5 Changes between 1.0.2 and 1.1.0 [xx XXX xxxx]
7 *) Experimental support for a new, fast, unbiased prime candidate generator,
8 bn_probable_prime_dh_coprime(). Not currently used by any prime generator.
9 [Felix Laurie von Massenbach <felix@erbridge.co.uk>]
11 *) New output format NSS in the sess_id command line tool. This allows
12 exporting the session id and the master key in NSS keylog format.
13 [Martin Kaiser <martin@kaiser.cx>]
15 *) Harmonize version and its documentation. -f flag is used to display
17 [mancha <mancha1@zoho.com>]
19 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
21 [mancha <mancha1@zoho.com>]
23 *) Fix some double frees. These are not thought to be exploitable.
24 [mancha <mancha1@zoho.com>]
26 *) A missing bounds check in the handling of the TLS heartbeat extension
27 can be used to reveal up to 64k of memory to a connected client or
30 Thanks for Neel Mehta of Google Security for discovering this bug and to
31 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
32 preparing the fix (CVE-2014-0160)
33 [Adam Langley, Bodo Moeller]
35 *) Fix for the attack described in the paper "Recovering OpenSSL
36 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
37 by Yuval Yarom and Naomi Benger. Details can be obtained from:
38 http://eprint.iacr.org/2014/140
40 Thanks to Yuval Yarom and Naomi Benger for discovering this
41 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
42 [Yuval Yarom and Naomi Benger]
44 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
45 this fixes a limitation in previous versions of OpenSSL.
48 *) Experimental encrypt-then-mac support.
50 Experimental support for encrypt then mac from
51 draft-gutmann-tls-encrypt-then-mac-02.txt
53 To enable it set the appropriate extension number (0x42 for the test
54 server) using e.g. -DTLSEXT_TYPE_encrypt_then_mac=0x42
56 For non-compliant peers (i.e. just about everything) this should have no
59 WARNING: EXPERIMENTAL, SUBJECT TO CHANGE.
63 *) Add EVP support for key wrapping algorithms, to avoid problems with
64 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
65 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
66 algorithms and include tests cases.
69 *) Extend CMS code to support RSA-PSS signatures and RSA-OAEP for
73 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
74 MGF1 digest and OAEP label.
77 *) Make openssl verify return errors.
78 [Chris Palmer <palmer@google.com> and Ben Laurie]
80 *) New function ASN1_TIME_diff to calculate the difference between two
81 ASN1_TIME structures or one structure and the current time.
84 *) Update fips_test_suite to support multiple command line options. New
85 test to induce all self test errors in sequence and check expected
89 *) Add FIPS_{rsa,dsa,ecdsa}_{sign,verify} functions which digest and
90 sign or verify all in one operation.
93 *) Add fips_algvs: a multicall fips utility incorporating all the algorithm
94 test programs and fips_test_suite. Includes functionality to parse
95 the minimal script output of fipsalgest.pl directly.
98 *) Add authorisation parameter to FIPS_module_mode_set().
101 *) Add FIPS selftest for ECDH algorithm using P-224 and B-233 curves.
104 *) Use separate DRBG fields for internal and external flags. New function
105 FIPS_drbg_health_check() to perform on demand health checking. Add
106 generation tests to fips_test_suite with reduced health check interval to
107 demonstrate periodic health checking. Add "nodh" option to
108 fips_test_suite to skip very slow DH test.
111 *) New function FIPS_get_cipherbynid() to lookup FIPS supported ciphers
115 *) More extensive health check for DRBG checking many more failure modes.
116 New function FIPS_selftest_drbg_all() to handle every possible DRBG
117 combination: call this in fips_test_suite.
120 *) Add support for Dual EC DRBG from SP800-90. Update DRBG algorithm test
121 and POST to handle Dual EC cases.
124 *) Add support for canonical generation of DSA parameter 'g'. See
127 *) Add support for HMAC DRBG from SP800-90. Update DRBG algorithm test and
128 POST to handle HMAC cases.
131 *) Add functions FIPS_module_version() and FIPS_module_version_text()
132 to return numerical and string versions of the FIPS module number.
135 *) Rename FIPS_mode_set and FIPS_mode to FIPS_module_mode_set and
136 FIPS_module_mode. FIPS_mode and FIPS_mode_set will be implemented
137 outside the validated module in the FIPS capable OpenSSL.
140 *) Minor change to DRBG entropy callback semantics. In some cases
141 there is no multiple of the block length between min_len and
142 max_len. Allow the callback to return more than max_len bytes
143 of entropy but discard any extra: it is the callback's responsibility
144 to ensure that the extra data discarded does not impact the
145 requested amount of entropy.
148 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
149 information in FIPS186-3, SP800-57 and SP800-131A.
152 *) CCM support via EVP. Interface is very similar to GCM case except we
153 must supply all data in one chunk (i.e. no update, final) and the
154 message length must be supplied if AAD is used. Add algorithm test
158 *) Initial version of POST overhaul. Add POST callback to allow the status
159 of POST to be monitored and/or failures induced. Modify fips_test_suite
160 to use callback. Always run all selftests even if one fails.
163 *) XTS support including algorithm test driver in the fips_gcmtest program.
164 Note: this does increase the maximum key length from 32 to 64 bytes but
165 there should be no binary compatibility issues as existing applications
166 will never use XTS mode.
169 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
170 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
171 performs algorithm blocking for unapproved PRNG types. Also do not
172 set PRNG type in FIPS_mode_set(): leave this to the application.
173 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
174 the standard OpenSSL PRNG: set additional data to a date time vector.
177 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
178 This shouldn't present any incompatibility problems because applications
179 shouldn't be using these directly and any that are will need to rethink
180 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
183 *) Extensive self tests and health checking required by SP800-90 DRBG.
184 Remove strength parameter from FIPS_drbg_instantiate and always
185 instantiate at maximum supported strength.
188 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
191 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
194 *) New function DH_compute_key_padded() to compute a DH key and pad with
195 leading zeroes if needed: this complies with SP800-56A et al.
198 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
199 anything, incomplete, subject to change and largely untested at present.
202 *) Modify fipscanisteronly build option to only build the necessary object
203 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
206 *) Add experimental option FIPSSYMS to give all symbols in
207 fipscanister.o and FIPS or fips prefix. This will avoid
208 conflicts with future versions of OpenSSL. Add perl script
209 util/fipsas.pl to preprocess assembly language source files
210 and rename any affected symbols.
213 *) Add selftest checks and algorithm block of non-fips algorithms in
214 FIPS mode. Remove DES2 from selftests.
217 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
218 return internal method without any ENGINE dependencies. Add new
219 tiny fips sign and verify functions.
222 *) New build option no-ec2m to disable characteristic 2 code.
225 *) New build option "fipscanisteronly". This only builds fipscanister.o
226 and (currently) associated fips utilities. Uses the file Makefile.fips
227 instead of Makefile.org as the prototype.
230 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
231 Update fips_gcmtest to use IV generator.
234 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
235 setting output buffer to NULL. The *Final function must be
236 called although it will not retrieve any additional data. The tag
237 can be set or retrieved with a ctrl. The IV length is by default 12
238 bytes (96 bits) but can be set to an alternative value. If the IV
239 length exceeds the maximum IV length (currently 16 bytes) it cannot be
243 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
244 underlying do_cipher function handles all cipher semantics itself
245 including padding and finalisation. This is useful if (for example)
246 an ENGINE cipher handles block padding itself. The behaviour of
247 do_cipher is subtly changed if this flag is set: the return value
248 is the number of characters written to the output buffer (zero is
249 no longer an error code) or a negative error code. Also if the
250 input buffer is NULL and length 0 finalisation should be performed.
253 *) If a candidate issuer certificate is already part of the constructed
254 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
257 *) Improve forward-security support: add functions
259 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
260 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
262 for use by SSL/TLS servers; the callback function will be called whenever a
263 new session is created, and gets to decide whether the session may be
264 cached to make it resumable (return 0) or not (return 1). (As by the
265 SSL/TLS protocol specifications, the session_id sent by the server will be
266 empty to indicate that the session is not resumable; also, the server will
267 not generate RFC 4507 (RFC 5077) session tickets.)
269 A simple reasonable callback implementation is to return is_forward_secure.
270 This parameter will be set to 1 or 0 depending on the ciphersuite selected
271 by the SSL/TLS server library, indicating whether it can provide forward
273 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
275 *) New -verify_name option in command line utilities to set verification
279 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
280 Add CMAC pkey methods.
283 *) Experimental renegotiation in s_server -www mode. If the client
284 browses /reneg connection is renegotiated. If /renegcert it is
285 renegotiated requesting a certificate.
288 *) Add an "external" session cache for debugging purposes to s_server. This
289 should help trace issues which normally are only apparent in deployed
290 multi-process servers.
293 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
294 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
295 BIO_set_cipher() and some obscure PEM functions were changed so they
296 can now return an error. The RAND changes required a change to the
297 RAND_METHOD structure.
300 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
301 a gcc attribute to warn if the result of a function is ignored. This
302 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
303 whose return value is often ignored.
306 Changes between 1.0.1j and 1.0.2 [xx XXX xxxx]
308 *) Accelerated NIST P-256 elliptic curve implementation for x86_64
309 (other platforms pending).
310 [Shay Gueron & Vlad Krasnov (Intel Corp), Andy Polyakov]
312 *) Add support for the SignedCertificateTimestampList certificate and
313 OCSP response extensions from RFC6962.
316 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
317 for corner cases. (Certain input points at infinity could lead to
318 bogus results, with non-infinity inputs mapped to infinity too.)
321 *) Initial support for PowerISA 2.0.7, first implemented in POWER8.
322 This covers AES, SHA256/512 and GHASH. "Initial" means that most
323 common cases are optimized and there still is room for further
324 improvements. Vector Permutation AES for Altivec is also added.
327 *) Add support for little-endian ppc64 Linux target.
328 [Marcelo Cerri (IBM)]
330 *) Initial support for AMRv8 ISA crypto extensions. This covers AES,
331 SHA1, SHA256 and GHASH. "Initial" means that most common cases
332 are optimized and there still is room for further improvements.
333 Both 32- and 64-bit modes are supported.
334 [Andy Polyakov, Ard Biesheuvel (Linaro)]
336 *) Improved ARMv7 NEON support.
339 *) Support for SPARC Architecture 2011 crypto extensions, first
340 implemented in SPARC T4. This covers AES, DES, Camellia, SHA1,
341 SHA256/512, MD5, GHASH and modular exponentiation.
342 [Andy Polyakov, David Miller]
344 *) Accelerated modular exponentiation for Intel processors, a.k.a.
346 [Shay Gueron & Vlad Krasnov (Intel Corp)]
348 *) Support for new and upcoming Intel processors, including AVX2,
349 BMI and SHA ISA extensions. This includes additional "stitched"
350 implementations, AESNI-SHA256 and GCM, and multi-buffer support
353 This work was sponsored by Intel Corp.
356 *) Support for DTLS 1.2. This adds two sets of DTLS methods: DTLS_*_method()
357 supports both DTLS 1.2 and 1.0 and should use whatever version the peer
358 supports and DTLSv1_2_*_method() which supports DTLS 1.2 only.
361 *) Use algorithm specific chains in SSL_CTX_use_certificate_chain_file():
362 this fixes a limiation in previous versions of OpenSSL.
365 *) Extended RSA OAEP support via EVP_PKEY API. Options to specify digest,
366 MGF1 digest and OAEP label.
369 *) Add EVP support for key wrapping algorithms, to avoid problems with
370 existing code the flag EVP_CIPHER_CTX_WRAP_ALLOW has to be set in
371 the EVP_CIPHER_CTX or an error is returned. Add AES and DES3 wrap
372 algorithms and include tests cases.
375 *) Add functions to allocate and set the fields of an ECDSA_METHOD
377 [Douglas E. Engert, Steve Henson]
379 *) New functions OPENSSL_gmtime_diff and ASN1_TIME_diff to find the
380 difference in days and seconds between two tm or ASN1_TIME structures.
383 *) Add -rev test option to s_server to just reverse order of characters
384 received by client and send back to server. Also prints an abbreviated
385 summary of the connection parameters.
388 *) New option -brief for s_client and s_server to print out a brief summary
389 of connection parameters.
392 *) Add callbacks for arbitrary TLS extensions.
393 [Trevor Perrin <trevp@trevp.net> and Ben Laurie]
395 *) New option -crl_download in several openssl utilities to download CRLs
396 from CRLDP extension in certificates.
399 *) New options -CRL and -CRLform for s_client and s_server for CRLs.
402 *) New function X509_CRL_diff to generate a delta CRL from the difference
403 of two full CRLs. Add support to "crl" utility.
406 *) New functions to set lookup_crls function and to retrieve
407 X509_STORE from X509_STORE_CTX.
410 *) Print out deprecated issuer and subject unique ID fields in
414 *) Extend OCSP I/O functions so they can be used for simple general purpose
415 HTTP as well as OCSP. New wrapper function which can be used to download
416 CRLs using the OCSP API.
419 *) Delegate command line handling in s_client/s_server to SSL_CONF APIs.
422 *) SSL_CONF* functions. These provide a common framework for application
423 configuration using configuration files or command lines.
426 *) SSL/TLS tracing code. This parses out SSL/TLS records using the
427 message callback and prints the results. Needs compile time option
428 "enable-ssl-trace". New options to s_client and s_server to enable
432 *) New ctrl and macro to retrieve supported points extensions.
433 Print out extension in s_server and s_client.
436 *) New functions to retrieve certificate signature and signature
440 *) Add functions to retrieve and manipulate the raw cipherlist sent by a
444 *) New Suite B modes for TLS code. These use and enforce the requirements
445 of RFC6460: restrict ciphersuites, only permit Suite B algorithms and
446 only use Suite B curves. The Suite B modes can be set by using the
447 strings "SUITEB128", "SUITEB192" or "SUITEB128ONLY" for the cipherstring.
450 *) New chain verification flags for Suite B levels of security. Check
451 algorithms are acceptable when flags are set in X509_verify_cert.
454 *) Make tls1_check_chain return a set of flags indicating checks passed
455 by a certificate chain. Add additional tests to handle client
456 certificates: checks for matching certificate type and issuer name
460 *) If an attempt is made to use a signature algorithm not in the peer
461 preference list abort the handshake. If client has no suitable
462 signature algorithms in response to a certificate request do not
466 *) If server EC tmp key is not in client preference list abort handshake.
469 *) Add support for certificate stores in CERT structure. This makes it
470 possible to have different stores per SSL structure or one store in
471 the parent SSL_CTX. Include distint stores for certificate chain
472 verification and chain building. New ctrl SSL_CTRL_BUILD_CERT_CHAIN
473 to build and store a certificate chain in CERT structure: returing
474 an error if the chain cannot be built: this will allow applications
475 to test if a chain is correctly configured.
477 Note: if the CERT based stores are not set then the parent SSL_CTX
478 store is used to retain compatibility with existing behaviour.
482 *) New function ssl_set_client_disabled to set a ciphersuite disabled
483 mask based on the current session, check mask when sending client
484 hello and checking the requested ciphersuite.
487 *) New ctrls to retrieve and set certificate types in a certificate
488 request message. Print out received values in s_client. If certificate
489 types is not set with custom values set sensible values based on
490 supported signature algorithms.
493 *) Support for distinct client and server supported signature algorithms.
496 *) Add certificate callback. If set this is called whenever a certificate
497 is required by client or server. An application can decide which
498 certificate chain to present based on arbitrary criteria: for example
499 supported signature algorithms. Add very simple example to s_server.
500 This fixes many of the problems and restrictions of the existing client
501 certificate callback: for example you can now clear an existing
502 certificate and specify the whole chain.
505 *) Add new "valid_flags" field to CERT_PKEY structure which determines what
506 the certificate can be used for (if anything). Set valid_flags field
507 in new tls1_check_chain function. Simplify ssl_set_cert_masks which used
508 to have similar checks in it.
510 Add new "cert_flags" field to CERT structure and include a "strict mode".
511 This enforces some TLS certificate requirements (such as only permitting
512 certificate signature algorithms contained in the supported algorithms
513 extension) which some implementations ignore: this option should be used
514 with caution as it could cause interoperability issues.
517 *) Update and tidy signature algorithm extension processing. Work out
518 shared signature algorithms based on preferences and peer algorithms
519 and print them out in s_client and s_server. Abort handshake if no
520 shared signature algorithms.
523 *) Add new functions to allow customised supported signature algorithms
524 for SSL and SSL_CTX structures. Add options to s_client and s_server
528 *) New function SSL_certs_clear() to delete all references to certificates
529 from an SSL structure. Before this once a certificate had been added
530 it couldn't be removed.
533 *) Integrate hostname, email address and IP address checking with certificate
534 verification. New verify options supporting checking in opensl utility.
537 *) Fixes and wildcard matching support to hostname and email checking
538 functions. Add manual page.
539 [Florian Weimer (Red Hat Product Security Team)]
541 *) New functions to check a hostname email or IP address against a
542 certificate. Add options x509 utility to print results of checks against
546 *) Fix OCSP checking.
547 [Rob Stradling <rob.stradling@comodo.com> and Ben Laurie]
549 *) Initial experimental support for explicitly trusted non-root CAs.
