5 Changes between 1.0.2 and 1.1.0 [xx XXX xxxx]
6 *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This
7 code and the associated standard is no longer considered fit-for-purpose.
10 *) Added HTTP GET support to the ocsp command.
13 *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead.
16 *) Added support for TLS extended master secret from
17 draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an
18 initial patch which was a great help during development.
21 *) All libssl internal structures have been removed from the public header
22 files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is
23 now redundant). Users should not attempt to access internal structures
24 directly. Instead they should use the provided API functions.
27 *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used.
28 Access to deprecated functions can be re-enabled by running config with
29 "enable-deprecated". In addition applications wishing to use deprecated
30 functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour
31 will, by default, disable some transitive includes that previously existed
32 in the header files (e.g. ec.h will no longer, by default, include bn.h)
35 *) Added support for OCB mode. OpenSSL has been granted a patent license
36 compatible with the OpenSSL license for use of OCB. Details are available
37 at https://www.openssl.org/docs/misc/OCB-patent-grant-OpenSSL.pdf. Support
38 for OCB can be removed by calling config with no-ocb.
41 *) SSLv2 support has been removed. It still supports receiving a SSLv2
42 compatible client hello.
45 *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz],
46 done while fixing the error code for the key-too-small case.
47 [Annie Yousar <a.yousar@informatik.hu-berlin.de>]
49 *) CA.sh has been removmed; use CA.pl instead.
52 *) Removed old DES API.
55 *) Remove various unsupported platforms:
61 Sinix/ReliantUNIX RM400
66 16-bit platforms such as WIN16
69 *) Clean up OPENSSL_NO_xxx #define's
70 Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF
71 Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx
72 OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC
73 OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160
74 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO
75 Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY
76 OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP
77 OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK
78 OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY
79 Remove MS_STATIC; it's a relic from platforms <32 bits.
82 *) Cleaned up dead code
83 Remove all but one '#ifdef undef' which is to be looked at.
86 *) Clean up calling of xxx_free routines.
87 Just like free(), fix most of the xxx_free routines to accept
88 NULL. Remove the non-null checks from callers. Save much code.
91 *) Experimental support for a new, fast, unbiased prime candidate generator,
92 bn_probable_prime_dh_coprime(). Not currently used by any prime generator.
93 [Felix Laurie von Massenbach <felix@erbridge.co.uk>]
95 *) New output format NSS in the sess_id command line tool. This allows
96 exporting the session id and the master key in NSS keylog format.
97 [Martin Kaiser <martin@kaiser.cx>]
99 *) Harmonize version and its documentation. -f flag is used to display
101 [mancha <mancha1@zoho.com>]
103 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
105 [mancha <mancha1@zoho.com>]
107 *) Fix some double frees. These are not thought to be exploitable.
108 [mancha <mancha1@zoho.com>]
110 *) A missing bounds check in the handling of the TLS heartbeat extension
111 can be used to reveal up to 64k of memory to a connected client or
114 Thanks for Neel Mehta of Google Security for discovering this bug and to
115 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
116 preparing the fix (CVE-2014-0160)
117 [Adam Langley, Bodo Moeller]
119 *) Fix for the attack described in the paper "Recovering OpenSSL
120 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
121 by Yuval Yarom and Naomi Benger. Details can be obtained from:
122 http://eprint.iacr.org/2014/140
124 Thanks to Yuval Yarom and Naomi Benger for discovering this
125 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
126 [Yuval Yarom and Naomi Benger]
128 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
129 this fixes a limitation in previous versions of OpenSSL.
132 *) Experimental encrypt-then-mac support.
134 Experimental support for encrypt then mac from
135 draft-gutmann-tls-encrypt-then-mac-02.txt
137 To enable it set the appropriate extension number (0x42 for the test
138 server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42
140 For non-compliant peers (i.e. just about everything) this should have no
143 WARNING: EXPERIMENTAL, SUBJECT TO CHANGE.
147 *) Add EVP support for key wrapping algorithms, to avoid problems with
148 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
149 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
150 algorithms and include tests cases.
153 *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for
157 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
158 MGF1 digest and OAEP label.
161 *) Make openssl verify return errors.
162 [Chris Palmer <palmer@google.com> and Ben Laurie]
164 *) New function ASN1_TIME_diff to calculate the difference between two
165 ASN1_TIME structures or one structure and the current time.
168 *) Update fips_test_suite to support multiple command line options. New
169 test to induce all self test errors in sequence and check expected
173 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
174 sign or verify all in one operation.
177 *) Add fips_algvs: a multicall fips utility incorporating all the algorithm
178 test programs and fips_test_suite. Includes functionality to parse
179 the minimal script output of fipsalgest.pl directly.
182 *) Add authorisation parameter to FIPS_module_mode_set().
185 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
188 *) Use separate DRBG fields for internal and external flags. New function
189 FIPS_drbg_health_check() to perform on demand health checking. Add
190 generation tests to fips_test_suite with reduced health check interval to
191 demonstrate periodic health checking. Add "nodh" option to
192 fips_test_suite to skip very slow DH test.
195 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
199 *) More extensive health check for DRBG checking many more failure modes.
200 New function FIPS_selftest_drbg_all() to handle every possible DRBG
201 combination: call this in fips_test_suite.
204 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
205 and POST to handle Dual EC cases.
208 *) Add support for canonical generation of DSA parameter 'g'. See
211 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
212 POST to handle HMAC cases.
215 *) Add functions FIPS_module_version() and FIPS_module_version_text()
216 to return numerical and string versions of the FIPS module number.
219 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
220 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented
221 outside the validated module in the FIPS capable OpenSSL.
224 *) Minor change to DRBG entropy callback semantics. In some cases
225 there is no multiple of the block length between min_len and
226 max_len. Allow the callback to return more than max_len bytes
227 of entropy but discard any extra: it is the callback's responsibility
228 to ensure that the extra data discarded does not impact the
229 requested amount of entropy.
232 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
233 information in FIPS186-3, SP800-57 and SP800-131A.
236 *) CCM support via EVP. Interface is very similar to GCM case except we
237 must supply all data in one chunk (i.e. no update, final) and the
238 message length must be supplied if AAD is used. Add algorithm test
242 *) Initial version of POST overhaul. Add POST callback to allow the status
243 of POST to be monitored and/or failures induced. Modify fips_test_suite
244 to use callback. Always run all selftests even if one fails.
247 *) XTS support including algorithm test driver in the fips_gcmtest program.
248 Note: this does increase the maximum key length from 32 to 64 bytes but
249 there should be no binary compatibility issues as existing applications
250 will never use XTS mode.
253 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
254 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
255 performs algorithm blocking for unapproved PRNG types. Also do not
256 set PRNG type in FIPS_mode_set(): leave this to the application.
257 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
258 the standard OpenSSL PRNG: set additional data to a date time vector.
261 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
262 This shouldn't present any incompatibility problems because applications
263 shouldn't be using these directly and any that are will need to rethink
264 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
267 *) Extensive self tests and health checking required by SP800-90 DRBG.
268 Remove strength parameter from FIPS_drbg_instantiate and always
269 instantiate at maximum supported strength.
272 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
275 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
278 *) New function DH_compute_key_padded() to compute a DH key and pad with
279 leading zeroes if needed: this complies with SP800-56A et al.
282 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
283 anything, incomplete, subject to change and largely untested at present.
286 *) Modify fipscanisteronly build option to only build the necessary object
287 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
290 *) Add experimental option FIPSSYMS to give all symbols in
291 fipscanister.o and FIPS or fips prefix. This will avoid
292 conflicts with future versions of OpenSSL. Add perl script
293 util/fipsas.pl to preprocess assembly language source files
294 and rename any affected symbols.
297 *) Add selftest checks and algorithm block of non-fips algorithms in
298 FIPS mode. Remove DES2 from selftests.
301 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
302 return internal method without any ENGINE dependencies. Add new
303 tiny fips sign and verify functions.
306 *) New build option no-ec2m to disable characteristic 2 code.
309 *) New build option "fipscanisteronly". This only builds fipscanister.o
310 and (currently) associated fips utilities. Uses the file Makefile.fips
311 instead of Makefile.org as the prototype.
314 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
315 Update fips_gcmtest to use IV generator.
318 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
319 setting output buffer to NULL. The *Final function must be
320 called although it will not retrieve any additional data. The tag
321 can be set or retrieved with a ctrl. The IV length is by default 12
322 bytes (96 bits) but can be set to an alternative value. If the IV
323 length exceeds the maximum IV length (currently 16 bytes) it cannot be
327 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
328 underlying do_cipher function handles all cipher semantics itself
329 including padding and finalisation. This is useful if (for example)
330 an ENGINE cipher handles block padding itself. The behaviour of
331 do_cipher is subtly changed if this flag is set: the return value
332 is the number of characters written to the output buffer (zero is
333 no longer an error code) or a negative error code. Also if the
334 input buffer is NULL and length 0 finalisation should be performed.
337 *) If a candidate issuer certificate is already part of the constructed
338 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
341 *) Improve forward-security support: add functions
343 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
344 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
346 for use by SSL/TLS servers; the callback function will be called whenever a
347 new session is created, and gets to decide whether the session may be
348 cached to make it resumable (return 0) or not (return 1). (As by the
349 SSL/TLS protocol specifications, the session_id sent by the server will be
350 empty to indicate that the session is not resumable; also, the server will
351 not generate RFC 4507 (RFC 5077) session tickets.)
353 A simple reasonable callback implementation is to return is_forward_secure.
354 This parameter will be set to 1 or 0 depending on the ciphersuite selected
355 by the SSL/TLS server library, indicating whether it can provide forward
357 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
359 *) New -verify_name option in command line utilities to set verification
363 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
364 Add CMAC pkey methods.
367 *) Experimental renegotiation in s_server -www mode. If the client
368 browses /reneg connection is renegotiated. If /renegcert it is
369 renegotiated requesting a certificate.
372 *) Add an "external" session cache for debugging purposes to s_server. This
373 should help trace issues which normally are only apparent in deployed
374 multi-process servers.
377 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
378 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
379 BIO_set_cipher() and some obscure PEM functions were changed so they
380 can now return an error. The RAND changes required a change to the
381 RAND_METHOD structure.
384 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
385 a gcc attribute to warn if the result of a function is ignored. This
386 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
387 whose return value is often ignored.
390 Changes between 1.0.2 and 1.0.2a [xx XXX xxxx]
392 *) ClientHello sigalgs DoS fix
394 If a client connects to an OpenSSL 1.0.2 server and renegotiates with an
395 invalid signature algorithms extension a NULL pointer dereference will
396 occur. This can be exploited in a DoS attack against the server.
398 This issue was was reported to OpenSSL by David Ramos of Stanford
401 [Stephen Henson and Matt Caswell]
403 *) Multiblock corrupted pointer fix
405 OpenSSL 1.0.2 introduced the "multiblock" performance improvement. This
406 feature only applies on 64 bit x86 architecture platforms that support AES
407 NI instructions. A defect in the implementation of "multiblock" can cause
408 OpenSSL's internal write buffer to become incorrectly set to NULL when
409 using non-blocking IO. Typically, when the user application is using a
410 socket BIO for writing, this will only result in a failed connection.
411 However if some other BIO is used then it is likely that a segmentation
412 fault will be triggered, thus enabling a potential DoS attack.
414 This issue was reported to OpenSSL by Daniel Danner and Rainer Mueller.
418 *) Segmentation fault in DTLSv1_listen fix
420 The DTLSv1_listen function is intended to be stateless and processes the
421 initial ClientHello from many peers. It is common for user code to loop
422 over the call to DTLSv1_listen until a valid ClientHello is received with
423 an associated cookie. A defect in the implementation of DTLSv1_listen means
424 that state is preserved in the SSL object from one invocation to the next
425 that can lead to a segmentation fault. Errors processing the initial
426 ClientHello can trigger this scenario. An example of such an error could be
427 that a DTLS1.0 only client is attempting to connect to a DTLS1.2 only
430 This issue was reported to OpenSSL by Per Allansson.
434 *) Segmentation fault in ASN1_TYPE_cmp fix
436 The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is
437 made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check
438 certificate signature algorithm consistency this can be used to crash any
439 certificate verification operation and exploited in a DoS attack. Any
440 application which performs certificate verification is vulnerable including
441 OpenSSL clients and servers which enable client authentication.
445 *) Segmentation fault for invalid PSS parameters fix
447 The signature verification routines will crash with a NULL pointer
448 dereference if presented with an ASN.1 signature using the RSA PSS
449 algorithm and invalid parameters. Since these routines are used to verify
450 certificate signature algorithms this can be used to crash any
451 certificate verification operation and exploited in a DoS attack. Any
452 application which performs certificate verification is vulnerable including
453 OpenSSL clients and servers which enable client authentication.
455 This issue was was reported to OpenSSL by Brian Carpenter.
459 *) ASN.1 structure reuse memory corruption fix
461 Reusing a structure in ASN.1 parsing may allow an attacker to cause
462 memory corruption via an invalid write. Such reuse is and has been
463 strongly discouraged and is believed to be rare.
465 Applications that parse structures containing CHOICE or ANY DEFINED BY
466 components may be affected. Certificate parsing (d2i_X509 and related
467 functions) are however not affected. OpenSSL clients and servers are
472 *) PKCS7 NULL pointer dereferences fix
474 The PKCS#7 parsing code does not handle missing outer ContentInfo
475 correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with
476 missing content and trigger a NULL pointer dereference on parsing.
478 Applications that verify PKCS#7 signatures, decrypt PKCS#7 data or
479 otherwise parse PKCS#7 structures from untrusted sources are
480 affected. OpenSSL clients and servers are not affected.
482 This issue was reported to OpenSSL by Michal Zalewski (Google).
486 *) DoS via reachable assert in SSLv2 servers fix
488 A malicious client can trigger an OPENSSL_assert (i.e., an abort) in
489 servers that both support SSLv2 and enable export cipher suites by sending
490 a specially crafted SSLv2 CLIENT-MASTER-KEY message.
492 This issue was discovered by Sean Burford (Google) and Emilia Käsper
493 (OpenSSL development team).
497 *) Empty CKE with client auth and DHE fix
499 If client auth is used then a server can seg fault in the event of a DHE
500 ciphersuite being selected and a zero length ClientKeyExchange message
501 being sent by the client. This could be exploited in a DoS attack.
505 *) Handshake with unseeded PRNG fix
507 Under certain conditions an OpenSSL 1.0.2 client can complete a handshake
508 with an unseeded PRNG. The conditions are:
509 - The client is on a platform where the PRNG has not been seeded
510 automatically, and the user has not seeded manually
511 - A protocol specific client method version has been used (i.e. not
512 SSL_client_methodv23)
513 - A ciphersuite is used that does not require additional random data from
514 the PRNG beyond the initial ClientHello client random (e.g. PSK-RC4-SHA).
516 If the handshake succeeds then the client random that has been used will
517 have been generated from a PRNG with insufficient entropy and therefore the
518 output may be predictable.
520 For example using the following command with an unseeded openssl will
521 succeed on an unpatched platform:
523 openssl s_client -psk 1a2b3c4d -tls1_2 -cipher PSK-RC4-SHA
527 *) Use After Free following d2i_ECPrivatekey error fix
529 A malformed EC private key file consumed via the d2i_ECPrivateKey function
530 could cause a use after free condition. This, in turn, could cause a double
531 free in several private key parsing functions (such as d2i_PrivateKey
532 or EVP_PKCS82PKEY) and could lead to a DoS attack or memory corruption
533 for applications that receive EC private keys from untrusted
534 sources. This scenario is considered rare.
536 This issue was discovered by the BoringSSL project and fixed in their
541 *) X509_to_X509_REQ NULL pointer deref fix
543 The function X509_to_X509_REQ will crash with a NULL pointer dereference if
544 the certificate key is invalid. This function is rarely used in practice.
546 This issue was discovered by Brian Carpenter.
550 *) Removed the export ciphers from the DEFAULT ciphers
553 Changes between 1.0.1l and 1.0.2 [22 Jan 2015]
555 *) Facilitate "universal" ARM builds targeting range of ARM ISAs, e.g.
556 ARMv5 through ARMv8, as opposite to "locking" it to single one.
557 So far those who have to target multiple plaforms would compromise
558 and argue that binary targeting say ARMv5 would still execute on
559 ARMv8. "Universal" build resolves this compromise by providing
560 near-optimal performance even on newer platforms.
