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 0.9.8x and OpenSSL 0.9.8y:
10 o Fix OCSP bad key DoS attack CVE-2013-0166
12 Major changes between OpenSSL 0.9.8w and OpenSSL 0.9.8x:
14 o Fix DTLS record length checking bug CVE-2012-2333
16 Major changes between OpenSSL 0.9.8v and OpenSSL 0.9.8w:
18 o Fix for CVE-2012-2131 (corrected fix for 0.9.8 and CVE-2012-2110)
20 Major changes between OpenSSL 0.9.8u and OpenSSL 0.9.8v:
22 o Fix for ASN1 overflow bug CVE-2012-2110
24 Major changes between OpenSSL 0.9.8t and OpenSSL 0.9.8u:
26 o Fix for CMS/PKCS#7 MMA CVE-2012-0884
27 o Corrected fix for CVE-2011-4619
30 Major changes between OpenSSL 0.9.8s and OpenSSL 0.9.8t:
32 o Fix for DTLS DoS issue CVE-2012-0050
34 Major changes between OpenSSL 0.9.8r and OpenSSL 0.9.8s:
36 o Fix for DTLS plaintext recovery attack CVE-2011-4108
37 o Fix policy check double free error CVE-2011-4109
38 o Clear block padding bytes of SSL 3.0 records CVE-2011-4576
39 o Only allow one SGC handshake restart for SSL/TLS CVE-2011-4619
40 o Check for malformed RFC3779 data CVE-2011-4577
42 Major changes between OpenSSL 0.9.8q and OpenSSL 0.9.8r:
44 o Fix for security issue CVE-2011-0014
46 Major changes between OpenSSL 0.9.8p and OpenSSL 0.9.8q:
48 o Fix for security issue CVE-2010-4180
49 o Fix for CVE-2010-4252
51 Major changes between OpenSSL 0.9.8o and OpenSSL 0.9.8p:
53 o Fix for security issue CVE-2010-3864.
55 Major changes between OpenSSL 0.9.8n and OpenSSL 0.9.8o:
57 o Fix for security issue CVE-2010-0742.
59 o Recognise SHA2 certificates if only SSL algorithms added.
60 o Fix for no-rc4 compilation.
61 o Chil ENGINE unload workaround.
63 Major changes between OpenSSL 0.9.8m and OpenSSL 0.9.8n:
65 o CFB cipher definition fixes.
66 o Fix security issues CVE-2010-0740 and CVE-2010-0433.
68 Major changes between OpenSSL 0.9.8l and OpenSSL 0.9.8m:
70 o Cipher definition fixes.
71 o Workaround for slow RAND_poll() on some WIN32 versions.
72 o Remove MD2 from algorithm tables.
73 o SPKAC handling fixes.
74 o Support for RFC5746 TLS renegotiation extension.
75 o Compression memory leak fixed.
76 o Compression session resumption fixed.
77 o Ticket and SNI coexistence fixes.
78 o Many fixes to DTLS handling.
80 Major changes between OpenSSL 0.9.8k and OpenSSL 0.9.8l:
82 o Temporary work around for CVE-2009-3555: disable renegotiation.
84 Major changes between OpenSSL 0.9.8j and OpenSSL 0.9.8k:
86 o Fix various build issues.
87 o Fix security issues (CVE-2009-0590, CVE-2009-0591, CVE-2009-0789)
89 Major changes between OpenSSL 0.9.8i and OpenSSL 0.9.8j:
91 o Fix security issue (CVE-2008-5077)
92 o Merge FIPS 140-2 branch code.
94 Major changes between OpenSSL 0.9.8g and OpenSSL 0.9.8h:
96 o CryptoAPI ENGINE support.
97 o Various precautionary measures.
98 o Fix for bugs affecting certificate request creation.
99 o Support for local machine keyset attribute in PKCS#12 files.
101 Major changes between OpenSSL 0.9.8f and OpenSSL 0.9.8g:
103 o Backport of CMS functionality to 0.9.8.
104 o Fixes for bugs introduced with 0.9.8f.
