5 Changes between 1.0.2 and 1.1.0 [xx XXX xxxx]
7 *) Rewrite PSK to support ECDHE_PSK, DHE_PSK and RSA_PSK. Add ciphersuites
8 from RFC4279, RFC4785, RFC5487, RFC5489.
10 Thanks to Christian J. Dietrich and Giuseppe D'Angelo for the
11 original RSA_PSK patch.
14 *) Dropped support for the SSL3_FLAGS_DELAY_CLIENT_FINISHED flag. This SSLeay
15 era flag was never set throughout the codebase (only read). Also removed
16 SSL3_FLAGS_POP_BUFFER which was only used if
17 SSL3_FLAGS_DELAY_CLIENT_FINISHED was also set.
20 *) Changed the default name options in the "ca", "crl", "req" and "x509"
21 to be "oneline" instead of "compat".
24 *) Remove SSL_OP_TLS_BLOCK_PADDING_BUG. This is SSLeay legacy, we're
25 not aware of clients that still exhibit this bug, and the workaround
26 hasn't been working properly for a while.
29 *) The return type of BIO_number_read() and BIO_number_written() as well as
30 the corresponding num_read and num_write members in the BIO structure has
31 changed from unsigned long to uint64_t. On platforms where an unsigned
32 long is 32 bits (e.g. Windows) these counters could overflow if >4Gb is
36 *) Given the pervasive nature of TLS extensions it is inadvisable to run
37 OpenSSL without support for them. It also means that maintaining
38 the OPENSSL_NO_TLSEXT option within the code is very invasive (and probably
39 not well tested). Therefore the OPENSSL_NO_TLSEXT option has been removed.
42 *) Removed support for the two export grade static DH ciphersuites
43 EXP-DH-RSA-DES-CBC-SHA and EXP-DH-DSS-DES-CBC-SHA. These two ciphersuites
44 were newly added (along with a number of other static DH ciphersuites) to
45 1.0.2. However the two export ones have *never* worked since they were
46 introduced. It seems strange in any case to be adding new export
47 ciphersuites, and given "logjam" it also does not seem correct to fix them.
50 *) Version negotiation has been rewritten. In particular SSLv23_method(),
51 SSLv23_client_method() and SSLv23_server_method() have been deprecated,
52 and turned into macros which simply call the new preferred function names
53 TLS_method(), TLS_client_method() and TLS_server_method(). All new code
54 should use the new names instead. Also as part of this change the ssl23.h
55 header file has been removed.
58 *) Support for Kerberos ciphersuites in TLS (RFC2712) has been removed. This
59 code and the associated standard is no longer considered fit-for-purpose.
62 *) RT2547 was closed. When generating a private key, try to make the
63 output file readable only by the owner. This behavior change might
64 be noticeable when interacting with other software.
66 *) Added HTTP GET support to the ocsp command.
69 *) RAND_pseudo_bytes has been deprecated. Users should use RAND_bytes instead.
72 *) Added support for TLS extended master secret from
73 draft-ietf-tls-session-hash-03.txt. Thanks for Alfredo Pironti for an
74 initial patch which was a great help during development.
77 *) All libssl internal structures have been removed from the public header
78 files, and the OPENSSL_NO_SSL_INTERN option has been removed (since it is
79 now redundant). Users should not attempt to access internal structures
80 directly. Instead they should use the provided API functions.
83 *) config has been changed so that by default OPENSSL_NO_DEPRECATED is used.
84 Access to deprecated functions can be re-enabled by running config with
85 "enable-deprecated". In addition applications wishing to use deprecated
86 functions must define OPENSSL_USE_DEPRECATED. Note that this new behaviour
87 will, by default, disable some transitive includes that previously existed
88 in the header files (e.g. ec.h will no longer, by default, include bn.h)
91 *) Added support for OCB mode. OpenSSL has been granted a patent license
92 compatible with the OpenSSL license for use of OCB. Details are available
93 at https://www.openssl.org/docs/misc/OCB-patent-grant-OpenSSL.pdf. Support
94 for OCB can be removed by calling config with no-ocb.
97 *) SSLv2 support has been removed. It still supports receiving a SSLv2
98 compatible client hello.
101 *) Increased the minimal RSA keysize from 256 to 512 bits [Rich Salz],
102 done while fixing the error code for the key-too-small case.
103 [Annie Yousar <a.yousar@informatik.hu-berlin.de>]
105 *) CA.sh has been removmed; use CA.pl instead.
108 *) Removed old DES API.
111 *) Remove various unsupported platforms:
117 Sinix/ReliantUNIX RM400
122 16-bit platforms such as WIN16
125 *) Clean up OPENSSL_NO_xxx #define's
126 Use setbuf() and remove OPENSSL_NO_SETVBUF_IONBF
127 Rename OPENSSL_SYSNAME_xxx to OPENSSL_SYS_xxx
128 OPENSSL_NO_EC{DH,DSA} merged into OPENSSL_NO_EC
129 OPENSSL_NO_RIPEMD160, OPENSSL_NO_RIPEMD merged into OPENSSL_NO_RMD160
130 OPENSSL_NO_FP_API merged into OPENSSL_NO_STDIO
131 Remove OPENSSL_NO_BIO OPENSSL_NO_BUFFER OPENSSL_NO_CHAIN_VERIFY
132 OPENSSL_NO_EVP OPENSSL_NO_FIPS_ERR OPENSSL_NO_HASH_COMP
133 OPENSSL_NO_LHASH OPENSSL_NO_OBJECT OPENSSL_NO_SPEED OPENSSL_NO_STACK
134 OPENSSL_NO_X509 OPENSSL_NO_X509_VERIFY
135 Remove MS_STATIC; it's a relic from platforms <32 bits.
138 *) Cleaned up dead code
139 Remove all but one '#ifdef undef' which is to be looked at.
142 *) Clean up calling of xxx_free routines.
143 Just like free(), fix most of the xxx_free routines to accept
144 NULL. Remove the non-null checks from callers. Save much code.
147 *) Add secure heap for storage of private keys (when possible).
148 Add BIO_s_secmem(), CBIGNUM, etc.
149 Contributed by Akamai Technologies under our Corporate CLA.
152 *) Experimental support for a new, fast, unbiased prime candidate generator,
153 bn_probable_prime_dh_coprime(). Not currently used by any prime generator.
154 [Felix Laurie von Massenbach <felix@erbridge.co.uk>]
156 *) New output format NSS in the sess_id command line tool. This allows
157 exporting the session id and the master key in NSS keylog format.
158 [Martin Kaiser <martin@kaiser.cx>]
160 *) Harmonize version and its documentation. -f flag is used to display
162 [mancha <mancha1@zoho.com>]
164 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
165 in i2d_ECPrivateKey. Thanks to Ted Unangst for feedback on this issue.
166 [mancha <mancha1@zoho.com>]
168 *) Fix some double frees. These are not thought to be exploitable.
169 [mancha <mancha1@zoho.com>]
171 *) A missing bounds check in the handling of the TLS heartbeat extension
172 can be used to reveal up to 64k of memory to a connected client or
175 Thanks for Neel Mehta of Google Security for discovering this bug and to
176 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
177 preparing the fix (CVE-2014-0160)
178 [Adam Langley, Bodo Moeller]
180 *) Fix for the attack described in the paper "Recovering OpenSSL
181 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
182 by Yuval Yarom and Naomi Benger. Details can be obtained from:
183 http://eprint.iacr.org/2014/140
185 Thanks to Yuval Yarom and Naomi Benger for discovering this
186 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
187 [Yuval Yarom and Naomi Benger]
189 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
190 this fixes a limitation in previous versions of OpenSSL.
193 *) Experimental encrypt-then-mac support.
195 Experimental support for encrypt then mac from
196 draft-gutmann-tls-encrypt-then-mac-02.txt
198 To enable it set the appropriate extension number (0x42 for the test
199 server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42
201 For non-compliant peers (i.e. just about everything) this should have no
204 WARNING: EXPERIMENTAL, SUBJECT TO CHANGE.
208 *) Add EVP support for key wrapping algorithms, to avoid problems with
209 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
210 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
211 algorithms and include tests cases.
214 *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for
218 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
219 MGF1 digest and OAEP label.
222 *) Make openssl verify return errors.
223 [Chris Palmer <palmer@google.com> and Ben Laurie]
225 *) New function ASN1_TIME_diff to calculate the difference between two
226 ASN1_TIME structures or one structure and the current time.
229 *) Update fips_test_suite to support multiple command line options. New
230 test to induce all self test errors in sequence and check expected
234 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
235 sign or verify all in one operation.
238 *) Add fips_algvs: a multicall fips utility incorporating all the algorithm
239 test programs and fips_test_suite. Includes functionality to parse
240 the minimal script output of fipsalgest.pl directly.
243 *) Add authorisation parameter to FIPS_module_mode_set().
246 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
249 *) Use separate DRBG fields for internal and external flags. New function
250 FIPS_drbg_health_check() to perform on demand health checking. Add
251 generation tests to fips_test_suite with reduced health check interval to
252 demonstrate periodic health checking. Add "nodh" option to
253 fips_test_suite to skip very slow DH test.
256 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
260 *) More extensive health check for DRBG checking many more failure modes.
261 New function FIPS_selftest_drbg_all() to handle every possible DRBG
262 combination: call this in fips_test_suite.
265 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
266 and POST to handle Dual EC cases.
269 *) Add support for canonical generation of DSA parameter 'g'. See
272 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
273 POST to handle HMAC cases.
276 *) Add functions FIPS_module_version() and FIPS_module_version_text()
277 to return numerical and string versions of the FIPS module number.
280 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
281 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented
282 outside the validated module in the FIPS capable OpenSSL.
285 *) Minor change to DRBG entropy callback semantics. In some cases
286 there is no multiple of the block length between min_len and
287 max_len. Allow the callback to return more than max_len bytes
288 of entropy but discard any extra: it is the callback's responsibility
289 to ensure that the extra data discarded does not impact the
290 requested amount of entropy.
293 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
294 information in FIPS186-3, SP800-57 and SP800-131A.
297 *) CCM support via EVP. Interface is very similar to GCM case except we
298 must supply all data in one chunk (i.e. no update, final) and the
299 message length must be supplied if AAD is used. Add algorithm test
303 *) Initial version of POST overhaul. Add POST callback to allow the status
304 of POST to be monitored and/or failures induced. Modify fips_test_suite
305 to use callback. Always run all selftests even if one fails.
308 *) XTS support including algorithm test driver in the fips_gcmtest program.
309 Note: this does increase the maximum key length from 32 to 64 bytes but
310 there should be no binary compatibility issues as existing applications
311 will never use XTS mode.
314 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
315 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
316 performs algorithm blocking for unapproved PRNG types. Also do not
317 set PRNG type in FIPS_mode_set(): leave this to the application.
318 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
319 the standard OpenSSL PRNG: set additional data to a date time vector.
322 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
323 This shouldn't present any incompatibility problems because applications
324 shouldn't be using these directly and any that are will need to rethink
325 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
328 *) Extensive self tests and health checking required by SP800-90 DRBG.
329 Remove strength parameter from FIPS_drbg_instantiate and always
330 instantiate at maximum supported strength.
333 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
336 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
339 *) New function DH_compute_key_padded() to compute a DH key and pad with
340 leading zeroes if needed: this complies with SP800-56A et al.
343 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
344 anything, incomplete, subject to change and largely untested at present.
347 *) Modify fipscanisteronly build option to only build the necessary object
348 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
351 *) Add experimental option FIPSSYMS to give all symbols in
352 fipscanister.o and FIPS or fips prefix. This will avoid
353 conflicts with future versions of OpenSSL. Add perl script
354 util/fipsas.pl to preprocess assembly language source files
355 and rename any affected symbols.
358 *) Add selftest checks and algorithm block of non-fips algorithms in
359 FIPS mode. Remove DES2 from selftests.
362 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
363 return internal method without any ENGINE dependencies. Add new
364 tiny fips sign and verify functions.
367 *) New build option no-ec2m to disable characteristic 2 code.
370 *) New build option "fipscanisteronly". This only builds fipscanister.o
371 and (currently) associated fips utilities. Uses the file Makefile.fips
372 instead of Makefile.org as the prototype.
375 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
376 Update fips_gcmtest to use IV generator.
379 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
380 setting output buffer to NULL. The *Final function must be
381 called although it will not retrieve any additional data. The tag
382 can be set or retrieved with a ctrl. The IV length is by default 12
383 bytes (96 bits) but can be set to an alternative value. If the IV
384 length exceeds the maximum IV length (currently 16 bytes) it cannot be
388 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
389 underlying do_cipher function handles all cipher semantics itself
390 including padding and finalisation. This is useful if (for example)
391 an ENGINE cipher handles block padding itself. The behaviour of
392 do_cipher is subtly changed if this flag is set: the return value
393 is the number of characters written to the output buffer (zero is
394 no longer an error code) or a negative error code. Also if the
395 input buffer is NULL and length 0 finalisation should be performed.
398 *) If a candidate issuer certificate is already part of the constructed
399 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
402 *) Improve forward-security support: add functions
404 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
405 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
407 for use by SSL/TLS servers; the callback function will be called whenever a
408 new session is created, and gets to decide whether the session may be
409 cached to make it resumable (return 0) or not (return 1). (As by the
410 SSL/TLS protocol specifications, the session_id sent by the server will be
411 empty to indicate that the session is not resumable; also, the server will
412 not generate RFC 4507 (RFC 5077) session tickets.)
414 A simple reasonable callback implementation is to return is_forward_secure.
415 This parameter will be set to 1 or 0 depending on the ciphersuite selected
416 by the SSL/TLS server library, indicating whether it can provide forward
418 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
420 *) New -verify_name option in command line utilities to set verification
424 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
425 Add CMAC pkey methods.
428 *) Experimental renegotiation in s_server -www mode. If the client
429 browses /reneg connection is renegotiated. If /renegcert it is
430 renegotiated requesting a certificate.
433 *) Add an "external" session cache for debugging purposes to s_server. This
434 should help trace issues which normally are only apparent in deployed
435 multi-process servers.
438 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
439 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
440 BIO_set_cipher() and some obscure PEM functions were changed so they
441 can now return an error. The RAND changes required a change to the
442 RAND_METHOD structure.
445 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
446 a gcc attribute to warn if the result of a function is ignored. This
447 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
448 whose return value is often ignored.
