5 Changes between 1.0.2 and 1.1.0 [xx XXX xxxx]
7 *) Added HTTP GET support to the ocsp command.
10 *) RAND_pseudo_bytes has been deprecated. Users should use RAND bytes instead.
12 *) Added support for TLS extended master secret from
13 draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an
14 initial patch which was a great help during development.
17 *) All libssl internal structures have been removed from the public header
18 files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is
19 now redundant). Users should not attempt to access internal structures
20 directly. Instead they should use the provided API functions.
23 *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used.
24 Access to deprecated functions can be re-enabled by running config with
25 "enable-deprecated". In addition applications wishing to use deprecated
26 functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour
27 will, by default, disable some transitive includes that previously existed
28 in the header files (e.g. ec.h will no longer, by default, include bn.h)
31 *) Added support for OCB mode. OpenSSL has been granted a patent license
32 compatible with the OpenSSL license for use of OCB. Details are available
33 at https://www.openssl.org/docs/misc/OCB-patent-grant-OpenSSL.pdf. Support
34 for OCB can be removed by calling config with no-ocb.
37 *) SSLv2 support has been removed. It still supports receiving a SSLv2
38 compatible client hello.
41 *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz],
42 done while fixing the error code for the key-too-small case.
43 [Annie Yousar <a.yousar@informatik.hu-berlin.de>]
45 *) CA.sh has been removmed; use CA.pl instead.
48 *) Removed old DES API.
51 *) Remove various unsupported platforms:
57 Sinix/ReliantUNIX RM400
62 16-bit platforms such as WIN16
65 *) Clean up OPENSSL_NO_xxx #define's
66 Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF
67 Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx
68 OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC
69 OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160
70 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO
71 Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY
72 OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP
73 OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK
74 OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY
75 Remove MS_STATIC; it's a relic from platforms <32 bits.
78 *) Cleaned up dead code
79 Remove all but one '#ifdef undef' which is to be looked at.
82 *) Clean up calling of xxx_free routines.
83 Just like free(), fix most of the xxx_free routines to accept
84 NULL. Remove the non-null checks from callers. Save much code.
87 *) Experimental support for a new, fast, unbiased prime candidate generator,
88 bn_probable_prime_dh_coprime(). Not currently used by any prime generator.
89 [Felix Laurie von Massenbach <felix@erbridge.co.uk>]
91 *) New output format NSS in the sess_id command line tool. This allows
92 exporting the session id and the master key in NSS keylog format.
93 [Martin Kaiser <martin@kaiser.cx>]
95 *) Harmonize version and its documentation. -f flag is used to display
97 [mancha <mancha1@zoho.com>]
99 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
101 [mancha <mancha1@zoho.com>]
103 *) Fix some double frees. These are not thought to be exploitable.
104 [mancha <mancha1@zoho.com>]
106 *) A missing bounds check in the handling of the TLS heartbeat extension
107 can be used to reveal up to 64k of memory to a connected client or
110 Thanks for Neel Mehta of Google Security for discovering this bug and to
111 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
112 preparing the fix (CVE-2014-0160)
113 [Adam Langley, Bodo Moeller]
115 *) Fix for the attack described in the paper "Recovering OpenSSL
116 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
117 by Yuval Yarom and Naomi Benger. Details can be obtained from:
118 http://eprint.iacr.org/2014/140
120 Thanks to Yuval Yarom and Naomi Benger for discovering this
121 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
122 [Yuval Yarom and Naomi Benger]
124 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
125 this fixes a limitation in previous versions of OpenSSL.
128 *) Experimental encrypt-then-mac support.
130 Experimental support for encrypt then mac from
131 draft-gutmann-tls-encrypt-then-mac-02.txt
133 To enable it set the appropriate extension number (0x42 for the test
134 server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42
136 For non-compliant peers (i.e. just about everything) this should have no
139 WARNING: EXPERIMENTAL, SUBJECT TO CHANGE.
143 *) Add EVP support for key wrapping algorithms, to avoid problems with
144 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
145 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
146 algorithms and include tests cases.
149 *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for
153 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
154 MGF1 digest and OAEP label.
157 *) Make openssl verify return errors.
158 [Chris Palmer <palmer@google.com> and Ben Laurie]
160 *) New function ASN1_TIME_diff to calculate the difference between two
161 ASN1_TIME structures or one structure and the current time.
164 *) Update fips_test_suite to support multiple command line options. New
165 test to induce all self test errors in sequence and check expected
169 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
170 sign or verify all in one operation.
173 *) Add fips_algvs: a multicall fips utility incorporating all the algorithm
174 test programs and fips_test_suite. Includes functionality to parse
175 the minimal script output of fipsalgest.pl directly.
178 *) Add authorisation parameter to FIPS_module_mode_set().
181 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
184 *) Use separate DRBG fields for internal and external flags. New function
185 FIPS_drbg_health_check() to perform on demand health checking. Add
186 generation tests to fips_test_suite with reduced health check interval to
187 demonstrate periodic health checking. Add "nodh" option to
188 fips_test_suite to skip very slow DH test.
191 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
195 *) More extensive health check for DRBG checking many more failure modes.
196 New function FIPS_selftest_drbg_all() to handle every possible DRBG
197 combination: call this in fips_test_suite.
200 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
201 and POST to handle Dual EC cases.
204 *) Add support for canonical generation of DSA parameter 'g'. See
207 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
208 POST to handle HMAC cases.
211 *) Add functions FIPS_module_version() and FIPS_module_version_text()
212 to return numerical and string versions of the FIPS module number.
215 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
216 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented
217 outside the validated module in the FIPS capable OpenSSL.
220 *) Minor change to DRBG entropy callback semantics. In some cases
221 there is no multiple of the block length between min_len and
222 max_len. Allow the callback to return more than max_len bytes
223 of entropy but discard any extra: it is the callback's responsibility
224 to ensure that the extra data discarded does not impact the
225 requested amount of entropy.
228 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
229 information in FIPS186-3, SP800-57 and SP800-131A.
232 *) CCM support via EVP. Interface is very similar to GCM case except we
233 must supply all data in one chunk (i.e. no update, final) and the
234 message length must be supplied if AAD is used. Add algorithm test
238 *) Initial version of POST overhaul. Add POST callback to allow the status
239 of POST to be monitored and/or failures induced. Modify fips_test_suite
240 to use callback. Always run all selftests even if one fails.
243 *) XTS support including algorithm test driver in the fips_gcmtest program.
244 Note: this does increase the maximum key length from 32 to 64 bytes but
245 there should be no binary compatibility issues as existing applications
246 will never use XTS mode.
249 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
250 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
251 performs algorithm blocking for unapproved PRNG types. Also do not
252 set PRNG type in FIPS_mode_set(): leave this to the application.
253 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
254 the standard OpenSSL PRNG: set additional data to a date time vector.
257 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
258 This shouldn't present any incompatibility problems because applications
259 shouldn't be using these directly and any that are will need to rethink
260 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
263 *) Extensive self tests and health checking required by SP800-90 DRBG.
264 Remove strength parameter from FIPS_drbg_instantiate and always
265 instantiate at maximum supported strength.
268 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
271 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
274 *) New function DH_compute_key_padded() to compute a DH key and pad with
275 leading zeroes if needed: this complies with SP800-56A et al.
278 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
279 anything, incomplete, subject to change and largely untested at present.
282 *) Modify fipscanisteronly build option to only build the necessary object
283 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
286 *) Add experimental option FIPSSYMS to give all symbols in
287 fipscanister.o and FIPS or fips prefix. This will avoid
288 conflicts with future versions of OpenSSL. Add perl script
289 util/fipsas.pl to preprocess assembly language source files
290 and rename any affected symbols.
293 *) Add selftest checks and algorithm block of non-fips algorithms in
294 FIPS mode. Remove DES2 from selftests.
297 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
298 return internal method without any ENGINE dependencies. Add new
299 tiny fips sign and verify functions.
302 *) New build option no-ec2m to disable characteristic 2 code.
305 *) New build option "fipscanisteronly". This only builds fipscanister.o
306 and (currently) associated fips utilities. Uses the file Makefile.fips
307 instead of Makefile.org as the prototype.
310 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
311 Update fips_gcmtest to use IV generator.
314 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
315 setting output buffer to NULL. The *Final function must be
316 called although it will not retrieve any additional data. The tag
317 can be set or retrieved with a ctrl. The IV length is by default 12
318 bytes (96 bits) but can be set to an alternative value. If the IV
319 length exceeds the maximum IV length (currently 16 bytes) it cannot be
323 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
324 underlying do_cipher function handles all cipher semantics itself
325 including padding and finalisation. This is useful if (for example)
326 an ENGINE cipher handles block padding itself. The behaviour of
327 do_cipher is subtly changed if this flag is set: the return value
328 is the number of characters written to the output buffer (zero is
329 no longer an error code) or a negative error code. Also if the
330 input buffer is NULL and length 0 finalisation should be performed.
333 *) If a candidate issuer certificate is already part of the constructed
334 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
337 *) Improve forward-security support: add functions
339 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
340 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
342 for use by SSL/TLS servers; the callback function will be called whenever a
343 new session is created, and gets to decide whether the session may be
344 cached to make it resumable (return 0) or not (return 1). (As by the
345 SSL/TLS protocol specifications, the session_id sent by the server will be
346 empty to indicate that the session is not resumable; also, the server will
347 not generate RFC 4507 (RFC 5077) session tickets.)
349 A simple reasonable callback implementation is to return is_forward_secure.
350 This parameter will be set to 1 or 0 depending on the ciphersuite selected
351 by the SSL/TLS server library, indicating whether it can provide forward
353 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
355 *) New -verify_name option in command line utilities to set verification
359 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
360 Add CMAC pkey methods.
363 *) Experimental renegotiation in s_server -www mode. If the client
364 browses /reneg connection is renegotiated. If /renegcert it is
365 renegotiated requesting a certificate.
368 *) Add an "external" session cache for debugging purposes to s_server. This
369 should help trace issues which normally are only apparent in deployed
370 multi-process servers.
373 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
374 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
375 BIO_set_cipher() and some obscure PEM functions were changed so they
376 can now return an error. The RAND changes required a change to the
377 RAND_METHOD structure.
380 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
381 a gcc attribute to warn if the result of a function is ignored. This
382 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
383 whose return value is often ignored.
386 Changes between 1.0.2 and 1.0.2a [xx XXX xxxx]
388 *) ClientHello sigalgs DoS fix
390 If a client connects to an OpenSSL 1.0.2 server and renegotiates with an
391 invalid signature algorithms extension a NULL pointer dereference will
392 occur. This can be exploited in a DoS attack against the server.
394 This issue was was reported to OpenSSL by David Ramos of Stanford
397 [Stephen Henson and Matt Caswell]
399 *) Multiblock corrupted pointer fix
401 OpenSSL 1.0.2 introduced the "multiblock" performance improvement. This
402 feature only applies on 64 bit x86 architecture platforms that support AES
403 NI instructions. A defect in the implementation of "multiblock" can cause
404 OpenSSL's internal write buffer to become incorrectly set to NULL when
405 using non-blocking IO. Typically, when the user application is using a
406 socket BIO for writing, this will only result in a failed connection.
407 However if some other BIO is used then it is likely that a segmentation
408 fault will be triggered, thus enabling a potential DoS attack.
410 This issue was reported to OpenSSL by Daniel Danner and Rainer Mueller.
414 *) Segmentation fault in DTLSv1_listen fix
416 The DTLSv1_listen function is intended to be stateless and processes the
417 initial ClientHello from many peers. It is common for user code to loop
418 over the call to DTLSv1_listen until a valid ClientHello is received with
419 an associated cookie. A defect in the implementation of DTLSv1_listen means
420 that state is preserved in the SSL object from one invocation to the next
421 that can lead to a segmentation fault. Errors processing the initial
422 ClientHello can trigger this scenario. An example of such an error could be
423 that a DTLS1.0 only client is attempting to connect to a DTLS1.2 only
426 This issue was reported to OpenSSL by Per Allansson.
430 *) Segmentation fault in ASN1_TYPE_cmp fix
432 The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is
433 made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check
434 certificate signature algorithm consistency this can be used to crash any
435 certificate verification operation and exploited in a DoS attack. Any
436 application which performs certificate verification is vulnerable including
437 OpenSSL clients and servers which enable client authentication.
441 *) Segmentation fault for invalid PSS parameters fix
443 The signature verification routines will crash with a NULL pointer
444 dereference if presented with an ASN.1 signature using the RSA PSS
445 algorithm and invalid parameters. Since these routines are used to verify
446 certificate signature algorithms this can be used to crash any
447 certificate verification operation and exploited in a DoS attack. Any
448 application which performs certificate verification is vulnerable including
449 OpenSSL clients and servers which enable client authentication.
451 This issue was was reported to OpenSSL by Brian Carpenter.
455 *) ASN.1 structure reuse memory corruption fix
457 Reusing a structure in ASN.1 parsing may allow an attacker to cause
458 memory corruption via an invalid write. Such reuse is and has been
459 strongly discouraged and is believed to be rare.
461 Applications that parse structures containing CHOICE or ANY DEFINED BY
462 components may be affected. Certificate parsing (d2i_X509 and related
463 functions) are however not affected. OpenSSL clients and servers are
468 *) PKCS7 NULL pointer dereferences fix
470 The PKCS#7 parsing code does not handle missing outer ContentInfo
471 correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with
472 missing content and trigger a NULL pointer dereference on parsing.
474 Applications that verify PKCS#7 signatures, decrypt PKCS#7 data or
475 otherwise parse PKCS#7 structures from untrusted sources are
476 affected. OpenSSL clients and servers are not affected.
