292 not generate RFC 4507 (RFC 5077) session tickets.)
294 A simple reasonable callback implementation is to return is_forward_secure.
295 This parameter will be set to 1 or 0 depending on the ciphersuite selected
296 by the SSL/TLS server library, indicating whether it can provide forward
298 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
300 *) New function OPENSSL_gmtime_diff to find the difference in days
301 and seconds between two tm structures. This will be used to provide
302 additional functionality for ASN1_TIME.
305 *) Add -trusted_first option which attempts to find certificates in the
306 trusted store even if an untrusted chain is also supplied.
309 *) Initial experimental support for explicitly trusted non-root CAs.
310 OpenSSL still tries to build a complete chain to a root but if an
311 intermediate CA has a trust setting included that is used. The first
312 setting is used: whether to trust or reject.
315 *) New -verify_name option in command line utilities to set verification
319 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
320 Add CMAC pkey methods.
323 *) Experimental regnegotiation in s_server -www mode. If the client
324 browses /reneg connection is renegotiated. If /renegcert it is
325 renegotiated requesting a certificate.
328 *) Add an "external" session cache for debugging purposes to s_server. This
329 should help trace issues which normally are only apparent in deployed
330 multi-process servers.
333 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
334 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
335 BIO_set_cipher() and some obscure PEM functions were changed so they
336 can now return an error. The RAND changes required a change to the
337 RAND_METHOD structure.
340 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
341 a gcc attribute to warn if the result of a function is ignored. This
342 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
343 whose return value is often ignored.
346 Changes between 1.0.1c and 1.0.1d [xx XXX xxxx]
348 *) Fix possible deadlock when decoding public keys.
351 *) Don't use TLS 1.0 record version number in initial client hello
355 Changes between 1.0.1b and 1.0.1c [10 May 2012]
357 *) Sanity check record length before skipping explicit IV in TLS
358 1.2, 1.1 and DTLS to avoid DoS attack.
360 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
361 fuzzing as a service testing platform.
365 *) Initialise tkeylen properly when encrypting CMS messages.
366 Thanks to Solar Designer of Openwall for reporting this issue.
369 *) In FIPS mode don't try to use composite ciphers as they are not
373 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
375 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
376 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
377 mean any application compiled against OpenSSL 1.0.0 headers setting
378 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
379 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
380 0x10000000L Any application which was previously compiled against
381 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
382 will need to be recompiled as a result. Letting be results in
383 inability to disable specifically TLS 1.1 and in client context,
384 in unlike event, limit maximum offered version to TLS 1.0 [see below].
387 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
388 disable just protocol X, but all protocols above X *if* there are
389 protocols *below* X still enabled. In more practical terms it means
390 that if application wants to disable TLS1.0 in favor of TLS1.1 and
391 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
392 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
396 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
398 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
399 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
400 in CRYPTO_realloc_clean.
402 Thanks to Tavis Ormandy, Google Security Team, for discovering this
403 issue and to Adam Langley <agl@chromium.org> for fixing it.
405 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
407 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
410 *) Workarounds for some broken servers that "hang" if a client hello
411 record length exceeds 255 bytes:
413 1. Do not use record version number > TLS 1.0 in initial client
414 hello: some (but not all) hanging servers will now work.
415 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
416 the number of ciphers sent in the client hello. This should be
417 set to an even number, such as 50, for example by passing:
418 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
419 Most broken servers should now work.
420 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
421 TLS 1.2 client support entirely.
424 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
427 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
429 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
430 STRING form instead of a DigestInfo.
433 *) The format used for MDC2 RSA signatures is inconsistent between EVP
434 and the RSA_sign/RSA_verify functions. This was made more apparent when
435 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
436 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
437 the correct format in RSA_verify so both forms transparently work.
440 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
441 STRING form instead of a DigestInfo.
444 *) Some servers which support TLS 1.0 can choke if we initially indicate
445 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
446 encrypted premaster secret. As a workaround use the maximum pemitted
447 client version in client hello, this should keep such servers happy
448 and still work with previous versions of OpenSSL.
451 *) Add support for TLS/DTLS heartbeats.
452 [Robin Seggelmann <seggelmann@fh-muenster.de>]
454 *) Add support for SCTP.
455 [Robin Seggelmann <seggelmann@fh-muenster.de>]
457 *) Improved PRNG seeding for VOS.
458 [Paul Green <Paul.Green@stratus.com>]
460 *) Extensive assembler packs updates, most notably:
462 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
463 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
464 - x86_64: bit-sliced AES implementation;
465 - ARM: NEON support, contemporary platforms optimizations;
466 - s390x: z196 support;
467 - *: GHASH and GF(2^m) multiplication implementations;
471 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
472 (removal of unnecessary code)
473 [Peter Sylvester <peter.sylvester@edelweb.fr>]
475 *) Add TLS key material exporter from RFC 5705.
478 *) Add DTLS-SRTP negotiation from RFC 5764.
481 *) Add Next Protocol Negotiation,
482 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
483 disabled with a no-npn flag to config or Configure. Code donated
485 [Adam Langley <agl@google.com> and Ben Laurie]
487 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
488 NIST-P256, NIST-P521, with constant-time single point multiplication on
489 typical inputs. Compiler support for the nonstandard type __uint128_t is
490 required to use this (present in gcc 4.4 and later, for 64-bit builds).
491 Code made available under Apache License version 2.0.
493 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
494 line to include this in your build of OpenSSL, and run "make depend" (or
495 "make update"). This enables the following EC_METHODs:
497 EC_GFp_nistp224_method()
498 EC_GFp_nistp256_method()
499 EC_GFp_nistp521_method()
501 EC_GROUP_new_by_curve_name() will automatically use these (while
502 EC_GROUP_new_curve_GFp() currently prefers the more flexible
504 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
506 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
507 all platforms. Move ssize_t definition from e_os.h to the public
508 header file e_os2.h as it now appears in public header file cms.h
511 *) New -sigopt option to the ca, req and x509 utilities. Additional
512 signature parameters can be passed using this option and in
516 *) Add RSA PSS signing function. This will generate and set the
517 appropriate AlgorithmIdentifiers for PSS based on those in the
518 corresponding EVP_MD_CTX structure. No application support yet.
521 *) Support for companion algorithm specific ASN1 signing routines.
522 New function ASN1_item_sign_ctx() signs a pre-initialised
523 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
524 the appropriate parameters.
527 *) Add new algorithm specific ASN1 verification initialisation function
528 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
529 handling will be the same no matter what EVP_PKEY_METHOD is used.
530 Add a PSS handler to support verification of PSS signatures: checked
531 against a number of sample certificates.
534 *) Add signature printing for PSS. Add PSS OIDs.
535 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
537 *) Add algorithm specific signature printing. An individual ASN1 method
538 can now print out signatures instead of the standard hex dump.
540 More complex signatures (e.g. PSS) can print out more meaningful
541 information. Include DSA version that prints out the signature
545 *) Password based recipient info support for CMS library: implementing
549 *) Split password based encryption into PBES2 and PBKDF2 functions. This
550 neatly separates the code into cipher and PBE sections and is required
551 for some algorithms that split PBES2 into separate pieces (such as
555 *) Session-handling fixes:
556 - Fix handling of connections that are resuming with a session ID,
557 but also support Session Tickets.
558 - Fix a bug that suppressed issuing of a new ticket if the client
559 presented a ticket with an expired session.
560 - Try to set the ticket lifetime hint to something reasonable.
561 - Make tickets shorter by excluding irrelevant information.
562 - On the client side, don't ignore renewed tickets.
563 [Adam Langley, Bodo Moeller (Google)]
565 *) Fix PSK session representation.
568 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
570 This work was sponsored by Intel.
573 *) Add GCM support to TLS library. Some custom code is needed to split
574 the IV between the fixed (from PRF) and explicit (from TLS record)
575 portions. This adds all GCM ciphersuites supported by RFC5288 and
576 RFC5289. Generalise some AES* cipherstrings to inlclude GCM and
577 add a special AESGCM string for GCM only.
580 *) Expand range of ctrls for AES GCM. Permit setting invocation
581 field on decrypt and retrieval of invocation field only on encrypt.
584 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
585 As required by RFC5289 these ciphersuites cannot be used if for
586 versions of TLS earlier than 1.2.
589 *) For FIPS capable OpenSSL interpret a NULL default public key method
590 as unset and return the appopriate default but do *not* set the default.
591 This means we can return the appopriate method in applications that
592 swicth between FIPS and non-FIPS modes.
595 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
596 ENGINE is used then we cannot handle that in the FIPS module so we
597 keep original code iff non-FIPS operations are allowed.
600 *) Add -attime option to openssl utilities.
601 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
603 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
606 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
607 FIPS EC methods unconditionally for now.
610 *) New build option no-ec2m to disable characteristic 2 code.
613 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
614 all cases can be covered as some introduce binary incompatibilities.
617 *) Redirect RSA operations to FIPS module including keygen,
618 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
621 *) Add similar low level API blocking to ciphers.
624 *) Low level digest APIs are not approved in FIPS mode: any attempt
625 to use these will cause a fatal error. Applications that *really* want
626 to use them can use the private_* version instead.
629 *) Redirect cipher operations to FIPS module for FIPS builds.
632 *) Redirect digest operations to FIPS module for FIPS builds.
635 *) Update build system to add "fips" flag which will link in fipscanister.o
636 for static and shared library builds embedding a signature if needed.
639 *) Output TLS supported curves in preference order instead of numerical
640 order. This is currently hardcoded for the highest order curves first.
641 This should be configurable so applications can judge speed vs strength.
644 *) Add TLS v1.2 server support for client authentication.
647 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
651 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
652 FIPS modules versions.
655 *) Add TLS v1.2 client side support for client authentication. Keep cache
656 of handshake records longer as we don't know the hash algorithm to use
657 until after the certificate request message is received.
660 *) Initial TLS v1.2 client support. Add a default signature algorithms
661 extension including all the algorithms we support. Parse new signature
662 format in client key exchange. Relax some ECC signing restrictions for
663 TLS v1.2 as indicated in RFC5246.
666 *) Add server support for TLS v1.2 signature algorithms extension. Switch
667 to new signature format when needed using client digest preference.
668 All server ciphersuites should now work correctly in TLS v1.2. No client
669 support yet and no support for client certificates.
672 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
673 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
674 ciphersuites. At present only RSA key exchange ciphersuites work with
675 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
676 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
677 and version checking.
680 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
681 with this defined it will not be affected by any changes to ssl internal
682 structures. Add several utility functions to allow openssl application
683 to work with OPENSSL_NO_SSL_INTERN defined.
687 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
689 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
692 *) Permit abbreviated handshakes when renegotiating using the function
693 SSL_renegotiate_abbreviated().
694 [Robin Seggelmann <seggelmann@fh-muenster.de>]
696 *) Add call to ENGINE_register_all_complete() to
697 ENGINE_load_builtin_engines(), so some implementations get used
698 automatically instead of needing explicit application support.
701 *) Add support for TLS key exporter as described in RFC5705.
702 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
704 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
705 a few changes are required:
707 Add SSL_OP_NO_TLSv1_1 flag.
709 Update version checking logic to handle version 1.1.
710 Add explicit IV handling (ported from DTLS code).
711 Add command line options to s_client/s_server.
714 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
716 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
717 in CMS and PKCS7 code. When RSA decryption fails use a random key for
718 content decryption and always return the same error. Note: this attack
719 needs on average 2^20 messages so it only affects automated senders. The
720 old behaviour can be reenabled in the CMS code by setting the
721 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
722 an MMA defence is not necessary.
723 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
724 this issue. (CVE-2012-0884)
727 *) Fix CVE-2011-4619: make sure we really are receiving a
728 client hello before rejecting multiple SGC restarts. Thanks to
729 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
732 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
734 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
735 Thanks to Antonio Martin, Enterprise Secure Access Research and
736 Development, Cisco Systems, Inc. for discovering this bug and
737 preparing a fix. (CVE-2012-0050)
740 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
742 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
743 of the Vaudenay padding oracle attack on CBC mode encryption
744 which enables an efficient plaintext recovery attack against
745 the OpenSSL implementation of DTLS. Their attack exploits timing
746 differences arising during decryption processing. A research
747 paper describing this attack can be found at:
748 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
749 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
750 Security Group at Royal Holloway, University of London
751 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
752 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
753 for preparing the fix. (CVE-2011-4108)
754 [Robin Seggelmann, Michael Tuexen]
756 *) Clear bytes used for block padding of SSL 3.0 records.
758 [Adam Langley (Google)]
760 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
761 Kadianakis <desnacked@gmail.com> for discovering this issue and
762 Adam Langley for preparing the fix. (CVE-2011-4619)
763 [Adam Langley (Google)]
765 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
766 [Andrey Kulikov <amdeich@gmail.com>]
768 *) Prevent malformed RFC3779 data triggering an assertion failure.
769 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
770 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
771 [Rob Austein <sra@hactrn.net>]
773 *) Improved PRNG seeding for VOS.
774 [Paul Green <Paul.Green@stratus.com>]
776 *) Fix ssl_ciph.c set-up race.
777 [Adam Langley (Google)]
779 *) Fix spurious failures in ecdsatest.c.
780 [Emilia Käsper (Google)]
782 *) Fix the BIO_f_buffer() implementation (which was mixing different
783 interpretations of the '..._len' fields).
784 [Adam Langley (Google)]
786 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
787 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
788 threads won't reuse the same blinding coefficients.
790 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
791 lock to call BN_BLINDING_invert_ex, and avoids one use of
792 BN_BLINDING_update for each BN_BLINDING structure (previously,
793 the last update always remained unused).
794 [Emilia Käsper (Google)]
796 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
797 [Bob Buckholz (Google)]
799 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
801 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
802 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
803 [Kaspar Brand <ossl@velox.ch>]
805 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
806 for multi-threaded use of ECDH. (CVE-2011-3210)
807 [Adam Langley (Google)]
809 *) Fix x509_name_ex_d2i memory leak on bad inputs.
812 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
813 signature public key algorithm by using OID xref utilities instead.
814 Before this you could only use some ECC ciphersuites with SHA1 only.
817 *) Add protection against ECDSA timing attacks as mentioned in the paper
818 by Billy Bob Brumley and Nicola Tuveri, see:
820 http://eprint.iacr.org/2011/232.pdf
822 [Billy Bob Brumley and Nicola Tuveri]
824 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
826 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
827 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
829 *) Fix bug in string printing code: if *any* escaping is enabled we must
830 escape the escape character (backslash) or the resulting string is
834 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
836 *) Disable code workaround for ancient and obsolete Netscape browsers
837 and servers: an attacker can use it in a ciphersuite downgrade attack.
838 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
841 *) Fixed J-PAKE implementation error, originally discovered by
842 Sebastien Martini, further info and confirmation from Stefan
843 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
846 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
848 *) Fix extension code to avoid race conditions which can result in a buffer
849 overrun vulnerability: resumed sessions must not be modified as they can
850 be shared by multiple threads. CVE-2010-3864
853 *) Fix WIN32 build system to correctly link an ENGINE directory into
857 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
859 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
861 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
863 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
865 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
866 context. The operation can be customised via the ctrl mechanism in
867 case ENGINEs want to include additional functionality.
