5 Changes between 1.0.1 and 1.1.0 [xx XXX xxxx]
7 *) Initial TLS v1.2 support. Add new SHA256 digest to ssl code, switch
8 to SHA256 for PRF when using TLS v1.2 and later. Add new SHA256 based
9 ciphersuites. At present only RSA key exchange ciphersuites work with
10 TLS v1.2. Add new option for TLS v1.2 replacing the old and obsolete
11 SSL_OP_PKCS1_CHECK flags with SSL_OP_NO_TLSv1_2. New TLSv1.2 methods
15 *) New option OPENSSL_NO_SSL_INTERN. If an application can be compiled
16 with this defined it will not be affected by any changes to ssl internal
17 structures. Add several utility functions to allow openssl application
18 to work with OPENSSL_NO_SSL_INTERN defined.
21 *) Minor change to DRBG entropy callback semantics. In some cases
22 there is no mutiple of the block length between min_len and
23 max_len. Allow the callback to return more than max_len bytes
24 of entropy but discard any extra: it is the callback's responsibility
25 to ensure that the extra data discarded does not impact the
26 requested amount of entropy.
29 *) Add PRNG security strength checks to RSA, DSA and ECDSA using
30 information in FIPS186-3, SP800-57 and SP800-131A.
33 *) CCM support via EVP. Interface is very similar to GCM case except we
34 must supply all data in one chunk (i.e. no update, final) and the
35 message length must be supplied if AAD is used. Add algorithm test
39 *) Initial version of POST overhaul. Add POST callback to allow the status
40 of POST to be monitored and/or failures induced. Modify fips_test_suite
41 to use callback. Always run all selftests even if one fails.
44 *) XTS support including algorithm test driver in the fips_gcmtest program.
45 Note: this does increase the maximum key length from 32 to 64 bytes but
46 there should be no binary compatibility issues as existing applications
47 will never use XTS mode.
50 *) Extensive reorganisation of FIPS PRNG behaviour. Remove all dependencies
51 to OpenSSL RAND code and replace with a tiny FIPS RAND API which also
52 performs algorithm blocking for unapproved PRNG types. Also do not
53 set PRNG type in FIPS_mode_set(): leave this to the application.
54 Add default OpenSSL DRBG handling: sets up FIPS PRNG and seeds with
55 the standard OpenSSL PRNG: set additional data to a date time vector.
58 *) Rename old X9.31 PRNG functions of the form FIPS_rand* to FIPS_x931*.
59 This shouldn't present any incompatibility problems because applications
60 shouldn't be using these directly and any that are will need to rethink
61 anyway as the X9.31 PRNG is now deprecated by FIPS 140-2
64 *) Extensive self tests and health checking required by SP800-90 DRBG.
65 Remove strength parameter from FIPS_drbg_instantiate and always
66 instantiate at maximum supported strength.
70 [Tom Wu <tjw@cs.stanford.edu> and Ben Laurie]
72 *) Add ECDH code to fips module and fips_ecdhvs for primitives only testing.
75 *) New algorithm test program fips_dhvs to handle DH primitives only testing.
78 *) New function DH_compute_key_padded() to compute a DH key and pad with
79 leading zeroes if needed: this complies with SP800-56A et al.
82 *) Initial implementation of SP800-90 DRBGs for Hash and CTR. Not used by
83 anything, incomplete, subject to change and largely untested at present.
86 *) Modify fipscanisteronly build option to only build the necessary object
87 files by filtering FIPS_EX_OBJ through a perl script in crypto/Makefile.
90 *) Add experimental option FIPSSYMS to give all symbols in
91 fipscanister.o and FIPS or fips prefix. This will avoid
92 conflicts with future versions of OpenSSL. Add perl script
93 util/fipsas.pl to preprocess assembly language source files
94 and rename any affected symbols.
97 *) Add selftest checks and algorithm block of non-fips algorithms in
98 FIPS mode. Remove DES2 from selftests.
101 *) Add ECDSA code to fips module. Add tiny fips_ecdsa_check to just
102 return internal method without any ENGINE dependencies. Add new
103 tiny fips sign and verify functions.
106 *) New build option no-ec2m to disable characteristic 2 code.
109 *) New build option "fipscanisteronly". This only builds fipscanister.o
110 and (currently) associated fips utilities. Uses the file Makefile.fips
111 instead of Makefile.org as the prototype.
114 *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
115 Update fips_gcmtest to use IV generator.
118 *) Initial, experimental EVP support for AES-GCM. AAD can be input by
119 setting output buffer to NULL. The *Final function must be
120 called although it will not retrieve any additional data. The tag
121 can be set or retrieved with a ctrl. The IV length is by default 12
122 bytes (96 bits) but can be set to an alternative value. If the IV
123 length exceeds the maximum IV length (currently 16 bytes) it cannot be
127 *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
128 underlying do_cipher function handles all cipher semantics itself
129 including padding and finalisation. This is useful if (for example)
130 an ENGINE cipher handles block padding itself. The behaviour of
131 do_cipher is subtly changed if this flag is set: the return value
132 is the number of characters written to the output buffer (zero is
133 no longer an error code) or a negative error code. Also if the
134 input buffer is NULL and length 0 finalisation should be performed.
137 *) If a candidate issuer certificate is already part of the constructed
138 path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
141 *) Improve forward-security support: add functions
143 void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
144 void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
146 for use by SSL/TLS servers; the callback function will be called whenever a
147 new session is created, and gets to decide whether the session may be
148 cached to make it resumable (return 0) or not (return 1). (As by the
149 SSL/TLS protocol specifications, the session_id sent by the server will be
150 empty to indicate that the session is not resumable; also, the server will
151 not generate RFC 4507 (RFC 5077) session tickets.)
153 A simple reasonable callback implementation is to return is_forward_secure.
154 This parameter will be set to 1 or 0 depending on the ciphersuite selected
155 by the SSL/TLS server library, indicating whether it can provide forward
157 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
159 *) Add Next Protocol Negotiation,
160 http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
161 disabled with a no-npn flag to config or Configure. Code donated
163 [Adam Langley <agl@google.com> and Ben Laurie]
165 *) Use type ossl_ssize_t instad of ssize_t which isn't available on
166 all platforms. Move ssize_t definition from e_os.h to the public
167 header file e_os2.h as it now appears in public header file cms.h
170 *) New function OPENSSL_gmtime_diff to find the difference in days
171 and seconds between two tm structures. This will be used to provide
172 additional functionality for ASN1_TIME.
175 *) New -sigopt option to the ca, req and x509 utilities. Additional
176 signature parameters can be passed using this option and in
180 *) Add RSA PSS signing function. This will generate and set the
181 appropriate AlgorithmIdentifiers for PSS based on those in the
182 corresponding EVP_MD_CTX structure. No application support yet.
185 *) Support for companion algorithm specific ASN1 signing routines.
186 New function ASN1_item_sign_ctx() signs a pre-initialised
187 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
188 the appropriate parameters.
191 *) Add new algorithm specific ASN1 verification initialisation function
192 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
193 handling will be the same no matter what EVP_PKEY_METHOD is used.
194 Add a PSS handler to support verification of PSS signatures: checked
195 against a number of sample certificates.
198 *) Add signature printing for PSS. Add PSS OIDs.
199 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
201 *) Add algorithm specific signature printing. An individual ASN1 method
202 can now print out signatures instead of the standard hex dump.
204 More complex signatures (e.g. PSS) can print out more meaningful
205 information. Include DSA version that prints out the signature
209 *) Add -trusted_first option which attempts to find certificates in the
210 trusted store even if an untrusted chain is also supplied.
213 *) Initial experimental support for explicitly trusted non-root CAs.
214 OpenSSL still tries to build a complete chain to a root but if an
215 intermediate CA has a trust setting included that is used. The first
216 setting is used: whether to trust or reject.
219 *) New -verify_name option in command line utilities to set verification
223 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
224 Add CMAC pkey methods.
227 *) Experiemental regnegotiation in s_server -www mode. If the client
228 browses /reneg connection is renegotiated. If /renegcert it is
229 renegotiated requesting a certificate.
232 *) Add an "external" session cache for debugging purposes to s_server. This
233 should help trace issues which normally are only apparent in deployed
234 multi-process servers.
237 *) Experiemental password based recipient info support for CMS library:
238 implementing RFC3211.
241 *) Split password based encryption into PBES2 and PBKDF2 functions. This
242 neatly separates the code into cipher and PBE sections and is required
243 for some algorithms that split PBES2 into separate pieces (such as
247 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
248 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
249 BIO_set_cipher() and some obscure PEM functions were changed so they
250 can now return an error. The RAND changes required a change to the
251 RAND_METHOD structure.
254 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
255 a gcc attribute to warn if the result of a function is ignored. This
256 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
257 whose return value is often ignored.
260 Changes between 1.0.0d and 1.0.1 [xx XXX xxxx]
262 *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
265 *) Add EC_GFp_nistp224_method(), a 64-bit optimized implementation for
266 elliptic curve NIST-P224 with constant-time single point multiplication on
267 typical inputs. EC_GROUP_new_by_curve_name() will automatically use this
268 (while EC_GROUP_new_curve_GFp() currently won't and prefers the more
269 flexible implementations).
271 The implementation requires support for the nonstandard type __uint128_t,
272 and so is disabled by default. To include this in your build of OpenSSL,
273 use -DEC_NISTP224_64_GCC_128 on the Configure (or config) command line,
274 and run "make depend" (or "make update").
275 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
277 *) Permit abbreviated handshakes when renegotiating using the function
278 SSL_renegotiate_abbreviated().
279 [Robin Seggelmann <seggelmann@fh-muenster.de>]
281 *) Add call to ENGINE_register_all_complete() to
282 ENGINE_load_builtin_engines(), so some implementations get used
283 automatically instead of needing explicit application support.
286 *) Add support for TLS key exporter as described in RFC5705.
287 [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
289 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
290 a few changes are required:
292 Add SSL_OP_NO_TLSv1_1 flag.
294 Update version checking logic to handle version 1.1.
295 Add explicit IV handling (ported from DTLS code).
296 Add command line options to s_client/s_server.
299 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
301 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
302 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
304 *) Fix bug in string printing code: if *any* escaping is enabled we must
305 escape the escape character (backslash) or the resulting string is
309 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
311 *) Disable code workaround for ancient and obsolete Netscape browsers
312 and servers: an attacker can use it in a ciphersuite downgrade attack.
313 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
316 *) Fixed J-PAKE implementation error, originally discovered by
317 Sebastien Martini, further info and confirmation from Stefan
318 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
321 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
323 *) Fix extension code to avoid race conditions which can result in a buffer
324 overrun vulnerability: resumed sessions must not be modified as they can
325 be shared by multiple threads. CVE-2010-3864
328 *) Fix WIN32 build system to correctly link an ENGINE directory into
332 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
334 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
336 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
338 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
340 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
341 context. The operation can be customised via the ctrl mechanism in
342 case ENGINEs want to include additional functionality.
345 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
348 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
349 output hashes compatible with older versions of OpenSSL.
350 [Willy Weisz <weisz@vcpc.univie.ac.at>]
352 *) Fix compression algorithm handling: if resuming a session use the
353 compression algorithm of the resumed session instead of determining
354 it from client hello again. Don't allow server to change algorithm.
357 *) Add load_crls() function to apps tidying load_certs() too. Add option
358 to verify utility to allow additional CRLs to be included.
361 *) Update OCSP request code to permit adding custom headers to the request:
362 some responders need this.
365 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
367 [Julia Lawall <julia@diku.dk>]
369 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
370 needlessly dereferenced structures, used obsolete functions and
371 didn't handle all updated verify codes correctly.
374 *) Disable MD2 in the default configuration.
377 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
378 indicate the initial BIO being pushed or popped. This makes it possible
379 to determine whether the BIO is the one explicitly called or as a result
380 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
381 it handles reference counts correctly and doesn't zero out the I/O bio
382 when it is not being explicitly popped. WARNING: applications which
383 included workarounds for the old buggy behaviour will need to be modified
384 or they could free up already freed BIOs.
387 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
388 renaming to all platforms (within the 0.9.8 branch, this was
389 done conditionally on Netware platforms to avoid a name clash).
390 [Guenter <lists@gknw.net>]
392 *) Add ECDHE and PSK support to DTLS.
393 [Michael Tuexen <tuexen@fh-muenster.de>]
395 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
399 *) Add "missing" function EVP_MD_flags() (without this the only way to
400 retrieve a digest flags is by accessing the structure directly. Update
401 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
402 or cipher is registered as in the "from" argument. Print out all
403 registered digests in the dgst usage message instead of manually
404 attempting to work them out.
407 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
408 this allows the use of compression and extensions. Change default cipher
409 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
410 by default unless an application cipher string requests it.
413 *) Alter match criteria in PKCS12_parse(). It used to try to use local
414 key ids to find matching certificates and keys but some PKCS#12 files
415 don't follow the (somewhat unwritten) rules and this strategy fails.
416 Now just gather all certificates together and the first private key
417 then look for the first certificate that matches the key.
420 *) Support use of registered digest and cipher names for dgst and cipher
421 commands instead of having to add each one as a special case. So now
428 openssl dgst -sha256 foo
430 and this works for ENGINE based algorithms too.
434 *) Update Gost ENGINE to support parameter files.
435 [Victor B. Wagner <vitus@cryptocom.ru>]
437 *) Support GeneralizedTime in ca utility.
438 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
440 *) Enhance the hash format used for certificate directory links. The new
441 form uses the canonical encoding (meaning equivalent names will work
442 even if they aren't identical) and uses SHA1 instead of MD5. This form
443 is incompatible with the older format and as a result c_rehash should
444 be used to rebuild symbolic links.
447 *) Make PKCS#8 the default write format for private keys, replacing the
448 traditional format. This form is standardised, more secure and doesn't
449 include an implicit MD5 dependency.
452 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
453 committed to OpenSSL should pass this lot as a minimum.
456 *) Add session ticket override functionality for use by EAP-FAST.
457 [Jouni Malinen <j@w1.fi>]
459 *) Modify HMAC functions to return a value. Since these can be implemented
460 in an ENGINE errors can occur.
463 *) Type-checked OBJ_bsearch_ex.
466 *) Type-checked OBJ_bsearch. Also some constification necessitated
467 by type-checking. Still to come: TXT_DB, bsearch(?),
468 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
472 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
473 seconds to a tm structure directly, instead of going through OS
474 specific date routines. This avoids any issues with OS routines such
475 as the year 2038 bug. New *_adj() functions for ASN1 time structures
476 and X509_time_adj_ex() to cover the extended range. The existing
477 X509_time_adj() is still usable and will no longer have any date issues.
480 *) Delta CRL support. New use deltas option which will attempt to locate
481 and search any appropriate delta CRLs available.
483 This work was sponsored by Google.
486 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
487 code and add additional score elements. Validate alternate CRL paths
488 as part of the CRL checking and indicate a new error "CRL path validation
489 error" in this case. Applications wanting additional details can use
490 the verify callback and check the new "parent" field. If this is not
491 NULL CRL path validation is taking place. Existing applications wont
492 see this because it requires extended CRL support which is off by
495 This work was sponsored by Google.
498 *) Support for freshest CRL extension.
500 This work was sponsored by Google.
503 *) Initial indirect CRL support. Currently only supported in the CRLs
504 passed directly and not via lookup. Process certificate issuer
505 CRL entry extension and lookup CRL entries by bother issuer name
506 and serial number. Check and process CRL issuer entry in IDP extension.
508 This work was sponsored by Google.
511 *) Add support for distinct certificate and CRL paths. The CRL issuer
512 certificate is validated separately in this case. Only enabled if
513 an extended CRL support flag is set: this flag will enable additional
514 CRL functionality in future.
516 This work was sponsored by Google.
519 *) Add support for policy mappings extension.
521 This work was sponsored by Google.
524 *) Fixes to pathlength constraint, self issued certificate handling,
525 policy processing to align with RFC3280 and PKITS tests.
527 This work was sponsored by Google.
530 *) Support for name constraints certificate extension. DN, email, DNS
531 and URI types are currently supported.
533 This work was sponsored by Google.
536 *) To cater for systems that provide a pointer-based thread ID rather
537 than numeric, deprecate the current numeric thread ID mechanism and
538 replace it with a structure and associated callback type. This
539 mechanism allows a numeric "hash" to be extracted from a thread ID in
540 either case, and on platforms where pointers are larger than 'long',
541 mixing is done to help ensure the numeric 'hash' is usable even if it
542 can't be guaranteed unique. The default mechanism is to use "&errno"
543 as a pointer-based thread ID to distinguish between threads.
545 Applications that want to provide their own thread IDs should now use
546 CRYPTO_THREADID_set_callback() to register a callback that will call
547 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
549 Note that ERR_remove_state() is now deprecated, because it is tied
550 to the assumption that thread IDs are numeric. ERR_remove_state(0)
551 to free the current thread's error state should be replaced by
552 ERR_remove_thread_state(NULL).
554 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
555 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
556 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
557 application was previously providing a numeric thread callback that
558 was inappropriate for distinguishing threads, then uniqueness might
559 have been obtained with &errno that happened immediately in the
560 intermediate development versions of OpenSSL; this is no longer the
561 case, the numeric thread callback will now override the automatic use
563 [Geoff Thorpe, with help from Bodo Moeller]
565 *) Initial support for different CRL issuing certificates. This covers a
566 simple case where the self issued certificates in the chain exist and
567 the real CRL issuer is higher in the existing chain.
