5 This file gives a brief overview of the major changes between each OpenSSL
6 release. For more details please read the CHANGES file.
8 Major changes between OpenSSL 0.9.8a and OpenSSL 0.9.8b:
10 o Cipher string fixes.
11 o Fixes for VC++ 2005.
12 o Updated ECC cipher suite support.
13 o New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free().
14 o Zlib compression usage fixes.
15 o Built in dynamic engine compilation support on Win32.
16 o Fixes auto dynamic engine loading in Win32.
18 Major changes between OpenSSL 0.9.8 and OpenSSL 0.9.8a:
20 o Fix potential SSL 2.0 rollback, CAN-2005-2969
21 o Extended Windows CE support
23 Major changes between OpenSSL 0.9.7g and OpenSSL 0.9.8:
25 o Major work on the BIGNUM library for higher efficiency and to
26 make operations more streamlined and less contradictory. This
27 is the result of a major audit of the BIGNUM library.
28 o Addition of BIGNUM functions for fields GF(2^m) and NIST
29 curves, to support the Elliptic Crypto functions.
30 o Major work on Elliptic Crypto; ECDH and ECDSA added, including
31 the use through EVP, X509 and ENGINE.
32 o New ASN.1 mini-compiler that's usable through the OpenSSL
34 o Added support for ASN.1 indefinite length constructed encoding.
35 o New PKCS#12 'medium level' API to manipulate PKCS#12 files.
36 o Complete rework of shared library construction and linking
37 programs with shared or static libraries, through a separate
39 o Rework of the passing of parameters from one Makefile to another.
40 o Changed ENGINE framework to load dynamic engine modules
41 automatically from specifically given directories.
42 o New structure and ASN.1 functions for CertificatePair.
43 o Changed the ZLIB compression method to be stateful.
44 o Changed the key-generation and primality testing "progress"
45 mechanism to take a structure that contains the ticker
46 function and an argument.
47 o New engine module: GMP (performs private key exponentiation).
48 o New engine module: VIA PadLOck ACE extension in VIA C3
50 o Added support for IPv6 addresses in certificate extensions.
51 See RFC 1884, section 2.2.
52 o Added support for certificate policy mappings, policy
53 constraints and name constraints.
54 o Added support for multi-valued AVAs in the OpenSSL
56 o Added support for multiple certificates with the same subject
57 in the 'openssl ca' index file.
58 o Make it possible to create self-signed certificates using
59 'openssl ca -selfsign'.
60 o Make it possible to generate a serial number file with
61 'openssl ca -create_serial'.
62 o New binary search functions with extended functionality.
64 o New STORE structure and library to provide an interface to all
65 sorts of data repositories. Supports storage of public and
66 private keys, certificates, CRLs, numbers and arbitrary blobs.
67 This library is unfortunately unfinished and unused withing
69 o New control functions for the error stack.
70 o Changed the PKCS#7 library to support one-pass S/MIME
72 o Added the possibility to compile without old deprecated
73 functionality with the OPENSSL_NO_DEPRECATED macro or the
74 'no-deprecated' argument to the config and Configure scripts.
75 o Constification of all ASN.1 conversion functions, and other
77 o Improved platform support for PowerPC.
78 o New FIPS 180-2 algorithms (SHA-224, -256, -384 and -512).
79 o New X509_VERIFY_PARAM structure to support parametrisation
80 of X.509 path validation.
81 o Major overhaul of RC4 performance on Intel P4, IA-64 and
83 o Changed the Configure script to have some algorithms disabled
84 by default. Those can be explicitely enabled with the new
85 argument form 'enable-xxx'.
86 o Change the default digest in 'openssl' commands from MD5 to
88 o Added support for DTLS.
89 o New BIGNUM blinding.
90 o Added support for the RSA-PSS encryption scheme
91 o Added support for the RSA X.931 padding.
92 o Added support for BSD sockets on NetWare.
93 o Added support for files larger than 2GB.
94 o Added initial support for Win64.
95 o Added alternate pkg-config files.
97 Major changes between OpenSSL 0.9.7i and OpenSSL 0.9.7j:
99 o Visual C++ 2005 fixes.
100 o Update Windows build system for FIPS.
102 Major changes between OpenSSL 0.9.7h and OpenSSL 0.9.7i:
104 o Give EVP_MAX_MD_SIZE it's old value, except for a FIPS build.
106 Major changes between OpenSSL 0.9.7g and OpenSSL 0.9.7h:
108 o Fix SSL 2.0 Rollback, CAN-2005-2969
109 o Allow use of fixed-length exponent on DSA signing
110 o Default fixed-window RSA, DSA, DH private-key operations
112 Major changes between OpenSSL 0.9.7f and OpenSSL 0.9.7g:
114 o More compilation issues fixed.
115 o Adaptation to more modern Kerberos API.