870 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
873 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
874 output hashes compatible with older versions of OpenSSL.
875 [Willy Weisz <weisz@vcpc.univie.ac.at>]
877 *) Fix compression algorithm handling: if resuming a session use the
878 compression algorithm of the resumed session instead of determining
879 it from client hello again. Don't allow server to change algorithm.
882 *) Add load_crls() function to apps tidying load_certs() too. Add option
883 to verify utility to allow additional CRLs to be included.
886 *) Update OCSP request code to permit adding custom headers to the request:
887 some responders need this.
890 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
892 [Julia Lawall <julia@diku.dk>]
894 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
895 needlessly dereferenced structures, used obsolete functions and
896 didn't handle all updated verify codes correctly.
899 *) Disable MD2 in the default configuration.
902 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
903 indicate the initial BIO being pushed or popped. This makes it possible
904 to determine whether the BIO is the one explicitly called or as a result
905 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
906 it handles reference counts correctly and doesn't zero out the I/O bio
907 when it is not being explicitly popped. WARNING: applications which
908 included workarounds for the old buggy behaviour will need to be modified
909 or they could free up already freed BIOs.
912 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
913 renaming to all platforms (within the 0.9.8 branch, this was
914 done conditionally on Netware platforms to avoid a name clash).
915 [Guenter <lists@gknw.net>]
917 *) Add ECDHE and PSK support to DTLS.
918 [Michael Tuexen <tuexen@fh-muenster.de>]
920 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
924 *) Add "missing" function EVP_MD_flags() (without this the only way to
925 retrieve a digest flags is by accessing the structure directly. Update
926 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
927 or cipher is registered as in the "from" argument. Print out all
928 registered digests in the dgst usage message instead of manually
929 attempting to work them out.
932 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
933 this allows the use of compression and extensions. Change default cipher
934 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
935 by default unless an application cipher string requests it.
938 *) Alter match criteria in PKCS12_parse(). It used to try to use local
939 key ids to find matching certificates and keys but some PKCS#12 files
940 don't follow the (somewhat unwritten) rules and this strategy fails.
941 Now just gather all certificates together and the first private key
942 then look for the first certificate that matches the key.
945 *) Support use of registered digest and cipher names for dgst and cipher
946 commands instead of having to add each one as a special case. So now
953 openssl dgst -sha256 foo
955 and this works for ENGINE based algorithms too.
959 *) Update Gost ENGINE to support parameter files.
960 [Victor B. Wagner <vitus@cryptocom.ru>]
962 *) Support GeneralizedTime in ca utility.
963 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
965 *) Enhance the hash format used for certificate directory links. The new
966 form uses the canonical encoding (meaning equivalent names will work
967 even if they aren't identical) and uses SHA1 instead of MD5. This form
968 is incompatible with the older format and as a result c_rehash should
969 be used to rebuild symbolic links.
972 *) Make PKCS#8 the default write format for private keys, replacing the
973 traditional format. This form is standardised, more secure and doesn't
974 include an implicit MD5 dependency.
977 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
978 committed to OpenSSL should pass this lot as a minimum.
981 *) Add session ticket override functionality for use by EAP-FAST.
982 [Jouni Malinen <j@w1.fi>]
984 *) Modify HMAC functions to return a value. Since these can be implemented
985 in an ENGINE errors can occur.
988 *) Type-checked OBJ_bsearch_ex.
991 *) Type-checked OBJ_bsearch. Also some constification necessitated
992 by type-checking. Still to come: TXT_DB, bsearch(?),
993 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
997 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
998 seconds to a tm structure directly, instead of going through OS
999 specific date routines. This avoids any issues with OS routines such
1000 as the year 2038 bug. New *_adj() functions for ASN1 time structures
1001 and X509_time_adj_ex() to cover the extended range. The existing
1002 X509_time_adj() is still usable and will no longer have any date issues.
1005 *) Delta CRL support. New use deltas option which will attempt to locate
1006 and search any appropriate delta CRLs available.
1008 This work was sponsored by Google.
1011 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
1012 code and add additional score elements. Validate alternate CRL paths
1013 as part of the CRL checking and indicate a new error "CRL path validation
1014 error" in this case. Applications wanting additional details can use
1015 the verify callback and check the new "parent" field. If this is not
1016 NULL CRL path validation is taking place. Existing applications wont
1017 see this because it requires extended CRL support which is off by
1020 This work was sponsored by Google.
1023 *) Support for freshest CRL extension.
1025 This work was sponsored by Google.
1028 *) Initial indirect CRL support. Currently only supported in the CRLs
1029 passed directly and not via lookup. Process certificate issuer
1030 CRL entry extension and lookup CRL entries by bother issuer name
1031 and serial number. Check and process CRL issuer entry in IDP extension.
1033 This work was sponsored by Google.
1036 *) Add support for distinct certificate and CRL paths. The CRL issuer
1037 certificate is validated separately in this case. Only enabled if
1038 an extended CRL support flag is set: this flag will enable additional
1039 CRL functionality in future.
1041 This work was sponsored by Google.
1044 *) Add support for policy mappings extension.
1046 This work was sponsored by Google.
1049 *) Fixes to pathlength constraint, self issued certificate handling,
1050 policy processing to align with RFC3280 and PKITS tests.
1052 This work was sponsored by Google.
1055 *) Support for name constraints certificate extension. DN, email, DNS
1056 and URI types are currently supported.
1058 This work was sponsored by Google.
1061 *) To cater for systems that provide a pointer-based thread ID rather
1062 than numeric, deprecate the current numeric thread ID mechanism and
1063 replace it with a structure and associated callback type. This
1064 mechanism allows a numeric "hash" to be extracted from a thread ID in
1065 either case, and on platforms where pointers are larger than 'long',
1066 mixing is done to help ensure the numeric 'hash' is usable even if it
1067 can't be guaranteed unique. The default mechanism is to use "&errno"
1068 as a pointer-based thread ID to distinguish between threads.
1070 Applications that want to provide their own thread IDs should now use
1071 CRYPTO_THREADID_set_callback() to register a callback that will call
1072 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
1074 Note that ERR_remove_state() is now deprecated, because it is tied
1075 to the assumption that thread IDs are numeric. ERR_remove_state(0)
1076 to free the current thread's error state should be replaced by
1077 ERR_remove_thread_state(NULL).
1079 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
1080 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
1081 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
1082 application was previously providing a numeric thread callback that
1083 was inappropriate for distinguishing threads, then uniqueness might
1084 have been obtained with &errno that happened immediately in the
1085 intermediate development versions of OpenSSL; this is no longer the
1086 case, the numeric thread callback will now override the automatic use
1088 [Geoff Thorpe, with help from Bodo Moeller]
1090 *) Initial support for different CRL issuing certificates. This covers a
1091 simple case where the self issued certificates in the chain exist and
1092 the real CRL issuer is higher in the existing chain.
1094 This work was sponsored by Google.
1097 *) Removed effectively defunct crypto/store from the build.
1100 *) Revamp of STACK to provide stronger type-checking. Still to come:
1101 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
1102 ASN1_STRING, CONF_VALUE.
1105 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
1106 RAM on SSL connections. This option can save about 34k per idle SSL.
1109 *) Revamp of LHASH to provide stronger type-checking. Still to come:
1110 STACK, TXT_DB, bsearch, qsort.
1113 *) Initial support for Cryptographic Message Syntax (aka CMS) based
1114 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
1115 support for data, signedData, compressedData, digestedData and
1116 encryptedData, envelopedData types included. Scripts to check against
1117 RFC4134 examples draft and interop and consistency checks of many
1118 content types and variants.
1121 *) Add options to enc utility to support use of zlib compression BIO.
1124 *) Extend mk1mf to support importing of options and assembly language
1125 files from Configure script, currently only included in VC-WIN32.
1126 The assembly language rules can now optionally generate the source
1127 files from the associated perl scripts.
1130 *) Implement remaining functionality needed to support GOST ciphersuites.
1131 Interop testing has been performed using CryptoPro implementations.
1132 [Victor B. Wagner <vitus@cryptocom.ru>]
1134 *) s390x assembler pack.
1137 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
1141 *) Implement Opaque PRF Input TLS extension as specified in
1142 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
1143 official specification yet and no extension type assignment by
1144 IANA exists, this extension (for now) will have to be explicitly
1145 enabled when building OpenSSL by providing the extension number
1146 to use. For example, specify an option
1148 -DTLSEXT_TYPE_opaque_prf_input=0x9527
1150 to the "config" or "Configure" script to enable the extension,
1151 assuming extension number 0x9527 (which is a completely arbitrary
1152 and unofficial assignment based on the MD5 hash of the Internet
1153 Draft). Note that by doing so, you potentially lose
1154 interoperability with other TLS implementations since these might
1155 be using the same extension number for other purposes.
1157 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
1158 opaque PRF input value to use in the handshake. This will create
1159 an interal copy of the length-'len' string at 'src', and will
1160 return non-zero for success.
1162 To get more control and flexibility, provide a callback function
1165 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
1166 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
1170 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
1173 Callback function 'cb' will be called in handshakes, and is
1174 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
1175 Argument 'arg' is for application purposes (the value as given to
1176 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
1177 be provided to the callback function). The callback function
1178 has to return non-zero to report success: usually 1 to use opaque
1179 PRF input just if possible, or 2 to enforce use of the opaque PRF
1180 input. In the latter case, the library will abort the handshake
1181 if opaque PRF input is not successfully negotiated.
1183 Arguments 'peerinput' and 'len' given to the callback function
1184 will always be NULL and 0 in the case of a client. A server will
1185 see the client's opaque PRF input through these variables if
1186 available (NULL and 0 otherwise). Note that if the server
1187 provides an opaque PRF input, the length must be the same as the
1188 length of the client's opaque PRF input.
1190 Note that the callback function will only be called when creating
1191 a new session (session resumption can resume whatever was
1192 previously negotiated), and will not be called in SSL 2.0
1193 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
1194 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
1195 for applications that need to enforce opaque PRF input.
1199 *) Update ssl code to support digests other than SHA1+MD5 for handshake
1202 [Victor B. Wagner <vitus@cryptocom.ru>]
1204 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1205 RFC4507bis. The encrypted ticket format is an encrypted encoded
1206 SSL_SESSION structure, that way new session features are automatically
1209 If a client application caches session in an SSL_SESSION structure
1210 support is transparent because tickets are now stored in the encoded
1213 The SSL_CTX structure automatically generates keys for ticket
1214 protection in servers so again support should be possible
1215 with no application modification.
1217 If a client or server wishes to disable RFC4507 support then the option
1218 SSL_OP_NO_TICKET can be set.
1220 Add a TLS extension debugging callback to allow the contents of any client
1221 or server extensions to be examined.
1223 This work was sponsored by Google.
1226 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
1227 OpenSSL should now compile cleanly on gcc 4.2
1228 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
1230 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
1231 support including streaming MAC support: this is required for GOST
1232 ciphersuite support.
1233 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
1235 *) Add option -stream to use PKCS#7 streaming in smime utility. New
1236 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
1237 to output in BER and PEM format.
1240 *) Experimental support for use of HMAC via EVP_PKEY interface. This
1241 allows HMAC to be handled via the EVP_DigestSign*() interface. The
1242 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
1243 ENGINE support for HMAC keys which are unextractable. New -mac and
1244 -macopt options to dgst utility.
1247 *) New option -sigopt to dgst utility. Update dgst to use
1248 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
1249 alternative signing paramaters such as X9.31 or PSS in the dgst
1253 *) Change ssl_cipher_apply_rule(), the internal function that does
1254 the work each time a ciphersuite string requests enabling
1255 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
1256 removing ("!foo+bar") a class of ciphersuites: Now it maintains
1257 the order of disabled ciphersuites such that those ciphersuites
1258 that most recently went from enabled to disabled not only stay
1259 in order with respect to each other, but also have higher priority
1260 than other disabled ciphersuites the next time ciphersuites are
1263 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
1264 the same ciphersuites as with "HIGH" alone, but in a specific
1265 order where the PSK ciphersuites come first (since they are the
1266 most recently disabled ciphersuites when "HIGH" is parsed).
1268 Also, change ssl_create_cipher_list() (using this new
1269 funcionality) such that between otherwise identical
1270 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
1274 *) Change ssl_create_cipher_list() so that it automatically
1275 arranges the ciphersuites in reasonable order before starting
1276 to process the rule string. Thus, the definition for "DEFAULT"
1277 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
1278 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
1279 This makes it much easier to arrive at a reasonable default order
1280 in applications for which anonymous ciphers are OK (meaning
1281 that you can't actually use DEFAULT).
1282 [Bodo Moeller; suggested by Victor Duchovni]
1284 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
1285 processing) into multiple integers instead of setting
1286 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
1287 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
1288 (These masks as well as the individual bit definitions are hidden
1289 away into the non-exported interface ssl/ssl_locl.h, so this
1290 change to the definition of the SSL_CIPHER structure shouldn't
1291 affect applications.) This give us more bits for each of these
1292 categories, so there is no longer a need to coagulate AES128 and
1293 AES256 into a single algorithm bit, and to coagulate Camellia128
1294 and Camellia256 into a single algorithm bit, which has led to all
1297 Thus, among other things, the kludge introduced in 0.9.7m and
1298 0.9.8e for masking out AES256 independently of AES128 or masking
1299 out Camellia256 independently of AES256 is not needed here in 0.9.9.
1301 With the change, we also introduce new ciphersuite aliases that
1302 so far were missing: "AES128", "AES256", "CAMELLIA128", and
1306 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
1307 Use the leftmost N bytes of the signature input if the input is
1308 larger than the prime q (with N being the size in bytes of q).
1311 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
1312 it yet and it is largely untested.
1315 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
1318 *) Initial incomplete changes to avoid need for function casts in OpenSSL
1319 some compilers (gcc 4.2 and later) reject their use. Safestack is
1320 reimplemented. Update ASN1 to avoid use of legacy functions.
1323 *) Win32/64 targets are linked with Winsock2.
1326 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
1327 to external functions. This can be used to increase CRL handling
1328 efficiency especially when CRLs are very large by (for example) storing
1329 the CRL revoked certificates in a database.
1332 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
1333 new CRLs added to a directory can be used. New command line option
1334 -verify_return_error to s_client and s_server. This causes real errors
1335 to be returned by the verify callback instead of carrying on no matter
1336 what. This reflects the way a "real world" verify callback would behave.
1339 *) GOST engine, supporting several GOST algorithms and public key formats.
1340 Kindly donated by Cryptocom.
1343 *) Partial support for Issuing Distribution Point CRL extension. CRLs
1344 partitioned by DP are handled but no indirect CRL or reason partitioning
1345 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
1346 selected via a scoring technique which handles IDP and AKID in CRLs.
1349 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
1350 will ultimately be used for all verify operations: this will remove the
1351 X509_STORE dependency on certificate verification and allow alternative
1352 lookup methods. X509_STORE based implementations of these two callbacks.