106 Major changes between OpenSSL 0.9.8e and OpenSSL 0.9.8f:
108 o Add gcc 4.2 support.
109 o Add support for AES and SSE2 assembly lanugauge optimization
111 o Support for RFC4507bis and server name extensions if explicitly
112 selected at compile time.
114 o RFC4507bis support.
115 o TLS Extensions support.
117 Major changes between OpenSSL 0.9.8d and OpenSSL 0.9.8e:
119 o Various ciphersuite selection fixes.
122 Major changes between OpenSSL 0.9.8c and OpenSSL 0.9.8d:
124 o Introduce limits to prevent malicious key DoS (CVE-2006-2940)
125 o Fix security issues (CVE-2006-2937, CVE-2006-3737, CVE-2006-4343)
126 o Changes to ciphersuite selection algorithm
128 Major changes between OpenSSL 0.9.8b and OpenSSL 0.9.8c:
130 o Fix Daniel Bleichenbacher forged signature attack, CVE-2006-4339
131 o New cipher Camellia
133 Major changes between OpenSSL 0.9.8a and OpenSSL 0.9.8b:
135 o Cipher string fixes.
136 o Fixes for VC++ 2005.
137 o Updated ECC cipher suite support.
138 o New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free().
139 o Zlib compression usage fixes.
140 o Built in dynamic engine compilation support on Win32.
141 o Fixes auto dynamic engine loading in Win32.
143 Major changes between OpenSSL 0.9.8 and OpenSSL 0.9.8a:
145 o Fix potential SSL 2.0 rollback, CVE-2005-2969
146 o Extended Windows CE support
148 Major changes between OpenSSL 0.9.7g and OpenSSL 0.9.8:
150 o Major work on the BIGNUM library for higher efficiency and to
151 make operations more streamlined and less contradictory. This
152 is the result of a major audit of the BIGNUM library.
153 o Addition of BIGNUM functions for fields GF(2^m) and NIST
154 curves, to support the Elliptic Crypto functions.
155 o Major work on Elliptic Crypto; ECDH and ECDSA added, including
156 the use through EVP, X509 and ENGINE.
157 o New ASN.1 mini-compiler that's usable through the OpenSSL
159 o Added support for ASN.1 indefinite length constructed encoding.
160 o New PKCS#12 'medium level' API to manipulate PKCS#12 files.
161 o Complete rework of shared library construction and linking
162 programs with shared or static libraries, through a separate
164 o Rework of the passing of parameters from one Makefile to another.
165 o Changed ENGINE framework to load dynamic engine modules
166 automatically from specifically given directories.
167 o New structure and ASN.1 functions for CertificatePair.
168 o Changed the ZLIB compression method to be stateful.
169 o Changed the key-generation and primality testing "progress"
170 mechanism to take a structure that contains the ticker
171 function and an argument.
172 o New engine module: GMP (performs private key exponentiation).
173 o New engine module: VIA PadLOck ACE extension in VIA C3
175 o Added support for IPv6 addresses in certificate extensions.
176 See RFC 1884, section 2.2.
177 o Added support for certificate policy mappings, policy
178 constraints and name constraints.
179 o Added support for multi-valued AVAs in the OpenSSL
181 o Added support for multiple certificates with the same subject
182 in the 'openssl ca' index file.
183 o Make it possible to create self-signed certificates using
184 'openssl ca -selfsign'.
185 o Make it possible to generate a serial number file with
186 'openssl ca -create_serial'.
187 o New binary search functions with extended functionality.
189 o New STORE structure and library to provide an interface to all
190 sorts of data repositories. Supports storage of public and
191 private keys, certificates, CRLs, numbers and arbitrary blobs.
192 This library is unfortunately unfinished and unused withing
194 o New control functions for the error stack.
195 o Changed the PKCS#7 library to support one-pass S/MIME
197 o Added the possibility to compile without old deprecated
198 functionality with the OPENSSL_NO_DEPRECATED macro or the
199 'no-deprecated' argument to the config and Configure scripts.
200 o Constification of all ASN.1 conversion functions, and other
202 o Improved platform support for PowerPC.
203 o New FIPS 180-2 algorithms (SHA-224, -256, -384 and -512).
