+ Changes between 0.9.5a and 0.9.6 [xx XXX 2000]
+
+ *) When some versions of IIS use the 'NET' form of private key the
+ key derivation algorithm is different. Normally MD5(password) is
+ used as a 128 bit RC4 key. In the modified case
+ MD5(MD5(password) + "SGCKEYSALT") is used insted. Added some
+ new functions i2d_RSA_NET(), d2i_RSA_NET() etc which are the same
+ as the old Netscape_RSA functions except they have an additional
+ 'sgckey' parameter which uses the modified algorithm. Also added
+ an -sgckey command line option to the rsa utility. Thanks to
+ Adrian Peck <bertie@ncipher.com> for posting details of the modified
+ algorithm to openssl-dev.
+ [Steve Henson]
+
+ *) The evp_local.h macros were using 'c.##kname' which resulted in
+ invalid expansion on some systems (SCO 5.0.5 for example).
+ Corrected to 'c.kname'.
+ [Phillip Porch <root@theporch.com>]
+
+ *) New X509_get1_email() and X509_REQ_get1_email() functions that return
+ a STACK of email addresses from a certificate or request, these look
+ in the subject name and the subject alternative name extensions and
+ omit any duplicate addresses.
+ [Steve Henson]
+
+ *) Re-implement BN_mod_exp2_mont using independent (and larger) windows.
+ This makes DSA verification about 2 % faster.
+ [Bodo Moeller]
+
+ *) Increase maximum window size in BN_mod_exp_... to 6 bits instead of 5
+ (meaning that now 2^5 values will be precomputed, which is only 4 KB
+ plus overhead for 1024 bit moduli).
+ This makes exponentiations about 0.5 % faster for 1024 bit
+ exponents (as measured by "openssl speed rsa2048").
+ [Bodo Moeller]
+
+ *) Rename memory handling macros to avoid conflicts with other
+ software:
+ Malloc => OPENSSL_malloc
+ Malloc_locked => OPENSSL_malloc_locked
+ Realloc => OPENSSL_realloc
+ Free => OPENSSL_free
+ [Richard Levitte]
+
+ *) New function BN_mod_exp_mont_word for small bases (roughly 15%
+ faster than BN_mod_exp_mont, i.e. 7% for a full DH exchange).
+ [Bodo Moeller]
+
+ *) CygWin32 support.
+ [John Jarvie <jjarvie@newsguy.com>]
+
+ *) The type-safe stack code has been rejigged. It is now only compiled
+ in when OpenSSL is configured with the DEBUG_SAFESTACK option and
+ by default all type-specific stack functions are "#define"d back to
+ standard stack functions. This results in more streamlined output
+ but retains the type-safety checking possibilities of the original
+ approach.
+ [Geoff Thorpe]
+
+ *) The STACK code has been cleaned up, and certain type declarations
+ that didn't make a lot of sense have been brought in line. This has
+ also involved a cleanup of sorts in safestack.h to more correctly
+ map type-safe stack functions onto their plain stack counterparts.
+ This work has also resulted in a variety of "const"ifications of
+ lots of the code, especially "_cmp" operations which should normally
+ be prototyped with "const" parameters anyway.
+ [Geoff Thorpe]
+
+ *) When generating bytes for the first time in md_rand.c, 'stir the pool'
+ by seeding with STATE_SIZE dummy bytes (with zero entropy count).
+ (The PRNG state consists of two parts, the large pool 'state' and 'md',
+ where all of 'md' is used each time the PRNG is used, but 'state'
+ is used only indexed by a cyclic counter. As entropy may not be
+ well distributed from the beginning, 'md' is important as a
+ chaining variable. However, the output function chains only half
+ of 'md', i.e. 80 bits. ssleay_rand_add, on the other hand, chains
+ all of 'md', and seeding with STATE_SIZE dummy bytes will result
+ in all of 'state' being rewritten, with the new values depending
+ on virtually all of 'md'. This overcomes the 80 bit limitation.)
+ [Bodo Moeller]
+
+ *) In ssl/s2_clnt.c and ssl/s3_clnt.c, call ERR_clear_error() when
+ the handshake is continued after ssl_verify_cert_chain();
+ otherwise, if SSL_VERIFY_NONE is set, remaining error codes
+ can lead to 'unexplainable' connection aborts later.
+ [Bodo Moeller; problem tracked down by Lutz Jaenicke]
+
+ *) Major EVP API cipher revision.
+ Add hooks for extra EVP features. This allows various cipher
+ parameters to be set in the EVP interface. Support added for variable
+ key length ciphers via the EVP_CIPHER_CTX_set_key_length() function and
+ setting of RC2 and RC5 parameters.
+
+ Modify EVP_OpenInit() and EVP_SealInit() to cope with variable key length
+ ciphers.
+
+ Remove lots of duplicated code from the EVP library. For example *every*
+ cipher init() function handles the 'iv' in the same way according to the
+ cipher mode. They also all do nothing if the 'key' parameter is NULL and
+ for CFB and OFB modes they zero ctx->num.
