5 Changes between 1.0.1 and 1.1.0 [xx XXX xxxx]
7 *) Add support for HMAC DRBG from SP800-90. Update algorithm and POST
11 *) Add GCM support to TLS library. Some custom code is needed to split
12 the IV between the fixed (from PRF) and explicit (from TLS record)
13 portions. This adds all GCM ciphersuites supported by RFC5288 and
14 RFC5289. Generalise some AES* cipherstrings to inlclude GCM and
15 add a special AESGCM string for GCM only.
18 *) Expand range of ctrls for AES GCM. Permit setting invocation
19 field on decrypt and retrieval of invocation field only on encrypt.
22 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
23 As required by RFC5289 these ciphersuites cannot be used if for
24 versions of TLS earlier than 1.2.
27 *) Add functions FIPS_module_version() and FIPS_module_version_text()
28 to return numberical and string versions of the FIPS module number.
31 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
32 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implmeneted
33 outside the validated module in the FIPS capable OpenSSL.
36 *) Minor change to DRBG entropy callback semantics. In some cases
37 there is no mutiple of the block length between min_len and
38 max_len. Allow the callback to return more than max_len bytes
39 of entropy but discard any extra: it is the callback's responsibility
40 to ensure that the extra data discarded does not impact the
41 requested amount of entropy.
44 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
45 information in FIPS186-3, SP800-57 and SP800-131A.
48 *) CCM support via EVP. Interface is very similar to GCM case except we
49 must supply all data in one chunk (i.e. no update, final) and the
50 message length must be supplied if AAD is used. Add algorithm test
54 *) Initial version of POST overhaul. Add POST callback to allow the status
55 of POST to be monitored and/or failures induced. Modify fips_test_suite
56 to use callback. Always run all selftests even if one fails.
59 *) XTS support including algorithm test driver in the fips_gcmtest program.
60 Note: this does increase the maximum key length from 32 to 64 bytes but
61 there should be no binary compatibility issues as existing applications
62 will never use XTS mode.
65 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
66 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
67 performs algorithm blocking for unapproved PRNG types. Also do not
68 set PRNG type in FIPS_mode_set(): leave this to the application.
69 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
70 the standard OpenSSL PRNG: set additional data to a date time vector.
73 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
74 This shouldn't present any incompatibility problems because applications
75 shouldn't be using these directly and any that are will need to rethink
76 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
79 *) Extensive self tests and health checking required by SP800-90 DRBG.
80 Remove strength parameter from FIPS_drbg_instantiate and always
81 instantiate at maximum supported strength.
84 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
87 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
90 *) New function DH_compute_key_padded() to compute a DH key and pad with
91 leading zeroes if needed: this complies with SP800-56A et al.
94 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
95 anything, incomplete, subject to change and largely untested at present.
98 *) Modify fipscanisteronly build option to only build the necessary object
99 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
102 *) Add experimental option FIPSSYMS to give all symbols in
103 fipscanister.o and FIPS or fips prefix. This will avoid
104 conflicts with future versions of OpenSSL. Add perl script
105 util/fipsas.pl to preprocess assembly language source files
106 and rename any affected symbols.
109 *) Add selftest checks and algorithm block of non-fips algorithms in
110 FIPS mode. Remove DES2 from selftests.
113 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
114 return internal method without any ENGINE dependencies. Add new
115 tiny fips sign and verify functions.
118 *) New build option no-ec2m to disable characteristic 2 code.
121 *) New build option "fipscanisteronly". This only builds fipscanister.o
122 and (currently) associated fips utilities. Uses the file Makefile.fips
123 instead of Makefile.org as the prototype.
126 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
127 Update fips_gcmtest to use IV generator.
130 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
131 setting output buffer to NULL. The *Final function must be
132 called although it will not retrieve any additional data. The tag
133 can be set or retrieved with a ctrl. The IV length is by default 12
134 bytes (96 bits) but can be set to an alternative value. If the IV
135 length exceeds the maximum IV length (currently 16 bytes) it cannot be
139 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
140 underlying do_cipher function handles all cipher semantics itself
141 including padding and finalisation. This is useful if (for example)
142 an ENGINE cipher handles block padding itself. The behaviour of
143 do_cipher is subtly changed if this flag is set: the return value
144 is the number of characters written to the output buffer (zero is
145 no longer an error code) or a negative error code. Also if the
146 input buffer is NULL and length 0 finalisation should be performed.
149 *) If a candidate issuer certificate is already part of the constructed
150 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
153 *) Improve forward-security support: add functions
155 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
156 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
158 for use by SSL/TLS servers; the callback function will be called whenever a
159 new session is created, and gets to decide whether the session may be
160 cached to make it resumable (return 0) or not (return 1). (As by the
161 SSL/TLS protocol specifications, the session_id sent by the server will be
162 empty to indicate that the session is not resumable; also, the server will
163 not generate RFC 4507 (RFC 5077) session tickets.)
165 A simple reasonable callback implementation is to return is_forward_secure.
166 This parameter will be set to 1 or 0 depending on the ciphersuite selected
167 by the SSL/TLS server library, indicating whether it can provide forward
169 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
171 *) Add Next Protocol Negotiation,
172 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
173 disabled with a no-npn flag to config or Configure. Code donated
175 [Adam Langley <agl@google.com> and Ben Laurie]
177 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
178 all platforms. Move ssize_t definition from e_os.h to the public
179 header file e_os2.h as it now appears in public header file cms.h
182 *) New function OPENSSL_gmtime_diff to find the difference in days
183 and seconds between two tm structures. This will be used to provide
184 additional functionality for ASN1_TIME.
187 *) New -sigopt option to the ca, req and x509 utilities. Additional
188 signature parameters can be passed using this option and in
192 *) Add RSA PSS signing function. This will generate and set the
193 appropriate AlgorithmIdentifiers for PSS based on those in the
194 corresponding EVP_MD_CTX structure. No application support yet.
197 *) Support for companion algorithm specific ASN1 signing routines.
198 New function ASN1_item_sign_ctx() signs a pre-initialised
199 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
200 the appropriate parameters.
203 *) Add new algorithm specific ASN1 verification initialisation function
204 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
205 handling will be the same no matter what EVP_PKEY_METHOD is used.
206 Add a PSS handler to support verification of PSS signatures: checked
207 against a number of sample certificates.
210 *) Add signature printing for PSS. Add PSS OIDs.
211 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
213 *) Add algorithm specific signature printing. An individual ASN1 method
214 can now print out signatures instead of the standard hex dump.
216 More complex signatures (e.g. PSS) can print out more meaningful
217 information. Include DSA version that prints out the signature
221 *) Add -trusted_first option which attempts to find certificates in the
222 trusted store even if an untrusted chain is also supplied.
225 *) Initial experimental support for explicitly trusted non-root CAs.
226 OpenSSL still tries to build a complete chain to a root but if an
227 intermediate CA has a trust setting included that is used. The first
228 setting is used: whether to trust or reject.
231 *) New -verify_name option in command line utilities to set verification
235 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
236 Add CMAC pkey methods.
239 *) Experiemental regnegotiation in s_server -www mode. If the client
240 browses /reneg connection is renegotiated. If /renegcert it is
241 renegotiated requesting a certificate.
244 *) Add an "external" session cache for debugging purposes to s_server. This
245 should help trace issues which normally are only apparent in deployed
246 multi-process servers.
249 *) Experiemental password based recipient info support for CMS library:
250 implementing RFC3211.
253 *) Split password based encryption into PBES2 and PBKDF2 functions. This
254 neatly separates the code into cipher and PBE sections and is required
255 for some algorithms that split PBES2 into separate pieces (such as
259 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
260 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
261 BIO_set_cipher() and some obscure PEM functions were changed so they
262 can now return an error. The RAND changes required a change to the
263 RAND_METHOD structure.
266 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
267 a gcc attribute to warn if the result of a function is ignored. This
268 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
269 whose return value is often ignored.
272 Changes between 1.0.0e and 1.0.1 [xx XXX xxxx]
274 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
275 ENGINE is used then we cannot handle that in the FIPS module so we
276 keep original code iff non-FIPS operations are allowed.
279 *) Add -attime option to openssl verify.
280 [Peter Eckersley <pde@eff.org> and Ben Laurie]
282 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
285 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
286 FIPS EC methods unconditionally for now.
289 *) New build option no-ec2m to disable characteristic 2 code.
292 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
293 all cases can be covered as some introduce binary incompatibilities.
296 *) Redirect RSA operations to FIPS module including keygen,
297 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
300 *) Add similar low level API blocking to ciphers.
303 *) Low level digest APIs are not approved in FIPS mode: any attempt
304 to use these will cause a fatal error. Applications that *really* want
305 to use them can use the private_* version instead.
308 *) Redirect cipher operations to FIPS module for FIPS builds.
311 *) Redirect digest operations to FIPS module for FIPS builds.
314 *) Update build system to add "fips" flag which will link in fipscanister.o
315 for static and shared library builds embedding a signature if needed.
318 *) Output TLS supported curves in preference order instead of numerical
319 order. This is currently hardcoded for the highest order curves first.
320 This should be configurable so applications can judge speed vs strength.
323 *) Add TLS v1.2 server support for client authentication.
326 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
330 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
331 FIPS modules versions.
334 *) Add TLS v1.2 client side support for client authentication. Keep cache
335 of handshake records longer as we don't know the hash algorithm to use
336 until after the certificate request message is received.
339 *) Initial TLS v1.2 client support. Add a default signature algorithms
340 extension including all the algorithms we support. Parse new signature
341 format in client key exchange. Relax some ECC signing restrictions for
342 TLS v1.2 as indicated in RFC5246.
345 *) Add server support for TLS v1.2 signature algorithms extension. Switch
346 to new signature format when needed using client digest preference.
347 All server ciphersuites should now work correctly in TLS v1.2. No client
348 support yet and no support for client certificates.
351 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
352 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
353 ciphersuites. At present only RSA key exchange ciphersuites work with
354 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
355 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
356 and version checking.
359 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
360 with this defined it will not be affected by any changes to ssl internal
361 structures. Add several utility functions to allow openssl application
362 to work with OPENSSL_NO_SSL_INTERN defined.
366 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
368 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
371 *) Add EC_GFp_nistp224_method(), a 64-bit optimized implementation for
372 elliptic curve NIST-P224 with constant-time single point multiplication on
373 typical inputs. EC_GROUP_new_by_curve_name() will automatically use this
374 (while EC_GROUP_new_curve_GFp() currently won't and prefers the more
375 flexible implementations).
377 The implementation requires support for the nonstandard type __uint128_t,
378 and so is disabled by default. To include this in your build of OpenSSL,
379 use -DEC_NISTP224_64_GCC_128 on the Configure (or config) command line,
380 and run "make depend" (or "make update").
381 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
383 *) Permit abbreviated handshakes when renegotiating using the function
384 SSL_renegotiate_abbreviated().
385 [Robin Seggelmann <seggelmann@fh-muenster.de>]
387 *) Add call to ENGINE_register_all_complete() to
388 ENGINE_load_builtin_engines(), so some implementations get used
389 automatically instead of needing explicit application support.
392 *) Add support for TLS key exporter as described in RFC5705.
393 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
395 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
396 a few changes are required:
398 Add SSL_OP_NO_TLSv1_1 flag.
400 Update version checking logic to handle version 1.1.
401 Add explicit IV handling (ported from DTLS code).
402 Add command line options to s_client/s_server.
405 Changes between 1.0.0d and 1.0.0e [xx XXX xxxx]
407 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
408 signature public key algorithm by using OID xref utilities instead.
409 Before this you could only use some ECC ciphersuites with SHA1 only.
412 *) Add protection against ECDSA timing attacks as mentioned in the paper
413 by Billy Bob Brumley and Nicola Tuveri, see:
415 http://eprint.iacr.org/2011/232.pdf
417 [Billy Bob Brumley and Nicola Tuveri]
419 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
421 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
422 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
424 *) Fix bug in string printing code: if *any* escaping is enabled we must
425 escape the escape character (backslash) or the resulting string is
429 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
431 *) Disable code workaround for ancient and obsolete Netscape browsers
432 and servers: an attacker can use it in a ciphersuite downgrade attack.
433 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
436 *) Fixed J-PAKE implementation error, originally discovered by
437 Sebastien Martini, further info and confirmation from Stefan
438 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
441 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
443 *) Fix extension code to avoid race conditions which can result in a buffer
444 overrun vulnerability: resumed sessions must not be modified as they can
445 be shared by multiple threads. CVE-2010-3864
448 *) Fix WIN32 build system to correctly link an ENGINE directory into
452 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
454 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
456 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
458 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
460 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
461 context. The operation can be customised via the ctrl mechanism in
462 case ENGINEs want to include additional functionality.
465 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
468 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
469 output hashes compatible with older versions of OpenSSL.
470 [Willy Weisz <weisz@vcpc.univie.ac.at>]
472 *) Fix compression algorithm handling: if resuming a session use the
473 compression algorithm of the resumed session instead of determining
474 it from client hello again. Don't allow server to change algorithm.
477 *) Add load_crls() function to apps tidying load_certs() too. Add option
478 to verify utility to allow additional CRLs to be included.
481 *) Update OCSP request code to permit adding custom headers to the request:
482 some responders need this.
485 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
487 [Julia Lawall <julia@diku.dk>]
489 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
490 needlessly dereferenced structures, used obsolete functions and
491 didn't handle all updated verify codes correctly.
494 *) Disable MD2 in the default configuration.
