5 Changes between 1.0.0f and 1.0.0g [18 Jan 2012]
7 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
8 Thanks to Antonio Martin, Enterprise Secure Access Research and
9 Development, Cisco Systems, Inc. for discovering this bug and
10 preparing a fix. (CVE-2012-0050)
13 Changes between 1.0.0e and 1.0.0f [4 Jan 2012]
15 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
16 of the Vaudenay padding oracle attack on CBC mode encryption
17 which enables an efficient plaintext recovery attack against
18 the OpenSSL implementation of DTLS. Their attack exploits timing
19 differences arising during decryption processing. A research
20 paper describing this attack can be found at:
21 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
22 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
23 Security Group at Royal Holloway, University of London
24 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
25 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
26 for preparing the fix. (CVE-2011-4108)
27 [Robin Seggelmann, Michael Tuexen]
29 *) Clear bytes used for block padding of SSL 3.0 records.
31 [Adam Langley (Google)]
33 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
34 Kadianakis <desnacked@gmail.com> for discovering this issue and
35 Adam Langley for preparing the fix. (CVE-2011-4619)
36 [Adam Langley (Google)]
38 *) Check parameters are not NULL in GOST ENGINE. (CVE-2012-0027)
39 [Andrey Kulikov <amdeich@gmail.com>]
41 *) Prevent malformed RFC3779 data triggering an assertion failure.
42 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
43 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
44 [Rob Austein <sra@hactrn.net>]
46 *) Improved PRNG seeding for VOS.
47 [Paul Green <Paul.Green@stratus.com>]
49 *) Fix ssl_ciph.c set-up race.
50 [Adam Langley (Google)]
52 *) Fix spurious failures in ecdsatest.c.
53 [Emilia Käsper (Google)]
55 *) Fix the BIO_f_buffer() implementation (which was mixing different
56 interpretations of the '..._len' fields).
57 [Adam Langley (Google)]
59 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
60 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
61 threads won't reuse the same blinding coefficients.
63 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
64 lock to call BN_BLINDING_invert_ex, and avoids one use of
65 BN_BLINDING_update for each BN_BLINDING structure (previously,
66 the last update always remained unused).
67 [Emilia Käsper (Google)]
69 *) In ssl3_clear, preserve s3->init_extra along with s3->rbuf.
70 [Bob Buckholz (Google)]
72 Changes between 1.0.0d and 1.0.0e [6 Sep 2011]
74 *) Fix bug where CRLs with nextUpdate in the past are sometimes accepted
75 by initialising X509_STORE_CTX properly. (CVE-2011-3207)
76 [Kaspar Brand <ossl@velox.ch>]
78 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
79 for multi-threaded use of ECDH. (CVE-2011-3210)
80 [Adam Langley (Google)]
82 *) Fix x509_name_ex_d2i memory leak on bad inputs.
85 *) Remove hard coded ecdsaWithSHA1 signature tests in ssl code and check
86 signature public key algorithm by using OID xref utilities instead.
87 Before this you could only use some ECC ciphersuites with SHA1 only.
90 *) Add protection against ECDSA timing attacks as mentioned in the paper
91 by Billy Bob Brumley and Nicola Tuveri, see:
93 http://eprint.iacr.org/2011/232.pdf
95 [Billy Bob Brumley and Nicola Tuveri]
97 Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
99 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
100 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
102 *) Fix bug in string printing code: if *any* escaping is enabled we must
103 escape the escape character (backslash) or the resulting string is
107 Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
109 *) Disable code workaround for ancient and obsolete Netscape browsers
110 and servers: an attacker can use it in a ciphersuite downgrade attack.
111 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
114 *) Fixed J-PAKE implementation error, originally discovered by
115 Sebastien Martini, further info and confirmation from Stefan
116 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
119 Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
121 *) Fix extension code to avoid race conditions which can result in a buffer
122 overrun vulnerability: resumed sessions must not be modified as they can
123 be shared by multiple threads. CVE-2010-3864
126 *) Fix WIN32 build system to correctly link an ENGINE directory into
130 Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
132 *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
134 [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
136 Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
138 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
139 context. The operation can be customised via the ctrl mechanism in
140 case ENGINEs want to include additional functionality.
143 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
146 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
147 output hashes compatible with older versions of OpenSSL.
148 [Willy Weisz <weisz@vcpc.univie.ac.at>]
150 *) Fix compression algorithm handling: if resuming a session use the
151 compression algorithm of the resumed session instead of determining
152 it from client hello again. Don't allow server to change algorithm.
155 *) Add load_crls() function to apps tidying load_certs() too. Add option
156 to verify utility to allow additional CRLs to be included.
159 *) Update OCSP request code to permit adding custom headers to the request:
160 some responders need this.
163 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
165 [Julia Lawall <julia@diku.dk>]
167 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
168 needlessly dereferenced structures, used obsolete functions and
169 didn't handle all updated verify codes correctly.
172 *) Disable MD2 in the default configuration.
175 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
176 indicate the initial BIO being pushed or popped. This makes it possible
177 to determine whether the BIO is the one explicitly called or as a result
178 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
179 it handles reference counts correctly and doesn't zero out the I/O bio
180 when it is not being explicitly popped. WARNING: applications which
181 included workarounds for the old buggy behaviour will need to be modified
182 or they could free up already freed BIOs.
185 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
186 renaming to all platforms (within the 0.9.8 branch, this was
187 done conditionally on Netware platforms to avoid a name clash).
188 [Guenter <lists@gknw.net>]
190 *) Add ECDHE and PSK support to DTLS.
191 [Michael Tuexen <tuexen@fh-muenster.de>]
193 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
197 *) Add "missing" function EVP_MD_flags() (without this the only way to
198 retrieve a digest flags is by accessing the structure directly. Update
199 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
200 or cipher is registered as in the "from" argument. Print out all
201 registered digests in the dgst usage message instead of manually
202 attempting to work them out.
205 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
206 this allows the use of compression and extensions. Change default cipher
207 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
208 by default unless an application cipher string requests it.
211 *) Alter match criteria in PKCS12_parse(). It used to try to use local
212 key ids to find matching certificates and keys but some PKCS#12 files
213 don't follow the (somewhat unwritten) rules and this strategy fails.
214 Now just gather all certificates together and the first private key
215 then look for the first certificate that matches the key.
218 *) Support use of registered digest and cipher names for dgst and cipher
219 commands instead of having to add each one as a special case. So now
226 openssl dgst -sha256 foo
228 and this works for ENGINE based algorithms too.
232 *) Update Gost ENGINE to support parameter files.
233 [Victor B. Wagner <vitus@cryptocom.ru>]
235 *) Support GeneralizedTime in ca utility.
236 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
238 *) Enhance the hash format used for certificate directory links. The new
239 form uses the canonical encoding (meaning equivalent names will work
240 even if they aren't identical) and uses SHA1 instead of MD5. This form
241 is incompatible with the older format and as a result c_rehash should
242 be used to rebuild symbolic links.
245 *) Make PKCS#8 the default write format for private keys, replacing the
246 traditional format. This form is standardised, more secure and doesn't
247 include an implicit MD5 dependency.
250 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
251 committed to OpenSSL should pass this lot as a minimum.
254 *) Add session ticket override functionality for use by EAP-FAST.
255 [Jouni Malinen <j@w1.fi>]
257 *) Modify HMAC functions to return a value. Since these can be implemented
258 in an ENGINE errors can occur.
261 *) Type-checked OBJ_bsearch_ex.
264 *) Type-checked OBJ_bsearch. Also some constification necessitated
265 by type-checking. Still to come: TXT_DB, bsearch(?),
266 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
270 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
271 seconds to a tm structure directly, instead of going through OS
272 specific date routines. This avoids any issues with OS routines such
273 as the year 2038 bug. New *_adj() functions for ASN1 time structures
274 and X509_time_adj_ex() to cover the extended range. The existing
275 X509_time_adj() is still usable and will no longer have any date issues.
278 *) Delta CRL support. New use deltas option which will attempt to locate
279 and search any appropriate delta CRLs available.
281 This work was sponsored by Google.
284 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
285 code and add additional score elements. Validate alternate CRL paths
286 as part of the CRL checking and indicate a new error "CRL path validation
287 error" in this case. Applications wanting additional details can use
288 the verify callback and check the new "parent" field. If this is not
289 NULL CRL path validation is taking place. Existing applications wont
290 see this because it requires extended CRL support which is off by
293 This work was sponsored by Google.
296 *) Support for freshest CRL extension.
298 This work was sponsored by Google.
301 *) Initial indirect CRL support. Currently only supported in the CRLs
302 passed directly and not via lookup. Process certificate issuer
303 CRL entry extension and lookup CRL entries by bother issuer name
304 and serial number. Check and process CRL issuer entry in IDP extension.
306 This work was sponsored by Google.
309 *) Add support for distinct certificate and CRL paths. The CRL issuer
310 certificate is validated separately in this case. Only enabled if
311 an extended CRL support flag is set: this flag will enable additional
312 CRL functionality in future.
314 This work was sponsored by Google.
317 *) Add support for policy mappings extension.
319 This work was sponsored by Google.
322 *) Fixes to pathlength constraint, self issued certificate handling,
323 policy processing to align with RFC3280 and PKITS tests.
325 This work was sponsored by Google.
328 *) Support for name constraints certificate extension. DN, email, DNS
329 and URI types are currently supported.
331 This work was sponsored by Google.
334 *) To cater for systems that provide a pointer-based thread ID rather
335 than numeric, deprecate the current numeric thread ID mechanism and
336 replace it with a structure and associated callback type. This
337 mechanism allows a numeric "hash" to be extracted from a thread ID in
338 either case, and on platforms where pointers are larger than 'long',
339 mixing is done to help ensure the numeric 'hash' is usable even if it
340 can't be guaranteed unique. The default mechanism is to use "&errno"
341 as a pointer-based thread ID to distinguish between threads.
343 Applications that want to provide their own thread IDs should now use
344 CRYPTO_THREADID_set_callback() to register a callback that will call
345 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
347 Note that ERR_remove_state() is now deprecated, because it is tied
348 to the assumption that thread IDs are numeric. ERR_remove_state(0)
349 to free the current thread's error state should be replaced by
350 ERR_remove_thread_state(NULL).
352 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
353 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
354 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
355 application was previously providing a numeric thread callback that
356 was inappropriate for distinguishing threads, then uniqueness might
357 have been obtained with &errno that happened immediately in the
358 intermediate development versions of OpenSSL; this is no longer the
359 case, the numeric thread callback will now override the automatic use
361 [Geoff Thorpe, with help from Bodo Moeller]
363 *) Initial support for different CRL issuing certificates. This covers a
364 simple case where the self issued certificates in the chain exist and
365 the real CRL issuer is higher in the existing chain.
367 This work was sponsored by Google.
370 *) Removed effectively defunct crypto/store from the build.
373 *) Revamp of STACK to provide stronger type-checking. Still to come:
374 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
375 ASN1_STRING, CONF_VALUE.
378 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
379 RAM on SSL connections. This option can save about 34k per idle SSL.
382 *) Revamp of LHASH to provide stronger type-checking. Still to come:
383 STACK, TXT_DB, bsearch, qsort.
386 *) Initial support for Cryptographic Message Syntax (aka CMS) based
387 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
388 support for data, signedData, compressedData, digestedData and
389 encryptedData, envelopedData types included. Scripts to check against
390 RFC4134 examples draft and interop and consistency checks of many
391 content types and variants.
394 *) Add options to enc utility to support use of zlib compression BIO.
397 *) Extend mk1mf to support importing of options and assembly language
398 files from Configure script, currently only included in VC-WIN32.
399 The assembly language rules can now optionally generate the source
400 files from the associated perl scripts.
403 *) Implement remaining functionality needed to support GOST ciphersuites.
404 Interop testing has been performed using CryptoPro implementations.
405 [Victor B. Wagner <vitus@cryptocom.ru>]
407 *) s390x assembler pack.
410 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
414 *) Implement Opaque PRF Input TLS extension as specified in
415 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
416 official specification yet and no extension type assignment by
417 IANA exists, this extension (for now) will have to be explicitly
418 enabled when building OpenSSL by providing the extension number
419 to use. For example, specify an option
421 -DTLSEXT_TYPE_opaque_prf_input=0x9527
423 to the "config" or "Configure" script to enable the extension,
424 assuming extension number 0x9527 (which is a completely arbitrary
425 and unofficial assignment based on the MD5 hash of the Internet
426 Draft). Note that by doing so, you potentially lose
427 interoperability with other TLS implementations since these might
428 be using the same extension number for other purposes.
430 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
431 opaque PRF input value to use in the handshake. This will create
432 an interal copy of the length-'len' string at 'src', and will
433 return non-zero for success.
435 To get more control and flexibility, provide a callback function
438 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
439 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
443 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
446 Callback function 'cb' will be called in handshakes, and is
447 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
448 Argument 'arg' is for application purposes (the value as given to
449 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
450 be provided to the callback function). The callback function
451 has to return non-zero to report success: usually 1 to use opaque
452 PRF input just if possible, or 2 to enforce use of the opaque PRF
453 input. In the latter case, the library will abort the handshake
454 if opaque PRF input is not successfully negotiated.
