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 *) Abort handshake if server key exchange message is omitted for ephemeral
665 Thanks to Karthikeyan Bhargavan for reporting this issue.
669 *) Remove non-export ephemeral RSA code on client and server. This code
670 violated the TLS standard by allowing the use of temporary RSA keys in
671 non-export ciphersuites and could be used by a server to effectively
672 downgrade the RSA key length used to a value smaller than the server
673 certificate. Thanks for Karthikeyan Bhargavan for reporting this issue.
677 *) Ensure that the session ID context of an SSL is updated when its
678 SSL_CTX is updated via SSL_set_SSL_CTX.
680 The session ID context is typically set from the parent SSL_CTX,
681 and can vary with the CTX.
684 *) Fix various certificate fingerprint issues.
686 By using non-DER or invalid encodings outside the signed portion of a
687 certificate the fingerprint can be changed without breaking the signature.
688 Although no details of the signed portion of the certificate can be changed
689 this can cause problems with some applications: e.g. those using the
690 certificate fingerprint for blacklists.
692 1. Reject signatures with non zero unused bits.
694 If the BIT STRING containing the signature has non zero unused bits reject
695 the signature. All current signature algorithms require zero unused bits.
697 2. Check certificate algorithm consistency.
699 Check the AlgorithmIdentifier inside TBS matches the one in the
700 certificate signature. NB: this will result in signature failure
701 errors for some broken certificates.
703 Thanks to Konrad Kraszewski from Google for reporting this issue.
705 3. Check DSA/ECDSA signatures use DER.
707 Reencode DSA/ECDSA signatures and compare with the original received
708 signature. Return an error if there is a mismatch.
710 This will reject various cases including garbage after signature
711 (thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
712 program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
713 (negative or with leading zeroes).
715 Further analysis was conducted and fixes were developed by Stephen Henson
716 of the OpenSSL core team.
721 *) Do not resume sessions on the server if the negotiated protocol
722 version does not match the session's version. Resuming with a different
723 version, while not strictly forbidden by the RFC, is of questionable
724 sanity and breaks all known clients.
725 [David Benjamin, Emilia Käsper]
727 *) Tighten handling of the ChangeCipherSpec (CCS) message: reject
728 early CCS messages during renegotiation. (Note that because
729 renegotiation is encrypted, this early CCS was not exploitable.)
732 *) Tighten client-side session ticket handling during renegotiation:
733 ensure that the client only accepts a session ticket if the server sends
734 the extension anew in the ServerHello. Previously, a TLS client would
735 reuse the old extension state and thus accept a session ticket if one was
736 announced in the initial ServerHello.
738 Similarly, ensure that the client requires a session ticket if one
739 was advertised in the ServerHello. Previously, a TLS client would
740 ignore a missing NewSessionTicket message.
743 Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
747 A flaw in the DTLS SRTP extension parsing code allows an attacker, who
748 sends a carefully crafted handshake message, to cause OpenSSL to fail
749 to free up to 64k of memory causing a memory leak. This could be
750 exploited in a Denial Of Service attack. This issue affects OpenSSL
751 1.0.1 server implementations for both SSL/TLS and DTLS regardless of
752 whether SRTP is used or configured. Implementations of OpenSSL that
753 have been compiled with OPENSSL_NO_SRTP defined are not affected.
755 The fix was developed by the OpenSSL team.
759 *) Session Ticket Memory Leak.
761 When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
762 integrity of that ticket is first verified. In the event of a session
763 ticket integrity check failing, OpenSSL will fail to free memory
764 causing a memory leak. By sending a large number of invalid session
765 tickets an attacker could exploit this issue in a Denial Of Service
770 *) Build option no-ssl3 is incomplete.
772 When OpenSSL is configured with "no-ssl3" as a build option, servers
773 could accept and complete a SSL 3.0 handshake, and clients could be
774 configured to send them.
776 [Akamai and the OpenSSL team]
778 *) Add support for TLS_FALLBACK_SCSV.
779 Client applications doing fallback retries should call
780 SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
782 [Adam Langley, Bodo Moeller]
784 *) Add additional DigestInfo checks.
786 Reencode DigestInto in DER and check against the original when
787 verifying RSA signature: this will reject any improperly encoded
788 DigestInfo structures.
790 Note: this is a precautionary measure and no attacks are currently known.
794 Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
796 *) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
797 SRP code can be overrun an internal buffer. Add sanity check that
798 g, A, B < N to SRP code.
800 Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
801 Group for discovering this issue.
805 *) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
806 TLS 1.0 instead of higher protocol versions when the ClientHello message
807 is badly fragmented. This allows a man-in-the-middle attacker to force a
808 downgrade to TLS 1.0 even if both the server and the client support a
809 higher protocol version, by modifying the client's TLS records.
811 Thanks to David Benjamin and Adam Langley (Google) for discovering and
812 researching this issue.
816 *) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
817 to a denial of service attack. A malicious server can crash the client
818 with a null pointer dereference (read) by specifying an anonymous (EC)DH
819 ciphersuite and sending carefully crafted handshake messages.
821 Thanks to Felix Gröbert (Google) for discovering and researching this
826 *) By sending carefully crafted DTLS packets an attacker could cause openssl
827 to leak memory. This can be exploited through a Denial of Service attack.
828 Thanks to Adam Langley for discovering and researching this issue.
832 *) An attacker can force openssl to consume large amounts of memory whilst
833 processing DTLS handshake messages. This can be exploited through a
834 Denial of Service attack.
835 Thanks to Adam Langley for discovering and researching this issue.
839 *) An attacker can force an error condition which causes openssl to crash
840 whilst processing DTLS packets due to memory being freed twice. This
841 can be exploited through a Denial of Service attack.
842 Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
847 *) If a multithreaded client connects to a malicious server using a resumed
848 session and the server sends an ec point format extension it could write
849 up to 255 bytes to freed memory.
851 Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
856 *) A malicious server can crash an OpenSSL client with a null pointer
857 dereference (read) by specifying an SRP ciphersuite even though it was not
858 properly negotiated with the client. This can be exploited through a
859 Denial of Service attack.
861 Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
862 discovering and researching this issue.
866 *) A flaw in OBJ_obj2txt may cause pretty printing functions such as
867 X509_name_oneline, X509_name_print_ex et al. to leak some information
868 from the stack. Applications may be affected if they echo pretty printing
869 output to the attacker.
871 Thanks to Ivan Fratric (Google) for discovering this issue.
873 [Emilia Käsper, and Steve Henson]
875 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
876 for corner cases. (Certain input points at infinity could lead to
877 bogus results, with non-infinity inputs mapped to infinity too.)
880 Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
882 *) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
883 handshake can force the use of weak keying material in OpenSSL
884 SSL/TLS clients and servers.
886 Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
887 researching this issue. (CVE-2014-0224)
888 [KIKUCHI Masashi, Steve Henson]
890 *) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
891 OpenSSL DTLS client the code can be made to recurse eventually crashing
894 Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
896 [Imre Rad, Steve Henson]
898 *) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
899 be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
900 client or server. This is potentially exploitable to run arbitrary
901 code on a vulnerable client or server.
903 Thanks to Jüri Aedla for reporting this issue. (CVE-2014-0195)
904 [Jüri Aedla, Steve Henson]
906 *) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
907 are subject to a denial of service attack.
909 Thanks to Felix Gröbert and Ivan Fratric at Google for discovering
910 this issue. (CVE-2014-3470)
911 [Felix Gröbert, Ivan Fratric, Steve Henson]
913 *) Harmonize version and its documentation. -f flag is used to display
915 [mancha <mancha1@zoho.com>]
917 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
919 [mancha <mancha1@zoho.com>]
921 *) Fix some double frees. These are not thought to be exploitable.
922 [mancha <mancha1@zoho.com>]
924 Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
926 *) A missing bounds check in the handling of the TLS heartbeat extension
927 can be used to reveal up to 64k of memory to a connected client or
930 Thanks for Neel Mehta of Google Security for discovering this bug and to
931 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
932 preparing the fix (CVE-2014-0160)
933 [Adam Langley, Bodo Moeller]
935 *) Fix for the attack described in the paper "Recovering OpenSSL
936 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
937 by Yuval Yarom and Naomi Benger. Details can be obtained from:
938 http://eprint.iacr.org/2014/140
940 Thanks to Yuval Yarom and Naomi Benger for discovering this
941 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
942 [Yuval Yarom and Naomi Benger]
944 *) TLS pad extension: draft-agl-tls-padding-03
946 Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
947 TLS client Hello record length value would otherwise be > 255 and
948 less that 512 pad with a dummy extension containing zeroes so it
949 is at least 512 bytes long.
951 [Adam Langley, Steve Henson]
953 Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
955 *) Fix for TLS record tampering bug. A carefully crafted invalid
956 handshake could crash OpenSSL with a NULL pointer exception.
957 Thanks to Anton Johansson for reporting this issues.
960 *) Keep original DTLS digest and encryption contexts in retransmission
961 structures so we can use the previous session parameters if they need
962 to be resent. (CVE-2013-6450)
965 *) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
966 avoids preferring ECDHE-ECDSA ciphers when the client appears to be
967 Safari on OS X. Safari on OS X 10.8..10.8.3 advertises support for
968 several ECDHE-ECDSA ciphers, but fails to negotiate them. The bug
969 is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
970 10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
971 [Rob Stradling, Adam Langley]
973 Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
975 *) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
976 supporting platforms or when small records were transferred.
977 [Andy Polyakov, Steve Henson]
979 Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
981 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
983 This addresses the flaw in CBC record processing discovered by
984 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
985 at: http://www.isg.rhul.ac.uk/tls/
987 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
988 Security Group at Royal Holloway, University of London
989 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
990 Emilia Käsper for the initial patch.
992 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
994 *) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
995 ciphersuites which can be exploited in a denial of service attack.
996 Thanks go to and to Adam Langley <agl@chromium.org> for discovering
997 and detecting this bug and to Wolfgang Ettlinger
998 <wolfgang.ettlinger@gmail.com> for independently discovering this issue.
1002 *) Return an error when checking OCSP signatures when key is NULL.
1003 This fixes a DoS attack. (CVE-2013-0166)
1006 *) Make openssl verify return errors.
1007 [Chris Palmer <palmer@google.com> and Ben Laurie]
1009 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
1010 the right response is stapled. Also change SSL_get_certificate()
1011 so it returns the certificate actually sent.
1012 See http://rt.openssl.org/Ticket/Display.html?id=2836.
1013 [Rob Stradling <rob.stradling@comodo.com>]
1015 *) Fix possible deadlock when decoding public keys.
1018 *) Don't use TLS 1.0 record version number in initial client hello
1022 Changes between 1.0.1b and 1.0.1c [10 May 2012]
1024 *) Sanity check record length before skipping explicit IV in TLS
1025 1.2, 1.1 and DTLS to fix DoS attack.
1027 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
1028 fuzzing as a service testing platform.
1032 *) Initialise tkeylen properly when encrypting CMS messages.