497 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
498 indicate the initial BIO being pushed or popped. This makes it possible
499 to determine whether the BIO is the one explicitly called or as a result
500 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
501 it handles reference counts correctly and doesn't zero out the I/O bio
502 when it is not being explicitly popped. WARNING: applications which
503 included workarounds for the old buggy behaviour will need to be modified
504 or they could free up already freed BIOs.
507 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
508 renaming to all platforms (within the 0.9.8 branch, this was
509 done conditionally on Netware platforms to avoid a name clash).
510 [Guenter <lists@gknw.net>]
512 *) Add ECDHE and PSK support to DTLS.
513 [Michael Tuexen <tuexen@fh-muenster.de>]
515 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
519 *) Add "missing" function EVP_MD_flags() (without this the only way to
520 retrieve a digest flags is by accessing the structure directly. Update
521 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
522 or cipher is registered as in the "from" argument. Print out all
523 registered digests in the dgst usage message instead of manually
524 attempting to work them out.
527 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
528 this allows the use of compression and extensions. Change default cipher
529 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
530 by default unless an application cipher string requests it.
533 *) Alter match criteria in PKCS12_parse(). It used to try to use local
534 key ids to find matching certificates and keys but some PKCS#12 files
535 don't follow the (somewhat unwritten) rules and this strategy fails.
536 Now just gather all certificates together and the first private key
537 then look for the first certificate that matches the key.
540 *) Support use of registered digest and cipher names for dgst and cipher
541 commands instead of having to add each one as a special case. So now
548 openssl dgst -sha256 foo
550 and this works for ENGINE based algorithms too.
554 *) Update Gost ENGINE to support parameter files.
555 [Victor B. Wagner <vitus@cryptocom.ru>]
557 *) Support GeneralizedTime in ca utility.
558 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
560 *) Enhance the hash format used for certificate directory links. The new
561 form uses the canonical encoding (meaning equivalent names will work
562 even if they aren't identical) and uses SHA1 instead of MD5. This form
563 is incompatible with the older format and as a result c_rehash should
564 be used to rebuild symbolic links.
567 *) Make PKCS#8 the default write format for private keys, replacing the
568 traditional format. This form is standardised, more secure and doesn't
569 include an implicit MD5 dependency.
572 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
573 committed to OpenSSL should pass this lot as a minimum.
576 *) Add session ticket override functionality for use by EAP-FAST.
577 [Jouni Malinen <j@w1.fi>]
579 *) Modify HMAC functions to return a value. Since these can be implemented
580 in an ENGINE errors can occur.
583 *) Type-checked OBJ_bsearch_ex.
586 *) Type-checked OBJ_bsearch. Also some constification necessitated
587 by type-checking. Still to come: TXT_DB, bsearch(?),
588 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
592 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
593 seconds to a tm structure directly, instead of going through OS
594 specific date routines. This avoids any issues with OS routines such
595 as the year 2038 bug. New *_adj() functions for ASN1 time structures
596 and X509_time_adj_ex() to cover the extended range. The existing
597 X509_time_adj() is still usable and will no longer have any date issues.
600 *) Delta CRL support. New use deltas option which will attempt to locate
601 and search any appropriate delta CRLs available.
603 This work was sponsored by Google.
606 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
607 code and add additional score elements. Validate alternate CRL paths
608 as part of the CRL checking and indicate a new error "CRL path validation
609 error" in this case. Applications wanting additional details can use
610 the verify callback and check the new "parent" field. If this is not
611 NULL CRL path validation is taking place. Existing applications wont
612 see this because it requires extended CRL support which is off by
615 This work was sponsored by Google.
618 *) Support for freshest CRL extension.
620 This work was sponsored by Google.
623 *) Initial indirect CRL support. Currently only supported in the CRLs
624 passed directly and not via lookup. Process certificate issuer
625 CRL entry extension and lookup CRL entries by bother issuer name
626 and serial number. Check and process CRL issuer entry in IDP extension.
628 This work was sponsored by Google.
631 *) Add support for distinct certificate and CRL paths. The CRL issuer
632 certificate is validated separately in this case. Only enabled if
633 an extended CRL support flag is set: this flag will enable additional
634 CRL functionality in future.
636 This work was sponsored by Google.
639 *) Add support for policy mappings extension.
641 This work was sponsored by Google.
644 *) Fixes to pathlength constraint, self issued certificate handling,
645 policy processing to align with RFC3280 and PKITS tests.
647 This work was sponsored by Google.
650 *) Support for name constraints certificate extension. DN, email, DNS
651 and URI types are currently supported.
653 This work was sponsored by Google.
656 *) To cater for systems that provide a pointer-based thread ID rather
657 than numeric, deprecate the current numeric thread ID mechanism and
658 replace it with a structure and associated callback type. This
659 mechanism allows a numeric "hash" to be extracted from a thread ID in
660 either case, and on platforms where pointers are larger than 'long',
661 mixing is done to help ensure the numeric 'hash' is usable even if it
662 can't be guaranteed unique. The default mechanism is to use "&errno"
663 as a pointer-based thread ID to distinguish between threads.
665 Applications that want to provide their own thread IDs should now use
666 CRYPTO_THREADID_set_callback() to register a callback that will call
667 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
669 Note that ERR_remove_state() is now deprecated, because it is tied
670 to the assumption that thread IDs are numeric. ERR_remove_state(0)
671 to free the current thread's error state should be replaced by
672 ERR_remove_thread_state(NULL).
674 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
675 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
676 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
677 application was previously providing a numeric thread callback that
678 was inappropriate for distinguishing threads, then uniqueness might
679 have been obtained with &errno that happened immediately in the
680 intermediate development versions of OpenSSL; this is no longer the
681 case, the numeric thread callback will now override the automatic use
683 [Geoff Thorpe, with help from Bodo Moeller]
685 *) Initial support for different CRL issuing certificates. This covers a
686 simple case where the self issued certificates in the chain exist and
687 the real CRL issuer is higher in the existing chain.
689 This work was sponsored by Google.
692 *) Removed effectively defunct crypto/store from the build.
695 *) Revamp of STACK to provide stronger type-checking. Still to come:
696 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
697 ASN1_STRING, CONF_VALUE.
700 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
701 RAM on SSL connections. This option can save about 34k per idle SSL.
704 *) Revamp of LHASH to provide stronger type-checking. Still to come:
705 STACK, TXT_DB, bsearch, qsort.
708 *) Initial support for Cryptographic Message Syntax (aka CMS) based
709 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
710 support for data, signedData, compressedData, digestedData and
711 encryptedData, envelopedData types included. Scripts to check against
712 RFC4134 examples draft and interop and consistency checks of many
713 content types and variants.
716 *) Add options to enc utility to support use of zlib compression BIO.
719 *) Extend mk1mf to support importing of options and assembly language
720 files from Configure script, currently only included in VC-WIN32.
721 The assembly language rules can now optionally generate the source
722 files from the associated perl scripts.
725 *) Implement remaining functionality needed to support GOST ciphersuites.
726 Interop testing has been performed using CryptoPro implementations.
727 [Victor B. Wagner <vitus@cryptocom.ru>]
729 *) s390x assembler pack.
732 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
736 *) Implement Opaque PRF Input TLS extension as specified in
737 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
738 official specification yet and no extension type assignment by
739 IANA exists, this extension (for now) will have to be explicitly
740 enabled when building OpenSSL by providing the extension number
741 to use. For example, specify an option
743 -DTLSEXT_TYPE_opaque_prf_input=0x9527
745 to the "config" or "Configure" script to enable the extension,
746 assuming extension number 0x9527 (which is a completely arbitrary
747 and unofficial assignment based on the MD5 hash of the Internet
748 Draft). Note that by doing so, you potentially lose
749 interoperability with other TLS implementations since these might
750 be using the same extension number for other purposes.
752 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
753 opaque PRF input value to use in the handshake. This will create
754 an interal copy of the length-'len' string at 'src', and will
755 return non-zero for success.
757 To get more control and flexibility, provide a callback function
760 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
761 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
765 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
768 Callback function 'cb' will be called in handshakes, and is
769 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
770 Argument 'arg' is for application purposes (the value as given to
771 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
772 be provided to the callback function). The callback function
773 has to return non-zero to report success: usually 1 to use opaque
774 PRF input just if possible, or 2 to enforce use of the opaque PRF
775 input. In the latter case, the library will abort the handshake
776 if opaque PRF input is not successfully negotiated.
778 Arguments 'peerinput' and 'len' given to the callback function
779 will always be NULL and 0 in the case of a client. A server will
780 see the client's opaque PRF input through these variables if
781 available (NULL and 0 otherwise). Note that if the server
782 provides an opaque PRF input, the length must be the same as the
783 length of the client's opaque PRF input.
785 Note that the callback function will only be called when creating
786 a new session (session resumption can resume whatever was
787 previously negotiated), and will not be called in SSL 2.0
788 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
789 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
790 for applications that need to enforce opaque PRF input.
794 *) Update ssl code to support digests other than SHA1+MD5 for handshake
797 [Victor B. Wagner <vitus@cryptocom.ru>]
799 *) Add RFC4507 support to OpenSSL. This includes the corrections in
800 RFC4507bis. The encrypted ticket format is an encrypted encoded
801 SSL_SESSION structure, that way new session features are automatically
804 If a client application caches session in an SSL_SESSION structure
805 support is transparent because tickets are now stored in the encoded
808 The SSL_CTX structure automatically generates keys for ticket
809 protection in servers so again support should be possible
810 with no application modification.
812 If a client or server wishes to disable RFC4507 support then the option
813 SSL_OP_NO_TICKET can be set.
815 Add a TLS extension debugging callback to allow the contents of any client
816 or server extensions to be examined.
818 This work was sponsored by Google.
821 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
822 OpenSSL should now compile cleanly on gcc 4.2
823 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
825 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
826 support including streaming MAC support: this is required for GOST
828 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
830 *) Add option -stream to use PKCS#7 streaming in smime utility. New
831 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
832 to output in BER and PEM format.
835 *) Experimental support for use of HMAC via EVP_PKEY interface. This
836 allows HMAC to be handled via the EVP_DigestSign*() interface. The
837 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
838 ENGINE support for HMAC keys which are unextractable. New -mac and
839 -macopt options to dgst utility.
842 *) New option -sigopt to dgst utility. Update dgst to use
843 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
844 alternative signing paramaters such as X9.31 or PSS in the dgst
848 *) Change ssl_cipher_apply_rule(), the internal function that does
849 the work each time a ciphersuite string requests enabling
850 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
851 removing ("!foo+bar") a class of ciphersuites: Now it maintains
852 the order of disabled ciphersuites such that those ciphersuites
853 that most recently went from enabled to disabled not only stay
854 in order with respect to each other, but also have higher priority
855 than other disabled ciphersuites the next time ciphersuites are
858 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
859 the same ciphersuites as with "HIGH" alone, but in a specific
860 order where the PSK ciphersuites come first (since they are the
861 most recently disabled ciphersuites when "HIGH" is parsed).
863 Also, change ssl_create_cipher_list() (using this new
864 funcionality) such that between otherwise identical
865 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
869 *) Change ssl_create_cipher_list() so that it automatically
870 arranges the ciphersuites in reasonable order before starting
871 to process the rule string. Thus, the definition for "DEFAULT"
872 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
873 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
874 This makes it much easier to arrive at a reasonable default order
875 in applications for which anonymous ciphers are OK (meaning
876 that you can't actually use DEFAULT).
877 [Bodo Moeller; suggested by Victor Duchovni]
879 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
880 processing) into multiple integers instead of setting
881 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
882 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
883 (These masks as well as the individual bit definitions are hidden
884 away into the non-exported interface ssl/ssl_locl.h, so this
885 change to the definition of the SSL_CIPHER structure shouldn't
886 affect applications.) This give us more bits for each of these
887 categories, so there is no longer a need to coagulate AES128 and
888 AES256 into a single algorithm bit, and to coagulate Camellia128
889 and Camellia256 into a single algorithm bit, which has led to all
892 Thus, among other things, the kludge introduced in 0.9.7m and
893 0.9.8e for masking out AES256 independently of AES128 or masking
894 out Camellia256 independently of AES256 is not needed here in 0.9.9.
896 With the change, we also introduce new ciphersuite aliases that
897 so far were missing: "AES128", "AES256", "CAMELLIA128", and
901 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
902 Use the leftmost N bytes of the signature input if the input is
903 larger than the prime q (with N being the size in bytes of q).
906 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
907 it yet and it is largely untested.
910 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
913 *) Initial incomplete changes to avoid need for function casts in OpenSSL
914 some compilers (gcc 4.2 and later) reject their use. Safestack is
915 reimplemented. Update ASN1 to avoid use of legacy functions.
918 *) Win32/64 targets are linked with Winsock2.
921 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
922 to external functions. This can be used to increase CRL handling
923 efficiency especially when CRLs are very large by (for example) storing
924 the CRL revoked certificates in a database.
927 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
928 new CRLs added to a directory can be used. New command line option
929 -verify_return_error to s_client and s_server. This causes real errors
930 to be returned by the verify callback instead of carrying on no matter
931 what. This reflects the way a "real world" verify callback would behave.
934 *) GOST engine, supporting several GOST algorithms and public key formats.
935 Kindly donated by Cryptocom.
938 *) Partial support for Issuing Distribution Point CRL extension. CRLs
939 partitioned by DP are handled but no indirect CRL or reason partitioning
940 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
941 selected via a scoring technique which handles IDP and AKID in CRLs.
944 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
945 will ultimately be used for all verify operations: this will remove the
946 X509_STORE dependency on certificate verification and allow alternative
947 lookup methods. X509_STORE based implementations of these two callbacks.