+
+ New functionality allows removal of S/MIME code RC2 hack.
+
+ Most of the routines have the same form and so can be declared in terms
+ of macros.
+
+ By shifting this to the top level EVP_CipherInit() it can be removed from
+ all individual ciphers. If the cipher wants to handle IVs or keys
+ differently it can set the EVP_CIPH_CUSTOM_IV or EVP_CIPH_ALWAYS_CALL_INIT
+ flags.
+
+ Change lots of functions like EVP_EncryptUpdate() to now return a
+ value: although software versions of the algorithms cannot fail
+ any installed hardware versions can.
+ [Steve Henson]
+
+ *) Implement SSL_OP_TLS_ROLLBACK_BUG: In ssl3_get_client_key_exchange, if
+ this option is set, tolerate broken clients that send the negotiated
+ protocol version number instead of the requested protocol version
+ number.
+ [Bodo Moeller]
+
+ *) Call dh_tmp_cb (set by ..._TMP_DH_CB) with correct 'is_export' flag;
+ i.e. non-zero for export ciphersuites, zero otherwise.
+ Previous versions had this flag inverted, inconsistent with
+ rsa_tmp_cb (..._TMP_RSA_CB).
+ [Bodo Moeller; problem reported by Amit Chopra]
+
+ *) Add missing DSA library text string. Work around for some IIS
+ key files with invalid SEQUENCE encoding.
+ [Steve Henson]
+
+ *) Add a document (doc/standards.txt) that list all kinds of standards
+ and so on that are implemented in OpenSSL.
+ [Richard Levitte]
+
+ *) Enhance c_rehash script. Old version would mishandle certificates
+ with the same subject name hash and wouldn't handle CRLs at all.
+ Added -fingerprint option to crl utility, to support new c_rehash
+ features.
+ [Steve Henson]
+
+ *) Eliminate non-ANSI declarations in crypto.h and stack.h.
+ [Ulf Möller]
+
+ *) Fix for SSL server purpose checking. Server checking was
+ rejecting certificates which had extended key usage present
+ but no ssl client purpose.
+ [Steve Henson, reported by Rene Grosser <grosser@hisolutions.com>]
+
+ *) Make PKCS#12 code work with no password. The PKCS#12 spec
+ is a little unclear about how a blank password is handled.
+ Since the password in encoded as a BMPString with terminating
+ double NULL a zero length password would end up as just the
+ double NULL. However no password at all is different and is
+ handled differently in the PKCS#12 key generation code. NS
+ treats a blank password as zero length. MSIE treats it as no
+ password on export: but it will try both on import. We now do
+ the same: PKCS12_parse() tries zero length and no password if
+ the password is set to "" or NULL (NULL is now a valid password:
+ it wasn't before) as does the pkcs12 application.
+ [Steve Henson]
+
+ *) Bugfixes in apps/x509.c: Avoid a memory leak; and don't use
+ perror when PEM_read_bio_X509_REQ fails, the error message must
+ be obtained from the error queue.
+ [Bodo Moeller]
+
+ *) Avoid 'thread_hash' memory leak in crypto/err/err.c by freeing
+ it in ERR_remove_state if appropriate, and change ERR_get_state
+ accordingly to avoid race conditions (this is necessary because
+ thread_hash is no longer constant once set).
+ [Bodo Moeller]
+
+ *) Bugfix for linux-elf makefile.one.
+ [Ulf Möller]
+
+ *) RSA_get_default_method() will now cause a default
+ RSA_METHOD to be chosen if one doesn't exist already.
+ Previously this was only set during a call to RSA_new()
+ or RSA_new_method(NULL) meaning it was possible for
+ RSA_get_default_method() to return NULL.
+ [Geoff Thorpe]
+
+ *) Added native name translation to the existing DSO code
+ that will convert (if the flag to do so is set) filenames
+ that are sufficiently small and have no path information
+ into a canonical native form. Eg. "blah" converted to
+ "libblah.so" or "blah.dll" etc.
+ [Geoff Thorpe]
+
+ *) New function ERR_error_string_n(e, buf, len) which is like
+ ERR_error_string(e, buf), but writes at most 'len' bytes
+ including the 0 terminator. For ERR_error_string_n, 'buf'
+ may not be NULL.
+ [Damien Miller <djm@mindrot.org>, Bodo Moeller]
+
+ *) CONF library reworked to become more general. A new CONF
+ configuration file reader "class" is implemented as well as a
+ new functions (NCONF_*, for "New CONF") to handle it. The now
+ old CONF_* functions are still there, but are reimplemented to
+ work in terms of the new functions. Also, a set of functions
+ to handle the internal storage of the configuration data is
+ provided to make it easier to write new configuration file
+ reader "classes" (I can definitely see something reading a
+ configuration file in XML format, for example), called _CONF_*,
+ or "the configuration storage API"...