1033 Thanks to Solar Designer of Openwall for reporting this issue.
1036 *) In FIPS mode don't try to use composite ciphers as they are not
1040 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
1042 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
1043 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
1044 mean any application compiled against OpenSSL 1.0.0 headers setting
1045 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
1046 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
1047 0x10000000L Any application which was previously compiled against
1048 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
1049 will need to be recompiled as a result. Letting be results in
1050 inability to disable specifically TLS 1.1 and in client context,
1051 in unlike event, limit maximum offered version to TLS 1.0 [see below].
1054 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
1055 disable just protocol X, but all protocols above X *if* there are
1056 protocols *below* X still enabled. In more practical terms it means
1057 that if application wants to disable TLS1.0 in favor of TLS1.1 and
1058 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
1059 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
1063 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
1065 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
1066 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
1067 in CRYPTO_realloc_clean.
1069 Thanks to Tavis Ormandy, Google Security Team, for discovering this
1070 issue and to Adam Langley <agl@chromium.org> for fixing it.
1072 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
1074 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
1077 *) Workarounds for some broken servers that "hang" if a client hello
1078 record length exceeds 255 bytes.
1080 1. Do not use record version number > TLS 1.0 in initial client
1081 hello: some (but not all) hanging servers will now work.
1082 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
1083 the number of ciphers sent in the client hello. This should be
1084 set to an even number, such as 50, for example by passing:
1085 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
1086 Most broken servers should now work.
1087 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
1088 TLS 1.2 client support entirely.
1091 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
1094 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
1096 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
1097 STRING form instead of a DigestInfo.
1100 *) The format used for MDC2 RSA signatures is inconsistent between EVP
1101 and the RSA_sign/RSA_verify functions. This was made more apparent when
1102 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
1103 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
1104 the correct format in RSA_verify so both forms transparently work.
1107 *) Some servers which support TLS 1.0 can choke if we initially indicate
1108 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
1109 encrypted premaster secret. As a workaround use the maximum permitted
1110 client version in client hello, this should keep such servers happy
1111 and still work with previous versions of OpenSSL.
1114 *) Add support for TLS/DTLS heartbeats.
1115 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1117 *) Add support for SCTP.
1118 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1120 *) Improved PRNG seeding for VOS.
1121 [Paul Green <Paul.Green@stratus.com>]
1123 *) Extensive assembler packs updates, most notably:
1125 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
1126 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
1127 - x86_64: bit-sliced AES implementation;
1128 - ARM: NEON support, contemporary platforms optimizations;
1129 - s390x: z196 support;
1130 - *: GHASH and GF(2^m) multiplication implementations;
1134 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
1135 (removal of unnecessary code)
1136 [Peter Sylvester <peter.sylvester@edelweb.fr>]
1138 *) Add TLS key material exporter from RFC 5705.
1141 *) Add DTLS-SRTP negotiation from RFC 5764.
1144 *) Add Next Protocol Negotiation,
1145 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
1146 disabled with a no-npn flag to config or Configure. Code donated
1148 [Adam Langley <agl@google.com> and Ben Laurie]
1150 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
1151 NIST-P256, NIST-P521, with constant-time single point multiplication on
1152 typical inputs. Compiler support for the nonstandard type __uint128_t is
1153 required to use this (present in gcc 4.4 and later, for 64-bit builds).
1154 Code made available under Apache License version 2.0.
1156 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
1157 line to include this in your build of OpenSSL, and run "make depend" (or
1158 "make update"). This enables the following EC_METHODs:
1160 EC_GFp_nistp224_method()
1161 EC_GFp_nistp256_method()
1162 EC_GFp_nistp521_method()
1164 EC_GROUP_new_by_curve_name() will automatically use these (while
1165 EC_GROUP_new_curve_GFp() currently prefers the more flexible
1167 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
1169 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
1170 all platforms. Move ssize_t definition from e_os.h to the public
1171 header file e_os2.h as it now appears in public header file cms.h
1174 *) New -sigopt option to the ca, req and x509 utilities. Additional
1175 signature parameters can be passed using this option and in
1179 *) Add RSA PSS signing function. This will generate and set the
1180 appropriate AlgorithmIdentifiers for PSS based on those in the
1181 corresponding EVP_MD_CTX structure. No application support yet.
1184 *) Support for companion algorithm specific ASN1 signing routines.
1185 New function ASN1_item_sign_ctx() signs a pre-initialised
1186 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
1187 the appropriate parameters.
1190 *) Add new algorithm specific ASN1 verification initialisation function
1191 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
1192 handling will be the same no matter what EVP_PKEY_METHOD is used.
1193 Add a PSS handler to support verification of PSS signatures: checked
1194 against a number of sample certificates.
1197 *) Add signature printing for PSS. Add PSS OIDs.
1198 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
1200 *) Add algorithm specific signature printing. An individual ASN1 method
1201 can now print out signatures instead of the standard hex dump.
1203 More complex signatures (e.g. PSS) can print out more meaningful
1204 information. Include DSA version that prints out the signature
1208 *) Password based recipient info support for CMS library: implementing
1212 *) Split password based encryption into PBES2 and PBKDF2 functions. This
1213 neatly separates the code into cipher and PBE sections and is required
1214 for some algorithms that split PBES2 into separate pieces (such as
1215 password based CMS).
1218 *) Session-handling fixes:
1219 - Fix handling of connections that are resuming with a session ID,
1220 but also support Session Tickets.
1221 - Fix a bug that suppressed issuing of a new ticket if the client
1222 presented a ticket with an expired session.
1223 - Try to set the ticket lifetime hint to something reasonable.
1224 - Make tickets shorter by excluding irrelevant information.
1225 - On the client side, don't ignore renewed tickets.
1226 [Adam Langley, Bodo Moeller (Google)]
1228 *) Fix PSK session representation.
1231 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
1233 This work was sponsored by Intel.
1236 *) Add GCM support to TLS library. Some custom code is needed to split
1237 the IV between the fixed (from PRF) and explicit (from TLS record)
1238 portions. This adds all GCM ciphersuites supported by RFC5288 and
1239 RFC5289. Generalise some AES* cipherstrings to include GCM and
1240 add a special AESGCM string for GCM only.
1243 *) Expand range of ctrls for AES GCM. Permit setting invocation
1244 field on decrypt and retrieval of invocation field only on encrypt.
1247 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
1248 As required by RFC5289 these ciphersuites cannot be used if for
1249 versions of TLS earlier than 1.2.
1252 *) For FIPS capable OpenSSL interpret a NULL default public key method
1253 as unset and return the appropriate default but do *not* set the default.
1254 This means we can return the appropriate method in applications that
1255 switch between FIPS and non-FIPS modes.
1258 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
1259 ENGINE is used then we cannot handle that in the FIPS module so we
1260 keep original code iff non-FIPS operations are allowed.
1263 *) Add -attime option to openssl utilities.
1264 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
1266 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
1269 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
1270 FIPS EC methods unconditionally for now.
1273 *) New build option no-ec2m to disable characteristic 2 code.
1276 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
1277 all cases can be covered as some introduce binary incompatibilities.
1280 *) Redirect RSA operations to FIPS module including keygen,
1281 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
1284 *) Add similar low level API blocking to ciphers.
1287 *) Low level digest APIs are not approved in FIPS mode: any attempt
1288 to use these will cause a fatal error. Applications that *really* want
1289 to use them can use the private_* version instead.
1292 *) Redirect cipher operations to FIPS module for FIPS builds.
1295 *) Redirect digest operations to FIPS module for FIPS builds.
1298 *) Update build system to add "fips" flag which will link in fipscanister.o
1299 for static and shared library builds embedding a signature if needed.
1302 *) Output TLS supported curves in preference order instead of numerical
1303 order. This is currently hardcoded for the highest order curves first.
1304 This should be configurable so applications can judge speed vs strength.
1307 *) Add TLS v1.2 server support for client authentication.
1310 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
1314 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
1315 FIPS modules versions.
1318 *) Add TLS v1.2 client side support for client authentication. Keep cache
1319 of handshake records longer as we don't know the hash algorithm to use
1320 until after the certificate request message is received.
1323 *) Initial TLS v1.2 client support. Add a default signature algorithms
1324 extension including all the algorithms we support. Parse new signature
1325 format in client key exchange. Relax some ECC signing restrictions for
1326 TLS v1.2 as indicated in RFC5246.
1329 *) Add server support for TLS v1.2 signature algorithms extension. Switch
1330 to new signature format when needed using client digest preference.
1331 All server ciphersuites should now work correctly in TLS v1.2. No client
1332 support yet and no support for client certificates.
1335 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
1336 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
1337 ciphersuites. At present only RSA key exchange ciphersuites work with
1338 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
1339 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
1340 and version checking.
1343 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
1344 with this defined it will not be affected by any changes to ssl internal
1345 structures. Add several utility functions to allow openssl application
1346 to work with OPENSSL_NO_SSL_INTERN defined.
1350 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
1352 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
1355 *) Permit abbreviated handshakes when renegotiating using the function
1356 SSL_renegotiate_abbreviated().
1357 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1359 *) Add call to ENGINE_register_all_complete() to
1360 ENGINE_load_builtin_engines(), so some implementations get used
1361 automatically instead of needing explicit application support.
1364 *) Add support for TLS key exporter as described in RFC5705.
1365 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
1367 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
1368 a few changes are required:
1370 Add SSL_OP_NO_TLSv1_1 flag.
1371 Add TLSv1_1 methods.
1372 Update version checking logic to handle version 1.1.
1373 Add explicit IV handling (ported from DTLS code).
1374 Add command line options to s_client/s_server.
1377 Changes between 1.0.0j and 1.0.0k [5 Feb 2013]
1379 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
1381 This addresses the flaw in CBC record processing discovered by
1382 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
1383 at: http://www.isg.rhul.ac.uk/tls/
1385 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1386 Security Group at Royal Holloway, University of London
1387 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
1388 Emilia Käsper for the initial patch.
1390 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
1392 *) Return an error when checking OCSP signatures when key is NULL.
1393 This fixes a DoS attack. (CVE-2013-0166)
1396 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
1397 the right response is stapled. Also change SSL_get_certificate()
1398 so it returns the certificate actually sent.
1399 See http://rt.openssl.org/Ticket/Display.html?id=2836.
1400 (This is a backport)
1401 [Rob Stradling <rob.stradling@comodo.com>]
1403 *) Fix possible deadlock when decoding public keys.
1406 Changes between 1.0.0i and 1.0.0j [10 May 2012]
1408 [NB: OpenSSL 1.0.0i and later 1.0.0 patch levels were released after
1411 *) Sanity check record length before skipping explicit IV in DTLS
1414 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
1415 fuzzing as a service testing platform.
1419 *) Initialise tkeylen properly when encrypting CMS messages.
1420 Thanks to Solar Designer of Openwall for reporting this issue.
1423 Changes between 1.0.0h and 1.0.0i [19 Apr 2012]
1425 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
1426 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
1427 in CRYPTO_realloc_clean.
1429 Thanks to Tavis Ormandy, Google Security Team, for discovering this
1430 issue and to Adam Langley <agl@chromium.org> for fixing it.