550 OpenSSL still tries to build a complete chain to a root but if an
551 intermediate CA has a trust setting included that is used. The first
552 setting is used: whether to trust (e.g., -addtrust option to the x509
556 *) Add -trusted_first option which attempts to find certificates in the
557 trusted store even if an untrusted chain is also supplied.
560 *) MIPS assembly pack updates: support for MIPS32r2 and SmartMIPS ASE,
561 platform support for Linux and Android.
564 *) Support for linux-x32, ILP32 environment in x86_64 framework.
567 *) Experimental multi-implementation support for FIPS capable OpenSSL.
568 When in FIPS mode the approved implementations are used as normal,
569 when not in FIPS mode the internal unapproved versions are used instead.
570 This means that the FIPS capable OpenSSL isn't forced to use the
571 (often lower performance) FIPS implementations outside FIPS mode.
574 *) Transparently support X9.42 DH parameters when calling
575 PEM_read_bio_DHparameters. This means existing applications can handle
576 the new parameter format automatically.
579 *) Initial experimental support for X9.42 DH parameter format: mainly
580 to support use of 'q' parameter for RFC5114 parameters.
583 *) Add DH parameters from RFC5114 including test data to dhtest.
586 *) Support for automatic EC temporary key parameter selection. If enabled
587 the most preferred EC parameters are automatically used instead of
588 hardcoded fixed parameters. Now a server just has to call:
589 SSL_CTX_set_ecdh_auto(ctx, 1) and the server will automatically
590 support ECDH and use the most appropriate parameters.
593 *) Enhance and tidy EC curve and point format TLS extension code. Use
594 static structures instead of allocation if default values are used.
595 New ctrls to set curves we wish to support and to retrieve shared curves.
596 Print out shared curves in s_server. New options to s_server and s_client
597 to set list of supported curves.
600 *) New ctrls to retrieve supported signature algorithms and
601 supported curve values as an array of NIDs. Extend openssl utility
602 to print out received values.
605 *) Add new APIs EC_curve_nist2nid and EC_curve_nid2nist which convert
606 between NIDs and the more common NIST names such as "P-256". Enhance
607 ecparam utility and ECC method to recognise the NIST names for curves.
610 *) Enhance SSL/TLS certificate chain handling to support different
611 chains for each certificate instead of one chain in the parent SSL_CTX.
614 *) Support for fixed DH ciphersuite client authentication: where both
615 server and client use DH certificates with common parameters.
618 *) Support for fixed DH ciphersuites: those requiring DH server
622 *) New function i2d_re_X509_tbs for re-encoding the TBS portion of
624 Note: Related 1.0.2-beta specific macros X509_get_cert_info,
625 X509_CINF_set_modified, X509_CINF_get_issuer, X509_CINF_get_extensions and
626 X509_CINF_get_signature were reverted post internal team review.
628 Changes between 1.0.1i and 1.0.1j [15 Oct 2014]
632 A flaw in the DTLS SRTP extension parsing code allows an attacker, who
633 sends a carefully crafted handshake message, to cause OpenSSL to fail
634 to free up to 64k of memory causing a memory leak. This could be
635 exploited in a Denial Of Service attack. This issue affects OpenSSL
636 1.0.1 server implementations for both SSL/TLS and DTLS regardless of
637 whether SRTP is used or configured. Implementations of OpenSSL that
638 have been compiled with OPENSSL_NO_SRTP defined are not affected.
640 The fix was developed by the OpenSSL team.
644 *) Session Ticket Memory Leak.
646 When an OpenSSL SSL/TLS/DTLS server receives a session ticket the
647 integrity of that ticket is first verified. In the event of a session
648 ticket integrity check failing, OpenSSL will fail to free memory
649 causing a memory leak. By sending a large number of invalid session
650 tickets an attacker could exploit this issue in a Denial Of Service
655 *) Build option no-ssl3 is incomplete.
657 When OpenSSL is configured with "no-ssl3" as a build option, servers
658 could accept and complete a SSL 3.0 handshake, and clients could be
659 configured to send them.
661 [Akamai and the OpenSSL team]
663 *) Add support for TLS_FALLBACK_SCSV.
664 Client applications doing fallback retries should call
665 SSL_set_mode(s, SSL_MODE_SEND_FALLBACK_SCSV).
667 [Adam Langley, Bodo Moeller]
669 *) Add additional DigestInfo checks.
671 Reencode DigestInto in DER and check against the original when
672 verifying RSA signature: this will reject any improperly encoded
673 DigestInfo structures.
675 Note: this is a precautionary measure and no attacks are currently known.
679 Changes between 1.0.1h and 1.0.1i [6 Aug 2014]
681 *) Fix SRP buffer overrun vulnerability. Invalid parameters passed to the
682 SRP code can be overrun an internal buffer. Add sanity check that
683 g, A, B < N to SRP code.
685 Thanks to Sean Devlin and Watson Ladd of Cryptography Services, NCC
686 Group for discovering this issue.
690 *) A flaw in the OpenSSL SSL/TLS server code causes the server to negotiate
691 TLS 1.0 instead of higher protocol versions when the ClientHello message
692 is badly fragmented. This allows a man-in-the-middle attacker to force a
693 downgrade to TLS 1.0 even if both the server and the client support a
694 higher protocol version, by modifying the client's TLS records.
696 Thanks to David Benjamin and Adam Langley (Google) for discovering and
697 researching this issue.
701 *) OpenSSL DTLS clients enabling anonymous (EC)DH ciphersuites are subject
702 to a denial of service attack. A malicious server can crash the client
703 with a null pointer dereference (read) by specifying an anonymous (EC)DH
704 ciphersuite and sending carefully crafted handshake messages.
706 Thanks to Felix Gröbert (Google) for discovering and researching this
711 *) By sending carefully crafted DTLS packets an attacker could cause openssl
712 to leak memory. This can be exploited through a Denial of Service attack.
713 Thanks to Adam Langley for discovering and researching this issue.
717 *) An attacker can force openssl to consume large amounts of memory whilst
718 processing DTLS handshake messages. This can be exploited through a
719 Denial of Service attack.
720 Thanks to Adam Langley for discovering and researching this issue.
724 *) An attacker can force an error condition which causes openssl to crash
725 whilst processing DTLS packets due to memory being freed twice. This
726 can be exploited through a Denial of Service attack.
727 Thanks to Adam Langley and Wan-Teh Chang for discovering and researching
732 *) If a multithreaded client connects to a malicious server using a resumed
733 session and the server sends an ec point format extension it could write
734 up to 255 bytes to freed memory.
736 Thanks to Gabor Tyukasz (LogMeIn Inc) for discovering and researching this
741 *) A malicious server can crash an OpenSSL client with a null pointer
742 dereference (read) by specifying an SRP ciphersuite even though it was not
743 properly negotiated with the client. This can be exploited through a
744 Denial of Service attack.
746 Thanks to Joonas Kuorilehto and Riku Hietamäki (Codenomicon) for
747 discovering and researching this issue.
751 *) A flaw in OBJ_obj2txt may cause pretty printing functions such as
752 X509_name_oneline, X509_name_print_ex et al. to leak some information
753 from the stack. Applications may be affected if they echo pretty printing
754 output to the attacker.
756 Thanks to Ivan Fratric (Google) for discovering this issue.
758 [Emilia Käsper, and Steve Henson]
760 *) Fix ec_GFp_simple_points_make_affine (thus, EC_POINTs_mul etc.)
761 for corner cases. (Certain input points at infinity could lead to
762 bogus results, with non-infinity inputs mapped to infinity too.)
765 Changes between 1.0.1g and 1.0.1h [5 Jun 2014]
767 *) Fix for SSL/TLS MITM flaw. An attacker using a carefully crafted
768 handshake can force the use of weak keying material in OpenSSL
769 SSL/TLS clients and servers.
771 Thanks to KIKUCHI Masashi (Lepidum Co. Ltd.) for discovering and
772 researching this issue. (CVE-2014-0224)
773 [KIKUCHI Masashi, Steve Henson]
775 *) Fix DTLS recursion flaw. By sending an invalid DTLS handshake to an
776 OpenSSL DTLS client the code can be made to recurse eventually crashing
779 Thanks to Imre Rad (Search-Lab Ltd.) for discovering this issue.
781 [Imre Rad, Steve Henson]
783 *) Fix DTLS invalid fragment vulnerability. A buffer overrun attack can
784 be triggered by sending invalid DTLS fragments to an OpenSSL DTLS
785 client or server. This is potentially exploitable to run arbitrary
786 code on a vulnerable client or server.
788 Thanks to Jüri Aedla for reporting this issue. (CVE-2014-0195)
789 [Jüri Aedla, Steve Henson]
791 *) Fix bug in TLS code where clients enable anonymous ECDH ciphersuites
792 are subject to a denial of service attack.
794 Thanks to Felix Gröbert and Ivan Fratric at Google for discovering
795 this issue. (CVE-2014-3470)
796 [Felix Gröbert, Ivan Fratric, Steve Henson]
798 *) Harmonize version and its documentation. -f flag is used to display
800 [mancha <mancha1@zoho.com>]
802 *) Fix eckey_priv_encode so it immediately returns an error upon a failure
804 [mancha <mancha1@zoho.com>]
806 *) Fix some double frees. These are not thought to be exploitable.
807 [mancha <mancha1@zoho.com>]
809 Changes between 1.0.1f and 1.0.1g [7 Apr 2014]
811 *) A missing bounds check in the handling of the TLS heartbeat extension
812 can be used to reveal up to 64k of memory to a connected client or
815 Thanks for Neel Mehta of Google Security for discovering this bug and to
816 Adam Langley <agl@chromium.org> and Bodo Moeller <bmoeller@acm.org> for
817 preparing the fix (CVE-2014-0160)
818 [Adam Langley, Bodo Moeller]
820 *) Fix for the attack described in the paper "Recovering OpenSSL
821 ECDSA Nonces Using the FLUSH+RELOAD Cache Side-channel Attack"
822 by Yuval Yarom and Naomi Benger. Details can be obtained from:
823 http://eprint.iacr.org/2014/140
825 Thanks to Yuval Yarom and Naomi Benger for discovering this
826 flaw and to Yuval Yarom for supplying a fix (CVE-2014-0076)
827 [Yuval Yarom and Naomi Benger]
829 *) TLS pad extension: draft-agl-tls-padding-03
831 Workaround for the "TLS hang bug" (see FAQ and PR#2771): if the
832 TLS client Hello record length value would otherwise be > 255 and
833 less that 512 pad with a dummy extension containing zeroes so it
834 is at least 512 bytes long.
836 [Adam Langley, Steve Henson]
838 Changes between 1.0.1e and 1.0.1f [6 Jan 2014]
840 *) Fix for TLS record tampering bug. A carefully crafted invalid
841 handshake could crash OpenSSL with a NULL pointer exception.
842 Thanks to Anton Johansson for reporting this issues.
845 *) Keep original DTLS digest and encryption contexts in retransmission
846 structures so we can use the previous session parameters if they need
847 to be resent. (CVE-2013-6450)
850 *) Add option SSL_OP_SAFARI_ECDHE_ECDSA_BUG (part of SSL_OP_ALL) which
851 avoids preferring ECDHE-ECDSA ciphers when the client appears to be
852 Safari on OS X. Safari on OS X 10.8..10.8.3 advertises support for
853 several ECDHE-ECDSA ciphers, but fails to negotiate them. The bug
854 is fixed in OS X 10.8.4, but Apple have ruled out both hot fixing
855 10.8..10.8.3 and forcing users to upgrade to 10.8.4 or newer.
856 [Rob Stradling, Adam Langley]
858 Changes between 1.0.1d and 1.0.1e [11 Feb 2013]
860 *) Correct fix for CVE-2013-0169. The original didn't work on AES-NI
861 supporting platforms or when small records were transferred.
862 [Andy Polyakov, Steve Henson]
864 Changes between 1.0.1c and 1.0.1d [5 Feb 2013]
866 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
868 This addresses the flaw in CBC record processing discovered by
869 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
870 at: http://www.isg.rhul.ac.uk/tls/
872 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
873 Security Group at Royal Holloway, University of London
874 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
875 Emilia Käsper for the initial patch.
877 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
879 *) Fix flaw in AESNI handling of TLS 1.2 and 1.1 records for CBC mode
880 ciphersuites which can be exploited in a denial of service attack.
881 Thanks go to and to Adam Langley <agl@chromium.org> for discovering
882 and detecting this bug and to Wolfgang Ettlinger
883 <wolfgang.ettlinger@gmail.com> for independently discovering this issue.
887 *) Return an error when checking OCSP signatures when key is NULL.
888 This fixes a DoS attack. (CVE-2013-0166)
891 *) Make openssl verify return errors.
892 [Chris Palmer <palmer@google.com> and Ben Laurie]
894 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
895 the right response is stapled. Also change SSL_get_certificate()
896 so it returns the certificate actually sent.
897 See http://rt.openssl.org/Ticket/Display.html?id=2836.
898 [Rob Stradling <rob.stradling@comodo.com>]
900 *) Fix possible deadlock when decoding public keys.
903 *) Don't use TLS 1.0 record version number in initial client hello
907 Changes between 1.0.1b and 1.0.1c [10 May 2012]
909 *) Sanity check record length before skipping explicit IV in TLS
910 1.2, 1.1 and DTLS to fix DoS attack.
912 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
913 fuzzing as a service testing platform.
917 *) Initialise tkeylen properly when encrypting CMS messages.
918 Thanks to Solar Designer of Openwall for reporting this issue.
921 *) In FIPS mode don't try to use composite ciphers as they are not
925 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
927 *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
928 1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
929 mean any application compiled against OpenSSL 1.0.0 headers setting
930 SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
931 TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
932 0x10000000L Any application which was previously compiled against
933 OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
934 will need to be recompiled as a result. Letting be results in
935 inability to disable specifically TLS 1.1 and in client context,
936 in unlike event, limit maximum offered version to TLS 1.0 [see below].
939 *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
940 disable just protocol X, but all protocols above X *if* there are
941 protocols *below* X still enabled. In more practical terms it means
942 that if application wants to disable TLS1.0 in favor of TLS1.1 and
943 above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
944 SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
948 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
950 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
951 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
952 in CRYPTO_realloc_clean.
954 Thanks to Tavis Ormandy, Google Security Team, for discovering this
955 issue and to Adam Langley <agl@chromium.org> for fixing it.
957 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
959 *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
962 *) Workarounds for some broken servers that "hang" if a client hello
963 record length exceeds 255 bytes.
965 1. Do not use record version number > TLS 1.0 in initial client
966 hello: some (but not all) hanging servers will now work.
967 2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
968 the number of ciphers sent in the client hello. This should be
969 set to an even number, such as 50, for example by passing:
970 -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
971 Most broken servers should now work.
972 3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
973 TLS 1.2 client support entirely.
976 *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
979 Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
981 *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
982 STRING form instead of a DigestInfo.
985 *) The format used for MDC2 RSA signatures is inconsistent between EVP
986 and the RSA_sign/RSA_verify functions. This was made more apparent when
987 OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
988 those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
989 the correct format in RSA_verify so both forms transparently work.
992 *) Some servers which support TLS 1.0 can choke if we initially indicate
993 support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
994 encrypted premaster secret. As a workaround use the maximum permitted
995 client version in client hello, this should keep such servers happy
996 and still work with previous versions of OpenSSL.
999 *) Add support for TLS/DTLS heartbeats.
1000 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1002 *) Add support for SCTP.
1003 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1005 *) Improved PRNG seeding for VOS.
1006 [Paul Green <Paul.Green@stratus.com>]
1008 *) Extensive assembler packs updates, most notably:
1010 - x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
1011 - x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
1012 - x86_64: bit-sliced AES implementation;
1013 - ARM: NEON support, contemporary platforms optimizations;
1014 - s390x: z196 support;
1015 - *: GHASH and GF(2^m) multiplication implementations;
1019 *) Make TLS-SRP code conformant with RFC 5054 API cleanup
1020 (removal of unnecessary code)
1021 [Peter Sylvester <peter.sylvester@edelweb.fr>]
1023 *) Add TLS key material exporter from RFC 5705.
1026 *) Add DTLS-SRTP negotiation from RFC 5764.
1029 *) Add Next Protocol Negotiation,
1030 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
1031 disabled with a no-npn flag to config or Configure. Code donated
1033 [Adam Langley <agl@google.com> and Ben Laurie]
1035 *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
1036 NIST-P256, NIST-P521, with constant-time single point multiplication on
1037 typical inputs. Compiler support for the nonstandard type __uint128_t is
1038 required to use this (present in gcc 4.4 and later, for 64-bit builds).
1039 Code made available under Apache License version 2.0.
1041 Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
1042 line to include this in your build of OpenSSL, and run "make depend" (or
1043 "make update"). This enables the following EC_METHODs:
1045 EC_GFp_nistp224_method()
1046 EC_GFp_nistp256_method()
1047 EC_GFp_nistp521_method()
1049 EC_GROUP_new_by_curve_name() will automatically use these (while
1050 EC_GROUP_new_curve_GFp() currently prefers the more flexible
1052 [Emilia Käsper, Adam Langley, Bodo Moeller (Google)]
1054 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
1055 all platforms. Move ssize_t definition from e_os.h to the public
1056 header file e_os2.h as it now appears in public header file cms.h
1059 *) New -sigopt option to the ca, req and x509 utilities. Additional
1060 signature parameters can be passed using this option and in
1064 *) Add RSA PSS signing function. This will generate and set the
1065 appropriate AlgorithmIdentifiers for PSS based on those in the
1066 corresponding EVP_MD_CTX structure. No application support yet.
