5 Changes between 1.0.0 and 1.1.0 [xx XXX xxxx]
7 *) New -sigopt option to the req and x509 utilities. Additional
8 signature parameters can be passed using this option and in
9 particular PSS. Todo: ca support.
12 *) Add RSA PSS signing function. This will generate and set the
13 appropriate AlgorithmIdentifiers for PSS based on those in the
14 corresponding EVP_MD_CTX structure. No application support yet.
17 *) Support for companion algorithm specific ASN1 signing routines.
18 New function ASN1_item_sign_ctx() signs a pre-initialised
19 EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
20 the appropriate parameters.
23 *) Add new algorithm specific ASN1 verification initialisation function
24 to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
25 handling will be the same no matter what EVP_PKEY_METHOD is used.
26 Add a PSS handler to support verification of PSS signatures: checked
27 against a number of sample certificates.
30 *) Add signature printing for PSS. Add PSS OIDs.
31 [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
33 *) Add algorithm specific signature printing. An individual ASN1 method
34 can now print out signatures instead of the standard hex dump.
36 More complex signatures (e.g. PSS) can print out more meaningful
37 information. Include DSA version that prints out the signature
41 *) Add -trusted_first option which attempts to find certificates in the
42 trusted store even if an untrusted chain is also supplied.
45 *) Initial experimental support for explicitly trusted non-root CAs.
46 OpenSSL still tries to build a complete chain to a root but if an
47 intermediate CA has a trust setting included that is used. The first
48 setting is used: whether to trust or reject.
51 *) New -verify_name option in command line utilities to set verification
55 *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
56 Add CMAC pkey methods.
59 *) Experiemental regnegotiation in s_server -www mode. If the client
60 browses /reneg connection is renegotiated. If /renegcert it is
61 renegotiated requesting a certificate.
64 *) Add an "external" session cache for debugging purposes to s_server. This
65 should help trace issues which normally are only apparent in deployed
66 multi-process servers.
69 *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
70 a few changes are required:
72 Add SSL_OP_NO_TLSv1_1 flag.
74 Update version checking logic to handle version 1.1.
75 Add explicit IV handling (ported from DTLS code).
76 Add command line options to s_client/s_server.
79 *) Experiemental password based recipient info support for CMS library:
83 *) Split password based encryption into PBES2 and PBKDF2 functions. This
84 neatly separates the code into cipher and PBE sections and is required
85 for some algorithms that split PBES2 into separate pieces (such as
89 *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
90 return value is ignored. NB. The functions RAND_add(), RAND_seed(),
91 BIO_set_cipher() and some obscure PEM functions were changed so they
92 can now return an error. The RAND changes required a change to the
93 RAND_METHOD structure.
96 *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
97 a gcc attribute to warn if the result of a function is ignored. This
98 is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
99 whose return value is often ignored.
102 Changes between 0.9.8m and 1.0.0 [25 Feb 2010]
104 *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
105 context. The operation can be customised via the ctrl mechanism in
106 case ENGINEs want to include additional functionality.
109 *) Tolerate yet another broken PKCS#8 key format: private key value negative.
112 *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
113 output hashes compatible with older versions of OpenSSL.
114 [Willy Weisz <weisz@vcpc.univie.ac.at>]
116 *) Fix compression algorithm handling: if resuming a session use the
117 compression algorithm of the resumed session instead of determining
118 it from client hello again. Don't allow server to change algorithm.
121 *) Constify crypto/cast (i.e., <openssl/cast.h>): a CAST_KEY doesn't
122 change when encrypting or decrypting.
125 *) Add load_crls() function to apps tidying load_certs() too. Add option
126 to verify utility to allow additional CRLs to be included.
129 *) Update OCSP request code to permit adding custom headers to the request:
130 some responders need this.
133 *) The function EVP_PKEY_sign() returns <=0 on error: check return code
135 [Julia Lawall <julia@diku.dk>]
137 *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
138 needlessly dereferenced structures, used obsolete functions and
139 didn't handle all updated verify codes correctly.
142 *) Disable MD2 in the default configuration.
145 *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
146 indicate the initial BIO being pushed or popped. This makes it possible
147 to determine whether the BIO is the one explicitly called or as a result
148 of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
149 it handles reference counts correctly and doesn't zero out the I/O bio
150 when it is not being explicitly popped. WARNING: applications which
151 included workarounds for the old buggy behaviour will need to be modified
152 or they could free up already freed BIOs.
155 *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
156 renaming to all platforms (within the 0.9.8 branch, this was
157 done conditionally on Netware platforms to avoid a name clash).
158 [Guenter <lists@gknw.net>]
160 *) Add ECDHE and PSK support to DTLS.
161 [Michael Tuexen <tuexen@fh-muenster.de>]
163 *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
167 *) Add "missing" function EVP_MD_flags() (without this the only way to
168 retrieve a digest flags is by accessing the structure directly. Update
169 EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
170 or cipher is registered as in the "from" argument. Print out all
171 registered digests in the dgst usage message instead of manually
172 attempting to work them out.
175 *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
176 this allows the use of compression and extensions. Change default cipher
177 string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
178 by default unless an application cipher string requests it.
181 *) Alter match criteria in PKCS12_parse(). It used to try to use local
182 key ids to find matching certificates and keys but some PKCS#12 files
183 don't follow the (somewhat unwritten) rules and this strategy fails.
184 Now just gather all certificates together and the first private key
185 then look for the first certificate that matches the key.
188 *) Support use of registered digest and cipher names for dgst and cipher
189 commands instead of having to add each one as a special case. So now
196 openssl dgst -sha256 foo
198 and this works for ENGINE based algorithms too.
202 *) Update Gost ENGINE to support parameter files.
203 [Victor B. Wagner <vitus@cryptocom.ru>]
205 *) Support GeneralizedTime in ca utility.
206 [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
208 *) Enhance the hash format used for certificate directory links. The new
209 form uses the canonical encoding (meaning equivalent names will work
210 even if they aren't identical) and uses SHA1 instead of MD5. This form
211 is incompatible with the older format and as a result c_rehash should
212 be used to rebuild symbolic links.
215 *) Make PKCS#8 the default write format for private keys, replacing the
216 traditional format. This form is standardised, more secure and doesn't
217 include an implicit MD5 dependency.
220 *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
221 committed to OpenSSL should pass this lot as a minimum.
224 *) Add session ticket override functionality for use by EAP-FAST.
225 [Jouni Malinen <j@w1.fi>]
227 *) Modify HMAC functions to return a value. Since these can be implemented
228 in an ENGINE errors can occur.
231 *) Type-checked OBJ_bsearch_ex.
234 *) Type-checked OBJ_bsearch. Also some constification necessitated
235 by type-checking. Still to come: TXT_DB, bsearch(?),
236 OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
240 *) New function OPENSSL_gmtime_adj() to add a specific number of days and
241 seconds to a tm structure directly, instead of going through OS
242 specific date routines. This avoids any issues with OS routines such
243 as the year 2038 bug. New *_adj() functions for ASN1 time structures
244 and X509_time_adj_ex() to cover the extended range. The existing
245 X509_time_adj() is still usable and will no longer have any date issues.
248 *) Delta CRL support. New use deltas option which will attempt to locate
249 and search any appropriate delta CRLs available.
251 This work was sponsored by Google.
254 *) Support for CRLs partitioned by reason code. Reorganise CRL processing
255 code and add additional score elements. Validate alternate CRL paths
256 as part of the CRL checking and indicate a new error "CRL path validation
257 error" in this case. Applications wanting additional details can use
258 the verify callback and check the new "parent" field. If this is not
259 NULL CRL path validation is taking place. Existing applications wont
260 see this because it requires extended CRL support which is off by
263 This work was sponsored by Google.
266 *) Support for freshest CRL extension.
268 This work was sponsored by Google.
271 *) Initial indirect CRL support. Currently only supported in the CRLs
272 passed directly and not via lookup. Process certificate issuer
273 CRL entry extension and lookup CRL entries by bother issuer name
274 and serial number. Check and process CRL issuer entry in IDP extension.
276 This work was sponsored by Google.
279 *) Add support for distinct certificate and CRL paths. The CRL issuer
280 certificate is validated separately in this case. Only enabled if
281 an extended CRL support flag is set: this flag will enable additional
282 CRL functionality in future.
284 This work was sponsored by Google.
287 *) Add support for policy mappings extension.
289 This work was sponsored by Google.
292 *) Fixes to pathlength constraint, self issued certificate handling,
293 policy processing to align with RFC3280 and PKITS tests.
295 This work was sponsored by Google.
298 *) Support for name constraints certificate extension. DN, email, DNS
299 and URI types are currently supported.
301 This work was sponsored by Google.
304 *) To cater for systems that provide a pointer-based thread ID rather
305 than numeric, deprecate the current numeric thread ID mechanism and
306 replace it with a structure and associated callback type. This
307 mechanism allows a numeric "hash" to be extracted from a thread ID in
308 either case, and on platforms where pointers are larger than 'long',
309 mixing is done to help ensure the numeric 'hash' is usable even if it
310 can't be guaranteed unique. The default mechanism is to use "&errno"
311 as a pointer-based thread ID to distinguish between threads.
313 Applications that want to provide their own thread IDs should now use
314 CRYPTO_THREADID_set_callback() to register a callback that will call
315 either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
317 Note that ERR_remove_state() is now deprecated, because it is tied
318 to the assumption that thread IDs are numeric. ERR_remove_state(0)
319 to free the current thread's error state should be replaced by
320 ERR_remove_thread_state(NULL).
322 (This new approach replaces the functions CRYPTO_set_idptr_callback(),
323 CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
324 OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
325 application was previously providing a numeric thread callback that
326 was inappropriate for distinguishing threads, then uniqueness might
327 have been obtained with &errno that happened immediately in the
328 intermediate development versions of OpenSSL; this is no longer the
329 case, the numeric thread callback will now override the automatic use
331 [Geoff Thorpe, with help from Bodo Moeller]
333 *) Initial support for different CRL issuing certificates. This covers a
334 simple case where the self issued certificates in the chain exist and
335 the real CRL issuer is higher in the existing chain.
337 This work was sponsored by Google.
340 *) Removed effectively defunct crypto/store from the build.
343 *) Revamp of STACK to provide stronger type-checking. Still to come:
344 TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
345 ASN1_STRING, CONF_VALUE.
348 *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
349 RAM on SSL connections. This option can save about 34k per idle SSL.
352 *) Revamp of LHASH to provide stronger type-checking. Still to come:
353 STACK, TXT_DB, bsearch, qsort.
356 *) Initial support for Cryptographic Message Syntax (aka CMS) based
357 on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
358 support for data, signedData, compressedData, digestedData and
359 encryptedData, envelopedData types included. Scripts to check against
360 RFC4134 examples draft and interop and consistency checks of many
361 content types and variants.
364 *) Add options to enc utility to support use of zlib compression BIO.
367 *) Extend mk1mf to support importing of options and assembly language
368 files from Configure script, currently only included in VC-WIN32.
369 The assembly language rules can now optionally generate the source
370 files from the associated perl scripts.
373 *) Implement remaining functionality needed to support GOST ciphersuites.
374 Interop testing has been performed using CryptoPro implementations.
375 [Victor B. Wagner <vitus@cryptocom.ru>]
377 *) s390x assembler pack.
380 *) ARMv4 assembler pack. ARMv4 refers to v4 and later ISA, not CPU
384 *) Implement Opaque PRF Input TLS extension as specified in
385 draft-rescorla-tls-opaque-prf-input-00.txt. Since this is not an
386 official specification yet and no extension type assignment by
387 IANA exists, this extension (for now) will have to be explicitly
388 enabled when building OpenSSL by providing the extension number
389 to use. For example, specify an option
391 -DTLSEXT_TYPE_opaque_prf_input=0x9527
393 to the "config" or "Configure" script to enable the extension,
394 assuming extension number 0x9527 (which is a completely arbitrary
395 and unofficial assignment based on the MD5 hash of the Internet
396 Draft). Note that by doing so, you potentially lose
397 interoperability with other TLS implementations since these might
398 be using the same extension number for other purposes.
400 SSL_set_tlsext_opaque_prf_input(ssl, src, len) is used to set the
401 opaque PRF input value to use in the handshake. This will create
402 an interal copy of the length-'len' string at 'src', and will
403 return non-zero for success.
405 To get more control and flexibility, provide a callback function
408 SSL_CTX_set_tlsext_opaque_prf_input_callback(ctx, cb)
409 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg(ctx, arg)
413 int (*cb)(SSL *, void *peerinput, size_t len, void *arg);
416 Callback function 'cb' will be called in handshakes, and is
417 expected to use SSL_set_tlsext_opaque_prf_input() as appropriate.
418 Argument 'arg' is for application purposes (the value as given to
419 SSL_CTX_set_tlsext_opaque_prf_input_callback_arg() will directly
420 be provided to the callback function). The callback function
421 has to return non-zero to report success: usually 1 to use opaque
422 PRF input just if possible, or 2 to enforce use of the opaque PRF
423 input. In the latter case, the library will abort the handshake
424 if opaque PRF input is not successfully negotiated.
426 Arguments 'peerinput' and 'len' given to the callback function
427 will always be NULL and 0 in the case of a client. A server will
428 see the client's opaque PRF input through these variables if
429 available (NULL and 0 otherwise). Note that if the server
430 provides an opaque PRF input, the length must be the same as the
431 length of the client's opaque PRF input.
433 Note that the callback function will only be called when creating
434 a new session (session resumption can resume whatever was
435 previously negotiated), and will not be called in SSL 2.0
436 handshakes; thus, SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) or
437 SSL_set_options(ssl, SSL_OP_NO_SSLv2) is especially recommended
438 for applications that need to enforce opaque PRF input.
442 *) Update ssl code to support digests other than SHA1+MD5 for handshake
445 [Victor B. Wagner <vitus@cryptocom.ru>]
447 *) Add RFC4507 support to OpenSSL. This includes the corrections in
448 RFC4507bis. The encrypted ticket format is an encrypted encoded
449 SSL_SESSION structure, that way new session features are automatically
452 If a client application caches session in an SSL_SESSION structure
453 support is transparent because tickets are now stored in the encoded
456 The SSL_CTX structure automatically generates keys for ticket
457 protection in servers so again support should be possible
458 with no application modification.
460 If a client or server wishes to disable RFC4507 support then the option
461 SSL_OP_NO_TICKET can be set.
463 Add a TLS extension debugging callback to allow the contents of any client
464 or server extensions to be examined.
466 This work was sponsored by Google.
469 *) Final changes to avoid use of pointer pointer casts in OpenSSL.
470 OpenSSL should now compile cleanly on gcc 4.2
471 [Peter Hartley <pdh@utter.chaos.org.uk>, Steve Henson]
473 *) Update SSL library to use new EVP_PKEY MAC API. Include generic MAC
474 support including streaming MAC support: this is required for GOST
476 [Victor B. Wagner <vitus@cryptocom.ru>, Steve Henson]
478 *) Add option -stream to use PKCS#7 streaming in smime utility. New
479 function i2d_PKCS7_bio_stream() and PEM_write_PKCS7_bio_stream()
480 to output in BER and PEM format.
483 *) Experimental support for use of HMAC via EVP_PKEY interface. This
484 allows HMAC to be handled via the EVP_DigestSign*() interface. The
485 EVP_PKEY "key" in this case is the HMAC key, potentially allowing
486 ENGINE support for HMAC keys which are unextractable. New -mac and
487 -macopt options to dgst utility.
490 *) New option -sigopt to dgst utility. Update dgst to use
491 EVP_Digest{Sign,Verify}*. These two changes make it possible to use
492 alternative signing paramaters such as X9.31 or PSS in the dgst
496 *) Change ssl_cipher_apply_rule(), the internal function that does
497 the work each time a ciphersuite string requests enabling
498 ("foo+bar"), moving ("+foo+bar"), disabling ("-foo+bar", or
499 removing ("!foo+bar") a class of ciphersuites: Now it maintains
500 the order of disabled ciphersuites such that those ciphersuites
501 that most recently went from enabled to disabled not only stay
502 in order with respect to each other, but also have higher priority
503 than other disabled ciphersuites the next time ciphersuites are
506 This means that you can now say, e.g., "PSK:-PSK:HIGH" to enable
507 the same ciphersuites as with "HIGH" alone, but in a specific
508 order where the PSK ciphersuites come first (since they are the
509 most recently disabled ciphersuites when "HIGH" is parsed).
511 Also, change ssl_create_cipher_list() (using this new
512 funcionality) such that between otherwise identical
513 cihpersuites, ephemeral ECDH is preferred over ephemeral DH in
517 *) Change ssl_create_cipher_list() so that it automatically
518 arranges the ciphersuites in reasonable order before starting
519 to process the rule string. Thus, the definition for "DEFAULT"
520 (SSL_DEFAULT_CIPHER_LIST) now is just "ALL:!aNULL:!eNULL", but
521 remains equivalent to "AES:ALL:!aNULL:!eNULL:+aECDH:+kRSA:+RC4:@STRENGTH".
522 This makes it much easier to arrive at a reasonable default order
523 in applications for which anonymous ciphers are OK (meaning
524 that you can't actually use DEFAULT).
525 [Bodo Moeller; suggested by Victor Duchovni]
527 *) Split the SSL/TLS algorithm mask (as used for ciphersuite string
528 processing) into multiple integers instead of setting
529 "SSL_MKEY_MASK" bits, "SSL_AUTH_MASK" bits, "SSL_ENC_MASK",
530 "SSL_MAC_MASK", and "SSL_SSL_MASK" bits all in a single integer.