569 This work was sponsored by Google.
572 *) Removed effectively defunct crypto/store from the build.
575 *) Revamp of STACK to provide stronger type-checking. Still to come:
576 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
577 ASN1_STRING, CONF_VALUE.
580 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
581 RAM on SSL connections. This option can save about 34k per idle SSL.
584 *) Revamp of LHASH to provide stronger type-checking. Still to come:
585 STACK, TXT_DB, bsearch, qsort.
588 *) Initial support for Cryptographic Message Syntax (aka CMS) based
589 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
590 support for data, signedData, compressedData, digestedData and
591 encryptedData, envelopedData types included. Scripts to check against
592 RFC4134 examples draft and interop and consistency checks of many
593 content types and variants.
596 *) Add options to enc utility to support use of zlib compression BIO.
599 *) Extend mk1mf to support importing of options and assembly language
600 files from Configure script, currently only included in VC-WIN32.
601 The assembly language rules can now optionally generate the source
602 files from the associated perl scripts.
605 *) Implement remaining functionality needed to support GOST ciphersuites.
606 Interop testing has been performed using CryptoPro implementations.
607 [Victor B. Wagner <vitus@cryptocom.ru>]
609 *) s390x assembler pack.
612 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
616 *) Implement Opaque PRF Input TLS extension as specified in
617 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
618 official specification yet and no extension type assignment by
619 IANA exists, this extension (for now) will have to be explicitly
620 enabled when building OpenSSL by providing the extension number
621 to use. For example, specify an option
623 -DTLSEXT_TYPE_opaque_prf_input=0x9527
625 to the "config" or "Configure" script to enable the extension,
626 assuming extension number 0x9527 (which is a completely arbitrary
627 and unofficial assignment based on the MD5 hash of the Internet
628 Draft). Note that by doing so, you potentially lose
629 interoperability with other TLS implementations since these might
630 be using the same extension number for other purposes.
632 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
633 opaque PRF input value to use in the handshake. This will create
634 an interal copy of the length-'len' string at 'src', and will
635 return non-zero for success.
637 To get more control and flexibility, provide a callback function
640 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
641 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
645 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
648 Callback function 'cb' will be called in handshakes, and is
649 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
650 Argument 'arg' is for application purposes (the value as given to
651 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
652 be provided to the callback function). The callback function
653 has to return non-zero to report success: usually 1 to use opaque
654 PRF input just if possible, or 2 to enforce use of the opaque PRF
655 input. In the latter case, the library will abort the handshake
656 if opaque PRF input is not successfully negotiated.
658 Arguments 'peerinput' and 'len' given to the callback function
659 will always be NULL and 0 in the case of a client. A server will
660 see the client's opaque PRF input through these variables if
661 available (NULL and 0 otherwise). Note that if the server
662 provides an opaque PRF input, the length must be the same as the
663 length of the client's opaque PRF input.
665 Note that the callback function will only be called when creating
666 a new session (session resumption can resume whatever was
667 previously negotiated), and will not be called in SSL 2.0
668 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
669 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
670 for applications that need to enforce opaque PRF input.
674 *) Update ssl code to support digests other than SHA1+MD5 for handshake
677 [Victor B. Wagner <vitus@cryptocom.ru>]
679 *) Add RFC4507 support to OpenSSL. This includes the corrections in
680 RFC4507bis. The encrypted ticket format is an encrypted encoded
681 SSL_SESSION structure, that way new session features are automatically
684 If a client application caches session in an SSL_SESSION structure
685 support is transparent because tickets are now stored in the encoded
688 The SSL_CTX structure automatically generates keys for ticket
689 protection in servers so again support should be possible
690 with no application modification.
692 If a client or server wishes to disable RFC4507 support then the option
693 SSL_OP_NO_TICKET can be set.
695 Add a TLS extension debugging callback to allow the contents of any client
696 or server extensions to be examined.
698 This work was sponsored by Google.
701 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
702 OpenSSL should now compile cleanly on gcc 4.2
703 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
705 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
706 support including streaming MAC support: this is required for GOST
708 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
710 *) Add option -stream to use PKCS#7 streaming in smime utility. New
711 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
712 to output in BER and PEM format.
715 *) Experimental support for use of HMAC via EVP_PKEY interface. This
716 allows HMAC to be handled via the EVP_DigestSign*() interface. The
717 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
718 ENGINE support for HMAC keys which are unextractable. New -mac and
719 -macopt options to dgst utility.
722 *) New option -sigopt to dgst utility. Update dgst to use
723 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
724 alternative signing paramaters such as X9.31 or PSS in the dgst
728 *) Change ssl_cipher_apply_rule(), the internal function that does
729 the work each time a ciphersuite string requests enabling
730 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
731 removing ("!foo+bar") a class of ciphersuites: Now it maintains
732 the order of disabled ciphersuites such that those ciphersuites
733 that most recently went from enabled to disabled not only stay
734 in order with respect to each other, but also have higher priority
735 than other disabled ciphersuites the next time ciphersuites are
738 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
739 the same ciphersuites as with "HIGH" alone, but in a specific
740 order where the PSK ciphersuites come first (since they are the
741 most recently disabled ciphersuites when "HIGH" is parsed).
743 Also, change ssl_create_cipher_list() (using this new
744 funcionality) such that between otherwise identical
745 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
749 *) Change ssl_create_cipher_list() so that it automatically
750 arranges the ciphersuites in reasonable order before starting
751 to process the rule string. Thus, the definition for "DEFAULT"
752 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
753 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
754 This makes it much easier to arrive at a reasonable default order
755 in applications for which anonymous ciphers are OK (meaning
756 that you can't actually use DEFAULT).
757 [Bodo Moeller; suggested by Victor Duchovni]
759 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
760 processing) into multiple integers instead of setting
761 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
762 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
763 (These masks as well as the individual bit definitions are hidden
764 away into the non-exported interface ssl/ssl_locl.h, so this
765 change to the definition of the SSL_CIPHER structure shouldn't
766 affect applications.) This give us more bits for each of these
767 categories, so there is no longer a need to coagulate AES128 and
768 AES256 into a single algorithm bit, and to coagulate Camellia128
769 and Camellia256 into a single algorithm bit, which has led to all
772 Thus, among other things, the kludge introduced in 0.9.7m and
773 0.9.8e for masking out AES256 independently of AES128 or masking
774 out Camellia256 independently of AES256 is not needed here in 0.9.9.
776 With the change, we also introduce new ciphersuite aliases that
777 so far were missing: "AES128", "AES256", "CAMELLIA128", and
781 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
782 Use the leftmost N bytes of the signature input if the input is
783 larger than the prime q (with N being the size in bytes of q).
786 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
787 it yet and it is largely untested.
790 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
793 *) Initial incomplete changes to avoid need for function casts in OpenSSL
794 some compilers (gcc 4.2 and later) reject their use. Safestack is
795 reimplemented. Update ASN1 to avoid use of legacy functions.
798 *) Win32/64 targets are linked with Winsock2.
801 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
802 to external functions. This can be used to increase CRL handling
803 efficiency especially when CRLs are very large by (for example) storing
804 the CRL revoked certificates in a database.
807 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
808 new CRLs added to a directory can be used. New command line option
809 -verify_return_error to s_client and s_server. This causes real errors
810 to be returned by the verify callback instead of carrying on no matter
811 what. This reflects the way a "real world" verify callback would behave.
814 *) GOST engine, supporting several GOST algorithms and public key formats.
815 Kindly donated by Cryptocom.
818 *) Partial support for Issuing Distribution Point CRL extension. CRLs
819 partitioned by DP are handled but no indirect CRL or reason partitioning
820 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
821 selected via a scoring technique which handles IDP and AKID in CRLs.
824 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
825 will ultimately be used for all verify operations: this will remove the
826 X509_STORE dependency on certificate verification and allow alternative
827 lookup methods. X509_STORE based implementations of these two callbacks.
830 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
831 Modify get_crl() to find a valid (unexpired) CRL if possible.
834 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
835 this would be called X509_CRL_cmp() but that name is already used by
836 a function that just compares CRL issuer names. Cache several CRL
837 extensions in X509_CRL structure and cache CRLDP in X509.
840 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
841 this maps equivalent X509_NAME structures into a consistent structure.
842 Name comparison can then be performed rapidly using memcmp().
845 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
849 *) Allow digests to supply their own micalg string for S/MIME type using
850 the ctrl EVP_MD_CTRL_MICALG.
853 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
854 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
855 ctrl. It can then customise the structure before and/or after signing
859 *) New function OBJ_add_sigid() to allow application defined signature OIDs
860 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
861 to free up any added signature OIDs.
864 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
865 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
866 digest and cipher tables. New options added to openssl utility:
867 list-message-digest-algorithms and list-cipher-algorithms.
870 *) Change the array representation of binary polynomials: the list
871 of degrees of non-zero coefficients is now terminated with -1.
872 Previously it was terminated with 0, which was also part of the
873 value; thus, the array representation was not applicable to
874 polynomials where t^0 has coefficient zero. This change makes
875 the array representation useful in a more general context.
878 *) Various modifications and fixes to SSL/TLS cipher string
879 handling. For ECC, the code now distinguishes between fixed ECDH
880 with RSA certificates on the one hand and with ECDSA certificates
881 on the other hand, since these are separate ciphersuites. The
882 unused code for Fortezza ciphersuites has been removed.
884 For consistency with EDH, ephemeral ECDH is now called "EECDH"
885 (not "ECDHE"). For consistency with the code for DH
886 certificates, use of ECDH certificates is now considered ECDH
887 authentication, not RSA or ECDSA authentication (the latter is
888 merely the CA's signing algorithm and not actively used in the
891 The temporary ciphersuite alias "ECCdraft" is no longer
892 available, and ECC ciphersuites are no longer excluded from "ALL"
893 and "DEFAULT". The following aliases now exist for RFC 4492
894 ciphersuites, most of these by analogy with the DH case:
896 kECDHr - ECDH cert, signed with RSA
897 kECDHe - ECDH cert, signed with ECDSA
898 kECDH - ECDH cert (signed with either RSA or ECDSA)
899 kEECDH - ephemeral ECDH
900 ECDH - ECDH cert or ephemeral ECDH
906 AECDH - anonymous ECDH
907 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
911 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
912 Use correct micalg parameters depending on digest(s) in signed message.
915 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
916 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
919 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
920 an engine to register a method. Add ENGINE lookups for methods and
921 functional reference processing.
924 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
925 EVP_{Sign,Verify}* which allow an application to customise the signature
929 *) New -resign option to smime utility. This adds one or more signers
930 to an existing PKCS#7 signedData structure. Also -md option to use an
931 alternative message digest algorithm for signing.
934 *) Tidy up PKCS#7 routines and add new functions to make it easier to
935 create PKCS7 structures containing multiple signers. Update smime
936 application to support multiple signers.
939 *) New -macalg option to pkcs12 utility to allow setting of an alternative
943 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
944 Reorganize PBE internals to lookup from a static table using NIDs,
945 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
946 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
947 PRF which will be automatically used with PBES2.
950 *) Replace the algorithm specific calls to generate keys in "req" with the
954 *) Update PKCS#7 enveloped data routines to use new API. This is now
955 supported by any public key method supporting the encrypt operation. A
956 ctrl is added to allow the public key algorithm to examine or modify
957 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
961 *) Add a ctrl to asn1 method to allow a public key algorithm to express
962 a default digest type to use. In most cases this will be SHA1 but some
963 algorithms (such as GOST) need to specify an alternative digest. The
964 return value indicates how strong the prefernce is 1 means optional and
965 2 is mandatory (that is it is the only supported type). Modify
966 ASN1_item_sign() to accept a NULL digest argument to indicate it should
967 use the default md. Update openssl utilities to use the default digest
968 type for signing if it is not explicitly indicated.
971 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
972 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
973 signing method from the key type. This effectively removes the link
974 between digests and public key types.
977 *) Add an OID cross reference table and utility functions. Its purpose is to
978 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
979 rsaEncryption. This will allow some of the algorithm specific hackery
980 needed to use the correct OID to be removed.
983 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
984 structures for PKCS7_sign(). They are now set up by the relevant public
988 *) Add provisional EC pkey method with support for ECDSA and ECDH.
991 *) Add support for key derivation (agreement) in the API, DH method and
995 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
996 public and private key formats. As a side effect these add additional
997 command line functionality not previously available: DSA signatures can be
998 generated and verified using pkeyutl and DH key support and generation in
1003 [Oliver Tappe <zooey@hirschkaefer.de>]
1005 *) New make target "install_html_docs" installs HTML renditions of the
1007 [Oliver Tappe <zooey@hirschkaefer.de>]
1009 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
1010 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
1011 support key and parameter generation and add initial key generation
1012 functionality for RSA.
1015 *) Add functions for main EVP_PKEY_method operations. The undocumented
1016 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
1017 EVP_PKEY_{encrypt,decrypt}_old.
1020 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
1021 key API, doesn't do much yet.
1024 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
1025 public key algorithms. New option to openssl utility:
1026 "list-public-key-algorithms" to print out info.
1029 *) Implement the Supported Elliptic Curves Extension for
1030 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1033 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
1034 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
1037 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
1038 utilities such as rsa, dsa, dsaparam etc except they process any key
1042 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
1043 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
1044 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
1048 *) Initial support for pluggable public key ASN1.
1049 De-spaghettify the public key ASN1 handling. Move public and private
1050 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
1051 algorithm specific handling to a single module within the relevant
1052 algorithm directory. Add functions to allow (near) opaque processing
1053 of public and private key structures.
1056 *) Implement the Supported Point Formats Extension for
1057 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
1060 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
1061 for the psk identity [hint] and the psk callback functions to the
1062 SSL_SESSION, SSL and SSL_CTX structure.
1065 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
1069 SSL_CTX_use_psk_identity_hint
1070 SSL_get_psk_identity_hint
1071 SSL_get_psk_identity
1072 SSL_use_psk_identity_hint
1074 [Mika Kousa and Pasi Eronen of Nokia Corporation]
1076 *) Add RFC 3161 compliant time stamp request creation, response generation
1077 and response verification functionality.
1078 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
1080 *) Add initial support for TLS extensions, specifically for the server_name
1081 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1082 have new members for a host name. The SSL data structure has an
1083 additional member SSL_CTX *initial_ctx so that new sessions can be
1084 stored in that context to allow for session resumption, even after the
1085 SSL has been switched to a new SSL_CTX in reaction to a client's
1086 server_name extension.
1088 New functions (subject to change):
1090 SSL_get_servername()
1091 SSL_get_servername_type()
1094 New CTRL codes and macros (subject to change):
1096 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1097 - SSL_CTX_set_tlsext_servername_callback()
1098 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1099 - SSL_CTX_set_tlsext_servername_arg()
1100 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1102 openssl s_client has a new '-servername ...' option.
1104 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1105 '-key2 ...', '-servername_fatal' (subject to change). This allows
1106 testing the HostName extension for a specific single host name ('-cert'
1107 and '-key' remain fallbacks for handshakes without HostName
1108 negotiation). If the unrecogninzed_name alert has to be sent, this by
1109 default is a warning; it becomes fatal with the '-servername_fatal'
1112 [Peter Sylvester, Remy Allais, Christophe Renou]
1114 *) Whirlpool hash implementation is added.
1117 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
1118 bn(64,32). Because of instruction set limitations it doesn't have
1119 any negative impact on performance. This was done mostly in order
1120 to make it possible to share assembler modules, such as bn_mul_mont
1121 implementations, between 32- and 64-bit builds without hassle.
1124 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
1125 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
1129 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
1130 dedicated Montgomery multiplication procedure, is introduced.
1131 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
1132 "64-bit" performance on certain 32-bit targets.
1135 *) New option SSL_OP_NO_COMP to disable use of compression selectively
1136 in SSL structures. New SSL ctrl to set maximum send fragment size.
1137 Save memory by seeting the I/O buffer sizes dynamically instead of
1138 using the maximum available value.
1141 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
1142 in addition to the text details.
1145 *) Very, very preliminary EXPERIMENTAL support for printing of general
1146 ASN1 structures. This currently produces rather ugly output and doesn't
1147 handle several customised structures at all.
1150 *) Integrated support for PVK file format and some related formats such
1151 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
1152 these in the 'rsa' and 'dsa' utilities.
1155 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
1158 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
1159 place for the (very old) "NETSCAPE" format certificates which are now
1160 handled using new ASN1 code equivalents.
1163 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
1164 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
1165 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
1168 *) Modify CRL distribution points extension code to print out previously
1169 unsupported fields. Enhance extension setting code to allow setting of
1173 *) Add print and set support for Issuing Distribution Point CRL extension.
1176 *) Change 'Configure' script to enable Camellia by default.
1179 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
1181 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1182 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1184 *) Fix bug in string printing code: if *any* escaping is enabled we must
1185 escape the escape character (backslash) or the resulting string is
1189 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
1191 *) Disable code workaround for ancient and obsolete Netscape browsers
1192 and servers: an attacker can use it in a ciphersuite downgrade attack.