950 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
951 Modify get_crl() to find a valid (unexpired) CRL if possible.
954 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
955 this would be called X509_CRL_cmp() but that name is already used by
956 a function that just compares CRL issuer names. Cache several CRL
957 extensions in X509_CRL structure and cache CRLDP in X509.
960 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
961 this maps equivalent X509_NAME structures into a consistent structure.
962 Name comparison can then be performed rapidly using memcmp().
965 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
969 *) Allow digests to supply their own micalg string for S/MIME type using
970 the ctrl EVP_MD_CTRL_MICALG.
973 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
974 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
975 ctrl. It can then customise the structure before and/or after signing
979 *) New function OBJ_add_sigid() to allow application defined signature OIDs
980 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
981 to free up any added signature OIDs.
984 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
985 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
986 digest and cipher tables. New options added to openssl utility:
987 list-message-digest-algorithms and list-cipher-algorithms.
990 *) Change the array representation of binary polynomials: the list
991 of degrees of non-zero coefficients is now terminated with -1.
992 Previously it was terminated with 0, which was also part of the
993 value; thus, the array representation was not applicable to
994 polynomials where t^0 has coefficient zero. This change makes
995 the array representation useful in a more general context.
998 *) Various modifications and fixes to SSL/TLS cipher string
999 handling. For ECC, the code now distinguishes between fixed ECDH
1000 with RSA certificates on the one hand and with ECDSA certificates
1001 on the other hand, since these are separate ciphersuites. The
1002 unused code for Fortezza ciphersuites has been removed.
1004 For consistency with EDH, ephemeral ECDH is now called "EECDH"
1005 (not "ECDHE"). For consistency with the code for DH
1006 certificates, use of ECDH certificates is now considered ECDH
1007 authentication, not RSA or ECDSA authentication (the latter is
1008 merely the CA's signing algorithm and not actively used in the
1011 The temporary ciphersuite alias "ECCdraft" is no longer
1012 available, and ECC ciphersuites are no longer excluded from "ALL"
1013 and "DEFAULT". The following aliases now exist for RFC 4492
1014 ciphersuites, most of these by analogy with the DH case:
1016 kECDHr - ECDH cert, signed with RSA
1017 kECDHe - ECDH cert, signed with ECDSA
1018 kECDH - ECDH cert (signed with either RSA or ECDSA)
1019 kEECDH - ephemeral ECDH
1020 ECDH - ECDH cert or ephemeral ECDH
1026 AECDH - anonymous ECDH
1027 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
1031 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
1032 Use correct micalg parameters depending on digest(s) in signed message.
1035 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
1036 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
1039 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
1040 an engine to register a method. Add ENGINE lookups for methods and
1041 functional reference processing.
1044 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
1045 EVP_{Sign,Verify}* which allow an application to customise the signature
1049 *) New -resign option to smime utility. This adds one or more signers
1050 to an existing PKCS#7 signedData structure. Also -md option to use an
1051 alternative message digest algorithm for signing.
1054 *) Tidy up PKCS#7 routines and add new functions to make it easier to
1055 create PKCS7 structures containing multiple signers. Update smime
1056 application to support multiple signers.
1059 *) New -macalg option to pkcs12 utility to allow setting of an alternative
1063 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
1064 Reorganize PBE internals to lookup from a static table using NIDs,
1065 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
1066 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
1067 PRF which will be automatically used with PBES2.
1070 *) Replace the algorithm specific calls to generate keys in "req" with the
1074 *) Update PKCS#7 enveloped data routines to use new API. This is now
1075 supported by any public key method supporting the encrypt operation. A
1076 ctrl is added to allow the public key algorithm to examine or modify
1077 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
1081 *) Add a ctrl to asn1 method to allow a public key algorithm to express
1082 a default digest type to use. In most cases this will be SHA1 but some
1083 algorithms (such as GOST) need to specify an alternative digest. The
1084 return value indicates how strong the prefernce is 1 means optional and
1085 2 is mandatory (that is it is the only supported type). Modify
1086 ASN1_item_sign() to accept a NULL digest argument to indicate it should
1087 use the default md. Update openssl utilities to use the default digest
1088 type for signing if it is not explicitly indicated.
1091 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
1092 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
1093 signing method from the key type. This effectively removes the link
1094 between digests and public key types.
1097 *) Add an OID cross reference table and utility functions. Its purpose is to
1098 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
1099 rsaEncryption. This will allow some of the algorithm specific hackery
1100 needed to use the correct OID to be removed.
1103 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
1104 structures for PKCS7_sign(). They are now set up by the relevant public
1108 *) Add provisional EC pkey method with support for ECDSA and ECDH.
1111 *) Add support for key derivation (agreement) in the API, DH method and
1115 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
1116 public and private key formats. As a side effect these add additional
1117 command line functionality not previously available: DSA signatures can be
1118 generated and verified using pkeyutl and DH key support and generation in
1123 [Oliver Tappe <zooey@hirschkaefer.de>]
1125 *) New make target "install_html_docs" installs HTML renditions of the
1127 [Oliver Tappe <zooey@hirschkaefer.de>]
1129 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
1130 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
1131 support key and parameter generation and add initial key generation
1132 functionality for RSA.
1135 *) Add functions for main EVP_PKEY_method operations. The undocumented
1136 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
1137 EVP_PKEY_{encrypt,decrypt}_old.
1140 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
1141 key API, doesn't do much yet.
1144 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
1145 public key algorithms. New option to openssl utility:
1146 "list-public-key-algorithms" to print out info.
1149 *) Implement the Supported Elliptic Curves Extension for
1150 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1153 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
1154 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
1157 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
1158 utilities such as rsa, dsa, dsaparam etc except they process any key
1162 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
1163 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
1164 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
1168 *) Initial support for pluggable public key ASN1.
1169 De-spaghettify the public key ASN1 handling. Move public and private
1170 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
1171 algorithm specific handling to a single module within the relevant
1172 algorithm directory. Add functions to allow (near) opaque processing
1173 of public and private key structures.
1176 *) Implement the Supported Point Formats Extension for
1177 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1180 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
1181 for the psk identity [hint] and the psk callback functions to the
1182 SSL_SESSION, SSL and SSL_CTX structure.
1185 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
1189 SSL_CTX_use_psk_identity_hint
1190 SSL_get_psk_identity_hint
1191 SSL_get_psk_identity
1192 SSL_use_psk_identity_hint
1194 [Mika Kousa and Pasi Eronen of Nokia Corporation]
1196 *) Add RFC 3161 compliant time stamp request creation, response generation
1197 and response verification functionality.
1198 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
1200 *) Add initial support for TLS extensions, specifically for the server_name
1201 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1202 have new members for a host name. The SSL data structure has an
1203 additional member SSL_CTX *initial_ctx so that new sessions can be
1204 stored in that context to allow for session resumption, even after the
1205 SSL has been switched to a new SSL_CTX in reaction to a client's
1206 server_name extension.
1208 New functions (subject to change):
1210 SSL_get_servername()
1211 SSL_get_servername_type()
1214 New CTRL codes and macros (subject to change):
1216 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1217 - SSL_CTX_set_tlsext_servername_callback()
1218 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1219 - SSL_CTX_set_tlsext_servername_arg()
1220 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1222 openssl s_client has a new '-servername ...' option.
1224 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1225 '-key2 ...', '-servername_fatal' (subject to change). This allows
1226 testing the HostName extension for a specific single host name ('-cert'
1227 and '-key' remain fallbacks for handshakes without HostName
1228 negotiation). If the unrecogninzed_name alert has to be sent, this by
1229 default is a warning; it becomes fatal with the '-servername_fatal'
1232 [Peter Sylvester, Remy Allais, Christophe Renou]
1234 *) Whirlpool hash implementation is added.
1237 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
1238 bn(64,32). Because of instruction set limitations it doesn't have
1239 any negative impact on performance. This was done mostly in order
1240 to make it possible to share assembler modules, such as bn_mul_mont
1241 implementations, between 32- and 64-bit builds without hassle.
1244 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
1245 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
1249 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
1250 dedicated Montgomery multiplication procedure, is introduced.
1251 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
1252 "64-bit" performance on certain 32-bit targets.
1255 *) New option SSL_OP_NO_COMP to disable use of compression selectively
1256 in SSL structures. New SSL ctrl to set maximum send fragment size.
1257 Save memory by seeting the I/O buffer sizes dynamically instead of
1258 using the maximum available value.
1261 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
1262 in addition to the text details.
1265 *) Very, very preliminary EXPERIMENTAL support for printing of general
1266 ASN1 structures. This currently produces rather ugly output and doesn't
1267 handle several customised structures at all.
1270 *) Integrated support for PVK file format and some related formats such
1271 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
1272 these in the 'rsa' and 'dsa' utilities.
1275 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
1278 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
1279 place for the (very old) "NETSCAPE" format certificates which are now
1280 handled using new ASN1 code equivalents.
1283 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
1284 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
1285 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
1288 *) Modify CRL distribution points extension code to print out previously
1289 unsupported fields. Enhance extension setting code to allow setting of
1293 *) Add print and set support for Issuing Distribution Point CRL extension.
1296 *) Change 'Configure' script to enable Camellia by default.
1299 Changes between 0.9.8r and 0.9.8s [xx XXX xxxx]
1301 *) Add protection against ECDSA timing attacks as mentioned in the paper
1302 by Billy Bob Brumley and Nicola Tuveri, see:
1304 http://eprint.iacr.org/2011/232.pdf
1306 [Billy Bob Brumley and Nicola Tuveri]
1308 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
1310 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1311 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1313 *) Fix bug in string printing code: if *any* escaping is enabled we must
1314 escape the escape character (backslash) or the resulting string is
1318 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
1320 *) Disable code workaround for ancient and obsolete Netscape browsers
1321 and servers: an attacker can use it in a ciphersuite downgrade attack.
1322 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1325 *) Fixed J-PAKE implementation error, originally discovered by
1326 Sebastien Martini, further info and confirmation from Stefan
1327 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1330 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
1332 *) Fix extension code to avoid race conditions which can result in a buffer
1333 overrun vulnerability: resumed sessions must not be modified as they can
1334 be shared by multiple threads. CVE-2010-3864
1337 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
1340 *) Don't reencode certificate when calculating signature: cache and use
1341 the original encoding instead. This makes signature verification of
1342 some broken encodings work correctly.
1345 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
1346 is also one of the inputs.
1347 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
1349 *) Don't repeatedly append PBE algorithms to table if they already exist.
1350 Sort table on each new add. This effectively makes the table read only
1351 after all algorithms are added and subsequent calls to PKCS12_pbe_add
1355 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
1357 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
1360 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
1361 access or freeing data twice (CVE-2010-0742)
1362 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
1364 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
1365 common in certificates and some applications which only call
1366 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
1370 Reduce copying into .apps and .test in makevms.com
1371 Don't try to use blank CA certificate in CA.com
1372 Allow use of C files from original directories in maketests.com
1373 [Steven M. Schweda" <sms@antinode.info>]
1375 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
1377 *) When rejecting SSL/TLS records due to an incorrect version number, never
1378 update s->server with a new major version number. As of
1379 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
1380 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
1381 the previous behavior could result in a read attempt at NULL when
1382 receiving specific incorrect SSL/TLS records once record payload
1383 protection is active. (CVE-2010-0740)
1384 [Bodo Moeller, Adam Langley <agl@chromium.org>]
1386 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
1387 could be crashed if the relevant tables were not present (e.g. chrooted).
1388 [Tomas Hoger <thoger@redhat.com>]
1390 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
1392 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
1393 [Martin Olsson, Neel Mehta]
1395 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
1396 accommodate for stack sorting, always a write lock!).
1399 *) On some versions of WIN32 Heap32Next is very slow. This can cause
1400 excessive delays in the RAND_poll(): over a minute. As a workaround
1401 include a time check in the inner Heap32Next loop too.
1404 *) The code that handled flushing of data in SSL/TLS originally used the
1405 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
1406 the problem outlined in PR#1949. The fix suggested there however can
1407 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
1408 of Apache). So instead simplify the code to flush unconditionally.
1409 This should be fine since flushing with no data to flush is a no op.
1412 *) Handle TLS versions 2.0 and later properly and correctly use the
1413 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
1414 off ancient servers have a habit of sticking around for a while...
1417 *) Modify compression code so it frees up structures without using the
1418 ex_data callbacks. This works around a problem where some applications
1419 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
1420 restarting) then use compression (e.g. SSL with compression) later.
1421 This results in significant per-connection memory leaks and
1422 has caused some security issues including CVE-2008-1678 and
1426 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
1427 change when encrypting or decrypting.
1430 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
1431 connect and renegotiate with servers which do not support RI.
1432 Until RI is more widely deployed this option is enabled by default.
1435 *) Add "missing" ssl ctrls to clear options and mode.
1438 *) If client attempts to renegotiate and doesn't support RI respond with
1439 a no_renegotiation alert as required by RFC5746. Some renegotiating
1440 TLS clients will continue a connection gracefully when they receive
1441 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1442 waiting for a server hello which it will never receive. Now we treat a
1443 received no_renegotiation alert as a fatal error. This is because
1444 applications requesting a renegotiation might well expect it to succeed
1445 and would have no code in place to handle the server denying it so the
1446 only safe thing to do is to terminate the connection.
1449 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1450 peer supports secure renegotiation and 0 otherwise. Print out peer
1451 renegotiation support in s_client/s_server.
1454 *) Replace the highly broken and deprecated SPKAC certification method with
1455 the updated NID creation version. This should correctly handle UTF8.
1458 *) Implement RFC5746. Re-enable renegotiation but require the extension
1459 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1460 turns out to be a bad idea. It has been replaced by
1461 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1462 SSL_CTX_set_options(). This is really not recommended unless you
1463 know what you are doing.