531 (These masks as well as the individual bit definitions are hidden
532 away into the non-exported interface ssl/ssl_locl.h, so this
533 change to the definition of the SSL_CIPHER structure shouldn't
534 affect applications.) This give us more bits for each of these
535 categories, so there is no longer a need to coagulate AES128 and
536 AES256 into a single algorithm bit, and to coagulate Camellia128
537 and Camellia256 into a single algorithm bit, which has led to all
540 Thus, among other things, the kludge introduced in 0.9.7m and
541 0.9.8e for masking out AES256 independently of AES128 or masking
542 out Camellia256 independently of AES256 is not needed here in 0.9.9.
544 With the change, we also introduce new ciphersuite aliases that
545 so far were missing: "AES128", "AES256", "CAMELLIA128", and
549 *) Add support for dsa-with-SHA224 and dsa-with-SHA256.
550 Use the leftmost N bytes of the signature input if the input is
551 larger than the prime q (with N being the size in bytes of q).
554 *) Very *very* experimental PKCS#7 streaming encoder support. Nothing uses
555 it yet and it is largely untested.
558 *) Add support for the ecdsa-with-SHA224/256/384/512 signature types.
561 *) Initial incomplete changes to avoid need for function casts in OpenSSL
562 some compilers (gcc 4.2 and later) reject their use. Safestack is
563 reimplemented. Update ASN1 to avoid use of legacy functions.
566 *) Win32/64 targets are linked with Winsock2.
569 *) Add an X509_CRL_METHOD structure to allow CRL processing to be redirected
570 to external functions. This can be used to increase CRL handling
571 efficiency especially when CRLs are very large by (for example) storing
572 the CRL revoked certificates in a database.
575 *) Overhaul of by_dir code. Add support for dynamic loading of CRLs so
576 new CRLs added to a directory can be used. New command line option
577 -verify_return_error to s_client and s_server. This causes real errors
578 to be returned by the verify callback instead of carrying on no matter
579 what. This reflects the way a "real world" verify callback would behave.
582 *) GOST engine, supporting several GOST algorithms and public key formats.
583 Kindly donated by Cryptocom.
586 *) Partial support for Issuing Distribution Point CRL extension. CRLs
587 partitioned by DP are handled but no indirect CRL or reason partitioning
588 (yet). Complete overhaul of CRL handling: now the most suitable CRL is
589 selected via a scoring technique which handles IDP and AKID in CRLs.
592 *) New X509_STORE_CTX callbacks lookup_crls() and lookup_certs() which
593 will ultimately be used for all verify operations: this will remove the
594 X509_STORE dependency on certificate verification and allow alternative
595 lookup methods. X509_STORE based implementations of these two callbacks.
598 *) Allow multiple CRLs to exist in an X509_STORE with matching issuer names.
599 Modify get_crl() to find a valid (unexpired) CRL if possible.
602 *) New function X509_CRL_match() to check if two CRLs are identical. Normally
603 this would be called X509_CRL_cmp() but that name is already used by
604 a function that just compares CRL issuer names. Cache several CRL
605 extensions in X509_CRL structure and cache CRLDP in X509.
608 *) Store a "canonical" representation of X509_NAME structure (ASN1 Name)
609 this maps equivalent X509_NAME structures into a consistent structure.
610 Name comparison can then be performed rapidly using memcmp().
613 *) Non-blocking OCSP request processing. Add -timeout option to ocsp
617 *) Allow digests to supply their own micalg string for S/MIME type using
618 the ctrl EVP_MD_CTRL_MICALG.
621 *) During PKCS7 signing pass the PKCS7 SignerInfo structure to the
622 EVP_PKEY_METHOD before and after signing via the EVP_PKEY_CTRL_PKCS7_SIGN
623 ctrl. It can then customise the structure before and/or after signing
627 *) New function OBJ_add_sigid() to allow application defined signature OIDs
628 to be added to OpenSSLs internal tables. New function OBJ_sigid_free()
629 to free up any added signature OIDs.
632 *) New functions EVP_CIPHER_do_all(), EVP_CIPHER_do_all_sorted(),
633 EVP_MD_do_all() and EVP_MD_do_all_sorted() to enumerate internal
634 digest and cipher tables. New options added to openssl utility:
635 list-message-digest-algorithms and list-cipher-algorithms.
638 *) Change the array representation of binary polynomials: the list
639 of degrees of non-zero coefficients is now terminated with -1.
640 Previously it was terminated with 0, which was also part of the
641 value; thus, the array representation was not applicable to
642 polynomials where t^0 has coefficient zero. This change makes
643 the array representation useful in a more general context.
646 *) Various modifications and fixes to SSL/TLS cipher string
647 handling. For ECC, the code now distinguishes between fixed ECDH
648 with RSA certificates on the one hand and with ECDSA certificates
649 on the other hand, since these are separate ciphersuites. The
650 unused code for Fortezza ciphersuites has been removed.
652 For consistency with EDH, ephemeral ECDH is now called "EECDH"
653 (not "ECDHE"). For consistency with the code for DH
654 certificates, use of ECDH certificates is now considered ECDH
655 authentication, not RSA or ECDSA authentication (the latter is
656 merely the CA's signing algorithm and not actively used in the
659 The temporary ciphersuite alias "ECCdraft" is no longer
660 available, and ECC ciphersuites are no longer excluded from "ALL"
661 and "DEFAULT". The following aliases now exist for RFC 4492
662 ciphersuites, most of these by analogy with the DH case:
664 kECDHr - ECDH cert, signed with RSA
665 kECDHe - ECDH cert, signed with ECDSA
666 kECDH - ECDH cert (signed with either RSA or ECDSA)
667 kEECDH - ephemeral ECDH
668 ECDH - ECDH cert or ephemeral ECDH
674 AECDH - anonymous ECDH
675 EECDH - non-anonymous ephemeral ECDH (equivalent to "kEECDH:-AECDH")
679 *) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
680 Use correct micalg parameters depending on digest(s) in signed message.
683 *) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
684 an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
687 *) Initial engine support for EVP_PKEY_METHOD. New functions to permit
688 an engine to register a method. Add ENGINE lookups for methods and
689 functional reference processing.
692 *) New functions EVP_Digest{Sign,Verify)*. These are enchance versions of
693 EVP_{Sign,Verify}* which allow an application to customise the signature
697 *) New -resign option to smime utility. This adds one or more signers
698 to an existing PKCS#7 signedData structure. Also -md option to use an
699 alternative message digest algorithm for signing.
702 *) Tidy up PKCS#7 routines and add new functions to make it easier to
703 create PKCS7 structures containing multiple signers. Update smime
704 application to support multiple signers.
707 *) New -macalg option to pkcs12 utility to allow setting of an alternative
711 *) Initial support for PKCS#5 v2.0 PRFs other than default SHA1 HMAC.
712 Reorganize PBE internals to lookup from a static table using NIDs,
713 add support for HMAC PBE OID translation. Add a EVP_CIPHER ctrl:
714 EVP_CTRL_PBE_PRF_NID this allows a cipher to specify an alternative
715 PRF which will be automatically used with PBES2.
718 *) Replace the algorithm specific calls to generate keys in "req" with the
722 *) Update PKCS#7 enveloped data routines to use new API. This is now
723 supported by any public key method supporting the encrypt operation. A
724 ctrl is added to allow the public key algorithm to examine or modify
725 the PKCS#7 RecipientInfo structure if it needs to: for RSA this is
729 *) Add a ctrl to asn1 method to allow a public key algorithm to express
730 a default digest type to use. In most cases this will be SHA1 but some
731 algorithms (such as GOST) need to specify an alternative digest. The
732 return value indicates how strong the prefernce is 1 means optional and
733 2 is mandatory (that is it is the only supported type). Modify
734 ASN1_item_sign() to accept a NULL digest argument to indicate it should
735 use the default md. Update openssl utilities to use the default digest
736 type for signing if it is not explicitly indicated.
739 *) Use OID cross reference table in ASN1_sign() and ASN1_verify(). New
740 EVP_MD flag EVP_MD_FLAG_PKEY_METHOD_SIGNATURE. This uses the relevant
741 signing method from the key type. This effectively removes the link
742 between digests and public key types.
745 *) Add an OID cross reference table and utility functions. Its purpose is to
746 translate between signature OIDs such as SHA1WithrsaEncryption and SHA1,
747 rsaEncryption. This will allow some of the algorithm specific hackery
748 needed to use the correct OID to be removed.
751 *) Remove algorithm specific dependencies when setting PKCS7_SIGNER_INFO
752 structures for PKCS7_sign(). They are now set up by the relevant public
756 *) Add provisional EC pkey method with support for ECDSA and ECDH.
759 *) Add support for key derivation (agreement) in the API, DH method and
763 *) Add DSA pkey method and DH pkey methods, extend DH ASN1 method to support
764 public and private key formats. As a side effect these add additional
765 command line functionality not previously available: DSA signatures can be
766 generated and verified using pkeyutl and DH key support and generation in
771 [Oliver Tappe <zooey@hirschkaefer.de>]
773 *) New make target "install_html_docs" installs HTML renditions of the
775 [Oliver Tappe <zooey@hirschkaefer.de>]
777 *) New utility "genpkey" this is analagous to "genrsa" etc except it can
778 generate keys for any algorithm. Extend and update EVP_PKEY_METHOD to
779 support key and parameter generation and add initial key generation
780 functionality for RSA.
783 *) Add functions for main EVP_PKEY_method operations. The undocumented
784 functions EVP_PKEY_{encrypt,decrypt} have been renamed to
785 EVP_PKEY_{encrypt,decrypt}_old.
788 *) Initial definitions for EVP_PKEY_METHOD. This will be a high level public
789 key API, doesn't do much yet.
792 *) New function EVP_PKEY_asn1_get0_info() to retrieve information about
793 public key algorithms. New option to openssl utility:
794 "list-public-key-algorithms" to print out info.
797 *) Implement the Supported Elliptic Curves Extension for
798 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
801 *) Don't free up OIDs in OBJ_cleanup() if they are in use by EVP_MD or
802 EVP_CIPHER structures to avoid later problems in EVP_cleanup().
805 *) New utilities pkey and pkeyparam. These are similar to algorithm specific
806 utilities such as rsa, dsa, dsaparam etc except they process any key
810 *) Transfer public key printing routines to EVP_PKEY_ASN1_METHOD. New
811 functions EVP_PKEY_print_public(), EVP_PKEY_print_private(),
812 EVP_PKEY_print_param() to print public key data from an EVP_PKEY
816 *) Initial support for pluggable public key ASN1.
817 De-spaghettify the public key ASN1 handling. Move public and private
818 key ASN1 handling to a new EVP_PKEY_ASN1_METHOD structure. Relocate
819 algorithm specific handling to a single module within the relevant
820 algorithm directory. Add functions to allow (near) opaque processing
821 of public and private key structures.
824 *) Implement the Supported Point Formats Extension for
825 ECC ciphersuites from draft-ietf-tls-ecc-12.txt.
828 *) Add initial support for RFC 4279 PSK TLS ciphersuites. Add members
829 for the psk identity [hint] and the psk callback functions to the
830 SSL_SESSION, SSL and SSL_CTX structure.
833 PSK-RC4-SHA, PSK-3DES-EDE-CBC-SHA, PSK-AES128-CBC-SHA,
837 SSL_CTX_use_psk_identity_hint
838 SSL_get_psk_identity_hint
840 SSL_use_psk_identity_hint
842 [Mika Kousa and Pasi Eronen of Nokia Corporation]
844 *) Add RFC 3161 compliant time stamp request creation, response generation
845 and response verification functionality.
846 [Zoltán Glózik <zglozik@opentsa.org>, The OpenTSA Project]
848 *) Add initial support for TLS extensions, specifically for the server_name
849 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
850 have new members for a host name. The SSL data structure has an
851 additional member SSL_CTX *initial_ctx so that new sessions can be
852 stored in that context to allow for session resumption, even after the
853 SSL has been switched to a new SSL_CTX in reaction to a client's
854 server_name extension.
856 New functions (subject to change):
859 SSL_get_servername_type()
862 New CTRL codes and macros (subject to change):
864 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
865 - SSL_CTX_set_tlsext_servername_callback()
866 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
867 - SSL_CTX_set_tlsext_servername_arg()
868 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
870 openssl s_client has a new '-servername ...' option.
872 openssl s_server has new options '-servername_host ...', '-cert2 ...',
873 '-key2 ...', '-servername_fatal' (subject to change). This allows
874 testing the HostName extension for a specific single host name ('-cert'
875 and '-key' remain fallbacks for handshakes without HostName
876 negotiation). If the unrecogninzed_name alert has to be sent, this by
877 default is a warning; it becomes fatal with the '-servername_fatal'
880 [Peter Sylvester, Remy Allais, Christophe Renou]
882 *) Whirlpool hash implementation is added.
885 *) BIGNUM code on 64-bit SPARCv9 targets is switched from bn(64,64) to
886 bn(64,32). Because of instruction set limitations it doesn't have
887 any negative impact on performance. This was done mostly in order
888 to make it possible to share assembler modules, such as bn_mul_mont
889 implementations, between 32- and 64-bit builds without hassle.
892 *) Move code previously exiled into file crypto/ec/ec2_smpt.c
893 to ec2_smpl.c, and no longer require the OPENSSL_EC_BIN_PT_COMP
897 *) New candidate for BIGNUM assembler implementation, bn_mul_mont,
898 dedicated Montgomery multiplication procedure, is introduced.
899 BN_MONT_CTX is modified to allow bn_mul_mont to reach for higher
900 "64-bit" performance on certain 32-bit targets.
903 *) New option SSL_OP_NO_COMP to disable use of compression selectively
904 in SSL structures. New SSL ctrl to set maximum send fragment size.
905 Save memory by seeting the I/O buffer sizes dynamically instead of
906 using the maximum available value.
909 *) New option -V for 'openssl ciphers'. This prints the ciphersuite code
910 in addition to the text details.
913 *) Very, very preliminary EXPERIMENTAL support for printing of general
914 ASN1 structures. This currently produces rather ugly output and doesn't
915 handle several customised structures at all.
918 *) Integrated support for PVK file format and some related formats such
919 as MS PUBLICKEYBLOB and PRIVATEKEYBLOB. Command line switches to support
920 these in the 'rsa' and 'dsa' utilities.
923 *) Support for PKCS#1 RSAPublicKey format on rsa utility command line.
926 *) Remove the ancient ASN1_METHOD code. This was only ever used in one
927 place for the (very old) "NETSCAPE" format certificates which are now
928 handled using new ASN1 code equivalents.
931 *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
932 pointer and make the SSL_METHOD parameter in SSL_CTX_new,
933 SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
936 *) Modify CRL distribution points extension code to print out previously
937 unsupported fields. Enhance extension setting code to allow setting of
941 *) Add print and set support for Issuing Distribution Point CRL extension.
944 *) Change 'Configure' script to enable Camellia by default.
947 Changes between 0.9.8m and 0.9.8n [xx XXX xxxx]
949 *) Fix for CVE-2010-0433 where some kerberos enabled versions of OpenSSL
950 could be crashed if the relevant tables were not present (e.g. chrooted).
951 [Tomas Hoger <thoger@redhat.com>]
953 Changes between 0.9.8l and 0.9.8m [25 Feb 2010]
955 *) Always check bn_wexpend() return values for failure. (CVE-2009-3245)
956 [Martin Olsson, Neel Mehta]
958 *) Fix X509_STORE locking: Every 'objs' access requires a lock (to
959 accommodate for stack sorting, always a write lock!).
962 *) On some versions of WIN32 Heap32Next is very slow. This can cause
963 excessive delays in the RAND_poll(): over a minute. As a workaround
964 include a time check in the inner Heap32Next loop too.
967 *) The code that handled flushing of data in SSL/TLS originally used the
968 BIO_CTRL_INFO ctrl to see if any data was pending first. This caused
969 the problem outlined in PR#1949. The fix suggested there however can
970 trigger problems with buggy BIO_CTRL_WPENDING (e.g. some versions
971 of Apache). So instead simplify the code to flush unconditionally.
972 This should be fine since flushing with no data to flush is a no op.
975 *) Handle TLS versions 2.0 and later properly and correctly use the
976 highest version of TLS/SSL supported. Although TLS >= 2.0 is some way
977 off ancient servers have a habit of sticking around for a while...
980 *) Modify compression code so it frees up structures without using the
981 ex_data callbacks. This works around a problem where some applications
982 call CRYPTO_cleanup_all_ex_data() before application exit (e.g. when
983 restarting) then use compression (e.g. SSL with compression) later.
984 This results in significant per-connection memory leaks and
985 has caused some security issues including CVE-2008-1678 and
989 *) Add option SSL_OP_LEGACY_SERVER_CONNECT which will allow clients to
990 connect and renegotiate with servers which do not support RI.
991 Until RI is more widely deployed this option is enabled by default.
994 *) Add "missing" ssl ctrls to clear options and mode.
997 *) If client attempts to renegotiate and doesn't support RI respond with
998 a no_renegotiation alert as required by RFC5746. Some renegotiating
999 TLS clients will continue a connection gracefully when they receive
1000 the alert. Unfortunately OpenSSL mishandled this alert and would hang
1001 waiting for a server hello which it will never receive. Now we treat a
1002 received no_renegotiation alert as a fatal error. This is because
1003 applications requesting a renegotiation might well expect it to succeed
1004 and would have no code in place to handle the server denying it so the
1005 only safe thing to do is to terminate the connection.
1008 *) Add ctrl macro SSL_get_secure_renegotiation_support() which returns 1 if
1009 peer supports secure renegotiation and 0 otherwise. Print out peer
1010 renegotiation support in s_client/s_server.
1013 *) Replace the highly broken and deprecated SPKAC certification method with
1014 the updated NID creation version. This should correctly handle UTF8.