1193 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1196 *) Fixed J-PAKE implementation error, originally discovered by
1197 Sebastien Martini, further info and confirmation from Stefan
1198 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1201 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
1203 *) Fix extension code to avoid race conditions which can result in a buffer
1204 overrun vulnerability: resumed sessions must not be modified as they can
1205 be shared by multiple threads. CVE-2010-3864
1208 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
1211 *) Don't reencode certificate when calculating signature: cache and use
1212 the original encoding instead. This makes signature verification of
1213 some broken encodings work correctly.
1216 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
1217 is also one of the inputs.
1218 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
1220 *) Don't repeatedly append PBE algorithms to table if they already exist.
1221 Sort table on each new add. This effectively makes the table read only
1222 after all algorithms are added and subsequent calls to PKCS12_pbe_add
1226 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
1228 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
1231 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
1232 access or freeing data twice (CVE-2010-0742)
1233 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
1235 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
1236 common in certificates and some applications which only call
1237 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
1241 Reduce copying into .apps and .test in makevms.com
1242 Don't try to use blank CA certificate in CA.com
1243 Allow use of C files from original directories in maketests.com
1244 [Steven M. Schweda" <sms@antinode.info>]
1246 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
1248 *) When rejecting SSL/TLS records due to an incorrect version number, never
1249 update s->server with a new major version number. As of
1250 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
1251 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
1252 the previous behavior could result in a read attempt at NULL when
1253 receiving specific incorrect SSL/TLS records once record payload
1254 protection is active. (CVE-2010-0740)
1255 [Bodo Moeller, Adam Langley <agl@chromium.org>]
1257 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
1258 could be crashed if the relevant tables were not present (e.g. chrooted).
1259 [Tomas Hoger <thoger@redhat.com>]
1261 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
1263 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
1264 [Martin Olsson, Neel Mehta]
1266 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
1267 accommodate for stack sorting, always a write lock!).
1270 *) On some versions of WIN32 Heap32Next is very slow. This can cause
1271 excessive delays in the RAND_poll(): over a minute. As a workaround
1272 include a time check in the inner Heap32Next loop too.
1275 *) The code that handled flushing of data in SSL/TLS originally used the
1276 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
1277 the problem outlined in PR#1949. The fix suggested there however can
1278 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
1279 of Apache). So instead simplify the code to flush unconditionally.
1280 This should be fine since flushing with no data to flush is a no op.
1283 *) Handle TLS versions 2.0 and later properly and correctly use the
1284 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
1285 off ancient servers have a habit of sticking around for a while...
1288 *) Modify compression code so it frees up structures without using the
1289 ex_data callbacks. This works around a problem where some applications
1290 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
1291 restarting) then use compression (e.g. SSL with compression) later.
1292 This results in significant per-connection memory leaks and
1293 has caused some security issues including CVE-2008-1678 and
1297 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
1298 change when encrypting or decrypting.
1301 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
1302 connect and renegotiate with servers which do not support RI.
1303 Until RI is more widely deployed this option is enabled by default.
1306 *) Add "missing" ssl ctrls to clear options and mode.
1309 *) If client attempts to renegotiate and doesn't support RI respond with
1310 a no_renegotiation alert as required by RFC5746. Some renegotiating
1311 TLS clients will continue a connection gracefully when they receive
1312 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1313 waiting for a server hello which it will never receive. Now we treat a
1314 received no_renegotiation alert as a fatal error. This is because
1315 applications requesting a renegotiation might well expect it to succeed
1316 and would have no code in place to handle the server denying it so the
1317 only safe thing to do is to terminate the connection.
1320 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1321 peer supports secure renegotiation and 0 otherwise. Print out peer
1322 renegotiation support in s_client/s_server.
1325 *) Replace the highly broken and deprecated SPKAC certification method with
1326 the updated NID creation version. This should correctly handle UTF8.
1329 *) Implement RFC5746. Re-enable renegotiation but require the extension
1330 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1331 turns out to be a bad idea. It has been replaced by
1332 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1333 SSL_CTX_set_options(). This is really not recommended unless you
1334 know what you are doing.
1335 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1337 *) Fixes to stateless session resumption handling. Use initial_ctx when
1338 issuing and attempting to decrypt tickets in case it has changed during
1339 servername handling. Use a non-zero length session ID when attempting
1340 stateless session resumption: this makes it possible to determine if
1341 a resumption has occurred immediately after receiving server hello
1342 (several places in OpenSSL subtly assume this) instead of later in
1346 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1347 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1348 fixes for a few places where the return code is not checked
1350 [Julia Lawall <julia@diku.dk>]
1352 *) Add --strict-warnings option to Configure script to include devteam
1353 warnings in other configurations.
1356 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1357 makes it possible to install openssl libraries in locations which
1358 have names other than "lib", for example "/usr/lib64" which some
1360 [Steve Henson, based on patch from Jeremy Utley]
1362 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1363 X690 8.9.12 and can produce some misleading textual output of OIDs.
1364 [Steve Henson, reported by Dan Kaminsky]
1366 *) Delete MD2 from algorithm tables. This follows the recommendation in
1367 several standards that it is not used in new applications due to
1368 several cryptographic weaknesses. For binary compatibility reasons
1369 the MD2 API is still compiled in by default.
1372 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1376 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1377 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1379 [Guenter <lists@gknw.net>]
1381 *) Fix the server certificate chain building code to use X509_verify_cert(),
1382 it used to have an ad-hoc builder which was unable to cope with anything
1383 other than a simple chain.
1384 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1386 *) Don't check self signed certificate signatures in X509_verify_cert()
1387 by default (a flag can override this): it just wastes time without
1388 adding any security. As a useful side effect self signed root CAs
1389 with non-FIPS digests are now usable in FIPS mode.
1392 *) In dtls1_process_out_of_seq_message() the check if the current message
1393 is already buffered was missing. For every new message was memory
1394 allocated, allowing an attacker to perform an denial of service attack
1395 with sending out of seq handshake messages until there is no memory
1396 left. Additionally every future messege was buffered, even if the
1397 sequence number made no sense and would be part of another handshake.
1398 So only messages with sequence numbers less than 10 in advance will be
1399 buffered. (CVE-2009-1378)
1400 [Robin Seggelmann, discovered by Daniel Mentz]
1402 *) Records are buffered if they arrive with a future epoch to be
1403 processed after finishing the corresponding handshake. There is
1404 currently no limitation to this buffer allowing an attacker to perform
1405 a DOS attack with sending records with future epochs until there is no
1406 memory left. This patch adds the pqueue_size() function to detemine
1407 the size of a buffer and limits the record buffer to 100 entries.
1409 [Robin Seggelmann, discovered by Daniel Mentz]
1411 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
1412 parent structure is freed. (CVE-2009-1379)
1415 *) Handle non-blocking I/O properly in SSL_shutdown() call.
1416 [Darryl Miles <darryl-mailinglists@netbauds.net>]
1419 [Ilya O. <vrghost@gmail.com>]
1421 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
1423 *) Disable renegotiation completely - this fixes a severe security
1424 problem (CVE-2009-3555) at the cost of breaking all
1425 renegotiation. Renegotiation can be re-enabled by setting
1426 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
1427 run-time. This is really not recommended unless you know what
1431 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
1433 *) Don't set val to NULL when freeing up structures, it is freed up by
1434 underlying code. If sizeof(void *) > sizeof(long) this can result in
1435 zeroing past the valid field. (CVE-2009-0789)
1436 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
1438 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
1439 checked correctly. This would allow some invalid signed attributes to
1440 appear to verify correctly. (CVE-2009-0591)
1441 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1443 *) Reject UniversalString and BMPString types with invalid lengths. This
1444 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
1445 a legal length. (CVE-2009-0590)
1448 *) Set S/MIME signing as the default purpose rather than setting it
1449 unconditionally. This allows applications to override it at the store
1453 *) Permit restricted recursion of ASN1 strings. This is needed in practice
1454 to handle some structures.
1457 *) Improve efficiency of mem_gets: don't search whole buffer each time
1459 [Jeremy Shapiro <jnshapir@us.ibm.com>]
1461 *) New -hex option for openssl rand.
1464 *) Print out UTF8String and NumericString when parsing ASN1.
1467 *) Support NumericString type for name components.
1470 *) Allow CC in the environment to override the automatically chosen
1471 compiler. Note that nothing is done to ensure flags work with the
1475 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
1477 *) Properly check EVP_VerifyFinal() and similar return values
1479 [Ben Laurie, Bodo Moeller, Google Security Team]
1481 *) Enable TLS extensions by default.
1484 *) Allow the CHIL engine to be loaded, whether the application is
1485 multithreaded or not. (This does not release the developer from the
1486 obligation to set up the dynamic locking callbacks.)
1487 [Sander Temme <sander@temme.net>]
1489 *) Use correct exit code if there is an error in dgst command.
1490 [Steve Henson; problem pointed out by Roland Dirlewanger]
1492 *) Tweak Configure so that you need to say "experimental-jpake" to enable
1493 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
1496 *) Add experimental JPAKE support, including demo authentication in
1497 s_client and s_server.
1500 *) Set the comparison function in v3_addr_canonize().
1501 [Rob Austein <sra@hactrn.net>]
1503 *) Add support for XMPP STARTTLS in s_client.
1504 [Philip Paeps <philip@freebsd.org>]
1506 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
1507 to ensure that even with this option, only ciphersuites in the
1508 server's preference list will be accepted. (Note that the option
1509 applies only when resuming a session, so the earlier behavior was
1510 just about the algorithm choice for symmetric cryptography.)
1513 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
1515 *) Fix NULL pointer dereference if a DTLS server received
1516 ChangeCipherSpec as first record (CVE-2009-1386).
1519 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
1520 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
1523 *) The fix in 0.9.8c that supposedly got rid of unsafe
1524 double-checked locking was incomplete for RSA blinding,
1525 addressing just one layer of what turns out to have been
1526 doubly unsafe triple-checked locking.
1528 So now fix this for real by retiring the MONT_HELPER macro
1529 in crypto/rsa/rsa_eay.c.
1531 [Bodo Moeller; problem pointed out by Marius Schilder]
1533 *) Various precautionary measures:
1535 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
1537 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
1538 (NB: This would require knowledge of the secret session ticket key
1539 to exploit, in which case you'd be SOL either way.)
1541 - Change bn_nist.c so that it will properly handle input BIGNUMs
1542 outside the expected range.
1544 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
1547 [Neel Mehta, Bodo Moeller]
1549 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
1550 the load fails. Useful for distros.
1551 [Ben Laurie and the FreeBSD team]
1553 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
1556 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
1559 *) Expand ENGINE to support engine supplied SSL client certificate functions.
1561 This work was sponsored by Logica.
1564 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
1565 keystores. Support for SSL/TLS client authentication too.
1566 Not compiled unless enable-capieng specified to Configure.
1568 This work was sponsored by Logica.
1571 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
1572 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
1573 attribute creation routines such as certifcate requests and PKCS#12
1577 Changes between 0.9.8g and 0.9.8h [28 May 2008]
1579 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
1580 handshake which could lead to a cilent crash as found using the
1581 Codenomicon TLS test suite (CVE-2008-1672)
1582 [Steve Henson, Mark Cox]
1584 *) Fix double free in TLS server name extensions which could lead to
1585 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
1588 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
1590 Clear the error queue to ensure that error entries left from
1591 older function calls do not interfere with the correct operation.
1592 [Lutz Jaenicke, Erik de Castro Lopo]
1594 *) Remove root CA certificates of commercial CAs:
1596 The OpenSSL project does not recommend any specific CA and does not
1597 have any policy with respect to including or excluding any CA.
1598 Therefore it does not make any sense to ship an arbitrary selection
1599 of root CA certificates with the OpenSSL software.
1602 *) RSA OAEP patches to fix two separate invalid memory reads.
1603 The first one involves inputs when 'lzero' is greater than
1604 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
1605 before the beginning of from). The second one involves inputs where
1606 the 'db' section contains nothing but zeroes (there is a one-byte
1607 invalid read after the end of 'db').
1608 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1610 *) Partial backport from 0.9.9-dev:
1612 Introduce bn_mul_mont (dedicated Montgomery multiplication
1613 procedure) as a candidate for BIGNUM assembler implementation.
1614 While 0.9.9-dev uses assembler for various architectures, only
1615 x86_64 is available by default here in the 0.9.8 branch, and
1616 32-bit x86 is available through a compile-time setting.
1618 To try the 32-bit x86 assembler implementation, use Configure
1619 option "enable-montasm" (which exists only for this backport).
1621 As "enable-montasm" for 32-bit x86 disclaims code stability
1622 anyway, in this constellation we activate additional code
1623 backported from 0.9.9-dev for further performance improvements,
1624 namely BN_from_montgomery_word. (To enable this otherwise,
1625 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
1627 [Andy Polyakov (backport partially by Bodo Moeller)]
1629 *) Add TLS session ticket callback. This allows an application to set
1630 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
1631 values. This is useful for key rollover for example where several key
1632 sets may exist with different names.
1635 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
1636 This was broken until now in 0.9.8 releases, such that the only way
1637 a registered ENGINE could be used (assuming it initialises
1638 successfully on the host) was to explicitly set it as the default
1639 for the relevant algorithms. This is in contradiction with 0.9.7
1640 behaviour and the documentation. With this fix, when an ENGINE is
1641 registered into a given algorithm's table of implementations, the
1642 'uptodate' flag is reset so that auto-discovery will be used next
1643 time a new context for that algorithm attempts to select an
1645 [Ian Lister (tweaked by Geoff Thorpe)]
1647 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
1648 implemention in the following ways:
1650 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
1653 Lack of BER streaming support means one pass streaming processing is
1654 only supported if data is detached: setting the streaming flag is
1655 ignored for embedded content.
1657 CMS support is disabled by default and must be explicitly enabled
1658 with the enable-cms configuration option.
1661 *) Update the GMP engine glue to do direct copies between BIGNUM and
1662 mpz_t when openssl and GMP use the same limb size. Otherwise the
1663 existing "conversion via a text string export" trick is still used.
1664 [Paul Sheer <paulsheer@gmail.com>]
1666 *) Zlib compression BIO. This is a filter BIO which compressed and
1667 uncompresses any data passed through it.
1670 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
1671 RFC3394 compatible AES key wrapping.
1674 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
1675 sets string data without copying. X509_ALGOR_set0() and
1676 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
1677 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
1678 from an X509_ATTRIBUTE structure optionally checking it occurs only
1679 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
1683 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
1684 to get the expected BN_FLG_CONSTTIME behavior.
1685 [Bodo Moeller (Google)]
1689 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
1690 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
1691 - added some more tests to do_tests.pl
1692 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
1693 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
1694 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
1695 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
1696 - various changes to netware.pl to enable gcc-cross builds on Win32
1698 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
1699 - various changes to fix missing prototype warnings
1700 - fixed x86nasm.pl to create correct asm files for NASM COFF output
1701 - added AES, WHIRLPOOL and CPUID assembler code to build files
1702 - added missing AES assembler make rules to mk1mf.pl
1703 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
1704 [Guenter Knauf <eflash@gmx.net>]
1706 *) Implement certificate status request TLS extension defined in RFC3546.
1707 A client can set the appropriate parameters and receive the encoded
1708 OCSP response via a callback. A server can query the supplied parameters
1709 and set the encoded OCSP response in the callback. Add simplified examples
1710 to s_client and s_server.
1713 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
1715 *) Fix various bugs:
1716 + Binary incompatibility of ssl_ctx_st structure
1717 + DTLS interoperation with non-compliant servers
1718 + Don't call get_session_cb() without proposed session
1719 + Fix ia64 assembler code
1720 [Andy Polyakov, Steve Henson]
1722 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
1724 *) DTLS Handshake overhaul. There were longstanding issues with
1725 OpenSSL DTLS implementation, which were making it impossible for
1726 RFC 4347 compliant client to communicate with OpenSSL server.
1727 Unfortunately just fixing these incompatibilities would "cut off"
1728 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
1729 server keeps tolerating non RFC compliant syntax. The opposite is
1730 not true, 0.9.8f client can not communicate with earlier server.
1731 This update even addresses CVE-2007-4995.
1734 *) Changes to avoid need for function casts in OpenSSL: some compilers
1735 (gcc 4.2 and later) reject their use.
1736 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
1739 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1740 RFC4507bis. The encrypted ticket format is an encrypted encoded
1741 SSL_SESSION structure, that way new session features are automatically
1744 If a client application caches session in an SSL_SESSION structure
1745 support is transparent because tickets are now stored in the encoded
1748 The SSL_CTX structure automatically generates keys for ticket
1749 protection in servers so again support should be possible
1750 with no application modification.
1752 If a client or server wishes to disable RFC4507 support then the option
1753 SSL_OP_NO_TICKET can be set.
1755 Add a TLS extension debugging callback to allow the contents of any client
1756 or server extensions to be examined.
1758 This work was sponsored by Google.
1761 *) Add initial support for TLS extensions, specifically for the server_name
1762 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1763 have new members for a host name. The SSL data structure has an
1764 additional member SSL_CTX *initial_ctx so that new sessions can be
1765 stored in that context to allow for session resumption, even after the
1766 SSL has been switched to a new SSL_CTX in reaction to a client's
1767 server_name extension.