1355 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
1356 Modify get_crl() to find a valid (unexpired) CRL if possible.
1359 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
1360 this would be called X509_CRL_cmp() but that name is already used by
1361 a function that just compares CRL issuer names. Cache several CRL
1362 extensions in X509_CRL structure and cache CRLDP in X509.
1365 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
1366 this maps equivalent X509_NAME structures into a consistent structure.
1367 Name comparison can then be performed rapidly using memcmp().
1370 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
1374 *) Allow digests to supply their own micalg string for S/MIME type using
1375 the ctrl EVP_MD_CTRL_MICALG.
1378 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
1379 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
1380 ctrl. It can then customise the structure before and/or after signing
1384 *) New function OBJ_add_sigid() to allow application defined signature OIDs
1385 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
1386 to free up any added signature OIDs.
1389 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
1390 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
1391 digest and cipher tables. New options added to openssl utility:
1392 list-message-digest-algorithms and list-cipher-algorithms.
1395 *) Change the array representation of binary polynomials: the list
1396 of degrees of non-zero coefficients is now terminated with -1.
1397 Previously it was terminated with 0, which was also part of the
1398 value; thus, the array representation was not applicable to
1399 polynomials where t^0 has coefficient zero. This change makes
1400 the array representation useful in a more general context.
1403 *) Various modifications and fixes to SSL/TLS cipher string
1404 handling. For ECC, the code now distinguishes between fixed ECDH
1405 with RSA certificates on the one hand and with ECDSA certificates
1406 on the other hand, since these are separate ciphersuites. The
1407 unused code for Fortezza ciphersuites has been removed.
1409 For consistency with EDH, ephemeral ECDH is now called "EECDH"
1410 (not "ECDHE"). For consistency with the code for DH
1411 certificates, use of ECDH certificates is now considered ECDH
1412 authentication, not RSA or ECDSA authentication (the latter is
1413 merely the CA's signing algorithm and not actively used in the
1416 The temporary ciphersuite alias "ECCdraft" is no longer
1417 available, and ECC ciphersuites are no longer excluded from "ALL"
1418 and "DEFAULT". The following aliases now exist for RFC 4492
1419 ciphersuites, most of these by analogy with the DH case:
1421 kECDHr - ECDH cert, signed with RSA
1422 kECDHe - ECDH cert, signed with ECDSA
1423 kECDH - ECDH cert (signed with either RSA or ECDSA)
1424 kEECDH - ephemeral ECDH
1425 ECDH - ECDH cert or ephemeral ECDH
1431 AECDH - anonymous ECDH
1432 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
1436 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
1437 Use correct micalg parameters depending on digest(s) in signed message.
1440 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
1441 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
1444 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
1445 an engine to register a method. Add ENGINE lookups for methods and
1446 functional reference processing.
1449 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
1450 EVP_{Sign,Verify}* which allow an application to customise the signature
1454 *) New -resign option to smime utility. This adds one or more signers
1455 to an existing PKCS#7 signedData structure. Also -md option to use an
1456 alternative message digest algorithm for signing.
1459 *) Tidy up PKCS#7 routines and add new functions to make it easier to
1460 create PKCS7 structures containing multiple signers. Update smime
1461 application to support multiple signers.
1464 *) New -macalg option to pkcs12 utility to allow setting of an alternative
1468 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
1469 Reorganize PBE internals to lookup from a static table using NIDs,
1470 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
1471 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
1472 PRF which will be automatically used with PBES2.
1475 *) Replace the algorithm specific calls to generate keys in "req" with the
1479 *) Update PKCS#7 enveloped data routines to use new API. This is now
1480 supported by any public key method supporting the encrypt operation. A
1481 ctrl is added to allow the public key algorithm to examine or modify
1482 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
1486 *) Add a ctrl to asn1 method to allow a public key algorithm to express
1487 a default digest type to use. In most cases this will be SHA1 but some
1488 algorithms (such as GOST) need to specify an alternative digest. The
1489 return value indicates how strong the prefernce is 1 means optional and
1490 2 is mandatory (that is it is the only supported type). Modify
1491 ASN1_item_sign() to accept a NULL digest argument to indicate it should
1492 use the default md. Update openssl utilities to use the default digest
1493 type for signing if it is not explicitly indicated.
1496 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
1497 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
1498 signing method from the key type. This effectively removes the link
1499 between digests and public key types.
1502 *) Add an OID cross reference table and utility functions. Its purpose is to
1503 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
1504 rsaEncryption. This will allow some of the algorithm specific hackery
1505 needed to use the correct OID to be removed.
1508 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
1509 structures for PKCS7_sign(). They are now set up by the relevant public
1513 *) Add provisional EC pkey method with support for ECDSA and ECDH.
1516 *) Add support for key derivation (agreement) in the API, DH method and
1520 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
1521 public and private key formats. As a side effect these add additional
1522 command line functionality not previously available: DSA signatures can be
1523 generated and verified using pkeyutl and DH key support and generation in
1528 [Oliver Tappe <zooey@hirschkaefer.de>]
1530 *) New make target "install_html_docs" installs HTML renditions of the
1532 [Oliver Tappe <zooey@hirschkaefer.de>]
1534 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
1535 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
1536 support key and parameter generation and add initial key generation
1537 functionality for RSA.
1540 *) Add functions for main EVP_PKEY_method operations. The undocumented
1541 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
1542 EVP_PKEY_{encrypt,decrypt}_old.
1545 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
1546 key API, doesn't do much yet.
1549 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
1550 public key algorithms. New option to openssl utility:
1551 "list-public-key-algorithms" to print out info.
1554 *) Implement the Supported Elliptic Curves Extension for
1555 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1558 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
1559 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
1562 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
1563 utilities such as rsa, dsa, dsaparam etc except they process any key
1567 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
1568 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
1569 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
1573 *) Initial support for pluggable public key ASN1.
1574 De-spaghettify the public key ASN1 handling. Move public and private
1575 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
1576 algorithm specific handling to a single module within the relevant
1577 algorithm directory. Add functions to allow (near) opaque processing
1578 of public and private key structures.
1581 *) Implement the Supported Point Formats Extension for
1582 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1585 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
1586 for the psk identity [hint] and the psk callback functions to the
1587 SSL_SESSION, SSL and SSL_CTX structure.
1590 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
1594 SSL_CTX_use_psk_identity_hint
1595 SSL_get_psk_identity_hint
1596 SSL_get_psk_identity
1597 SSL_use_psk_identity_hint
1599 [Mika Kousa and Pasi Eronen of Nokia Corporation]
1601 *) Add RFC 3161 compliant time stamp request creation, response generation
1602 and response verification functionality.
1603 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
1605 *) Add initial support for TLS extensions, specifically for the server_name
1606 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1607 have new members for a host name. The SSL data structure has an
1608 additional member SSL_CTX *initial_ctx so that new sessions can be
1609 stored in that context to allow for session resumption, even after the
1610 SSL has been switched to a new SSL_CTX in reaction to a client's
1611 server_name extension.
1613 New functions (subject to change):
1615 SSL_get_servername()
1616 SSL_get_servername_type()
1619 New CTRL codes and macros (subject to change):
1621 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1622 - SSL_CTX_set_tlsext_servername_callback()
1623 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1624 - SSL_CTX_set_tlsext_servername_arg()
1625 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1627 openssl s_client has a new '-servername ...' option.
1629 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1630 '-key2 ...', '-servername_fatal' (subject to change). This allows
1631 testing the HostName extension for a specific single host name ('-cert'
1632 and '-key' remain fallbacks for handshakes without HostName
1633 negotiation). If the unrecogninzed_name alert has to be sent, this by
1634 default is a warning; it becomes fatal with the '-servername_fatal'
1637 [Peter Sylvester, Remy Allais, Christophe Renou]
1639 *) Whirlpool hash implementation is added.
1642 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
1643 bn(64,32). Because of instruction set limitations it doesn't have
1644 any negative impact on performance. This was done mostly in order
1645 to make it possible to share assembler modules, such as bn_mul_mont
1646 implementations, between 32- and 64-bit builds without hassle.
1649 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
1650 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
1654 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
1655 dedicated Montgomery multiplication procedure, is introduced.
1656 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
1657 "64-bit" performance on certain 32-bit targets.
1660 *) New option SSL_OP_NO_COMP to disable use of compression selectively
1661 in SSL structures. New SSL ctrl to set maximum send fragment size.
1662 Save memory by seeting the I/O buffer sizes dynamically instead of
1663 using the maximum available value.
1666 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
1667 in addition to the text details.
1670 *) Very, very preliminary EXPERIMENTAL support for printing of general
1671 ASN1 structures. This currently produces rather ugly output and doesn't
1672 handle several customised structures at all.
1675 *) Integrated support for PVK file format and some related formats such
1676 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
1677 these in the 'rsa' and 'dsa' utilities.
1680 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
1683 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
1684 place for the (very old) "NETSCAPE" format certificates which are now
1685 handled using new ASN1 code equivalents.
1688 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
1689 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
1690 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
1693 *) Modify CRL distribution points extension code to print out previously
1694 unsupported fields. Enhance extension setting code to allow setting of
1698 *) Add print and set support for Issuing Distribution Point CRL extension.
1701 *) Change 'Configure' script to enable Camellia by default.
1704 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
1706 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1707 Thanks to Antonio Martin, Enterprise Secure Access Research and
1708 Development, Cisco Systems, Inc. for discovering this bug and
1709 preparing a fix. (CVE-2012-0050)
1712 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
1714 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1715 of the Vaudenay padding oracle attack on CBC mode encryption
1716 which enables an efficient plaintext recovery attack against
1717 the OpenSSL implementation of DTLS. Their attack exploits timing
1718 differences arising during decryption processing. A research
1719 paper describing this attack can be found at:
1720 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1721 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1722 Security Group at Royal Holloway, University of London
1723 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1724 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1725 for preparing the fix. (CVE-2011-4108)
1726 [Robin Seggelmann, Michael Tuexen]
1728 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
1729 [Ben Laurie, Kasper <ekasper@google.com>]
1731 *) Clear bytes used for block padding of SSL 3.0 records.
1733 [Adam Langley (Google)]
1735 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1736 Kadianakis <desnacked@gmail.com> for discovering this issue and
1737 Adam Langley for preparing the fix. (CVE-2011-4619)
1738 [Adam Langley (Google)]
1740 *) Prevent malformed RFC3779 data triggering an assertion failure.
1741 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1742 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1743 [Rob Austein <sra@hactrn.net>]
1745 *) Fix ssl_ciph.c set-up race.
1746 [Adam Langley (Google)]
1748 *) Fix spurious failures in ecdsatest.c.
1749 [Emilia Käsper (Google)]
1751 *) Fix the BIO_f_buffer() implementation (which was mixing different
1752 interpretations of the '..._len' fields).
1753 [Adam Langley (Google)]
1755 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1756 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1757 threads won't reuse the same blinding coefficients.
1759 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1760 lock to call BN_BLINDING_invert_ex, and avoids one use of
1761 BN_BLINDING_update for each BN_BLINDING structure (previously,
1762 the last update always remained unused).
1763 [Emilia Käsper (Google)]
1765 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1766 for multi-threaded use of ECDH.
1767 [Adam Langley (Google)]
1769 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1772 *) Add protection against ECDSA timing attacks as mentioned in the paper
1773 by Billy Bob Brumley and Nicola Tuveri, see:
1775 http://eprint.iacr.org/2011/232.pdf
1777 [Billy Bob Brumley and Nicola Tuveri]
1779 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
1781 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1782 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1784 *) Fix bug in string printing code: if *any* escaping is enabled we must
1785 escape the escape character (backslash) or the resulting string is
1789 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
1791 *) Disable code workaround for ancient and obsolete Netscape browsers
1792 and servers: an attacker can use it in a ciphersuite downgrade attack.
1793 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1796 *) Fixed J-PAKE implementation error, originally discovered by
1797 Sebastien Martini, further info and confirmation from Stefan
1798 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1801 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
1803 *) Fix extension code to avoid race conditions which can result in a buffer
1804 overrun vulnerability: resumed sessions must not be modified as they can
1805 be shared by multiple threads. CVE-2010-3864
1808 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
1811 *) Don't reencode certificate when calculating signature: cache and use
1812 the original encoding instead. This makes signature verification of
1813 some broken encodings work correctly.
1816 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
1817 is also one of the inputs.
1818 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
1820 *) Don't repeatedly append PBE algorithms to table if they already exist.
1821 Sort table on each new add. This effectively makes the table read only
1822 after all algorithms are added and subsequent calls to PKCS12_pbe_add
1826 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
1828 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
1831 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
1832 access or freeing data twice (CVE-2010-0742)
1833 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
1835 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
1836 common in certificates and some applications which only call
1837 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
1841 Reduce copying into .apps and .test in makevms.com
1842 Don't try to use blank CA certificate in CA.com
1843 Allow use of C files from original directories in maketests.com
1844 [Steven M. Schweda" <sms@antinode.info>]
1846 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
1848 *) When rejecting SSL/TLS records due to an incorrect version number, never
1849 update s->server with a new major version number. As of
1850 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
1851 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
1852 the previous behavior could result in a read attempt at NULL when
1853 receiving specific incorrect SSL/TLS records once record payload
1854 protection is active. (CVE-2010-0740)
1855 [Bodo Moeller, Adam Langley <agl@chromium.org>]
1857 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
1858 could be crashed if the relevant tables were not present (e.g. chrooted).
1859 [Tomas Hoger <thoger@redhat.com>]
1861 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
1863 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
1864 [Martin Olsson, Neel Mehta]
1866 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
1867 accommodate for stack sorting, always a write lock!).
1870 *) On some versions of WIN32 Heap32Next is very slow. This can cause
1871 excessive delays in the RAND_poll(): over a minute. As a workaround
1872 include a time check in the inner Heap32Next loop too.
1875 *) The code that handled flushing of data in SSL/TLS originally used the
1876 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
1877 the problem outlined in PR#1949. The fix suggested there however can
1878 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
1879 of Apache). So instead simplify the code to flush unconditionally.
1880 This should be fine since flushing with no data to flush is a no op.
1883 *) Handle TLS versions 2.0 and later properly and correctly use the
1884 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
1885 off ancient servers have a habit of sticking around for a while...
1888 *) Modify compression code so it frees up structures without using the
1889 ex_data callbacks. This works around a problem where some applications
1890 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
1891 restarting) then use compression (e.g. SSL with compression) later.
1892 This results in significant per-connection memory leaks and
1893 has caused some security issues including CVE-2008-1678 and
1897 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
1898 change when encrypting or decrypting.
1901 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
1902 connect and renegotiate with servers which do not support RI.
1903 Until RI is more widely deployed this option is enabled by default.
1906 *) Add "missing" ssl ctrls to clear options and mode.