1432 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
1434 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
1436 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
1437 in CMS and PKCS7 code. When RSA decryption fails use a random key for
1438 content decryption and always return the same error. Note: this attack
1439 needs on average 2^20 messages so it only affects automated senders. The
1440 old behaviour can be reenabled in the CMS code by setting the
1441 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
1442 an MMA defence is not necessary.
1443 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
1444 this issue. (CVE-2012-0884)
1447 *) Fix CVE-2011-4619: make sure we really are receiving a
1448 client hello before rejecting multiple SGC restarts. Thanks to
1449 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
1452 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
1454 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1455 Thanks to Antonio Martin, Enterprise Secure Access Research and
1456 Development, Cisco Systems, Inc. for discovering this bug and
1457 preparing a fix. (CVE-2012-0050)
1460 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
1462 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1463 of the Vaudenay padding oracle attack on CBC mode encryption
1464 which enables an efficient plaintext recovery attack against
1465 the OpenSSL implementation of DTLS. Their attack exploits timing
1466 differences arising during decryption processing. A research
1467 paper describing this attack can be found at:
1468 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1469 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1470 Security Group at Royal Holloway, University of London
1471 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1472 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1473 for preparing the fix. (CVE-2011-4108)
1474 [Robin Seggelmann, Michael Tuexen]
1476 *) Clear bytes used for block padding of SSL 3.0 records.
1478 [Adam Langley (Google)]
1480 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1481 Kadianakis <desnacked@gmail.com> for discovering this issue and
1482 Adam Langley for preparing the fix. (CVE-2011-4619)
1483 [Adam Langley (Google)]
1485 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
1486 [Andrey Kulikov <amdeich@gmail.com>]
1488 *) Prevent malformed RFC3779 data triggering an assertion failure.
1489 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1490 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1491 [Rob Austein <sra@hactrn.net>]
1493 *) Improved PRNG seeding for VOS.
1494 [Paul Green <Paul.Green@stratus.com>]
1496 *) Fix ssl_ciph.c set-up race.
1497 [Adam Langley (Google)]
1499 *) Fix spurious failures in ecdsatest.c.
1500 [Emilia Käsper (Google)]
1502 *) Fix the BIO_f_buffer() implementation (which was mixing different
1503 interpretations of the '..._len' fields).
1504 [Adam Langley (Google)]
1506 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1507 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1508 threads won't reuse the same blinding coefficients.
1510 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1511 lock to call BN_BLINDING_invert_ex, and avoids one use of
1512 BN_BLINDING_update for each BN_BLINDING structure (previously,
1513 the last update always remained unused).
1514 [Emilia Käsper (Google)]
1516 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
1517 [Bob Buckholz (Google)]
1519 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
1521 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
1522 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
1523 [Kaspar Brand <ossl@velox.ch>]
1525 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1526 for multi-threaded use of ECDH. (CVE-2011-3210)
1527 [Adam Langley (Google)]
1529 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1532 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
1533 signature public key algorithm by using OID xref utilities instead.
1534 Before this you could only use some ECC ciphersuites with SHA1 only.
1537 *) Add protection against ECDSA timing attacks as mentioned in the paper
1538 by Billy Bob Brumley and Nicola Tuveri, see:
1540 http://eprint.iacr.org/2011/232.pdf
1542 [Billy Bob Brumley and Nicola Tuveri]
1544 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
1546 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1547 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1549 *) Fix bug in string printing code: if *any* escaping is enabled we must
1550 escape the escape character (backslash) or the resulting string is
1554 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
1556 *) Disable code workaround for ancient and obsolete Netscape browsers
1557 and servers: an attacker can use it in a ciphersuite downgrade attack.
1558 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1561 *) Fixed J-PAKE implementation error, originally discovered by
1562 Sebastien Martini, further info and confirmation from Stefan
1563 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1566 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
1568 *) Fix extension code to avoid race conditions which can result in a buffer
1569 overrun vulnerability: resumed sessions must not be modified as they can
1570 be shared by multiple threads. CVE-2010-3864
1573 *) Fix WIN32 build system to correctly link an ENGINE directory into
1577 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
1579 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
1581 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
1583 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
1585 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
1586 context. The operation can be customised via the ctrl mechanism in
1587 case ENGINEs want to include additional functionality.
1590 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
1593 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
1594 output hashes compatible with older versions of OpenSSL.
1595 [Willy Weisz <weisz@vcpc.univie.ac.at>]
1597 *) Fix compression algorithm handling: if resuming a session use the
1598 compression algorithm of the resumed session instead of determining
1599 it from client hello again. Don't allow server to change algorithm.
1602 *) Add load_crls() function to apps tidying load_certs() too. Add option
1603 to verify utility to allow additional CRLs to be included.
1606 *) Update OCSP request code to permit adding custom headers to the request:
1607 some responders need this.
1610 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
1612 [Julia Lawall <julia@diku.dk>]
1614 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
1615 needlessly dereferenced structures, used obsolete functions and
1616 didn't handle all updated verify codes correctly.
1619 *) Disable MD2 in the default configuration.
1622 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
1623 indicate the initial BIO being pushed or popped. This makes it possible
1624 to determine whether the BIO is the one explicitly called or as a result
1625 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
1626 it handles reference counts correctly and doesn't zero out the I/O bio
1627 when it is not being explicitly popped. WARNING: applications which
1628 included workarounds for the old buggy behaviour will need to be modified
1629 or they could free up already freed BIOs.
1632 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
1633 renaming to all platforms (within the 0.9.8 branch, this was
1634 done conditionally on Netware platforms to avoid a name clash).
1635 [Guenter <lists@gknw.net>]
1637 *) Add ECDHE and PSK support to DTLS.
1638 [Michael Tuexen <tuexen@fh-muenster.de>]
1640 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
1644 *) Add "missing" function EVP_MD_flags() (without this the only way to
1645 retrieve a digest flags is by accessing the structure directly. Update
1646 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
1647 or cipher is registered as in the "from" argument. Print out all
1648 registered digests in the dgst usage message instead of manually
1649 attempting to work them out.
1652 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
1653 this allows the use of compression and extensions. Change default cipher
1654 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
1655 by default unless an application cipher string requests it.
1658 *) Alter match criteria in PKCS12_parse(). It used to try to use local
1659 key ids to find matching certificates and keys but some PKCS#12 files
1660 don't follow the (somewhat unwritten) rules and this strategy fails.
1661 Now just gather all certificates together and the first private key
1662 then look for the first certificate that matches the key.
1665 *) Support use of registered digest and cipher names for dgst and cipher
1666 commands instead of having to add each one as a special case. So now
1673 openssl dgst -sha256 foo
1675 and this works for ENGINE based algorithms too.
1679 *) Update Gost ENGINE to support parameter files.
1680 [Victor B. Wagner <vitus@cryptocom.ru>]
1682 *) Support GeneralizedTime in ca utility.
1683 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
1685 *) Enhance the hash format used for certificate directory links. The new
1686 form uses the canonical encoding (meaning equivalent names will work
1687 even if they aren't identical) and uses SHA1 instead of MD5. This form
1688 is incompatible with the older format and as a result c_rehash should
1689 be used to rebuild symbolic links.
1692 *) Make PKCS#8 the default write format for private keys, replacing the
1693 traditional format. This form is standardised, more secure and doesn't
1694 include an implicit MD5 dependency.
1697 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
1698 committed to OpenSSL should pass this lot as a minimum.
1701 *) Add session ticket override functionality for use by EAP-FAST.
1702 [Jouni Malinen <j@w1.fi>]
1704 *) Modify HMAC functions to return a value. Since these can be implemented
1705 in an ENGINE errors can occur.
1708 *) Type-checked OBJ_bsearch_ex.
1711 *) Type-checked OBJ_bsearch. Also some constification necessitated
1712 by type-checking. Still to come: TXT_DB, bsearch(?),
1713 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
1717 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
1718 seconds to a tm structure directly, instead of going through OS
1719 specific date routines. This avoids any issues with OS routines such
1720 as the year 2038 bug. New *_adj() functions for ASN1 time structures
1721 and X509_time_adj_ex() to cover the extended range. The existing
1722 X509_time_adj() is still usable and will no longer have any date issues.
1725 *) Delta CRL support. New use deltas option which will attempt to locate
1726 and search any appropriate delta CRLs available.
1728 This work was sponsored by Google.
1731 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
1732 code and add additional score elements. Validate alternate CRL paths
1733 as part of the CRL checking and indicate a new error "CRL path validation
1734 error" in this case. Applications wanting additional details can use
1735 the verify callback and check the new "parent" field. If this is not
1736 NULL CRL path validation is taking place. Existing applications wont
1737 see this because it requires extended CRL support which is off by
1740 This work was sponsored by Google.
1743 *) Support for freshest CRL extension.
1745 This work was sponsored by Google.
1748 *) Initial indirect CRL support. Currently only supported in the CRLs
1749 passed directly and not via lookup. Process certificate issuer
1750 CRL entry extension and lookup CRL entries by bother issuer name
1751 and serial number. Check and process CRL issuer entry in IDP extension.
1753 This work was sponsored by Google.
1756 *) Add support for distinct certificate and CRL paths. The CRL issuer
1757 certificate is validated separately in this case. Only enabled if
1758 an extended CRL support flag is set: this flag will enable additional
1759 CRL functionality in future.
1761 This work was sponsored by Google.
1764 *) Add support for policy mappings extension.
1766 This work was sponsored by Google.
1769 *) Fixes to pathlength constraint, self issued certificate handling,
1770 policy processing to align with RFC3280 and PKITS tests.
1772 This work was sponsored by Google.
1775 *) Support for name constraints certificate extension. DN, email, DNS
1776 and URI types are currently supported.
1778 This work was sponsored by Google.
1781 *) To cater for systems that provide a pointer-based thread ID rather
1782 than numeric, deprecate the current numeric thread ID mechanism and
1783 replace it with a structure and associated callback type. This
1784 mechanism allows a numeric "hash" to be extracted from a thread ID in
1785 either case, and on platforms where pointers are larger than 'long',
1786 mixing is done to help ensure the numeric 'hash' is usable even if it
1787 can't be guaranteed unique. The default mechanism is to use "&errno"
1788 as a pointer-based thread ID to distinguish between threads.
1790 Applications that want to provide their own thread IDs should now use
1791 CRYPTO_THREADID_set_callback() to register a callback that will call
1792 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
1794 Note that ERR_remove_state() is now deprecated, because it is tied
1795 to the assumption that thread IDs are numeric. ERR_remove_state(0)
1796 to free the current thread's error state should be replaced by
1797 ERR_remove_thread_state(NULL).
1799 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
1800 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
1801 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
1802 application was previously providing a numeric thread callback that
1803 was inappropriate for distinguishing threads, then uniqueness might
1804 have been obtained with &errno that happened immediately in the
1805 intermediate development versions of OpenSSL; this is no longer the
1806 case, the numeric thread callback will now override the automatic use
1808 [Geoff Thorpe, with help from Bodo Moeller]
1810 *) Initial support for different CRL issuing certificates. This covers a
1811 simple case where the self issued certificates in the chain exist and
1812 the real CRL issuer is higher in the existing chain.