1017 *) Implement RFC5746. Re-enable renegotiation but require the extension
1018 as needed. Unfortunately, SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
1019 turns out to be a bad idea. It has been replaced by
1020 SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION which can be set with
1021 SSL_CTX_set_options(). This is really not recommended unless you
1022 know what you are doing.
1023 [Eric Rescorla <ekr@networkresonance.com>, Ben Laurie, Steve Henson]
1025 *) Fixes to stateless session resumption handling. Use initial_ctx when
1026 issuing and attempting to decrypt tickets in case it has changed during
1027 servername handling. Use a non-zero length session ID when attempting
1028 stateless session resumption: this makes it possible to determine if
1029 a resumption has occurred immediately after receiving server hello
1030 (several places in OpenSSL subtly assume this) instead of later in
1034 *) The functions ENGINE_ctrl(), OPENSSL_isservice(),
1035 CMS_get1_RecipientRequest() and RAND_bytes() can return <=0 on error
1036 fixes for a few places where the return code is not checked
1038 [Julia Lawall <julia@diku.dk>]
1040 *) Add --strict-warnings option to Configure script to include devteam
1041 warnings in other configurations.
1044 *) Add support for --libdir option and LIBDIR variable in makefiles. This
1045 makes it possible to install openssl libraries in locations which
1046 have names other than "lib", for example "/usr/lib64" which some
1048 [Steve Henson, based on patch from Jeremy Utley]
1050 *) Don't allow the use of leading 0x80 in OIDs. This is a violation of
1051 X690 8.9.12 and can produce some misleading textual output of OIDs.
1052 [Steve Henson, reported by Dan Kaminsky]
1054 *) Delete MD2 from algorithm tables. This follows the recommendation in
1055 several standards that it is not used in new applications due to
1056 several cryptographic weaknesses. For binary compatibility reasons
1057 the MD2 API is still compiled in by default.
1060 *) Add compression id to {d2i,i2d}_SSL_SESSION so it is correctly saved
1064 *) Rename uni2asc and asc2uni functions to OPENSSL_uni2asc and
1065 OPENSSL_asc2uni conditionally on Netware platforms to avoid a name
1067 [Guenter <lists@gknw.net>]
1069 *) Fix the server certificate chain building code to use X509_verify_cert(),
1070 it used to have an ad-hoc builder which was unable to cope with anything
1071 other than a simple chain.
1072 [David Woodhouse <dwmw2@infradead.org>, Steve Henson]
1074 *) Don't check self signed certificate signatures in X509_verify_cert()
1075 by default (a flag can override this): it just wastes time without
1076 adding any security. As a useful side effect self signed root CAs
1077 with non-FIPS digests are now usable in FIPS mode.
1080 *) In dtls1_process_out_of_seq_message() the check if the current message
1081 is already buffered was missing. For every new message was memory
1082 allocated, allowing an attacker to perform an denial of service attack
1083 with sending out of seq handshake messages until there is no memory
1084 left. Additionally every future messege was buffered, even if the
1085 sequence number made no sense and would be part of another handshake.
1086 So only messages with sequence numbers less than 10 in advance will be
1087 buffered. (CVE-2009-1378)
1088 [Robin Seggelmann, discovered by Daniel Mentz]
1090 *) Records are buffered if they arrive with a future epoch to be
1091 processed after finishing the corresponding handshake. There is
1092 currently no limitation to this buffer allowing an attacker to perform
1093 a DOS attack with sending records with future epochs until there is no
1094 memory left. This patch adds the pqueue_size() function to detemine
1095 the size of a buffer and limits the record buffer to 100 entries.
1097 [Robin Seggelmann, discovered by Daniel Mentz]
1099 *) Keep a copy of frag->msg_header.frag_len so it can be used after the
1100 parent structure is freed. (CVE-2009-1379)
1103 *) Handle non-blocking I/O properly in SSL_shutdown() call.
1104 [Darryl Miles <darryl-mailinglists@netbauds.net>]
1107 [Ilya O. <vrghost@gmail.com>]
1109 Changes between 0.9.8k and 0.9.8l [5 Nov 2009]
1111 *) Disable renegotiation completely - this fixes a severe security
1112 problem (CVE-2009-3555) at the cost of breaking all
1113 renegotiation. Renegotiation can be re-enabled by setting
1114 SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION in s3->flags at
1115 run-time. This is really not recommended unless you know what
1119 Changes between 0.9.8j and 0.9.8k [25 Mar 2009]
1121 *) Don't set val to NULL when freeing up structures, it is freed up by
1122 underlying code. If sizeof(void *) > sizeof(long) this can result in
1123 zeroing past the valid field. (CVE-2009-0789)
1124 [Paolo Ganci <Paolo.Ganci@AdNovum.CH>]
1126 *) Fix bug where return value of CMS_SignerInfo_verify_content() was not
1127 checked correctly. This would allow some invalid signed attributes to
1128 appear to verify correctly. (CVE-2009-0591)
1129 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1131 *) Reject UniversalString and BMPString types with invalid lengths. This
1132 prevents a crash in ASN1_STRING_print_ex() which assumes the strings have
1133 a legal length. (CVE-2009-0590)
1136 *) Set S/MIME signing as the default purpose rather than setting it
1137 unconditionally. This allows applications to override it at the store
1141 *) Permit restricted recursion of ASN1 strings. This is needed in practice
1142 to handle some structures.
1145 *) Improve efficiency of mem_gets: don't search whole buffer each time
1147 [Jeremy Shapiro <jnshapir@us.ibm.com>]
1149 *) New -hex option for openssl rand.
1152 *) Print out UTF8String and NumericString when parsing ASN1.
1155 *) Support NumericString type for name components.
1158 *) Allow CC in the environment to override the automatically chosen
1159 compiler. Note that nothing is done to ensure flags work with the
1163 Changes between 0.9.8i and 0.9.8j [07 Jan 2009]
1165 *) Properly check EVP_VerifyFinal() and similar return values
1167 [Ben Laurie, Bodo Moeller, Google Security Team]
1169 *) Enable TLS extensions by default.
1172 *) Allow the CHIL engine to be loaded, whether the application is
1173 multithreaded or not. (This does not release the developer from the
1174 obligation to set up the dynamic locking callbacks.)
1175 [Sander Temme <sander@temme.net>]
1177 *) Use correct exit code if there is an error in dgst command.
1178 [Steve Henson; problem pointed out by Roland Dirlewanger]
1180 *) Tweak Configure so that you need to say "experimental-jpake" to enable
1181 JPAKE, and need to use -DOPENSSL_EXPERIMENTAL_JPAKE in applications.
1184 *) Add experimental JPAKE support, including demo authentication in
1185 s_client and s_server.
1188 *) Set the comparison function in v3_addr_canonize().
1189 [Rob Austein <sra@hactrn.net>]
1191 *) Add support for XMPP STARTTLS in s_client.
1192 [Philip Paeps <philip@freebsd.org>]
1194 *) Change the server-side SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG behavior
1195 to ensure that even with this option, only ciphersuites in the
1196 server's preference list will be accepted. (Note that the option
1197 applies only when resuming a session, so the earlier behavior was
1198 just about the algorithm choice for symmetric cryptography.)
1201 Changes between 0.9.8h and 0.9.8i [15 Sep 2008]
1203 *) Fix NULL pointer dereference if a DTLS server received
1204 ChangeCipherSpec as first record (CVE-2009-1386).
1207 *) Fix a state transitition in s3_srvr.c and d1_srvr.c
1208 (was using SSL3_ST_CW_CLNT_HELLO_B, should be ..._ST_SW_SRVR_...).
1211 *) The fix in 0.9.8c that supposedly got rid of unsafe
1212 double-checked locking was incomplete for RSA blinding,
1213 addressing just one layer of what turns out to have been
1214 doubly unsafe triple-checked locking.
1216 So now fix this for real by retiring the MONT_HELPER macro
1217 in crypto/rsa/rsa_eay.c.
1219 [Bodo Moeller; problem pointed out by Marius Schilder]
1221 *) Various precautionary measures:
1223 - Avoid size_t integer overflow in HASH_UPDATE (md32_common.h).
1225 - Avoid a buffer overflow in d2i_SSL_SESSION() (ssl_asn1.c).
1226 (NB: This would require knowledge of the secret session ticket key
1227 to exploit, in which case you'd be SOL either way.)
1229 - Change bn_nist.c so that it will properly handle input BIGNUMs
1230 outside the expected range.
1232 - Enforce the 'num' check in BN_div() (bn_div.c) for non-BN_DEBUG
1235 [Neel Mehta, Bodo Moeller]
1237 *) Allow engines to be "soft loaded" - i.e. optionally don't die if
1238 the load fails. Useful for distros.
1239 [Ben Laurie and the FreeBSD team]
1241 *) Add support for Local Machine Keyset attribute in PKCS#12 files.
1244 *) Fix BN_GF2m_mod_arr() top-bit cleanup code.
1247 *) Expand ENGINE to support engine supplied SSL client certificate functions.
1249 This work was sponsored by Logica.
1252 *) Add CryptoAPI ENGINE to support use of RSA and DSA keys held in Windows
1253 keystores. Support for SSL/TLS client authentication too.
1254 Not compiled unless enable-capieng specified to Configure.
1256 This work was sponsored by Logica.
1259 *) Fix bug in X509_ATTRIBUTE creation: dont set attribute using
1260 ASN1_TYPE_set1 if MBSTRING flag set. This bug would crash certain
1261 attribute creation routines such as certifcate requests and PKCS#12
1265 Changes between 0.9.8g and 0.9.8h [28 May 2008]
1267 *) Fix flaw if 'Server Key exchange message' is omitted from a TLS
1268 handshake which could lead to a cilent crash as found using the
1269 Codenomicon TLS test suite (CVE-2008-1672)
1270 [Steve Henson, Mark Cox]
1272 *) Fix double free in TLS server name extensions which could lead to
1273 a remote crash found by Codenomicon TLS test suite (CVE-2008-0891)
1276 *) Clear error queue in SSL_CTX_use_certificate_chain_file()
1278 Clear the error queue to ensure that error entries left from
1279 older function calls do not interfere with the correct operation.
1280 [Lutz Jaenicke, Erik de Castro Lopo]
1282 *) Remove root CA certificates of commercial CAs:
1284 The OpenSSL project does not recommend any specific CA and does not
1285 have any policy with respect to including or excluding any CA.
1286 Therefore it does not make any sense to ship an arbitrary selection
1287 of root CA certificates with the OpenSSL software.
1290 *) RSA OAEP patches to fix two separate invalid memory reads.
1291 The first one involves inputs when 'lzero' is greater than
1292 'SHA_DIGEST_LENGTH' (it would read about SHA_DIGEST_LENGTH bytes
1293 before the beginning of from). The second one involves inputs where
1294 the 'db' section contains nothing but zeroes (there is a one-byte
1295 invalid read after the end of 'db').
1296 [Ivan Nestlerode <inestlerode@us.ibm.com>]
1298 *) Partial backport from 0.9.9-dev:
1300 Introduce bn_mul_mont (dedicated Montgomery multiplication
1301 procedure) as a candidate for BIGNUM assembler implementation.
1302 While 0.9.9-dev uses assembler for various architectures, only
1303 x86_64 is available by default here in the 0.9.8 branch, and
1304 32-bit x86 is available through a compile-time setting.
1306 To try the 32-bit x86 assembler implementation, use Configure
1307 option "enable-montasm" (which exists only for this backport).
1309 As "enable-montasm" for 32-bit x86 disclaims code stability
1310 anyway, in this constellation we activate additional code
1311 backported from 0.9.9-dev for further performance improvements,
1312 namely BN_from_montgomery_word. (To enable this otherwise,
1313 e.g. x86_64, try "-DMONT_FROM_WORD___NON_DEFAULT_0_9_8_BUILD".)
1315 [Andy Polyakov (backport partially by Bodo Moeller)]
1317 *) Add TLS session ticket callback. This allows an application to set
1318 TLS ticket cipher and HMAC keys rather than relying on hardcoded fixed
1319 values. This is useful for key rollover for example where several key
1320 sets may exist with different names.
1323 *) Reverse ENGINE-internal logic for caching default ENGINE handles.
1324 This was broken until now in 0.9.8 releases, such that the only way
1325 a registered ENGINE could be used (assuming it initialises
1326 successfully on the host) was to explicitly set it as the default
1327 for the relevant algorithms. This is in contradiction with 0.9.7
1328 behaviour and the documentation. With this fix, when an ENGINE is
1329 registered into a given algorithm's table of implementations, the
1330 'uptodate' flag is reset so that auto-discovery will be used next
1331 time a new context for that algorithm attempts to select an
1333 [Ian Lister (tweaked by Geoff Thorpe)]
1335 *) Backport of CMS code to OpenSSL 0.9.8. This differs from the 0.9.9
1336 implemention in the following ways:
1338 Lack of EVP_PKEY_ASN1_METHOD means algorithm parameters have to be
1341 Lack of BER streaming support means one pass streaming processing is
1342 only supported if data is detached: setting the streaming flag is
1343 ignored for embedded content.
1345 CMS support is disabled by default and must be explicitly enabled
1346 with the enable-cms configuration option.
1349 *) Update the GMP engine glue to do direct copies between BIGNUM and
1350 mpz_t when openssl and GMP use the same limb size. Otherwise the
1351 existing "conversion via a text string export" trick is still used.
1352 [Paul Sheer <paulsheer@gmail.com>]
1354 *) Zlib compression BIO. This is a filter BIO which compressed and
1355 uncompresses any data passed through it.
1358 *) Add AES_wrap_key() and AES_unwrap_key() functions to implement
1359 RFC3394 compatible AES key wrapping.
1362 *) Add utility functions to handle ASN1 structures. ASN1_STRING_set0():
1363 sets string data without copying. X509_ALGOR_set0() and
1364 X509_ALGOR_get0(): set and retrieve X509_ALGOR (AlgorithmIdentifier)
1365 data. Attribute function X509at_get0_data_by_OBJ(): retrieves data
1366 from an X509_ATTRIBUTE structure optionally checking it occurs only
1367 once. ASN1_TYPE_set1(): set and ASN1_TYPE structure copying supplied
1371 *) Fix BN flag handling in RSA_eay_mod_exp() and BN_MONT_CTX_set()
1372 to get the expected BN_FLG_CONSTTIME behavior.
1373 [Bodo Moeller (Google)]
1377 - fixed wrong usage of ioctlsocket() when build for LIBC BSD sockets
1378 - fixed do_tests.pl to run the test suite with CLIB builds too (CLIB_OPT)
1379 - added some more tests to do_tests.pl
1380 - fixed RunningProcess usage so that it works with newer LIBC NDKs too
1381 - removed usage of BN_LLONG for CLIB builds to avoid runtime dependency
1382 - added new Configure targets netware-clib-bsdsock, netware-clib-gcc,
1383 netware-clib-bsdsock-gcc, netware-libc-bsdsock-gcc
1384 - various changes to netware.pl to enable gcc-cross builds on Win32
1386 - changed crypto/bio/b_sock.c to work with macro functions (CLIB BSD)
1387 - various changes to fix missing prototype warnings
1388 - fixed x86nasm.pl to create correct asm files for NASM COFF output
1389 - added AES, WHIRLPOOL and CPUID assembler code to build files
1390 - added missing AES assembler make rules to mk1mf.pl
1391 - fixed order of includes in apps/ocsp.c so that e_os.h settings apply
1392 [Guenter Knauf <eflash@gmx.net>]
1394 *) Implement certificate status request TLS extension defined in RFC3546.
1395 A client can set the appropriate parameters and receive the encoded
1396 OCSP response via a callback. A server can query the supplied parameters
1397 and set the encoded OCSP response in the callback. Add simplified examples
1398 to s_client and s_server.
1401 Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
1403 *) Fix various bugs:
1404 + Binary incompatibility of ssl_ctx_st structure
1405 + DTLS interoperation with non-compliant servers
1406 + Don't call get_session_cb() without proposed session
1407 + Fix ia64 assembler code
1408 [Andy Polyakov, Steve Henson]
1410 Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
1412 *) DTLS Handshake overhaul. There were longstanding issues with
1413 OpenSSL DTLS implementation, which were making it impossible for
1414 RFC 4347 compliant client to communicate with OpenSSL server.
1415 Unfortunately just fixing these incompatibilities would "cut off"
1416 pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
1417 server keeps tolerating non RFC compliant syntax. The opposite is
1418 not true, 0.9.8f client can not communicate with earlier server.
1419 This update even addresses CVE-2007-4995.
1422 *) Changes to avoid need for function casts in OpenSSL: some compilers
1423 (gcc 4.2 and later) reject their use.
1424 [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
1427 *) Add RFC4507 support to OpenSSL. This includes the corrections in
1428 RFC4507bis. The encrypted ticket format is an encrypted encoded
1429 SSL_SESSION structure, that way new session features are automatically
1432 If a client application caches session in an SSL_SESSION structure
1433 support is transparent because tickets are now stored in the encoded
1436 The SSL_CTX structure automatically generates keys for ticket
1437 protection in servers so again support should be possible
1438 with no application modification.
1440 If a client or server wishes to disable RFC4507 support then the option
1441 SSL_OP_NO_TICKET can be set.
1443 Add a TLS extension debugging callback to allow the contents of any client
1444 or server extensions to be examined.
1446 This work was sponsored by Google.
1449 *) Add initial support for TLS extensions, specifically for the server_name
1450 extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
1451 have new members for a host name. The SSL data structure has an
1452 additional member SSL_CTX *initial_ctx so that new sessions can be
1453 stored in that context to allow for session resumption, even after the
1454 SSL has been switched to a new SSL_CTX in reaction to a client's
1455 server_name extension.
