NEWS

  NEWS
  ====

  This file gives a brief overview of the major changes between each OpenSSL
  release. For more details please read the CHANGES file.

  Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.7:

      o New library section OCSP.
      o Complete rewrite of ASN1 code.
      o CRL checking in verify code and openssl utility.
      o Extension copying in 'ca' utility.
      o Flexible display options in 'ca' utility.
      o Provisional support for international characters with UTF8.
      o Support for external crypto devices ('engine') is no longer
        a separate distribution.
      o New elliptic curve library section.
      o New AES (Rijndael) library section.
      o Change DES API to clean up the namespace (some applications link also
        against libdes providing similar functions having the same name).
        Provide macros for backward compatibility (will be removed in the
        future).
      o Unifiy handling of cryptographic algorithms (software and
        engine) to be available via EVP routines for asymmetric and
        symmetric ciphers.
      o NCONF: new configuration handling routines.
      o Change API to use more 'const' modifiers to improve error checking
        and help optimizers.
      o Finally remove references to RSAref.
      o Reworked parts of the BIGNUM code.
      o Support for new engines: Broadcom ubsec, Accelerated Encryption
        Processing, IBM 4758.
      o PRNG: query at more locations for a random device, automatic query for
        EGD style random sources at several locations.
      o SSL/TLS: allow optional cipher choice according to server's preference.
      o SSL/TLS: allow server to explicitly set new session ids.
      o SSL/TLS: support Kerberos cipher suites (RFC2712).
      o SSL/TLS: allow more precise control of renegotiations and sessions.
      o SSL/TLS: add callback to retrieve SSL/TLS messages.

  Changes between OpenSSL 0.9.6c and OpenSSL 0.9.6d:

      o Various SSL/TLS library bugfixes.
      o Fix DH parameter generation for 'non-standard' generators.

  Changes between OpenSSL 0.9.6b and OpenSSL 0.9.6c:

      o Various SSL/TLS library bugfixes.
      o BIGNUM library fixes.
      o RSA OAEP and random number generation fixes.
      o Object identifiers corrected and added.
      o Add assembler BN routines for IA64.
      o Add support for OS/390 Unix, UnixWare with gcc, OpenUNIX 8,
        MIPS Linux; shared library support for Irix, HP-UX.
      o Add crypto accelerator support for AEP, Baltimore SureWare,
        Broadcom and Cryptographic Appliance's keyserver
        [in 0.9.6c-engine release].

  Changes between OpenSSL 0.9.6a and OpenSSL 0.9.6b:

      o Security fix: PRNG improvements.
      o Security fix: RSA OAEP check.
      o Security fix: Reinsert and fix countermeasure to Bleichbacher's
        attack.
      o MIPS bug fix in BIGNUM.
      o Bug fix in "openssl enc".
      o Bug fix in X.509 printing routine.
      o Bug fix in DSA verification routine and DSA S/MIME verification.
      o Bug fix to make PRNG thread-safe.
      o Bug fix in RAND_file_name().
      o Bug fix in compatibility mode trust settings.
      o Bug fix in blowfish EVP.
      o Increase default size for BIO buffering filter.
      o Compatibility fixes in some scripts.

  Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.6a:

      o Security fix: change behavior of OpenSSL to avoid using
        environment variables when running as root.
      o Security fix: check the result of RSA-CRT to reduce the
        possibility of deducing the private key from an incorrectly
        calculated signature.
      o Security fix: prevent Bleichenbacher's DSA attack.
      o Security fix: Zero the premaster secret after deriving the
        master secret in DH ciphersuites.
      o Reimplement SSL_peek(), which had various problems.
      o Compatibility fix: the function des_encrypt() renamed to
        des_encrypt1() to avoid clashes with some Unixen libc.
      o Bug fixes for Win32, HP/UX and Irix.
      o Bug fixes in BIGNUM, SSL, PKCS#7, PKCS#12, X.509, CONF and
        memory checking routines.
      o Bug fixes for RSA operations in threaded enviroments.
      o Bug fixes in misc. openssl applications.
      o Remove a few potential memory leaks.
      o Add tighter checks of BIGNUM routines.
      o Shared library support has been reworked for generality.
      o More documentation.
      o New function BN_rand_range().
      o Add "-rand" option to openssl s_client and s_server.

  Major changes between OpenSSL 0.9.5a and OpenSSL 0.9.6:

      o Some documentation for BIO and SSL libraries.
      o Enhanced chain verification using key identifiers.
      o New sign and verify options to 'dgst' application.
      o Support for DER and PEM encoded messages in 'smime' application.
      o New 'rsautl' application, low level RSA utility.
      o MD4 now included.
      o Bugfix for SSL rollback padding check.
      o Support for external crypto devices [1].
      o Enhanced EVP interface.