456 Arguments 'peerinput' and 'len' given to the callback function
457 will always be NULL and 0 in the case of a client. A server will
458 see the client's opaque PRF input through these variables if
459 available (NULL and 0 otherwise). Note that if the server
460 provides an opaque PRF input, the length must be the same as the
461 length of the client's opaque PRF input.
463 Note that the callback function will only be called when creating
464 a new session (session resumption can resume whatever was
465 previously negotiated), and will not be called in SSL 2.0
466 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
467 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
468 for applications that need to enforce opaque PRF input.
472 *) Update ssl code to support digests other than SHA1+MD5 for handshake
475 [Victor B. Wagner <vitus@cryptocom.ru>]
477 *) Add RFC4507 support to OpenSSL. This includes the corrections in
478 RFC4507bis. The encrypted ticket format is an encrypted encoded
479 SSL_SESSION structure, that way new session features are automatically
482 If a client application caches session in an SSL_SESSION structure
483 support is transparent because tickets are now stored in the encoded
486 The SSL_CTX structure automatically generates keys for ticket
487 protection in servers so again support should be possible
488 with no application modification.
490 If a client or server wishes to disable RFC4507 support then the option
491 SSL_OP_NO_TICKET can be set.
493 Add a TLS extension debugging callback to allow the contents of any client
494 or server extensions to be examined.
496 This work was sponsored by Google.
499 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
500 OpenSSL should now compile cleanly on gcc 4.2
501 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
503 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
504 support including streaming MAC support: this is required for GOST
506 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
508 *) Add option -stream to use PKCS#7 streaming in smime utility. New
509 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
510 to output in BER and PEM format.
513 *) Experimental support for use of HMAC via EVP_PKEY interface. This
514 allows HMAC to be handled via the EVP_DigestSign*() interface. The
515 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
516 ENGINE support for HMAC keys which are unextractable. New -mac and
517 -macopt options to dgst utility.
520 *) New option -sigopt to dgst utility. Update dgst to use
521 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
522 alternative signing paramaters such as X9.31 or PSS in the dgst
526 *) Change ssl_cipher_apply_rule(), the internal function that does
527 the work each time a ciphersuite string requests enabling
528 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
529 removing ("!foo+bar") a class of ciphersuites: Now it maintains
530 the order of disabled ciphersuites such that those ciphersuites
531 that most recently went from enabled to disabled not only stay
532 in order with respect to each other, but also have higher priority
533 than other disabled ciphersuites the next time ciphersuites are
536 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
537 the same ciphersuites as with "HIGH" alone, but in a specific
538 order where the PSK ciphersuites come first (since they are the
539 most recently disabled ciphersuites when "HIGH" is parsed).
541 Also, change ssl_create_cipher_list() (using this new
542 funcionality) such that between otherwise identical
543 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
547 *) Change ssl_create_cipher_list() so that it automatically
548 arranges the ciphersuites in reasonable order before starting
549 to process the rule string. Thus, the definition for "DEFAULT"
550 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
551 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
552 This makes it much easier to arrive at a reasonable default order
553 in applications for which anonymous ciphers are OK (meaning
554 that you can't actually use DEFAULT).
555 [Bodo Moeller; suggested by Victor Duchovni]
557 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
558 processing) into multiple integers instead of setting
559 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
560 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
561 (These masks as well as the individual bit definitions are hidden
562 away into the non-exported interface ssl/ssl_locl.h, so this
563 change to the definition of the SSL_CIPHER structure shouldn't
564 affect applications.) This give us more bits for each of these
565 categories, so there is no longer a need to coagulate AES128 and
566 AES256 into a single algorithm bit, and to coagulate Camellia128
567 and Camellia256 into a single algorithm bit, which has led to all
570 Thus, among other things, the kludge introduced in 0.9.7m and
571 0.9.8e for masking out AES256 independently of AES128 or masking
572 out Camellia256 independently of AES256 is not needed here in 0.9.9.
574 With the change, we also introduce new ciphersuite aliases that
575 so far were missing: "AES128", "AES256", "CAMELLIA128", and
579 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
580 Use the leftmost N bytes of the signature input if the input is
581 larger than the prime q (with N being the size in bytes of q).
584 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
585 it yet and it is largely untested.
588 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
591 *) Initial incomplete changes to avoid need for function casts in OpenSSL
592 some compilers (gcc 4.2 and later) reject their use. Safestack is
593 reimplemented. Update ASN1 to avoid use of legacy functions.
596 *) Win32/64 targets are linked with Winsock2.
599 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
600 to external functions. This can be used to increase CRL handling
601 efficiency especially when CRLs are very large by (for example) storing
602 the CRL revoked certificates in a database.
605 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
606 new CRLs added to a directory can be used. New command line option
607 -verify_return_error to s_client and s_server. This causes real errors
608 to be returned by the verify callback instead of carrying on no matter
609 what. This reflects the way a "real world" verify callback would behave.
612 *) GOST engine, supporting several GOST algorithms and public key formats.
613 Kindly donated by Cryptocom.
616 *) Partial support for Issuing Distribution Point CRL extension. CRLs
617 partitioned by DP are handled but no indirect CRL or reason partitioning
618 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
619 selected via a scoring technique which handles IDP and AKID in CRLs.
622 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
623 will ultimately be used for all verify operations: this will remove the
624 X509_STORE dependency on certificate verification and allow alternative
625 lookup methods. X509_STORE based implementations of these two callbacks.
628 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
629 Modify get_crl() to find a valid (unexpired) CRL if possible.
632 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
633 this would be called X509_CRL_cmp() but that name is already used by
634 a function that just compares CRL issuer names. Cache several CRL
635 extensions in X509_CRL structure and cache CRLDP in X509.
638 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
639 this maps equivalent X509_NAME structures into a consistent structure.
640 Name comparison can then be performed rapidly using memcmp().
643 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
647 *) Allow digests to supply their own micalg string for S/MIME type using
648 the ctrl EVP_MD_CTRL_MICALG.
651 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
652 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
653 ctrl. It can then customise the structure before and/or after signing
657 *) New function OBJ_add_sigid() to allow application defined signature OIDs
658 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
659 to free up any added signature OIDs.
662 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
663 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
664 digest and cipher tables. New options added to openssl utility:
665 list-message-digest-algorithms and list-cipher-algorithms.
668 *) Change the array representation of binary polynomials: the list
669 of degrees of non-zero coefficients is now terminated with -1.
670 Previously it was terminated with 0, which was also part of the
671 value; thus, the array representation was not applicable to
672 polynomials where t^0 has coefficient zero. This change makes
673 the array representation useful in a more general context.
676 *) Various modifications and fixes to SSL/TLS cipher string
677 handling. For ECC, the code now distinguishes between fixed ECDH
678 with RSA certificates on the one hand and with ECDSA certificates
679 on the other hand, since these are separate ciphersuites. The
680 unused code for Fortezza ciphersuites has been removed.
682 For consistency with EDH, ephemeral ECDH is now called "EECDH"
683 (not "ECDHE"). For consistency with the code for DH
684 certificates, use of ECDH certificates is now considered ECDH
685 authentication, not RSA or ECDSA authentication (the latter is
686 merely the CA's signing algorithm and not actively used in the
689 The temporary ciphersuite alias "ECCdraft" is no longer
690 available, and ECC ciphersuites are no longer excluded from "ALL"
691 and "DEFAULT". The following aliases now exist for RFC 4492
692 ciphersuites, most of these by analogy with the DH case:
694 kECDHr - ECDH cert, signed with RSA
695 kECDHe - ECDH cert, signed with ECDSA
696 kECDH - ECDH cert (signed with either RSA or ECDSA)
697 kEECDH - ephemeral ECDH
698 ECDH - ECDH cert or ephemeral ECDH
704 AECDH - anonymous ECDH
705 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
709 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
710 Use correct micalg parameters depending on digest(s) in signed message.
713 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
714 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
717 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
718 an engine to register a method. Add ENGINE lookups for methods and
719 functional reference processing.
722 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
723 EVP_{Sign,Verify}* which allow an application to customise the signature
727 *) New -resign option to smime utility. This adds one or more signers
728 to an existing PKCS#7 signedData structure. Also -md option to use an
729 alternative message digest algorithm for signing.
732 *) Tidy up PKCS#7 routines and add new functions to make it easier to
733 create PKCS7 structures containing multiple signers. Update smime
734 application to support multiple signers.
737 *) New -macalg option to pkcs12 utility to allow setting of an alternative
741 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
742 Reorganize PBE internals to lookup from a static table using NIDs,
743 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
744 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
745 PRF which will be automatically used with PBES2.
748 *) Replace the algorithm specific calls to generate keys in "req" with the
752 *) Update PKCS#7 enveloped data routines to use new API. This is now
753 supported by any public key method supporting the encrypt operation. A
754 ctrl is added to allow the public key algorithm to examine or modify
755 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
759 *) Add a ctrl to asn1 method to allow a public key algorithm to express
760 a default digest type to use. In most cases this will be SHA1 but some
761 algorithms (such as GOST) need to specify an alternative digest. The
762 return value indicates how strong the prefernce is 1 means optional and
763 2 is mandatory (that is it is the only supported type). Modify
764 ASN1_item_sign() to accept a NULL digest argument to indicate it should
765 use the default md. Update openssl utilities to use the default digest
766 type for signing if it is not explicitly indicated.
769 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
770 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
771 signing method from the key type. This effectively removes the link
772 between digests and public key types.
775 *) Add an OID cross reference table and utility functions. Its purpose is to
776 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
777 rsaEncryption. This will allow some of the algorithm specific hackery
778 needed to use the correct OID to be removed.
781 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
782 structures for PKCS7_sign(). They are now set up by the relevant public
786 *) Add provisional EC pkey method with support for ECDSA and ECDH.
789 *) Add support for key derivation (agreement) in the API, DH method and
793 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
794 public and private key formats. As a side effect these add additional
795 command line functionality not previously available: DSA signatures can be
796 generated and verified using pkeyutl and DH key support and generation in
801 [Oliver Tappe <zooey@hirschkaefer.de>]
803 *) New make target "install_html_docs" installs HTML renditions of the
805 [Oliver Tappe <zooey@hirschkaefer.de>]
807 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
808 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
809 support key and parameter generation and add initial key generation
810 functionality for RSA.
813 *) Add functions for main EVP_PKEY_method operations. The undocumented
814 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
815 EVP_PKEY_{encrypt,decrypt}_old.
818 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
819 key API, doesn't do much yet.
822 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
823 public key algorithms. New option to openssl utility:
824 "list-public-key-algorithms" to print out info.
827 *) Implement the Supported Elliptic Curves Extension for
828 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
831 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
832 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
835 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
836 utilities such as rsa, dsa, dsaparam etc except they process any key
840 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
841 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
842 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
846 *) Initial support for pluggable public key ASN1.
847 De-spaghettify the public key ASN1 handling. Move public and private
848 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
849 algorithm specific handling to a single module within the relevant
850 algorithm directory. Add functions to allow (near) opaque processing
851 of public and private key structures.
854 *) Implement the Supported Point Formats Extension for
855 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
858 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
859 for the psk identity [hint] and the psk callback functions to the
860 SSL_SESSION, SSL and SSL_CTX structure.
863 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
867 SSL_CTX_use_psk_identity_hint
868 SSL_get_psk_identity_hint
870 SSL_use_psk_identity_hint
872 [Mika Kousa and Pasi Eronen of Nokia Corporation]
874 *) Add RFC 3161 compliant time stamp request creation, response generation
875 and response verification functionality.
876 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
878 *) Add initial support for TLS extensions, specifically for the server_name
879 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
880 have new members for a host name. The SSL data structure has an
881 additional member SSL_CTX *initial_ctx so that new sessions can be
882 stored in that context to allow for session resumption, even after the
883 SSL has been switched to a new SSL_CTX in reaction to a client's
884 server_name extension.
886 New functions (subject to change):
889 SSL_get_servername_type()
892 New CTRL codes and macros (subject to change):
894 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
895 - SSL_CTX_set_tlsext_servername_callback()
896 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
897 - SSL_CTX_set_tlsext_servername_arg()
898 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
900 openssl s_client has a new '-servername ...' option.
902 openssl s_server has new options '-servername_host ...', '-cert2 ...',
903 '-key2 ...', '-servername_fatal' (subject to change). This allows
904 testing the HostName extension for a specific single host name ('-cert'
905 and '-key' remain fallbacks for handshakes without HostName
906 negotiation). If the unrecogninzed_name alert has to be sent, this by
907 default is a warning; it becomes fatal with the '-servername_fatal'
910 [Peter Sylvester, Remy Allais, Christophe Renou]
912 *) Whirlpool hash implementation is added.
915 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
916 bn(64,32). Because of instruction set limitations it doesn't have
917 any negative impact on performance. This was done mostly in order
918 to make it possible to share assembler modules, such as bn_mul_mont
919 implementations, between 32- and 64-bit builds without hassle.
922 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
923 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
927 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
928 dedicated Montgomery multiplication procedure, is introduced.