451 Changes between 1.0.2c and 1.0.2d [xx XXX xxxx]
453 *) Alternate chains certificate forgery
455 During certificate verfification, OpenSSL will attempt to find an
456 alternative certificate chain if the first attempt to build such a chain
457 fails. An error in the implementation of this logic can mean that an
458 attacker could cause certain checks on untrusted certificates to be
459 bypassed, such as the CA flag, enabling them to use a valid leaf
460 certificate to act as a CA and "issue" an invalid certificate.
462 This issue was reported to OpenSSL by Adam Langley/David Benjamin
466 Changes between 1.0.2b and 1.0.2c [12 Jun 2015]
468 *) Fix HMAC ABI incompatibility. The previous version introduced an ABI
469 incompatibility in the handling of HMAC. The previous ABI has now been
473 Changes between 1.0.2a and 1.0.2b [11 Jun 2015]
475 *) Malformed ECParameters causes infinite loop
477 When processing an ECParameters structure OpenSSL enters an infinite loop
478 if the curve specified is over a specially malformed binary polynomial
481 This can be used to perform denial of service against any
482 system which processes public keys, certificate requests or
483 certificates. This includes TLS clients and TLS servers with
484 client authentication enabled.
486 This issue was reported to OpenSSL by Joseph Barr-Pixton.
490 *) Exploitable out-of-bounds read in X509_cmp_time
492 X509_cmp_time does not properly check the length of the ASN1_TIME
493 string and can read a few bytes out of bounds. In addition,
494 X509_cmp_time accepts an arbitrary number of fractional seconds in the
497 An attacker can use this to craft malformed certificates and CRLs of
498 various sizes and potentially cause a segmentation fault, resulting in
499 a DoS on applications that verify certificates or CRLs. TLS clients
500 that verify CRLs are affected. TLS clients and servers with client
501 authentication enabled may be affected if they use custom verification
504 This issue was reported to OpenSSL by Robert Swiecki (Google), and
505 independently by Hanno Böck.
509 *) PKCS7 crash with missing EnvelopedContent
511 The PKCS#7 parsing code does not handle missing inner EncryptedContent
512 correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs
513 with missing content and trigger a NULL pointer dereference on parsing.
515 Applications that decrypt PKCS#7 data or otherwise parse PKCS#7
516 structures from untrusted sources are affected. OpenSSL clients and
517 servers are not affected.
519 This issue was reported to OpenSSL by Michal Zalewski (Google).
523 *) CMS verify infinite loop with unknown hash function
525 When verifying a signedData message the CMS code can enter an infinite loop
526 if presented with an unknown hash function OID. This can be used to perform
527 denial of service against any system which verifies signedData messages using
529 This issue was reported to OpenSSL by Johannes Bauer.
533 *) Race condition handling NewSessionTicket
535 If a NewSessionTicket is received by a multi-threaded client when attempting to
536 reuse a previous ticket then a race condition can occur potentially leading to
537 a double free of the ticket data.
541 *) Only support 256-bit or stronger elliptic curves with the
542 'ecdh_auto' setting (server) or by default (client). Of supported
543 curves, prefer P-256 (both).
546 Changes between 1.0.2 and 1.0.2a [19 Mar 2015]
548 *) ClientHello sigalgs DoS fix
550 If a client connects to an OpenSSL 1.0.2 server and renegotiates with an
551 invalid signature algorithms extension a NULL pointer dereference will
552 occur. This can be exploited in a DoS attack against the server.
554 This issue was was reported to OpenSSL by David Ramos of Stanford
557 [Stephen Henson and Matt Caswell]
559 *) Multiblock corrupted pointer fix
561 OpenSSL 1.0.2 introduced the "multiblock" performance improvement. This
562 feature only applies on 64 bit x86 architecture platforms that support AES
563 NI instructions. A defect in the implementation of "multiblock" can cause
564 OpenSSL's internal write buffer to become incorrectly set to NULL when
565 using non-blocking IO. Typically, when the user application is using a
566 socket BIO for writing, this will only result in a failed connection.
567 However if some other BIO is used then it is likely that a segmentation
568 fault will be triggered, thus enabling a potential DoS attack.
570 This issue was reported to OpenSSL by Daniel Danner and Rainer Mueller.
574 *) Segmentation fault in DTLSv1_listen fix
576 The DTLSv1_listen function is intended to be stateless and processes the
577 initial ClientHello from many peers. It is common for user code to loop
578 over the call to DTLSv1_listen until a valid ClientHello is received with
579 an associated cookie. A defect in the implementation of DTLSv1_listen means
580 that state is preserved in the SSL object from one invocation to the next
581 that can lead to a segmentation fault. Errors processing the initial
582 ClientHello can trigger this scenario. An example of such an error could be
583 that a DTLS1.0 only client is attempting to connect to a DTLS1.2 only
586 This issue was reported to OpenSSL by Per Allansson.
590 *) Segmentation fault in ASN1_TYPE_cmp fix
592 The function ASN1_TYPE_cmp will crash with an invalid read if an attempt is
593 made to compare ASN.1 boolean types. Since ASN1_TYPE_cmp is used to check
594 certificate signature algorithm consistency this can be used to crash any
595 certificate verification operation and exploited in a DoS attack. Any
596 application which performs certificate verification is vulnerable including
597 OpenSSL clients and servers which enable client authentication.
601 *) Segmentation fault for invalid PSS parameters fix
603 The signature verification routines will crash with a NULL pointer
604 dereference if presented with an ASN.1 signature using the RSA PSS
605 algorithm and invalid parameters. Since these routines are used to verify
606 certificate signature algorithms this can be used to crash any
607 certificate verification operation and exploited in a DoS attack. Any
608 application which performs certificate verification is vulnerable including
609 OpenSSL clients and servers which enable client authentication.
611 This issue was was reported to OpenSSL by Brian Carpenter.
615 *) ASN.1 structure reuse memory corruption fix
617 Reusing a structure in ASN.1 parsing may allow an attacker to cause
618 memory corruption via an invalid write. Such reuse is and has been
619 strongly discouraged and is believed to be rare.
621 Applications that parse structures containing CHOICE or ANY DEFINED BY
622 components may be affected. Certificate parsing (d2i_X509 and related
623 functions) are however not affected. OpenSSL clients and servers are
628 *) PKCS7 NULL pointer dereferences fix
630 The PKCS#7 parsing code does not handle missing outer ContentInfo
631 correctly. An attacker can craft malformed ASN.1-encoded PKCS#7 blobs with
632 missing content and trigger a NULL pointer dereference on parsing.
634 Applications that verify PKCS#7 signatures, decrypt PKCS#7 data or
635 otherwise parse PKCS#7 structures from untrusted sources are
636 affected. OpenSSL clients and servers are not affected.
638 This issue was reported to OpenSSL by Michal Zalewski (Google).
642 *) DoS via reachable assert in SSLv2 servers fix
644 A malicious client can trigger an OPENSSL_assert (i.e., an abort) in
645 servers that both support SSLv2 and enable export cipher suites by sending
646 a specially crafted SSLv2 CLIENT-MASTER-KEY message.
648 This issue was discovered by Sean Burford (Google) and Emilia Käsper
649 (OpenSSL development team).
653 *) Empty CKE with client auth and DHE fix
655 If client auth is used then a server can seg fault in the event of a DHE
656 ciphersuite being selected and a zero length ClientKeyExchange message
657 being sent by the client. This could be exploited in a DoS attack.
661 *) Handshake with unseeded PRNG fix
663 Under certain conditions an OpenSSL 1.0.2 client can complete a handshake
664 with an unseeded PRNG. The conditions are:
665 - The client is on a platform where the PRNG has not been seeded
666 automatically, and the user has not seeded manually
667 - A protocol specific client method version has been used (i.e. not
668 SSL_client_methodv23)
669 - A ciphersuite is used that does not require additional random data from
670 the PRNG beyond the initial ClientHello client random (e.g. PSK-RC4-SHA).
672 If the handshake succeeds then the client random that has been used will
673 have been generated from a PRNG with insufficient entropy and therefore the
674 output may be predictable.
676 For example using the following command with an unseeded openssl will
677 succeed on an unpatched platform:
679 openssl s_client -psk 1a2b3c4d -tls1_2 -cipher PSK-RC4-SHA
683 *) Use After Free following d2i_ECPrivatekey error fix
685 A malformed EC private key file consumed via the d2i_ECPrivateKey function
686 could cause a use after free condition. This, in turn, could cause a double
687 free in several private key parsing functions (such as d2i_PrivateKey
688 or EVP_PKCS82PKEY) and could lead to a DoS attack or memory corruption
689 for applications that receive EC private keys from untrusted
690 sources. This scenario is considered rare.
692 This issue was discovered by the BoringSSL project and fixed in their
697 *) X509_to_X509_REQ NULL pointer deref fix
699 The function X509_to_X509_REQ will crash with a NULL pointer dereference if
700 the certificate key is invalid. This function is rarely used in practice.
702 This issue was discovered by Brian Carpenter.
706 *) Removed the export ciphers from the DEFAULT ciphers
709 Changes between 1.0.1l and 1.0.2 [22 Jan 2015]
711 *) Facilitate "universal" ARM builds targeting range of ARM ISAs, e.g.
712 ARMv5 through ARMv8, as opposite to "locking" it to single one.
713 So far those who have to target multiple plaforms would compromise
714 and argue that binary targeting say ARMv5 would still execute on
715 ARMv8. "Universal" build resolves this compromise by providing
716 near-optimal performance even on newer platforms.
719 *) Accelerated NIST P-256 elliptic curve implementation for x86_64
720 (other platforms pending).
721 [Shay Gueron & Vlad Krasnov (Intel Corp), Andy Polyakov]
723 *) Add support for the SignedCertificateTimestampList certificate and
724 OCSP response extensions from RFC6962.
727 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
728 for corner cases. (Certain input points at infinity could lead to
729 bogus results, with non-infinity inputs mapped to infinity too.)
732 *) Initial support for PowerISA 2.0.7, first implemented in POWER8.
733 This covers AES, SHA256/512 and GHASH. "Initial" means that most
734 common cases are optimized and there still is room for further
735 improvements. Vector Permutation AES for Altivec is also added.
738 *) Add support for little-endian ppc64 Linux target.
739 [Marcelo Cerri (IBM)]
741 *) Initial support for AMRv8 ISA crypto extensions. This covers AES,
742 SHA1, SHA256 and GHASH. "Initial" means that most common cases
743 are optimized and there still is room for further improvements.
744 Both 32- and 64-bit modes are supported.
745 [Andy Polyakov, Ard Biesheuvel (Linaro)]
747 *) Improved ARMv7 NEON support.
750 *) Support for SPARC Architecture 2011 crypto extensions, first
751 implemented in SPARC T4. This covers AES, DES, Camellia, SHA1,
752 SHA256/512, MD5, GHASH and modular exponentiation.
753 [Andy Polyakov, David Miller]
755 *) Accelerated modular exponentiation for Intel processors, a.k.a.
757 [Shay Gueron & Vlad Krasnov (Intel Corp)]
759 *) Support for new and upcoming Intel processors, including AVX2,
760 BMI and SHA ISA extensions. This includes additional "stitched"
761 implementations, AESNI-SHA256 and GCM, and multi-buffer support
764 This work was sponsored by Intel Corp.
767 *) Support for DTLS 1.2. This adds two sets of DTLS methods: DTLS_*_method()
768 supports both DTLS 1.2 and 1.0 and should use whatever version the peer
769 supports and DTLSv1_2_*_method() which supports DTLS 1.2 only.
772 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
773 this fixes a limiation in previous versions of OpenSSL.
776 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
777 MGF1 digest and OAEP label.
780 *) Add EVP support for key wrapping algorithms, to avoid problems with
781 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
782 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
783 algorithms and include tests cases.
786 *) Add functions to allocate and set the fields of an ECDSA_METHOD
788 [Douglas E. Engert, Steve Henson]
790 *) New functions OPENSSL_gmtime_diff and ASN1_TIME_diff to find the
791 difference in days and seconds between two tm or ASN1_TIME structures.
794 *) Add -rev test option to s_server to just reverse order of characters
795 received by client and send back to server. Also prints an abbreviated
796 summary of the connection parameters.
799 *) New option -brief for s_client and s_server to print out a brief summary
800 of connection parameters.
803 *) Add callbacks for arbitrary TLS extensions.
804 [Trevor Perrin <trevp@trevp.net> and Ben Laurie]
806 *) New option -crl_download in several openssl utilities to download CRLs
807 from CRLDP extension in certificates.
810 *) New options -CRL and -CRLform for s_client and s_server for CRLs.
813 *) New function X509_CRL_diff to generate a delta CRL from the difference
814 of two full CRLs. Add support to "crl" utility.
817 *) New functions to set lookup_crls function and to retrieve
818 X509_STORE from X509_STORE_CTX.
821 *) Print out deprecated issuer and subject unique ID fields in
825 *) Extend OCSP I/O functions so they can be used for simple general purpose
826 HTTP as well as OCSP. New wrapper function which can be used to download
827 CRLs using the OCSP API.
830 *) Delegate command line handling in s_client/s_server to SSL_CONF APIs.
833 *) SSL_CONF* functions. These provide a common framework for application
834 configuration using configuration files or command lines.
837 *) SSL/TLS tracing code. This parses out SSL/TLS records using the
838 message callback and prints the results. Needs compile time option
839 "enable-ssl-trace". New options to s_client and s_server to enable
843 *) New ctrl and macro to retrieve supported points extensions.
844 Print out extension in s_server and s_client.
847 *) New functions to retrieve certificate signature and signature
851 *) Add functions to retrieve and manipulate the raw cipherlist sent by a
855 *) New Suite B modes for TLS code. These use and enforce the requirements
856 of RFC6460: restrict ciphersuites, only permit Suite B algorithms and
857 only use Suite B curves. The Suite B modes can be set by using the
858 strings "SUITEB128", "SUITEB192" or "SUITEB128ONLY" for the cipherstring.
861 *) New chain verification flags for Suite B levels of security. Check
862 algorithms are acceptable when flags are set in X509_verify_cert.
865 *) Make tls1_check_chain return a set of flags indicating checks passed
866 by a certificate chain. Add additional tests to handle client
867 certificates: checks for matching certificate type and issuer name
871 *) If an attempt is made to use a signature algorithm not in the peer
872 preference list abort the handshake. If client has no suitable
873 signature algorithms in response to a certificate request do not
877 *) If server EC tmp key is not in client preference list abort handshake.