1814 This work was sponsored by Google.
1817 *) Removed effectively defunct crypto/store from the build.
1820 *) Revamp of STACK to provide stronger type-checking. Still to come:
1821 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
1822 ASN1_STRING, CONF_VALUE.
1825 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
1826 RAM on SSL connections. This option can save about 34k per idle SSL.
1829 *) Revamp of LHASH to provide stronger type-checking. Still to come:
1830 STACK, TXT_DB, bsearch, qsort.
1833 *) Initial support for Cryptographic Message Syntax (aka CMS) based
1834 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
1835 support for data, signedData, compressedData, digestedData and
1836 encryptedData, envelopedData types included. Scripts to check against
1837 RFC4134 examples draft and interop and consistency checks of many
1838 content types and variants.
1841 *) Add options to enc utility to support use of zlib compression BIO.
1844 *) Extend mk1mf to support importing of options and assembly language
1845 files from Configure script, currently only included in VC-WIN32.
1846 The assembly language rules can now optionally generate the source
1847 files from the associated perl scripts.
1850 *) Implement remaining functionality needed to support GOST ciphersuites.
1851 Interop testing has been performed using CryptoPro implementations.
1852 [Victor B. Wagner <vitus@cryptocom.ru>]
1854 *) s390x assembler pack.
1857 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
1861 *) Implement Opaque PRF Input TLS extension as specified in
1862 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
1863 official specification yet and no extension type assignment by
1864 IANA exists, this extension (for now) will have to be explicitly
1865 enabled when building OpenSSL by providing the extension number
1866 to use. For example, specify an option
1868 -DTLSEXT_TYPE_opaque_prf_input=0x9527
1870 to the "config" or "Configure" script to enable the extension,
1871 assuming extension number 0x9527 (which is a completely arbitrary
1872 and unofficial assignment based on the MD5 hash of the Internet
1873 Draft). Note that by doing so, you potentially lose
1874 interoperability with other TLS implementations since these might
1875 be using the same extension number for other purposes.
1877 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
1878 opaque PRF input value to use in the handshake. This will create
1879 an interal copy of the length-'len' string at 'src', and will
1880 return non-zero for success.
1882 To get more control and flexibility, provide a callback function
1885 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
1886 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
1890 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
1893 Callback function 'cb' will be called in handshakes, and is
1894 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
1895 Argument 'arg' is for application purposes (the value as given to
1896 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
1897 be provided to the callback function). The callback function
1898 has to return non-zero to report success: usually 1 to use opaque
1899 PRF input just if possible, or 2 to enforce use of the opaque PRF
1900 input. In the latter case, the library will abort the handshake
1901 if opaque PRF input is not successfully negotiated.
1903 Arguments 'peerinput' and 'len' given to the callback function
1904 will always be NULL and 0 in the case of a client. A server will
1905 see the client's opaque PRF input through these variables if
1906 available (NULL and 0 otherwise). Note that if the server
1907 provides an opaque PRF input, the length must be the same as the
1908 length of the client's opaque PRF input.
1910 Note that the callback function will only be called when creating
1911 a new session (session resumption can resume whatever was
1912 previously negotiated), and will not be called in SSL 2.0
1913 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
1914 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
1915 for applications that need to enforce opaque PRF input.
1919 *) Update ssl code to support digests other than SHA1+MD5 for handshake
1922 [Victor B. Wagner <vitus@cryptocom.ru>]
1924 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1925 RFC4507bis. The encrypted ticket format is an encrypted encoded
1926 SSL_SESSION structure, that way new session features are automatically
1929 If a client application caches session in an SSL_SESSION structure
1930 support is transparent because tickets are now stored in the encoded
1933 The SSL_CTX structure automatically generates keys for ticket
1934 protection in servers so again support should be possible
1935 with no application modification.
1937 If a client or server wishes to disable RFC4507 support then the option
1938 SSL_OP_NO_TICKET can be set.
1940 Add a TLS extension debugging callback to allow the contents of any client
1941 or server extensions to be examined.
1943 This work was sponsored by Google.
1946 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
1947 OpenSSL should now compile cleanly on gcc 4.2
1948 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
1950 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
1951 support including streaming MAC support: this is required for GOST
1952 ciphersuite support.
1953 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
1955 *) Add option -stream to use PKCS#7 streaming in smime utility. New
1956 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
1957 to output in BER and PEM format.
1960 *) Experimental support for use of HMAC via EVP_PKEY interface. This
1961 allows HMAC to be handled via the EVP_DigestSign*() interface. The
1962 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
1963 ENGINE support for HMAC keys which are unextractable. New -mac and
1964 -macopt options to dgst utility.
1967 *) New option -sigopt to dgst utility. Update dgst to use
1968 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
1969 alternative signing paramaters such as X9.31 or PSS in the dgst
1973 *) Change ssl_cipher_apply_rule(), the internal function that does
1974 the work each time a ciphersuite string requests enabling
1975 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
1976 removing ("!foo+bar") a class of ciphersuites: Now it maintains
1977 the order of disabled ciphersuites such that those ciphersuites
1978 that most recently went from enabled to disabled not only stay
1979 in order with respect to each other, but also have higher priority
1980 than other disabled ciphersuites the next time ciphersuites are
1983 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
1984 the same ciphersuites as with "HIGH" alone, but in a specific
1985 order where the PSK ciphersuites come first (since they are the
1986 most recently disabled ciphersuites when "HIGH" is parsed).
1988 Also, change ssl_create_cipher_list() (using this new
1989 funcionality) such that between otherwise identical
1990 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
1994 *) Change ssl_create_cipher_list() so that it automatically
1995 arranges the ciphersuites in reasonable order before starting
1996 to process the rule string. Thus, the definition for "DEFAULT"
1997 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
1998 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
1999 This makes it much easier to arrive at a reasonable default order
2000 in applications for which anonymous ciphers are OK (meaning
2001 that you can't actually use DEFAULT).
2002 [Bodo Moeller; suggested by Victor Duchovni]
2004 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
2005 processing) into multiple integers instead of setting
2006 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
2007 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
2008 (These masks as well as the individual bit definitions are hidden
2009 away into the non-exported interface ssl/ssl_locl.h, so this
2010 change to the definition of the SSL_CIPHER structure shouldn't
2011 affect applications.) This give us more bits for each of these
2012 categories, so there is no longer a need to coagulate AES128 and
2013 AES256 into a single algorithm bit, and to coagulate Camellia128
2014 and Camellia256 into a single algorithm bit, which has led to all
2017 Thus, among other things, the kludge introduced in 0.9.7m and
2018 0.9.8e for masking out AES256 independently of AES128 or masking
2019 out Camellia256 independently of AES256 is not needed here in 0.9.9.
2021 With the change, we also introduce new ciphersuite aliases that
2022 so far were missing: "AES128", "AES256", "CAMELLIA128", and
2026 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
2027 Use the leftmost N bytes of the signature input if the input is
2028 larger than the prime q (with N being the size in bytes of q).
2031 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
2032 it yet and it is largely untested.
2035 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
2038 *) Initial incomplete changes to avoid need for function casts in OpenSSL
2039 some compilers (gcc 4.2 and later) reject their use. Safestack is
2040 reimplemented. Update ASN1 to avoid use of legacy functions.
2043 *) Win32/64 targets are linked with Winsock2.
2046 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
2047 to external functions. This can be used to increase CRL handling
2048 efficiency especially when CRLs are very large by (for example) storing
2049 the CRL revoked certificates in a database.
2052 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
2053 new CRLs added to a directory can be used. New command line option
2054 -verify_return_error to s_client and s_server. This causes real errors
2055 to be returned by the verify callback instead of carrying on no matter
2056 what. This reflects the way a "real world" verify callback would behave.
2059 *) GOST engine, supporting several GOST algorithms and public key formats.
2060 Kindly donated by Cryptocom.
2063 *) Partial support for Issuing Distribution Point CRL extension. CRLs
2064 partitioned by DP are handled but no indirect CRL or reason partitioning
2065 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
2066 selected via a scoring technique which handles IDP and AKID in CRLs.
2069 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
2070 will ultimately be used for all verify operations: this will remove the
2071 X509_STORE dependency on certificate verification and allow alternative
2072 lookup methods. X509_STORE based implementations of these two callbacks.
2075 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
2076 Modify get_crl() to find a valid (unexpired) CRL if possible.
2079 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
2080 this would be called X509_CRL_cmp() but that name is already used by
2081 a function that just compares CRL issuer names. Cache several CRL
2082 extensions in X509_CRL structure and cache CRLDP in X509.
2085 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
2086 this maps equivalent X509_NAME structures into a consistent structure.
2087 Name comparison can then be performed rapidly using memcmp().
2090 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
2094 *) Allow digests to supply their own micalg string for S/MIME type using
2095 the ctrl EVP_MD_CTRL_MICALG.
2098 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
2099 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
2100 ctrl. It can then customise the structure before and/or after signing
2104 *) New function OBJ_add_sigid() to allow application defined signature OIDs
2105 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
2106 to free up any added signature OIDs.
2109 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
2110 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
2111 digest and cipher tables. New options added to openssl utility:
2112 list-message-digest-algorithms and list-cipher-algorithms.
2115 *) Change the array representation of binary polynomials: the list
2116 of degrees of non-zero coefficients is now terminated with -1.
2117 Previously it was terminated with 0, which was also part of the
2118 value; thus, the array representation was not applicable to
2119 polynomials where t^0 has coefficient zero. This change makes
2120 the array representation useful in a more general context.
2123 *) Various modifications and fixes to SSL/TLS cipher string
2124 handling. For ECC, the code now distinguishes between fixed ECDH
2125 with RSA certificates on the one hand and with ECDSA certificates
2126 on the other hand, since these are separate ciphersuites. The
2127 unused code for Fortezza ciphersuites has been removed.
2129 For consistency with EDH, ephemeral ECDH is now called "EECDH"
2130 (not "ECDHE"). For consistency with the code for DH
2131 certificates, use of ECDH certificates is now considered ECDH
2132 authentication, not RSA or ECDSA authentication (the latter is
2133 merely the CA's signing algorithm and not actively used in the
2136 The temporary ciphersuite alias "ECCdraft" is no longer
2137 available, and ECC ciphersuites are no longer excluded from "ALL"
2138 and "DEFAULT". The following aliases now exist for RFC 4492
2139 ciphersuites, most of these by analogy with the DH case:
2141 kECDHr - ECDH cert, signed with RSA
2142 kECDHe - ECDH cert, signed with ECDSA
2143 kECDH - ECDH cert (signed with either RSA or ECDSA)
2144 kEECDH - ephemeral ECDH
2145 ECDH - ECDH cert or ephemeral ECDH
2151 AECDH - anonymous ECDH
2152 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
2156 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
2157 Use correct micalg parameters depending on digest(s) in signed message.
2160 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
2161 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
2164 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
2165 an engine to register a method. Add ENGINE lookups for methods and
2166 functional reference processing.
