NEWS

   1
   2   NEWS
   3   ====
   4
   5   This file gives a brief overview of the major changes between each OpenSSL
   6   release. For more details please read the CHANGES file.
   7
   8   Major changes between OpenSSL 1.0.1c and OpenSSL 1.0.1d:
   9
  10       o Fix renegotiation in TLS 1.1, 1.2 by using the correct TLS version.
  11       o Include the fips configuration module.
  12
  13   Major changes between OpenSSL 1.0.1b and OpenSSL 1.0.1c:
  14
  15       o Fix TLS/DTLS record length checking bug CVE-2012-2333
  16       o Don't attempt to use non-FIPS composite ciphers in FIPS mode.
  17
  18   Major changes between OpenSSL 1.0.1a and OpenSSL 1.0.1b:
  19
  20       o Fix compilation error on non-x86 platforms.
  21       o Make FIPS capable OpenSSL ciphers work in non-FIPS mode.
  22       o Fix SSL_OP_NO_TLSv1_1 clash with SSL_OP_ALL in OpenSSL 1.0.0
  23
  24   Major changes between OpenSSL 1.0.1 and OpenSSL 1.0.1a:
  25
  26       o Fix for ASN1 overflow bug CVE-2012-2110
  27       o Workarounds for some servers that hang on long client hellos.
  28       o Fix SEGV in AES code.
  29
  30   Major changes between OpenSSL 1.0.0h and OpenSSL 1.0.1:
  31
  32       o TLS/DTLS heartbeat support.
  33       o SCTP support.
  34       o RFC 5705 TLS key material exporter.
  35       o RFC 5764 DTLS-SRTP negotiation.
  36       o Next Protocol Negotiation.
  37       o PSS signatures in certificates, requests and CRLs.
  38       o Support for password based recipient info for CMS.
  39       o Support TLS v1.2 and TLS v1.1.
  40       o Preliminary FIPS capability for unvalidated 2.0 FIPS module.
  41       o SRP support.
  42
  43   Major changes between OpenSSL 1.0.0h and OpenSSL 1.0.0i:
  44
  45       o Fix for ASN1 overflow bug CVE-2012-2110
  46
  47   Major changes between OpenSSL 1.0.0g and OpenSSL 1.0.0h:
  48
  49       o Fix for CMS/PKCS#7 MMA CVE-2012-0884
  50       o Corrected fix for CVE-2011-4619
  51       o Various DTLS fixes.
  52
  53   Major changes between OpenSSL 1.0.0f and OpenSSL 1.0.0g:
  54
  55       o Fix for DTLS DoS issue CVE-2012-0050
  56
  57   Major changes between OpenSSL 1.0.0e and OpenSSL 1.0.0f:
  58
  59       o Fix for DTLS plaintext recovery attack CVE-2011-4108
  60       o Clear block padding bytes of SSL 3.0 records CVE-2011-4576
  61       o Only allow one SGC handshake restart for SSL/TLS CVE-2011-4619
  62       o Check parameters are not NULL in GOST ENGINE CVE-2012-0027
  63       o Check for malformed RFC3779 data CVE-2011-4577
  64
  65   Major changes between OpenSSL 1.0.0d and OpenSSL 1.0.0e:
  66
  67       o Fix for CRL vulnerability issue CVE-2011-3207
  68       o Fix for ECDH crashes CVE-2011-3210
  69       o Protection against EC timing attacks.
  70       o Support ECDH ciphersuites for certificates using SHA2 algorithms.
  71       o Various DTLS fixes.
  72
  73   Major changes between OpenSSL 1.0.0c and OpenSSL 1.0.0d:
  74
  75       o Fix for security issue CVE-2011-0014
  76
  77   Major changes between OpenSSL 1.0.0b and OpenSSL 1.0.0c:
  78
  79       o Fix for security issue CVE-2010-4180
  80       o Fix for CVE-2010-4252
  81       o Fix mishandling of absent EC point format extension.
  82       o Fix various platform compilation issues.
  83       o Corrected fix for security issue CVE-2010-3864.