880 *) Add support for certificate stores in CERT structure. This makes it
881 possible to have different stores per SSL structure or one store in
882 the parent SSL_CTX. Include distint stores for certificate chain
883 verification and chain building. New ctrl SSL_CTRL_BUILD_CERT_CHAIN
884 to build and store a certificate chain in CERT structure: returing
885 an error if the chain cannot be built: this will allow applications
886 to test if a chain is correctly configured.
888 Note: if the CERT based stores are not set then the parent SSL_CTX
889 store is used to retain compatibility with existing behaviour.
893 *) New function ssl_set_client_disabled to set a ciphersuite disabled
894 mask based on the current session, check mask when sending client
895 hello and checking the requested ciphersuite.
898 *) New ctrls to retrieve and set certificate types in a certificate
899 request message. Print out received values in s_client. If certificate
900 types is not set with custom values set sensible values based on
901 supported signature algorithms.
904 *) Support for distinct client and server supported signature algorithms.
907 *) Add certificate callback. If set this is called whenever a certificate
908 is required by client or server. An application can decide which
909 certificate chain to present based on arbitrary criteria: for example
910 supported signature algorithms. Add very simple example to s_server.
911 This fixes many of the problems and restrictions of the existing client
912 certificate callback: for example you can now clear an existing
913 certificate and specify the whole chain.
916 *) Add new "valid_flags" field to CERT_PKEY structure which determines what
917 the certificate can be used for (if anything). Set valid_flags field
918 in new tls1_check_chain function. Simplify ssl_set_cert_masks which used
919 to have similar checks in it.
921 Add new "cert_flags" field to CERT structure and include a "strict mode".
922 This enforces some TLS certificate requirements (such as only permitting
923 certificate signature algorithms contained in the supported algorithms
924 extension) which some implementations ignore: this option should be used
925 with caution as it could cause interoperability issues.
928 *) Update and tidy signature algorithm extension processing. Work out
929 shared signature algorithms based on preferences and peer algorithms
930 and print them out in s_client and s_server. Abort handshake if no
931 shared signature algorithms.
934 *) Add new functions to allow customised supported signature algorithms
935 for SSL and SSL_CTX structures. Add options to s_client and s_server
939 *) New function SSL_certs_clear() to delete all references to certificates
940 from an SSL structure. Before this once a certificate had been added
941 it couldn't be removed.
944 *) Integrate hostname, email address and IP address checking with certificate
945 verification. New verify options supporting checking in opensl utility.
948 *) Fixes and wildcard matching support to hostname and email checking
949 functions. Add manual page.
950 [Florian Weimer (Red Hat Product Security Team)]
952 *) New functions to check a hostname email or IP address against a
953 certificate. Add options x509 utility to print results of checks against
957 *) Fix OCSP checking.
958 [Rob Stradling <rob.stradling@comodo.com> and Ben Laurie]
960 *) Initial experimental support for explicitly trusted non-root CAs.
961 OpenSSL still tries to build a complete chain to a root but if an
962 intermediate CA has a trust setting included that is used. The first
963 setting is used: whether to trust (e.g., -addtrust option to the x509
967 *) Add -trusted_first option which attempts to find certificates in the
968 trusted store even if an untrusted chain is also supplied.
971 *) MIPS assembly pack updates: support for MIPS32r2 and SmartMIPS ASE,
972 platform support for Linux and Android.
975 *) Support for linux-x32, ILP32 environment in x86_64 framework.
978 *) Experimental multi-implementation support for FIPS capable OpenSSL.
979 When in FIPS mode the approved implementations are used as normal,
980 when not in FIPS mode the internal unapproved versions are used instead.
981 This means that the FIPS capable OpenSSL isn't forced to use the
982 (often lower performance) FIPS implementations outside FIPS mode.
985 *) Transparently support X9.42 DH parameters when calling
986 PEM_read_bio_DHparameters. This means existing applications can handle
987 the new parameter format automatically.
990 *) Initial experimental support for X9.42 DH parameter format: mainly
991 to support use of 'q' parameter for RFC5114 parameters.
994 *) Add DH parameters from RFC5114 including test data to dhtest.
997 *) Support for automatic EC temporary key parameter selection. If enabled
998 the most preferred EC parameters are automatically used instead of
999 hardcoded fixed parameters. Now a server just has to call:
1000 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
1001 support ECDH and use the most appropriate parameters.
1004 *) Enhance and tidy EC curve and point format TLS extension code. Use
1005 static structures instead of allocation if default values are used.
1006 New ctrls to set curves we wish to support and to retrieve shared curves.
1007 Print out shared curves in s_server. New options to s_server and s_client
1008 to set list of supported curves.
1011 *) New ctrls to retrieve supported signature algorithms and
1012 supported curve values as an array of NIDs. Extend openssl utility
1013 to print out received values.
1016 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
1017 between NIDs and the more common NIST names such as "P-256". Enhance
1018 ecparam utility and ECC method to recognise the NIST names for curves.
1021 *) Enhance SSL/TLS certificate chain handling to support different
1022 chains for each certificate instead of one chain in the parent SSL_CTX.
1025 *) Support for fixed DH ciphersuite client authentication: where both
1026 server and client use DH certificates with common parameters.
1029 *) Support for fixed DH ciphersuites: those requiring DH server
1033 *) New function i2d_re_X509_tbs for re-encoding the TBS portion of
1035 Note: Related 1.0.2-beta specific macros X509_get_cert_info,
1036 X509_CINF_set_modified, X509_CINF_get_issuer, X509_CINF_get_extensions and
1037 X509_CINF_get_signature were reverted post internal team review.
1039 Changes between 1.0.1k and 1.0.1l [15 Jan 2015]
1041 *) Build fixes for the Windows and OpenVMS platforms
1042 [Matt Caswell and Richard Levitte]
1044 Changes between 1.0.1j and 1.0.1k [8 Jan 2015]
1046 *) Fix DTLS segmentation fault in dtls1_get_record. A carefully crafted DTLS
1047 message can cause a segmentation fault in OpenSSL due to a NULL pointer
1048 dereference. This could lead to a Denial Of Service attack. Thanks to
1049 Markus Stenberg of Cisco Systems, Inc. for reporting this issue.
1053 *) Fix DTLS memory leak in dtls1_buffer_record. A memory leak can occur in the
1054 dtls1_buffer_record function under certain conditions. In particular this
1055 could occur if an attacker sent repeated DTLS records with the same
1056 sequence number but for the next epoch. The memory leak could be exploited
1057 by an attacker in a Denial of Service attack through memory exhaustion.
1058 Thanks to Chris Mueller for reporting this issue.
1062 *) Fix issue where no-ssl3 configuration sets method to NULL. When openssl is
1063 built with the no-ssl3 option and a SSL v3 ClientHello is received the ssl
1064 method would be set to NULL which could later result in a NULL pointer
1065 dereference. Thanks to Frank Schmirler for reporting this issue.
1069 *) Abort handshake if server key exchange message is omitted for ephemeral
1072 Thanks to Karthikeyan Bhargavan of the PROSECCO team at INRIA for
1073 reporting this issue.
1077 *) Remove non-export ephemeral RSA code on client and server. This code
1078 violated the TLS standard by allowing the use of temporary RSA keys in
1079 non-export ciphersuites and could be used by a server to effectively
1080 downgrade the RSA key length used to a value smaller than the server
1081 certificate. Thanks for Karthikeyan Bhargavan of the PROSECCO team at
1082 INRIA or reporting this issue.
1086 *) Fixed issue where DH client certificates are accepted without verification.
1087 An OpenSSL server will accept a DH certificate for client authentication
1088 without the certificate verify message. This effectively allows a client to
1089 authenticate without the use of a private key. This only affects servers
1090 which trust a client certificate authority which issues certificates
1091 containing DH keys: these are extremely rare and hardly ever encountered.
1092 Thanks for Karthikeyan Bhargavan of the PROSECCO team at INRIA or reporting
1097 *) Ensure that the session ID context of an SSL is updated when its
1098 SSL_CTX is updated via SSL_set_SSL_CTX.
1100 The session ID context is typically set from the parent SSL_CTX,
1101 and can vary with the CTX.
1104 *) Fix various certificate fingerprint issues.
1106 By using non-DER or invalid encodings outside the signed portion of a
1107 certificate the fingerprint can be changed without breaking the signature.
1108 Although no details of the signed portion of the certificate can be changed
1109 this can cause problems with some applications: e.g. those using the
1110 certificate fingerprint for blacklists.
1112 1. Reject signatures with non zero unused bits.
1114 If the BIT STRING containing the signature has non zero unused bits reject
1115 the signature. All current signature algorithms require zero unused bits.
1117 2. Check certificate algorithm consistency.
1119 Check the AlgorithmIdentifier inside TBS matches the one in the
1120 certificate signature. NB: this will result in signature failure
1121 errors for some broken certificates.
1123 Thanks to Konrad Kraszewski from Google for reporting this issue.
1125 3. Check DSA/ECDSA signatures use DER.
1127 Reencode DSA/ECDSA signatures and compare with the original received
1128 signature. Return an error if there is a mismatch.
1130 This will reject various cases including garbage after signature
1131 (thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
1132 program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
1133 (negative or with leading zeroes).
1135 Further analysis was conducted and fixes were developed by Stephen Henson
1136 of the OpenSSL core team.
1141 *) Correct Bignum squaring. Bignum squaring (BN_sqr) may produce incorrect
1142 results on some platforms, including x86_64. This bug occurs at random
1143 with a very low probability, and is not known to be exploitable in any
1144 way, though its exact impact is difficult to determine. Thanks to Pieter
1145 Wuille (Blockstream) who reported this issue and also suggested an initial
1146 fix. Further analysis was conducted by the OpenSSL development team and
1147 Adam Langley of Google. The final fix was developed by Andy Polyakov of
1148 the OpenSSL core team.
1152 *) Do not resume sessions on the server if the negotiated protocol
1153 version does not match the session's version. Resuming with a different
1154 version, while not strictly forbidden by the RFC, is of questionable
1155 sanity and breaks all known clients.
1156 [David Benjamin, Emilia Käsper]
1158 *) Tighten handling of the ChangeCipherSpec (CCS) message: reject
1159 early CCS messages during renegotiation. (Note that because
1160 renegotiation is encrypted, this early CCS was not exploitable.)
1163 *) Tighten client-side session ticket handling during renegotiation:
1164 ensure that the client only accepts a session ticket if the server sends
1165 the extension anew in the ServerHello. Previously, a TLS client would
1166 reuse the old extension state and thus accept a session ticket if one was
1167 announced in the initial ServerHello.
1169 Similarly, ensure that the client requires a session ticket if one
1170 was advertised in the ServerHello. Previously, a TLS client would
1171 ignore a missing NewSessionTicket message.
1174 Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
1176 *) SRTP Memory Leak.
1178 A flaw in the DTLS SRTP extension parsing code allows an attacker, who
1179 sends a carefully crafted handshake message, to cause OpenSSL to fail
1180 to free up to 64k of memory causing a memory leak. This could be
1181 exploited in a Denial Of Service attack. This issue affects OpenSSL
1182 1.0.1 server implementations for both SSL/TLS and DTLS regardless of
1183 whether SRTP is used or configured. Implementations of OpenSSL that
1184 have been compiled with OPENSSL_NO_SRTP defined are not affected.
1186 The fix was developed by the OpenSSL team.
1190 *) Session Ticket Memory Leak.
1192 When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
1193 integrity of that ticket is first verified. In the event of a session
1194 ticket integrity check failing, OpenSSL will fail to free memory
1195 causing a memory leak. By sending a large number of invalid session
1196 tickets an attacker could exploit this issue in a Denial Of Service
1201 *) Build option no-ssl3 is incomplete.
1203 When OpenSSL is configured with "no-ssl3" as a build option, servers
1204 could accept and complete a SSL 3.0 handshake, and clients could be
1205 configured to send them.
1207 [Akamai and the OpenSSL team]
1209 *) Add support for TLS_FALLBACK_SCSV.
1210 Client applications doing fallback retries should call
1211 SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
1213 [Adam Langley, Bodo Moeller]
1215 *) Add additional DigestInfo checks.
1217 Reencode DigestInto in DER and check against the original when
1218 verifying RSA signature: this will reject any improperly encoded
1219 DigestInfo structures.
1221 Note: this is a precautionary measure and no attacks are currently known.
1225 Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
1227 *) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
1228 SRP code can be overrun an internal buffer. Add sanity check that
1229 g, A, B < N to SRP code.
1231 Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
1232 Group for discovering this issue.
1236 *) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
1237 TLS 1.0 instead of higher protocol versions when the ClientHello message
1238 is badly fragmented. This allows a man-in-the-middle attacker to force a
1239 downgrade to TLS 1.0 even if both the server and the client support a
1240 higher protocol version, by modifying the client's TLS records.
1242 Thanks to David Benjamin and Adam Langley (Google) for discovering and
1243 researching this issue.
1247 *) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
1248 to a denial of service attack. A malicious server can crash the client
1249 with a null pointer dereference (read) by specifying an anonymous (EC)DH
1250 ciphersuite and sending carefully crafted handshake messages.
1252 Thanks to Felix Gröbert (Google) for discovering and researching this
1257 *) By sending carefully crafted DTLS packets an attacker could cause openssl
1258 to leak memory. This can be exploited through a Denial of Service attack.
1259 Thanks to Adam Langley for discovering and researching this issue.
1263 *) An attacker can force openssl to consume large amounts of memory whilst
1264 processing DTLS handshake messages. This can be exploited through a
1265 Denial of Service attack.
1266 Thanks to Adam Langley for discovering and researching this issue.
1270 *) An attacker can force an error condition which causes openssl to crash
1271 whilst processing DTLS packets due to memory being freed twice. This
1272 can be exploited through a Denial of Service attack.
1273 Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
1278 *) If a multithreaded client connects to a malicious server using a resumed
1279 session and the server sends an ec point format extension it could write
1280 up to 255 bytes to freed memory.
1282 Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
1287 *) A malicious server can crash an OpenSSL client with a null pointer
1288 dereference (read) by specifying an SRP ciphersuite even though it was not
1289 properly negotiated with the client. This can be exploited through a
1290 Denial of Service attack.
1292 Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
1293 discovering and researching this issue.
1297 *) A flaw in OBJ_obj2txt may cause pretty printing functions such as
1298 X509_name_oneline, X509_name_print_ex et al. to leak some information
1299 from the stack. Applications may be affected if they echo pretty printing
1300 output to the attacker.