1769 New functions (subject to change):
1771 SSL_get_servername()
1772 SSL_get_servername_type()
1775 New CTRL codes and macros (subject to change):
1777 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1778 - SSL_CTX_set_tlsext_servername_callback()
1779 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1780 - SSL_CTX_set_tlsext_servername_arg()
1781 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1783 openssl s_client has a new '-servername ...' option.
1785 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1786 '-key2 ...', '-servername_fatal' (subject to change). This allows
1787 testing the HostName extension for a specific single host name ('-cert'
1788 and '-key' remain fallbacks for handshakes without HostName
1789 negotiation). If the unrecogninzed_name alert has to be sent, this by
1790 default is a warning; it becomes fatal with the '-servername_fatal'
1793 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
1795 *) Add AES and SSE2 assembly language support to VC++ build.
1798 *) Mitigate attack on final subtraction in Montgomery reduction.
1801 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
1802 (which previously caused an internal error).
1805 *) Squeeze another 10% out of IGE mode when in != out.
1808 *) AES IGE mode speedup.
1809 [Dean Gaudet (Google)]
1811 *) Add the Korean symmetric 128-bit cipher SEED (see
1812 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
1813 add SEED ciphersuites from RFC 4162:
1815 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
1816 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
1817 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
1818 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
1820 To minimize changes between patchlevels in the OpenSSL 0.9.8
1821 series, SEED remains excluded from compilation unless OpenSSL
1822 is configured with 'enable-seed'.
1823 [KISA, Bodo Moeller]
1825 *) Mitigate branch prediction attacks, which can be practical if a
1826 single processor is shared, allowing a spy process to extract
1827 information. For detailed background information, see
1828 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
1829 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
1830 and Necessary Software Countermeasures"). The core of the change
1831 are new versions BN_div_no_branch() and
1832 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
1833 respectively, which are slower, but avoid the security-relevant
1834 conditional branches. These are automatically called by BN_div()
1835 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
1836 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
1837 remove a conditional branch.
1839 BN_FLG_CONSTTIME is the new name for the previous
1840 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
1841 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
1842 in the exponent causes BN_mod_exp_mont() to use the alternative
1843 implementation in BN_mod_exp_mont_consttime().) The old name
1844 remains as a deprecated alias.
1846 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
1847 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
1848 constant-time implementations for more than just exponentiation.
1849 Here too the old name is kept as a deprecated alias.
1851 BN_BLINDING_new() will now use BN_dup() for the modulus so that
1852 the BN_BLINDING structure gets an independent copy of the
1853 modulus. This means that the previous "BIGNUM *m" argument to
1854 BN_BLINDING_new() and to BN_BLINDING_create_param() now
1855 essentially becomes "const BIGNUM *m", although we can't actually
1856 change this in the header file before 0.9.9. It allows
1857 RSA_setup_blinding() to use BN_with_flags() on the modulus to
1858 enable BN_FLG_CONSTTIME.
1860 [Matthew D Wood (Intel Corp)]
1862 *) In the SSL/TLS server implementation, be strict about session ID
1863 context matching (which matters if an application uses a single
1864 external cache for different purposes). Previously,
1865 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
1866 set. This did ensure strict client verification, but meant that,
1867 with applications using a single external cache for quite
1868 different requirements, clients could circumvent ciphersuite
1869 restrictions for a given session ID context by starting a session
1870 in a different context.
1873 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
1874 a ciphersuite string such as "DEFAULT:RSA" cannot enable
1875 authentication-only ciphersuites.
1878 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
1879 not complete and could lead to a possible single byte overflow
1880 (CVE-2007-5135) [Ben Laurie]
1882 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
1884 *) Since AES128 and AES256 (and similarly Camellia128 and
1885 Camellia256) share a single mask bit in the logic of
1886 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
1887 kludge to work properly if AES128 is available and AES256 isn't
1888 (or if Camellia128 is available and Camellia256 isn't).
1891 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
1892 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
1893 When a point or a seed is encoded in a BIT STRING, we need to
1894 prevent the removal of trailing zero bits to get the proper DER
1895 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
1896 of a NamedBitList, for which trailing 0 bits need to be removed.)
1899 *) Have SSL/TLS server implementation tolerate "mismatched" record
1900 protocol version while receiving ClientHello even if the
1901 ClientHello is fragmented. (The server can't insist on the
1902 particular protocol version it has chosen before the ServerHello
1903 message has informed the client about his choice.)
1906 *) Add RFC 3779 support.
1907 [Rob Austein for ARIN, Ben Laurie]
1909 *) Load error codes if they are not already present instead of using a
1910 static variable. This allows them to be cleanly unloaded and reloaded.
1911 Improve header file function name parsing.
1914 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
1915 or CAPABILITY handshake as required by RFCs.
1918 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
1920 *) Introduce limits to prevent malicious keys being able to
1921 cause a denial of service. (CVE-2006-2940)
1922 [Steve Henson, Bodo Moeller]
1924 *) Fix ASN.1 parsing of certain invalid structures that can result
1925 in a denial of service. (CVE-2006-2937) [Steve Henson]
1927 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
1928 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
1930 *) Fix SSL client code which could crash if connecting to a
1931 malicious SSLv2 server. (CVE-2006-4343)
1932 [Tavis Ormandy and Will Drewry, Google Security Team]
1934 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
1935 match only those. Before that, "AES256-SHA" would be interpreted
1936 as a pattern and match "AES128-SHA" too (since AES128-SHA got
1937 the same strength classification in 0.9.7h) as we currently only
1938 have a single AES bit in the ciphersuite description bitmap.
1939 That change, however, also applied to ciphersuite strings such as
1940 "RC4-MD5" that intentionally matched multiple ciphersuites --
1941 namely, SSL 2.0 ciphersuites in addition to the more common ones
1942 from SSL 3.0/TLS 1.0.
1944 So we change the selection algorithm again: Naming an explicit
1945 ciphersuite selects this one ciphersuite, and any other similar
1946 ciphersuite (same bitmap) from *other* protocol versions.
1947 Thus, "RC4-MD5" again will properly select both the SSL 2.0
1948 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
1950 Since SSL 2.0 does not have any ciphersuites for which the
1951 128/256 bit distinction would be relevant, this works for now.
1952 The proper fix will be to use different bits for AES128 and
1953 AES256, which would have avoided the problems from the beginning;
1954 however, bits are scarce, so we can only do this in a new release
1955 (not just a patchlevel) when we can change the SSL_CIPHER
1956 definition to split the single 'unsigned long mask' bitmap into
1957 multiple values to extend the available space.
1961 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
1963 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
1964 (CVE-2006-4339) [Ben Laurie and Google Security Team]
1966 *) Add AES IGE and biIGE modes.
1969 *) Change the Unix randomness entropy gathering to use poll() when
1970 possible instead of select(), since the latter has some
1971 undesirable limitations.
1972 [Darryl Miles via Richard Levitte and Bodo Moeller]
1974 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
1975 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
1976 cannot be implicitly activated as part of, e.g., the "AES" alias.
1977 However, please upgrade to OpenSSL 0.9.9[-dev] for
1978 non-experimental use of the ECC ciphersuites to get TLS extension
1979 support, which is required for curve and point format negotiation
1980 to avoid potential handshake problems.
1983 *) Disable rogue ciphersuites:
1985 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
1986 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
1987 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
1989 The latter two were purportedly from
1990 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
1993 Also deactivate the remaining ciphersuites from
1994 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
1995 unofficial, and the ID has long expired.
1998 *) Fix RSA blinding Heisenbug (problems sometimes occured on
1999 dual-core machines) and other potential thread-safety issues.
2002 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
2003 versions), which is now available for royalty-free use
2004 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
2005 Also, add Camellia TLS ciphersuites from RFC 4132.
2007 To minimize changes between patchlevels in the OpenSSL 0.9.8
2008 series, Camellia remains excluded from compilation unless OpenSSL
2009 is configured with 'enable-camellia'.
2012 *) Disable the padding bug check when compression is in use. The padding
2013 bug check assumes the first packet is of even length, this is not
2014 necessarily true if compresssion is enabled and can result in false
2015 positives causing handshake failure. The actual bug test is ancient
2016 code so it is hoped that implementations will either have fixed it by
2017 now or any which still have the bug do not support compression.
2020 Changes between 0.9.8a and 0.9.8b [04 May 2006]
2022 *) When applying a cipher rule check to see if string match is an explicit
2023 cipher suite and only match that one cipher suite if it is.
2026 *) Link in manifests for VC++ if needed.
2027 [Austin Ziegler <halostatue@gmail.com>]
2029 *) Update support for ECC-based TLS ciphersuites according to
2030 draft-ietf-tls-ecc-12.txt with proposed changes (but without
2031 TLS extensions, which are supported starting with the 0.9.9
2032 branch, not in the OpenSSL 0.9.8 branch).
2035 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
2036 opaque EVP_CIPHER_CTX handling.
2039 *) Fixes and enhancements to zlib compression code. We now only use
2040 "zlib1.dll" and use the default __cdecl calling convention on Win32
2041 to conform with the standards mentioned here:
2042 http://www.zlib.net/DLL_FAQ.txt
2043 Static zlib linking now works on Windows and the new --with-zlib-include
2044 --with-zlib-lib options to Configure can be used to supply the location
2045 of the headers and library. Gracefully handle case where zlib library
2049 *) Several fixes and enhancements to the OID generation code. The old code
2050 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
2051 handle numbers larger than ULONG_MAX, truncated printing and had a
2052 non standard OBJ_obj2txt() behaviour.
2055 *) Add support for building of engines under engine/ as shared libraries
2056 under VC++ build system.
2059 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
2060 Hopefully, we will not see any false combination of paths any more.
2063 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
2065 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2066 (part of SSL_OP_ALL). This option used to disable the
2067 countermeasure against man-in-the-middle protocol-version
2068 rollback in the SSL 2.0 server implementation, which is a bad
2069 idea. (CVE-2005-2969)
2071 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2072 for Information Security, National Institute of Advanced Industrial
2073 Science and Technology [AIST], Japan)]
2075 *) Add two function to clear and return the verify parameter flags.
2078 *) Keep cipherlists sorted in the source instead of sorting them at
2079 runtime, thus removing the need for a lock.
2082 *) Avoid some small subgroup attacks in Diffie-Hellman.
2083 [Nick Mathewson and Ben Laurie]
2085 *) Add functions for well-known primes.
2088 *) Extended Windows CE support.
2089 [Satoshi Nakamura and Andy Polyakov]
2091 *) Initialize SSL_METHOD structures at compile time instead of during
2092 runtime, thus removing the need for a lock.
2095 *) Make PKCS7_decrypt() work even if no certificate is supplied by
2096 attempting to decrypt each encrypted key in turn. Add support to
2100 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
2102 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
2105 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
2108 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
2109 key into the same file any more.
2112 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
2115 *) Add -utf8 command line and config file option to 'ca'.
2116 [Stefan <stf@udoma.org]
2118 *) Removed the macro des_crypt(), as it seems to conflict with some
2119 libraries. Use DES_crypt().
2122 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
2123 involves renaming the source and generated shared-libs for
2124 both. The engines will accept the corrected or legacy ids
2125 ('ncipher' and '4758_cca' respectively) when binding. NB,
2126 this only applies when building 'shared'.
2127 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
2129 *) Add attribute functions to EVP_PKEY structure. Modify
2130 PKCS12_create() to recognize a CSP name attribute and
2131 use it. Make -CSP option work again in pkcs12 utility.
2134 *) Add new functionality to the bn blinding code:
2135 - automatic re-creation of the BN_BLINDING parameters after
2136 a fixed number of uses (currently 32)
2137 - add new function for parameter creation
2138 - introduce flags to control the update behaviour of the
2139 BN_BLINDING parameters
2140 - hide BN_BLINDING structure
2141 Add a second BN_BLINDING slot to the RSA structure to improve
2142 performance when a single RSA object is shared among several
2146 *) Add support for DTLS.
2147 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
2149 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
2150 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
2153 *) Remove buggy and incompletet DH cert support from
2154 ssl/ssl_rsa.c and ssl/s3_both.c
2157 *) Use SHA-1 instead of MD5 as the default digest algorithm for
2158 the apps/openssl applications.
2161 *) Compile clean with "-Wall -Wmissing-prototypes
2162 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
2163 DEBUG_SAFESTACK must also be set.
2166 *) Change ./Configure so that certain algorithms can be disabled by default.
2167 The new counterpiece to "no-xxx" is "enable-xxx".
2169 The patented RC5 and MDC2 algorithms will now be disabled unless
2170 "enable-rc5" and "enable-mdc2", respectively, are specified.
2172 (IDEA remains enabled despite being patented. This is because IDEA
2173 is frequently required for interoperability, and there is no license
2174 fee for non-commercial use. As before, "no-idea" can be used to
2175 avoid this algorithm.)
2179 *) Add processing of proxy certificates (see RFC 3820). This work was
2180 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
2181 EGEE (Enabling Grids for E-science in Europe).
2184 *) RC4 performance overhaul on modern architectures/implementations, such
2185 as Intel P4, IA-64 and AMD64.
2188 *) New utility extract-section.pl. This can be used specify an alternative
2189 section number in a pod file instead of having to treat each file as
2190 a separate case in Makefile. This can be done by adding two lines to the
2193 =for comment openssl_section:XXX
2195 The blank line is mandatory.
2199 *) New arguments -certform, -keyform and -pass for s_client and s_server
2200 to allow alternative format key and certificate files and passphrase
2204 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
2205 update associated structures and add various utility functions.
2207 Add new policy related verify parameters, include policy checking in
2208 standard verify code. Enhance 'smime' application with extra parameters
2209 to support policy checking and print out.
2212 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
2213 Nehemiah processors. These extensions support AES encryption in hardware
2214 as well as RNG (though RNG support is currently disabled).
2215 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
2217 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
2220 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
2221 [Andy Polyakov and a number of other people]
2223 *) Improved PowerPC platform support. Most notably BIGNUM assembler
2224 implementation contributed by IBM.
2225 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
2227 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
2228 exponent rather than 'unsigned long'. There is a corresponding change to
2229 the new 'rsa_keygen' element of the RSA_METHOD structure.
2230 [Jelte Jansen, Geoff Thorpe]
2232 *) Functionality for creating the initial serial number file is now
2233 moved from CA.pl to the 'ca' utility with a new option -create_serial.
2235 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
2236 number file to 1, which is bound to cause problems. To avoid
2237 the problems while respecting compatibility between different 0.9.7
2238 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
2239 CA.pl for serial number initialization. With the new release 0.9.8,
2240 we can fix the problem directly in the 'ca' utility.)
2243 *) Reduced header interdepencies by declaring more opaque objects in
2244 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
2245 give fewer recursive includes, which could break lazy source code - so
2246 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
2247 developers should define this symbol when building and using openssl to
2248 ensure they track the recommended behaviour, interfaces, [etc], but
2249 backwards-compatible behaviour prevails when this isn't defined.
2252 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
2255 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
2256 This will generate a random key of the appropriate length based on the
2257 cipher context. The EVP_CIPHER can provide its own random key generation
2258 routine to support keys of a specific form. This is used in the des and
2259 3des routines to generate a key of the correct parity. Update S/MIME
2260 code to use new functions and hence generate correct parity DES keys.
2261 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
2262 valid (weak or incorrect parity).
2265 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
2266 as looking them up. This is useful when the verified structure may contain
2267 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
2268 present unless the new PKCS7_NO_CRL flag is asserted.
2271 *) Extend ASN1 oid configuration module. It now additionally accepts the
2274 shortName = some long name, 1.2.3.4
2277 *) Reimplemented the BN_CTX implementation. There is now no more static
2278 limitation on the number of variables it can handle nor the depth of the
2279 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
2280 information can now expand as required, and rather than having a single
2281 static array of bignums, BN_CTX now uses a linked-list of such arrays
2282 allowing it to expand on demand whilst maintaining the usefulness of
2283 BN_CTX's "bundling".
2286 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
2287 to allow all RSA operations to function using a single BN_CTX.
2290 *) Preliminary support for certificate policy evaluation and checking. This
2291 is initially intended to pass the tests outlined in "Conformance Testing
2292 of Relying Party Client Certificate Path Processing Logic" v1.07.
2295 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
2296 remained unused and not that useful. A variety of other little bignum
2297 tweaks and fixes have also been made continuing on from the audit (see
2301 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
2302 associated ASN1, EVP and SSL functions and old ASN1 macros.
2305 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
2306 and this should never fail. So the return value from the use of
2307 BN_set_word() (which can fail due to needless expansion) is now deprecated;
2308 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
2311 *) BN_CTX_get() should return zero-valued bignums, providing the same
2312 initialised value as BN_new().
2313 [Geoff Thorpe, suggested by Ulf Möller]
2315 *) Support for inhibitAnyPolicy certificate extension.
