5 Changes between 1.0.2 and 1.1.0 [xx XXX xxxx]
7 *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used.
8 Access to deprecated functions can be re-enabled by running config with
9 "enable-deprecated". In addition applications wishing to use deprecated
10 functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour
11 will, by default, disable some transitive includes that previously existed
12 in the header files (e.g. ec.h will no longer, by default, include bn.h)
15 *) Added support for OCB mode. OpenSSL has been granted a patent license
16 compatible with the OpenSSL license for use of OCB. Details are available
17 at https://www.openssl.org/docs/misc/OCB-patent-grant-OpenSSL.pdf. Support
18 for OCB can be removed by calling config with no-ocb.
21 *) SSLv2 support has been removed. It still supports receiving a SSLv2
22 compatible client hello.
25 *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz],
26 done while fixing the error code for the key-too-small case.
27 [Annie Yousar <a.yousar@informatik.hu-berlin.de>]
29 *) Remove various unsupported platforms:
35 Sinix/ReliantUNIX RM400
39 *) Experimental support for a new, fast, unbiased prime candidate generator,
40 bn_probable_prime_dh_coprime(). Not currently used by any prime generator.
41 [Felix Laurie von Massenbach <felix@erbridge.co.uk>]
43 *) New output format NSS in the sess_id command line tool. This allows
44 exporting the session id and the master key in NSS keylog format.
45 [Martin Kaiser <martin@kaiser.cx>]
47 *) Harmonize version and its documentation. -f flag is used to display
49 [mancha <mancha1@zoho.com>]
51 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
53 [mancha <mancha1@zoho.com>]
55 *) Fix some double frees. These are not thought to be exploitable.
56 [mancha <mancha1@zoho.com>]
58 *) A missing bounds check in the handling of the TLS heartbeat extension
59 can be used to reveal up to 64k of memory to a connected client or
62 Thanks for Neel Mehta of Google Security for discovering this bug and to
63 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
64 preparing the fix (CVE-2014-0160)
65 [Adam Langley, Bodo Moeller]
67 *) Fix for the attack described in the paper "Recovering OpenSSL
68 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
69 by Yuval Yarom and Naomi Benger. Details can be obtained from:
70 http://eprint.iacr.org/2014/140
72 Thanks to Yuval Yarom and Naomi Benger for discovering this
73 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
74 [Yuval Yarom and Naomi Benger]
76 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
77 this fixes a limitation in previous versions of OpenSSL.
80 *) Experimental encrypt-then-mac support.
82 Experimental support for encrypt then mac from
83 draft-gutmann-tls-encrypt-then-mac-02.txt
85 To enable it set the appropriate extension number (0x42 for the test
86 server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42
88 For non-compliant peers (i.e. just about everything) this should have no
91 WARNING: EXPERIMENTAL, SUBJECT TO CHANGE.
95 *) Add EVP support for key wrapping algorithms, to avoid problems with
96 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
97 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
98 algorithms and include tests cases.
101 *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for
105 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
106 MGF1 digest and OAEP label.
109 *) Make openssl verify return errors.
110 [Chris Palmer <palmer@google.com> and Ben Laurie]
112 *) New function ASN1_TIME_diff to calculate the difference between two
113 ASN1_TIME structures or one structure and the current time.
116 *) Update fips_test_suite to support multiple command line options. New
117 test to induce all self test errors in sequence and check expected
121 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
122 sign or verify all in one operation.
125 *) Add fips_algvs: a multicall fips utility incorporating all the algorithm
126 test programs and fips_test_suite. Includes functionality to parse
127 the minimal script output of fipsalgest.pl directly.
130 *) Add authorisation parameter to FIPS_module_mode_set().
133 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
136 *) Use separate DRBG fields for internal and external flags. New function
137 FIPS_drbg_health_check() to perform on demand health checking. Add
138 generation tests to fips_test_suite with reduced health check interval to
139 demonstrate periodic health checking. Add "nodh" option to
140 fips_test_suite to skip very slow DH test.
143 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
147 *) More extensive health check for DRBG checking many more failure modes.
148 New function FIPS_selftest_drbg_all() to handle every possible DRBG
149 combination: call this in fips_test_suite.
152 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
153 and POST to handle Dual EC cases.
156 *) Add support for canonical generation of DSA parameter 'g'. See
159 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
160 POST to handle HMAC cases.
163 *) Add functions FIPS_module_version() and FIPS_module_version_text()
164 to return numerical and string versions of the FIPS module number.
167 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
168 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented
169 outside the validated module in the FIPS capable OpenSSL.
172 *) Minor change to DRBG entropy callback semantics. In some cases
173 there is no multiple of the block length between min_len and
174 max_len. Allow the callback to return more than max_len bytes
175 of entropy but discard any extra: it is the callback's responsibility
176 to ensure that the extra data discarded does not impact the
177 requested amount of entropy.
180 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
181 information in FIPS186-3, SP800-57 and SP800-131A.
184 *) CCM support via EVP. Interface is very similar to GCM case except we
185 must supply all data in one chunk (i.e. no update, final) and the
186 message length must be supplied if AAD is used. Add algorithm test
190 *) Initial version of POST overhaul. Add POST callback to allow the status
191 of POST to be monitored and/or failures induced. Modify fips_test_suite
192 to use callback. Always run all selftests even if one fails.
195 *) XTS support including algorithm test driver in the fips_gcmtest program.
196 Note: this does increase the maximum key length from 32 to 64 bytes but
197 there should be no binary compatibility issues as existing applications
198 will never use XTS mode.
201 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
202 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
203 performs algorithm blocking for unapproved PRNG types. Also do not
204 set PRNG type in FIPS_mode_set(): leave this to the application.
205 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
206 the standard OpenSSL PRNG: set additional data to a date time vector.
209 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
210 This shouldn't present any incompatibility problems because applications
211 shouldn't be using these directly and any that are will need to rethink
212 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
215 *) Extensive self tests and health checking required by SP800-90 DRBG.
216 Remove strength parameter from FIPS_drbg_instantiate and always
217 instantiate at maximum supported strength.
220 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
223 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
226 *) New function DH_compute_key_padded() to compute a DH key and pad with
227 leading zeroes if needed: this complies with SP800-56A et al.
230 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
231 anything, incomplete, subject to change and largely untested at present.
234 *) Modify fipscanisteronly build option to only build the necessary object
235 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
238 *) Add experimental option FIPSSYMS to give all symbols in
239 fipscanister.o and FIPS or fips prefix. This will avoid
240 conflicts with future versions of OpenSSL. Add perl script
241 util/fipsas.pl to preprocess assembly language source files
242 and rename any affected symbols.
245 *) Add selftest checks and algorithm block of non-fips algorithms in
246 FIPS mode. Remove DES2 from selftests.
249 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
250 return internal method without any ENGINE dependencies. Add new
251 tiny fips sign and verify functions.
254 *) New build option no-ec2m to disable characteristic 2 code.
257 *) New build option "fipscanisteronly". This only builds fipscanister.o
258 and (currently) associated fips utilities. Uses the file Makefile.fips
259 instead of Makefile.org as the prototype.
262 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
263 Update fips_gcmtest to use IV generator.
266 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
267 setting output buffer to NULL. The *Final function must be
268 called although it will not retrieve any additional data. The tag
269 can be set or retrieved with a ctrl. The IV length is by default 12
270 bytes (96 bits) but can be set to an alternative value. If the IV
271 length exceeds the maximum IV length (currently 16 bytes) it cannot be
275 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
276 underlying do_cipher function handles all cipher semantics itself
277 including padding and finalisation. This is useful if (for example)
278 an ENGINE cipher handles block padding itself. The behaviour of
279 do_cipher is subtly changed if this flag is set: the return value
280 is the number of characters written to the output buffer (zero is
281 no longer an error code) or a negative error code. Also if the
282 input buffer is NULL and length 0 finalisation should be performed.
285 *) If a candidate issuer certificate is already part of the constructed
286 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
289 *) Improve forward-security support: add functions
291 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
292 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
294 for use by SSL/TLS servers; the callback function will be called whenever a
295 new session is created, and gets to decide whether the session may be
296 cached to make it resumable (return 0) or not (return 1). (As by the
297 SSL/TLS protocol specifications, the session_id sent by the server will be
298 empty to indicate that the session is not resumable; also, the server will
299 not generate RFC 4507 (RFC 5077) session tickets.)
301 A simple reasonable callback implementation is to return is_forward_secure.
302 This parameter will be set to 1 or 0 depending on the ciphersuite selected
303 by the SSL/TLS server library, indicating whether it can provide forward
305 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
307 *) New -verify_name option in command line utilities to set verification
311 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
312 Add CMAC pkey methods.
315 *) Experimental renegotiation in s_server -www mode. If the client
316 browses /reneg connection is renegotiated. If /renegcert it is
317 renegotiated requesting a certificate.
320 *) Add an "external" session cache for debugging purposes to s_server. This
321 should help trace issues which normally are only apparent in deployed
322 multi-process servers.
325 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
326 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
327 BIO_set_cipher() and some obscure PEM functions were changed so they
328 can now return an error. The RAND changes required a change to the
329 RAND_METHOD structure.
332 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
333 a gcc attribute to warn if the result of a function is ignored. This
334 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
335 whose return value is often ignored.
338 Changes between 1.0.1k and 1.0.2 [xx XXX xxxx]
340 *) Accelerated NIST P-256 elliptic curve implementation for x86_64
341 (other platforms pending).
342 [Shay Gueron & Vlad Krasnov (Intel Corp), Andy Polyakov]
344 *) Add support for the SignedCertificateTimestampList certificate and
345 OCSP response extensions from RFC6962.
348 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
349 for corner cases. (Certain input points at infinity could lead to
350 bogus results, with non-infinity inputs mapped to infinity too.)
353 *) Initial support for PowerISA 2.0.7, first implemented in POWER8.
354 This covers AES, SHA256/512 and GHASH. "Initial" means that most
355 common cases are optimized and there still is room for further
356 improvements. Vector Permutation AES for Altivec is also added.
359 *) Add support for little-endian ppc64 Linux target.
360 [Marcelo Cerri (IBM)]
362 *) Initial support for AMRv8 ISA crypto extensions. This covers AES,
363 SHA1, SHA256 and GHASH. "Initial" means that most common cases
364 are optimized and there still is room for further improvements.
365 Both 32- and 64-bit modes are supported.
366 [Andy Polyakov, Ard Biesheuvel (Linaro)]
368 *) Improved ARMv7 NEON support.
371 *) Support for SPARC Architecture 2011 crypto extensions, first
372 implemented in SPARC T4. This covers AES, DES, Camellia, SHA1,
373 SHA256/512, MD5, GHASH and modular exponentiation.
374 [Andy Polyakov, David Miller]
376 *) Accelerated modular exponentiation for Intel processors, a.k.a.
378 [Shay Gueron & Vlad Krasnov (Intel Corp)]
380 *) Support for new and upcoming Intel processors, including AVX2,
381 BMI and SHA ISA extensions. This includes additional "stitched"
382 implementations, AESNI-SHA256 and GCM, and multi-buffer support
385 This work was sponsored by Intel Corp.
388 *) Support for DTLS 1.2. This adds two sets of DTLS methods: DTLS_*_method()
389 supports both DTLS 1.2 and 1.0 and should use whatever version the peer
390 supports and DTLSv1_2_*_method() which supports DTLS 1.2 only.
393 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
394 this fixes a limiation in previous versions of OpenSSL.
397 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
398 MGF1 digest and OAEP label.
401 *) Add EVP support for key wrapping algorithms, to avoid problems with
402 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
403 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
404 algorithms and include tests cases.
407 *) Add functions to allocate and set the fields of an ECDSA_METHOD
409 [Douglas E. Engert, Steve Henson]
411 *) New functions OPENSSL_gmtime_diff and ASN1_TIME_diff to find the
412 difference in days and seconds between two tm or ASN1_TIME structures.
415 *) Add -rev test option to s_server to just reverse order of characters
416 received by client and send back to server. Also prints an abbreviated
417 summary of the connection parameters.
420 *) New option -brief for s_client and s_server to print out a brief summary
421 of connection parameters.
424 *) Add callbacks for arbitrary TLS extensions.
425 [Trevor Perrin <trevp@trevp.net> and Ben Laurie]
427 *) New option -crl_download in several openssl utilities to download CRLs
428 from CRLDP extension in certificates.
431 *) New options -CRL and -CRLform for s_client and s_server for CRLs.
434 *) New function X509_CRL_diff to generate a delta CRL from the difference
435 of two full CRLs. Add support to "crl" utility.
438 *) New functions to set lookup_crls function and to retrieve
439 X509_STORE from X509_STORE_CTX.
442 *) Print out deprecated issuer and subject unique ID fields in
446 *) Extend OCSP I/O functions so they can be used for simple general purpose
447 HTTP as well as OCSP. New wrapper function which can be used to download
448 CRLs using the OCSP API.
451 *) Delegate command line handling in s_client/s_server to SSL_CONF APIs.
454 *) SSL_CONF* functions. These provide a common framework for application
455 configuration using configuration files or command lines.
458 *) SSL/TLS tracing code. This parses out SSL/TLS records using the
459 message callback and prints the results. Needs compile time option
460 "enable-ssl-trace". New options to s_client and s_server to enable
464 *) New ctrl and macro to retrieve supported points extensions.