1302 Thanks to Ivan Fratric (Google) for discovering this issue.
1304 [Emilia Käsper, and Steve Henson]
1306 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
1307 for corner cases. (Certain input points at infinity could lead to
1308 bogus results, with non-infinity inputs mapped to infinity too.)
1311 Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
1313 *) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
1314 handshake can force the use of weak keying material in OpenSSL
1315 SSL/TLS clients and servers.
1317 Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
1318 researching this issue. (CVE-2014-0224)
1319 [KIKUCHI Masashi, Steve Henson]
1321 *) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
1322 OpenSSL DTLS client the code can be made to recurse eventually crashing
1325 Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
1327 [Imre Rad, Steve Henson]
1329 *) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
1330 be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
1331 client or server. This is potentially exploitable to run arbitrary
1332 code on a vulnerable client or server.
1334 Thanks to Jüri Aedla for reporting this issue. (CVE-2014-0195)
1335 [Jüri Aedla, Steve Henson]
1337 *) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
1338 are subject to a denial of service attack.
1340 Thanks to Felix Gröbert and Ivan Fratric at Google for discovering
1341 this issue. (CVE-2014-3470)
1342 [Felix Gröbert, Ivan Fratric, Steve Henson]
1344 *) Harmonize version and its documentation. -f flag is used to display
1346 [mancha <mancha1@zoho.com>]
1348 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
1349 in i2d_ECPrivateKey.
1350 [mancha <mancha1@zoho.com>]
1352 *) Fix some double frees. These are not thought to be exploitable.
1353 [mancha <mancha1@zoho.com>]
1355 Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
1357 *) A missing bounds check in the handling of the TLS heartbeat extension
1358 can be used to reveal up to 64k of memory to a connected client or
1361 Thanks for Neel Mehta of Google Security for discovering this bug and to
1362 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
1363 preparing the fix (CVE-2014-0160)
1364 [Adam Langley, Bodo Moeller]
1366 *) Fix for the attack described in the paper "Recovering OpenSSL
1367 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
1368 by Yuval Yarom and Naomi Benger. Details can be obtained from:
1369 http://eprint.iacr.org/2014/140
1371 Thanks to Yuval Yarom and Naomi Benger for discovering this
1372 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
1373 [Yuval Yarom and Naomi Benger]
1375 *) TLS pad extension: draft-agl-tls-padding-03
1377 Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
1378 TLS client Hello record length value would otherwise be > 255 and
1379 less that 512 pad with a dummy extension containing zeroes so it
1380 is at least 512 bytes long.
1382 [Adam Langley, Steve Henson]
1384 Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
1386 *) Fix for TLS record tampering bug. A carefully crafted invalid
1387 handshake could crash OpenSSL with a NULL pointer exception.
1388 Thanks to Anton Johansson for reporting this issues.
1391 *) Keep original DTLS digest and encryption contexts in retransmission
1392 structures so we can use the previous session parameters if they need
1393 to be resent. (CVE-2013-6450)
1396 *) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
1397 avoids preferring ECDHE-ECDSA ciphers when the client appears to be
1398 Safari on OS X. Safari on OS X 10.8..10.8.3 advertises support for
1399 several ECDHE-ECDSA ciphers, but fails to negotiate them. The bug
1400 is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
1401 10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
1402 [Rob Stradling, Adam Langley]
1404 Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
1406 *) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
1407 supporting platforms or when small records were transferred.
1408 [Andy Polyakov, Steve Henson]
1410 Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
1412 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
1414 This addresses the flaw in CBC record processing discovered by
1415 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
1416 at: http://www.isg.rhul.ac.uk/tls/
1418 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1419 Security Group at Royal Holloway, University of London
1420 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
1421 Emilia Käsper for the initial patch.
1423 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
1425 *) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
1426 ciphersuites which can be exploited in a denial of service attack.
1427 Thanks go to and to Adam Langley <agl@chromium.org> for discovering
1428 and detecting this bug and to Wolfgang Ettlinger
1429 <wolfgang.ettlinger@gmail.com> for independently discovering this issue.
1433 *) Return an error when checking OCSP signatures when key is NULL.
1434 This fixes a DoS attack. (CVE-2013-0166)
1437 *) Make openssl verify return errors.
1438 [Chris Palmer <palmer@google.com> and Ben Laurie]
1440 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
1441 the right response is stapled. Also change SSL_get_certificate()
1442 so it returns the certificate actually sent.
1443 See http://rt.openssl.org/Ticket/Display.html?id=2836.
1444 [Rob Stradling <rob.stradling@comodo.com>]
1446 *) Fix possible deadlock when decoding public keys.
1449 *) Don't use TLS 1.0 record version number in initial client hello
1453 Changes between 1.0.1b and 1.0.1c [10 May 2012]
1455 *) Sanity check record length before skipping explicit IV in TLS
1456 1.2, 1.1 and DTLS to fix DoS attack.
1458 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
1459 fuzzing as a service testing platform.
1463 *) Initialise tkeylen properly when encrypting CMS messages.
1464 Thanks to Solar Designer of Openwall for reporting this issue.
1467 *) In FIPS mode don't try to use composite ciphers as they are not
1471 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
1473 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
1474 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
1475 mean any application compiled against OpenSSL 1.0.0 headers setting
1476 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
1477 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
1478 0x10000000L Any application which was previously compiled against
1479 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
1480 will need to be recompiled as a result. Letting be results in
1481 inability to disable specifically TLS 1.1 and in client context,
1482 in unlike event, limit maximum offered version to TLS 1.0 [see below].
1485 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
1486 disable just protocol X, but all protocols above X *if* there are
1487 protocols *below* X still enabled. In more practical terms it means
1488 that if application wants to disable TLS1.0 in favor of TLS1.1 and
1489 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
1490 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
1494 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
1496 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
1497 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
1498 in CRYPTO_realloc_clean.
1500 Thanks to Tavis Ormandy, Google Security Team, for discovering this
1501 issue and to Adam Langley <agl@chromium.org> for fixing it.
1503 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
1505 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
1508 *) Workarounds for some broken servers that "hang" if a client hello
1509 record length exceeds 255 bytes.
1511 1. Do not use record version number > TLS 1.0 in initial client
1512 hello: some (but not all) hanging servers will now work.
1513 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
1514 the number of ciphers sent in the client hello. This should be
1515 set to an even number, such as 50, for example by passing:
1516 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
1517 Most broken servers should now work.
1518 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
1519 TLS 1.2 client support entirely.
1522 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
1525 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
1527 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
1528 STRING form instead of a DigestInfo.
1531 *) The format used for MDC2 RSA signatures is inconsistent between EVP
1532 and the RSA_sign/RSA_verify functions. This was made more apparent when
1533 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
1534 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
1535 the correct format in RSA_verify so both forms transparently work.
1538 *) Some servers which support TLS 1.0 can choke if we initially indicate
1539 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
1540 encrypted premaster secret. As a workaround use the maximum permitted
1541 client version in client hello, this should keep such servers happy
1542 and still work with previous versions of OpenSSL.
1545 *) Add support for TLS/DTLS heartbeats.
1546 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1548 *) Add support for SCTP.
1549 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1551 *) Improved PRNG seeding for VOS.
1552 [Paul Green <Paul.Green@stratus.com>]
1554 *) Extensive assembler packs updates, most notably:
1556 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
1557 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
1558 - x86_64: bit-sliced AES implementation;
1559 - ARM: NEON support, contemporary platforms optimizations;
1560 - s390x: z196 support;
1561 - *: GHASH and GF(2^m) multiplication implementations;
1565 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
1566 (removal of unnecessary code)
1567 [Peter Sylvester <peter.sylvester@edelweb.fr>]
1569 *) Add TLS key material exporter from RFC 5705.
1572 *) Add DTLS-SRTP negotiation from RFC 5764.
1575 *) Add Next Protocol Negotiation,
1576 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
1577 disabled with a no-npn flag to config or Configure. Code donated
1579 [Adam Langley <agl@google.com> and Ben Laurie]
1581 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
1582 NIST-P256, NIST-P521, with constant-time single point multiplication on
1583 typical inputs. Compiler support for the nonstandard type __uint128_t is
1584 required to use this (present in gcc 4.4 and later, for 64-bit builds).
1585 Code made available under Apache License version 2.0.
1587 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
1588 line to include this in your build of OpenSSL, and run "make depend" (or
1589 "make update"). This enables the following EC_METHODs:
1591 EC_GFp_nistp224_method()
1592 EC_GFp_nistp256_method()
1593 EC_GFp_nistp521_method()
1595 EC_GROUP_new_by_curve_name() will automatically use these (while
1596 EC_GROUP_new_curve_GFp() currently prefers the more flexible
1598 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
1600 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
1601 all platforms. Move ssize_t definition from e_os.h to the public
1602 header file e_os2.h as it now appears in public header file cms.h
1605 *) New -sigopt option to the ca, req and x509 utilities. Additional
1606 signature parameters can be passed using this option and in
1610 *) Add RSA PSS signing function. This will generate and set the
1611 appropriate AlgorithmIdentifiers for PSS based on those in the
1612 corresponding EVP_MD_CTX structure. No application support yet.
1615 *) Support for companion algorithm specific ASN1 signing routines.
1616 New function ASN1_item_sign_ctx() signs a pre-initialised
1617 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
1618 the appropriate parameters.
1621 *) Add new algorithm specific ASN1 verification initialisation function
1622 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
1623 handling will be the same no matter what EVP_PKEY_METHOD is used.
1624 Add a PSS handler to support verification of PSS signatures: checked
1625 against a number of sample certificates.
1628 *) Add signature printing for PSS. Add PSS OIDs.
1629 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
1631 *) Add algorithm specific signature printing. An individual ASN1 method
1632 can now print out signatures instead of the standard hex dump.
1634 More complex signatures (e.g. PSS) can print out more meaningful
1635 information. Include DSA version that prints out the signature
1639 *) Password based recipient info support for CMS library: implementing
1643 *) Split password based encryption into PBES2 and PBKDF2 functions. This
1644 neatly separates the code into cipher and PBE sections and is required
1645 for some algorithms that split PBES2 into separate pieces (such as
1646 password based CMS).
1649 *) Session-handling fixes:
1650 - Fix handling of connections that are resuming with a session ID,
1651 but also support Session Tickets.
1652 - Fix a bug that suppressed issuing of a new ticket if the client
1653 presented a ticket with an expired session.
1654 - Try to set the ticket lifetime hint to something reasonable.
1655 - Make tickets shorter by excluding irrelevant information.
1656 - On the client side, don't ignore renewed tickets.
1657 [Adam Langley, Bodo Moeller (Google)]
1659 *) Fix PSK session representation.
1662 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
1664 This work was sponsored by Intel.
1667 *) Add GCM support to TLS library. Some custom code is needed to split
1668 the IV between the fixed (from PRF) and explicit (from TLS record)
1669 portions. This adds all GCM ciphersuites supported by RFC5288 and
1670 RFC5289. Generalise some AES* cipherstrings to include GCM and
1671 add a special AESGCM string for GCM only.
1674 *) Expand range of ctrls for AES GCM. Permit setting invocation
1675 field on decrypt and retrieval of invocation field only on encrypt.
1678 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
1679 As required by RFC5289 these ciphersuites cannot be used if for
1680 versions of TLS earlier than 1.2.
1683 *) For FIPS capable OpenSSL interpret a NULL default public key method
1684 as unset and return the appropriate default but do *not* set the default.
1685 This means we can return the appropriate method in applications that
1686 switch between FIPS and non-FIPS modes.
1689 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
1690 ENGINE is used then we cannot handle that in the FIPS module so we
1691 keep original code iff non-FIPS operations are allowed.
1694 *) Add -attime option to openssl utilities.
1695 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
1697 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
1700 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
1701 FIPS EC methods unconditionally for now.
1704 *) New build option no-ec2m to disable characteristic 2 code.
1707 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
1708 all cases can be covered as some introduce binary incompatibilities.
1711 *) Redirect RSA operations to FIPS module including keygen,
1712 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
1715 *) Add similar low level API blocking to ciphers.
1718 *) Low level digest APIs are not approved in FIPS mode: any attempt
1719 to use these will cause a fatal error. Applications that *really* want
1720 to use them can use the private_* version instead.
1723 *) Redirect cipher operations to FIPS module for FIPS builds.
1726 *) Redirect digest operations to FIPS module for FIPS builds.
1729 *) Update build system to add "fips" flag which will link in fipscanister.o
1730 for static and shared library builds embedding a signature if needed.
1733 *) Output TLS supported curves in preference order instead of numerical
1734 order. This is currently hardcoded for the highest order curves first.
1735 This should be configurable so applications can judge speed vs strength.
1738 *) Add TLS v1.2 server support for client authentication.
1741 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
1745 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
1746 FIPS modules versions.
1749 *) Add TLS v1.2 client side support for client authentication. Keep cache
1750 of handshake records longer as we don't know the hash algorithm to use
1751 until after the certificate request message is received.
1754 *) Initial TLS v1.2 client support. Add a default signature algorithms
1755 extension including all the algorithms we support. Parse new signature
1756 format in client key exchange. Relax some ECC signing restrictions for
1757 TLS v1.2 as indicated in RFC5246.
1760 *) Add server support for TLS v1.2 signature algorithms extension. Switch
1761 to new signature format when needed using client digest preference.
1762 All server ciphersuites should now work correctly in TLS v1.2. No client
1763 support yet and no support for client certificates.
1766 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
1767 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
1768 ciphersuites. At present only RSA key exchange ciphersuites work with
1769 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
1770 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
1771 and version checking.
1774 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
1775 with this defined it will not be affected by any changes to ssl internal
1776 structures. Add several utility functions to allow openssl application
1777 to work with OPENSSL_NO_SSL_INTERN defined.
1781 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
1783 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
1786 *) Permit abbreviated handshakes when renegotiating using the function
1787 SSL_renegotiate_abbreviated().
1788 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1790 *) Add call to ENGINE_register_all_complete() to
1791 ENGINE_load_builtin_engines(), so some implementations get used
1792 automatically instead of needing explicit application support.
1795 *) Add support for TLS key exporter as described in RFC5705.
1796 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
1798 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
1799 a few changes are required:
1801 Add SSL_OP_NO_TLSv1_1 flag.
1802 Add TLSv1_1 methods.
1803 Update version checking logic to handle version 1.1.
1804 Add explicit IV handling (ported from DTLS code).
1805 Add command line options to s_client/s_server.
1808 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
1810 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
1811 in CMS and PKCS7 code. When RSA decryption fails use a random key for
1812 content decryption and always return the same error. Note: this attack
1813 needs on average 2^20 messages so it only affects automated senders. The
1814 old behaviour can be reenabled in the CMS code by setting the
1815 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
1816 an MMA defence is not necessary.