478 This issue was reported to OpenSSL by Michal Zalewski (Google).
482 *) DoS via reachable assert in SSLv2 servers fix
484 A malicious client can trigger an OPENSSL_assert (i.e., an abort) in
485 servers that both support SSLv2 and enable export cipher suites by sending
486 a specially crafted SSLv2 CLIENT-MASTER-KEY message.
488 This issue was discovered by Sean Burford (Google) and Emilia Käsper
489 (OpenSSL development team).
493 *) Empty CKE with client auth and DHE fix
495 If client auth is used then a server can seg fault in the event of a DHE
496 ciphersuite being selected and a zero length ClientKeyExchange message
497 being sent by the client. This could be exploited in a DoS attack.
501 *) Handshake with unseeded PRNG fix
503 Under certain conditions an OpenSSL 1.0.2 client can complete a handshake
504 with an unseeded PRNG. The conditions are:
505 - The client is on a platform where the PRNG has not been seeded
506 automatically, and the user has not seeded manually
507 - A protocol specific client method version has been used (i.e. not
508 SSL_client_methodv23)
509 - A ciphersuite is used that does not require additional random data from
510 the PRNG beyond the initial ClientHello client random (e.g. PSK-RC4-SHA).
512 If the handshake succeeds then the client random that has been used will
513 have been generated from a PRNG with insufficient entropy and therefore the
514 output may be predictable.
516 For example using the following command with an unseeded openssl will
517 succeed on an unpatched platform:
519 openssl s_client -psk 1a2b3c4d -tls1_2 -cipher PSK-RC4-SHA
523 *) Use After Free following d2i_ECPrivatekey error fix
525 A malformed EC private key file consumed via the d2i_ECPrivateKey function
526 could cause a use after free condition. This, in turn, could cause a double
527 free in several private key parsing functions (such as d2i_PrivateKey
528 or EVP_PKCS82PKEY) and could lead to a DoS attack or memory corruption
529 for applications that receive EC private keys from untrusted
530 sources. This scenario is considered rare.
532 This issue was discovered by the BoringSSL project and fixed in their
537 *) X509_to_X509_REQ NULL pointer deref fix
539 The function X509_to_X509_REQ will crash with a NULL pointer dereference if
540 the certificate key is invalid. This function is rarely used in practice.
542 This issue was discovered by Brian Carpenter.
546 *) Removed the export ciphers from the DEFAULT ciphers
549 Changes between 1.0.1l and 1.0.2 [22 Jan 2015]
551 *) Facilitate "universal" ARM builds targeting range of ARM ISAs, e.g.
552 ARMv5 through ARMv8, as opposite to "locking" it to single one.
553 So far those who have to target multiple plaforms would compromise
554 and argue that binary targeting say ARMv5 would still execute on
555 ARMv8. "Universal" build resolves this compromise by providing
556 near-optimal performance even on newer platforms.
559 *) Accelerated NIST P-256 elliptic curve implementation for x86_64
560 (other platforms pending).
561 [Shay Gueron & Vlad Krasnov (Intel Corp), Andy Polyakov]
563 *) Add support for the SignedCertificateTimestampList certificate and
564 OCSP response extensions from RFC6962.
567 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
568 for corner cases. (Certain input points at infinity could lead to
569 bogus results, with non-infinity inputs mapped to infinity too.)
572 *) Initial support for PowerISA 2.0.7, first implemented in POWER8.
573 This covers AES, SHA256/512 and GHASH. "Initial" means that most
574 common cases are optimized and there still is room for further
575 improvements. Vector Permutation AES for Altivec is also added.
578 *) Add support for little-endian ppc64 Linux target.
579 [Marcelo Cerri (IBM)]
581 *) Initial support for AMRv8 ISA crypto extensions. This covers AES,
582 SHA1, SHA256 and GHASH. "Initial" means that most common cases
583 are optimized and there still is room for further improvements.
584 Both 32- and 64-bit modes are supported.
585 [Andy Polyakov, Ard Biesheuvel (Linaro)]
587 *) Improved ARMv7 NEON support.
590 *) Support for SPARC Architecture 2011 crypto extensions, first
591 implemented in SPARC T4. This covers AES, DES, Camellia, SHA1,
592 SHA256/512, MD5, GHASH and modular exponentiation.
593 [Andy Polyakov, David Miller]
595 *) Accelerated modular exponentiation for Intel processors, a.k.a.
597 [Shay Gueron & Vlad Krasnov (Intel Corp)]
599 *) Support for new and upcoming Intel processors, including AVX2,
600 BMI and SHA ISA extensions. This includes additional "stitched"
601 implementations, AESNI-SHA256 and GCM, and multi-buffer support
604 This work was sponsored by Intel Corp.
607 *) Support for DTLS 1.2. This adds two sets of DTLS methods: DTLS_*_method()
608 supports both DTLS 1.2 and 1.0 and should use whatever version the peer
609 supports and DTLSv1_2_*_method() which supports DTLS 1.2 only.
612 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
613 this fixes a limiation in previous versions of OpenSSL.
616 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
617 MGF1 digest and OAEP label.
620 *) Add EVP support for key wrapping algorithms, to avoid problems with
621 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
622 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
623 algorithms and include tests cases.
626 *) Add functions to allocate and set the fields of an ECDSA_METHOD
628 [Douglas E. Engert, Steve Henson]
630 *) New functions OPENSSL_gmtime_diff and ASN1_TIME_diff to find the
631 difference in days and seconds between two tm or ASN1_TIME structures.
634 *) Add -rev test option to s_server to just reverse order of characters
635 received by client and send back to server. Also prints an abbreviated
636 summary of the connection parameters.
639 *) New option -brief for s_client and s_server to print out a brief summary
640 of connection parameters.
643 *) Add callbacks for arbitrary TLS extensions.
644 [Trevor Perrin <trevp@trevp.net> and Ben Laurie]
646 *) New option -crl_download in several openssl utilities to download CRLs
647 from CRLDP extension in certificates.
650 *) New options -CRL and -CRLform for s_client and s_server for CRLs.
653 *) New function X509_CRL_diff to generate a delta CRL from the difference
654 of two full CRLs. Add support to "crl" utility.
657 *) New functions to set lookup_crls function and to retrieve
658 X509_STORE from X509_STORE_CTX.
661 *) Print out deprecated issuer and subject unique ID fields in
665 *) Extend OCSP I/O functions so they can be used for simple general purpose
666 HTTP as well as OCSP. New wrapper function which can be used to download
667 CRLs using the OCSP API.
670 *) Delegate command line handling in s_client/s_server to SSL_CONF APIs.
673 *) SSL_CONF* functions. These provide a common framework for application
674 configuration using configuration files or command lines.
677 *) SSL/TLS tracing code. This parses out SSL/TLS records using the
678 message callback and prints the results. Needs compile time option
679 "enable-ssl-trace". New options to s_client and s_server to enable
683 *) New ctrl and macro to retrieve supported points extensions.
684 Print out extension in s_server and s_client.
687 *) New functions to retrieve certificate signature and signature
691 *) Add functions to retrieve and manipulate the raw cipherlist sent by a
695 *) New Suite B modes for TLS code. These use and enforce the requirements
696 of RFC6460: restrict ciphersuites, only permit Suite B algorithms and
697 only use Suite B curves. The Suite B modes can be set by using the
698 strings "SUITEB128", "SUITEB192" or "SUITEB128ONLY" for the cipherstring.
701 *) New chain verification flags for Suite B levels of security. Check
702 algorithms are acceptable when flags are set in X509_verify_cert.
705 *) Make tls1_check_chain return a set of flags indicating checks passed
706 by a certificate chain. Add additional tests to handle client
707 certificates: checks for matching certificate type and issuer name
711 *) If an attempt is made to use a signature algorithm not in the peer
712 preference list abort the handshake. If client has no suitable
713 signature algorithms in response to a certificate request do not
717 *) If server EC tmp key is not in client preference list abort handshake.
720 *) Add support for certificate stores in CERT structure. This makes it
721 possible to have different stores per SSL structure or one store in
722 the parent SSL_CTX. Include distint stores for certificate chain
723 verification and chain building. New ctrl SSL_CTRL_BUILD_CERT_CHAIN
724 to build and store a certificate chain in CERT structure: returing
725 an error if the chain cannot be built: this will allow applications
726 to test if a chain is correctly configured.
728 Note: if the CERT based stores are not set then the parent SSL_CTX
729 store is used to retain compatibility with existing behaviour.
733 *) New function ssl_set_client_disabled to set a ciphersuite disabled
734 mask based on the current session, check mask when sending client
735 hello and checking the requested ciphersuite.
738 *) New ctrls to retrieve and set certificate types in a certificate
739 request message. Print out received values in s_client. If certificate
740 types is not set with custom values set sensible values based on
741 supported signature algorithms.
744 *) Support for distinct client and server supported signature algorithms.
747 *) Add certificate callback. If set this is called whenever a certificate
748 is required by client or server. An application can decide which
749 certificate chain to present based on arbitrary criteria: for example
750 supported signature algorithms. Add very simple example to s_server.
751 This fixes many of the problems and restrictions of the existing client
752 certificate callback: for example you can now clear an existing
753 certificate and specify the whole chain.
756 *) Add new "valid_flags" field to CERT_PKEY structure which determines what
757 the certificate can be used for (if anything). Set valid_flags field
758 in new tls1_check_chain function. Simplify ssl_set_cert_masks which used
759 to have similar checks in it.
761 Add new "cert_flags" field to CERT structure and include a "strict mode".
762 This enforces some TLS certificate requirements (such as only permitting
763 certificate signature algorithms contained in the supported algorithms
764 extension) which some implementations ignore: this option should be used
765 with caution as it could cause interoperability issues.
768 *) Update and tidy signature algorithm extension processing. Work out
769 shared signature algorithms based on preferences and peer algorithms
770 and print them out in s_client and s_server. Abort handshake if no
771 shared signature algorithms.
774 *) Add new functions to allow customised supported signature algorithms
775 for SSL and SSL_CTX structures. Add options to s_client and s_server
779 *) New function SSL_certs_clear() to delete all references to certificates
780 from an SSL structure. Before this once a certificate had been added
781 it couldn't be removed.
784 *) Integrate hostname, email address and IP address checking with certificate
785 verification. New verify options supporting checking in opensl utility.
788 *) Fixes and wildcard matching support to hostname and email checking
789 functions. Add manual page.
790 [Florian Weimer (Red Hat Product Security Team)]
792 *) New functions to check a hostname email or IP address against a
793 certificate. Add options x509 utility to print results of checks against
797 *) Fix OCSP checking.
798 [Rob Stradling <rob.stradling@comodo.com> and Ben Laurie]
800 *) Initial experimental support for explicitly trusted non-root CAs.
801 OpenSSL still tries to build a complete chain to a root but if an
802 intermediate CA has a trust setting included that is used. The first
803 setting is used: whether to trust (e.g., -addtrust option to the x509
807 *) Add -trusted_first option which attempts to find certificates in the
808 trusted store even if an untrusted chain is also supplied.
811 *) MIPS assembly pack updates: support for MIPS32r2 and SmartMIPS ASE,
812 platform support for Linux and Android.
815 *) Support for linux-x32, ILP32 environment in x86_64 framework.
818 *) Experimental multi-implementation support for FIPS capable OpenSSL.
819 When in FIPS mode the approved implementations are used as normal,
820 when not in FIPS mode the internal unapproved versions are used instead.
821 This means that the FIPS capable OpenSSL isn't forced to use the
822 (often lower performance) FIPS implementations outside FIPS mode.
825 *) Transparently support X9.42 DH parameters when calling
826 PEM_read_bio_DHparameters. This means existing applications can handle
827 the new parameter format automatically.
830 *) Initial experimental support for X9.42 DH parameter format: mainly
831 to support use of 'q' parameter for RFC5114 parameters.
834 *) Add DH parameters from RFC5114 including test data to dhtest.
837 *) Support for automatic EC temporary key parameter selection. If enabled
838 the most preferred EC parameters are automatically used instead of
839 hardcoded fixed parameters. Now a server just has to call:
840 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
841 support ECDH and use the most appropriate parameters.
844 *) Enhance and tidy EC curve and point format TLS extension code. Use
845 static structures instead of allocation if default values are used.
846 New ctrls to set curves we wish to support and to retrieve shared curves.
847 Print out shared curves in s_server. New options to s_server and s_client
848 to set list of supported curves.
851 *) New ctrls to retrieve supported signature algorithms and
852 supported curve values as an array of NIDs. Extend openssl utility
853 to print out received values.
856 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
857 between NIDs and the more common NIST names such as "P-256". Enhance
858 ecparam utility and ECC method to recognise the NIST names for curves.
861 *) Enhance SSL/TLS certificate chain handling to support different
862 chains for each certificate instead of one chain in the parent SSL_CTX.
865 *) Support for fixed DH ciphersuite client authentication: where both
866 server and client use DH certificates with common parameters.
869 *) Support for fixed DH ciphersuites: those requiring DH server
873 *) New function i2d_re_X509_tbs for re-encoding the TBS portion of
875 Note: Related 1.0.2-beta specific macros X509_get_cert_info,
876 X509_CINF_set_modified, X509_CINF_get_issuer, X509_CINF_get_extensions and
877 X509_CINF_get_signature were reverted post internal team review.
879 Changes between 1.0.1k and 1.0.1l [15 Jan 2015]
881 *) Build fixes for the Windows and OpenVMS platforms
882 [Matt Caswell and Richard Levitte]
884 Changes between 1.0.1j and 1.0.1k [8 Jan 2015]
886 *) Fix DTLS segmentation fault in dtls1_get_record. A carefully crafted DTLS
887 message can cause a segmentation fault in OpenSSL due to a NULL pointer
888 dereference. This could lead to a Denial Of Service attack. Thanks to
889 Markus Stenberg of Cisco Systems, Inc. for reporting this issue.
893 *) Fix DTLS memory leak in dtls1_buffer_record. A memory leak can occur in the
894 dtls1_buffer_record function under certain conditions. In particular this
895 could occur if an attacker sent repeated DTLS records with the same
896 sequence number but for the next epoch. The memory leak could be exploited
897 by an attacker in a Denial of Service attack through memory exhaustion.