1069 *) Support for companion algorithm specific ASN1 signing routines.
1070 New function ASN1_item_sign_ctx() signs a pre-initialised
1071 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
1072 the appropriate parameters.
1075 *) Add new algorithm specific ASN1 verification initialisation function
1076 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
1077 handling will be the same no matter what EVP_PKEY_METHOD is used.
1078 Add a PSS handler to support verification of PSS signatures: checked
1079 against a number of sample certificates.
1082 *) Add signature printing for PSS. Add PSS OIDs.
1083 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
1085 *) Add algorithm specific signature printing. An individual ASN1 method
1086 can now print out signatures instead of the standard hex dump.
1088 More complex signatures (e.g. PSS) can print out more meaningful
1089 information. Include DSA version that prints out the signature
1093 *) Password based recipient info support for CMS library: implementing
1097 *) Split password based encryption into PBES2 and PBKDF2 functions. This
1098 neatly separates the code into cipher and PBE sections and is required
1099 for some algorithms that split PBES2 into separate pieces (such as
1100 password based CMS).
1103 *) Session-handling fixes:
1104 - Fix handling of connections that are resuming with a session ID,
1105 but also support Session Tickets.
1106 - Fix a bug that suppressed issuing of a new ticket if the client
1107 presented a ticket with an expired session.
1108 - Try to set the ticket lifetime hint to something reasonable.
1109 - Make tickets shorter by excluding irrelevant information.
1110 - On the client side, don't ignore renewed tickets.
1111 [Adam Langley, Bodo Moeller (Google)]
1113 *) Fix PSK session representation.
1116 *) Add RC4-MD5 and AESNI-SHA1 "stitched" implementations.
1118 This work was sponsored by Intel.
1121 *) Add GCM support to TLS library. Some custom code is needed to split
1122 the IV between the fixed (from PRF) and explicit (from TLS record)
1123 portions. This adds all GCM ciphersuites supported by RFC5288 and
1124 RFC5289. Generalise some AES* cipherstrings to include GCM and
1125 add a special AESGCM string for GCM only.
1128 *) Expand range of ctrls for AES GCM. Permit setting invocation
1129 field on decrypt and retrieval of invocation field only on encrypt.
1132 *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support.
1133 As required by RFC5289 these ciphersuites cannot be used if for
1134 versions of TLS earlier than 1.2.
1137 *) For FIPS capable OpenSSL interpret a NULL default public key method
1138 as unset and return the appropriate default but do *not* set the default.
1139 This means we can return the appropriate method in applications that
1140 switch between FIPS and non-FIPS modes.
1143 *) Redirect HMAC and CMAC operations to FIPS module in FIPS mode. If an
1144 ENGINE is used then we cannot handle that in the FIPS module so we
1145 keep original code iff non-FIPS operations are allowed.
1148 *) Add -attime option to openssl utilities.
1149 [Peter Eckersley <pde@eff.org>, Ben Laurie and Steve Henson]
1151 *) Redirect DSA and DH operations to FIPS module in FIPS mode.
1154 *) Redirect ECDSA and ECDH operations to FIPS module in FIPS mode. Also use
1155 FIPS EC methods unconditionally for now.
1158 *) New build option no-ec2m to disable characteristic 2 code.
1161 *) Backport libcrypto audit of return value checking from 1.1.0-dev; not
1162 all cases can be covered as some introduce binary incompatibilities.
1165 *) Redirect RSA operations to FIPS module including keygen,
1166 encrypt, decrypt, sign and verify. Block use of non FIPS RSA methods.
1169 *) Add similar low level API blocking to ciphers.
1172 *) Low level digest APIs are not approved in FIPS mode: any attempt
1173 to use these will cause a fatal error. Applications that *really* want
1174 to use them can use the private_* version instead.
1177 *) Redirect cipher operations to FIPS module for FIPS builds.
1180 *) Redirect digest operations to FIPS module for FIPS builds.
1183 *) Update build system to add "fips" flag which will link in fipscanister.o
1184 for static and shared library builds embedding a signature if needed.
1187 *) Output TLS supported curves in preference order instead of numerical
1188 order. This is currently hardcoded for the highest order curves first.
1189 This should be configurable so applications can judge speed vs strength.
1192 *) Add TLS v1.2 server support for client authentication.
1195 *) Add support for FIPS mode in ssl library: disable SSLv3, non-FIPS ciphers
1199 *) Functions FIPS_mode_set() and FIPS_mode() which call the underlying
1200 FIPS modules versions.
1203 *) Add TLS v1.2 client side support for client authentication. Keep cache
1204 of handshake records longer as we don't know the hash algorithm to use
1205 until after the certificate request message is received.
1208 *) Initial TLS v1.2 client support. Add a default signature algorithms
1209 extension including all the algorithms we support. Parse new signature
1210 format in client key exchange. Relax some ECC signing restrictions for
1211 TLS v1.2 as indicated in RFC5246.
1214 *) Add server support for TLS v1.2 signature algorithms extension. Switch
1215 to new signature format when needed using client digest preference.
1216 All server ciphersuites should now work correctly in TLS v1.2. No client
1217 support yet and no support for client certificates.
1220 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
1221 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
1222 ciphersuites. At present only RSA key exchange ciphersuites work with
1223 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
1224 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
1225 and version checking.
1228 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
1229 with this defined it will not be affected by any changes to ssl internal
1230 structures. Add several utility functions to allow openssl application
1231 to work with OPENSSL_NO_SSL_INTERN defined.
1235 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
1237 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
1240 *) Permit abbreviated handshakes when renegotiating using the function
1241 SSL_renegotiate_abbreviated().
1242 [Robin Seggelmann <seggelmann@fh-muenster.de>]
1244 *) Add call to ENGINE_register_all_complete() to
1245 ENGINE_load_builtin_engines(), so some implementations get used
1246 automatically instead of needing explicit application support.
1249 *) Add support for TLS key exporter as described in RFC5705.
1250 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
1252 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
1253 a few changes are required:
1255 Add SSL_OP_NO_TLSv1_1 flag.
1256 Add TLSv1_1 methods.
1257 Update version checking logic to handle version 1.1.
1258 Add explicit IV handling (ported from DTLS code).
1259 Add command line options to s_client/s_server.
1262 Changes between 1.0.0j and 1.0.0k [5 Feb 2013]
1264 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
1266 This addresses the flaw in CBC record processing discovered by
1267 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
1268 at: http://www.isg.rhul.ac.uk/tls/
1270 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1271 Security Group at Royal Holloway, University of London
1272 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
1273 Emilia Käsper for the initial patch.
1275 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
1277 *) Return an error when checking OCSP signatures when key is NULL.
1278 This fixes a DoS attack. (CVE-2013-0166)
1281 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
1282 the right response is stapled. Also change SSL_get_certificate()
1283 so it returns the certificate actually sent.
1284 See http://rt.openssl.org/Ticket/Display.html?id=2836.
1285 (This is a backport)
1286 [Rob Stradling <rob.stradling@comodo.com>]
1288 *) Fix possible deadlock when decoding public keys.
1291 Changes between 1.0.0i and 1.0.0j [10 May 2012]
1293 [NB: OpenSSL 1.0.0i and later 1.0.0 patch levels were released after
1296 *) Sanity check record length before skipping explicit IV in DTLS
1299 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
1300 fuzzing as a service testing platform.
1304 *) Initialise tkeylen properly when encrypting CMS messages.
1305 Thanks to Solar Designer of Openwall for reporting this issue.
1308 Changes between 1.0.0h and 1.0.0i [19 Apr 2012]
1310 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
1311 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
1312 in CRYPTO_realloc_clean.
1314 Thanks to Tavis Ormandy, Google Security Team, for discovering this
1315 issue and to Adam Langley <agl@chromium.org> for fixing it.
1317 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
1319 Changes between 1.0.0g and 1.0.0h [12 Mar 2012]
1321 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
1322 in CMS and PKCS7 code. When RSA decryption fails use a random key for
1323 content decryption and always return the same error. Note: this attack
1324 needs on average 2^20 messages so it only affects automated senders. The
1325 old behaviour can be reenabled in the CMS code by setting the
1326 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
1327 an MMA defence is not necessary.
1328 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
1329 this issue. (CVE-2012-0884)
1332 *) Fix CVE-2011-4619: make sure we really are receiving a
1333 client hello before rejecting multiple SGC restarts. Thanks to
1334 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
1337 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
1339 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
1340 Thanks to Antonio Martin, Enterprise Secure Access Research and
1341 Development, Cisco Systems, Inc. for discovering this bug and
1342 preparing a fix. (CVE-2012-0050)
1345 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
1347 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
1348 of the Vaudenay padding oracle attack on CBC mode encryption
1349 which enables an efficient plaintext recovery attack against
1350 the OpenSSL implementation of DTLS. Their attack exploits timing
1351 differences arising during decryption processing. A research
1352 paper describing this attack can be found at:
1353 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
1354 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
1355 Security Group at Royal Holloway, University of London
1356 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
1357 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
1358 for preparing the fix. (CVE-2011-4108)
1359 [Robin Seggelmann, Michael Tuexen]
1361 *) Clear bytes used for block padding of SSL 3.0 records.
1363 [Adam Langley (Google)]
1365 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1366 Kadianakis <desnacked@gmail.com> for discovering this issue and
1367 Adam Langley for preparing the fix. (CVE-2011-4619)
1368 [Adam Langley (Google)]
1370 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
1371 [Andrey Kulikov <amdeich@gmail.com>]
1373 *) Prevent malformed RFC3779 data triggering an assertion failure.
1374 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1375 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1376 [Rob Austein <sra@hactrn.net>]
1378 *) Improved PRNG seeding for VOS.
1379 [Paul Green <Paul.Green@stratus.com>]
1381 *) Fix ssl_ciph.c set-up race.
1382 [Adam Langley (Google)]
1384 *) Fix spurious failures in ecdsatest.c.
1385 [Emilia Käsper (Google)]
1387 *) Fix the BIO_f_buffer() implementation (which was mixing different
1388 interpretations of the '..._len' fields).
1389 [Adam Langley (Google)]
1391 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1392 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1393 threads won't reuse the same blinding coefficients.
1395 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1396 lock to call BN_BLINDING_invert_ex, and avoids one use of
1397 BN_BLINDING_update for each BN_BLINDING structure (previously,
1398 the last update always remained unused).
1399 [Emilia Käsper (Google)]
1401 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
1402 [Bob Buckholz (Google)]
1404 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
1406 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
1407 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
1408 [Kaspar Brand <ossl@velox.ch>]
1410 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1411 for multi-threaded use of ECDH. (CVE-2011-3210)
1412 [Adam Langley (Google)]
1414 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1417 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
1418 signature public key algorithm by using OID xref utilities instead.
1419 Before this you could only use some ECC ciphersuites with SHA1 only.
1422 *) Add protection against ECDSA timing attacks as mentioned in the paper
1423 by Billy Bob Brumley and Nicola Tuveri, see:
1425 http://eprint.iacr.org/2011/232.pdf
1427 [Billy Bob Brumley and Nicola Tuveri]
1429 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
1431 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1432 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1434 *) Fix bug in string printing code: if *any* escaping is enabled we must
1435 escape the escape character (backslash) or the resulting string is
1439 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
1441 *) Disable code workaround for ancient and obsolete Netscape browsers
1442 and servers: an attacker can use it in a ciphersuite downgrade attack.
1443 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1446 *) Fixed J-PAKE implementation error, originally discovered by
1447 Sebastien Martini, further info and confirmation from Stefan
1448 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1451 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
1453 *) Fix extension code to avoid race conditions which can result in a buffer
1454 overrun vulnerability: resumed sessions must not be modified as they can
1455 be shared by multiple threads. CVE-2010-3864
1458 *) Fix WIN32 build system to correctly link an ENGINE directory into
1462 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
1464 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
1466 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
1468 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
1470 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
1471 context. The operation can be customised via the ctrl mechanism in
1472 case ENGINEs want to include additional functionality.
1475 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
1478 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
1479 output hashes compatible with older versions of OpenSSL.
1480 [Willy Weisz <weisz@vcpc.univie.ac.at>]
1482 *) Fix compression algorithm handling: if resuming a session use the
1483 compression algorithm of the resumed session instead of determining
1484 it from client hello again. Don't allow server to change algorithm.
1487 *) Add load_crls() function to apps tidying load_certs() too. Add option
1488 to verify utility to allow additional CRLs to be included.
1491 *) Update OCSP request code to permit adding custom headers to the request:
1492 some responders need this.
1495 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
1497 [Julia Lawall <julia@diku.dk>]
1499 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
1500 needlessly dereferenced structures, used obsolete functions and
1501 didn't handle all updated verify codes correctly.
1504 *) Disable MD2 in the default configuration.
1507 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
1508 indicate the initial BIO being pushed or popped. This makes it possible
1509 to determine whether the BIO is the one explicitly called or as a result
1510 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
1511 it handles reference counts correctly and doesn't zero out the I/O bio
1512 when it is not being explicitly popped. WARNING: applications which
1513 included workarounds for the old buggy behaviour will need to be modified
1514 or they could free up already freed BIOs.
1517 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
1518 renaming to all platforms (within the 0.9.8 branch, this was
1519 done conditionally on Netware platforms to avoid a name clash).
1520 [Guenter <lists@gknw.net>]
1522 *) Add ECDHE and PSK support to DTLS.
1523 [Michael Tuexen <tuexen@fh-muenster.de>]
1525 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
1529 *) Add "missing" function EVP_MD_flags() (without this the only way to
1530 retrieve a digest flags is by accessing the structure directly. Update
1531 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
1532 or cipher is registered as in the "from" argument. Print out all
1533 registered digests in the dgst usage message instead of manually
1534 attempting to work them out.
1537 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
1538 this allows the use of compression and extensions. Change default cipher
1539 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
1540 by default unless an application cipher string requests it.
1543 *) Alter match criteria in PKCS12_parse(). It used to try to use local
1544 key ids to find matching certificates and keys but some PKCS#12 files
1545 don't follow the (somewhat unwritten) rules and this strategy fails.
1546 Now just gather all certificates together and the first private key
1547 then look for the first certificate that matches the key.
1550 *) Support use of registered digest and cipher names for dgst and cipher
1551 commands instead of having to add each one as a special case. So now
1558 openssl dgst -sha256 foo
1560 and this works for ENGINE based algorithms too.
1564 *) Update Gost ENGINE to support parameter files.
1565 [Victor B. Wagner <vitus@cryptocom.ru>]
1567 *) Support GeneralizedTime in ca utility.
1568 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
1570 *) Enhance the hash format used for certificate directory links. The new
1571 form uses the canonical encoding (meaning equivalent names will work
1572 even if they aren't identical) and uses SHA1 instead of MD5. This form
1573 is incompatible with the older format and as a result c_rehash should
1574 be used to rebuild symbolic links.
1577 *) Make PKCS#8 the default write format for private keys, replacing the
1578 traditional format. This form is standardised, more secure and doesn't
1579 include an implicit MD5 dependency.
1582 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
1583 committed to OpenSSL should pass this lot as a minimum.
1586 *) Add session ticket override functionality for use by EAP-FAST.
1587 [Jouni Malinen <j@w1.fi>]
1589 *) Modify HMAC functions to return a value. Since these can be implemented
1590 in an ENGINE errors can occur.
1593 *) Type-checked OBJ_bsearch_ex.
1596 *) Type-checked OBJ_bsearch. Also some constification necessitated
1597 by type-checking. Still to come: TXT_DB, bsearch(?),
1598 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
1602 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
1603 seconds to a tm structure directly, instead of going through OS
1604 specific date routines. This avoids any issues with OS routines such
1605 as the year 2038 bug. New *_adj() functions for ASN1 time structures
1606 and X509_time_adj_ex() to cover the extended range. The existing
1607 X509_time_adj() is still usable and will no longer have any date issues.
1610 *) Delta CRL support. New use deltas option which will attempt to locate
1611 and search any appropriate delta CRLs available.
1613 This work was sponsored by Google.
1616 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
1617 code and add additional score elements. Validate alternate CRL paths
1618 as part of the CRL checking and indicate a new error "CRL path validation
1619 error" in this case. Applications wanting additional details can use
1620 the verify callback and check the new "parent" field. If this is not
1621 NULL CRL path validation is taking place. Existing applications wont
1622 see this because it requires extended CRL support which is off by
1625 This work was sponsored by Google.
1628 *) Support for freshest CRL extension.
1630 This work was sponsored by Google.
1633 *) Initial indirect CRL support. Currently only supported in the CRLs
1634 passed directly and not via lookup. Process certificate issuer
1635 CRL entry extension and lookup CRL entries by bother issuer name
1636 and serial number. Check and process CRL issuer entry in IDP extension.
1638 This work was sponsored by Google.
1641 *) Add support for distinct certificate and CRL paths. The CRL issuer
1642 certificate is validated separately in this case. Only enabled if
1643 an extended CRL support flag is set: this flag will enable additional
1644 CRL functionality in future.
1646 This work was sponsored by Google.
1649 *) Add support for policy mappings extension.