  84
  85   Major changes between OpenSSL 1.0.0a and OpenSSL 1.0.0b:
  86
  87       o Fix for security issue CVE-2010-3864.
  88       o Fix for CVE-2010-2939
  89       o Fix WIN32 build system for GOST ENGINE.
  90
  91   Major changes between OpenSSL 1.0.0 and OpenSSL 1.0.0a:
  92
  93       o Fix for security issue CVE-2010-1633.
  94       o GOST MAC and CFB fixes.
  95
  96   Major changes between OpenSSL 0.9.8n and OpenSSL 1.0.0:
  97
  98       o RFC3280 path validation: sufficient to process PKITS tests.
  99       o Integrated support for PVK files and keyblobs.
 100       o Change default private key format to PKCS#8.
 101       o CMS support: able to process all examples in RFC4134
 102       o Streaming ASN1 encode support for PKCS#7 and CMS.
 103       o Multiple signer and signer add support for PKCS#7 and CMS.
 104       o ASN1 printing support.
 105       o Whirlpool hash algorithm added.
 106       o RFC3161 time stamp support.
 107       o New generalised public key API supporting ENGINE based algorithms.
 108       o New generalised public key API utilities.
 109       o New ENGINE supporting GOST algorithms.
 110       o SSL/TLS GOST ciphersuite support.
 111       o PKCS#7 and CMS GOST support.
 112       o RFC4279 PSK ciphersuite support.
 113       o Supported points format extension for ECC ciphersuites.
 114       o ecdsa-with-SHA224/256/384/512 signature types.
 115       o dsa-with-SHA224 and dsa-with-SHA256 signature types.
 116       o Opaque PRF Input TLS extension support.
 117       o Updated time routines to avoid OS limitations.
 118
 119   Major changes between OpenSSL 0.9.8v and OpenSSL 0.9.8w:
 120
 121       o Fix for CVE-2012-2131 (corrected fix for 0.9.8 and CVE-2012-2110)
 122
 123   Major changes between OpenSSL 0.9.8u and OpenSSL 0.9.8v:
 124
 125       o Fix for ASN1 overflow bug CVE-2012-2110
 126
 127   Major changes between OpenSSL 0.9.8t and OpenSSL 0.9.8u:
 128
 129       o Fix for CMS/PKCS#7 MMA CVE-2012-0884
 130       o Corrected fix for CVE-2011-4619
 131       o Various DTLS fixes.
 132
 133   Major changes between OpenSSL 0.9.8s and OpenSSL 0.9.8t:
 134
 135       o Fix for DTLS DoS issue CVE-2012-0050
 136
 137   Major changes between OpenSSL 0.9.8r and OpenSSL 0.9.8s:
 138
 139       o Fix for DTLS plaintext recovery attack CVE-2011-4108
 140       o Fix policy check double free error CVE-2011-4109
 141       o Clear block padding bytes of SSL 3.0 records CVE-2011-4576
 142       o Only allow one SGC handshake restart for SSL/TLS CVE-2011-4619
 143       o Check for malformed RFC3779 data CVE-2011-4577
 144
 145   Major changes between OpenSSL 0.9.8q and OpenSSL 0.9.8r:
 146
 147       o Fix for security issue CVE-2011-0014
 148
 149   Major changes between OpenSSL 0.9.8p and OpenSSL 0.9.8q:
 150
 151       o Fix for security issue CVE-2010-4180
 152       o Fix for CVE-2010-4252
 153
 154   Major changes between OpenSSL 0.9.8o and OpenSSL 0.9.8p:
 155
 156       o Fix for security issue CVE-2010-3864.
 157
 158   Major changes between OpenSSL 0.9.8n and OpenSSL 0.9.8o:
 159
 160       o Fix for security issue CVE-2010-0742.
 161       o Various DTLS fixes.
 162       o Recognise SHA2 certificates if only SSL algorithms added.
 163       o Fix for no-rc4 compilation.
 164       o Chil ENGINE unload workaround.
 165
 166   Major changes between OpenSSL 0.9.8m and OpenSSL 0.9.8n:
 167
 168       o CFB cipher definition fixes.
 169       o Fix security issues CVE-2010-0740 and CVE-2010-0433.