1457 New functions (subject to change):
1459 SSL_get_servername()
1460 SSL_get_servername_type()
1463 New CTRL codes and macros (subject to change):
1465 SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
1466 - SSL_CTX_set_tlsext_servername_callback()
1467 SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
1468 - SSL_CTX_set_tlsext_servername_arg()
1469 SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
1471 openssl s_client has a new '-servername ...' option.
1473 openssl s_server has new options '-servername_host ...', '-cert2 ...',
1474 '-key2 ...', '-servername_fatal' (subject to change). This allows
1475 testing the HostName extension for a specific single host name ('-cert'
1476 and '-key' remain fallbacks for handshakes without HostName
1477 negotiation). If the unrecogninzed_name alert has to be sent, this by
1478 default is a warning; it becomes fatal with the '-servername_fatal'
1481 [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
1483 *) Add AES and SSE2 assembly language support to VC++ build.
1486 *) Mitigate attack on final subtraction in Montgomery reduction.
1489 *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
1490 (which previously caused an internal error).
1493 *) Squeeze another 10% out of IGE mode when in != out.
1496 *) AES IGE mode speedup.
1497 [Dean Gaudet (Google)]
1499 *) Add the Korean symmetric 128-bit cipher SEED (see
1500 http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
1501 add SEED ciphersuites from RFC 4162:
1503 TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
1504 TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
1505 TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
1506 TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
1508 To minimize changes between patchlevels in the OpenSSL 0.9.8
1509 series, SEED remains excluded from compilation unless OpenSSL
1510 is configured with 'enable-seed'.
1511 [KISA, Bodo Moeller]
1513 *) Mitigate branch prediction attacks, which can be practical if a
1514 single processor is shared, allowing a spy process to extract
1515 information. For detailed background information, see
1516 http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
1517 J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
1518 and Necessary Software Countermeasures"). The core of the change
1519 are new versions BN_div_no_branch() and
1520 BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
1521 respectively, which are slower, but avoid the security-relevant
1522 conditional branches. These are automatically called by BN_div()
1523 and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
1524 of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
1525 remove a conditional branch.
1527 BN_FLG_CONSTTIME is the new name for the previous
1528 BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
1529 modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
1530 in the exponent causes BN_mod_exp_mont() to use the alternative
1531 implementation in BN_mod_exp_mont_consttime().) The old name
1532 remains as a deprecated alias.
1534 Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
1535 RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
1536 constant-time implementations for more than just exponentiation.
1537 Here too the old name is kept as a deprecated alias.
1539 BN_BLINDING_new() will now use BN_dup() for the modulus so that
1540 the BN_BLINDING structure gets an independent copy of the
1541 modulus. This means that the previous "BIGNUM *m" argument to
1542 BN_BLINDING_new() and to BN_BLINDING_create_param() now
1543 essentially becomes "const BIGNUM *m", although we can't actually
1544 change this in the header file before 0.9.9. It allows
1545 RSA_setup_blinding() to use BN_with_flags() on the modulus to
1546 enable BN_FLG_CONSTTIME.
1548 [Matthew D Wood (Intel Corp)]
1550 *) In the SSL/TLS server implementation, be strict about session ID
1551 context matching (which matters if an application uses a single
1552 external cache for different purposes). Previously,
1553 out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
1554 set. This did ensure strict client verification, but meant that,
1555 with applications using a single external cache for quite
1556 different requirements, clients could circumvent ciphersuite
1557 restrictions for a given session ID context by starting a session
1558 in a different context.
1561 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
1562 a ciphersuite string such as "DEFAULT:RSA" cannot enable
1563 authentication-only ciphersuites.
1566 *) Update the SSL_get_shared_ciphers() fix CVE-2006-3738 which was
1567 not complete and could lead to a possible single byte overflow
1568 (CVE-2007-5135) [Ben Laurie]
1570 Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
1572 *) Since AES128 and AES256 (and similarly Camellia128 and
1573 Camellia256) share a single mask bit in the logic of
1574 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
1575 kludge to work properly if AES128 is available and AES256 isn't
1576 (or if Camellia128 is available and Camellia256 isn't).
1579 *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
1580 (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
1581 When a point or a seed is encoded in a BIT STRING, we need to
1582 prevent the removal of trailing zero bits to get the proper DER
1583 encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
1584 of a NamedBitList, for which trailing 0 bits need to be removed.)
1587 *) Have SSL/TLS server implementation tolerate "mismatched" record
1588 protocol version while receiving ClientHello even if the
1589 ClientHello is fragmented. (The server can't insist on the
1590 particular protocol version it has chosen before the ServerHello
1591 message has informed the client about his choice.)
1594 *) Add RFC 3779 support.
1595 [Rob Austein for ARIN, Ben Laurie]
1597 *) Load error codes if they are not already present instead of using a
1598 static variable. This allows them to be cleanly unloaded and reloaded.
1599 Improve header file function name parsing.
1602 *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
1603 or CAPABILITY handshake as required by RFCs.
1606 Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
1608 *) Introduce limits to prevent malicious keys being able to
1609 cause a denial of service. (CVE-2006-2940)
1610 [Steve Henson, Bodo Moeller]
1612 *) Fix ASN.1 parsing of certain invalid structures that can result
1613 in a denial of service. (CVE-2006-2937) [Steve Henson]
1615 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
1616 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
1618 *) Fix SSL client code which could crash if connecting to a
1619 malicious SSLv2 server. (CVE-2006-4343)
1620 [Tavis Ormandy and Will Drewry, Google Security Team]
1622 *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
1623 match only those. Before that, "AES256-SHA" would be interpreted
1624 as a pattern and match "AES128-SHA" too (since AES128-SHA got
1625 the same strength classification in 0.9.7h) as we currently only
1626 have a single AES bit in the ciphersuite description bitmap.
1627 That change, however, also applied to ciphersuite strings such as
1628 "RC4-MD5" that intentionally matched multiple ciphersuites --
1629 namely, SSL 2.0 ciphersuites in addition to the more common ones
1630 from SSL 3.0/TLS 1.0.
1632 So we change the selection algorithm again: Naming an explicit
1633 ciphersuite selects this one ciphersuite, and any other similar
1634 ciphersuite (same bitmap) from *other* protocol versions.
1635 Thus, "RC4-MD5" again will properly select both the SSL 2.0
1636 ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
1638 Since SSL 2.0 does not have any ciphersuites for which the
1639 128/256 bit distinction would be relevant, this works for now.
1640 The proper fix will be to use different bits for AES128 and
1641 AES256, which would have avoided the problems from the beginning;
1642 however, bits are scarce, so we can only do this in a new release
1643 (not just a patchlevel) when we can change the SSL_CIPHER
1644 definition to split the single 'unsigned long mask' bitmap into
1645 multiple values to extend the available space.
1649 Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
1651 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
1652 (CVE-2006-4339) [Ben Laurie and Google Security Team]
1654 *) Add AES IGE and biIGE modes.
1657 *) Change the Unix randomness entropy gathering to use poll() when
1658 possible instead of select(), since the latter has some
1659 undesirable limitations.
1660 [Darryl Miles via Richard Levitte and Bodo Moeller]
1662 *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
1663 treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
1664 cannot be implicitly activated as part of, e.g., the "AES" alias.
1665 However, please upgrade to OpenSSL 0.9.9[-dev] for
1666 non-experimental use of the ECC ciphersuites to get TLS extension
1667 support, which is required for curve and point format negotiation
1668 to avoid potential handshake problems.
1671 *) Disable rogue ciphersuites:
1673 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
1674 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
1675 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
1677 The latter two were purportedly from
1678 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
1681 Also deactivate the remaining ciphersuites from
1682 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
1683 unofficial, and the ID has long expired.
1686 *) Fix RSA blinding Heisenbug (problems sometimes occured on
1687 dual-core machines) and other potential thread-safety issues.
1690 *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
1691 versions), which is now available for royalty-free use
1692 (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
1693 Also, add Camellia TLS ciphersuites from RFC 4132.
1695 To minimize changes between patchlevels in the OpenSSL 0.9.8
1696 series, Camellia remains excluded from compilation unless OpenSSL
1697 is configured with 'enable-camellia'.
1700 *) Disable the padding bug check when compression is in use. The padding
1701 bug check assumes the first packet is of even length, this is not
1702 necessarily true if compresssion is enabled and can result in false
1703 positives causing handshake failure. The actual bug test is ancient
1704 code so it is hoped that implementations will either have fixed it by
1705 now or any which still have the bug do not support compression.
1708 Changes between 0.9.8a and 0.9.8b [04 May 2006]
1710 *) When applying a cipher rule check to see if string match is an explicit
1711 cipher suite and only match that one cipher suite if it is.
1714 *) Link in manifests for VC++ if needed.
1715 [Austin Ziegler <halostatue@gmail.com>]
1717 *) Update support for ECC-based TLS ciphersuites according to
1718 draft-ietf-tls-ecc-12.txt with proposed changes (but without
1719 TLS extensions, which are supported starting with the 0.9.9
1720 branch, not in the OpenSSL 0.9.8 branch).
1723 *) New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free() to support
1724 opaque EVP_CIPHER_CTX handling.
1727 *) Fixes and enhancements to zlib compression code. We now only use
1728 "zlib1.dll" and use the default __cdecl calling convention on Win32
1729 to conform with the standards mentioned here:
1730 http://www.zlib.net/DLL_FAQ.txt
1731 Static zlib linking now works on Windows and the new --with-zlib-include
1732 --with-zlib-lib options to Configure can be used to supply the location
1733 of the headers and library. Gracefully handle case where zlib library
1737 *) Several fixes and enhancements to the OID generation code. The old code
1738 sometimes allowed invalid OIDs (1.X for X >= 40 for example), couldn't
1739 handle numbers larger than ULONG_MAX, truncated printing and had a
1740 non standard OBJ_obj2txt() behaviour.
1743 *) Add support for building of engines under engine/ as shared libraries
1744 under VC++ build system.
1747 *) Corrected the numerous bugs in the Win32 path splitter in DSO.
1748 Hopefully, we will not see any false combination of paths any more.
1751 Changes between 0.9.8 and 0.9.8a [11 Oct 2005]
1753 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
1754 (part of SSL_OP_ALL). This option used to disable the
1755 countermeasure against man-in-the-middle protocol-version
1756 rollback in the SSL 2.0 server implementation, which is a bad
1757 idea. (CVE-2005-2969)
1759 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
1760 for Information Security, National Institute of Advanced Industrial
1761 Science and Technology [AIST], Japan)]
1763 *) Add two function to clear and return the verify parameter flags.
1766 *) Keep cipherlists sorted in the source instead of sorting them at
1767 runtime, thus removing the need for a lock.
1770 *) Avoid some small subgroup attacks in Diffie-Hellman.
1771 [Nick Mathewson and Ben Laurie]
1773 *) Add functions for well-known primes.
1776 *) Extended Windows CE support.
1777 [Satoshi Nakamura and Andy Polyakov]
1779 *) Initialize SSL_METHOD structures at compile time instead of during
1780 runtime, thus removing the need for a lock.
1783 *) Make PKCS7_decrypt() work even if no certificate is supplied by
1784 attempting to decrypt each encrypted key in turn. Add support to
1788 Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
1790 [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
1793 *) Add libcrypto.pc and libssl.pc for those who feel they need them.
1796 *) Change CA.sh and CA.pl so they don't bundle the CSR and the private
1797 key into the same file any more.
1800 *) Add initial support for Win64, both IA64 and AMD64/x64 flavors.
1803 *) Add -utf8 command line and config file option to 'ca'.
1804 [Stefan <stf@udoma.org]
1806 *) Removed the macro des_crypt(), as it seems to conflict with some
1807 libraries. Use DES_crypt().
1810 *) Correct naming of the 'chil' and '4758cca' ENGINEs. This
1811 involves renaming the source and generated shared-libs for
1812 both. The engines will accept the corrected or legacy ids
1813 ('ncipher' and '4758_cca' respectively) when binding. NB,
1814 this only applies when building 'shared'.
1815 [Corinna Vinschen <vinschen@redhat.com> and Geoff Thorpe]
1817 *) Add attribute functions to EVP_PKEY structure. Modify
1818 PKCS12_create() to recognize a CSP name attribute and
1819 use it. Make -CSP option work again in pkcs12 utility.
1822 *) Add new functionality to the bn blinding code:
1823 - automatic re-creation of the BN_BLINDING parameters after
1824 a fixed number of uses (currently 32)
1825 - add new function for parameter creation
1826 - introduce flags to control the update behaviour of the
1827 BN_BLINDING parameters
1828 - hide BN_BLINDING structure
1829 Add a second BN_BLINDING slot to the RSA structure to improve
1830 performance when a single RSA object is shared among several
1834 *) Add support for DTLS.
1835 [Nagendra Modadugu <nagendra@cs.stanford.edu> and Ben Laurie]
1837 *) Add support for DER encoded private keys (SSL_FILETYPE_ASN1)
1838 to SSL_CTX_use_PrivateKey_file() and SSL_use_PrivateKey_file()
1841 *) Remove buggy and incompletet DH cert support from
1842 ssl/ssl_rsa.c and ssl/s3_both.c
1845 *) Use SHA-1 instead of MD5 as the default digest algorithm for
1846 the apps/openssl applications.
1849 *) Compile clean with "-Wall -Wmissing-prototypes
1850 -Wstrict-prototypes -Wmissing-declarations -Werror". Currently
1851 DEBUG_SAFESTACK must also be set.
1854 *) Change ./Configure so that certain algorithms can be disabled by default.
1855 The new counterpiece to "no-xxx" is "enable-xxx".
1857 The patented RC5 and MDC2 algorithms will now be disabled unless
1858 "enable-rc5" and "enable-mdc2", respectively, are specified.
1860 (IDEA remains enabled despite being patented. This is because IDEA
1861 is frequently required for interoperability, and there is no license
1862 fee for non-commercial use. As before, "no-idea" can be used to
1863 avoid this algorithm.)
1867 *) Add processing of proxy certificates (see RFC 3820). This work was
1868 sponsored by KTH (The Royal Institute of Technology in Stockholm) and
1869 EGEE (Enabling Grids for E-science in Europe).
1872 *) RC4 performance overhaul on modern architectures/implementations, such
1873 as Intel P4, IA-64 and AMD64.
1876 *) New utility extract-section.pl. This can be used specify an alternative
1877 section number in a pod file instead of having to treat each file as
1878 a separate case in Makefile. This can be done by adding two lines to the
1881 =for comment openssl_section:XXX
1883 The blank line is mandatory.
1887 *) New arguments -certform, -keyform and -pass for s_client and s_server
1888 to allow alternative format key and certificate files and passphrase
1892 *) New structure X509_VERIFY_PARAM which combines current verify parameters,
1893 update associated structures and add various utility functions.
1895 Add new policy related verify parameters, include policy checking in
1896 standard verify code. Enhance 'smime' application with extra parameters
1897 to support policy checking and print out.
1900 *) Add a new engine to support VIA PadLock ACE extensions in the VIA C3
1901 Nehemiah processors. These extensions support AES encryption in hardware
1902 as well as RNG (though RNG support is currently disabled).
1903 [Michal Ludvig <michal@logix.cz>, with help from Andy Polyakov]
1905 *) Deprecate BN_[get|set]_params() functions (they were ignored internally).
1908 *) New FIPS 180-2 algorithms, SHA-224/-256/-384/-512 are implemented.
1909 [Andy Polyakov and a number of other people]
1911 *) Improved PowerPC platform support. Most notably BIGNUM assembler
1912 implementation contributed by IBM.
1913 [Suresh Chari, Peter Waltenberg, Andy Polyakov]
1915 *) The new 'RSA_generate_key_ex' function now takes a BIGNUM for the public
1916 exponent rather than 'unsigned long'. There is a corresponding change to
1917 the new 'rsa_keygen' element of the RSA_METHOD structure.
1918 [Jelte Jansen, Geoff Thorpe]
1920 *) Functionality for creating the initial serial number file is now
1921 moved from CA.pl to the 'ca' utility with a new option -create_serial.
1923 (Before OpenSSL 0.9.7e, CA.pl used to initialize the serial
1924 number file to 1, which is bound to cause problems. To avoid
1925 the problems while respecting compatibility between different 0.9.7
1926 patchlevels, 0.9.7e employed 'openssl x509 -next_serial' in
1927 CA.pl for serial number initialization. With the new release 0.9.8,
1928 we can fix the problem directly in the 'ca' utility.)
1931 *) Reduced header interdepencies by declaring more opaque objects in
1932 ossl_typ.h. As a consequence, including some headers (eg. engine.h) will
1933 give fewer recursive includes, which could break lazy source code - so
1934 this change is covered by the OPENSSL_NO_DEPRECATED symbol. As always,
1935 developers should define this symbol when building and using openssl to
1936 ensure they track the recommended behaviour, interfaces, [etc], but
1937 backwards-compatible behaviour prevails when this isn't defined.
1940 *) New function X509_POLICY_NODE_print() which prints out policy nodes.
1943 *) Add new EVP function EVP_CIPHER_CTX_rand_key and associated functionality.
1944 This will generate a random key of the appropriate length based on the
1945 cipher context. The EVP_CIPHER can provide its own random key generation
1946 routine to support keys of a specific form. This is used in the des and
1947 3des routines to generate a key of the correct parity. Update S/MIME
1948 code to use new functions and hence generate correct parity DES keys.
1949 Add EVP_CHECK_DES_KEY #define to return an error if the key is not
1950 valid (weak or incorrect parity).
1953 *) Add a local set of CRLs that can be used by X509_verify_cert() as well
1954 as looking them up. This is useful when the verified structure may contain
1955 CRLs, for example PKCS#7 signedData. Modify PKCS7_verify() to use any CRLs
1956 present unless the new PKCS7_NO_CRL flag is asserted.