1817 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
1818 this issue. (CVE-2012-0884)
1821 *) Fix CVE-2011-4619: make sure we really are receiving a
1822 client hello before rejecting multiple SGC restarts. Thanks to
1823 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
1826 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
1828 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1829 Thanks to Antonio Martin, Enterprise Secure Access Research and
1830 Development, Cisco Systems, Inc. for discovering this bug and
1831 preparing a fix. (CVE-2012-0050)
1834 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
1836 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1837 of the Vaudenay padding oracle attack on CBC mode encryption
1838 which enables an efficient plaintext recovery attack against
1839 the OpenSSL implementation of DTLS. Their attack exploits timing
1840 differences arising during decryption processing. A research
1841 paper describing this attack can be found at:
1842 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1843 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1844 Security Group at Royal Holloway, University of London
1845 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1846 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1847 for preparing the fix. (CVE-2011-4108)
1848 [Robin Seggelmann, Michael Tuexen]
1850 *) Clear bytes used for block padding of SSL 3.0 records.
1852 [Adam Langley (Google)]
1854 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1855 Kadianakis <desnacked@gmail.com> for discovering this issue and
1856 Adam Langley for preparing the fix. (CVE-2011-4619)
1857 [Adam Langley (Google)]
1859 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
1860 [Andrey Kulikov <amdeich@gmail.com>]
1862 *) Prevent malformed RFC3779 data triggering an assertion failure.
1863 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1864 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1865 [Rob Austein <sra@hactrn.net>]
1867 *) Improved PRNG seeding for VOS.
1868 [Paul Green <Paul.Green@stratus.com>]
1870 *) Fix ssl_ciph.c set-up race.
1871 [Adam Langley (Google)]
1873 *) Fix spurious failures in ecdsatest.c.
1874 [Emilia Käsper (Google)]
1876 *) Fix the BIO_f_buffer() implementation (which was mixing different
1877 interpretations of the '..._len' fields).
1878 [Adam Langley (Google)]
1880 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1881 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1882 threads won't reuse the same blinding coefficients.
1884 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1885 lock to call BN_BLINDING_invert_ex, and avoids one use of
1886 BN_BLINDING_update for each BN_BLINDING structure (previously,
1887 the last update always remained unused).
1888 [Emilia Käsper (Google)]
1890 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
1891 [Bob Buckholz (Google)]
1893 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
1895 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
1896 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
1897 [Kaspar Brand <ossl@velox.ch>]
1899 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1900 for multi-threaded use of ECDH. (CVE-2011-3210)
1901 [Adam Langley (Google)]
1903 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1906 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
1907 signature public key algorithm by using OID xref utilities instead.
1908 Before this you could only use some ECC ciphersuites with SHA1 only.
1911 *) Add protection against ECDSA timing attacks as mentioned in the paper
1912 by Billy Bob Brumley and Nicola Tuveri, see:
1914 http://eprint.iacr.org/2011/232.pdf
1916 [Billy Bob Brumley and Nicola Tuveri]
1918 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
1920 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1921 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1923 *) Fix bug in string printing code: if *any* escaping is enabled we must
1924 escape the escape character (backslash) or the resulting string is
1928 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
1930 *) Disable code workaround for ancient and obsolete Netscape browsers
1931 and servers: an attacker can use it in a ciphersuite downgrade attack.
1932 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1935 *) Fixed J-PAKE implementation error, originally discovered by
1936 Sebastien Martini, further info and confirmation from Stefan
1937 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1940 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
1942 *) Fix extension code to avoid race conditions which can result in a buffer
1943 overrun vulnerability: resumed sessions must not be modified as they can
1944 be shared by multiple threads. CVE-2010-3864
1947 *) Fix WIN32 build system to correctly link an ENGINE directory into
1951 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
1953 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
1955 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
1957 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
1959 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
1960 context. The operation can be customised via the ctrl mechanism in
1961 case ENGINEs want to include additional functionality.
1964 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
1967 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
1968 output hashes compatible with older versions of OpenSSL.
1969 [Willy Weisz <weisz@vcpc.univie.ac.at>]
1971 *) Fix compression algorithm handling: if resuming a session use the
1972 compression algorithm of the resumed session instead of determining
1973 it from client hello again. Don't allow server to change algorithm.
1976 *) Add load_crls() function to apps tidying load_certs() too. Add option
1977 to verify utility to allow additional CRLs to be included.
1980 *) Update OCSP request code to permit adding custom headers to the request:
1981 some responders need this.
1984 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
1986 [Julia Lawall <julia@diku.dk>]
1988 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
1989 needlessly dereferenced structures, used obsolete functions and
1990 didn't handle all updated verify codes correctly.
1993 *) Disable MD2 in the default configuration.
1996 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
1997 indicate the initial BIO being pushed or popped. This makes it possible
1998 to determine whether the BIO is the one explicitly called or as a result
1999 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
2000 it handles reference counts correctly and doesn't zero out the I/O bio
2001 when it is not being explicitly popped. WARNING: applications which
2002 included workarounds for the old buggy behaviour will need to be modified
2003 or they could free up already freed BIOs.
2006 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
2007 renaming to all platforms (within the 0.9.8 branch, this was
2008 done conditionally on Netware platforms to avoid a name clash).
2009 [Guenter <lists@gknw.net>]
2011 *) Add ECDHE and PSK support to DTLS.
2012 [Michael Tuexen <tuexen@fh-muenster.de>]
2014 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
2018 *) Add "missing" function EVP_MD_flags() (without this the only way to
2019 retrieve a digest flags is by accessing the structure directly. Update
2020 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
2021 or cipher is registered as in the "from" argument. Print out all
2022 registered digests in the dgst usage message instead of manually
2023 attempting to work them out.
2026 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
2027 this allows the use of compression and extensions. Change default cipher
2028 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
2029 by default unless an application cipher string requests it.
2032 *) Alter match criteria in PKCS12_parse(). It used to try to use local
2033 key ids to find matching certificates and keys but some PKCS#12 files
2034 don't follow the (somewhat unwritten) rules and this strategy fails.
2035 Now just gather all certificates together and the first private key
2036 then look for the first certificate that matches the key.
2039 *) Support use of registered digest and cipher names for dgst and cipher
2040 commands instead of having to add each one as a special case. So now
2047 openssl dgst -sha256 foo
2049 and this works for ENGINE based algorithms too.
2053 *) Update Gost ENGINE to support parameter files.
2054 [Victor B. Wagner <vitus@cryptocom.ru>]
2056 *) Support GeneralizedTime in ca utility.
2057 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
2059 *) Enhance the hash format used for certificate directory links. The new
2060 form uses the canonical encoding (meaning equivalent names will work
2061 even if they aren't identical) and uses SHA1 instead of MD5. This form
2062 is incompatible with the older format and as a result c_rehash should
2063 be used to rebuild symbolic links.
2066 *) Make PKCS#8 the default write format for private keys, replacing the
2067 traditional format. This form is standardised, more secure and doesn't
2068 include an implicit MD5 dependency.
2071 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
2072 committed to OpenSSL should pass this lot as a minimum.
2075 *) Add session ticket override functionality for use by EAP-FAST.
2076 [Jouni Malinen <j@w1.fi>]
2078 *) Modify HMAC functions to return a value. Since these can be implemented
2079 in an ENGINE errors can occur.
2082 *) Type-checked OBJ_bsearch_ex.
2085 *) Type-checked OBJ_bsearch. Also some constification necessitated
2086 by type-checking. Still to come: TXT_DB, bsearch(?),
2087 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
2091 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
2092 seconds to a tm structure directly, instead of going through OS
2093 specific date routines. This avoids any issues with OS routines such
2094 as the year 2038 bug. New *_adj() functions for ASN1 time structures
2095 and X509_time_adj_ex() to cover the extended range. The existing
2096 X509_time_adj() is still usable and will no longer have any date issues.
2099 *) Delta CRL support. New use deltas option which will attempt to locate
2100 and search any appropriate delta CRLs available.
2102 This work was sponsored by Google.
2105 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
2106 code and add additional score elements. Validate alternate CRL paths
2107 as part of the CRL checking and indicate a new error "CRL path validation
2108 error" in this case. Applications wanting additional details can use
2109 the verify callback and check the new "parent" field. If this is not
2110 NULL CRL path validation is taking place. Existing applications wont
2111 see this because it requires extended CRL support which is off by
2114 This work was sponsored by Google.
2117 *) Support for freshest CRL extension.
2119 This work was sponsored by Google.
2122 *) Initial indirect CRL support. Currently only supported in the CRLs
2123 passed directly and not via lookup. Process certificate issuer
2124 CRL entry extension and lookup CRL entries by bother issuer name
2125 and serial number. Check and process CRL issuer entry in IDP extension.
2127 This work was sponsored by Google.
2130 *) Add support for distinct certificate and CRL paths. The CRL issuer
2131 certificate is validated separately in this case. Only enabled if
2132 an extended CRL support flag is set: this flag will enable additional
2133 CRL functionality in future.
2135 This work was sponsored by Google.
2138 *) Add support for policy mappings extension.
2140 This work was sponsored by Google.
2143 *) Fixes to pathlength constraint, self issued certificate handling,
2144 policy processing to align with RFC3280 and PKITS tests.
2146 This work was sponsored by Google.
2149 *) Support for name constraints certificate extension. DN, email, DNS
2150 and URI types are currently supported.
2152 This work was sponsored by Google.
2155 *) To cater for systems that provide a pointer-based thread ID rather
2156 than numeric, deprecate the current numeric thread ID mechanism and
2157 replace it with a structure and associated callback type. This
2158 mechanism allows a numeric "hash" to be extracted from a thread ID in
2159 either case, and on platforms where pointers are larger than 'long',
2160 mixing is done to help ensure the numeric 'hash' is usable even if it
2161 can't be guaranteed unique. The default mechanism is to use "&errno"
2162 as a pointer-based thread ID to distinguish between threads.
2164 Applications that want to provide their own thread IDs should now use
2165 CRYPTO_THREADID_set_callback() to register a callback that will call
2166 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
2168 Note that ERR_remove_state() is now deprecated, because it is tied
2169 to the assumption that thread IDs are numeric. ERR_remove_state(0)
2170 to free the current thread's error state should be replaced by
2171 ERR_remove_thread_state(NULL).
2173 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
2174 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
2175 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
2176 application was previously providing a numeric thread callback that
2177 was inappropriate for distinguishing threads, then uniqueness might
2178 have been obtained with &errno that happened immediately in the
2179 intermediate development versions of OpenSSL; this is no longer the
2180 case, the numeric thread callback will now override the automatic use
2182 [Geoff Thorpe, with help from Bodo Moeller]
2184 *) Initial support for different CRL issuing certificates. This covers a
2185 simple case where the self issued certificates in the chain exist and
2186 the real CRL issuer is higher in the existing chain.
2188 This work was sponsored by Google.
2191 *) Removed effectively defunct crypto/store from the build.
2194 *) Revamp of STACK to provide stronger type-checking. Still to come:
2195 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
2196 ASN1_STRING, CONF_VALUE.
2199 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
2200 RAM on SSL connections. This option can save about 34k per idle SSL.
2203 *) Revamp of LHASH to provide stronger type-checking. Still to come:
2204 STACK, TXT_DB, bsearch, qsort.
2207 *) Initial support for Cryptographic Message Syntax (aka CMS) based
2208 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
2209 support for data, signedData, compressedData, digestedData and
2210 encryptedData, envelopedData types included. Scripts to check against
2211 RFC4134 examples draft and interop and consistency checks of many
2212 content types and variants.
2215 *) Add options to enc utility to support use of zlib compression BIO.
2218 *) Extend mk1mf to support importing of options and assembly language
2219 files from Configure script, currently only included in VC-WIN32.
2220 The assembly language rules can now optionally generate the source
2221 files from the associated perl scripts.
2224 *) Implement remaining functionality needed to support GOST ciphersuites.
2225 Interop testing has been performed using CryptoPro implementations.
2226 [Victor B. Wagner <vitus@cryptocom.ru>]
2228 *) s390x assembler pack.
2231 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
2235 *) Implement Opaque PRF Input TLS extension as specified in
2236 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
2237 official specification yet and no extension type assignment by
2238 IANA exists, this extension (for now) will have to be explicitly
2239 enabled when building OpenSSL by providing the extension number
2240 to use. For example, specify an option
2242 -DTLSEXT_TYPE_opaque_prf_input=0x9527
2244 to the "config" or "Configure" script to enable the extension,
2245 assuming extension number 0x9527 (which is a completely arbitrary
2246 and unofficial assignment based on the MD5 hash of the Internet
2247 Draft). Note that by doing so, you potentially lose
2248 interoperability with other TLS implementations since these might
2249 be using the same extension number for other purposes.
2251 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
2252 opaque PRF input value to use in the handshake. This will create
2253 an interal copy of the length-'len' string at 'src', and will
2254 return non-zero for success.
2256 To get more control and flexibility, provide a callback function
2259 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
2260 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
2264 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
2267 Callback function 'cb' will be called in handshakes, and is
2268 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
2269 Argument 'arg' is for application purposes (the value as given to
2270 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
2271 be provided to the callback function). The callback function
2272 has to return non-zero to report success: usually 1 to use opaque
2273 PRF input just if possible, or 2 to enforce use of the opaque PRF
2274 input. In the latter case, the library will abort the handshake
2275 if opaque PRF input is not successfully negotiated.
2277 Arguments 'peerinput' and 'len' given to the callback function
2278 will always be NULL and 0 in the case of a client. A server will
2279 see the client's opaque PRF input through these variables if
2280 available (NULL and 0 otherwise). Note that if the server
2281 provides an opaque PRF input, the length must be the same as the
2282 length of the client's opaque PRF input.
2284 Note that the callback function will only be called when creating
2285 a new session (session resumption can resume whatever was
2286 previously negotiated), and will not be called in SSL 2.0
2287 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
2288 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
2289 for applications that need to enforce opaque PRF input.
2293 *) Update ssl code to support digests other than SHA1+MD5 for handshake
2296 [Victor B. Wagner <vitus@cryptocom.ru>]
2298 *) Add RFC4507 support to OpenSSL. This includes the corrections in
2299 RFC4507bis. The encrypted ticket format is an encrypted encoded
2300 SSL_SESSION structure, that way new session features are automatically
2303 If a client application caches session in an SSL_SESSION structure
2304 support is transparent because tickets are now stored in the encoded
2307 The SSL_CTX structure automatically generates keys for ticket
2308 protection in servers so again support should be possible
2309 with no application modification.