+
+ The new configuration file reading functions are:
+
+ NCONF_new, NCONF_free, NCONF_load, NCONF_load_fp, NCONF_load_bio,
+ NCONF_get_section, NCONF_get_string, NCONF_get_numbre
+
+ NCONF_default, NCONF_WIN32
+
+ NCONF_dump_fp, NCONF_dump_bio
+
+ NCONF_default and NCONF_WIN32 are method (or "class") choosers,
+ NCONF_new creates a new CONF object. This works in the same way
+ as other interfaces in OpenSSL, like the BIO interface.
+ NCONF_dump_* dump the internal storage of the configuration file,
+ which is useful for debugging. All other functions take the same
+ arguments as the old CONF_* functions wth the exception of the
+ first that must be a `CONF *' instead of a `LHASH *'.
+
+ To make it easer to use the new classes with the old CONF_* functions,
+ the function CONF_set_default_method is provided.
+ [Richard Levitte]
+
+ *) Add '-tls1' option to 'openssl ciphers', which was already
+ mentioned in the documentation but had not been implemented.
+ (This option is not yet really useful because even the additional
+ experimental TLS 1.0 ciphers are currently treated as SSL 3.0 ciphers.)
+ [Bodo Moeller]
+
+ *) Initial DSO code added into libcrypto for letting OpenSSL (and
+ OpenSSL-based applications) load shared libraries and bind to
+ them in a portable way.
+ [Geoff Thorpe, with contributions from Richard Levitte]
+
+ Changes between 0.9.5 and 0.9.5a [1 Apr 2000]
+
+ *) Make sure _lrotl and _lrotr are only used with MSVC.
+
+ *) Use lock CRYPTO_LOCK_RAND correctly in ssleay_rand_status
+ (the default implementation of RAND_status).
+
+ *) Rename openssl x509 option '-crlext', which was added in 0.9.5,
+ to '-clrext' (= clear extensions), as intended and documented.
+ [Bodo Moeller; inconsistency pointed out by Michael Attili
+ <attili@amaxo.com>]
+
+ *) Fix for HMAC. It wasn't zeroing the rest of the block if the key length
+ was larger than the MD block size.
+ [Steve Henson, pointed out by Yost William <YostW@tce.com>]
+
+ *) Modernise PKCS12_parse() so it uses STACK_OF(X509) for its ca argument
+ fix a leak when the ca argument was passed as NULL. Stop X509_PUBKEY_set()
+ using the passed key: if the passed key was a private key the result
+ of X509_print(), for example, would be to print out all the private key
+ components.
+ [Steve Henson]
+
+ *) des_quad_cksum() byte order bug fix.
+ [Ulf Möller, using the problem description in krb4-0.9.7, where
+ the solution is attributed to Derrick J Brashear <shadow@DEMENTIA.ORG>]
+
+ *) Fix so V_ASN1_APP_CHOOSE works again: however its use is strongly
+ discouraged.
+ [Steve Henson, pointed out by Brian Korver <briank@cs.stanford.edu>]
+
+ *) For easily testing in shell scripts whether some command
+ 'openssl XXX' exists, the new pseudo-command 'openssl no-XXX'
+ returns with exit code 0 iff no command of the given name is available.
+ 'no-XXX' is printed in this case, 'XXX' otherwise. In both cases,
+ the output goes to stdout and nothing is printed to stderr.
+ Additional arguments are always ignored.
+
+ Since for each cipher there is a command of the same name,
+ the 'no-cipher' compilation switches can be tested this way.
+
+ ('openssl no-XXX' is not able to detect pseudo-commands such
+ as 'quit', 'list-XXX-commands', or 'no-XXX' itself.)
+ [Bodo Moeller]
+
+ *) Update test suite so that 'make test' succeeds in 'no-rsa' configuration.
+ [Bodo Moeller]
+
+ *) For SSL_[CTX_]set_tmp_dh, don't create a DH key if SSL_OP_SINGLE_DH_USE
+ is set; it will be thrown away anyway because each handshake creates
+ its own key.
+ ssl_cert_dup, which is used by SSL_new, now copies DH keys in addition
+ to parameters -- in previous versions (since OpenSSL 0.9.3) the
+ 'default key' from SSL_CTX_set_tmp_dh would always be lost, meanining
+ you effectivly got SSL_OP_SINGLE_DH_USE when using this macro.
+ [Bodo Moeller]
+
+ *) New s_client option -ign_eof: EOF at stdin is ignored, and
+ 'Q' and 'R' lose their special meanings (quit/renegotiate).
+ This is part of what -quiet does; unlike -quiet, -ign_eof
+ does not suppress any output.
+ [Richard Levitte]
+
+ *) Add compatibility options to the purpose and trust code. The
+ purpose X509_PURPOSE_ANY is "any purpose" which automatically
+ accepts a certificate or CA, this was the previous behaviour,
+ with all the associated security issues.