929 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
930 "64-bit" performance on certain 32-bit targets.
933 *) New option SSL_OP_NO_COMP to disable use of compression selectively
934 in SSL structures. New SSL ctrl to set maximum send fragment size.
935 Save memory by seeting the I/O buffer sizes dynamically instead of
936 using the maximum available value.
939 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
940 in addition to the text details.
943 *) Very, very preliminary EXPERIMENTAL support for printing of general
944 ASN1 structures. This currently produces rather ugly output and doesn't
945 handle several customised structures at all.
948 *) Integrated support for PVK file format and some related formats such
949 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
950 these in the 'rsa' and 'dsa' utilities.
953 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
956 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
957 place for the (very old) "NETSCAPE" format certificates which are now
958 handled using new ASN1 code equivalents.
961 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
962 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
963 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
966 *) Modify CRL distribution points extension code to print out previously
967 unsupported fields. Enhance extension setting code to allow setting of
971 *) Add print and set support for Issuing Distribution Point CRL extension.
974 *) Change 'Configure' script to enable Camellia by default.
977 Changes between 0.9.8s and 0.9.8t [18 Jan 2012]
979 *) Fix for DTLS DoS issue introduced by fix for CVE-2011-4109.
980 Thanks to Antonio Martin, Enterprise Secure Access Research and
981 Development, Cisco Systems, Inc. for discovering this bug and
982 preparing a fix. (CVE-2012-0050)
985 Changes between 0.9.8r and 0.9.8s [4 Jan 2012]
987 *) Nadhem Alfardan and Kenny Paterson have discovered an extension
988 of the Vaudenay padding oracle attack on CBC mode encryption
989 which enables an efficient plaintext recovery attack against
990 the OpenSSL implementation of DTLS. Their attack exploits timing
991 differences arising during decryption processing. A research
992 paper describing this attack can be found at:
993 http://www.isg.rhul.ac.uk/~kp/dtls.pdf
994 Thanks go to Nadhem Alfardan and Kenny Paterson of the Information
995 Security Group at Royal Holloway, University of London
996 (www.isg.rhul.ac.uk) for discovering this flaw and to Robin Seggelmann
997 <seggelmann@fh-muenster.de> and Michael Tuexen <tuexen@fh-muenster.de>
998 for preparing the fix. (CVE-2011-4108)
999 [Robin Seggelmann, Michael Tuexen]
1001 *) Stop policy check failure freeing same buffer twice. (CVE-2011-4109)
1002 [Ben Laurie, Kasper <ekasper@google.com>]
1004 *) Clear bytes used for block padding of SSL 3.0 records.
1006 [Adam Langley (Google)]
1008 *) Only allow one SGC handshake restart for SSL/TLS. Thanks to George
1009 Kadianakis <desnacked@gmail.com> for discovering this issue and
1010 Adam Langley for preparing the fix. (CVE-2011-4619)
1011 [Adam Langley (Google)]
1013 *) Prevent malformed RFC3779 data triggering an assertion failure.
1014 Thanks to Andrew Chi, BBN Technologies, for discovering the flaw
1015 and Rob Austein <sra@hactrn.net> for fixing it. (CVE-2011-4577)
1016 [Rob Austein <sra@hactrn.net>]
1018 *) Fix ssl_ciph.c set-up race.
1019 [Adam Langley (Google)]
1021 *) Fix spurious failures in ecdsatest.c.
1022 [Emilia Käsper (Google)]
1024 *) Fix the BIO_f_buffer() implementation (which was mixing different
1025 interpretations of the '..._len' fields).
1026 [Adam Langley (Google)]
1028 *) Fix handling of BN_BLINDING: now BN_BLINDING_invert_ex (rather than
1029 BN_BLINDING_invert_ex) calls BN_BLINDING_update, ensuring that concurrent
1030 threads won't reuse the same blinding coefficients.
1032 This also avoids the need to obtain the CRYPTO_LOCK_RSA_BLINDING
1033 lock to call BN_BLINDING_invert_ex, and avoids one use of
1034 BN_BLINDING_update for each BN_BLINDING structure (previously,
1035 the last update always remained unused).
1036 [Emilia Käsper (Google)]
1038 *) Fix SSL memory handling for (EC)DH ciphersuites, in particular
1039 for multi-threaded use of ECDH.
1040 [Adam Langley (Google)]
1042 *) Fix x509_name_ex_d2i memory leak on bad inputs.
1045 *) Add protection against ECDSA timing attacks as mentioned in the paper
1046 by Billy Bob Brumley and Nicola Tuveri, see:
1048 http://eprint.iacr.org/2011/232.pdf
1050 [Billy Bob Brumley and Nicola Tuveri]
1052 Changes between 0.9.8q and 0.9.8r [8 Feb 2011]
1054 *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
1055 [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
1057 *) Fix bug in string printing code: if *any* escaping is enabled we must
1058 escape the escape character (backslash) or the resulting string is
1062 Changes between 0.9.8p and 0.9.8q [2 Dec 2010]
1064 *) Disable code workaround for ancient and obsolete Netscape browsers
1065 and servers: an attacker can use it in a ciphersuite downgrade attack.
1066 Thanks to Martin Rex for discovering this bug. CVE-2010-4180
1069 *) Fixed J-PAKE implementation error, originally discovered by
1070 Sebastien Martini, further info and confirmation from Stefan
1071 Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
1074 Changes between 0.9.8o and 0.9.8p [16 Nov 2010]
1076 *) Fix extension code to avoid race conditions which can result in a buffer
1077 overrun vulnerability: resumed sessions must not be modified as they can
1078 be shared by multiple threads. CVE-2010-3864
1081 *) Fix for double free bug in ssl/s3_clnt.c CVE-2010-2939
1084 *) Don't reencode certificate when calculating signature: cache and use
1085 the original encoding instead. This makes signature verification of
1086 some broken encodings work correctly.
1089 *) ec2_GF2m_simple_mul bugfix: compute correct result if the output EC_POINT
1090 is also one of the inputs.
1091 [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
1093 *) Don't repeatedly append PBE algorithms to table if they already exist.
1094 Sort table on each new add. This effectively makes the table read only
1095 after all algorithms are added and subsequent calls to PKCS12_pbe_add
1099 Changes between 0.9.8n and 0.9.8o [01 Jun 2010]
1101 [NB: OpenSSL 0.9.8o and later 0.9.8 patch levels were released after
1104 *) Correct a typo in the CMS ASN1 module which can result in invalid memory
1105 access or freeing data twice (CVE-2010-0742)
1106 [Steve Henson, Ronald Moesbergen <intercommit@gmail.com>]
1108 *) Add SHA2 algorithms to SSL_library_init(). SHA2 is becoming far more
1109 common in certificates and some applications which only call
1110 SSL_library_init and not OpenSSL_add_all_algorithms() will fail.
1114 Reduce copying into .apps and .test in makevms.com
1115 Don't try to use blank CA certificate in CA.com
1116 Allow use of C files from original directories in maketests.com
1117 [Steven M. Schweda" <sms@antinode.info>]
1119 Changes between 0.9.8m and 0.9.8n [24 Mar 2010]
1121 *) When rejecting SSL/TLS records due to an incorrect version number, never
1122 update s->server with a new major version number. As of
1123 - OpenSSL 0.9.8m if 'short' is a 16-bit type,
1124 - OpenSSL 0.9.8f if 'short' is longer than 16 bits,
1125 the previous behavior could result in a read attempt at NULL when
1126 receiving specific incorrect SSL/TLS records once record payload
1127 protection is active. (CVE-2010-0740)
1128 [Bodo Moeller, Adam Langley <agl@chromium.org>]
1130 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
1131 could be crashed if the relevant tables were not present (e.g. chrooted).
1132 [Tomas Hoger <thoger@redhat.com>]
1134 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
1136 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
1137 [Martin Olsson, Neel Mehta]
1139 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
1140 accommodate for stack sorting, always a write lock!).
1143 *) On some versions of WIN32 Heap32Next is very slow. This can cause
1144 excessive delays in the RAND_poll(): over a minute. As a workaround
1145 include a time check in the inner Heap32Next loop too.
1148 *) The code that handled flushing of data in SSL/TLS originally used the
1149 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
1150 the problem outlined in PR#1949. The fix suggested there however can
1151 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
1152 of Apache). So instead simplify the code to flush unconditionally.
1153 This should be fine since flushing with no data to flush is a no op.
1156 *) Handle TLS versions 2.0 and later properly and correctly use the
1157 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
1158 off ancient servers have a habit of sticking around for a while...
1161 *) Modify compression code so it frees up structures without using the
1162 ex_data callbacks. This works around a problem where some applications
1163 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
1164 restarting) then use compression (e.g. SSL with compression) later.
1165 This results in significant per-connection memory leaks and
1166 has caused some security issues including CVE-2008-1678 and
1170 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
1171 change when encrypting or decrypting.
1174 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
1175 connect and renegotiate with servers which do not support RI.
1176 Until RI is more widely deployed this option is enabled by default.
1179 *) Add "missing" ssl ctrls to clear options and mode.
1182 *) If client attempts to renegotiate and doesn't support RI respond with
1183 a no_renegotiation alert as required by RFC5746. Some renegotiating
1184 TLS clients will continue a connection gracefully when they receive
1185 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1186 waiting for a server hello which it will never receive. Now we treat a
1187 received no_renegotiation alert as a fatal error. This is because
1188 applications requesting a renegotiation might well expect it to succeed
1189 and would have no code in place to handle the server denying it so the
1190 only safe thing to do is to terminate the connection.
1193 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1194 peer supports secure renegotiation and 0 otherwise. Print out peer
1195 renegotiation support in s_client/s_server.
1198 *) Replace the highly broken and deprecated SPKAC certification method with
1199 the updated NID creation version. This should correctly handle UTF8.
1202 *) Implement RFC5746. Re-enable renegotiation but require the extension
1203 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1204 turns out to be a bad idea. It has been replaced by
1205 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1206 SSL_CTX_set_options(). This is really not recommended unless you
1207 know what you are doing.
1208 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1210 *) Fixes to stateless session resumption handling. Use initial_ctx when
1211 issuing and attempting to decrypt tickets in case it has changed during
1212 servername handling. Use a non-zero length session ID when attempting
1213 stateless session resumption: this makes it possible to determine if
1214 a resumption has occurred immediately after receiving server hello
1215 (several places in OpenSSL subtly assume this) instead of later in
1219 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1220 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1221 fixes for a few places where the return code is not checked
1223 [Julia Lawall <julia@diku.dk>]
1225 *) Add --strict-warnings option to Configure script to include devteam
1226 warnings in other configurations.
1229 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1230 makes it possible to install openssl libraries in locations which
1231 have names other than "lib", for example "/usr/lib64" which some
1233 [Steve Henson, based on patch from Jeremy Utley]
1235 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1236 X690 8.9.12 and can produce some misleading textual output of OIDs.
1237 [Steve Henson, reported by Dan Kaminsky]
1239 *) Delete MD2 from algorithm tables. This follows the recommendation in
1240 several standards that it is not used in new applications due to
1241 several cryptographic weaknesses. For binary compatibility reasons
1242 the MD2 API is still compiled in by default.
1245 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1249 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1250 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1252 [Guenter <lists@gknw.net>]
1254 *) Fix the server certificate chain building code to use X509_verify_cert(),
1255 it used to have an ad-hoc builder which was unable to cope with anything
1256 other than a simple chain.
1257 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1259 *) Don't check self signed certificate signatures in X509_verify_cert()
1260 by default (a flag can override this): it just wastes time without
1261 adding any security. As a useful side effect self signed root CAs
1262 with non-FIPS digests are now usable in FIPS mode.
1265 *) In dtls1_process_out_of_seq_message() the check if the current message
1266 is already buffered was missing. For every new message was memory
1267 allocated, allowing an attacker to perform an denial of service attack
1268 with sending out of seq handshake messages until there is no memory
1269 left. Additionally every future messege was buffered, even if the
1270 sequence number made no sense and would be part of another handshake.
1271 So only messages with sequence numbers less than 10 in advance will be
1272 buffered. (CVE-2009-1378)
1273 [Robin Seggelmann, discovered by Daniel Mentz]
1275 *) Records are buffered if they arrive with a future epoch to be
1276 processed after finishing the corresponding handshake. There is
1277 currently no limitation to this buffer allowing an attacker to perform
1278 a DOS attack with sending records with future epochs until there is no
1279 memory left. This patch adds the pqueue_size() function to detemine
1280 the size of a buffer and limits the record buffer to 100 entries.
1282 [Robin Seggelmann, discovered by Daniel Mentz]
1284 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
1285 parent structure is freed. (CVE-2009-1379)
1288 *) Handle non-blocking I/O properly in SSL_shutdown() call.