1909 *) If client attempts to renegotiate and doesn't support RI respond with
1910 a no_renegotiation alert as required by RFC5746. Some renegotiating
1911 TLS clients will continue a connection gracefully when they receive
1912 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1913 waiting for a server hello which it will never receive. Now we treat a
1914 received no_renegotiation alert as a fatal error. This is because
1915 applications requesting a renegotiation might well expect it to succeed
1916 and would have no code in place to handle the server denying it so the
1917 only safe thing to do is to terminate the connection.
1920 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1921 peer supports secure renegotiation and 0 otherwise. Print out peer
1922 renegotiation support in s_client/s_server.
1925 *) Replace the highly broken and deprecated SPKAC certification method with
1926 the updated NID creation version. This should correctly handle UTF8.
1929 *) Implement RFC5746. Re-enable renegotiation but require the extension
1930 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1931 turns out to be a bad idea. It has been replaced by
1932 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1933 SSL_CTX_set_options(). This is really not recommended unless you
1934 know what you are doing.
1935 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1937 *) Fixes to stateless session resumption handling. Use initial_ctx when
1938 issuing and attempting to decrypt tickets in case it has changed during
1939 servername handling. Use a non-zero length session ID when attempting
1940 stateless session resumption: this makes it possible to determine if
1941 a resumption has occurred immediately after receiving server hello
1942 (several places in OpenSSL subtly assume this) instead of later in
1946 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1947 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1948 fixes for a few places where the return code is not checked
1950 [Julia Lawall <julia@diku.dk>]
1952 *) Add --strict-warnings option to Configure script to include devteam
1953 warnings in other configurations.
1956 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1957 makes it possible to install openssl libraries in locations which
1958 have names other than "lib", for example "/usr/lib64" which some
1960 [Steve Henson, based on patch from Jeremy Utley]
1962 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1963 X690 8.9.12 and can produce some misleading textual output of OIDs.
1964 [Steve Henson, reported by Dan Kaminsky]
1966 *) Delete MD2 from algorithm tables. This follows the recommendation in
1967 several standards that it is not used in new applications due to
1968 several cryptographic weaknesses. For binary compatibility reasons
1969 the MD2 API is still compiled in by default.
1972 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1976 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1977 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1979 [Guenter <lists@gknw.net>]
1981 *) Fix the server certificate chain building code to use X509_verify_cert(),
1982 it used to have an ad-hoc builder which was unable to cope with anything
1983 other than a simple chain.
1984 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1986 *) Don't check self signed certificate signatures in X509_verify_cert()
1987 by default (a flag can override this): it just wastes time without
1988 adding any security. As a useful side effect self signed root CAs
1989 with non-FIPS digests are now usable in FIPS mode.
1992 *) In dtls1_process_out_of_seq_message() the check if the current message
1993 is already buffered was missing. For every new message was memory
1994 allocated, allowing an attacker to perform an denial of service attack
1995 with sending out of seq handshake messages until there is no memory
1996 left. Additionally every future messege was buffered, even if the
1997 sequence number made no sense and would be part of another handshake.
1998 So only messages with sequence numbers less than 10 in advance will be
1999 buffered. (CVE-2009-1378)
2000 [Robin Seggelmann, discovered by Daniel Mentz]
2002 *) Records are buffered if they arrive with a future epoch to be
2003 processed after finishing the corresponding handshake. There is
2004 currently no limitation to this buffer allowing an attacker to perform
2005 a DOS attack with sending records with future epochs until there is no
2006 memory left. This patch adds the pqueue_size() function to detemine
2007 the size of a buffer and limits the record buffer to 100 entries.
2009 [Robin Seggelmann, discovered by Daniel Mentz]
2011 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
2012 parent structure is freed. (CVE-2009-1379)
2015 *) Handle non-blocking I/O properly in SSL_shutdown() call.
2016 [Darryl Miles <darryl-mailinglists@netbauds.net>]
2019 [Ilya O. <vrghost@gmail.com>]
2021 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
2023 *) Disable renegotiation completely - this fixes a severe security
2024 problem (CVE-2009-3555) at the cost of breaking all
2025 renegotiation. Renegotiation can be re-enabled by setting
2026 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
2027 run-time. This is really not recommended unless you know what
2031 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
2033 *) Don't set val to NULL when freeing up structures, it is freed up by
2034 underlying code. If sizeof(void *) > sizeof(long) this can result in
2035 zeroing past the valid field. (CVE-2009-0789)
2036 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
2038 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
2039 checked correctly. This would allow some invalid signed attributes to
2040 appear to verify correctly. (CVE-2009-0591)
2041 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2043 *) Reject UniversalString and BMPString types with invalid lengths. This
2044 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
2045 a legal length. (CVE-2009-0590)
2048 *) Set S/MIME signing as the default purpose rather than setting it
2049 unconditionally. This allows applications to override it at the store
2053 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2054 to handle some structures.
2057 *) Improve efficiency of mem_gets: don't search whole buffer each time
2059 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2061 *) New -hex option for openssl rand.
2064 *) Print out UTF8String and NumericString when parsing ASN1.
2067 *) Support NumericString type for name components.
2070 *) Allow CC in the environment to override the automatically chosen
2071 compiler. Note that nothing is done to ensure flags work with the
2075 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2077 *) Properly check EVP_VerifyFinal() and similar return values
2079 [Ben Laurie, Bodo Moeller, Google Security Team]
2081 *) Enable TLS extensions by default.
2084 *) Allow the CHIL engine to be loaded, whether the application is
2085 multithreaded or not. (This does not release the developer from the
2086 obligation to set up the dynamic locking callbacks.)
2087 [Sander Temme <sander@temme.net>]
2089 *) Use correct exit code if there is an error in dgst command.
2090 [Steve Henson; problem pointed out by Roland Dirlewanger]
2092 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2093 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2096 *) Add experimental JPAKE support, including demo authentication in
2097 s_client and s_server.
2100 *) Set the comparison function in v3_addr_canonize().
2101 [Rob Austein <sra@hactrn.net>]
2103 *) Add support for XMPP STARTTLS in s_client.
2104 [Philip Paeps <philip@freebsd.org>]
2106 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2107 to ensure that even with this option, only ciphersuites in the
2108 server's preference list will be accepted. (Note that the option
2109 applies only when resuming a session, so the earlier behavior was
2110 just about the algorithm choice for symmetric cryptography.)
2113 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2115 *) Fix NULL pointer dereference if a DTLS server received
2116 ChangeCipherSpec as first record (CVE-2009-1386).
2119 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
2120 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2123 *) The fix in 0.9.8c that supposedly got rid of unsafe
2124 double-checked locking was incomplete for RSA blinding,
2125 addressing just one layer of what turns out to have been
2126 doubly unsafe triple-checked locking.
2128 So now fix this for real by retiring the MONT_HELPER macro
2129 in crypto/rsa/rsa_eay.c.
2131 [Bodo Moeller; problem pointed out by Marius Schilder]
2133 *) Various precautionary measures:
2135 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2137 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2138 (NB: This would require knowledge of the secret session ticket key
2139 to exploit, in which case you'd be SOL either way.)
2141 - Change bn_nist.c so that it will properly handle input BIGNUMs
2142 outside the expected range.
2144 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2147 [Neel Mehta, Bodo Moeller]
2149 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2150 the load fails. Useful for distros.
2151 [Ben Laurie and the FreeBSD team]
2153 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2156 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2159 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2161 This work was sponsored by Logica.
2164 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2165 keystores. Support for SSL/TLS client authentication too.
2166 Not compiled unless enable-capieng specified to Configure.
2168 This work was sponsored by Logica.
2171 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2172 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2173 attribute creation routines such as certifcate requests and PKCS#12
2177 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2179 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2180 handshake which could lead to a cilent crash as found using the
2181 Codenomicon TLS test suite (CVE-2008-1672)
2182 [Steve Henson, Mark Cox]
2184 *) Fix double free in TLS server name extensions which could lead to
2185 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2188 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2190 Clear the error queue to ensure that error entries left from
2191 older function calls do not interfere with the correct operation.
2192 [Lutz Jaenicke, Erik de Castro Lopo]
2194 *) Remove root CA certificates of commercial CAs:
2196 The OpenSSL project does not recommend any specific CA and does not
2197 have any policy with respect to including or excluding any CA.
2198 Therefore it does not make any sense to ship an arbitrary selection
2199 of root CA certificates with the OpenSSL software.
2202 *) RSA OAEP patches to fix two separate invalid memory reads.
2203 The first one involves inputs when 'lzero' is greater than
2204 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
2205 before the beginning of from). The second one involves inputs where
2206 the 'db' section contains nothing but zeroes (there is a one-byte
2207 invalid read after the end of 'db').
2208 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2210 *) Partial backport from 0.9.9-dev:
2212 Introduce bn_mul_mont (dedicated Montgomery multiplication
2213 procedure) as a candidate for BIGNUM assembler implementation.
2214 While 0.9.9-dev uses assembler for various architectures, only
2215 x86_64 is available by default here in the 0.9.8 branch, and
2216 32-bit x86 is available through a compile-time setting.
2218 To try the 32-bit x86 assembler implementation, use Configure
2219 option "enable-montasm" (which exists only for this backport).
2221 As "enable-montasm" for 32-bit x86 disclaims code stability
2222 anyway, in this constellation we activate additional code
2223 backported from 0.9.9-dev for further performance improvements,
2224 namely BN_from_montgomery_word. (To enable this otherwise,
2225 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
2227 [Andy Polyakov (backport partially by Bodo Moeller)]
2229 *) Add TLS session ticket callback. This allows an application to set
2230 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
2231 values. This is useful for key rollover for example where several key
2232 sets may exist with different names.
2235 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
2236 This was broken until now in 0.9.8 releases, such that the only way
2237 a registered ENGINE could be used (assuming it initialises
2238 successfully on the host) was to explicitly set it as the default
2239 for the relevant algorithms. This is in contradiction with 0.9.7
2240 behaviour and the documentation. With this fix, when an ENGINE is
2241 registered into a given algorithm's table of implementations, the
2242 'uptodate' flag is reset so that auto-discovery will be used next
2243 time a new context for that algorithm attempts to select an
2245 [Ian Lister (tweaked by Geoff Thorpe)]
2247 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
2248 implemention in the following ways:
2250 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
2253 Lack of BER streaming support means one pass streaming processing is
2254 only supported if data is detached: setting the streaming flag is
2255 ignored for embedded content.
2257 CMS support is disabled by default and must be explicitly enabled
2258 with the enable-cms configuration option.
2261 *) Update the GMP engine glue to do direct copies between BIGNUM and
2262 mpz_t when openssl and GMP use the same limb size. Otherwise the
2263 existing "conversion via a text string export" trick is still used.
2264 [Paul Sheer <paulsheer@gmail.com>]
2266 *) Zlib compression BIO. This is a filter BIO which compressed and
2267 uncompresses any data passed through it.
2270 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
2271 RFC3394 compatible AES key wrapping.
2274 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
2275 sets string data without copying. X509_ALGOR_set0() and
2276 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
2277 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
2278 from an X509_ATTRIBUTE structure optionally checking it occurs only
2279 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
2283 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
2284 to get the expected BN_FLG_CONSTTIME behavior.
2285 [Bodo Moeller (Google)]
2289 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
2290 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
2291 - added some more tests to do_tests.pl
2292 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
2293 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
2294 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
2295 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
2296 - various changes to netware.pl to enable gcc-cross builds on Win32
2298 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
2299 - various changes to fix missing prototype warnings
2300 - fixed x86nasm.pl to create correct asm files for NASM COFF output
2301 - added AES, WHIRLPOOL and CPUID assembler code to build files
2302 - added missing AES assembler make rules to mk1mf.pl
2303 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
2304 [Guenter Knauf <eflash@gmx.net>]
2306 *) Implement certificate status request TLS extension defined in RFC3546.
2307 A client can set the appropriate parameters and receive the encoded
2308 OCSP response via a callback. A server can query the supplied parameters
2309 and set the encoded OCSP response in the callback. Add simplified examples
2310 to s_client and s_server.
2313 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
2315 *) Fix various bugs:
2316 + Binary incompatibility of ssl_ctx_st structure
2317 + DTLS interoperation with non-compliant servers
2318 + Don't call get_session_cb() without proposed session
2319 + Fix ia64 assembler code
2320 [Andy Polyakov, Steve Henson]
2322 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
2324 *) DTLS Handshake overhaul. There were longstanding issues with
2325 OpenSSL DTLS implementation, which were making it impossible for
2326 RFC 4347 compliant client to communicate with OpenSSL server.
2327 Unfortunately just fixing these incompatibilities would "cut off"
2328 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
2329 server keeps tolerating non RFC compliant syntax. The opposite is
2330 not true, 0.9.8f client can not communicate with earlier server.
2331 This update even addresses CVE-2007-4995.
2334 *) Changes to avoid need for function casts in OpenSSL: some compilers
2335 (gcc 4.2 and later) reject their use.
2336 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
2339 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2340 RFC4507bis. The encrypted ticket format is an encrypted encoded
2341 SSL_SESSION structure, that way new session features are automatically
2344 If a client application caches session in an SSL_SESSION structure
2345 support is transparent because tickets are now stored in the encoded
2348 The SSL_CTX structure automatically generates keys for ticket
2349 protection in servers so again support should be possible
2350 with no application modification.
2352 If a client or server wishes to disable RFC4507 support then the option
2353 SSL_OP_NO_TICKET can be set.
2355 Add a TLS extension debugging callback to allow the contents of any client
2356 or server extensions to be examined.
2358 This work was sponsored by Google.
2361 *) Add initial support for TLS extensions, specifically for the server_name
2362 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2363 have new members for a host name. The SSL data structure has an
2364 additional member SSL_CTX *initial_ctx so that new sessions can be
2365 stored in that context to allow for session resumption, even after the
2366 SSL has been switched to a new SSL_CTX in reaction to a client's
2367 server_name extension.
2369 New functions (subject to change):
2371 SSL_get_servername()
2372 SSL_get_servername_type()
2375 New CTRL codes and macros (subject to change):
2377 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2378 - SSL_CTX_set_tlsext_servername_callback()
2379 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2380 - SSL_CTX_set_tlsext_servername_arg()
2381 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2383 openssl s_client has a new '-servername ...' option.
2385 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2386 '-key2 ...', '-servername_fatal' (subject to change). This allows
2387 testing the HostName extension for a specific single host name ('-cert'
2388 and '-key' remain fallbacks for handshakes without HostName
2389 negotiation). If the unrecogninzed_name alert has to be sent, this by
2390 default is a warning; it becomes fatal with the '-servername_fatal'
2393 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
2395 *) Add AES and SSE2 assembly language support to VC++ build.
2398 *) Mitigate attack on final subtraction in Montgomery reduction.
2401 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
2402 (which previously caused an internal error).
2405 *) Squeeze another 10% out of IGE mode when in != out.
2408 *) AES IGE mode speedup.
2409 [Dean Gaudet (Google)]
2411 *) Add the Korean symmetric 128-bit cipher SEED (see
2412 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
2413 add SEED ciphersuites from RFC 4162:
2415 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
2416 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
2417 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
2418 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
2420 To minimize changes between patchlevels in the OpenSSL 0.9.8
2421 series, SEED remains excluded from compilation unless OpenSSL
2422 is configured with 'enable-seed'.
