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 OpenSSL CHANGES
 Changes between 0.9.6 and 0.9.7  [xx XXX 2001]
Bodo Möller's avatar
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     OpenSSL 0.9.6a/0.9.6b (bugfix releases, 5 Apr 2001 and 9 July 2001)
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     and OpenSSL 0.9.7 were developed in parallel, based on OpenSSL 0.9.6.  
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     Change log entries are tagged as follows:
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         -) applies to 0.9.6a/0.9.6b/0.9.6c only
         *) applies to 0.9.6a/0.9.6b/0.9.6c and 0.9.7
  *) New 'shared_ldflag' column in Configure platform table.
     [Richard Levitte]

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  *) Fix EVP_CIPHER_mode macro.
     ["Dan S. Camper" <dan@bti.net>]

  +) Change the AES code to follow the same name structure as all other
     symmetric ciphers, and behave the same way.  Move everything to
     the directory crypto/aes, thereby obsoleting crypto/rijndael.
     [Stephen Sprunk <stephen@sprunk.org> and Richard Levitte]

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  *) Fix ssl3_read_bytes (ssl/s3_pkt.c): To ignore messages of unknown
     type, we must throw them away by setting rr->length to 0.
     [D P Chang <dpc@qualys.com>]

  -) OpenSSL 0.9.6c released [21 dec 2001]

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  +) SECURITY: remove unsafe setjmp/signal interaction from ui_openssl.c.
     [Ben Laurie and Theo de Raadt]

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  *) Fix BN_rand_range bug pointed out by Dominikus Scherkl
     <Dominikus.Scherkl@biodata.com>.  (The previous implementation
     worked incorrectly for those cases where  range = 10..._2  and
     3*range  is two bits longer than  range.)
     [Bodo Moeller]

  *) Only add signing time to PKCS7 structures if it is not already
     present.
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     [Steve Henson]

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  *) Fix crypto/objects/objects.h: "ld-ce" should be "id-ce",
     OBJ_ld_ce should be OBJ_id_ce.
     Also some ip-pda OIDs in crypto/objects/objects.txt were
     incorrect (cf. RFC 3039).
     [Matt Cooper, Frederic Giudicelli, Bodo Moeller]

  +) Add option to output public keys in req command.
     [Massimiliano Pala madwolf@openca.org]

  *) Release CRYPTO_LOCK_DYNLOCK when CRYPTO_destroy_dynlockid()
     returns early because it has nothing to do.
     [Andy Schneider <andy.schneider@bjss.co.uk>]

  *) [In 0.9.6c-engine and 0.9.7 release:]
     Fix mutex callback return values in crypto/engine/hw_ncipher.c.
     [Andy Schneider <andy.schneider@bjss.co.uk>]

  -) [In 0.9.6c-engine release:]
     Add support for Cryptographic Appliance's keyserver technology.
     (Use engine 'keyclient')
     [Cryptographic Appliances and Geoff Thorpe]

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  *) Add a configuration entry for OS/390 Unix.  The C compiler 'c89'
     is called via tools/c89.sh because arguments have to be
     rearranged (all '-L' options must appear before the first object
     modules).
     [Richard Shapiro <rshapiro@abinitio.com>]

  +) Use wNAFs in EC_POINTs_mul() for improved efficiency
     (up to about 10% better than before for P-192 and P-224).
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     [Bodo Moeller]

  -) [In 0.9.6c-engine release:]
     Add support for Broadcom crypto accelerator cards, backported
     from 0.9.7.
     [Broadcom, Nalin Dahyabhai <nalin@redhat.com>, Mark Cox]

  -) [In 0.9.6c-engine release:]
     Add support for SureWare crypto accelerator cards from 
     Baltimore Technologies.  (Use engine 'sureware')
     [Baltimore Technologies and Mark Cox]

  -) [In 0.9.6c-engine release:]
     Add support for crypto accelerator cards from Accelerated
     Encryption Processing, www.aep.ie.  (Use engine 'aep')
     [AEP Inc. and Mark Cox]

  *) Add a configuration entry for gcc on UnixWare.
     [Gary Benson <gbenson@redhat.com>]