1959 *) Extend ASN1 oid configuration module. It now additionally accepts the
1962 shortName = some long name, 1.2.3.4
1965 *) Reimplemented the BN_CTX implementation. There is now no more static
1966 limitation on the number of variables it can handle nor the depth of the
1967 "stack" handling for BN_CTX_start()/BN_CTX_end() pairs. The stack
1968 information can now expand as required, and rather than having a single
1969 static array of bignums, BN_CTX now uses a linked-list of such arrays
1970 allowing it to expand on demand whilst maintaining the usefulness of
1971 BN_CTX's "bundling".
1974 *) Add a missing BN_CTX parameter to the 'rsa_mod_exp' callback in RSA_METHOD
1975 to allow all RSA operations to function using a single BN_CTX.
1978 *) Preliminary support for certificate policy evaluation and checking. This
1979 is initially intended to pass the tests outlined in "Conformance Testing
1980 of Relying Party Client Certificate Path Processing Logic" v1.07.
1983 *) bn_dup_expand() has been deprecated, it was introduced in 0.9.7 and
1984 remained unused and not that useful. A variety of other little bignum
1985 tweaks and fixes have also been made continuing on from the audit (see
1989 *) Constify all or almost all d2i, c2i, s2i and r2i functions, along with
1990 associated ASN1, EVP and SSL functions and old ASN1 macros.
1993 *) BN_zero() only needs to set 'top' and 'neg' to zero for correct results,
1994 and this should never fail. So the return value from the use of
1995 BN_set_word() (which can fail due to needless expansion) is now deprecated;
1996 if OPENSSL_NO_DEPRECATED is defined, BN_zero() is a void macro.
1999 *) BN_CTX_get() should return zero-valued bignums, providing the same
2000 initialised value as BN_new().
2001 [Geoff Thorpe, suggested by Ulf Möller]
2003 *) Support for inhibitAnyPolicy certificate extension.
2006 *) An audit of the BIGNUM code is underway, for which debugging code is
2007 enabled when BN_DEBUG is defined. This makes stricter enforcements on what
2008 is considered valid when processing BIGNUMs, and causes execution to
2009 assert() when a problem is discovered. If BN_DEBUG_RAND is defined,
2010 further steps are taken to deliberately pollute unused data in BIGNUM
2011 structures to try and expose faulty code further on. For now, openssl will
2012 (in its default mode of operation) continue to tolerate the inconsistent
2013 forms that it has tolerated in the past, but authors and packagers should
2014 consider trying openssl and their own applications when compiled with
2015 these debugging symbols defined. It will help highlight potential bugs in
2016 their own code, and will improve the test coverage for OpenSSL itself. At
2017 some point, these tighter rules will become openssl's default to improve
2018 maintainability, though the assert()s and other overheads will remain only
2019 in debugging configurations. See bn.h for more details.
2020 [Geoff Thorpe, Nils Larsch, Ulf Möller]
2022 *) BN_CTX_init() has been deprecated, as BN_CTX is an opaque structure
2023 that can only be obtained through BN_CTX_new() (which implicitly
2024 initialises it). The presence of this function only made it possible
2025 to overwrite an existing structure (and cause memory leaks).
2028 *) Because of the callback-based approach for implementing LHASH as a
2029 template type, lh_insert() adds opaque objects to hash-tables and
2030 lh_doall() or lh_doall_arg() are typically used with a destructor callback
2031 to clean up those corresponding objects before destroying the hash table
2032 (and losing the object pointers). So some over-zealous constifications in
2033 LHASH have been relaxed so that lh_insert() does not take (nor store) the
2034 objects as "const" and the lh_doall[_arg] callback wrappers are not
2035 prototyped to have "const" restrictions on the object pointers they are
2036 given (and so aren't required to cast them away any more).
2039 *) The tmdiff.h API was so ugly and minimal that our own timing utility
2040 (speed) prefers to use its own implementation. The two implementations
2041 haven't been consolidated as yet (volunteers?) but the tmdiff API has had
2042 its object type properly exposed (MS_TM) instead of casting to/from "char
2043 *". This may still change yet if someone realises MS_TM and "ms_time_***"
2044 aren't necessarily the greatest nomenclatures - but this is what was used
2045 internally to the implementation so I've used that for now.
2048 *) Ensure that deprecated functions do not get compiled when
2049 OPENSSL_NO_DEPRECATED is defined. Some "openssl" subcommands and a few of
2050 the self-tests were still using deprecated key-generation functions so
2051 these have been updated also.
2054 *) Reorganise PKCS#7 code to separate the digest location functionality
2055 into PKCS7_find_digest(), digest addtion into PKCS7_bio_add_digest().
2056 New function PKCS7_set_digest() to set the digest type for PKCS#7
2057 digestedData type. Add additional code to correctly generate the
2058 digestedData type and add support for this type in PKCS7 initialization
2062 *) New function PKCS7_set0_type_other() this initializes a PKCS7
2063 structure of type "other".
2066 *) Fix prime generation loop in crypto/bn/bn_prime.pl by making
2067 sure the loop does correctly stop and breaking ("division by zero")
2068 modulus operations are not performed. The (pre-generated) prime
2069 table crypto/bn/bn_prime.h was already correct, but it could not be
2070 re-generated on some platforms because of the "division by zero"
2071 situation in the script.
2072 [Ralf S. Engelschall]
2074 *) Update support for ECC-based TLS ciphersuites according to
2075 draft-ietf-tls-ecc-03.txt: the KDF1 key derivation function with
2076 SHA-1 now is only used for "small" curves (where the
2077 representation of a field element takes up to 24 bytes); for
2078 larger curves, the field element resulting from ECDH is directly
2079 used as premaster secret.
2080 [Douglas Stebila (Sun Microsystems Laboratories)]
2082 *) Add code for kP+lQ timings to crypto/ec/ectest.c, and add SEC2
2083 curve secp160r1 to the tests.
2084 [Douglas Stebila (Sun Microsystems Laboratories)]
2086 *) Add the possibility to load symbols globally with DSO.
2087 [Götz Babin-Ebell <babin-ebell@trustcenter.de> via Richard Levitte]
2089 *) Add the functions ERR_set_mark() and ERR_pop_to_mark() for better
2090 control of the error stack.
2093 *) Add support for STORE in ENGINE.
2096 *) Add the STORE type. The intention is to provide a common interface
2097 to certificate and key stores, be they simple file-based stores, or
2098 HSM-type store, or LDAP stores, or...
2099 NOTE: The code is currently UNTESTED and isn't really used anywhere.
2102 *) Add a generic structure called OPENSSL_ITEM. This can be used to
2103 pass a list of arguments to any function as well as provide a way
2104 for a function to pass data back to the caller.
2107 *) Add the functions BUF_strndup() and BUF_memdup(). BUF_strndup()
2108 works like BUF_strdup() but can be used to duplicate a portion of
2109 a string. The copy gets NUL-terminated. BUF_memdup() duplicates
2113 *) Add the function sk_find_ex() which works like sk_find(), but will
2114 return an index to an element even if an exact match couldn't be
2115 found. The index is guaranteed to point at the element where the
2116 searched-for key would be inserted to preserve sorting order.
2119 *) Add the function OBJ_bsearch_ex() which works like OBJ_bsearch() but
2120 takes an extra flags argument for optional functionality. Currently,
2121 the following flags are defined:
2123 OBJ_BSEARCH_VALUE_ON_NOMATCH
2124 This one gets OBJ_bsearch_ex() to return a pointer to the first
2125 element where the comparing function returns a negative or zero
2128 OBJ_BSEARCH_FIRST_VALUE_ON_MATCH
2129 This one gets OBJ_bsearch_ex() to return a pointer to the first
2130 element where the comparing function returns zero. This is useful
2131 if there are more than one element where the comparing function
2135 *) Make it possible to create self-signed certificates with 'openssl ca'
2136 in such a way that the self-signed certificate becomes part of the
2137 CA database and uses the same mechanisms for serial number generation
2138 as all other certificate signing. The new flag '-selfsign' enables
2139 this functionality. Adapt CA.sh and CA.pl.in.
2142 *) Add functionality to check the public key of a certificate request
2143 against a given private. This is useful to check that a certificate
2144 request can be signed by that key (self-signing).
2147 *) Make it possible to have multiple active certificates with the same
2148 subject in the CA index file. This is done only if the keyword
2149 'unique_subject' is set to 'no' in the main CA section (default
2150 if 'CA_default') of the configuration file. The value is saved
2151 with the database itself in a separate index attribute file,
2152 named like the index file with '.attr' appended to the name.
2155 *) Generate muti valued AVAs using '+' notation in config files for
2159 *) Support for nameConstraints certificate extension.
2162 *) Support for policyConstraints certificate extension.
2165 *) Support for policyMappings certificate extension.
2168 *) Make sure the default DSA_METHOD implementation only uses its
2169 dsa_mod_exp() and/or bn_mod_exp() handlers if they are non-NULL,
2170 and change its own handlers to be NULL so as to remove unnecessary
2171 indirection. This lets alternative implementations fallback to the
2172 default implementation more easily.
2175 *) Support for directoryName in GeneralName related extensions
2179 *) Make it possible to link applications using Makefile.shared.
2180 Make that possible even when linking against static libraries!
2183 *) Support for single pass processing for S/MIME signing. This now
2184 means that S/MIME signing can be done from a pipe, in addition
2185 cleartext signing (multipart/signed type) is effectively streaming
2186 and the signed data does not need to be all held in memory.
2188 This is done with a new flag PKCS7_STREAM. When this flag is set
2189 PKCS7_sign() only initializes the PKCS7 structure and the actual signing
2190 is done after the data is output (and digests calculated) in
2191 SMIME_write_PKCS7().
2194 *) Add full support for -rpath/-R, both in shared libraries and
2195 applications, at least on the platforms where it's known how
2199 *) In crypto/ec/ec_mult.c, implement fast point multiplication with
2200 precomputation, based on wNAF splitting: EC_GROUP_precompute_mult()
2201 will now compute a table of multiples of the generator that
2202 makes subsequent invocations of EC_POINTs_mul() or EC_POINT_mul()
2203 faster (notably in the case of a single point multiplication,
2204 scalar * generator).
2205 [Nils Larsch, Bodo Moeller]
2207 *) IPv6 support for certificate extensions. The various extensions
2208 which use the IP:a.b.c.d can now take IPv6 addresses using the
2209 formats of RFC1884 2.2 . IPv6 addresses are now also displayed
2213 *) Added an ENGINE that implements RSA by performing private key
2214 exponentiations with the GMP library. The conversions to and from
2215 GMP's mpz_t format aren't optimised nor are any montgomery forms
2216 cached, and on x86 it appears OpenSSL's own performance has caught up.
2217 However there are likely to be other architectures where GMP could
2218 provide a boost. This ENGINE is not built in by default, but it can be
2219 specified at Configure time and should be accompanied by the necessary
2220 linker additions, eg;
2221 ./config -DOPENSSL_USE_GMP -lgmp
2224 *) "openssl engine" will not display ENGINE/DSO load failure errors when
2225 testing availability of engines with "-t" - the old behaviour is
2226 produced by increasing the feature's verbosity with "-tt".
2229 *) ECDSA routines: under certain error conditions uninitialized BN objects
2230 could be freed. Solution: make sure initialization is performed early
2231 enough. (Reported and fix supplied by Nils Larsch <nla@trustcenter.de>
2235 *) Key-generation can now be implemented in RSA_METHOD, DSA_METHOD
2236 and DH_METHOD (eg. by ENGINE implementations) to override the normal
2237 software implementations. For DSA and DH, parameter generation can
2238 also be overriden by providing the appropriate method callbacks.
2241 *) Change the "progress" mechanism used in key-generation and
2242 primality testing to functions that take a new BN_GENCB pointer in
2243 place of callback/argument pairs. The new API functions have "_ex"
2244 postfixes and the older functions are reimplemented as wrappers for
2245 the new ones. The OPENSSL_NO_DEPRECATED symbol can be used to hide
2246 declarations of the old functions to help (graceful) attempts to
2247 migrate to the new functions. Also, the new key-generation API
2248 functions operate on a caller-supplied key-structure and return
2249 success/failure rather than returning a key or NULL - this is to
2250 help make "keygen" another member function of RSA_METHOD etc.
2252 Example for using the new callback interface:
2254 int (*my_callback)(int a, int b, BN_GENCB *cb) = ...;
2258 BN_GENCB_set(&my_cb, my_callback, my_arg);
2260 return BN_is_prime_ex(some_bignum, BN_prime_checks, NULL, &cb);
2261 /* For the meaning of a, b in calls to my_callback(), see the
2262 * documentation of the function that calls the callback.
2263 * cb will point to my_cb; my_arg can be retrieved as cb->arg.
2264 * my_callback should return 1 if it wants BN_is_prime_ex()
2265 * to continue, or 0 to stop.
2270 *) Change the ZLIB compression method to be stateful, and make it
2271 available to TLS with the number defined in
2272 draft-ietf-tls-compression-04.txt.
2275 *) Add the ASN.1 structures and functions for CertificatePair, which
2276 is defined as follows (according to X.509_4thEditionDraftV6.pdf):
2278 CertificatePair ::= SEQUENCE {
2279 forward [0] Certificate OPTIONAL,
2280 reverse [1] Certificate OPTIONAL,
2281 -- at least one of the pair shall be present -- }
2283 Also implement the PEM functions to read and write certificate
2284 pairs, and defined the PEM tag as "CERTIFICATE PAIR".
2286 This needed to be defined, mostly for the sake of the LDAP
2287 attribute crossCertificatePair, but may prove useful elsewhere as
2291 *) Make it possible to inhibit symlinking of shared libraries in
2292 Makefile.shared, for Cygwin's sake.
2295 *) Extend the BIGNUM API by creating a function
2296 void BN_set_negative(BIGNUM *a, int neg);
2297 and a macro that behave like
2298 int BN_is_negative(const BIGNUM *a);
2300 to avoid the need to access 'a->neg' directly in applications.
2303 *) Implement fast modular reduction for pseudo-Mersenne primes
2304 used in NIST curves (crypto/bn/bn_nist.c, crypto/ec/ecp_nist.c).
2305 EC_GROUP_new_curve_GFp() will now automatically use this
2307 [Nils Larsch <nla@trustcenter.de>]
2309 *) Add new lock type (CRYPTO_LOCK_BN).
2312 *) Change the ENGINE framework to automatically load engines
2313 dynamically from specific directories unless they could be
2314 found to already be built in or loaded. Move all the
2315 current engines except for the cryptodev one to a new
2317 The engines in engines/ are built as shared libraries if
2318 the "shared" options was given to ./Configure or ./config.
2319 Otherwise, they are inserted in libcrypto.a.
2320 /usr/local/ssl/engines is the default directory for dynamic
2321 engines, but that can be overriden at configure time through
2322 the usual use of --prefix and/or --openssldir, and at run
2323 time with the environment variable OPENSSL_ENGINES.
2324 [Geoff Thorpe and Richard Levitte]
2326 *) Add Makefile.shared, a helper makefile to build shared
2327 libraries. Addapt Makefile.org.
2330 *) Add version info to Win32 DLLs.
2331 [Peter 'Luna' Runestig" <peter@runestig.com>]
2333 *) Add new 'medium level' PKCS#12 API. Certificates and keys
2334 can be added using this API to created arbitrary PKCS#12
2335 files while avoiding the low level API.
2337 New options to PKCS12_create(), key or cert can be NULL and
2338 will then be omitted from the output file. The encryption
2339 algorithm NIDs can be set to -1 for no encryption, the mac
2340 iteration count can be set to 0 to omit the mac.
2342 Enhance pkcs12 utility by making the -nokeys and -nocerts
2343 options work when creating a PKCS#12 file. New option -nomac
2344 to omit the mac, NONE can be set for an encryption algorithm.
2345 New code is modified to use the enhanced PKCS12_create()
2346 instead of the low level API.
2349 *) Extend ASN1 encoder to support indefinite length constructed
2350 encoding. This can output sequences tags and octet strings in
2351 this form. Modify pk7_asn1.c to support indefinite length
2352 encoding. This is experimental and needs additional code to
2353 be useful, such as an ASN1 bio and some enhanced streaming
2356 Extend template encode functionality so that tagging is passed
2357 down to the template encoder.
2360 *) Let 'openssl req' fail if an argument to '-newkey' is not
2361 recognized instead of using RSA as a default.
2364 *) Add support for ECC-based ciphersuites from draft-ietf-tls-ecc-01.txt.
2365 As these are not official, they are not included in "ALL";
2366 the "ECCdraft" ciphersuite group alias can be used to select them.
2367 [Vipul Gupta and Sumit Gupta (Sun Microsystems Laboratories)]
2369 *) Add ECDH engine support.
2370 [Nils Gura and Douglas Stebila (Sun Microsystems Laboratories)]
2372 *) Add ECDH in new directory crypto/ecdh/.
2373 [Douglas Stebila (Sun Microsystems Laboratories)]
2375 *) Let BN_rand_range() abort with an error after 100 iterations
2376 without success (which indicates a broken PRNG).
2379 *) Change BN_mod_sqrt() so that it verifies that the input value
2380 is really the square of the return value. (Previously,
2381 BN_mod_sqrt would show GIGO behaviour.)
2384 *) Add named elliptic curves over binary fields from X9.62, SECG,
2385 and WAP/WTLS; add OIDs that were still missing.
2387 [Sheueling Chang Shantz and Douglas Stebila
2388 (Sun Microsystems Laboratories)]
2390 *) Extend the EC library for elliptic curves over binary fields
2391 (new files ec2_smpl.c, ec2_smpt.c, ec2_mult.c in crypto/ec/).