 170
 171   Major changes between OpenSSL 0.9.8l and OpenSSL 0.9.8m:
 172
 173       o Cipher definition fixes.
 174       o Workaround for slow RAND_poll() on some WIN32 versions.
 175       o Remove MD2 from algorithm tables.
 176       o SPKAC handling fixes.
 177       o Support for RFC5746 TLS renegotiation extension.
 178       o Compression memory leak fixed.
 179       o Compression session resumption fixed.
 180       o Ticket and SNI coexistence fixes.
 181       o Many fixes to DTLS handling.
 182
 183   Major changes between OpenSSL 0.9.8k and OpenSSL 0.9.8l:
 184
 185       o Temporary work around for CVE-2009-3555: disable renegotiation.
 186
 187   Major changes between OpenSSL 0.9.8j and OpenSSL 0.9.8k:
 188
 189       o Fix various build issues.
 190       o Fix security issues (CVE-2009-0590, CVE-2009-0591, CVE-2009-0789)
 191
 192   Major changes between OpenSSL 0.9.8i and OpenSSL 0.9.8j:
 193
 194       o Fix security issue (CVE-2008-5077)
 195       o Merge FIPS 140-2 branch code.
 196
 197   Major changes between OpenSSL 0.9.8g and OpenSSL 0.9.8h:
 198
 199       o CryptoAPI ENGINE support.
 200       o Various precautionary measures.
 201       o Fix for bugs affecting certificate request creation.
 202       o Support for local machine keyset attribute in PKCS#12 files.
 203
 204   Major changes between OpenSSL 0.9.8f and OpenSSL 0.9.8g:
 205
 206       o Backport of CMS functionality to 0.9.8.
 207       o Fixes for bugs introduced with 0.9.8f.
 208
 209   Major changes between OpenSSL 0.9.8e and OpenSSL 0.9.8f:
 210
 211       o Add gcc 4.2 support.
 212       o Add support for AES and SSE2 assembly lanugauge optimization
 213         for VC++ build.
 214       o Support for RFC4507bis and server name extensions if explicitly
 215         selected at compile time.
 216       o DTLS improvements.
 217       o RFC4507bis support.
 218       o TLS Extensions support.
 219
 220   Major changes between OpenSSL 0.9.8d and OpenSSL 0.9.8e:
 221
 222       o Various ciphersuite selection fixes.
 223       o RFC3779 support.
 224
 225   Major changes between OpenSSL 0.9.8c and OpenSSL 0.9.8d:
 226
 227       o Introduce limits to prevent malicious key DoS  (CVE-2006-2940)
 228       o Fix security issues (CVE-2006-2937, CVE-2006-3737, CVE-2006-4343)
 229       o Changes to ciphersuite selection algorithm
 230
 231   Major changes between OpenSSL 0.9.8b and OpenSSL 0.9.8c:
 232
 233       o Fix Daniel Bleichenbacher forged signature attack, CVE-2006-4339
 234       o New cipher Camellia
 235
 236   Major changes between OpenSSL 0.9.8a and OpenSSL 0.9.8b:
 237
 238       o Cipher string fixes.
 239       o Fixes for VC++ 2005.
 240       o Updated ECC cipher suite support.
 241       o New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free().
 242       o Zlib compression usage fixes.
 243       o Built in dynamic engine compilation support on Win32.
 244       o Fixes auto dynamic engine loading in Win32.
 245
 246   Major changes between OpenSSL 0.9.8 and OpenSSL 0.9.8a:
 247
 248       o Fix potential SSL 2.0 rollback, CVE-2005-2969
 249       o Extended Windows CE support
 250
 251   Major changes between OpenSSL 0.9.7g and OpenSSL 0.9.8:
 252
 253       o Major work on the BIGNUM library for higher efficiency and to
 254         make operations more streamlined and less contradictory.  This
 255         is the result of a major audit of the BIGNUM library.
 256       o Addition of BIGNUM functions for fields GF(2^m) and NIST
 257         curves, to support the Elliptic Crypto functions.