465 Print out extension in s_server and s_client.
468 *) New functions to retrieve certificate signature and signature
472 *) Add functions to retrieve and manipulate the raw cipherlist sent by a
476 *) New Suite B modes for TLS code. These use and enforce the requirements
477 of RFC6460: restrict ciphersuites, only permit Suite B algorithms and
478 only use Suite B curves. The Suite B modes can be set by using the
479 strings "SUITEB128", "SUITEB192" or "SUITEB128ONLY" for the cipherstring.
482 *) New chain verification flags for Suite B levels of security. Check
483 algorithms are acceptable when flags are set in X509_verify_cert.
486 *) Make tls1_check_chain return a set of flags indicating checks passed
487 by a certificate chain. Add additional tests to handle client
488 certificates: checks for matching certificate type and issuer name
492 *) If an attempt is made to use a signature algorithm not in the peer
493 preference list abort the handshake. If client has no suitable
494 signature algorithms in response to a certificate request do not
498 *) If server EC tmp key is not in client preference list abort handshake.
501 *) Add support for certificate stores in CERT structure. This makes it
502 possible to have different stores per SSL structure or one store in
503 the parent SSL_CTX. Include distint stores for certificate chain
504 verification and chain building. New ctrl SSL_CTRL_BUILD_CERT_CHAIN
505 to build and store a certificate chain in CERT structure: returing
506 an error if the chain cannot be built: this will allow applications
507 to test if a chain is correctly configured.
509 Note: if the CERT based stores are not set then the parent SSL_CTX
510 store is used to retain compatibility with existing behaviour.
514 *) New function ssl_set_client_disabled to set a ciphersuite disabled
515 mask based on the current session, check mask when sending client
516 hello and checking the requested ciphersuite.
519 *) New ctrls to retrieve and set certificate types in a certificate
520 request message. Print out received values in s_client. If certificate
521 types is not set with custom values set sensible values based on
522 supported signature algorithms.
525 *) Support for distinct client and server supported signature algorithms.
528 *) Add certificate callback. If set this is called whenever a certificate
529 is required by client or server. An application can decide which
530 certificate chain to present based on arbitrary criteria: for example
531 supported signature algorithms. Add very simple example to s_server.
532 This fixes many of the problems and restrictions of the existing client
533 certificate callback: for example you can now clear an existing
534 certificate and specify the whole chain.
537 *) Add new "valid_flags" field to CERT_PKEY structure which determines what
538 the certificate can be used for (if anything). Set valid_flags field
539 in new tls1_check_chain function. Simplify ssl_set_cert_masks which used
540 to have similar checks in it.
542 Add new "cert_flags" field to CERT structure and include a "strict mode".
543 This enforces some TLS certificate requirements (such as only permitting
544 certificate signature algorithms contained in the supported algorithms
545 extension) which some implementations ignore: this option should be used
546 with caution as it could cause interoperability issues.
549 *) Update and tidy signature algorithm extension processing. Work out
550 shared signature algorithms based on preferences and peer algorithms
551 and print them out in s_client and s_server. Abort handshake if no
552 shared signature algorithms.
555 *) Add new functions to allow customised supported signature algorithms
556 for SSL and SSL_CTX structures. Add options to s_client and s_server
560 *) New function SSL_certs_clear() to delete all references to certificates
561 from an SSL structure. Before this once a certificate had been added
562 it couldn't be removed.
565 *) Integrate hostname, email address and IP address checking with certificate
566 verification. New verify options supporting checking in opensl utility.
569 *) Fixes and wildcard matching support to hostname and email checking
570 functions. Add manual page.
571 [Florian Weimer (Red Hat Product Security Team)]
573 *) New functions to check a hostname email or IP address against a
574 certificate. Add options x509 utility to print results of checks against
578 *) Fix OCSP checking.
579 [Rob Stradling <rob.stradling@comodo.com> and Ben Laurie]
581 *) Initial experimental support for explicitly trusted non-root CAs.
582 OpenSSL still tries to build a complete chain to a root but if an
583 intermediate CA has a trust setting included that is used. The first
584 setting is used: whether to trust (e.g., -addtrust option to the x509
588 *) Add -trusted_first option which attempts to find certificates in the
589 trusted store even if an untrusted chain is also supplied.
592 *) MIPS assembly pack updates: support for MIPS32r2 and SmartMIPS ASE,
593 platform support for Linux and Android.
596 *) Support for linux-x32, ILP32 environment in x86_64 framework.
599 *) Experimental multi-implementation support for FIPS capable OpenSSL.
600 When in FIPS mode the approved implementations are used as normal,
601 when not in FIPS mode the internal unapproved versions are used instead.
602 This means that the FIPS capable OpenSSL isn't forced to use the
603 (often lower performance) FIPS implementations outside FIPS mode.
606 *) Transparently support X9.42 DH parameters when calling
607 PEM_read_bio_DHparameters. This means existing applications can handle
608 the new parameter format automatically.
611 *) Initial experimental support for X9.42 DH parameter format: mainly
612 to support use of 'q' parameter for RFC5114 parameters.
615 *) Add DH parameters from RFC5114 including test data to dhtest.
618 *) Support for automatic EC temporary key parameter selection. If enabled
619 the most preferred EC parameters are automatically used instead of
620 hardcoded fixed parameters. Now a server just has to call:
621 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
622 support ECDH and use the most appropriate parameters.
625 *) Enhance and tidy EC curve and point format TLS extension code. Use
626 static structures instead of allocation if default values are used.
627 New ctrls to set curves we wish to support and to retrieve shared curves.
628 Print out shared curves in s_server. New options to s_server and s_client
629 to set list of supported curves.
632 *) New ctrls to retrieve supported signature algorithms and
633 supported curve values as an array of NIDs. Extend openssl utility
634 to print out received values.
637 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
638 between NIDs and the more common NIST names such as "P-256". Enhance
639 ecparam utility and ECC method to recognise the NIST names for curves.
642 *) Enhance SSL/TLS certificate chain handling to support different
643 chains for each certificate instead of one chain in the parent SSL_CTX.
646 *) Support for fixed DH ciphersuite client authentication: where both
647 server and client use DH certificates with common parameters.
650 *) Support for fixed DH ciphersuites: those requiring DH server
654 *) New function i2d_re_X509_tbs for re-encoding the TBS portion of
656 Note: Related 1.0.2-beta specific macros X509_get_cert_info,
657 X509_CINF_set_modified, X509_CINF_get_issuer, X509_CINF_get_extensions and
658 X509_CINF_get_signature were reverted post internal team review.
660 Changes between 1.0.1j and 1.0.1k [xx XXX xxxx]
662 *) Do not resume sessions on the server if the negotiated protocol
663 version does not match the session's version. Resuming with a different
664 version, while not strictly forbidden by the RFC, is of questionable
665 sanity and breaks all known clients.
666 [David Benjamin, Emilia Käsper]
668 *) Tighten handling of the ChangeCipherSpec (CCS) message: reject
669 early CCS messages during renegotiation. (Note that because
670 renegotiation is encrypted, this early CCS was not exploitable.)
673 *) Tighten client-side session ticket handling during renegotiation:
674 ensure that the client only accepts a session ticket if the server sends
675 the extension anew in the ServerHello. Previously, a TLS client would
676 reuse the old extension state and thus accept a session ticket if one was
677 announced in the initial ServerHello.
679 Similarly, ensure that the client requires a session ticket if one
680 was advertised in the ServerHello. Previously, a TLS client would
681 ignore a missing NewSessionTicket message.
684 Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
688 A flaw in the DTLS SRTP extension parsing code allows an attacker, who
689 sends a carefully crafted handshake message, to cause OpenSSL to fail
690 to free up to 64k of memory causing a memory leak. This could be
691 exploited in a Denial Of Service attack. This issue affects OpenSSL
692 1.0.1 server implementations for both SSL/TLS and DTLS regardless of
693 whether SRTP is used or configured. Implementations of OpenSSL that
694 have been compiled with OPENSSL_NO_SRTP defined are not affected.
696 The fix was developed by the OpenSSL team.
700 *) Session Ticket Memory Leak.
702 When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
703 integrity of that ticket is first verified. In the event of a session
704 ticket integrity check failing, OpenSSL will fail to free memory
705 causing a memory leak. By sending a large number of invalid session
706 tickets an attacker could exploit this issue in a Denial Of Service
711 *) Build option no-ssl3 is incomplete.
713 When OpenSSL is configured with "no-ssl3" as a build option, servers
714 could accept and complete a SSL 3.0 handshake, and clients could be
715 configured to send them.
717 [Akamai and the OpenSSL team]
719 *) Add support for TLS_FALLBACK_SCSV.
720 Client applications doing fallback retries should call
721 SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
723 [Adam Langley, Bodo Moeller]
725 *) Add additional DigestInfo checks.
727 Reencode DigestInto in DER and check against the original when
728 verifying RSA signature: this will reject any improperly encoded
729 DigestInfo structures.
731 Note: this is a precautionary measure and no attacks are currently known.
735 Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
737 *) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
738 SRP code can be overrun an internal buffer. Add sanity check that
739 g, A, B < N to SRP code.
741 Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
742 Group for discovering this issue.
746 *) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
747 TLS 1.0 instead of higher protocol versions when the ClientHello message
748 is badly fragmented. This allows a man-in-the-middle attacker to force a
749 downgrade to TLS 1.0 even if both the server and the client support a
750 higher protocol version, by modifying the client's TLS records.
752 Thanks to David Benjamin and Adam Langley (Google) for discovering and
753 researching this issue.
757 *) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
758 to a denial of service attack. A malicious server can crash the client
759 with a null pointer dereference (read) by specifying an anonymous (EC)DH
760 ciphersuite and sending carefully crafted handshake messages.
762 Thanks to Felix Gröbert (Google) for discovering and researching this
767 *) By sending carefully crafted DTLS packets an attacker could cause openssl
768 to leak memory. This can be exploited through a Denial of Service attack.
769 Thanks to Adam Langley for discovering and researching this issue.
773 *) An attacker can force openssl to consume large amounts of memory whilst
774 processing DTLS handshake messages. This can be exploited through a
775 Denial of Service attack.
776 Thanks to Adam Langley for discovering and researching this issue.
780 *) An attacker can force an error condition which causes openssl to crash
781 whilst processing DTLS packets due to memory being freed twice. This
782 can be exploited through a Denial of Service attack.
783 Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
788 *) If a multithreaded client connects to a malicious server using a resumed
789 session and the server sends an ec point format extension it could write
790 up to 255 bytes to freed memory.
792 Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
797 *) A malicious server can crash an OpenSSL client with a null pointer
798 dereference (read) by specifying an SRP ciphersuite even though it was not
799 properly negotiated with the client. This can be exploited through a
800 Denial of Service attack.
802 Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
803 discovering and researching this issue.
807 *) A flaw in OBJ_obj2txt may cause pretty printing functions such as
808 X509_name_oneline, X509_name_print_ex et al. to leak some information
809 from the stack. Applications may be affected if they echo pretty printing
810 output to the attacker.
812 Thanks to Ivan Fratric (Google) for discovering this issue.
814 [Emilia Käsper, and Steve Henson]
816 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
817 for corner cases. (Certain input points at infinity could lead to
818 bogus results, with non-infinity inputs mapped to infinity too.)
821 Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
823 *) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
824 handshake can force the use of weak keying material in OpenSSL
825 SSL/TLS clients and servers.
827 Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
828 researching this issue. (CVE-2014-0224)
829 [KIKUCHI Masashi, Steve Henson]
831 *) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
832 OpenSSL DTLS client the code can be made to recurse eventually crashing
835 Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
837 [Imre Rad, Steve Henson]
839 *) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
840 be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
841 client or server. This is potentially exploitable to run arbitrary
842 code on a vulnerable client or server.
844 Thanks to Jüri Aedla for reporting this issue. (CVE-2014-0195)
845 [Jüri Aedla, Steve Henson]
847 *) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
848 are subject to a denial of service attack.
850 Thanks to Felix Gröbert and Ivan Fratric at Google for discovering
851 this issue. (CVE-2014-3470)
852 [Felix Gröbert, Ivan Fratric, Steve Henson]
854 *) Harmonize version and its documentation. -f flag is used to display
856 [mancha <mancha1@zoho.com>]
858 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
860 [mancha <mancha1@zoho.com>]
862 *) Fix some double frees. These are not thought to be exploitable.
863 [mancha <mancha1@zoho.com>]
865 Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
867 *) A missing bounds check in the handling of the TLS heartbeat extension
868 can be used to reveal up to 64k of memory to a connected client or
871 Thanks for Neel Mehta of Google Security for discovering this bug and to
872 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
873 preparing the fix (CVE-2014-0160)
874 [Adam Langley, Bodo Moeller]
876 *) Fix for the attack described in the paper "Recovering OpenSSL
877 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
878 by Yuval Yarom and Naomi Benger. Details can be obtained from:
879 http://eprint.iacr.org/2014/140
881 Thanks to Yuval Yarom and Naomi Benger for discovering this
882 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
883 [Yuval Yarom and Naomi Benger]
885 *) TLS pad extension: draft-agl-tls-padding-03
887 Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
888 TLS client Hello record length value would otherwise be > 255 and
889 less that 512 pad with a dummy extension containing zeroes so it
890 is at least 512 bytes long.
892 [Adam Langley, Steve Henson]
894 Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
896 *) Fix for TLS record tampering bug. A carefully crafted invalid
897 handshake could crash OpenSSL with a NULL pointer exception.