1464 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1466 *) Fixes to stateless session resumption handling. Use initial_ctx when
1467 issuing and attempting to decrypt tickets in case it has changed during
1468 servername handling. Use a non-zero length session ID when attempting
1469 stateless session resumption: this makes it possible to determine if
1470 a resumption has occurred immediately after receiving server hello
1471 (several places in OpenSSL subtly assume this) instead of later in
1475 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1476 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1477 fixes for a few places where the return code is not checked
1479 [Julia Lawall <julia@diku.dk>]
1481 *) Add --strict-warnings option to Configure script to include devteam
1482 warnings in other configurations.
1485 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1486 makes it possible to install openssl libraries in locations which
1487 have names other than "lib", for example "/usr/lib64" which some
1489 [Steve Henson, based on patch from Jeremy Utley]
1491 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1492 X690 8.9.12 and can produce some misleading textual output of OIDs.
1493 [Steve Henson, reported by Dan Kaminsky]
1495 *) Delete MD2 from algorithm tables. This follows the recommendation in
1496 several standards that it is not used in new applications due to
1497 several cryptographic weaknesses. For binary compatibility reasons
1498 the MD2 API is still compiled in by default.
1501 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1505 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1506 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1508 [Guenter <lists@gknw.net>]
1510 *) Fix the server certificate chain building code to use X509_verify_cert(),
1511 it used to have an ad-hoc builder which was unable to cope with anything
1512 other than a simple chain.
1513 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1515 *) Don't check self signed certificate signatures in X509_verify_cert()
1516 by default (a flag can override this): it just wastes time without
1517 adding any security. As a useful side effect self signed root CAs
1518 with non-FIPS digests are now usable in FIPS mode.
1521 *) In dtls1_process_out_of_seq_message() the check if the current message
1522 is already buffered was missing. For every new message was memory
1523 allocated, allowing an attacker to perform an denial of service attack
1524 with sending out of seq handshake messages until there is no memory
1525 left. Additionally every future messege was buffered, even if the
1526 sequence number made no sense and would be part of another handshake.
1527 So only messages with sequence numbers less than 10 in advance will be
1528 buffered. (CVE-2009-1378)
1529 [Robin Seggelmann, discovered by Daniel Mentz]
1531 *) Records are buffered if they arrive with a future epoch to be
1532 processed after finishing the corresponding handshake. There is
1533 currently no limitation to this buffer allowing an attacker to perform
1534 a DOS attack with sending records with future epochs until there is no
1535 memory left. This patch adds the pqueue_size() function to detemine
1536 the size of a buffer and limits the record buffer to 100 entries.
1538 [Robin Seggelmann, discovered by Daniel Mentz]
1540 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
1541 parent structure is freed. (CVE-2009-1379)
1544 *) Handle non-blocking I/O properly in SSL_shutdown() call.
1545 [Darryl Miles <darryl-mailinglists@netbauds.net>]
1548 [Ilya O. <vrghost@gmail.com>]
1550 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
1552 *) Disable renegotiation completely - this fixes a severe security
1553 problem (CVE-2009-3555) at the cost of breaking all
1554 renegotiation. Renegotiation can be re-enabled by setting
1555 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
1556 run-time. This is really not recommended unless you know what
1560 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
1562 *) Don't set val to NULL when freeing up structures, it is freed up by
1563 underlying code. If sizeof(void *) > sizeof(long) this can result in
1564 zeroing past the valid field. (CVE-2009-0789)
1565 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
1567 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
1568 checked correctly. This would allow some invalid signed attributes to
1569 appear to verify correctly. (CVE-2009-0591)
1570 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1572 *) Reject UniversalString and BMPString types with invalid lengths. This
1573 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
1574 a legal length. (CVE-2009-0590)
1577 *) Set S/MIME signing as the default purpose rather than setting it
1578 unconditionally. This allows applications to override it at the store
1582 *) Permit restricted recursion of ASN1 strings. This is needed in practice
1583 to handle some structures.
1586 *) Improve efficiency of mem_gets: don't search whole buffer each time
1588 [Jeremy Shapiro <jnshapir@us.ibm.com>]
1590 *) New -hex option for openssl rand.
1593 *) Print out UTF8String and NumericString when parsing ASN1.
1596 *) Support NumericString type for name components.
1599 *) Allow CC in the environment to override the automatically chosen
1600 compiler. Note that nothing is done to ensure flags work with the
1604 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
1606 *) Properly check EVP_VerifyFinal() and similar return values
1608 [Ben Laurie, Bodo Moeller, Google Security Team]
1610 *) Enable TLS extensions by default.
1613 *) Allow the CHIL engine to be loaded, whether the application is
1614 multithreaded or not. (This does not release the developer from the
1615 obligation to set up the dynamic locking callbacks.)
1616 [Sander Temme <sander@temme.net>]
1618 *) Use correct exit code if there is an error in dgst command.
1619 [Steve Henson; problem pointed out by Roland Dirlewanger]
1621 *) Tweak Configure so that you need to say "experimental-jpake" to enable
1622 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
1625 *) Add experimental JPAKE support, including demo authentication in
1626 s_client and s_server.
1629 *) Set the comparison function in v3_addr_canonize().
1630 [Rob Austein <sra@hactrn.net>]
1632 *) Add support for XMPP STARTTLS in s_client.
1633 [Philip Paeps <philip@freebsd.org>]
1635 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
1636 to ensure that even with this option, only ciphersuites in the
1637 server's preference list will be accepted. (Note that the option
1638 applies only when resuming a session, so the earlier behavior was
1639 just about the algorithm choice for symmetric cryptography.)
1642 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
1644 *) Fix NULL pointer dereference if a DTLS server received
1645 ChangeCipherSpec as first record (CVE-2009-1386).
1648 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
1649 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
1652 *) The fix in 0.9.8c that supposedly got rid of unsafe
1653 double-checked locking was incomplete for RSA blinding,
1654 addressing just one layer of what turns out to have been
1655 doubly unsafe triple-checked locking.
1657 So now fix this for real by retiring the MONT_HELPER macro
1658 in crypto/rsa/rsa_eay.c.
1660 [Bodo Moeller; problem pointed out by Marius Schilder]
1662 *) Various precautionary measures:
1664 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
1666 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
1667 (NB: This would require knowledge of the secret session ticket key
1668 to exploit, in which case you'd be SOL either way.)
1670 - Change bn_nist.c so that it will properly handle input BIGNUMs
1671 outside the expected range.
1673 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
1676 [Neel Mehta, Bodo Moeller]
1678 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
1679 the load fails. Useful for distros.
1680 [Ben Laurie and the FreeBSD team]
1682 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
1685 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
1688 *) Expand ENGINE to support engine supplied SSL client certificate functions.
1690 This work was sponsored by Logica.
1693 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
1694 keystores. Support for SSL/TLS client authentication too.
1695 Not compiled unless enable-capieng specified to Configure.
1697 This work was sponsored by Logica.
1700 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
1701 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
1702 attribute creation routines such as certifcate requests and PKCS#12
1706 Changes between 0.9.8g and 0.9.8h [28 May 2008]
1708 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
1709 handshake which could lead to a cilent crash as found using the
1710 Codenomicon TLS test suite (CVE-2008-1672)
1711 [Steve Henson, Mark Cox]
1713 *) Fix double free in TLS server name extensions which could lead to
1714 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
1717 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
1719 Clear the error queue to ensure that error entries left from
1720 older function calls do not interfere with the correct operation.
1721 [Lutz Jaenicke, Erik de Castro Lopo]
1723 *) Remove root CA certificates of commercial CAs:
1725 The OpenSSL project does not recommend any specific CA and does not
1726 have any policy with respect to including or excluding any CA.
1727 Therefore it does not make any sense to ship an arbitrary selection
1728 of root CA certificates with the OpenSSL software.
1731 *) RSA OAEP patches to fix two separate invalid memory reads.
1732 The first one involves inputs when 'lzero' is greater than
1733 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
1734 before the beginning of from). The second one involves inputs where
1735 the 'db' section contains nothing but zeroes (there is a one-byte
1736 invalid read after the end of 'db').
1737 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1739 *) Partial backport from 0.9.9-dev:
1741 Introduce bn_mul_mont (dedicated Montgomery multiplication
1742 procedure) as a candidate for BIGNUM assembler implementation.
1743 While 0.9.9-dev uses assembler for various architectures, only
1744 x86_64 is available by default here in the 0.9.8 branch, and
1745 32-bit x86 is available through a compile-time setting.
1747 To try the 32-bit x86 assembler implementation, use Configure
1748 option "enable-montasm" (which exists only for this backport).
1750 As "enable-montasm" for 32-bit x86 disclaims code stability
1751 anyway, in this constellation we activate additional code
1752 backported from 0.9.9-dev for further performance improvements,
1753 namely BN_from_montgomery_word. (To enable this otherwise,
1754 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
1756 [Andy Polyakov (backport partially by Bodo Moeller)]
1758 *) Add TLS session ticket callback. This allows an application to set
1759 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
1760 values. This is useful for key rollover for example where several key
1761 sets may exist with different names.
1764 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
1765 This was broken until now in 0.9.8 releases, such that the only way
1766 a registered ENGINE could be used (assuming it initialises
1767 successfully on the host) was to explicitly set it as the default
1768 for the relevant algorithms. This is in contradiction with 0.9.7
1769 behaviour and the documentation. With this fix, when an ENGINE is
1770 registered into a given algorithm's table of implementations, the
1771 'uptodate' flag is reset so that auto-discovery will be used next
1772 time a new context for that algorithm attempts to select an
1774 [Ian Lister (tweaked by Geoff Thorpe)]
1776 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
1777 implemention in the following ways:
1779 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
1782 Lack of BER streaming support means one pass streaming processing is
1783 only supported if data is detached: setting the streaming flag is
1784 ignored for embedded content.
1786 CMS support is disabled by default and must be explicitly enabled
1787 with the enable-cms configuration option.
1790 *) Update the GMP engine glue to do direct copies between BIGNUM and
1791 mpz_t when openssl and GMP use the same limb size. Otherwise the
1792 existing "conversion via a text string export" trick is still used.
1793 [Paul Sheer <paulsheer@gmail.com>]
1795 *) Zlib compression BIO. This is a filter BIO which compressed and
1796 uncompresses any data passed through it.
1799 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
1800 RFC3394 compatible AES key wrapping.
1803 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
1804 sets string data without copying. X509_ALGOR_set0() and
1805 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
1806 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
1807 from an X509_ATTRIBUTE structure optionally checking it occurs only
1808 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
1812 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
1813 to get the expected BN_FLG_CONSTTIME behavior.
1814 [Bodo Moeller (Google)]
1818 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
1819 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
1820 - added some more tests to do_tests.pl
1821 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
1822 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
1823 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
1824 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
1825 - various changes to netware.pl to enable gcc-cross builds on Win32
1827 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
1828 - various changes to fix missing prototype warnings
1829 - fixed x86nasm.pl to create correct asm files for NASM COFF output
1830 - added AES, WHIRLPOOL and CPUID assembler code to build files
1831 - added missing AES assembler make rules to mk1mf.pl
1832 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
1833 [Guenter Knauf <eflash@gmx.net>]
1835 *) Implement certificate status request TLS extension defined in RFC3546.
1836 A client can set the appropriate parameters and receive the encoded
1837 OCSP response via a callback. A server can query the supplied parameters
1838 and set the encoded OCSP response in the callback. Add simplified examples
1839 to s_client and s_server.
1842 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
1844 *) Fix various bugs:
1845 + Binary incompatibility of ssl_ctx_st structure
1846 + DTLS interoperation with non-compliant servers
1847 + Don't call get_session_cb() without proposed session
1848 + Fix ia64 assembler code
1849 [Andy Polyakov, Steve Henson]
1851 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
1853 *) DTLS Handshake overhaul. There were longstanding issues with
1854 OpenSSL DTLS implementation, which were making it impossible for
1855 RFC 4347 compliant client to communicate with OpenSSL server.
1856 Unfortunately just fixing these incompatibilities would "cut off"
1857 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
1858 server keeps tolerating non RFC compliant syntax. The opposite is
1859 not true, 0.9.8f client can not communicate with earlier server.
1860 This update even addresses CVE-2007-4995.
1863 *) Changes to avoid need for function casts in OpenSSL: some compilers
1864 (gcc 4.2 and later) reject their use.
1865 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
1868 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1869 RFC4507bis. The encrypted ticket format is an encrypted encoded
1870 SSL_SESSION structure, that way new session features are automatically
1873 If a client application caches session in an SSL_SESSION structure
1874 support is transparent because tickets are now stored in the encoded
1877 The SSL_CTX structure automatically generates keys for ticket
1878 protection in servers so again support should be possible
1879 with no application modification.
1881 If a client or server wishes to disable RFC4507 support then the option
1882 SSL_OP_NO_TICKET can be set.
1884 Add a TLS extension debugging callback to allow the contents of any client
1885 or server extensions to be examined.
1887 This work was sponsored by Google.
1890 *) Add initial support for TLS extensions, specifically for the server_name
1891 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1892 have new members for a host name. The SSL data structure has an
1893 additional member SSL_CTX *initial_ctx so that new sessions can be
1894 stored in that context to allow for session resumption, even after the
1895 SSL has been switched to a new SSL_CTX in reaction to a client's
1896 server_name extension.
1898 New functions (subject to change):
1900 SSL_get_servername()
1901 SSL_get_servername_type()
1904 New CTRL codes and macros (subject to change):
1906 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1907 - SSL_CTX_set_tlsext_servername_callback()
1908 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1909 - SSL_CTX_set_tlsext_servername_arg()
1910 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1912 openssl s_client has a new '-servername ...' option.