2169 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
2170 EVP_{Sign,Verify}* which allow an application to customise the signature
2174 *) New -resign option to smime utility. This adds one or more signers
2175 to an existing PKCS#7 signedData structure. Also -md option to use an
2176 alternative message digest algorithm for signing.
2179 *) Tidy up PKCS#7 routines and add new functions to make it easier to
2180 create PKCS7 structures containing multiple signers. Update smime
2181 application to support multiple signers.
2184 *) New -macalg option to pkcs12 utility to allow setting of an alternative
2188 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
2189 Reorganize PBE internals to lookup from a static table using NIDs,
2190 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
2191 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
2192 PRF which will be automatically used with PBES2.
2195 *) Replace the algorithm specific calls to generate keys in "req" with the
2199 *) Update PKCS#7 enveloped data routines to use new API. This is now
2200 supported by any public key method supporting the encrypt operation. A
2201 ctrl is added to allow the public key algorithm to examine or modify
2202 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
2206 *) Add a ctrl to asn1 method to allow a public key algorithm to express
2207 a default digest type to use. In most cases this will be SHA1 but some
2208 algorithms (such as GOST) need to specify an alternative digest. The
2209 return value indicates how strong the preference is 1 means optional and
2210 2 is mandatory (that is it is the only supported type). Modify
2211 ASN1_item_sign() to accept a NULL digest argument to indicate it should
2212 use the default md. Update openssl utilities to use the default digest
2213 type for signing if it is not explicitly indicated.
2216 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
2217 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
2218 signing method from the key type. This effectively removes the link
2219 between digests and public key types.
2222 *) Add an OID cross reference table and utility functions. Its purpose is to
2223 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
2224 rsaEncryption. This will allow some of the algorithm specific hackery
2225 needed to use the correct OID to be removed.
2228 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
2229 structures for PKCS7_sign(). They are now set up by the relevant public
2233 *) Add provisional EC pkey method with support for ECDSA and ECDH.
2236 *) Add support for key derivation (agreement) in the API, DH method and
2240 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
2241 public and private key formats. As a side effect these add additional
2242 command line functionality not previously available: DSA signatures can be
2243 generated and verified using pkeyutl and DH key support and generation in
2248 [Oliver Tappe <zooey@hirschkaefer.de>]
2250 *) New make target "install_html_docs" installs HTML renditions of the
2252 [Oliver Tappe <zooey@hirschkaefer.de>]
2254 *) New utility "genpkey" this is analogous to "genrsa" etc except it can
2255 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
2256 support key and parameter generation and add initial key generation
2257 functionality for RSA.
2260 *) Add functions for main EVP_PKEY_method operations. The undocumented
2261 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
2262 EVP_PKEY_{encrypt,decrypt}_old.
2265 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
2266 key API, doesn't do much yet.
2269 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
2270 public key algorithms. New option to openssl utility:
2271 "list-public-key-algorithms" to print out info.
2274 *) Implement the Supported Elliptic Curves Extension for
2275 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2278 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
2279 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
2282 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
2283 utilities such as rsa, dsa, dsaparam etc except they process any key
2287 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
2288 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
2289 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
2293 *) Initial support for pluggable public key ASN1.
2294 De-spaghettify the public key ASN1 handling. Move public and private
2295 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
2296 algorithm specific handling to a single module within the relevant
2297 algorithm directory. Add functions to allow (near) opaque processing
2298 of public and private key structures.
2301 *) Implement the Supported Point Formats Extension for
2302 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2305 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
2306 for the psk identity [hint] and the psk callback functions to the
2307 SSL_SESSION, SSL and SSL_CTX structure.
2310 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
2314 SSL_CTX_use_psk_identity_hint
2315 SSL_get_psk_identity_hint
2316 SSL_get_psk_identity
2317 SSL_use_psk_identity_hint
2319 [Mika Kousa and Pasi Eronen of Nokia Corporation]
2321 *) Add RFC 3161 compliant time stamp request creation, response generation
2322 and response verification functionality.
2323 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
2325 *) Add initial support for TLS extensions, specifically for the server_name
2326 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2327 have new members for a host name. The SSL data structure has an
2328 additional member SSL_CTX *initial_ctx so that new sessions can be
2329 stored in that context to allow for session resumption, even after the
2330 SSL has been switched to a new SSL_CTX in reaction to a client's
2331 server_name extension.
2333 New functions (subject to change):
2335 SSL_get_servername()
2336 SSL_get_servername_type()
2339 New CTRL codes and macros (subject to change):
2341 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2342 - SSL_CTX_set_tlsext_servername_callback()
2343 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2344 - SSL_CTX_set_tlsext_servername_arg()
2345 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2347 openssl s_client has a new '-servername ...' option.
2349 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2350 '-key2 ...', '-servername_fatal' (subject to change). This allows
2351 testing the HostName extension for a specific single host name ('-cert'
2352 and '-key' remain fallbacks for handshakes without HostName
2353 negotiation). If the unrecognized_name alert has to be sent, this by
2354 default is a warning; it becomes fatal with the '-servername_fatal'
2357 [Peter Sylvester, Remy Allais, Christophe Renou]
2359 *) Whirlpool hash implementation is added.
2362 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
2363 bn(64,32). Because of instruction set limitations it doesn't have
2364 any negative impact on performance. This was done mostly in order
2365 to make it possible to share assembler modules, such as bn_mul_mont
2366 implementations, between 32- and 64-bit builds without hassle.
2369 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
2370 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
2374 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
2375 dedicated Montgomery multiplication procedure, is introduced.
2376 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
2377 "64-bit" performance on certain 32-bit targets.
2380 *) New option SSL_OP_NO_COMP to disable use of compression selectively
2381 in SSL structures. New SSL ctrl to set maximum send fragment size.
2382 Save memory by seeting the I/O buffer sizes dynamically instead of
2383 using the maximum available value.
2386 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
2387 in addition to the text details.
2390 *) Very, very preliminary EXPERIMENTAL support for printing of general
2391 ASN1 structures. This currently produces rather ugly output and doesn't
2392 handle several customised structures at all.
2395 *) Integrated support for PVK file format and some related formats such
2396 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
2397 these in the 'rsa' and 'dsa' utilities.
2400 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
2403 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
2404 place for the (very old) "NETSCAPE" format certificates which are now
2405 handled using new ASN1 code equivalents.
2408 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
2409 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
2410 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
2413 *) Modify CRL distribution points extension code to print out previously
2414 unsupported fields. Enhance extension setting code to allow setting of
2418 *) Add print and set support for Issuing Distribution Point CRL extension.
2421 *) Change 'Configure' script to enable Camellia by default.
2424 Changes between 0.9.8x and 0.9.8y [5 Feb 2013]
2426 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
2428 This addresses the flaw in CBC record processing discovered by
2429 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
2430 at: http://www.isg.rhul.ac.uk/tls/
2432 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
2433 Security Group at Royal Holloway, University of London
2434 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
2435 Emilia Käsper for the initial patch.
2437 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
2439 *) Return an error when checking OCSP signatures when key is NULL.
2440 This fixes a DoS attack. (CVE-2013-0166)
2443 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
2444 the right response is stapled. Also change SSL_get_certificate()
2445 so it returns the certificate actually sent.
2446 See http://rt.openssl.org/Ticket/Display.html?id=2836.
2447 (This is a backport)
2448 [Rob Stradling <rob.stradling@comodo.com>]
2450 *) Fix possible deadlock when decoding public keys.
2453 Changes between 0.9.8w and 0.9.8x [10 May 2012]
2455 *) Sanity check record length before skipping explicit IV in DTLS
2458 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
2459 fuzzing as a service testing platform.
2463 *) Initialise tkeylen properly when encrypting CMS messages.
2464 Thanks to Solar Designer of Openwall for reporting this issue.
2467 Changes between 0.9.8v and 0.9.8w [23 Apr 2012]
2469 *) The fix for CVE-2012-2110 did not take into account that the
2470 'len' argument to BUF_MEM_grow and BUF_MEM_grow_clean is an
2471 int in OpenSSL 0.9.8, making it still vulnerable. Fix by
2472 rejecting negative len parameter. (CVE-2012-2131)
2473 [Tomas Hoger <thoger@redhat.com>]
2475 Changes between 0.9.8u and 0.9.8v [19 Apr 2012]
2477 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
2478 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
2479 in CRYPTO_realloc_clean.
2481 Thanks to Tavis Ormandy, Google Security Team, for discovering this
2482 issue and to Adam Langley <agl@chromium.org> for fixing it.
2484 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
2486 Changes between 0.9.8t and 0.9.8u [12 Mar 2012]
2488 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
2489 in CMS and PKCS7 code. When RSA decryption fails use a random key for
2490 content decryption and always return the same error. Note: this attack
2491 needs on average 2^20 messages so it only affects automated senders. The
2492 old behaviour can be reenabled in the CMS code by setting the
2493 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
2494 an MMA defence is not necessary.
2495 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
2496 this issue. (CVE-2012-0884)
2499 *) Fix CVE-2011-4619: make sure we really are receiving a
2500 client hello before rejecting multiple SGC restarts. Thanks to
2501 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
2504 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
2506 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
2507 Thanks to Antonio Martin, Enterprise Secure Access Research and
2508 Development, Cisco Systems, Inc. for discovering this bug and
2509 preparing a fix. (CVE-2012-0050)
2512 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
2514 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
2515 of the Vaudenay padding oracle attack on CBC mode encryption
2516 which enables an efficient plaintext recovery attack against
2517 the OpenSSL implementation of DTLS. Their attack exploits timing
2518 differences arising during decryption processing. A research
2519 paper describing this attack can be found at:
2520 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
2521 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
2522 Security Group at Royal Holloway, University of London
2523 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
2524 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
2525 for preparing the fix. (CVE-2011-4108)
2526 [Robin Seggelmann, Michael Tuexen]
2528 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
2529 [Ben Laurie, Kasper <ekasper@google.com>]
2531 *) Clear bytes used for block padding of SSL 3.0 records.
2533 [Adam Langley (Google)]
2535 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
2536 Kadianakis <desnacked@gmail.com> for discovering this issue and
2537 Adam Langley for preparing the fix. (CVE-2011-4619)
2538 [Adam Langley (Google)]
2540 *) Prevent malformed RFC3779 data triggering an assertion failure.
2541 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
2542 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
2543 [Rob Austein <sra@hactrn.net>]
2545 *) Fix ssl_ciph.c set-up race.
2546 [Adam Langley (Google)]
2548 *) Fix spurious failures in ecdsatest.c.
2549 [Emilia Käsper (Google)]
2551 *) Fix the BIO_f_buffer() implementation (which was mixing different
2552 interpretations of the '..._len' fields).
2553 [Adam Langley (Google)]
2555 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
2556 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
2557 threads won't reuse the same blinding coefficients.
2559 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
2560 lock to call BN_BLINDING_invert_ex, and avoids one use of
2561 BN_BLINDING_update for each BN_BLINDING structure (previously,
2562 the last update always remained unused).