204 o New X509_VERIFY_PARAM structure to support parametrisation
205 of X.509 path validation.
206 o Major overhaul of RC4 performance on Intel P4, IA-64 and
208 o Changed the Configure script to have some algorithms disabled
209 by default. Those can be explicitely enabled with the new
210 argument form 'enable-xxx'.
211 o Change the default digest in 'openssl' commands from MD5 to
213 o Added support for DTLS.
214 o New BIGNUM blinding.
215 o Added support for the RSA-PSS encryption scheme
216 o Added support for the RSA X.931 padding.
217 o Added support for BSD sockets on NetWare.
218 o Added support for files larger than 2GB.
219 o Added initial support for Win64.
220 o Added alternate pkg-config files.
222 Major changes between OpenSSL 0.9.7l and OpenSSL 0.9.7m:
224 o FIPS 1.1.1 module linking.
225 o Various ciphersuite selection fixes.
227 Major changes between OpenSSL 0.9.7k and OpenSSL 0.9.7l:
229 o Introduce limits to prevent malicious key DoS (CVE-2006-2940)
230 o Fix security issues (CVE-2006-2937, CVE-2006-3737, CVE-2006-4343)
232 Major changes between OpenSSL 0.9.7j and OpenSSL 0.9.7k:
234 o Fix Daniel Bleichenbacher forged signature attack, CVE-2006-4339
236 Major changes between OpenSSL 0.9.7i and OpenSSL 0.9.7j:
238 o Visual C++ 2005 fixes.
239 o Update Windows build system for FIPS.
241 Major changes between OpenSSL 0.9.7h and OpenSSL 0.9.7i:
243 o Give EVP_MAX_MD_SIZE it's old value, except for a FIPS build.
245 Major changes between OpenSSL 0.9.7g and OpenSSL 0.9.7h:
247 o Fix SSL 2.0 Rollback, CVE-2005-2969
248 o Allow use of fixed-length exponent on DSA signing
249 o Default fixed-window RSA, DSA, DH private-key operations
251 Major changes between OpenSSL 0.9.7f and OpenSSL 0.9.7g:
253 o More compilation issues fixed.
254 o Adaptation to more modern Kerberos API.
255 o Enhanced or corrected configuration for Solaris64, Mingw and Cygwin.
256 o Enhanced x86_64 assembler BIGNUM module.
257 o More constification.
258 o Added processing of proxy certificates (RFC 3820).
260 Major changes between OpenSSL 0.9.7e and OpenSSL 0.9.7f:
262 o Several compilation issues fixed.
263 o Many memory allocation failure checks added.
264 o Improved comparison of X509 Name type.
265 o Mandatory basic checks on certificates.
266 o Performance improvements.
268 Major changes between OpenSSL 0.9.7d and OpenSSL 0.9.7e:
270 o Fix race condition in CRL checking code.
271 o Fixes to PKCS#7 (S/MIME) code.
273 Major changes between OpenSSL 0.9.7c and OpenSSL 0.9.7d:
275 o Security: Fix Kerberos ciphersuite SSL/TLS handshaking bug
276 o Security: Fix null-pointer assignment in do_change_cipher_spec()
277 o Allow multiple active certificates with same subject in CA index
278 o Multiple X509 verification fixes
279 o Speed up HMAC and other operations
281 Major changes between OpenSSL 0.9.7b and OpenSSL 0.9.7c:
283 o Security: fix various ASN1 parsing bugs.
284 o New -ignore_err option to OCSP utility.
285 o Various interop and bug fixes in S/MIME code.
286 o SSL/TLS protocol fix for unrequested client certificates.
288 Major changes between OpenSSL 0.9.7a and OpenSSL 0.9.7b:
290 o Security: counter the Klima-Pokorny-Rosa extension of
291 Bleichbacher's attack
292 o Security: make RSA blinding default.
293 o Configuration: Irix fixes, AIX fixes, better mingw support.
294 o Support for new platforms: linux-ia64-ecc.
295 o Build: shared library support fixes.
296 o ASN.1: treat domainComponent correctly.
297 o Documentation: fixes and additions.