 258       o Major work on Elliptic Crypto; ECDH and ECDSA added, including
 259         the use through EVP, X509 and ENGINE.
 260       o New ASN.1 mini-compiler that's usable through the OpenSSL
 261         configuration file.
 262       o Added support for ASN.1 indefinite length constructed encoding.
 263       o New PKCS#12 'medium level' API to manipulate PKCS#12 files.
 264       o Complete rework of shared library construction and linking
 265         programs with shared or static libraries, through a separate
 266         Makefile.shared.
 267       o Rework of the passing of parameters from one Makefile to another.
 268       o Changed ENGINE framework to load dynamic engine modules
 269         automatically from specifically given directories.
 270       o New structure and ASN.1 functions for CertificatePair.
 271       o Changed the ZLIB compression method to be stateful.
 272       o Changed the key-generation and primality testing "progress"
 273         mechanism to take a structure that contains the ticker
 274         function and an argument.
 275       o New engine module: GMP (performs private key exponentiation).
 276       o New engine module: VIA PadLOck ACE extension in VIA C3
 277         Nehemiah processors.
 278       o Added support for IPv6 addresses in certificate extensions.
 279         See RFC 1884, section 2.2.
 280       o Added support for certificate policy mappings, policy
 281         constraints and name constraints.
 282       o Added support for multi-valued AVAs in the OpenSSL
 283         configuration file.
 284       o Added support for multiple certificates with the same subject
 285         in the 'openssl ca' index file.
 286       o Make it possible to create self-signed certificates using
 287         'openssl ca -selfsign'.
 288       o Make it possible to generate a serial number file with
 289         'openssl ca -create_serial'.
 290       o New binary search functions with extended functionality.
 291       o New BUF functions.
 292       o New STORE structure and library to provide an interface to all
 293         sorts of data repositories.  Supports storage of public and
 294         private keys, certificates, CRLs, numbers and arbitrary blobs.
 295         This library is unfortunately unfinished and unused withing
 296         OpenSSL.
 297       o New control functions for the error stack.
 298       o Changed the PKCS#7 library to support one-pass S/MIME
 299         processing.
 300       o Added the possibility to compile without old deprecated
 301         functionality with the OPENSSL_NO_DEPRECATED macro or the
 302         'no-deprecated' argument to the config and Configure scripts.
 303       o Constification of all ASN.1 conversion functions, and other
 304         affected functions.
 305       o Improved platform support for PowerPC.
 306       o New FIPS 180-2 algorithms (SHA-224, -256, -384 and -512).
 307       o New X509_VERIFY_PARAM structure to support parametrisation
 308         of X.509 path validation.
 309       o Major overhaul of RC4 performance on Intel P4, IA-64 and
 310         AMD64.
 311       o Changed the Configure script to have some algorithms disabled
 312         by default.  Those can be explicitely enabled with the new
 313         argument form 'enable-xxx'.
 314       o Change the default digest in 'openssl' commands from MD5 to
 315         SHA-1.
 316       o Added support for DTLS.
 317       o New BIGNUM blinding.
 318       o Added support for the RSA-PSS encryption scheme
 319       o Added support for the RSA X.931 padding.
 320       o Added support for BSD sockets on NetWare.
 321       o Added support for files larger than 2GB.
 322       o Added initial support for Win64.
 323       o Added alternate pkg-config files.
 324
 325   Major changes between OpenSSL 0.9.7l and OpenSSL 0.9.7m:
 326
 327       o FIPS 1.1.1 module linking.
 328       o Various ciphersuite selection fixes.
 329
 330   Major changes between OpenSSL 0.9.7k and OpenSSL 0.9.7l:
 331
 332       o Introduce limits to prevent malicious key DoS  (CVE-2006-2940)
 333       o Fix security issues (CVE-2006-2937, CVE-2006-3737, CVE-2006-4343)
 334
 335   Major changes between OpenSSL 0.9.7j and OpenSSL 0.9.7k:
 336
 337       o Fix Daniel Bleichenbacher forged signature attack, CVE-2006-4339
 338
 339   Major changes between OpenSSL 0.9.7i and OpenSSL 0.9.7j:
 340
 341       o Visual C++ 2005 fixes.