  +) New functions/macros

          SSL_CTX_set_msg_callback(ctx, cb)
          SSL_CTX_set_msg_callback_arg(ctx, arg)
          SSL_set_msg_callback(ssl, cb)
          SSL_set_msg_callback_arg(ssl, arg)

     to request calling a callback function

          void cb(int write_p, int version, int content_type,
                  const void *buf, size_t len, SSL *ssl, void *arg)

     whenever a protocol message has been completely received
     (write_p == 0) or sent (write_p == 1).  Here 'version' is the
     protocol version  according to which the SSL library interprets
     the current protocol message (SSL2_VERSION, SSL3_VERSION, or
     TLS1_VERSION).  'content_type' is 0 in the case of SSL 2.0, or
     the content type as defined in the SSL 3.0/TLS 1.0 protocol
     specification (change_cipher_spec(20), alert(21), handshake(22)).
     'buf' and 'len' point to the actual message, 'ssl' to the
     SSL object, and 'arg' is the application-defined value set by
     SSL[_CTX]_set_msg_callback_arg().

     'openssl s_client' and 'openssl s_server' have new '-msg' options
     to enable a callback that displays all protocol messages.
     [Bodo Moeller]

  *) Change ssl/s2_clnt.c and ssl/s2_srvr.c so that received handshake
     messages are stored in a single piece (fixed-length part and
     variable-length part combined) and fix various bugs found on the way.
     [Bodo Moeller]

  +) Change the shared library support so shared libraries are built as
     soon as the corresponding static library is finished, and thereby get
     openssl and the test programs linked against the shared library.
     This still only happens when the keyword "shard" has been given to
     the configuration scripts.

     NOTE: shared library support is still an experimental thing, and
     backward binary compatibility is still not guaranteed.
     ["Maciej W. Rozycki" <macro@ds2.pg.gda.pl> and Richard Levitte]

  +) Add support for Subject Information Access extension.
     [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]

  +) Make BUF_MEM_grow() behaviour more consistent: Initialise to zero
     additional bytes when new memory had to be allocated, not just
     when reusing an existing buffer.
     [Bodo Moeller]

  *) Disable caching in BIO_gethostbyname(), directly use gethostbyname()
     instead.  BIO_gethostbyname() does not know what timeouts are
     appropriate, so entries would stay in cache even when they have
     become invalid.
     [Bodo Moeller; problem pointed out by Rich Salz <rsalz@zolera.com>

  +) New command line and configuration option 'utf8' for the req command.
     This allows field values to be specified as UTF8 strings.
     [Steve Henson]

  +) Add -multi and -mr options to "openssl speed" - giving multiple parallel
     runs for the former and machine-readable output for the latter.
     [Ben Laurie]

  +) Add '-noemailDN' option to 'openssl ca'.  This prevents inclusion
     of the e-mail address in the DN (i.e., it will go into a certificate
     extension only).  The new configuration file option 'email_in_dn = no'
     has the same effect.
     [Massimiliano Pala madwolf@openca.org]

  *) Change ssl23_get_client_hello (ssl/s23_srvr.c) behaviour when
     faced with a pathologically small ClientHello fragment that does
     not contain client_version: Instead of aborting with an error,
     simply choose the highest available protocol version (i.e.,
     TLS 1.0 unless it is disabled).  In practice, ClientHello
     messages are never sent like this, but this change gives us
     strictly correct behaviour at least for TLS.
     [Bodo Moeller]

  +) Change all functions with names starting with des_ to be starting
     with DES_ instead.  This because there are increasing clashes with
     libdes and other des libraries that are currently used by other
     projects.  The old libdes interface is provided, as well as crypt(),
     if openssl/des_old.h is included.  Note that crypt() is no longer
     declared in openssl/des.h.

     NOTE: This is a major break of an old API into a new one.  Software
     authors are encouraged to switch to the DES_ style functions.  Some
     time in the future, des_old.h and the libdes compatibility functions
     will be completely removed.
     [Richard Levitte]

  *) Fix SSL handshake functions and SSL_clear() such that SSL_clear()
     never resets s->method to s->ctx->method when called from within
     one of the SSL handshake functions.
     [Bodo Moeller; problem pointed out by Niko Baric]

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  +) Test for certificates which contain unsupported critical extensions.
     If such a certificate is found during a verify operation it is 
     rejected by default: this behaviour can be overridden by either
     handling the new error X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION or
     by setting the verify flag X509_V_FLAG_IGNORE_CRITICAL. A new function
     X509_supported_extension() has also been added which returns 1 if a
     particular extension is supported.
     [Steve Henson]

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