299 Major changes between OpenSSL 0.9.7 and OpenSSL 0.9.7a:
301 o Security: Important security related bugfixes.
302 o Enhanced compatibility with MIT Kerberos.
303 o Can be built without the ENGINE framework.
304 o IA32 assembler enhancements.
305 o Support for new platforms: FreeBSD/IA64 and FreeBSD/Sparc64.
306 o Configuration: the no-err option now works properly.
307 o SSL/TLS: now handles manual certificate chain building.
308 o SSL/TLS: certain session ID malfunctions corrected.
310 Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.7:
312 o New library section OCSP.
313 o Complete rewrite of ASN1 code.
314 o CRL checking in verify code and openssl utility.
315 o Extension copying in 'ca' utility.
316 o Flexible display options in 'ca' utility.
317 o Provisional support for international characters with UTF8.
318 o Support for external crypto devices ('engine') is no longer
319 a separate distribution.
320 o New elliptic curve library section.
321 o New AES (Rijndael) library section.
322 o Support for new platforms: Windows CE, Tandem OSS, A/UX, AIX 64-bit,
323 Linux x86_64, Linux 64-bit on Sparc v9
324 o Extended support for some platforms: VxWorks
325 o Enhanced support for shared libraries.
326 o Now only builds PIC code when shared library support is requested.
327 o Support for pkg-config.
328 o Lots of new manuals.
329 o Makes symbolic links to or copies of manuals to cover all described
331 o Change DES API to clean up the namespace (some applications link also
332 against libdes providing similar functions having the same name).
333 Provide macros for backward compatibility (will be removed in the
335 o Unify handling of cryptographic algorithms (software and engine)
336 to be available via EVP routines for asymmetric and symmetric ciphers.
337 o NCONF: new configuration handling routines.
338 o Change API to use more 'const' modifiers to improve error checking
340 o Finally remove references to RSAref.
341 o Reworked parts of the BIGNUM code.
342 o Support for new engines: Broadcom ubsec, Accelerated Encryption
343 Processing, IBM 4758.
344 o A few new engines added in the demos area.
345 o Extended and corrected OID (object identifier) table.
346 o PRNG: query at more locations for a random device, automatic query for
347 EGD style random sources at several locations.
348 o SSL/TLS: allow optional cipher choice according to server's preference.
349 o SSL/TLS: allow server to explicitly set new session ids.
350 o SSL/TLS: support Kerberos cipher suites (RFC2712).
351 Only supports MIT Kerberos for now.
352 o SSL/TLS: allow more precise control of renegotiations and sessions.
353 o SSL/TLS: add callback to retrieve SSL/TLS messages.
354 o SSL/TLS: support AES cipher suites (RFC3268).
356 Major changes between OpenSSL 0.9.6j and OpenSSL 0.9.6k:
358 o Security: fix various ASN1 parsing bugs.
359 o SSL/TLS protocol fix for unrequested client certificates.
361 Major changes between OpenSSL 0.9.6i and OpenSSL 0.9.6j:
363 o Security: counter the Klima-Pokorny-Rosa extension of
364 Bleichbacher's attack
365 o Security: make RSA blinding default.
366 o Build: shared library support fixes.
368 Major changes between OpenSSL 0.9.6h and OpenSSL 0.9.6i:
370 o Important security related bugfixes.
372 Major changes between OpenSSL 0.9.6g and OpenSSL 0.9.6h:
374 o New configuration targets for Tandem OSS and A/UX.
375 o New OIDs for Microsoft attributes.
376 o Better handling of SSL session caching.
377 o Better comparison of distinguished names.
378 o Better handling of shared libraries in a mixed GNU/non-GNU environment.
379 o Support assembler code with Borland C.
380 o Fixes for length problems.
381 o Fixes for uninitialised variables.
382 o Fixes for memory leaks, some unusual crashes and some race conditions.
383 o Fixes for smaller building problems.
384 o Updates of manuals, FAQ and other instructive documents.
386 Major changes between OpenSSL 0.9.6f and OpenSSL 0.9.6g:
388 o Important building fixes on Unix.