1651 This work was sponsored by Google.
1654 *) Fixes to pathlength constraint, self issued certificate handling,
1655 policy processing to align with RFC3280 and PKITS tests.
1657 This work was sponsored by Google.
1660 *) Support for name constraints certificate extension. DN, email, DNS
1661 and URI types are currently supported.
1663 This work was sponsored by Google.
1666 *) To cater for systems that provide a pointer-based thread ID rather
1667 than numeric, deprecate the current numeric thread ID mechanism and
1668 replace it with a structure and associated callback type. This
1669 mechanism allows a numeric "hash" to be extracted from a thread ID in
1670 either case, and on platforms where pointers are larger than 'long',
1671 mixing is done to help ensure the numeric 'hash' is usable even if it
1672 can't be guaranteed unique. The default mechanism is to use "&errno"
1673 as a pointer-based thread ID to distinguish between threads.
1675 Applications that want to provide their own thread IDs should now use
1676 CRYPTO_THREADID_set_callback() to register a callback that will call
1677 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
1679 Note that ERR_remove_state() is now deprecated, because it is tied
1680 to the assumption that thread IDs are numeric. ERR_remove_state(0)
1681 to free the current thread's error state should be replaced by
1682 ERR_remove_thread_state(NULL).
1684 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
1685 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
1686 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
1687 application was previously providing a numeric thread callback that
1688 was inappropriate for distinguishing threads, then uniqueness might
1689 have been obtained with &errno that happened immediately in the
1690 intermediate development versions of OpenSSL; this is no longer the
1691 case, the numeric thread callback will now override the automatic use
1693 [Geoff Thorpe, with help from Bodo Moeller]
1695 *) Initial support for different CRL issuing certificates. This covers a
1696 simple case where the self issued certificates in the chain exist and
1697 the real CRL issuer is higher in the existing chain.
1699 This work was sponsored by Google.
1702 *) Removed effectively defunct crypto/store from the build.
1705 *) Revamp of STACK to provide stronger type-checking. Still to come:
1706 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
1707 ASN1_STRING, CONF_VALUE.
1710 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
1711 RAM on SSL connections. This option can save about 34k per idle SSL.
1714 *) Revamp of LHASH to provide stronger type-checking. Still to come:
1715 STACK, TXT_DB, bsearch, qsort.
1718 *) Initial support for Cryptographic Message Syntax (aka CMS) based
1719 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
1720 support for data, signedData, compressedData, digestedData and
1721 encryptedData, envelopedData types included. Scripts to check against
1722 RFC4134 examples draft and interop and consistency checks of many
1723 content types and variants.
1726 *) Add options to enc utility to support use of zlib compression BIO.
1729 *) Extend mk1mf to support importing of options and assembly language
1730 files from Configure script, currently only included in VC-WIN32.
1731 The assembly language rules can now optionally generate the source
1732 files from the associated perl scripts.
1735 *) Implement remaining functionality needed to support GOST ciphersuites.
1736 Interop testing has been performed using CryptoPro implementations.
1737 [Victor B. Wagner <vitus@cryptocom.ru>]
1739 *) s390x assembler pack.
1742 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
1746 *) Implement Opaque PRF Input TLS extension as specified in
1747 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
1748 official specification yet and no extension type assignment by
1749 IANA exists, this extension (for now) will have to be explicitly
1750 enabled when building OpenSSL by providing the extension number
1751 to use. For example, specify an option
1753 -DTLSEXT_TYPE_opaque_prf_input=0x9527
1755 to the "config" or "Configure" script to enable the extension,
1756 assuming extension number 0x9527 (which is a completely arbitrary
1757 and unofficial assignment based on the MD5 hash of the Internet
1758 Draft). Note that by doing so, you potentially lose
1759 interoperability with other TLS implementations since these might
1760 be using the same extension number for other purposes.
1762 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
1763 opaque PRF input value to use in the handshake. This will create
1764 an interal copy of the length-'len' string at 'src', and will
1765 return non-zero for success.
1767 To get more control and flexibility, provide a callback function
1770 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
1771 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
1775 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
1778 Callback function 'cb' will be called in handshakes, and is
1779 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
1780 Argument 'arg' is for application purposes (the value as given to
1781 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
1782 be provided to the callback function). The callback function
1783 has to return non-zero to report success: usually 1 to use opaque
1784 PRF input just if possible, or 2 to enforce use of the opaque PRF
1785 input. In the latter case, the library will abort the handshake
1786 if opaque PRF input is not successfully negotiated.
1788 Arguments 'peerinput' and 'len' given to the callback function
1789 will always be NULL and 0 in the case of a client. A server will
1790 see the client's opaque PRF input through these variables if
1791 available (NULL and 0 otherwise). Note that if the server
1792 provides an opaque PRF input, the length must be the same as the
1793 length of the client's opaque PRF input.
1795 Note that the callback function will only be called when creating
1796 a new session (session resumption can resume whatever was
1797 previously negotiated), and will not be called in SSL 2.0
1798 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
1799 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
1800 for applications that need to enforce opaque PRF input.
1804 *) Update ssl code to support digests other than SHA1+MD5 for handshake
1807 [Victor B. Wagner <vitus@cryptocom.ru>]
1809 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1810 RFC4507bis. The encrypted ticket format is an encrypted encoded
1811 SSL_SESSION structure, that way new session features are automatically
1814 If a client application caches session in an SSL_SESSION structure
1815 support is transparent because tickets are now stored in the encoded
1818 The SSL_CTX structure automatically generates keys for ticket
1819 protection in servers so again support should be possible
1820 with no application modification.
1822 If a client or server wishes to disable RFC4507 support then the option
1823 SSL_OP_NO_TICKET can be set.
1825 Add a TLS extension debugging callback to allow the contents of any client
1826 or server extensions to be examined.
1828 This work was sponsored by Google.
1831 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
1832 OpenSSL should now compile cleanly on gcc 4.2
1833 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
1835 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
1836 support including streaming MAC support: this is required for GOST
1837 ciphersuite support.
1838 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
1840 *) Add option -stream to use PKCS#7 streaming in smime utility. New
1841 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
1842 to output in BER and PEM format.
1845 *) Experimental support for use of HMAC via EVP_PKEY interface. This
1846 allows HMAC to be handled via the EVP_DigestSign*() interface. The
1847 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
1848 ENGINE support for HMAC keys which are unextractable. New -mac and
1849 -macopt options to dgst utility.
1852 *) New option -sigopt to dgst utility. Update dgst to use
1853 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
1854 alternative signing paramaters such as X9.31 or PSS in the dgst
1858 *) Change ssl_cipher_apply_rule(), the internal function that does
1859 the work each time a ciphersuite string requests enabling
1860 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
1861 removing ("!foo+bar") a class of ciphersuites: Now it maintains
1862 the order of disabled ciphersuites such that those ciphersuites
1863 that most recently went from enabled to disabled not only stay
1864 in order with respect to each other, but also have higher priority
1865 than other disabled ciphersuites the next time ciphersuites are
1868 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
1869 the same ciphersuites as with "HIGH" alone, but in a specific
1870 order where the PSK ciphersuites come first (since they are the
1871 most recently disabled ciphersuites when "HIGH" is parsed).
1873 Also, change ssl_create_cipher_list() (using this new
1874 funcionality) such that between otherwise identical
1875 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
1879 *) Change ssl_create_cipher_list() so that it automatically
1880 arranges the ciphersuites in reasonable order before starting
1881 to process the rule string. Thus, the definition for "DEFAULT"
1882 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
1883 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
1884 This makes it much easier to arrive at a reasonable default order
1885 in applications for which anonymous ciphers are OK (meaning
1886 that you can't actually use DEFAULT).
1887 [Bodo Moeller; suggested by Victor Duchovni]
1889 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
1890 processing) into multiple integers instead of setting
1891 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
1892 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
1893 (These masks as well as the individual bit definitions are hidden
1894 away into the non-exported interface ssl/ssl_locl.h, so this
1895 change to the definition of the SSL_CIPHER structure shouldn't
1896 affect applications.) This give us more bits for each of these
1897 categories, so there is no longer a need to coagulate AES128 and
1898 AES256 into a single algorithm bit, and to coagulate Camellia128
1899 and Camellia256 into a single algorithm bit, which has led to all
1902 Thus, among other things, the kludge introduced in 0.9.7m and
1903 0.9.8e for masking out AES256 independently of AES128 or masking
1904 out Camellia256 independently of AES256 is not needed here in 0.9.9.
1906 With the change, we also introduce new ciphersuite aliases that
1907 so far were missing: "AES128", "AES256", "CAMELLIA128", and
1911 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
1912 Use the leftmost N bytes of the signature input if the input is
1913 larger than the prime q (with N being the size in bytes of q).
1916 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
1917 it yet and it is largely untested.
1920 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
1923 *) Initial incomplete changes to avoid need for function casts in OpenSSL
1924 some compilers (gcc 4.2 and later) reject their use. Safestack is
1925 reimplemented. Update ASN1 to avoid use of legacy functions.
1928 *) Win32/64 targets are linked with Winsock2.
1931 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
1932 to external functions. This can be used to increase CRL handling
1933 efficiency especially when CRLs are very large by (for example) storing
1934 the CRL revoked certificates in a database.
1937 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
1938 new CRLs added to a directory can be used. New command line option
1939 -verify_return_error to s_client and s_server. This causes real errors
1940 to be returned by the verify callback instead of carrying on no matter
1941 what. This reflects the way a "real world" verify callback would behave.
1944 *) GOST engine, supporting several GOST algorithms and public key formats.
1945 Kindly donated by Cryptocom.
1948 *) Partial support for Issuing Distribution Point CRL extension. CRLs
1949 partitioned by DP are handled but no indirect CRL or reason partitioning
1950 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
1951 selected via a scoring technique which handles IDP and AKID in CRLs.
1954 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
1955 will ultimately be used for all verify operations: this will remove the
1956 X509_STORE dependency on certificate verification and allow alternative
1957 lookup methods. X509_STORE based implementations of these two callbacks.
1960 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
1961 Modify get_crl() to find a valid (unexpired) CRL if possible.
1964 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
1965 this would be called X509_CRL_cmp() but that name is already used by
1966 a function that just compares CRL issuer names. Cache several CRL
1967 extensions in X509_CRL structure and cache CRLDP in X509.
1970 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
1971 this maps equivalent X509_NAME structures into a consistent structure.
1972 Name comparison can then be performed rapidly using memcmp().
1975 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
1979 *) Allow digests to supply their own micalg string for S/MIME type using
1980 the ctrl EVP_MD_CTRL_MICALG.
1983 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
1984 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
1985 ctrl. It can then customise the structure before and/or after signing
1989 *) New function OBJ_add_sigid() to allow application defined signature OIDs
1990 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
1991 to free up any added signature OIDs.
1994 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
1995 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
1996 digest and cipher tables. New options added to openssl utility:
1997 list-message-digest-algorithms and list-cipher-algorithms.
2000 *) Change the array representation of binary polynomials: the list
2001 of degrees of non-zero coefficients is now terminated with -1.
2002 Previously it was terminated with 0, which was also part of the
2003 value; thus, the array representation was not applicable to
2004 polynomials where t^0 has coefficient zero. This change makes
2005 the array representation useful in a more general context.
2008 *) Various modifications and fixes to SSL/TLS cipher string
2009 handling. For ECC, the code now distinguishes between fixed ECDH
2010 with RSA certificates on the one hand and with ECDSA certificates
2011 on the other hand, since these are separate ciphersuites. The
2012 unused code for Fortezza ciphersuites has been removed.
2014 For consistency with EDH, ephemeral ECDH is now called "EECDH"
2015 (not "ECDHE"). For consistency with the code for DH
2016 certificates, use of ECDH certificates is now considered ECDH
2017 authentication, not RSA or ECDSA authentication (the latter is
2018 merely the CA's signing algorithm and not actively used in the
2021 The temporary ciphersuite alias "ECCdraft" is no longer
2022 available, and ECC ciphersuites are no longer excluded from "ALL"
2023 and "DEFAULT". The following aliases now exist for RFC 4492
2024 ciphersuites, most of these by analogy with the DH case:
2026 kECDHr - ECDH cert, signed with RSA
2027 kECDHe - ECDH cert, signed with ECDSA
2028 kECDH - ECDH cert (signed with either RSA or ECDSA)
2029 kEECDH - ephemeral ECDH
2030 ECDH - ECDH cert or ephemeral ECDH
2036 AECDH - anonymous ECDH
2037 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
2041 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
2042 Use correct micalg parameters depending on digest(s) in signed message.
2045 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
2046 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
2049 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
2050 an engine to register a method. Add ENGINE lookups for methods and
2051 functional reference processing.
2054 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
2055 EVP_{Sign,Verify}* which allow an application to customise the signature
2059 *) New -resign option to smime utility. This adds one or more signers
2060 to an existing PKCS#7 signedData structure. Also -md option to use an
2061 alternative message digest algorithm for signing.
2064 *) Tidy up PKCS#7 routines and add new functions to make it easier to
2065 create PKCS7 structures containing multiple signers. Update smime
2066 application to support multiple signers.
2069 *) New -macalg option to pkcs12 utility to allow setting of an alternative
2073 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
2074 Reorganize PBE internals to lookup from a static table using NIDs,
2075 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
2076 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
2077 PRF which will be automatically used with PBES2.
2080 *) Replace the algorithm specific calls to generate keys in "req" with the
2084 *) Update PKCS#7 enveloped data routines to use new API. This is now
2085 supported by any public key method supporting the encrypt operation. A
2086 ctrl is added to allow the public key algorithm to examine or modify
2087 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
2091 *) Add a ctrl to asn1 method to allow a public key algorithm to express
2092 a default digest type to use. In most cases this will be SHA1 but some
2093 algorithms (such as GOST) need to specify an alternative digest. The
2094 return value indicates how strong the preference is 1 means optional and
2095 2 is mandatory (that is it is the only supported type). Modify
2096 ASN1_item_sign() to accept a NULL digest argument to indicate it should
2097 use the default md. Update openssl utilities to use the default digest
2098 type for signing if it is not explicitly indicated.
2101 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
2102 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
2103 signing method from the key type. This effectively removes the link
2104 between digests and public key types.
2107 *) Add an OID cross reference table and utility functions. Its purpose is to
2108 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
2109 rsaEncryption. This will allow some of the algorithm specific hackery
2110 needed to use the correct OID to be removed.
2113 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
2114 structures for PKCS7_sign(). They are now set up by the relevant public
2118 *) Add provisional EC pkey method with support for ECDSA and ECDH.
2121 *) Add support for key derivation (agreement) in the API, DH method and
2125 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
2126 public and private key formats. As a side effect these add additional
2127 command line functionality not previously available: DSA signatures can be
2128 generated and verified using pkeyutl and DH key support and generation in
2133 [Oliver Tappe <zooey@hirschkaefer.de>]
2135 *) New make target "install_html_docs" installs HTML renditions of the
2137 [Oliver Tappe <zooey@hirschkaefer.de>]
2139 *) New utility "genpkey" this is analogous to "genrsa" etc except it can
2140 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
2141 support key and parameter generation and add initial key generation
2142 functionality for RSA.
2145 *) Add functions for main EVP_PKEY_method operations. The undocumented
2146 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
2147 EVP_PKEY_{encrypt,decrypt}_old.
2150 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
2151 key API, doesn't do much yet.
2154 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
2155 public key algorithms. New option to openssl utility:
2156 "list-public-key-algorithms" to print out info.
2159 *) Implement the Supported Elliptic Curves Extension for
2160 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2163 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
2164 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
2167 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
2168 utilities such as rsa, dsa, dsaparam etc except they process any key
2172 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
2173 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
2174 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
2178 *) Initial support for pluggable public key ASN1.
2179 De-spaghettify the public key ASN1 handling. Move public and private
2180 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
2181 algorithm specific handling to a single module within the relevant
2182 algorithm directory. Add functions to allow (near) opaque processing
2183 of public and private key structures.
2186 *) Implement the Supported Point Formats Extension for
2187 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
2190 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
2191 for the psk identity [hint] and the psk callback functions to the
2192 SSL_SESSION, SSL and SSL_CTX structure.
2195 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
2199 SSL_CTX_use_psk_identity_hint
2200 SSL_get_psk_identity_hint
2201 SSL_get_psk_identity
2202 SSL_use_psk_identity_hint
2204 [Mika Kousa and Pasi Eronen of Nokia Corporation]
2206 *) Add RFC 3161 compliant time stamp request creation, response generation
2207 and response verification functionality.
2208 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
2210 *) Add initial support for TLS extensions, specifically for the server_name
2211 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
2212 have new members for a host name. The SSL data structure has an
2213 additional member SSL_CTX *initial_ctx so that new sessions can be
2214 stored in that context to allow for session resumption, even after the
2215 SSL has been switched to a new SSL_CTX in reaction to a client's
2216 server_name extension.
2218 New functions (subject to change):
2220 SSL_get_servername()
2221 SSL_get_servername_type()
2224 New CTRL codes and macros (subject to change):
2226 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
2227 - SSL_CTX_set_tlsext_servername_callback()
2228 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
2229 - SSL_CTX_set_tlsext_servername_arg()
2230 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
2232 openssl s_client has a new '-servername ...' option.