898 Thanks to Chris Mueller for reporting this issue.
902 *) Fix issue where no-ssl3 configuration sets method to NULL. When openssl is
903 built with the no-ssl3 option and a SSL v3 ClientHello is received the ssl
904 method would be set to NULL which could later result in a NULL pointer
905 dereference. Thanks to Frank Schmirler for reporting this issue.
909 *) Abort handshake if server key exchange message is omitted for ephemeral
912 Thanks to Karthikeyan Bhargavan of the PROSECCO team at INRIA for
913 reporting this issue.
917 *) Remove non-export ephemeral RSA code on client and server. This code
918 violated the TLS standard by allowing the use of temporary RSA keys in
919 non-export ciphersuites and could be used by a server to effectively
920 downgrade the RSA key length used to a value smaller than the server
921 certificate. Thanks for Karthikeyan Bhargavan of the PROSECCO team at
922 INRIA or reporting this issue.
926 *) Fixed issue where DH client certificates are accepted without verification.
927 An OpenSSL server will accept a DH certificate for client authentication
928 without the certificate verify message. This effectively allows a client to
929 authenticate without the use of a private key. This only affects servers
930 which trust a client certificate authority which issues certificates
931 containing DH keys: these are extremely rare and hardly ever encountered.
932 Thanks for Karthikeyan Bhargavan of the PROSECCO team at INRIA or reporting
937 *) Ensure that the session ID context of an SSL is updated when its
938 SSL_CTX is updated via SSL_set_SSL_CTX.
940 The session ID context is typically set from the parent SSL_CTX,
941 and can vary with the CTX.
944 *) Fix various certificate fingerprint issues.
946 By using non-DER or invalid encodings outside the signed portion of a
947 certificate the fingerprint can be changed without breaking the signature.
948 Although no details of the signed portion of the certificate can be changed
949 this can cause problems with some applications: e.g. those using the
950 certificate fingerprint for blacklists.
952 1. Reject signatures with non zero unused bits.
954 If the BIT STRING containing the signature has non zero unused bits reject
955 the signature. All current signature algorithms require zero unused bits.
957 2. Check certificate algorithm consistency.
959 Check the AlgorithmIdentifier inside TBS matches the one in the
960 certificate signature. NB: this will result in signature failure
961 errors for some broken certificates.
963 Thanks to Konrad Kraszewski from Google for reporting this issue.
965 3. Check DSA/ECDSA signatures use DER.
967 Reencode DSA/ECDSA signatures and compare with the original received
968 signature. Return an error if there is a mismatch.
970 This will reject various cases including garbage after signature
971 (thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
972 program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
973 (negative or with leading zeroes).
975 Further analysis was conducted and fixes were developed by Stephen Henson
976 of the OpenSSL core team.
981 *) Correct Bignum squaring. Bignum squaring (BN_sqr) may produce incorrect
982 results on some platforms, including x86_64. This bug occurs at random
983 with a very low probability, and is not known to be exploitable in any
984 way, though its exact impact is difficult to determine. Thanks to Pieter
985 Wuille (Blockstream) who reported this issue and also suggested an initial
986 fix. Further analysis was conducted by the OpenSSL development team and
987 Adam Langley of Google. The final fix was developed by Andy Polyakov of
988 the OpenSSL core team.
992 *) Do not resume sessions on the server if the negotiated protocol
993 version does not match the session's version. Resuming with a different
994 version, while not strictly forbidden by the RFC, is of questionable
995 sanity and breaks all known clients.
996 [David Benjamin, Emilia Käsper]
998 *) Tighten handling of the ChangeCipherSpec (CCS) message: reject
999 early CCS messages during renegotiation. (Note that because
1000 renegotiation is encrypted, this early CCS was not exploitable.)
1003 *) Tighten client-side session ticket handling during renegotiation:
1004 ensure that the client only accepts a session ticket if the server sends
1005 the extension anew in the ServerHello. Previously, a TLS client would
1006 reuse the old extension state and thus accept a session ticket if one was
1007 announced in the initial ServerHello.
1009 Similarly, ensure that the client requires a session ticket if one
1010 was advertised in the ServerHello. Previously, a TLS client would
1011 ignore a missing NewSessionTicket message.
1014 Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
1016 *) SRTP Memory Leak.
1018 A flaw in the DTLS SRTP extension parsing code allows an attacker, who
1019 sends a carefully crafted handshake message, to cause OpenSSL to fail
1020 to free up to 64k of memory causing a memory leak. This could be
1021 exploited in a Denial Of Service attack. This issue affects OpenSSL
1022 1.0.1 server implementations for both SSL/TLS and DTLS regardless of
1023 whether SRTP is used or configured. Implementations of OpenSSL that
1024 have been compiled with OPENSSL_NO_SRTP defined are not affected.
1026 The fix was developed by the OpenSSL team.
1030 *) Session Ticket Memory Leak.
1032 When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
1033 integrity of that ticket is first verified. In the event of a session
1034 ticket integrity check failing, OpenSSL will fail to free memory
1035 causing a memory leak. By sending a large number of invalid session
1036 tickets an attacker could exploit this issue in a Denial Of Service
1041 *) Build option no-ssl3 is incomplete.
1043 When OpenSSL is configured with "no-ssl3" as a build option, servers
1044 could accept and complete a SSL 3.0 handshake, and clients could be
1045 configured to send them.
1047 [Akamai and the OpenSSL team]
1049 *) Add support for TLS_FALLBACK_SCSV.
1050 Client applications doing fallback retries should call
1051 SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
1053 [Adam Langley, Bodo Moeller]
1055 *) Add additional DigestInfo checks.
1057 Reencode DigestInto in DER and check against the original when
1058 verifying RSA signature: this will reject any improperly encoded
1059 DigestInfo structures.
1061 Note: this is a precautionary measure and no attacks are currently known.
1065 Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
1067 *) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
1068 SRP code can be overrun an internal buffer. Add sanity check that
1069 g, A, B < N to SRP code.
1071 Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
1072 Group for discovering this issue.
1076 *) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
1077 TLS 1.0 instead of higher protocol versions when the ClientHello message
1078 is badly fragmented. This allows a man-in-the-middle attacker to force a
1079 downgrade to TLS 1.0 even if both the server and the client support a
1080 higher protocol version, by modifying the client's TLS records.
1082 Thanks to David Benjamin and Adam Langley (Google) for discovering and
1083 researching this issue.
1087 *) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
1088 to a denial of service attack. A malicious server can crash the client
1089 with a null pointer dereference (read) by specifying an anonymous (EC)DH
1090 ciphersuite and sending carefully crafted handshake messages.
1092 Thanks to Felix Gröbert (Google) for discovering and researching this
1097 *) By sending carefully crafted DTLS packets an attacker could cause openssl
1098 to leak memory. This can be exploited through a Denial of Service attack.
1099 Thanks to Adam Langley for discovering and researching this issue.
1103 *) An attacker can force openssl to consume large amounts of memory whilst
1104 processing DTLS handshake messages. This can be exploited through a
1105 Denial of Service attack.
1106 Thanks to Adam Langley for discovering and researching this issue.
1110 *) An attacker can force an error condition which causes openssl to crash
1111 whilst processing DTLS packets due to memory being freed twice. This
1112 can be exploited through a Denial of Service attack.
1113 Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
1118 *) If a multithreaded client connects to a malicious server using a resumed
1119 session and the server sends an ec point format extension it could write
1120 up to 255 bytes to freed memory.
1122 Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
1127 *) A malicious server can crash an OpenSSL client with a null pointer
1128 dereference (read) by specifying an SRP ciphersuite even though it was not
1129 properly negotiated with the client. This can be exploited through a
1130 Denial of Service attack.
1132 Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
1133 discovering and researching this issue.
1137 *) A flaw in OBJ_obj2txt may cause pretty printing functions such as
1138 X509_name_oneline, X509_name_print_ex et al. to leak some information
1139 from the stack. Applications may be affected if they echo pretty printing
1140 output to the attacker.
1142 Thanks to Ivan Fratric (Google) for discovering this issue.
1144 [Emilia Käsper, and Steve Henson]
1146 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
1147 for corner cases. (Certain input points at infinity could lead to
1148 bogus results, with non-infinity inputs mapped to infinity too.)
1151 Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
1153 *) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
1154 handshake can force the use of weak keying material in OpenSSL
1155 SSL/TLS clients and servers.
1157 Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
1158 researching this issue. (CVE-2014-0224)
1159 [KIKUCHI Masashi, Steve Henson]
1161 *) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
1162 OpenSSL DTLS client the code can be made to recurse eventually crashing
1165 Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
1167 [Imre Rad, Steve Henson]
1169 *) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
1170 be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
1171 client or server. This is potentially exploitable to run arbitrary
1172 code on a vulnerable client or server.
1174 Thanks to Jüri Aedla for reporting this issue. (CVE-2014-0195)
1175 [Jüri Aedla, Steve Henson]
1177 *) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
1178 are subject to a denial of service attack.
1180 Thanks to Felix Gröbert and Ivan Fratric at Google for discovering
1181 this issue. (CVE-2014-3470)
1182 [Felix Gröbert, Ivan Fratric, Steve Henson]
1184 *) Harmonize version and its documentation. -f flag is used to display
1186 [mancha <mancha1@zoho.com>]
1188 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
1189 in i2d_ECPrivateKey.
1190 [mancha <mancha1@zoho.com>]
1192 *) Fix some double frees. These are not thought to be exploitable.
1193 [mancha <mancha1@zoho.com>]
1195 Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
1197 *) A missing bounds check in the handling of the TLS heartbeat extension
1198 can be used to reveal up to 64k of memory to a connected client or
1201 Thanks for Neel Mehta of Google Security for discovering this bug and to
1202 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
1203 preparing the fix (CVE-2014-0160)
1204 [Adam Langley, Bodo Moeller]
1206 *) Fix for the attack described in the paper "Recovering OpenSSL
1207 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
1208 by Yuval Yarom and Naomi Benger. Details can be obtained from:
1209 http://eprint.iacr.org/2014/140
1211 Thanks to Yuval Yarom and Naomi Benger for discovering this
1212 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
1213 [Yuval Yarom and Naomi Benger]
1215 *) TLS pad extension: draft-agl-tls-padding-03
1217 Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
1218 TLS client Hello record length value would otherwise be > 255 and
1219 less that 512 pad with a dummy extension containing zeroes so it
1220 is at least 512 bytes long.
1222 [Adam Langley, Steve Henson]
1224 Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
1226 *) Fix for TLS record tampering bug. A carefully crafted invalid
1227 handshake could crash OpenSSL with a NULL pointer exception.
1228 Thanks to Anton Johansson for reporting this issues.
1231 *) Keep original DTLS digest and encryption contexts in retransmission
1232 structures so we can use the previous session parameters if they need
1233 to be resent. (CVE-2013-6450)
1236 *) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
1237 avoids preferring ECDHE-ECDSA ciphers when the client appears to be
1238 Safari on OS X. Safari on OS X 10.8..10.8.3 advertises support for
1239 several ECDHE-ECDSA ciphers, but fails to negotiate them. The bug
1240 is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
1241 10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
1242 [Rob Stradling, Adam Langley]
1244 Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
1246 *) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
1247 supporting platforms or when small records were transferred.
1248 [Andy Polyakov, Steve Henson]
1250 Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
1252 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
1254 This addresses the flaw in CBC record processing discovered by
1255 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
1256 at: http://www.isg.rhul.ac.uk/tls/
1258 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1259 Security Group at Royal Holloway, University of London
1260 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
1261 Emilia Käsper for the initial patch.
1263 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
1265 *) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
1266 ciphersuites which can be exploited in a denial of service attack.
1267 Thanks go to and to Adam Langley <agl@chromium.org> for discovering
1268 and detecting this bug and to Wolfgang Ettlinger
1269 <wolfgang.ettlinger@gmail.com> for independently discovering this issue.
1273 *) Return an error when checking OCSP signatures when key is NULL.
1274 This fixes a DoS attack. (CVE-2013-0166)
1277 *) Make openssl verify return errors.
1278 [Chris Palmer <palmer@google.com> and Ben Laurie]
1280 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
1281 the right response is stapled. Also change SSL_get_certificate()
1282 so it returns the certificate actually sent.
1283 See http://rt.openssl.org/Ticket/Display.html?id=2836.
1284 [Rob Stradling <rob.stradling@comodo.com>]
1286 *) Fix possible deadlock when decoding public keys.
1289 *) Don't use TLS 1.0 record version number in initial client hello
1293 Changes between 1.0.1b and 1.0.1c [10 May 2012]
1295 *) Sanity check record length before skipping explicit IV in TLS
1296 1.2, 1.1 and DTLS to fix DoS attack.
1298 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
1299 fuzzing as a service testing platform.
1303 *) Initialise tkeylen properly when encrypting CMS messages.
1304 Thanks to Solar Designer of Openwall for reporting this issue.
1307 *) In FIPS mode don't try to use composite ciphers as they are not
1311 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
1313 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
1314 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
1315 mean any application compiled against OpenSSL 1.0.0 headers setting
1316 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
1317 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
1318 0x10000000L Any application which was previously compiled against
1319 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
1320 will need to be recompiled as a result. Letting be results in
1321 inability to disable specifically TLS 1.1 and in client context,
1322 in unlike event, limit maximum offered version to TLS 1.0 [see below].