+
+ X509_TRUST_COMPAT is the old trust behaviour: only and
+ automatically trust self signed roots in certificate store. A
+ new trust setting X509_TRUST_DEFAULT is used to specify that
+ a purpose has no associated trust setting and it should instead
+ use the value in the default purpose.
+ [Steve Henson]
+
+ *) Fix the PKCS#8 DSA private key code so it decodes keys again
+ and fix a memory leak.
+ [Steve Henson]
+
+ *) In util/mkerr.pl (which implements 'make errors'), preserve
+ reason strings from the previous version of the .c file, as
+ the default to have only downcase letters (and digits) in
+ automatically generated reasons codes is not always appropriate.
+ [Bodo Moeller]
+
+ *) In ERR_load_ERR_strings(), build an ERR_LIB_SYS error reason table
+ using strerror. Previously, ERR_reason_error_string() returned
+ library names as reason strings for SYSerr; but SYSerr is a special
+ case where small numbers are errno values, not library numbers.
+ [Bodo Moeller]
+
+ *) Add '-dsaparam' option to 'openssl dhparam' application. This
+ converts DSA parameters into DH parameters. (When creating parameters,
+ DSA_generate_parameters is used.)
+ [Bodo Moeller]
+
+ *) Include 'length' (recommended exponent length) in C code generated
+ by 'openssl dhparam -C'.
+ [Bodo Moeller]
+
+ *) The second argument to set_label in perlasm was already being used
+ so couldn't be used as a "file scope" flag. Moved to third argument
+ which was free.
+ [Steve Henson]
+
+ *) In PEM_ASN1_write_bio and some other functions, use RAND_pseudo_bytes
+ instead of RAND_bytes for encryption IVs and salts.
+ [Bodo Moeller]
+
+ *) Include RAND_status() into RAND_METHOD instead of implementing
+ it only for md_rand.c Otherwise replacing the PRNG by calling
+ RAND_set_rand_method would be impossible.
+ [Bodo Moeller]
+
+ *) Don't let DSA_generate_key() enter an infinite loop if the random
+ number generation fails.
+ [Bodo Moeller]
+
+ *) New 'rand' application for creating pseudo-random output.
+ [Bodo Moeller]
+
+ *) Added configuration support for Linux/IA64
+ [Rolf Haberrecker <rolf@suse.de>]
+
+ *) Assembler module support for Mingw32.
+ [Ulf Möller]
+
+ *) Shared library support for HPUX (in shlib/).
+ [Lutz Jaenicke <Lutz.Jaenicke@aet.TU-Cottbus.DE> and Anonymous]
+
+ *) Shared library support for Solaris gcc.
+ [Lutz Behnke <behnke@trustcenter.de>]
+
+ Changes between 0.9.4 and 0.9.5 [28 Feb 2000]
+
+ *) PKCS7_encrypt() was adding text MIME headers twice because they
+ were added manually and by SMIME_crlf_copy().
+ [Steve Henson]
+
+ *) In bntest.c don't call BN_rand with zero bits argument.
+ [Steve Henson, pointed out by Andrew W. Gray <agray@iconsinc.com>]
+
+ *) BN_mul bugfix: In bn_mul_part_recursion() only the a>a[n] && b>b[n]
+ case was implemented. This caused BN_div_recp() to fail occasionally.
+ [Ulf Möller]
+
+ *) Add an optional second argument to the set_label() in the perl
+ assembly language builder. If this argument exists and is set
+ to 1 it signals that the assembler should use a symbol whose
+ scope is the entire file, not just the current function. This
+ is needed with MASM which uses the format label:: for this scope.
+ [Steve Henson, pointed out by Peter Runestig <peter@runestig.com>]
+
+ *) Change the ASN1 types so they are typedefs by default. Before
+ almost all types were #define'd to ASN1_STRING which was causing
+ STACK_OF() problems: you couldn't declare STACK_OF(ASN1_UTF8STRING)
+ for example.
+ [Steve Henson]
+
+ *) Change names of new functions to the new get1/get0 naming
+ convention: After 'get1', the caller owns a reference count
+ and has to call ..._free; 'get0' returns a pointer to some
+ data structure without incrementing reference counters.
+ (Some of the existing 'get' functions increment a reference
+ counter, some don't.)
+ Similarly, 'set1' and 'add1' functions increase reference
+ counters or duplicate objects.
+ [Steve Henson]
+
+ *) Allow for the possibility of temp RSA key generation failure:
+ the code used to assume it always worked and crashed on failure.
+ [Steve Henson]
+
+ *) Fix potential buffer overrun problem in BIO_printf().
+ [Ulf Möller, using public domain code by Patrick Powell; problem
+ pointed out by David Sacerdote <das33@cornell.edu>]
+
+ *) Support EGD <http://www.lothar.com/tech/crypto/>. New functions
+ RAND_egd() and RAND_status(). In the command line application,
+ the EGD socket can be specified like a seed file using RANDFILE
+ or -rand.