898 Thanks to Anton Johansson for reporting this issues.
901 *) Keep original DTLS digest and encryption contexts in retransmission
902 structures so we can use the previous session parameters if they need
903 to be resent. (CVE-2013-6450)
906 *) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
907 avoids preferring ECDHE-ECDSA ciphers when the client appears to be
908 Safari on OS X. Safari on OS X 10.8..10.8.3 advertises support for
909 several ECDHE-ECDSA ciphers, but fails to negotiate them. The bug
910 is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
911 10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
912 [Rob Stradling, Adam Langley]
914 Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
916 *) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
917 supporting platforms or when small records were transferred.
918 [Andy Polyakov, Steve Henson]
920 Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
922 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
924 This addresses the flaw in CBC record processing discovered by
925 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
926 at: http://www.isg.rhul.ac.uk/tls/
928 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
929 Security Group at Royal Holloway, University of London
930 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
931 Emilia Käsper for the initial patch.
933 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
935 *) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
936 ciphersuites which can be exploited in a denial of service attack.
937 Thanks go to and to Adam Langley <agl@chromium.org> for discovering
938 and detecting this bug and to Wolfgang Ettlinger
939 <wolfgang.ettlinger@gmail.com> for independently discovering this issue.
943 *) Return an error when checking OCSP signatures when key is NULL.
944 This fixes a DoS attack. (CVE-2013-0166)
947 *) Make openssl verify return errors.
948 [Chris Palmer <palmer@google.com> and Ben Laurie]
950 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
951 the right response is stapled. Also change SSL_get_certificate()
952 so it returns the certificate actually sent.
953 See http://rt.openssl.org/Ticket/Display.html?id=2836.
954 [Rob Stradling <rob.stradling@comodo.com>]
956 *) Fix possible deadlock when decoding public keys.
959 *) Don't use TLS 1.0 record version number in initial client hello
963 Changes between 1.0.1b and 1.0.1c [10 May 2012]
965 *) Sanity check record length before skipping explicit IV in TLS
966 1.2, 1.1 and DTLS to fix DoS attack.
968 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
969 fuzzing as a service testing platform.
973 *) Initialise tkeylen properly when encrypting CMS messages.
974 Thanks to Solar Designer of Openwall for reporting this issue.
977 *) In FIPS mode don't try to use composite ciphers as they are not
981 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
983 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
984 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
985 mean any application compiled against OpenSSL 1.0.0 headers setting
986 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
987 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
988 0x10000000L Any application which was previously compiled against
989 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
990 will need to be recompiled as a result. Letting be results in
991 inability to disable specifically TLS 1.1 and in client context,
992 in unlike event, limit maximum offered version to TLS 1.0 [see below].
995 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
996 disable just protocol X, but all protocols above X *if* there are
997 protocols *below* X still enabled. In more practical terms it means
998 that if application wants to disable TLS1.0 in favor of TLS1.1 and
999 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
1000 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
1004 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
1006 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
1007 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
1008 in CRYPTO_realloc_clean.
1010 Thanks to Tavis Ormandy, Google Security Team, for discovering this
1011 issue and to Adam Langley <agl@chromium.org> for fixing it.
1013 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
1015 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
1018 *) Workarounds for some broken servers that "hang" if a client hello
1019 record length exceeds 255 bytes.
1021 1. Do not use record version number > TLS 1.0 in initial client
1022 hello: some (but not all) hanging servers will now work.
1023 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
1024 the number of ciphers sent in the client hello. This should be
1025 set to an even number, such as 50, for example by passing:
1026 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
1027 Most broken servers should now work.
1028 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
1029 TLS 1.2 client support entirely.
1032 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
1035 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
1037 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
1038 STRING form instead of a DigestInfo.
1041 *) The format used for MDC2 RSA signatures is inconsistent between EVP
1042 and the RSA_sign/RSA_verify functions. This was made more apparent when
1043 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
1044 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
1045 the correct format in RSA_verify so both forms transparently work.
1048 *) Some servers which support TLS 1.0 can choke if we initially indicate
1049 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
1050 encrypted premaster secret. As a workaround use the maximum permitted
1051 client version in client hello, this should keep such servers happy
1052 and still work with previous versions of OpenSSL.
1055 *) Add support for TLS/DTLS heartbeats.
1056 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1058 *) Add support for SCTP.
1059 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1061 *) Improved PRNG seeding for VOS.
1062 [Paul Green <Paul.Green@stratus.com>]
1064 *) Extensive assembler packs updates, most notably:
1066 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
1067 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
1068 - x86_64: bit-sliced AES implementation;
1069 - ARM: NEON support, contemporary platforms optimizations;
1070 - s390x: z196 support;
1071 - *: GHASH and GF(2^m) multiplication implementations;
1075 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
1076 (removal of unnecessary code)
1077 [Peter Sylvester <peter.sylvester@edelweb.fr>]
1079 *) Add TLS key material exporter from RFC 5705.
1082 *) Add DTLS-SRTP negotiation from RFC 5764.
1085 *) Add Next Protocol Negotiation,
1086 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
1087 disabled with a no-npn flag to config or Configure. Code donated
1089 [Adam Langley <agl@google.com> and Ben Laurie]
1091 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
1092 NIST-P256, NIST-P521, with constant-time single point multiplication on
1093 typical inputs. Compiler support for the nonstandard type __uint128_t is
1094 required to use this (present in gcc 4.4 and later, for 64-bit builds).
1095 Code made available under Apache License version 2.0.
1097 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
1098 line to include this in your build of OpenSSL, and run "make depend" (or
1099 "make update"). This enables the following EC_METHODs:
1101 EC_GFp_nistp224_method()
1102 EC_GFp_nistp256_method()
1103 EC_GFp_nistp521_method()
1105 EC_GROUP_new_by_curve_name() will automatically use these (while
1106 EC_GROUP_new_curve_GFp() currently prefers the more flexible
1108 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
1110 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
1111 all platforms. Move ssize_t definition from e_os.h to the public
1112 header file e_os2.h as it now appears in public header file cms.h
1115 *) New -sigopt option to the ca, req and x509 utilities. Additional
1116 signature parameters can be passed using this option and in
1120 *) Add RSA PSS signing function. This will generate and set the
1121 appropriate AlgorithmIdentifiers for PSS based on those in the
1122 corresponding EVP_MD_CTX structure. No application support yet.
1125 *) Support for companion algorithm specific ASN1 signing routines.
1126 New function ASN1_item_sign_ctx() signs a pre-initialised
1127 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
1128 the appropriate parameters.
1131 *) Add new algorithm specific ASN1 verification initialisation function
1132 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
1133 handling will be the same no matter what EVP_PKEY_METHOD is used.
1134 Add a PSS handler to support verification of PSS signatures: checked
1135 against a number of sample certificates.
1138 *) Add signature printing for PSS. Add PSS OIDs.
1139 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
1141 *) Add algorithm specific signature printing. An individual ASN1 method
1142 can now print out signatures instead of the standard hex dump.
1144 More complex signatures (e.g. PSS) can print out more meaningful
1145 information. Include DSA version that prints out the signature
1149 *) Password based recipient info support for CMS library: implementing
1153 *) Split password based encryption into PBES2 and PBKDF2 functions. This
1154 neatly separates the code into cipher and PBE sections and is required
1155 for some algorithms that split PBES2 into separate pieces (such as
1156 password based CMS).
1159 *) Session-handling fixes:
1160 - Fix handling of connections that are resuming with a session ID,
1161 but also support Session Tickets.
1162 - Fix a bug that suppressed issuing of a new ticket if the client
1163 presented a ticket with an expired session.
1164 - Try to set the ticket lifetime hint to something reasonable.
1165 - Make tickets shorter by excluding irrelevant information.
1166 - On the client side, don't ignore renewed tickets.
1167 [Adam Langley, Bodo Moeller (Google)]
1169 *) Fix PSK session representation.
1172 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
1174 This work was sponsored by Intel.
1177 *) Add GCM support to TLS library. Some custom code is needed to split
1178 the IV between the fixed (from PRF) and explicit (from TLS record)
1179 portions. This adds all GCM ciphersuites supported by RFC5288 and
1180 RFC5289. Generalise some AES* cipherstrings to include GCM and
1181 add a special AESGCM string for GCM only.
1184 *) Expand range of ctrls for AES GCM. Permit setting invocation
1185 field on decrypt and retrieval of invocation field only on encrypt.
1188 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
1189 As required by RFC5289 these ciphersuites cannot be used if for
1190 versions of TLS earlier than 1.2.
1193 *) For FIPS capable OpenSSL interpret a NULL default public key method
1194 as unset and return the appropriate default but do *not* set the default.
1195 This means we can return the appropriate method in applications that
1196 switch between FIPS and non-FIPS modes.
1199 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
1200 ENGINE is used then we cannot handle that in the FIPS module so we
1201 keep original code iff non-FIPS operations are allowed.
1204 *) Add -attime option to openssl utilities.
1205 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
1207 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
1210 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
1211 FIPS EC methods unconditionally for now.
1214 *) New build option no-ec2m to disable characteristic 2 code.
1217 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
1218 all cases can be covered as some introduce binary incompatibilities.
1221 *) Redirect RSA operations to FIPS module including keygen,
1222 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
1225 *) Add similar low level API blocking to ciphers.
1228 *) Low level digest APIs are not approved in FIPS mode: any attempt
1229 to use these will cause a fatal error. Applications that *really* want
1230 to use them can use the private_* version instead.
1233 *) Redirect cipher operations to FIPS module for FIPS builds.
1236 *) Redirect digest operations to FIPS module for FIPS builds.
1239 *) Update build system to add "fips" flag which will link in fipscanister.o
1240 for static and shared library builds embedding a signature if needed.
1243 *) Output TLS supported curves in preference order instead of numerical
1244 order. This is currently hardcoded for the highest order curves first.
1245 This should be configurable so applications can judge speed vs strength.
1248 *) Add TLS v1.2 server support for client authentication.
1251 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
1255 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
1256 FIPS modules versions.
1259 *) Add TLS v1.2 client side support for client authentication. Keep cache
1260 of handshake records longer as we don't know the hash algorithm to use
1261 until after the certificate request message is received.
1264 *) Initial TLS v1.2 client support. Add a default signature algorithms
1265 extension including all the algorithms we support. Parse new signature
1266 format in client key exchange. Relax some ECC signing restrictions for
1267 TLS v1.2 as indicated in RFC5246.
1270 *) Add server support for TLS v1.2 signature algorithms extension. Switch
1271 to new signature format when needed using client digest preference.
1272 All server ciphersuites should now work correctly in TLS v1.2. No client
1273 support yet and no support for client certificates.
1276 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
1277 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
1278 ciphersuites. At present only RSA key exchange ciphersuites work with
1279 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
1280 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
1281 and version checking.
1284 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
1285 with this defined it will not be affected by any changes to ssl internal
1286 structures. Add several utility functions to allow openssl application
1287 to work with OPENSSL_NO_SSL_INTERN defined.
1291 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
1293 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
1296 *) Permit abbreviated handshakes when renegotiating using the function
1297 SSL_renegotiate_abbreviated().
1298 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1300 *) Add call to ENGINE_register_all_complete() to
1301 ENGINE_load_builtin_engines(), so some implementations get used
1302 automatically instead of needing explicit application support.
1305 *) Add support for TLS key exporter as described in RFC5705.
1306 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
1308 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
1309 a few changes are required:
1311 Add SSL_OP_NO_TLSv1_1 flag.
1312 Add TLSv1_1 methods.
1313 Update version checking logic to handle version 1.1.
1314 Add explicit IV handling (ported from DTLS code).
1315 Add command line options to s_client/s_server.
1318 Changes between 1.0.0j and 1.0.0k [5 Feb 2013]
1320 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
1322 This addresses the flaw in CBC record processing discovered by
1323 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
1324 at: http://www.isg.rhul.ac.uk/tls/
1326 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1327 Security Group at Royal Holloway, University of London
1328 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
1329 Emilia Käsper for the initial patch.
1331 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
1333 *) Return an error when checking OCSP signatures when key is NULL.
1334 This fixes a DoS attack. (CVE-2013-0166)
1337 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
1338 the right response is stapled. Also change SSL_get_certificate()
1339 so it returns the certificate actually sent.
1340 See http://rt.openssl.org/Ticket/Display.html?id=2836.
1341 (This is a backport)
1342 [Rob Stradling <rob.stradling@comodo.com>]
1344 *) Fix possible deadlock when decoding public keys.
1347 Changes between 1.0.0i and 1.0.0j [10 May 2012]
1349 [NB: OpenSSL 1.0.0i and later 1.0.0 patch levels were released after
1352 *) Sanity check record length before skipping explicit IV in DTLS
1355 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
1356 fuzzing as a service testing platform.
1360 *) Initialise tkeylen properly when encrypting CMS messages.
1361 Thanks to Solar Designer of Openwall for reporting this issue.
1364 Changes between 1.0.0h and 1.0.0i [19 Apr 2012]
1366 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
1367 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
1368 in CRYPTO_realloc_clean.
1370 Thanks to Tavis Ormandy, Google Security Team, for discovering this
1371 issue and to Adam Langley <agl@chromium.org> for fixing it.
1373 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
1375 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
1377 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
1378 in CMS and PKCS7 code. When RSA decryption fails use a random key for
1379 content decryption and always return the same error. Note: this attack
1380 needs on average 2^20 messages so it only affects automated senders. The
1381 old behaviour can be reenabled in the CMS code by setting the
1382 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
1383 an MMA defence is not necessary.