2311 If a client or server wishes to disable RFC4507 support then the option
2312 SSL_OP_NO_TICKET can be set.
2314 Add a TLS extension debugging callback to allow the contents of any client
2315 or server extensions to be examined.
2317 This work was sponsored by Google.
2320 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
2321 OpenSSL should now compile cleanly on gcc 4.2
2322 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
2324 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
2325 support including streaming MAC support: this is required for GOST
2326 ciphersuite support.
2327 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
2329 *) Add option -stream to use PKCS#7 streaming in smime utility. New
2330 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
2331 to output in BER and PEM format.
2334 *) Experimental support for use of HMAC via EVP_PKEY interface. This
2335 allows HMAC to be handled via the EVP_DigestSign*() interface. The
2336 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
2337 ENGINE support for HMAC keys which are unextractable. New -mac and
2338 -macopt options to dgst utility.
2341 *) New option -sigopt to dgst utility. Update dgst to use
2342 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
2343 alternative signing paramaters such as X9.31 or PSS in the dgst
2347 *) Change ssl_cipher_apply_rule(), the internal function that does
2348 the work each time a ciphersuite string requests enabling
2349 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
2350 removing ("!foo+bar") a class of ciphersuites: Now it maintains
2351 the order of disabled ciphersuites such that those ciphersuites
2352 that most recently went from enabled to disabled not only stay
2353 in order with respect to each other, but also have higher priority
2354 than other disabled ciphersuites the next time ciphersuites are
2357 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
2358 the same ciphersuites as with "HIGH" alone, but in a specific
2359 order where the PSK ciphersuites come first (since they are the
2360 most recently disabled ciphersuites when "HIGH" is parsed).
2362 Also, change ssl_create_cipher_list() (using this new
2363 funcionality) such that between otherwise identical
2364 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
2368 *) Change ssl_create_cipher_list() so that it automatically
2369 arranges the ciphersuites in reasonable order before starting
2370 to process the rule string. Thus, the definition for "DEFAULT"
2371 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
2372 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
2373 This makes it much easier to arrive at a reasonable default order
2374 in applications for which anonymous ciphers are OK (meaning
2375 that you can't actually use DEFAULT).
2376 [Bodo Moeller; suggested by Victor Duchovni]
2378 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
2379 processing) into multiple integers instead of setting
2380 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
2381 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
2382 (These masks as well as the individual bit definitions are hidden
2383 away into the non-exported interface ssl/ssl_locl.h, so this
2384 change to the definition of the SSL_CIPHER structure shouldn't
2385 affect applications.) This give us more bits for each of these
2386 categories, so there is no longer a need to coagulate AES128 and
2387 AES256 into a single algorithm bit, and to coagulate Camellia128
2388 and Camellia256 into a single algorithm bit, which has led to all
2391 Thus, among other things, the kludge introduced in 0.9.7m and
2392 0.9.8e for masking out AES256 independently of AES128 or masking
2393 out Camellia256 independently of AES256 is not needed here in 0.9.9.
2395 With the change, we also introduce new ciphersuite aliases that
2396 so far were missing: "AES128", "AES256", "CAMELLIA128", and
2400 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
2401 Use the leftmost N bytes of the signature input if the input is
2402 larger than the prime q (with N being the size in bytes of q).
2405 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
2406 it yet and it is largely untested.
2409 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
2412 *) Initial incomplete changes to avoid need for function casts in OpenSSL
2413 some compilers (gcc 4.2 and later) reject their use. Safestack is
2414 reimplemented. Update ASN1 to avoid use of legacy functions.
2417 *) Win32/64 targets are linked with Winsock2.
2420 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
2421 to external functions. This can be used to increase CRL handling
2422 efficiency especially when CRLs are very large by (for example) storing
2423 the CRL revoked certificates in a database.
2426 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
2427 new CRLs added to a directory can be used. New command line option
2428 -verify_return_error to s_client and s_server. This causes real errors
2429 to be returned by the verify callback instead of carrying on no matter
2430 what. This reflects the way a "real world" verify callback would behave.
2433 *) GOST engine, supporting several GOST algorithms and public key formats.
2434 Kindly donated by Cryptocom.
2437 *) Partial support for Issuing Distribution Point CRL extension. CRLs
2438 partitioned by DP are handled but no indirect CRL or reason partitioning
2439 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
2440 selected via a scoring technique which handles IDP and AKID in CRLs.
2443 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
2444 will ultimately be used for all verify operations: this will remove the
2445 X509_STORE dependency on certificate verification and allow alternative
2446 lookup methods. X509_STORE based implementations of these two callbacks.
2449 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
2450 Modify get_crl() to find a valid (unexpired) CRL if possible.
2453 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
2454 this would be called X509_CRL_cmp() but that name is already used by
2455 a function that just compares CRL issuer names. Cache several CRL
2456 extensions in X509_CRL structure and cache CRLDP in X509.
2459 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
2460 this maps equivalent X509_NAME structures into a consistent structure.
2461 Name comparison can then be performed rapidly using memcmp().
2464 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
2468 *) Allow digests to supply their own micalg string for S/MIME type using
2469 the ctrl EVP_MD_CTRL_MICALG.
2472 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
2473 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
2474 ctrl. It can then customise the structure before and/or after signing
2478 *) New function OBJ_add_sigid() to allow application defined signature OIDs
2479 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
2480 to free up any added signature OIDs.
2483 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
2484 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
2485 digest and cipher tables. New options added to openssl utility:
2486 list-message-digest-algorithms and list-cipher-algorithms.
2489 *) Change the array representation of binary polynomials: the list
2490 of degrees of non-zero coefficients is now terminated with -1.
2491 Previously it was terminated with 0, which was also part of the
2492 value; thus, the array representation was not applicable to
2493 polynomials where t^0 has coefficient zero. This change makes
2494 the array representation useful in a more general context.
2497 *) Various modifications and fixes to SSL/TLS cipher string
2498 handling. For ECC, the code now distinguishes between fixed ECDH
2499 with RSA certificates on the one hand and with ECDSA certificates
2500 on the other hand, since these are separate ciphersuites. The
2501 unused code for Fortezza ciphersuites has been removed.
2503 For consistency with EDH, ephemeral ECDH is now called "EECDH"
2504 (not "ECDHE"). For consistency with the code for DH
2505 certificates, use of ECDH certificates is now considered ECDH
2506 authentication, not RSA or ECDSA authentication (the latter is
2507 merely the CA's signing algorithm and not actively used in the
2510 The temporary ciphersuite alias "ECCdraft" is no longer
2511 available, and ECC ciphersuites are no longer excluded from "ALL"
2512 and "DEFAULT". The following aliases now exist for RFC 4492
2513 ciphersuites, most of these by analogy with the DH case:
2515 kECDHr - ECDH cert, signed with RSA
2516 kECDHe - ECDH cert, signed with ECDSA
2517 kECDH - ECDH cert (signed with either RSA or ECDSA)
2518 kEECDH - ephemeral ECDH
2519 ECDH - ECDH cert or ephemeral ECDH
2525 AECDH - anonymous ECDH
2526 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
2530 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
2531 Use correct micalg parameters depending on digest(s) in signed message.
2534 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
2535 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
2538 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
2539 an engine to register a method. Add ENGINE lookups for methods and
2540 functional reference processing.
2543 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
2544 EVP_{Sign,Verify}* which allow an application to customise the signature
2548 *) New -resign option to smime utility. This adds one or more signers
2549 to an existing PKCS#7 signedData structure. Also -md option to use an
2550 alternative message digest algorithm for signing.
2553 *) Tidy up PKCS#7 routines and add new functions to make it easier to
2554 create PKCS7 structures containing multiple signers. Update smime
2555 application to support multiple signers.
2558 *) New -macalg option to pkcs12 utility to allow setting of an alternative
2562 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
2563 Reorganize PBE internals to lookup from a static table using NIDs,
2564 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
2565 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
2566 PRF which will be automatically used with PBES2.
2569 *) Replace the algorithm specific calls to generate keys in "req" with the
2573 *) Update PKCS#7 enveloped data routines to use new API. This is now
2574 supported by any public key method supporting the encrypt operation. A
2575 ctrl is added to allow the public key algorithm to examine or modify
2576 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
2580 *) Add a ctrl to asn1 method to allow a public key algorithm to express
2581 a default digest type to use. In most cases this will be SHA1 but some
2582 algorithms (such as GOST) need to specify an alternative digest. The
2583 return value indicates how strong the preference is 1 means optional and
2584 2 is mandatory (that is it is the only supported type). Modify
2585 ASN1_item_sign() to accept a NULL digest argument to indicate it should
2586 use the default md. Update openssl utilities to use the default digest
2587 type for signing if it is not explicitly indicated.
2590 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
2591 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
2592 signing method from the key type. This effectively removes the link
2593 between digests and public key types.
2596 *) Add an OID cross reference table and utility functions. Its purpose is to
2597 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
2598 rsaEncryption. This will allow some of the algorithm specific hackery
2599 needed to use the correct OID to be removed.
2602 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
2603 structures for PKCS7_sign(). They are now set up by the relevant public
2607 *) Add provisional EC pkey method with support for ECDSA and ECDH.
2610 *) Add support for key derivation (agreement) in the API, DH method and
2614 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
2615 public and private key formats. As a side effect these add additional
2616 command line functionality not previously available: DSA signatures can be
2617 generated and verified using pkeyutl and DH key support and generation in
2622 [Oliver Tappe <zooey@hirschkaefer.de>]
2624 *) New make target "install_html_docs" installs HTML renditions of the
2626 [Oliver Tappe <zooey@hirschkaefer.de>]
2628 *) New utility "genpkey" this is analogous to "genrsa" etc except it can
2629 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
2630 support key and parameter generation and add initial key generation
2631 functionality for RSA.
2634 *) Add functions for main EVP_PKEY_method operations. The undocumented
2635 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
2636 EVP_PKEY_{encrypt,decrypt}_old.
2639 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
2640 key API, doesn't do much yet.
2643 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
2644 public key algorithms. New option to openssl utility:
2645 "list-public-key-algorithms" to print out info.
2648 *) Implement the Supported Elliptic Curves Extension for
2649 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2652 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
2653 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
2656 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
2657 utilities such as rsa, dsa, dsaparam etc except they process any key
2661 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
2662 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
2663 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
2667 *) Initial support for pluggable public key ASN1.
2668 De-spaghettify the public key ASN1 handling. Move public and private
2669 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
2670 algorithm specific handling to a single module within the relevant
2671 algorithm directory. Add functions to allow (near) opaque processing
2672 of public and private key structures.
2675 *) Implement the Supported Point Formats Extension for
2676 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2679 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
2680 for the psk identity [hint] and the psk callback functions to the
2681 SSL_SESSION, SSL and SSL_CTX structure.
2684 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
2688 SSL_CTX_use_psk_identity_hint
2689 SSL_get_psk_identity_hint
2690 SSL_get_psk_identity
2691 SSL_use_psk_identity_hint
2693 [Mika Kousa and Pasi Eronen of Nokia Corporation]
2695 *) Add RFC 3161 compliant time stamp request creation, response generation
2696 and response verification functionality.
2697 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
2699 *) Add initial support for TLS extensions, specifically for the server_name
2700 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2701 have new members for a host name. The SSL data structure has an
2702 additional member SSL_CTX *initial_ctx so that new sessions can be
2703 stored in that context to allow for session resumption, even after the
2704 SSL has been switched to a new SSL_CTX in reaction to a client's
2705 server_name extension.
2707 New functions (subject to change):
2709 SSL_get_servername()
2710 SSL_get_servername_type()
2713 New CTRL codes and macros (subject to change):
2715 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2716 - SSL_CTX_set_tlsext_servername_callback()
2717 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2718 - SSL_CTX_set_tlsext_servername_arg()
2719 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2721 openssl s_client has a new '-servername ...' option.
2723 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2724 '-key2 ...', '-servername_fatal' (subject to change). This allows
2725 testing the HostName extension for a specific single host name ('-cert'
2726 and '-key' remain fallbacks for handshakes without HostName
2727 negotiation). If the unrecognized_name alert has to be sent, this by
2728 default is a warning; it becomes fatal with the '-servername_fatal'
2731 [Peter Sylvester, Remy Allais, Christophe Renou]
2733 *) Whirlpool hash implementation is added.
2736 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
2737 bn(64,32). Because of instruction set limitations it doesn't have
2738 any negative impact on performance. This was done mostly in order
2739 to make it possible to share assembler modules, such as bn_mul_mont
2740 implementations, between 32- and 64-bit builds without hassle.
2743 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
2744 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
2748 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
2749 dedicated Montgomery multiplication procedure, is introduced.
2750 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
2751 "64-bit" performance on certain 32-bit targets.
2754 *) New option SSL_OP_NO_COMP to disable use of compression selectively
2755 in SSL structures. New SSL ctrl to set maximum send fragment size.
2756 Save memory by seeting the I/O buffer sizes dynamically instead of
2757 using the maximum available value.
2760 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
2761 in addition to the text details.
2764 *) Very, very preliminary EXPERIMENTAL support for printing of general
2765 ASN1 structures. This currently produces rather ugly output and doesn't
2766 handle several customised structures at all.
2769 *) Integrated support for PVK file format and some related formats such
2770 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
2771 these in the 'rsa' and 'dsa' utilities.
2774 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
2777 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
2778 place for the (very old) "NETSCAPE" format certificates which are now
2779 handled using new ASN1 code equivalents.
2782 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
2783 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
2784 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
2787 *) Modify CRL distribution points extension code to print out previously
2788 unsupported fields. Enhance extension setting code to allow setting of
2792 *) Add print and set support for Issuing Distribution Point CRL extension.
2795 *) Change 'Configure' script to enable Camellia by default.
2798 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
2800 *) When rejecting SSL/TLS records due to an incorrect version number, never
2801 update s->server with a new major version number. As of
2802 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
2803 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
2804 the previous behavior could result in a read attempt at NULL when
2805 receiving specific incorrect SSL/TLS records once record payload
2806 protection is active. (CVE-2010-0740)
2807 [Bodo Moeller, Adam Langley <agl@chromium.org>]
2809 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
2810 could be crashed if the relevant tables were not present (e.g. chrooted).