2234 openssl s_server has new options '-servername_host ...', '-cert2 ...',
2235 '-key2 ...', '-servername_fatal' (subject to change). This allows
2236 testing the HostName extension for a specific single host name ('-cert'
2237 and '-key' remain fallbacks for handshakes without HostName
2238 negotiation). If the unrecognized_name alert has to be sent, this by
2239 default is a warning; it becomes fatal with the '-servername_fatal'
2242 [Peter Sylvester, Remy Allais, Christophe Renou]
2244 *) Whirlpool hash implementation is added.
2247 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
2248 bn(64,32). Because of instruction set limitations it doesn't have
2249 any negative impact on performance. This was done mostly in order
2250 to make it possible to share assembler modules, such as bn_mul_mont
2251 implementations, between 32- and 64-bit builds without hassle.
2254 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
2255 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
2259 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
2260 dedicated Montgomery multiplication procedure, is introduced.
2261 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
2262 "64-bit" performance on certain 32-bit targets.
2265 *) New option SSL_OP_NO_COMP to disable use of compression selectively
2266 in SSL structures. New SSL ctrl to set maximum send fragment size.
2267 Save memory by seeting the I/O buffer sizes dynamically instead of
2268 using the maximum available value.
2271 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
2272 in addition to the text details.
2275 *) Very, very preliminary EXPERIMENTAL support for printing of general
2276 ASN1 structures. This currently produces rather ugly output and doesn't
2277 handle several customised structures at all.
2280 *) Integrated support for PVK file format and some related formats such
2281 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
2282 these in the 'rsa' and 'dsa' utilities.
2285 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
2288 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
2289 place for the (very old) "NETSCAPE" format certificates which are now
2290 handled using new ASN1 code equivalents.
2293 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
2294 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
2295 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
2298 *) Modify CRL distribution points extension code to print out previously
2299 unsupported fields. Enhance extension setting code to allow setting of
2303 *) Add print and set support for Issuing Distribution Point CRL extension.
2306 *) Change 'Configure' script to enable Camellia by default.
2309 Changes between 0.9.8x and 0.9.8y [5 Feb 2013]
2311 *) Make the decoding of SSLv3, TLS and DTLS CBC records constant time.
2313 This addresses the flaw in CBC record processing discovered by
2314 Nadhem Alfardan and Kenny Paterson. Details of this attack can be found
2315 at: http://www.isg.rhul.ac.uk/tls/
2317 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
2318 Security Group at Royal Holloway, University of London
2319 (www.isg.rhul.ac.uk) for discovering this flaw and Adam Langley and
2320 Emilia Käsper for the initial patch.
2322 [Emilia Käsper, Adam Langley, Ben Laurie, Andy Polyakov, Steve Henson]
2324 *) Return an error when checking OCSP signatures when key is NULL.
2325 This fixes a DoS attack. (CVE-2013-0166)
2328 *) Call OCSP Stapling callback after ciphersuite has been chosen, so
2329 the right response is stapled. Also change SSL_get_certificate()
2330 so it returns the certificate actually sent.
2331 See http://rt.openssl.org/Ticket/Display.html?id=2836.
2332 (This is a backport)
2333 [Rob Stradling <rob.stradling@comodo.com>]
2335 *) Fix possible deadlock when decoding public keys.
2338 Changes between 0.9.8w and 0.9.8x [10 May 2012]
2340 *) Sanity check record length before skipping explicit IV in DTLS
2343 Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
2344 fuzzing as a service testing platform.
2348 *) Initialise tkeylen properly when encrypting CMS messages.
2349 Thanks to Solar Designer of Openwall for reporting this issue.
2352 Changes between 0.9.8v and 0.9.8w [23 Apr 2012]
2354 *) The fix for CVE-2012-2110 did not take into account that the
2355 'len' argument to BUF_MEM_grow and BUF_MEM_grow_clean is an
2356 int in OpenSSL 0.9.8, making it still vulnerable. Fix by
2357 rejecting negative len parameter. (CVE-2012-2131)
2358 [Tomas Hoger <thoger@redhat.com>]
2360 Changes between 0.9.8u and 0.9.8v [19 Apr 2012]
2362 *) Check for potentially exploitable overflows in asn1_d2i_read_bio
2363 BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
2364 in CRYPTO_realloc_clean.
2366 Thanks to Tavis Ormandy, Google Security Team, for discovering this
2367 issue and to Adam Langley <agl@chromium.org> for fixing it.
2369 [Adam Langley (Google), Tavis Ormandy, Google Security Team]
2371 Changes between 0.9.8t and 0.9.8u [12 Mar 2012]
2373 *) Fix MMA (Bleichenbacher's attack on PKCS #1 v1.5 RSA padding) weakness
2374 in CMS and PKCS7 code. When RSA decryption fails use a random key for
2375 content decryption and always return the same error. Note: this attack
2376 needs on average 2^20 messages so it only affects automated senders. The
2377 old behaviour can be reenabled in the CMS code by setting the
2378 CMS_DEBUG_DECRYPT flag: this is useful for debugging and testing where
2379 an MMA defence is not necessary.
2380 Thanks to Ivan Nestlerode <inestlerode@us.ibm.com> for discovering
2381 this issue. (CVE-2012-0884)
2384 *) Fix CVE-2011-4619: make sure we really are receiving a
2385 client hello before rejecting multiple SGC restarts. Thanks to
2386 Ivan Nestlerode <inestlerode@us.ibm.com> for discovering this bug.
2389 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
2391 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
2392 Thanks to Antonio Martin, Enterprise Secure Access Research and
2393 Development, Cisco Systems, Inc. for discovering this bug and
2394 preparing a fix. (CVE-2012-0050)
2397 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
2399 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
2400 of the Vaudenay padding oracle attack on CBC mode encryption
2401 which enables an efficient plaintext recovery attack against
2402 the OpenSSL implementation of DTLS. Their attack exploits timing
2403 differences arising during decryption processing. A research
2404 paper describing this attack can be found at:
2405 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
2406 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
2407 Security Group at Royal Holloway, University of London
2408 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
2409 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
2410 for preparing the fix. (CVE-2011-4108)
2411 [Robin Seggelmann, Michael Tuexen]
2413 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
2414 [Ben Laurie, Kasper <ekasper@google.com>]
2416 *) Clear bytes used for block padding of SSL 3.0 records.
2418 [Adam Langley (Google)]
2420 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
2421 Kadianakis <desnacked@gmail.com> for discovering this issue and
2422 Adam Langley for preparing the fix. (CVE-2011-4619)
2423 [Adam Langley (Google)]
2425 *) Prevent malformed RFC3779 data triggering an assertion failure.
2426 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
2427 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
2428 [Rob Austein <sra@hactrn.net>]
2430 *) Fix ssl_ciph.c set-up race.
2431 [Adam Langley (Google)]
2433 *) Fix spurious failures in ecdsatest.c.
2434 [Emilia Käsper (Google)]
2436 *) Fix the BIO_f_buffer() implementation (which was mixing different
2437 interpretations of the '..._len' fields).
2438 [Adam Langley (Google)]
2440 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
2441 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
2442 threads won't reuse the same blinding coefficients.
2444 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
2445 lock to call BN_BLINDING_invert_ex, and avoids one use of
2446 BN_BLINDING_update for each BN_BLINDING structure (previously,
2447 the last update always remained unused).
2448 [Emilia Käsper (Google)]
2450 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
2451 for multi-threaded use of ECDH.
2452 [Adam Langley (Google)]
2454 *) Fix x509_name_ex_d2i memory leak on bad inputs.
2457 *) Add protection against ECDSA timing attacks as mentioned in the paper
2458 by Billy Bob Brumley and Nicola Tuveri, see:
2460 http://eprint.iacr.org/2011/232.pdf
2462 [Billy Bob Brumley and Nicola Tuveri]
2464 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
2466 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
2467 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
2469 *) Fix bug in string printing code: if *any* escaping is enabled we must
2470 escape the escape character (backslash) or the resulting string is
2474 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
2476 *) Disable code workaround for ancient and obsolete Netscape browsers
2477 and servers: an attacker can use it in a ciphersuite downgrade attack.
2478 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
2481 *) Fixed J-PAKE implementation error, originally discovered by
2482 Sebastien Martini, further info and confirmation from Stefan
2483 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
2486 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
2488 *) Fix extension code to avoid race conditions which can result in a buffer
2489 overrun vulnerability: resumed sessions must not be modified as they can
2490 be shared by multiple threads. CVE-2010-3864
2493 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
2496 *) Don't reencode certificate when calculating signature: cache and use
2497 the original encoding instead. This makes signature verification of
2498 some broken encodings work correctly.
2501 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
2502 is also one of the inputs.
2503 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
2505 *) Don't repeatedly append PBE algorithms to table if they already exist.
2506 Sort table on each new add. This effectively makes the table read only
2507 after all algorithms are added and subsequent calls to PKCS12_pbe_add
2511 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
2513 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
2516 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
2517 access or freeing data twice (CVE-2010-0742)
2518 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
2520 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
2521 common in certificates and some applications which only call
2522 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
2526 Reduce copying into .apps and .test in makevms.com
2527 Don't try to use blank CA certificate in CA.com
2528 Allow use of C files from original directories in maketests.com
2529 [Steven M. Schweda" <sms@antinode.info>]
2531 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
2533 *) When rejecting SSL/TLS records due to an incorrect version number, never
2534 update s->server with a new major version number. As of
2535 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
2536 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
2537 the previous behavior could result in a read attempt at NULL when
2538 receiving specific incorrect SSL/TLS records once record payload
2539 protection is active. (CVE-2010-0740)
2540 [Bodo Moeller, Adam Langley <agl@chromium.org>]
2542 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
2543 could be crashed if the relevant tables were not present (e.g. chrooted).
2544 [Tomas Hoger <thoger@redhat.com>]
2546 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
2548 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
2549 [Martin Olsson, Neel Mehta]
2551 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
2552 accommodate for stack sorting, always a write lock!).
2555 *) On some versions of WIN32 Heap32Next is very slow. This can cause
2556 excessive delays in the RAND_poll(): over a minute. As a workaround
2557 include a time check in the inner Heap32Next loop too.
2560 *) The code that handled flushing of data in SSL/TLS originally used the
2561 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
2562 the problem outlined in PR#1949. The fix suggested there however can
2563 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
2564 of Apache). So instead simplify the code to flush unconditionally.
2565 This should be fine since flushing with no data to flush is a no op.
2568 *) Handle TLS versions 2.0 and later properly and correctly use the
2569 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
2570 off ancient servers have a habit of sticking around for a while...
2573 *) Modify compression code so it frees up structures without using the
2574 ex_data callbacks. This works around a problem where some applications
2575 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
2576 restarting) then use compression (e.g. SSL with compression) later.
2577 This results in significant per-connection memory leaks and
2578 has caused some security issues including CVE-2008-1678 and
2582 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
2583 change when encrypting or decrypting.
2586 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
2587 connect and renegotiate with servers which do not support RI.
2588 Until RI is more widely deployed this option is enabled by default.
2591 *) Add "missing" ssl ctrls to clear options and mode.
2594 *) If client attempts to renegotiate and doesn't support RI respond with
2595 a no_renegotiation alert as required by RFC5746. Some renegotiating
2596 TLS clients will continue a connection gracefully when they receive
2597 the alert. Unfortunately OpenSSL mishandled this alert and would hang
2598 waiting for a server hello which it will never receive. Now we treat a
2599 received no_renegotiation alert as a fatal error. This is because
2600 applications requesting a renegotiation might well expect it to succeed
2601 and would have no code in place to handle the server denying it so the
2602 only safe thing to do is to terminate the connection.
2605 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
2606 peer supports secure renegotiation and 0 otherwise. Print out peer
2607 renegotiation support in s_client/s_server.
2610 *) Replace the highly broken and deprecated SPKAC certification method with
2611 the updated NID creation version. This should correctly handle UTF8.
2614 *) Implement RFC5746. Re-enable renegotiation but require the extension
2615 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
2616 turns out to be a bad idea. It has been replaced by
2617 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
2618 SSL_CTX_set_options(). This is really not recommended unless you
2619 know what you are doing.
2620 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
2622 *) Fixes to stateless session resumption handling. Use initial_ctx when
2623 issuing and attempting to decrypt tickets in case it has changed during
2624 servername handling. Use a non-zero length session ID when attempting
2625 stateless session resumption: this makes it possible to determine if
2626 a resumption has occurred immediately after receiving server hello
2627 (several places in OpenSSL subtly assume this) instead of later in
2631 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
2632 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
2633 fixes for a few places where the return code is not checked
2635 [Julia Lawall <julia@diku.dk>]
2637 *) Add --strict-warnings option to Configure script to include devteam
2638 warnings in other configurations.
2641 *) Add support for --libdir option and LIBDIR variable in makefiles. This
2642 makes it possible to install openssl libraries in locations which
2643 have names other than "lib", for example "/usr/lib64" which some
2645 [Steve Henson, based on patch from Jeremy Utley]
2647 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
2648 X690 8.9.12 and can produce some misleading textual output of OIDs.
2649 [Steve Henson, reported by Dan Kaminsky]
2651 *) Delete MD2 from algorithm tables. This follows the recommendation in
2652 several standards that it is not used in new applications due to
2653 several cryptographic weaknesses. For binary compatibility reasons
2654 the MD2 API is still compiled in by default.
2657 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
2661 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
2662 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
2664 [Guenter <lists@gknw.net>]
2666 *) Fix the server certificate chain building code to use X509_verify_cert(),
2667 it used to have an ad-hoc builder which was unable to cope with anything
2668 other than a simple chain.
2669 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
2671 *) Don't check self signed certificate signatures in X509_verify_cert()
2672 by default (a flag can override this): it just wastes time without
2673 adding any security. As a useful side effect self signed root CAs
2674 with non-FIPS digests are now usable in FIPS mode.
2677 *) In dtls1_process_out_of_seq_message() the check if the current message
2678 is already buffered was missing. For every new message was memory
2679 allocated, allowing an attacker to perform an denial of service attack
2680 with sending out of seq handshake messages until there is no memory
2681 left. Additionally every future messege was buffered, even if the
2682 sequence number made no sense and would be part of another handshake.
2683 So only messages with sequence numbers less than 10 in advance will be
2684 buffered. (CVE-2009-1378)
2685 [Robin Seggelmann, discovered by Daniel Mentz]
2687 *) Records are buffered if they arrive with a future epoch to be
2688 processed after finishing the corresponding handshake. There is
2689 currently no limitation to this buffer allowing an attacker to perform
2690 a DOS attack with sending records with future epochs until there is no
2691 memory left. This patch adds the pqueue_size() function to determine
2692 the size of a buffer and limits the record buffer to 100 entries.
2694 [Robin Seggelmann, discovered by Daniel Mentz]
2696 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
2697 parent structure is freed. (CVE-2009-1379)
2700 *) Handle non-blocking I/O properly in SSL_shutdown() call.
2701 [Darryl Miles <darryl-mailinglists@netbauds.net>]
2704 [Ilya O. <vrghost@gmail.com>]
2706 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
2708 *) Disable renegotiation completely - this fixes a severe security
2709 problem (CVE-2009-3555) at the cost of breaking all
2710 renegotiation. Renegotiation can be re-enabled by setting
2711 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
2712 run-time. This is really not recommended unless you know what
2716 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
2718 *) Don't set val to NULL when freeing up structures, it is freed up by
2719 underlying code. If sizeof(void *) > sizeof(long) this can result in
2720 zeroing past the valid field. (CVE-2009-0789)
2721 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
2723 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
2724 checked correctly. This would allow some invalid signed attributes to
2725 appear to verify correctly. (CVE-2009-0591)
2726 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2728 *) Reject UniversalString and BMPString types with invalid lengths. This
2729 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
2730 a legal length. (CVE-2009-0590)
2733 *) Set S/MIME signing as the default purpose rather than setting it
2734 unconditionally. This allows applications to override it at the store
2738 *) Permit restricted recursion of ASN1 strings. This is needed in practice
2739 to handle some structures.
2742 *) Improve efficiency of mem_gets: don't search whole buffer each time
2744 [Jeremy Shapiro <jnshapir@us.ibm.com>]
2746 *) New -hex option for openssl rand.
2749 *) Print out UTF8String and NumericString when parsing ASN1.
2752 *) Support NumericString type for name components.
2755 *) Allow CC in the environment to override the automatically chosen
2756 compiler. Note that nothing is done to ensure flags work with the
2760 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
2762 *) Properly check EVP_VerifyFinal() and similar return values
2764 [Ben Laurie, Bodo Moeller, Google Security Team]
2766 *) Enable TLS extensions by default.
2769 *) Allow the CHIL engine to be loaded, whether the application is
2770 multithreaded or not. (This does not release the developer from the
2771 obligation to set up the dynamic locking callbacks.)
2772 [Sander Temme <sander@temme.net>]
2774 *) Use correct exit code if there is an error in dgst command.
2775 [Steve Henson; problem pointed out by Roland Dirlewanger]
2777 *) Tweak Configure so that you need to say "experimental-jpake" to enable
2778 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
2781 *) Add experimental JPAKE support, including demo authentication in
2782 s_client and s_server.
2785 *) Set the comparison function in v3_addr_canonize().
2786 [Rob Austein <sra@hactrn.net>]
2788 *) Add support for XMPP STARTTLS in s_client.