2318 *) An audit of the BIGNUM code is underway, for which debugging code is
2319 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2320 is considered valid when processing BIGNUMs, and causes execution to
2321 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2322 further steps are taken to deliberately pollute unused data in BIGNUM
2323 structures to try and expose faulty code further on. For now, openssl will
2324 (in its default mode of operation) continue to tolerate the inconsistent
2325 forms that it has tolerated in the past, but authors and packagers should
2326 consider trying openssl and their own applications when compiled with
2327 these debugging symbols defined. It will help highlight potential bugs in
2328 their own code, and will improve the test coverage for OpenSSL itself. At
2329 some point, these tighter rules will become openssl's default to improve
2330 maintainability, though the assert()s and other overheads will remain only
2331 in debugging configurations. See bn.h for more details.
2332 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2334 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2335 that can only be obtained through BN_CTX_new() (which implicitly
2336 initialises it). The presence of this function only made it possible
2337 to overwrite an existing structure (and cause memory leaks).
2340 *) Because of the callback-based approach for implementing LHASH as a
2341 template type, lh_insert() adds opaque objects to hash-tables and
2342 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2343 to clean up those corresponding objects before destroying the hash table
2344 (and losing the object pointers). So some over-zealous constifications in
2345 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2346 objects as "const" and the lh_doall[_arg] callback wrappers are not
2347 prototyped to have "const" restrictions on the object pointers they are
2348 given (and so aren't required to cast them away any more).
2351 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2352 (speed) prefers to use its own implementation. The two implementations
2353 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2354 its object type properly exposed (MS_TM) instead of casting to/from "char
2355 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2356 aren't necessarily the greatest nomenclatures - but this is what was used
2357 internally to the implementation so I've used that for now.
2360 *) Ensure that deprecated functions do not get compiled when
2361 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2362 the self-tests were still using deprecated key-generation functions so
2363 these have been updated also.
2366 *) Reorganise PKCS#7 code to separate the digest location functionality
2367 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2368 New function PKCS7_set_digest() to set the digest type for PKCS#7
2369 digestedData type. Add additional code to correctly generate the
2370 digestedData type and add support for this type in PKCS7 initialization
2374 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2375 structure of type "other".
2378 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2379 sure the loop does correctly stop and breaking ("division by zero")
2380 modulus operations are not performed. The (pre-generated) prime
2381 table crypto/bn/bn_prime.h was already correct, but it could not be
2382 re-generated on some platforms because of the "division by zero"
2383 situation in the script.
2384 [Ralf S. Engelschall]
2386 *) Update support for ECC-based TLS ciphersuites according to
2387 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2388 SHA-1 now is only used for "small" curves (where the
2389 representation of a field element takes up to 24 bytes); for
2390 larger curves, the field element resulting from ECDH is directly
2391 used as premaster secret.
2392 [Douglas Stebila (Sun Microsystems Laboratories)]
2394 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2395 curve secp160r1 to the tests.
2396 [Douglas Stebila (Sun Microsystems Laboratories)]
2398 *) Add the possibility to load symbols globally with DSO.
2399 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
2401 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
2402 control of the error stack.
2405 *) Add support for STORE in ENGINE.
2408 *) Add the STORE type. The intention is to provide a common interface
2409 to certificate and key stores, be they simple file-based stores, or
2410 HSM-type store, or LDAP stores, or...
2411 NOTE: The code is currently UNTESTED and isn't really used anywhere.
2414 *) Add a generic structure called OPENSSL_ITEM. This can be used to
2415 pass a list of arguments to any function as well as provide a way
2416 for a function to pass data back to the caller.
2419 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
2420 works like BUF_strdup() but can be used to duplicate a portion of
2421 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
2425 *) Add the function sk_find_ex() which works like sk_find(), but will
2426 return an index to an element even if an exact match couldn't be
2427 found. The index is guaranteed to point at the element where the
2428 searched-for key would be inserted to preserve sorting order.
2431 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
2432 takes an extra flags argument for optional functionality. Currently,
2433 the following flags are defined:
2435 OBJ_BSEARCH_VALUE_ON_NOMATCH
2436 This one gets OBJ_bsearch_ex() to return a pointer to the first
2437 element where the comparing function returns a negative or zero
2440 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
2441 This one gets OBJ_bsearch_ex() to return a pointer to the first
2442 element where the comparing function returns zero. This is useful
2443 if there are more than one element where the comparing function
2447 *) Make it possible to create self-signed certificates with 'openssl ca'
2448 in such a way that the self-signed certificate becomes part of the
2449 CA database and uses the same mechanisms for serial number generation
2450 as all other certificate signing. The new flag '-selfsign' enables
2451 this functionality. Adapt CA.sh and CA.pl.in.
2454 *) Add functionality to check the public key of a certificate request
2455 against a given private. This is useful to check that a certificate
2456 request can be signed by that key (self-signing).
2459 *) Make it possible to have multiple active certificates with the same
2460 subject in the CA index file. This is done only if the keyword
2461 'unique_subject' is set to 'no' in the main CA section (default
2462 if 'CA_default') of the configuration file. The value is saved
2463 with the database itself in a separate index attribute file,
2464 named like the index file with '.attr' appended to the name.
2467 *) Generate muti valued AVAs using '+' notation in config files for
2471 *) Support for nameConstraints certificate extension.
2474 *) Support for policyConstraints certificate extension.
2477 *) Support for policyMappings certificate extension.
2480 *) Make sure the default DSA_METHOD implementation only uses its
2481 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
2482 and change its own handlers to be NULL so as to remove unnecessary
2483 indirection. This lets alternative implementations fallback to the
2484 default implementation more easily.
2487 *) Support for directoryName in GeneralName related extensions
2491 *) Make it possible to link applications using Makefile.shared.
2492 Make that possible even when linking against static libraries!
2495 *) Support for single pass processing for S/MIME signing. This now
2496 means that S/MIME signing can be done from a pipe, in addition
2497 cleartext signing (multipart/signed type) is effectively streaming
2498 and the signed data does not need to be all held in memory.
2500 This is done with a new flag PKCS7_STREAM. When this flag is set
2501 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
2502 is done after the data is output (and digests calculated) in
2503 SMIME_write_PKCS7().
2506 *) Add full support for -rpath/-R, both in shared libraries and
2507 applications, at least on the platforms where it's known how
2511 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
2512 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
2513 will now compute a table of multiples of the generator that
2514 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
2515 faster (notably in the case of a single point multiplication,
2516 scalar * generator).
2517 [Nils Larsch, Bodo Moeller]
2519 *) IPv6 support for certificate extensions. The various extensions
2520 which use the IP:a.b.c.d can now take IPv6 addresses using the
2521 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
2525 *) Added an ENGINE that implements RSA by performing private key
2526 exponentiations with the GMP library. The conversions to and from
2527 GMP's mpz_t format aren't optimised nor are any montgomery forms
2528 cached, and on x86 it appears OpenSSL's own performance has caught up.
2529 However there are likely to be other architectures where GMP could
2530 provide a boost. This ENGINE is not built in by default, but it can be
2531 specified at Configure time and should be accompanied by the necessary
2532 linker additions, eg;
2533 ./config -DOPENSSL_USE_GMP -lgmp
2536 *) "openssl engine" will not display ENGINE/DSO load failure errors when
2537 testing availability of engines with "-t" - the old behaviour is
2538 produced by increasing the feature's verbosity with "-tt".
2541 *) ECDSA routines: under certain error conditions uninitialized BN objects
2542 could be freed. Solution: make sure initialization is performed early
2543 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
2547 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
2548 and DH_METHOD (eg. by ENGINE implementations) to override the normal
2549 software implementations. For DSA and DH, parameter generation can
2550 also be overriden by providing the appropriate method callbacks.
2553 *) Change the "progress" mechanism used in key-generation and
2554 primality testing to functions that take a new BN_GENCB pointer in
2555 place of callback/argument pairs. The new API functions have "_ex"
2556 postfixes and the older functions are reimplemented as wrappers for
2557 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
2558 declarations of the old functions to help (graceful) attempts to
2559 migrate to the new functions. Also, the new key-generation API
2560 functions operate on a caller-supplied key-structure and return
2561 success/failure rather than returning a key or NULL - this is to
2562 help make "keygen" another member function of RSA_METHOD etc.
2564 Example for using the new callback interface:
2566 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
2570 BN_GENCB_set(&my_cb, my_callback, my_arg);
2572 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
2573 /* For the meaning of a, b in calls to my_callback(), see the
2574 * documentation of the function that calls the callback.
2575 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
2576 * my_callback should return 1 if it wants BN_is_prime_ex()
2577 * to continue, or 0 to stop.
2582 *) Change the ZLIB compression method to be stateful, and make it
2583 available to TLS with the number defined in
2584 draft-ietf-tls-compression-04.txt.
2587 *) Add the ASN.1 structures and functions for CertificatePair, which
2588 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
2590 CertificatePair ::= SEQUENCE {
2591 forward [0] Certificate OPTIONAL,
2592 reverse [1] Certificate OPTIONAL,
2593 -- at least one of the pair shall be present -- }
2595 Also implement the PEM functions to read and write certificate
2596 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
2598 This needed to be defined, mostly for the sake of the LDAP
2599 attribute crossCertificatePair, but may prove useful elsewhere as
2603 *) Make it possible to inhibit symlinking of shared libraries in
2604 Makefile.shared, for Cygwin's sake.
2607 *) Extend the BIGNUM API by creating a function
2608 void BN_set_negative(BIGNUM *a, int neg);
2609 and a macro that behave like
2610 int BN_is_negative(const BIGNUM *a);
2612 to avoid the need to access 'a->neg' directly in applications.
2615 *) Implement fast modular reduction for pseudo-Mersenne primes
2616 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
2617 EC_GROUP_new_curve_GFp() will now automatically use this
2619 [Nils Larsch <nla@trustcenter.de>]
2621 *) Add new lock type (CRYPTO_LOCK_BN).
2624 *) Change the ENGINE framework to automatically load engines
2625 dynamically from specific directories unless they could be
2626 found to already be built in or loaded. Move all the
2627 current engines except for the cryptodev one to a new
2629 The engines in engines/ are built as shared libraries if
2630 the "shared" options was given to ./Configure or ./config.
2631 Otherwise, they are inserted in libcrypto.a.
2632 /usr/local/ssl/engines is the default directory for dynamic
2633 engines, but that can be overriden at configure time through
2634 the usual use of --prefix and/or --openssldir, and at run
2635 time with the environment variable OPENSSL_ENGINES.
2636 [Geoff Thorpe and Richard Levitte]
2638 *) Add Makefile.shared, a helper makefile to build shared
2639 libraries. Addapt Makefile.org.
2642 *) Add version info to Win32 DLLs.
2643 [Peter 'Luna' Runestig" <peter@runestig.com>]
2645 *) Add new 'medium level' PKCS#12 API. Certificates and keys
2646 can be added using this API to created arbitrary PKCS#12
2647 files while avoiding the low level API.
2649 New options to PKCS12_create(), key or cert can be NULL and
2650 will then be omitted from the output file. The encryption
2651 algorithm NIDs can be set to -1 for no encryption, the mac
2652 iteration count can be set to 0 to omit the mac.
2654 Enhance pkcs12 utility by making the -nokeys and -nocerts
2655 options work when creating a PKCS#12 file. New option -nomac
2656 to omit the mac, NONE can be set for an encryption algorithm.
2657 New code is modified to use the enhanced PKCS12_create()
2658 instead of the low level API.
2661 *) Extend ASN1 encoder to support indefinite length constructed
2662 encoding. This can output sequences tags and octet strings in
2663 this form. Modify pk7_asn1.c to support indefinite length
2664 encoding. This is experimental and needs additional code to
2665 be useful, such as an ASN1 bio and some enhanced streaming
2668 Extend template encode functionality so that tagging is passed
2669 down to the template encoder.
2672 *) Let 'openssl req' fail if an argument to '-newkey' is not
2673 recognized instead of using RSA as a default.
2676 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
2677 As these are not official, they are not included in "ALL";
2678 the "ECCdraft" ciphersuite group alias can be used to select them.
2679 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
2681 *) Add ECDH engine support.
2682 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
2684 *) Add ECDH in new directory crypto/ecdh/.
2685 [Douglas Stebila (Sun Microsystems Laboratories)]
2687 *) Let BN_rand_range() abort with an error after 100 iterations
2688 without success (which indicates a broken PRNG).
2691 *) Change BN_mod_sqrt() so that it verifies that the input value
2692 is really the square of the return value. (Previously,
2693 BN_mod_sqrt would show GIGO behaviour.)
2696 *) Add named elliptic curves over binary fields from X9.62, SECG,
2697 and WAP/WTLS; add OIDs that were still missing.
2699 [Sheueling Chang Shantz and Douglas Stebila
2700 (Sun Microsystems Laboratories)]
2702 *) Extend the EC library for elliptic curves over binary fields
2703 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
2706 EC_GF2m_simple_method
2710 EC_GROUP_new_curve_GF2m
2711 EC_GROUP_set_curve_GF2m
2712 EC_GROUP_get_curve_GF2m
2713 EC_POINT_set_affine_coordinates_GF2m
2714 EC_POINT_get_affine_coordinates_GF2m
2715 EC_POINT_set_compressed_coordinates_GF2m
2717 Point compression for binary fields is disabled by default for
2718 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
2721 As binary polynomials are represented as BIGNUMs, various members
2722 of the EC_GROUP and EC_POINT data structures can be shared
2723 between the implementations for prime fields and binary fields;
2724 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
2725 are essentially identical to their ..._GFp counterparts.
2726 (For simplicity, the '..._GFp' prefix has been dropped from
2727 various internal method names.)
2729 An internal 'field_div' method (similar to 'field_mul' and
2730 'field_sqr') has been added; this is used only for binary fields.
2732 [Sheueling Chang Shantz and Douglas Stebila
2733 (Sun Microsystems Laboratories)]
2735 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
2736 through methods ('mul', 'precompute_mult').
2738 The generic implementations (now internally called 'ec_wNAF_mul'
2739 and 'ec_wNAF_precomputed_mult') remain the default if these
2740 methods are undefined.
2742 [Sheueling Chang Shantz and Douglas Stebila
2743 (Sun Microsystems Laboratories)]
2745 *) New function EC_GROUP_get_degree, which is defined through
2746 EC_METHOD. For curves over prime fields, this returns the bit
2747 length of the modulus.
2749 [Sheueling Chang Shantz and Douglas Stebila
2750 (Sun Microsystems Laboratories)]
2752 *) New functions EC_GROUP_dup, EC_POINT_dup.
2753 (These simply call ..._new and ..._copy).
2755 [Sheueling Chang Shantz and Douglas Stebila
2756 (Sun Microsystems Laboratories)]
2758 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
2759 Polynomials are represented as BIGNUMs (where the sign bit is not
2760 used) in the following functions [macros]:
2763 BN_GF2m_sub [= BN_GF2m_add]
2764 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
2765 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
2766 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
2768 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
2769 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
2770 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
2771 BN_GF2m_cmp [= BN_ucmp]
2773 (Note that only the 'mod' functions are actually for fields GF(2^m).
2774 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
2776 For some functions, an the irreducible polynomial defining a
2777 field can be given as an 'unsigned int[]' with strictly
2778 decreasing elements giving the indices of those bits that are set;
2779 i.e., p[] represents the polynomial
2780 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
2782 p[0] > p[1] > ... > p[k] = 0.
2783 This applies to the following functions:
2788 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
2789 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
2791 BN_GF2m_mod_sqrt_arr
2792 BN_GF2m_mod_solve_quad_arr
2796 Conversion can be performed by the following functions:
2801 bntest.c has additional tests for binary polynomial arithmetic.
2803 Two implementations for BN_GF2m_mod_div() are available.
2804 The default algorithm simply uses BN_GF2m_mod_inv() and
2805 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
2806 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
2807 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
2809 [Sheueling Chang Shantz and Douglas Stebila
2810 (Sun Microsystems Laboratories)]
2812 *) Add new error code 'ERR_R_DISABLED' that can be used when some
2813 functionality is disabled at compile-time.
2814 [Douglas Stebila <douglas.stebila@sun.com>]
2816 *) Change default behaviour of 'openssl asn1parse' so that more
2817 information is visible when viewing, e.g., a certificate:
2819 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
2820 mode the content of non-printable OCTET STRINGs is output in a
2821 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
2822 avoid the appearance of a printable string.
2823 [Nils Larsch <nla@trustcenter.de>]
2825 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
2827 EC_GROUP_set_asn1_flag()
2828 EC_GROUP_get_asn1_flag()
2829 EC_GROUP_set_point_conversion_form()
2830 EC_GROUP_get_point_conversion_form()
2831 These control ASN1 encoding details:
2832 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
2833 has been set to OPENSSL_EC_NAMED_CURVE.
2834 - Points are encoded in uncompressed form by default; options for
2835 asn1_for are as for point2oct, namely
2836 POINT_CONVERSION_COMPRESSED
2837 POINT_CONVERSION_UNCOMPRESSED
2838 POINT_CONVERSION_HYBRID
2840 Also add 'seed' and 'seed_len' members to EC_GROUP with access
2843 EC_GROUP_get0_seed()
2844 EC_GROUP_get_seed_len()
2845 This is used only for ASN1 purposes (so far).
2846 [Nils Larsch <nla@trustcenter.de>]
2848 *) Add 'field_type' member to EC_METHOD, which holds the NID
2849 of the appropriate field type OID. The new function
2850 EC_METHOD_get_field_type() returns this value.
2851 [Nils Larsch <nla@trustcenter.de>]
2856 EC_POINT_point2hex()
2857 EC_POINT_hex2point()
2858 providing useful interfaces to EC_POINT_point2oct() and
2859 EC_POINT_oct2point().
2860 [Nils Larsch <nla@trustcenter.de>]
2862 *) Change internals of the EC library so that the functions
2863 EC_GROUP_set_generator()
2864 EC_GROUP_get_generator()
2865 EC_GROUP_get_order()
2866 EC_GROUP_get_cofactor()
2867 are implemented directly in crypto/ec/ec_lib.c and not dispatched
2868 to methods, which would lead to unnecessary code duplication when
2869 adding different types of curves.