116 o Enhanced or corrected configuration for Solaris64, Mingw and Cygwin.
117 o Enhanced x86_64 assembler BIGNUM module.
118 o More constification.
119 o Added processing of proxy certificates (RFC 3820).
121 Major changes between OpenSSL 0.9.7e and OpenSSL 0.9.7f:
123 o Several compilation issues fixed.
124 o Many memory allocation failure checks added.
125 o Improved comparison of X509 Name type.
126 o Mandatory basic checks on certificates.
127 o Performance improvements.
129 Major changes between OpenSSL 0.9.7d and OpenSSL 0.9.7e:
131 o Fix race condition in CRL checking code.
132 o Fixes to PKCS#7 (S/MIME) code.
134 Major changes between OpenSSL 0.9.7c and OpenSSL 0.9.7d:
136 o Security: Fix Kerberos ciphersuite SSL/TLS handshaking bug
137 o Security: Fix null-pointer assignment in do_change_cipher_spec()
138 o Allow multiple active certificates with same subject in CA index
139 o Multiple X509 verification fixes
140 o Speed up HMAC and other operations
142 Major changes between OpenSSL 0.9.7b and OpenSSL 0.9.7c:
144 o Security: fix various ASN1 parsing bugs.
145 o New -ignore_err option to OCSP utility.
146 o Various interop and bug fixes in S/MIME code.
147 o SSL/TLS protocol fix for unrequested client certificates.
149 Major changes between OpenSSL 0.9.7a and OpenSSL 0.9.7b:
151 o Security: counter the Klima-Pokorny-Rosa extension of
152 Bleichbacher's attack
153 o Security: make RSA blinding default.
154 o Configuration: Irix fixes, AIX fixes, better mingw support.
155 o Support for new platforms: linux-ia64-ecc.
156 o Build: shared library support fixes.
157 o ASN.1: treat domainComponent correctly.
158 o Documentation: fixes and additions.
160 Major changes between OpenSSL 0.9.7 and OpenSSL 0.9.7a:
162 o Security: Important security related bugfixes.
163 o Enhanced compatibility with MIT Kerberos.
164 o Can be built without the ENGINE framework.
165 o IA32 assembler enhancements.
166 o Support for new platforms: FreeBSD/IA64 and FreeBSD/Sparc64.
167 o Configuration: the no-err option now works properly.
168 o SSL/TLS: now handles manual certificate chain building.
169 o SSL/TLS: certain session ID malfunctions corrected.
171 Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.7:
173 o New library section OCSP.
174 o Complete rewrite of ASN1 code.
175 o CRL checking in verify code and openssl utility.
176 o Extension copying in 'ca' utility.
177 o Flexible display options in 'ca' utility.
178 o Provisional support for international characters with UTF8.
179 o Support for external crypto devices ('engine') is no longer
180 a separate distribution.
181 o New elliptic curve library section.
182 o New AES (Rijndael) library section.
183 o Support for new platforms: Windows CE, Tandem OSS, A/UX, AIX 64-bit,
184 Linux x86_64, Linux 64-bit on Sparc v9
185 o Extended support for some platforms: VxWorks
186 o Enhanced support for shared libraries.
187 o Now only builds PIC code when shared library support is requested.
188 o Support for pkg-config.
189 o Lots of new manuals.
190 o Makes symbolic links to or copies of manuals to cover all described
192 o Change DES API to clean up the namespace (some applications link also
193 against libdes providing similar functions having the same name).
194 Provide macros for backward compatibility (will be removed in the
196 o Unify handling of cryptographic algorithms (software and engine)
197 to be available via EVP routines for asymmetric and symmetric ciphers.
198 o NCONF: new configuration handling routines.
199 o Change API to use more 'const' modifiers to improve error checking
201 o Finally remove references to RSAref.
202 o Reworked parts of the BIGNUM code.
203 o Support for new engines: Broadcom ubsec, Accelerated Encryption
204 Processing, IBM 4758.
205 o A few new engines added in the demos area.
206 o Extended and corrected OID (object identifier) table.
207 o PRNG: query at more locations for a random device, automatic query for
208 EGD style random sources at several locations.
209 o SSL/TLS: allow optional cipher choice according to server's preference.
210 o SSL/TLS: allow server to explicitly set new session ids.
211 o SSL/TLS: support Kerberos cipher suites (RFC2712).
212 Only supports MIT Kerberos for now.
213 o SSL/TLS: allow more precise control of renegotiations and sessions.
214 o SSL/TLS: add callback to retrieve SSL/TLS messages.
215 o SSL/TLS: support AES cipher suites (RFC3268).
217 Major changes between OpenSSL 0.9.6j and OpenSSL 0.9.6k:
219 o Security: fix various ASN1 parsing bugs.