1325 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
1326 disable just protocol X, but all protocols above X *if* there are
1327 protocols *below* X still enabled. In more practical terms it means
1328 that if application wants to disable TLS1.0 in favor of TLS1.1 and
1329 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
1330 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
1334 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
1336 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
1337 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
1338 in CRYPTO_realloc_clean.
1340 Thanks to Tavis Ormandy, Google Security Team, for discovering this
1341 issue and to Adam Langley <agl@chromium.org> for fixing it.
1343 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
1345 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
1348 *) Workarounds for some broken servers that "hang" if a client hello
1349 record length exceeds 255 bytes.
1351 1. Do not use record version number > TLS 1.0 in initial client
1352 hello: some (but not all) hanging servers will now work.
1353 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
1354 the number of ciphers sent in the client hello. This should be
1355 set to an even number, such as 50, for example by passing:
1356 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
1357 Most broken servers should now work.
1358 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
1359 TLS 1.2 client support entirely.
1362 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
1365 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
1367 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
1368 STRING form instead of a DigestInfo.
1371 *) The format used for MDC2 RSA signatures is inconsistent between EVP
1372 and the RSA_sign/RSA_verify functions. This was made more apparent when
1373 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
1374 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
1375 the correct format in RSA_verify so both forms transparently work.
1378 *) Some servers which support TLS 1.0 can choke if we initially indicate
1379 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
1380 encrypted premaster secret. As a workaround use the maximum permitted
1381 client version in client hello, this should keep such servers happy
1382 and still work with previous versions of OpenSSL.
1385 *) Add support for TLS/DTLS heartbeats.
1386 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1388 *) Add support for SCTP.
1389 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1391 *) Improved PRNG seeding for VOS.
1392 [Paul Green <Paul.Green@stratus.com>]
1394 *) Extensive assembler packs updates, most notably:
1396 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
1397 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
1398 - x86_64: bit-sliced AES implementation;
1399 - ARM: NEON support, contemporary platforms optimizations;
1400 - s390x: z196 support;
1401 - *: GHASH and GF(2^m) multiplication implementations;
1405 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
1406 (removal of unnecessary code)
1407 [Peter Sylvester <peter.sylvester@edelweb.fr>]
1409 *) Add TLS key material exporter from RFC 5705.
1412 *) Add DTLS-SRTP negotiation from RFC 5764.
1415 *) Add Next Protocol Negotiation,
1416 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
1417 disabled with a no-npn flag to config or Configure. Code donated
1419 [Adam Langley <agl@google.com> and Ben Laurie]
1421 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
1422 NIST-P256, NIST-P521, with constant-time single point multiplication on
1423 typical inputs. Compiler support for the nonstandard type __uint128_t is
1424 required to use this (present in gcc 4.4 and later, for 64-bit builds).
1425 Code made available under Apache License version 2.0.
1427 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
1428 line to include this in your build of OpenSSL, and run "make depend" (or
1429 "make update"). This enables the following EC_METHODs:
1431 EC_GFp_nistp224_method()
1432 EC_GFp_nistp256_method()
1433 EC_GFp_nistp521_method()
1435 EC_GROUP_new_by_curve_name() will automatically use these (while
1436 EC_GROUP_new_curve_GFp() currently prefers the more flexible
1438 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
1440 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
1441 all platforms. Move ssize_t definition from e_os.h to the public
1442 header file e_os2.h as it now appears in public header file cms.h
1445 *) New -sigopt option to the ca, req and x509 utilities. Additional
1446 signature parameters can be passed using this option and in
1450 *) Add RSA PSS signing function. This will generate and set the
1451 appropriate AlgorithmIdentifiers for PSS based on those in the
1452 corresponding EVP_MD_CTX structure. No application support yet.
1455 *) Support for companion algorithm specific ASN1 signing routines.
1456 New function ASN1_item_sign_ctx() signs a pre-initialised
1457 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
1458 the appropriate parameters.
1461 *) Add new algorithm specific ASN1 verification initialisation function
1462 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
1463 handling will be the same no matter what EVP_PKEY_METHOD is used.
1464 Add a PSS handler to support verification of PSS signatures: checked
1465 against a number of sample certificates.
1468 *) Add signature printing for PSS. Add PSS OIDs.
1469 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
1471 *) Add algorithm specific signature printing. An individual ASN1 method
1472 can now print out signatures instead of the standard hex dump.
1474 More complex signatures (e.g. PSS) can print out more meaningful
1475 information. Include DSA version that prints out the signature
1479 *) Password based recipient info support for CMS library: implementing
1483 *) Split password based encryption into PBES2 and PBKDF2 functions. This
1484 neatly separates the code into cipher and PBE sections and is required
1485 for some algorithms that split PBES2 into separate pieces (such as
1486 password based CMS).
1489 *) Session-handling fixes:
1490 - Fix handling of connections that are resuming with a session ID,
1491 but also support Session Tickets.
1492 - Fix a bug that suppressed issuing of a new ticket if the client
1493 presented a ticket with an expired session.
1494 - Try to set the ticket lifetime hint to something reasonable.
1495 - Make tickets shorter by excluding irrelevant information.
1496 - On the client side, don't ignore renewed tickets.
1497 [Adam Langley, Bodo Moeller (Google)]
1499 *) Fix PSK session representation.
1502 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
1504 This work was sponsored by Intel.
1507 *) Add GCM support to TLS library. Some custom code is needed to split
1508 the IV between the fixed (from PRF) and explicit (from TLS record)
1509 portions. This adds all GCM ciphersuites supported by RFC5288 and
1510 RFC5289. Generalise some AES* cipherstrings to include GCM and
1511 add a special AESGCM string for GCM only.
1514 *) Expand range of ctrls for AES GCM. Permit setting invocation
1515 field on decrypt and retrieval of invocation field only on encrypt.
1518 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
1519 As required by RFC5289 these ciphersuites cannot be used if for
1520 versions of TLS earlier than 1.2.
1523 *) For FIPS capable OpenSSL interpret a NULL default public key method
1524 as unset and return the appropriate default but do *not* set the default.
1525 This means we can return the appropriate method in applications that
1526 switch between FIPS and non-FIPS modes.
1529 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
1530 ENGINE is used then we cannot handle that in the FIPS module so we
1531 keep original code iff non-FIPS operations are allowed.
1534 *) Add -attime option to openssl utilities.
1535 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
1537 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
1540 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
1541 FIPS EC methods unconditionally for now.
1544 *) New build option no-ec2m to disable characteristic 2 code.
1547 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
1548 all cases can be covered as some introduce binary incompatibilities.
1551 *) Redirect RSA operations to FIPS module including keygen,
1552 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
1555 *) Add similar low level API blocking to ciphers.
1558 *) Low level digest APIs are not approved in FIPS mode: any attempt
1559 to use these will cause a fatal error. Applications that *really* want
1560 to use them can use the private_* version instead.
1563 *) Redirect cipher operations to FIPS module for FIPS builds.
1566 *) Redirect digest operations to FIPS module for FIPS builds.
1569 *) Update build system to add "fips" flag which will link in fipscanister.o
1570 for static and shared library builds embedding a signature if needed.
1573 *) Output TLS supported curves in preference order instead of numerical
1574 order. This is currently hardcoded for the highest order curves first.
1575 This should be configurable so applications can judge speed vs strength.
1578 *) Add TLS v1.2 server support for client authentication.
1581 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
1585 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
1586 FIPS modules versions.
1589 *) Add TLS v1.2 client side support for client authentication. Keep cache
1590 of handshake records longer as we don't know the hash algorithm to use
1591 until after the certificate request message is received.
1594 *) Initial TLS v1.2 client support. Add a default signature algorithms
1595 extension including all the algorithms we support. Parse new signature
1596 format in client key exchange. Relax some ECC signing restrictions for
1597 TLS v1.2 as indicated in RFC5246.
1600 *) Add server support for TLS v1.2 signature algorithms extension. Switch
1601 to new signature format when needed using client digest preference.
1602 All server ciphersuites should now work correctly in TLS v1.2. No client
1603 support yet and no support for client certificates.
1606 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
1607 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
1608 ciphersuites. At present only RSA key exchange ciphersuites work with
1609 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
1610 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
1611 and version checking.
1614 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
1615 with this defined it will not be affected by any changes to ssl internal
1616 structures. Add several utility functions to allow openssl application
1617 to work with OPENSSL_NO_SSL_INTERN defined.
1621 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
1623 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
1626 *) Permit abbreviated handshakes when renegotiating using the function
1627 SSL_renegotiate_abbreviated().
1628 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1630 *) Add call to ENGINE_register_all_complete() to
1631 ENGINE_load_builtin_engines(), so some implementations get used
1632 automatically instead of needing explicit application support.
1635 *) Add support for TLS key exporter as described in RFC5705.
1636 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
1638 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
1639 a few changes are required:
1641 Add SSL_OP_NO_TLSv1_1 flag.
1642 Add TLSv1_1 methods.
1643 Update version checking logic to handle version 1.1.
1644 Add explicit IV handling (ported from DTLS code).
1645 Add command line options to s_client/s_server.
1648 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
1650 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
1651 in CMS and PKCS7 code. When RSA decryption fails use a random key for
1652 content decryption and always return the same error. Note: this attack
1653 needs on average 2^20 messages so it only affects automated senders. The
1654 old behaviour can be reenabled in the CMS code by setting the
1655 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
1656 an MMA defence is not necessary.
1657 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
1658 this issue. (CVE-2012-0884)
1661 *) Fix CVE-2011-4619: make sure we really are receiving a
1662 client hello before rejecting multiple SGC restarts. Thanks to
1663 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
1666 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
1668 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1669 Thanks to Antonio Martin, Enterprise Secure Access Research and
1670 Development, Cisco Systems, Inc. for discovering this bug and
1671 preparing a fix. (CVE-2012-0050)
1674 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
1676 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1677 of the Vaudenay padding oracle attack on CBC mode encryption
1678 which enables an efficient plaintext recovery attack against
1679 the OpenSSL implementation of DTLS. Their attack exploits timing
1680 differences arising during decryption processing. A research
1681 paper describing this attack can be found at:
1682 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1683 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1684 Security Group at Royal Holloway, University of London
1685 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1686 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1687 for preparing the fix. (CVE-2011-4108)
1688 [Robin Seggelmann, Michael Tuexen]
1690 *) Clear bytes used for block padding of SSL 3.0 records.
1692 [Adam Langley (Google)]
1694 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1695 Kadianakis <desnacked@gmail.com> for discovering this issue and
1696 Adam Langley for preparing the fix. (CVE-2011-4619)
1697 [Adam Langley (Google)]
1699 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
1700 [Andrey Kulikov <amdeich@gmail.com>]
1702 *) Prevent malformed RFC3779 data triggering an assertion failure.
1703 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1704 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1705 [Rob Austein <sra@hactrn.net>]
1707 *) Improved PRNG seeding for VOS.
1708 [Paul Green <Paul.Green@stratus.com>]
1710 *) Fix ssl_ciph.c set-up race.
1711 [Adam Langley (Google)]
1713 *) Fix spurious failures in ecdsatest.c.
1714 [Emilia Käsper (Google)]
1716 *) Fix the BIO_f_buffer() implementation (which was mixing different
1717 interpretations of the '..._len' fields).
1718 [Adam Langley (Google)]
1720 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1721 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1722 threads won't reuse the same blinding coefficients.
1724 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1725 lock to call BN_BLINDING_invert_ex, and avoids one use of
1726 BN_BLINDING_update for each BN_BLINDING structure (previously,
1727 the last update always remained unused).
1728 [Emilia Käsper (Google)]
1730 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
1731 [Bob Buckholz (Google)]
1733 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
1735 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
1736 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
1737 [Kaspar Brand <ossl@velox.ch>]
1739 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1740 for multi-threaded use of ECDH. (CVE-2011-3210)
1741 [Adam Langley (Google)]
1743 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1746 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
1747 signature public key algorithm by using OID xref utilities instead.
1748 Before this you could only use some ECC ciphersuites with SHA1 only.
1751 *) Add protection against ECDSA timing attacks as mentioned in the paper
1752 by Billy Bob Brumley and Nicola Tuveri, see:
1754 http://eprint.iacr.org/2011/232.pdf
1756 [Billy Bob Brumley and Nicola Tuveri]
1758 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
1760 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1761 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1763 *) Fix bug in string printing code: if *any* escaping is enabled we must
1764 escape the escape character (backslash) or the resulting string is
1768 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
1770 *) Disable code workaround for ancient and obsolete Netscape browsers
1771 and servers: an attacker can use it in a ciphersuite downgrade attack.
1772 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1775 *) Fixed J-PAKE implementation error, originally discovered by
1776 Sebastien Martini, further info and confirmation from Stefan
1777 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1780 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
1782 *) Fix extension code to avoid race conditions which can result in a buffer
1783 overrun vulnerability: resumed sessions must not be modified as they can
1784 be shared by multiple threads. CVE-2010-3864
1787 *) Fix WIN32 build system to correctly link an ENGINE directory into
1791 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
1793 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
1795 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
1797 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
1799 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
1800 context. The operation can be customised via the ctrl mechanism in
1801 case ENGINEs want to include additional functionality.
1804 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
1807 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
1808 output hashes compatible with older versions of OpenSSL.
1809 [Willy Weisz <weisz@vcpc.univie.ac.at>]
1811 *) Fix compression algorithm handling: if resuming a session use the
1812 compression algorithm of the resumed session instead of determining
1813 it from client hello again. Don't allow server to change algorithm.
1816 *) Add load_crls() function to apps tidying load_certs() too. Add option
1817 to verify utility to allow additional CRLs to be included.
1820 *) Update OCSP request code to permit adding custom headers to the request:
1821 some responders need this.