1914 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1915 '-key2 ...', '-servername_fatal' (subject to change). This allows
1916 testing the HostName extension for a specific single host name ('-cert'
1917 and '-key' remain fallbacks for handshakes without HostName
1918 negotiation). If the unrecogninzed_name alert has to be sent, this by
1919 default is a warning; it becomes fatal with the '-servername_fatal'
1922 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
1924 *) Add AES and SSE2 assembly language support to VC++ build.
1927 *) Mitigate attack on final subtraction in Montgomery reduction.
1930 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
1931 (which previously caused an internal error).
1934 *) Squeeze another 10% out of IGE mode when in != out.
1937 *) AES IGE mode speedup.
1938 [Dean Gaudet (Google)]
1940 *) Add the Korean symmetric 128-bit cipher SEED (see
1941 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
1942 add SEED ciphersuites from RFC 4162:
1944 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
1945 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
1946 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
1947 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
1949 To minimize changes between patchlevels in the OpenSSL 0.9.8
1950 series, SEED remains excluded from compilation unless OpenSSL
1951 is configured with 'enable-seed'.
1952 [KISA, Bodo Moeller]
1954 *) Mitigate branch prediction attacks, which can be practical if a
1955 single processor is shared, allowing a spy process to extract
1956 information. For detailed background information, see
1957 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
1958 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
1959 and Necessary Software Countermeasures"). The core of the change
1960 are new versions BN_div_no_branch() and
1961 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
1962 respectively, which are slower, but avoid the security-relevant
1963 conditional branches. These are automatically called by BN_div()
1964 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
1965 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
1966 remove a conditional branch.
1968 BN_FLG_CONSTTIME is the new name for the previous
1969 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
1970 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
1971 in the exponent causes BN_mod_exp_mont() to use the alternative
1972 implementation in BN_mod_exp_mont_consttime().) The old name
1973 remains as a deprecated alias.
1975 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
1976 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
1977 constant-time implementations for more than just exponentiation.
1978 Here too the old name is kept as a deprecated alias.
1980 BN_BLINDING_new() will now use BN_dup() for the modulus so that
1981 the BN_BLINDING structure gets an independent copy of the
1982 modulus. This means that the previous "BIGNUM *m" argument to
1983 BN_BLINDING_new() and to BN_BLINDING_create_param() now
1984 essentially becomes "const BIGNUM *m", although we can't actually
1985 change this in the header file before 0.9.9. It allows
1986 RSA_setup_blinding() to use BN_with_flags() on the modulus to
1987 enable BN_FLG_CONSTTIME.
1989 [Matthew D Wood (Intel Corp)]
1991 *) In the SSL/TLS server implementation, be strict about session ID
1992 context matching (which matters if an application uses a single
1993 external cache for different purposes). Previously,
1994 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
1995 set. This did ensure strict client verification, but meant that,
1996 with applications using a single external cache for quite
1997 different requirements, clients could circumvent ciphersuite
1998 restrictions for a given session ID context by starting a session
1999 in a different context.
2002 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2003 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2004 authentication-only ciphersuites.
2007 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
2008 not complete and could lead to a possible single byte overflow
2009 (CVE-2007-5135) [Ben Laurie]
2011 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
2013 *) Since AES128 and AES256 (and similarly Camellia128 and
2014 Camellia256) share a single mask bit in the logic of
2015 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2016 kludge to work properly if AES128 is available and AES256 isn't
2017 (or if Camellia128 is available and Camellia256 isn't).
2020 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
2021 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
2022 When a point or a seed is encoded in a BIT STRING, we need to
2023 prevent the removal of trailing zero bits to get the proper DER
2024 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
2025 of a NamedBitList, for which trailing 0 bits need to be removed.)
2028 *) Have SSL/TLS server implementation tolerate "mismatched" record
2029 protocol version while receiving ClientHello even if the
2030 ClientHello is fragmented. (The server can't insist on the
2031 particular protocol version it has chosen before the ServerHello
2032 message has informed the client about his choice.)
2035 *) Add RFC 3779 support.
2036 [Rob Austein for ARIN, Ben Laurie]
2038 *) Load error codes if they are not already present instead of using a
2039 static variable. This allows them to be cleanly unloaded and reloaded.
2040 Improve header file function name parsing.
2043 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
2044 or CAPABILITY handshake as required by RFCs.
2047 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
2049 *) Introduce limits to prevent malicious keys being able to
2050 cause a denial of service. (CVE-2006-2940)
2051 [Steve Henson, Bodo Moeller]
2053 *) Fix ASN.1 parsing of certain invalid structures that can result
2054 in a denial of service. (CVE-2006-2937) [Steve Henson]
2056 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2057 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2059 *) Fix SSL client code which could crash if connecting to a
2060 malicious SSLv2 server. (CVE-2006-4343)
2061 [Tavis Ormandy and Will Drewry, Google Security Team]
2063 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
2064 match only those. Before that, "AES256-SHA" would be interpreted
2065 as a pattern and match "AES128-SHA" too (since AES128-SHA got
2066 the same strength classification in 0.9.7h) as we currently only
2067 have a single AES bit in the ciphersuite description bitmap.
2068 That change, however, also applied to ciphersuite strings such as
2069 "RC4-MD5" that intentionally matched multiple ciphersuites --
2070 namely, SSL 2.0 ciphersuites in addition to the more common ones
2071 from SSL 3.0/TLS 1.0.
2073 So we change the selection algorithm again: Naming an explicit
2074 ciphersuite selects this one ciphersuite, and any other similar
2075 ciphersuite (same bitmap) from *other* protocol versions.
2076 Thus, "RC4-MD5" again will properly select both the SSL 2.0
2077 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
2079 Since SSL 2.0 does not have any ciphersuites for which the
2080 128/256 bit distinction would be relevant, this works for now.
2081 The proper fix will be to use different bits for AES128 and
2082 AES256, which would have avoided the problems from the beginning;
2083 however, bits are scarce, so we can only do this in a new release
2084 (not just a patchlevel) when we can change the SSL_CIPHER
2085 definition to split the single 'unsigned long mask' bitmap into
2086 multiple values to extend the available space.
2090 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
2092 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2093 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2095 *) Add AES IGE and biIGE modes.
2098 *) Change the Unix randomness entropy gathering to use poll() when
2099 possible instead of select(), since the latter has some
2100 undesirable limitations.
2101 [Darryl Miles via Richard Levitte and Bodo Moeller]
2103 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
2104 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
2105 cannot be implicitly activated as part of, e.g., the "AES" alias.
2106 However, please upgrade to OpenSSL 0.9.9[-dev] for
2107 non-experimental use of the ECC ciphersuites to get TLS extension
2108 support, which is required for curve and point format negotiation
2109 to avoid potential handshake problems.
2112 *) Disable rogue ciphersuites:
2114 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
2115 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
2116 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
2118 The latter two were purportedly from
2119 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
2122 Also deactivate the remaining ciphersuites from
2123 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
2124 unofficial, and the ID has long expired.
2127 *) Fix RSA blinding Heisenbug (problems sometimes occured on
2128 dual-core machines) and other potential thread-safety issues.
2131 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
2132 versions), which is now available for royalty-free use
2133 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
2134 Also, add Camellia TLS ciphersuites from RFC 4132.
2136 To minimize changes between patchlevels in the OpenSSL 0.9.8
2137 series, Camellia remains excluded from compilation unless OpenSSL
2138 is configured with 'enable-camellia'.
2141 *) Disable the padding bug check when compression is in use. The padding
2142 bug check assumes the first packet is of even length, this is not
2143 necessarily true if compresssion is enabled and can result in false
2144 positives causing handshake failure. The actual bug test is ancient
2145 code so it is hoped that implementations will either have fixed it by
2146 now or any which still have the bug do not support compression.
2149 Changes between 0.9.8a and 0.9.8b [04 May 2006]
2151 *) When applying a cipher rule check to see if string match is an explicit
2152 cipher suite and only match that one cipher suite if it is.
2155 *) Link in manifests for VC++ if needed.
2156 [Austin Ziegler <halostatue@gmail.com>]
2158 *) Update support for ECC-based TLS ciphersuites according to
2159 draft-ietf-tls-ecc-12.txt with proposed changes (but without
2160 TLS extensions, which are supported starting with the 0.9.9
2161 branch, not in the OpenSSL 0.9.8 branch).
2164 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
2165 opaque EVP_CIPHER_CTX handling.
2168 *) Fixes and enhancements to zlib compression code. We now only use
2169 "zlib1.dll" and use the default __cdecl calling convention on Win32
2170 to conform with the standards mentioned here:
2171 http://www.zlib.net/DLL_FAQ.txt
2172 Static zlib linking now works on Windows and the new --with-zlib-include
2173 --with-zlib-lib options to Configure can be used to supply the location
2174 of the headers and library. Gracefully handle case where zlib library
2178 *) Several fixes and enhancements to the OID generation code. The old code
2179 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
2180 handle numbers larger than ULONG_MAX, truncated printing and had a
2181 non standard OBJ_obj2txt() behaviour.
2184 *) Add support for building of engines under engine/ as shared libraries
2185 under VC++ build system.
2188 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
2189 Hopefully, we will not see any false combination of paths any more.
2192 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
2194 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2195 (part of SSL_OP_ALL). This option used to disable the
2196 countermeasure against man-in-the-middle protocol-version
2197 rollback in the SSL 2.0 server implementation, which is a bad
2198 idea. (CVE-2005-2969)
2200 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2201 for Information Security, National Institute of Advanced Industrial
2202 Science and Technology [AIST], Japan)]
2204 *) Add two function to clear and return the verify parameter flags.
2207 *) Keep cipherlists sorted in the source instead of sorting them at
2208 runtime, thus removing the need for a lock.
2211 *) Avoid some small subgroup attacks in Diffie-Hellman.
2212 [Nick Mathewson and Ben Laurie]
2214 *) Add functions for well-known primes.
2217 *) Extended Windows CE support.
2218 [Satoshi Nakamura and Andy Polyakov]
2220 *) Initialize SSL_METHOD structures at compile time instead of during
2221 runtime, thus removing the need for a lock.
2224 *) Make PKCS7_decrypt() work even if no certificate is supplied by
2225 attempting to decrypt each encrypted key in turn. Add support to
2229 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
2231 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
2234 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
2237 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
2238 key into the same file any more.
2241 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
2244 *) Add -utf8 command line and config file option to 'ca'.
2245 [Stefan <stf@udoma.org]
2247 *) Removed the macro des_crypt(), as it seems to conflict with some
2248 libraries. Use DES_crypt().
2251 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
2252 involves renaming the source and generated shared-libs for
2253 both. The engines will accept the corrected or legacy ids
2254 ('ncipher' and '4758_cca' respectively) when binding. NB,
2255 this only applies when building 'shared'.
2256 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
2258 *) Add attribute functions to EVP_PKEY structure. Modify
2259 PKCS12_create() to recognize a CSP name attribute and
2260 use it. Make -CSP option work again in pkcs12 utility.
2263 *) Add new functionality to the bn blinding code:
2264 - automatic re-creation of the BN_BLINDING parameters after
2265 a fixed number of uses (currently 32)
2266 - add new function for parameter creation
2267 - introduce flags to control the update behaviour of the
2268 BN_BLINDING parameters
2269 - hide BN_BLINDING structure
2270 Add a second BN_BLINDING slot to the RSA structure to improve
2271 performance when a single RSA object is shared among several
2275 *) Add support for DTLS.
2276 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
2278 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
2279 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
2282 *) Remove buggy and incompletet DH cert support from
2283 ssl/ssl_rsa.c and ssl/s3_both.c
2286 *) Use SHA-1 instead of MD5 as the default digest algorithm for
2287 the apps/openssl applications.
2290 *) Compile clean with "-Wall -Wmissing-prototypes
2291 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
2292 DEBUG_SAFESTACK must also be set.
2295 *) Change ./Configure so that certain algorithms can be disabled by default.
2296 The new counterpiece to "no-xxx" is "enable-xxx".
2298 The patented RC5 and MDC2 algorithms will now be disabled unless
2299 "enable-rc5" and "enable-mdc2", respectively, are specified.
2301 (IDEA remains enabled despite being patented. This is because IDEA
2302 is frequently required for interoperability, and there is no license
2303 fee for non-commercial use. As before, "no-idea" can be used to
2304 avoid this algorithm.)
2308 *) Add processing of proxy certificates (see RFC 3820). This work was
2309 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
2310 EGEE (Enabling Grids for E-science in Europe).
2313 *) RC4 performance overhaul on modern architectures/implementations, such
2314 as Intel P4, IA-64 and AMD64.
2317 *) New utility extract-section.pl. This can be used specify an alternative
2318 section number in a pod file instead of having to treat each file as
2319 a separate case in Makefile. This can be done by adding two lines to the
2322 =for comment openssl_section:XXX
2324 The blank line is mandatory.
2328 *) New arguments -certform, -keyform and -pass for s_client and s_server
2329 to allow alternative format key and certificate files and passphrase
2333 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
2334 update associated structures and add various utility functions.
2336 Add new policy related verify parameters, include policy checking in
2337 standard verify code. Enhance 'smime' application with extra parameters
2338 to support policy checking and print out.
2341 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
2342 Nehemiah processors. These extensions support AES encryption in hardware
2343 as well as RNG (though RNG support is currently disabled).
2344 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
2346 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
2349 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
2350 [Andy Polyakov and a number of other people]
2352 *) Improved PowerPC platform support. Most notably BIGNUM assembler
2353 implementation contributed by IBM.