1289 [Darryl Miles <darryl-mailinglists@netbauds.net>]
1292 [Ilya O. <vrghost@gmail.com>]
1294 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
1296 *) Disable renegotiation completely - this fixes a severe security
1297 problem (CVE-2009-3555) at the cost of breaking all
1298 renegotiation. Renegotiation can be re-enabled by setting
1299 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
1300 run-time. This is really not recommended unless you know what
1304 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
1306 *) Don't set val to NULL when freeing up structures, it is freed up by
1307 underlying code. If sizeof(void *) > sizeof(long) this can result in
1308 zeroing past the valid field. (CVE-2009-0789)
1309 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
1311 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
1312 checked correctly. This would allow some invalid signed attributes to
1313 appear to verify correctly. (CVE-2009-0591)
1314 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1316 *) Reject UniversalString and BMPString types with invalid lengths. This
1317 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
1318 a legal length. (CVE-2009-0590)
1321 *) Set S/MIME signing as the default purpose rather than setting it
1322 unconditionally. This allows applications to override it at the store
1326 *) Permit restricted recursion of ASN1 strings. This is needed in practice
1327 to handle some structures.
1330 *) Improve efficiency of mem_gets: don't search whole buffer each time
1332 [Jeremy Shapiro <jnshapir@us.ibm.com>]
1334 *) New -hex option for openssl rand.
1337 *) Print out UTF8String and NumericString when parsing ASN1.
1340 *) Support NumericString type for name components.
1343 *) Allow CC in the environment to override the automatically chosen
1344 compiler. Note that nothing is done to ensure flags work with the
1348 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
1350 *) Properly check EVP_VerifyFinal() and similar return values
1352 [Ben Laurie, Bodo Moeller, Google Security Team]
1354 *) Enable TLS extensions by default.
1357 *) Allow the CHIL engine to be loaded, whether the application is
1358 multithreaded or not. (This does not release the developer from the
1359 obligation to set up the dynamic locking callbacks.)
1360 [Sander Temme <sander@temme.net>]
1362 *) Use correct exit code if there is an error in dgst command.
1363 [Steve Henson; problem pointed out by Roland Dirlewanger]
1365 *) Tweak Configure so that you need to say "experimental-jpake" to enable
1366 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
1369 *) Add experimental JPAKE support, including demo authentication in
1370 s_client and s_server.
1373 *) Set the comparison function in v3_addr_canonize().
1374 [Rob Austein <sra@hactrn.net>]
1376 *) Add support for XMPP STARTTLS in s_client.
1377 [Philip Paeps <philip@freebsd.org>]
1379 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
1380 to ensure that even with this option, only ciphersuites in the
1381 server's preference list will be accepted. (Note that the option
1382 applies only when resuming a session, so the earlier behavior was
1383 just about the algorithm choice for symmetric cryptography.)
1386 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
1388 *) Fix NULL pointer dereference if a DTLS server received
1389 ChangeCipherSpec as first record (CVE-2009-1386).
1392 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
1393 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
1396 *) The fix in 0.9.8c that supposedly got rid of unsafe
1397 double-checked locking was incomplete for RSA blinding,
1398 addressing just one layer of what turns out to have been
1399 doubly unsafe triple-checked locking.
1401 So now fix this for real by retiring the MONT_HELPER macro
1402 in crypto/rsa/rsa_eay.c.
1404 [Bodo Moeller; problem pointed out by Marius Schilder]
1406 *) Various precautionary measures:
1408 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
1410 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
1411 (NB: This would require knowledge of the secret session ticket key
1412 to exploit, in which case you'd be SOL either way.)
1414 - Change bn_nist.c so that it will properly handle input BIGNUMs
1415 outside the expected range.
1417 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
1420 [Neel Mehta, Bodo Moeller]
1422 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
1423 the load fails. Useful for distros.
1424 [Ben Laurie and the FreeBSD team]
1426 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
1429 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
1432 *) Expand ENGINE to support engine supplied SSL client certificate functions.
1434 This work was sponsored by Logica.
1437 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
1438 keystores. Support for SSL/TLS client authentication too.
1439 Not compiled unless enable-capieng specified to Configure.
1441 This work was sponsored by Logica.
1444 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
1445 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
1446 attribute creation routines such as certifcate requests and PKCS#12
1450 Changes between 0.9.8g and 0.9.8h [28 May 2008]
1452 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
1453 handshake which could lead to a cilent crash as found using the
1454 Codenomicon TLS test suite (CVE-2008-1672)
1455 [Steve Henson, Mark Cox]
1457 *) Fix double free in TLS server name extensions which could lead to
1458 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
1461 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
1463 Clear the error queue to ensure that error entries left from
1464 older function calls do not interfere with the correct operation.
1465 [Lutz Jaenicke, Erik de Castro Lopo]
1467 *) Remove root CA certificates of commercial CAs:
1469 The OpenSSL project does not recommend any specific CA and does not
1470 have any policy with respect to including or excluding any CA.
1471 Therefore it does not make any sense to ship an arbitrary selection
1472 of root CA certificates with the OpenSSL software.
1475 *) RSA OAEP patches to fix two separate invalid memory reads.
1476 The first one involves inputs when 'lzero' is greater than
1477 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
1478 before the beginning of from). The second one involves inputs where
1479 the 'db' section contains nothing but zeroes (there is a one-byte
1480 invalid read after the end of 'db').
1481 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1483 *) Partial backport from 0.9.9-dev:
1485 Introduce bn_mul_mont (dedicated Montgomery multiplication
1486 procedure) as a candidate for BIGNUM assembler implementation.
1487 While 0.9.9-dev uses assembler for various architectures, only
1488 x86_64 is available by default here in the 0.9.8 branch, and
1489 32-bit x86 is available through a compile-time setting.
1491 To try the 32-bit x86 assembler implementation, use Configure
1492 option "enable-montasm" (which exists only for this backport).
1494 As "enable-montasm" for 32-bit x86 disclaims code stability
1495 anyway, in this constellation we activate additional code
1496 backported from 0.9.9-dev for further performance improvements,
1497 namely BN_from_montgomery_word. (To enable this otherwise,
1498 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
1500 [Andy Polyakov (backport partially by Bodo Moeller)]
1502 *) Add TLS session ticket callback. This allows an application to set
1503 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
1504 values. This is useful for key rollover for example where several key
1505 sets may exist with different names.
1508 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
1509 This was broken until now in 0.9.8 releases, such that the only way
1510 a registered ENGINE could be used (assuming it initialises
1511 successfully on the host) was to explicitly set it as the default
1512 for the relevant algorithms. This is in contradiction with 0.9.7
1513 behaviour and the documentation. With this fix, when an ENGINE is
1514 registered into a given algorithm's table of implementations, the
1515 'uptodate' flag is reset so that auto-discovery will be used next
1516 time a new context for that algorithm attempts to select an
1518 [Ian Lister (tweaked by Geoff Thorpe)]
1520 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
1521 implemention in the following ways:
1523 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
1526 Lack of BER streaming support means one pass streaming processing is
1527 only supported if data is detached: setting the streaming flag is
1528 ignored for embedded content.
1530 CMS support is disabled by default and must be explicitly enabled
1531 with the enable-cms configuration option.
1534 *) Update the GMP engine glue to do direct copies between BIGNUM and
1535 mpz_t when openssl and GMP use the same limb size. Otherwise the
1536 existing "conversion via a text string export" trick is still used.
1537 [Paul Sheer <paulsheer@gmail.com>]
1539 *) Zlib compression BIO. This is a filter BIO which compressed and
1540 uncompresses any data passed through it.
1543 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
1544 RFC3394 compatible AES key wrapping.
1547 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
1548 sets string data without copying. X509_ALGOR_set0() and
1549 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
1550 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
1551 from an X509_ATTRIBUTE structure optionally checking it occurs only
1552 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
1556 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
1557 to get the expected BN_FLG_CONSTTIME behavior.
1558 [Bodo Moeller (Google)]
1562 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
1563 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
1564 - added some more tests to do_tests.pl
1565 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
1566 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
1567 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
1568 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
1569 - various changes to netware.pl to enable gcc-cross builds on Win32
1571 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
1572 - various changes to fix missing prototype warnings
1573 - fixed x86nasm.pl to create correct asm files for NASM COFF output
1574 - added AES, WHIRLPOOL and CPUID assembler code to build files
1575 - added missing AES assembler make rules to mk1mf.pl
1576 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
1577 [Guenter Knauf <eflash@gmx.net>]
1579 *) Implement certificate status request TLS extension defined in RFC3546.
1580 A client can set the appropriate parameters and receive the encoded
1581 OCSP response via a callback. A server can query the supplied parameters
1582 and set the encoded OCSP response in the callback. Add simplified examples
1583 to s_client and s_server.
1586 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
1588 *) Fix various bugs:
1589 + Binary incompatibility of ssl_ctx_st structure
1590 + DTLS interoperation with non-compliant servers
1591 + Don't call get_session_cb() without proposed session
1592 + Fix ia64 assembler code
1593 [Andy Polyakov, Steve Henson]
1595 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
1597 *) DTLS Handshake overhaul. There were longstanding issues with
1598 OpenSSL DTLS implementation, which were making it impossible for
1599 RFC 4347 compliant client to communicate with OpenSSL server.
1600 Unfortunately just fixing these incompatibilities would "cut off"
1601 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
1602 server keeps tolerating non RFC compliant syntax. The opposite is
1603 not true, 0.9.8f client can not communicate with earlier server.
1604 This update even addresses CVE-2007-4995.
1607 *) Changes to avoid need for function casts in OpenSSL: some compilers
1608 (gcc 4.2 and later) reject their use.
1609 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
1612 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1613 RFC4507bis. The encrypted ticket format is an encrypted encoded
1614 SSL_SESSION structure, that way new session features are automatically
1617 If a client application caches session in an SSL_SESSION structure
1618 support is transparent because tickets are now stored in the encoded
1621 The SSL_CTX structure automatically generates keys for ticket
1622 protection in servers so again support should be possible
1623 with no application modification.
1625 If a client or server wishes to disable RFC4507 support then the option
1626 SSL_OP_NO_TICKET can be set.
1628 Add a TLS extension debugging callback to allow the contents of any client
1629 or server extensions to be examined.
1631 This work was sponsored by Google.
1634 *) Add initial support for TLS extensions, specifically for the server_name
1635 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1636 have new members for a host name. The SSL data structure has an
1637 additional member SSL_CTX *initial_ctx so that new sessions can be
1638 stored in that context to allow for session resumption, even after the
1639 SSL has been switched to a new SSL_CTX in reaction to a client's
1640 server_name extension.
1642 New functions (subject to change):
1644 SSL_get_servername()
1645 SSL_get_servername_type()
1648 New CTRL codes and macros (subject to change):
1650 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1651 - SSL_CTX_set_tlsext_servername_callback()
1652 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1653 - SSL_CTX_set_tlsext_servername_arg()
1654 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1656 openssl s_client has a new '-servername ...' option.
1658 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1659 '-key2 ...', '-servername_fatal' (subject to change). This allows
1660 testing the HostName extension for a specific single host name ('-cert'
1661 and '-key' remain fallbacks for handshakes without HostName
1662 negotiation). If the unrecogninzed_name alert has to be sent, this by
1663 default is a warning; it becomes fatal with the '-servername_fatal'
1666 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
1668 *) Add AES and SSE2 assembly language support to VC++ build.
1671 *) Mitigate attack on final subtraction in Montgomery reduction.
1674 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
1675 (which previously caused an internal error).
1678 *) Squeeze another 10% out of IGE mode when in != out.
1681 *) AES IGE mode speedup.
1682 [Dean Gaudet (Google)]
1684 *) Add the Korean symmetric 128-bit cipher SEED (see
1685 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
1686 add SEED ciphersuites from RFC 4162:
1688 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
1689 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
1690 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
1691 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
1693 To minimize changes between patchlevels in the OpenSSL 0.9.8
1694 series, SEED remains excluded from compilation unless OpenSSL
1695 is configured with 'enable-seed'.
1696 [KISA, Bodo Moeller]
1698 *) Mitigate branch prediction attacks, which can be practical if a
1699 single processor is shared, allowing a spy process to extract
1700 information. For detailed background information, see
1701 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
1702 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
1703 and Necessary Software Countermeasures"). The core of the change
1704 are new versions BN_div_no_branch() and
1705 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
1706 respectively, which are slower, but avoid the security-relevant
1707 conditional branches. These are automatically called by BN_div()
1708 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
1709 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
1710 remove a conditional branch.
1712 BN_FLG_CONSTTIME is the new name for the previous
1713 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
1714 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
1715 in the exponent causes BN_mod_exp_mont() to use the alternative
1716 implementation in BN_mod_exp_mont_consttime().) The old name
1717 remains as a deprecated alias.
1719 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
1720 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
1721 constant-time implementations for more than just exponentiation.
1722 Here too the old name is kept as a deprecated alias.
1724 BN_BLINDING_new() will now use BN_dup() for the modulus so that
1725 the BN_BLINDING structure gets an independent copy of the
1726 modulus. This means that the previous "BIGNUM *m" argument to
1727 BN_BLINDING_new() and to BN_BLINDING_create_param() now
1728 essentially becomes "const BIGNUM *m", although we can't actually
1729 change this in the header file before 0.9.9. It allows
1730 RSA_setup_blinding() to use BN_with_flags() on the modulus to
1731 enable BN_FLG_CONSTTIME.