+ [Ulf Möller]
+
+ *) Allow the string CERTIFICATE to be tolerated in PKCS#7 structures.
+ Some CAs (e.g. Verisign) distribute certificates in this form.
+ [Steve Henson]
+
+ *) Remove the SSL_ALLOW_ADH compile option and set the default cipher
+ list to exclude them. This means that no special compilation option
+ is needed to use anonymous DH: it just needs to be included in the
+ cipher list.
+ [Steve Henson]
+
+ *) Change the EVP_MD_CTX_type macro so its meaning consistent with
+ EVP_MD_type. The old functionality is available in a new macro called
+ EVP_MD_md(). Change code that uses it and update docs.
+ [Steve Henson]
+
+ *) ..._ctrl functions now have corresponding ..._callback_ctrl functions
+ where the 'void *' argument is replaced by a function pointer argument.
+ Previously 'void *' was abused to point to functions, which works on
+ many platforms, but is not correct. As these functions are usually
+ called by macros defined in OpenSSL header files, most source code
+ should work without changes.
+ [Richard Levitte]
+
+ *) <openssl/opensslconf.h> (which is created by Configure) now contains
+ sections with information on -D... compiler switches used for
+ compiling the library so that applications can see them. To enable
+ one of these sections, a pre-processor symbol OPENSSL_..._DEFINES
+ must be defined. E.g.,
+ #define OPENSSL_ALGORITHM_DEFINES
+ #include <openssl/opensslconf.h>
+ defines all pertinent NO_<algo> symbols, such as NO_IDEA, NO_RSA, etc.
+ [Richard Levitte, Ulf and Bodo Möller]
+
+ *) Bugfix: Tolerate fragmentation and interleaving in the SSL 3/TLS
+ record layer.
+ [Bodo Moeller]
+
+ *) Change the 'other' type in certificate aux info to a STACK_OF
+ X509_ALGOR. Although not an AlgorithmIdentifier as such it has
+ the required ASN1 format: arbitrary types determined by an OID.
+ [Steve Henson]
+
+ *) Add some PEM_write_X509_REQ_NEW() functions and a command line
+ argument to 'req'. This is not because the function is newer or
+ better than others it just uses the work 'NEW' in the certificate
+ request header lines. Some software needs this.
+ [Steve Henson]
+
+ *) Reorganise password command line arguments: now passwords can be
+ obtained from various sources. Delete the PEM_cb function and make
+ it the default behaviour: i.e. if the callback is NULL and the
+ usrdata argument is not NULL interpret it as a null terminated pass
+ phrase. If usrdata and the callback are NULL then the pass phrase
+ is prompted for as usual.
+ [Steve Henson]
+
+ *) Add support for the Compaq Atalla crypto accelerator. If it is installed,
+ the support is automatically enabled. The resulting binaries will
+ autodetect the card and use it if present.
+ [Ben Laurie and Compaq Inc.]
+
+ *) Work around for Netscape hang bug. This sends certificate request
+ and server done in one record. Since this is perfectly legal in the
+ SSL/TLS protocol it isn't a "bug" option and is on by default. See
+ the bugs/SSLv3 entry for more info.
+ [Steve Henson]
+
+ *) HP-UX tune-up: new unified configs, HP C compiler bug workaround.
+ [Andy Polyakov]
+
+ *) Add -rand argument to smime and pkcs12 applications and read/write
+ of seed file.
+ [Steve Henson]
+
+ *) New 'passwd' tool for crypt(3) and apr1 password hashes.
+ [Bodo Moeller]
+
+ *) Add command line password options to the remaining applications.
+ [Steve Henson]
+
+ *) Bug fix for BN_div_recp() for numerators with an even number of
+ bits.
+ [Ulf Möller]
+
+ *) More tests in bntest.c, and changed test_bn output.
+ [Ulf Möller]
+
+ *) ./config recognizes MacOS X now.
+ [Andy Polyakov]
+
+ *) Bug fix for BN_div() when the first words of num and divsor are
+ equal (it gave wrong results if (rem=(n1-q*d0)&BN_MASK2) < d0).
+ [Ulf Möller]
+
+ *) Add support for various broken PKCS#8 formats, and command line
+ options to produce them.
+ [Steve Henson]
+
+ *) New functions BN_CTX_start(), BN_CTX_get() and BT_CTX_end() to
+ get temporary BIGNUMs from a BN_CTX.
+ [Ulf Möller]
+
+ *) Correct return values in BN_mod_exp_mont() and BN_mod_exp2_mont()
+ for p == 0.
+ [Ulf Möller]
+
+ *) Change the SSLeay_add_all_*() functions to OpenSSL_add_all_*() and
+ include a #define from the old name to the new. The original intent
+ was that statically linked binaries could for example just call
+ SSLeay_add_all_ciphers() to just add ciphers to the table and not
+ link with digests. This never worked becayse SSLeay_add_all_digests()
+ and SSLeay_add_all_ciphers() were in the same source file so calling
+ one would link with the other. They are now in separate source files.