2563 [Emilia Käsper (Google)]
2565 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
2566 for multi-threaded use of ECDH.
2567 [Adam Langley (Google)]
2569 *) Fix x509_name_ex_d2i memory leak on bad inputs.
2572 *) Add protection against ECDSA timing attacks as mentioned in the paper
2573 by Billy Bob Brumley and Nicola Tuveri, see:
2575 http://eprint.iacr.org/2011/232.pdf
2577 [Billy Bob Brumley and Nicola Tuveri]
2579 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
2581 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
2582 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
2584 *) Fix bug in string printing code: if *any* escaping is enabled we must
2585 escape the escape character (backslash) or the resulting string is
2589 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
2591 *) Disable code workaround for ancient and obsolete Netscape browsers
2592 and servers: an attacker can use it in a ciphersuite downgrade attack.
2593 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
2596 *) Fixed J-PAKE implementation error, originally discovered by
2597 Sebastien Martini, further info and confirmation from Stefan
2598 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
2601 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
2603 *) Fix extension code to avoid race conditions which can result in a buffer
2604 overrun vulnerability: resumed sessions must not be modified as they can
2605 be shared by multiple threads. CVE-2010-3864
2608 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
2611 *) Don't reencode certificate when calculating signature: cache and use
2612 the original encoding instead. This makes signature verification of
2613 some broken encodings work correctly.
2616 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
2617 is also one of the inputs.
2618 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
2620 *) Don't repeatedly append PBE algorithms to table if they already exist.
2621 Sort table on each new add. This effectively makes the table read only
2622 after all algorithms are added and subsequent calls to PKCS12_pbe_add
2626 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
2628 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
2631 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
2632 access or freeing data twice (CVE-2010-0742)
2633 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
2635 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
2636 common in certificates and some applications which only call
2637 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
2641 Reduce copying into .apps and .test in makevms.com
2642 Don't try to use blank CA certificate in CA.com
2643 Allow use of C files from original directories in maketests.com
2644 [Steven M. Schweda" <sms@antinode.info>]
2646 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
2648 *) When rejecting SSL/TLS records due to an incorrect version number, never
2649 update s->server with a new major version number. As of
2650 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
2651 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
2652 the previous behavior could result in a read attempt at NULL when
2653 receiving specific incorrect SSL/TLS records once record payload
2654 protection is active. (CVE-2010-0740)
2655 [Bodo Moeller, Adam Langley <agl@chromium.org>]
2657 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
2658 could be crashed if the relevant tables were not present (e.g. chrooted).
2659 [Tomas Hoger <thoger@redhat.com>]
2661 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
2663 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
2664 [Martin Olsson, Neel Mehta]
2666 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
2667 accommodate for stack sorting, always a write lock!).
2670 *) On some versions of WIN32 Heap32Next is very slow. This can cause
2671 excessive delays in the RAND_poll(): over a minute. As a workaround
2672 include a time check in the inner Heap32Next loop too.
2675 *) The code that handled flushing of data in SSL/TLS originally used the
2676 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
2677 the problem outlined in PR#1949. The fix suggested there however can
2678 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
2679 of Apache). So instead simplify the code to flush unconditionally.
2680 This should be fine since flushing with no data to flush is a no op.
2683 *) Handle TLS versions 2.0 and later properly and correctly use the
2684 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
2685 off ancient servers have a habit of sticking around for a while...
2688 *) Modify compression code so it frees up structures without using the
2689 ex_data callbacks. This works around a problem where some applications
2690 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
2691 restarting) then use compression (e.g. SSL with compression) later.
2692 This results in significant per-connection memory leaks and
2693 has caused some security issues including CVE-2008-1678 and
2697 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
2698 change when encrypting or decrypting.
2701 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
2702 connect and renegotiate with servers which do not support RI.
2703 Until RI is more widely deployed this option is enabled by default.
2706 *) Add "missing" ssl ctrls to clear options and mode.
2709 *) If client attempts to renegotiate and doesn't support RI respond with
2710 a no_renegotiation alert as required by RFC5746. Some renegotiating
2711 TLS clients will continue a connection gracefully when they receive
2712 the alert. Unfortunately OpenSSL mishandled this alert and would hang
2713 waiting for a server hello which it will never receive. Now we treat a
2714 received no_renegotiation alert as a fatal error. This is because
2715 applications requesting a renegotiation might well expect it to succeed
2716 and would have no code in place to handle the server denying it so the
2717 only safe thing to do is to terminate the connection.
2720 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
2721 peer supports secure renegotiation and 0 otherwise. Print out peer
2722 renegotiation support in s_client/s_server.
2725 *) Replace the highly broken and deprecated SPKAC certification method with
2726 the updated NID creation version. This should correctly handle UTF8.
2729 *) Implement RFC5746. Re-enable renegotiation but require the extension
2730 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
2731 turns out to be a bad idea. It has been replaced by
2732 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
2733 SSL_CTX_set_options(). This is really not recommended unless you
2734 know what you are doing.
2735 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
2737 *) Fixes to stateless session resumption handling. Use initial_ctx when
2738 issuing and attempting to decrypt tickets in case it has changed during
2739 servername handling. Use a non-zero length session ID when attempting
2740 stateless session resumption: this makes it possible to determine if
2741 a resumption has occurred immediately after receiving server hello
2742 (several places in OpenSSL subtly assume this) instead of later in
2746 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
2747 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
2748 fixes for a few places where the return code is not checked
2750 [Julia Lawall <julia@diku.dk>]
2752 *) Add --strict-warnings option to Configure script to include devteam
2753 warnings in other configurations.
2756 *) Add support for --libdir option and LIBDIR variable in makefiles. This
2757 makes it possible to install openssl libraries in locations which
2758 have names other than "lib", for example "/usr/lib64" which some
2760 [Steve Henson, based on patch from Jeremy Utley]
2762 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
2763 X690 8.9.12 and can produce some misleading textual output of OIDs.
2764 [Steve Henson, reported by Dan Kaminsky]
2766 *) Delete MD2 from algorithm tables. This follows the recommendation in
2767 several standards that it is not used in new applications due to
2768 several cryptographic weaknesses. For binary compatibility reasons
2769 the MD2 API is still compiled in by default.
2772 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
2776 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
2777 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
2779 [Guenter <lists@gknw.net>]
2781 *) Fix the server certificate chain building code to use X509_verify_cert(),
2782 it used to have an ad-hoc builder which was unable to cope with anything
2783 other than a simple chain.
2784 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
2786 *) Don't check self signed certificate signatures in X509_verify_cert()
2787 by default (a flag can override this): it just wastes time without
2788 adding any security. As a useful side effect self signed root CAs
2789 with non-FIPS digests are now usable in FIPS mode.
2792 *) In dtls1_process_out_of_seq_message() the check if the current message
2793 is already buffered was missing. For every new message was memory
2794 allocated, allowing an attacker to perform an denial of service attack
2795 with sending out of seq handshake messages until there is no memory
2796 left. Additionally every future messege was buffered, even if the
2797 sequence number made no sense and would be part of another handshake.
2798 So only messages with sequence numbers less than 10 in advance will be
2799 buffered. (CVE-2009-1378)
2800 [Robin Seggelmann, discovered by Daniel Mentz]
2802 *) Records are buffered if they arrive with a future epoch to be
2803 processed after finishing the corresponding handshake. There is
2804 currently no limitation to this buffer allowing an attacker to perform
2805 a DOS attack with sending records with future epochs until there is no
2806 memory left. This patch adds the pqueue_size() function to determine
2807 the size of a buffer and limits the record buffer to 100 entries.
2809 [Robin Seggelmann, discovered by Daniel Mentz]
2811 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
2812 parent structure is freed. (CVE-2009-1379)
2815 *) Handle non-blocking I/O properly in SSL_shutdown() call.
2816 [Darryl Miles <darryl-mailinglists@netbauds.net>]
2819 [Ilya O. <vrghost@gmail.com>]
2821 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
2823 *) Disable renegotiation completely - this fixes a severe security
2824 problem (CVE-2009-3555) at the cost of breaking all
2825 renegotiation. Renegotiation can be re-enabled by setting
2826 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
2827 run-time. This is really not recommended unless you know what
2831 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
2833 *) Don't set val to NULL when freeing up structures, it is freed up by
2834 underlying code. If sizeof(void *) > sizeof(long) this can result in
2835 zeroing past the valid field. (CVE-2009-0789)
2836 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
2838 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
2839 checked correctly. This would allow some invalid signed attributes to
2840 appear to verify correctly. (CVE-2009-0591)
2841 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2843 *) Reject UniversalString and BMPString types with invalid lengths. This
2844 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
2845 a legal length. (CVE-2009-0590)
2848 *) Set S/MIME signing as the default purpose rather than setting it
2849 unconditionally. This allows applications to override it at the store
2853 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2854 to handle some structures.
2857 *) Improve efficiency of mem_gets: don't search whole buffer each time
2859 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2861 *) New -hex option for openssl rand.
2864 *) Print out UTF8String and NumericString when parsing ASN1.
2867 *) Support NumericString type for name components.
2870 *) Allow CC in the environment to override the automatically chosen
2871 compiler. Note that nothing is done to ensure flags work with the
2875 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2877 *) Properly check EVP_VerifyFinal() and similar return values
2879 [Ben Laurie, Bodo Moeller, Google Security Team]
2881 *) Enable TLS extensions by default.
2884 *) Allow the CHIL engine to be loaded, whether the application is
2885 multithreaded or not. (This does not release the developer from the
2886 obligation to set up the dynamic locking callbacks.)
2887 [Sander Temme <sander@temme.net>]
2889 *) Use correct exit code if there is an error in dgst command.
2890 [Steve Henson; problem pointed out by Roland Dirlewanger]
2892 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2893 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2896 *) Add experimental JPAKE support, including demo authentication in
2897 s_client and s_server.
2900 *) Set the comparison function in v3_addr_canonize().
2901 [Rob Austein <sra@hactrn.net>]
2903 *) Add support for XMPP STARTTLS in s_client.
2904 [Philip Paeps <philip@freebsd.org>]
2906 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2907 to ensure that even with this option, only ciphersuites in the
2908 server's preference list will be accepted. (Note that the option
2909 applies only when resuming a session, so the earlier behavior was
2910 just about the algorithm choice for symmetric cryptography.)
2913 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2915 *) Fix NULL pointer dereference if a DTLS server received
2916 ChangeCipherSpec as first record (CVE-2009-1386).
2919 *) Fix a state transition in s3_srvr.c and d1_srvr.c
2920 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2923 *) The fix in 0.9.8c that supposedly got rid of unsafe
2924 double-checked locking was incomplete for RSA blinding,
2925 addressing just one layer of what turns out to have been
2926 doubly unsafe triple-checked locking.
2928 So now fix this for real by retiring the MONT_HELPER macro
2929 in crypto/rsa/rsa_eay.c.
2931 [Bodo Moeller; problem pointed out by Marius Schilder]
2933 *) Various precautionary measures:
2935 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2937 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2938 (NB: This would require knowledge of the secret session ticket key
2939 to exploit, in which case you'd be SOL either way.)