2394 EC_GF2m_simple_method
2398 EC_GROUP_new_curve_GF2m
2399 EC_GROUP_set_curve_GF2m
2400 EC_GROUP_get_curve_GF2m
2401 EC_POINT_set_affine_coordinates_GF2m
2402 EC_POINT_get_affine_coordinates_GF2m
2403 EC_POINT_set_compressed_coordinates_GF2m
2405 Point compression for binary fields is disabled by default for
2406 patent reasons (compile with OPENSSL_EC_BIN_PT_COMP defined to
2409 As binary polynomials are represented as BIGNUMs, various members
2410 of the EC_GROUP and EC_POINT data structures can be shared
2411 between the implementations for prime fields and binary fields;
2412 the above ..._GF2m functions (except for EX_GROUP_new_curve_GF2m)
2413 are essentially identical to their ..._GFp counterparts.
2414 (For simplicity, the '..._GFp' prefix has been dropped from
2415 various internal method names.)
2417 An internal 'field_div' method (similar to 'field_mul' and
2418 'field_sqr') has been added; this is used only for binary fields.
2420 [Sheueling Chang Shantz and Douglas Stebila
2421 (Sun Microsystems Laboratories)]
2423 *) Optionally dispatch EC_POINT_mul(), EC_POINT_precompute_mult()
2424 through methods ('mul', 'precompute_mult').
2426 The generic implementations (now internally called 'ec_wNAF_mul'
2427 and 'ec_wNAF_precomputed_mult') remain the default if these
2428 methods are undefined.
2430 [Sheueling Chang Shantz and Douglas Stebila
2431 (Sun Microsystems Laboratories)]
2433 *) New function EC_GROUP_get_degree, which is defined through
2434 EC_METHOD. For curves over prime fields, this returns the bit
2435 length of the modulus.
2437 [Sheueling Chang Shantz and Douglas Stebila
2438 (Sun Microsystems Laboratories)]
2440 *) New functions EC_GROUP_dup, EC_POINT_dup.
2441 (These simply call ..._new and ..._copy).
2443 [Sheueling Chang Shantz and Douglas Stebila
2444 (Sun Microsystems Laboratories)]
2446 *) Add binary polynomial arithmetic software in crypto/bn/bn_gf2m.c.
2447 Polynomials are represented as BIGNUMs (where the sign bit is not
2448 used) in the following functions [macros]:
2451 BN_GF2m_sub [= BN_GF2m_add]
2452 BN_GF2m_mod [wrapper for BN_GF2m_mod_arr]
2453 BN_GF2m_mod_mul [wrapper for BN_GF2m_mod_mul_arr]
2454 BN_GF2m_mod_sqr [wrapper for BN_GF2m_mod_sqr_arr]
2456 BN_GF2m_mod_exp [wrapper for BN_GF2m_mod_exp_arr]
2457 BN_GF2m_mod_sqrt [wrapper for BN_GF2m_mod_sqrt_arr]
2458 BN_GF2m_mod_solve_quad [wrapper for BN_GF2m_mod_solve_quad_arr]
2459 BN_GF2m_cmp [= BN_ucmp]
2461 (Note that only the 'mod' functions are actually for fields GF(2^m).
2462 BN_GF2m_add() is misnomer, but this is for the sake of consistency.)
2464 For some functions, an the irreducible polynomial defining a
2465 field can be given as an 'unsigned int[]' with strictly
2466 decreasing elements giving the indices of those bits that are set;
2467 i.e., p[] represents the polynomial
2468 f(t) = t^p[0] + t^p[1] + ... + t^p[k]
2470 p[0] > p[1] > ... > p[k] = 0.
2471 This applies to the following functions:
2476 BN_GF2m_mod_inv_arr [wrapper for BN_GF2m_mod_inv]
2477 BN_GF2m_mod_div_arr [wrapper for BN_GF2m_mod_div]
2479 BN_GF2m_mod_sqrt_arr
2480 BN_GF2m_mod_solve_quad_arr
2484 Conversion can be performed by the following functions:
2489 bntest.c has additional tests for binary polynomial arithmetic.
2491 Two implementations for BN_GF2m_mod_div() are available.
2492 The default algorithm simply uses BN_GF2m_mod_inv() and
2493 BN_GF2m_mod_mul(). The alternative algorithm is compiled in only
2494 if OPENSSL_SUN_GF2M_DIV is defined (patent pending; read the
2495 copyright notice in crypto/bn/bn_gf2m.c before enabling it).
2497 [Sheueling Chang Shantz and Douglas Stebila
2498 (Sun Microsystems Laboratories)]
2500 *) Add new error code 'ERR_R_DISABLED' that can be used when some
2501 functionality is disabled at compile-time.
2502 [Douglas Stebila <douglas.stebila@sun.com>]
2504 *) Change default behaviour of 'openssl asn1parse' so that more
2505 information is visible when viewing, e.g., a certificate:
2507 Modify asn1_parse2 (crypto/asn1/asn1_par.c) so that in non-'dump'
2508 mode the content of non-printable OCTET STRINGs is output in a
2509 style similar to INTEGERs, but with '[HEX DUMP]' prepended to
2510 avoid the appearance of a printable string.
2511 [Nils Larsch <nla@trustcenter.de>]
2513 *) Add 'asn1_flag' and 'asn1_form' member to EC_GROUP with access
2515 EC_GROUP_set_asn1_flag()
2516 EC_GROUP_get_asn1_flag()
2517 EC_GROUP_set_point_conversion_form()
2518 EC_GROUP_get_point_conversion_form()
2519 These control ASN1 encoding details:
2520 - Curves (i.e., groups) are encoded explicitly unless asn1_flag
2521 has been set to OPENSSL_EC_NAMED_CURVE.
2522 - Points are encoded in uncompressed form by default; options for
2523 asn1_for are as for point2oct, namely
2524 POINT_CONVERSION_COMPRESSED
2525 POINT_CONVERSION_UNCOMPRESSED
2526 POINT_CONVERSION_HYBRID
2528 Also add 'seed' and 'seed_len' members to EC_GROUP with access
2531 EC_GROUP_get0_seed()
2532 EC_GROUP_get_seed_len()
2533 This is used only for ASN1 purposes (so far).
2534 [Nils Larsch <nla@trustcenter.de>]
2536 *) Add 'field_type' member to EC_METHOD, which holds the NID
2537 of the appropriate field type OID. The new function
2538 EC_METHOD_get_field_type() returns this value.
2539 [Nils Larsch <nla@trustcenter.de>]
2544 EC_POINT_point2hex()
2545 EC_POINT_hex2point()
2546 providing useful interfaces to EC_POINT_point2oct() and
2547 EC_POINT_oct2point().
2548 [Nils Larsch <nla@trustcenter.de>]
2550 *) Change internals of the EC library so that the functions
2551 EC_GROUP_set_generator()
2552 EC_GROUP_get_generator()
2553 EC_GROUP_get_order()
2554 EC_GROUP_get_cofactor()
2555 are implemented directly in crypto/ec/ec_lib.c and not dispatched
2556 to methods, which would lead to unnecessary code duplication when
2557 adding different types of curves.
2558 [Nils Larsch <nla@trustcenter.de> with input by Bodo Moeller]
2560 *) Implement compute_wNAF (crypto/ec/ec_mult.c) without BIGNUM
2561 arithmetic, and such that modified wNAFs are generated
2562 (which avoid length expansion in many cases).
2565 *) Add a function EC_GROUP_check_discriminant() (defined via
2566 EC_METHOD) that verifies that the curve discriminant is non-zero.
2568 Add a function EC_GROUP_check() that makes some sanity tests
2569 on a EC_GROUP, its generator and order. This includes
2570 EC_GROUP_check_discriminant().
2571 [Nils Larsch <nla@trustcenter.de>]
2573 *) Add ECDSA in new directory crypto/ecdsa/.
2575 Add applications 'openssl ecparam' and 'openssl ecdsa'
2576 (these are based on 'openssl dsaparam' and 'openssl dsa').
2578 ECDSA support is also included in various other files across the
2579 library. Most notably,
2580 - 'openssl req' now has a '-newkey ecdsa:file' option;
2581 - EVP_PKCS82PKEY (crypto/evp/evp_pkey.c) now can handle ECDSA;
2582 - X509_PUBKEY_get (crypto/asn1/x_pubkey.c) and
2583 d2i_PublicKey (crypto/asn1/d2i_pu.c) have been modified to make
2584 them suitable for ECDSA where domain parameters must be
2585 extracted before the specific public key;
2586 - ECDSA engine support has been added.
2587 [Nils Larsch <nla@trustcenter.de>]
2589 *) Include some named elliptic curves, and add OIDs from X9.62,
2590 SECG, and WAP/WTLS. Each curve can be obtained from the new
2592 EC_GROUP_new_by_curve_name(),
2593 and the list of available named curves can be obtained with
2594 EC_get_builtin_curves().
2595 Also add a 'curve_name' member to EC_GROUP objects, which can be
2597 EC_GROUP_set_curve_name()
2598 EC_GROUP_get_curve_name()
2599 [Nils Larsch <larsch@trustcenter.de, Bodo Moeller]
2601 *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
2602 was actually never needed) and in BN_mul(). The removal in BN_mul()
2603 required a small change in bn_mul_part_recursive() and the addition
2604 of the functions bn_cmp_part_words(), bn_sub_part_words() and
2605 bn_add_part_words(), which do the same thing as bn_cmp_words(),
2606 bn_sub_words() and bn_add_words() except they take arrays with
2610 Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
2612 *) Cleanse PEM buffers before freeing them since they may contain
2614 [Benjamin Bennett <ben@psc.edu>]
2616 *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
2617 a ciphersuite string such as "DEFAULT:RSA" cannot enable
2618 authentication-only ciphersuites.
2621 *) Since AES128 and AES256 share a single mask bit in the logic of
2622 ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
2623 kludge to work properly if AES128 is available and AES256 isn't.
2626 *) Expand security boundary to match 1.1.1 module.
2629 *) Remove redundant features: hash file source, editing of test vectors
2630 modify fipsld to use external fips_premain.c signature.
2633 *) New perl script mkfipsscr.pl to create shell scripts or batch files to
2634 run algorithm test programs.
2637 *) Make algorithm test programs more tolerant of whitespace.
2640 *) Have SSL/TLS server implementation tolerate "mismatched" record
2641 protocol version while receiving ClientHello even if the
2642 ClientHello is fragmented. (The server can't insist on the
2643 particular protocol version it has chosen before the ServerHello
2644 message has informed the client about his choice.)
2647 *) Load error codes if they are not already present instead of using a
2648 static variable. This allows them to be cleanly unloaded and reloaded.
2651 Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
2653 *) Introduce limits to prevent malicious keys being able to
2654 cause a denial of service. (CVE-2006-2940)
2655 [Steve Henson, Bodo Moeller]
2657 *) Fix ASN.1 parsing of certain invalid structures that can result
2658 in a denial of service. (CVE-2006-2937) [Steve Henson]
2660 *) Fix buffer overflow in SSL_get_shared_ciphers() function.
2661 (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
2663 *) Fix SSL client code which could crash if connecting to a
2664 malicious SSLv2 server. (CVE-2006-4343)
2665 [Tavis Ormandy and Will Drewry, Google Security Team]
2667 *) Change ciphersuite string processing so that an explicit
2668 ciphersuite selects this one ciphersuite (so that "AES256-SHA"
2669 will no longer include "AES128-SHA"), and any other similar
2670 ciphersuite (same bitmap) from *other* protocol versions (so that
2671 "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
2672 SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
2673 changes from 0.9.8b and 0.9.8d.
2676 Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
2678 *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
2679 (CVE-2006-4339) [Ben Laurie and Google Security Team]
2681 *) Change the Unix randomness entropy gathering to use poll() when
2682 possible instead of select(), since the latter has some
2683 undesirable limitations.
2684 [Darryl Miles via Richard Levitte and Bodo Moeller]
2686 *) Disable rogue ciphersuites:
2688 - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
2689 - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
2690 - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
2692 The latter two were purportedly from
2693 draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
2696 Also deactive the remaining ciphersuites from
2697 draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
2698 unofficial, and the ID has long expired.
2701 *) Fix RSA blinding Heisenbug (problems sometimes occured on
2702 dual-core machines) and other potential thread-safety issues.
2705 Changes between 0.9.7i and 0.9.7j [04 May 2006]
2707 *) Adapt fipsld and the build system to link against the validated FIPS
2708 module in FIPS mode.
2711 *) Fixes for VC++ 2005 build under Windows.
2714 *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
2715 from a Windows bash shell such as MSYS. It is autodetected from the
2716 "config" script when run from a VC++ environment. Modify standard VC++
2717 build to use fipscanister.o from the GNU make build.
2720 Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
2722 *) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
2723 The value now differs depending on if you build for FIPS or not.
2724 BEWARE! A program linked with a shared FIPSed libcrypto can't be
2725 safely run with a non-FIPSed libcrypto, as it may crash because of
2726 the difference induced by this change.
2729 Changes between 0.9.7g and 0.9.7h [11 Oct 2005]
2731 *) Remove the functionality of SSL_OP_MSIE_SSLV2_RSA_PADDING
2732 (part of SSL_OP_ALL). This option used to disable the
2733 countermeasure against man-in-the-middle protocol-version
2734 rollback in the SSL 2.0 server implementation, which is a bad
2735 idea. (CVE-2005-2969)
2737 [Bodo Moeller; problem pointed out by Yutaka Oiwa (Research Center
2738 for Information Security, National Institute of Advanced Industrial
2739 Science and Technology [AIST], Japan)]
2741 *) Minimal support for X9.31 signatures and PSS padding modes. This is
2742 mainly for FIPS compliance and not fully integrated at this stage.
2745 *) For DSA signing, unless DSA_FLAG_NO_EXP_CONSTTIME is set, perform
2746 the exponentiation using a fixed-length exponent. (Otherwise,
2747 the information leaked through timing could expose the secret key
2748 after many signatures; cf. Bleichenbacher's attack on DSA with
2752 *) Make a new fixed-window mod_exp implementation the default for
2753 RSA, DSA, and DH private-key operations so that the sequence of
2754 squares and multiplies and the memory access pattern are
2755 independent of the particular secret key. This will mitigate
2756 cache-timing and potential related attacks.
2758 BN_mod_exp_mont_consttime() is the new exponentiation implementation,
2759 and this is automatically used by BN_mod_exp_mont() if the new flag
2760 BN_FLG_EXP_CONSTTIME is set for the exponent. RSA, DSA, and DH
2761 will use this BN flag for private exponents unless the flag
2762 RSA_FLAG_NO_EXP_CONSTTIME, DSA_FLAG_NO_EXP_CONSTTIME, or
2763 DH_FLAG_NO_EXP_CONSTTIME, respectively, is set.
2765 [Matthew D Wood (Intel Corp), with some changes by Bodo Moeller]
2767 *) Change the client implementation for SSLv23_method() and
2768 SSLv23_client_method() so that is uses the SSL 3.0/TLS 1.0
2769 Client Hello message format if the SSL_OP_NO_SSLv2 option is set.
2770 (Previously, the SSL 2.0 backwards compatible Client Hello
2771 message format would be used even with SSL_OP_NO_SSLv2.)
2774 *) Add support for smime-type MIME parameter in S/MIME messages which some
2778 *) New function BN_MONT_CTX_set_locked() to set montgomery parameters in
2779 a threadsafe manner. Modify rsa code to use new function and add calls
2780 to dsa and dh code (which had race conditions before).
2783 *) Include the fixed error library code in the C error file definitions
2784 instead of fixing them up at runtime. This keeps the error code
2785 structures constant.
2788 Changes between 0.9.7f and 0.9.7g [11 Apr 2005]
2790 [NB: OpenSSL 0.9.7h and later 0.9.7 patch levels were released after
2793 *) Fixes for newer kerberos headers. NB: the casts are needed because
2794 the 'length' field is signed on one version and unsigned on another
2795 with no (?) obvious way to tell the difference, without these VC++
2796 complains. Also the "definition" of FAR (blank) is no longer included
2797 nor is the error ENOMEM. KRB5_PRIVATE has to be set to 1 to pick up
2798 some needed definitions.
2801 *) Undo Cygwin change.
2804 *) Added support for proxy certificates according to RFC 3820.
2805 Because they may be a security thread to unaware applications,
2806 they must be explicitely allowed in run-time. See
2807 docs/HOWTO/proxy_certificates.txt for further information.
2810 Changes between 0.9.7e and 0.9.7f [22 Mar 2005]
2812 *) Use (SSL_RANDOM_VALUE - 4) bytes of pseudo random data when generating
2813 server and client random values. Previously
2814 (SSL_RANDOM_VALUE - sizeof(time_t)) would be used which would result in
2815 less random data when sizeof(time_t) > 4 (some 64 bit platforms).
2817 This change has negligible security impact because:
2819 1. Server and client random values still have 24 bytes of pseudo random
2822 2. Server and client random values are sent in the clear in the initial
2825 3. The master secret is derived using the premaster secret (48 bytes in
2826 size for static RSA ciphersuites) as well as client server and random
2829 The OpenSSL team would like to thank the UK NISCC for bringing this issue
2832 [Stephen Henson, reported by UK NISCC]
2834 *) Use Windows randomness collection on Cygwin.
2837 *) Fix hang in EGD/PRNGD query when communication socket is closed
2838 prematurely by EGD/PRNGD.
2839 [Darren Tucker <dtucker@zip.com.au> via Lutz Jänicke, resolves #1014]
2841 *) Prompt for pass phrases when appropriate for PKCS12 input format.