2423 [KISA, Bodo Moeller]
2425 *) Mitigate branch prediction attacks, which can be practical if a
2426 single processor is shared, allowing a spy process to extract
2427 information. For detailed background information, see
2428 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
2429 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
2430 and Necessary Software Countermeasures"). The core of the change
2431 are new versions BN_div_no_branch() and
2432 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
2433 respectively, which are slower, but avoid the security-relevant
2434 conditional branches. These are automatically called by BN_div()
2435 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
2436 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
2437 remove a conditional branch.
2439 BN_FLG_CONSTTIME is the new name for the previous
2440 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
2441 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
2442 in the exponent causes BN_mod_exp_mont() to use the alternative
2443 implementation in BN_mod_exp_mont_consttime().) The old name
2444 remains as a deprecated alias.
2446 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
2447 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
2448 constant-time implementations for more than just exponentiation.
2449 Here too the old name is kept as a deprecated alias.
2451 BN_BLINDING_new() will now use BN_dup() for the modulus so that
2452 the BN_BLINDING structure gets an independent copy of the
2453 modulus. This means that the previous "BIGNUM *m" argument to
2454 BN_BLINDING_new() and to BN_BLINDING_create_param() now
2455 essentially becomes "const BIGNUM *m", although we can't actually
2456 change this in the header file before 0.9.9. It allows
2457 RSA_setup_blinding() to use BN_with_flags() on the modulus to
2458 enable BN_FLG_CONSTTIME.
2460 [Matthew D Wood (Intel Corp)]
2462 *) In the SSL/TLS server implementation, be strict about session ID
2463 context matching (which matters if an application uses a single
2464 external cache for different purposes). Previously,
2465 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
2466 set. This did ensure strict client verification, but meant that,
2467 with applications using a single external cache for quite
2468 different requirements, clients could circumvent ciphersuite
2469 restrictions for a given session ID context by starting a session
2470 in a different context.
2473 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2474 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2475 authentication-only ciphersuites.
2478 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
2479 not complete and could lead to a possible single byte overflow
2480 (CVE-2007-5135) [Ben Laurie]
2482 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
2484 *) Since AES128 and AES256 (and similarly Camellia128 and
2485 Camellia256) share a single mask bit in the logic of
2486 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2487 kludge to work properly if AES128 is available and AES256 isn't
2488 (or if Camellia128 is available and Camellia256 isn't).
2491 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
2492 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
2493 When a point or a seed is encoded in a BIT STRING, we need to
2494 prevent the removal of trailing zero bits to get the proper DER
2495 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
2496 of a NamedBitList, for which trailing 0 bits need to be removed.)
2499 *) Have SSL/TLS server implementation tolerate "mismatched" record
2500 protocol version while receiving ClientHello even if the
2501 ClientHello is fragmented. (The server can't insist on the
2502 particular protocol version it has chosen before the ServerHello
2503 message has informed the client about his choice.)
2506 *) Add RFC 3779 support.
2507 [Rob Austein for ARIN, Ben Laurie]
2509 *) Load error codes if they are not already present instead of using a
2510 static variable. This allows them to be cleanly unloaded and reloaded.
2511 Improve header file function name parsing.
2514 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
2515 or CAPABILITY handshake as required by RFCs.
2518 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
2520 *) Introduce limits to prevent malicious keys being able to
2521 cause a denial of service. (CVE-2006-2940)
2522 [Steve Henson, Bodo Moeller]
2524 *) Fix ASN.1 parsing of certain invalid structures that can result
2525 in a denial of service. (CVE-2006-2937) [Steve Henson]
2527 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2528 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2530 *) Fix SSL client code which could crash if connecting to a
2531 malicious SSLv2 server. (CVE-2006-4343)
2532 [Tavis Ormandy and Will Drewry, Google Security Team]
2534 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
2535 match only those. Before that, "AES256-SHA" would be interpreted
2536 as a pattern and match "AES128-SHA" too (since AES128-SHA got
2537 the same strength classification in 0.9.7h) as we currently only
2538 have a single AES bit in the ciphersuite description bitmap.
2539 That change, however, also applied to ciphersuite strings such as
2540 "RC4-MD5" that intentionally matched multiple ciphersuites --
2541 namely, SSL 2.0 ciphersuites in addition to the more common ones
2542 from SSL 3.0/TLS 1.0.
2544 So we change the selection algorithm again: Naming an explicit
2545 ciphersuite selects this one ciphersuite, and any other similar
2546 ciphersuite (same bitmap) from *other* protocol versions.
2547 Thus, "RC4-MD5" again will properly select both the SSL 2.0
2548 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
2550 Since SSL 2.0 does not have any ciphersuites for which the
2551 128/256 bit distinction would be relevant, this works for now.
2552 The proper fix will be to use different bits for AES128 and
2553 AES256, which would have avoided the problems from the beginning;
2554 however, bits are scarce, so we can only do this in a new release
2555 (not just a patchlevel) when we can change the SSL_CIPHER
2556 definition to split the single 'unsigned long mask' bitmap into
2557 multiple values to extend the available space.
2561 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
2563 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2564 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2566 *) Add AES IGE and biIGE modes.
2569 *) Change the Unix randomness entropy gathering to use poll() when
2570 possible instead of select(), since the latter has some
2571 undesirable limitations.
2572 [Darryl Miles via Richard Levitte and Bodo Moeller]
2574 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
2575 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
2576 cannot be implicitly activated as part of, e.g., the "AES" alias.
2577 However, please upgrade to OpenSSL 0.9.9[-dev] for
2578 non-experimental use of the ECC ciphersuites to get TLS extension
2579 support, which is required for curve and point format negotiation
2580 to avoid potential handshake problems.
2583 *) Disable rogue ciphersuites:
2585 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
2586 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
2587 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
2589 The latter two were purportedly from
2590 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
2593 Also deactivate the remaining ciphersuites from
2594 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
2595 unofficial, and the ID has long expired.
2598 *) Fix RSA blinding Heisenbug (problems sometimes occured on
2599 dual-core machines) and other potential thread-safety issues.
2602 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
2603 versions), which is now available for royalty-free use
2604 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
2605 Also, add Camellia TLS ciphersuites from RFC 4132.
2607 To minimize changes between patchlevels in the OpenSSL 0.9.8
2608 series, Camellia remains excluded from compilation unless OpenSSL
2609 is configured with 'enable-camellia'.
2612 *) Disable the padding bug check when compression is in use. The padding
2613 bug check assumes the first packet is of even length, this is not
2614 necessarily true if compresssion is enabled and can result in false
2615 positives causing handshake failure. The actual bug test is ancient
2616 code so it is hoped that implementations will either have fixed it by
2617 now or any which still have the bug do not support compression.
2620 Changes between 0.9.8a and 0.9.8b [04 May 2006]
2622 *) When applying a cipher rule check to see if string match is an explicit
2623 cipher suite and only match that one cipher suite if it is.
2626 *) Link in manifests for VC++ if needed.
2627 [Austin Ziegler <halostatue@gmail.com>]
2629 *) Update support for ECC-based TLS ciphersuites according to
2630 draft-ietf-tls-ecc-12.txt with proposed changes (but without
2631 TLS extensions, which are supported starting with the 0.9.9
2632 branch, not in the OpenSSL 0.9.8 branch).
2635 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
2636 opaque EVP_CIPHER_CTX handling.
2639 *) Fixes and enhancements to zlib compression code. We now only use
2640 "zlib1.dll" and use the default __cdecl calling convention on Win32
2641 to conform with the standards mentioned here:
2642 http://www.zlib.net/DLL_FAQ.txt
2643 Static zlib linking now works on Windows and the new --with-zlib-include
2644 --with-zlib-lib options to Configure can be used to supply the location
2645 of the headers and library. Gracefully handle case where zlib library
2649 *) Several fixes and enhancements to the OID generation code. The old code
2650 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
2651 handle numbers larger than ULONG_MAX, truncated printing and had a
2652 non standard OBJ_obj2txt() behaviour.
2655 *) Add support for building of engines under engine/ as shared libraries
2656 under VC++ build system.
2659 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
2660 Hopefully, we will not see any false combination of paths any more.
2663 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
2665 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2666 (part of SSL_OP_ALL). This option used to disable the
2667 countermeasure against man-in-the-middle protocol-version
2668 rollback in the SSL 2.0 server implementation, which is a bad
2669 idea. (CVE-2005-2969)
2671 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2672 for Information Security, National Institute of Advanced Industrial
2673 Science and Technology [AIST], Japan)]
2675 *) Add two function to clear and return the verify parameter flags.
2678 *) Keep cipherlists sorted in the source instead of sorting them at
2679 runtime, thus removing the need for a lock.
2682 *) Avoid some small subgroup attacks in Diffie-Hellman.
2683 [Nick Mathewson and Ben Laurie]
2685 *) Add functions for well-known primes.
2688 *) Extended Windows CE support.
2689 [Satoshi Nakamura and Andy Polyakov]
2691 *) Initialize SSL_METHOD structures at compile time instead of during
2692 runtime, thus removing the need for a lock.
2695 *) Make PKCS7_decrypt() work even if no certificate is supplied by
2696 attempting to decrypt each encrypted key in turn. Add support to
2700 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
2702 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
2705 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
2708 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
2709 key into the same file any more.
2712 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
2715 *) Add -utf8 command line and config file option to 'ca'.
2716 [Stefan <stf@udoma.org]
2718 *) Removed the macro des_crypt(), as it seems to conflict with some
2719 libraries. Use DES_crypt().
2722 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
2723 involves renaming the source and generated shared-libs for
2724 both. The engines will accept the corrected or legacy ids
2725 ('ncipher' and '4758_cca' respectively) when binding. NB,
2726 this only applies when building 'shared'.
2727 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
2729 *) Add attribute functions to EVP_PKEY structure. Modify
2730 PKCS12_create() to recognize a CSP name attribute and
2731 use it. Make -CSP option work again in pkcs12 utility.
2734 *) Add new functionality to the bn blinding code:
2735 - automatic re-creation of the BN_BLINDING parameters after
2736 a fixed number of uses (currently 32)
2737 - add new function for parameter creation
2738 - introduce flags to control the update behaviour of the
2739 BN_BLINDING parameters
2740 - hide BN_BLINDING structure
2741 Add a second BN_BLINDING slot to the RSA structure to improve
2742 performance when a single RSA object is shared among several
2746 *) Add support for DTLS.
2747 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
2749 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
2750 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
2753 *) Remove buggy and incompletet DH cert support from
2754 ssl/ssl_rsa.c and ssl/s3_both.c
2757 *) Use SHA-1 instead of MD5 as the default digest algorithm for
2758 the apps/openssl applications.
2761 *) Compile clean with "-Wall -Wmissing-prototypes
2762 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
2763 DEBUG_SAFESTACK must also be set.
2766 *) Change ./Configure so that certain algorithms can be disabled by default.
2767 The new counterpiece to "no-xxx" is "enable-xxx".
2769 The patented RC5 and MDC2 algorithms will now be disabled unless
2770 "enable-rc5" and "enable-mdc2", respectively, are specified.
2772 (IDEA remains enabled despite being patented. This is because IDEA
2773 is frequently required for interoperability, and there is no license
2774 fee for non-commercial use. As before, "no-idea" can be used to
2775 avoid this algorithm.)
2779 *) Add processing of proxy certificates (see RFC 3820). This work was
2780 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
2781 EGEE (Enabling Grids for E-science in Europe).
2784 *) RC4 performance overhaul on modern architectures/implementations, such
2785 as Intel P4, IA-64 and AMD64.
2788 *) New utility extract-section.pl. This can be used specify an alternative
2789 section number in a pod file instead of having to treat each file as
2790 a separate case in Makefile. This can be done by adding two lines to the
2793 =for comment openssl_section:XXX
2795 The blank line is mandatory.
2799 *) New arguments -certform, -keyform and -pass for s_client and s_server
2800 to allow alternative format key and certificate files and passphrase
2804 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
2805 update associated structures and add various utility functions.
2807 Add new policy related verify parameters, include policy checking in
2808 standard verify code. Enhance 'smime' application with extra parameters
2809 to support policy checking and print out.
2812 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
2813 Nehemiah processors. These extensions support AES encryption in hardware
2814 as well as RNG (though RNG support is currently disabled).
2815 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
2817 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
2820 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
2821 [Andy Polyakov and a number of other people]
2823 *) Improved PowerPC platform support. Most notably BIGNUM assembler
2824 implementation contributed by IBM.
2825 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
2827 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
2828 exponent rather than 'unsigned long'. There is a corresponding change to
2829 the new 'rsa_keygen' element of the RSA_METHOD structure.
2830 [Jelte Jansen, Geoff Thorpe]
2832 *) Functionality for creating the initial serial number file is now
2833 moved from CA.pl to the 'ca' utility with a new option -create_serial.
2835 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
2836 number file to 1, which is bound to cause problems. To avoid
2837 the problems while respecting compatibility between different 0.9.7
2838 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
2839 CA.pl for serial number initialization. With the new release 0.9.8,
2840 we can fix the problem directly in the 'ca' utility.)
2843 *) Reduced header interdepencies by declaring more opaque objects in
2844 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
2845 give fewer recursive includes, which could break lazy source code - so
2846 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
2847 developers should define this symbol when building and using openssl to
2848 ensure they track the recommended behaviour, interfaces, [etc], but
2849 backwards-compatible behaviour prevails when this isn't defined.
2852 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
2855 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
2856 This will generate a random key of the appropriate length based on the
2857 cipher context. The EVP_CIPHER can provide its own random key generation
2858 routine to support keys of a specific form. This is used in the des and
2859 3des routines to generate a key of the correct parity. Update S/MIME
2860 code to use new functions and hence generate correct parity DES keys.
2861 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
2862 valid (weak or incorrect parity).
2865 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
2866 as looking them up. This is useful when the verified structure may contain
2867 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
2868 present unless the new PKCS7_NO_CRL flag is asserted.
2871 *) Extend ASN1 oid configuration module. It now additionally accepts the
2874 shortName = some long name, 1.2.3.4
2877 *) Reimplemented the BN_CTX implementation. There is now no more static
2878 limitation on the number of variables it can handle nor the depth of the
2879 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
2880 information can now expand as required, and rather than having a single
2881 static array of bignums, BN_CTX now uses a linked-list of such arrays
2882 allowing it to expand on demand whilst maintaining the usefulness of
2883 BN_CTX's "bundling".
2886 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
2887 to allow all RSA operations to function using a single BN_CTX.
2890 *) Preliminary support for certificate policy evaluation and checking. This
2891 is initially intended to pass the tests outlined in "Conformance Testing
2892 of Relying Party Client Certificate Path Processing Logic" v1.07.
2895 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
2896 remained unused and not that useful. A variety of other little bignum
2897 tweaks and fixes have also been made continuing on from the audit (see
2901 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
2902 associated ASN1, EVP and SSL functions and old ASN1 macros.