 342       o Update Windows build system for FIPS.
 343
 344   Major changes between OpenSSL 0.9.7h and OpenSSL 0.9.7i:
 345
 346       o Give EVP_MAX_MD_SIZE it's old value, except for a FIPS build.
 347
 348   Major changes between OpenSSL 0.9.7g and OpenSSL 0.9.7h:
 349
 350       o Fix SSL 2.0 Rollback, CVE-2005-2969
 351       o Allow use of fixed-length exponent on DSA signing
 352       o Default fixed-window RSA, DSA, DH private-key operations
 353
 354   Major changes between OpenSSL 0.9.7f and OpenSSL 0.9.7g:
 355
 356       o More compilation issues fixed.
 357       o Adaptation to more modern Kerberos API.
 358       o Enhanced or corrected configuration for Solaris64, Mingw and Cygwin.
 359       o Enhanced x86_64 assembler BIGNUM module.
 360       o More constification.
 361       o Added processing of proxy certificates (RFC 3820).
 362
 363   Major changes between OpenSSL 0.9.7e and OpenSSL 0.9.7f:
 364
 365       o Several compilation issues fixed.
 366       o Many memory allocation failure checks added.
 367       o Improved comparison of X509 Name type.
 368       o Mandatory basic checks on certificates.
 369       o Performance improvements.
 370
 371   Major changes between OpenSSL 0.9.7d and OpenSSL 0.9.7e:
 372
 373       o Fix race condition in CRL checking code.
 374       o Fixes to PKCS#7 (S/MIME) code.
 375
 376   Major changes between OpenSSL 0.9.7c and OpenSSL 0.9.7d:
 377
 378       o Security: Fix Kerberos ciphersuite SSL/TLS handshaking bug
 379       o Security: Fix null-pointer assignment in do_change_cipher_spec()
 380       o Allow multiple active certificates with same subject in CA index
 381       o Multiple X509 verification fixes
 382       o Speed up HMAC and other operations
 383
 384   Major changes between OpenSSL 0.9.7b and OpenSSL 0.9.7c:
 385
 386       o Security: fix various ASN1 parsing bugs.
 387       o New -ignore_err option to OCSP utility.
 388       o Various interop and bug fixes in S/MIME code.
 389       o SSL/TLS protocol fix for unrequested client certificates.
 390
 391   Major changes between OpenSSL 0.9.7a and OpenSSL 0.9.7b:
 392
 393       o Security: counter the Klima-Pokorny-Rosa extension of
 394         Bleichbacher's attack
 395       o Security: make RSA blinding default.
 396       o Configuration: Irix fixes, AIX fixes, better mingw support.
 397       o Support for new platforms: linux-ia64-ecc.
 398       o Build: shared library support fixes.
 399       o ASN.1: treat domainComponent correctly.
 400       o Documentation: fixes and additions.
 401
 402   Major changes between OpenSSL 0.9.7 and OpenSSL 0.9.7a:
 403
 404       o Security: Important security related bugfixes.
 405       o Enhanced compatibility with MIT Kerberos.
 406       o Can be built without the ENGINE framework.
 407       o IA32 assembler enhancements.
 408       o Support for new platforms: FreeBSD/IA64 and FreeBSD/Sparc64.
 409       o Configuration: the no-err option now works properly.
 410       o SSL/TLS: now handles manual certificate chain building.
 411       o SSL/TLS: certain session ID malfunctions corrected.
 412
 413   Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.7:
 414
 415       o New library section OCSP.
 416       o Complete rewrite of ASN1 code.
 417       o CRL checking in verify code and openssl utility.
 418       o Extension copying in 'ca' utility.
 419       o Flexible display options in 'ca' utility.
 420       o Provisional support for international characters with UTF8.
 421       o Support for external crypto devices ('engine') is no longer
 422         a separate distribution.
 423       o New elliptic curve library section.
 424       o New AES (Rijndael) library section.
 425       o Support for new platforms: Windows CE, Tandem OSS, A/UX, AIX 64-bit,
 426         Linux x86_64, Linux 64-bit on Sparc v9
 427       o Extended support for some platforms: VxWorks
 428       o Enhanced support for shared libraries.