+ [Steve Henson]
+
+ *) Add a new -notext option to 'ca' and a -pubkey option to 'spkac'.
+ [Steve Henson]
+
+ *) Use a less unusual form of the Miller-Rabin primality test (it used
+ a binary algorithm for exponentiation integrated into the Miller-Rabin
+ loop, our standard modexp algorithms are faster).
+ [Bodo Moeller]
+
+ *) Support for the EBCDIC character set completed.
+ [Martin Kraemer <Martin.Kraemer@Mch.SNI.De>]
+
+ *) Source code cleanups: use const where appropriate, eliminate casts,
+ use void * instead of char * in lhash.
+ [Ulf Möller]
+
+ *) Bugfix: ssl3_send_server_key_exchange was not restartable
+ (the state was not changed to SSL3_ST_SW_KEY_EXCH_B, and because of
+ this the server could overwrite ephemeral keys that the client
+ has already seen).
+ [Bodo Moeller]
+
+ *) Turn DSA_is_prime into a macro that calls BN_is_prime,
+ using 50 iterations of the Rabin-Miller test.
+
+ DSA_generate_parameters now uses BN_is_prime_fasttest (with 50
+ iterations of the Rabin-Miller test as required by the appendix
+ to FIPS PUB 186[-1]) instead of DSA_is_prime.
+ As BN_is_prime_fasttest includes trial division, DSA parameter
+ generation becomes much faster.
+
+ This implies a change for the callback functions in DSA_is_prime
+ and DSA_generate_parameters: The callback function is called once
+ for each positive witness in the Rabin-Miller test, not just
+ occasionally in the inner loop; and the parameters to the
+ callback function now provide an iteration count for the outer
+ loop rather than for the current invocation of the inner loop.
+ DSA_generate_parameters additionally can call the callback
+ function with an 'iteration count' of -1, meaning that a
+ candidate has passed the trial division test (when q is generated
+ from an application-provided seed, trial division is skipped).
+ [Bodo Moeller]
+
+ *) New function BN_is_prime_fasttest that optionally does trial
+ division before starting the Rabin-Miller test and has
+ an additional BN_CTX * argument (whereas BN_is_prime always
+ has to allocate at least one BN_CTX).
+ 'callback(1, -1, cb_arg)' is called when a number has passed the
+ trial division stage.
+ [Bodo Moeller]
+
+ *) Fix for bug in CRL encoding. The validity dates weren't being handled
+ as ASN1_TIME.
+ [Steve Henson]
+
+ *) New -pkcs12 option to CA.pl script to write out a PKCS#12 file.
+ [Steve Henson]
+
+ *) New function BN_pseudo_rand().
+ [Ulf Möller]
+
+ *) Clean up BN_mod_mul_montgomery(): replace the broken (and unreadable)
+ bignum version of BN_from_montgomery() with the working code from
+ SSLeay 0.9.0 (the word based version is faster anyway), and clean up
+ the comments.
+ [Ulf Möller]
+
+ *) Avoid a race condition in s2_clnt.c (function get_server_hello) that
+ made it impossible to use the same SSL_SESSION data structure in
+ SSL2 clients in multiple threads.
+ [Bodo Moeller]
+
+ *) The return value of RAND_load_file() no longer counts bytes obtained
+ by stat(). RAND_load_file(..., -1) is new and uses the complete file
+ to seed the PRNG (previously an explicit byte count was required).
+ [Ulf Möller, Bodo Möller]
+
+ *) Clean up CRYPTO_EX_DATA functions, some of these didn't have prototypes
+ used (char *) instead of (void *) and had casts all over the place.
+ [Steve Henson]
+
+ *) Make BN_generate_prime() return NULL on error if ret!=NULL.
+ [Ulf Möller]
+
+ *) Retain source code compatibility for BN_prime_checks macro:
+ BN_is_prime(..., BN_prime_checks, ...) now uses
+ BN_prime_checks_for_size to determine the appropriate number of
+ Rabin-Miller iterations.
+ [Ulf Möller]
+
+ *) Diffie-Hellman uses "safe" primes: DH_check() return code renamed to
+ DH_CHECK_P_NOT_SAFE_PRIME.
+ (Check if this is true? OpenPGP calls them "strong".)
+ [Ulf Möller]
+
+ *) Merge the functionality of "dh" and "gendh" programs into a new program
+ "dhparam". The old programs are retained for now but will handle DH keys
+ (instead of parameters) in future.
+ [Steve Henson]
+
+ *) Make the ciphers, s_server and s_client programs check the return values
+ when a new cipher list is set.
+ [Steve Henson]
+
+ *) Enhance the SSL/TLS cipher mechanism to correctly handle the TLS 56bit
+ ciphers. Before when the 56bit ciphers were enabled the sorting was
+ wrong.
+
+ The syntax for the cipher sorting has been extended to support sorting by
+ cipher-strength (using the strength_bits hard coded in the tables).