2905 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
2906 and this should never fail. So the return value from the use of
2907 BN_set_word() (which can fail due to needless expansion) is now deprecated;
2908 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
2911 *) BN_CTX_get() should return zero-valued bignums, providing the same
2912 initialised value as BN_new().
2913 [Geoff Thorpe, suggested by Ulf Möller]
2915 *) Support for inhibitAnyPolicy certificate extension.
2918 *) An audit of the BIGNUM code is underway, for which debugging code is
2919 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2920 is considered valid when processing BIGNUMs, and causes execution to
2921 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2922 further steps are taken to deliberately pollute unused data in BIGNUM
2923 structures to try and expose faulty code further on. For now, openssl will
2924 (in its default mode of operation) continue to tolerate the inconsistent
2925 forms that it has tolerated in the past, but authors and packagers should
2926 consider trying openssl and their own applications when compiled with
2927 these debugging symbols defined. It will help highlight potential bugs in
2928 their own code, and will improve the test coverage for OpenSSL itself. At
2929 some point, these tighter rules will become openssl's default to improve
2930 maintainability, though the assert()s and other overheads will remain only
2931 in debugging configurations. See bn.h for more details.
2932 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2934 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2935 that can only be obtained through BN_CTX_new() (which implicitly
2936 initialises it). The presence of this function only made it possible
2937 to overwrite an existing structure (and cause memory leaks).
2940 *) Because of the callback-based approach for implementing LHASH as a
2941 template type, lh_insert() adds opaque objects to hash-tables and
2942 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2943 to clean up those corresponding objects before destroying the hash table
2944 (and losing the object pointers). So some over-zealous constifications in
2945 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2946 objects as "const" and the lh_doall[_arg] callback wrappers are not
2947 prototyped to have "const" restrictions on the object pointers they are
2948 given (and so aren't required to cast them away any more).
2951 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2952 (speed) prefers to use its own implementation. The two implementations
2953 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2954 its object type properly exposed (MS_TM) instead of casting to/from "char
2955 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2956 aren't necessarily the greatest nomenclatures - but this is what was used
2957 internally to the implementation so I've used that for now.
2960 *) Ensure that deprecated functions do not get compiled when
2961 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2962 the self-tests were still using deprecated key-generation functions so
2963 these have been updated also.
2966 *) Reorganise PKCS#7 code to separate the digest location functionality
2967 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2968 New function PKCS7_set_digest() to set the digest type for PKCS#7
2969 digestedData type. Add additional code to correctly generate the
2970 digestedData type and add support for this type in PKCS7 initialization
2974 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2975 structure of type "other".
2978 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2979 sure the loop does correctly stop and breaking ("division by zero")
2980 modulus operations are not performed. The (pre-generated) prime
2981 table crypto/bn/bn_prime.h was already correct, but it could not be
2982 re-generated on some platforms because of the "division by zero"
2983 situation in the script.
2984 [Ralf S. Engelschall]
2986 *) Update support for ECC-based TLS ciphersuites according to
2987 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2988 SHA-1 now is only used for "small" curves (where the
2989 representation of a field element takes up to 24 bytes); for
2990 larger curves, the field element resulting from ECDH is directly
2991 used as premaster secret.
2992 [Douglas Stebila (Sun Microsystems Laboratories)]
2994 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2995 curve secp160r1 to the tests.
2996 [Douglas Stebila (Sun Microsystems Laboratories)]
2998 *) Add the possibility to load symbols globally with DSO.
2999 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
3001 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
3002 control of the error stack.
3005 *) Add support for STORE in ENGINE.
3008 *) Add the STORE type. The intention is to provide a common interface
3009 to certificate and key stores, be they simple file-based stores, or
3010 HSM-type store, or LDAP stores, or...
3011 NOTE: The code is currently UNTESTED and isn't really used anywhere.
3014 *) Add a generic structure called OPENSSL_ITEM. This can be used to
3015 pass a list of arguments to any function as well as provide a way
3016 for a function to pass data back to the caller.
3019 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
3020 works like BUF_strdup() but can be used to duplicate a portion of
3021 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
3025 *) Add the function sk_find_ex() which works like sk_find(), but will
3026 return an index to an element even if an exact match couldn't be
3027 found. The index is guaranteed to point at the element where the
3028 searched-for key would be inserted to preserve sorting order.
3031 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
3032 takes an extra flags argument for optional functionality. Currently,
3033 the following flags are defined:
3035 OBJ_BSEARCH_VALUE_ON_NOMATCH
3036 This one gets OBJ_bsearch_ex() to return a pointer to the first
3037 element where the comparing function returns a negative or zero
3040 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
3041 This one gets OBJ_bsearch_ex() to return a pointer to the first
3042 element where the comparing function returns zero. This is useful
3043 if there are more than one element where the comparing function
3047 *) Make it possible to create self-signed certificates with 'openssl ca'
3048 in such a way that the self-signed certificate becomes part of the
3049 CA database and uses the same mechanisms for serial number generation
3050 as all other certificate signing. The new flag '-selfsign' enables
3051 this functionality. Adapt CA.sh and CA.pl.in.
3054 *) Add functionality to check the public key of a certificate request
3055 against a given private. This is useful to check that a certificate
3056 request can be signed by that key (self-signing).
3059 *) Make it possible to have multiple active certificates with the same
3060 subject in the CA index file. This is done only if the keyword
3061 'unique_subject' is set to 'no' in the main CA section (default
3062 if 'CA_default') of the configuration file. The value is saved
3063 with the database itself in a separate index attribute file,
3064 named like the index file with '.attr' appended to the name.
3067 *) Generate muti valued AVAs using '+' notation in config files for
3071 *) Support for nameConstraints certificate extension.
3074 *) Support for policyConstraints certificate extension.
3077 *) Support for policyMappings certificate extension.
3080 *) Make sure the default DSA_METHOD implementation only uses its
3081 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
3082 and change its own handlers to be NULL so as to remove unnecessary
3083 indirection. This lets alternative implementations fallback to the
3084 default implementation more easily.
3087 *) Support for directoryName in GeneralName related extensions
3091 *) Make it possible to link applications using Makefile.shared.
3092 Make that possible even when linking against static libraries!
3095 *) Support for single pass processing for S/MIME signing. This now
3096 means that S/MIME signing can be done from a pipe, in addition
3097 cleartext signing (multipart/signed type) is effectively streaming
3098 and the signed data does not need to be all held in memory.
3100 This is done with a new flag PKCS7_STREAM. When this flag is set
3101 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
3102 is done after the data is output (and digests calculated) in
3103 SMIME_write_PKCS7().
3106 *) Add full support for -rpath/-R, both in shared libraries and
3107 applications, at least on the platforms where it's known how
3111 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
3112 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
3113 will now compute a table of multiples of the generator that
3114 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
3115 faster (notably in the case of a single point multiplication,
3116 scalar * generator).
3117 [Nils Larsch, Bodo Moeller]
3119 *) IPv6 support for certificate extensions. The various extensions
3120 which use the IP:a.b.c.d can now take IPv6 addresses using the
3121 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
3125 *) Added an ENGINE that implements RSA by performing private key
3126 exponentiations with the GMP library. The conversions to and from
3127 GMP's mpz_t format aren't optimised nor are any montgomery forms
3128 cached, and on x86 it appears OpenSSL's own performance has caught up.
3129 However there are likely to be other architectures where GMP could
3130 provide a boost. This ENGINE is not built in by default, but it can be
3131 specified at Configure time and should be accompanied by the necessary
3132 linker additions, eg;
3133 ./config -DOPENSSL_USE_GMP -lgmp
3136 *) "openssl engine" will not display ENGINE/DSO load failure errors when
3137 testing availability of engines with "-t" - the old behaviour is
3138 produced by increasing the feature's verbosity with "-tt".
3141 *) ECDSA routines: under certain error conditions uninitialized BN objects
3142 could be freed. Solution: make sure initialization is performed early
3143 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
3147 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
3148 and DH_METHOD (eg. by ENGINE implementations) to override the normal
3149 software implementations. For DSA and DH, parameter generation can
3150 also be overriden by providing the appropriate method callbacks.
3153 *) Change the "progress" mechanism used in key-generation and
3154 primality testing to functions that take a new BN_GENCB pointer in
3155 place of callback/argument pairs. The new API functions have "_ex"
3156 postfixes and the older functions are reimplemented as wrappers for
3157 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
3158 declarations of the old functions to help (graceful) attempts to
3159 migrate to the new functions. Also, the new key-generation API
3160 functions operate on a caller-supplied key-structure and return
3161 success/failure rather than returning a key or NULL - this is to
3162 help make "keygen" another member function of RSA_METHOD etc.
3164 Example for using the new callback interface:
3166 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
3170 BN_GENCB_set(&my_cb, my_callback, my_arg);
3172 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
3173 /* For the meaning of a, b in calls to my_callback(), see the
3174 * documentation of the function that calls the callback.
3175 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
3176 * my_callback should return 1 if it wants BN_is_prime_ex()
3177 * to continue, or 0 to stop.
3182 *) Change the ZLIB compression method to be stateful, and make it
3183 available to TLS with the number defined in
3184 draft-ietf-tls-compression-04.txt.
3187 *) Add the ASN.1 structures and functions for CertificatePair, which
3188 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
3190 CertificatePair ::= SEQUENCE {
3191 forward [0] Certificate OPTIONAL,
3192 reverse [1] Certificate OPTIONAL,
3193 -- at least one of the pair shall be present -- }
3195 Also implement the PEM functions to read and write certificate
3196 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
3198 This needed to be defined, mostly for the sake of the LDAP
3199 attribute crossCertificatePair, but may prove useful elsewhere as
3203 *) Make it possible to inhibit symlinking of shared libraries in
3204 Makefile.shared, for Cygwin's sake.
3207 *) Extend the BIGNUM API by creating a function
3208 void BN_set_negative(BIGNUM *a, int neg);
3209 and a macro that behave like
3210 int BN_is_negative(const BIGNUM *a);
3212 to avoid the need to access 'a->neg' directly in applications.
3215 *) Implement fast modular reduction for pseudo-Mersenne primes
3216 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
3217 EC_GROUP_new_curve_GFp() will now automatically use this
3219 [Nils Larsch <nla@trustcenter.de>]
3221 *) Add new lock type (CRYPTO_LOCK_BN).
3224 *) Change the ENGINE framework to automatically load engines
3225 dynamically from specific directories unless they could be
3226 found to already be built in or loaded. Move all the
3227 current engines except for the cryptodev one to a new
3229 The engines in engines/ are built as shared libraries if
3230 the "shared" options was given to ./Configure or ./config.
3231 Otherwise, they are inserted in libcrypto.a.
3232 /usr/local/ssl/engines is the default directory for dynamic
3233 engines, but that can be overriden at configure time through
3234 the usual use of --prefix and/or --openssldir, and at run
3235 time with the environment variable OPENSSL_ENGINES.
3236 [Geoff Thorpe and Richard Levitte]
3238 *) Add Makefile.shared, a helper makefile to build shared
3239 libraries. Addapt Makefile.org.
3242 *) Add version info to Win32 DLLs.
3243 [Peter 'Luna' Runestig" <peter@runestig.com>]
3245 *) Add new 'medium level' PKCS#12 API. Certificates and keys
3246 can be added using this API to created arbitrary PKCS#12
3247 files while avoiding the low level API.
3249 New options to PKCS12_create(), key or cert can be NULL and
3250 will then be omitted from the output file. The encryption
3251 algorithm NIDs can be set to -1 for no encryption, the mac
3252 iteration count can be set to 0 to omit the mac.
3254 Enhance pkcs12 utility by making the -nokeys and -nocerts
3255 options work when creating a PKCS#12 file. New option -nomac
3256 to omit the mac, NONE can be set for an encryption algorithm.
3257 New code is modified to use the enhanced PKCS12_create()
3258 instead of the low level API.
3261 *) Extend ASN1 encoder to support indefinite length constructed
3262 encoding. This can output sequences tags and octet strings in
3263 this form. Modify pk7_asn1.c to support indefinite length
3264 encoding. This is experimental and needs additional code to
3265 be useful, such as an ASN1 bio and some enhanced streaming
3268 Extend template encode functionality so that tagging is passed
3269 down to the template encoder.
3272 *) Let 'openssl req' fail if an argument to '-newkey' is not
3273 recognized instead of using RSA as a default.
3276 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
3277 As these are not official, they are not included in "ALL";
3278 the "ECCdraft" ciphersuite group alias can be used to select them.
3279 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
3281 *) Add ECDH engine support.
3282 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
3284 *) Add ECDH in new directory crypto/ecdh/.
3285 [Douglas Stebila (Sun Microsystems Laboratories)]
3287 *) Let BN_rand_range() abort with an error after 100 iterations
3288 without success (which indicates a broken PRNG).
3291 *) Change BN_mod_sqrt() so that it verifies that the input value
3292 is really the square of the return value. (Previously,
3293 BN_mod_sqrt would show GIGO behaviour.)
3296 *) Add named elliptic curves over binary fields from X9.62, SECG,
3297 and WAP/WTLS; add OIDs that were still missing.
3299 [Sheueling Chang Shantz and Douglas Stebila
3300 (Sun Microsystems Laboratories)]
3302 *) Extend the EC library for elliptic curves over binary fields
3303 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
3306 EC_GF2m_simple_method
3310 EC_GROUP_new_curve_GF2m
3311 EC_GROUP_set_curve_GF2m
3312 EC_GROUP_get_curve_GF2m
3313 EC_POINT_set_affine_coordinates_GF2m
3314 EC_POINT_get_affine_coordinates_GF2m
3315 EC_POINT_set_compressed_coordinates_GF2m
3317 Point compression for binary fields is disabled by default for
3318 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
3321 As binary polynomials are represented as BIGNUMs, various members
3322 of the EC_GROUP and EC_POINT data structures can be shared
3323 between the implementations for prime fields and binary fields;
3324 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
3325 are essentially identical to their ..._GFp counterparts.
3326 (For simplicity, the '..._GFp' prefix has been dropped from
3327 various internal method names.)
3329 An internal 'field_div' method (similar to 'field_mul' and
3330 'field_sqr') has been added; this is used only for binary fields.
3332 [Sheueling Chang Shantz and Douglas Stebila
3333 (Sun Microsystems Laboratories)]
3335 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
3336 through methods ('mul', 'precompute_mult').
3338 The generic implementations (now internally called 'ec_wNAF_mul'
3339 and 'ec_wNAF_precomputed_mult') remain the default if these
3340 methods are undefined.
3342 [Sheueling Chang Shantz and Douglas Stebila
3343 (Sun Microsystems Laboratories)]
3345 *) New function EC_GROUP_get_degree, which is defined through
3346 EC_METHOD. For curves over prime fields, this returns the bit
3347 length of the modulus.
3349 [Sheueling Chang Shantz and Douglas Stebila
3350 (Sun Microsystems Laboratories)]
3352 *) New functions EC_GROUP_dup, EC_POINT_dup.
3353 (These simply call ..._new and ..._copy).