1824 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
1826 [Julia Lawall <julia@diku.dk>]
1828 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
1829 needlessly dereferenced structures, used obsolete functions and
1830 didn't handle all updated verify codes correctly.
1833 *) Disable MD2 in the default configuration.
1836 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
1837 indicate the initial BIO being pushed or popped. This makes it possible
1838 to determine whether the BIO is the one explicitly called or as a result
1839 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
1840 it handles reference counts correctly and doesn't zero out the I/O bio
1841 when it is not being explicitly popped. WARNING: applications which
1842 included workarounds for the old buggy behaviour will need to be modified
1843 or they could free up already freed BIOs.
1846 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
1847 renaming to all platforms (within the 0.9.8 branch, this was
1848 done conditionally on Netware platforms to avoid a name clash).
1849 [Guenter <lists@gknw.net>]
1851 *) Add ECDHE and PSK support to DTLS.
1852 [Michael Tuexen <tuexen@fh-muenster.de>]
1854 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
1858 *) Add "missing" function EVP_MD_flags() (without this the only way to
1859 retrieve a digest flags is by accessing the structure directly. Update
1860 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
1861 or cipher is registered as in the "from" argument. Print out all
1862 registered digests in the dgst usage message instead of manually
1863 attempting to work them out.
1866 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
1867 this allows the use of compression and extensions. Change default cipher
1868 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
1869 by default unless an application cipher string requests it.
1872 *) Alter match criteria in PKCS12_parse(). It used to try to use local
1873 key ids to find matching certificates and keys but some PKCS#12 files
1874 don't follow the (somewhat unwritten) rules and this strategy fails.
1875 Now just gather all certificates together and the first private key
1876 then look for the first certificate that matches the key.
1879 *) Support use of registered digest and cipher names for dgst and cipher
1880 commands instead of having to add each one as a special case. So now
1887 openssl dgst -sha256 foo
1889 and this works for ENGINE based algorithms too.
1893 *) Update Gost ENGINE to support parameter files.
1894 [Victor B. Wagner <vitus@cryptocom.ru>]
1896 *) Support GeneralizedTime in ca utility.
1897 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
1899 *) Enhance the hash format used for certificate directory links. The new
1900 form uses the canonical encoding (meaning equivalent names will work
1901 even if they aren't identical) and uses SHA1 instead of MD5. This form
1902 is incompatible with the older format and as a result c_rehash should
1903 be used to rebuild symbolic links.
1906 *) Make PKCS#8 the default write format for private keys, replacing the
1907 traditional format. This form is standardised, more secure and doesn't
1908 include an implicit MD5 dependency.
1911 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
1912 committed to OpenSSL should pass this lot as a minimum.
1915 *) Add session ticket override functionality for use by EAP-FAST.
1916 [Jouni Malinen <j@w1.fi>]
1918 *) Modify HMAC functions to return a value. Since these can be implemented
1919 in an ENGINE errors can occur.
1922 *) Type-checked OBJ_bsearch_ex.
1925 *) Type-checked OBJ_bsearch. Also some constification necessitated
1926 by type-checking. Still to come: TXT_DB, bsearch(?),
1927 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
1931 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
1932 seconds to a tm structure directly, instead of going through OS
1933 specific date routines. This avoids any issues with OS routines such
1934 as the year 2038 bug. New *_adj() functions for ASN1 time structures
1935 and X509_time_adj_ex() to cover the extended range. The existing
1936 X509_time_adj() is still usable and will no longer have any date issues.
1939 *) Delta CRL support. New use deltas option which will attempt to locate
1940 and search any appropriate delta CRLs available.
1942 This work was sponsored by Google.
1945 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
1946 code and add additional score elements. Validate alternate CRL paths
1947 as part of the CRL checking and indicate a new error "CRL path validation
1948 error" in this case. Applications wanting additional details can use
1949 the verify callback and check the new "parent" field. If this is not
1950 NULL CRL path validation is taking place. Existing applications wont
1951 see this because it requires extended CRL support which is off by
1954 This work was sponsored by Google.
1957 *) Support for freshest CRL extension.
1959 This work was sponsored by Google.
1962 *) Initial indirect CRL support. Currently only supported in the CRLs
1963 passed directly and not via lookup. Process certificate issuer
1964 CRL entry extension and lookup CRL entries by bother issuer name
1965 and serial number. Check and process CRL issuer entry in IDP extension.
1967 This work was sponsored by Google.
1970 *) Add support for distinct certificate and CRL paths. The CRL issuer
1971 certificate is validated separately in this case. Only enabled if
1972 an extended CRL support flag is set: this flag will enable additional
1973 CRL functionality in future.
1975 This work was sponsored by Google.
1978 *) Add support for policy mappings extension.
1980 This work was sponsored by Google.
1983 *) Fixes to pathlength constraint, self issued certificate handling,
1984 policy processing to align with RFC3280 and PKITS tests.
1986 This work was sponsored by Google.
1989 *) Support for name constraints certificate extension. DN, email, DNS
1990 and URI types are currently supported.
1992 This work was sponsored by Google.
1995 *) To cater for systems that provide a pointer-based thread ID rather
1996 than numeric, deprecate the current numeric thread ID mechanism and
1997 replace it with a structure and associated callback type. This
1998 mechanism allows a numeric "hash" to be extracted from a thread ID in
1999 either case, and on platforms where pointers are larger than 'long',
2000 mixing is done to help ensure the numeric 'hash' is usable even if it
2001 can't be guaranteed unique. The default mechanism is to use "&errno"
2002 as a pointer-based thread ID to distinguish between threads.
2004 Applications that want to provide their own thread IDs should now use
2005 CRYPTO_THREADID_set_callback() to register a callback that will call
2006 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
2008 Note that ERR_remove_state() is now deprecated, because it is tied
2009 to the assumption that thread IDs are numeric. ERR_remove_state(0)
2010 to free the current thread's error state should be replaced by
2011 ERR_remove_thread_state(NULL).
2013 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
2014 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
2015 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
2016 application was previously providing a numeric thread callback that
2017 was inappropriate for distinguishing threads, then uniqueness might
2018 have been obtained with &errno that happened immediately in the
2019 intermediate development versions of OpenSSL; this is no longer the
2020 case, the numeric thread callback will now override the automatic use
2022 [Geoff Thorpe, with help from Bodo Moeller]
2024 *) Initial support for different CRL issuing certificates. This covers a
2025 simple case where the self issued certificates in the chain exist and
2026 the real CRL issuer is higher in the existing chain.
2028 This work was sponsored by Google.
2031 *) Removed effectively defunct crypto/store from the build.
2034 *) Revamp of STACK to provide stronger type-checking. Still to come:
2035 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
2036 ASN1_STRING, CONF_VALUE.
2039 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
2040 RAM on SSL connections. This option can save about 34k per idle SSL.
2043 *) Revamp of LHASH to provide stronger type-checking. Still to come:
2044 STACK, TXT_DB, bsearch, qsort.
2047 *) Initial support for Cryptographic Message Syntax (aka CMS) based
2048 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
2049 support for data, signedData, compressedData, digestedData and
2050 encryptedData, envelopedData types included. Scripts to check against
2051 RFC4134 examples draft and interop and consistency checks of many
2052 content types and variants.
2055 *) Add options to enc utility to support use of zlib compression BIO.
2058 *) Extend mk1mf to support importing of options and assembly language
2059 files from Configure script, currently only included in VC-WIN32.
2060 The assembly language rules can now optionally generate the source
2061 files from the associated perl scripts.
2064 *) Implement remaining functionality needed to support GOST ciphersuites.
2065 Interop testing has been performed using CryptoPro implementations.
2066 [Victor B. Wagner <vitus@cryptocom.ru>]
2068 *) s390x assembler pack.
2071 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
2075 *) Implement Opaque PRF Input TLS extension as specified in
2076 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
2077 official specification yet and no extension type assignment by
2078 IANA exists, this extension (for now) will have to be explicitly
2079 enabled when building OpenSSL by providing the extension number
2080 to use. For example, specify an option
2082 -DTLSEXT_TYPE_opaque_prf_input=0x9527
2084 to the "config" or "Configure" script to enable the extension,
2085 assuming extension number 0x9527 (which is a completely arbitrary
2086 and unofficial assignment based on the MD5 hash of the Internet
2087 Draft). Note that by doing so, you potentially lose
2088 interoperability with other TLS implementations since these might
2089 be using the same extension number for other purposes.
2091 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
2092 opaque PRF input value to use in the handshake. This will create
2093 an interal copy of the length-'len' string at 'src', and will
2094 return non-zero for success.
2096 To get more control and flexibility, provide a callback function
2099 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
2100 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
2104 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
2107 Callback function 'cb' will be called in handshakes, and is
2108 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
2109 Argument 'arg' is for application purposes (the value as given to
2110 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
2111 be provided to the callback function). The callback function
2112 has to return non-zero to report success: usually 1 to use opaque
2113 PRF input just if possible, or 2 to enforce use of the opaque PRF
2114 input. In the latter case, the library will abort the handshake
2115 if opaque PRF input is not successfully negotiated.
2117 Arguments 'peerinput' and 'len' given to the callback function
2118 will always be NULL and 0 in the case of a client. A server will
2119 see the client's opaque PRF input through these variables if
2120 available (NULL and 0 otherwise). Note that if the server
2121 provides an opaque PRF input, the length must be the same as the
2122 length of the client's opaque PRF input.
2124 Note that the callback function will only be called when creating
2125 a new session (session resumption can resume whatever was
2126 previously negotiated), and will not be called in SSL 2.0
2127 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
2128 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
2129 for applications that need to enforce opaque PRF input.
2133 *) Update ssl code to support digests other than SHA1+MD5 for handshake
2136 [Victor B. Wagner <vitus@cryptocom.ru>]
2138 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2139 RFC4507bis. The encrypted ticket format is an encrypted encoded
2140 SSL_SESSION structure, that way new session features are automatically
2143 If a client application caches session in an SSL_SESSION structure
2144 support is transparent because tickets are now stored in the encoded
2147 The SSL_CTX structure automatically generates keys for ticket
2148 protection in servers so again support should be possible
2149 with no application modification.
2151 If a client or server wishes to disable RFC4507 support then the option
2152 SSL_OP_NO_TICKET can be set.
2154 Add a TLS extension debugging callback to allow the contents of any client
2155 or server extensions to be examined.
2157 This work was sponsored by Google.
2160 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
2161 OpenSSL should now compile cleanly on gcc 4.2
2162 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
2164 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
2165 support including streaming MAC support: this is required for GOST
2166 ciphersuite support.
2167 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
2169 *) Add option -stream to use PKCS#7 streaming in smime utility. New
2170 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
2171 to output in BER and PEM format.
2174 *) Experimental support for use of HMAC via EVP_PKEY interface. This
2175 allows HMAC to be handled via the EVP_DigestSign*() interface. The
2176 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
2177 ENGINE support for HMAC keys which are unextractable. New -mac and
2178 -macopt options to dgst utility.
2181 *) New option -sigopt to dgst utility. Update dgst to use
2182 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
2183 alternative signing paramaters such as X9.31 or PSS in the dgst
2187 *) Change ssl_cipher_apply_rule(), the internal function that does
2188 the work each time a ciphersuite string requests enabling
2189 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
2190 removing ("!foo+bar") a class of ciphersuites: Now it maintains
2191 the order of disabled ciphersuites such that those ciphersuites
2192 that most recently went from enabled to disabled not only stay
2193 in order with respect to each other, but also have higher priority
2194 than other disabled ciphersuites the next time ciphersuites are
2197 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
2198 the same ciphersuites as with "HIGH" alone, but in a specific
2199 order where the PSK ciphersuites come first (since they are the
2200 most recently disabled ciphersuites when "HIGH" is parsed).
2202 Also, change ssl_create_cipher_list() (using this new
2203 funcionality) such that between otherwise identical
2204 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
2208 *) Change ssl_create_cipher_list() so that it automatically
2209 arranges the ciphersuites in reasonable order before starting
2210 to process the rule string. Thus, the definition for "DEFAULT"
2211 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
2212 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
2213 This makes it much easier to arrive at a reasonable default order
2214 in applications for which anonymous ciphers are OK (meaning
2215 that you can't actually use DEFAULT).
2216 [Bodo Moeller; suggested by Victor Duchovni]
2218 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
2219 processing) into multiple integers instead of setting
2220 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
2221 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
2222 (These masks as well as the individual bit definitions are hidden
2223 away into the non-exported interface ssl/ssl_locl.h, so this
2224 change to the definition of the SSL_CIPHER structure shouldn't
2225 affect applications.) This give us more bits for each of these
2226 categories, so there is no longer a need to coagulate AES128 and
2227 AES256 into a single algorithm bit, and to coagulate Camellia128
2228 and Camellia256 into a single algorithm bit, which has led to all
2231 Thus, among other things, the kludge introduced in 0.9.7m and
2232 0.9.8e for masking out AES256 independently of AES128 or masking
2233 out Camellia256 independently of AES256 is not needed here in 0.9.9.
2235 With the change, we also introduce new ciphersuite aliases that
2236 so far were missing: "AES128", "AES256", "CAMELLIA128", and
2240 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
2241 Use the leftmost N bytes of the signature input if the input is
2242 larger than the prime q (with N being the size in bytes of q).
2245 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
2246 it yet and it is largely untested.
2249 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
2252 *) Initial incomplete changes to avoid need for function casts in OpenSSL
2253 some compilers (gcc 4.2 and later) reject their use. Safestack is
2254 reimplemented. Update ASN1 to avoid use of legacy functions.
2257 *) Win32/64 targets are linked with Winsock2.
2260 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
2261 to external functions. This can be used to increase CRL handling
2262 efficiency especially when CRLs are very large by (for example) storing
2263 the CRL revoked certificates in a database.