+ The new command is "@STRENGTH" (see also doc/apps/ciphers.pod).
+
+ Fix a bug in the cipher-command parser: when supplying a cipher command
+ string with an "undefined" symbol (neither command nor alphanumeric
+ [A-Za-z0-9], ssl_set_cipher_list used to hang in an endless loop. Now
+ an error is flagged.
+
+ Due to the strength-sorting extension, the code of the
+ ssl_create_cipher_list() function was completely rearranged. I hope that
+ the readability was also increased :-)
+ [Lutz Jaenicke <Lutz.Jaenicke@aet.TU-Cottbus.DE>]
+
+ *) Minor change to 'x509' utility. The -CAcreateserial option now uses 1
+ for the first serial number and places 2 in the serial number file. This
+ avoids problems when the root CA is created with serial number zero and
+ the first user certificate has the same issuer name and serial number
+ as the root CA.
+ [Steve Henson]
+
+ *) Fixes to X509_ATTRIBUTE utilities, change the 'req' program so it uses
+ the new code. Add documentation for this stuff.
+ [Steve Henson]
+
+ *) Changes to X509_ATTRIBUTE utilities. These have been renamed from
+ X509_*() to X509at_*() on the grounds that they don't handle X509
+ structures and behave in an analagous way to the X509v3 functions:
+ they shouldn't be called directly but wrapper functions should be used
+ instead.
+
+ So we also now have some wrapper functions that call the X509at functions
+ when passed certificate requests. (TO DO: similar things can be done with
+ PKCS#7 signed and unsigned attributes, PKCS#12 attributes and a few other
+ things. Some of these need some d2i or i2d and print functionality
+ because they handle more complex structures.)
+ [Steve Henson]
+
+ *) Add missing #ifndefs that caused missing symbols when building libssl
+ as a shared library without RSA. Use #ifndef NO_SSL2 instead of
+ NO_RSA in ssl/s2*.c.
+ [Kris Kennaway <kris@hub.freebsd.org>, modified by Ulf Möller]
+
+ *) Precautions against using the PRNG uninitialized: RAND_bytes() now
+ has a return value which indicates the quality of the random data
+ (1 = ok, 0 = not seeded). Also an error is recorded on the thread's
+ error queue. New function RAND_pseudo_bytes() generates output that is
+ guaranteed to be unique but not unpredictable. RAND_add is like
+ RAND_seed, but takes an extra argument for an entropy estimate
+ (RAND_seed always assumes full entropy).
+ [Ulf Möller]
+
+ *) Do more iterations of Rabin-Miller probable prime test (specifically,
+ 3 for 1024-bit primes, 6 for 512-bit primes, 12 for 256-bit primes
+ instead of only 2 for all lengths; see BN_prime_checks_for_size definition
+ in crypto/bn/bn_prime.c for the complete table). This guarantees a
+ false-positive rate of at most 2^-80 for random input.
+ [Bodo Moeller]
+
+ *) Rewrite ssl3_read_n (ssl/s3_pkt.c) avoiding a couple of bugs.
+ [Bodo Moeller]
+
+ *) New function X509_CTX_rget_chain() (renamed to X509_CTX_get1_chain
+ in the 0.9.5 release), this returns the chain
+ from an X509_CTX structure with a dup of the stack and all
+ the X509 reference counts upped: so the stack will exist
+ after X509_CTX_cleanup() has been called. Modify pkcs12.c
+ to use this.
+
+ Also make SSL_SESSION_print() print out the verify return
+ code.
+ [Steve Henson]
+
+ *) Add manpage for the pkcs12 command. Also change the default
+ behaviour so MAC iteration counts are used unless the new
+ -nomaciter option is used. This improves file security and
+ only older versions of MSIE (4.0 for example) need it.
+ [Steve Henson]
+
+ *) Honor the no-xxx Configure options when creating .DEF files.
+ [Ulf Möller]
+
+ *) Add PKCS#10 attributes to field table: challengePassword,
+ unstructuredName and unstructuredAddress. These are taken from
+ draft PKCS#9 v2.0 but are compatible with v1.2 provided no
+ international characters are used.
+
+ More changes to X509_ATTRIBUTE code: allow the setting of types
+ based on strings. Remove the 'loc' parameter when adding
+ attributes because these will be a SET OF encoding which is sorted
+ in ASN1 order.
+ [Steve Henson]
+
+ *) Initial changes to the 'req' utility to allow request generation
+ automation. This will allow an application to just generate a template
+ file containing all the field values and have req construct the
+ request.
+
+ Initial support for X509_ATTRIBUTE handling. Stacks of these are
+ used all over the place including certificate requests and PKCS#7
+ structures. They are currently handled manually where necessary with
+ some primitive wrappers for PKCS#7. The new functions behave in a
+ manner analogous to the X509 extension functions: they allow
+ attributes to be looked up by NID and added.
+
+ Later something similar to the X509V3 code would be desirable to
+ automatically handle the encoding, decoding and printing of the
+ more complex types. The string types like challengePassword can
+ be handled by the string table functions.