1384 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
1385 this issue. (CVE-2012-0884)
1388 *) Fix CVE-2011-4619: make sure we really are receiving a
1389 client hello before rejecting multiple SGC restarts. Thanks to
1390 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
1393 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
1395 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1396 Thanks to Antonio Martin, Enterprise Secure Access Research and
1397 Development, Cisco Systems, Inc. for discovering this bug and
1398 preparing a fix. (CVE-2012-0050)
1401 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
1403 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1404 of the Vaudenay padding oracle attack on CBC mode encryption
1405 which enables an efficient plaintext recovery attack against
1406 the OpenSSL implementation of DTLS. Their attack exploits timing
1407 differences arising during decryption processing. A research
1408 paper describing this attack can be found at:
1409 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1410 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1411 Security Group at Royal Holloway, University of London
1412 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1413 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1414 for preparing the fix. (CVE-2011-4108)
1415 [Robin Seggelmann, Michael Tuexen]
1417 *) Clear bytes used for block padding of SSL 3.0 records.
1419 [Adam Langley (Google)]
1421 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1422 Kadianakis <desnacked@gmail.com> for discovering this issue and
1423 Adam Langley for preparing the fix. (CVE-2011-4619)
1424 [Adam Langley (Google)]
1426 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
1427 [Andrey Kulikov <amdeich@gmail.com>]
1429 *) Prevent malformed RFC3779 data triggering an assertion failure.
1430 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1431 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1432 [Rob Austein <sra@hactrn.net>]
1434 *) Improved PRNG seeding for VOS.
1435 [Paul Green <Paul.Green@stratus.com>]
1437 *) Fix ssl_ciph.c set-up race.
1438 [Adam Langley (Google)]
1440 *) Fix spurious failures in ecdsatest.c.
1441 [Emilia Käsper (Google)]
1443 *) Fix the BIO_f_buffer() implementation (which was mixing different
1444 interpretations of the '..._len' fields).
1445 [Adam Langley (Google)]
1447 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1448 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1449 threads won't reuse the same blinding coefficients.
1451 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1452 lock to call BN_BLINDING_invert_ex, and avoids one use of
1453 BN_BLINDING_update for each BN_BLINDING structure (previously,
1454 the last update always remained unused).
1455 [Emilia Käsper (Google)]
1457 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
1458 [Bob Buckholz (Google)]
1460 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
1462 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
1463 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
1464 [Kaspar Brand <ossl@velox.ch>]
1466 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1467 for multi-threaded use of ECDH. (CVE-2011-3210)
1468 [Adam Langley (Google)]
1470 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1473 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
1474 signature public key algorithm by using OID xref utilities instead.
1475 Before this you could only use some ECC ciphersuites with SHA1 only.
1478 *) Add protection against ECDSA timing attacks as mentioned in the paper
1479 by Billy Bob Brumley and Nicola Tuveri, see:
1481 http://eprint.iacr.org/2011/232.pdf
1483 [Billy Bob Brumley and Nicola Tuveri]
1485 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
1487 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1488 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1490 *) Fix bug in string printing code: if *any* escaping is enabled we must
1491 escape the escape character (backslash) or the resulting string is
1495 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
1497 *) Disable code workaround for ancient and obsolete Netscape browsers
1498 and servers: an attacker can use it in a ciphersuite downgrade attack.
1499 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1502 *) Fixed J-PAKE implementation error, originally discovered by
1503 Sebastien Martini, further info and confirmation from Stefan
1504 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1507 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
1509 *) Fix extension code to avoid race conditions which can result in a buffer
1510 overrun vulnerability: resumed sessions must not be modified as they can
1511 be shared by multiple threads. CVE-2010-3864
1514 *) Fix WIN32 build system to correctly link an ENGINE directory into
1518 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
1520 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
1522 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
1524 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
1526 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
1527 context. The operation can be customised via the ctrl mechanism in
1528 case ENGINEs want to include additional functionality.
1531 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
1534 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
1535 output hashes compatible with older versions of OpenSSL.
1536 [Willy Weisz <weisz@vcpc.univie.ac.at>]
1538 *) Fix compression algorithm handling: if resuming a session use the
1539 compression algorithm of the resumed session instead of determining
1540 it from client hello again. Don't allow server to change algorithm.
1543 *) Add load_crls() function to apps tidying load_certs() too. Add option
1544 to verify utility to allow additional CRLs to be included.
1547 *) Update OCSP request code to permit adding custom headers to the request:
1548 some responders need this.
1551 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
1553 [Julia Lawall <julia@diku.dk>]
1555 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
1556 needlessly dereferenced structures, used obsolete functions and
1557 didn't handle all updated verify codes correctly.
1560 *) Disable MD2 in the default configuration.
1563 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
1564 indicate the initial BIO being pushed or popped. This makes it possible
1565 to determine whether the BIO is the one explicitly called or as a result
1566 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
1567 it handles reference counts correctly and doesn't zero out the I/O bio
1568 when it is not being explicitly popped. WARNING: applications which
1569 included workarounds for the old buggy behaviour will need to be modified
1570 or they could free up already freed BIOs.
1573 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
1574 renaming to all platforms (within the 0.9.8 branch, this was
1575 done conditionally on Netware platforms to avoid a name clash).
1576 [Guenter <lists@gknw.net>]
1578 *) Add ECDHE and PSK support to DTLS.
1579 [Michael Tuexen <tuexen@fh-muenster.de>]
1581 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
1585 *) Add "missing" function EVP_MD_flags() (without this the only way to
1586 retrieve a digest flags is by accessing the structure directly. Update
1587 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
1588 or cipher is registered as in the "from" argument. Print out all
1589 registered digests in the dgst usage message instead of manually
1590 attempting to work them out.
1593 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
1594 this allows the use of compression and extensions. Change default cipher
1595 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
1596 by default unless an application cipher string requests it.
1599 *) Alter match criteria in PKCS12_parse(). It used to try to use local
1600 key ids to find matching certificates and keys but some PKCS#12 files
1601 don't follow the (somewhat unwritten) rules and this strategy fails.
1602 Now just gather all certificates together and the first private key
1603 then look for the first certificate that matches the key.
1606 *) Support use of registered digest and cipher names for dgst and cipher
1607 commands instead of having to add each one as a special case. So now
1614 openssl dgst -sha256 foo
1616 and this works for ENGINE based algorithms too.
1620 *) Update Gost ENGINE to support parameter files.
1621 [Victor B. Wagner <vitus@cryptocom.ru>]
1623 *) Support GeneralizedTime in ca utility.
1624 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
1626 *) Enhance the hash format used for certificate directory links. The new
1627 form uses the canonical encoding (meaning equivalent names will work
1628 even if they aren't identical) and uses SHA1 instead of MD5. This form
1629 is incompatible with the older format and as a result c_rehash should
1630 be used to rebuild symbolic links.
1633 *) Make PKCS#8 the default write format for private keys, replacing the
1634 traditional format. This form is standardised, more secure and doesn't
1635 include an implicit MD5 dependency.
1638 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
1639 committed to OpenSSL should pass this lot as a minimum.
1642 *) Add session ticket override functionality for use by EAP-FAST.
1643 [Jouni Malinen <j@w1.fi>]
1645 *) Modify HMAC functions to return a value. Since these can be implemented
1646 in an ENGINE errors can occur.
1649 *) Type-checked OBJ_bsearch_ex.
1652 *) Type-checked OBJ_bsearch. Also some constification necessitated
1653 by type-checking. Still to come: TXT_DB, bsearch(?),
1654 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
1658 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
1659 seconds to a tm structure directly, instead of going through OS
1660 specific date routines. This avoids any issues with OS routines such
1661 as the year 2038 bug. New *_adj() functions for ASN1 time structures
1662 and X509_time_adj_ex() to cover the extended range. The existing
1663 X509_time_adj() is still usable and will no longer have any date issues.
1666 *) Delta CRL support. New use deltas option which will attempt to locate
1667 and search any appropriate delta CRLs available.
1669 This work was sponsored by Google.
1672 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
1673 code and add additional score elements. Validate alternate CRL paths
1674 as part of the CRL checking and indicate a new error "CRL path validation
1675 error" in this case. Applications wanting additional details can use
1676 the verify callback and check the new "parent" field. If this is not
1677 NULL CRL path validation is taking place. Existing applications wont
1678 see this because it requires extended CRL support which is off by
1681 This work was sponsored by Google.
1684 *) Support for freshest CRL extension.
1686 This work was sponsored by Google.
1689 *) Initial indirect CRL support. Currently only supported in the CRLs
1690 passed directly and not via lookup. Process certificate issuer
1691 CRL entry extension and lookup CRL entries by bother issuer name
1692 and serial number. Check and process CRL issuer entry in IDP extension.
1694 This work was sponsored by Google.
1697 *) Add support for distinct certificate and CRL paths. The CRL issuer
1698 certificate is validated separately in this case. Only enabled if
1699 an extended CRL support flag is set: this flag will enable additional
1700 CRL functionality in future.
1702 This work was sponsored by Google.
1705 *) Add support for policy mappings extension.
1707 This work was sponsored by Google.
1710 *) Fixes to pathlength constraint, self issued certificate handling,
1711 policy processing to align with RFC3280 and PKITS tests.
1713 This work was sponsored by Google.
1716 *) Support for name constraints certificate extension. DN, email, DNS
1717 and URI types are currently supported.
1719 This work was sponsored by Google.
1722 *) To cater for systems that provide a pointer-based thread ID rather
1723 than numeric, deprecate the current numeric thread ID mechanism and
1724 replace it with a structure and associated callback type. This
1725 mechanism allows a numeric "hash" to be extracted from a thread ID in
1726 either case, and on platforms where pointers are larger than 'long',
1727 mixing is done to help ensure the numeric 'hash' is usable even if it
1728 can't be guaranteed unique. The default mechanism is to use "&errno"
1729 as a pointer-based thread ID to distinguish between threads.
1731 Applications that want to provide their own thread IDs should now use
1732 CRYPTO_THREADID_set_callback() to register a callback that will call
1733 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
1735 Note that ERR_remove_state() is now deprecated, because it is tied
1736 to the assumption that thread IDs are numeric. ERR_remove_state(0)
1737 to free the current thread's error state should be replaced by
1738 ERR_remove_thread_state(NULL).
1740 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
1741 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
1742 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
1743 application was previously providing a numeric thread callback that
1744 was inappropriate for distinguishing threads, then uniqueness might
1745 have been obtained with &errno that happened immediately in the
1746 intermediate development versions of OpenSSL; this is no longer the
1747 case, the numeric thread callback will now override the automatic use
1749 [Geoff Thorpe, with help from Bodo Moeller]
1751 *) Initial support for different CRL issuing certificates. This covers a
1752 simple case where the self issued certificates in the chain exist and
1753 the real CRL issuer is higher in the existing chain.
1755 This work was sponsored by Google.
1758 *) Removed effectively defunct crypto/store from the build.
1761 *) Revamp of STACK to provide stronger type-checking. Still to come:
1762 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
1763 ASN1_STRING, CONF_VALUE.
1766 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
1767 RAM on SSL connections. This option can save about 34k per idle SSL.
1770 *) Revamp of LHASH to provide stronger type-checking. Still to come:
1771 STACK, TXT_DB, bsearch, qsort.
1774 *) Initial support for Cryptographic Message Syntax (aka CMS) based
1775 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
1776 support for data, signedData, compressedData, digestedData and
1777 encryptedData, envelopedData types included. Scripts to check against
1778 RFC4134 examples draft and interop and consistency checks of many
1779 content types and variants.
1782 *) Add options to enc utility to support use of zlib compression BIO.
1785 *) Extend mk1mf to support importing of options and assembly language
1786 files from Configure script, currently only included in VC-WIN32.
1787 The assembly language rules can now optionally generate the source
1788 files from the associated perl scripts.
1791 *) Implement remaining functionality needed to support GOST ciphersuites.
1792 Interop testing has been performed using CryptoPro implementations.
1793 [Victor B. Wagner <vitus@cryptocom.ru>]
1795 *) s390x assembler pack.
1798 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
1802 *) Implement Opaque PRF Input TLS extension as specified in
1803 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
1804 official specification yet and no extension type assignment by
1805 IANA exists, this extension (for now) will have to be explicitly
1806 enabled when building OpenSSL by providing the extension number
1807 to use. For example, specify an option
1809 -DTLSEXT_TYPE_opaque_prf_input=0x9527
1811 to the "config" or "Configure" script to enable the extension,
1812 assuming extension number 0x9527 (which is a completely arbitrary
1813 and unofficial assignment based on the MD5 hash of the Internet
1814 Draft). Note that by doing so, you potentially lose
1815 interoperability with other TLS implementations since these might
1816 be using the same extension number for other purposes.
1818 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
1819 opaque PRF input value to use in the handshake. This will create
1820 an interal copy of the length-'len' string at 'src', and will
1821 return non-zero for success.
1823 To get more control and flexibility, provide a callback function
1826 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
1827 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
1831 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
1834 Callback function 'cb' will be called in handshakes, and is
1835 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
1836 Argument 'arg' is for application purposes (the value as given to
1837 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
1838 be provided to the callback function). The callback function
1839 has to return non-zero to report success: usually 1 to use opaque
1840 PRF input just if possible, or 2 to enforce use of the opaque PRF
1841 input. In the latter case, the library will abort the handshake
1842 if opaque PRF input is not successfully negotiated.