1733 [Matthew D Wood (Intel Corp)]
1735 *) In the SSL/TLS server implementation, be strict about session ID
1736 context matching (which matters if an application uses a single
1737 external cache for different purposes). Previously,
1738 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
1739 set. This did ensure strict client verification, but meant that,
1740 with applications using a single external cache for quite
1741 different requirements, clients could circumvent ciphersuite
1742 restrictions for a given session ID context by starting a session
1743 in a different context.
1746 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
1747 a ciphersuite string such as "DEFAULT:RSA" cannot enable
1748 authentication-only ciphersuites.
1751 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
1752 not complete and could lead to a possible single byte overflow
1753 (CVE-2007-5135) [Ben Laurie]
1755 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
1757 *) Since AES128 and AES256 (and similarly Camellia128 and
1758 Camellia256) share a single mask bit in the logic of
1759 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
1760 kludge to work properly if AES128 is available and AES256 isn't
1761 (or if Camellia128 is available and Camellia256 isn't).
1764 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
1765 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
1766 When a point or a seed is encoded in a BIT STRING, we need to
1767 prevent the removal of trailing zero bits to get the proper DER
1768 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
1769 of a NamedBitList, for which trailing 0 bits need to be removed.)
1772 *) Have SSL/TLS server implementation tolerate "mismatched" record
1773 protocol version while receiving ClientHello even if the
1774 ClientHello is fragmented. (The server can't insist on the
1775 particular protocol version it has chosen before the ServerHello
1776 message has informed the client about his choice.)
1779 *) Add RFC 3779 support.
1780 [Rob Austein for ARIN, Ben Laurie]
1782 *) Load error codes if they are not already present instead of using a
1783 static variable. This allows them to be cleanly unloaded and reloaded.
1784 Improve header file function name parsing.
1787 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
1788 or CAPABILITY handshake as required by RFCs.
1791 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
1793 *) Introduce limits to prevent malicious keys being able to
1794 cause a denial of service. (CVE-2006-2940)
1795 [Steve Henson, Bodo Moeller]
1797 *) Fix ASN.1 parsing of certain invalid structures that can result
1798 in a denial of service. (CVE-2006-2937) [Steve Henson]
1800 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
1801 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
1803 *) Fix SSL client code which could crash if connecting to a
1804 malicious SSLv2 server. (CVE-2006-4343)
1805 [Tavis Ormandy and Will Drewry, Google Security Team]
1807 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
1808 match only those. Before that, "AES256-SHA" would be interpreted
1809 as a pattern and match "AES128-SHA" too (since AES128-SHA got
1810 the same strength classification in 0.9.7h) as we currently only
1811 have a single AES bit in the ciphersuite description bitmap.
1812 That change, however, also applied to ciphersuite strings such as
1813 "RC4-MD5" that intentionally matched multiple ciphersuites --
1814 namely, SSL 2.0 ciphersuites in addition to the more common ones
1815 from SSL 3.0/TLS 1.0.
1817 So we change the selection algorithm again: Naming an explicit
1818 ciphersuite selects this one ciphersuite, and any other similar
1819 ciphersuite (same bitmap) from *other* protocol versions.
1820 Thus, "RC4-MD5" again will properly select both the SSL 2.0
1821 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
1823 Since SSL 2.0 does not have any ciphersuites for which the
1824 128/256 bit distinction would be relevant, this works for now.
1825 The proper fix will be to use different bits for AES128 and
1826 AES256, which would have avoided the problems from the beginning;
1827 however, bits are scarce, so we can only do this in a new release
1828 (not just a patchlevel) when we can change the SSL_CIPHER
1829 definition to split the single 'unsigned long mask' bitmap into
1830 multiple values to extend the available space.
1834 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
1836 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
1837 (CVE-2006-4339) [Ben Laurie and Google Security Team]
1839 *) Add AES IGE and biIGE modes.
1842 *) Change the Unix randomness entropy gathering to use poll() when
1843 possible instead of select(), since the latter has some
1844 undesirable limitations.
1845 [Darryl Miles via Richard Levitte and Bodo Moeller]
1847 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
1848 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
1849 cannot be implicitly activated as part of, e.g., the "AES" alias.
1850 However, please upgrade to OpenSSL 0.9.9[-dev] for
1851 non-experimental use of the ECC ciphersuites to get TLS extension
1852 support, which is required for curve and point format negotiation
1853 to avoid potential handshake problems.
1856 *) Disable rogue ciphersuites:
1858 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
1859 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
1860 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
1862 The latter two were purportedly from
1863 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
1866 Also deactivate the remaining ciphersuites from
1867 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
1868 unofficial, and the ID has long expired.
1871 *) Fix RSA blinding Heisenbug (problems sometimes occured on
1872 dual-core machines) and other potential thread-safety issues.
1875 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
1876 versions), which is now available for royalty-free use
1877 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
1878 Also, add Camellia TLS ciphersuites from RFC 4132.
1880 To minimize changes between patchlevels in the OpenSSL 0.9.8
1881 series, Camellia remains excluded from compilation unless OpenSSL
1882 is configured with 'enable-camellia'.
1885 *) Disable the padding bug check when compression is in use. The padding
1886 bug check assumes the first packet is of even length, this is not
1887 necessarily true if compresssion is enabled and can result in false
1888 positives causing handshake failure. The actual bug test is ancient
1889 code so it is hoped that implementations will either have fixed it by
1890 now or any which still have the bug do not support compression.
1893 Changes between 0.9.8a and 0.9.8b [04 May 2006]
1895 *) When applying a cipher rule check to see if string match is an explicit
1896 cipher suite and only match that one cipher suite if it is.
1899 *) Link in manifests for VC++ if needed.
1900 [Austin Ziegler <halostatue@gmail.com>]
1902 *) Update support for ECC-based TLS ciphersuites according to
1903 draft-ietf-tls-ecc-12.txt with proposed changes (but without
1904 TLS extensions, which are supported starting with the 0.9.9
1905 branch, not in the OpenSSL 0.9.8 branch).
1908 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
1909 opaque EVP_CIPHER_CTX handling.
1912 *) Fixes and enhancements to zlib compression code. We now only use
1913 "zlib1.dll" and use the default __cdecl calling convention on Win32
1914 to conform with the standards mentioned here:
1915 http://www.zlib.net/DLL_FAQ.txt
1916 Static zlib linking now works on Windows and the new --with-zlib-include
1917 --with-zlib-lib options to Configure can be used to supply the location
1918 of the headers and library. Gracefully handle case where zlib library
1922 *) Several fixes and enhancements to the OID generation code. The old code
1923 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
1924 handle numbers larger than ULONG_MAX, truncated printing and had a
1925 non standard OBJ_obj2txt() behaviour.
1928 *) Add support for building of engines under engine/ as shared libraries
1929 under VC++ build system.
1932 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
1933 Hopefully, we will not see any false combination of paths any more.
1936 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
1938 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
1939 (part of SSL_OP_ALL). This option used to disable the
1940 countermeasure against man-in-the-middle protocol-version
1941 rollback in the SSL 2.0 server implementation, which is a bad
1942 idea. (CVE-2005-2969)
1944 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
1945 for Information Security, National Institute of Advanced Industrial
1946 Science and Technology [AIST], Japan)]
1948 *) Add two function to clear and return the verify parameter flags.
1951 *) Keep cipherlists sorted in the source instead of sorting them at
1952 runtime, thus removing the need for a lock.
1955 *) Avoid some small subgroup attacks in Diffie-Hellman.
1956 [Nick Mathewson and Ben Laurie]
1958 *) Add functions for well-known primes.
1961 *) Extended Windows CE support.
1962 [Satoshi Nakamura and Andy Polyakov]
1964 *) Initialize SSL_METHOD structures at compile time instead of during
1965 runtime, thus removing the need for a lock.
1968 *) Make PKCS7_decrypt() work even if no certificate is supplied by
1969 attempting to decrypt each encrypted key in turn. Add support to
1973 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
1975 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
1978 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
1981 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
1982 key into the same file any more.
1985 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
1988 *) Add -utf8 command line and config file option to 'ca'.
1989 [Stefan <stf@udoma.org]
1991 *) Removed the macro des_crypt(), as it seems to conflict with some
1992 libraries. Use DES_crypt().
1995 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
1996 involves renaming the source and generated shared-libs for
1997 both. The engines will accept the corrected or legacy ids
1998 ('ncipher' and '4758_cca' respectively) when binding. NB,
1999 this only applies when building 'shared'.
2000 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
2002 *) Add attribute functions to EVP_PKEY structure. Modify
2003 PKCS12_create() to recognize a CSP name attribute and
2004 use it. Make -CSP option work again in pkcs12 utility.
2007 *) Add new functionality to the bn blinding code:
2008 - automatic re-creation of the BN_BLINDING parameters after
2009 a fixed number of uses (currently 32)
2010 - add new function for parameter creation
2011 - introduce flags to control the update behaviour of the
2012 BN_BLINDING parameters
2013 - hide BN_BLINDING structure
2014 Add a second BN_BLINDING slot to the RSA structure to improve
2015 performance when a single RSA object is shared among several
2019 *) Add support for DTLS.
2020 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
2022 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
2023 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
2026 *) Remove buggy and incompletet DH cert support from
2027 ssl/ssl_rsa.c and ssl/s3_both.c
2030 *) Use SHA-1 instead of MD5 as the default digest algorithm for
2031 the apps/openssl applications.
2034 *) Compile clean with "-Wall -Wmissing-prototypes
2035 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
2036 DEBUG_SAFESTACK must also be set.
2039 *) Change ./Configure so that certain algorithms can be disabled by default.
2040 The new counterpiece to "no-xxx" is "enable-xxx".
2042 The patented RC5 and MDC2 algorithms will now be disabled unless
2043 "enable-rc5" and "enable-mdc2", respectively, are specified.
2045 (IDEA remains enabled despite being patented. This is because IDEA
2046 is frequently required for interoperability, and there is no license
2047 fee for non-commercial use. As before, "no-idea" can be used to
2048 avoid this algorithm.)
2052 *) Add processing of proxy certificates (see RFC 3820). This work was
2053 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
2054 EGEE (Enabling Grids for E-science in Europe).
2057 *) RC4 performance overhaul on modern architectures/implementations, such
2058 as Intel P4, IA-64 and AMD64.
2061 *) New utility extract-section.pl. This can be used specify an alternative
2062 section number in a pod file instead of having to treat each file as
2063 a separate case in Makefile. This can be done by adding two lines to the
2066 =for comment openssl_section:XXX
2068 The blank line is mandatory.
2072 *) New arguments -certform, -keyform and -pass for s_client and s_server
2073 to allow alternative format key and certificate files and passphrase
2077 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
2078 update associated structures and add various utility functions.
2080 Add new policy related verify parameters, include policy checking in
2081 standard verify code. Enhance 'smime' application with extra parameters
2082 to support policy checking and print out.
2085 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
2086 Nehemiah processors. These extensions support AES encryption in hardware
2087 as well as RNG (though RNG support is currently disabled).
2088 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
2090 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
2093 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
2094 [Andy Polyakov and a number of other people]
2096 *) Improved PowerPC platform support. Most notably BIGNUM assembler
2097 implementation contributed by IBM.
2098 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
2100 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
2101 exponent rather than 'unsigned long'. There is a corresponding change to
2102 the new 'rsa_keygen' element of the RSA_METHOD structure.
2103 [Jelte Jansen, Geoff Thorpe]
2105 *) Functionality for creating the initial serial number file is now
2106 moved from CA.pl to the 'ca' utility with a new option -create_serial.
2108 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
2109 number file to 1, which is bound to cause problems. To avoid
2110 the problems while respecting compatibility between different 0.9.7
2111 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
2112 CA.pl for serial number initialization. With the new release 0.9.8,
2113 we can fix the problem directly in the 'ca' utility.)
2116 *) Reduced header interdepencies by declaring more opaque objects in
2117 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
2118 give fewer recursive includes, which could break lazy source code - so
2119 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
2120 developers should define this symbol when building and using openssl to
2121 ensure they track the recommended behaviour, interfaces, [etc], but
2122 backwards-compatible behaviour prevails when this isn't defined.
2125 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
2128 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
2129 This will generate a random key of the appropriate length based on the
2130 cipher context. The EVP_CIPHER can provide its own random key generation
2131 routine to support keys of a specific form. This is used in the des and
2132 3des routines to generate a key of the correct parity. Update S/MIME
2133 code to use new functions and hence generate correct parity DES keys.
2134 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
2135 valid (weak or incorrect parity).
2138 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
2139 as looking them up. This is useful when the verified structure may contain
2140 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
2141 present unless the new PKCS7_NO_CRL flag is asserted.
2144 *) Extend ASN1 oid configuration module. It now additionally accepts the
2147 shortName = some long name, 1.2.3.4
2150 *) Reimplemented the BN_CTX implementation. There is now no more static
2151 limitation on the number of variables it can handle nor the depth of the
2152 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
2153 information can now expand as required, and rather than having a single
2154 static array of bignums, BN_CTX now uses a linked-list of such arrays
2155 allowing it to expand on demand whilst maintaining the usefulness of
2156 BN_CTX's "bundling".
2159 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
2160 to allow all RSA operations to function using a single BN_CTX.