2941 - Change bn_nist.c so that it will properly handle input BIGNUMs
2942 outside the expected range.
2944 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2947 [Neel Mehta, Bodo Moeller]
2949 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2950 the load fails. Useful for distros.
2951 [Ben Laurie and the FreeBSD team]
2953 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2956 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2959 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2961 This work was sponsored by Logica.
2964 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2965 keystores. Support for SSL/TLS client authentication too.
2966 Not compiled unless enable-capieng specified to Configure.
2968 This work was sponsored by Logica.
2971 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2972 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2973 attribute creation routines such as certifcate requests and PKCS#12
2977 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2979 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2980 handshake which could lead to a cilent crash as found using the
2981 Codenomicon TLS test suite (CVE-2008-1672)
2982 [Steve Henson, Mark Cox]
2984 *) Fix double free in TLS server name extensions which could lead to
2985 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2988 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2990 Clear the error queue to ensure that error entries left from
2991 older function calls do not interfere with the correct operation.
2992 [Lutz Jaenicke, Erik de Castro Lopo]
2994 *) Remove root CA certificates of commercial CAs:
2996 The OpenSSL project does not recommend any specific CA and does not
2997 have any policy with respect to including or excluding any CA.
2998 Therefore it does not make any sense to ship an arbitrary selection
2999 of root CA certificates with the OpenSSL software.
3002 *) RSA OAEP patches to fix two separate invalid memory reads.
3003 The first one involves inputs when 'lzero' is greater than
3004 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
3005 before the beginning of from). The second one involves inputs where
3006 the 'db' section contains nothing but zeroes (there is a one-byte
3007 invalid read after the end of 'db').
3008 [Ivan Nestlerode <inestlerode@us.ibm.com>]
3010 *) Partial backport from 0.9.9-dev:
3012 Introduce bn_mul_mont (dedicated Montgomery multiplication
3013 procedure) as a candidate for BIGNUM assembler implementation.
3014 While 0.9.9-dev uses assembler for various architectures, only
3015 x86_64 is available by default here in the 0.9.8 branch, and
3016 32-bit x86 is available through a compile-time setting.
3018 To try the 32-bit x86 assembler implementation, use Configure
3019 option "enable-montasm" (which exists only for this backport).
3021 As "enable-montasm" for 32-bit x86 disclaims code stability
3022 anyway, in this constellation we activate additional code
3023 backported from 0.9.9-dev for further performance improvements,
3024 namely BN_from_montgomery_word. (To enable this otherwise,
3025 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
3027 [Andy Polyakov (backport partially by Bodo Moeller)]
3029 *) Add TLS session ticket callback. This allows an application to set
3030 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
3031 values. This is useful for key rollover for example where several key
3032 sets may exist with different names.
3035 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
3036 This was broken until now in 0.9.8 releases, such that the only way
3037 a registered ENGINE could be used (assuming it initialises
3038 successfully on the host) was to explicitly set it as the default
3039 for the relevant algorithms. This is in contradiction with 0.9.7
3040 behaviour and the documentation. With this fix, when an ENGINE is
3041 registered into a given algorithm's table of implementations, the
3042 'uptodate' flag is reset so that auto-discovery will be used next
3043 time a new context for that algorithm attempts to select an
3045 [Ian Lister (tweaked by Geoff Thorpe)]
3047 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
3048 implemention in the following ways:
3050 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
3053 Lack of BER streaming support means one pass streaming processing is
3054 only supported if data is detached: setting the streaming flag is
3055 ignored for embedded content.
3057 CMS support is disabled by default and must be explicitly enabled
3058 with the enable-cms configuration option.
3061 *) Update the GMP engine glue to do direct copies between BIGNUM and
3062 mpz_t when openssl and GMP use the same limb size. Otherwise the
3063 existing "conversion via a text string export" trick is still used.
3064 [Paul Sheer <paulsheer@gmail.com>]
3066 *) Zlib compression BIO. This is a filter BIO which compressed and
3067 uncompresses any data passed through it.
3070 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
3071 RFC3394 compatible AES key wrapping.
3074 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
3075 sets string data without copying. X509_ALGOR_set0() and
3076 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
3077 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
3078 from an X509_ATTRIBUTE structure optionally checking it occurs only
3079 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
3083 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
3084 to get the expected BN_FLG_CONSTTIME behavior.
3085 [Bodo Moeller (Google)]
3089 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
3090 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
3091 - added some more tests to do_tests.pl
3092 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
3093 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
3094 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
3095 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
3096 - various changes to netware.pl to enable gcc-cross builds on Win32
3098 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
3099 - various changes to fix missing prototype warnings
3100 - fixed x86nasm.pl to create correct asm files for NASM COFF output
3101 - added AES, WHIRLPOOL and CPUID assembler code to build files
3102 - added missing AES assembler make rules to mk1mf.pl
3103 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
3104 [Guenter Knauf <eflash@gmx.net>]
3106 *) Implement certificate status request TLS extension defined in RFC3546.
3107 A client can set the appropriate parameters and receive the encoded
3108 OCSP response via a callback. A server can query the supplied parameters
3109 and set the encoded OCSP response in the callback. Add simplified examples
3110 to s_client and s_server.
3113 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
3115 *) Fix various bugs:
3116 + Binary incompatibility of ssl_ctx_st structure
3117 + DTLS interoperation with non-compliant servers
3118 + Don't call get_session_cb() without proposed session
3119 + Fix ia64 assembler code
3120 [Andy Polyakov, Steve Henson]
3122 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
3124 *) DTLS Handshake overhaul. There were longstanding issues with
3125 OpenSSL DTLS implementation, which were making it impossible for
3126 RFC 4347 compliant client to communicate with OpenSSL server.
3127 Unfortunately just fixing these incompatibilities would "cut off"
3128 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
3129 server keeps tolerating non RFC compliant syntax. The opposite is
3130 not true, 0.9.8f client can not communicate with earlier server.
3131 This update even addresses CVE-2007-4995.
3134 *) Changes to avoid need for function casts in OpenSSL: some compilers
3135 (gcc 4.2 and later) reject their use.
3136 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
3139 *) Add RFC4507 support to OpenSSL. This includes the corrections in
3140 RFC4507bis. The encrypted ticket format is an encrypted encoded
3141 SSL_SESSION structure, that way new session features are automatically
3144 If a client application caches session in an SSL_SESSION structure
3145 support is transparent because tickets are now stored in the encoded
3148 The SSL_CTX structure automatically generates keys for ticket
3149 protection in servers so again support should be possible
3150 with no application modification.
3152 If a client or server wishes to disable RFC4507 support then the option
3153 SSL_OP_NO_TICKET can be set.
3155 Add a TLS extension debugging callback to allow the contents of any client
3156 or server extensions to be examined.
3158 This work was sponsored by Google.
3161 *) Add initial support for TLS extensions, specifically for the server_name
3162 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
3163 have new members for a host name. The SSL data structure has an
3164 additional member SSL_CTX *initial_ctx so that new sessions can be
3165 stored in that context to allow for session resumption, even after the
3166 SSL has been switched to a new SSL_CTX in reaction to a client's
3167 server_name extension.
3169 New functions (subject to change):
3171 SSL_get_servername()
3172 SSL_get_servername_type()
3175 New CTRL codes and macros (subject to change):
3177 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
3178 - SSL_CTX_set_tlsext_servername_callback()
3179 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
3180 - SSL_CTX_set_tlsext_servername_arg()
3181 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
3183 openssl s_client has a new '-servername ...' option.
3185 openssl s_server has new options '-servername_host ...', '-cert2 ...',
3186 '-key2 ...', '-servername_fatal' (subject to change). This allows
3187 testing the HostName extension for a specific single host name ('-cert'
3188 and '-key' remain fallbacks for handshakes without HostName
3189 negotiation). If the unrecognized_name alert has to be sent, this by
3190 default is a warning; it becomes fatal with the '-servername_fatal'
3193 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
3195 *) Add AES and SSE2 assembly language support to VC++ build.
3198 *) Mitigate attack on final subtraction in Montgomery reduction.
3201 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
3202 (which previously caused an internal error).
3205 *) Squeeze another 10% out of IGE mode when in != out.
3208 *) AES IGE mode speedup.
3209 [Dean Gaudet (Google)]
3211 *) Add the Korean symmetric 128-bit cipher SEED (see
3212 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
3213 add SEED ciphersuites from RFC 4162:
3215 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
3216 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
3217 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
3218 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
3220 To minimize changes between patchlevels in the OpenSSL 0.9.8
3221 series, SEED remains excluded from compilation unless OpenSSL
3222 is configured with 'enable-seed'.
3223 [KISA, Bodo Moeller]
3225 *) Mitigate branch prediction attacks, which can be practical if a
3226 single processor is shared, allowing a spy process to extract
3227 information. For detailed background information, see
3228 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
3229 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
3230 and Necessary Software Countermeasures"). The core of the change
3231 are new versions BN_div_no_branch() and
3232 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
3233 respectively, which are slower, but avoid the security-relevant
3234 conditional branches. These are automatically called by BN_div()
3235 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
3236 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
3237 remove a conditional branch.
3239 BN_FLG_CONSTTIME is the new name for the previous
3240 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
3241 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
3242 in the exponent causes BN_mod_exp_mont() to use the alternative
3243 implementation in BN_mod_exp_mont_consttime().) The old name
3244 remains as a deprecated alias.
3246 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
3247 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
3248 constant-time implementations for more than just exponentiation.
3249 Here too the old name is kept as a deprecated alias.
3251 BN_BLINDING_new() will now use BN_dup() for the modulus so that
3252 the BN_BLINDING structure gets an independent copy of the
3253 modulus. This means that the previous "BIGNUM *m" argument to
3254 BN_BLINDING_new() and to BN_BLINDING_create_param() now
3255 essentially becomes "const BIGNUM *m", although we can't actually
3256 change this in the header file before 0.9.9. It allows
3257 RSA_setup_blinding() to use BN_with_flags() on the modulus to
3258 enable BN_FLG_CONSTTIME.
3260 [Matthew D Wood (Intel Corp)]
3262 *) In the SSL/TLS server implementation, be strict about session ID
3263 context matching (which matters if an application uses a single
3264 external cache for different purposes). Previously,
3265 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
3266 set. This did ensure strict client verification, but meant that,
3267 with applications using a single external cache for quite
3268 different requirements, clients could circumvent ciphersuite
3269 restrictions for a given session ID context by starting a session
3270 in a different context.
3273 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3274 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3275 authentication-only ciphersuites.
3278 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
3279 not complete and could lead to a possible single byte overflow
3280 (CVE-2007-5135) [Ben Laurie]
3282 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
3284 *) Since AES128 and AES256 (and similarly Camellia128 and
3285 Camellia256) share a single mask bit in the logic of
3286 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3287 kludge to work properly if AES128 is available and AES256 isn't
3288 (or if Camellia128 is available and Camellia256 isn't).