    [1] The support for external crypto devices is currently a separate
        distribution.  See the file README.ENGINE.

  Major changes between OpenSSL 0.9.5 and OpenSSL 0.9.5a:

      o Bug fixes for Win32, SuSE Linux, NeXTSTEP and FreeBSD 2.2.8 
      o Shared library support for HPUX and Solaris-gcc
      o Support of Linux/IA64
      o Assembler support for Mingw32
      o New 'rand' application
      o New way to check for existence of algorithms from scripts

  Major changes between OpenSSL 0.9.4 and OpenSSL 0.9.5:

      o S/MIME support in new 'smime' command
      o Documentation for the OpenSSL command line application
      o Automation of 'req' application
      o Fixes to make s_client, s_server work under Windows
      o Support for multiple fieldnames in SPKACs
      o New SPKAC command line utilty and associated library functions
      o Options to allow passwords to be obtained from various sources
      o New public key PEM format and options to handle it
      o Many other fixes and enhancements to command line utilities
      o Usable certificate chain verification
      o Certificate purpose checking
      o Certificate trust settings
      o Support of authority information access extension
      o Extensions in certificate requests
      o Simplified X509 name and attribute routines
      o Initial (incomplete) support for international character sets
      o New DH_METHOD, DSA_METHOD and enhanced RSA_METHOD
      o Read only memory BIOs and simplified creation function
      o TLS/SSL protocol bugfixes: Accept TLS 'client hello' in SSL 3.0
        record; allow fragmentation and interleaving of handshake and other
        data
      o TLS/SSL code now "tolerates" MS SGC
      o Work around for Netscape client certificate hang bug
      o RSA_NULL option that removes RSA patent code but keeps other
        RSA functionality
      o Memory leak detection now allows applications to add extra information
        via a per-thread stack
      o PRNG robustness improved
      o EGD support
      o BIGNUM library bug fixes
      o Faster DSA parameter generation
      o Enhanced support for Alpha Linux
      o Experimental MacOS support

  Major changes between OpenSSL 0.9.3 and OpenSSL 0.9.4:

      o Transparent support for PKCS#8 format private keys: these are used
        by several software packages and are more secure than the standard
        form
      o PKCS#5 v2.0 implementation
      o Password callbacks have a new void * argument for application data
      o Avoid various memory leaks
      o New pipe-like BIO that allows using the SSL library when actual I/O
        must be handled by the application (BIO pair)

  Major changes between OpenSSL 0.9.2b and OpenSSL 0.9.3:
      o Lots of enhancements and cleanups to the Configuration mechanism
      o RSA OEAP related fixes
      o Added `openssl ca -revoke' option for revoking a certificate
      o Source cleanups: const correctness, type-safe stacks and ASN.1 SETs
      o Source tree cleanups: removed lots of obsolete files
      o Thawte SXNet, certificate policies and CRL distribution points
        extension support
      o Preliminary (experimental) S/MIME support
      o Support for ASN.1 UTF8String and VisibleString
      o Full integration of PKCS#12 code
      o Sparc assembler bignum implementation, optimized hash functions
      o Option to disable selected ciphers

  Major changes between OpenSSL 0.9.1c and OpenSSL 0.9.2b:
      o Fixed a security hole related to session resumption
      o Fixed RSA encryption routines for the p < q case
      o "ALL" in cipher lists now means "everything except NULL ciphers"
      o Support for Triple-DES CBCM cipher
      o Support of Optimal Asymmetric Encryption Padding (OAEP) for RSA
      o First support for new TLSv1 ciphers
      o Added a few new BIOs (syslog BIO, reliable BIO)
      o Extended support for DSA certificate/keys.
      o Extended support for Certificate Signing Requests (CSR)
      o Initial support for X.509v3 extensions
      o Extended support for compression inside the SSL record layer
      o Overhauled Win32 builds
      o Cleanups and fixes to the Big Number (BN) library
      o Support for ASN.1 GeneralizedTime
      o Splitted ASN.1 SETs from SEQUENCEs
      o ASN1 and PEM support for Netscape Certificate Sequences
      o Overhauled Perl interface
      o Lots of source tree cleanups.
      o Lots of memory leak fixes.
      o Lots of bug fixes.

  Major changes between SSLeay 0.9.0b and OpenSSL 0.9.1c:
      o Integration of the popular NO_RSA/NO_DSA patches
      o Initial support for compression inside the SSL record layer
      o Added BIO proxy and filtering functionality
      o Extended Big Number (BN) library
      o Added RIPE MD160 message digest
      o Addeed support for RC2/64bit cipher
      o Extended ASN.1 parser routines
      o Adjustations of the source tree for CVS
      o Support for various new platforms