563 *) Accelerated NIST P-256 elliptic curve implementation for x86_64
564 (other platforms pending).
565 [Shay Gueron & Vlad Krasnov (Intel Corp), Andy Polyakov]
567 *) Add support for the SignedCertificateTimestampList certificate and
568 OCSP response extensions from RFC6962.
571 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
572 for corner cases. (Certain input points at infinity could lead to
573 bogus results, with non-infinity inputs mapped to infinity too.)
576 *) Initial support for PowerISA 2.0.7, first implemented in POWER8.
577 This covers AES, SHA256/512 and GHASH. "Initial" means that most
578 common cases are optimized and there still is room for further
579 improvements. Vector Permutation AES for Altivec is also added.
582 *) Add support for little-endian ppc64 Linux target.
583 [Marcelo Cerri (IBM)]
585 *) Initial support for AMRv8 ISA crypto extensions. This covers AES,
586 SHA1, SHA256 and GHASH. "Initial" means that most common cases
587 are optimized and there still is room for further improvements.
588 Both 32- and 64-bit modes are supported.
589 [Andy Polyakov, Ard Biesheuvel (Linaro)]
591 *) Improved ARMv7 NEON support.
594 *) Support for SPARC Architecture 2011 crypto extensions, first
595 implemented in SPARC T4. This covers AES, DES, Camellia, SHA1,
596 SHA256/512, MD5, GHASH and modular exponentiation.
597 [Andy Polyakov, David Miller]
599 *) Accelerated modular exponentiation for Intel processors, a.k.a.
601 [Shay Gueron & Vlad Krasnov (Intel Corp)]
603 *) Support for new and upcoming Intel processors, including AVX2,
604 BMI and SHA ISA extensions. This includes additional "stitched"
605 implementations, AESNI-SHA256 and GCM, and multi-buffer support
608 This work was sponsored by Intel Corp.
611 *) Support for DTLS 1.2. This adds two sets of DTLS methods: DTLS_*_method()
612 supports both DTLS 1.2 and 1.0 and should use whatever version the peer
613 supports and DTLSv1_2_*_method() which supports DTLS 1.2 only.
616 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
617 this fixes a limiation in previous versions of OpenSSL.
620 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
621 MGF1 digest and OAEP label.
624 *) Add EVP support for key wrapping algorithms, to avoid problems with
625 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
626 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
627 algorithms and include tests cases.
630 *) Add functions to allocate and set the fields of an ECDSA_METHOD
632 [Douglas E. Engert, Steve Henson]
634 *) New functions OPENSSL_gmtime_diff and ASN1_TIME_diff to find the
635 difference in days and seconds between two tm or ASN1_TIME structures.
638 *) Add -rev test option to s_server to just reverse order of characters
639 received by client and send back to server. Also prints an abbreviated
640 summary of the connection parameters.
643 *) New option -brief for s_client and s_server to print out a brief summary
644 of connection parameters.
647 *) Add callbacks for arbitrary TLS extensions.
648 [Trevor Perrin <trevp@trevp.net> and Ben Laurie]
650 *) New option -crl_download in several openssl utilities to download CRLs
651 from CRLDP extension in certificates.
654 *) New options -CRL and -CRLform for s_client and s_server for CRLs.
657 *) New function X509_CRL_diff to generate a delta CRL from the difference
658 of two full CRLs. Add support to "crl" utility.
661 *) New functions to set lookup_crls function and to retrieve
662 X509_STORE from X509_STORE_CTX.
665 *) Print out deprecated issuer and subject unique ID fields in
669 *) Extend OCSP I/O functions so they can be used for simple general purpose
670 HTTP as well as OCSP. New wrapper function which can be used to download
671 CRLs using the OCSP API.
674 *) Delegate command line handling in s_client/s_server to SSL_CONF APIs.
677 *) SSL_CONF* functions. These provide a common framework for application
678 configuration using configuration files or command lines.
681 *) SSL/TLS tracing code. This parses out SSL/TLS records using the
682 message callback and prints the results. Needs compile time option
683 "enable-ssl-trace". New options to s_client and s_server to enable
687 *) New ctrl and macro to retrieve supported points extensions.
688 Print out extension in s_server and s_client.
691 *) New functions to retrieve certificate signature and signature
695 *) Add functions to retrieve and manipulate the raw cipherlist sent by a
699 *) New Suite B modes for TLS code. These use and enforce the requirements
700 of RFC6460: restrict ciphersuites, only permit Suite B algorithms and
701 only use Suite B curves. The Suite B modes can be set by using the
702 strings "SUITEB128", "SUITEB192" or "SUITEB128ONLY" for the cipherstring.
705 *) New chain verification flags for Suite B levels of security. Check
706 algorithms are acceptable when flags are set in X509_verify_cert.
709 *) Make tls1_check_chain return a set of flags indicating checks passed
710 by a certificate chain. Add additional tests to handle client
711 certificates: checks for matching certificate type and issuer name
715 *) If an attempt is made to use a signature algorithm not in the peer
716 preference list abort the handshake. If client has no suitable
717 signature algorithms in response to a certificate request do not
721 *) If server EC tmp key is not in client preference list abort handshake.
724 *) Add support for certificate stores in CERT structure. This makes it
725 possible to have different stores per SSL structure or one store in
726 the parent SSL_CTX. Include distint stores for certificate chain
727 verification and chain building. New ctrl SSL_CTRL_BUILD_CERT_CHAIN
728 to build and store a certificate chain in CERT structure: returing
729 an error if the chain cannot be built: this will allow applications
730 to test if a chain is correctly configured.
732 Note: if the CERT based stores are not set then the parent SSL_CTX
733 store is used to retain compatibility with existing behaviour.
737 *) New function ssl_set_client_disabled to set a ciphersuite disabled
738 mask based on the current session, check mask when sending client
739 hello and checking the requested ciphersuite.
742 *) New ctrls to retrieve and set certificate types in a certificate
743 request message. Print out received values in s_client. If certificate
744 types is not set with custom values set sensible values based on
745 supported signature algorithms.
748 *) Support for distinct client and server supported signature algorithms.
751 *) Add certificate callback. If set this is called whenever a certificate
752 is required by client or server. An application can decide which
753 certificate chain to present based on arbitrary criteria: for example
754 supported signature algorithms. Add very simple example to s_server.
755 This fixes many of the problems and restrictions of the existing client
756 certificate callback: for example you can now clear an existing
757 certificate and specify the whole chain.
760 *) Add new "valid_flags" field to CERT_PKEY structure which determines what
761 the certificate can be used for (if anything). Set valid_flags field
762 in new tls1_check_chain function. Simplify ssl_set_cert_masks which used
763 to have similar checks in it.
765 Add new "cert_flags" field to CERT structure and include a "strict mode".
766 This enforces some TLS certificate requirements (such as only permitting
767 certificate signature algorithms contained in the supported algorithms
768 extension) which some implementations ignore: this option should be used
769 with caution as it could cause interoperability issues.
772 *) Update and tidy signature algorithm extension processing. Work out
773 shared signature algorithms based on preferences and peer algorithms
774 and print them out in s_client and s_server. Abort handshake if no
775 shared signature algorithms.
778 *) Add new functions to allow customised supported signature algorithms
779 for SSL and SSL_CTX structures. Add options to s_client and s_server
783 *) New function SSL_certs_clear() to delete all references to certificates
784 from an SSL structure. Before this once a certificate had been added
785 it couldn't be removed.
788 *) Integrate hostname, email address and IP address checking with certificate
789 verification. New verify options supporting checking in opensl utility.
792 *) Fixes and wildcard matching support to hostname and email checking
793 functions. Add manual page.
794 [Florian Weimer (Red Hat Product Security Team)]
796 *) New functions to check a hostname email or IP address against a
797 certificate. Add options x509 utility to print results of checks against
801 *) Fix OCSP checking.
802 [Rob Stradling <rob.stradling@comodo.com> and Ben Laurie]
804 *) Initial experimental support for explicitly trusted non-root CAs.
805 OpenSSL still tries to build a complete chain to a root but if an
806 intermediate CA has a trust setting included that is used. The first
807 setting is used: whether to trust (e.g., -addtrust option to the x509
811 *) Add -trusted_first option which attempts to find certificates in the
812 trusted store even if an untrusted chain is also supplied.
815 *) MIPS assembly pack updates: support for MIPS32r2 and SmartMIPS ASE,
816 platform support for Linux and Android.
819 *) Support for linux-x32, ILP32 environment in x86_64 framework.
822 *) Experimental multi-implementation support for FIPS capable OpenSSL.
823 When in FIPS mode the approved implementations are used as normal,
824 when not in FIPS mode the internal unapproved versions are used instead.
825 This means that the FIPS capable OpenSSL isn't forced to use the
826 (often lower performance) FIPS implementations outside FIPS mode.
829 *) Transparently support X9.42 DH parameters when calling
830 PEM_read_bio_DHparameters. This means existing applications can handle
831 the new parameter format automatically.
834 *) Initial experimental support for X9.42 DH parameter format: mainly
835 to support use of 'q' parameter for RFC5114 parameters.
838 *) Add DH parameters from RFC5114 including test data to dhtest.
841 *) Support for automatic EC temporary key parameter selection. If enabled
842 the most preferred EC parameters are automatically used instead of
843 hardcoded fixed parameters. Now a server just has to call:
844 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
845 support ECDH and use the most appropriate parameters.
848 *) Enhance and tidy EC curve and point format TLS extension code. Use
849 static structures instead of allocation if default values are used.
850 New ctrls to set curves we wish to support and to retrieve shared curves.
851 Print out shared curves in s_server. New options to s_server and s_client
852 to set list of supported curves.
855 *) New ctrls to retrieve supported signature algorithms and
856 supported curve values as an array of NIDs. Extend openssl utility
857 to print out received values.
860 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
861 between NIDs and the more common NIST names such as "P-256". Enhance
862 ecparam utility and ECC method to recognise the NIST names for curves.
865 *) Enhance SSL/TLS certificate chain handling to support different
866 chains for each certificate instead of one chain in the parent SSL_CTX.
869 *) Support for fixed DH ciphersuite client authentication: where both
870 server and client use DH certificates with common parameters.
873 *) Support for fixed DH ciphersuites: those requiring DH server
877 *) New function i2d_re_X509_tbs for re-encoding the TBS portion of
879 Note: Related 1.0.2-beta specific macros X509_get_cert_info,
880 X509_CINF_set_modified, X509_CINF_get_issuer, X509_CINF_get_extensions and
881 X509_CINF_get_signature were reverted post internal team review.
883 Changes between 1.0.1k and 1.0.1l [15 Jan 2015]
885 *) Build fixes for the Windows and OpenVMS platforms
886 [Matt Caswell and Richard Levitte]
888 Changes between 1.0.1j and 1.0.1k [8 Jan 2015]
890 *) Fix DTLS segmentation fault in dtls1_get_record. A carefully crafted DTLS
891 message can cause a segmentation fault in OpenSSL due to a NULL pointer
892 dereference. This could lead to a Denial Of Service attack. Thanks to
893 Markus Stenberg of Cisco Systems, Inc. for reporting this issue.
897 *) Fix DTLS memory leak in dtls1_buffer_record. A memory leak can occur in the
898 dtls1_buffer_record function under certain conditions. In particular this
899 could occur if an attacker sent repeated DTLS records with the same
900 sequence number but for the next epoch. The memory leak could be exploited
901 by an attacker in a Denial of Service attack through memory exhaustion.
902 Thanks to Chris Mueller for reporting this issue.
906 *) Fix issue where no-ssl3 configuration sets method to NULL. When openssl is
907 built with the no-ssl3 option and a SSL v3 ClientHello is received the ssl
908 method would be set to NULL which could later result in a NULL pointer
909 dereference. Thanks to Frank Schmirler for reporting this issue.
913 *) Abort handshake if server key exchange message is omitted for ephemeral
916 Thanks to Karthikeyan Bhargavan of the PROSECCO team at INRIA for
917 reporting this issue.
921 *) Remove non-export ephemeral RSA code on client and server. This code
922 violated the TLS standard by allowing the use of temporary RSA keys in
923 non-export ciphersuites and could be used by a server to effectively
924 downgrade the RSA key length used to a value smaller than the server
925 certificate. Thanks for Karthikeyan Bhargavan of the PROSECCO team at
926 INRIA or reporting this issue.
930 *) Fixed issue where DH client certificates are accepted without verification.
931 An OpenSSL server will accept a DH certificate for client authentication
932 without the certificate verify message. This effectively allows a client to
933 authenticate without the use of a private key. This only affects servers
934 which trust a client certificate authority which issues certificates
935 containing DH keys: these are extremely rare and hardly ever encountered.
936 Thanks for Karthikeyan Bhargavan of the PROSECCO team at INRIA or reporting
941 *) Ensure that the session ID context of an SSL is updated when its
942 SSL_CTX is updated via SSL_set_SSL_CTX.
944 The session ID context is typically set from the parent SSL_CTX,
945 and can vary with the CTX.
948 *) Fix various certificate fingerprint issues.
950 By using non-DER or invalid encodings outside the signed portion of a
951 certificate the fingerprint can be changed without breaking the signature.
952 Although no details of the signed portion of the certificate can be changed
953 this can cause problems with some applications: e.g. those using the
954 certificate fingerprint for blacklists.
956 1. Reject signatures with non zero unused bits.
958 If the BIT STRING containing the signature has non zero unused bits reject
959 the signature. All current signature algorithms require zero unused bits.
961 2. Check certificate algorithm consistency.
963 Check the AlgorithmIdentifier inside TBS matches the one in the
964 certificate signature. NB: this will result in signature failure
965 errors for some broken certificates.
967 Thanks to Konrad Kraszewski from Google for reporting this issue.
969 3. Check DSA/ECDSA signatures use DER.
971 Reencode DSA/ECDSA signatures and compare with the original received
972 signature. Return an error if there is a mismatch.
974 This will reject various cases including garbage after signature
975 (thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
976 program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
977 (negative or with leading zeroes).
979 Further analysis was conducted and fixes were developed by Stephen Henson
980 of the OpenSSL core team.
985 *) Correct Bignum squaring. Bignum squaring (BN_sqr) may produce incorrect
986 results on some platforms, including x86_64. This bug occurs at random
987 with a very low probability, and is not known to be exploitable in any
988 way, though its exact impact is difficult to determine. Thanks to Pieter
989 Wuille (Blockstream) who reported this issue and also suggested an initial
990 fix. Further analysis was conducted by the OpenSSL development team and
991 Adam Langley of Google. The final fix was developed by Andy Polyakov of
992 the OpenSSL core team.
996 *) Do not resume sessions on the server if the negotiated protocol
997 version does not match the session's version. Resuming with a different
998 version, while not strictly forbidden by the RFC, is of questionable
999 sanity and breaks all known clients.
1000 [David Benjamin, Emilia Käsper]
1002 *) Tighten handling of the ChangeCipherSpec (CCS) message: reject
1003 early CCS messages during renegotiation. (Note that because
1004 renegotiation is encrypted, this early CCS was not exploitable.)
1007 *) Tighten client-side session ticket handling during renegotiation:
1008 ensure that the client only accepts a session ticket if the server sends
1009 the extension anew in the ServerHello. Previously, a TLS client would
1010 reuse the old extension state and thus accept a session ticket if one was
1011 announced in the initial ServerHello.
1013 Similarly, ensure that the client requires a session ticket if one
1014 was advertised in the ServerHello. Previously, a TLS client would
1015 ignore a missing NewSessionTicket message.
1018 Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
1020 *) SRTP Memory Leak.
1022 A flaw in the DTLS SRTP extension parsing code allows an attacker, who
1023 sends a carefully crafted handshake message, to cause OpenSSL to fail
1024 to free up to 64k of memory causing a memory leak. This could be
1025 exploited in a Denial Of Service attack. This issue affects OpenSSL
1026 1.0.1 server implementations for both SSL/TLS and DTLS regardless of
1027 whether SRTP is used or configured. Implementations of OpenSSL that
1028 have been compiled with OPENSSL_NO_SRTP defined are not affected.
1030 The fix was developed by the OpenSSL team.
1034 *) Session Ticket Memory Leak.
1036 When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
1037 integrity of that ticket is first verified. In the event of a session
1038 ticket integrity check failing, OpenSSL will fail to free memory
1039 causing a memory leak. By sending a large number of invalid session
1040 tickets an attacker could exploit this issue in a Denial Of Service
1045 *) Build option no-ssl3 is incomplete.
