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