1844 Arguments 'peerinput' and 'len' given to the callback function
1845 will always be NULL and 0 in the case of a client. A server will
1846 see the client's opaque PRF input through these variables if
1847 available (NULL and 0 otherwise). Note that if the server
1848 provides an opaque PRF input, the length must be the same as the
1849 length of the client's opaque PRF input.
1851 Note that the callback function will only be called when creating
1852 a new session (session resumption can resume whatever was
1853 previously negotiated), and will not be called in SSL 2.0
1854 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
1855 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
1856 for applications that need to enforce opaque PRF input.
1860 *) Update ssl code to support digests other than SHA1+MD5 for handshake
1863 [Victor B. Wagner <vitus@cryptocom.ru>]
1865 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1866 RFC4507bis. The encrypted ticket format is an encrypted encoded
1867 SSL_SESSION structure, that way new session features are automatically
1870 If a client application caches session in an SSL_SESSION structure
1871 support is transparent because tickets are now stored in the encoded
1874 The SSL_CTX structure automatically generates keys for ticket
1875 protection in servers so again support should be possible
1876 with no application modification.
1878 If a client or server wishes to disable RFC4507 support then the option
1879 SSL_OP_NO_TICKET can be set.
1881 Add a TLS extension debugging callback to allow the contents of any client
1882 or server extensions to be examined.
1884 This work was sponsored by Google.
1887 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
1888 OpenSSL should now compile cleanly on gcc 4.2
1889 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
1891 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
1892 support including streaming MAC support: this is required for GOST
1893 ciphersuite support.
1894 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
1896 *) Add option -stream to use PKCS#7 streaming in smime utility. New
1897 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
1898 to output in BER and PEM format.
1901 *) Experimental support for use of HMAC via EVP_PKEY interface. This
1902 allows HMAC to be handled via the EVP_DigestSign*() interface. The
1903 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
1904 ENGINE support for HMAC keys which are unextractable. New -mac and
1905 -macopt options to dgst utility.
1908 *) New option -sigopt to dgst utility. Update dgst to use
1909 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
1910 alternative signing paramaters such as X9.31 or PSS in the dgst
1914 *) Change ssl_cipher_apply_rule(), the internal function that does
1915 the work each time a ciphersuite string requests enabling
1916 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
1917 removing ("!foo+bar") a class of ciphersuites: Now it maintains
1918 the order of disabled ciphersuites such that those ciphersuites
1919 that most recently went from enabled to disabled not only stay
1920 in order with respect to each other, but also have higher priority
1921 than other disabled ciphersuites the next time ciphersuites are
1924 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
1925 the same ciphersuites as with "HIGH" alone, but in a specific
1926 order where the PSK ciphersuites come first (since they are the
1927 most recently disabled ciphersuites when "HIGH" is parsed).
1929 Also, change ssl_create_cipher_list() (using this new
1930 funcionality) such that between otherwise identical
1931 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
1935 *) Change ssl_create_cipher_list() so that it automatically
1936 arranges the ciphersuites in reasonable order before starting
1937 to process the rule string. Thus, the definition for "DEFAULT"
1938 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
1939 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
1940 This makes it much easier to arrive at a reasonable default order
1941 in applications for which anonymous ciphers are OK (meaning
1942 that you can't actually use DEFAULT).
1943 [Bodo Moeller; suggested by Victor Duchovni]
1945 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
1946 processing) into multiple integers instead of setting
1947 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
1948 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
1949 (These masks as well as the individual bit definitions are hidden
1950 away into the non-exported interface ssl/ssl_locl.h, so this
1951 change to the definition of the SSL_CIPHER structure shouldn't
1952 affect applications.) This give us more bits for each of these
1953 categories, so there is no longer a need to coagulate AES128 and
1954 AES256 into a single algorithm bit, and to coagulate Camellia128
1955 and Camellia256 into a single algorithm bit, which has led to all
1958 Thus, among other things, the kludge introduced in 0.9.7m and
1959 0.9.8e for masking out AES256 independently of AES128 or masking
1960 out Camellia256 independently of AES256 is not needed here in 0.9.9.
1962 With the change, we also introduce new ciphersuite aliases that
1963 so far were missing: "AES128", "AES256", "CAMELLIA128", and
1967 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
1968 Use the leftmost N bytes of the signature input if the input is
1969 larger than the prime q (with N being the size in bytes of q).
1972 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
1973 it yet and it is largely untested.
1976 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
1979 *) Initial incomplete changes to avoid need for function casts in OpenSSL
1980 some compilers (gcc 4.2 and later) reject their use. Safestack is
1981 reimplemented. Update ASN1 to avoid use of legacy functions.
1984 *) Win32/64 targets are linked with Winsock2.
1987 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
1988 to external functions. This can be used to increase CRL handling
1989 efficiency especially when CRLs are very large by (for example) storing
1990 the CRL revoked certificates in a database.
1993 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
1994 new CRLs added to a directory can be used. New command line option
1995 -verify_return_error to s_client and s_server. This causes real errors
1996 to be returned by the verify callback instead of carrying on no matter
1997 what. This reflects the way a "real world" verify callback would behave.
2000 *) GOST engine, supporting several GOST algorithms and public key formats.
2001 Kindly donated by Cryptocom.
2004 *) Partial support for Issuing Distribution Point CRL extension. CRLs
2005 partitioned by DP are handled but no indirect CRL or reason partitioning
2006 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
2007 selected via a scoring technique which handles IDP and AKID in CRLs.
2010 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
2011 will ultimately be used for all verify operations: this will remove the
2012 X509_STORE dependency on certificate verification and allow alternative
2013 lookup methods. X509_STORE based implementations of these two callbacks.
2016 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
2017 Modify get_crl() to find a valid (unexpired) CRL if possible.
2020 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
2021 this would be called X509_CRL_cmp() but that name is already used by
2022 a function that just compares CRL issuer names. Cache several CRL
2023 extensions in X509_CRL structure and cache CRLDP in X509.
2026 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
2027 this maps equivalent X509_NAME structures into a consistent structure.
2028 Name comparison can then be performed rapidly using memcmp().
2031 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
2035 *) Allow digests to supply their own micalg string for S/MIME type using
2036 the ctrl EVP_MD_CTRL_MICALG.
2039 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
2040 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
2041 ctrl. It can then customise the structure before and/or after signing
2045 *) New function OBJ_add_sigid() to allow application defined signature OIDs
2046 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
2047 to free up any added signature OIDs.
2050 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
2051 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
2052 digest and cipher tables. New options added to openssl utility:
2053 list-message-digest-algorithms and list-cipher-algorithms.
2056 *) Change the array representation of binary polynomials: the list
2057 of degrees of non-zero coefficients is now terminated with -1.
2058 Previously it was terminated with 0, which was also part of the
2059 value; thus, the array representation was not applicable to
2060 polynomials where t^0 has coefficient zero. This change makes
2061 the array representation useful in a more general context.
2064 *) Various modifications and fixes to SSL/TLS cipher string
2065 handling. For ECC, the code now distinguishes between fixed ECDH
2066 with RSA certificates on the one hand and with ECDSA certificates
2067 on the other hand, since these are separate ciphersuites. The
2068 unused code for Fortezza ciphersuites has been removed.
2070 For consistency with EDH, ephemeral ECDH is now called "EECDH"
2071 (not "ECDHE"). For consistency with the code for DH
2072 certificates, use of ECDH certificates is now considered ECDH
2073 authentication, not RSA or ECDSA authentication (the latter is
2074 merely the CA's signing algorithm and not actively used in the
2077 The temporary ciphersuite alias "ECCdraft" is no longer
2078 available, and ECC ciphersuites are no longer excluded from "ALL"
2079 and "DEFAULT". The following aliases now exist for RFC 4492
2080 ciphersuites, most of these by analogy with the DH case:
2082 kECDHr - ECDH cert, signed with RSA
2083 kECDHe - ECDH cert, signed with ECDSA
2084 kECDH - ECDH cert (signed with either RSA or ECDSA)
2085 kEECDH - ephemeral ECDH
2086 ECDH - ECDH cert or ephemeral ECDH
2092 AECDH - anonymous ECDH
2093 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
2097 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
2098 Use correct micalg parameters depending on digest(s) in signed message.
2101 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
2102 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
2105 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
2106 an engine to register a method. Add ENGINE lookups for methods and
2107 functional reference processing.
2110 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
2111 EVP_{Sign,Verify}* which allow an application to customise the signature
2115 *) New -resign option to smime utility. This adds one or more signers
2116 to an existing PKCS#7 signedData structure. Also -md option to use an
2117 alternative message digest algorithm for signing.
2120 *) Tidy up PKCS#7 routines and add new functions to make it easier to
2121 create PKCS7 structures containing multiple signers. Update smime
2122 application to support multiple signers.
2125 *) New -macalg option to pkcs12 utility to allow setting of an alternative
2129 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
2130 Reorganize PBE internals to lookup from a static table using NIDs,
2131 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
2132 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
2133 PRF which will be automatically used with PBES2.
2136 *) Replace the algorithm specific calls to generate keys in "req" with the
2140 *) Update PKCS#7 enveloped data routines to use new API. This is now
2141 supported by any public key method supporting the encrypt operation. A
2142 ctrl is added to allow the public key algorithm to examine or modify
2143 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
2147 *) Add a ctrl to asn1 method to allow a public key algorithm to express
2148 a default digest type to use. In most cases this will be SHA1 but some
2149 algorithms (such as GOST) need to specify an alternative digest. The
2150 return value indicates how strong the preference is 1 means optional and
2151 2 is mandatory (that is it is the only supported type). Modify
2152 ASN1_item_sign() to accept a NULL digest argument to indicate it should
2153 use the default md. Update openssl utilities to use the default digest
2154 type for signing if it is not explicitly indicated.
2157 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
2158 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
2159 signing method from the key type. This effectively removes the link
2160 between digests and public key types.
2163 *) Add an OID cross reference table and utility functions. Its purpose is to
2164 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
2165 rsaEncryption. This will allow some of the algorithm specific hackery
2166 needed to use the correct OID to be removed.
2169 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
2170 structures for PKCS7_sign(). They are now set up by the relevant public
2174 *) Add provisional EC pkey method with support for ECDSA and ECDH.
2177 *) Add support for key derivation (agreement) in the API, DH method and
2181 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
2182 public and private key formats. As a side effect these add additional
2183 command line functionality not previously available: DSA signatures can be
2184 generated and verified using pkeyutl and DH key support and generation in
2189 [Oliver Tappe <zooey@hirschkaefer.de>]
2191 *) New make target "install_html_docs" installs HTML renditions of the
2193 [Oliver Tappe <zooey@hirschkaefer.de>]
2195 *) New utility "genpkey" this is analogous to "genrsa" etc except it can
2196 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
2197 support key and parameter generation and add initial key generation
2198 functionality for RSA.
2201 *) Add functions for main EVP_PKEY_method operations. The undocumented
2202 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
2203 EVP_PKEY_{encrypt,decrypt}_old.
2206 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
2207 key API, doesn't do much yet.
2210 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
2211 public key algorithms. New option to openssl utility:
2212 "list-public-key-algorithms" to print out info.
2215 *) Implement the Supported Elliptic Curves Extension for
2216 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2219 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
2220 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
2223 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
2224 utilities such as rsa, dsa, dsaparam etc except they process any key
2228 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
2229 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
2230 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
2234 *) Initial support for pluggable public key ASN1.
2235 De-spaghettify the public key ASN1 handling. Move public and private
2236 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
2237 algorithm specific handling to a single module within the relevant
2238 algorithm directory. Add functions to allow (near) opaque processing
2239 of public and private key structures.
2242 *) Implement the Supported Point Formats Extension for
2243 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2246 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
2247 for the psk identity [hint] and the psk callback functions to the
2248 SSL_SESSION, SSL and SSL_CTX structure.
2251 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
2255 SSL_CTX_use_psk_identity_hint
2256 SSL_get_psk_identity_hint
2257 SSL_get_psk_identity
2258 SSL_use_psk_identity_hint
2260 [Mika Kousa and Pasi Eronen of Nokia Corporation]
2262 *) Add RFC 3161 compliant time stamp request creation, response generation
2263 and response verification functionality.
2264 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
2266 *) Add initial support for TLS extensions, specifically for the server_name
2267 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2268 have new members for a host name. The SSL data structure has an
2269 additional member SSL_CTX *initial_ctx so that new sessions can be
2270 stored in that context to allow for session resumption, even after the
2271 SSL has been switched to a new SSL_CTX in reaction to a client's
2272 server_name extension.
2274 New functions (subject to change):
2276 SSL_get_servername()
2277 SSL_get_servername_type()
2280 New CTRL codes and macros (subject to change):
2282 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2283 - SSL_CTX_set_tlsext_servername_callback()
2284 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2285 - SSL_CTX_set_tlsext_servername_arg()
2286 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2288 openssl s_client has a new '-servername ...' option.
2290 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2291 '-key2 ...', '-servername_fatal' (subject to change). This allows
2292 testing the HostName extension for a specific single host name ('-cert'
2293 and '-key' remain fallbacks for handshakes without HostName
2294 negotiation). If the unrecognized_name alert has to be sent, this by
2295 default is a warning; it becomes fatal with the '-servername_fatal'
2298 [Peter Sylvester, Remy Allais, Christophe Renou]
2300 *) Whirlpool hash implementation is added.
2303 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
2304 bn(64,32). Because of instruction set limitations it doesn't have
2305 any negative impact on performance. This was done mostly in order
2306 to make it possible to share assembler modules, such as bn_mul_mont
2307 implementations, between 32- and 64-bit builds without hassle.