1047 When OpenSSL is configured with "no-ssl3" as a build option, servers
1048 could accept and complete a SSL 3.0 handshake, and clients could be
1049 configured to send them.
1051 [Akamai and the OpenSSL team]
1053 *) Add support for TLS_FALLBACK_SCSV.
1054 Client applications doing fallback retries should call
1055 SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
1057 [Adam Langley, Bodo Moeller]
1059 *) Add additional DigestInfo checks.
1061 Reencode DigestInto in DER and check against the original when
1062 verifying RSA signature: this will reject any improperly encoded
1063 DigestInfo structures.
1065 Note: this is a precautionary measure and no attacks are currently known.
1069 Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
1071 *) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
1072 SRP code can be overrun an internal buffer. Add sanity check that
1073 g, A, B < N to SRP code.
1075 Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
1076 Group for discovering this issue.
1080 *) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
1081 TLS 1.0 instead of higher protocol versions when the ClientHello message
1082 is badly fragmented. This allows a man-in-the-middle attacker to force a
1083 downgrade to TLS 1.0 even if both the server and the client support a
1084 higher protocol version, by modifying the client's TLS records.
1086 Thanks to David Benjamin and Adam Langley (Google) for discovering and
1087 researching this issue.
1091 *) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
1092 to a denial of service attack. A malicious server can crash the client
1093 with a null pointer dereference (read) by specifying an anonymous (EC)DH
1094 ciphersuite and sending carefully crafted handshake messages.
1096 Thanks to Felix Gröbert (Google) for discovering and researching this
1101 *) By sending carefully crafted DTLS packets an attacker could cause openssl
1102 to leak memory. This can be exploited through a Denial of Service attack.
1103 Thanks to Adam Langley for discovering and researching this issue.
1107 *) An attacker can force openssl to consume large amounts of memory whilst
1108 processing DTLS handshake messages. This can be exploited through a
1109 Denial of Service attack.
1110 Thanks to Adam Langley for discovering and researching this issue.
1114 *) An attacker can force an error condition which causes openssl to crash
1115 whilst processing DTLS packets due to memory being freed twice. This
1116 can be exploited through a Denial of Service attack.
1117 Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
1122 *) If a multithreaded client connects to a malicious server using a resumed
1123 session and the server sends an ec point format extension it could write
1124 up to 255 bytes to freed memory.
1126 Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
1131 *) A malicious server can crash an OpenSSL client with a null pointer
1132 dereference (read) by specifying an SRP ciphersuite even though it was not
1133 properly negotiated with the client. This can be exploited through a
1134 Denial of Service attack.
1136 Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
1137 discovering and researching this issue.
1141 *) A flaw in OBJ_obj2txt may cause pretty printing functions such as
1142 X509_name_oneline, X509_name_print_ex et al. to leak some information
1143 from the stack. Applications may be affected if they echo pretty printing
1144 output to the attacker.
1146 Thanks to Ivan Fratric (Google) for discovering this issue.
1148 [Emilia Käsper, and Steve Henson]
1150 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
1151 for corner cases. (Certain input points at infinity could lead to
1152 bogus results, with non-infinity inputs mapped to infinity too.)
1155 Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
1157 *) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
1158 handshake can force the use of weak keying material in OpenSSL
1159 SSL/TLS clients and servers.
1161 Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
1162 researching this issue. (CVE-2014-0224)
1163 [KIKUCHI Masashi, Steve Henson]
1165 *) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
1166 OpenSSL DTLS client the code can be made to recurse eventually crashing
1169 Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
1171 [Imre Rad, Steve Henson]
1173 *) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
1174 be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
1175 client or server. This is potentially exploitable to run arbitrary
1176 code on a vulnerable client or server.
1178 Thanks to Jüri Aedla for reporting this issue. (CVE-2014-0195)
1179 [Jüri Aedla, Steve Henson]
1181 *) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
1182 are subject to a denial of service attack.
1184 Thanks to Felix Gröbert and Ivan Fratric at Google for discovering
1185 this issue. (CVE-2014-3470)
1186 [Felix Gröbert, Ivan Fratric, Steve Henson]
1188 *) Harmonize version and its documentation. -f flag is used to display
1190 [mancha <mancha1@zoho.com>]
1192 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
1193 in i2d_ECPrivateKey.
1194 [mancha <mancha1@zoho.com>]
1196 *) Fix some double frees. These are not thought to be exploitable.
1197 [mancha <mancha1@zoho.com>]
1199 Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
1201 *) A missing bounds check in the handling of the TLS heartbeat extension
1202 can be used to reveal up to 64k of memory to a connected client or
1205 Thanks for Neel Mehta of Google Security for discovering this bug and to
1206 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
1207 preparing the fix (CVE-2014-0160)
1208 [Adam Langley, Bodo Moeller]
1210 *) Fix for the attack described in the paper "Recovering OpenSSL
1211 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
1212 by Yuval Yarom and Naomi Benger. Details can be obtained from:
1213 http://eprint.iacr.org/2014/140
1215 Thanks to Yuval Yarom and Naomi Benger for discovering this
1216 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
1217 [Yuval Yarom and Naomi Benger]
1219 *) TLS pad extension: draft-agl-tls-padding-03
1221 Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
1222 TLS client Hello record length value would otherwise be > 255 and
1223 less that 512 pad with a dummy extension containing zeroes so it
1224 is at least 512 bytes long.
1226 [Adam Langley, Steve Henson]
1228 Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
1230 *) Fix for TLS record tampering bug. A carefully crafted invalid
1231 handshake could crash OpenSSL with a NULL pointer exception.
1232 Thanks to Anton Johansson for reporting this issues.
1235 *) Keep original DTLS digest and encryption contexts in retransmission
1236 structures so we can use the previous session parameters if they need
1237 to be resent. (CVE-2013-6450)
1240 *) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
1241 avoids preferring ECDHE-ECDSA ciphers when the client appears to be
1242 Safari on OS X. Safari on OS X 10.8..10.8.3 advertises support for
1243 several ECDHE-ECDSA ciphers, but fails to negotiate them. The bug
1244 is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
1245 10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
1246 [Rob Stradling, Adam Langley]
1248 Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
1250 *) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
1251 supporting platforms or when small records were transferred.
1252 [Andy Polyakov, Steve Henson]
1254 Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
1256 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
1258 This addresses the flaw in CBC record processing discovered by
1259 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
1260 at: http://www.isg.rhul.ac.uk/tls/
1262 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1263 Security Group at Royal Holloway, University of London
1264 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
1265 Emilia Käsper for the initial patch.
1267 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
1269 *) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
1270 ciphersuites which can be exploited in a denial of service attack.
1271 Thanks go to and to Adam Langley <agl@chromium.org> for discovering
1272 and detecting this bug and to Wolfgang Ettlinger
1273 <wolfgang.ettlinger@gmail.com> for independently discovering this issue.
1277 *) Return an error when checking OCSP signatures when key is NULL.
1278 This fixes a DoS attack. (CVE-2013-0166)
1281 *) Make openssl verify return errors.
1282 [Chris Palmer <palmer@google.com> and Ben Laurie]
1284 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
1285 the right response is stapled. Also change SSL_get_certificate()
1286 so it returns the certificate actually sent.
1287 See http://rt.openssl.org/Ticket/Display.html?id=2836.
1288 [Rob Stradling <rob.stradling@comodo.com>]
1290 *) Fix possible deadlock when decoding public keys.
1293 *) Don't use TLS 1.0 record version number in initial client hello
1297 Changes between 1.0.1b and 1.0.1c [10 May 2012]
1299 *) Sanity check record length before skipping explicit IV in TLS
1300 1.2, 1.1 and DTLS to fix DoS attack.
1302 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
1303 fuzzing as a service testing platform.
1307 *) Initialise tkeylen properly when encrypting CMS messages.
1308 Thanks to Solar Designer of Openwall for reporting this issue.
1311 *) In FIPS mode don't try to use composite ciphers as they are not
1315 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
1317 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
1318 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
1319 mean any application compiled against OpenSSL 1.0.0 headers setting
1320 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
1321 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
1322 0x10000000L Any application which was previously compiled against
1323 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
1324 will need to be recompiled as a result. Letting be results in
1325 inability to disable specifically TLS 1.1 and in client context,
1326 in unlike event, limit maximum offered version to TLS 1.0 [see below].
1329 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
1330 disable just protocol X, but all protocols above X *if* there are
1331 protocols *below* X still enabled. In more practical terms it means
1332 that if application wants to disable TLS1.0 in favor of TLS1.1 and
1333 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
1334 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
1338 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
1340 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
1341 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
1342 in CRYPTO_realloc_clean.
1344 Thanks to Tavis Ormandy, Google Security Team, for discovering this
1345 issue and to Adam Langley <agl@chromium.org> for fixing it.
1347 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
1349 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
1352 *) Workarounds for some broken servers that "hang" if a client hello
1353 record length exceeds 255 bytes.
1355 1. Do not use record version number > TLS 1.0 in initial client
1356 hello: some (but not all) hanging servers will now work.
1357 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
1358 the number of ciphers sent in the client hello. This should be
1359 set to an even number, such as 50, for example by passing:
1360 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
1361 Most broken servers should now work.
1362 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
1363 TLS 1.2 client support entirely.
1366 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
1369 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
1371 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
1372 STRING form instead of a DigestInfo.
1375 *) The format used for MDC2 RSA signatures is inconsistent between EVP
1376 and the RSA_sign/RSA_verify functions. This was made more apparent when
1377 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
1378 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
1379 the correct format in RSA_verify so both forms transparently work.
1382 *) Some servers which support TLS 1.0 can choke if we initially indicate
1383 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
1384 encrypted premaster secret. As a workaround use the maximum permitted
1385 client version in client hello, this should keep such servers happy
1386 and still work with previous versions of OpenSSL.
1389 *) Add support for TLS/DTLS heartbeats.
1390 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1392 *) Add support for SCTP.
1393 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1395 *) Improved PRNG seeding for VOS.
1396 [Paul Green <Paul.Green@stratus.com>]
1398 *) Extensive assembler packs updates, most notably:
1400 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
1401 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
1402 - x86_64: bit-sliced AES implementation;
1403 - ARM: NEON support, contemporary platforms optimizations;
1404 - s390x: z196 support;
1405 - *: GHASH and GF(2^m) multiplication implementations;
1409 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
1410 (removal of unnecessary code)
1411 [Peter Sylvester <peter.sylvester@edelweb.fr>]
1413 *) Add TLS key material exporter from RFC 5705.
1416 *) Add DTLS-SRTP negotiation from RFC 5764.
1419 *) Add Next Protocol Negotiation,
1420 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
1421 disabled with a no-npn flag to config or Configure. Code donated
1423 [Adam Langley <agl@google.com> and Ben Laurie]
1425 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
1426 NIST-P256, NIST-P521, with constant-time single point multiplication on
1427 typical inputs. Compiler support for the nonstandard type __uint128_t is
1428 required to use this (present in gcc 4.4 and later, for 64-bit builds).
1429 Code made available under Apache License version 2.0.
1431 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
1432 line to include this in your build of OpenSSL, and run "make depend" (or
1433 "make update"). This enables the following EC_METHODs:
1435 EC_GFp_nistp224_method()
1436 EC_GFp_nistp256_method()
1437 EC_GFp_nistp521_method()
1439 EC_GROUP_new_by_curve_name() will automatically use these (while
1440 EC_GROUP_new_curve_GFp() currently prefers the more flexible
1442 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
1444 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
1445 all platforms. Move ssize_t definition from e_os.h to the public
1446 header file e_os2.h as it now appears in public header file cms.h
1449 *) New -sigopt option to the ca, req and x509 utilities. Additional
1450 signature parameters can be passed using this option and in
1454 *) Add RSA PSS signing function. This will generate and set the
1455 appropriate AlgorithmIdentifiers for PSS based on those in the
1456 corresponding EVP_MD_CTX structure. No application support yet.
1459 *) Support for companion algorithm specific ASN1 signing routines.
1460 New function ASN1_item_sign_ctx() signs a pre-initialised
1461 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
1462 the appropriate parameters.
1465 *) Add new algorithm specific ASN1 verification initialisation function
1466 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
1467 handling will be the same no matter what EVP_PKEY_METHOD is used.
1468 Add a PSS handler to support verification of PSS signatures: checked
1469 against a number of sample certificates.
1472 *) Add signature printing for PSS. Add PSS OIDs.
1473 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
1475 *) Add algorithm specific signature printing. An individual ASN1 method
1476 can now print out signatures instead of the standard hex dump.
1478 More complex signatures (e.g. PSS) can print out more meaningful
1479 information. Include DSA version that prints out the signature
1483 *) Password based recipient info support for CMS library: implementing
1487 *) Split password based encryption into PBES2 and PBKDF2 functions. This
1488 neatly separates the code into cipher and PBE sections and is required
1489 for some algorithms that split PBES2 into separate pieces (such as
1490 password based CMS).
1493 *) Session-handling fixes:
1494 - Fix handling of connections that are resuming with a session ID,
1495 but also support Session Tickets.
1496 - Fix a bug that suppressed issuing of a new ticket if the client
1497 presented a ticket with an expired session.
1498 - Try to set the ticket lifetime hint to something reasonable.
1499 - Make tickets shorter by excluding irrelevant information.
1500 - On the client side, don't ignore renewed tickets.
1501 [Adam Langley, Bodo Moeller (Google)]
1503 *) Fix PSK session representation.
1506 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
1508 This work was sponsored by Intel.
1511 *) Add GCM support to TLS library. Some custom code is needed to split
1512 the IV between the fixed (from PRF) and explicit (from TLS record)
1513 portions. This adds all GCM ciphersuites supported by RFC5288 and
1514 RFC5289. Generalise some AES* cipherstrings to include GCM and
1515 add a special AESGCM string for GCM only.
1518 *) Expand range of ctrls for AES GCM. Permit setting invocation
1519 field on decrypt and retrieval of invocation field only on encrypt.
1522 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
1523 As required by RFC5289 these ciphersuites cannot be used if for
1524 versions of TLS earlier than 1.2.
1527 *) For FIPS capable OpenSSL interpret a NULL default public key method
1528 as unset and return the appropriate default but do *not* set the default.
1529 This means we can return the appropriate method in applications that
1530 switch between FIPS and non-FIPS modes.
1533 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
1534 ENGINE is used then we cannot handle that in the FIPS module so we
1535 keep original code iff non-FIPS operations are allowed.
1538 *) Add -attime option to openssl utilities.
1539 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
1541 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
1544 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
1545 FIPS EC methods unconditionally for now.
1548 *) New build option no-ec2m to disable characteristic 2 code.
1551 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
1552 all cases can be covered as some introduce binary incompatibilities.
1555 *) Redirect RSA operations to FIPS module including keygen,
1556 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
1559 *) Add similar low level API blocking to ciphers.
1562 *) Low level digest APIs are not approved in FIPS mode: any attempt
1563 to use these will cause a fatal error. Applications that *really* want
1564 to use them can use the private_* version instead.
1567 *) Redirect cipher operations to FIPS module for FIPS builds.
1570 *) Redirect digest operations to FIPS module for FIPS builds.
1573 *) Update build system to add "fips" flag which will link in fipscanister.o
1574 for static and shared library builds embedding a signature if needed.
1577 *) Output TLS supported curves in preference order instead of numerical
1578 order. This is currently hardcoded for the highest order curves first.
1579 This should be configurable so applications can judge speed vs strength.
1582 *) Add TLS v1.2 server support for client authentication.
1585 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
1589 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
1590 FIPS modules versions.
1593 *) Add TLS v1.2 client side support for client authentication. Keep cache
1594 of handshake records longer as we don't know the hash algorithm to use
1595 until after the certificate request message is received.
1598 *) Initial TLS v1.2 client support. Add a default signature algorithms
1599 extension including all the algorithms we support. Parse new signature
1600 format in client key exchange. Relax some ECC signing restrictions for
1601 TLS v1.2 as indicated in RFC5246.
1604 *) Add server support for TLS v1.2 signature algorithms extension. Switch
1605 to new signature format when needed using client digest preference.
1606 All server ciphersuites should now work correctly in TLS v1.2. No client
1607 support yet and no support for client certificates.
1610 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
1611 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
1612 ciphersuites. At present only RSA key exchange ciphersuites work with
1613 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
1614 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
1615 and version checking.