2163 *) Preliminary support for certificate policy evaluation and checking. This
2164 is initially intended to pass the tests outlined in "Conformance Testing
2165 of Relying Party Client Certificate Path Processing Logic" v1.07.
2168 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
2169 remained unused and not that useful. A variety of other little bignum
2170 tweaks and fixes have also been made continuing on from the audit (see
2174 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
2175 associated ASN1, EVP and SSL functions and old ASN1 macros.
2178 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
2179 and this should never fail. So the return value from the use of
2180 BN_set_word() (which can fail due to needless expansion) is now deprecated;
2181 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
2184 *) BN_CTX_get() should return zero-valued bignums, providing the same
2185 initialised value as BN_new().
2186 [Geoff Thorpe, suggested by Ulf Möller]
2188 *) Support for inhibitAnyPolicy certificate extension.
2191 *) An audit of the BIGNUM code is underway, for which debugging code is
2192 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2193 is considered valid when processing BIGNUMs, and causes execution to
2194 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2195 further steps are taken to deliberately pollute unused data in BIGNUM
2196 structures to try and expose faulty code further on. For now, openssl will
2197 (in its default mode of operation) continue to tolerate the inconsistent
2198 forms that it has tolerated in the past, but authors and packagers should
2199 consider trying openssl and their own applications when compiled with
2200 these debugging symbols defined. It will help highlight potential bugs in
2201 their own code, and will improve the test coverage for OpenSSL itself. At
2202 some point, these tighter rules will become openssl's default to improve
2203 maintainability, though the assert()s and other overheads will remain only
2204 in debugging configurations. See bn.h for more details.
2205 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2207 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2208 that can only be obtained through BN_CTX_new() (which implicitly
2209 initialises it). The presence of this function only made it possible
2210 to overwrite an existing structure (and cause memory leaks).
2213 *) Because of the callback-based approach for implementing LHASH as a
2214 template type, lh_insert() adds opaque objects to hash-tables and
2215 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2216 to clean up those corresponding objects before destroying the hash table
2217 (and losing the object pointers). So some over-zealous constifications in
2218 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2219 objects as "const" and the lh_doall[_arg] callback wrappers are not
2220 prototyped to have "const" restrictions on the object pointers they are
2221 given (and so aren't required to cast them away any more).
2224 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2225 (speed) prefers to use its own implementation. The two implementations
2226 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2227 its object type properly exposed (MS_TM) instead of casting to/from "char
2228 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2229 aren't necessarily the greatest nomenclatures - but this is what was used
2230 internally to the implementation so I've used that for now.
2233 *) Ensure that deprecated functions do not get compiled when
2234 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2235 the self-tests were still using deprecated key-generation functions so
2236 these have been updated also.
2239 *) Reorganise PKCS#7 code to separate the digest location functionality
2240 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2241 New function PKCS7_set_digest() to set the digest type for PKCS#7
2242 digestedData type. Add additional code to correctly generate the
2243 digestedData type and add support for this type in PKCS7 initialization
2247 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2248 structure of type "other".
2251 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2252 sure the loop does correctly stop and breaking ("division by zero")
2253 modulus operations are not performed. The (pre-generated) prime
2254 table crypto/bn/bn_prime.h was already correct, but it could not be
2255 re-generated on some platforms because of the "division by zero"
2256 situation in the script.
2257 [Ralf S. Engelschall]
2259 *) Update support for ECC-based TLS ciphersuites according to
2260 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2261 SHA-1 now is only used for "small" curves (where the
2262 representation of a field element takes up to 24 bytes); for
2263 larger curves, the field element resulting from ECDH is directly
2264 used as premaster secret.
2265 [Douglas Stebila (Sun Microsystems Laboratories)]
2267 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2268 curve secp160r1 to the tests.
2269 [Douglas Stebila (Sun Microsystems Laboratories)]
2271 *) Add the possibility to load symbols globally with DSO.
2272 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
2274 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
2275 control of the error stack.
2278 *) Add support for STORE in ENGINE.
2281 *) Add the STORE type. The intention is to provide a common interface
2282 to certificate and key stores, be they simple file-based stores, or
2283 HSM-type store, or LDAP stores, or...
2284 NOTE: The code is currently UNTESTED and isn't really used anywhere.
2287 *) Add a generic structure called OPENSSL_ITEM. This can be used to
2288 pass a list of arguments to any function as well as provide a way
2289 for a function to pass data back to the caller.
2292 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
2293 works like BUF_strdup() but can be used to duplicate a portion of
2294 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
2298 *) Add the function sk_find_ex() which works like sk_find(), but will
2299 return an index to an element even if an exact match couldn't be
2300 found. The index is guaranteed to point at the element where the
2301 searched-for key would be inserted to preserve sorting order.
2304 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
2305 takes an extra flags argument for optional functionality. Currently,
2306 the following flags are defined:
2308 OBJ_BSEARCH_VALUE_ON_NOMATCH
2309 This one gets OBJ_bsearch_ex() to return a pointer to the first
2310 element where the comparing function returns a negative or zero
2313 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
2314 This one gets OBJ_bsearch_ex() to return a pointer to the first
2315 element where the comparing function returns zero. This is useful
2316 if there are more than one element where the comparing function
2320 *) Make it possible to create self-signed certificates with 'openssl ca'
2321 in such a way that the self-signed certificate becomes part of the
2322 CA database and uses the same mechanisms for serial number generation
2323 as all other certificate signing. The new flag '-selfsign' enables
2324 this functionality. Adapt CA.sh and CA.pl.in.
2327 *) Add functionality to check the public key of a certificate request
2328 against a given private. This is useful to check that a certificate
2329 request can be signed by that key (self-signing).
2332 *) Make it possible to have multiple active certificates with the same
2333 subject in the CA index file. This is done only if the keyword
2334 'unique_subject' is set to 'no' in the main CA section (default
2335 if 'CA_default') of the configuration file. The value is saved
2336 with the database itself in a separate index attribute file,
2337 named like the index file with '.attr' appended to the name.
2340 *) Generate muti valued AVAs using '+' notation in config files for
2344 *) Support for nameConstraints certificate extension.
2347 *) Support for policyConstraints certificate extension.
2350 *) Support for policyMappings certificate extension.
2353 *) Make sure the default DSA_METHOD implementation only uses its
2354 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
2355 and change its own handlers to be NULL so as to remove unnecessary
2356 indirection. This lets alternative implementations fallback to the
2357 default implementation more easily.
2360 *) Support for directoryName in GeneralName related extensions
2364 *) Make it possible to link applications using Makefile.shared.
2365 Make that possible even when linking against static libraries!
2368 *) Support for single pass processing for S/MIME signing. This now
2369 means that S/MIME signing can be done from a pipe, in addition
2370 cleartext signing (multipart/signed type) is effectively streaming
2371 and the signed data does not need to be all held in memory.
2373 This is done with a new flag PKCS7_STREAM. When this flag is set
2374 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
2375 is done after the data is output (and digests calculated) in
2376 SMIME_write_PKCS7().
2379 *) Add full support for -rpath/-R, both in shared libraries and
2380 applications, at least on the platforms where it's known how
2384 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
2385 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
2386 will now compute a table of multiples of the generator that
2387 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
2388 faster (notably in the case of a single point multiplication,
2389 scalar * generator).
2390 [Nils Larsch, Bodo Moeller]
2392 *) IPv6 support for certificate extensions. The various extensions
2393 which use the IP:a.b.c.d can now take IPv6 addresses using the
2394 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
2398 *) Added an ENGINE that implements RSA by performing private key
2399 exponentiations with the GMP library. The conversions to and from
2400 GMP's mpz_t format aren't optimised nor are any montgomery forms
2401 cached, and on x86 it appears OpenSSL's own performance has caught up.
2402 However there are likely to be other architectures where GMP could
2403 provide a boost. This ENGINE is not built in by default, but it can be
2404 specified at Configure time and should be accompanied by the necessary
2405 linker additions, eg;
2406 ./config -DOPENSSL_USE_GMP -lgmp
2409 *) "openssl engine" will not display ENGINE/DSO load failure errors when
2410 testing availability of engines with "-t" - the old behaviour is
2411 produced by increasing the feature's verbosity with "-tt".
2414 *) ECDSA routines: under certain error conditions uninitialized BN objects
2415 could be freed. Solution: make sure initialization is performed early
2416 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
2420 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
2421 and DH_METHOD (eg. by ENGINE implementations) to override the normal
2422 software implementations. For DSA and DH, parameter generation can
2423 also be overriden by providing the appropriate method callbacks.
2426 *) Change the "progress" mechanism used in key-generation and
2427 primality testing to functions that take a new BN_GENCB pointer in
2428 place of callback/argument pairs. The new API functions have "_ex"
2429 postfixes and the older functions are reimplemented as wrappers for
2430 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
2431 declarations of the old functions to help (graceful) attempts to
2432 migrate to the new functions. Also, the new key-generation API
2433 functions operate on a caller-supplied key-structure and return
2434 success/failure rather than returning a key or NULL - this is to
2435 help make "keygen" another member function of RSA_METHOD etc.
2437 Example for using the new callback interface:
2439 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
2443 BN_GENCB_set(&my_cb, my_callback, my_arg);
2445 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
2446 /* For the meaning of a, b in calls to my_callback(), see the
2447 * documentation of the function that calls the callback.
2448 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
2449 * my_callback should return 1 if it wants BN_is_prime_ex()
2450 * to continue, or 0 to stop.
2455 *) Change the ZLIB compression method to be stateful, and make it
2456 available to TLS with the number defined in
2457 draft-ietf-tls-compression-04.txt.
2460 *) Add the ASN.1 structures and functions for CertificatePair, which
2461 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
2463 CertificatePair ::= SEQUENCE {
2464 forward [0] Certificate OPTIONAL,
2465 reverse [1] Certificate OPTIONAL,
2466 -- at least one of the pair shall be present -- }
2468 Also implement the PEM functions to read and write certificate
2469 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
2471 This needed to be defined, mostly for the sake of the LDAP
2472 attribute crossCertificatePair, but may prove useful elsewhere as
2476 *) Make it possible to inhibit symlinking of shared libraries in
2477 Makefile.shared, for Cygwin's sake.
2480 *) Extend the BIGNUM API by creating a function
2481 void BN_set_negative(BIGNUM *a, int neg);
2482 and a macro that behave like
2483 int BN_is_negative(const BIGNUM *a);
2485 to avoid the need to access 'a->neg' directly in applications.
2488 *) Implement fast modular reduction for pseudo-Mersenne primes
2489 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
2490 EC_GROUP_new_curve_GFp() will now automatically use this
2492 [Nils Larsch <nla@trustcenter.de>]
2494 *) Add new lock type (CRYPTO_LOCK_BN).
2497 *) Change the ENGINE framework to automatically load engines
2498 dynamically from specific directories unless they could be
2499 found to already be built in or loaded. Move all the
2500 current engines except for the cryptodev one to a new
2502 The engines in engines/ are built as shared libraries if
2503 the "shared" options was given to ./Configure or ./config.
2504 Otherwise, they are inserted in libcrypto.a.
2505 /usr/local/ssl/engines is the default directory for dynamic
2506 engines, but that can be overriden at configure time through
2507 the usual use of --prefix and/or --openssldir, and at run
2508 time with the environment variable OPENSSL_ENGINES.
2509 [Geoff Thorpe and Richard Levitte]
2511 *) Add Makefile.shared, a helper makefile to build shared
2512 libraries. Addapt Makefile.org.
2515 *) Add version info to Win32 DLLs.
2516 [Peter 'Luna' Runestig" <peter@runestig.com>]
2518 *) Add new 'medium level' PKCS#12 API. Certificates and keys
2519 can be added using this API to created arbitrary PKCS#12
2520 files while avoiding the low level API.
2522 New options to PKCS12_create(), key or cert can be NULL and
2523 will then be omitted from the output file. The encryption
2524 algorithm NIDs can be set to -1 for no encryption, the mac
2525 iteration count can be set to 0 to omit the mac.
2527 Enhance pkcs12 utility by making the -nokeys and -nocerts
2528 options work when creating a PKCS#12 file. New option -nomac
2529 to omit the mac, NONE can be set for an encryption algorithm.
2530 New code is modified to use the enhanced PKCS12_create()
2531 instead of the low level API.
2534 *) Extend ASN1 encoder to support indefinite length constructed
2535 encoding. This can output sequences tags and octet strings in
2536 this form. Modify pk7_asn1.c to support indefinite length
2537 encoding. This is experimental and needs additional code to
2538 be useful, such as an ASN1 bio and some enhanced streaming
2541 Extend template encode functionality so that tagging is passed
2542 down to the template encoder.
2545 *) Let 'openssl req' fail if an argument to '-newkey' is not
2546 recognized instead of using RSA as a default.
2549 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
2550 As these are not official, they are not included in "ALL";
2551 the "ECCdraft" ciphersuite group alias can be used to select them.
2552 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
2554 *) Add ECDH engine support.
2555 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
2557 *) Add ECDH in new directory crypto/ecdh/.