2870 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
2872 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
2873 arithmetic, and such that modified wNAFs are generated
2874 (which avoid length expansion in many cases).
2877 *) Add a function EC_GROUP_check_discriminant() (defined via
2878 EC_METHOD) that verifies that the curve discriminant is non-zero.
2880 Add a function EC_GROUP_check() that makes some sanity tests
2881 on a EC_GROUP, its generator and order. This includes
2882 EC_GROUP_check_discriminant().
2883 [Nils Larsch <nla@trustcenter.de>]
2885 *) Add ECDSA in new directory crypto/ecdsa/.
2887 Add applications 'openssl ecparam' and 'openssl ecdsa'
2888 (these are based on 'openssl dsaparam' and 'openssl dsa').
2890 ECDSA support is also included in various other files across the
2891 library. Most notably,
2892 - 'openssl req' now has a '-newkey ecdsa:file' option;
2893 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
2894 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
2895 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
2896 them suitable for ECDSA where domain parameters must be
2897 extracted before the specific public key;
2898 - ECDSA engine support has been added.
2899 [Nils Larsch <nla@trustcenter.de>]
2901 *) Include some named elliptic curves, and add OIDs from X9.62,
2902 SECG, and WAP/WTLS. Each curve can be obtained from the new
2904 EC_GROUP_new_by_curve_name(),
2905 and the list of available named curves can be obtained with
2906 EC_get_builtin_curves().
2907 Also add a 'curve_name' member to EC_GROUP objects, which can be
2909 EC_GROUP_set_curve_name()
2910 EC_GROUP_get_curve_name()
2911 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
2913 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
2914 was actually never needed) and in BN_mul(). The removal in BN_mul()
2915 required a small change in bn_mul_part_recursive() and the addition
2916 of the functions bn_cmp_part_words(), bn_sub_part_words() and
2917 bn_add_part_words(), which do the same thing as bn_cmp_words(),
2918 bn_sub_words() and bn_add_words() except they take arrays with
2922 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
2924 *) Cleanse PEM buffers before freeing them since they may contain
2926 [Benjamin Bennett <ben@psc.edu>]
2928 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2929 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2930 authentication-only ciphersuites.
2933 *) Since AES128 and AES256 share a single mask bit in the logic of
2934 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2935 kludge to work properly if AES128 is available and AES256 isn't.
2938 *) Expand security boundary to match 1.1.1 module.
2941 *) Remove redundant features: hash file source, editing of test vectors
2942 modify fipsld to use external fips_premain.c signature.
2945 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
2946 run algorithm test programs.
2949 *) Make algorithm test programs more tolerant of whitespace.
2952 *) Have SSL/TLS server implementation tolerate "mismatched" record
2953 protocol version while receiving ClientHello even if the
2954 ClientHello is fragmented. (The server can't insist on the
2955 particular protocol version it has chosen before the ServerHello
2956 message has informed the client about his choice.)
2959 *) Load error codes if they are not already present instead of using a
2960 static variable. This allows them to be cleanly unloaded and reloaded.
2963 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
2965 *) Introduce limits to prevent malicious keys being able to
2966 cause a denial of service. (CVE-2006-2940)
2967 [Steve Henson, Bodo Moeller]
2969 *) Fix ASN.1 parsing of certain invalid structures that can result
2970 in a denial of service. (CVE-2006-2937) [Steve Henson]
2972 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2973 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2975 *) Fix SSL client code which could crash if connecting to a
2976 malicious SSLv2 server. (CVE-2006-4343)
2977 [Tavis Ormandy and Will Drewry, Google Security Team]
2979 *) Change ciphersuite string processing so that an explicit
2980 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
2981 will no longer include "AES128-SHA"), and any other similar
2982 ciphersuite (same bitmap) from *other* protocol versions (so that
2983 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
2984 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
2985 changes from 0.9.8b and 0.9.8d.
2988 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
2990 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2991 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2993 *) Change the Unix randomness entropy gathering to use poll() when
2994 possible instead of select(), since the latter has some
2995 undesirable limitations.
2996 [Darryl Miles via Richard Levitte and Bodo Moeller]
2998 *) Disable rogue ciphersuites:
3000 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
3001 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
3002 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
3004 The latter two were purportedly from
3005 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
3008 Also deactive the remaining ciphersuites from
3009 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
3010 unofficial, and the ID has long expired.
3013 *) Fix RSA blinding Heisenbug (problems sometimes occured on
3014 dual-core machines) and other potential thread-safety issues.
3017 Changes between 0.9.7i and 0.9.7j [04 May 2006]
3019 *) Adapt fipsld and the build system to link against the validated FIPS
3020 module in FIPS mode.
3023 *) Fixes for VC++ 2005 build under Windows.
3026 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
3027 from a Windows bash shell such as MSYS. It is autodetected from the
3028 "config" script when run from a VC++ environment. Modify standard VC++
3029 build to use fipscanister.o from the GNU make build.
3032 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
3034 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
3035 The value now differs depending on if you build for FIPS or not.
3036 BEWARE! A program linked with a shared FIPSed libcrypto can't be
3037 safely run with a non-FIPSed libcrypto, as it may crash because of
3038 the difference induced by this change.
3041 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
3043 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
3044 (part of SSL_OP_ALL). This option used to disable the
3045 countermeasure against man-in-the-middle protocol-version
3046 rollback in the SSL 2.0 server implementation, which is a bad
3047 idea. (CVE-2005-2969)
3049 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
3050 for Information Security, National Institute of Advanced Industrial
3051 Science and Technology [AIST], Japan)]
3053 *) Minimal support for X9.31 signatures and PSS padding modes. This is
3054 mainly for FIPS compliance and not fully integrated at this stage.
3057 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
3058 the exponentiation using a fixed-length exponent. (Otherwise,
3059 the information leaked through timing could expose the secret key
3060 after many signatures; cf. Bleichenbacher's attack on DSA with
3064 *) Make a new fixed-window mod_exp implementation the default for
3065 RSA, DSA, and DH private-key operations so that the sequence of
3066 squares and multiplies and the memory access pattern are
3067 independent of the particular secret key. This will mitigate
3068 cache-timing and potential related attacks.
3070 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
3071 and this is automatically used by BN_mod_exp_mont() if the new flag
3072 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
3073 will use this BN flag for private exponents unless the flag
3074 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
3075 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
3077 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
3079 *) Change the client implementation for SSLv23_method() and
3080 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
3081 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
3082 (Previously, the SSL 2.0 backwards compatible Client Hello
3083 message format would be used even with SSL_OP_NO_SSLv2.)
3086 *) Add support for smime-type MIME parameter in S/MIME messages which some
3090 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
3091 a threadsafe manner. Modify rsa code to use new function and add calls
3092 to dsa and dh code (which had race conditions before).
3095 *) Include the fixed error library code in the C error file definitions
3096 instead of fixing them up at runtime. This keeps the error code
3097 structures constant.
3100 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
3102 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
3105 *) Fixes for newer kerberos headers. NB: the casts are needed because
3106 the 'length' field is signed on one version and unsigned on another
3107 with no (?) obvious way to tell the difference, without these VC++
3108 complains. Also the "definition" of FAR (blank) is no longer included
3109 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
3110 some needed definitions.
3113 *) Undo Cygwin change.
3116 *) Added support for proxy certificates according to RFC 3820.
3117 Because they may be a security thread to unaware applications,
3118 they must be explicitely allowed in run-time. See
3119 docs/HOWTO/proxy_certificates.txt for further information.
3122 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
3124 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
3125 server and client random values. Previously
3126 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
3127 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
3129 This change has negligible security impact because:
3131 1. Server and client random values still have 24 bytes of pseudo random
3134 2. Server and client random values are sent in the clear in the initial
3137 3. The master secret is derived using the premaster secret (48 bytes in
3138 size for static RSA ciphersuites) as well as client server and random
3141 The OpenSSL team would like to thank the UK NISCC for bringing this issue
3144 [Stephen Henson, reported by UK NISCC]
3146 *) Use Windows randomness collection on Cygwin.
3149 *) Fix hang in EGD/PRNGD query when communication socket is closed
3150 prematurely by EGD/PRNGD.
3151 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
3153 *) Prompt for pass phrases when appropriate for PKCS12 input format.
3156 *) Back-port of selected performance improvements from development
3157 branch, as well as improved support for PowerPC platforms.
3160 *) Add lots of checks for memory allocation failure, error codes to indicate
3161 failure and freeing up memory if a failure occurs.
3162 [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
3164 *) Add new -passin argument to dgst.
3167 *) Perform some character comparisons of different types in X509_NAME_cmp:
3168 this is needed for some certificates that reencode DNs into UTF8Strings
3169 (in violation of RFC3280) and can't or wont issue name rollover
3173 *) Make an explicit check during certificate validation to see that
3174 the CA setting in each certificate on the chain is correct. As a
3175 side effect always do the following basic checks on extensions,
3176 not just when there's an associated purpose to the check:
3178 - if there is an unhandled critical extension (unless the user
3179 has chosen to ignore this fault)
3180 - if the path length has been exceeded (if one is set at all)
3181 - that certain extensions fit the associated purpose (if one has
3185 Changes between 0.9.7d and 0.9.7e [25 Oct 2004]
3187 *) Avoid a race condition when CRLs are checked in a multi threaded
3188 environment. This would happen due to the reordering of the revoked
3189 entries during signature checking and serial number lookup. Now the
3190 encoding is cached and the serial number sort performed under a lock.
3191 Add new STACK function sk_is_sorted().
3194 *) Add Delta CRL to the extension code.
3197 *) Various fixes to s3_pkt.c so alerts are sent properly.
3198 [David Holmes <d.holmes@f5.com>]
3200 *) Reduce the chances of duplicate issuer name and serial numbers (in
3201 violation of RFC3280) using the OpenSSL certificate creation utilities.
3202 This is done by creating a random 64 bit value for the initial serial
3203 number when a serial number file is created or when a self signed
3204 certificate is created using 'openssl req -x509'. The initial serial
3205 number file is created using 'openssl x509 -next_serial' in CA.pl
3206 rather than being initialized to 1.
3209 Changes between 0.9.7c and 0.9.7d [17 Mar 2004]
3211 *) Fix null-pointer assignment in do_change_cipher_spec() revealed
3212 by using the Codenomicon TLS Test Tool (CVE-2004-0079)
3213 [Joe Orton, Steve Henson]
3215 *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
3217 [Joe Orton, Steve Henson]
3219 *) Make it possible to have multiple active certificates with the same
3220 subject in the CA index file. This is done only if the keyword
3221 'unique_subject' is set to 'no' in the main CA section (default
3222 if 'CA_default') of the configuration file. The value is saved
3223 with the database itself in a separate index attribute file,
3224 named like the index file with '.attr' appended to the name.
3227 *) X509 verify fixes. Disable broken certificate workarounds when
3228 X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
3229 keyUsage extension present. Don't accept CRLs with unhandled critical
3230 extensions: since verify currently doesn't process CRL extensions this
3231 rejects a CRL with *any* critical extensions. Add new verify error codes
3235 *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
3236 A clarification of RFC2560 will require the use of OCTET STRINGs and
3237 some implementations cannot handle the current raw format. Since OpenSSL
3238 copies and compares OCSP nonces as opaque blobs without any attempt at
3239 parsing them this should not create any compatibility issues.
3242 *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
3243 calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
3244 this HMAC (and other) operations are several times slower than OpenSSL
3248 *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
3249 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3251 *) Use the correct content when signing type "other".
3254 Changes between 0.9.7b and 0.9.7c [30 Sep 2003]
3256 *) Fix various bugs revealed by running the NISCC test suite:
3258 Stop out of bounds reads in the ASN1 code when presented with
3259 invalid tags (CVE-2003-0543 and CVE-2003-0544).
3261 Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
3263 If verify callback ignores invalid public key errors don't try to check
3264 certificate signature with the NULL public key.
3268 *) New -ignore_err option in ocsp application to stop the server
3269 exiting on the first error in a request.
3272 *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
3273 if the server requested one: as stated in TLS 1.0 and SSL 3.0
3277 *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
3278 extra data after the compression methods not only for TLS 1.0
3279 but also for SSL 3.0 (as required by the specification).
3280 [Bodo Moeller; problem pointed out by Matthias Loepfe]
3282 *) Change X509_certificate_type() to mark the key as exported/exportable
3283 when it's 512 *bits* long, not 512 bytes.
3286 *) Change AES_cbc_encrypt() so it outputs exact multiple of
3287 blocks during encryption.
3290 *) Various fixes to base64 BIO and non blocking I/O. On write
3291 flushes were not handled properly if the BIO retried. On read
3292 data was not being buffered properly and had various logic bugs.
3293 This also affects blocking I/O when the data being decoded is a
3297 *) Various S/MIME bugfixes and compatibility changes:
3298 output correct application/pkcs7 MIME type if
3299 PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
3300 Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
3301 of files as .eml work). Correctly handle very long lines in MIME
3305 Changes between 0.9.7a and 0.9.7b [10 Apr 2003]
3307 *) Countermeasure against the Klima-Pokorny-Rosa extension of
3308 Bleichbacher's attack on PKCS #1 v1.5 padding: treat
3309 a protocol version number mismatch like a decryption error
3310 in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
3313 *) Turn on RSA blinding by default in the default implementation
3314 to avoid a timing attack. Applications that don't want it can call
3315 RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
3316 They would be ill-advised to do so in most cases.
3317 [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
3319 *) Change RSA blinding code so that it works when the PRNG is not
3320 seeded (in this case, the secret RSA exponent is abused as
3321 an unpredictable seed -- if it is not unpredictable, there
3322 is no point in blinding anyway). Make RSA blinding thread-safe
3323 by remembering the creator's thread ID in rsa->blinding and
3324 having all other threads use local one-time blinding factors
3325 (this requires more computation than sharing rsa->blinding, but
3326 avoids excessive locking; and if an RSA object is not shared
3327 between threads, blinding will still be very fast).
3330 *) Fixed a typo bug that would cause ENGINE_set_default() to set an
3331 ENGINE as defaults for all supported algorithms irrespective of
3332 the 'flags' parameter. 'flags' is now honoured, so applications
3333 should make sure they are passing it correctly.
3336 *) Target "mingw" now allows native Windows code to be generated in
3337 the Cygwin environment as well as with the MinGW compiler.
3340 Changes between 0.9.7 and 0.9.7a [19 Feb 2003]
3342 *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
3343 via timing by performing a MAC computation even if incorrrect
3344 block cipher padding has been found. This is a countermeasure
3345 against active attacks where the attacker has to distinguish
3346 between bad padding and a MAC verification error. (CVE-2003-0078)
3348 [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
3349 Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
3350 Martin Vuagnoux (EPFL, Ilion)]
3352 *) Make the no-err option work as intended. The intention with no-err
3353 is not to have the whole error stack handling routines removed from
3354 libcrypto, it's only intended to remove all the function name and
3355 reason texts, thereby removing some of the footprint that may not
3356 be interesting if those errors aren't displayed anyway.
3358 NOTE: it's still possible for any application or module to have it's
3359 own set of error texts inserted. The routines are there, just not
3360 used by default when no-err is given.
3363 *) Add support for FreeBSD on IA64.
3364 [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
3366 *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
3367 Kerberos function mit_des_cbc_cksum(). Before this change,
3368 the value returned by DES_cbc_cksum() was like the one from
3369 mit_des_cbc_cksum(), except the bytes were swapped.
3370 [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
3372 *) Allow an application to disable the automatic SSL chain building.
3373 Before this a rather primitive chain build was always performed in
3374 ssl3_output_cert_chain(): an application had no way to send the
3375 correct chain if the automatic operation produced an incorrect result.
3377 Now the chain builder is disabled if either:
3379 1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
3381 2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
3383 The reasoning behind this is that an application would not want the
3384 auto chain building to take place if extra chain certificates are
3385 present and it might also want a means of sending no additional
3386 certificates (for example the chain has two certificates and the
3390 *) Add the possibility to build without the ENGINE framework.
3391 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3393 *) Under Win32 gmtime() can return NULL: check return value in
3394 OPENSSL_gmtime(). Add error code for case where gmtime() fails.
3397 *) DSA routines: under certain error conditions uninitialized BN objects
3398 could be freed. Solution: make sure initialization is performed early
3399 enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
3400 Nils Larsch <nla@trustcenter.de> via PR#459)
3403 *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
3404 checked on reconnect on the client side, therefore session resumption
3405 could still fail with a "ssl session id is different" error. This
3406 behaviour is masked when SSL_OP_ALL is used due to
3407 SSL_OP_MICROSOFT_SESS_ID_BUG being set.
3408 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3409 followup to PR #377.