1618 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
1619 with this defined it will not be affected by any changes to ssl internal
1620 structures. Add several utility functions to allow openssl application
1621 to work with OPENSSL_NO_SSL_INTERN defined.
1625 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
1627 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
1630 *) Permit abbreviated handshakes when renegotiating using the function
1631 SSL_renegotiate_abbreviated().
1632 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1634 *) Add call to ENGINE_register_all_complete() to
1635 ENGINE_load_builtin_engines(), so some implementations get used
1636 automatically instead of needing explicit application support.
1639 *) Add support for TLS key exporter as described in RFC5705.
1640 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
1642 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
1643 a few changes are required:
1645 Add SSL_OP_NO_TLSv1_1 flag.
1646 Add TLSv1_1 methods.
1647 Update version checking logic to handle version 1.1.
1648 Add explicit IV handling (ported from DTLS code).
1649 Add command line options to s_client/s_server.
1652 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
1654 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
1655 in CMS and PKCS7 code. When RSA decryption fails use a random key for
1656 content decryption and always return the same error. Note: this attack
1657 needs on average 2^20 messages so it only affects automated senders. The
1658 old behaviour can be reenabled in the CMS code by setting the
1659 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
1660 an MMA defence is not necessary.
1661 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
1662 this issue. (CVE-2012-0884)
1665 *) Fix CVE-2011-4619: make sure we really are receiving a
1666 client hello before rejecting multiple SGC restarts. Thanks to
1667 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
1670 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
1672 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1673 Thanks to Antonio Martin, Enterprise Secure Access Research and
1674 Development, Cisco Systems, Inc. for discovering this bug and
1675 preparing a fix. (CVE-2012-0050)
1678 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
1680 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1681 of the Vaudenay padding oracle attack on CBC mode encryption
1682 which enables an efficient plaintext recovery attack against
1683 the OpenSSL implementation of DTLS. Their attack exploits timing
1684 differences arising during decryption processing. A research
1685 paper describing this attack can be found at:
1686 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1687 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1688 Security Group at Royal Holloway, University of London
1689 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1690 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1691 for preparing the fix. (CVE-2011-4108)
1692 [Robin Seggelmann, Michael Tuexen]
1694 *) Clear bytes used for block padding of SSL 3.0 records.
1696 [Adam Langley (Google)]
1698 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1699 Kadianakis <desnacked@gmail.com> for discovering this issue and
1700 Adam Langley for preparing the fix. (CVE-2011-4619)
1701 [Adam Langley (Google)]
1703 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
1704 [Andrey Kulikov <amdeich@gmail.com>]
1706 *) Prevent malformed RFC3779 data triggering an assertion failure.
1707 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1708 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1709 [Rob Austein <sra@hactrn.net>]
1711 *) Improved PRNG seeding for VOS.
1712 [Paul Green <Paul.Green@stratus.com>]
1714 *) Fix ssl_ciph.c set-up race.
1715 [Adam Langley (Google)]
1717 *) Fix spurious failures in ecdsatest.c.
1718 [Emilia Käsper (Google)]
1720 *) Fix the BIO_f_buffer() implementation (which was mixing different
1721 interpretations of the '..._len' fields).
1722 [Adam Langley (Google)]
1724 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1725 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1726 threads won't reuse the same blinding coefficients.
1728 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1729 lock to call BN_BLINDING_invert_ex, and avoids one use of
1730 BN_BLINDING_update for each BN_BLINDING structure (previously,
1731 the last update always remained unused).
1732 [Emilia Käsper (Google)]
1734 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
1735 [Bob Buckholz (Google)]
1737 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
1739 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
1740 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
1741 [Kaspar Brand <ossl@velox.ch>]
1743 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1744 for multi-threaded use of ECDH. (CVE-2011-3210)
1745 [Adam Langley (Google)]
1747 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1750 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
1751 signature public key algorithm by using OID xref utilities instead.
1752 Before this you could only use some ECC ciphersuites with SHA1 only.
1755 *) Add protection against ECDSA timing attacks as mentioned in the paper
1756 by Billy Bob Brumley and Nicola Tuveri, see:
1758 http://eprint.iacr.org/2011/232.pdf
1760 [Billy Bob Brumley and Nicola Tuveri]
1762 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
1764 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1765 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1767 *) Fix bug in string printing code: if *any* escaping is enabled we must
1768 escape the escape character (backslash) or the resulting string is
1772 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
1774 *) Disable code workaround for ancient and obsolete Netscape browsers
1775 and servers: an attacker can use it in a ciphersuite downgrade attack.
1776 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1779 *) Fixed J-PAKE implementation error, originally discovered by
1780 Sebastien Martini, further info and confirmation from Stefan
1781 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1784 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
1786 *) Fix extension code to avoid race conditions which can result in a buffer
1787 overrun vulnerability: resumed sessions must not be modified as they can
1788 be shared by multiple threads. CVE-2010-3864
1791 *) Fix WIN32 build system to correctly link an ENGINE directory into
1795 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
1797 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
1799 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
1801 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
1803 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
1804 context. The operation can be customised via the ctrl mechanism in
1805 case ENGINEs want to include additional functionality.
1808 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
1811 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
1812 output hashes compatible with older versions of OpenSSL.
1813 [Willy Weisz <weisz@vcpc.univie.ac.at>]
1815 *) Fix compression algorithm handling: if resuming a session use the
1816 compression algorithm of the resumed session instead of determining
1817 it from client hello again. Don't allow server to change algorithm.
1820 *) Add load_crls() function to apps tidying load_certs() too. Add option
1821 to verify utility to allow additional CRLs to be included.
1824 *) Update OCSP request code to permit adding custom headers to the request:
1825 some responders need this.
1828 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
1830 [Julia Lawall <julia@diku.dk>]
1832 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
1833 needlessly dereferenced structures, used obsolete functions and
1834 didn't handle all updated verify codes correctly.
1837 *) Disable MD2 in the default configuration.
1840 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
1841 indicate the initial BIO being pushed or popped. This makes it possible
1842 to determine whether the BIO is the one explicitly called or as a result
1843 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
1844 it handles reference counts correctly and doesn't zero out the I/O bio
1845 when it is not being explicitly popped. WARNING: applications which
1846 included workarounds for the old buggy behaviour will need to be modified
1847 or they could free up already freed BIOs.
1850 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
1851 renaming to all platforms (within the 0.9.8 branch, this was
1852 done conditionally on Netware platforms to avoid a name clash).
1853 [Guenter <lists@gknw.net>]
1855 *) Add ECDHE and PSK support to DTLS.
1856 [Michael Tuexen <tuexen@fh-muenster.de>]
1858 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
1862 *) Add "missing" function EVP_MD_flags() (without this the only way to
1863 retrieve a digest flags is by accessing the structure directly. Update
1864 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
1865 or cipher is registered as in the "from" argument. Print out all
1866 registered digests in the dgst usage message instead of manually
1867 attempting to work them out.
1870 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
1871 this allows the use of compression and extensions. Change default cipher
1872 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
1873 by default unless an application cipher string requests it.
1876 *) Alter match criteria in PKCS12_parse(). It used to try to use local
1877 key ids to find matching certificates and keys but some PKCS#12 files
1878 don't follow the (somewhat unwritten) rules and this strategy fails.
1879 Now just gather all certificates together and the first private key
1880 then look for the first certificate that matches the key.
1883 *) Support use of registered digest and cipher names for dgst and cipher
1884 commands instead of having to add each one as a special case. So now
1891 openssl dgst -sha256 foo
1893 and this works for ENGINE based algorithms too.
1897 *) Update Gost ENGINE to support parameter files.
1898 [Victor B. Wagner <vitus@cryptocom.ru>]
1900 *) Support GeneralizedTime in ca utility.
1901 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
1903 *) Enhance the hash format used for certificate directory links. The new
1904 form uses the canonical encoding (meaning equivalent names will work
1905 even if they aren't identical) and uses SHA1 instead of MD5. This form
1906 is incompatible with the older format and as a result c_rehash should
1907 be used to rebuild symbolic links.
1910 *) Make PKCS#8 the default write format for private keys, replacing the
1911 traditional format. This form is standardised, more secure and doesn't
1912 include an implicit MD5 dependency.
1915 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
1916 committed to OpenSSL should pass this lot as a minimum.
1919 *) Add session ticket override functionality for use by EAP-FAST.
1920 [Jouni Malinen <j@w1.fi>]
1922 *) Modify HMAC functions to return a value. Since these can be implemented
1923 in an ENGINE errors can occur.
1926 *) Type-checked OBJ_bsearch_ex.
1929 *) Type-checked OBJ_bsearch. Also some constification necessitated
1930 by type-checking. Still to come: TXT_DB, bsearch(?),
1931 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
1935 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
1936 seconds to a tm structure directly, instead of going through OS
1937 specific date routines. This avoids any issues with OS routines such
1938 as the year 2038 bug. New *_adj() functions for ASN1 time structures
1939 and X509_time_adj_ex() to cover the extended range. The existing
1940 X509_time_adj() is still usable and will no longer have any date issues.
1943 *) Delta CRL support. New use deltas option which will attempt to locate
1944 and search any appropriate delta CRLs available.
1946 This work was sponsored by Google.
1949 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
1950 code and add additional score elements. Validate alternate CRL paths
1951 as part of the CRL checking and indicate a new error "CRL path validation
1952 error" in this case. Applications wanting additional details can use
1953 the verify callback and check the new "parent" field. If this is not
1954 NULL CRL path validation is taking place. Existing applications wont
1955 see this because it requires extended CRL support which is off by
1958 This work was sponsored by Google.
1961 *) Support for freshest CRL extension.
1963 This work was sponsored by Google.
1966 *) Initial indirect CRL support. Currently only supported in the CRLs
1967 passed directly and not via lookup. Process certificate issuer
1968 CRL entry extension and lookup CRL entries by bother issuer name
1969 and serial number. Check and process CRL issuer entry in IDP extension.
1971 This work was sponsored by Google.
1974 *) Add support for distinct certificate and CRL paths. The CRL issuer
1975 certificate is validated separately in this case. Only enabled if
1976 an extended CRL support flag is set: this flag will enable additional
1977 CRL functionality in future.
1979 This work was sponsored by Google.
1982 *) Add support for policy mappings extension.
1984 This work was sponsored by Google.
1987 *) Fixes to pathlength constraint, self issued certificate handling,
1988 policy processing to align with RFC3280 and PKITS tests.
1990 This work was sponsored by Google.
1993 *) Support for name constraints certificate extension. DN, email, DNS
1994 and URI types are currently supported.
1996 This work was sponsored by Google.
1999 *) To cater for systems that provide a pointer-based thread ID rather
2000 than numeric, deprecate the current numeric thread ID mechanism and
2001 replace it with a structure and associated callback type. This
2002 mechanism allows a numeric "hash" to be extracted from a thread ID in
2003 either case, and on platforms where pointers are larger than 'long',
2004 mixing is done to help ensure the numeric 'hash' is usable even if it
2005 can't be guaranteed unique. The default mechanism is to use "&errno"
2006 as a pointer-based thread ID to distinguish between threads.
2008 Applications that want to provide their own thread IDs should now use
2009 CRYPTO_THREADID_set_callback() to register a callback that will call
2010 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
2012 Note that ERR_remove_state() is now deprecated, because it is tied
2013 to the assumption that thread IDs are numeric. ERR_remove_state(0)
2014 to free the current thread's error state should be replaced by
2015 ERR_remove_thread_state(NULL).
2017 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
2018 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
2019 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
2020 application was previously providing a numeric thread callback that
2021 was inappropriate for distinguishing threads, then uniqueness might
2022 have been obtained with &errno that happened immediately in the
2023 intermediate development versions of OpenSSL; this is no longer the
2024 case, the numeric thread callback will now override the automatic use
2026 [Geoff Thorpe, with help from Bodo Moeller]
2028 *) Initial support for different CRL issuing certificates. This covers a
2029 simple case where the self issued certificates in the chain exist and
2030 the real CRL issuer is higher in the existing chain.
2032 This work was sponsored by Google.
2035 *) Removed effectively defunct crypto/store from the build.
2038 *) Revamp of STACK to provide stronger type-checking. Still to come:
2039 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
2040 ASN1_STRING, CONF_VALUE.
2043 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
2044 RAM on SSL connections. This option can save about 34k per idle SSL.
2047 *) Revamp of LHASH to provide stronger type-checking. Still to come:
2048 STACK, TXT_DB, bsearch, qsort.
2051 *) Initial support for Cryptographic Message Syntax (aka CMS) based
2052 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
2053 support for data, signedData, compressedData, digestedData and
2054 encryptedData, envelopedData types included. Scripts to check against
2055 RFC4134 examples draft and interop and consistency checks of many
2056 content types and variants.
2059 *) Add options to enc utility to support use of zlib compression BIO.
2062 *) Extend mk1mf to support importing of options and assembly language
2063 files from Configure script, currently only included in VC-WIN32.
2064 The assembly language rules can now optionally generate the source
2065 files from the associated perl scripts.
2068 *) Implement remaining functionality needed to support GOST ciphersuites.
2069 Interop testing has been performed using CryptoPro implementations.
2070 [Victor B. Wagner <vitus@cryptocom.ru>]
2072 *) s390x assembler pack.
2075 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
2079 *) Implement Opaque PRF Input TLS extension as specified in
2080 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
2081 official specification yet and no extension type assignment by
2082 IANA exists, this extension (for now) will have to be explicitly
2083 enabled when building OpenSSL by providing the extension number
2084 to use. For example, specify an option
2086 -DTLSEXT_TYPE_opaque_prf_input=0x9527
2088 to the "config" or "Configure" script to enable the extension,
2089 assuming extension number 0x9527 (which is a completely arbitrary
2090 and unofficial assignment based on the MD5 hash of the Internet
2091 Draft). Note that by doing so, you potentially lose
2092 interoperability with other TLS implementations since these might
2093 be using the same extension number for other purposes.
2095 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
2096 opaque PRF input value to use in the handshake. This will create
2097 an interal copy of the length-'len' string at 'src', and will
2098 return non-zero for success.
2100 To get more control and flexibility, provide a callback function
2103 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
2104 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
2108 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
2111 Callback function 'cb' will be called in handshakes, and is
2112 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
2113 Argument 'arg' is for application purposes (the value as given to
2114 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
2115 be provided to the callback function). The callback function
2116 has to return non-zero to report success: usually 1 to use opaque
2117 PRF input just if possible, or 2 to enforce use of the opaque PRF
2118 input. In the latter case, the library will abort the handshake
2119 if opaque PRF input is not successfully negotiated.
2121 Arguments 'peerinput' and 'len' given to the callback function
2122 will always be NULL and 0 in the case of a client. A server will
2123 see the client's opaque PRF input through these variables if
2124 available (NULL and 0 otherwise). Note that if the server
2125 provides an opaque PRF input, the length must be the same as the
2126 length of the client's opaque PRF input.
2128 Note that the callback function will only be called when creating
2129 a new session (session resumption can resume whatever was
2130 previously negotiated), and will not be called in SSL 2.0
2131 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
2132 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
2133 for applications that need to enforce opaque PRF input.
2137 *) Update ssl code to support digests other than SHA1+MD5 for handshake
2140 [Victor B. Wagner <vitus@cryptocom.ru>]
2142 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2143 RFC4507bis. The encrypted ticket format is an encrypted encoded
2144 SSL_SESSION structure, that way new session features are automatically
2147 If a client application caches session in an SSL_SESSION structure
2148 support is transparent because tickets are now stored in the encoded
2151 The SSL_CTX structure automatically generates keys for ticket
2152 protection in servers so again support should be possible
2153 with no application modification.
2155 If a client or server wishes to disable RFC4507 support then the option
2156 SSL_OP_NO_TICKET can be set.
2158 Add a TLS extension debugging callback to allow the contents of any client
2159 or server extensions to be examined.
2161 This work was sponsored by Google.
2164 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
2165 OpenSSL should now compile cleanly on gcc 4.2
2166 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
2168 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
2169 support including streaming MAC support: this is required for GOST
2170 ciphersuite support.
2171 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
2173 *) Add option -stream to use PKCS#7 streaming in smime utility. New
2174 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
2175 to output in BER and PEM format.
2178 *) Experimental support for use of HMAC via EVP_PKEY interface. This
2179 allows HMAC to be handled via the EVP_DigestSign*() interface. The
2180 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
2181 ENGINE support for HMAC keys which are unextractable. New -mac and
2182 -macopt options to dgst utility.