2558 [Douglas Stebila (Sun Microsystems Laboratories)]
2560 *) Let BN_rand_range() abort with an error after 100 iterations
2561 without success (which indicates a broken PRNG).
2564 *) Change BN_mod_sqrt() so that it verifies that the input value
2565 is really the square of the return value. (Previously,
2566 BN_mod_sqrt would show GIGO behaviour.)
2569 *) Add named elliptic curves over binary fields from X9.62, SECG,
2570 and WAP/WTLS; add OIDs that were still missing.
2572 [Sheueling Chang Shantz and Douglas Stebila
2573 (Sun Microsystems Laboratories)]
2575 *) Extend the EC library for elliptic curves over binary fields
2576 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
2579 EC_GF2m_simple_method
2583 EC_GROUP_new_curve_GF2m
2584 EC_GROUP_set_curve_GF2m
2585 EC_GROUP_get_curve_GF2m
2586 EC_POINT_set_affine_coordinates_GF2m
2587 EC_POINT_get_affine_coordinates_GF2m
2588 EC_POINT_set_compressed_coordinates_GF2m
2590 Point compression for binary fields is disabled by default for
2591 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
2594 As binary polynomials are represented as BIGNUMs, various members
2595 of the EC_GROUP and EC_POINT data structures can be shared
2596 between the implementations for prime fields and binary fields;
2597 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
2598 are essentially identical to their ..._GFp counterparts.
2599 (For simplicity, the '..._GFp' prefix has been dropped from
2600 various internal method names.)
2602 An internal 'field_div' method (similar to 'field_mul' and
2603 'field_sqr') has been added; this is used only for binary fields.
2605 [Sheueling Chang Shantz and Douglas Stebila
2606 (Sun Microsystems Laboratories)]
2608 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
2609 through methods ('mul', 'precompute_mult').
2611 The generic implementations (now internally called 'ec_wNAF_mul'
2612 and 'ec_wNAF_precomputed_mult') remain the default if these
2613 methods are undefined.
2615 [Sheueling Chang Shantz and Douglas Stebila
2616 (Sun Microsystems Laboratories)]
2618 *) New function EC_GROUP_get_degree, which is defined through
2619 EC_METHOD. For curves over prime fields, this returns the bit
2620 length of the modulus.
2622 [Sheueling Chang Shantz and Douglas Stebila
2623 (Sun Microsystems Laboratories)]
2625 *) New functions EC_GROUP_dup, EC_POINT_dup.
2626 (These simply call ..._new and ..._copy).
2628 [Sheueling Chang Shantz and Douglas Stebila
2629 (Sun Microsystems Laboratories)]
2631 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
2632 Polynomials are represented as BIGNUMs (where the sign bit is not
2633 used) in the following functions [macros]:
2636 BN_GF2m_sub [= BN_GF2m_add]
2637 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
2638 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
2639 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
2641 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
2642 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
2643 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
2644 BN_GF2m_cmp [= BN_ucmp]
2646 (Note that only the 'mod' functions are actually for fields GF(2^m).
2647 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
2649 For some functions, an the irreducible polynomial defining a
2650 field can be given as an 'unsigned int[]' with strictly
2651 decreasing elements giving the indices of those bits that are set;
2652 i.e., p[] represents the polynomial
2653 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
2655 p[0] > p[1] > ... > p[k] = 0.
2656 This applies to the following functions:
2661 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
2662 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
2664 BN_GF2m_mod_sqrt_arr
2665 BN_GF2m_mod_solve_quad_arr
2669 Conversion can be performed by the following functions:
2674 bntest.c has additional tests for binary polynomial arithmetic.
2676 Two implementations for BN_GF2m_mod_div() are available.
2677 The default algorithm simply uses BN_GF2m_mod_inv() and
2678 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
2679 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
2680 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
2682 [Sheueling Chang Shantz and Douglas Stebila
2683 (Sun Microsystems Laboratories)]
2685 *) Add new error code 'ERR_R_DISABLED' that can be used when some
2686 functionality is disabled at compile-time.
2687 [Douglas Stebila <douglas.stebila@sun.com>]
2689 *) Change default behaviour of 'openssl asn1parse' so that more
2690 information is visible when viewing, e.g., a certificate:
2692 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
2693 mode the content of non-printable OCTET STRINGs is output in a
2694 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
2695 avoid the appearance of a printable string.
2696 [Nils Larsch <nla@trustcenter.de>]
2698 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
2700 EC_GROUP_set_asn1_flag()
2701 EC_GROUP_get_asn1_flag()
2702 EC_GROUP_set_point_conversion_form()
2703 EC_GROUP_get_point_conversion_form()
2704 These control ASN1 encoding details:
2705 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
2706 has been set to OPENSSL_EC_NAMED_CURVE.
2707 - Points are encoded in uncompressed form by default; options for
2708 asn1_for are as for point2oct, namely
2709 POINT_CONVERSION_COMPRESSED
2710 POINT_CONVERSION_UNCOMPRESSED
2711 POINT_CONVERSION_HYBRID
2713 Also add 'seed' and 'seed_len' members to EC_GROUP with access
2716 EC_GROUP_get0_seed()
2717 EC_GROUP_get_seed_len()
2718 This is used only for ASN1 purposes (so far).
2719 [Nils Larsch <nla@trustcenter.de>]
2721 *) Add 'field_type' member to EC_METHOD, which holds the NID
2722 of the appropriate field type OID. The new function
2723 EC_METHOD_get_field_type() returns this value.
2724 [Nils Larsch <nla@trustcenter.de>]
2729 EC_POINT_point2hex()
2730 EC_POINT_hex2point()
2731 providing useful interfaces to EC_POINT_point2oct() and
2732 EC_POINT_oct2point().
2733 [Nils Larsch <nla@trustcenter.de>]
2735 *) Change internals of the EC library so that the functions
2736 EC_GROUP_set_generator()
2737 EC_GROUP_get_generator()
2738 EC_GROUP_get_order()
2739 EC_GROUP_get_cofactor()
2740 are implemented directly in crypto/ec/ec_lib.c and not dispatched
2741 to methods, which would lead to unnecessary code duplication when
2742 adding different types of curves.
2743 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
2745 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
2746 arithmetic, and such that modified wNAFs are generated
2747 (which avoid length expansion in many cases).
2750 *) Add a function EC_GROUP_check_discriminant() (defined via
2751 EC_METHOD) that verifies that the curve discriminant is non-zero.
2753 Add a function EC_GROUP_check() that makes some sanity tests
2754 on a EC_GROUP, its generator and order. This includes
2755 EC_GROUP_check_discriminant().
2756 [Nils Larsch <nla@trustcenter.de>]
2758 *) Add ECDSA in new directory crypto/ecdsa/.
2760 Add applications 'openssl ecparam' and 'openssl ecdsa'
2761 (these are based on 'openssl dsaparam' and 'openssl dsa').
2763 ECDSA support is also included in various other files across the
2764 library. Most notably,
2765 - 'openssl req' now has a '-newkey ecdsa:file' option;
2766 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
2767 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
2768 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
2769 them suitable for ECDSA where domain parameters must be
2770 extracted before the specific public key;
2771 - ECDSA engine support has been added.
2772 [Nils Larsch <nla@trustcenter.de>]
2774 *) Include some named elliptic curves, and add OIDs from X9.62,
2775 SECG, and WAP/WTLS. Each curve can be obtained from the new
2777 EC_GROUP_new_by_curve_name(),
2778 and the list of available named curves can be obtained with
2779 EC_get_builtin_curves().
2780 Also add a 'curve_name' member to EC_GROUP objects, which can be
2782 EC_GROUP_set_curve_name()
2783 EC_GROUP_get_curve_name()
2784 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
2786 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
2787 was actually never needed) and in BN_mul(). The removal in BN_mul()
2788 required a small change in bn_mul_part_recursive() and the addition
2789 of the functions bn_cmp_part_words(), bn_sub_part_words() and
2790 bn_add_part_words(), which do the same thing as bn_cmp_words(),
2791 bn_sub_words() and bn_add_words() except they take arrays with
2795 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
2797 *) Cleanse PEM buffers before freeing them since they may contain
2799 [Benjamin Bennett <ben@psc.edu>]
2801 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2802 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2803 authentication-only ciphersuites.
2806 *) Since AES128 and AES256 share a single mask bit in the logic of
2807 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2808 kludge to work properly if AES128 is available and AES256 isn't.
2811 *) Expand security boundary to match 1.1.1 module.
2814 *) Remove redundant features: hash file source, editing of test vectors
2815 modify fipsld to use external fips_premain.c signature.
2818 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
2819 run algorithm test programs.
2822 *) Make algorithm test programs more tolerant of whitespace.
2825 *) Have SSL/TLS server implementation tolerate "mismatched" record
2826 protocol version while receiving ClientHello even if the
2827 ClientHello is fragmented. (The server can't insist on the
2828 particular protocol version it has chosen before the ServerHello
2829 message has informed the client about his choice.)
2832 *) Load error codes if they are not already present instead of using a
2833 static variable. This allows them to be cleanly unloaded and reloaded.
2836 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
2838 *) Introduce limits to prevent malicious keys being able to
2839 cause a denial of service. (CVE-2006-2940)
2840 [Steve Henson, Bodo Moeller]
2842 *) Fix ASN.1 parsing of certain invalid structures that can result
2843 in a denial of service. (CVE-2006-2937) [Steve Henson]
2845 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2846 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2848 *) Fix SSL client code which could crash if connecting to a
2849 malicious SSLv2 server. (CVE-2006-4343)
2850 [Tavis Ormandy and Will Drewry, Google Security Team]
2852 *) Change ciphersuite string processing so that an explicit
2853 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
2854 will no longer include "AES128-SHA"), and any other similar
2855 ciphersuite (same bitmap) from *other* protocol versions (so that
2856 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
2857 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
2858 changes from 0.9.8b and 0.9.8d.
2861 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
2863 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2864 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2866 *) Change the Unix randomness entropy gathering to use poll() when
2867 possible instead of select(), since the latter has some
2868 undesirable limitations.
2869 [Darryl Miles via Richard Levitte and Bodo Moeller]
2871 *) Disable rogue ciphersuites:
2873 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
2874 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
2875 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
2877 The latter two were purportedly from
2878 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
2881 Also deactive the remaining ciphersuites from
2882 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
2883 unofficial, and the ID has long expired.
2886 *) Fix RSA blinding Heisenbug (problems sometimes occured on
2887 dual-core machines) and other potential thread-safety issues.
2890 Changes between 0.9.7i and 0.9.7j [04 May 2006]
2892 *) Adapt fipsld and the build system to link against the validated FIPS
2893 module in FIPS mode.
2896 *) Fixes for VC++ 2005 build under Windows.
2899 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
2900 from a Windows bash shell such as MSYS. It is autodetected from the
2901 "config" script when run from a VC++ environment. Modify standard VC++
2902 build to use fipscanister.o from the GNU make build.
2905 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
2907 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
2908 The value now differs depending on if you build for FIPS or not.
2909 BEWARE! A program linked with a shared FIPSed libcrypto can't be
2910 safely run with a non-FIPSed libcrypto, as it may crash because of
2911 the difference induced by this change.
2914 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
2916 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2917 (part of SSL_OP_ALL). This option used to disable the
2918 countermeasure against man-in-the-middle protocol-version
2919 rollback in the SSL 2.0 server implementation, which is a bad
2920 idea. (CVE-2005-2969)
2922 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2923 for Information Security, National Institute of Advanced Industrial
2924 Science and Technology [AIST], Japan)]
2926 *) Minimal support for X9.31 signatures and PSS padding modes. This is
2927 mainly for FIPS compliance and not fully integrated at this stage.
2930 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
2931 the exponentiation using a fixed-length exponent. (Otherwise,
2932 the information leaked through timing could expose the secret key
2933 after many signatures; cf. Bleichenbacher's attack on DSA with
2937 *) Make a new fixed-window mod_exp implementation the default for
2938 RSA, DSA, and DH private-key operations so that the sequence of
2939 squares and multiplies and the memory access pattern are
2940 independent of the particular secret key. This will mitigate
2941 cache-timing and potential related attacks.
2943 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
2944 and this is automatically used by BN_mod_exp_mont() if the new flag
2945 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
2946 will use this BN flag for private exponents unless the flag
2947 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
2948 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
2950 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
2952 *) Change the client implementation for SSLv23_method() and
2953 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
2954 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
2955 (Previously, the SSL 2.0 backwards compatible Client Hello
2956 message format would be used even with SSL_OP_NO_SSLv2.)
2959 *) Add support for smime-type MIME parameter in S/MIME messages which some
2963 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
2964 a threadsafe manner. Modify rsa code to use new function and add calls
2965 to dsa and dh code (which had race conditions before).
2968 *) Include the fixed error library code in the C error file definitions
2969 instead of fixing them up at runtime. This keeps the error code
2970 structures constant.
2973 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
2975 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
2978 *) Fixes for newer kerberos headers. NB: the casts are needed because
2979 the 'length' field is signed on one version and unsigned on another
2980 with no (?) obvious way to tell the difference, without these VC++
2981 complains. Also the "definition" of FAR (blank) is no longer included
2982 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
2983 some needed definitions.