 429       o Now only builds PIC code when shared library support is requested.
 430       o Support for pkg-config.
 431       o Lots of new manuals.
 432       o Makes symbolic links to or copies of manuals to cover all described
 433         functions.
 434       o Change DES API to clean up the namespace (some applications link also
 435         against libdes providing similar functions having the same name).
 436         Provide macros for backward compatibility (will be removed in the
 437         future).
 438       o Unify handling of cryptographic algorithms (software and engine)
 439         to be available via EVP routines for asymmetric and symmetric ciphers.
 440       o NCONF: new configuration handling routines.
 441       o Change API to use more 'const' modifiers to improve error checking
 442         and help optimizers.
 443       o Finally remove references to RSAref.
 444       o Reworked parts of the BIGNUM code.
 445       o Support for new engines: Broadcom ubsec, Accelerated Encryption
 446         Processing, IBM 4758.
 447       o A few new engines added in the demos area.
 448       o Extended and corrected OID (object identifier) table.
 449       o PRNG: query at more locations for a random device, automatic query for
 450         EGD style random sources at several locations.
 451       o SSL/TLS: allow optional cipher choice according to server's preference.
 452       o SSL/TLS: allow server to explicitly set new session ids.
 453       o SSL/TLS: support Kerberos cipher suites (RFC2712).
 454         Only supports MIT Kerberos for now.
 455       o SSL/TLS: allow more precise control of renegotiations and sessions.
 456       o SSL/TLS: add callback to retrieve SSL/TLS messages.
 457       o SSL/TLS: support AES cipher suites (RFC3268).
 458
 459   Major changes between OpenSSL 0.9.6j and OpenSSL 0.9.6k:
 460
 461       o Security: fix various ASN1 parsing bugs.
 462       o SSL/TLS protocol fix for unrequested client certificates.
 463
 464   Major changes between OpenSSL 0.9.6i and OpenSSL 0.9.6j:
 465
 466       o Security: counter the Klima-Pokorny-Rosa extension of
 467         Bleichbacher's attack
 468       o Security: make RSA blinding default.
 469       o Build: shared library support fixes.
 470
 471   Major changes between OpenSSL 0.9.6h and OpenSSL 0.9.6i:
 472
 473       o Important security related bugfixes.
 474
 475   Major changes between OpenSSL 0.9.6g and OpenSSL 0.9.6h:
 476
 477       o New configuration targets for Tandem OSS and A/UX.
 478       o New OIDs for Microsoft attributes.
 479       o Better handling of SSL session caching.
 480       o Better comparison of distinguished names.
 481       o Better handling of shared libraries in a mixed GNU/non-GNU environment.
 482       o Support assembler code with Borland C.
 483       o Fixes for length problems.
 484       o Fixes for uninitialised variables.
 485       o Fixes for memory leaks, some unusual crashes and some race conditions.
 486       o Fixes for smaller building problems.
 487       o Updates of manuals, FAQ and other instructive documents.
 488
 489   Major changes between OpenSSL 0.9.6f and OpenSSL 0.9.6g:
 490
 491       o Important building fixes on Unix.
 492
 493   Major changes between OpenSSL 0.9.6e and OpenSSL 0.9.6f:
 494
 495       o Various important bugfixes.
 496
 497   Major changes between OpenSSL 0.9.6d and OpenSSL 0.9.6e:
 498
 499       o Important security related bugfixes.
 500       o Various SSL/TLS library bugfixes.
 501
 502   Major changes between OpenSSL 0.9.6c and OpenSSL 0.9.6d:
 503
 504       o Various SSL/TLS library bugfixes.
 505       o Fix DH parameter generation for 'non-standard' generators.
 506
 507   Major changes between OpenSSL 0.9.6b and OpenSSL 0.9.6c:
 508
 509       o Various SSL/TLS library bugfixes.
 510       o BIGNUM library fixes.
 511       o RSA OAEP and random number generation fixes.
 512       o Object identifiers corrected and added.
 513       o Add assembler BN routines for IA64.