2844 *) Back-port of selected performance improvements from development
2845 branch, as well as improved support for PowerPC platforms.
2848 *) Add lots of checks for memory allocation failure, error codes to indicate
2849 failure and freeing up memory if a failure occurs.
2850 [Nauticus Networks SSL Team <openssl@nauticusnet.com>, Steve Henson]
2852 *) Add new -passin argument to dgst.
2855 *) Perform some character comparisons of different types in X509_NAME_cmp:
2856 this is needed for some certificates that reencode DNs into UTF8Strings
2857 (in violation of RFC3280) and can't or wont issue name rollover
2861 *) Make an explicit check during certificate validation to see that
2862 the CA setting in each certificate on the chain is correct. As a
2863 side effect always do the following basic checks on extensions,
2864 not just when there's an associated purpose to the check:
2866 - if there is an unhandled critical extension (unless the user
2867 has chosen to ignore this fault)
2868 - if the path length has been exceeded (if one is set at all)
2869 - that certain extensions fit the associated purpose (if one has
2873 Changes between 0.9.7d and 0.9.7e [25 Oct 2004]
2875 *) Avoid a race condition when CRLs are checked in a multi threaded
2876 environment. This would happen due to the reordering of the revoked
2877 entries during signature checking and serial number lookup. Now the
2878 encoding is cached and the serial number sort performed under a lock.
2879 Add new STACK function sk_is_sorted().
2882 *) Add Delta CRL to the extension code.
2885 *) Various fixes to s3_pkt.c so alerts are sent properly.
2886 [David Holmes <d.holmes@f5.com>]
2888 *) Reduce the chances of duplicate issuer name and serial numbers (in
2889 violation of RFC3280) using the OpenSSL certificate creation utilities.
2890 This is done by creating a random 64 bit value for the initial serial
2891 number when a serial number file is created or when a self signed
2892 certificate is created using 'openssl req -x509'. The initial serial
2893 number file is created using 'openssl x509 -next_serial' in CA.pl
2894 rather than being initialized to 1.
2897 Changes between 0.9.7c and 0.9.7d [17 Mar 2004]
2899 *) Fix null-pointer assignment in do_change_cipher_spec() revealed
2900 by using the Codenomicon TLS Test Tool (CVE-2004-0079)
2901 [Joe Orton, Steve Henson]
2903 *) Fix flaw in SSL/TLS handshaking when using Kerberos ciphersuites
2905 [Joe Orton, Steve Henson]
2907 *) Make it possible to have multiple active certificates with the same
2908 subject in the CA index file. This is done only if the keyword
2909 'unique_subject' is set to 'no' in the main CA section (default
2910 if 'CA_default') of the configuration file. The value is saved
2911 with the database itself in a separate index attribute file,
2912 named like the index file with '.attr' appended to the name.
2915 *) X509 verify fixes. Disable broken certificate workarounds when
2916 X509_V_FLAGS_X509_STRICT is set. Check CRL issuer has cRLSign set if
2917 keyUsage extension present. Don't accept CRLs with unhandled critical
2918 extensions: since verify currently doesn't process CRL extensions this
2919 rejects a CRL with *any* critical extensions. Add new verify error codes
2923 *) When creating an OCSP nonce use an OCTET STRING inside the extnValue.
2924 A clarification of RFC2560 will require the use of OCTET STRINGs and
2925 some implementations cannot handle the current raw format. Since OpenSSL
2926 copies and compares OCSP nonces as opaque blobs without any attempt at
2927 parsing them this should not create any compatibility issues.
2930 *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when
2931 calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without
2932 this HMAC (and other) operations are several times slower than OpenSSL
2936 *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().
2937 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
2939 *) Use the correct content when signing type "other".
2942 Changes between 0.9.7b and 0.9.7c [30 Sep 2003]
2944 *) Fix various bugs revealed by running the NISCC test suite:
2946 Stop out of bounds reads in the ASN1 code when presented with
2947 invalid tags (CVE-2003-0543 and CVE-2003-0544).
2949 Free up ASN1_TYPE correctly if ANY type is invalid (CVE-2003-0545).
2951 If verify callback ignores invalid public key errors don't try to check
2952 certificate signature with the NULL public key.
2956 *) New -ignore_err option in ocsp application to stop the server
2957 exiting on the first error in a request.
2960 *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
2961 if the server requested one: as stated in TLS 1.0 and SSL 3.0
2965 *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
2966 extra data after the compression methods not only for TLS 1.0
2967 but also for SSL 3.0 (as required by the specification).
2968 [Bodo Moeller; problem pointed out by Matthias Loepfe]
2970 *) Change X509_certificate_type() to mark the key as exported/exportable
2971 when it's 512 *bits* long, not 512 bytes.
2974 *) Change AES_cbc_encrypt() so it outputs exact multiple of
2975 blocks during encryption.
2978 *) Various fixes to base64 BIO and non blocking I/O. On write
2979 flushes were not handled properly if the BIO retried. On read
2980 data was not being buffered properly and had various logic bugs.
2981 This also affects blocking I/O when the data being decoded is a
2985 *) Various S/MIME bugfixes and compatibility changes:
2986 output correct application/pkcs7 MIME type if
2987 PKCS7_NOOLDMIMETYPE is set. Tolerate some broken signatures.
2988 Output CR+LF for EOL if PKCS7_CRLFEOL is set (this makes opening
2989 of files as .eml work). Correctly handle very long lines in MIME
2993 Changes between 0.9.7a and 0.9.7b [10 Apr 2003]
2995 *) Countermeasure against the Klima-Pokorny-Rosa extension of
2996 Bleichbacher's attack on PKCS #1 v1.5 padding: treat
2997 a protocol version number mismatch like a decryption error
2998 in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
3001 *) Turn on RSA blinding by default in the default implementation
3002 to avoid a timing attack. Applications that don't want it can call
3003 RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
3004 They would be ill-advised to do so in most cases.
3005 [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]
3007 *) Change RSA blinding code so that it works when the PRNG is not
3008 seeded (in this case, the secret RSA exponent is abused as
3009 an unpredictable seed -- if it is not unpredictable, there
3010 is no point in blinding anyway). Make RSA blinding thread-safe
3011 by remembering the creator's thread ID in rsa->blinding and
3012 having all other threads use local one-time blinding factors
3013 (this requires more computation than sharing rsa->blinding, but
3014 avoids excessive locking; and if an RSA object is not shared
3015 between threads, blinding will still be very fast).
3018 *) Fixed a typo bug that would cause ENGINE_set_default() to set an
3019 ENGINE as defaults for all supported algorithms irrespective of
3020 the 'flags' parameter. 'flags' is now honoured, so applications
3021 should make sure they are passing it correctly.
3024 *) Target "mingw" now allows native Windows code to be generated in
3025 the Cygwin environment as well as with the MinGW compiler.
3028 Changes between 0.9.7 and 0.9.7a [19 Feb 2003]
3030 *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
3031 via timing by performing a MAC computation even if incorrrect
3032 block cipher padding has been found. This is a countermeasure
3033 against active attacks where the attacker has to distinguish
3034 between bad padding and a MAC verification error. (CVE-2003-0078)
3036 [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
3037 Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
3038 Martin Vuagnoux (EPFL, Ilion)]
3040 *) Make the no-err option work as intended. The intention with no-err
3041 is not to have the whole error stack handling routines removed from
3042 libcrypto, it's only intended to remove all the function name and
3043 reason texts, thereby removing some of the footprint that may not
3044 be interesting if those errors aren't displayed anyway.
3046 NOTE: it's still possible for any application or module to have it's
3047 own set of error texts inserted. The routines are there, just not
3048 used by default when no-err is given.
3051 *) Add support for FreeBSD on IA64.
3052 [dirk.meyer@dinoex.sub.org via Richard Levitte, resolves #454]
3054 *) Adjust DES_cbc_cksum() so it returns the same value as the MIT
3055 Kerberos function mit_des_cbc_cksum(). Before this change,
3056 the value returned by DES_cbc_cksum() was like the one from
3057 mit_des_cbc_cksum(), except the bytes were swapped.
3058 [Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
3060 *) Allow an application to disable the automatic SSL chain building.
3061 Before this a rather primitive chain build was always performed in
3062 ssl3_output_cert_chain(): an application had no way to send the
3063 correct chain if the automatic operation produced an incorrect result.
3065 Now the chain builder is disabled if either:
3067 1. Extra certificates are added via SSL_CTX_add_extra_chain_cert().
3069 2. The mode flag SSL_MODE_NO_AUTO_CHAIN is set.
3071 The reasoning behind this is that an application would not want the
3072 auto chain building to take place if extra chain certificates are
3073 present and it might also want a means of sending no additional
3074 certificates (for example the chain has two certificates and the
3078 *) Add the possibility to build without the ENGINE framework.
3079 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3081 *) Under Win32 gmtime() can return NULL: check return value in
3082 OPENSSL_gmtime(). Add error code for case where gmtime() fails.
3085 *) DSA routines: under certain error conditions uninitialized BN objects
3086 could be freed. Solution: make sure initialization is performed early
3087 enough. (Reported and fix supplied by Ivan D Nestlerode <nestler@MIT.EDU>,
3088 Nils Larsch <nla@trustcenter.de> via PR#459)
3091 *) Another fix for SSLv2 session ID handling: the session ID was incorrectly
3092 checked on reconnect on the client side, therefore session resumption
3093 could still fail with a "ssl session id is different" error. This
3094 behaviour is masked when SSL_OP_ALL is used due to
3095 SSL_OP_MICROSOFT_SESS_ID_BUG being set.
3096 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3097 followup to PR #377.
3100 *) IA-32 assembler support enhancements: unified ELF targets, support
3101 for SCO/Caldera platforms, fix for Cygwin shared build.
3104 *) Add support for FreeBSD on sparc64. As a consequence, support for
3105 FreeBSD on non-x86 processors is separate from x86 processors on
3106 the config script, much like the NetBSD support.
3107 [Richard Levitte & Kris Kennaway <kris@obsecurity.org>]
3109 Changes between 0.9.6h and 0.9.7 [31 Dec 2002]
3111 [NB: OpenSSL 0.9.6i and later 0.9.6 patch levels were released after
3114 *) Fix session ID handling in SSLv2 client code: the SERVER FINISHED
3115 code (06) was taken as the first octet of the session ID and the last
3116 octet was ignored consequently. As a result SSLv2 client side session
3117 caching could not have worked due to the session ID mismatch between
3119 Behaviour observed by Crispin Flowerday <crispin@flowerday.cx> as
3123 *) Change the declaration of needed Kerberos libraries to use EX_LIBS
3124 instead of the special (and badly supported) LIBKRB5. LIBKRB5 is
3128 *) The hw_ncipher.c engine requires dynamic locks. Unfortunately, it
3129 seems that in spite of existing for more than a year, many application
3130 author have done nothing to provide the necessary callbacks, which
3131 means that this particular engine will not work properly anywhere.
3132 This is a very unfortunate situation which forces us, in the name
3133 of usability, to give the hw_ncipher.c a static lock, which is part
3135 NOTE: This is for the 0.9.7 series ONLY. This hack will never
3136 appear in 0.9.8 or later. We EXPECT application authors to have
3137 dealt properly with this when 0.9.8 is released (unless we actually
3138 make such changes in the libcrypto locking code that changes will
3139 have to be made anyway).
3142 *) In asn1_d2i_read_bio() repeatedly call BIO_read() until all content
3143 octets have been read, EOF or an error occurs. Without this change
3144 some truncated ASN1 structures will not produce an error.
3147 *) Disable Heimdal support, since it hasn't been fully implemented.
3148 Still give the possibility to force the use of Heimdal, but with
3149 warnings and a request that patches get sent to openssl-dev.
3152 *) Add the VC-CE target, introduce the WINCE sysname, and add
3153 INSTALL.WCE and appropriate conditionals to make it build.
3154 [Steven Reddie <smr@essemer.com.au> via Richard Levitte]
3156 *) Change the DLL names for Cygwin to cygcrypto-x.y.z.dll and
3157 cygssl-x.y.z.dll, where x, y and z are the major, minor and
3158 edit numbers of the version.
3159 [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
3161 *) Introduce safe string copy and catenation functions
3162 (BUF_strlcpy() and BUF_strlcat()).
3163 [Ben Laurie (CHATS) and Richard Levitte]
3165 *) Avoid using fixed-size buffers for one-line DNs.
3166 [Ben Laurie (CHATS)]
3168 *) Add BUF_MEM_grow_clean() to avoid information leakage when
3169 resizing buffers containing secrets, and use where appropriate.
3170 [Ben Laurie (CHATS)]
3172 *) Avoid using fixed size buffers for configuration file location.
3173 [Ben Laurie (CHATS)]
3175 *) Avoid filename truncation for various CA files.
3176 [Ben Laurie (CHATS)]
3178 *) Use sizeof in preference to magic numbers.
3179 [Ben Laurie (CHATS)]
3181 *) Avoid filename truncation in cert requests.
3182 [Ben Laurie (CHATS)]
3184 *) Add assertions to check for (supposedly impossible) buffer
3186 [Ben Laurie (CHATS)]
3188 *) Don't cache truncated DNS entries in the local cache (this could
3189 potentially lead to a spoofing attack).
3190 [Ben Laurie (CHATS)]
3192 *) Fix various buffers to be large enough for hex/decimal
3193 representations in a platform independent manner.
3194 [Ben Laurie (CHATS)]
3196 *) Add CRYPTO_realloc_clean() to avoid information leakage when
3197 resizing buffers containing secrets, and use where appropriate.
3198 [Ben Laurie (CHATS)]
3200 *) Add BIO_indent() to avoid much slightly worrying code to do
3202 [Ben Laurie (CHATS)]
3204 *) Convert sprintf()/BIO_puts() to BIO_printf().
3205 [Ben Laurie (CHATS)]
3207 *) buffer_gets() could terminate with the buffer only half
3209 [Ben Laurie (CHATS)]
3211 *) Add assertions to prevent user-supplied crypto functions from
3212 overflowing internal buffers by having large block sizes, etc.
3213 [Ben Laurie (CHATS)]
3215 *) New OPENSSL_assert() macro (similar to assert(), but enabled
3217 [Ben Laurie (CHATS)]
3219 *) Eliminate unused copy of key in RC4.
3220 [Ben Laurie (CHATS)]
3222 *) Eliminate unused and incorrectly sized buffers for IV in pem.h.
3223 [Ben Laurie (CHATS)]
3225 *) Fix off-by-one error in EGD path.
3226 [Ben Laurie (CHATS)]
3228 *) If RANDFILE path is too long, ignore instead of truncating.
3229 [Ben Laurie (CHATS)]
3231 *) Eliminate unused and incorrectly sized X.509 structure
3233 [Ben Laurie (CHATS)]
3235 *) Eliminate unused and dangerous function knumber().
3236 [Ben Laurie (CHATS)]
3238 *) Eliminate unused and dangerous structure, KSSL_ERR.
3239 [Ben Laurie (CHATS)]
3241 *) Protect against overlong session ID context length in an encoded
3242 session object. Since these are local, this does not appear to be
3244 [Ben Laurie (CHATS)]
3246 *) Change from security patch (see 0.9.6e below) that did not affect
3247 the 0.9.6 release series:
3249 Remote buffer overflow in SSL3 protocol - an attacker could
3250 supply an oversized master key in Kerberos-enabled versions.
3252 [Ben Laurie (CHATS)]
3254 *) Change the SSL kerb5 codes to match RFC 2712.
3257 *) Make -nameopt work fully for req and add -reqopt switch.
3258 [Michael Bell <michael.bell@rz.hu-berlin.de>, Steve Henson]
3260 *) The "block size" for block ciphers in CFB and OFB mode should be 1.
3261 [Steve Henson, reported by Yngve Nysaeter Pettersen <yngve@opera.com>]
3263 *) Make sure tests can be performed even if the corresponding algorithms
3264 have been removed entirely. This was also the last step to make
3265 OpenSSL compilable with DJGPP under all reasonable conditions.
3266 [Richard Levitte, Doug Kaufman <dkaufman@rahul.net>]
3268 *) Add cipher selection rules COMPLEMENTOFALL and COMPLEMENTOFDEFAULT
3269 to allow version independent disabling of normally unselected ciphers,
3270 which may be activated as a side-effect of selecting a single cipher.
3272 (E.g., cipher list string "RSA" enables ciphersuites that are left
3273 out of "ALL" because they do not provide symmetric encryption.
3274 "RSA:!COMPLEMEMENTOFALL" avoids these unsafe ciphersuites.)
3275 [Lutz Jaenicke, Bodo Moeller]
3277 *) Add appropriate support for separate platform-dependent build
3278 directories. The recommended way to make a platform-dependent
3279 build directory is the following (tested on Linux), maybe with
3282 # Place yourself outside of the OpenSSL source tree. In
3283 # this example, the environment variable OPENSSL_SOURCE
3284 # is assumed to contain the absolute OpenSSL source directory.
3285 mkdir -p objtree/"`uname -s`-`uname -r`-`uname -m`"
3286 cd objtree/"`uname -s`-`uname -r`-`uname -m`"
3287 (cd $OPENSSL_SOURCE; find . -type f) | while read F; do
3288 mkdir -p `dirname $F`
3289 ln -s $OPENSSL_SOURCE/$F $F
3292 To be absolutely sure not to disturb the source tree, a "make clean"
3293 is a good thing. If it isn't successfull, don't worry about it,
3294 it probably means the source directory is very clean.
3297 *) Make sure any ENGINE control commands make local copies of string
3298 pointers passed to them whenever necessary. Otherwise it is possible
3299 the caller may have overwritten (or deallocated) the original string
3300 data when a later ENGINE operation tries to use the stored values.