2986 *) Undo Cygwin change.
2989 *) Added support for proxy certificates according to RFC 3820.
2990 Because they may be a security thread to unaware applications,
2991 they must be explicitely allowed in run-time. See
2992 docs/HOWTO/proxy_certificates.txt for further information.
2995 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
2997 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
2998 server and client random values. Previously
2999 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
3000 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
3002 This change has negligible security impact because:
3004 1. Server and client random values still have 24 bytes of pseudo random
3007 2. Server and client random values are sent in the clear in the initial
3010 3. The master secret is derived using the premaster secret (48 bytes in
3011 size for static RSA ciphersuites) as well as client server and random
3014 The OpenSSL team would like to thank the UK NISCC for bringing this issue
3017 [Stephen Henson, reported by UK NISCC]
3019 *) Use Windows randomness collection on Cygwin.
3022 *) Fix hang in EGD/PRNGD query when communication socket is closed
3023 prematurely by EGD/PRNGD.
3024 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
3026 *) Prompt for pass phrases when appropriate for PKCS12 input format.
3029 *) Back-port of selected performance improvements from development
3030 branch, as well as improved support for PowerPC platforms.
3033 *) Add lots of checks for memory allocation failure, error codes to indicate
3034 failure and freeing up memory if a failure occurs.
3035 [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
3037 *) Add new -passin argument to dgst.
3040 *) Perform some character comparisons of different types in X509_NAME_cmp:
3041 this is needed for some certificates that reencode DNs into UTF8Strings
3042 (in violation of RFC3280) and can't or wont issue name rollover
3046 *) Make an explicit check during certificate validation to see that
3047 the CA setting in each certificate on the chain is correct. As a
3048 side effect always do the following basic checks on extensions,
3049 not just when there's an associated purpose to the check:
3051 - if there is an unhandled critical extension (unless the user
3052 has chosen to ignore this fault)
3053 - if the path length has been exceeded (if one is set at all)
3054 - that certain extensions fit the associated purpose (if one has
3058 Changes between 0.9.7d and 0.9.7e [25 Oct 2004]
3060 *) Avoid a race condition when CRLs are checked in a multi threaded
3061 environment. This would happen due to the reordering of the revoked
3062 entries during signature checking and serial number lookup. Now the
3063 encoding is cached and the serial number sort performed under a lock.
3064 Add new STACK function sk_is_sorted().
3067 *) Add Delta CRL to the extension code.
3070 *) Various fixes to s3_pkt.c so alerts are sent properly.
3071 [David Holmes <d.holmes@f5.com>]
3073 *) Reduce the chances of duplicate issuer name and serial numbers (in
3074 violation of RFC3280) using the OpenSSL certificate creation utilities.
3075 This is done by creating a random 64 bit value for the initial serial
3076 number when a serial number file is created or when a self signed
3077 certificate is created using 'openssl req -x509'. The initial serial
3078 number file is created using 'openssl x509 -next_serial' in CA.pl
3079 rather than being initialized to 1.
3082 Changes between 0.9.7c and 0.9.7d [17 Mar 2004]
3084 *) Fix null-pointer assignment in do_change_cipher_spec() revealed
3085 by using the Codenomicon TLS Test Tool (CVE-2004-0079)
3086 [Joe Orton, Steve Henson]
3088 *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
3090 [Joe Orton, Steve Henson]
3092 *) Make it possible to have multiple active certificates with the same
3093 subject in the CA index file. This is done only if the keyword
3094 'unique_subject' is set to 'no' in the main CA section (default
3095 if 'CA_default') of the configuration file. The value is saved
3096 with the database itself in a separate index attribute file,
3097 named like the index file with '.attr' appended to the name.
3100 *) X509 verify fixes. Disable broken certificate workarounds when
3101 X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
3102 keyUsage extension present. Don't accept CRLs with unhandled critical
3103 extensions: since verify currently doesn't process CRL extensions this
3104 rejects a CRL with *any* critical extensions. Add new verify error codes
3108 *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
3109 A clarification of RFC2560 will require the use of OCTET STRINGs and
3110 some implementations cannot handle the current raw format. Since OpenSSL
3111 copies and compares OCSP nonces as opaque blobs without any attempt at
3112 parsing them this should not create any compatibility issues.
3115 *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
3116 calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
3117 this HMAC (and other) operations are several times slower than OpenSSL
3121 *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
3122 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3124 *) Use the correct content when signing type "other".
3127 Changes between 0.9.7b and 0.9.7c [30 Sep 2003]
3129 *) Fix various bugs revealed by running the NISCC test suite:
3131 Stop out of bounds reads in the ASN1 code when presented with
3132 invalid tags (CVE-2003-0543 and CVE-2003-0544).
3134 Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
3136 If verify callback ignores invalid public key errors don't try to check
3137 certificate signature with the NULL public key.
3141 *) New -ignore_err option in ocsp application to stop the server
3142 exiting on the first error in a request.
3145 *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
3146 if the server requested one: as stated in TLS 1.0 and SSL 3.0
3150 *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
3151 extra data after the compression methods not only for TLS 1.0
3152 but also for SSL 3.0 (as required by the specification).
3153 [Bodo Moeller; problem pointed out by Matthias Loepfe]
3155 *) Change X509_certificate_type() to mark the key as exported/exportable
3156 when it's 512 *bits* long, not 512 bytes.
3159 *) Change AES_cbc_encrypt() so it outputs exact multiple of
3160 blocks during encryption.
3163 *) Various fixes to base64 BIO and non blocking I/O. On write
3164 flushes were not handled properly if the BIO retried. On read
3165 data was not being buffered properly and had various logic bugs.
3166 This also affects blocking I/O when the data being decoded is a
3170 *) Various S/MIME bugfixes and compatibility changes:
3171 output correct application/pkcs7 MIME type if
3172 PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
3173 Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
3174 of files as .eml work). Correctly handle very long lines in MIME
3178 Changes between 0.9.7a and 0.9.7b [10 Apr 2003]
3180 *) Countermeasure against the Klima-Pokorny-Rosa extension of
3181 Bleichbacher's attack on PKCS #1 v1.5 padding: treat
3182 a protocol version number mismatch like a decryption error
3183 in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
3186 *) Turn on RSA blinding by default in the default implementation
3187 to avoid a timing attack. Applications that don't want it can call
3188 RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
3189 They would be ill-advised to do so in most cases.
3190 [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
3192 *) Change RSA blinding code so that it works when the PRNG is not
3193 seeded (in this case, the secret RSA exponent is abused as
3194 an unpredictable seed -- if it is not unpredictable, there
3195 is no point in blinding anyway). Make RSA blinding thread-safe
3196 by remembering the creator's thread ID in rsa->blinding and
3197 having all other threads use local one-time blinding factors
3198 (this requires more computation than sharing rsa->blinding, but
3199 avoids excessive locking; and if an RSA object is not shared
3200 between threads, blinding will still be very fast).
3203 *) Fixed a typo bug that would cause ENGINE_set_default() to set an
3204 ENGINE as defaults for all supported algorithms irrespective of
3205 the 'flags' parameter. 'flags' is now honoured, so applications
3206 should make sure they are passing it correctly.
3209 *) Target "mingw" now allows native Windows code to be generated in
3210 the Cygwin environment as well as with the MinGW compiler.
3213 Changes between 0.9.7 and 0.9.7a [19 Feb 2003]
3215 *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
3216 via timing by performing a MAC computation even if incorrrect
3217 block cipher padding has been found. This is a countermeasure
3218 against active attacks where the attacker has to distinguish
3219 between bad padding and a MAC verification error. (CVE-2003-0078)
3221 [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
3222 Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
3223 Martin Vuagnoux (EPFL, Ilion)]
3225 *) Make the no-err option work as intended. The intention with no-err
3226 is not to have the whole error stack handling routines removed from
3227 libcrypto, it's only intended to remove all the function name and
3228 reason texts, thereby removing some of the footprint that may not
3229 be interesting if those errors aren't displayed anyway.
3231 NOTE: it's still possible for any application or module to have it's
3232 own set of error texts inserted. The routines are there, just not
3233 used by default when no-err is given.
3236 *) Add support for FreeBSD on IA64.
3237 [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
3239 *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
3240 Kerberos function mit_des_cbc_cksum(). Before this change,
3241 the value returned by DES_cbc_cksum() was like the one from
3242 mit_des_cbc_cksum(), except the bytes were swapped.
3243 [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
3245 *) Allow an application to disable the automatic SSL chain building.
3246 Before this a rather primitive chain build was always performed in
3247 ssl3_output_cert_chain(): an application had no way to send the
3248 correct chain if the automatic operation produced an incorrect result.
3250 Now the chain builder is disabled if either:
3252 1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
3254 2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
3256 The reasoning behind this is that an application would not want the
3257 auto chain building to take place if extra chain certificates are
3258 present and it might also want a means of sending no additional
3259 certificates (for example the chain has two certificates and the
3263 *) Add the possibility to build without the ENGINE framework.
3264 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3266 *) Under Win32 gmtime() can return NULL: check return value in
3267 OPENSSL_gmtime(). Add error code for case where gmtime() fails.
3270 *) DSA routines: under certain error conditions uninitialized BN objects
3271 could be freed. Solution: make sure initialization is performed early
3272 enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
3273 Nils Larsch <nla@trustcenter.de> via PR#459)
3276 *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
3277 checked on reconnect on the client side, therefore session resumption
3278 could still fail with a "ssl session id is different" error. This
3279 behaviour is masked when SSL_OP_ALL is used due to
3280 SSL_OP_MICROSOFT_SESS_ID_BUG being set.
3281 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3282 followup to PR #377.
3285 *) IA-32 assembler support enhancements: unified ELF targets, support
3286 for SCO/Caldera platforms, fix for Cygwin shared build.
3289 *) Add support for FreeBSD on sparc64. As a consequence, support for
3290 FreeBSD on non-x86 processors is separate from x86 processors on
3291 the config script, much like the NetBSD support.
3292 [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
3294 Changes between 0.9.6h and 0.9.7 [31 Dec 2002]
3296 [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
3299 *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
3300 code (06) was taken as the first octet of the session ID and the last
3301 octet was ignored consequently. As a result SSLv2 client side session
3302 caching could not have worked due to the session ID mismatch between
3304 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3308 *) Change the declaration of needed Kerberos libraries to use EX_LIBS
3309 instead of the special (and badly supported) LIBKRB5. LIBKRB5 is
3313 *) The hw_ncipher.c engine requires dynamic locks. Unfortunately, it
3314 seems that in spite of existing for more than a year, many application
3315 author have done nothing to provide the necessary callbacks, which
3316 means that this particular engine will not work properly anywhere.
3317 This is a very unfortunate situation which forces us, in the name
3318 of usability, to give the hw_ncipher.c a static lock, which is part
3320 NOTE: This is for the 0.9.7 series ONLY. This hack will never
3321 appear in 0.9.8 or later. We EXPECT application authors to have
3322 dealt properly with this when 0.9.8 is released (unless we actually
3323 make such changes in the libcrypto locking code that changes will
3324 have to be made anyway).
3327 *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
3328 octets have been read, EOF or an error occurs. Without this change
3329 some truncated ASN1 structures will not produce an error.
3332 *) Disable Heimdal support, since it hasn't been fully implemented.
3333 Still give the possibility to force the use of Heimdal, but with
3334 warnings and a request that patches get sent to openssl-dev.
3337 *) Add the VC-CE target, introduce the WINCE sysname, and add
3338 INSTALL.WCE and appropriate conditionals to make it build.
3339 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3341 *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
3342 cygssl-x.y.z.dll, where x, y and z are the major, minor and
3343 edit numbers of the version.
3344 [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
3346 *) Introduce safe string copy and catenation functions
3347 (BUF_strlcpy() and BUF_strlcat()).
3348 [Ben Laurie (CHATS) and Richard Levitte]
3350 *) Avoid using fixed-size buffers for one-line DNs.
3351 [Ben Laurie (CHATS)]
3353 *) Add BUF_MEM_grow_clean() to avoid information leakage when
3354 resizing buffers containing secrets, and use where appropriate.
3355 [Ben Laurie (CHATS)]
3357 *) Avoid using fixed size buffers for configuration file location.
3358 [Ben Laurie (CHATS)]
3360 *) Avoid filename truncation for various CA files.
3361 [Ben Laurie (CHATS)]
3363 *) Use sizeof in preference to magic numbers.
3364 [Ben Laurie (CHATS)]
3366 *) Avoid filename truncation in cert requests.
3367 [Ben Laurie (CHATS)]
3369 *) Add assertions to check for (supposedly impossible) buffer
3371 [Ben Laurie (CHATS)]
3373 *) Don't cache truncated DNS entries in the local cache (this could
3374 potentially lead to a spoofing attack).
3375 [Ben Laurie (CHATS)]
3377 *) Fix various buffers to be large enough for hex/decimal
3378 representations in a platform independent manner.
3379 [Ben Laurie (CHATS)]
3381 *) Add CRYPTO_realloc_clean() to avoid information leakage when
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