2310 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
2311 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
2315 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
2316 dedicated Montgomery multiplication procedure, is introduced.
2317 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
2318 "64-bit" performance on certain 32-bit targets.
2321 *) New option SSL_OP_NO_COMP to disable use of compression selectively
2322 in SSL structures. New SSL ctrl to set maximum send fragment size.
2323 Save memory by seeting the I/O buffer sizes dynamically instead of
2324 using the maximum available value.
2327 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
2328 in addition to the text details.
2331 *) Very, very preliminary EXPERIMENTAL support for printing of general
2332 ASN1 structures. This currently produces rather ugly output and doesn't
2333 handle several customised structures at all.
2336 *) Integrated support for PVK file format and some related formats such
2337 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
2338 these in the 'rsa' and 'dsa' utilities.
2341 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
2344 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
2345 place for the (very old) "NETSCAPE" format certificates which are now
2346 handled using new ASN1 code equivalents.
2349 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
2350 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
2351 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
2354 *) Modify CRL distribution points extension code to print out previously
2355 unsupported fields. Enhance extension setting code to allow setting of
2359 *) Add print and set support for Issuing Distribution Point CRL extension.
2362 *) Change 'Configure' script to enable Camellia by default.
2365 Changes between 0.9.8x and 0.9.8y [5 Feb 2013]
2367 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
2369 This addresses the flaw in CBC record processing discovered by
2370 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
2371 at: http://www.isg.rhul.ac.uk/tls/
2373 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
2374 Security Group at Royal Holloway, University of London
2375 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
2376 Emilia Käsper for the initial patch.
2378 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
2380 *) Return an error when checking OCSP signatures when key is NULL.
2381 This fixes a DoS attack. (CVE-2013-0166)
2384 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
2385 the right response is stapled. Also change SSL_get_certificate()
2386 so it returns the certificate actually sent.
2387 See http://rt.openssl.org/Ticket/Display.html?id=2836.
2388 (This is a backport)
2389 [Rob Stradling <rob.stradling@comodo.com>]
2391 *) Fix possible deadlock when decoding public keys.
2394 Changes between 0.9.8w and 0.9.8x [10 May 2012]
2396 *) Sanity check record length before skipping explicit IV in DTLS
2399 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
2400 fuzzing as a service testing platform.
2404 *) Initialise tkeylen properly when encrypting CMS messages.
2405 Thanks to Solar Designer of Openwall for reporting this issue.
2408 Changes between 0.9.8v and 0.9.8w [23 Apr 2012]
2410 *) The fix for CVE-2012-2110 did not take into account that the
2411 'len' argument to BUF_MEM_grow and BUF_MEM_grow_clean is an
2412 int in OpenSSL 0.9.8, making it still vulnerable. Fix by
2413 rejecting negative len parameter. (CVE-2012-2131)
2414 [Tomas Hoger <thoger@redhat.com>]
2416 Changes between 0.9.8u and 0.9.8v [19 Apr 2012]
2418 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
2419 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
2420 in CRYPTO_realloc_clean.
2422 Thanks to Tavis Ormandy, Google Security Team, for discovering this
2423 issue and to Adam Langley <agl@chromium.org> for fixing it.
2425 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
2427 Changes between 0.9.8t and 0.9.8u [12 Mar 2012]
2429 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
2430 in CMS and PKCS7 code. When RSA decryption fails use a random key for
2431 content decryption and always return the same error. Note: this attack
2432 needs on average 2^20 messages so it only affects automated senders. The
2433 old behaviour can be reenabled in the CMS code by setting the
2434 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
2435 an MMA defence is not necessary.
2436 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
2437 this issue. (CVE-2012-0884)
2440 *) Fix CVE-2011-4619: make sure we really are receiving a
2441 client hello before rejecting multiple SGC restarts. Thanks to
2442 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
2445 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
2447 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
2448 Thanks to Antonio Martin, Enterprise Secure Access Research and
2449 Development, Cisco Systems, Inc. for discovering this bug and
2450 preparing a fix. (CVE-2012-0050)
2453 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
2455 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
2456 of the Vaudenay padding oracle attack on CBC mode encryption
2457 which enables an efficient plaintext recovery attack against
2458 the OpenSSL implementation of DTLS. Their attack exploits timing
2459 differences arising during decryption processing. A research
2460 paper describing this attack can be found at:
2461 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
2462 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
2463 Security Group at Royal Holloway, University of London
2464 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
2465 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
2466 for preparing the fix. (CVE-2011-4108)
2467 [Robin Seggelmann, Michael Tuexen]
2469 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
2470 [Ben Laurie, Kasper <ekasper@google.com>]
2472 *) Clear bytes used for block padding of SSL 3.0 records.
2474 [Adam Langley (Google)]
2476 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
2477 Kadianakis <desnacked@gmail.com> for discovering this issue and
2478 Adam Langley for preparing the fix. (CVE-2011-4619)
2479 [Adam Langley (Google)]
2481 *) Prevent malformed RFC3779 data triggering an assertion failure.
2482 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
2483 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
2484 [Rob Austein <sra@hactrn.net>]
2486 *) Fix ssl_ciph.c set-up race.
2487 [Adam Langley (Google)]
2489 *) Fix spurious failures in ecdsatest.c.
2490 [Emilia Käsper (Google)]
2492 *) Fix the BIO_f_buffer() implementation (which was mixing different
2493 interpretations of the '..._len' fields).
2494 [Adam Langley (Google)]
2496 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
2497 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
2498 threads won't reuse the same blinding coefficients.
2500 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
2501 lock to call BN_BLINDING_invert_ex, and avoids one use of
2502 BN_BLINDING_update for each BN_BLINDING structure (previously,
2503 the last update always remained unused).
2504 [Emilia Käsper (Google)]
2506 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
2507 for multi-threaded use of ECDH.
2508 [Adam Langley (Google)]
2510 *) Fix x509_name_ex_d2i memory leak on bad inputs.
2513 *) Add protection against ECDSA timing attacks as mentioned in the paper
2514 by Billy Bob Brumley and Nicola Tuveri, see:
2516 http://eprint.iacr.org/2011/232.pdf
2518 [Billy Bob Brumley and Nicola Tuveri]
2520 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
2522 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
2523 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
2525 *) Fix bug in string printing code: if *any* escaping is enabled we must
2526 escape the escape character (backslash) or the resulting string is
2530 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
2532 *) Disable code workaround for ancient and obsolete Netscape browsers
2533 and servers: an attacker can use it in a ciphersuite downgrade attack.
2534 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
2537 *) Fixed J-PAKE implementation error, originally discovered by
2538 Sebastien Martini, further info and confirmation from Stefan
2539 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
2542 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
2544 *) Fix extension code to avoid race conditions which can result in a buffer
2545 overrun vulnerability: resumed sessions must not be modified as they can
2546 be shared by multiple threads. CVE-2010-3864
2549 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
2552 *) Don't reencode certificate when calculating signature: cache and use
2553 the original encoding instead. This makes signature verification of
2554 some broken encodings work correctly.
2557 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
2558 is also one of the inputs.
2559 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
2561 *) Don't repeatedly append PBE algorithms to table if they already exist.
2562 Sort table on each new add. This effectively makes the table read only
2563 after all algorithms are added and subsequent calls to PKCS12_pbe_add
2567 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
2569 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
2572 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
2573 access or freeing data twice (CVE-2010-0742)
2574 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
2576 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
2577 common in certificates and some applications which only call
2578 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
2582 Reduce copying into .apps and .test in makevms.com
2583 Don't try to use blank CA certificate in CA.com
2584 Allow use of C files from original directories in maketests.com
2585 [Steven M. Schweda" <sms@antinode.info>]
2587 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
2589 *) When rejecting SSL/TLS records due to an incorrect version number, never
2590 update s->server with a new major version number. As of
2591 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
2592 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
2593 the previous behavior could result in a read attempt at NULL when
2594 receiving specific incorrect SSL/TLS records once record payload
2595 protection is active. (CVE-2010-0740)
2596 [Bodo Moeller, Adam Langley <agl@chromium.org>]
2598 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
2599 could be crashed if the relevant tables were not present (e.g. chrooted).
2600 [Tomas Hoger <thoger@redhat.com>]
2602 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
2604 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
2605 [Martin Olsson, Neel Mehta]
2607 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
2608 accommodate for stack sorting, always a write lock!).
2611 *) On some versions of WIN32 Heap32Next is very slow. This can cause
2612 excessive delays in the RAND_poll(): over a minute. As a workaround
2613 include a time check in the inner Heap32Next loop too.
2616 *) The code that handled flushing of data in SSL/TLS originally used the
2617 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
2618 the problem outlined in PR#1949. The fix suggested there however can
2619 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
2620 of Apache). So instead simplify the code to flush unconditionally.
2621 This should be fine since flushing with no data to flush is a no op.
2624 *) Handle TLS versions 2.0 and later properly and correctly use the
2625 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
2626 off ancient servers have a habit of sticking around for a while...
2629 *) Modify compression code so it frees up structures without using the
2630 ex_data callbacks. This works around a problem where some applications
2631 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
2632 restarting) then use compression (e.g. SSL with compression) later.
2633 This results in significant per-connection memory leaks and
2634 has caused some security issues including CVE-2008-1678 and
2638 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
2639 change when encrypting or decrypting.
2642 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
2643 connect and renegotiate with servers which do not support RI.
2644 Until RI is more widely deployed this option is enabled by default.
2647 *) Add "missing" ssl ctrls to clear options and mode.
2650 *) If client attempts to renegotiate and doesn't support RI respond with
2651 a no_renegotiation alert as required by RFC5746. Some renegotiating
2652 TLS clients will continue a connection gracefully when they receive
2653 the alert. Unfortunately OpenSSL mishandled this alert and would hang
2654 waiting for a server hello which it will never receive. Now we treat a
2655 received no_renegotiation alert as a fatal error. This is because
2656 applications requesting a renegotiation might well expect it to succeed
2657 and would have no code in place to handle the server denying it so the
2658 only safe thing to do is to terminate the connection.
2661 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
2662 peer supports secure renegotiation and 0 otherwise. Print out peer
2663 renegotiation support in s_client/s_server.
2666 *) Replace the highly broken and deprecated SPKAC certification method with
2667 the updated NID creation version. This should correctly handle UTF8.
2670 *) Implement RFC5746. Re-enable renegotiation but require the extension
2671 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
2672 turns out to be a bad idea. It has been replaced by
2673 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
2674 SSL_CTX_set_options(). This is really not recommended unless you
2675 know what you are doing.
2676 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
2678 *) Fixes to stateless session resumption handling. Use initial_ctx when
2679 issuing and attempting to decrypt tickets in case it has changed during
2680 servername handling. Use a non-zero length session ID when attempting
2681 stateless session resumption: this makes it possible to determine if
2682 a resumption has occurred immediately after receiving server hello
2683 (several places in OpenSSL subtly assume this) instead of later in
2687 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
2688 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
2689 fixes for a few places where the return code is not checked
2691 [Julia Lawall <julia@diku.dk>]
2693 *) Add --strict-warnings option to Configure script to include devteam
2694 warnings in other configurations.
2697 *) Add support for --libdir option and LIBDIR variable in makefiles. This
2698 makes it possible to install openssl libraries in locations which
2699 have names other than "lib", for example "/usr/lib64" which some
2701 [Steve Henson, based on patch from Jeremy Utley]
2703 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
2704 X690 8.9.12 and can produce some misleading textual output of OIDs.
2705 [Steve Henson, reported by Dan Kaminsky]
2707 *) Delete MD2 from algorithm tables. This follows the recommendation in
2708 several standards that it is not used in new applications due to
2709 several cryptographic weaknesses. For binary compatibility reasons
2710 the MD2 API is still compiled in by default.
2713 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
2717 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
2718 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
2720 [Guenter <lists@gknw.net>]
2722 *) Fix the server certificate chain building code to use X509_verify_cert(),
2723 it used to have an ad-hoc builder which was unable to cope with anything
2724 other than a simple chain.
2725 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
2727 *) Don't check self signed certificate signatures in X509_verify_cert()
2728 by default (a flag can override this): it just wastes time without
2729 adding any security. As a useful side effect self signed root CAs
2730 with non-FIPS digests are now usable in FIPS mode.
2733 *) In dtls1_process_out_of_seq_message() the check if the current message
2734 is already buffered was missing. For every new message was memory
2735 allocated, allowing an attacker to perform an denial of service attack
2736 with sending out of seq handshake messages until there is no memory
2737 left. Additionally every future messege was buffered, even if the
2738 sequence number made no sense and would be part of another handshake.
2739 So only messages with sequence numbers less than 10 in advance will be
2740 buffered. (CVE-2009-1378)
2741 [Robin Seggelmann, discovered by Daniel Mentz]
2743 *) Records are buffered if they arrive with a future epoch to be
2744 processed after finishing the corresponding handshake. There is
2745 currently no limitation to this buffer allowing an attacker to perform
2746 a DOS attack with sending records with future epochs until there is no
2747 memory left. This patch adds the pqueue_size() function to determine
2748 the size of a buffer and limits the record buffer to 100 entries.
2750 [Robin Seggelmann, discovered by Daniel Mentz]
2752 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
2753 parent structure is freed. (CVE-2009-1379)
2756 *) Handle non-blocking I/O properly in SSL_shutdown() call.