 514       o Add support for OS/390 Unix, UnixWare with gcc, OpenUNIX 8,
 515         MIPS Linux; shared library support for Irix, HP-UX.
 516       o Add crypto accelerator support for AEP, Baltimore SureWare,
 517         Broadcom and Cryptographic Appliance's keyserver
 518         [in 0.9.6c-engine release].
 519
 520   Major changes between OpenSSL 0.9.6a and OpenSSL 0.9.6b:
 521
 522       o Security fix: PRNG improvements.
 523       o Security fix: RSA OAEP check.
 524       o Security fix: Reinsert and fix countermeasure to Bleichbacher's
 525         attack.
 526       o MIPS bug fix in BIGNUM.
 527       o Bug fix in "openssl enc".
 528       o Bug fix in X.509 printing routine.
 529       o Bug fix in DSA verification routine and DSA S/MIME verification.
 530       o Bug fix to make PRNG thread-safe.
 531       o Bug fix in RAND_file_name().
 532       o Bug fix in compatibility mode trust settings.
 533       o Bug fix in blowfish EVP.
 534       o Increase default size for BIO buffering filter.
 535       o Compatibility fixes in some scripts.
 536
 537   Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.6a:
 538
 539       o Security fix: change behavior of OpenSSL to avoid using
 540         environment variables when running as root.
 541       o Security fix: check the result of RSA-CRT to reduce the
 542         possibility of deducing the private key from an incorrectly
 543         calculated signature.
 544       o Security fix: prevent Bleichenbacher's DSA attack.
 545       o Security fix: Zero the premaster secret after deriving the
 546         master secret in DH ciphersuites.
 547       o Reimplement SSL_peek(), which had various problems.
 548       o Compatibility fix: the function des_encrypt() renamed to
 549         des_encrypt1() to avoid clashes with some Unixen libc.
 550       o Bug fixes for Win32, HP/UX and Irix.
 551       o Bug fixes in BIGNUM, SSL, PKCS#7, PKCS#12, X.509, CONF and
 552         memory checking routines.
 553       o Bug fixes for RSA operations in threaded environments.
 554       o Bug fixes in misc. openssl applications.
 555       o Remove a few potential memory leaks.
 556       o Add tighter checks of BIGNUM routines.
 557       o Shared library support has been reworked for generality.
 558       o More documentation.
 559       o New function BN_rand_range().
 560       o Add "-rand" option to openssl s_client and s_server.
 561
 562   Major changes between OpenSSL 0.9.5a and OpenSSL 0.9.6:
 563
 564       o Some documentation for BIO and SSL libraries.
 565       o Enhanced chain verification using key identifiers.
 566       o New sign and verify options to 'dgst' application.
 567       o Support for DER and PEM encoded messages in 'smime' application.
 568       o New 'rsautl' application, low level RSA utility.
 569       o MD4 now included.
 570       o Bugfix for SSL rollback padding check.
 571       o Support for external crypto devices [1].
 572       o Enhanced EVP interface.
 573
 574     [1] The support for external crypto devices is currently a separate
 575         distribution.  See the file README.ENGINE.