3355 [Sheueling Chang Shantz and Douglas Stebila
3356 (Sun Microsystems Laboratories)]
3358 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
3359 Polynomials are represented as BIGNUMs (where the sign bit is not
3360 used) in the following functions [macros]:
3363 BN_GF2m_sub [= BN_GF2m_add]
3364 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
3365 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
3366 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
3368 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
3369 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
3370 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
3371 BN_GF2m_cmp [= BN_ucmp]
3373 (Note that only the 'mod' functions are actually for fields GF(2^m).
3374 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
3376 For some functions, an the irreducible polynomial defining a
3377 field can be given as an 'unsigned int[]' with strictly
3378 decreasing elements giving the indices of those bits that are set;
3379 i.e., p[] represents the polynomial
3380 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
3382 p[0] > p[1] > ... > p[k] = 0.
3383 This applies to the following functions:
3388 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
3389 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
3391 BN_GF2m_mod_sqrt_arr
3392 BN_GF2m_mod_solve_quad_arr
3396 Conversion can be performed by the following functions:
3401 bntest.c has additional tests for binary polynomial arithmetic.
3403 Two implementations for BN_GF2m_mod_div() are available.
3404 The default algorithm simply uses BN_GF2m_mod_inv() and
3405 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
3406 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
3407 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
3409 [Sheueling Chang Shantz and Douglas Stebila
3410 (Sun Microsystems Laboratories)]
3412 *) Add new error code 'ERR_R_DISABLED' that can be used when some
3413 functionality is disabled at compile-time.
3414 [Douglas Stebila <douglas.stebila@sun.com>]
3416 *) Change default behaviour of 'openssl asn1parse' so that more
3417 information is visible when viewing, e.g., a certificate:
3419 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
3420 mode the content of non-printable OCTET STRINGs is output in a
3421 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
3422 avoid the appearance of a printable string.
3423 [Nils Larsch <nla@trustcenter.de>]
3425 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
3427 EC_GROUP_set_asn1_flag()
3428 EC_GROUP_get_asn1_flag()
3429 EC_GROUP_set_point_conversion_form()
3430 EC_GROUP_get_point_conversion_form()
3431 These control ASN1 encoding details:
3432 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
3433 has been set to OPENSSL_EC_NAMED_CURVE.
3434 - Points are encoded in uncompressed form by default; options for
3435 asn1_for are as for point2oct, namely
3436 POINT_CONVERSION_COMPRESSED
3437 POINT_CONVERSION_UNCOMPRESSED
3438 POINT_CONVERSION_HYBRID
3440 Also add 'seed' and 'seed_len' members to EC_GROUP with access
3443 EC_GROUP_get0_seed()
3444 EC_GROUP_get_seed_len()
3445 This is used only for ASN1 purposes (so far).
3446 [Nils Larsch <nla@trustcenter.de>]
3448 *) Add 'field_type' member to EC_METHOD, which holds the NID
3449 of the appropriate field type OID. The new function
3450 EC_METHOD_get_field_type() returns this value.
3451 [Nils Larsch <nla@trustcenter.de>]
3456 EC_POINT_point2hex()
3457 EC_POINT_hex2point()
3458 providing useful interfaces to EC_POINT_point2oct() and
3459 EC_POINT_oct2point().
3460 [Nils Larsch <nla@trustcenter.de>]
3462 *) Change internals of the EC library so that the functions
3463 EC_GROUP_set_generator()
3464 EC_GROUP_get_generator()
3465 EC_GROUP_get_order()
3466 EC_GROUP_get_cofactor()
3467 are implemented directly in crypto/ec/ec_lib.c and not dispatched
3468 to methods, which would lead to unnecessary code duplication when
3469 adding different types of curves.
3470 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
3472 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
3473 arithmetic, and such that modified wNAFs are generated
3474 (which avoid length expansion in many cases).
3477 *) Add a function EC_GROUP_check_discriminant() (defined via
3478 EC_METHOD) that verifies that the curve discriminant is non-zero.
3480 Add a function EC_GROUP_check() that makes some sanity tests
3481 on a EC_GROUP, its generator and order. This includes
3482 EC_GROUP_check_discriminant().
3483 [Nils Larsch <nla@trustcenter.de>]
3485 *) Add ECDSA in new directory crypto/ecdsa/.
3487 Add applications 'openssl ecparam' and 'openssl ecdsa'
3488 (these are based on 'openssl dsaparam' and 'openssl dsa').
3490 ECDSA support is also included in various other files across the
3491 library. Most notably,
3492 - 'openssl req' now has a '-newkey ecdsa:file' option;
3493 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
3494 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
3495 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
3496 them suitable for ECDSA where domain parameters must be
3497 extracted before the specific public key;
3498 - ECDSA engine support has been added.
3499 [Nils Larsch <nla@trustcenter.de>]
3501 *) Include some named elliptic curves, and add OIDs from X9.62,
3502 SECG, and WAP/WTLS. Each curve can be obtained from the new
3504 EC_GROUP_new_by_curve_name(),
3505 and the list of available named curves can be obtained with
3506 EC_get_builtin_curves().
3507 Also add a 'curve_name' member to EC_GROUP objects, which can be
3509 EC_GROUP_set_curve_name()
3510 EC_GROUP_get_curve_name()
3511 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
3513 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
3514 was actually never needed) and in BN_mul(). The removal in BN_mul()
3515 required a small change in bn_mul_part_recursive() and the addition
3516 of the functions bn_cmp_part_words(), bn_sub_part_words() and
3517 bn_add_part_words(), which do the same thing as bn_cmp_words(),
3518 bn_sub_words() and bn_add_words() except they take arrays with
3522 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
3524 *) Cleanse PEM buffers before freeing them since they may contain
3526 [Benjamin Bennett <ben@psc.edu>]
3528 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3529 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3530 authentication-only ciphersuites.
3533 *) Since AES128 and AES256 share a single mask bit in the logic of
3534 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3535 kludge to work properly if AES128 is available and AES256 isn't.
3538 *) Expand security boundary to match 1.1.1 module.
3541 *) Remove redundant features: hash file source, editing of test vectors
3542 modify fipsld to use external fips_premain.c signature.
3545 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
3546 run algorithm test programs.
3549 *) Make algorithm test programs more tolerant of whitespace.
3552 *) Have SSL/TLS server implementation tolerate "mismatched" record
3553 protocol version while receiving ClientHello even if the
3554 ClientHello is fragmented. (The server can't insist on the
3555 particular protocol version it has chosen before the ServerHello
3556 message has informed the client about his choice.)
3559 *) Load error codes if they are not already present instead of using a
3560 static variable. This allows them to be cleanly unloaded and reloaded.
3563 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
3565 *) Introduce limits to prevent malicious keys being able to
3566 cause a denial of service. (CVE-2006-2940)
3567 [Steve Henson, Bodo Moeller]
3569 *) Fix ASN.1 parsing of certain invalid structures that can result
3570 in a denial of service. (CVE-2006-2937) [Steve Henson]
3572 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3573 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3575 *) Fix SSL client code which could crash if connecting to a
3576 malicious SSLv2 server. (CVE-2006-4343)
3577 [Tavis Ormandy and Will Drewry, Google Security Team]
3579 *) Change ciphersuite string processing so that an explicit
3580 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
3581 will no longer include "AES128-SHA"), and any other similar
3582 ciphersuite (same bitmap) from *other* protocol versions (so that
3583 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
3584 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
3585 changes from 0.9.8b and 0.9.8d.
3588 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
3590 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3591 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3593 *) Change the Unix randomness entropy gathering to use poll() when
3594 possible instead of select(), since the latter has some
3595 undesirable limitations.
3596 [Darryl Miles via Richard Levitte and Bodo Moeller]
3598 *) Disable rogue ciphersuites:
3600 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3601 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3602 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3604 The latter two were purportedly from
3605 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3608 Also deactive the remaining ciphersuites from
3609 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3610 unofficial, and the ID has long expired.
3613 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3614 dual-core machines) and other potential thread-safety issues.
3617 Changes between 0.9.7i and 0.9.7j [04 May 2006]
3619 *) Adapt fipsld and the build system to link against the validated FIPS
3620 module in FIPS mode.
3623 *) Fixes for VC++ 2005 build under Windows.
3626 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
3627 from a Windows bash shell such as MSYS. It is autodetected from the
3628 "config" script when run from a VC++ environment. Modify standard VC++
3629 build to use fipscanister.o from the GNU make build.
3632 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
3634 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
3635 The value now differs depending on if you build for FIPS or not.
3636 BEWARE! A program linked with a shared FIPSed libcrypto can't be
3637 safely run with a non-FIPSed libcrypto, as it may crash because of
3638 the difference induced by this change.
3641 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
3643 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3644 (part of SSL_OP_ALL). This option used to disable the
3645 countermeasure against man-in-the-middle protocol-version
3646 rollback in the SSL 2.0 server implementation, which is a bad
3647 idea. (CVE-2005-2969)
3649 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3650 for Information Security, National Institute of Advanced Industrial
3651 Science and Technology [AIST], Japan)]
3653 *) Minimal support for X9.31 signatures and PSS padding modes. This is
3654 mainly for FIPS compliance and not fully integrated at this stage.
3657 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
3658 the exponentiation using a fixed-length exponent. (Otherwise,
3659 the information leaked through timing could expose the secret key
3660 after many signatures; cf. Bleichenbacher's attack on DSA with
3664 *) Make a new fixed-window mod_exp implementation the default for
3665 RSA, DSA, and DH private-key operations so that the sequence of
3666 squares and multiplies and the memory access pattern are
3667 independent of the particular secret key. This will mitigate
3668 cache-timing and potential related attacks.
3670 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
3671 and this is automatically used by BN_mod_exp_mont() if the new flag
3672 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
3673 will use this BN flag for private exponents unless the flag
3674 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
3675 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
3677 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
3679 *) Change the client implementation for SSLv23_method() and
3680 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
3681 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
3682 (Previously, the SSL 2.0 backwards compatible Client Hello
3683 message format would be used even with SSL_OP_NO_SSLv2.)
3686 *) Add support for smime-type MIME parameter in S/MIME messages which some
3690 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
3691 a threadsafe manner. Modify rsa code to use new function and add calls
3692 to dsa and dh code (which had race conditions before).
3695 *) Include the fixed error library code in the C error file definitions
3696 instead of fixing them up at runtime. This keeps the error code
3697 structures constant.
3700 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
3702 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
3705 *) Fixes for newer kerberos headers. NB: the casts are needed because
3706 the 'length' field is signed on one version and unsigned on another
3707 with no (?) obvious way to tell the difference, without these VC++
3708 complains. Also the "definition" of FAR (blank) is no longer included
3709 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
3710 some needed definitions.
3713 *) Undo Cygwin change.
3716 *) Added support for proxy certificates according to RFC 3820.
3717 Because they may be a security thread to unaware applications,
3718 they must be explicitely allowed in run-time. See
3719 docs/HOWTO/proxy_certificates.txt for further information.
3722 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
3724 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
3725 server and client random values. Previously
3726 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
3727 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
3729 This change has negligible security impact because:
3731 1. Server and client random values still have 24 bytes of pseudo random
3734 2. Server and client random values are sent in the clear in the initial
3737 3. The master secret is derived using the premaster secret (48 bytes in
3738 size for static RSA ciphersuites) as well as client server and random
3741 The OpenSSL team would like to thank the UK NISCC for bringing this issue
3744 [Stephen Henson, reported by UK NISCC]
3746 *) Use Windows randomness collection on Cygwin.
3749 *) Fix hang in EGD/PRNGD query when communication socket is closed
3750 prematurely by EGD/PRNGD.
3751 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
3753 *) Prompt for pass phrases when appropriate for PKCS12 input format.
3756 *) Back-port of selected performance improvements from development
3757 branch, as well as improved support for PowerPC platforms.
3760 *) Add lots of checks for memory allocation failure, error codes to indicate
3761 failure and freeing up memory if a failure occurs.
3762 [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
3764 *) Add new -passin argument to dgst.
3767 *) Perform some character comparisons of different types in X509_NAME_cmp:
3768 this is needed for some certificates that reencode DNs into UTF8Strings
3769 (in violation of RFC3280) and can't or wont issue name rollover
3773 *) Make an explicit check during certificate validation to see that
3774 the CA setting in each certificate on the chain is correct. As a
3775 side effect always do the following basic checks on extensions,
3776 not just when there's an associated purpose to the check:
3778 - if there is an unhandled critical extension (unless the user
3779 has chosen to ignore this fault)
3780 - if the path length has been exceeded (if one is set at all)
3781 - that certain extensions fit the associated purpose (if one has
3785 Changes between 0.9.7d and 0.9.7e [25 Oct 2004]
3787 *) Avoid a race condition when CRLs are checked in a multi threaded
3788 environment. This would happen due to the reordering of the revoked
3789 entries during signature checking and serial number lookup. Now the
3790 encoding is cached and the serial number sort performed under a lock.
3791 Add new STACK function sk_is_sorted().
3794 *) Add Delta CRL to the extension code.
3797 *) Various fixes to s3_pkt.c so alerts are sent properly.
3798 [David Holmes <d.holmes@f5.com>]
3800 *) Reduce the chances of duplicate issuer name and serial numbers (in
3801 violation of RFC3280) using the OpenSSL certificate creation utilities.
3802 This is done by creating a random 64 bit value for the initial serial
3803 number when a serial number file is created or when a self signed
3804 certificate is created using 'openssl req -x509'. The initial serial
3805 number file is created using 'openssl x509 -next_serial' in CA.pl
3806 rather than being initialized to 1.
3809 Changes between 0.9.7c and 0.9.7d [17 Mar 2004]
3811 *) Fix null-pointer assignment in do_change_cipher_spec() revealed
3812 by using the Codenomicon TLS Test Tool (CVE-2004-0079)
3813 [Joe Orton, Steve Henson]
3815 *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
3817 [Joe Orton, Steve Henson]
3819 *) Make it possible to have multiple active certificates with the same
3820 subject in the CA index file. This is done only if the keyword
3821 'unique_subject' is set to 'no' in the main CA section (default
3822 if 'CA_default') of the configuration file. The value is saved
3823 with the database itself in a separate index attribute file,
3824 named like the index file with '.attr' appended to the name.
3827 *) X509 verify fixes. Disable broken certificate workarounds when
3828 X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
3829 keyUsage extension present. Don't accept CRLs with unhandled critical
3830 extensions: since verify currently doesn't process CRL extensions this
3831 rejects a CRL with *any* critical extensions. Add new verify error codes
3835 *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
3836 A clarification of RFC2560 will require the use of OCTET STRINGs and
3837 some implementations cannot handle the current raw format. Since OpenSSL
3838 copies and compares OCSP nonces as opaque blobs without any attempt at
3839 parsing them this should not create any compatibility issues.
3842 *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
3843 calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
3844 this HMAC (and other) operations are several times slower than OpenSSL
3848 *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
3849 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3851 *) Use the correct content when signing type "other".