2757 [Darryl Miles <darryl-mailinglists@netbauds.net>]
2760 [Ilya O. <vrghost@gmail.com>]
2762 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
2764 *) Disable renegotiation completely - this fixes a severe security
2765 problem (CVE-2009-3555) at the cost of breaking all
2766 renegotiation. Renegotiation can be re-enabled by setting
2767 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
2768 run-time. This is really not recommended unless you know what
2772 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
2774 *) Don't set val to NULL when freeing up structures, it is freed up by
2775 underlying code. If sizeof(void *) > sizeof(long) this can result in
2776 zeroing past the valid field. (CVE-2009-0789)
2777 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
2779 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
2780 checked correctly. This would allow some invalid signed attributes to
2781 appear to verify correctly. (CVE-2009-0591)
2782 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2784 *) Reject UniversalString and BMPString types with invalid lengths. This
2785 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
2786 a legal length. (CVE-2009-0590)
2789 *) Set S/MIME signing as the default purpose rather than setting it
2790 unconditionally. This allows applications to override it at the store
2794 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2795 to handle some structures.
2798 *) Improve efficiency of mem_gets: don't search whole buffer each time
2800 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2802 *) New -hex option for openssl rand.
2805 *) Print out UTF8String and NumericString when parsing ASN1.
2808 *) Support NumericString type for name components.
2811 *) Allow CC in the environment to override the automatically chosen
2812 compiler. Note that nothing is done to ensure flags work with the
2816 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2818 *) Properly check EVP_VerifyFinal() and similar return values
2820 [Ben Laurie, Bodo Moeller, Google Security Team]
2822 *) Enable TLS extensions by default.
2825 *) Allow the CHIL engine to be loaded, whether the application is
2826 multithreaded or not. (This does not release the developer from the
2827 obligation to set up the dynamic locking callbacks.)
2828 [Sander Temme <sander@temme.net>]
2830 *) Use correct exit code if there is an error in dgst command.
2831 [Steve Henson; problem pointed out by Roland Dirlewanger]
2833 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2834 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2837 *) Add experimental JPAKE support, including demo authentication in
2838 s_client and s_server.
2841 *) Set the comparison function in v3_addr_canonize().
2842 [Rob Austein <sra@hactrn.net>]
2844 *) Add support for XMPP STARTTLS in s_client.
2845 [Philip Paeps <philip@freebsd.org>]
2847 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2848 to ensure that even with this option, only ciphersuites in the
2849 server's preference list will be accepted. (Note that the option
2850 applies only when resuming a session, so the earlier behavior was
2851 just about the algorithm choice for symmetric cryptography.)
2854 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2856 *) Fix NULL pointer dereference if a DTLS server received
2857 ChangeCipherSpec as first record (CVE-2009-1386).
2860 *) Fix a state transition in s3_srvr.c and d1_srvr.c
2861 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2864 *) The fix in 0.9.8c that supposedly got rid of unsafe
2865 double-checked locking was incomplete for RSA blinding,
2866 addressing just one layer of what turns out to have been
2867 doubly unsafe triple-checked locking.
2869 So now fix this for real by retiring the MONT_HELPER macro
2870 in crypto/rsa/rsa_eay.c.
2872 [Bodo Moeller; problem pointed out by Marius Schilder]
2874 *) Various precautionary measures:
2876 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2878 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2879 (NB: This would require knowledge of the secret session ticket key
2880 to exploit, in which case you'd be SOL either way.)
2882 - Change bn_nist.c so that it will properly handle input BIGNUMs
2883 outside the expected range.
2885 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2888 [Neel Mehta, Bodo Moeller]
2890 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2891 the load fails. Useful for distros.
2892 [Ben Laurie and the FreeBSD team]
2894 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2897 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2900 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2902 This work was sponsored by Logica.
2905 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2906 keystores. Support for SSL/TLS client authentication too.
2907 Not compiled unless enable-capieng specified to Configure.
2909 This work was sponsored by Logica.
2912 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2913 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2914 attribute creation routines such as certifcate requests and PKCS#12
2918 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2920 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2921 handshake which could lead to a cilent crash as found using the
2922 Codenomicon TLS test suite (CVE-2008-1672)
2923 [Steve Henson, Mark Cox]
2925 *) Fix double free in TLS server name extensions which could lead to
2926 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2929 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2931 Clear the error queue to ensure that error entries left from
2932 older function calls do not interfere with the correct operation.
2933 [Lutz Jaenicke, Erik de Castro Lopo]
2935 *) Remove root CA certificates of commercial CAs:
2937 The OpenSSL project does not recommend any specific CA and does not
2938 have any policy with respect to including or excluding any CA.
2939 Therefore it does not make any sense to ship an arbitrary selection
2940 of root CA certificates with the OpenSSL software.
2943 *) RSA OAEP patches to fix two separate invalid memory reads.
2944 The first one involves inputs when 'lzero' is greater than
2945 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
2946 before the beginning of from). The second one involves inputs where
2947 the 'db' section contains nothing but zeroes (there is a one-byte
2948 invalid read after the end of 'db').
2949 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2951 *) Partial backport from 0.9.9-dev:
2953 Introduce bn_mul_mont (dedicated Montgomery multiplication
2954 procedure) as a candidate for BIGNUM assembler implementation.
2955 While 0.9.9-dev uses assembler for various architectures, only
2956 x86_64 is available by default here in the 0.9.8 branch, and
2957 32-bit x86 is available through a compile-time setting.
2959 To try the 32-bit x86 assembler implementation, use Configure
2960 option "enable-montasm" (which exists only for this backport).
2962 As "enable-montasm" for 32-bit x86 disclaims code stability
2963 anyway, in this constellation we activate additional code
2964 backported from 0.9.9-dev for further performance improvements,
2965 namely BN_from_montgomery_word. (To enable this otherwise,
2966 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
2968 [Andy Polyakov (backport partially by Bodo Moeller)]
2970 *) Add TLS session ticket callback. This allows an application to set
2971 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
2972 values. This is useful for key rollover for example where several key
2973 sets may exist with different names.
2976 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
2977 This was broken until now in 0.9.8 releases, such that the only way
2978 a registered ENGINE could be used (assuming it initialises
2979 successfully on the host) was to explicitly set it as the default
2980 for the relevant algorithms. This is in contradiction with 0.9.7
2981 behaviour and the documentation. With this fix, when an ENGINE is
2982 registered into a given algorithm's table of implementations, the
2983 'uptodate' flag is reset so that auto-discovery will be used next
2984 time a new context for that algorithm attempts to select an
2986 [Ian Lister (tweaked by Geoff Thorpe)]
2988 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
2989 implemention in the following ways:
2991 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
2994 Lack of BER streaming support means one pass streaming processing is
2995 only supported if data is detached: setting the streaming flag is
2996 ignored for embedded content.
2998 CMS support is disabled by default and must be explicitly enabled
2999 with the enable-cms configuration option.
3002 *) Update the GMP engine glue to do direct copies between BIGNUM and
3003 mpz_t when openssl and GMP use the same limb size. Otherwise the
3004 existing "conversion via a text string export" trick is still used.
3005 [Paul Sheer <paulsheer@gmail.com>]
3007 *) Zlib compression BIO. This is a filter BIO which compressed and
3008 uncompresses any data passed through it.
3011 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
3012 RFC3394 compatible AES key wrapping.
3015 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
3016 sets string data without copying. X509_ALGOR_set0() and
3017 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
3018 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
3019 from an X509_ATTRIBUTE structure optionally checking it occurs only
3020 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
3024 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
3025 to get the expected BN_FLG_CONSTTIME behavior.
3026 [Bodo Moeller (Google)]
3030 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
3031 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
3032 - added some more tests to do_tests.pl
3033 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
3034 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
3035 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
3036 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
3037 - various changes to netware.pl to enable gcc-cross builds on Win32
3039 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
3040 - various changes to fix missing prototype warnings
3041 - fixed x86nasm.pl to create correct asm files for NASM COFF output
3042 - added AES, WHIRLPOOL and CPUID assembler code to build files
3043 - added missing AES assembler make rules to mk1mf.pl
3044 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
3045 [Guenter Knauf <eflash@gmx.net>]
3047 *) Implement certificate status request TLS extension defined in RFC3546.
3048 A client can set the appropriate parameters and receive the encoded
3049 OCSP response via a callback. A server can query the supplied parameters
3050 and set the encoded OCSP response in the callback. Add simplified examples
3051 to s_client and s_server.
3054 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
3056 *) Fix various bugs:
3057 + Binary incompatibility of ssl_ctx_st structure
3058 + DTLS interoperation with non-compliant servers
3059 + Don't call get_session_cb() without proposed session
3060 + Fix ia64 assembler code
3061 [Andy Polyakov, Steve Henson]
3063 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
3065 *) DTLS Handshake overhaul. There were longstanding issues with
3066 OpenSSL DTLS implementation, which were making it impossible for
3067 RFC 4347 compliant client to communicate with OpenSSL server.
3068 Unfortunately just fixing these incompatibilities would "cut off"
3069 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
3070 server keeps tolerating non RFC compliant syntax. The opposite is
3071 not true, 0.9.8f client can not communicate with earlier server.
3072 This update even addresses CVE-2007-4995.
3075 *) Changes to avoid need for function casts in OpenSSL: some compilers
3076 (gcc 4.2 and later) reject their use.
3077 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
3080 *) Add RFC4507 support to OpenSSL. This includes the corrections in
3081 RFC4507bis. The encrypted ticket format is an encrypted encoded
3082 SSL_SESSION structure, that way new session features are automatically
3085 If a client application caches session in an SSL_SESSION structure
3086 support is transparent because tickets are now stored in the encoded
3089 The SSL_CTX structure automatically generates keys for ticket
3090 protection in servers so again support should be possible
3091 with no application modification.
3093 If a client or server wishes to disable RFC4507 support then the option
3094 SSL_OP_NO_TICKET can be set.
3096 Add a TLS extension debugging callback to allow the contents of any client
3097 or server extensions to be examined.
3099 This work was sponsored by Google.
3102 *) Add initial support for TLS extensions, specifically for the server_name
3103 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
3104 have new members for a host name. The SSL data structure has an
3105 additional member SSL_CTX *initial_ctx so that new sessions can be
3106 stored in that context to allow for session resumption, even after the
3107 SSL has been switched to a new SSL_CTX in reaction to a client's
3108 server_name extension.
3110 New functions (subject to change):
3112 SSL_get_servername()
3113 SSL_get_servername_type()
3116 New CTRL codes and macros (subject to change):
3118 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
3119 - SSL_CTX_set_tlsext_servername_callback()
3120 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
3121 - SSL_CTX_set_tlsext_servername_arg()
3122 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
3124 openssl s_client has a new '-servername ...' option.
3126 openssl s_server has new options '-servername_host ...', '-cert2 ...',
3127 '-key2 ...', '-servername_fatal' (subject to change). This allows
3128 testing the HostName extension for a specific single host name ('-cert'
3129 and '-key' remain fallbacks for handshakes without HostName
3130 negotiation). If the unrecognized_name alert has to be sent, this by
3131 default is a warning; it becomes fatal with the '-servername_fatal'
3134 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
3136 *) Add AES and SSE2 assembly language support to VC++ build.
3139 *) Mitigate attack on final subtraction in Montgomery reduction.
3142 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
3143 (which previously caused an internal error).
3146 *) Squeeze another 10% out of IGE mode when in != out.
3149 *) AES IGE mode speedup.
3150 [Dean Gaudet (Google)]
3152 *) Add the Korean symmetric 128-bit cipher SEED (see
3153 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
3154 add SEED ciphersuites from RFC 4162:
3156 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
3157 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
3158 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
3159 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
3161 To minimize changes between patchlevels in the OpenSSL 0.9.8
3162 series, SEED remains excluded from compilation unless OpenSSL
3163 is configured with 'enable-seed'.
3164 [KISA, Bodo Moeller]
3166 *) Mitigate branch prediction attacks, which can be practical if a
3167 single processor is shared, allowing a spy process to extract
3168 information. For detailed background information, see
3169 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
3170 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
3171 and Necessary Software Countermeasures"). The core of the change
3172 are new versions BN_div_no_branch() and
3173 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
3174 respectively, which are slower, but avoid the security-relevant
3175 conditional branches. These are automatically called by BN_div()
3176 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
3177 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
3178 remove a conditional branch.
3180 BN_FLG_CONSTTIME is the new name for the previous
3181 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
3182 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
3183 in the exponent causes BN_mod_exp_mont() to use the alternative
3184 implementation in BN_mod_exp_mont_consttime().) The old name
3185 remains as a deprecated alias.
3187 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
3188 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
3189 constant-time implementations for more than just exponentiation.
3190 Here too the old name is kept as a deprecated alias.
3192 BN_BLINDING_new() will now use BN_dup() for the modulus so that
3193 the BN_BLINDING structure gets an independent copy of the
3194 modulus. This means that the previous "BIGNUM *m" argument to
3195 BN_BLINDING_new() and to BN_BLINDING_create_param() now
3196 essentially becomes "const BIGNUM *m", although we can't actually
3197 change this in the header file before 0.9.9. It allows
3198 RSA_setup_blinding() to use BN_with_flags() on the modulus to
3199 enable BN_FLG_CONSTTIME.
3201 [Matthew D Wood (Intel Corp)]
3203 *) In the SSL/TLS server implementation, be strict about session ID
3204 context matching (which matters if an application uses a single
3205 external cache for different purposes). Previously,
3206 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
3207 set. This did ensure strict client verification, but meant that,
3208 with applications using a single external cache for quite
3209 different requirements, clients could circumvent ciphersuite
3210 restrictions for a given session ID context by starting a session
3211 in a different context.