220 o SSL/TLS protocol fix for unrequested client certificates.
222 Major changes between OpenSSL 0.9.6i and OpenSSL 0.9.6j:
224 o Security: counter the Klima-Pokorny-Rosa extension of
225 Bleichbacher's attack
226 o Security: make RSA blinding default.
227 o Build: shared library support fixes.
229 Major changes between OpenSSL 0.9.6h and OpenSSL 0.9.6i:
231 o Important security related bugfixes.
233 Major changes between OpenSSL 0.9.6g and OpenSSL 0.9.6h:
235 o New configuration targets for Tandem OSS and A/UX.
236 o New OIDs for Microsoft attributes.
237 o Better handling of SSL session caching.
238 o Better comparison of distinguished names.
239 o Better handling of shared libraries in a mixed GNU/non-GNU environment.
240 o Support assembler code with Borland C.
241 o Fixes for length problems.
242 o Fixes for uninitialised variables.
243 o Fixes for memory leaks, some unusual crashes and some race conditions.
244 o Fixes for smaller building problems.
245 o Updates of manuals, FAQ and other instructive documents.
247 Major changes between OpenSSL 0.9.6f and OpenSSL 0.9.6g:
249 o Important building fixes on Unix.
251 Major changes between OpenSSL 0.9.6e and OpenSSL 0.9.6f:
253 o Various important bugfixes.
255 Major changes between OpenSSL 0.9.6d and OpenSSL 0.9.6e:
257 o Important security related bugfixes.
258 o Various SSL/TLS library bugfixes.
260 Major changes between OpenSSL 0.9.6c and OpenSSL 0.9.6d:
262 o Various SSL/TLS library bugfixes.
263 o Fix DH parameter generation for 'non-standard' generators.
265 Major changes between OpenSSL 0.9.6b and OpenSSL 0.9.6c:
267 o Various SSL/TLS library bugfixes.
268 o BIGNUM library fixes.
269 o RSA OAEP and random number generation fixes.
270 o Object identifiers corrected and added.
271 o Add assembler BN routines for IA64.
272 o Add support for OS/390 Unix, UnixWare with gcc, OpenUNIX 8,
273 MIPS Linux; shared library support for Irix, HP-UX.
274 o Add crypto accelerator support for AEP, Baltimore SureWare,
275 Broadcom and Cryptographic Appliance's keyserver
276 [in 0.9.6c-engine release].
278 Major changes between OpenSSL 0.9.6a and OpenSSL 0.9.6b:
280 o Security fix: PRNG improvements.
281 o Security fix: RSA OAEP check.
282 o Security fix: Reinsert and fix countermeasure to Bleichbacher's
284 o MIPS bug fix in BIGNUM.
285 o Bug fix in "openssl enc".
286 o Bug fix in X.509 printing routine.
287 o Bug fix in DSA verification routine and DSA S/MIME verification.
288 o Bug fix to make PRNG thread-safe.
289 o Bug fix in RAND_file_name().
290 o Bug fix in compatibility mode trust settings.
291 o Bug fix in blowfish EVP.
292 o Increase default size for BIO buffering filter.
293 o Compatibility fixes in some scripts.
295 Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.6a:
297 o Security fix: change behavior of OpenSSL to avoid using
298 environment variables when running as root.
299 o Security fix: check the result of RSA-CRT to reduce the
300 possibility of deducing the private key from an incorrectly
301 calculated signature.
302 o Security fix: prevent Bleichenbacher's DSA attack.
303 o Security fix: Zero the premaster secret after deriving the
304 master secret in DH ciphersuites.
305 o Reimplement SSL_peek(), which had various problems.
306 o Compatibility fix: the function des_encrypt() renamed to
307 des_encrypt1() to avoid clashes with some Unixen libc.
308 o Bug fixes for Win32, HP/UX and Irix.
309 o Bug fixes in BIGNUM, SSL, PKCS#7, PKCS#12, X.509, CONF and
310 memory checking routines.
311 o Bug fixes for RSA operations in threaded environments.
312 o Bug fixes in misc. openssl applications.
313 o Remove a few potential memory leaks.
314 o Add tighter checks of BIGNUM routines.
315 o Shared library support has been reworked for generality.
316 o More documentation.
317 o New function BN_rand_range().
318 o Add "-rand" option to openssl s_client and s_server.
320 Major changes between OpenSSL 0.9.5a and OpenSSL 0.9.6:
322 o Some documentation for BIO and SSL libraries.
323 o Enhanced chain verification using key identifiers.
324 o New sign and verify options to 'dgst' application.
325 o Support for DER and PEM encoded messages in 'smime' application.
326 o New 'rsautl' application, low level RSA utility.
328 o Bugfix for SSL rollback padding check.
329 o Support for external crypto devices [1].
330 o Enhanced EVP interface.