2266 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
2267 new CRLs added to a directory can be used. New command line option
2268 -verify_return_error to s_client and s_server. This causes real errors
2269 to be returned by the verify callback instead of carrying on no matter
2270 what. This reflects the way a "real world" verify callback would behave.
2273 *) GOST engine, supporting several GOST algorithms and public key formats.
2274 Kindly donated by Cryptocom.
2277 *) Partial support for Issuing Distribution Point CRL extension. CRLs
2278 partitioned by DP are handled but no indirect CRL or reason partitioning
2279 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
2280 selected via a scoring technique which handles IDP and AKID in CRLs.
2283 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
2284 will ultimately be used for all verify operations: this will remove the
2285 X509_STORE dependency on certificate verification and allow alternative
2286 lookup methods. X509_STORE based implementations of these two callbacks.
2289 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
2290 Modify get_crl() to find a valid (unexpired) CRL if possible.
2293 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
2294 this would be called X509_CRL_cmp() but that name is already used by
2295 a function that just compares CRL issuer names. Cache several CRL
2296 extensions in X509_CRL structure and cache CRLDP in X509.
2299 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
2300 this maps equivalent X509_NAME structures into a consistent structure.
2301 Name comparison can then be performed rapidly using memcmp().
2304 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
2308 *) Allow digests to supply their own micalg string for S/MIME type using
2309 the ctrl EVP_MD_CTRL_MICALG.
2312 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
2313 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
2314 ctrl. It can then customise the structure before and/or after signing
2318 *) New function OBJ_add_sigid() to allow application defined signature OIDs
2319 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
2320 to free up any added signature OIDs.
2323 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
2324 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
2325 digest and cipher tables. New options added to openssl utility:
2326 list-message-digest-algorithms and list-cipher-algorithms.
2329 *) Change the array representation of binary polynomials: the list
2330 of degrees of non-zero coefficients is now terminated with -1.
2331 Previously it was terminated with 0, which was also part of the
2332 value; thus, the array representation was not applicable to
2333 polynomials where t^0 has coefficient zero. This change makes
2334 the array representation useful in a more general context.
2337 *) Various modifications and fixes to SSL/TLS cipher string
2338 handling. For ECC, the code now distinguishes between fixed ECDH
2339 with RSA certificates on the one hand and with ECDSA certificates
2340 on the other hand, since these are separate ciphersuites. The
2341 unused code for Fortezza ciphersuites has been removed.
2343 For consistency with EDH, ephemeral ECDH is now called "EECDH"
2344 (not "ECDHE"). For consistency with the code for DH
2345 certificates, use of ECDH certificates is now considered ECDH
2346 authentication, not RSA or ECDSA authentication (the latter is
2347 merely the CA's signing algorithm and not actively used in the
2350 The temporary ciphersuite alias "ECCdraft" is no longer
2351 available, and ECC ciphersuites are no longer excluded from "ALL"
2352 and "DEFAULT". The following aliases now exist for RFC 4492
2353 ciphersuites, most of these by analogy with the DH case:
2355 kECDHr - ECDH cert, signed with RSA
2356 kECDHe - ECDH cert, signed with ECDSA
2357 kECDH - ECDH cert (signed with either RSA or ECDSA)
2358 kEECDH - ephemeral ECDH
2359 ECDH - ECDH cert or ephemeral ECDH
2365 AECDH - anonymous ECDH
2366 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
2370 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
2371 Use correct micalg parameters depending on digest(s) in signed message.
2374 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
2375 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
2378 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
2379 an engine to register a method. Add ENGINE lookups for methods and
2380 functional reference processing.
2383 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
2384 EVP_{Sign,Verify}* which allow an application to customise the signature
2388 *) New -resign option to smime utility. This adds one or more signers
2389 to an existing PKCS#7 signedData structure. Also -md option to use an
2390 alternative message digest algorithm for signing.
2393 *) Tidy up PKCS#7 routines and add new functions to make it easier to
2394 create PKCS7 structures containing multiple signers. Update smime
2395 application to support multiple signers.
2398 *) New -macalg option to pkcs12 utility to allow setting of an alternative
2402 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
2403 Reorganize PBE internals to lookup from a static table using NIDs,
2404 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
2405 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
2406 PRF which will be automatically used with PBES2.
2409 *) Replace the algorithm specific calls to generate keys in "req" with the
2413 *) Update PKCS#7 enveloped data routines to use new API. This is now
2414 supported by any public key method supporting the encrypt operation. A
2415 ctrl is added to allow the public key algorithm to examine or modify
2416 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
2420 *) Add a ctrl to asn1 method to allow a public key algorithm to express
2421 a default digest type to use. In most cases this will be SHA1 but some
2422 algorithms (such as GOST) need to specify an alternative digest. The
2423 return value indicates how strong the preference is 1 means optional and
2424 2 is mandatory (that is it is the only supported type). Modify
2425 ASN1_item_sign() to accept a NULL digest argument to indicate it should
2426 use the default md. Update openssl utilities to use the default digest
2427 type for signing if it is not explicitly indicated.
2430 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
2431 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
2432 signing method from the key type. This effectively removes the link
2433 between digests and public key types.
2436 *) Add an OID cross reference table and utility functions. Its purpose is to
2437 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
2438 rsaEncryption. This will allow some of the algorithm specific hackery
2439 needed to use the correct OID to be removed.
2442 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
2443 structures for PKCS7_sign(). They are now set up by the relevant public
2447 *) Add provisional EC pkey method with support for ECDSA and ECDH.
2450 *) Add support for key derivation (agreement) in the API, DH method and
2454 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
2455 public and private key formats. As a side effect these add additional
2456 command line functionality not previously available: DSA signatures can be
2457 generated and verified using pkeyutl and DH key support and generation in
2462 [Oliver Tappe <zooey@hirschkaefer.de>]
2464 *) New make target "install_html_docs" installs HTML renditions of the
2466 [Oliver Tappe <zooey@hirschkaefer.de>]
2468 *) New utility "genpkey" this is analogous to "genrsa" etc except it can
2469 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
2470 support key and parameter generation and add initial key generation
2471 functionality for RSA.
2474 *) Add functions for main EVP_PKEY_method operations. The undocumented
2475 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
2476 EVP_PKEY_{encrypt,decrypt}_old.
2479 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
2480 key API, doesn't do much yet.
2483 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
2484 public key algorithms. New option to openssl utility:
2485 "list-public-key-algorithms" to print out info.
2488 *) Implement the Supported Elliptic Curves Extension for
2489 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2492 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
2493 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
2496 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
2497 utilities such as rsa, dsa, dsaparam etc except they process any key
2501 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
2502 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
2503 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
2507 *) Initial support for pluggable public key ASN1.
2508 De-spaghettify the public key ASN1 handling. Move public and private
2509 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
2510 algorithm specific handling to a single module within the relevant
2511 algorithm directory. Add functions to allow (near) opaque processing
2512 of public and private key structures.
2515 *) Implement the Supported Point Formats Extension for
2516 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2519 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
2520 for the psk identity [hint] and the psk callback functions to the
2521 SSL_SESSION, SSL and SSL_CTX structure.
2524 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
2528 SSL_CTX_use_psk_identity_hint
2529 SSL_get_psk_identity_hint
2530 SSL_get_psk_identity
2531 SSL_use_psk_identity_hint
2533 [Mika Kousa and Pasi Eronen of Nokia Corporation]
2535 *) Add RFC 3161 compliant time stamp request creation, response generation
2536 and response verification functionality.
2537 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
2539 *) Add initial support for TLS extensions, specifically for the server_name
2540 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2541 have new members for a host name. The SSL data structure has an
2542 additional member SSL_CTX *initial_ctx so that new sessions can be
2543 stored in that context to allow for session resumption, even after the
2544 SSL has been switched to a new SSL_CTX in reaction to a client's
2545 server_name extension.
2547 New functions (subject to change):
2549 SSL_get_servername()
2550 SSL_get_servername_type()
2553 New CTRL codes and macros (subject to change):
2555 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2556 - SSL_CTX_set_tlsext_servername_callback()
2557 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2558 - SSL_CTX_set_tlsext_servername_arg()
2559 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2561 openssl s_client has a new '-servername ...' option.
2563 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2564 '-key2 ...', '-servername_fatal' (subject to change). This allows
2565 testing the HostName extension for a specific single host name ('-cert'
2566 and '-key' remain fallbacks for handshakes without HostName
2567 negotiation). If the unrecognized_name alert has to be sent, this by
2568 default is a warning; it becomes fatal with the '-servername_fatal'
2571 [Peter Sylvester, Remy Allais, Christophe Renou]
2573 *) Whirlpool hash implementation is added.
2576 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
2577 bn(64,32). Because of instruction set limitations it doesn't have
2578 any negative impact on performance. This was done mostly in order
2579 to make it possible to share assembler modules, such as bn_mul_mont
2580 implementations, between 32- and 64-bit builds without hassle.
2583 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
2584 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
2588 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
2589 dedicated Montgomery multiplication procedure, is introduced.
2590 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
2591 "64-bit" performance on certain 32-bit targets.
2594 *) New option SSL_OP_NO_COMP to disable use of compression selectively
2595 in SSL structures. New SSL ctrl to set maximum send fragment size.
2596 Save memory by seeting the I/O buffer sizes dynamically instead of
2597 using the maximum available value.
2600 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
2601 in addition to the text details.
2604 *) Very, very preliminary EXPERIMENTAL support for printing of general
2605 ASN1 structures. This currently produces rather ugly output and doesn't
2606 handle several customised structures at all.
2609 *) Integrated support for PVK file format and some related formats such
2610 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
2611 these in the 'rsa' and 'dsa' utilities.
2614 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
2617 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
2618 place for the (very old) "NETSCAPE" format certificates which are now
2619 handled using new ASN1 code equivalents.
2622 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
2623 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
2624 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
2627 *) Modify CRL distribution points extension code to print out previously
2628 unsupported fields. Enhance extension setting code to allow setting of
2632 *) Add print and set support for Issuing Distribution Point CRL extension.
2635 *) Change 'Configure' script to enable Camellia by default.
2638 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
2640 *) When rejecting SSL/TLS records due to an incorrect version number, never
2641 update s->server with a new major version number. As of
2642 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
2643 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
2644 the previous behavior could result in a read attempt at NULL when
2645 receiving specific incorrect SSL/TLS records once record payload
2646 protection is active. (CVE-2010-0740)
2647 [Bodo Moeller, Adam Langley <agl@chromium.org>]
2649 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
2650 could be crashed if the relevant tables were not present (e.g. chrooted).
2651 [Tomas Hoger <thoger@redhat.com>]
2653 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
2655 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
2656 [Martin Olsson, Neel Mehta]
2658 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
2659 accommodate for stack sorting, always a write lock!).
2662 *) On some versions of WIN32 Heap32Next is very slow. This can cause
2663 excessive delays in the RAND_poll(): over a minute. As a workaround
2664 include a time check in the inner Heap32Next loop too.
2667 *) The code that handled flushing of data in SSL/TLS originally used the
2668 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
2669 the problem outlined in PR#1949. The fix suggested there however can
2670 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
2671 of Apache). So instead simplify the code to flush unconditionally.
2672 This should be fine since flushing with no data to flush is a no op.
2675 *) Handle TLS versions 2.0 and later properly and correctly use the
2676 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
2677 off ancient servers have a habit of sticking around for a while...
2680 *) Modify compression code so it frees up structures without using the
2681 ex_data callbacks. This works around a problem where some applications
2682 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
2683 restarting) then use compression (e.g. SSL with compression) later.
2684 This results in significant per-connection memory leaks and
2685 has caused some security issues including CVE-2008-1678 and
2689 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
2690 change when encrypting or decrypting.
2693 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
2694 connect and renegotiate with servers which do not support RI.
2695 Until RI is more widely deployed this option is enabled by default.
2698 *) Add "missing" ssl ctrls to clear options and mode.
2701 *) If client attempts to renegotiate and doesn't support RI respond with
2702 a no_renegotiation alert as required by RFC5746. Some renegotiating
2703 TLS clients will continue a connection gracefully when they receive
2704 the alert. Unfortunately OpenSSL mishandled this alert and would hang
2705 waiting for a server hello which it will never receive. Now we treat a
2706 received no_renegotiation alert as a fatal error. This is because
2707 applications requesting a renegotiation might well expect it to succeed
2708 and would have no code in place to handle the server denying it so the
2709 only safe thing to do is to terminate the connection.
2712 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
2713 peer supports secure renegotiation and 0 otherwise. Print out peer
2714 renegotiation support in s_client/s_server.
2717 *) Replace the highly broken and deprecated SPKAC certification method with
2718 the updated NID creation version. This should correctly handle UTF8.
2721 *) Implement RFC5746. Re-enable renegotiation but require the extension
2722 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
2723 turns out to be a bad idea. It has been replaced by
2724 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
2725 SSL_CTX_set_options(). This is really not recommended unless you
2726 know what you are doing.
2727 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
2729 *) Fixes to stateless session resumption handling. Use initial_ctx when
2730 issuing and attempting to decrypt tickets in case it has changed during
2731 servername handling. Use a non-zero length session ID when attempting
2732 stateless session resumption: this makes it possible to determine if
2733 a resumption has occurred immediately after receiving server hello
2734 (several places in OpenSSL subtly assume this) instead of later in
2738 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
2739 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
2740 fixes for a few places where the return code is not checked
2742 [Julia Lawall <julia@diku.dk>]
2744 *) Add --strict-warnings option to Configure script to include devteam
2745 warnings in other configurations.