2185 *) New option -sigopt to dgst utility. Update dgst to use
2186 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
2187 alternative signing paramaters such as X9.31 or PSS in the dgst
2191 *) Change ssl_cipher_apply_rule(), the internal function that does
2192 the work each time a ciphersuite string requests enabling
2193 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
2194 removing ("!foo+bar") a class of ciphersuites: Now it maintains
2195 the order of disabled ciphersuites such that those ciphersuites
2196 that most recently went from enabled to disabled not only stay
2197 in order with respect to each other, but also have higher priority
2198 than other disabled ciphersuites the next time ciphersuites are
2201 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
2202 the same ciphersuites as with "HIGH" alone, but in a specific
2203 order where the PSK ciphersuites come first (since they are the
2204 most recently disabled ciphersuites when "HIGH" is parsed).
2206 Also, change ssl_create_cipher_list() (using this new
2207 funcionality) such that between otherwise identical
2208 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
2212 *) Change ssl_create_cipher_list() so that it automatically
2213 arranges the ciphersuites in reasonable order before starting
2214 to process the rule string. Thus, the definition for "DEFAULT"
2215 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
2216 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
2217 This makes it much easier to arrive at a reasonable default order
2218 in applications for which anonymous ciphers are OK (meaning
2219 that you can't actually use DEFAULT).
2220 [Bodo Moeller; suggested by Victor Duchovni]
2222 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
2223 processing) into multiple integers instead of setting
2224 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
2225 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
2226 (These masks as well as the individual bit definitions are hidden
2227 away into the non-exported interface ssl/ssl_locl.h, so this
2228 change to the definition of the SSL_CIPHER structure shouldn't
2229 affect applications.) This give us more bits for each of these
2230 categories, so there is no longer a need to coagulate AES128 and
2231 AES256 into a single algorithm bit, and to coagulate Camellia128
2232 and Camellia256 into a single algorithm bit, which has led to all
2235 Thus, among other things, the kludge introduced in 0.9.7m and
2236 0.9.8e for masking out AES256 independently of AES128 or masking
2237 out Camellia256 independently of AES256 is not needed here in 0.9.9.
2239 With the change, we also introduce new ciphersuite aliases that
2240 so far were missing: "AES128", "AES256", "CAMELLIA128", and
2244 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
2245 Use the leftmost N bytes of the signature input if the input is
2246 larger than the prime q (with N being the size in bytes of q).
2249 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
2250 it yet and it is largely untested.
2253 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
2256 *) Initial incomplete changes to avoid need for function casts in OpenSSL
2257 some compilers (gcc 4.2 and later) reject their use. Safestack is
2258 reimplemented. Update ASN1 to avoid use of legacy functions.
2261 *) Win32/64 targets are linked with Winsock2.
2264 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
2265 to external functions. This can be used to increase CRL handling
2266 efficiency especially when CRLs are very large by (for example) storing
2267 the CRL revoked certificates in a database.
2270 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
2271 new CRLs added to a directory can be used. New command line option
2272 -verify_return_error to s_client and s_server. This causes real errors
2273 to be returned by the verify callback instead of carrying on no matter
2274 what. This reflects the way a "real world" verify callback would behave.
2277 *) GOST engine, supporting several GOST algorithms and public key formats.
2278 Kindly donated by Cryptocom.
2281 *) Partial support for Issuing Distribution Point CRL extension. CRLs
2282 partitioned by DP are handled but no indirect CRL or reason partitioning
2283 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
2284 selected via a scoring technique which handles IDP and AKID in CRLs.
2287 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
2288 will ultimately be used for all verify operations: this will remove the
2289 X509_STORE dependency on certificate verification and allow alternative
2290 lookup methods. X509_STORE based implementations of these two callbacks.
2293 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
2294 Modify get_crl() to find a valid (unexpired) CRL if possible.
2297 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
2298 this would be called X509_CRL_cmp() but that name is already used by
2299 a function that just compares CRL issuer names. Cache several CRL
2300 extensions in X509_CRL structure and cache CRLDP in X509.
2303 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
2304 this maps equivalent X509_NAME structures into a consistent structure.
2305 Name comparison can then be performed rapidly using memcmp().
2308 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
2312 *) Allow digests to supply their own micalg string for S/MIME type using
2313 the ctrl EVP_MD_CTRL_MICALG.
2316 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
2317 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
2318 ctrl. It can then customise the structure before and/or after signing
2322 *) New function OBJ_add_sigid() to allow application defined signature OIDs
2323 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
2324 to free up any added signature OIDs.
2327 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
2328 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
2329 digest and cipher tables. New options added to openssl utility:
2330 list-message-digest-algorithms and list-cipher-algorithms.
2333 *) Change the array representation of binary polynomials: the list
2334 of degrees of non-zero coefficients is now terminated with -1.
2335 Previously it was terminated with 0, which was also part of the
2336 value; thus, the array representation was not applicable to
2337 polynomials where t^0 has coefficient zero. This change makes
2338 the array representation useful in a more general context.
2341 *) Various modifications and fixes to SSL/TLS cipher string
2342 handling. For ECC, the code now distinguishes between fixed ECDH
2343 with RSA certificates on the one hand and with ECDSA certificates
2344 on the other hand, since these are separate ciphersuites. The
2345 unused code for Fortezza ciphersuites has been removed.
2347 For consistency with EDH, ephemeral ECDH is now called "EECDH"
2348 (not "ECDHE"). For consistency with the code for DH
2349 certificates, use of ECDH certificates is now considered ECDH
2350 authentication, not RSA or ECDSA authentication (the latter is
2351 merely the CA's signing algorithm and not actively used in the
2354 The temporary ciphersuite alias "ECCdraft" is no longer
2355 available, and ECC ciphersuites are no longer excluded from "ALL"
2356 and "DEFAULT". The following aliases now exist for RFC 4492
2357 ciphersuites, most of these by analogy with the DH case:
2359 kECDHr - ECDH cert, signed with RSA
2360 kECDHe - ECDH cert, signed with ECDSA
2361 kECDH - ECDH cert (signed with either RSA or ECDSA)
2362 kEECDH - ephemeral ECDH
2363 ECDH - ECDH cert or ephemeral ECDH
2369 AECDH - anonymous ECDH
2370 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
2374 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
2375 Use correct micalg parameters depending on digest(s) in signed message.
2378 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
2379 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
2382 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
2383 an engine to register a method. Add ENGINE lookups for methods and
2384 functional reference processing.
2387 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
2388 EVP_{Sign,Verify}* which allow an application to customise the signature
2392 *) New -resign option to smime utility. This adds one or more signers
2393 to an existing PKCS#7 signedData structure. Also -md option to use an
2394 alternative message digest algorithm for signing.
2397 *) Tidy up PKCS#7 routines and add new functions to make it easier to
2398 create PKCS7 structures containing multiple signers. Update smime
2399 application to support multiple signers.
2402 *) New -macalg option to pkcs12 utility to allow setting of an alternative
2406 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
2407 Reorganize PBE internals to lookup from a static table using NIDs,
2408 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
2409 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
2410 PRF which will be automatically used with PBES2.
2413 *) Replace the algorithm specific calls to generate keys in "req" with the
2417 *) Update PKCS#7 enveloped data routines to use new API. This is now
2418 supported by any public key method supporting the encrypt operation. A
2419 ctrl is added to allow the public key algorithm to examine or modify
2420 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
2424 *) Add a ctrl to asn1 method to allow a public key algorithm to express
2425 a default digest type to use. In most cases this will be SHA1 but some
2426 algorithms (such as GOST) need to specify an alternative digest. The
2427 return value indicates how strong the preference is 1 means optional and
2428 2 is mandatory (that is it is the only supported type). Modify
2429 ASN1_item_sign() to accept a NULL digest argument to indicate it should
2430 use the default md. Update openssl utilities to use the default digest
2431 type for signing if it is not explicitly indicated.
2434 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
2435 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
2436 signing method from the key type. This effectively removes the link
2437 between digests and public key types.
2440 *) Add an OID cross reference table and utility functions. Its purpose is to
2441 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
2442 rsaEncryption. This will allow some of the algorithm specific hackery
2443 needed to use the correct OID to be removed.
2446 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
2447 structures for PKCS7_sign(). They are now set up by the relevant public
2451 *) Add provisional EC pkey method with support for ECDSA and ECDH.
2454 *) Add support for key derivation (agreement) in the API, DH method and
2458 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
2459 public and private key formats. As a side effect these add additional
2460 command line functionality not previously available: DSA signatures can be
2461 generated and verified using pkeyutl and DH key support and generation in
2466 [Oliver Tappe <zooey@hirschkaefer.de>]
2468 *) New make target "install_html_docs" installs HTML renditions of the
2470 [Oliver Tappe <zooey@hirschkaefer.de>]
2472 *) New utility "genpkey" this is analogous to "genrsa" etc except it can
2473 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
2474 support key and parameter generation and add initial key generation
2475 functionality for RSA.
2478 *) Add functions for main EVP_PKEY_method operations. The undocumented
2479 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
2480 EVP_PKEY_{encrypt,decrypt}_old.
2483 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
2484 key API, doesn't do much yet.
2487 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
2488 public key algorithms. New option to openssl utility:
2489 "list-public-key-algorithms" to print out info.
2492 *) Implement the Supported Elliptic Curves Extension for
2493 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2496 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
2497 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
2500 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
2501 utilities such as rsa, dsa, dsaparam etc except they process any key
2505 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
2506 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
2507 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
2511 *) Initial support for pluggable public key ASN1.
2512 De-spaghettify the public key ASN1 handling. Move public and private
2513 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
2514 algorithm specific handling to a single module within the relevant
2515 algorithm directory. Add functions to allow (near) opaque processing
2516 of public and private key structures.
2519 *) Implement the Supported Point Formats Extension for
2520 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2523 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
2524 for the psk identity [hint] and the psk callback functions to the
2525 SSL_SESSION, SSL and SSL_CTX structure.
2528 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
2532 SSL_CTX_use_psk_identity_hint
2533 SSL_get_psk_identity_hint
2534 SSL_get_psk_identity
2535 SSL_use_psk_identity_hint
2537 [Mika Kousa and Pasi Eronen of Nokia Corporation]
2539 *) Add RFC 3161 compliant time stamp request creation, response generation
2540 and response verification functionality.
2541 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
2543 *) Add initial support for TLS extensions, specifically for the server_name
2544 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2545 have new members for a host name. The SSL data structure has an
2546 additional member SSL_CTX *initial_ctx so that new sessions can be
2547 stored in that context to allow for session resumption, even after the
2548 SSL has been switched to a new SSL_CTX in reaction to a client's
2549 server_name extension.
2551 New functions (subject to change):
2553 SSL_get_servername()
2554 SSL_get_servername_type()
2557 New CTRL codes and macros (subject to change):
2559 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2560 - SSL_CTX_set_tlsext_servername_callback()
2561 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2562 - SSL_CTX_set_tlsext_servername_arg()
2563 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2565 openssl s_client has a new '-servername ...' option.
2567 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2568 '-key2 ...', '-servername_fatal' (subject to change). This allows
2569 testing the HostName extension for a specific single host name ('-cert'
2570 and '-key' remain fallbacks for handshakes without HostName
2571 negotiation). If the unrecognized_name alert has to be sent, this by
2572 default is a warning; it becomes fatal with the '-servername_fatal'
2575 [Peter Sylvester, Remy Allais, Christophe Renou]
2577 *) Whirlpool hash implementation is added.
2580 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
2581 bn(64,32). Because of instruction set limitations it doesn't have
2582 any negative impact on performance. This was done mostly in order
2583 to make it possible to share assembler modules, such as bn_mul_mont
2584 implementations, between 32- and 64-bit builds without hassle.
2587 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
2588 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
2592 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
2593 dedicated Montgomery multiplication procedure, is introduced.
2594 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
2595 "64-bit" performance on certain 32-bit targets.
2598 *) New option SSL_OP_NO_COMP to disable use of compression selectively
2599 in SSL structures. New SSL ctrl to set maximum send fragment size.
2600 Save memory by seeting the I/O buffer sizes dynamically instead of
2601 using the maximum available value.
2604 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
2605 in addition to the text details.
2608 *) Very, very preliminary EXPERIMENTAL support for printing of general
2609 ASN1 structures. This currently produces rather ugly output and doesn't
2610 handle several customised structures at all.
2613 *) Integrated support for PVK file format and some related formats such
2614 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
2615 these in the 'rsa' and 'dsa' utilities.
2618 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
2621 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
2622 place for the (very old) "NETSCAPE" format certificates which are now
2623 handled using new ASN1 code equivalents.
2626 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
2627 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
2628 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
2631 *) Modify CRL distribution points extension code to print out previously
2632 unsupported fields. Enhance extension setting code to allow setting of
2636 *) Add print and set support for Issuing Distribution Point CRL extension.
2639 *) Change 'Configure' script to enable Camellia by default.
2642 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
2644 *) When rejecting SSL/TLS records due to an incorrect version number, never
2645 update s->server with a new major version number. As of
2646 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
2647 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
2648 the previous behavior could result in a read attempt at NULL when
2649 receiving specific incorrect SSL/TLS records once record payload
2650 protection is active. (CVE-2010-0740)
2651 [Bodo Moeller, Adam Langley <agl@chromium.org>]
2653 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
2654 could be crashed if the relevant tables were not present (e.g. chrooted).
2655 [Tomas Hoger <thoger@redhat.com>]
2657 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
2659 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
2660 [Martin Olsson, Neel Mehta]
2662 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
2663 accommodate for stack sorting, always a write lock!).
2666 *) On some versions of WIN32 Heap32Next is very slow. This can cause
2667 excessive delays in the RAND_poll(): over a minute. As a workaround
2668 include a time check in the inner Heap32Next loop too.
2671 *) The code that handled flushing of data in SSL/TLS originally used the
2672 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
2673 the problem outlined in PR#1949. The fix suggested there however can
2674 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
2675 of Apache). So instead simplify the code to flush unconditionally.
2676 This should be fine since flushing with no data to flush is a no op.
2679 *) Handle TLS versions 2.0 and later properly and correctly use the
2680 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
2681 off ancient servers have a habit of sticking around for a while...
2684 *) Modify compression code so it frees up structures without using the
2685 ex_data callbacks. This works around a problem where some applications
2686 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
2687 restarting) then use compression (e.g. SSL with compression) later.
2688 This results in significant per-connection memory leaks and
2689 has caused some security issues including CVE-2008-1678 and
2693 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
2694 change when encrypting or decrypting.
2697 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
2698 connect and renegotiate with servers which do not support RI.
2699 Until RI is more widely deployed this option is enabled by default.
2702 *) Add "missing" ssl ctrls to clear options and mode.
2705 *) If client attempts to renegotiate and doesn't support RI respond with
2706 a no_renegotiation alert as required by RFC5746. Some renegotiating
2707 TLS clients will continue a connection gracefully when they receive
2708 the alert. Unfortunately OpenSSL mishandled this alert and would hang
2709 waiting for a server hello which it will never receive. Now we treat a
2710 received no_renegotiation alert as a fatal error. This is because
2711 applications requesting a renegotiation might well expect it to succeed
2712 and would have no code in place to handle the server denying it so the
2713 only safe thing to do is to terminate the connection.
2716 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
2717 peer supports secure renegotiation and 0 otherwise. Print out peer
2718 renegotiation support in s_client/s_server.
2721 *) Replace the highly broken and deprecated SPKAC certification method with
2722 the updated NID creation version. This should correctly handle UTF8.
2725 *) Implement RFC5746. Re-enable renegotiation but require the extension
2726 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
2727 turns out to be a bad idea. It has been replaced by
2728 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
2729 SSL_CTX_set_options(). This is really not recommended unless you
2730 know what you are doing.
2731 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
2733 *) Fixes to stateless session resumption handling. Use initial_ctx when
2734 issuing and attempting to decrypt tickets in case it has changed during
2735 servername handling. Use a non-zero length session ID when attempting
2736 stateless session resumption: this makes it possible to determine if
2737 a resumption has occurred immediately after receiving server hello
2738 (several places in OpenSSL subtly assume this) instead of later in
2742 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
2743 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
2744 fixes for a few places where the return code is not checked
2746 [Julia Lawall <julia@diku.dk>]
2748 *) Add --strict-warnings option to Configure script to include devteam
2749 warnings in other configurations.