3214 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3215 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3216 authentication-only ciphersuites.
3219 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
3220 not complete and could lead to a possible single byte overflow
3221 (CVE-2007-5135) [Ben Laurie]
3223 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
3225 *) Since AES128 and AES256 (and similarly Camellia128 and
3226 Camellia256) share a single mask bit in the logic of
3227 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3228 kludge to work properly if AES128 is available and AES256 isn't
3229 (or if Camellia128 is available and Camellia256 isn't).
3232 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
3233 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
3234 When a point or a seed is encoded in a BIT STRING, we need to
3235 prevent the removal of trailing zero bits to get the proper DER
3236 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
3237 of a NamedBitList, for which trailing 0 bits need to be removed.)
3240 *) Have SSL/TLS server implementation tolerate "mismatched" record
3241 protocol version while receiving ClientHello even if the
3242 ClientHello is fragmented. (The server can't insist on the
3243 particular protocol version it has chosen before the ServerHello
3244 message has informed the client about his choice.)
3247 *) Add RFC 3779 support.
3248 [Rob Austein for ARIN, Ben Laurie]
3250 *) Load error codes if they are not already present instead of using a
3251 static variable. This allows them to be cleanly unloaded and reloaded.
3252 Improve header file function name parsing.
3255 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
3256 or CAPABILITY handshake as required by RFCs.
3259 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
3261 *) Introduce limits to prevent malicious keys being able to
3262 cause a denial of service. (CVE-2006-2940)
3263 [Steve Henson, Bodo Moeller]
3265 *) Fix ASN.1 parsing of certain invalid structures that can result
3266 in a denial of service. (CVE-2006-2937) [Steve Henson]
3268 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3269 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3271 *) Fix SSL client code which could crash if connecting to a
3272 malicious SSLv2 server. (CVE-2006-4343)
3273 [Tavis Ormandy and Will Drewry, Google Security Team]
3275 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
3276 match only those. Before that, "AES256-SHA" would be interpreted
3277 as a pattern and match "AES128-SHA" too (since AES128-SHA got
3278 the same strength classification in 0.9.7h) as we currently only
3279 have a single AES bit in the ciphersuite description bitmap.
3280 That change, however, also applied to ciphersuite strings such as
3281 "RC4-MD5" that intentionally matched multiple ciphersuites --
3282 namely, SSL 2.0 ciphersuites in addition to the more common ones
3283 from SSL 3.0/TLS 1.0.
3285 So we change the selection algorithm again: Naming an explicit
3286 ciphersuite selects this one ciphersuite, and any other similar
3287 ciphersuite (same bitmap) from *other* protocol versions.
3288 Thus, "RC4-MD5" again will properly select both the SSL 2.0
3289 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
3291 Since SSL 2.0 does not have any ciphersuites for which the
3292 128/256 bit distinction would be relevant, this works for now.
3293 The proper fix will be to use different bits for AES128 and
3294 AES256, which would have avoided the problems from the beginning;
3295 however, bits are scarce, so we can only do this in a new release
3296 (not just a patchlevel) when we can change the SSL_CIPHER
3297 definition to split the single 'unsigned long mask' bitmap into
3298 multiple values to extend the available space.
3302 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
3304 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3305 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3307 *) Add AES IGE and biIGE modes.
3310 *) Change the Unix randomness entropy gathering to use poll() when
3311 possible instead of select(), since the latter has some
3312 undesirable limitations.
3313 [Darryl Miles via Richard Levitte and Bodo Moeller]
3315 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
3316 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
3317 cannot be implicitly activated as part of, e.g., the "AES" alias.
3318 However, please upgrade to OpenSSL 0.9.9[-dev] for
3319 non-experimental use of the ECC ciphersuites to get TLS extension
3320 support, which is required for curve and point format negotiation
3321 to avoid potential handshake problems.
3324 *) Disable rogue ciphersuites:
3326 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3327 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3328 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3330 The latter two were purportedly from
3331 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3334 Also deactivate the remaining ciphersuites from
3335 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3336 unofficial, and the ID has long expired.
3339 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3340 dual-core machines) and other potential thread-safety issues.
3343 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
3344 versions), which is now available for royalty-free use
3345 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
3346 Also, add Camellia TLS ciphersuites from RFC 4132.
3348 To minimize changes between patchlevels in the OpenSSL 0.9.8
3349 series, Camellia remains excluded from compilation unless OpenSSL
3350 is configured with 'enable-camellia'.
3353 *) Disable the padding bug check when compression is in use. The padding
3354 bug check assumes the first packet is of even length, this is not
3355 necessarily true if compresssion is enabled and can result in false
3356 positives causing handshake failure. The actual bug test is ancient
3357 code so it is hoped that implementations will either have fixed it by
3358 now or any which still have the bug do not support compression.
3361 Changes between 0.9.8a and 0.9.8b [04 May 2006]
3363 *) When applying a cipher rule check to see if string match is an explicit
3364 cipher suite and only match that one cipher suite if it is.
3367 *) Link in manifests for VC++ if needed.
3368 [Austin Ziegler <halostatue@gmail.com>]
3370 *) Update support for ECC-based TLS ciphersuites according to
3371 draft-ietf-tls-ecc-12.txt with proposed changes (but without
3372 TLS extensions, which are supported starting with the 0.9.9
3373 branch, not in the OpenSSL 0.9.8 branch).
3376 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
3377 opaque EVP_CIPHER_CTX handling.
3380 *) Fixes and enhancements to zlib compression code. We now only use
3381 "zlib1.dll" and use the default __cdecl calling convention on Win32
3382 to conform with the standards mentioned here:
3383 http://www.zlib.net/DLL_FAQ.txt
3384 Static zlib linking now works on Windows and the new --with-zlib-include
3385 --with-zlib-lib options to Configure can be used to supply the location
3386 of the headers and library. Gracefully handle case where zlib library
3390 *) Several fixes and enhancements to the OID generation code. The old code
3391 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
3392 handle numbers larger than ULONG_MAX, truncated printing and had a
3393 non standard OBJ_obj2txt() behaviour.
3396 *) Add support for building of engines under engine/ as shared libraries
3397 under VC++ build system.
3400 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
3401 Hopefully, we will not see any false combination of paths any more.
3404 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
3406 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3407 (part of SSL_OP_ALL). This option used to disable the
3408 countermeasure against man-in-the-middle protocol-version
3409 rollback in the SSL 2.0 server implementation, which is a bad
3410 idea. (CVE-2005-2969)
3412 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3413 for Information Security, National Institute of Advanced Industrial
3414 Science and Technology [AIST], Japan)]
3416 *) Add two function to clear and return the verify parameter flags.
3419 *) Keep cipherlists sorted in the source instead of sorting them at
3420 runtime, thus removing the need for a lock.
3423 *) Avoid some small subgroup attacks in Diffie-Hellman.
3424 [Nick Mathewson and Ben Laurie]
3426 *) Add functions for well-known primes.
3429 *) Extended Windows CE support.
3430 [Satoshi Nakamura and Andy Polyakov]
3432 *) Initialize SSL_METHOD structures at compile time instead of during
3433 runtime, thus removing the need for a lock.
3436 *) Make PKCS7_decrypt() work even if no certificate is supplied by
3437 attempting to decrypt each encrypted key in turn. Add support to
3441 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
3443 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
3446 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
3449 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
3450 key into the same file any more.
3453 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
3456 *) Add -utf8 command line and config file option to 'ca'.
3457 [Stefan <stf@udoma.org]
3459 *) Removed the macro des_crypt(), as it seems to conflict with some
3460 libraries. Use DES_crypt().
3463 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
3464 involves renaming the source and generated shared-libs for
3465 both. The engines will accept the corrected or legacy ids
3466 ('ncipher' and '4758_cca' respectively) when binding. NB,
3467 this only applies when building 'shared'.
3468 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
3470 *) Add attribute functions to EVP_PKEY structure. Modify
3471 PKCS12_create() to recognize a CSP name attribute and
3472 use it. Make -CSP option work again in pkcs12 utility.
3475 *) Add new functionality to the bn blinding code:
3476 - automatic re-creation of the BN_BLINDING parameters after
3477 a fixed number of uses (currently 32)
3478 - add new function for parameter creation
3479 - introduce flags to control the update behaviour of the
3480 BN_BLINDING parameters
3481 - hide BN_BLINDING structure
3482 Add a second BN_BLINDING slot to the RSA structure to improve
3483 performance when a single RSA object is shared among several
3487 *) Add support for DTLS.
3488 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
3490 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
3491 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
3494 *) Remove buggy and incomplete DH cert support from
3495 ssl/ssl_rsa.c and ssl/s3_both.c
3498 *) Use SHA-1 instead of MD5 as the default digest algorithm for
3499 the apps/openssl applications.
3502 *) Compile clean with "-Wall -Wmissing-prototypes
3503 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
3504 DEBUG_SAFESTACK must also be set.
3507 *) Change ./Configure so that certain algorithms can be disabled by default.
3508 The new counterpiece to "no-xxx" is "enable-xxx".
3510 The patented RC5 and MDC2 algorithms will now be disabled unless
3511 "enable-rc5" and "enable-mdc2", respectively, are specified.
3513 (IDEA remains enabled despite being patented. This is because IDEA
3514 is frequently required for interoperability, and there is no license
3515 fee for non-commercial use. As before, "no-idea" can be used to
3516 avoid this algorithm.)
3520 *) Add processing of proxy certificates (see RFC 3820). This work was
3521 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
3522 EGEE (Enabling Grids for E-science in Europe).
3525 *) RC4 performance overhaul on modern architectures/implementations, such
3526 as Intel P4, IA-64 and AMD64.
3529 *) New utility extract-section.pl. This can be used specify an alternative
3530 section number in a pod file instead of having to treat each file as
3531 a separate case in Makefile. This can be done by adding two lines to the
3534 =for comment openssl_section:XXX
3536 The blank line is mandatory.
3540 *) New arguments -certform, -keyform and -pass for s_client and s_server
3541 to allow alternative format key and certificate files and passphrase
3545 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
3546 update associated structures and add various utility functions.
3548 Add new policy related verify parameters, include policy checking in
3549 standard verify code. Enhance 'smime' application with extra parameters
3550 to support policy checking and print out.
3553 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
3554 Nehemiah processors. These extensions support AES encryption in hardware
3555 as well as RNG (though RNG support is currently disabled).
3556 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
3558 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
3561 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
3562 [Andy Polyakov and a number of other people]
3564 *) Improved PowerPC platform support. Most notably BIGNUM assembler
3565 implementation contributed by IBM.
3566 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
3568 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
3569 exponent rather than 'unsigned long'. There is a corresponding change to
3570 the new 'rsa_keygen' element of the RSA_METHOD structure.
3571 [Jelte Jansen, Geoff Thorpe]
3573 *) Functionality for creating the initial serial number file is now
3574 moved from CA.pl to the 'ca' utility with a new option -create_serial.
3576 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
3577 number file to 1, which is bound to cause problems. To avoid
3578 the problems while respecting compatibility between different 0.9.7
3579 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
3580 CA.pl for serial number initialization. With the new release 0.9.8,
3581 we can fix the problem directly in the 'ca' utility.)
3584 *) Reduced header interdepencies by declaring more opaque objects in
3585 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
3586 give fewer recursive includes, which could break lazy source code - so
3587 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
3588 developers should define this symbol when building and using openssl to
3589 ensure they track the recommended behaviour, interfaces, [etc], but
3590 backwards-compatible behaviour prevails when this isn't defined.
3593 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
3596 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
3597 This will generate a random key of the appropriate length based on the
3598 cipher context. The EVP_CIPHER can provide its own random key generation
3599 routine to support keys of a specific form. This is used in the des and
3600 3des routines to generate a key of the correct parity. Update S/MIME
3601 code to use new functions and hence generate correct parity DES keys.
3602 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
3603 valid (weak or incorrect parity).
3606 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
3607 as looking them up. This is useful when the verified structure may contain
3608 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
3609 present unless the new PKCS7_NO_CRL flag is asserted.
3612 *) Extend ASN1 oid configuration module. It now additionally accepts the
3615 shortName = some long name, 1.2.3.4
3618 *) Reimplemented the BN_CTX implementation. There is now no more static
3619 limitation on the number of variables it can handle nor the depth of the
3620 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
3621 information can now expand as required, and rather than having a single
3622 static array of bignums, BN_CTX now uses a linked-list of such arrays
3623 allowing it to expand on demand whilst maintaining the usefulness of
3624 BN_CTX's "bundling".
3627 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
3628 to allow all RSA operations to function using a single BN_CTX.
3631 *) Preliminary support for certificate policy evaluation and checking. This
3632 is initially intended to pass the tests outlined in "Conformance Testing
3633 of Relying Party Client Certificate Path Processing Logic" v1.07.
3636 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
3637 remained unused and not that useful. A variety of other little bignum
3638 tweaks and fixes have also been made continuing on from the audit (see
3642 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
3643 associated ASN1, EVP and SSL functions and old ASN1 macros.
3646 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
3647 and this should never fail. So the return value from the use of
3648 BN_set_word() (which can fail due to needless expansion) is now deprecated;
3649 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
3652 *) BN_CTX_get() should return zero-valued bignums, providing the same
3653 initialised value as BN_new().
projects / openssl.git / blob