2354 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
2356 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
2357 exponent rather than 'unsigned long'. There is a corresponding change to
2358 the new 'rsa_keygen' element of the RSA_METHOD structure.
2359 [Jelte Jansen, Geoff Thorpe]
2361 *) Functionality for creating the initial serial number file is now
2362 moved from CA.pl to the 'ca' utility with a new option -create_serial.
2364 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
2365 number file to 1, which is bound to cause problems. To avoid
2366 the problems while respecting compatibility between different 0.9.7
2367 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
2368 CA.pl for serial number initialization. With the new release 0.9.8,
2369 we can fix the problem directly in the 'ca' utility.)
2372 *) Reduced header interdepencies by declaring more opaque objects in
2373 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
2374 give fewer recursive includes, which could break lazy source code - so
2375 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
2376 developers should define this symbol when building and using openssl to
2377 ensure they track the recommended behaviour, interfaces, [etc], but
2378 backwards-compatible behaviour prevails when this isn't defined.
2381 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
2384 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
2385 This will generate a random key of the appropriate length based on the
2386 cipher context. The EVP_CIPHER can provide its own random key generation
2387 routine to support keys of a specific form. This is used in the des and
2388 3des routines to generate a key of the correct parity. Update S/MIME
2389 code to use new functions and hence generate correct parity DES keys.
2390 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
2391 valid (weak or incorrect parity).
2394 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
2395 as looking them up. This is useful when the verified structure may contain
2396 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
2397 present unless the new PKCS7_NO_CRL flag is asserted.
2400 *) Extend ASN1 oid configuration module. It now additionally accepts the
2403 shortName = some long name, 1.2.3.4
2406 *) Reimplemented the BN_CTX implementation. There is now no more static
2407 limitation on the number of variables it can handle nor the depth of the
2408 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
2409 information can now expand as required, and rather than having a single
2410 static array of bignums, BN_CTX now uses a linked-list of such arrays
2411 allowing it to expand on demand whilst maintaining the usefulness of
2412 BN_CTX's "bundling".
2415 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
2416 to allow all RSA operations to function using a single BN_CTX.
2419 *) Preliminary support for certificate policy evaluation and checking. This
2420 is initially intended to pass the tests outlined in "Conformance Testing
2421 of Relying Party Client Certificate Path Processing Logic" v1.07.
2424 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
2425 remained unused and not that useful. A variety of other little bignum
2426 tweaks and fixes have also been made continuing on from the audit (see
2430 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
2431 associated ASN1, EVP and SSL functions and old ASN1 macros.
2434 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
2435 and this should never fail. So the return value from the use of
2436 BN_set_word() (which can fail due to needless expansion) is now deprecated;
2437 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
2440 *) BN_CTX_get() should return zero-valued bignums, providing the same
2441 initialised value as BN_new().
2442 [Geoff Thorpe, suggested by Ulf Möller]
2444 *) Support for inhibitAnyPolicy certificate extension.
2447 *) An audit of the BIGNUM code is underway, for which debugging code is
2448 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2449 is considered valid when processing BIGNUMs, and causes execution to
2450 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2451 further steps are taken to deliberately pollute unused data in BIGNUM
2452 structures to try and expose faulty code further on. For now, openssl will
2453 (in its default mode of operation) continue to tolerate the inconsistent
2454 forms that it has tolerated in the past, but authors and packagers should
2455 consider trying openssl and their own applications when compiled with
2456 these debugging symbols defined. It will help highlight potential bugs in
2457 their own code, and will improve the test coverage for OpenSSL itself. At
2458 some point, these tighter rules will become openssl's default to improve
2459 maintainability, though the assert()s and other overheads will remain only
2460 in debugging configurations. See bn.h for more details.
2461 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2463 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2464 that can only be obtained through BN_CTX_new() (which implicitly
2465 initialises it). The presence of this function only made it possible
2466 to overwrite an existing structure (and cause memory leaks).
2469 *) Because of the callback-based approach for implementing LHASH as a
2470 template type, lh_insert() adds opaque objects to hash-tables and
2471 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2472 to clean up those corresponding objects before destroying the hash table
2473 (and losing the object pointers). So some over-zealous constifications in
2474 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2475 objects as "const" and the lh_doall[_arg] callback wrappers are not
2476 prototyped to have "const" restrictions on the object pointers they are
2477 given (and so aren't required to cast them away any more).
2480 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2481 (speed) prefers to use its own implementation. The two implementations
2482 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2483 its object type properly exposed (MS_TM) instead of casting to/from "char
2484 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2485 aren't necessarily the greatest nomenclatures - but this is what was used
2486 internally to the implementation so I've used that for now.
2489 *) Ensure that deprecated functions do not get compiled when
2490 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2491 the self-tests were still using deprecated key-generation functions so
2492 these have been updated also.
2495 *) Reorganise PKCS#7 code to separate the digest location functionality
2496 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2497 New function PKCS7_set_digest() to set the digest type for PKCS#7
2498 digestedData type. Add additional code to correctly generate the
2499 digestedData type and add support for this type in PKCS7 initialization
2503 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2504 structure of type "other".
2507 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2508 sure the loop does correctly stop and breaking ("division by zero")
2509 modulus operations are not performed. The (pre-generated) prime
2510 table crypto/bn/bn_prime.h was already correct, but it could not be
2511 re-generated on some platforms because of the "division by zero"
2512 situation in the script.
2513 [Ralf S. Engelschall]
2515 *) Update support for ECC-based TLS ciphersuites according to
2516 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2517 SHA-1 now is only used for "small" curves (where the
2518 representation of a field element takes up to 24 bytes); for
2519 larger curves, the field element resulting from ECDH is directly
2520 used as premaster secret.
2521 [Douglas Stebila (Sun Microsystems Laboratories)]
2523 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2524 curve secp160r1 to the tests.
2525 [Douglas Stebila (Sun Microsystems Laboratories)]
2527 *) Add the possibility to load symbols globally with DSO.
2528 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
2530 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
2531 control of the error stack.
2534 *) Add support for STORE in ENGINE.
2537 *) Add the STORE type. The intention is to provide a common interface
2538 to certificate and key stores, be they simple file-based stores, or
2539 HSM-type store, or LDAP stores, or...
2540 NOTE: The code is currently UNTESTED and isn't really used anywhere.
2543 *) Add a generic structure called OPENSSL_ITEM. This can be used to
2544 pass a list of arguments to any function as well as provide a way
2545 for a function to pass data back to the caller.
2548 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
2549 works like BUF_strdup() but can be used to duplicate a portion of
2550 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
2554 *) Add the function sk_find_ex() which works like sk_find(), but will
2555 return an index to an element even if an exact match couldn't be
2556 found. The index is guaranteed to point at the element where the
2557 searched-for key would be inserted to preserve sorting order.
2560 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
2561 takes an extra flags argument for optional functionality. Currently,
2562 the following flags are defined:
2564 OBJ_BSEARCH_VALUE_ON_NOMATCH
2565 This one gets OBJ_bsearch_ex() to return a pointer to the first
2566 element where the comparing function returns a negative or zero
2569 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
2570 This one gets OBJ_bsearch_ex() to return a pointer to the first
2571 element where the comparing function returns zero. This is useful
2572 if there are more than one element where the comparing function
2576 *) Make it possible to create self-signed certificates with 'openssl ca'
2577 in such a way that the self-signed certificate becomes part of the
2578 CA database and uses the same mechanisms for serial number generation
2579 as all other certificate signing. The new flag '-selfsign' enables
2580 this functionality. Adapt CA.sh and CA.pl.in.
2583 *) Add functionality to check the public key of a certificate request
2584 against a given private. This is useful to check that a certificate
2585 request can be signed by that key (self-signing).
2588 *) Make it possible to have multiple active certificates with the same
2589 subject in the CA index file. This is done only if the keyword
2590 'unique_subject' is set to 'no' in the main CA section (default
2591 if 'CA_default') of the configuration file. The value is saved
2592 with the database itself in a separate index attribute file,
2593 named like the index file with '.attr' appended to the name.
2596 *) Generate muti valued AVAs using '+' notation in config files for
2600 *) Support for nameConstraints certificate extension.
2603 *) Support for policyConstraints certificate extension.
2606 *) Support for policyMappings certificate extension.
2609 *) Make sure the default DSA_METHOD implementation only uses its
2610 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
2611 and change its own handlers to be NULL so as to remove unnecessary
2612 indirection. This lets alternative implementations fallback to the
2613 default implementation more easily.
2616 *) Support for directoryName in GeneralName related extensions
2620 *) Make it possible to link applications using Makefile.shared.
2621 Make that possible even when linking against static libraries!
2624 *) Support for single pass processing for S/MIME signing. This now
2625 means that S/MIME signing can be done from a pipe, in addition
2626 cleartext signing (multipart/signed type) is effectively streaming
2627 and the signed data does not need to be all held in memory.
2629 This is done with a new flag PKCS7_STREAM. When this flag is set
2630 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
2631 is done after the data is output (and digests calculated) in
2632 SMIME_write_PKCS7().
2635 *) Add full support for -rpath/-R, both in shared libraries and
2636 applications, at least on the platforms where it's known how
2640 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
2641 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
2642 will now compute a table of multiples of the generator that
2643 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
2644 faster (notably in the case of a single point multiplication,
2645 scalar * generator).
2646 [Nils Larsch, Bodo Moeller]
2648 *) IPv6 support for certificate extensions. The various extensions
2649 which use the IP:a.b.c.d can now take IPv6 addresses using the
2650 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
2654 *) Added an ENGINE that implements RSA by performing private key
2655 exponentiations with the GMP library. The conversions to and from
2656 GMP's mpz_t format aren't optimised nor are any montgomery forms
2657 cached, and on x86 it appears OpenSSL's own performance has caught up.
2658 However there are likely to be other architectures where GMP could
2659 provide a boost. This ENGINE is not built in by default, but it can be
2660 specified at Configure time and should be accompanied by the necessary
2661 linker additions, eg;
2662 ./config -DOPENSSL_USE_GMP -lgmp
2665 *) "openssl engine" will not display ENGINE/DSO load failure errors when
2666 testing availability of engines with "-t" - the old behaviour is
2667 produced by increasing the feature's verbosity with "-tt".
2670 *) ECDSA routines: under certain error conditions uninitialized BN objects
2671 could be freed. Solution: make sure initialization is performed early
2672 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
2676 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
2677 and DH_METHOD (eg. by ENGINE implementations) to override the normal
2678 software implementations. For DSA and DH, parameter generation can
2679 also be overriden by providing the appropriate method callbacks.
2682 *) Change the "progress" mechanism used in key-generation and
2683 primality testing to functions that take a new BN_GENCB pointer in
2684 place of callback/argument pairs. The new API functions have "_ex"
2685 postfixes and the older functions are reimplemented as wrappers for
2686 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
2687 declarations of the old functions to help (graceful) attempts to
2688 migrate to the new functions. Also, the new key-generation API
2689 functions operate on a caller-supplied key-structure and return
2690 success/failure rather than returning a key or NULL - this is to
2691 help make "keygen" another member function of RSA_METHOD etc.
2693 Example for using the new callback interface:
2695 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
2699 BN_GENCB_set(&my_cb, my_callback, my_arg);
2701 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
2702 /* For the meaning of a, b in calls to my_callback(), see the
2703 * documentation of the function that calls the callback.
2704 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
2705 * my_callback should return 1 if it wants BN_is_prime_ex()
2706 * to continue, or 0 to stop.
2711 *) Change the ZLIB compression method to be stateful, and make it
2712 available to TLS with the number defined in
2713 draft-ietf-tls-compression-04.txt.
2716 *) Add the ASN.1 structures and functions for CertificatePair, which
2717 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
2719 CertificatePair ::= SEQUENCE {
2720 forward [0] Certificate OPTIONAL,
2721 reverse [1] Certificate OPTIONAL,
2722 -- at least one of the pair shall be present -- }
2724 Also implement the PEM functions to read and write certificate
2725 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
2727 This needed to be defined, mostly for the sake of the LDAP
2728 attribute crossCertificatePair, but may prove useful elsewhere as
2732 *) Make it possible to inhibit symlinking of shared libraries in
2733 Makefile.shared, for Cygwin's sake.
2736 *) Extend the BIGNUM API by creating a function
2737 void BN_set_negative(BIGNUM *a, int neg);
2738 and a macro that behave like
2739 int BN_is_negative(const BIGNUM *a);
2741 to avoid the need to access 'a->neg' directly in applications.
2744 *) Implement fast modular reduction for pseudo-Mersenne primes
2745 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
2746 EC_GROUP_new_curve_GFp() will now automatically use this
2748 [Nils Larsch <nla@trustcenter.de>]
2750 *) Add new lock type (CRYPTO_LOCK_BN).
2753 *) Change the ENGINE framework to automatically load engines
2754 dynamically from specific directories unless they could be
2755 found to already be built in or loaded. Move all the
2756 current engines except for the cryptodev one to a new
2758 The engines in engines/ are built as shared libraries if
2759 the "shared" options was given to ./Configure or ./config.
2760 Otherwise, they are inserted in libcrypto.a.
2761 /usr/local/ssl/engines is the default directory for dynamic
2762 engines, but that can be overriden at configure time through
2763 the usual use of --prefix and/or --openssldir, and at run
2764 time with the environment variable OPENSSL_ENGINES.
2765 [Geoff Thorpe and Richard Levitte]
2767 *) Add Makefile.shared, a helper makefile to build shared
2768 libraries. Addapt Makefile.org.
2771 *) Add version info to Win32 DLLs.