2789 [Philip Paeps <philip@freebsd.org>]
2791 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
2792 to ensure that even with this option, only ciphersuites in the
2793 server's preference list will be accepted. (Note that the option
2794 applies only when resuming a session, so the earlier behavior was
2795 just about the algorithm choice for symmetric cryptography.)
2798 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
2800 *) Fix NULL pointer dereference if a DTLS server received
2801 ChangeCipherSpec as first record (CVE-2009-1386).
2804 *) Fix a state transition in s3_srvr.c and d1_srvr.c
2805 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
2808 *) The fix in 0.9.8c that supposedly got rid of unsafe
2809 double-checked locking was incomplete for RSA blinding,
2810 addressing just one layer of what turns out to have been
2811 doubly unsafe triple-checked locking.
2813 So now fix this for real by retiring the MONT_HELPER macro
2814 in crypto/rsa/rsa_eay.c.
2816 [Bodo Moeller; problem pointed out by Marius Schilder]
2818 *) Various precautionary measures:
2820 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
2822 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
2823 (NB: This would require knowledge of the secret session ticket key
2824 to exploit, in which case you'd be SOL either way.)
2826 - Change bn_nist.c so that it will properly handle input BIGNUMs
2827 outside the expected range.
2829 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
2832 [Neel Mehta, Bodo Moeller]
2834 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
2835 the load fails. Useful for distros.
2836 [Ben Laurie and the FreeBSD team]
2838 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
2841 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
2844 *) Expand ENGINE to support engine supplied SSL client certificate functions.
2846 This work was sponsored by Logica.
2849 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
2850 keystores. Support for SSL/TLS client authentication too.
2851 Not compiled unless enable-capieng specified to Configure.
2853 This work was sponsored by Logica.
2856 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
2857 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
2858 attribute creation routines such as certifcate requests and PKCS#12
2862 Changes between 0.9.8g and 0.9.8h [28 May 2008]
2864 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
2865 handshake which could lead to a cilent crash as found using the
2866 Codenomicon TLS test suite (CVE-2008-1672)
2867 [Steve Henson, Mark Cox]
2869 *) Fix double free in TLS server name extensions which could lead to
2870 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
2873 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
2875 Clear the error queue to ensure that error entries left from
2876 older function calls do not interfere with the correct operation.
2877 [Lutz Jaenicke, Erik de Castro Lopo]
2879 *) Remove root CA certificates of commercial CAs:
2881 The OpenSSL project does not recommend any specific CA and does not
2882 have any policy with respect to including or excluding any CA.
2883 Therefore it does not make any sense to ship an arbitrary selection
2884 of root CA certificates with the OpenSSL software.
2887 *) RSA OAEP patches to fix two separate invalid memory reads.
2888 The first one involves inputs when 'lzero' is greater than
2889 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
2890 before the beginning of from). The second one involves inputs where
2891 the 'db' section contains nothing but zeroes (there is a one-byte
2892 invalid read after the end of 'db').
2893 [Ivan Nestlerode <inestlerode@us.ibm.com>]
2895 *) Partial backport from 0.9.9-dev:
2897 Introduce bn_mul_mont (dedicated Montgomery multiplication
2898 procedure) as a candidate for BIGNUM assembler implementation.
2899 While 0.9.9-dev uses assembler for various architectures, only
2900 x86_64 is available by default here in the 0.9.8 branch, and
2901 32-bit x86 is available through a compile-time setting.
2903 To try the 32-bit x86 assembler implementation, use Configure
2904 option "enable-montasm" (which exists only for this backport).
2906 As "enable-montasm" for 32-bit x86 disclaims code stability
2907 anyway, in this constellation we activate additional code
2908 backported from 0.9.9-dev for further performance improvements,
2909 namely BN_from_montgomery_word. (To enable this otherwise,
2910 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
2912 [Andy Polyakov (backport partially by Bodo Moeller)]
2914 *) Add TLS session ticket callback. This allows an application to set
2915 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
2916 values. This is useful for key rollover for example where several key
2917 sets may exist with different names.
2920 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
2921 This was broken until now in 0.9.8 releases, such that the only way
2922 a registered ENGINE could be used (assuming it initialises
2923 successfully on the host) was to explicitly set it as the default
2924 for the relevant algorithms. This is in contradiction with 0.9.7
2925 behaviour and the documentation. With this fix, when an ENGINE is
2926 registered into a given algorithm's table of implementations, the
2927 'uptodate' flag is reset so that auto-discovery will be used next
2928 time a new context for that algorithm attempts to select an
2930 [Ian Lister (tweaked by Geoff Thorpe)]
2932 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
2933 implemention in the following ways:
2935 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
2938 Lack of BER streaming support means one pass streaming processing is
2939 only supported if data is detached: setting the streaming flag is
2940 ignored for embedded content.
2942 CMS support is disabled by default and must be explicitly enabled
2943 with the enable-cms configuration option.
2946 *) Update the GMP engine glue to do direct copies between BIGNUM and
2947 mpz_t when openssl and GMP use the same limb size. Otherwise the
2948 existing "conversion via a text string export" trick is still used.
2949 [Paul Sheer <paulsheer@gmail.com>]
2951 *) Zlib compression BIO. This is a filter BIO which compressed and
2952 uncompresses any data passed through it.
2955 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
2956 RFC3394 compatible AES key wrapping.
2959 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
2960 sets string data without copying. X509_ALGOR_set0() and
2961 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
2962 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
2963 from an X509_ATTRIBUTE structure optionally checking it occurs only
2964 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
2968 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
2969 to get the expected BN_FLG_CONSTTIME behavior.
2970 [Bodo Moeller (Google)]
2974 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
2975 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
2976 - added some more tests to do_tests.pl
2977 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
2978 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
2979 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
2980 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
2981 - various changes to netware.pl to enable gcc-cross builds on Win32
2983 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
2984 - various changes to fix missing prototype warnings
2985 - fixed x86nasm.pl to create correct asm files for NASM COFF output
2986 - added AES, WHIRLPOOL and CPUID assembler code to build files
2987 - added missing AES assembler make rules to mk1mf.pl
2988 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
2989 [Guenter Knauf <eflash@gmx.net>]
2991 *) Implement certificate status request TLS extension defined in RFC3546.
2992 A client can set the appropriate parameters and receive the encoded
2993 OCSP response via a callback. A server can query the supplied parameters
2994 and set the encoded OCSP response in the callback. Add simplified examples
2995 to s_client and s_server.
2998 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
3000 *) Fix various bugs:
3001 + Binary incompatibility of ssl_ctx_st structure
3002 + DTLS interoperation with non-compliant servers
3003 + Don't call get_session_cb() without proposed session
3004 + Fix ia64 assembler code
3005 [Andy Polyakov, Steve Henson]
3007 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
3009 *) DTLS Handshake overhaul. There were longstanding issues with
3010 OpenSSL DTLS implementation, which were making it impossible for
3011 RFC 4347 compliant client to communicate with OpenSSL server.
3012 Unfortunately just fixing these incompatibilities would "cut off"
3013 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
3014 server keeps tolerating non RFC compliant syntax. The opposite is
3015 not true, 0.9.8f client can not communicate with earlier server.
3016 This update even addresses CVE-2007-4995.
3019 *) Changes to avoid need for function casts in OpenSSL: some compilers
3020 (gcc 4.2 and later) reject their use.
3021 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
3024 *) Add RFC4507 support to OpenSSL. This includes the corrections in
3025 RFC4507bis. The encrypted ticket format is an encrypted encoded
3026 SSL_SESSION structure, that way new session features are automatically
3029 If a client application caches session in an SSL_SESSION structure
3030 support is transparent because tickets are now stored in the encoded
3033 The SSL_CTX structure automatically generates keys for ticket
3034 protection in servers so again support should be possible
3035 with no application modification.
3037 If a client or server wishes to disable RFC4507 support then the option
3038 SSL_OP_NO_TICKET can be set.
3040 Add a TLS extension debugging callback to allow the contents of any client
3041 or server extensions to be examined.
3043 This work was sponsored by Google.
3046 *) Add initial support for TLS extensions, specifically for the server_name
3047 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
3048 have new members for a host name. The SSL data structure has an
3049 additional member SSL_CTX *initial_ctx so that new sessions can be
3050 stored in that context to allow for session resumption, even after the
3051 SSL has been switched to a new SSL_CTX in reaction to a client's
3052 server_name extension.
3054 New functions (subject to change):
3056 SSL_get_servername()
3057 SSL_get_servername_type()
3060 New CTRL codes and macros (subject to change):
3062 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
3063 - SSL_CTX_set_tlsext_servername_callback()
3064 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
3065 - SSL_CTX_set_tlsext_servername_arg()
3066 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
3068 openssl s_client has a new '-servername ...' option.
3070 openssl s_server has new options '-servername_host ...', '-cert2 ...',
3071 '-key2 ...', '-servername_fatal' (subject to change). This allows
3072 testing the HostName extension for a specific single host name ('-cert'
3073 and '-key' remain fallbacks for handshakes without HostName
3074 negotiation). If the unrecognized_name alert has to be sent, this by
3075 default is a warning; it becomes fatal with the '-servername_fatal'
3078 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
3080 *) Add AES and SSE2 assembly language support to VC++ build.
3083 *) Mitigate attack on final subtraction in Montgomery reduction.
3086 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
3087 (which previously caused an internal error).
3090 *) Squeeze another 10% out of IGE mode when in != out.
3093 *) AES IGE mode speedup.
3094 [Dean Gaudet (Google)]
3096 *) Add the Korean symmetric 128-bit cipher SEED (see
3097 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
3098 add SEED ciphersuites from RFC 4162:
3100 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
3101 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
3102 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
3103 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
3105 To minimize changes between patchlevels in the OpenSSL 0.9.8
3106 series, SEED remains excluded from compilation unless OpenSSL
3107 is configured with 'enable-seed'.
3108 [KISA, Bodo Moeller]
3110 *) Mitigate branch prediction attacks, which can be practical if a
3111 single processor is shared, allowing a spy process to extract
3112 information. For detailed background information, see
3113 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
3114 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
3115 and Necessary Software Countermeasures"). The core of the change
3116 are new versions BN_div_no_branch() and
3117 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
3118 respectively, which are slower, but avoid the security-relevant
3119 conditional branches. These are automatically called by BN_div()
3120 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
3121 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
3122 remove a conditional branch.
3124 BN_FLG_CONSTTIME is the new name for the previous
3125 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
3126 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
3127 in the exponent causes BN_mod_exp_mont() to use the alternative
3128 implementation in BN_mod_exp_mont_consttime().) The old name
3129 remains as a deprecated alias.
3131 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
3132 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
3133 constant-time implementations for more than just exponentiation.
3134 Here too the old name is kept as a deprecated alias.
3136 BN_BLINDING_new() will now use BN_dup() for the modulus so that
3137 the BN_BLINDING structure gets an independent copy of the
3138 modulus. This means that the previous "BIGNUM *m" argument to
3139 BN_BLINDING_new() and to BN_BLINDING_create_param() now
3140 essentially becomes "const BIGNUM *m", although we can't actually
3141 change this in the header file before 0.9.9. It allows
3142 RSA_setup_blinding() to use BN_with_flags() on the modulus to
3143 enable BN_FLG_CONSTTIME.
3145 [Matthew D Wood (Intel Corp)]
3147 *) In the SSL/TLS server implementation, be strict about session ID
3148 context matching (which matters if an application uses a single
3149 external cache for different purposes). Previously,
3150 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
3151 set. This did ensure strict client verification, but meant that,
3152 with applications using a single external cache for quite
3153 different requirements, clients could circumvent ciphersuite
3154 restrictions for a given session ID context by starting a session
3155 in a different context.
3158 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
3159 a ciphersuite string such as "DEFAULT:RSA" cannot enable
3160 authentication-only ciphersuites.
3163 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
3164 not complete and could lead to a possible single byte overflow
3165 (CVE-2007-5135) [Ben Laurie]
3167 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
3169 *) Since AES128 and AES256 (and similarly Camellia128 and
3170 Camellia256) share a single mask bit in the logic of
3171 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
3172 kludge to work properly if AES128 is available and AES256 isn't
3173 (or if Camellia128 is available and Camellia256 isn't).
3176 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
3177 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
3178 When a point or a seed is encoded in a BIT STRING, we need to
3179 prevent the removal of trailing zero bits to get the proper DER
3180 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
3181 of a NamedBitList, for which trailing 0 bits need to be removed.)
3184 *) Have SSL/TLS server implementation tolerate "mismatched" record
3185 protocol version while receiving ClientHello even if the
3186 ClientHello is fragmented. (The server can't insist on the
3187 particular protocol version it has chosen before the ServerHello
3188 message has informed the client about his choice.)
3191 *) Add RFC 3779 support.
3192 [Rob Austein for ARIN, Ben Laurie]
3194 *) Load error codes if they are not already present instead of using a
3195 static variable. This allows them to be cleanly unloaded and reloaded.
3196 Improve header file function name parsing.
3199 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
3200 or CAPABILITY handshake as required by RFCs.
3203 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
3205 *) Introduce limits to prevent malicious keys being able to
3206 cause a denial of service. (CVE-2006-2940)
3207 [Steve Henson, Bodo Moeller]
3209 *) Fix ASN.1 parsing of certain invalid structures that can result
3210 in a denial of service. (CVE-2006-2937) [Steve Henson]
3212 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
3213 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
3215 *) Fix SSL client code which could crash if connecting to a
3216 malicious SSLv2 server. (CVE-2006-4343)
3217 [Tavis Ormandy and Will Drewry, Google Security Team]
3219 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
3220 match only those. Before that, "AES256-SHA" would be interpreted
3221 as a pattern and match "AES128-SHA" too (since AES128-SHA got
3222 the same strength classification in 0.9.7h) as we currently only
3223 have a single AES bit in the ciphersuite description bitmap.
3224 That change, however, also applied to ciphersuite strings such as
3225 "RC4-MD5" that intentionally matched multiple ciphersuites --
3226 namely, SSL 2.0 ciphersuites in addition to the more common ones
3227 from SSL 3.0/TLS 1.0.
3229 So we change the selection algorithm again: Naming an explicit
3230 ciphersuite selects this one ciphersuite, and any other similar
3231 ciphersuite (same bitmap) from *other* protocol versions.
3232 Thus, "RC4-MD5" again will properly select both the SSL 2.0
3233 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
3235 Since SSL 2.0 does not have any ciphersuites for which the
3236 128/256 bit distinction would be relevant, this works for now.
3237 The proper fix will be to use different bits for AES128 and
3238 AES256, which would have avoided the problems from the beginning;
3239 however, bits are scarce, so we can only do this in a new release
3240 (not just a patchlevel) when we can change the SSL_CIPHER
3241 definition to split the single 'unsigned long mask' bitmap into
3242 multiple values to extend the available space.
3246 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
3248 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
3249 (CVE-2006-4339) [Ben Laurie and Google Security Team]
3251 *) Add AES IGE and biIGE modes.
3254 *) Change the Unix randomness entropy gathering to use poll() when
3255 possible instead of select(), since the latter has some
3256 undesirable limitations.
3257 [Darryl Miles via Richard Levitte and Bodo Moeller]
3259 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
3260 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
3261 cannot be implicitly activated as part of, e.g., the "AES" alias.
3262 However, please upgrade to OpenSSL 0.9.9[-dev] for
3263 non-experimental use of the ECC ciphersuites to get TLS extension
3264 support, which is required for curve and point format negotiation
3265 to avoid potential handshake problems.
3268 *) Disable rogue ciphersuites:
3270 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3271 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3272 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3274 The latter two were purportedly from
3275 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3278 Also deactivate the remaining ciphersuites from
3279 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3280 unofficial, and the ID has long expired.
3283 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3284 dual-core machines) and other potential thread-safety issues.
3287 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
3288 versions), which is now available for royalty-free use
3289 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
3290 Also, add Camellia TLS ciphersuites from RFC 4132.
3292 To minimize changes between patchlevels in the OpenSSL 0.9.8
3293 series, Camellia remains excluded from compilation unless OpenSSL
3294 is configured with 'enable-camellia'.
3297 *) Disable the padding bug check when compression is in use. The padding
3298 bug check assumes the first packet is of even length, this is not
3299 necessarily true if compresssion is enabled and can result in false
3300 positives causing handshake failure. The actual bug test is ancient
3301 code so it is hoped that implementations will either have fixed it by
3302 now or any which still have the bug do not support compression.
3305 Changes between 0.9.8a and 0.9.8b [04 May 2006]
3307 *) When applying a cipher rule check to see if string match is an explicit
3308 cipher suite and only match that one cipher suite if it is.
3311 *) Link in manifests for VC++ if needed.
3312 [Austin Ziegler <halostatue@gmail.com>]
3314 *) Update support for ECC-based TLS ciphersuites according to
3315 draft-ietf-tls-ecc-12.txt with proposed changes (but without
3316 TLS extensions, which are supported starting with the 0.9.9
3317 branch, not in the OpenSSL 0.9.8 branch).
3320 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
3321 opaque EVP_CIPHER_CTX handling.
3324 *) Fixes and enhancements to zlib compression code. We now only use
3325 "zlib1.dll" and use the default __cdecl calling convention on Win32
3326 to conform with the standards mentioned here:
3327 http://www.zlib.net/DLL_FAQ.txt
3328 Static zlib linking now works on Windows and the new --with-zlib-include
3329 --with-zlib-lib options to Configure can be used to supply the location
3330 of the headers and library. Gracefully handle case where zlib library
3334 *) Several fixes and enhancements to the OID generation code. The old code
3335 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
3336 handle numbers larger than ULONG_MAX, truncated printing and had a
3337 non standard OBJ_obj2txt() behaviour.