3854 Changes between 0.9.7b and 0.9.7c [30 Sep 2003]
3856 *) Fix various bugs revealed by running the NISCC test suite:
3858 Stop out of bounds reads in the ASN1 code when presented with
3859 invalid tags (CVE-2003-0543 and CVE-2003-0544).
3861 Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
3863 If verify callback ignores invalid public key errors don't try to check
3864 certificate signature with the NULL public key.
3868 *) New -ignore_err option in ocsp application to stop the server
3869 exiting on the first error in a request.
3872 *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
3873 if the server requested one: as stated in TLS 1.0 and SSL 3.0
3877 *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
3878 extra data after the compression methods not only for TLS 1.0
3879 but also for SSL 3.0 (as required by the specification).
3880 [Bodo Moeller; problem pointed out by Matthias Loepfe]
3882 *) Change X509_certificate_type() to mark the key as exported/exportable
3883 when it's 512 *bits* long, not 512 bytes.
3886 *) Change AES_cbc_encrypt() so it outputs exact multiple of
3887 blocks during encryption.
3890 *) Various fixes to base64 BIO and non blocking I/O. On write
3891 flushes were not handled properly if the BIO retried. On read
3892 data was not being buffered properly and had various logic bugs.
3893 This also affects blocking I/O when the data being decoded is a
3897 *) Various S/MIME bugfixes and compatibility changes:
3898 output correct application/pkcs7 MIME type if
3899 PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
3900 Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
3901 of files as .eml work). Correctly handle very long lines in MIME
3905 Changes between 0.9.7a and 0.9.7b [10 Apr 2003]
3907 *) Countermeasure against the Klima-Pokorny-Rosa extension of
3908 Bleichbacher's attack on PKCS #1 v1.5 padding: treat
3909 a protocol version number mismatch like a decryption error
3910 in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
3913 *) Turn on RSA blinding by default in the default implementation
3914 to avoid a timing attack. Applications that don't want it can call
3915 RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
3916 They would be ill-advised to do so in most cases.
3917 [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
3919 *) Change RSA blinding code so that it works when the PRNG is not
3920 seeded (in this case, the secret RSA exponent is abused as
3921 an unpredictable seed -- if it is not unpredictable, there
3922 is no point in blinding anyway). Make RSA blinding thread-safe
3923 by remembering the creator's thread ID in rsa->blinding and
3924 having all other threads use local one-time blinding factors
3925 (this requires more computation than sharing rsa->blinding, but
3926 avoids excessive locking; and if an RSA object is not shared
3927 between threads, blinding will still be very fast).
3930 *) Fixed a typo bug that would cause ENGINE_set_default() to set an
3931 ENGINE as defaults for all supported algorithms irrespective of
3932 the 'flags' parameter. 'flags' is now honoured, so applications
3933 should make sure they are passing it correctly.
3936 *) Target "mingw" now allows native Windows code to be generated in
3937 the Cygwin environment as well as with the MinGW compiler.
3940 Changes between 0.9.7 and 0.9.7a [19 Feb 2003]
3942 *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
3943 via timing by performing a MAC computation even if incorrrect
3944 block cipher padding has been found. This is a countermeasure
3945 against active attacks where the attacker has to distinguish
3946 between bad padding and a MAC verification error. (CVE-2003-0078)
3948 [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
3949 Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
3950 Martin Vuagnoux (EPFL, Ilion)]
3952 *) Make the no-err option work as intended. The intention with no-err
3953 is not to have the whole error stack handling routines removed from
3954 libcrypto, it's only intended to remove all the function name and
3955 reason texts, thereby removing some of the footprint that may not
3956 be interesting if those errors aren't displayed anyway.
3958 NOTE: it's still possible for any application or module to have it's
3959 own set of error texts inserted. The routines are there, just not
3960 used by default when no-err is given.
3963 *) Add support for FreeBSD on IA64.
3964 [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
3966 *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
3967 Kerberos function mit_des_cbc_cksum(). Before this change,
3968 the value returned by DES_cbc_cksum() was like the one from
3969 mit_des_cbc_cksum(), except the bytes were swapped.
3970 [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
3972 *) Allow an application to disable the automatic SSL chain building.
3973 Before this a rather primitive chain build was always performed in
3974 ssl3_output_cert_chain(): an application had no way to send the
3975 correct chain if the automatic operation produced an incorrect result.
3977 Now the chain builder is disabled if either:
3979 1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
3981 2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
3983 The reasoning behind this is that an application would not want the
3984 auto chain building to take place if extra chain certificates are
3985 present and it might also want a means of sending no additional
3986 certificates (for example the chain has two certificates and the
3990 *) Add the possibility to build without the ENGINE framework.
3991 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3993 *) Under Win32 gmtime() can return NULL: check return value in
3994 OPENSSL_gmtime(). Add error code for case where gmtime() fails.
3997 *) DSA routines: under certain error conditions uninitialized BN objects
3998 could be freed. Solution: make sure initialization is performed early
3999 enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
4000 Nils Larsch <nla@trustcenter.de> via PR#459)
4003 *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
4004 checked on reconnect on the client side, therefore session resumption
4005 could still fail with a "ssl session id is different" error. This
4006 behaviour is masked when SSL_OP_ALL is used due to
4007 SSL_OP_MICROSOFT_SESS_ID_BUG being set.
4008 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
4009 followup to PR #377.
4012 *) IA-32 assembler support enhancements: unified ELF targets, support
4013 for SCO/Caldera platforms, fix for Cygwin shared build.
4016 *) Add support for FreeBSD on sparc64. As a consequence, support for
4017 FreeBSD on non-x86 processors is separate from x86 processors on
4018 the config script, much like the NetBSD support.
4019 [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
4021 Changes between 0.9.6h and 0.9.7 [31 Dec 2002]
4023 [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
4026 *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
4027 code (06) was taken as the first octet of the session ID and the last
4028 octet was ignored consequently. As a result SSLv2 client side session
4029 caching could not have worked due to the session ID mismatch between
4031 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
4035 *) Change the declaration of needed Kerberos libraries to use EX_LIBS
4036 instead of the special (and badly supported) LIBKRB5. LIBKRB5 is
4040 *) The hw_ncipher.c engine requires dynamic locks. Unfortunately, it
4041 seems that in spite of existing for more than a year, many application
4042 author have done nothing to provide the necessary callbacks, which
4043 means that this particular engine will not work properly anywhere.
4044 This is a very unfortunate situation which forces us, in the name
4045 of usability, to give the hw_ncipher.c a static lock, which is part
4047 NOTE: This is for the 0.9.7 series ONLY. This hack will never
4048 appear in 0.9.8 or later. We EXPECT application authors to have
4049 dealt properly with this when 0.9.8 is released (unless we actually
4050 make such changes in the libcrypto locking code that changes will
4051 have to be made anyway).
4054 *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
4055 octets have been read, EOF or an error occurs. Without this change
4056 some truncated ASN1 structures will not produce an error.
4059 *) Disable Heimdal support, since it hasn't been fully implemented.
4060 Still give the possibility to force the use of Heimdal, but with
4061 warnings and a request that patches get sent to openssl-dev.
4064 *) Add the VC-CE target, introduce the WINCE sysname, and add
4065 INSTALL.WCE and appropriate conditionals to make it build.
4066 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
4068 *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
4069 cygssl-x.y.z.dll, where x, y and z are the major, minor and
4070 edit numbers of the version.
4071 [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
4073 *) Introduce safe string copy and catenation functions
4074 (BUF_strlcpy() and BUF_strlcat()).
4075 [Ben Laurie (CHATS) and Richard Levitte]
4077 *) Avoid using fixed-size buffers for one-line DNs.
4078 [Ben Laurie (CHATS)]
4080 *) Add BUF_MEM_grow_clean() to avoid information leakage when
4081 resizing buffers containing secrets, and use where appropriate.
4082 [Ben Laurie (CHATS)]
4084 *) Avoid using fixed size buffers for configuration file location.
4085 [Ben Laurie (CHATS)]
4087 *) Avoid filename truncation for various CA files.
4088 [Ben Laurie (CHATS)]
4090 *) Use sizeof in preference to magic numbers.
4091 [Ben Laurie (CHATS)]
4093 *) Avoid filename truncation in cert requests.
4094 [Ben Laurie (CHATS)]
4096 *) Add assertions to check for (supposedly impossible) buffer
4098 [Ben Laurie (CHATS)]
4100 *) Don't cache truncated DNS entries in the local cache (this could
4101 potentially lead to a spoofing attack).
4102 [Ben Laurie (CHATS)]
4104 *) Fix various buffers to be large enough for hex/decimal
4105 representations in a platform independent manner.
4106 [Ben Laurie (CHATS)]
4108 *) Add CRYPTO_realloc_clean() to avoid information leakage when
4109 resizing buffers containing secrets, and use where appropriate.
4110 [Ben Laurie (CHATS)]
4112 *) Add BIO_indent() to avoid much slightly worrying code to do
4114 [Ben Laurie (CHATS)]
4116 *) Convert sprintf()/BIO_puts() to BIO_printf().
4117 [Ben Laurie (CHATS)]
4119 *) buffer_gets() could terminate with the buffer only half
4121 [Ben Laurie (CHATS)]
4123 *) Add assertions to prevent user-supplied crypto functions from
4124 overflowing internal buffers by having large block sizes, etc.
4125 [Ben Laurie (CHATS)]
4127 *) New OPENSSL_assert() macro (similar to assert(), but enabled
4129 [Ben Laurie (CHATS)]
4131 *) Eliminate unused copy of key in RC4.
4132 [Ben Laurie (CHATS)]
4134 *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
4135 [Ben Laurie (CHATS)]
4137 *) Fix off-by-one error in EGD path.
4138 [Ben Laurie (CHATS)]
4140 *) If RANDFILE path is too long, ignore instead of truncating.
4141 [Ben Laurie (CHATS)]
4143 *) Eliminate unused and incorrectly sized X.509 structure
4145 [Ben Laurie (CHATS)]
4147 *) Eliminate unused and dangerous function knumber().
4148 [Ben Laurie (CHATS)]
4150 *) Eliminate unused and dangerous structure, KSSL_ERR.
4151 [Ben Laurie (CHATS)]
4153 *) Protect against overlong session ID context length in an encoded
4154 session object. Since these are local, this does not appear to be
4156 [Ben Laurie (CHATS)]
4158 *) Change from security patch (see 0.9.6e below) that did not affect
4159 the 0.9.6 release series:
4161 Remote buffer overflow in SSL3 protocol - an attacker could
4162 supply an oversized master key in Kerberos-enabled versions.
4164 [Ben Laurie (CHATS)]
4166 *) Change the SSL kerb5 codes to match RFC 2712.
4169 *) Make -nameopt work fully for req and add -reqopt switch.
4170 [Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]
4172 *) The "block size" for block ciphers in CFB and OFB mode should be 1.
4173 [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]
4175 *) Make sure tests can be performed even if the corresponding algorithms
4176 have been removed entirely. This was also the last step to make
4177 OpenSSL compilable with DJGPP under all reasonable conditions.
4178 [Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
4180 *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
4181 to allow version independent disabling of normally unselected ciphers,
4182 which may be activated as a side-effect of selecting a single cipher.
4184 (E.g., cipher list string "RSA" enables ciphersuites that are left
4185 out of "ALL" because they do not provide symmetric encryption.
4186 "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
4187 [Lutz Jaenicke, Bodo Moeller]
4189 *) Add appropriate support for separate platform-dependent build
4190 directories. The recommended way to make a platform-dependent
4191 build directory is the following (tested on Linux), maybe with
4194 # Place yourself outside of the OpenSSL source tree. In
4195 # this example, the environment variable OPENSSL_SOURCE
4196 # is assumed to contain the absolute OpenSSL source directory.
4197 mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
4198 cd objtree/"`uname -s`-`uname -r`-`uname -m`"
4199 (cd $OPENSSL_SOURCE; find . -type f) | while read F; do
4200 mkdir -p `dirname $F`
4201 ln -s $OPENSSL_SOURCE/$F $F
4204 To be absolutely sure not to disturb the source tree, a "make clean"
4205 is a good thing. If it isn't successfull, don't worry about it,
4206 it probably means the source directory is very clean.
4209 *) Make sure any ENGINE control commands make local copies of string
4210 pointers passed to them whenever necessary. Otherwise it is possible
4211 the caller may have overwritten (or deallocated) the original string
4212 data when a later ENGINE operation tries to use the stored values.
4213 [Götz Babin-Ebell <babinebell@trustcenter.de>]
4215 *) Improve diagnostics in file reading and command-line digests.
4216 [Ben Laurie aided and abetted by Solar Designer <solar@openwall.com>]
4218 *) Add AES modes CFB and OFB to the object database. Correct an
4219 error in AES-CFB decryption.
4222 *) Remove most calls to EVP_CIPHER_CTX_cleanup() in evp_enc.c, this
4223 allows existing EVP_CIPHER_CTX structures to be reused after
4224 calling EVP_*Final(). This behaviour is used by encryption
4225 BIOs and some applications. This has the side effect that
4226 applications must explicitly clean up cipher contexts with
4227 EVP_CIPHER_CTX_cleanup() or they will leak memory.
4230 *) Check the values of dna and dnb in bn_mul_recursive before calling
4231 bn_mul_comba (a non zero value means the a or b arrays do not contain
4232 n2 elements) and fallback to bn_mul_normal if either is not zero.
4235 *) Fix escaping of non-ASCII characters when using the -subj option
4236 of the "openssl req" command line tool. (Robert Joop <joop@fokus.gmd.de>)
4239 *) Make object definitions compliant to LDAP (RFC2256): SN is the short
4240 form for "surname", serialNumber has no short form.
4241 Use "mail" as the short name for "rfc822Mailbox" according to RFC2798;
4242 therefore remove "mail" short name for "internet 7".
4243 The OID for unique identifiers in X509 certificates is
4244 x500UniqueIdentifier, not uniqueIdentifier.
4245 Some more OID additions. (Michael Bell <michael.bell@rz.hu-berlin.de>)
4248 *) Add an "init" command to the ENGINE config module and auto initialize
4249 ENGINEs. Without any "init" command the ENGINE will be initialized
4250 after all ctrl commands have been executed on it. If init=1 the
4251 ENGINE is initailized at that point (ctrls before that point are run
4252 on the uninitialized ENGINE and after on the initialized one). If
4253 init=0 then the ENGINE will not be iniatialized at all.
4256 *) Fix the 'app_verify_callback' interface so that the user-defined
4257 argument is actually passed to the callback: In the
4258 SSL_CTX_set_cert_verify_callback() prototype, the callback
4259 declaration has been changed from
4262 int (*cb)(X509_STORE_CTX *,void *);
4263 in ssl_verify_cert_chain (ssl/ssl_cert.c), the call
4264 i=s->ctx->app_verify_callback(&ctx)
4265 has been changed into
4266 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg).
4268 To update applications using SSL_CTX_set_cert_verify_callback(),
4269 a dummy argument can be added to their callback functions.
4270 [D. K. Smetters <smetters@parc.xerox.com>]
4272 *) Added the '4758cca' ENGINE to support IBM 4758 cards.