332 [1] The support for external crypto devices is currently a separate
333 distribution. See the file README.ENGINE.
335 Major changes between OpenSSL 0.9.5 and OpenSSL 0.9.5a:
337 o Bug fixes for Win32, SuSE Linux, NeXTSTEP and FreeBSD 2.2.8
338 o Shared library support for HPUX and Solaris-gcc
339 o Support of Linux/IA64
340 o Assembler support for Mingw32
341 o New 'rand' application
342 o New way to check for existence of algorithms from scripts
344 Major changes between OpenSSL 0.9.4 and OpenSSL 0.9.5:
346 o S/MIME support in new 'smime' command
347 o Documentation for the OpenSSL command line application
348 o Automation of 'req' application
349 o Fixes to make s_client, s_server work under Windows
350 o Support for multiple fieldnames in SPKACs
351 o New SPKAC command line utilty and associated library functions
352 o Options to allow passwords to be obtained from various sources
353 o New public key PEM format and options to handle it
354 o Many other fixes and enhancements to command line utilities
355 o Usable certificate chain verification
356 o Certificate purpose checking
357 o Certificate trust settings
358 o Support of authority information access extension
359 o Extensions in certificate requests
360 o Simplified X509 name and attribute routines
361 o Initial (incomplete) support for international character sets
362 o New DH_METHOD, DSA_METHOD and enhanced RSA_METHOD
363 o Read only memory BIOs and simplified creation function
364 o TLS/SSL protocol bugfixes: Accept TLS 'client hello' in SSL 3.0
365 record; allow fragmentation and interleaving of handshake and other
367 o TLS/SSL code now "tolerates" MS SGC
368 o Work around for Netscape client certificate hang bug
369 o RSA_NULL option that removes RSA patent code but keeps other
371 o Memory leak detection now allows applications to add extra information
372 via a per-thread stack
373 o PRNG robustness improved
375 o BIGNUM library bug fixes
376 o Faster DSA parameter generation
377 o Enhanced support for Alpha Linux
378 o Experimental MacOS support
380 Major changes between OpenSSL 0.9.3 and OpenSSL 0.9.4:
382 o Transparent support for PKCS#8 format private keys: these are used
383 by several software packages and are more secure than the standard
385 o PKCS#5 v2.0 implementation
386 o Password callbacks have a new void * argument for application data
387 o Avoid various memory leaks
388 o New pipe-like BIO that allows using the SSL library when actual I/O
389 must be handled by the application (BIO pair)
391 Major changes between OpenSSL 0.9.2b and OpenSSL 0.9.3:
392 o Lots of enhancements and cleanups to the Configuration mechanism
393 o RSA OEAP related fixes
394 o Added `openssl ca -revoke' option for revoking a certificate
395 o Source cleanups: const correctness, type-safe stacks and ASN.1 SETs
396 o Source tree cleanups: removed lots of obsolete files
397 o Thawte SXNet, certificate policies and CRL distribution points
399 o Preliminary (experimental) S/MIME support
400 o Support for ASN.1 UTF8String and VisibleString
401 o Full integration of PKCS#12 code
402 o Sparc assembler bignum implementation, optimized hash functions
403 o Option to disable selected ciphers
405 Major changes between OpenSSL 0.9.1c and OpenSSL 0.9.2b:
406 o Fixed a security hole related to session resumption
407 o Fixed RSA encryption routines for the p < q case
408 o "ALL" in cipher lists now means "everything except NULL ciphers"
409 o Support for Triple-DES CBCM cipher
410 o Support of Optimal Asymmetric Encryption Padding (OAEP) for RSA
411 o First support for new TLSv1 ciphers
412 o Added a few new BIOs (syslog BIO, reliable BIO)
413 o Extended support for DSA certificate/keys.
414 o Extended support for Certificate Signing Requests (CSR)
415 o Initial support for X.509v3 extensions
416 o Extended support for compression inside the SSL record layer
417 o Overhauled Win32 builds
418 o Cleanups and fixes to the Big Number (BN) library
419 o Support for ASN.1 GeneralizedTime
420 o Splitted ASN.1 SETs from SEQUENCEs
421 o ASN1 and PEM support for Netscape Certificate Sequences
422 o Overhauled Perl interface
423 o Lots of source tree cleanups.
424 o Lots of memory leak fixes.
427 Major changes between SSLeay 0.9.0b and OpenSSL 0.9.1c:
428 o Integration of the popular NO_RSA/NO_DSA patches
429 o Initial support for compression inside the SSL record layer
430 o Added BIO proxy and filtering functionality
431 o Extended Big Number (BN) library
432 o Added RIPE MD160 message digest
433 o Addeed support for RC2/64bit cipher
434 o Extended ASN.1 parser routines
435 o Adjustations of the source tree for CVS
436 o Support for various new platforms