2772 [Peter 'Luna' Runestig" <peter@runestig.com>]
2774 *) Add new 'medium level' PKCS#12 API. Certificates and keys
2775 can be added using this API to created arbitrary PKCS#12
2776 files while avoiding the low level API.
2778 New options to PKCS12_create(), key or cert can be NULL and
2779 will then be omitted from the output file. The encryption
2780 algorithm NIDs can be set to -1 for no encryption, the mac
2781 iteration count can be set to 0 to omit the mac.
2783 Enhance pkcs12 utility by making the -nokeys and -nocerts
2784 options work when creating a PKCS#12 file. New option -nomac
2785 to omit the mac, NONE can be set for an encryption algorithm.
2786 New code is modified to use the enhanced PKCS12_create()
2787 instead of the low level API.
2790 *) Extend ASN1 encoder to support indefinite length constructed
2791 encoding. This can output sequences tags and octet strings in
2792 this form. Modify pk7_asn1.c to support indefinite length
2793 encoding. This is experimental and needs additional code to
2794 be useful, such as an ASN1 bio and some enhanced streaming
2797 Extend template encode functionality so that tagging is passed
2798 down to the template encoder.
2801 *) Let 'openssl req' fail if an argument to '-newkey' is not
2802 recognized instead of using RSA as a default.
2805 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
2806 As these are not official, they are not included in "ALL";
2807 the "ECCdraft" ciphersuite group alias can be used to select them.
2808 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
2810 *) Add ECDH engine support.
2811 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
2813 *) Add ECDH in new directory crypto/ecdh/.
2814 [Douglas Stebila (Sun Microsystems Laboratories)]
2816 *) Let BN_rand_range() abort with an error after 100 iterations
2817 without success (which indicates a broken PRNG).
2820 *) Change BN_mod_sqrt() so that it verifies that the input value
2821 is really the square of the return value. (Previously,
2822 BN_mod_sqrt would show GIGO behaviour.)
2825 *) Add named elliptic curves over binary fields from X9.62, SECG,
2826 and WAP/WTLS; add OIDs that were still missing.
2828 [Sheueling Chang Shantz and Douglas Stebila
2829 (Sun Microsystems Laboratories)]
2831 *) Extend the EC library for elliptic curves over binary fields
2832 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
2835 EC_GF2m_simple_method
2839 EC_GROUP_new_curve_GF2m
2840 EC_GROUP_set_curve_GF2m
2841 EC_GROUP_get_curve_GF2m
2842 EC_POINT_set_affine_coordinates_GF2m
2843 EC_POINT_get_affine_coordinates_GF2m
2844 EC_POINT_set_compressed_coordinates_GF2m
2846 Point compression for binary fields is disabled by default for
2847 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
2850 As binary polynomials are represented as BIGNUMs, various members
2851 of the EC_GROUP and EC_POINT data structures can be shared
2852 between the implementations for prime fields and binary fields;
2853 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
2854 are essentially identical to their ..._GFp counterparts.
2855 (For simplicity, the '..._GFp' prefix has been dropped from
2856 various internal method names.)
2858 An internal 'field_div' method (similar to 'field_mul' and
2859 'field_sqr') has been added; this is used only for binary fields.
2861 [Sheueling Chang Shantz and Douglas Stebila
2862 (Sun Microsystems Laboratories)]
2864 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
2865 through methods ('mul', 'precompute_mult').
2867 The generic implementations (now internally called 'ec_wNAF_mul'
2868 and 'ec_wNAF_precomputed_mult') remain the default if these
2869 methods are undefined.
2871 [Sheueling Chang Shantz and Douglas Stebila
2872 (Sun Microsystems Laboratories)]
2874 *) New function EC_GROUP_get_degree, which is defined through
2875 EC_METHOD. For curves over prime fields, this returns the bit
2876 length of the modulus.
2878 [Sheueling Chang Shantz and Douglas Stebila
2879 (Sun Microsystems Laboratories)]
2881 *) New functions EC_GROUP_dup, EC_POINT_dup.
2882 (These simply call ..._new and ..._copy).
2884 [Sheueling Chang Shantz and Douglas Stebila
2885 (Sun Microsystems Laboratories)]
2887 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
2888 Polynomials are represented as BIGNUMs (where the sign bit is not
2889 used) in the following functions [macros]:
2892 BN_GF2m_sub [= BN_GF2m_add]
2893 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
2894 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
2895 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
2897 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
2898 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
2899 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
2900 BN_GF2m_cmp [= BN_ucmp]
2902 (Note that only the 'mod' functions are actually for fields GF(2^m).
2903 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
2905 For some functions, an the irreducible polynomial defining a
2906 field can be given as an 'unsigned int[]' with strictly
2907 decreasing elements giving the indices of those bits that are set;
2908 i.e., p[] represents the polynomial
2909 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
2911 p[0] > p[1] > ... > p[k] = 0.
2912 This applies to the following functions:
2917 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
2918 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
2920 BN_GF2m_mod_sqrt_arr
2921 BN_GF2m_mod_solve_quad_arr
2925 Conversion can be performed by the following functions:
2930 bntest.c has additional tests for binary polynomial arithmetic.
2932 Two implementations for BN_GF2m_mod_div() are available.
2933 The default algorithm simply uses BN_GF2m_mod_inv() and
2934 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
2935 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
2936 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
2938 [Sheueling Chang Shantz and Douglas Stebila
2939 (Sun Microsystems Laboratories)]
2941 *) Add new error code 'ERR_R_DISABLED' that can be used when some
2942 functionality is disabled at compile-time.
2943 [Douglas Stebila <douglas.stebila@sun.com>]
2945 *) Change default behaviour of 'openssl asn1parse' so that more
2946 information is visible when viewing, e.g., a certificate:
2948 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
2949 mode the content of non-printable OCTET STRINGs is output in a
2950 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
2951 avoid the appearance of a printable string.
2952 [Nils Larsch <nla@trustcenter.de>]
2954 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
2956 EC_GROUP_set_asn1_flag()
2957 EC_GROUP_get_asn1_flag()
2958 EC_GROUP_set_point_conversion_form()
2959 EC_GROUP_get_point_conversion_form()
2960 These control ASN1 encoding details:
2961 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
2962 has been set to OPENSSL_EC_NAMED_CURVE.
2963 - Points are encoded in uncompressed form by default; options for
2964 asn1_for are as for point2oct, namely
2965 POINT_CONVERSION_COMPRESSED
2966 POINT_CONVERSION_UNCOMPRESSED
2967 POINT_CONVERSION_HYBRID
2969 Also add 'seed' and 'seed_len' members to EC_GROUP with access
2972 EC_GROUP_get0_seed()
2973 EC_GROUP_get_seed_len()
2974 This is used only for ASN1 purposes (so far).
2975 [Nils Larsch <nla@trustcenter.de>]
2977 *) Add 'field_type' member to EC_METHOD, which holds the NID
2978 of the appropriate field type OID. The new function
2979 EC_METHOD_get_field_type() returns this value.
2980 [Nils Larsch <nla@trustcenter.de>]
2985 EC_POINT_point2hex()
2986 EC_POINT_hex2point()
2987 providing useful interfaces to EC_POINT_point2oct() and
2988 EC_POINT_oct2point().
2989 [Nils Larsch <nla@trustcenter.de>]
2991 *) Change internals of the EC library so that the functions
2992 EC_GROUP_set_generator()
2993 EC_GROUP_get_generator()
2994 EC_GROUP_get_order()
2995 EC_GROUP_get_cofactor()
2996 are implemented directly in crypto/ec/ec_lib.c and not dispatched
2997 to methods, which would lead to unnecessary code duplication when
2998 adding different types of curves.
2999 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
3001 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
3002 arithmetic, and such that modified wNAFs are generated
3003 (which avoid length expansion in many cases).
3006 *) Add a function EC_GROUP_check_discriminant() (defined via
3007 EC_METHOD) that verifies that the curve discriminant is non-zero.
3009 Add a function EC_GROUP_check() that makes some sanity tests
3010 on a EC_GROUP, its generator and order. This includes
3011 EC_GROUP_check_discriminant().
3012 [Nils Larsch <nla@trustcenter.de>]
3014 *) Add ECDSA in new directory crypto/ecdsa/.
3016 Add applications 'openssl ecparam' and 'openssl ecdsa'
3017 (these are based on 'openssl dsaparam' and 'openssl dsa').
3019 ECDSA support is also included in various other files across the
3020 library. Most notably,
3021 - 'openssl req' now has a '-newkey ecdsa:file' option;
3022 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
3023 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
3024 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
3025 them suitable for ECDSA where domain parameters must be
3026 extracted before the specific public key;
3027 - ECDSA engine support has been added.
3028 [Nils Larsch <nla@trustcenter.de>]
3030 *) Include some named elliptic curves, and add OIDs from X9.62,
3031 SECG, and WAP/WTLS. Each curve can be obtained from the new
3033 EC_GROUP_new_by_curve_name(),
3034 and the list of available named curves can be obtained with
3035 EC_get_builtin_curves().
3036 Also add a 'curve_name' member to EC_GROUP objects, which can be
3038 EC_GROUP_set_curve_name()
3039 EC_GROUP_get_curve_name()
3040 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
3042 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
3043 was actually never needed) and in BN_mul(). The removal in BN_mul()
3044 required a small change in bn_mul_part_recursive() and the addition
3045 of the functions bn_cmp_part_words(), bn_sub_part_words() and
3046 bn_add_part_words(), which do the same thing as bn_cmp_words(),
3047 bn_sub_words() and bn_add_words() except they take arrays with
3051 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
3053 *) Cleanse PEM buffers before freeing them since they may contain
3055 [Benjamin Bennett <ben@psc.edu>]
3057 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3058 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3059 authentication-only ciphersuites.
3062 *) Since AES128 and AES256 share a single mask bit in the logic of
3063 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3064 kludge to work properly if AES128 is available and AES256 isn't.
3067 *) Expand security boundary to match 1.1.1 module.
3070 *) Remove redundant features: hash file source, editing of test vectors
3071 modify fipsld to use external fips_premain.c signature.
3074 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
3075 run algorithm test programs.
3078 *) Make algorithm test programs more tolerant of whitespace.
3081 *) Have SSL/TLS server implementation tolerate "mismatched" record
3082 protocol version while receiving ClientHello even if the
3083 ClientHello is fragmented. (The server can't insist on the
3084 particular protocol version it has chosen before the ServerHello
3085 message has informed the client about his choice.)
3088 *) Load error codes if they are not already present instead of using a
3089 static variable. This allows them to be cleanly unloaded and reloaded.
3092 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
3094 *) Introduce limits to prevent malicious keys being able to
3095 cause a denial of service. (CVE-2006-2940)
3096 [Steve Henson, Bodo Moeller]
3098 *) Fix ASN.1 parsing of certain invalid structures that can result
3099 in a denial of service. (CVE-2006-2937) [Steve Henson]
3101 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3102 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3104 *) Fix SSL client code which could crash if connecting to a
3105 malicious SSLv2 server. (CVE-2006-4343)
3106 [Tavis Ormandy and Will Drewry, Google Security Team]
3108 *) Change ciphersuite string processing so that an explicit
3109 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
3110 will no longer include "AES128-SHA"), and any other similar
3111 ciphersuite (same bitmap) from *other* protocol versions (so that
3112 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
3113 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
3114 changes from 0.9.8b and 0.9.8d.
3117 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
3119 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3120 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3122 *) Change the Unix randomness entropy gathering to use poll() when
3123 possible instead of select(), since the latter has some
3124 undesirable limitations.
3125 [Darryl Miles via Richard Levitte and Bodo Moeller]
3127 *) Disable rogue ciphersuites:
3129 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3130 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3131 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3133 The latter two were purportedly from
3134 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3137 Also deactive the remaining ciphersuites from
3138 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3139 unofficial, and the ID has long expired.
3142 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3143 dual-core machines) and other potential thread-safety issues.
3146 Changes between 0.9.7i and 0.9.7j [04 May 2006]
3148 *) Adapt fipsld and the build system to link against the validated FIPS
3149 module in FIPS mode.
3152 *) Fixes for VC++ 2005 build under Windows.
3155 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
3156 from a Windows bash shell such as MSYS. It is autodetected from the
3157 "config" script when run from a VC++ environment. Modify standard VC++
3158 build to use fipscanister.o from the GNU make build.
3161 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
3163 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
3164 The value now differs depending on if you build for FIPS or not.
3165 BEWARE! A program linked with a shared FIPSed libcrypto can't be
3166 safely run with a non-FIPSed libcrypto, as it may crash because of
3167 the difference induced by this change.
3170 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
3172 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3173 (part of SSL_OP_ALL). This option used to disable the
3174 countermeasure against man-in-the-middle protocol-version
3175 rollback in the SSL 2.0 server implementation, which is a bad
3176 idea. (CVE-2005-2969)
3178 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3179 for Information Security, National Institute of Advanced Industrial
3180 Science and Technology [AIST], Japan)]
3182 *) Minimal support for X9.31 signatures and PSS padding modes. This is
3183 mainly for FIPS compliance and not fully integrated at this stage.
3186 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
3187 the exponentiation using a fixed-length exponent. (Otherwise,
3188 the information leaked through timing could expose the secret key
3189 after many signatures; cf. Bleichenbacher's attack on DSA with
3193 *) Make a new fixed-window mod_exp implementation the default for
3194 RSA, DSA, and DH private-key operations so that the sequence of
3195 squares and multiplies and the memory access pattern are
3196 independent of the particular secret key. This will mitigate
3197 cache-timing and potential related attacks.