3291 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
3292 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
3293 When a point or a seed is encoded in a BIT STRING, we need to
3294 prevent the removal of trailing zero bits to get the proper DER
3295 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
3296 of a NamedBitList, for which trailing 0 bits need to be removed.)
3299 *) Have SSL/TLS server implementation tolerate "mismatched" record
3300 protocol version while receiving ClientHello even if the
3301 ClientHello is fragmented. (The server can't insist on the
3302 particular protocol version it has chosen before the ServerHello
3303 message has informed the client about his choice.)
3306 *) Add RFC 3779 support.
3307 [Rob Austein for ARIN, Ben Laurie]
3309 *) Load error codes if they are not already present instead of using a
3310 static variable. This allows them to be cleanly unloaded and reloaded.
3311 Improve header file function name parsing.
3314 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
3315 or CAPABILITY handshake as required by RFCs.
3318 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
3320 *) Introduce limits to prevent malicious keys being able to
3321 cause a denial of service. (CVE-2006-2940)
3322 [Steve Henson, Bodo Moeller]
3324 *) Fix ASN.1 parsing of certain invalid structures that can result
3325 in a denial of service. (CVE-2006-2937) [Steve Henson]
3327 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3328 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3330 *) Fix SSL client code which could crash if connecting to a
3331 malicious SSLv2 server. (CVE-2006-4343)
3332 [Tavis Ormandy and Will Drewry, Google Security Team]
3334 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
3335 match only those. Before that, "AES256-SHA" would be interpreted
3336 as a pattern and match "AES128-SHA" too (since AES128-SHA got
3337 the same strength classification in 0.9.7h) as we currently only
3338 have a single AES bit in the ciphersuite description bitmap.
3339 That change, however, also applied to ciphersuite strings such as
3340 "RC4-MD5" that intentionally matched multiple ciphersuites --
3341 namely, SSL 2.0 ciphersuites in addition to the more common ones
3342 from SSL 3.0/TLS 1.0.
3344 So we change the selection algorithm again: Naming an explicit
3345 ciphersuite selects this one ciphersuite, and any other similar
3346 ciphersuite (same bitmap) from *other* protocol versions.
3347 Thus, "RC4-MD5" again will properly select both the SSL 2.0
3348 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
3350 Since SSL 2.0 does not have any ciphersuites for which the
3351 128/256 bit distinction would be relevant, this works for now.
3352 The proper fix will be to use different bits for AES128 and
3353 AES256, which would have avoided the problems from the beginning;
3354 however, bits are scarce, so we can only do this in a new release
3355 (not just a patchlevel) when we can change the SSL_CIPHER
3356 definition to split the single 'unsigned long mask' bitmap into
3357 multiple values to extend the available space.
3361 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
3363 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3364 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3366 *) Add AES IGE and biIGE modes.
3369 *) Change the Unix randomness entropy gathering to use poll() when
3370 possible instead of select(), since the latter has some
3371 undesirable limitations.
3372 [Darryl Miles via Richard Levitte and Bodo Moeller]
3374 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
3375 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
3376 cannot be implicitly activated as part of, e.g., the "AES" alias.
3377 However, please upgrade to OpenSSL 0.9.9[-dev] for
3378 non-experimental use of the ECC ciphersuites to get TLS extension
3379 support, which is required for curve and point format negotiation
3380 to avoid potential handshake problems.
3383 *) Disable rogue ciphersuites:
3385 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3386 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3387 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3389 The latter two were purportedly from
3390 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3393 Also deactivate the remaining ciphersuites from
3394 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3395 unofficial, and the ID has long expired.
3398 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3399 dual-core machines) and other potential thread-safety issues.
3402 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
3403 versions), which is now available for royalty-free use
3404 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
3405 Also, add Camellia TLS ciphersuites from RFC 4132.
3407 To minimize changes between patchlevels in the OpenSSL 0.9.8
3408 series, Camellia remains excluded from compilation unless OpenSSL
3409 is configured with 'enable-camellia'.
3412 *) Disable the padding bug check when compression is in use. The padding
3413 bug check assumes the first packet is of even length, this is not
3414 necessarily true if compresssion is enabled and can result in false
3415 positives causing handshake failure. The actual bug test is ancient
3416 code so it is hoped that implementations will either have fixed it by
3417 now or any which still have the bug do not support compression.
3420 Changes between 0.9.8a and 0.9.8b [04 May 2006]
3422 *) When applying a cipher rule check to see if string match is an explicit
3423 cipher suite and only match that one cipher suite if it is.
3426 *) Link in manifests for VC++ if needed.
3427 [Austin Ziegler <halostatue@gmail.com>]
3429 *) Update support for ECC-based TLS ciphersuites according to
3430 draft-ietf-tls-ecc-12.txt with proposed changes (but without
3431 TLS extensions, which are supported starting with the 0.9.9
3432 branch, not in the OpenSSL 0.9.8 branch).
3435 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
3436 opaque EVP_CIPHER_CTX handling.
3439 *) Fixes and enhancements to zlib compression code. We now only use
3440 "zlib1.dll" and use the default __cdecl calling convention on Win32
3441 to conform with the standards mentioned here:
3442 http://www.zlib.net/DLL_FAQ.txt
3443 Static zlib linking now works on Windows and the new --with-zlib-include
3444 --with-zlib-lib options to Configure can be used to supply the location
3445 of the headers and library. Gracefully handle case where zlib library
3449 *) Several fixes and enhancements to the OID generation code. The old code
3450 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
3451 handle numbers larger than ULONG_MAX, truncated printing and had a
3452 non standard OBJ_obj2txt() behaviour.
3455 *) Add support for building of engines under engine/ as shared libraries
3456 under VC++ build system.
3459 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
3460 Hopefully, we will not see any false combination of paths any more.
3463 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
3465 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3466 (part of SSL_OP_ALL). This option used to disable the
3467 countermeasure against man-in-the-middle protocol-version
3468 rollback in the SSL 2.0 server implementation, which is a bad
3469 idea. (CVE-2005-2969)
3471 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3472 for Information Security, National Institute of Advanced Industrial
3473 Science and Technology [AIST], Japan)]
3475 *) Add two function to clear and return the verify parameter flags.
3478 *) Keep cipherlists sorted in the source instead of sorting them at
3479 runtime, thus removing the need for a lock.
3482 *) Avoid some small subgroup attacks in Diffie-Hellman.
3483 [Nick Mathewson and Ben Laurie]
3485 *) Add functions for well-known primes.
3488 *) Extended Windows CE support.
3489 [Satoshi Nakamura and Andy Polyakov]
3491 *) Initialize SSL_METHOD structures at compile time instead of during
3492 runtime, thus removing the need for a lock.
3495 *) Make PKCS7_decrypt() work even if no certificate is supplied by
3496 attempting to decrypt each encrypted key in turn. Add support to
3500 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
3502 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
3505 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
3508 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
3509 key into the same file any more.
3512 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
3515 *) Add -utf8 command line and config file option to 'ca'.
3516 [Stefan <stf@udoma.org]
3518 *) Removed the macro des_crypt(), as it seems to conflict with some
3519 libraries. Use DES_crypt().
3522 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
3523 involves renaming the source and generated shared-libs for
3524 both. The engines will accept the corrected or legacy ids
3525 ('ncipher' and '4758_cca' respectively) when binding. NB,
3526 this only applies when building 'shared'.
3527 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
3529 *) Add attribute functions to EVP_PKEY structure. Modify
3530 PKCS12_create() to recognize a CSP name attribute and
3531 use it. Make -CSP option work again in pkcs12 utility.
3534 *) Add new functionality to the bn blinding code:
3535 - automatic re-creation of the BN_BLINDING parameters after
3536 a fixed number of uses (currently 32)
3537 - add new function for parameter creation
3538 - introduce flags to control the update behaviour of the
3539 BN_BLINDING parameters
3540 - hide BN_BLINDING structure
3541 Add a second BN_BLINDING slot to the RSA structure to improve
3542 performance when a single RSA object is shared among several
3546 *) Add support for DTLS.
3547 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
3549 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
3550 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
3553 *) Remove buggy and incomplete DH cert support from
3554 ssl/ssl_rsa.c and ssl/s3_both.c
3557 *) Use SHA-1 instead of MD5 as the default digest algorithm for
3558 the apps/openssl applications.
3561 *) Compile clean with "-Wall -Wmissing-prototypes
3562 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
3563 DEBUG_SAFESTACK must also be set.
3566 *) Change ./Configure so that certain algorithms can be disabled by default.
3567 The new counterpiece to "no-xxx" is "enable-xxx".
3569 The patented RC5 and MDC2 algorithms will now be disabled unless
3570 "enable-rc5" and "enable-mdc2", respectively, are specified.
3572 (IDEA remains enabled despite being patented. This is because IDEA
3573 is frequently required for interoperability, and there is no license
3574 fee for non-commercial use. As before, "no-idea" can be used to
3575 avoid this algorithm.)
3579 *) Add processing of proxy certificates (see RFC 3820). This work was
3580 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
3581 EGEE (Enabling Grids for E-science in Europe).
3584 *) RC4 performance overhaul on modern architectures/implementations, such
3585 as Intel P4, IA-64 and AMD64.
3588 *) New utility extract-section.pl. This can be used specify an alternative
3589 section number in a pod file instead of having to treat each file as
3590 a separate case in Makefile. This can be done by adding two lines to the
3593 =for comment openssl_section:XXX
3595 The blank line is mandatory.
3599 *) New arguments -certform, -keyform and -pass for s_client and s_server
3600 to allow alternative format key and certificate files and passphrase
3604 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
3605 update associated structures and add various utility functions.
3607 Add new policy related verify parameters, include policy checking in
3608 standard verify code. Enhance 'smime' application with extra parameters
3609 to support policy checking and print out.
3612 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
3613 Nehemiah processors. These extensions support AES encryption in hardware
3614 as well as RNG (though RNG support is currently disabled).
3615 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
3617 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
3620 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
3621 [Andy Polyakov and a number of other people]
3623 *) Improved PowerPC platform support. Most notably BIGNUM assembler
3624 implementation contributed by IBM.
3625 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
3627 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
3628 exponent rather than 'unsigned long'. There is a corresponding change to
3629 the new 'rsa_keygen' element of the RSA_METHOD structure.
3630 [Jelte Jansen, Geoff Thorpe]
3632 *) Functionality for creating the initial serial number file is now
3633 moved from CA.pl to the 'ca' utility with a new option -create_serial.
3635 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
3636 number file to 1, which is bound to cause problems. To avoid
3637 the problems while respecting compatibility between different 0.9.7
3638 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
3639 CA.pl for serial number initialization. With the new release 0.9.8,
3640 we can fix the problem directly in the 'ca' utility.)
3643 *) Reduced header interdepencies by declaring more opaque objects in
3644 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
3645 give fewer recursive includes, which could break lazy source code - so
3646 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
3647 developers should define this symbol when building and using openssl to
3648 ensure they track the recommended behaviour, interfaces, [etc], but
3649 backwards-compatible behaviour prevails when this isn't defined.
3652 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
3655 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
3656 This will generate a random key of the appropriate length based on the
projects / openssl.git / blob