3340 *) Add support for building of engines under engine/ as shared libraries
3341 under VC++ build system.
3344 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
3345 Hopefully, we will not see any false combination of paths any more.
3348 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
3350 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3351 (part of SSL_OP_ALL). This option used to disable the
3352 countermeasure against man-in-the-middle protocol-version
3353 rollback in the SSL 2.0 server implementation, which is a bad
3354 idea. (CVE-2005-2969)
3356 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3357 for Information Security, National Institute of Advanced Industrial
3358 Science and Technology [AIST], Japan)]
3360 *) Add two function to clear and return the verify parameter flags.
3363 *) Keep cipherlists sorted in the source instead of sorting them at
3364 runtime, thus removing the need for a lock.
3367 *) Avoid some small subgroup attacks in Diffie-Hellman.
3368 [Nick Mathewson and Ben Laurie]
3370 *) Add functions for well-known primes.
3373 *) Extended Windows CE support.
3374 [Satoshi Nakamura and Andy Polyakov]
3376 *) Initialize SSL_METHOD structures at compile time instead of during
3377 runtime, thus removing the need for a lock.
3380 *) Make PKCS7_decrypt() work even if no certificate is supplied by
3381 attempting to decrypt each encrypted key in turn. Add support to
3385 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
3387 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
3390 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
3393 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
3394 key into the same file any more.
3397 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
3400 *) Add -utf8 command line and config file option to 'ca'.
3401 [Stefan <stf@udoma.org]
3403 *) Removed the macro des_crypt(), as it seems to conflict with some
3404 libraries. Use DES_crypt().
3407 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
3408 involves renaming the source and generated shared-libs for
3409 both. The engines will accept the corrected or legacy ids
3410 ('ncipher' and '4758_cca' respectively) when binding. NB,
3411 this only applies when building 'shared'.
3412 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
3414 *) Add attribute functions to EVP_PKEY structure. Modify
3415 PKCS12_create() to recognize a CSP name attribute and
3416 use it. Make -CSP option work again in pkcs12 utility.
3419 *) Add new functionality to the bn blinding code:
3420 - automatic re-creation of the BN_BLINDING parameters after
3421 a fixed number of uses (currently 32)
3422 - add new function for parameter creation
3423 - introduce flags to control the update behaviour of the
3424 BN_BLINDING parameters
3425 - hide BN_BLINDING structure
3426 Add a second BN_BLINDING slot to the RSA structure to improve
3427 performance when a single RSA object is shared among several
3431 *) Add support for DTLS.
3432 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
3434 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
3435 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
3438 *) Remove buggy and incomplete DH cert support from
3439 ssl/ssl_rsa.c and ssl/s3_both.c
3442 *) Use SHA-1 instead of MD5 as the default digest algorithm for
3443 the apps/openssl applications.
3446 *) Compile clean with "-Wall -Wmissing-prototypes
3447 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
3448 DEBUG_SAFESTACK must also be set.
3451 *) Change ./Configure so that certain algorithms can be disabled by default.
3452 The new counterpiece to "no-xxx" is "enable-xxx".
3454 The patented RC5 and MDC2 algorithms will now be disabled unless
3455 "enable-rc5" and "enable-mdc2", respectively, are specified.
3457 (IDEA remains enabled despite being patented. This is because IDEA
3458 is frequently required for interoperability, and there is no license
3459 fee for non-commercial use. As before, "no-idea" can be used to
3460 avoid this algorithm.)
3464 *) Add processing of proxy certificates (see RFC 3820). This work was
3465 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
3466 EGEE (Enabling Grids for E-science in Europe).
3469 *) RC4 performance overhaul on modern architectures/implementations, such
3470 as Intel P4, IA-64 and AMD64.
3473 *) New utility extract-section.pl. This can be used specify an alternative
3474 section number in a pod file instead of having to treat each file as
3475 a separate case in Makefile. This can be done by adding two lines to the
3478 =for comment openssl_section:XXX
3480 The blank line is mandatory.
3484 *) New arguments -certform, -keyform and -pass for s_client and s_server
3485 to allow alternative format key and certificate files and passphrase
3489 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
3490 update associated structures and add various utility functions.
3492 Add new policy related verify parameters, include policy checking in
3493 standard verify code. Enhance 'smime' application with extra parameters
3494 to support policy checking and print out.
3497 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
3498 Nehemiah processors. These extensions support AES encryption in hardware
3499 as well as RNG (though RNG support is currently disabled).
3500 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
3502 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
3505 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
3506 [Andy Polyakov and a number of other people]
3508 *) Improved PowerPC platform support. Most notably BIGNUM assembler
3509 implementation contributed by IBM.
3510 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
3512 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
3513 exponent rather than 'unsigned long'. There is a corresponding change to
3514 the new 'rsa_keygen' element of the RSA_METHOD structure.
3515 [Jelte Jansen, Geoff Thorpe]
3517 *) Functionality for creating the initial serial number file is now
3518 moved from CA.pl to the 'ca' utility with a new option -create_serial.
3520 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
3521 number file to 1, which is bound to cause problems. To avoid
3522 the problems while respecting compatibility between different 0.9.7
3523 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
3524 CA.pl for serial number initialization. With the new release 0.9.8,
3525 we can fix the problem directly in the 'ca' utility.)
3528 *) Reduced header interdepencies by declaring more opaque objects in
3529 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
3530 give fewer recursive includes, which could break lazy source code - so
3531 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
3532 developers should define this symbol when building and using openssl to
3533 ensure they track the recommended behaviour, interfaces, [etc], but
3534 backwards-compatible behaviour prevails when this isn't defined.
3537 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
3540 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
3541 This will generate a random key of the appropriate length based on the
3542 cipher context. The EVP_CIPHER can provide its own random key generation
3543 routine to support keys of a specific form. This is used in the des and
3544 3des routines to generate a key of the correct parity. Update S/MIME
3545 code to use new functions and hence generate correct parity DES keys.
3546 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
3547 valid (weak or incorrect parity).
3550 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
3551 as looking them up. This is useful when the verified structure may contain
3552 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
3553 present unless the new PKCS7_NO_CRL flag is asserted.
3556 *) Extend ASN1 oid configuration module. It now additionally accepts the
3559 shortName = some long name, 1.2.3.4
3562 *) Reimplemented the BN_CTX implementation. There is now no more static
3563 limitation on the number of variables it can handle nor the depth of the
3564 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
3565 information can now expand as required, and rather than having a single
3566 static array of bignums, BN_CTX now uses a linked-list of such arrays
3567 allowing it to expand on demand whilst maintaining the usefulness of
3568 BN_CTX's "bundling".
3571 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
3572 to allow all RSA operations to function using a single BN_CTX.
3575 *) Preliminary support for certificate policy evaluation and checking. This
3576 is initially intended to pass the tests outlined in "Conformance Testing
3577 of Relying Party Client Certificate Path Processing Logic" v1.07.
3580 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
3581 remained unused and not that useful. A variety of other little bignum
3582 tweaks and fixes have also been made continuing on from the audit (see
3586 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
3587 associated ASN1, EVP and SSL functions and old ASN1 macros.
3590 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
3591 and this should never fail. So the return value from the use of
3592 BN_set_word() (which can fail due to needless expansion) is now deprecated;
3593 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
3596 *) BN_CTX_get() should return zero-valued bignums, providing the same
3597 initialised value as BN_new().
3598 [Geoff Thorpe, suggested by Ulf Möller]
3600 *) Support for inhibitAnyPolicy certificate extension.
3603 *) An audit of the BIGNUM code is underway, for which debugging code is
3604 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
3605 is considered valid when processing BIGNUMs, and causes execution to
3606 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
3607 further steps are taken to deliberately pollute unused data in BIGNUM
3608 structures to try and expose faulty code further on. For now, openssl will
3609 (in its default mode of operation) continue to tolerate the inconsistent
3610 forms that it has tolerated in the past, but authors and packagers should
3611 consider trying openssl and their own applications when compiled with
3612 these debugging symbols defined. It will help highlight potential bugs in
3613 their own code, and will improve the test coverage for OpenSSL itself. At
3614 some point, these tighter rules will become openssl's default to improve
3615 maintainability, though the assert()s and other overheads will remain only
3616 in debugging configurations. See bn.h for more details.
3617 [Geoff Thorpe, Nils Larsch, Ulf Möller]
3619 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
3620 that can only be obtained through BN_CTX_new() (which implicitly
3621 initialises it). The presence of this function only made it possible
3622 to overwrite an existing structure (and cause memory leaks).
3625 *) Because of the callback-based approach for implementing LHASH as a
3626 template type, lh_insert() adds opaque objects to hash-tables and
3627 lh_doall() or lh_doall_arg() are typically used with a destructor callback
3628 to clean up those corresponding objects before destroying the hash table
3629 (and losing the object pointers). So some over-zealous constifications in
3630 LHASH have been relaxed so that lh_insert() does not take (nor store) the
3631 objects as "const" and the lh_doall[_arg] callback wrappers are not
3632 prototyped to have "const" restrictions on the object pointers they are
3633 given (and so aren't required to cast them away any more).
3636 *) The tmdiff.h API was so ugly and minimal that our own timing utility
3637 (speed) prefers to use its own implementation. The two implementations
3638 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
3639 its object type properly exposed (MS_TM) instead of casting to/from "char
3640 *". This may still change yet if someone realises MS_TM and "ms_time_***"
3641 aren't necessarily the greatest nomenclatures - but this is what was used
3642 internally to the implementation so I've used that for now.
3645 *) Ensure that deprecated functions do not get compiled when
3646 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
3647 the self-tests were still using deprecated key-generation functions so
3648 these have been updated also.
3651 *) Reorganise PKCS#7 code to separate the digest location functionality
3652 into PKCS7_find_digest(), digest addition into PKCS7_bio_add_digest().
3653 New function PKCS7_set_digest() to set the digest type for PKCS#7
3654 digestedData type. Add additional code to correctly generate the
3655 digestedData type and add support for this type in PKCS7 initialization
3659 *) New function PKCS7_set0_type_other() this initializes a PKCS7
3660 structure of type "other".
3663 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
3664 sure the loop does correctly stop and breaking ("division by zero")
3665 modulus operations are not performed. The (pre-generated) prime
3666 table crypto/bn/bn_prime.h was already correct, but it could not be
3667 re-generated on some platforms because of the "division by zero"
3668 situation in the script.
3669 [Ralf S. Engelschall]
3671 *) Update support for ECC-based TLS ciphersuites according to
3672 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
3673 SHA-1 now is only used for "small" curves (where the
3674 representation of a field element takes up to 24 bytes); for
3675 larger curves, the field element resulting from ECDH is directly
3676 used as premaster secret.
3677 [Douglas Stebila (Sun Microsystems Laboratories)]
3679 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
3680 curve secp160r1 to the tests.
3681 [Douglas Stebila (Sun Microsystems Laboratories)]
3683 *) Add the possibility to load symbols globally with DSO.
3684 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
3686 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
3687 control of the error stack.
3690 *) Add support for STORE in ENGINE.
3693 *) Add the STORE type. The intention is to provide a common interface
3694 to certificate and key stores, be they simple file-based stores, or
3695 HSM-type store, or LDAP stores, or...
3696 NOTE: The code is currently UNTESTED and isn't really used anywhere.
3699 *) Add a generic structure called OPENSSL_ITEM. This can be used to
3700 pass a list of arguments to any function as well as provide a way
3701 for a function to pass data back to the caller.
3704 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
3705 works like BUF_strdup() but can be used to duplicate a portion of
3706 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
3710 *) Add the function sk_find_ex() which works like sk_find(), but will
3711 return an index to an element even if an exact match couldn't be
3712 found. The index is guaranteed to point at the element where the
3713 searched-for key would be inserted to preserve sorting order.
3716 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
3717 takes an extra flags argument for optional functionality. Currently,
3718 the following flags are defined:
3720 OBJ_BSEARCH_VALUE_ON_NOMATCH
3721 This one gets OBJ_bsearch_ex() to return a pointer to the first
3722 element where the comparing function returns a negative or zero
3725 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
3726 This one gets OBJ_bsearch_ex() to return a pointer to the first
3727 element where the comparing function returns zero. This is useful
3728 if there are more than one element where the comparing function
3732 *) Make it possible to create self-signed certificates with 'openssl ca'
3733 in such a way that the self-signed certificate becomes part of the
3734 CA database and uses the same mechanisms for serial number generation
3735 as all other certificate signing. The new flag '-selfsign' enables
3736 this functionality. Adapt CA.sh and CA.pl.in.
3739 *) Add functionality to check the public key of a certificate request
3740 against a given private. This is useful to check that a certificate
3741 request can be signed by that key (self-signing).
3744 *) Make it possible to have multiple active certificates with the same
3745 subject in the CA index file. This is done only if the keyword
3746 'unique_subject' is set to 'no' in the main CA section (default
3747 if 'CA_default') of the configuration file. The value is saved
3748 with the database itself in a separate index attribute file,
3749 named like the index file with '.attr' appended to the name.
3752 *) Generate muti valued AVAs using '+' notation in config files for
3756 *) Support for nameConstraints certificate extension.
3759 *) Support for policyConstraints certificate extension.
3762 *) Support for policyMappings certificate extension.
3765 *) Make sure the default DSA_METHOD implementation only uses its
3766 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
3767 and change its own handlers to be NULL so as to remove unnecessary
3768 indirection. This lets alternative implementations fallback to the
3769 default implementation more easily.
3772 *) Support for directoryName in GeneralName related extensions
3776 *) Make it possible to link applications using Makefile.shared.
3777 Make that possible even when linking against static libraries!
3780 *) Support for single pass processing for S/MIME signing. This now
3781 means that S/MIME signing can be done from a pipe, in addition
3782 cleartext signing (multipart/signed type) is effectively streaming
3783 and the signed data does not need to be all held in memory.
3785 This is done with a new flag PKCS7_STREAM. When this flag is set
3786 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
3787 is done after the data is output (and digests calculated) in
3788 SMIME_write_PKCS7().
3791 *) Add full support for -rpath/-R, both in shared libraries and
3792 applications, at least on the platforms where it's known how
3796 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
3797 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
3798 will now compute a table of multiples of the generator that
3799 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
3800 faster (notably in the case of a single point multiplication,
3801 scalar * generator).
3802 [Nils Larsch, Bodo Moeller]
3804 *) IPv6 support for certificate extensions. The various extensions
3805 which use the IP:a.b.c.d can now take IPv6 addresses using the
3806 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
3810 *) Added an ENGINE that implements RSA by performing private key
3811 exponentiations with the GMP library. The conversions to and from
3812 GMP's mpz_t format aren't optimised nor are any montgomery forms
3813 cached, and on x86 it appears OpenSSL's own performance has caught up.
3814 However there are likely to be other architectures where GMP could
3815 provide a boost. This ENGINE is not built in by default, but it can be
3816 specified at Configure time and should be accompanied by the necessary
3817 linker additions, eg;
3818 ./config -DOPENSSL_USE_GMP -lgmp
3821 *) "openssl engine" will not display ENGINE/DSO load failure errors when
3822 testing availability of engines with "-t" - the old behaviour is
3823 produced by increasing the feature's verbosity with "-tt".
3826 *) ECDSA routines: under certain error conditions uninitialized BN objects
3827 could be freed. Solution: make sure initialization is performed early
3828 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
3832 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
3833 and DH_METHOD (eg. by ENGINE implementations) to override the normal
3834 software implementations. For DSA and DH, parameter generation can
3835 also be overriden by providing the appropriate method callbacks.
3838 *) Change the "progress" mechanism used in key-generation and
3839 primality testing to functions that take a new BN_GENCB pointer in
3840 place of callback/argument pairs. The new API functions have "_ex"
3841 postfixes and the older functions are reimplemented as wrappers for
3842 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
3843 declarations of the old functions to help (graceful) attempts to
3844 migrate to the new functions. Also, the new key-generation API
3845 functions operate on a caller-supplied key-structure and return
3846 success/failure rather than returning a key or NULL - this is to
3847 help make "keygen" another member function of RSA_METHOD etc.
3849 Example for using the new callback interface:
3851 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
3855 BN_GENCB_set(&my_cb, my_callback, my_arg);
3857 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
3858 /* For the meaning of a, b in calls to my_callback(), see the
3859 * documentation of the function that calls the callback.
3860 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
3861 * my_callback should return 1 if it wants BN_is_prime_ex()
3862 * to continue, or 0 to stop.
3867 *) Change the ZLIB compression method to be stateful, and make it
3868 available to TLS with the number defined in
3869 draft-ietf-tls-compression-04.txt.
3872 *) Add the ASN.1 structures and functions for CertificatePair, which
3873 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
3875 CertificatePair ::= SEQUENCE {
3876 forward [0] Certificate OPTIONAL,
3877 reverse [1] Certificate OPTIONAL,
3878 -- at least one of the pair shall be present -- }
3880 Also implement the PEM functions to read and write certificate
3881 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
3883 This needed to be defined, mostly for the sake of the LDAP
3884 attribute crossCertificatePair, but may prove useful elsewhere as
3888 *) Make it possible to inhibit symlinking of shared libraries in
3889 Makefile.shared, for Cygwin's sake.
3892 *) Extend the BIGNUM API by creating a function
3893 void BN_set_negative(BIGNUM *a, int neg);
3894 and a macro that behave like
3895 int BN_is_negative(const BIGNUM *a);
3897 to avoid the need to access 'a->neg' directly in applications.