390 Major changes between OpenSSL 0.9.6e and OpenSSL 0.9.6f:
392 o Various important bugfixes.
394 Major changes between OpenSSL 0.9.6d and OpenSSL 0.9.6e:
396 o Important security related bugfixes.
397 o Various SSL/TLS library bugfixes.
399 Major changes between OpenSSL 0.9.6c and OpenSSL 0.9.6d:
401 o Various SSL/TLS library bugfixes.
402 o Fix DH parameter generation for 'non-standard' generators.
404 Major changes between OpenSSL 0.9.6b and OpenSSL 0.9.6c:
406 o Various SSL/TLS library bugfixes.
407 o BIGNUM library fixes.
408 o RSA OAEP and random number generation fixes.
409 o Object identifiers corrected and added.
410 o Add assembler BN routines for IA64.
411 o Add support for OS/390 Unix, UnixWare with gcc, OpenUNIX 8,
412 MIPS Linux; shared library support for Irix, HP-UX.
413 o Add crypto accelerator support for AEP, Baltimore SureWare,
414 Broadcom and Cryptographic Appliance's keyserver
415 [in 0.9.6c-engine release].
417 Major changes between OpenSSL 0.9.6a and OpenSSL 0.9.6b:
419 o Security fix: PRNG improvements.
420 o Security fix: RSA OAEP check.
421 o Security fix: Reinsert and fix countermeasure to Bleichbacher's
423 o MIPS bug fix in BIGNUM.
424 o Bug fix in "openssl enc".
425 o Bug fix in X.509 printing routine.
426 o Bug fix in DSA verification routine and DSA S/MIME verification.
427 o Bug fix to make PRNG thread-safe.
428 o Bug fix in RAND_file_name().
429 o Bug fix in compatibility mode trust settings.
430 o Bug fix in blowfish EVP.
431 o Increase default size for BIO buffering filter.
432 o Compatibility fixes in some scripts.
434 Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.6a:
436 o Security fix: change behavior of OpenSSL to avoid using
437 environment variables when running as root.
438 o Security fix: check the result of RSA-CRT to reduce the
439 possibility of deducing the private key from an incorrectly
440 calculated signature.
441 o Security fix: prevent Bleichenbacher's DSA attack.
442 o Security fix: Zero the premaster secret after deriving the
443 master secret in DH ciphersuites.
444 o Reimplement SSL_peek(), which had various problems.
445 o Compatibility fix: the function des_encrypt() renamed to
446 des_encrypt1() to avoid clashes with some Unixen libc.
447 o Bug fixes for Win32, HP/UX and Irix.
448 o Bug fixes in BIGNUM, SSL, PKCS#7, PKCS#12, X.509, CONF and
449 memory checking routines.
450 o Bug fixes for RSA operations in threaded environments.
451 o Bug fixes in misc. openssl applications.
452 o Remove a few potential memory leaks.
453 o Add tighter checks of BIGNUM routines.
454 o Shared library support has been reworked for generality.
455 o More documentation.
456 o New function BN_rand_range().
457 o Add "-rand" option to openssl s_client and s_server.
459 Major changes between OpenSSL 0.9.5a and OpenSSL 0.9.6:
461 o Some documentation for BIO and SSL libraries.
462 o Enhanced chain verification using key identifiers.
463 o New sign and verify options to 'dgst' application.
464 o Support for DER and PEM encoded messages in 'smime' application.
465 o New 'rsautl' application, low level RSA utility.
467 o Bugfix for SSL rollback padding check.
468 o Support for external crypto devices [1].
469 o Enhanced EVP interface.
471 [1] The support for external crypto devices is currently a separate
472 distribution. See the file README.ENGINE.