+
+ Also modified the multi byte string table handling. Now there is
+ a 'global mask' which masks out certain types. The table itself
+ can use the flag STABLE_NO_MASK to ignore the mask setting: this
+ is useful when for example there is only one permissible type
+ (as in countryName) and using the mask might result in no valid
+ types at all.
+ [Steve Henson]
+
+ *) Clean up 'Finished' handling, and add functions SSL_get_finished and
+ SSL_get_peer_finished to allow applications to obtain the latest
+ Finished messages sent to the peer or expected from the peer,
+ respectively. (SSL_get_peer_finished is usually the Finished message
+ actually received from the peer, otherwise the protocol will be aborted.)
+
+ As the Finished message are message digests of the complete handshake
+ (with a total of 192 bits for TLS 1.0 and more for SSL 3.0), they can
+ be used for external authentication procedures when the authentication
+ provided by SSL/TLS is not desired or is not enough.
+ [Bodo Moeller]
+
+ *) Enhanced support for Alpha Linux is added. Now ./config checks if
+ the host supports BWX extension and if Compaq C is present on the
+ $PATH. Just exploiting of the BWX extension results in 20-30%
+ performance kick for some algorithms, e.g. DES and RC4 to mention
+ a couple. Compaq C in turn generates ~20% faster code for MD5 and
+ SHA1.
+ [Andy Polyakov]
+
+ *) Add support for MS "fast SGC". This is arguably a violation of the
+ SSL3/TLS protocol. Netscape SGC does two handshakes: the first with
+ weak crypto and after checking the certificate is SGC a second one
+ with strong crypto. MS SGC stops the first handshake after receiving
+ the server certificate message and sends a second client hello. Since
+ a server will typically do all the time consuming operations before
+ expecting any further messages from the client (server key exchange
+ is the most expensive) there is little difference between the two.
+
+ To get OpenSSL to support MS SGC we have to permit a second client
+ hello message after we have sent server done. In addition we have to
+ reset the MAC if we do get this second client hello.
+ [Steve Henson]
+
+ *) Add a function 'd2i_AutoPrivateKey()' this will automatically decide
+ if a DER encoded private key is RSA or DSA traditional format. Changed
+ d2i_PrivateKey_bio() to use it. This is only needed for the "traditional"
+ format DER encoded private key. Newer code should use PKCS#8 format which
+ has the key type encoded in the ASN1 structure. Added DER private key
+ support to pkcs8 application.
+ [Steve Henson]
+
+ *) SSL 3/TLS 1 servers now don't request certificates when an anonymous
+ ciphersuites has been selected (as required by the SSL 3/TLS 1
+ specifications). Exception: When SSL_VERIFY_FAIL_IF_NO_PEER_CERT
+ is set, we interpret this as a request to violate the specification
+ (the worst that can happen is a handshake failure, and 'correct'
+ behaviour would result in a handshake failure anyway).
+ [Bodo Moeller]
+
+ *) In SSL_CTX_add_session, take into account that there might be multiple
+ SSL_SESSION structures with the same session ID (e.g. when two threads
+ concurrently obtain them from an external cache).
+ The internal cache can handle only one SSL_SESSION with a given ID,
+ so if there's a conflict, we now throw out the old one to achieve
+ consistency.
+ [Bodo Moeller]
+
+ *) Add OIDs for idea and blowfish in CBC mode. This will allow both
+ to be used in PKCS#5 v2.0 and S/MIME. Also add checking to
+ some routines that use cipher OIDs: some ciphers do not have OIDs
+ defined and so they cannot be used for S/MIME and PKCS#5 v2.0 for
+ example.
+ [Steve Henson]
+
+ *) Simplify the trust setting structure and code. Now we just have
+ two sequences of OIDs for trusted and rejected settings. These will
+ typically have values the same as the extended key usage extension
+ and any application specific purposes.
+
+ The trust checking code now has a default behaviour: it will just
+ check for an object with the same NID as the passed id. Functions can
+ be provided to override either the default behaviour or the behaviour
+ for a given id. SSL client, server and email already have functions
+ in place for compatibility: they check the NID and also return "trusted"
+ if the certificate is self signed.
+ [Steve Henson]
+
+ *) Add d2i,i2d bio/fp functions for PrivateKey: these convert the
+ traditional format into an EVP_PKEY structure.
+ [Steve Henson]
+
+ *) Add a password callback function PEM_cb() which either prompts for
+ a password if usr_data is NULL or otherwise assumes it is a null
+ terminated password. Allow passwords to be passed on command line
+ environment or config files in a few more utilities.
+ [Steve Henson]
+
+ *) Add a bunch of DER and PEM functions to handle PKCS#8 format private
+ keys. Add some short names for PKCS#8 PBE algorithms and allow them
+ to be specified on the command line for the pkcs8 and pkcs12 utilities.
+ Update documentation.
+ [Steve Henson]