 576
 577   Major changes between OpenSSL 0.9.5 and OpenSSL 0.9.5a:
 578
 579       o Bug fixes for Win32, SuSE Linux, NeXTSTEP and FreeBSD 2.2.8
 580       o Shared library support for HPUX and Solaris-gcc
 581       o Support of Linux/IA64
 582       o Assembler support for Mingw32
 583       o New 'rand' application
 584       o New way to check for existence of algorithms from scripts
 585
 586   Major changes between OpenSSL 0.9.4 and OpenSSL 0.9.5:
 587
 588       o S/MIME support in new 'smime' command
 589       o Documentation for the OpenSSL command line application
 590       o Automation of 'req' application
 591       o Fixes to make s_client, s_server work under Windows
 592       o Support for multiple fieldnames in SPKACs
 593       o New SPKAC command line utilty and associated library functions
 594       o Options to allow passwords to be obtained from various sources
 595       o New public key PEM format and options to handle it
 596       o Many other fixes and enhancements to command line utilities
 597       o Usable certificate chain verification
 598       o Certificate purpose checking
 599       o Certificate trust settings
 600       o Support of authority information access extension
 601       o Extensions in certificate requests
 602       o Simplified X509 name and attribute routines
 603       o Initial (incomplete) support for international character sets
 604       o New DH_METHOD, DSA_METHOD and enhanced RSA_METHOD
 605       o Read only memory BIOs and simplified creation function
 606       o TLS/SSL protocol bugfixes: Accept TLS 'client hello' in SSL 3.0
 607         record; allow fragmentation and interleaving of handshake and other
 608         data
 609       o TLS/SSL code now "tolerates" MS SGC
 610       o Work around for Netscape client certificate hang bug
 611       o RSA_NULL option that removes RSA patent code but keeps other
 612         RSA functionality
 613       o Memory leak detection now allows applications to add extra information
 614         via a per-thread stack
 615       o PRNG robustness improved
 616       o EGD support
 617       o BIGNUM library bug fixes
 618       o Faster DSA parameter generation
 619       o Enhanced support for Alpha Linux
 620       o Experimental MacOS support
 621
 622   Major changes between OpenSSL 0.9.3 and OpenSSL 0.9.4:
 623
 624       o Transparent support for PKCS#8 format private keys: these are used
 625         by several software packages and are more secure than the standard
 626         form
 627       o PKCS#5 v2.0 implementation
 628       o Password callbacks have a new void * argument for application data
 629       o Avoid various memory leaks
 630       o New pipe-like BIO that allows using the SSL library when actual I/O
 631         must be handled by the application (BIO pair)
 632
 633   Major changes between OpenSSL 0.9.2b and OpenSSL 0.9.3:
 634       o Lots of enhancements and cleanups to the Configuration mechanism
 635       o RSA OEAP related fixes
 636       o Added `openssl ca -revoke' option for revoking a certificate
 637       o Source cleanups: const correctness, type-safe stacks and ASN.1 SETs
 638       o Source tree cleanups: removed lots of obsolete files
 639       o Thawte SXNet, certificate policies and CRL distribution points
 640         extension support
 641       o Preliminary (experimental) S/MIME support
 642       o Support for ASN.1 UTF8String and VisibleString
 643       o Full integration of PKCS#12 code
 644       o Sparc assembler bignum implementation, optimized hash functions
 645       o Option to disable selected ciphers
 646
 647   Major changes between OpenSSL 0.9.1c and OpenSSL 0.9.2b:
 648       o Fixed a security hole related to session resumption
 649       o Fixed RSA encryption routines for the p < q case
 650       o "ALL" in cipher lists now means "everything except NULL ciphers"
 651       o Support for Triple-DES CBCM cipher
 652       o Support of Optimal Asymmetric Encryption Padding (OAEP) for RSA
 653       o First support for new TLSv1 ciphers
 654       o Added a few new BIOs (syslog BIO, reliable BIO)
 655       o Extended support for DSA certificate/keys.
 656       o Extended support for Certificate Signing Requests (CSR)
 657       o Initial support for X.509v3 extensions
 658       o Extended support for compression inside the SSL record layer
 659       o Overhauled Win32 builds
 660       o Cleanups and fixes to the Big Number (BN) library
 661       o Support for ASN.1 GeneralizedTime
 662       o Splitted ASN.1 SETs from SEQUENCEs
 663       o ASN1 and PEM support for Netscape Certificate Sequences
 664       o Overhauled Perl interface
 665       o Lots of source tree cleanups.
 666       o Lots of memory leak fixes.
 667       o Lots of bug fixes.
 668
 669   Major changes between SSLeay 0.9.0b and OpenSSL 0.9.1c:
 670       o Integration of the popular NO_RSA/NO_DSA patches
 671       o Initial support for compression inside the SSL record layer
 672       o Added BIO proxy and filtering functionality
 673       o Extended Big Number (BN) library
 674       o Added RIPE MD160 message digest
 675       o Addeed support for RC2/64bit cipher
 676       o Extended ASN.1 parser routines
 677       o Adjustations of the source tree for CVS
 678       o Support for various new platforms
 679