2752 *) Add support for --libdir option and LIBDIR variable in makefiles. This
2753 makes it possible to install openssl libraries in locations which
2754 have names other than "lib", for example "/usr/lib64" which some
2756 [Steve Henson, based on patch from Jeremy Utley]
2758 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
2759 X690 8.9.12 and can produce some misleading textual output of OIDs.
2760 [Steve Henson, reported by Dan Kaminsky]
2762 *) Delete MD2 from algorithm tables. This follows the recommendation in
2763 several standards that it is not used in new applications due to
2764 several cryptographic weaknesses. For binary compatibility reasons
2765 the MD2 API is still compiled in by default.
2768 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
2772 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
2773 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
2775 [Guenter <lists@gknw.net>]
2777 *) Fix the server certificate chain building code to use X509_verify_cert(),
2778 it used to have an ad-hoc builder which was unable to cope with anything
2779 other than a simple chain.
2780 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
2782 *) Don't check self signed certificate signatures in X509_verify_cert()
2783 by default (a flag can override this): it just wastes time without
2784 adding any security. As a useful side effect self signed root CAs
2785 with non-FIPS digests are now usable in FIPS mode.
2788 *) In dtls1_process_out_of_seq_message() the check if the current message
2789 is already buffered was missing. For every new message was memory
2790 allocated, allowing an attacker to perform an denial of service attack
2791 with sending out of seq handshake messages until there is no memory
2792 left. Additionally every future messege was buffered, even if the
2793 sequence number made no sense and would be part of another handshake.
2794 So only messages with sequence numbers less than 10 in advance will be
2795 buffered. (CVE-2009-1378)
2796 [Robin Seggelmann, discovered by Daniel Mentz]
2798 *) Records are buffered if they arrive with a future epoch to be
2799 processed after finishing the corresponding handshake. There is
2800 currently no limitation to this buffer allowing an attacker to perform
2801 a DOS attack with sending records with future epochs until there is no
2802 memory left. This patch adds the pqueue_size() function to determine
2803 the size of a buffer and limits the record buffer to 100 entries.
2805 [Robin Seggelmann, discovered by Daniel Mentz]
2807 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
2808 parent structure is freed. (CVE-2009-1379)
2811 *) Handle non-blocking I/O properly in SSL_shutdown() call.
2812 [Darryl Miles <darryl-mailinglists@netbauds.net>]
2815 [Ilya O. <vrghost@gmail.com>]
2817 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
2819 *) Disable renegotiation completely - this fixes a severe security
2820 problem (CVE-2009-3555) at the cost of breaking all
2821 renegotiation. Renegotiation can be re-enabled by setting
2822 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
2823 run-time. This is really not recommended unless you know what
2827 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
2829 *) Don't set val to NULL when freeing up structures, it is freed up by
2830 underlying code. If sizeof(void *) > sizeof(long) this can result in
2831 zeroing past the valid field. (CVE-2009-0789)
2832 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
2834 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
2835 checked correctly. This would allow some invalid signed attributes to
2836 appear to verify correctly. (CVE-2009-0591)
2837 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2839 *) Reject UniversalString and BMPString types with invalid lengths. This
2840 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
2841 a legal length. (CVE-2009-0590)
2844 *) Set S/MIME signing as the default purpose rather than setting it
2845 unconditionally. This allows applications to override it at the store
2849 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2850 to handle some structures.
2853 *) Improve efficiency of mem_gets: don't search whole buffer each time
2855 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2857 *) New -hex option for openssl rand.
2860 *) Print out UTF8String and NumericString when parsing ASN1.
2863 *) Support NumericString type for name components.
2866 *) Allow CC in the environment to override the automatically chosen
2867 compiler. Note that nothing is done to ensure flags work with the
2871 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2873 *) Properly check EVP_VerifyFinal() and similar return values
2875 [Ben Laurie, Bodo Moeller, Google Security Team]
2877 *) Enable TLS extensions by default.
2880 *) Allow the CHIL engine to be loaded, whether the application is
2881 multithreaded or not. (This does not release the developer from the
2882 obligation to set up the dynamic locking callbacks.)
2883 [Sander Temme <sander@temme.net>]
2885 *) Use correct exit code if there is an error in dgst command.
2886 [Steve Henson; problem pointed out by Roland Dirlewanger]
2888 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2889 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2892 *) Add experimental JPAKE support, including demo authentication in
2893 s_client and s_server.
2896 *) Set the comparison function in v3_addr_canonize().
2897 [Rob Austein <sra@hactrn.net>]
2899 *) Add support for XMPP STARTTLS in s_client.
2900 [Philip Paeps <philip@freebsd.org>]
2902 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2903 to ensure that even with this option, only ciphersuites in the
2904 server's preference list will be accepted. (Note that the option
2905 applies only when resuming a session, so the earlier behavior was
2906 just about the algorithm choice for symmetric cryptography.)
2909 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2911 *) Fix NULL pointer dereference if a DTLS server received
2912 ChangeCipherSpec as first record (CVE-2009-1386).
2915 *) Fix a state transition in s3_srvr.c and d1_srvr.c
2916 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2919 *) The fix in 0.9.8c that supposedly got rid of unsafe
2920 double-checked locking was incomplete for RSA blinding,
2921 addressing just one layer of what turns out to have been
2922 doubly unsafe triple-checked locking.
2924 So now fix this for real by retiring the MONT_HELPER macro
2925 in crypto/rsa/rsa_eay.c.
2927 [Bodo Moeller; problem pointed out by Marius Schilder]
2929 *) Various precautionary measures:
2931 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2933 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2934 (NB: This would require knowledge of the secret session ticket key
2935 to exploit, in which case you'd be SOL either way.)
2937 - Change bn_nist.c so that it will properly handle input BIGNUMs
2938 outside the expected range.
2940 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2943 [Neel Mehta, Bodo Moeller]
2945 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2946 the load fails. Useful for distros.
2947 [Ben Laurie and the FreeBSD team]
2949 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2952 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2955 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2957 This work was sponsored by Logica.
2960 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2961 keystores. Support for SSL/TLS client authentication too.
2962 Not compiled unless enable-capieng specified to Configure.
2964 This work was sponsored by Logica.
2967 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2968 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2969 attribute creation routines such as certifcate requests and PKCS#12
2973 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2975 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2976 handshake which could lead to a cilent crash as found using the
2977 Codenomicon TLS test suite (CVE-2008-1672)
2978 [Steve Henson, Mark Cox]
2980 *) Fix double free in TLS server name extensions which could lead to
2981 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2984 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2986 Clear the error queue to ensure that error entries left from
2987 older function calls do not interfere with the correct operation.
2988 [Lutz Jaenicke, Erik de Castro Lopo]
2990 *) Remove root CA certificates of commercial CAs:
2992 The OpenSSL project does not recommend any specific CA and does not
2993 have any policy with respect to including or excluding any CA.
2994 Therefore it does not make any sense to ship an arbitrary selection
2995 of root CA certificates with the OpenSSL software.
2998 *) RSA OAEP patches to fix two separate invalid memory reads.
2999 The first one involves inputs when 'lzero' is greater than
3000 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
3001 before the beginning of from). The second one involves inputs where
3002 the 'db' section contains nothing but zeroes (there is a one-byte
3003 invalid read after the end of 'db').
3004 [Ivan Nestlerode <inestlerode@us.ibm.com>]
3006 *) Partial backport from 0.9.9-dev:
3008 Introduce bn_mul_mont (dedicated Montgomery multiplication
3009 procedure) as a candidate for BIGNUM assembler implementation.
3010 While 0.9.9-dev uses assembler for various architectures, only
3011 x86_64 is available by default here in the 0.9.8 branch, and
3012 32-bit x86 is available through a compile-time setting.
3014 To try the 32-bit x86 assembler implementation, use Configure
3015 option "enable-montasm" (which exists only for this backport).
3017 As "enable-montasm" for 32-bit x86 disclaims code stability
3018 anyway, in this constellation we activate additional code
3019 backported from 0.9.9-dev for further performance improvements,
3020 namely BN_from_montgomery_word. (To enable this otherwise,
3021 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
3023 [Andy Polyakov (backport partially by Bodo Moeller)]
3025 *) Add TLS session ticket callback. This allows an application to set
3026 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
3027 values. This is useful for key rollover for example where several key
3028 sets may exist with different names.
3031 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
3032 This was broken until now in 0.9.8 releases, such that the only way
3033 a registered ENGINE could be used (assuming it initialises
3034 successfully on the host) was to explicitly set it as the default
3035 for the relevant algorithms. This is in contradiction with 0.9.7
3036 behaviour and the documentation. With this fix, when an ENGINE is
3037 registered into a given algorithm's table of implementations, the
3038 'uptodate' flag is reset so that auto-discovery will be used next
3039 time a new context for that algorithm attempts to select an
3041 [Ian Lister (tweaked by Geoff Thorpe)]
3043 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
3044 implemention in the following ways:
3046 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
3049 Lack of BER streaming support means one pass streaming processing is
3050 only supported if data is detached: setting the streaming flag is
3051 ignored for embedded content.
3053 CMS support is disabled by default and must be explicitly enabled
3054 with the enable-cms configuration option.
3057 *) Update the GMP engine glue to do direct copies between BIGNUM and
3058 mpz_t when openssl and GMP use the same limb size. Otherwise the
3059 existing "conversion via a text string export" trick is still used.
3060 [Paul Sheer <paulsheer@gmail.com>]
3062 *) Zlib compression BIO. This is a filter BIO which compressed and
3063 uncompresses any data passed through it.
3066 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
3067 RFC3394 compatible AES key wrapping.
3070 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
3071 sets string data without copying. X509_ALGOR_set0() and
3072 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
3073 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
3074 from an X509_ATTRIBUTE structure optionally checking it occurs only
3075 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
3079 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
3080 to get the expected BN_FLG_CONSTTIME behavior.
3081 [Bodo Moeller (Google)]
3085 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
3086 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
3087 - added some more tests to do_tests.pl
3088 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
3089 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
3090 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
3091 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
3092 - various changes to netware.pl to enable gcc-cross builds on Win32
3094 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
3095 - various changes to fix missing prototype warnings
3096 - fixed x86nasm.pl to create correct asm files for NASM COFF output
3097 - added AES, WHIRLPOOL and CPUID assembler code to build files
3098 - added missing AES assembler make rules to mk1mf.pl
3099 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
3100 [Guenter Knauf <eflash@gmx.net>]
3102 *) Implement certificate status request TLS extension defined in RFC3546.
3103 A client can set the appropriate parameters and receive the encoded
3104 OCSP response via a callback. A server can query the supplied parameters
3105 and set the encoded OCSP response in the callback. Add simplified examples
3106 to s_client and s_server.
3109 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
3111 *) Fix various bugs:
3112 + Binary incompatibility of ssl_ctx_st structure
3113 + DTLS interoperation with non-compliant servers
3114 + Don't call get_session_cb() without proposed session
3115 + Fix ia64 assembler code
3116 [Andy Polyakov, Steve Henson]
3118 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
3120 *) DTLS Handshake overhaul. There were longstanding issues with
3121 OpenSSL DTLS implementation, which were making it impossible for
3122 RFC 4347 compliant client to communicate with OpenSSL server.
3123 Unfortunately just fixing these incompatibilities would "cut off"
3124 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
3125 server keeps tolerating non RFC compliant syntax. The opposite is
3126 not true, 0.9.8f client can not communicate with earlier server.
3127 This update even addresses CVE-2007-4995.
3130 *) Changes to avoid need for function casts in OpenSSL: some compilers
3131 (gcc 4.2 and later) reject their use.
3132 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
3135 *) Add RFC4507 support to OpenSSL. This includes the corrections in
3136 RFC4507bis. The encrypted ticket format is an encrypted encoded
3137 SSL_SESSION structure, that way new session features are automatically
3140 If a client application caches session in an SSL_SESSION structure
3141 support is transparent because tickets are now stored in the encoded
3144 The SSL_CTX structure automatically generates keys for ticket
3145 protection in servers so again support should be possible
3146 with no application modification.
3148 If a client or server wishes to disable RFC4507 support then the option
3149 SSL_OP_NO_TICKET can be set.
3151 Add a TLS extension debugging callback to allow the contents of any client
3152 or server extensions to be examined.
3154 This work was sponsored by Google.
3157 *) Add initial support for TLS extensions, specifically for the server_name
3158 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
3159 have new members for a host name. The SSL data structure has an
3160 additional member SSL_CTX *initial_ctx so that new sessions can be
3161 stored in that context to allow for session resumption, even after the
3162 SSL has been switched to a new SSL_CTX in reaction to a client's
3163 server_name extension.
3165 New functions (subject to change):
3167 SSL_get_servername()
3168 SSL_get_servername_type()
3171 New CTRL codes and macros (subject to change):
3173 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
3174 - SSL_CTX_set_tlsext_servername_callback()
3175 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
3176 - SSL_CTX_set_tlsext_servername_arg()
3177 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
3179 openssl s_client has a new '-servername ...' option.
3181 openssl s_server has new options '-servername_host ...', '-cert2 ...',
3182 '-key2 ...', '-servername_fatal' (subject to change). This allows
3183 testing the HostName extension for a specific single host name ('-cert'
3184 and '-key' remain fallbacks for handshakes without HostName
3185 negotiation). If the unrecognized_name alert has to be sent, this by
3186 default is a warning; it becomes fatal with the '-servername_fatal'
3189 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
3191 *) Add AES and SSE2 assembly language support to VC++ build.
3194 *) Mitigate attack on final subtraction in Montgomery reduction.
3197 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
3198 (which previously caused an internal error).
3201 *) Squeeze another 10% out of IGE mode when in != out.
3204 *) AES IGE mode speedup.
3205 [Dean Gaudet (Google)]
3207 *) Add the Korean symmetric 128-bit cipher SEED (see
3208 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
3209 add SEED ciphersuites from RFC 4162:
3211 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
3212 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
3213 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
3214 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
3216 To minimize changes between patchlevels in the OpenSSL 0.9.8
3217 series, SEED remains excluded from compilation unless OpenSSL
3218 is configured with 'enable-seed'.
3219 [KISA, Bodo Moeller]
3221 *) Mitigate branch prediction attacks, which can be practical if a
3222 single processor is shared, allowing a spy process to extract
3223 information. For detailed background information, see
3224 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
3225 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
3226 and Necessary Software Countermeasures"). The core of the change
3227 are new versions BN_div_no_branch() and
3228 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
3229 respectively, which are slower, but avoid the security-relevant
3230 conditional branches. These are automatically called by BN_div()
3231 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
3232 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
3233 remove a conditional branch.
3235 BN_FLG_CONSTTIME is the new name for the previous
3236 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
3237 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
3238 in the exponent causes BN_mod_exp_mont() to use the alternative
3239 implementation in BN_mod_exp_mont_consttime().) The old name
3240 remains as a deprecated alias.
3242 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
3243 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
3244 constant-time implementations for more than just exponentiation.
3245 Here too the old name is kept as a deprecated alias.
3247 BN_BLINDING_new() will now use BN_dup() for the modulus so that
3248 the BN_BLINDING structure gets an independent copy of the
3249 modulus. This means that the previous "BIGNUM *m" argument to
3250 BN_BLINDING_new() and to BN_BLINDING_create_param() now
3251 essentially becomes "const BIGNUM *m", although we can't actually
3252 change this in the header file before 0.9.9. It allows
3253 RSA_setup_blinding() to use BN_with_flags() on the modulus to
3254 enable BN_FLG_CONSTTIME.
3256 [Matthew D Wood (Intel Corp)]
3258 *) In the SSL/TLS server implementation, be strict about session ID
3259 context matching (which matters if an application uses a single
3260 external cache for different purposes). Previously,
3261 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
3262 set. This did ensure strict client verification, but meant that,
3263 with applications using a single external cache for quite
3264 different requirements, clients could circumvent ciphersuite
3265 restrictions for a given session ID context by starting a session
3266 in a different context.
3269 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3270 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3271 authentication-only ciphersuites.
3274 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
3275 not complete and could lead to a possible single byte overflow
3276 (CVE-2007-5135) [Ben Laurie]
3278 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
3280 *) Since AES128 and AES256 (and similarly Camellia128 and
3281 Camellia256) share a single mask bit in the logic of
3282 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3283 kludge to work properly if AES128 is available and AES256 isn't
3284 (or if Camellia128 is available and Camellia256 isn't).