3412 *) IA-32 assembler support enhancements: unified ELF targets, support
3413 for SCO/Caldera platforms, fix for Cygwin shared build.
3416 *) Add support for FreeBSD on sparc64. As a consequence, support for
3417 FreeBSD on non-x86 processors is separate from x86 processors on
3418 the config script, much like the NetBSD support.
3419 [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
3421 Changes between 0.9.6h and 0.9.7 [31 Dec 2002]
3423 [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
3426 *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
3427 code (06) was taken as the first octet of the session ID and the last
3428 octet was ignored consequently. As a result SSLv2 client side session
3429 caching could not have worked due to the session ID mismatch between
3431 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3435 *) Change the declaration of needed Kerberos libraries to use EX_LIBS
3436 instead of the special (and badly supported) LIBKRB5. LIBKRB5 is
3440 *) The hw_ncipher.c engine requires dynamic locks. Unfortunately, it
3441 seems that in spite of existing for more than a year, many application
3442 author have done nothing to provide the necessary callbacks, which
3443 means that this particular engine will not work properly anywhere.
3444 This is a very unfortunate situation which forces us, in the name
3445 of usability, to give the hw_ncipher.c a static lock, which is part
3447 NOTE: This is for the 0.9.7 series ONLY. This hack will never
3448 appear in 0.9.8 or later. We EXPECT application authors to have
3449 dealt properly with this when 0.9.8 is released (unless we actually
3450 make such changes in the libcrypto locking code that changes will
3451 have to be made anyway).
3454 *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
3455 octets have been read, EOF or an error occurs. Without this change
3456 some truncated ASN1 structures will not produce an error.
3459 *) Disable Heimdal support, since it hasn't been fully implemented.
3460 Still give the possibility to force the use of Heimdal, but with
3461 warnings and a request that patches get sent to openssl-dev.
3464 *) Add the VC-CE target, introduce the WINCE sysname, and add
3465 INSTALL.WCE and appropriate conditionals to make it build.
3466 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3468 *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
3469 cygssl-x.y.z.dll, where x, y and z are the major, minor and
3470 edit numbers of the version.
3471 [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
3473 *) Introduce safe string copy and catenation functions
3474 (BUF_strlcpy() and BUF_strlcat()).
3475 [Ben Laurie (CHATS) and Richard Levitte]
3477 *) Avoid using fixed-size buffers for one-line DNs.
3478 [Ben Laurie (CHATS)]
3480 *) Add BUF_MEM_grow_clean() to avoid information leakage when
3481 resizing buffers containing secrets, and use where appropriate.
3482 [Ben Laurie (CHATS)]
3484 *) Avoid using fixed size buffers for configuration file location.
3485 [Ben Laurie (CHATS)]
3487 *) Avoid filename truncation for various CA files.
3488 [Ben Laurie (CHATS)]
3490 *) Use sizeof in preference to magic numbers.
3491 [Ben Laurie (CHATS)]
3493 *) Avoid filename truncation in cert requests.
3494 [Ben Laurie (CHATS)]
3496 *) Add assertions to check for (supposedly impossible) buffer
3498 [Ben Laurie (CHATS)]
3500 *) Don't cache truncated DNS entries in the local cache (this could
3501 potentially lead to a spoofing attack).
3502 [Ben Laurie (CHATS)]
3504 *) Fix various buffers to be large enough for hex/decimal
3505 representations in a platform independent manner.
3506 [Ben Laurie (CHATS)]
3508 *) Add CRYPTO_realloc_clean() to avoid information leakage when
3509 resizing buffers containing secrets, and use where appropriate.
3510 [Ben Laurie (CHATS)]
3512 *) Add BIO_indent() to avoid much slightly worrying code to do
3514 [Ben Laurie (CHATS)]
3516 *) Convert sprintf()/BIO_puts() to BIO_printf().
3517 [Ben Laurie (CHATS)]
3519 *) buffer_gets() could terminate with the buffer only half
3521 [Ben Laurie (CHATS)]
3523 *) Add assertions to prevent user-supplied crypto functions from
3524 overflowing internal buffers by having large block sizes, etc.
3525 [Ben Laurie (CHATS)]
3527 *) New OPENSSL_assert() macro (similar to assert(), but enabled
3529 [Ben Laurie (CHATS)]
3531 *) Eliminate unused copy of key in RC4.
3532 [Ben Laurie (CHATS)]
3534 *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
3535 [Ben Laurie (CHATS)]
3537 *) Fix off-by-one error in EGD path.
3538 [Ben Laurie (CHATS)]
3540 *) If RANDFILE path is too long, ignore instead of truncating.
3541 [Ben Laurie (CHATS)]
3543 *) Eliminate unused and incorrectly sized X.509 structure
3545 [Ben Laurie (CHATS)]
3547 *) Eliminate unused and dangerous function knumber().
3548 [Ben Laurie (CHATS)]
3550 *) Eliminate unused and dangerous structure, KSSL_ERR.
3551 [Ben Laurie (CHATS)]
3553 *) Protect against overlong session ID context length in an encoded
3554 session object. Since these are local, this does not appear to be
3556 [Ben Laurie (CHATS)]
3558 *) Change from security patch (see 0.9.6e below) that did not affect
3559 the 0.9.6 release series:
3561 Remote buffer overflow in SSL3 protocol - an attacker could
3562 supply an oversized master key in Kerberos-enabled versions.
3564 [Ben Laurie (CHATS)]
3566 *) Change the SSL kerb5 codes to match RFC 2712.
3569 *) Make -nameopt work fully for req and add -reqopt switch.
3570 [Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]
3572 *) The "block size" for block ciphers in CFB and OFB mode should be 1.
3573 [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]
3575 *) Make sure tests can be performed even if the corresponding algorithms
3576 have been removed entirely. This was also the last step to make
3577 OpenSSL compilable with DJGPP under all reasonable conditions.
3578 [Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
3580 *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
3581 to allow version independent disabling of normally unselected ciphers,
3582 which may be activated as a side-effect of selecting a single cipher.
3584 (E.g., cipher list string "RSA" enables ciphersuites that are left
3585 out of "ALL" because they do not provide symmetric encryption.
3586 "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
3587 [Lutz Jaenicke, Bodo Moeller]
3589 *) Add appropriate support for separate platform-dependent build
3590 directories. The recommended way to make a platform-dependent
3591 build directory is the following (tested on Linux), maybe with
3594 # Place yourself outside of the OpenSSL source tree. In
3595 # this example, the environment variable OPENSSL_SOURCE
3596 # is assumed to contain the absolute OpenSSL source directory.
3597 mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
3598 cd objtree/"`uname -s`-`uname -r`-`uname -m`"
3599 (cd $OPENSSL_SOURCE; find . -type f) | while read F; do
3600 mkdir -p `dirname $F`
3601 ln -s $OPENSSL_SOURCE/$F $F
3604 To be absolutely sure not to disturb the source tree, a "make clean"
3605 is a good thing. If it isn't successfull, don't worry about it,
3606 it probably means the source directory is very clean.
3609 *) Make sure any ENGINE control commands make local copies of string
3610 pointers passed to them whenever necessary. Otherwise it is possible
3611 the caller may have overwritten (or deallocated) the original string
3612 data when a later ENGINE operation tries to use the stored values.
3613 [Götz Babin-Ebell <babinebell@trustcenter.de>]
3615 *) Improve diagnostics in file reading and command-line digests.
3616 [Ben Laurie aided and abetted by Solar Designer <solar@openwall.com>]
3618 *) Add AES modes CFB and OFB to the object database. Correct an
3619 error in AES-CFB decryption.
3622 *) Remove most calls to EVP_CIPHER_CTX_cleanup() in evp_enc.c, this
3623 allows existing EVP_CIPHER_CTX structures to be reused after
3624 calling EVP_*Final(). This behaviour is used by encryption
3625 BIOs and some applications. This has the side effect that
3626 applications must explicitly clean up cipher contexts with
3627 EVP_CIPHER_CTX_cleanup() or they will leak memory.
3630 *) Check the values of dna and dnb in bn_mul_recursive before calling
3631 bn_mul_comba (a non zero value means the a or b arrays do not contain
3632 n2 elements) and fallback to bn_mul_normal if either is not zero.
3635 *) Fix escaping of non-ASCII characters when using the -subj option
3636 of the "openssl req" command line tool. (Robert Joop <joop@fokus.gmd.de>)
3639 *) Make object definitions compliant to LDAP (RFC2256): SN is the short
3640 form for "surname", serialNumber has no short form.
3641 Use "mail" as the short name for "rfc822Mailbox" according to RFC2798;
3642 therefore remove "mail" short name for "internet 7".
3643 The OID for unique identifiers in X509 certificates is
3644 x500UniqueIdentifier, not uniqueIdentifier.
3645 Some more OID additions. (Michael Bell <michael.bell@rz.hu-berlin.de>)
3648 *) Add an "init" command to the ENGINE config module and auto initialize
3649 ENGINEs. Without any "init" command the ENGINE will be initialized
3650 after all ctrl commands have been executed on it. If init=1 the
3651 ENGINE is initailized at that point (ctrls before that point are run
3652 on the uninitialized ENGINE and after on the initialized one). If
3653 init=0 then the ENGINE will not be iniatialized at all.
3656 *) Fix the 'app_verify_callback' interface so that the user-defined
3657 argument is actually passed to the callback: In the
3658 SSL_CTX_set_cert_verify_callback() prototype, the callback
3659 declaration has been changed from
3662 int (*cb)(X509_STORE_CTX *,void *);
3663 in ssl_verify_cert_chain (ssl/ssl_cert.c), the call
3664 i=s->ctx->app_verify_callback(&ctx)
3665 has been changed into
3666 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg).
3668 To update applications using SSL_CTX_set_cert_verify_callback(),
3669 a dummy argument can be added to their callback functions.
3670 [D. K. Smetters <smetters@parc.xerox.com>]
3672 *) Added the '4758cca' ENGINE to support IBM 4758 cards.
3673 [Maurice Gittens <maurice@gittens.nl>, touchups by Geoff Thorpe]
3675 *) Add and OPENSSL_LOAD_CONF define which will cause
3676 OpenSSL_add_all_algorithms() to load the openssl.cnf config file.
3677 This allows older applications to transparently support certain
3678 OpenSSL features: such as crypto acceleration and dynamic ENGINE loading.
3679 Two new functions OPENSSL_add_all_algorithms_noconf() which will never
3680 load the config file and OPENSSL_add_all_algorithms_conf() which will
3681 always load it have also been added.
3684 *) Add the OFB, CFB and CTR (all with 128 bit feedback) to AES.
3685 Adjust NIDs and EVP layer.
3686 [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]
3688 *) Config modules support in openssl utility.
3690 Most commands now load modules from the config file,
3691 though in a few (such as version) this isn't done
3692 because it couldn't be used for anything.
3694 In the case of ca and req the config file used is
3695 the same as the utility itself: that is the -config
3696 command line option can be used to specify an
3700 *) Move default behaviour from OPENSSL_config(). If appname is NULL
3701 use "openssl_conf" if filename is NULL use default openssl config file.
3704 *) Add an argument to OPENSSL_config() to allow the use of an alternative
3705 config section name. Add a new flag to tolerate a missing config file
3706 and move code to CONF_modules_load_file().
3709 *) Support for crypto accelerator cards from Accelerated Encryption
3710 Processing, www.aep.ie. (Use engine 'aep')
3711 The support was copied from 0.9.6c [engine] and adapted/corrected
3712 to work with the new engine framework.
3713 [AEP Inc. and Richard Levitte]
3715 *) Support for SureWare crypto accelerator cards from Baltimore
3716 Technologies. (Use engine 'sureware')
3717 The support was copied from 0.9.6c [engine] and adapted
3718 to work with the new engine framework.
3721 *) Have the CHIL engine fork-safe (as defined by nCipher) and actually
3722 make the newer ENGINE framework commands for the CHIL engine work.
3723 [Toomas Kiisk <vix@cyber.ee> and Richard Levitte]
3725 *) Make it possible to produce shared libraries on ReliantUNIX.
3726 [Robert Dahlem <Robert.Dahlem@ffm2.siemens.de> via Richard Levitte]
3728 *) Add the configuration target debug-linux-ppro.
3729 Make 'openssl rsa' use the general key loading routines
3730 implemented in apps.c, and make those routines able to
3731 handle the key format FORMAT_NETSCAPE and the variant
3733 [Toomas Kiisk <vix@cyber.ee> via Richard Levitte]
3735 *) Fix a crashbug and a logic bug in hwcrhk_load_pubkey().
3736 [Toomas Kiisk <vix@cyber.ee> via Richard Levitte]
3738 *) Add -keyform to rsautl, and document -engine.
3739 [Richard Levitte, inspired by Toomas Kiisk <vix@cyber.ee>]
3741 *) Change BIO_new_file (crypto/bio/bss_file.c) to use new
3742 BIO_R_NO_SUCH_FILE error code rather than the generic
3743 ERR_R_SYS_LIB error code if fopen() fails with ENOENT.
3746 *) Add new functions
3748 ERR_peek_last_error_line
3749 ERR_peek_last_error_line_data.
3750 These are similar to
3753 ERR_peek_error_line_data,
3754 but report on the latest error recorded rather than the first one
3755 still in the error queue.
3756 [Ben Laurie, Bodo Moeller]
3758 *) default_algorithms option in ENGINE config module. This allows things
3760 default_algorithms = ALL
3761 default_algorithms = RSA, DSA, RAND, CIPHERS, DIGESTS
3764 *) Prelminary ENGINE config module.
3767 *) New experimental application configuration code.
3770 *) Change the AES code to follow the same name structure as all other
3771 symmetric ciphers, and behave the same way. Move everything to
3772 the directory crypto/aes, thereby obsoleting crypto/rijndael.
3773 [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]
3775 *) SECURITY: remove unsafe setjmp/signal interaction from ui_openssl.c.
3776 [Ben Laurie and Theo de Raadt]
3778 *) Add option to output public keys in req command.
3779 [Massimiliano Pala madwolf@openca.org]
3781 *) Use wNAFs in EC_POINTs_mul() for improved efficiency
3782 (up to about 10% better than before for P-192 and P-224).
3785 *) New functions/macros
3787 SSL_CTX_set_msg_callback(ctx, cb)
3788 SSL_CTX_set_msg_callback_arg(ctx, arg)
3789 SSL_set_msg_callback(ssl, cb)
3790 SSL_set_msg_callback_arg(ssl, arg)
3792 to request calling a callback function
3794 void cb(int write_p, int version, int content_type,
3795 const void *buf, size_t len, SSL *ssl, void *arg)
3797 whenever a protocol message has been completely received
3798 (write_p == 0) or sent (write_p == 1). Here 'version' is the
3799 protocol version according to which the SSL library interprets
3800 the current protocol message (SSL2_VERSION, SSL3_VERSION, or
3801 TLS1_VERSION). 'content_type' is 0 in the case of SSL 2.0, or
3802 the content type as defined in the SSL 3.0/TLS 1.0 protocol
3803 specification (change_cipher_spec(20), alert(21), handshake(22)).
3804 'buf' and 'len' point to the actual message, 'ssl' to the
3805 SSL object, and 'arg' is the application-defined value set by
3806 SSL[_CTX]_set_msg_callback_arg().
3808 'openssl s_client' and 'openssl s_server' have new '-msg' options
3809 to enable a callback that displays all protocol messages.
3812 *) Change the shared library support so shared libraries are built as
3813 soon as the corresponding static library is finished, and thereby get
3814 openssl and the test programs linked against the shared library.
3815 This still only happens when the keyword "shard" has been given to
3816 the configuration scripts.
3818 NOTE: shared library support is still an experimental thing, and
3819 backward binary compatibility is still not guaranteed.
3820 ["Maciej W. Rozycki" <macro@ds2.pg.gda.pl> and Richard Levitte]
3822 *) Add support for Subject Information Access extension.
3823 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3825 *) Make BUF_MEM_grow() behaviour more consistent: Initialise to zero
3826 additional bytes when new memory had to be allocated, not just
3827 when reusing an existing buffer.
3830 *) New command line and configuration option 'utf8' for the req command.
3831 This allows field values to be specified as UTF8 strings.
3834 *) Add -multi and -mr options to "openssl speed" - giving multiple parallel
3835 runs for the former and machine-readable output for the latter.
3838 *) Add '-noemailDN' option to 'openssl ca'. This prevents inclusion
3839 of the e-mail address in the DN (i.e., it will go into a certificate
3840 extension only). The new configuration file option 'email_in_dn = no'
3841 has the same effect.
3842 [Massimiliano Pala madwolf@openca.org]
3844 *) Change all functions with names starting with des_ to be starting
3845 with DES_ instead. Add wrappers that are compatible with libdes,
3846 but are named _ossl_old_des_*. Finally, add macros that map the
3847 des_* symbols to the corresponding _ossl_old_des_* if libdes
3848 compatibility is desired. If OpenSSL 0.9.6c compatibility is
3849 desired, the des_* symbols will be mapped to DES_*, with one
3852 Since we provide two compatibility mappings, the user needs to
3853 define the macro OPENSSL_DES_LIBDES_COMPATIBILITY if libdes
3854 compatibility is desired. The default (i.e., when that macro
3855 isn't defined) is OpenSSL 0.9.6c compatibility.