2748 *) Add support for --libdir option and LIBDIR variable in makefiles. This
2749 makes it possible to install openssl libraries in locations which
2750 have names other than "lib", for example "/usr/lib64" which some
2752 [Steve Henson, based on patch from Jeremy Utley]
2754 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
2755 X690 8.9.12 and can produce some misleading textual output of OIDs.
2756 [Steve Henson, reported by Dan Kaminsky]
2758 *) Delete MD2 from algorithm tables. This follows the recommendation in
2759 several standards that it is not used in new applications due to
2760 several cryptographic weaknesses. For binary compatibility reasons
2761 the MD2 API is still compiled in by default.
2764 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
2768 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
2769 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
2771 [Guenter <lists@gknw.net>]
2773 *) Fix the server certificate chain building code to use X509_verify_cert(),
2774 it used to have an ad-hoc builder which was unable to cope with anything
2775 other than a simple chain.
2776 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
2778 *) Don't check self signed certificate signatures in X509_verify_cert()
2779 by default (a flag can override this): it just wastes time without
2780 adding any security. As a useful side effect self signed root CAs
2781 with non-FIPS digests are now usable in FIPS mode.
2784 *) In dtls1_process_out_of_seq_message() the check if the current message
2785 is already buffered was missing. For every new message was memory
2786 allocated, allowing an attacker to perform an denial of service attack
2787 with sending out of seq handshake messages until there is no memory
2788 left. Additionally every future messege was buffered, even if the
2789 sequence number made no sense and would be part of another handshake.
2790 So only messages with sequence numbers less than 10 in advance will be
2791 buffered. (CVE-2009-1378)
2792 [Robin Seggelmann, discovered by Daniel Mentz]
2794 *) Records are buffered if they arrive with a future epoch to be
2795 processed after finishing the corresponding handshake. There is
2796 currently no limitation to this buffer allowing an attacker to perform
2797 a DOS attack with sending records with future epochs until there is no
2798 memory left. This patch adds the pqueue_size() function to determine
2799 the size of a buffer and limits the record buffer to 100 entries.
2801 [Robin Seggelmann, discovered by Daniel Mentz]
2803 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
2804 parent structure is freed. (CVE-2009-1379)
2807 *) Handle non-blocking I/O properly in SSL_shutdown() call.
2808 [Darryl Miles <darryl-mailinglists@netbauds.net>]
2811 [Ilya O. <vrghost@gmail.com>]
2813 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
2815 *) Disable renegotiation completely - this fixes a severe security
2816 problem (CVE-2009-3555) at the cost of breaking all
2817 renegotiation. Renegotiation can be re-enabled by setting
2818 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
2819 run-time. This is really not recommended unless you know what
2823 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
2825 *) Don't set val to NULL when freeing up structures, it is freed up by
2826 underlying code. If sizeof(void *) > sizeof(long) this can result in
2827 zeroing past the valid field. (CVE-2009-0789)
2828 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
2830 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
2831 checked correctly. This would allow some invalid signed attributes to
2832 appear to verify correctly. (CVE-2009-0591)
2833 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2835 *) Reject UniversalString and BMPString types with invalid lengths. This
2836 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
2837 a legal length. (CVE-2009-0590)
2840 *) Set S/MIME signing as the default purpose rather than setting it
2841 unconditionally. This allows applications to override it at the store
2845 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2846 to handle some structures.
2849 *) Improve efficiency of mem_gets: don't search whole buffer each time
2851 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2853 *) New -hex option for openssl rand.
2856 *) Print out UTF8String and NumericString when parsing ASN1.
2859 *) Support NumericString type for name components.
2862 *) Allow CC in the environment to override the automatically chosen
2863 compiler. Note that nothing is done to ensure flags work with the
2867 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2869 *) Properly check EVP_VerifyFinal() and similar return values
2871 [Ben Laurie, Bodo Moeller, Google Security Team]
2873 *) Enable TLS extensions by default.
2876 *) Allow the CHIL engine to be loaded, whether the application is
2877 multithreaded or not. (This does not release the developer from the
2878 obligation to set up the dynamic locking callbacks.)
2879 [Sander Temme <sander@temme.net>]
2881 *) Use correct exit code if there is an error in dgst command.
2882 [Steve Henson; problem pointed out by Roland Dirlewanger]
2884 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2885 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2888 *) Add experimental JPAKE support, including demo authentication in
2889 s_client and s_server.
2892 *) Set the comparison function in v3_addr_canonize().
2893 [Rob Austein <sra@hactrn.net>]
2895 *) Add support for XMPP STARTTLS in s_client.
2896 [Philip Paeps <philip@freebsd.org>]
2898 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2899 to ensure that even with this option, only ciphersuites in the
2900 server's preference list will be accepted. (Note that the option
2901 applies only when resuming a session, so the earlier behavior was
2902 just about the algorithm choice for symmetric cryptography.)
2905 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2907 *) Fix NULL pointer dereference if a DTLS server received
2908 ChangeCipherSpec as first record (CVE-2009-1386).
2911 *) Fix a state transition in s3_srvr.c and d1_srvr.c
2912 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2915 *) The fix in 0.9.8c that supposedly got rid of unsafe
2916 double-checked locking was incomplete for RSA blinding,
2917 addressing just one layer of what turns out to have been
2918 doubly unsafe triple-checked locking.
2920 So now fix this for real by retiring the MONT_HELPER macro
2921 in crypto/rsa/rsa_eay.c.
2923 [Bodo Moeller; problem pointed out by Marius Schilder]
2925 *) Various precautionary measures:
2927 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2929 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2930 (NB: This would require knowledge of the secret session ticket key
2931 to exploit, in which case you'd be SOL either way.)
2933 - Change bn_nist.c so that it will properly handle input BIGNUMs
2934 outside the expected range.
2936 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2939 [Neel Mehta, Bodo Moeller]
2941 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2942 the load fails. Useful for distros.
2943 [Ben Laurie and the FreeBSD team]
2945 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2948 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2951 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2953 This work was sponsored by Logica.
2956 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2957 keystores. Support for SSL/TLS client authentication too.
2958 Not compiled unless enable-capieng specified to Configure.
2960 This work was sponsored by Logica.
2963 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2964 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2965 attribute creation routines such as certifcate requests and PKCS#12
2969 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2971 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2972 handshake which could lead to a cilent crash as found using the
2973 Codenomicon TLS test suite (CVE-2008-1672)
2974 [Steve Henson, Mark Cox]
2976 *) Fix double free in TLS server name extensions which could lead to
2977 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2980 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2982 Clear the error queue to ensure that error entries left from
2983 older function calls do not interfere with the correct operation.
2984 [Lutz Jaenicke, Erik de Castro Lopo]
2986 *) Remove root CA certificates of commercial CAs:
2988 The OpenSSL project does not recommend any specific CA and does not
2989 have any policy with respect to including or excluding any CA.
2990 Therefore it does not make any sense to ship an arbitrary selection
2991 of root CA certificates with the OpenSSL software.
2994 *) RSA OAEP patches to fix two separate invalid memory reads.
2995 The first one involves inputs when 'lzero' is greater than
2996 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
2997 before the beginning of from). The second one involves inputs where
2998 the 'db' section contains nothing but zeroes (there is a one-byte
2999 invalid read after the end of 'db').
3000 [Ivan Nestlerode <inestlerode@us.ibm.com>]
3002 *) Partial backport from 0.9.9-dev:
3004 Introduce bn_mul_mont (dedicated Montgomery multiplication
3005 procedure) as a candidate for BIGNUM assembler implementation.
3006 While 0.9.9-dev uses assembler for various architectures, only
3007 x86_64 is available by default here in the 0.9.8 branch, and
3008 32-bit x86 is available through a compile-time setting.
3010 To try the 32-bit x86 assembler implementation, use Configure
3011 option "enable-montasm" (which exists only for this backport).
3013 As "enable-montasm" for 32-bit x86 disclaims code stability
3014 anyway, in this constellation we activate additional code
3015 backported from 0.9.9-dev for further performance improvements,
3016 namely BN_from_montgomery_word. (To enable this otherwise,
3017 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
3019 [Andy Polyakov (backport partially by Bodo Moeller)]
3021 *) Add TLS session ticket callback. This allows an application to set
3022 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
3023 values. This is useful for key rollover for example where several key
3024 sets may exist with different names.
3027 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
3028 This was broken until now in 0.9.8 releases, such that the only way
3029 a registered ENGINE could be used (assuming it initialises
3030 successfully on the host) was to explicitly set it as the default
3031 for the relevant algorithms. This is in contradiction with 0.9.7
3032 behaviour and the documentation. With this fix, when an ENGINE is
3033 registered into a given algorithm's table of implementations, the
3034 'uptodate' flag is reset so that auto-discovery will be used next
3035 time a new context for that algorithm attempts to select an
3037 [Ian Lister (tweaked by Geoff Thorpe)]
3039 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
3040 implemention in the following ways:
3042 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
3045 Lack of BER streaming support means one pass streaming processing is
3046 only supported if data is detached: setting the streaming flag is
3047 ignored for embedded content.
3049 CMS support is disabled by default and must be explicitly enabled
3050 with the enable-cms configuration option.
3053 *) Update the GMP engine glue to do direct copies between BIGNUM and
3054 mpz_t when openssl and GMP use the same limb size. Otherwise the
3055 existing "conversion via a text string export" trick is still used.
3056 [Paul Sheer <paulsheer@gmail.com>]
3058 *) Zlib compression BIO. This is a filter BIO which compressed and
3059 uncompresses any data passed through it.
3062 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
3063 RFC3394 compatible AES key wrapping.
3066 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
3067 sets string data without copying. X509_ALGOR_set0() and
3068 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
3069 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
3070 from an X509_ATTRIBUTE structure optionally checking it occurs only
3071 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
3075 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
3076 to get the expected BN_FLG_CONSTTIME behavior.
3077 [Bodo Moeller (Google)]
3081 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
3082 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
3083 - added some more tests to do_tests.pl
3084 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
3085 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
3086 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
3087 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
3088 - various changes to netware.pl to enable gcc-cross builds on Win32
3090 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
3091 - various changes to fix missing prototype warnings
3092 - fixed x86nasm.pl to create correct asm files for NASM COFF output
3093 - added AES, WHIRLPOOL and CPUID assembler code to build files
3094 - added missing AES assembler make rules to mk1mf.pl
3095 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
3096 [Guenter Knauf <eflash@gmx.net>]
3098 *) Implement certificate status request TLS extension defined in RFC3546.
3099 A client can set the appropriate parameters and receive the encoded
3100 OCSP response via a callback. A server can query the supplied parameters
3101 and set the encoded OCSP response in the callback. Add simplified examples
3102 to s_client and s_server.
3105 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
3107 *) Fix various bugs:
3108 + Binary incompatibility of ssl_ctx_st structure
3109 + DTLS interoperation with non-compliant servers
3110 + Don't call get_session_cb() without proposed session
3111 + Fix ia64 assembler code
3112 [Andy Polyakov, Steve Henson]
3114 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
3116 *) DTLS Handshake overhaul. There were longstanding issues with
3117 OpenSSL DTLS implementation, which were making it impossible for
3118 RFC 4347 compliant client to communicate with OpenSSL server.
3119 Unfortunately just fixing these incompatibilities would "cut off"
3120 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
3121 server keeps tolerating non RFC compliant syntax. The opposite is
3122 not true, 0.9.8f client can not communicate with earlier server.
3123 This update even addresses CVE-2007-4995.
3126 *) Changes to avoid need for function casts in OpenSSL: some compilers
3127 (gcc 4.2 and later) reject their use.
3128 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
3131 *) Add RFC4507 support to OpenSSL. This includes the corrections in
3132 RFC4507bis. The encrypted ticket format is an encrypted encoded
3133 SSL_SESSION structure, that way new session features are automatically
3136 If a client application caches session in an SSL_SESSION structure
3137 support is transparent because tickets are now stored in the encoded
3140 The SSL_CTX structure automatically generates keys for ticket
3141 protection in servers so again support should be possible
3142 with no application modification.
3144 If a client or server wishes to disable RFC4507 support then the option
3145 SSL_OP_NO_TICKET can be set.
3147 Add a TLS extension debugging callback to allow the contents of any client
3148 or server extensions to be examined.
3150 This work was sponsored by Google.
3153 *) Add initial support for TLS extensions, specifically for the server_name
3154 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
3155 have new members for a host name. The SSL data structure has an
3156 additional member SSL_CTX *initial_ctx so that new sessions can be
3157 stored in that context to allow for session resumption, even after the
3158 SSL has been switched to a new SSL_CTX in reaction to a client's
3159 server_name extension.
3161 New functions (subject to change):
3163 SSL_get_servername()
3164 SSL_get_servername_type()
3167 New CTRL codes and macros (subject to change):
3169 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
3170 - SSL_CTX_set_tlsext_servername_callback()
3171 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
3172 - SSL_CTX_set_tlsext_servername_arg()
3173 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
3175 openssl s_client has a new '-servername ...' option.
3177 openssl s_server has new options '-servername_host ...', '-cert2 ...',
3178 '-key2 ...', '-servername_fatal' (subject to change). This allows
3179 testing the HostName extension for a specific single host name ('-cert'
3180 and '-key' remain fallbacks for handshakes without HostName
3181 negotiation). If the unrecognized_name alert has to be sent, this by
3182 default is a warning; it becomes fatal with the '-servername_fatal'
3185 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
3187 *) Add AES and SSE2 assembly language support to VC++ build.
3190 *) Mitigate attack on final subtraction in Montgomery reduction.
3193 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
3194 (which previously caused an internal error).
3197 *) Squeeze another 10% out of IGE mode when in != out.
3200 *) AES IGE mode speedup.