3287 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
3288 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
3289 When a point or a seed is encoded in a BIT STRING, we need to
3290 prevent the removal of trailing zero bits to get the proper DER
3291 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
3292 of a NamedBitList, for which trailing 0 bits need to be removed.)
3295 *) Have SSL/TLS server implementation tolerate "mismatched" record
3296 protocol version while receiving ClientHello even if the
3297 ClientHello is fragmented. (The server can't insist on the
3298 particular protocol version it has chosen before the ServerHello
3299 message has informed the client about his choice.)
3302 *) Add RFC 3779 support.
3303 [Rob Austein for ARIN, Ben Laurie]
3305 *) Load error codes if they are not already present instead of using a
3306 static variable. This allows them to be cleanly unloaded and reloaded.
3307 Improve header file function name parsing.
3310 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
3311 or CAPABILITY handshake as required by RFCs.
3314 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
3316 *) Introduce limits to prevent malicious keys being able to
3317 cause a denial of service. (CVE-2006-2940)
3318 [Steve Henson, Bodo Moeller]
3320 *) Fix ASN.1 parsing of certain invalid structures that can result
3321 in a denial of service. (CVE-2006-2937) [Steve Henson]
3323 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3324 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3326 *) Fix SSL client code which could crash if connecting to a
3327 malicious SSLv2 server. (CVE-2006-4343)
3328 [Tavis Ormandy and Will Drewry, Google Security Team]
3330 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
3331 match only those. Before that, "AES256-SHA" would be interpreted
3332 as a pattern and match "AES128-SHA" too (since AES128-SHA got
3333 the same strength classification in 0.9.7h) as we currently only
3334 have a single AES bit in the ciphersuite description bitmap.
3335 That change, however, also applied to ciphersuite strings such as
3336 "RC4-MD5" that intentionally matched multiple ciphersuites --
3337 namely, SSL 2.0 ciphersuites in addition to the more common ones
3338 from SSL 3.0/TLS 1.0.
3340 So we change the selection algorithm again: Naming an explicit
3341 ciphersuite selects this one ciphersuite, and any other similar
3342 ciphersuite (same bitmap) from *other* protocol versions.
3343 Thus, "RC4-MD5" again will properly select both the SSL 2.0
3344 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
3346 Since SSL 2.0 does not have any ciphersuites for which the
3347 128/256 bit distinction would be relevant, this works for now.
3348 The proper fix will be to use different bits for AES128 and
3349 AES256, which would have avoided the problems from the beginning;
3350 however, bits are scarce, so we can only do this in a new release
3351 (not just a patchlevel) when we can change the SSL_CIPHER
3352 definition to split the single 'unsigned long mask' bitmap into
3353 multiple values to extend the available space.
3357 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
3359 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3360 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3362 *) Add AES IGE and biIGE modes.
3365 *) Change the Unix randomness entropy gathering to use poll() when
3366 possible instead of select(), since the latter has some
3367 undesirable limitations.
3368 [Darryl Miles via Richard Levitte and Bodo Moeller]
3370 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
3371 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
3372 cannot be implicitly activated as part of, e.g., the "AES" alias.
3373 However, please upgrade to OpenSSL 0.9.9[-dev] for
3374 non-experimental use of the ECC ciphersuites to get TLS extension
3375 support, which is required for curve and point format negotiation
3376 to avoid potential handshake problems.
3379 *) Disable rogue ciphersuites:
3381 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3382 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3383 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3385 The latter two were purportedly from
3386 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3389 Also deactivate the remaining ciphersuites from
3390 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3391 unofficial, and the ID has long expired.
3394 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3395 dual-core machines) and other potential thread-safety issues.
3398 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
3399 versions), which is now available for royalty-free use
3400 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
3401 Also, add Camellia TLS ciphersuites from RFC 4132.
3403 To minimize changes between patchlevels in the OpenSSL 0.9.8
3404 series, Camellia remains excluded from compilation unless OpenSSL
3405 is configured with 'enable-camellia'.
3408 *) Disable the padding bug check when compression is in use. The padding
3409 bug check assumes the first packet is of even length, this is not
3410 necessarily true if compresssion is enabled and can result in false
3411 positives causing handshake failure. The actual bug test is ancient
3412 code so it is hoped that implementations will either have fixed it by
3413 now or any which still have the bug do not support compression.
3416 Changes between 0.9.8a and 0.9.8b [04 May 2006]
3418 *) When applying a cipher rule check to see if string match is an explicit
3419 cipher suite and only match that one cipher suite if it is.
3422 *) Link in manifests for VC++ if needed.
3423 [Austin Ziegler <halostatue@gmail.com>]
3425 *) Update support for ECC-based TLS ciphersuites according to
3426 draft-ietf-tls-ecc-12.txt with proposed changes (but without
3427 TLS extensions, which are supported starting with the 0.9.9
3428 branch, not in the OpenSSL 0.9.8 branch).
3431 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
3432 opaque EVP_CIPHER_CTX handling.
3435 *) Fixes and enhancements to zlib compression code. We now only use
3436 "zlib1.dll" and use the default __cdecl calling convention on Win32
3437 to conform with the standards mentioned here:
3438 http://www.zlib.net/DLL_FAQ.txt
3439 Static zlib linking now works on Windows and the new --with-zlib-include
3440 --with-zlib-lib options to Configure can be used to supply the location
3441 of the headers and library. Gracefully handle case where zlib library
3445 *) Several fixes and enhancements to the OID generation code. The old code
3446 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
3447 handle numbers larger than ULONG_MAX, truncated printing and had a
3448 non standard OBJ_obj2txt() behaviour.
3451 *) Add support for building of engines under engine/ as shared libraries
3452 under VC++ build system.
3455 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
3456 Hopefully, we will not see any false combination of paths any more.
3459 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
3461 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3462 (part of SSL_OP_ALL). This option used to disable the
3463 countermeasure against man-in-the-middle protocol-version
3464 rollback in the SSL 2.0 server implementation, which is a bad
3465 idea. (CVE-2005-2969)
3467 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3468 for Information Security, National Institute of Advanced Industrial
3469 Science and Technology [AIST], Japan)]
3471 *) Add two function to clear and return the verify parameter flags.
3474 *) Keep cipherlists sorted in the source instead of sorting them at
3475 runtime, thus removing the need for a lock.
3478 *) Avoid some small subgroup attacks in Diffie-Hellman.
3479 [Nick Mathewson and Ben Laurie]
3481 *) Add functions for well-known primes.
3484 *) Extended Windows CE support.
3485 [Satoshi Nakamura and Andy Polyakov]
3487 *) Initialize SSL_METHOD structures at compile time instead of during
3488 runtime, thus removing the need for a lock.
3491 *) Make PKCS7_decrypt() work even if no certificate is supplied by
3492 attempting to decrypt each encrypted key in turn. Add support to
3496 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
3498 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
3501 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
3504 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
3505 key into the same file any more.
3508 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
3511 *) Add -utf8 command line and config file option to 'ca'.
3512 [Stefan <stf@udoma.org]
3514 *) Removed the macro des_crypt(), as it seems to conflict with some
3515 libraries. Use DES_crypt().
3518 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
3519 involves renaming the source and generated shared-libs for
3520 both. The engines will accept the corrected or legacy ids
3521 ('ncipher' and '4758_cca' respectively) when binding. NB,
3522 this only applies when building 'shared'.
3523 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
3525 *) Add attribute functions to EVP_PKEY structure. Modify
3526 PKCS12_create() to recognize a CSP name attribute and
3527 use it. Make -CSP option work again in pkcs12 utility.
3530 *) Add new functionality to the bn blinding code:
3531 - automatic re-creation of the BN_BLINDING parameters after
3532 a fixed number of uses (currently 32)
3533 - add new function for parameter creation
3534 - introduce flags to control the update behaviour of the
3535 BN_BLINDING parameters
3536 - hide BN_BLINDING structure
3537 Add a second BN_BLINDING slot to the RSA structure to improve
3538 performance when a single RSA object is shared among several
3542 *) Add support for DTLS.
3543 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
3545 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
3546 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
3549 *) Remove buggy and incomplete DH cert support from
3550 ssl/ssl_rsa.c and ssl/s3_both.c
3553 *) Use SHA-1 instead of MD5 as the default digest algorithm for
3554 the apps/openssl applications.
3557 *) Compile clean with "-Wall -Wmissing-prototypes
3558 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
3559 DEBUG_SAFESTACK must also be set.
3562 *) Change ./Configure so that certain algorithms can be disabled by default.
3563 The new counterpiece to "no-xxx" is "enable-xxx".
3565 The patented RC5 and MDC2 algorithms will now be disabled unless
3566 "enable-rc5" and "enable-mdc2", respectively, are specified.
3568 (IDEA remains enabled despite being patented. This is because IDEA
3569 is frequently required for interoperability, and there is no license
3570 fee for non-commercial use. As before, "no-idea" can be used to
3571 avoid this algorithm.)
3575 *) Add processing of proxy certificates (see RFC 3820). This work was
3576 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
3577 EGEE (Enabling Grids for E-science in Europe).
3580 *) RC4 performance overhaul on modern architectures/implementations, such
3581 as Intel P4, IA-64 and AMD64.
3584 *) New utility extract-section.pl. This can be used specify an alternative
3585 section number in a pod file instead of having to treat each file as
3586 a separate case in Makefile. This can be done by adding two lines to the
3589 =for comment openssl_section:XXX
3591 The blank line is mandatory.
3595 *) New arguments -certform, -keyform and -pass for s_client and s_server
3596 to allow alternative format key and certificate files and passphrase
3600 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
3601 update associated structures and add various utility functions.
3603 Add new policy related verify parameters, include policy checking in
3604 standard verify code. Enhance 'smime' application with extra parameters
3605 to support policy checking and print out.
3608 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
3609 Nehemiah processors. These extensions support AES encryption in hardware
3610 as well as RNG (though RNG support is currently disabled).
3611 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
3613 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
3616 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
3617 [Andy Polyakov and a number of other people]
3619 *) Improved PowerPC platform support. Most notably BIGNUM assembler
3620 implementation contributed by IBM.
3621 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
3623 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
3624 exponent rather than 'unsigned long'. There is a corresponding change to
3625 the new 'rsa_keygen' element of the RSA_METHOD structure.
3626 [Jelte Jansen, Geoff Thorpe]
3628 *) Functionality for creating the initial serial number file is now
3629 moved from CA.pl to the 'ca' utility with a new option -create_serial.
3631 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
3632 number file to 1, which is bound to cause problems. To avoid
3633 the problems while respecting compatibility between different 0.9.7
3634 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
3635 CA.pl for serial number initialization. With the new release 0.9.8,
3636 we can fix the problem directly in the 'ca' utility.)
3639 *) Reduced header interdepencies by declaring more opaque objects in
3640 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
3641 give fewer recursive includes, which could break lazy source code - so
3642 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
3643 developers should define this symbol when building and using openssl to
3644 ensure they track the recommended behaviour, interfaces, [etc], but
3645 backwards-compatible behaviour prevails when this isn't defined.
3648 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
3651 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
3652 This will generate a random key of the appropriate length based on the
3653 cipher context. The EVP_CIPHER can provide its own random key generation
3654 routine to support keys of a specific form. This is used in the des and
3655 3des routines to generate a key of the correct parity. Update S/MIME
3656 code to use new functions and hence generate correct parity DES keys.
3657 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
3658 valid (weak or incorrect parity).
3661 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
3662 as looking them up. This is useful when the verified structure may contain
3663 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
3664 present unless the new PKCS7_NO_CRL flag is asserted.
3667 *) Extend ASN1 oid configuration module. It now additionally accepts the
3670 shortName = some long name, 1.2.3.4
3673 *) Reimplemented the BN_CTX implementation. There is now no more static
3674 limitation on the number of variables it can handle nor the depth of the
3675 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
3676 information can now expand as required, and rather than having a single
3677 static array of bignums, BN_CTX now uses a linked-list of such arrays
3678 allowing it to expand on demand whilst maintaining the usefulness of
3679 BN_CTX's "bundling".
3682 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
3683 to allow all RSA operations to function using a single BN_CTX.
3686 *) Preliminary support for certificate policy evaluation and checking. This
3687 is initially intended to pass the tests outlined in "Conformance Testing
3688 of Relying Party Client Certificate Path Processing Logic" v1.07.
3691 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
3692 remained unused and not that useful. A variety of other little bignum
3693 tweaks and fixes have also been made continuing on from the audit (see
3697 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
3698 associated ASN1, EVP and SSL functions and old ASN1 macros.
3701 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
3702 and this should never fail. So the return value from the use of
3703 BN_set_word() (which can fail due to needless expansion) is now deprecated;
3704 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
3707 *) BN_CTX_get() should return zero-valued bignums, providing the same
3708 initialised value as BN_new().
3709 [Geoff Thorpe, suggested by Ulf Möller]
3711 *) Support for inhibitAnyPolicy certificate extension.
3714 *) An audit of the BIGNUM code is underway, for which debugging code is
3715 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
3716 is considered valid when processing BIGNUMs, and causes execution to
3717 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
3718 further steps are taken to deliberately pollute unused data in BIGNUM
3719 structures to try and expose faulty code further on. For now, openssl will
3720 (in its default mode of operation) continue to tolerate the inconsistent
3721 forms that it has tolerated in the past, but authors and packagers should
3722 consider trying openssl and their own applications when compiled with
3723 these debugging symbols defined. It will help highlight potential bugs in
3724 their own code, and will improve the test coverage for OpenSSL itself. At
3725 some point, these tighter rules will become openssl's default to improve
3726 maintainability, though the assert()s and other overheads will remain only
3727 in debugging configurations. See bn.h for more details.
3728 [Geoff Thorpe, Nils Larsch, Ulf Möller]
3730 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
3731 that can only be obtained through BN_CTX_new() (which implicitly
3732 initialises it). The presence of this function only made it possible
3733 to overwrite an existing structure (and cause memory leaks).
3736 *) Because of the callback-based approach for implementing LHASH as a
3737 template type, lh_insert() adds opaque objects to hash-tables and
3738 lh_doall() or lh_doall_arg() are typically used with a destructor callback
3739 to clean up those corresponding objects before destroying the hash table
3740 (and losing the object pointers). So some over-zealous constifications in
3741 LHASH have been relaxed so that lh_insert() does not take (nor store) the
3742 objects as "const" and the lh_doall[_arg] callback wrappers are not
3743 prototyped to have "const" restrictions on the object pointers they are
3744 given (and so aren't required to cast them away any more).
3747 *) The tmdiff.h API was so ugly and minimal that our own timing utility
3748 (speed) prefers to use its own implementation. The two implementations
3749 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
3750 its object type properly exposed (MS_TM) instead of casting to/from "char
3751 *". This may still change yet if someone realises MS_TM and "ms_time_***"
3752 aren't necessarily the greatest nomenclatures - but this is what was used
3753 internally to the implementation so I've used that for now.
3756 *) Ensure that deprecated functions do not get compiled when
3757 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
3758 the self-tests were still using deprecated key-generation functions so
3759 these have been updated also.
3762 *) Reorganise PKCS#7 code to separate the digest location functionality
3763 into PKCS7_find_digest(), digest addition into PKCS7_bio_add_digest().
3764 New function PKCS7_set_digest() to set the digest type for PKCS#7
3765 digestedData type. Add additional code to correctly generate the
3766 digestedData type and add support for this type in PKCS7 initialization
3770 *) New function PKCS7_set0_type_other() this initializes a PKCS7
3771 structure of type "other".
3774 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
3775 sure the loop does correctly stop and breaking ("division by zero")
3776 modulus operations are not performed. The (pre-generated) prime
3777 table crypto/bn/bn_prime.h was already correct, but it could not be
3778 re-generated on some platforms because of the "division by zero"
3779 situation in the script.
3780 [Ralf S. Engelschall]
3782 *) Update support for ECC-based TLS ciphersuites according to
3783 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
3784 SHA-1 now is only used for "small" curves (where the
3785 representation of a field element takes up to 24 bytes); for
3786 larger curves, the field element resulting from ECDH is directly
3787 used as premaster secret.
3788 [Douglas Stebila (Sun Microsystems Laboratories)]
3790 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
3791 curve secp160r1 to the tests.
3792 [Douglas Stebila (Sun Microsystems Laboratories)]
3794 *) Add the possibility to load symbols globally with DSO.