3857 There are also macros that enable and disable the support of old
3858 des functions altogether. Those are OPENSSL_ENABLE_OLD_DES_SUPPORT
3859 and OPENSSL_DISABLE_OLD_DES_SUPPORT. If none or both of those
3860 are defined, the default will apply: to support the old des routines.
3862 In either case, one must include openssl/des.h to get the correct
3863 definitions. Do not try to just include openssl/des_old.h, that
3866 NOTE: This is a major break of an old API into a new one. Software
3867 authors are encouraged to switch to the DES_ style functions. Some
3868 time in the future, des_old.h and the libdes compatibility functions
3869 will be disable (i.e. OPENSSL_DISABLE_OLD_DES_SUPPORT will be the
3870 default), and then completely removed.
3873 *) Test for certificates which contain unsupported critical extensions.
3874 If such a certificate is found during a verify operation it is
3875 rejected by default: this behaviour can be overridden by either
3876 handling the new error X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION or
3877 by setting the verify flag X509_V_FLAG_IGNORE_CRITICAL. A new function
3878 X509_supported_extension() has also been added which returns 1 if a
3879 particular extension is supported.
3882 *) Modify the behaviour of EVP cipher functions in similar way to digests
3883 to retain compatibility with existing code.
3886 *) Modify the behaviour of EVP_DigestInit() and EVP_DigestFinal() to retain
3887 compatibility with existing code. In particular the 'ctx' parameter does
3888 not have to be to be initialized before the call to EVP_DigestInit() and
3889 it is tidied up after a call to EVP_DigestFinal(). New function
3890 EVP_DigestFinal_ex() which does not tidy up the ctx. Similarly function
3891 EVP_MD_CTX_copy() changed to not require the destination to be
3892 initialized valid and new function EVP_MD_CTX_copy_ex() added which
3893 requires the destination to be valid.
3895 Modify all the OpenSSL digest calls to use EVP_DigestInit_ex(),
3896 EVP_DigestFinal_ex() and EVP_MD_CTX_copy_ex().
3899 *) Change ssl3_get_message (ssl/s3_both.c) and the functions using it
3900 so that complete 'Handshake' protocol structures are kept in memory
3901 instead of overwriting 'msg_type' and 'length' with 'body' data.
3904 *) Add an implementation of SSL_add_dir_cert_subjects_to_stack for Win32.
3905 [Massimo Santin via Richard Levitte]
3907 *) Major restructuring to the underlying ENGINE code. This includes
3908 reduction of linker bloat, separation of pure "ENGINE" manipulation
3909 (initialisation, etc) from functionality dealing with implementations
3910 of specific crypto iterfaces. This change also introduces integrated
3911 support for symmetric ciphers and digest implementations - so ENGINEs
3912 can now accelerate these by providing EVP_CIPHER and EVP_MD
3913 implementations of their own. This is detailed in crypto/engine/README
3914 as it couldn't be adequately described here. However, there are a few
3915 API changes worth noting - some RSA, DSA, DH, and RAND functions that
3916 were changed in the original introduction of ENGINE code have now
3917 reverted back - the hooking from this code to ENGINE is now a good
3918 deal more passive and at run-time, operations deal directly with
3919 RSA_METHODs, DSA_METHODs (etc) as they did before, rather than
3920 dereferencing through an ENGINE pointer any more. Also, the ENGINE
3921 functions dealing with BN_MOD_EXP[_CRT] handlers have been removed -
3922 they were not being used by the framework as there is no concept of a
3923 BIGNUM_METHOD and they could not be generalised to the new
3924 'ENGINE_TABLE' mechanism that underlies the new code. Similarly,
3925 ENGINE_cpy() has been removed as it cannot be consistently defined in
3929 *) Change ASN1_GENERALIZEDTIME_check() to allow fractional seconds.
3932 *) Change mkdef.pl to sort symbols that get the same entry number,
3933 and make sure the automatically generated functions ERR_load_*
3934 become part of libeay.num as well.
3937 *) New function SSL_renegotiate_pending(). This returns true once
3938 renegotiation has been requested (either SSL_renegotiate() call
3939 or HelloRequest/ClientHello receveived from the peer) and becomes
3940 false once a handshake has been completed.
3941 (For servers, SSL_renegotiate() followed by SSL_do_handshake()
3942 sends a HelloRequest, but does not ensure that a handshake takes
3943 place. SSL_renegotiate_pending() is useful for checking if the
3944 client has followed the request.)
3947 *) New SSL option SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION.
3948 By default, clients may request session resumption even during
3949 renegotiation (if session ID contexts permit); with this option,
3950 session resumption is possible only in the first handshake.
3952 SSL_OP_ALL is now 0x00000FFFL instead of 0x000FFFFFL. This makes
3953 more bits available for options that should not be part of
3954 SSL_OP_ALL (such as SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION).
3957 *) Add some demos for certificate and certificate request creation.
3960 *) Make maximum certificate chain size accepted from the peer application
3961 settable (SSL*_get/set_max_cert_list()), as proposed by
3962 "Douglas E. Engert" <deengert@anl.gov>.
3965 *) Add support for shared libraries for Unixware-7
3966 (Boyd Lynn Gerber <gerberb@zenez.com>).
3969 *) Add a "destroy" handler to ENGINEs that allows structural cleanup to
3970 be done prior to destruction. Use this to unload error strings from
3971 ENGINEs that load their own error strings. NB: This adds two new API
3972 functions to "get" and "set" this destroy handler in an ENGINE.
3975 *) Alter all existing ENGINE implementations (except "openssl" and
3976 "openbsd") to dynamically instantiate their own error strings. This
3977 makes them more flexible to be built both as statically-linked ENGINEs
3978 and self-contained shared-libraries loadable via the "dynamic" ENGINE.
3979 Also, add stub code to each that makes building them as self-contained
3980 shared-libraries easier (see README.ENGINE).
3983 *) Add a "dynamic" ENGINE that provides a mechanism for binding ENGINE
3984 implementations into applications that are completely implemented in
3985 self-contained shared-libraries. The "dynamic" ENGINE exposes control
3986 commands that can be used to configure what shared-library to load and
3987 to control aspects of the way it is handled. Also, made an update to
3988 the README.ENGINE file that brings its information up-to-date and
3989 provides some information and instructions on the "dynamic" ENGINE
3990 (ie. how to use it, how to build "dynamic"-loadable ENGINEs, etc).
3993 *) Make it possible to unload ranges of ERR strings with a new
3994 "ERR_unload_strings" function.
3997 *) Add a copy() function to EVP_MD.
4000 *) Make EVP_MD routines take a context pointer instead of just the
4001 md_data void pointer.
4004 *) Add flags to EVP_MD and EVP_MD_CTX. EVP_MD_FLAG_ONESHOT indicates
4005 that the digest can only process a single chunk of data
4006 (typically because it is provided by a piece of
4007 hardware). EVP_MD_CTX_FLAG_ONESHOT indicates that the application
4008 is only going to provide a single chunk of data, and hence the
4009 framework needn't accumulate the data for oneshot drivers.
4012 *) As with "ERR", make it possible to replace the underlying "ex_data"
4013 functions. This change also alters the storage and management of global
4014 ex_data state - it's now all inside ex_data.c and all "class" code (eg.
4015 RSA, BIO, SSL_CTX, etc) no longer stores its own STACKS and per-class
4016 index counters. The API functions that use this state have been changed
4017 to take a "class_index" rather than pointers to the class's local STACK
4018 and counter, and there is now an API function to dynamically create new
4019 classes. This centralisation allows us to (a) plug a lot of the
4020 thread-safety problems that existed, and (b) makes it possible to clean
4021 up all allocated state using "CRYPTO_cleanup_all_ex_data()". W.r.t. (b)
4022 such data would previously have always leaked in application code and
4023 workarounds were in place to make the memory debugging turn a blind eye
4024 to it. Application code that doesn't use this new function will still
4025 leak as before, but their memory debugging output will announce it now
4026 rather than letting it slide.
4028 Besides the addition of CRYPTO_cleanup_all_ex_data(), another API change
4029 induced by the "ex_data" overhaul is that X509_STORE_CTX_init() now
4030 has a return value to indicate success or failure.
4033 *) Make it possible to replace the underlying "ERR" functions such that the
4034 global state (2 LHASH tables and 2 locks) is only used by the "default"
4035 implementation. This change also adds two functions to "get" and "set"
4036 the implementation prior to it being automatically set the first time
4037 any other ERR function takes place. Ie. an application can call "get",
4038 pass the return value to a module it has just loaded, and that module
4039 can call its own "set" function using that value. This means the
4040 module's "ERR" operations will use (and modify) the error state in the
4041 application and not in its own statically linked copy of OpenSSL code.
4044 *) Give DH, DSA, and RSA types their own "**_up_ref()" function to increment
4045 reference counts. This performs normal REF_PRINT/REF_CHECK macros on
4046 the operation, and provides a more encapsulated way for external code
4047 (crypto/evp/ and ssl/) to do this. Also changed the evp and ssl code
4048 to use these functions rather than manually incrementing the counts.
4050 Also rename "DSO_up()" function to more descriptive "DSO_up_ref()".
4053 *) Add EVP test program.
4056 *) Add symmetric cipher support to ENGINE. Expect the API to change!
4059 *) New CRL functions: X509_CRL_set_version(), X509_CRL_set_issuer_name()
4060 X509_CRL_set_lastUpdate(), X509_CRL_set_nextUpdate(), X509_CRL_sort(),
4061 X509_REVOKED_set_serialNumber(), and X509_REVOKED_set_revocationDate().
4062 These allow a CRL to be built without having to access X509_CRL fields
4063 directly. Modify 'ca' application to use new functions.
4066 *) Move SSL_OP_TLS_ROLLBACK_BUG out of the SSL_OP_ALL list of recommended
4067 bug workarounds. Rollback attack detection is a security feature.
4068 The problem will only arise on OpenSSL servers when TLSv1 is not
4069 available (sslv3_server_method() or SSL_OP_NO_TLSv1).
4070 Software authors not wanting to support TLSv1 will have special reasons
4071 for their choice and can explicitly enable this option.
4072 [Bodo Moeller, Lutz Jaenicke]
4074 *) Rationalise EVP so it can be extended: don't include a union of
4075 cipher/digest structures, add init/cleanup functions for EVP_MD_CTX
4076 (similar to those existing for EVP_CIPHER_CTX).
4081 EVP_MD_CTX_init(&md); /* new function call */
4082 EVP_DigestInit(&md, EVP_sha1());
4083 EVP_DigestUpdate(&md, in, len);
4084 EVP_DigestFinal(&md, out, NULL);
4085 EVP_MD_CTX_cleanup(&md); /* new function call */
4089 *) Make DES key schedule conform to the usual scheme, as well as
4090 correcting its structure. This means that calls to DES functions
4091 now have to pass a pointer to a des_key_schedule instead of a
4092 plain des_key_schedule (which was actually always a pointer
4095 des_key_schedule ks;
4097 des_set_key_checked(..., &ks);
4098 des_ncbc_encrypt(..., &ks, ...);
4100 (Note that a later change renames 'des_...' into 'DES_...'.)
4103 *) Initial reduction of linker bloat: the use of some functions, such as
4104 PEM causes large amounts of unused functions to be linked in due to
4105 poor organisation. For example pem_all.c contains every PEM function
4106 which has a knock on effect of linking in large amounts of (unused)
4107 ASN1 code. Grouping together similar functions and splitting unrelated
4108 functions prevents this.
4111 *) Cleanup of EVP macros.
4114 *) Change historical references to {NID,SN,LN}_des_ede and ede3 to add the
4115 correct _ecb suffix.
4118 *) Add initial OCSP responder support to ocsp application. The
4119 revocation information is handled using the text based index
4120 use by the ca application. The responder can either handle
4121 requests generated internally, supplied in files (for example
4122 via a CGI script) or using an internal minimal server.
4125 *) Add configuration choices to get zlib compression for TLS.
4128 *) Changes to Kerberos SSL for RFC 2712 compliance:
4129 1. Implemented real KerberosWrapper, instead of just using
4130 KRB5 AP_REQ message. [Thanks to Simon Wilkinson <sxw@sxw.org.uk>]
4131 2. Implemented optional authenticator field of KerberosWrapper.
4133 Added openssl-style ASN.1 macros for Kerberos ticket, ap_req,
4134 and authenticator structs; see crypto/krb5/.
4136 Generalized Kerberos calls to support multiple Kerberos libraries.
4137 [Vern Staats <staatsvr@asc.hpc.mil>,
4138 Jeffrey Altman <jaltman@columbia.edu>
4139 via Richard Levitte]
4141 *) Cause 'openssl speed' to use fully hard-coded DSA keys as it
4142 already does with RSA. testdsa.h now has 'priv_key/pub_key'
4143 values for each of the key sizes rather than having just
4144 parameters (and 'speed' generating keys each time).
4147 *) Speed up EVP routines.
4150 type 8 bytes 64 bytes 256 bytes 1024 bytes 8192 bytes
4151 des-cbc 4408.85k 5560.51k 5778.46k 5862.20k 5825.16k
4152 des-cbc 4389.55k 5571.17k 5792.23k 5846.91k 5832.11k
4153 des-cbc 4394.32k 5575.92k 5807.44k 5848.37k 5841.30k
4155 des-cbc 3482.66k 5069.49k 5496.39k 5614.16k 5639.28k
4156 des-cbc 3480.74k 5068.76k 5510.34k 5609.87k 5635.52k
4157 des-cbc 3483.72k 5067.62k 5504.60k 5708.01k 5724.80k
4160 des-cbc 4660.16k 5650.19k 5807.19k 5827.13k 5783.32k
4162 des-cbc 3624.96k 5258.21k 5530.91k 5624.30k 5628.26k
4165 *) Added the OS2-EMX target.
4166 ["Brian Havard" <brianh@kheldar.apana.org.au> and Richard Levitte]
4168 *) Rewrite apps to use NCONF routines instead of the old CONF. New functions
4169 to support NCONF routines in extension code. New function CONF_set_nconf()
4170 to allow functions which take an NCONF to also handle the old LHASH
4171 structure: this means that the old CONF compatible routines can be
4172 retained (in particular wrt extensions) without having to duplicate the
4173 code. New function X509V3_add_ext_nconf_sk to add extensions to a stack.
4176 *) Enhance the general user interface with mechanisms for inner control
4177 and with possibilities to have yes/no kind of prompts.
4180 *) Change all calls to low level digest routines in the library and
4181 applications to use EVP. Add missing calls to HMAC_cleanup() and
4182 don't assume HMAC_CTX can be copied using memcpy().
4183 [Verdon Walker <VWalker@novell.com>, Steve Henson]
4185 *) Add the possibility to control engines through control names but with
4186 arbitrary arguments instead of just a string.
4187 Change the key loaders to take a UI_METHOD instead of a callback
4188 function pointer. NOTE: this breaks binary compatibility with earlier
4189 versions of OpenSSL [engine].
4190 Adapt the nCipher code for these new conditions and add a card insertion
4194 *) Enhance the general user interface with mechanisms to better support
4195 dialog box interfaces, application-defined prompts, the possibility
4196 to use defaults (for example default passwords from somewhere else)
4197 and interrupts/cancellations.
4200 *) Tidy up PKCS#12 attribute handling. Add support for the CSP name
4201 attribute in PKCS#12 files, add new -CSP option to pkcs12 utility.
4204 *) Fix a memory leak in 'sk_dup()' in the case reallocation fails. (Also
4205 tidy up some unnecessarily weird code in 'sk_new()').
4206 [Geoff, reported by Diego Tartara <dtartara@novamens.com>]
4208 *) Change the key loading routines for ENGINEs to use the same kind
4209 callback (pem_password_cb) as all other routines that need this
4213 *) Increase ENTROPY_NEEDED to 32 bytes, as Rijndael can operate with
4214 256 bit (=32 byte) keys. Of course seeding with more entropy bytes
4215 than this minimum value is recommended.
4218 *) New random seeder for OpenVMS, using the system process statistics
4219 that are easily reachable.
4222 *) Windows apparently can't transparently handle global
4223 variables defined in DLLs. Initialisations such as:
4225 const ASN1_ITEM *it = &ASN1_INTEGER_it;
4227 wont compile. This is used by the any applications that need to
4228 declare their own ASN1 modules. This was fixed by adding the option
4229 EXPORT_VAR_AS_FN to all Win32 platforms, although this isn't strictly
4230 needed for static libraries under Win32.
4233 *) New functions X509_PURPOSE_set() and X509_TRUST_set() to handle
4234 setting of purpose and trust fields. New X509_STORE trust and
4235 purpose functions and tidy up setting in other SSL functions.
4238 *) Add copies of X509_STORE_CTX fields and callbacks to X509_STORE
4239 structure. These are inherited by X509_STORE_CTX when it is
4240 initialised. This allows various defaults to be set in the
4241 X509_STORE structure (such as flags for CRL checking and custom
4242 purpose or trust settings) for functions which only use X509_STORE_CTX
4243 internally such as S/MIME.
projects / openssl.git / blob