3201 [Dean Gaudet (Google)]
3203 *) Add the Korean symmetric 128-bit cipher SEED (see
3204 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
3205 add SEED ciphersuites from RFC 4162:
3207 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
3208 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
3209 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
3210 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
3212 To minimize changes between patchlevels in the OpenSSL 0.9.8
3213 series, SEED remains excluded from compilation unless OpenSSL
3214 is configured with 'enable-seed'.
3215 [KISA, Bodo Moeller]
3217 *) Mitigate branch prediction attacks, which can be practical if a
3218 single processor is shared, allowing a spy process to extract
3219 information. For detailed background information, see
3220 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
3221 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
3222 and Necessary Software Countermeasures"). The core of the change
3223 are new versions BN_div_no_branch() and
3224 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
3225 respectively, which are slower, but avoid the security-relevant
3226 conditional branches. These are automatically called by BN_div()
3227 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
3228 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
3229 remove a conditional branch.
3231 BN_FLG_CONSTTIME is the new name for the previous
3232 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
3233 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
3234 in the exponent causes BN_mod_exp_mont() to use the alternative
3235 implementation in BN_mod_exp_mont_consttime().) The old name
3236 remains as a deprecated alias.
3238 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
3239 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
3240 constant-time implementations for more than just exponentiation.
3241 Here too the old name is kept as a deprecated alias.
3243 BN_BLINDING_new() will now use BN_dup() for the modulus so that
3244 the BN_BLINDING structure gets an independent copy of the
3245 modulus. This means that the previous "BIGNUM *m" argument to
3246 BN_BLINDING_new() and to BN_BLINDING_create_param() now
3247 essentially becomes "const BIGNUM *m", although we can't actually
3248 change this in the header file before 0.9.9. It allows
3249 RSA_setup_blinding() to use BN_with_flags() on the modulus to
3250 enable BN_FLG_CONSTTIME.
3252 [Matthew D Wood (Intel Corp)]
3254 *) In the SSL/TLS server implementation, be strict about session ID
3255 context matching (which matters if an application uses a single
3256 external cache for different purposes). Previously,
3257 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
3258 set. This did ensure strict client verification, but meant that,
3259 with applications using a single external cache for quite
3260 different requirements, clients could circumvent ciphersuite
3261 restrictions for a given session ID context by starting a session
3262 in a different context.
3265 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3266 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3267 authentication-only ciphersuites.
3270 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
3271 not complete and could lead to a possible single byte overflow
3272 (CVE-2007-5135) [Ben Laurie]
3274 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
3276 *) Since AES128 and AES256 (and similarly Camellia128 and
3277 Camellia256) share a single mask bit in the logic of
3278 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3279 kludge to work properly if AES128 is available and AES256 isn't
3280 (or if Camellia128 is available and Camellia256 isn't).
3283 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
3284 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
3285 When a point or a seed is encoded in a BIT STRING, we need to
3286 prevent the removal of trailing zero bits to get the proper DER
3287 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
3288 of a NamedBitList, for which trailing 0 bits need to be removed.)
3291 *) Have SSL/TLS server implementation tolerate "mismatched" record
3292 protocol version while receiving ClientHello even if the
3293 ClientHello is fragmented. (The server can't insist on the
3294 particular protocol version it has chosen before the ServerHello
3295 message has informed the client about his choice.)
3298 *) Add RFC 3779 support.
3299 [Rob Austein for ARIN, Ben Laurie]
3301 *) Load error codes if they are not already present instead of using a
3302 static variable. This allows them to be cleanly unloaded and reloaded.
3303 Improve header file function name parsing.
3306 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
3307 or CAPABILITY handshake as required by RFCs.
3310 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
3312 *) Introduce limits to prevent malicious keys being able to
3313 cause a denial of service. (CVE-2006-2940)
3314 [Steve Henson, Bodo Moeller]
3316 *) Fix ASN.1 parsing of certain invalid structures that can result
3317 in a denial of service. (CVE-2006-2937) [Steve Henson]
3319 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3320 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3322 *) Fix SSL client code which could crash if connecting to a
3323 malicious SSLv2 server. (CVE-2006-4343)
3324 [Tavis Ormandy and Will Drewry, Google Security Team]
3326 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
3327 match only those. Before that, "AES256-SHA" would be interpreted
3328 as a pattern and match "AES128-SHA" too (since AES128-SHA got
3329 the same strength classification in 0.9.7h) as we currently only
3330 have a single AES bit in the ciphersuite description bitmap.
3331 That change, however, also applied to ciphersuite strings such as
3332 "RC4-MD5" that intentionally matched multiple ciphersuites --
3333 namely, SSL 2.0 ciphersuites in addition to the more common ones
3334 from SSL 3.0/TLS 1.0.
3336 So we change the selection algorithm again: Naming an explicit
3337 ciphersuite selects this one ciphersuite, and any other similar
3338 ciphersuite (same bitmap) from *other* protocol versions.
3339 Thus, "RC4-MD5" again will properly select both the SSL 2.0
3340 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
3342 Since SSL 2.0 does not have any ciphersuites for which the
3343 128/256 bit distinction would be relevant, this works for now.
3344 The proper fix will be to use different bits for AES128 and
3345 AES256, which would have avoided the problems from the beginning;
3346 however, bits are scarce, so we can only do this in a new release
3347 (not just a patchlevel) when we can change the SSL_CIPHER
3348 definition to split the single 'unsigned long mask' bitmap into
3349 multiple values to extend the available space.
3353 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
3355 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3356 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3358 *) Add AES IGE and biIGE modes.
3361 *) Change the Unix randomness entropy gathering to use poll() when
3362 possible instead of select(), since the latter has some
3363 undesirable limitations.
3364 [Darryl Miles via Richard Levitte and Bodo Moeller]
3366 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
3367 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
3368 cannot be implicitly activated as part of, e.g., the "AES" alias.
3369 However, please upgrade to OpenSSL 0.9.9[-dev] for
3370 non-experimental use of the ECC ciphersuites to get TLS extension
3371 support, which is required for curve and point format negotiation
3372 to avoid potential handshake problems.
3375 *) Disable rogue ciphersuites:
3377 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3378 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3379 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3381 The latter two were purportedly from
3382 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3385 Also deactivate the remaining ciphersuites from
3386 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3387 unofficial, and the ID has long expired.
3390 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3391 dual-core machines) and other potential thread-safety issues.
3394 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
3395 versions), which is now available for royalty-free use
3396 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
3397 Also, add Camellia TLS ciphersuites from RFC 4132.
3399 To minimize changes between patchlevels in the OpenSSL 0.9.8
3400 series, Camellia remains excluded from compilation unless OpenSSL
3401 is configured with 'enable-camellia'.
3404 *) Disable the padding bug check when compression is in use. The padding
3405 bug check assumes the first packet is of even length, this is not
3406 necessarily true if compresssion is enabled and can result in false
3407 positives causing handshake failure. The actual bug test is ancient
3408 code so it is hoped that implementations will either have fixed it by
3409 now or any which still have the bug do not support compression.
3412 Changes between 0.9.8a and 0.9.8b [04 May 2006]
3414 *) When applying a cipher rule check to see if string match is an explicit
3415 cipher suite and only match that one cipher suite if it is.
3418 *) Link in manifests for VC++ if needed.
3419 [Austin Ziegler <halostatue@gmail.com>]
3421 *) Update support for ECC-based TLS ciphersuites according to
3422 draft-ietf-tls-ecc-12.txt with proposed changes (but without
3423 TLS extensions, which are supported starting with the 0.9.9
3424 branch, not in the OpenSSL 0.9.8 branch).
3427 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
3428 opaque EVP_CIPHER_CTX handling.
3431 *) Fixes and enhancements to zlib compression code. We now only use
3432 "zlib1.dll" and use the default __cdecl calling convention on Win32
3433 to conform with the standards mentioned here:
3434 http://www.zlib.net/DLL_FAQ.txt
3435 Static zlib linking now works on Windows and the new --with-zlib-include
3436 --with-zlib-lib options to Configure can be used to supply the location
3437 of the headers and library. Gracefully handle case where zlib library
3441 *) Several fixes and enhancements to the OID generation code. The old code
3442 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
3443 handle numbers larger than ULONG_MAX, truncated printing and had a
3444 non standard OBJ_obj2txt() behaviour.
3447 *) Add support for building of engines under engine/ as shared libraries
3448 under VC++ build system.
3451 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
3452 Hopefully, we will not see any false combination of paths any more.
3455 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
3457 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3458 (part of SSL_OP_ALL). This option used to disable the
3459 countermeasure against man-in-the-middle protocol-version
3460 rollback in the SSL 2.0 server implementation, which is a bad
3461 idea. (CVE-2005-2969)
3463 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3464 for Information Security, National Institute of Advanced Industrial
3465 Science and Technology [AIST], Japan)]
3467 *) Add two function to clear and return the verify parameter flags.
3470 *) Keep cipherlists sorted in the source instead of sorting them at
3471 runtime, thus removing the need for a lock.
3474 *) Avoid some small subgroup attacks in Diffie-Hellman.
3475 [Nick Mathewson and Ben Laurie]
3477 *) Add functions for well-known primes.
3480 *) Extended Windows CE support.
3481 [Satoshi Nakamura and Andy Polyakov]
3483 *) Initialize SSL_METHOD structures at compile time instead of during
3484 runtime, thus removing the need for a lock.
3487 *) Make PKCS7_decrypt() work even if no certificate is supplied by
3488 attempting to decrypt each encrypted key in turn. Add support to
3492 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
3494 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
3497 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
3500 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
3501 key into the same file any more.
3504 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
3507 *) Add -utf8 command line and config file option to 'ca'.
3508 [Stefan <stf@udoma.org]
3510 *) Removed the macro des_crypt(), as it seems to conflict with some
3511 libraries. Use DES_crypt().
3514 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
3515 involves renaming the source and generated shared-libs for
3516 both. The engines will accept the corrected or legacy ids
3517 ('ncipher' and '4758_cca' respectively) when binding. NB,
3518 this only applies when building 'shared'.
3519 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
3521 *) Add attribute functions to EVP_PKEY structure. Modify
3522 PKCS12_create() to recognize a CSP name attribute and
3523 use it. Make -CSP option work again in pkcs12 utility.
3526 *) Add new functionality to the bn blinding code:
3527 - automatic re-creation of the BN_BLINDING parameters after
3528 a fixed number of uses (currently 32)
3529 - add new function for parameter creation
3530 - introduce flags to control the update behaviour of the
3531 BN_BLINDING parameters
3532 - hide BN_BLINDING structure
3533 Add a second BN_BLINDING slot to the RSA structure to improve
3534 performance when a single RSA object is shared among several
3538 *) Add support for DTLS.
3539 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
3541 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
3542 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
3545 *) Remove buggy and incomplete DH cert support from
3546 ssl/ssl_rsa.c and ssl/s3_both.c
3549 *) Use SHA-1 instead of MD5 as the default digest algorithm for
3550 the apps/openssl applications.
3553 *) Compile clean with "-Wall -Wmissing-prototypes
3554 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
3555 DEBUG_SAFESTACK must also be set.
3558 *) Change ./Configure so that certain algorithms can be disabled by default.
3559 The new counterpiece to "no-xxx" is "enable-xxx".
3561 The patented RC5 and MDC2 algorithms will now be disabled unless
3562 "enable-rc5" and "enable-mdc2", respectively, are specified.
3564 (IDEA remains enabled despite being patented. This is because IDEA
3565 is frequently required for interoperability, and there is no license
3566 fee for non-commercial use. As before, "no-idea" can be used to
3567 avoid this algorithm.)
3571 *) Add processing of proxy certificates (see RFC 3820). This work was
3572 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
3573 EGEE (Enabling Grids for E-science in Europe).
3576 *) RC4 performance overhaul on modern architectures/implementations, such
3577 as Intel P4, IA-64 and AMD64.
3580 *) New utility extract-section.pl. This can be used specify an alternative
3581 section number in a pod file instead of having to treat each file as
3582 a separate case in Makefile. This can be done by adding two lines to the
3585 =for comment openssl_section:XXX
3587 The blank line is mandatory.
3591 *) New arguments -certform, -keyform and -pass for s_client and s_server
3592 to allow alternative format key and certificate files and passphrase
3596 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
3597 update associated structures and add various utility functions.
3599 Add new policy related verify parameters, include policy checking in
3600 standard verify code. Enhance 'smime' application with extra parameters
3601 to support policy checking and print out.
3604 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
3605 Nehemiah processors. These extensions support AES encryption in hardware
3606 as well as RNG (though RNG support is currently disabled).
3607 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
3609 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
3612 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
3613 [Andy Polyakov and a number of other people]
3615 *) Improved PowerPC platform support. Most notably BIGNUM assembler
3616 implementation contributed by IBM.
3617 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
3619 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
3620 exponent rather than 'unsigned long'. There is a corresponding change to
3621 the new 'rsa_keygen' element of the RSA_METHOD structure.
3622 [Jelte Jansen, Geoff Thorpe]
3624 *) Functionality for creating the initial serial number file is now
3625 moved from CA.pl to the 'ca' utility with a new option -create_serial.
3627 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
3628 number file to 1, which is bound to cause problems. To avoid
3629 the problems while respecting compatibility between different 0.9.7
3630 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
3631 CA.pl for serial number initialization. With the new release 0.9.8,
3632 we can fix the problem directly in the 'ca' utility.)
3635 *) Reduced header interdepencies by declaring more opaque objects in
3636 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
3637 give fewer recursive includes, which could break lazy source code - so
3638 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
3639 developers should define this symbol when building and using openssl to
3640 ensure they track the recommended behaviour, interfaces, [etc], but
3641 backwards-compatible behaviour prevails when this isn't defined.
3644 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
3647 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
3648 This will generate a random key of the appropriate length based on the
3649 cipher context. The EVP_CIPHER can provide its own random key generation
3650 routine to support keys&n
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