3795 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
3797 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
3798 control of the error stack.
3801 *) Add support for STORE in ENGINE.
3804 *) Add the STORE type. The intention is to provide a common interface
3805 to certificate and key stores, be they simple file-based stores, or
3806 HSM-type store, or LDAP stores, or...
3807 NOTE: The code is currently UNTESTED and isn't really used anywhere.
3810 *) Add a generic structure called OPENSSL_ITEM. This can be used to
3811 pass a list of arguments to any function as well as provide a way
3812 for a function to pass data back to the caller.
3815 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
3816 works like BUF_strdup() but can be used to duplicate a portion of
3817 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
3821 *) Add the function sk_find_ex() which works like sk_find(), but will
3822 return an index to an element even if an exact match couldn't be
3823 found. The index is guaranteed to point at the element where the
3824 searched-for key would be inserted to preserve sorting order.
3827 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
3828 takes an extra flags argument for optional functionality. Currently,
3829 the following flags are defined:
3831 OBJ_BSEARCH_VALUE_ON_NOMATCH
3832 This one gets OBJ_bsearch_ex() to return a pointer to the first
3833 element where the comparing function returns a negative or zero
3836 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
3837 This one gets OBJ_bsearch_ex() to return a pointer to the first
3838 element where the comparing function returns zero. This is useful
3839 if there are more than one element where the comparing function
3843 *) Make it possible to create self-signed certificates with 'openssl ca'
3844 in such a way that the self-signed certificate becomes part of the
3845 CA database and uses the same mechanisms for serial number generation
3846 as all other certificate signing. The new flag '-selfsign' enables
3847 this functionality. Adapt CA.sh and CA.pl.in.
3850 *) Add functionality to check the public key of a certificate request
3851 against a given private. This is useful to check that a certificate
3852 request can be signed by that key (self-signing).
3855 *) Make it possible to have multiple active certificates with the same
3856 subject in the CA index file. This is done only if the keyword
3857 'unique_subject' is set to 'no' in the main CA section (default
3858 if 'CA_default') of the configuration file. The value is saved
3859 with the database itself in a separate index attribute file,
3860 named like the index file with '.attr' appended to the name.
3863 *) Generate muti valued AVAs using '+' notation in config files for
3867 *) Support for nameConstraints certificate extension.
3870 *) Support for policyConstraints certificate extension.
3873 *) Support for policyMappings certificate extension.
3876 *) Make sure the default DSA_METHOD implementation only uses its
3877 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
3878 and change its own handlers to be NULL so as to remove unnecessary
3879 indirection. This lets alternative implementations fallback to the
3880 default implementation more easily.
3883 *) Support for directoryName in GeneralName related extensions
3887 *) Make it possible to link applications using Makefile.shared.
3888 Make that possible even when linking against static libraries!
3891 *) Support for single pass processing for S/MIME signing. This now
3892 means that S/MIME signing can be done from a pipe, in addition
3893 cleartext signing (multipart/signed type) is effectively streaming
3894 and the signed data does not need to be all held in memory.
3896 This is done with a new flag PKCS7_STREAM. When this flag is set
3897 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
3898 is done after the data is output (and digests calculated) in
3899 SMIME_write_PKCS7().
3902 *) Add full support for -rpath/-R, both in shared libraries and
3903 applications, at least on the platforms where it's known how
3907 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
3908 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
3909 will now compute a table of multiples of the generator that
3910 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
3911 faster (notably in the case of a single point multiplication,
3912 scalar * generator).
3913 [Nils Larsch, Bodo Moeller]
3915 *) IPv6 support for certificate extensions. The various extensions
3916 which use the IP:a.b.c.d can now take IPv6 addresses using the
3917 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
3921 *) Added an ENGINE that implements RSA by performing private key
3922 exponentiations with the GMP library. The conversions to and from
3923 GMP's mpz_t format aren't optimised nor are any montgomery forms
3924 cached, and on x86 it appears OpenSSL's own performance has caught up.
3925 However there are likely to be other architectures where GMP could
3926 provide a boost. This ENGINE is not built in by default, but it can be
3927 specified at Configure time and should be accompanied by the necessary
3928 linker additions, eg;
3929 ./config -DOPENSSL_USE_GMP -lgmp
3932 *) "openssl engine" will not display ENGINE/DSO load failure errors when
3933 testing availability of engines with "-t" - the old behaviour is
3934 produced by increasing the feature's verbosity with "-tt".
3937 *) ECDSA routines: under certain error conditions uninitialized BN objects
3938 could be freed. Solution: make sure initialization is performed early
3939 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
3943 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
3944 and DH_METHOD (eg. by ENGINE implementations) to override the normal
3945 software implementations. For DSA and DH, parameter generation can
3946 also be overriden by providing the appropriate method callbacks.
3949 *) Change the "progress" mechanism used in key-generation and
3950 primality testing to functions that take a new BN_GENCB pointer in
3951 place of callback/argument pairs. The new API functions have "_ex"
3952 postfixes and the older functions are reimplemented as wrappers for
3953 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
3954 declarations of the old functions to help (graceful) attempts to
3955 migrate to the new functions. Also, the new key-generation API
3956 functions operate on a caller-supplied key-structure and return
3957 success/failure rather than returning a key or NULL - this is to
3958 help make "keygen" another member function of RSA_METHOD etc.
3960 Example for using the new callback interface:
3962 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
3966 BN_GENCB_set(&my_cb, my_callback, my_arg);
3968 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
3969 /* For the meaning of a, b in calls to my_callback(), see the
3970 * documentation of the function that calls the callback.
3971 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
3972 * my_callback should return 1 if it wants BN_is_prime_ex()
3973 * to continue, or 0 to stop.
3978 *) Change the ZLIB compression method to be stateful, and make it
3979 available to TLS with the number defined in
3980 draft-ietf-tls-compression-04.txt.
3983 *) Add the ASN.1 structures and functions for CertificatePair, which
3984 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
3986 CertificatePair ::= SEQUENCE {
3987 forward [0] Certificate OPTIONAL,
3988 reverse [1] Certificate OPTIONAL,
3989 -- at least one of the pair shall be present -- }
3991 Also implement the PEM functions to read and write certificate
3992 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
3994 This needed to be defined, mostly for the sake of the LDAP
3995 attribute crossCertificatePair, but may prove useful elsewhere as
3999 *) Make it possible to inhibit symlinking of shared libraries in
4000 Makefile.shared, for Cygwin's sake.
4003 *) Extend the BIGNUM API by creating a function
4004 void BN_set_negative(BIGNUM *a, int neg);
4005 and a macro that behave like
4006 int BN_is_negative(const BIGNUM *a);
4008 to avoid the need to access 'a->neg' directly in applications.
4011 *) Implement fast modular reduction for pseudo-Mersenne primes
4012 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
4013 EC_GROUP_new_curve_GFp() will now automatically use this
4015 [Nils Larsch <nla@trustcenter.de>]
4017 *) Add new lock type (CRYPTO_LOCK_BN).
4020 *) Change the ENGINE framework to automatically load engines
4021 dynamically from specific directories unless they could be
4022 found to already be built in or loaded. Move all the
4023 current engines except for the cryptodev one to a new
4025 The engines in engines/ are built as shared libraries if
4026 the "shared" options was given to ./Configure or ./config.
4027 Otherwise, they are inserted in libcrypto.a.
4028 /usr/local/ssl/engines is the default directory for dynamic
4029 engines, but that can be overriden at configure time through
4030 the usual use of --prefix and/or --openssldir, and at run
4031 time with the environment variable OPENSSL_ENGINES.
4032 [Geoff Thorpe and Richard Levitte]
4034 *) Add Makefile.shared, a helper makefile to build shared
4035 libraries. Adapt Makefile.org.
4038 *) Add version info to Win32 DLLs.
4039 [Peter 'Luna' Runestig" <peter@runestig.com>]
4041 *) Add new 'medium level' PKCS#12 API. Certificates and keys
4042 can be added using this API to created arbitrary PKCS#12
4043 files while avoiding the low level API.
4045 New options to PKCS12_create(), key or cert can be NULL and
4046 will then be omitted from the output file. The encryption
4047 algorithm NIDs can be set to -1 for no encryption, the mac
4048 iteration count can be set to 0 to omit the mac.
4050 Enhance pkcs12 utility by making the -nokeys and -nocerts
4051 options work when creating a PKCS#12 file. New option -nomac
4052 to omit the mac, NONE can be set for an encryption algorithm.
4053 New code is modified to use the enhanced PKCS12_create()
4054 instead of the low level API.
4057 *) Extend ASN1 encoder to support indefinite length constructed
4058 encoding. This can output sequences tags and octet strings in
4059 this form. Modify pk7_asn1.c to support indefinite length
4060 encoding. This is experimental and needs additional code to
4061 be useful, such as an ASN1 bio and some enhanced streaming
4064 Extend template encode functionality so that tagging is passed
4065 down to the template encoder.
4068 *) Let 'openssl req' fail if an argument to '-newkey' is not
4069 recognized instead of using RSA as a default.
4072 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
4073 As these are not official, they are not included in "ALL";
4074 the "ECCdraft" ciphersuite group alias can be used to select them.
4075 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
4077 *) Add ECDH engine support.
4078 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
4080 *) Add ECDH in new directory crypto/ecdh/.
4081 [Douglas Stebila (Sun Microsystems Laboratories)]
4083 *) Let BN_rand_range() abort with an error after 100 iterations
4084 without success (which indicates a broken PRNG).
4087 *) Change BN_mod_sqrt() so that it verifies that the input value
4088 is really the square of the return value. (Previously,
4089 BN_mod_sqrt would show GIGO behaviour.)
4092 *) Add named elliptic curves over binary fields from X9.62, SECG,
4093 and WAP/WTLS; add OIDs that were still missing.
4095 [Sheueling Chang Shantz and Douglas Stebila
4096 (Sun Microsystems Laboratories)]
4098 *) Extend the EC library for elliptic curves over binary fields
4099 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
4102 EC_GF2m_simple_method
4106 EC_GROUP_new_curve_GF2m
4107 EC_GROUP_set_curve_GF2m
4108 EC_GROUP_get_curve_GF2m
4109 EC_POINT_set_affine_coordinates_GF2m
4110 EC_POINT_get_affine_coordinates_GF2m
4111 EC_POINT_set_compressed_coordinates_GF2m
4113 Point compression for binary fields is disabled by default for
4114 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
4117 As binary polynomials are represented as BIGNUMs, various members
4118 of the EC_GROUP and EC_POINT data structures can be shared
4119 between the implementations for prime fields and binary fields;
4120 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
4121 are essentially identical to their ..._GFp counterparts.
4122 (For simplicity, the '..._GFp' prefix has been dropped from
4123 various internal method names.)
4125 An internal 'field_div' method (similar to 'field_mul' and
4126 'field_sqr') has been added; this is used only for binary fields.
4128 [Sheueling Chang Shantz and Douglas Stebila
4129 (Sun Microsystems Laboratories)]
4131 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
4132 through methods ('mul', 'precompute_mult').
4134 The generic implementations (now internally called 'ec_wNAF_mul'
4135 and 'ec_wNAF_precomputed_mult') remain the default if these
4136 methods are undefined.
4138 [Sheueling Chang Shantz and Douglas Stebila
4139 (Sun Microsystems Laboratories)]
4141 *) New function EC_GROUP_get_degree, which is defined through
4142 EC_METHOD. For curves over prime fields, this returns the bit
4143 length of the modulus.
4145 [Sheueling Chang Shantz and Douglas Stebila
4146 (Sun Microsystems Laboratories)]
4148 *) New functions EC_GROUP_dup, EC_POINT_dup.
4149 (These simply call ..._new and ..._copy).
4151 [Sheueling Chang Shantz and Douglas Stebila
4152 (Sun Microsystems Laboratories)]
4154 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
4155 Polynomials are represented as BIGNUMs (where the sign bit is not
4156 used) in the following functions [macros]:
4159 BN_GF2m_sub [= BN_GF2m_add]
4160 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
4161 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
4162 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
4164 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
4165 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
4166 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
4167 BN_GF2m_cmp [= BN_ucmp]
4169 (Note that only the 'mod' functions are actually for fields GF(2^m).
4170 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
4172 For some functions, an the irreducible polynomial defining a
4173 field can be given as an 'unsigned int[]' with strictly
4174 decreasing elements giving the indices of those bits that are set;
4175 i.e., p[] represents the polynomial
4176 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
4178 p[0] > p[1] > ... > p[k] = 0.
4179 This applies to the following functions:
4184 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
4185 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
4187 BN_GF2m_mod_sqrt_arr
4188 BN_GF2m_mod_solve_quad_arr
4192 Conversion can be performed by the following functions:
4197 bntest.c has additional tests for binary polynomial arithmetic.
4199 Two implementations for BN_GF2m_mod_div() are available.
4200 The default algorithm simply uses BN_GF2m_mod_inv() and
4201 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
4202 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
4203 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
4205 [Sheueling Chang Shantz and Douglas Stebila
4206 (Sun Microsystems Laboratories)]
4208 *) Add new error code 'ERR_R_DISABLED' that can be used when some
4209 functionality is disabled at compile-time.
4210 [Douglas Stebila <douglas.stebila@sun.com>]
4212 *) Change default behaviour of 'openssl asn1parse' so that more
4213 information is visible when viewing, e.g., a certificate:
4215 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
4216 mode the content of non-printable OCTET STRINGs is output in a
4217 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
4218 avoid the appearance of a printable string.
4219 [Nils Larsch <nla@trustcenter.de>]
4221 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
4223 EC_GROUP_set_asn1_flag()
4224 EC_GROUP_get_asn1_flag()
4225 EC_GROUP_set_point_conversion_form()
4226 EC_GROUP_get_point_conversion_form()
4227 These control ASN1 encoding details:
4228 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
4229 has been set to OPENSSL_EC_NAMED_CURVE.
4230 - Points are encoded in uncompressed form by default; options for
4231 asn1_for are as for point2oct, namely
4232 POINT_CONVERSION_COMPRESSED
4233 POINT_CONVERSION_UNCOMPRESSED
4234 POINT_CONVERSION_HYBRID
4236 Also add 'seed' and 'seed_len' members to EC_GROUP with access
4239 EC_GROUP_get0_seed()
4240 EC_GROUP_get_seed_len()
4241 This is used only for ASN1 purposes (so far).
4242 [Nils Larsch <nla@trustcenter.de>]
4244 *) Add 'field_type' member to EC_METHOD, which holds the NID
4245 of the appropriate field type OID. The new function
4246 EC_METHOD_get_field_type() returns this value.
4247 [Nils Larsch <nla@trustcenter.de>]
4252 EC_POINT_point2hex()
4253 EC_POINT_hex2point()
4254 providing useful interfaces to EC_POINT_point2oct() and
4255 EC_POINT_oct2point().
4256 [Nils Larsch <nla@trustcenter.de>]
4258 *) Change internals of the EC library so that the functions
4259 EC_GROUP_set_generator()
4260 EC_GROUP_get_generator()
4261 EC_GROUP_get_order()
4262 EC_GROUP_get_cofactor()
4263 are implemented directly in crypto/ec/ec_lib.c and not dispatched
4264 to methods, which would lead to unnecessary code duplication when
4265 adding different types of curves.
4266 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
4268 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
4269 arithmetic, and such that modified wNAFs are generated
4270 (which avoid length expansion in many cases).
4273 *) Add a function EC_GROUP_check_discriminant() (defined via
4274 EC_METHOD) that verifies that the curve discriminant is non-zero.
4276 Add a function EC_GROUP_check() that makes some sanity tests
4277 on a EC_GROUP, its generator and order. This includes
4278 EC_GROUP_check_discriminant().
4279 [Nils Larsch <nla@trustcenter.de>]
4281 *) Add ECDSA in new directory crypto/ecdsa/.
4283 Add applications 'openssl ecparam' and 'openssl ecdsa'
4284 (these are based on 'openssl dsaparam' and 'openssl dsa').
4286 ECDSA support is also included in various other files across the
4287 library. Most notably,
4288 - 'openssl req' now has a '-newkey ecdsa:file' option;
4289 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
4290 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
4291 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
4292 them suitable for ECDSA where domain parameters must be
4293 extracted before the specific public key;
4294 - ECDSA engine support has been added.
4295 [Nils Larsch <nla@trustcenter.de>]
projects / openssl.git / blob