3900 *) Implement fast modular reduction for pseudo-Mersenne primes
3901 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
3902 EC_GROUP_new_curve_GFp() will now automatically use this
3904 [Nils Larsch <nla@trustcenter.de>]
3906 *) Add new lock type (CRYPTO_LOCK_BN).
3909 *) Change the ENGINE framework to automatically load engines
3910 dynamically from specific directories unless they could be
3911 found to already be built in or loaded. Move all the
3912 current engines except for the cryptodev one to a new
3914 The engines in engines/ are built as shared libraries if
3915 the "shared" options was given to ./Configure or ./config.
3916 Otherwise, they are inserted in libcrypto.a.
3917 /usr/local/ssl/engines is the default directory for dynamic
3918 engines, but that can be overriden at configure time through
3919 the usual use of --prefix and/or --openssldir, and at run
3920 time with the environment variable OPENSSL_ENGINES.
3921 [Geoff Thorpe and Richard Levitte]
3923 *) Add Makefile.shared, a helper makefile to build shared
3924 libraries. Adapt Makefile.org.
3927 *) Add version info to Win32 DLLs.
3928 [Peter 'Luna' Runestig" <peter@runestig.com>]
3930 *) Add new 'medium level' PKCS#12 API. Certificates and keys
3931 can be added using this API to created arbitrary PKCS#12
3932 files while avoiding the low level API.
3934 New options to PKCS12_create(), key or cert can be NULL and
3935 will then be omitted from the output file. The encryption
3936 algorithm NIDs can be set to -1 for no encryption, the mac
3937 iteration count can be set to 0 to omit the mac.
3939 Enhance pkcs12 utility by making the -nokeys and -nocerts
3940 options work when creating a PKCS#12 file. New option -nomac
3941 to omit the mac, NONE can be set for an encryption algorithm.
3942 New code is modified to use the enhanced PKCS12_create()
3943 instead of the low level API.
3946 *) Extend ASN1 encoder to support indefinite length constructed
3947 encoding. This can output sequences tags and octet strings in
3948 this form. Modify pk7_asn1.c to support indefinite length
3949 encoding. This is experimental and needs additional code to
3950 be useful, such as an ASN1 bio and some enhanced streaming
3953 Extend template encode functionality so that tagging is passed
3954 down to the template encoder.
3957 *) Let 'openssl req' fail if an argument to '-newkey' is not
3958 recognized instead of using RSA as a default.
3961 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
3962 As these are not official, they are not included in "ALL";
3963 the "ECCdraft" ciphersuite group alias can be used to select them.
3964 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
3966 *) Add ECDH engine support.
3967 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
3969 *) Add ECDH in new directory crypto/ecdh/.
3970 [Douglas Stebila (Sun Microsystems Laboratories)]
3972 *) Let BN_rand_range() abort with an error after 100 iterations
3973 without success (which indicates a broken PRNG).
3976 *) Change BN_mod_sqrt() so that it verifies that the input value
3977 is really the square of the return value. (Previously,
3978 BN_mod_sqrt would show GIGO behaviour.)
3981 *) Add named elliptic curves over binary fields from X9.62, SECG,
3982 and WAP/WTLS; add OIDs that were still missing.
3984 [Sheueling Chang Shantz and Douglas Stebila
3985 (Sun Microsystems Laboratories)]
3987 *) Extend the EC library for elliptic curves over binary fields
3988 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
3991 EC_GF2m_simple_method
3995 EC_GROUP_new_curve_GF2m
3996 EC_GROUP_set_curve_GF2m
3997 EC_GROUP_get_curve_GF2m
3998 EC_POINT_set_affine_coordinates_GF2m
3999 EC_POINT_get_affine_coordinates_GF2m
4000 EC_POINT_set_compressed_coordinates_GF2m
4002 Point compression for binary fields is disabled by default for
4003 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
4006 As binary polynomials are represented as BIGNUMs, various members
4007 of the EC_GROUP and EC_POINT data structures can be shared
4008 between the implementations for prime fields and binary fields;
4009 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
4010 are essentially identical to their ..._GFp counterparts.
4011 (For simplicity, the '..._GFp' prefix has been dropped from
4012 various internal method names.)
4014 An internal 'field_div' method (similar to 'field_mul' and
4015 'field_sqr') has been added; this is used only for binary fields.
4017 [Sheueling Chang Shantz and Douglas Stebila
4018 (Sun Microsystems Laboratories)]
4020 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
4021 through methods ('mul', 'precompute_mult').
4023 The generic implementations (now internally called 'ec_wNAF_mul'
4024 and 'ec_wNAF_precomputed_mult') remain the default if these
4025 methods are undefined.
4027 [Sheueling Chang Shantz and Douglas Stebila
4028 (Sun Microsystems Laboratories)]
4030 *) New function EC_GROUP_get_degree, which is defined through
4031 EC_METHOD. For curves over prime fields, this returns the bit
4032 length of the modulus.
4034 [Sheueling Chang Shantz and Douglas Stebila
4035 (Sun Microsystems Laboratories)]
4037 *) New functions EC_GROUP_dup, EC_POINT_dup.
4038 (These simply call ..._new and ..._copy).
4040 [Sheueling Chang Shantz and Douglas Stebila
4041 (Sun Microsystems Laboratories)]
4043 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
4044 Polynomials are represented as BIGNUMs (where the sign bit is not
4045 used) in the following functions [macros]:
4048 BN_GF2m_sub [= BN_GF2m_add]
4049 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
4050 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
4051 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
4053 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
4054 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
4055 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
4056 BN_GF2m_cmp [= BN_ucmp]
4058 (Note that only the 'mod' functions are actually for fields GF(2^m).
4059 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
4061 For some functions, an the irreducible polynomial defining a
4062 field can be given as an 'unsigned int[]' with strictly
4063 decreasing elements giving the indices of those bits that are set;
4064 i.e., p[] represents the polynomial
4065 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
4067 p[0] > p[1] > ... > p[k] = 0.
4068 This applies to the following functions:
4073 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
4074 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
4076 BN_GF2m_mod_sqrt_arr
4077 BN_GF2m_mod_solve_quad_arr
4081 Conversion can be performed by the following functions:
4086 bntest.c has additional tests for binary polynomial arithmetic.
4088 Two implementations for BN_GF2m_mod_div() are available.
4089 The default algorithm simply uses BN_GF2m_mod_inv() and
4090 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
4091 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
4092 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
4094 [Sheueling Chang Shantz and Douglas Stebila
4095 (Sun Microsystems Laboratories)]
4097 *) Add new error code 'ERR_R_DISABLED' that can be used when some
4098 functionality is disabled at compile-time.
4099 [Douglas Stebila <douglas.stebila@sun.com>]
4101 *) Change default behaviour of 'openssl asn1parse' so that more
4102 information is visible when viewing, e.g., a certificate:
4104 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
4105 mode the content of non-printable OCTET STRINGs is output in a
4106 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
4107 avoid the appearance of a printable string.
4108 [Nils Larsch <nla@trustcenter.de>]
4110 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
4112 EC_GROUP_set_asn1_flag()
4113 EC_GROUP_get_asn1_flag()
4114 EC_GROUP_set_point_conversion_form()
4115 EC_GROUP_get_point_conversion_form()
4116 These control ASN1 encoding details:
4117 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
4118 has been set to OPENSSL_EC_NAMED_CURVE.
4119 - Points are encoded in uncompressed form by default; options for
4120 asn1_for are as for point2oct, namely
4121 POINT_CONVERSION_COMPRESSED
4122 POINT_CONVERSION_UNCOMPRESSED
4123 POINT_CONVERSION_HYBRID
4125 Also add 'seed' and 'seed_len' members to EC_GROUP with access
4128 EC_GROUP_get0_seed()
4129 EC_GROUP_get_seed_len()
4130 This is used only for ASN1 purposes (so far).
4131 [Nils Larsch <nla@trustcenter.de>]
4133 *) Add 'field_type' member to EC_METHOD, which holds the NID
4134 of the appropriate field type OID. The new function
4135 EC_METHOD_get_field_type() returns this value.
4136 [Nils Larsch <nla@trustcenter.de>]
4141 EC_POINT_point2hex()
4142 EC_POINT_hex2point()
4143 providing useful interfaces to EC_POINT_point2oct() and
4144 EC_POINT_oct2point().
4145 [Nils Larsch <nla@trustcenter.de>]
4147 *) Change internals of the EC library so that the functions
4148 EC_GROUP_set_generator()
4149 EC_GROUP_get_generator()
4150 EC_GROUP_get_order()
4151 EC_GROUP_get_cofactor()
4152 are implemented directly in crypto/ec/ec_lib.c and not dispatched
4153 to methods, which would lead to unnecessary code duplication when
4154 adding different types of curves.
4155 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
4157 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
4158 arithmetic, and such that modified wNAFs are generated
4159 (which avoid length expansion in many cases).
4162 *) Add a function EC_GROUP_check_discriminant() (defined via
4163 EC_METHOD) that verifies that the curve discriminant is non-zero.
4165 Add a function EC_GROUP_check() that makes some sanity tests
4166 on a EC_GROUP, its generator and order. This includes
4167 EC_GROUP_check_discriminant().
4168 [Nils Larsch <nla@trustcenter.de>]
4170 *) Add ECDSA in new directory crypto/ecdsa/.
4172 Add applications 'openssl ecparam' and 'openssl ecdsa'
4173 (these are based on 'openssl dsaparam' and 'openssl dsa').
4175 ECDSA support is also included in various other files across the
4176 library. Most notably,
4177 - 'openssl req' now has a '-newkey ecdsa:file' option;
4178 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
4179 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
4180 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
4181 them suitable for ECDSA where domain parameters must be
4182 extracted before the specific public key;
4183 - ECDSA engine support has been added.
4184 [Nils Larsch <nla@trustcenter.de>]
4186 *) Include some named elliptic curves, and add OIDs from X9.62,
4187 SECG, and WAP/WTLS. Each curve can be obtained from the new
4189 EC_GROUP_new_by_curve_name(),
4190 and the list of available named curves can be obtained with
4191 EC_get_builtin_curves().
4192 Also add a 'curve_name' member to EC_GROUP objects, which can be
4194 EC_GROUP_set_curve_name()
4195 EC_GROUP_get_curve_name()
4196 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
4198 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
4199 was actually never needed) and in BN_mul(). The removal in BN_mul()
4200 required a small change in bn_mul_part_recursive() and the addition
4201 of the functions bn_cmp_part_words(), bn_sub_part_words() and
4202 bn_add_part_words(), which do the same thing as bn_cmp_words(),
4203 bn_sub_words() and bn_add_words() except they take arrays with
4207 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
4209 *) Cleanse PEM buffers before freeing them since they may contain
4211 [Benjamin Bennett <ben@psc.edu>]
4213 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
4214 a ciphersuite string such as "DEFAULT:RSA" cannot enable
4215 authentication-only ciphersuites.
4218 *) Since AES128 and AES256 share a single mask bit in the logic of
4219 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
4220 kludge to work properly if AES128 is available and AES256 isn't.
4223 *) Expand security boundary to match 1.1.1 module.
4226 *) Remove redundant features: hash file source, editing of test vectors
4227 modify fipsld to use external fips_premain.c signature.
4230 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
4231 run algorithm test programs.
4234 *) Make algorithm test programs more tolerant of whitespace.
4237 *) Have SSL/TLS server implementation tolerate "mismatched" record
4238 protocol version while receiving ClientHello even if the
4239 ClientHello is fragmented. (The server can't insist on the
4240 particular protocol version it has chosen before the ServerHello
4241 message has informed the client about his choice.)
4244 *) Load error codes if they are not already present instead of using a
4245 static variable. This allows them to be cleanly unloaded and reloaded.
4248 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
4250 *) Introduce limits to prevent malicious keys being able to
4251 cause a denial of service. (CVE-2006-2940)
4252 [Steve Henson, Bodo Moeller]
4254 *) Fix ASN.1 parsing of certain invalid structures that can result
4255 in a denial of service. (CVE-2006-2937) [Steve Henson]
4257 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
4258 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
4260 *) Fix SSL client code which could crash if connecting to a
4261 malicious SSLv2 server. (CVE-2006-4343)
4262 [Tavis Ormandy and Will Drewry, Google Security Team]
4264 *) Change ciphersuite string processing so that an explicit
4265 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
4266 will no longer include "AES128-SHA"), and any other similar
4267 ciphersuite (same bitmap) from *other* protocol versions (so that
4268 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
4269 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
4270 changes from 0.9.8b and 0.9.8d.
4273 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
4275 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
4276 (CVE-2006-4339) [Ben Laurie and Google Security Team]
4278 *) Change the Unix randomness entropy gathering to use poll() when
4279 possible instead of select(), since the latter has some
4280 undesirable limitations.
4281 [Darryl Miles via Richard Levitte and Bodo Moeller]
4283 *) Disable rogue ciphersuites:
4285 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
4286 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
4287 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
4289 The latter two were purportedly from
4290 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
4293 Also deactive the remaining ciphersuites from
4294 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
4295 unofficial, and the ID has long expired.
4298 *) Fix RSA blinding Heisenbug (problems sometimes occured on
4299 dual-core machines) and other potential thread-safety issues.
4302 Changes between 0.9.7i and 0.9.7j [04 May 2006]
4304 *) Adapt fipsld and the build system to link against the validated FIPS
4305 module in FIPS mode.
4308 *) Fixes for VC++ 2005 build under Windows.
4311 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
4312 from a Windows bash shell such as MSYS. It is autodetected from the
4313 "config" script when run from a VC++ environment. Modify standard VC++
4314 build to use fipscanister.o from the GNU make build.
4317 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
4319 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
4320 The value now differs depending on if you build for FIPS or not.
4321 BEWARE! A program linked with a shared FIPSed libcrypto can't be
4322 safely run with a non-FIPSed libcrypto, as it may crash because of
4323 the difference induced by this change.
4326 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
4328 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
4329 (part of SSL_OP_ALL). This option used to disable the
4330 countermeasure against man-in-the-middle protocol-version
4331 rollback in the SSL 2.0 server implementation, which is a bad
4332 idea. (CVE-2005-2969)
4334 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
4335 for Information Security, National Institute of Advanced Industrial
4336 Science and Technology [AIST], Japan)]
4338 *) Minimal support for X9.31 signatures and PSS padding modes. This is
4339 mainly for FIPS compliance and not fully integrated at this stage.
4342 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
4343 the exponentiation using a fixed-length exponent. (Otherwise,
4344 the information leaked through timing could expose the secret key
4345 after many signatures; cf. Bleichenbacher's attack on DSA with
4349 *) Make a new fixed-window mod_exp implementation the default for
4350 RSA, DSA, and DH private-key operations so that the sequence of
4351 squares and multiplies and the memory access pattern are
4352 independent of the particular secret key. This will mitigate
4353 cache-timing and potential related attacks.
4355 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
4356 and this is automatically used by BN_mod_exp_mont() if the new flag
4357 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
4358 will use this BN flag for private exponents unless the flag
4359 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
4360 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
4362 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
4364 *) Change the client implementation for SSLv23_method() and
4365 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
4366 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
4367 (Previously, the SSL 2.0 backwards compatible Client Hello
4368 message format would be used even with SSL_OP_NO_SSLv2.)
4371 *) Add support for smime-type MIME parameter in S/MIME messages which some
4375 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
4376 a threadsafe manner. Modify rsa code to use new function and add calls
4377 to dsa and dh code (which had race conditions before).
4380 *) Include the fixed error library code in the C error file definitions
4381 instead of fixing them up at runtime. This keeps the error code
4382 structures constant.
4385 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
4387 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
4390 *) Fixes for newer kerberos headers. NB: the casts are needed because
4391 the 'length' field is signed on one version and unsigned on another
4392 with no (?) obvious way to tell the difference, without these VC++
4393 complains. Also the "definition" of FAR (blank) is no longer included
4394 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
4395 some needed definitions.
4398 *) Undo Cygwin change.
4401 *) Added support for proxy certificates according to RFC 3820.
4402 Because they may be a security thread to unaware applications,
4403 they must be explicitely allowed in run-time. See
4404 docs/HOWTO/proxy_certificates.txt for further information.
4407 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
4409 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
4410 server and client random values. Previously
4411 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
4412 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
4414 This change has negligible security impact because:
4416 1. Server and client random values still have 24 bytes of pseudo random
4419 2. Server and client random values are sent in the clear in the initial
4422 3. The master secret is derived using the premaster secret (48 bytes in
4423 size for static RSA ciphersuites) as well as client server and random
4426 The OpenSSL team would like to thank the UK NISCC for bringing this issue
4429 [Stephen Henson, reported by UK NISCC]
4431 *) Use Windows randomness collection on Cygwin.
4434 *) Fix hang in EGD/PRNGD query when communication socket is closed
4435 prematurely by EGD/PRNGD.
4436 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
4438 *) Prompt for pass phrases when appropriate for PKCS12 input format.
projects / openssl.git / blob