3301 [Götz Babin-Ebell <babinebell@trustcenter.de>]
3303 *) Improve diagnostics in file reading and command-line digests.
3304 [Ben Laurie aided and abetted by Solar Designer <solar@openwall.com>]
3306 *) Add AES modes CFB and OFB to the object database. Correct an
3307 error in AES-CFB decryption.
3310 *) Remove most calls to EVP_CIPHER_CTX_cleanup() in evp_enc.c, this
3311 allows existing EVP_CIPHER_CTX structures to be reused after
3312 calling EVP_*Final(). This behaviour is used by encryption
3313 BIOs and some applications. This has the side effect that
3314 applications must explicitly clean up cipher contexts with
3315 EVP_CIPHER_CTX_cleanup() or they will leak memory.
3318 *) Check the values of dna and dnb in bn_mul_recursive before calling
3319 bn_mul_comba (a non zero value means the a or b arrays do not contain
3320 n2 elements) and fallback to bn_mul_normal if either is not zero.
3323 *) Fix escaping of non-ASCII characters when using the -subj option
3324 of the "openssl req" command line tool. (Robert Joop <joop@fokus.gmd.de>)
3327 *) Make object definitions compliant to LDAP (RFC2256): SN is the short
3328 form for "surname", serialNumber has no short form.
3329 Use "mail" as the short name for "rfc822Mailbox" according to RFC2798;
3330 therefore remove "mail" short name for "internet 7".
3331 The OID for unique identifiers in X509 certificates is
3332 x500UniqueIdentifier, not uniqueIdentifier.
3333 Some more OID additions. (Michael Bell <michael.bell@rz.hu-berlin.de>)
3336 *) Add an "init" command to the ENGINE config module and auto initialize
3337 ENGINEs. Without any "init" command the ENGINE will be initialized
3338 after all ctrl commands have been executed on it. If init=1 the
3339 ENGINE is initailized at that point (ctrls before that point are run
3340 on the uninitialized ENGINE and after on the initialized one). If
3341 init=0 then the ENGINE will not be iniatialized at all.
3344 *) Fix the 'app_verify_callback' interface so that the user-defined
3345 argument is actually passed to the callback: In the
3346 SSL_CTX_set_cert_verify_callback() prototype, the callback
3347 declaration has been changed from
3350 int (*cb)(X509_STORE_CTX *,void *);
3351 in ssl_verify_cert_chain (ssl/ssl_cert.c), the call
3352 i=s->ctx->app_verify_callback(&ctx)
3353 has been changed into
3354 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg).
3356 To update applications using SSL_CTX_set_cert_verify_callback(),
3357 a dummy argument can be added to their callback functions.
3358 [D. K. Smetters <smetters@parc.xerox.com>]
3360 *) Added the '4758cca' ENGINE to support IBM 4758 cards.
3361 [Maurice Gittens <maurice@gittens.nl>, touchups by Geoff Thorpe]
3363 *) Add and OPENSSL_LOAD_CONF define which will cause
3364 OpenSSL_add_all_algorithms() to load the openssl.cnf config file.
3365 This allows older applications to transparently support certain
3366 OpenSSL features: such as crypto acceleration and dynamic ENGINE loading.
3367 Two new functions OPENSSL_add_all_algorithms_noconf() which will never
3368 load the config file and OPENSSL_add_all_algorithms_conf() which will
3369 always load it have also been added.
3372 *) Add the OFB, CFB and CTR (all with 128 bit feedback) to AES.
3373 Adjust NIDs and EVP layer.
3374 [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]
3376 *) Config modules support in openssl utility.
3378 Most commands now load modules from the config file,
3379 though in a few (such as version) this isn't done
3380 because it couldn't be used for anything.
3382 In the case of ca and req the config file used is
3383 the same as the utility itself: that is the -config
3384 command line option can be used to specify an
3388 *) Move default behaviour from OPENSSL_config(). If appname is NULL
3389 use "openssl_conf" if filename is NULL use default openssl config file.
3392 *) Add an argument to OPENSSL_config() to allow the use of an alternative
3393 config section name. Add a new flag to tolerate a missing config file
3394 and move code to CONF_modules_load_file().
3397 *) Support for crypto accelerator cards from Accelerated Encryption
3398 Processing, www.aep.ie. (Use engine 'aep')
3399 The support was copied from 0.9.6c [engine] and adapted/corrected
3400 to work with the new engine framework.
3401 [AEP Inc. and Richard Levitte]
3403 *) Support for SureWare crypto accelerator cards from Baltimore
3404 Technologies. (Use engine 'sureware')
3405 The support was copied from 0.9.6c [engine] and adapted
3406 to work with the new engine framework.
3409 *) Have the CHIL engine fork-safe (as defined by nCipher) and actually
3410 make the newer ENGINE framework commands for the CHIL engine work.
3411 [Toomas Kiisk <vix@cyber.ee> and Richard Levitte]
3413 *) Make it possible to produce shared libraries on ReliantUNIX.
3414 [Robert Dahlem <Robert.Dahlem@ffm2.siemens.de> via Richard Levitte]
3416 *) Add the configuration target debug-linux-ppro.
3417 Make 'openssl rsa' use the general key loading routines
3418 implemented in apps.c, and make those routines able to
3419 handle the key format FORMAT_NETSCAPE and the variant
3421 [Toomas Kiisk <vix@cyber.ee> via Richard Levitte]
3423 *) Fix a crashbug and a logic bug in hwcrhk_load_pubkey().
3424 [Toomas Kiisk <vix@cyber.ee> via Richard Levitte]
3426 *) Add -keyform to rsautl, and document -engine.
3427 [Richard Levitte, inspired by Toomas Kiisk <vix@cyber.ee>]
3429 *) Change BIO_new_file (crypto/bio/bss_file.c) to use new
3430 BIO_R_NO_SUCH_FILE error code rather than the generic
3431 ERR_R_SYS_LIB error code if fopen() fails with ENOENT.
3434 *) Add new functions
3436 ERR_peek_last_error_line
3437 ERR_peek_last_error_line_data.
3438 These are similar to
3441 ERR_peek_error_line_data,
3442 but report on the latest error recorded rather than the first one
3443 still in the error queue.
3444 [Ben Laurie, Bodo Moeller]
3446 *) default_algorithms option in ENGINE config module. This allows things
3448 default_algorithms = ALL
3449 default_algorithms = RSA, DSA, RAND, CIPHERS, DIGESTS
3452 *) Prelminary ENGINE config module.
3455 *) New experimental application configuration code.
3458 *) Change the AES code to follow the same name structure as all other
3459 symmetric ciphers, and behave the same way. Move everything to
3460 the directory crypto/aes, thereby obsoleting crypto/rijndael.
3461 [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]
3463 *) SECURITY: remove unsafe setjmp/signal interaction from ui_openssl.c.
3464 [Ben Laurie and Theo de Raadt]
3466 *) Add option to output public keys in req command.
3467 [Massimiliano Pala madwolf@openca.org]
3469 *) Use wNAFs in EC_POINTs_mul() for improved efficiency
3470 (up to about 10% better than before for P-192 and P-224).
3473 *) New functions/macros
3475 SSL_CTX_set_msg_callback(ctx, cb)
3476 SSL_CTX_set_msg_callback_arg(ctx, arg)
3477 SSL_set_msg_callback(ssl, cb)
3478 SSL_set_msg_callback_arg(ssl, arg)
3480 to request calling a callback function
3482 void cb(int write_p, int version, int content_type,
3483 const void *buf, size_t len, SSL *ssl, void *arg)
3485 whenever a protocol message has been completely received
3486 (write_p == 0) or sent (write_p == 1). Here 'version' is the
3487 protocol version according to which the SSL library interprets
3488 the current protocol message (SSL2_VERSION, SSL3_VERSION, or
3489 TLS1_VERSION). 'content_type' is 0 in the case of SSL 2.0, or
3490 the content type as defined in the SSL 3.0/TLS 1.0 protocol
3491 specification (change_cipher_spec(20), alert(21), handshake(22)).
3492 'buf' and 'len' point to the actual message, 'ssl' to the
3493 SSL object, and 'arg' is the application-defined value set by
3494 SSL[_CTX]_set_msg_callback_arg().
3496 'openssl s_client' and 'openssl s_server' have new '-msg' options
3497 to enable a callback that displays all protocol messages.
3500 *) Change the shared library support so shared libraries are built as
3501 soon as the corresponding static library is finished, and thereby get
3502 openssl and the test programs linked against the shared library.
3503 This still only happens when the keyword "shard" has been given to
3504 the configuration scripts.
3506 NOTE: shared library support is still an experimental thing, and
3507 backward binary compatibility is still not guaranteed.
3508 ["Maciej W. Rozycki" <macro@ds2.pg.gda.pl> and Richard Levitte]
3510 *) Add support for Subject Information Access extension.
3511 [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]
3513 *) Make BUF_MEM_grow() behaviour more consistent: Initialise to zero
3514 additional bytes when new memory had to be allocated, not just
3515 when reusing an existing buffer.
3518 *) New command line and configuration option 'utf8' for the req command.
3519 This allows field values to be specified as UTF8 strings.
3522 *) Add -multi and -mr options to "openssl speed" - giving multiple parallel
3523 runs for the former and machine-readable output for the latter.
3526 *) Add '-noemailDN' option to 'openssl ca'. This prevents inclusion
3527 of the e-mail address in the DN (i.e., it will go into a certificate
3528 extension only). The new configuration file option 'email_in_dn = no'
3529 has the same effect.
3530 [Massimiliano Pala madwolf@openca.org]
3532 *) Change all functions with names starting with des_ to be starting
3533 with DES_ instead. Add wrappers that are compatible with libdes,
3534 but are named _ossl_old_des_*. Finally, add macros that map the
3535 des_* symbols to the corresponding _ossl_old_des_* if libdes
3536 compatibility is desired. If OpenSSL 0.9.6c compatibility is
3537 desired, the des_* symbols will be mapped to DES_*, with one
3540 Since we provide two compatibility mappings, the user needs to
3541 define the macro OPENSSL_DES_LIBDES_COMPATIBILITY if libdes
3542 compatibility is desired. The default (i.e., when that macro
3543 isn't defined) is OpenSSL 0.9.6c compatibility.
3545 There are also macros that enable and disable the support of old
3546 des functions altogether. Those are OPENSSL_ENABLE_OLD_DES_SUPPORT
3547 and OPENSSL_DISABLE_OLD_DES_SUPPORT. If none or both of those
3548 are defined, the default will apply: to support the old des routines.
3550 In either case, one must include openssl/des.h to get the correct
3551 definitions. Do not try to just include openssl/des_old.h, that
3554 NOTE: This is a major break of an old API into a new one. Software
3555 authors are encouraged to switch to the DES_ style functions. Some
3556 time in the future, des_old.h and the libdes compatibility functions
3557 will be disable (i.e. OPENSSL_DISABLE_OLD_DES_SUPPORT will be the
3558 default), and then completely removed.
3561 *) Test for certificates which contain unsupported critical extensions.
3562 If such a certificate is found during a verify operation it is
3563 rejected by default: this behaviour can be overridden by either
3564 handling the new error X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION or
3565 by setting the verify flag X509_V_FLAG_IGNORE_CRITICAL. A new function
3566 X509_supported_extension() has also been added which returns 1 if a
3567 particular extension is supported.
3570 *) Modify the behaviour of EVP cipher functions in similar way to digests
3571 to retain compatibility with existing code.
3574 *) Modify the behaviour of EVP_DigestInit() and EVP_DigestFinal() to retain
3575 compatibility with existing code. In particular the 'ctx' parameter does
3576 not have to be to be initialized before the call to EVP_DigestInit() and
3577 it is tidied up after a call to EVP_DigestFinal(). New function
3578 EVP_DigestFinal_ex() which does not tidy up the ctx. Similarly function
3579 EVP_MD_CTX_copy() changed to not require the destination to be
3580 initialized valid and new function EVP_MD_CTX_copy_ex() added which
3581 requires the destination to be valid.
3583 Modify all the OpenSSL digest calls to use EVP_DigestInit_ex(),
3584 EVP_DigestFinal_ex() and EVP_MD_CTX_copy_ex().
3587 *) Change ssl3_get_message (ssl/s3_both.c) and the functions using it
3588 so that complete 'Handshake' protocol structures are kept in memory
3589 instead of overwriting 'msg_type' and 'length' with 'body' data.
3592 *) Add an implementation of SSL_add_dir_cert_subjects_to_stack for Win32.
3593 [Massimo Santin via Richard Levitte]
3595 *) Major restructuring to the underlying ENGINE code. This includes
3596 reduction of linker bloat, separation of pure "ENGINE" manipulation
3597 (initialisation, etc) from functionality dealing with implementations
3598 of specific crypto iterfaces. This change also introduces integrated
3599 support for symmetric ciphers and digest implementations - so ENGINEs
3600 can now accelerate these by providing EVP_CIPHER and EVP_MD
3601 implementations of their own. This is detailed in crypto/engine/README
3602 as it couldn't be adequately described here. However, there are a few
3603 API changes worth noting - some RSA, DSA, DH, and RAND functions that
3604 were changed in the original introduction of ENGINE code have now
3605 reverted back - the hooking from this code to ENGINE is now a good
3606 deal more passive and at run-time, operations deal directly with
3607 RSA_METHODs, DSA_METHODs (etc) as they did before, rather than
3608 dereferencing through an ENGINE pointer any more. Also, the ENGINE
3609 functions dealing with BN_MOD_EXP[_CRT] handlers have been removed -
3610 they were not being used by the framework as there is no concept of a
3611 BIGNUM_METHOD and they could not be generalised to the new
3612 'ENGINE_TABLE' mechanism that underlies the new code. Similarly,
3613 ENGINE_cpy() has been removed as it cannot be consistently defined in
3617 *) Change ASN1_GENERALIZEDTIME_check() to allow fractional seconds.
3620 *) Change mkdef.pl to sort symbols that get the same entry number,
3621 and make sure the automatically generated functions ERR_load_*
3622 become part of libeay.num as well.
3625 *) New function SSL_renegotiate_pending(). This returns true once
3626 renegotiation has been requested (either SSL_renegotiate() call
3627 or HelloRequest/ClientHello receveived from the peer) and becomes
3628 false once a handshake has been completed.
3629 (For servers, SSL_renegotiate() followed by SSL_do_handshake()
3630 sends a HelloRequest, but does not ensure that a handshake takes
3631 place. SSL_renegotiate_pending() is useful for checking if the
3632 client has followed the request.)
3635 *) New SSL option SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION.
3636 By default, clients may request session resumption even during
3637 renegotiation (if session ID contexts permit); with this option,
3638 session resumption is possible only in the first handshake.
3640 SSL_OP_ALL is now 0x00000FFFL instead of 0x000FFFFFL. This makes
3641 more bits available for options that should not be part of
3642 SSL_OP_ALL (such as SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION).
3645 *) Add some demos for certificate and certificate request creation.
3648 *) Make maximum certificate chain size accepted from the peer application
3649 settable (SSL*_get/set_max_cert_list()), as proposed by
3650 "Douglas E. Engert" <deengert@anl.gov>.
3653 *) Add support for shared libraries for Unixware-7
3654 (Boyd Lynn Gerber <gerberb@zenez.com>).
3657 *) Add a "destroy" handler to ENGINEs that allows structural cleanup to
3658 be done prior to destruction. Use this to unload error strings from
3659 ENGINEs that load their own error strings. NB: This adds two new API
3660 functions to "get" and "set" this destroy handler in an ENGINE.
3663 *) Alter all existing ENGINE implementations (except "openssl" and
3664 "openbsd") to dynamically instantiate their own error strings. This
3665 makes them more flexible to be built both as statically-linked ENGINEs
3666 and self-contained shared-libraries loadable via the "dynamic" ENGINE.
3667 Also, add stub code to each that makes building them as self-contained
3668 shared-libraries easier (see README.ENGINE).
3671 *) Add a "dynamic" ENGINE that provides a mechanism for binding ENGINE
3672 implementations into applications that are completely implemented in
3673 self-contained shared-libraries. The "dynamic" ENGINE exposes control
3674 commands that can be used to configure what shared-library to load and
3675 to control aspects of the way it is handled. Also, made an update to
3676 the README.ENGINE file that brings its information up-to-date and
3677 provides some information and instructions on the "dynamic" ENGINE
3678 (ie. how to use it, how to build "dynamic"-loadable ENGINEs, etc).
3681 *) Make it possible to unload ranges of ERR strings with a new
3682 "ERR_unload_strings" function.
3685 *) Add a copy() function to EVP_MD.
3688 *) Make EVP_MD routines take a context pointer instead of just the
3689 md_data void pointer.
3692 *) Add flags to EVP_MD and EVP_MD_CTX. EVP_MD_FLAG_ONESHOT indicates
3693 that the digest can only process a single chunk of data
3694 (typically because it is provided by a piece of
3695 hardware). EVP_MD_CTX_FLAG_ONESHOT indicates that the application
3696 is only going to provide a single chunk of data, and hence the
3697 framework needn't accumulate the data for oneshot drivers.
3700 *) As with "ERR", make it possible to replace the underlying "ex_data"
3701 functions. This change also alters the storage and management of global
3702 ex_data state - it's now all inside ex_data.c and all "class" code (eg.
3703 RSA, BIO, SSL_CTX, etc) no longer stores its own STACKS and per-class
3704 index counters. The API functions that use this state have been changed
3705 to take a "class_index" rather than pointers to the class's local STACK
3706 and counter, and there is now an API function to dynamically create new
3707 classes. This centralisation allows us to (a) plug a lot of the
3708 thread-safety problems that existed, and (b) makes it possi
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