2811 [Tomas Hoger <thoger@redhat.com>]
2813 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
2815 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
2816 [Martin Olsson, Neel Mehta]
2818 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
2819 accommodate for stack sorting, always a write lock!).
2822 *) On some versions of WIN32 Heap32Next is very slow. This can cause
2823 excessive delays in the RAND_poll(): over a minute. As a workaround
2824 include a time check in the inner Heap32Next loop too.
2827 *) The code that handled flushing of data in SSL/TLS originally used the
2828 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
2829 the problem outlined in PR#1949. The fix suggested there however can
2830 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
2831 of Apache). So instead simplify the code to flush unconditionally.
2832 This should be fine since flushing with no data to flush is a no op.
2835 *) Handle TLS versions 2.0 and later properly and correctly use the
2836 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
2837 off ancient servers have a habit of sticking around for a while...
2840 *) Modify compression code so it frees up structures without using the
2841 ex_data callbacks. This works around a problem where some applications
2842 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
2843 restarting) then use compression (e.g. SSL with compression) later.
2844 This results in significant per-connection memory leaks and
2845 has caused some security issues including CVE-2008-1678 and
2849 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
2850 change when encrypting or decrypting.
2853 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
2854 connect and renegotiate with servers which do not support RI.
2855 Until RI is more widely deployed this option is enabled by default.
2858 *) Add "missing" ssl ctrls to clear options and mode.
2861 *) If client attempts to renegotiate and doesn't support RI respond with
2862 a no_renegotiation alert as required by RFC5746. Some renegotiating
2863 TLS clients will continue a connection gracefully when they receive
2864 the alert. Unfortunately OpenSSL mishandled this alert and would hang
2865 waiting for a server hello which it will never receive. Now we treat a
2866 received no_renegotiation alert as a fatal error. This is because
2867 applications requesting a renegotiation might well expect it to succeed
2868 and would have no code in place to handle the server denying it so the
2869 only safe thing to do is to terminate the connection.
2872 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
2873 peer supports secure renegotiation and 0 otherwise. Print out peer
2874 renegotiation support in s_client/s_server.
2877 *) Replace the highly broken and deprecated SPKAC certification method with
2878 the updated NID creation version. This should correctly handle UTF8.
2881 *) Implement RFC5746. Re-enable renegotiation but require the extension
2882 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
2883 turns out to be a bad idea. It has been replaced by
2884 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
2885 SSL_CTX_set_options(). This is really not recommended unless you
2886 know what you are doing.
2887 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
2889 *) Fixes to stateless session resumption handling. Use initial_ctx when
2890 issuing and attempting to decrypt tickets in case it has changed during
2891 servername handling. Use a non-zero length session ID when attempting
2892 stateless session resumption: this makes it possible to determine if
2893 a resumption has occurred immediately after receiving server hello
2894 (several places in OpenSSL subtly assume this) instead of later in
2898 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
2899 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
2900 fixes for a few places where the return code is not checked
2902 [Julia Lawall <julia@diku.dk>]
2904 *) Add --strict-warnings option to Configure script to include devteam
2905 warnings in other configurations.
2908 *) Add support for --libdir option and LIBDIR variable in makefiles. This
2909 makes it possible to install openssl libraries in locations which
2910 have names other than "lib", for example "/usr/lib64" which some
2912 [Steve Henson, based on patch from Jeremy Utley]
2914 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
2915 X690 8.9.12 and can produce some misleading textual output of OIDs.
2916 [Steve Henson, reported by Dan Kaminsky]
2918 *) Delete MD2 from algorithm tables. This follows the recommendation in
2919 several standards that it is not used in new applications due to
2920 several cryptographic weaknesses. For binary compatibility reasons
2921 the MD2 API is still compiled in by default.
2924 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
2928 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
2929 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
2931 [Guenter <lists@gknw.net>]
2933 *) Fix the server certificate chain building code to use X509_verify_cert(),
2934 it used to have an ad-hoc builder which was unable to cope with anything
2935 other than a simple chain.
2936 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
2938 *) Don't check self signed certificate signatures in X509_verify_cert()
2939 by default (a flag can override this): it just wastes time without
2940 adding any security. As a useful side effect self signed root CAs
2941 with non-FIPS digests are now usable in FIPS mode.
2944 *) In dtls1_process_out_of_seq_message() the check if the current message
2945 is already buffered was missing. For every new message was memory
2946 allocated, allowing an attacker to perform an denial of service attack
2947 with sending out of seq handshake messages until there is no memory
2948 left. Additionally every future messege was buffered, even if the
2949 sequence number made no sense and would be part of another handshake.
2950 So only messages with sequence numbers less than 10 in advance will be
2951 buffered. (CVE-2009-1378)
2952 [Robin Seggelmann, discovered by Daniel Mentz]
2954 *) Records are buffered if they arrive with a future epoch to be
2955 processed after finishing the corresponding handshake. There is
2956 currently no limitation to this buffer allowing an attacker to perform
2957 a DOS attack with sending records with future epochs until there is no
2958 memory left. This patch adds the pqueue_size() function to determine
2959 the size of a buffer and limits the record buffer to 100 entries.
2961 [Robin Seggelmann, discovered by Daniel Mentz]
2963 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
2964 parent structure is freed. (CVE-2009-1379)
2967 *) Handle non-blocking I/O properly in SSL_shutdown() call.
2968 [Darryl Miles <darryl-mailinglists@netbauds.net>]
2971 [Ilya O. <vrghost@gmail.com>]
2973 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
2975 *) Disable renegotiation completely - this fixes a severe security
2976 problem (CVE-2009-3555) at the cost of breaking all
2977 renegotiation. Renegotiation can be re-enabled by setting
2978 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
2979 run-time. This is really not recommended unless you know what
2983 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
2985 *) Don't set val to NULL when freeing up structures, it is freed up by
2986 underlying code. If sizeof(void *) > sizeof(long) this can result in
2987 zeroing past the valid field. (CVE-2009-0789)
2988 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
2990 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
2991 checked correctly. This would allow some invalid signed attributes to
2992 appear to verify correctly. (CVE-2009-0591)
2993 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2995 *) Reject UniversalString and BMPString types with invalid lengths. This
2996 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
2997 a legal length. (CVE-2009-0590)
3000 *) Set S/MIME signing as the default purpose rather than setting it
3001 unconditionally. This allows applications to override it at the store
3005 *) Permit restricted recursion of ASN1 strings. This is needed in practice
3006 to handle some structures.
3009 *) Improve efficiency of mem_gets: don't search whole buffer each time
3011 [Jeremy Shapiro <jnshapir@us.ibm.com>]
3013 *) New -hex option for openssl rand.
3016 *) Print out UTF8String and NumericString when parsing ASN1.
3019 *) Support NumericString type for name components.
3022 *) Allow CC in the environment to override the automatically chosen
3023 compiler. Note that nothing is done to ensure flags work with the
3027 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
3029 *) Properly check EVP_VerifyFinal() and similar return values
3031 [Ben Laurie, Bodo Moeller, Google Security Team]
3033 *) Enable TLS extensions by default.
3036 *) Allow the CHIL engine to be loaded, whether the application is
3037 multithreaded or not. (This does not release the developer from the
3038 obligation to set up the dynamic locking callbacks.)
3039 [Sander Temme <sander@temme.net>]
3041 *) Use correct exit code if there is an error in dgst command.
3042 [Steve Henson; problem pointed out by Roland Dirlewanger]
3044 *) Tweak Configure so that you need to say "experimental-jpake" to enable
3045 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
3048 *) Add experimental JPAKE support, including demo authentication in
3049 s_client and s_server.
3052 *) Set the comparison function in v3_addr_canonize().
3053 [Rob Austein <sra@hactrn.net>]
3055 *) Add support for XMPP STARTTLS in s_client.
3056 [Philip Paeps <philip@freebsd.org>]
3058 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
3059 to ensure that even with this option, only ciphersuites in the
3060 server's preference list will be accepted. (Note that the option
3061 applies only when resuming a session, so the earlier behavior was
3062 just about the algorithm choice for symmetric cryptography.)
3065 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
3067 *) Fix NULL pointer dereference if a DTLS server received
3068 ChangeCipherSpec as first record (CVE-2009-1386).
3071 *) Fix a state transition in s3_srvr.c and d1_srvr.c
3072 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
3075 *) The fix in 0.9.8c that supposedly got rid of unsafe
3076 double-checked locking was incomplete for RSA blinding,
3077 addressing just one layer of what turns out to have been
3078 doubly unsafe triple-checked locking.
3080 So now fix this for real by retiring the MONT_HELPER macro
3081 in crypto/rsa/rsa_eay.c.
3083 [Bodo Moeller; problem pointed out by Marius Schilder]
3085 *) Various precautionary measures:
3087 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
3089 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
3090 (NB: This would require knowledge of the secret session ticket key
3091 to exploit, in which case you'd be SOL either way.)
3093 - Change bn_nist.c so that it will properly handle input BIGNUMs
3094 outside the expected range.
3096 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
3099 [Neel Mehta, Bodo Moeller]
3101 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
3102 the load fails. Useful for distros.
3103 [Ben Laurie and the FreeBSD team]
3105 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
3108 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
3111 *) Expand ENGINE to support engine supplied SSL client certificate functions.
3113 This work was sponsored by Logica.
3116 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
3117 keystores. Support for SSL/TLS client authentication too.
3118 Not compiled unless enable-capieng specified to Configure.
3120 This work was sponsored by Logica.
3123 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
3124 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
3125 attribute creation routines such as certifcate requests and PKCS#12
3129 Changes between 0.9.8g and 0.9.8h [28 May 2008]
3131 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
3132 handshake which could lead to a cilent crash as found using the
3133 Codenomicon TLS test suite (CVE-2008-1672)
3134 [Steve Henson, Mark Cox]
3136 *) Fix double free in TLS server name extensions which could lead to
3137 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
3140 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
3142 Clear the error queue to ensure that error entries left from
3143 older function calls do not interfere with the correct operation.
3144 [Lutz Jaenicke, Erik de Castro Lopo]
3146 *) Remove root CA certificates of commercial CAs:
3148 The OpenSSL project does not recommend any specific CA and does not
3149 have any policy with respect to including or excluding any CA.
3150 Therefore it does not make any sense to ship an arbitrary selection
3151 of root CA certificates with the OpenSSL software.
3154 *) RSA OAEP patches to fix two separate invalid memory reads.
3155 The first one involves inputs when 'lzero' is greater than
3156 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
3157 before the beginning of from). The second one involves inputs where
3158 the 'db' section contains nothing but zeroes (there is a one-byte
3159 invalid read after the end of 'db').
3160 [Ivan Nestlerode <inestlerode@us.ibm.com>]
3162 *) Partial backport from 0.9.9-dev:
3164 Introduce bn_mul_mont (dedicated Montgomery multiplication
3165 procedure) as a candidate for BIGNUM assembler implementation.
3166 While 0.9.9-dev uses assembler for various architectures, only
3167 x86_64 is available by default here in the 0.9.8 branch, and
3168 32-bit x86 is available through a compile-time setting.
3170 To try the 32-bit x86 assembler implementation, use Configure
3171 option "enable-montasm" (which exists only for this backport).
3173 As "enable-montasm" for 32-bit x86 disclaims code stability
3174 anyway, in this constellation we activate additional code
3175 backported from 0.9.9-dev for further performance improvements,
3176 namely BN_from_montgomery_word. (To enable this otherwise,
3177 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
3179 [Andy Polyakov (backport partially by Bodo Moeller)]
3181 *) Add TLS session ticket callback. This allows an application to set
3182 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
3183 values. This is useful for key rollover for example where several key
3184 sets may exist with different names.
3187 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
3188 This was broken until now in 0.9.8 releases, such that the only way
3189 a registered ENGINE could be used (assuming it initialises
3190 successfully on the host) was to explicitly set it as the default
3191 for the relevant algorithms. This is in contradiction with 0.9.7
3192 behaviour and the documentation. With this fix, when an ENGINE is
3193 registered into a given algorithm's table of implementations, the
3194 'uptodate' flag is reset so that auto-discovery will be used next
3195 time a new context for that algorithm attempts to select an
3197 [Ian Lister (tweaked by Geoff Thorpe)]
3199 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
3200 implemention in the following ways:
3202 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
3205 Lack of BER streaming support means one pass streaming processing is
3206 only supported if data is detached: setting the streaming flag is
3207 ignored for embedded content.
3209 CMS support is disabled by default and must be explicitly enabled
3210 with the enable-cms configuration option.
3213 *) Update the GMP engine glue to do direct copies between BIGNUM and
3214 mpz_t when openssl and GMP use the same limb size. Otherwise the
3215 existing "conversion via a text string export" trick is still used.
3216 [Paul Sheer <paulsheer@gmail.com>]
3218 *) Zlib compression BIO. This is a filter BIO which compressed and
3219 uncompresses any data passed through it.
3222 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
3223 RFC3394 compatible AES key wrapping.
3226 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
3227 sets string data without copying. X509_ALGOR_set0() and
3228 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
3229 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
3230 from an X509_ATTRIBUTE structure optionally checking it occurs only
3231 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
3235 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
3236 to get the expected BN_FLG_CONSTTIME behavior.
3237 [Bodo Moeller (Google)]
3241 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
3242 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
3243 - added some more tests to do_tests.pl
3244 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
3245 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
3246 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
3247 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
3248 - various changes to netware.pl to enable gcc-cross builds on Win32
3250 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
3251 - various changes to fix missing prototype warnings
3252 - fixed x86nasm.pl to create correct asm files for NASM COFF output
3253 - added AES, WHIRLPOOL and CPUID assembler code to build files
3254 - added missing AES assembler make rules to mk1mf.pl
3255 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
3256 [Guenter Knauf <eflash@gmx.net>]
3258 *) Implement certificate status request TLS extension defined in RFC3546.
3259 A client can set the appropriate parameters and receive the encoded
3260 OCSP response via a callback. A server can query the supplied parameters
3261 and set the encoded OCSP response in the callback. Add simplified examples
3262 to s_client and s_server.
3265 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
3267 *) Fix various bugs:
3268 + Binary incompatibility of ssl_ctx_st structure
3269 + DTLS interoperation with non-compliant servers
3270 + Don't call get_session_cb() without proposed session
3271 + Fix ia64 assembler code
3272 [Andy Polyakov, Steve Henson]
3274 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
3276 *) DTLS Handshake overhaul. There were longstanding issues with
3277 OpenSSL DTLS implementation, which were making it impossible for
3278 RFC 4347 compliant client to communicate with OpenSSL server.
3279 Unfortunately just fixing these incompatibilities would "cut off"
3280 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
3281 server keeps tolerating non RFC compliant syntax. The opposite is
3282 not true, 0.9.8f client can not communicate with earlier server.