3199 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
3200 and this is automatically used by BN_mod_exp_mont() if the new flag
3201 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
3202 will use this BN flag for private exponents unless the flag
3203 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
3204 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
3206 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
3208 *) Change the client implementation for SSLv23_method() and
3209 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
3210 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
3211 (Previously, the SSL 2.0 backwards compatible Client Hello
3212 message format would be used even with SSL_OP_NO_SSLv2.)
3215 *) Add support for smime-type MIME parameter in S/MIME messages which some
3219 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
3220 a threadsafe manner. Modify rsa code to use new function and add calls
3221 to dsa and dh code (which had race conditions before).
3224 *) Include the fixed error library code in the C error file definitions
3225 instead of fixing them up at runtime. This keeps the error code
3226 structures constant.
3229 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
3231 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
3234 *) Fixes for newer kerberos headers. NB: the casts are needed because
3235 the 'length' field is signed on one version and unsigned on another
3236 with no (?) obvious way to tell the difference, without these VC++
3237 complains. Also the "definition" of FAR (blank) is no longer included
3238 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
3239 some needed definitions.
3242 *) Undo Cygwin change.
3245 *) Added support for proxy certificates according to RFC 3820.
3246 Because they may be a security thread to unaware applications,
3247 they must be explicitely allowed in run-time. See
3248 docs/HOWTO/proxy_certificates.txt for further information.
3251 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
3253 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
3254 server and client random values. Previously
3255 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
3256 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
3258 This change has negligible security impact because:
3260 1. Server and client random values still have 24 bytes of pseudo random
3263 2. Server and client random values are sent in the clear in the initial
3266 3. The master secret is derived using the premaster secret (48 bytes in
3267 size for static RSA ciphersuites) as well as client server and random
3270 The OpenSSL team would like to thank the UK NISCC for bringing this issue
3273 [Stephen Henson, reported by UK NISCC]
3275 *) Use Windows randomness collection on Cygwin.
3278 *) Fix hang in EGD/PRNGD query when communication socket is closed
3279 prematurely by EGD/PRNGD.
3280 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
3282 *) Prompt for pass phrases when appropriate for PKCS12 input format.
3285 *) Back-port of selected performance improvements from development
3286 branch, as well as improved support for PowerPC platforms.
3289 *) Add lots of checks for memory allocation failure, error codes to indicate
3290 failure and freeing up memory if a failure occurs.
3291 [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
3293 *) Add new -passin argument to dgst.
3296 *) Perform some character comparisons of different types in X509_NAME_cmp:
3297 this is needed for some certificates that reencode DNs into UTF8Strings
3298 (in violation of RFC3280) and can't or wont issue name rollover
3302 *) Make an explicit check during certificate validation to see that
3303 the CA setting in each certificate on the chain is correct. As a
3304 side effect always do the following basic checks on extensions,
3305 not just when there's an associated purpose to the check:
3307 - if there is an unhandled critical extension (unless the user
3308 has chosen to ignore this fault)
3309 - if the path length has been exceeded (if one is set at all)
3310 - that certain extensions fit the associated purpose (if one has
3314 Changes between 0.9.7d and 0.9.7e [25 Oct 2004]
3316 *) Avoid a race condition when CRLs are checked in a multi threaded
3317 environment. This would happen due to the reordering of the revoked
3318 entries during signature checking and serial number lookup. Now the
3319 encoding is cached and the serial number sort performed under a lock.
3320 Add new STACK function sk_is_sorted().
3323 *) Add Delta CRL to the extension code.
3326 *) Various fixes to s3_pkt.c so alerts are sent properly.
3327 [David Holmes <d.holmes@f5.com>]
3329 *) Reduce the chances of duplicate issuer name and serial numbers (in
3330 violation of RFC3280) using the OpenSSL certificate creation utilities.
3331 This is done by creating a random 64 bit value for the initial serial
3332 number when a serial number file is created or when a self signed
3333 certificate is created using 'openssl req -x509'. The initial serial
3334 number file is created using 'openssl x509 -next_serial' in CA.pl
3335 rather than being initialized to 1.
3338 Changes between 0.9.7c and 0.9.7d [17 Mar 2004]
3340 *) Fix null-pointer assignment in do_change_cipher_spec() revealed
3341 by using the Codenomicon TLS Test Tool (CVE-2004-0079)
3342 [Joe Orton, Steve Henson]
3344 *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
3346 [Joe Orton, Steve Henson]
3348 *) Make it possible to have multiple active certificates with the same
3349 subject in the CA index file. This is done only if the keyword
3350 'unique_subject' is set to 'no' in the main CA section (default
3351 if 'CA_default') of the configuration file. The value is saved
3352 with the database itself in a separate index attribute file,
3353 named like the index file with '.attr' appended to the name.
3356 *) X509 verify fixes. Disable broken certificate workarounds when
3357 X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
3358 keyUsage extension present. Don't accept CRLs with unhandled critical
3359 extensions: since verify currently doesn't process CRL extensions this
3360 rejects a CRL with *any* critical extensions. Add new verify error codes
3364 *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
3365 A clarification of RFC2560 will require the use of OCTET STRINGs and
3366 some implementations cannot handle the current raw format. Since OpenSSL
3367 copies and compares OCSP nonces as opaque blobs without any attempt at
3368 parsing them this should not create any compatibility issues.
3371 *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
3372 calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
3373 this HMAC (and other) operations are several times slower than OpenSSL
3377 *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
3378 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3380 *) Use the correct content when signing type "other".
3383 Changes between 0.9.7b and 0.9.7c [30 Sep 2003]
3385 *) Fix various bugs revealed by running the NISCC test suite:
3387 Stop out of bounds reads in the ASN1 code when presented with
3388 invalid tags (CVE-2003-0543 and CVE-2003-0544).
3390 Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
3392 If verify callback ignores invalid public key errors don't try to check
3393 certificate signature with the NULL public key.
3397 *) New -ignore_err option in ocsp application to stop the server
3398 exiting on the first error in a request.
3401 *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
3402 if the server requested one: as stated in TLS 1.0 and SSL 3.0
3406 *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
3407 extra data after the compression methods not only for TLS 1.0
3408 but also for SSL 3.0 (as required by the specification).
3409 [Bodo Moeller; problem pointed out by Matthias Loepfe]
3411 *) Change X509_certificate_type() to mark the key as exported/exportable
3412 when it's 512 *bits* long, not 512 bytes.
3415 *) Change AES_cbc_encrypt() so it outputs exact multiple of
3416 blocks during encryption.
3419 *) Various fixes to base64 BIO and non blocking I/O. On write
3420 flushes were not handled properly if the BIO retried. On read
3421 data was not being buffered properly and had various logic bugs.
3422 This also affects blocking I/O when the data being decoded is a
3426 *) Various S/MIME bugfixes and compatibility changes:
3427 output correct application/pkcs7 MIME type if
3428 PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
3429 Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
3430 of files as .eml work). Correctly handle very long lines in MIME
3434 Changes between 0.9.7a and 0.9.7b [10 Apr 2003]
3436 *) Countermeasure against the Klima-Pokorny-Rosa extension of
3437 Bleichbacher's attack on PKCS #1 v1.5 padding: treat
3438 a protocol version number mismatch like a decryption error
3439 in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
3442 *) Turn on RSA blinding by default in the default implementation
3443 to avoid a timing attack. Applications that don't want it can call
3444 RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
3445 They would be ill-advised to do so in most cases.
3446 [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
3448 *) Change RSA blinding code so that it works when the PRNG is not
3449 seeded (in this case, the secret RSA exponent is abused as
3450 an unpredictable seed -- if it is not unpredictable, there
3451 is no point in blinding anyway). Make RSA blinding thread-safe
3452 by remembering the creator's thread ID in rsa->blinding and
3453 having all other threads use local one-time blinding factors
3454 (this requires more computation than sharing rsa->blinding, but
3455 avoids excessive locking; and if an RSA object is not shared
3456 between threads, blinding will still be very fast).
3459 *) Fixed a typo bug that would cause ENGINE_set_default() to set an
3460 ENGINE as defaults for all supported algorithms irrespective of
3461 the 'flags' parameter. 'flags' is now honoured, so applications
3462 should make sure they are passing it correctly.
3465 *) Target "mingw" now allows native Windows code to be generated in
3466 the Cygwin environment as well as with the MinGW compiler.
3469 Changes between 0.9.7 and 0.9.7a [19 Feb 2003]
3471 *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
3472 via timing by performing a MAC computation even if incorrrect
3473 block cipher padding has been found. This is a countermeasure
3474 against active attacks where the attacker has to distinguish
3475 between bad padding and a MAC verification error. (CVE-2003-0078)
3477 [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
3478 Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
3479 Martin Vuagnoux (EPFL, Ilion)]
3481 *) Make the no-err option work as intended. The intention with no-err
3482 is not to have the whole error stack handling routines removed from
3483 libcrypto, it's only intended to remove all the function name and
3484 reason texts, thereby removing some of the footprint that may not
3485 be interesting if those errors aren't displayed anyway.
3487 NOTE: it's still possible for any application or module to have it's
3488 own set of error texts inserted. The routines are there, just not
3489 used by default when no-err is given.
3492 *) Add support for FreeBSD on IA64.
3493 [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
3495 *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
3496 Kerberos function mit_des_cbc_cksum(). Before this change,
3497 the value returned by DES_cbc_cksum() was like the one from
3498 mit_des_cbc_cksum(), except the bytes were swapped.
3499 [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
3501 *) Allow an application to disable the automatic SSL chain building.
3502 Before this a rather primitive chain build was always performed in
3503 ssl3_output_cert_chain(): an application had no way to send the
3504 correct chain if the automatic operation produced an incorrect result.
3506 Now the chain builder is disabled if either:
3508 1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
3510 2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
3512 The reasoning behind this is that an application would not want the
3513 auto chain building to take place if extra chain certificates are
3514 present and it might also want a means of sending no additional
3515 certificates (for example the chain has two certificates and the
3519 *) Add the possibility to build without the ENGINE framework.
3520 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3522 *) Under Win32 gmtime() can return NULL: check return value in
3523 OPENSSL_gmtime(). Add error code for case where gmtime() fails.
3526 *) DSA routines: under certain error conditions uninitialized BN objects
3527 could be freed. Solution: make sure initialization is performed early
3528 enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
3529 Nils Larsch <nla@trustcenter.de> via PR#459)
3532 *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
3533 checked on reconnect on the client side, therefore session resumption
3534 could still fail with a "ssl session id is different" error. This
3535 behaviour is masked when SSL_OP_ALL is used due to
3536 SSL_OP_MICROSOFT_SESS_ID_BUG being set.
3537 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3538 followup to PR #377.
3541 *) IA-32 assembler support enhancements: unified ELF targets, support
3542 for SCO/Caldera platforms, fix for Cygwin shared build.
3545 *) Add support for FreeBSD on sparc64. As a consequence, support for
3546 FreeBSD on non-x86 processors is separate from x86 processors on
3547 the config script, much like the NetBSD support.
3548 [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
3550 Changes between 0.9.6h and 0.9.7 [31 Dec 2002]
3552 [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
3555 *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
3556 code (06) was taken as the first octet of the session ID and the last
3557 octet was ignored consequently. As a result SSLv2 client side session
3558 caching could not have worked due to the session ID mismatch between
3560 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3564 *) Change the declaration of needed Kerberos libraries to use EX_LIBS
3565 instead of the special (and badly supported) LIBKRB5. LIBKRB5 is
3569 *) The hw_ncipher.c engine requires dynamic locks. Unfortunately, it
3570 seems that in spite of existing for more than a year, many application
3571 author have done nothing to provide the necessary callbacks, which
3572 means that this particular engine will not work properly anywhere.
3573 This is a very unfortunate situation which forces us, in the name
3574 of usability, to give the hw_ncipher.c a static lock, which is part
3576 NOTE: This is for the 0.9.7 series ONLY. This hack will never
3577 appear in 0.9.8 or later. We EXPECT application authors to have
3578 dealt properly with this when 0.9.8 is released (unless we actually
3579 make such changes in the libcrypto locking code that changes will
3580 have to be made anyway).
3583 *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
3584 octets have been read, EOF or an error occurs. Without this change
3585 some truncated ASN1 structures will not produce an error.
3588 *) Disable Heimdal support, since it hasn't been fully implemented.
3589 Still give the possibility to force the use of Heimdal, but with
3590 warnings and a request that patches get sent to openssl-dev.
3593 *) Add the VC-CE target, introduce the WINCE sysname, and add
3594 INSTALL.WCE and appropriate conditionals to make it build.
3595 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3597 *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
3598 cygssl-x.y.z.dll, where x, y and z are the major, minor and
3599 edit numbers of the version.
3600 [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
3602 *) Introduce safe string copy and catenation functions
3603 (BUF_strlcpy() and BUF_strlcat()).
3604 [Ben Laurie (CHATS) and Richard Levitte]
3606 *) Avoid using fixed-size buffers for one-line DNs.
3607 [Ben Laurie (CHATS)]
3609 *) Add BUF_MEM_grow_clean() to avoid information leakage when
3610 resizing buffers containing secrets, and use where appropriate.
3611 [Ben Laurie (CHATS)]
3613 *) Avoid using fixed size buffers for configuration file location.
3614 [Ben Laurie (CHATS)]
3616 *) Avoid filename truncation for various CA files.
3617 [Ben Laurie (CHATS)]
3619 *) Use sizeof in preference to magic numbers.
3620 [Ben Laurie (CHATS)]
3622 *) Avoid filename truncation in cert requests.
3623 [Ben Laurie (CHATS)]
3625 *) Add assertions to check for (supposedly impossible) buffer
3627 [Ben Laurie (CHATS)]
projects / openssl.git / blob