3283 This update even addresses CVE-2007-4995.
3286 *) Changes to avoid need for function casts in OpenSSL: some compilers
3287 (gcc 4.2 and later) reject their use.
3288 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
3291 *) Add RFC4507 support to OpenSSL. This includes the corrections in
3292 RFC4507bis. The encrypted ticket format is an encrypted encoded
3293 SSL_SESSION structure, that way new session features are automatically
3296 If a client application caches session in an SSL_SESSION structure
3297 support is transparent because tickets are now stored in the encoded
3300 The SSL_CTX structure automatically generates keys for ticket
3301 protection in servers so again support should be possible
3302 with no application modification.
3304 If a client or server wishes to disable RFC4507 support then the option
3305 SSL_OP_NO_TICKET can be set.
3307 Add a TLS extension debugging callback to allow the contents of any client
3308 or server extensions to be examined.
3310 This work was sponsored by Google.
3313 *) Add initial support for TLS extensions, specifically for the server_name
3314 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
3315 have new members for a host name. The SSL data structure has an
3316 additional member SSL_CTX *initial_ctx so that new sessions can be
3317 stored in that context to allow for session resumption, even after the
3318 SSL has been switched to a new SSL_CTX in reaction to a client's
3319 server_name extension.
3321 New functions (subject to change):
3323 SSL_get_servername()
3324 SSL_get_servername_type()
3327 New CTRL codes and macros (subject to change):
3329 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
3330 - SSL_CTX_set_tlsext_servername_callback()
3331 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
3332 - SSL_CTX_set_tlsext_servername_arg()
3333 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
3335 openssl s_client has a new '-servername ...' option.
3337 openssl s_server has new options '-servername_host ...', '-cert2 ...',
3338 '-key2 ...', '-servername_fatal' (subject to change). This allows
3339 testing the HostName extension for a specific single host name ('-cert'
3340 and '-key' remain fallbacks for handshakes without HostName
3341 negotiation). If the unrecognized_name alert has to be sent, this by
3342 default is a warning; it becomes fatal with the '-servername_fatal'
3345 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
3347 *) Add AES and SSE2 assembly language support to VC++ build.
3350 *) Mitigate attack on final subtraction in Montgomery reduction.
3353 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
3354 (which previously caused an internal error).
3357 *) Squeeze another 10% out of IGE mode when in != out.
3360 *) AES IGE mode speedup.
3361 [Dean Gaudet (Google)]
3363 *) Add the Korean symmetric 128-bit cipher SEED (see
3364 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
3365 add SEED ciphersuites from RFC 4162:
3367 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
3368 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
3369 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
3370 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
3372 To minimize changes between patchlevels in the OpenSSL 0.9.8
3373 series, SEED remains excluded from compilation unless OpenSSL
3374 is configured with 'enable-seed'.
3375 [KISA, Bodo Moeller]
3377 *) Mitigate branch prediction attacks, which can be practical if a
3378 single processor is shared, allowing a spy process to extract
3379 information. For detailed background information, see
3380 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
3381 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
3382 and Necessary Software Countermeasures"). The core of the change
3383 are new versions BN_div_no_branch() and
3384 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
3385 respectively, which are slower, but avoid the security-relevant
3386 conditional branches. These are automatically called by BN_div()
3387 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
3388 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
3389 remove a conditional branch.
3391 BN_FLG_CONSTTIME is the new name for the previous
3392 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
3393 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
3394 in the exponent causes BN_mod_exp_mont() to use the alternative
3395 implementation in BN_mod_exp_mont_consttime().) The old name
3396 remains as a deprecated alias.
3398 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
3399 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
3400 constant-time implementations for more than just exponentiation.
3401 Here too the old name is kept as a deprecated alias.
3403 BN_BLINDING_new() will now use BN_dup() for the modulus so that
3404 the BN_BLINDING structure gets an independent copy of the
3405 modulus. This means that the previous "BIGNUM *m" argument to
3406 BN_BLINDING_new() and to BN_BLINDING_create_param() now
3407 essentially becomes "const BIGNUM *m", although we can't actually
3408 change this in the header file before 0.9.9. It allows
3409 RSA_setup_blinding() to use BN_with_flags() on the modulus to
3410 enable BN_FLG_CONSTTIME.
3412 [Matthew D Wood (Intel Corp)]
3414 *) In the SSL/TLS server implementation, be strict about session ID
3415 context matching (which matters if an application uses a single
3416 external cache for different purposes). Previously,
3417 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
3418 set. This did ensure strict client verification, but meant that,
3419 with applications using a single external cache for quite
3420 different requirements, clients could circumvent ciphersuite
3421 restrictions for a given session ID context by starting a session
3422 in a different context.
3425 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3426 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3427 authentication-only ciphersuites.
3430 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
3431 not complete and could lead to a possible single byte overflow
3432 (CVE-2007-5135) [Ben Laurie]
3434 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
3436 *) Since AES128 and AES256 (and similarly Camellia128 and
3437 Camellia256) share a single mask bit in the logic of
3438 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3439 kludge to work properly if AES128 is available and AES256 isn't
3440 (or if Camellia128 is available and Camellia256 isn't).
3443 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
3444 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
3445 When a point or a seed is encoded in a BIT STRING, we need to
3446 prevent the removal of trailing zero bits to get the proper DER
3447 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
3448 of a NamedBitList, for which trailing 0 bits need to be removed.)
3451 *) Have SSL/TLS server implementation tolerate "mismatched" record
3452 protocol version while receiving ClientHello even if the
3453 ClientHello is fragmented. (The server can't insist on the
3454 particular protocol version it has chosen before the ServerHello
3455 message has informed the client about his choice.)
3458 *) Add RFC 3779 support.
3459 [Rob Austein for ARIN, Ben Laurie]
3461 *) Load error codes if they are not already present instead of using a
3462 static variable. This allows them to be cleanly unloaded and reloaded.
3463 Improve header file function name parsing.
3466 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
3467 or CAPABILITY handshake as required by RFCs.
3470 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
3472 *) Introduce limits to prevent malicious keys being able to
3473 cause a denial of service. (CVE-2006-2940)
3474 [Steve Henson, Bodo Moeller]
3476 *) Fix ASN.1 parsing of certain invalid structures that can result
3477 in a denial of service. (CVE-2006-2937) [Steve Henson]
3479 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3480 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3482 *) Fix SSL client code which could crash if connecting to a
3483 malicious SSLv2 server. (CVE-2006-4343)
3484 [Tavis Ormandy and Will Drewry, Google Security Team]
3486 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
3487 match only those. Before that, "AES256-SHA" would be interpreted
3488 as a pattern and match "AES128-SHA" too (since AES128-SHA got
3489 the same strength classification in 0.9.7h) as we currently only
3490 have a single AES bit in the ciphersuite description bitmap.
3491 That change, however, also applied to ciphersuite strings such as
3492 "RC4-MD5" that intentionally matched multiple ciphersuites --
3493 namely, SSL 2.0 ciphersuites in addition to the more common ones
3494 from SSL 3.0/TLS 1.0.
3496 So we change the selection algorithm again: Naming an explicit
3497 ciphersuite selects this one ciphersuite, and any other similar
3498 ciphersuite (same bitmap) from *other* protocol versions.
3499 Thus, "RC4-MD5" again will properly select both the SSL 2.0
3500 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
3502 Since SSL 2.0 does not have any ciphersuites for which the
3503 128/256 bit distinction would be relevant, this works for now.
3504 The proper fix will be to use different bits for AES128 and
3505 AES256, which would have avoided the problems from the beginning;
3506 however, bits are scarce, so we can only do this in a new release
3507 (not just a patchlevel) when we can change the SSL_CIPHER
3508 definition to split the single 'unsigned long mask' bitmap into
3509 multiple values to extend the available space.
3513 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
3515 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3516 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3518 *) Add AES IGE and biIGE modes.
3521 *) Change the Unix randomness entropy gathering to use poll() when
3522 possible instead of select(), since the latter has some
3523 undesirable limitations.
3524 [Darryl Miles via Richard Levitte and Bodo Moeller]
3526 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
3527 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
3528 cannot be implicitly activated as part of, e.g., the "AES" alias.
3529 However, please upgrade to OpenSSL 0.9.9[-dev] for
3530 non-experimental use of the ECC ciphersuites to get TLS extension
3531 support, which is required for curve and point format negotiation
3532 to avoid potential handshake problems.
3535 *) Disable rogue ciphersuites:
3537 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3538 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3539 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3541 The latter two were purportedly from
3542 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3545 Also deactivate the remaining ciphersuites from
3546 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3547 unofficial, and the ID has long expired.
3550 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3551 dual-core machines) and other potential thread-safety issues.
3554 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
3555 versions), which is now available for royalty-free use
3556 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
3557 Also, add Camellia TLS ciphersuites from RFC 4132.
3559 To minimize changes between patchlevels in the OpenSSL 0.9.8
3560 series, Camellia remains excluded from compilation unless OpenSSL
3561 is configured with 'enable-camellia'.
3564 *) Disable the padding bug check when compression is in use. The padding
3565 bug check assumes the first packet is of even length, this is not
3566 necessarily true if compresssion is enabled and can result in false
3567 positives causing handshake failure. The actual bug test is ancient
3568 code so it is hoped that implementations will either have fixed it by
3569 now or any which still have the bug do not support compression.
3572 Changes between 0.9.8a and 0.9.8b [04 May 2006]
3574 *) When applying a cipher rule check to see if string match is an explicit
3575 cipher suite and only match that one cipher suite if it is.
3578 *) Link in manifests for VC++ if needed.
3579 [Austin Ziegler <halostatue@gmail.com>]
3581 *) Update support for ECC-based TLS ciphersuites according to
3582 draft-ietf-tls-ecc-12.txt with proposed changes (but without
3583 TLS extensions, which are supported starting with the 0.9.9
3584 branch, not in the OpenSSL 0.9.8 branch).
3587 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
3588 opaque EVP_CIPHER_CTX handling.
3591 *) Fixes and enhancements to zlib compression code. We now only use
3592 "zlib1.dll" and use the default __cdecl calling convention on Win32
3593 to conform with the standards mentioned here:
3594 http://www.zlib.net/DLL_FAQ.txt
3595 Static zlib linking now works on Windows and the new --with-zlib-include
3596 --with-zlib-lib options to Configure can be used to supply the location
3597 of the headers and library. Gracefully handle case where zlib library
3601 *) Several fixes and enhancements to the OID generation code. The old code
3602 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
3603 handle numbers larger than ULONG_MAX, truncated printing and had a
3604 non standard OBJ_obj2txt() behaviour.
3607 *) Add support for building of engines under engine/ as shared libraries
3608 under VC++ build system.
3611 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
3612 Hopefully, we will not see any false combination of paths any more.
3615 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
3617 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3618 (part of SSL_OP_ALL). This option used to disable the
3619 countermeasure against man-in-the-middle protocol-version
3620 rollback in the SSL 2.0 server implementation, which is a bad
3621 idea. (CVE-2005-2969)
3623 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3624 for Information Security, National Institute of Advanced Industrial
3625 Science and Technology [AIST], Japan)]
3627 *) Add two function to clear and return the verify parameter flags.
3630 *) Keep cipherlists sorted in the source instead of sorting them at
3631 runtime, thus removing the need for a lock.
3634 *) Avoid some small subgroup attacks in Diffie-Hellman.
3635 [Nick Mathewson and Ben Laurie]
3637 *) Add functions for well-known primes.
3640 *) Extended Windows CE support.
3641 [Satoshi Nakamura and Andy Polyakov]
3643 *) Initialize SSL_METHOD structures at compile time instead of during
3644 runtime, thus removing the need for a lock.
3647 *) Make PKCS7_decrypt() work even if no certificate is supplied by
3648 attempting to decrypt each encrypted key in turn. Add support to
3652 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
3654 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
3657 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
3660 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
3661 key into the same file any more.
3664 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
3667 *) Add -utf8 command line and config file option to 'ca'.
3668 [Stefan <stf@udoma.org]
3670 *) Removed the macro des_crypt(), as it seems to conflict with some
3671 libraries. Use DES_crypt().
3674 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
3675 involves renaming the source and generated shared-libs for
3676 both. The engines will accept the corrected or legacy ids
3677 ('ncipher' and '4758_cca' respectively) when binding. NB,
3678 this only applies when building 'shared'.
3679 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
3681 *) Add attribute functions to EVP_PKEY structure. Modify
3682 PKCS12_create() to recognize a CSP name attribute and
3683 use it. Make -CSP option work again in pkcs12 utility.
3686 *) Add new functionality to the bn blinding code:
3687 - automatic re-creation of the BN_BLINDING parameters after
3688 a fixed number of uses (currently 32)
3689 - add new function for parameter creation
3690 - introduce flags to control the update behaviour of the
3691 BN_BLINDING parameters
3692 - hide BN_BLINDING structure
3693 Add a second BN_BLINDING slot to the RSA structure to improve
3694 performance when a single RSA object is shared among several
3698 *) Add support for DTLS.
3699 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
3701 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
3702 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
3705 *) Remove buggy and incomplete DH cert support from
3706 ssl/ssl_rsa.c and ssl/s3_both.c
3709 *) Use SHA-1 instead of MD5 as the default digest algorithm for
3710 the apps/openssl applications.
3713 *) Compile clean with "-Wall -Wmissing-prototypes
3714 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
3715 DEBUG_SAFESTACK must also be set.
3718 *) Change ./Configure so that certain algorithms can be disabled by default.
3719 The new counterpiece to "no-xxx" is "enable-xxx".
3721 The patented RC5 and MDC2 algorithms will now be disabled unless
3722 "enable-rc5" and "enable-mdc2", respectively, are specified.
3724 (IDEA remains enabled despite being patented. This is because IDEA
3725 is frequently required for interoperability, and there is no license
3726 fee for non-commercial use. As before, "no-idea" can be used to
3727 avoid this algorithm.)
3731 *) Add processing of proxy certificates (see RFC 3820). This work was
3732 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
3733 EGEE (Enabling Grids for E-science in Europe).
3736 *) RC4 performance overhaul on modern architectures/implementations, such
3737 as Intel P4, IA-64 and AMD64.
projects / openssl.git / blob