474 Major changes between OpenSSL 0.9.5 and OpenSSL 0.9.5a:
476 o Bug fixes for Win32, SuSE Linux, NeXTSTEP and FreeBSD 2.2.8
477 o Shared library support for HPUX and Solaris-gcc
478 o Support of Linux/IA64
479 o Assembler support for Mingw32
480 o New 'rand' application
481 o New way to check for existence of algorithms from scripts
483 Major changes between OpenSSL 0.9.4 and OpenSSL 0.9.5:
485 o S/MIME support in new 'smime' command
486 o Documentation for the OpenSSL command line application
487 o Automation of 'req' application
488 o Fixes to make s_client, s_server work under Windows
489 o Support for multiple fieldnames in SPKACs
490 o New SPKAC command line utilty and associated library functions
491 o Options to allow passwords to be obtained from various sources
492 o New public key PEM format and options to handle it
493 o Many other fixes and enhancements to command line utilities
494 o Usable certificate chain verification
495 o Certificate purpose checking
496 o Certificate trust settings
497 o Support of authority information access extension
498 o Extensions in certificate requests
499 o Simplified X509 name and attribute routines
500 o Initial (incomplete) support for international character sets
501 o New DH_METHOD, DSA_METHOD and enhanced RSA_METHOD
502 o Read only memory BIOs and simplified creation function
503 o TLS/SSL protocol bugfixes: Accept TLS 'client hello' in SSL 3.0
504 record; allow fragmentation and interleaving of handshake and other
506 o TLS/SSL code now "tolerates" MS SGC
507 o Work around for Netscape client certificate hang bug
508 o RSA_NULL option that removes RSA patent code but keeps other
510 o Memory leak detection now allows applications to add extra information
511 via a per-thread stack
512 o PRNG robustness improved
514 o BIGNUM library bug fixes
515 o Faster DSA parameter generation
516 o Enhanced support for Alpha Linux
517 o Experimental MacOS support
519 Major changes between OpenSSL 0.9.3 and OpenSSL 0.9.4:
521 o Transparent support for PKCS#8 format private keys: these are used
522 by several software packages and are more secure than the standard
524 o PKCS#5 v2.0 implementation
525 o Password callbacks have a new void * argument for application data
526 o Avoid various memory leaks
527 o New pipe-like BIO that allows using the SSL library when actual I/O
528 must be handled by the application (BIO pair)
530 Major changes between OpenSSL 0.9.2b and OpenSSL 0.9.3:
531 o Lots of enhancements and cleanups to the Configuration mechanism
532 o RSA OEAP related fixes
533 o Added `openssl ca -revoke' option for revoking a certificate
534 o Source cleanups: const correctness, type-safe stacks and ASN.1 SETs
535 o Source tree cleanups: removed lots of obsolete files
536 o Thawte SXNet, certificate policies and CRL distribution points
538 o Preliminary (experimental) S/MIME support
539 o Support for ASN.1 UTF8String and VisibleString
540 o Full integration of PKCS#12 code
541 o Sparc assembler bignum implementation, optimized hash functions
542 o Option to disable selected ciphers
544 Major changes between OpenSSL 0.9.1c and OpenSSL 0.9.2b:
545 o Fixed a security hole related to session resumption
546 o Fixed RSA encryption routines for the p < q case
547 o "ALL" in cipher lists now means "everything except NULL ciphers"
548 o Support for Triple-DES CBCM cipher
549 o Support of Optimal Asymmetric Encryption Padding (OAEP) for RSA
550 o First support for new TLSv1 ciphers
551 o Added a few new BIOs (syslog BIO, reliable BIO)
552 o Extended support for DSA certificate/keys.
553 o Extended support for Certificate Signing Requests (CSR)
554 o Initial support for X.509v3 extensions
555 o Extended support for compression inside the SSL record layer
556 o Overhauled Win32 builds
557 o Cleanups and fixes to the Big Number (BN) library
558 o Support for ASN.1 GeneralizedTime
559 o Splitted ASN.1 SETs from SEQUENCEs
560 o ASN1 and PEM support for Netscape Certificate Sequences
561 o Overhauled Perl interface
562 o Lots of source tree cleanups.
563 o Lots of memory leak fixes.
566 Major changes between SSLeay 0.9.0b and OpenSSL 0.9.1c:
567 o Integration of the popular NO_RSA/NO_DSA patches
568 o Initial support for compression inside the SSL record layer
569 o Added BIO proxy and filtering functionality
570 o Extended Big Number (BN) library
571 o Added RIPE MD160 message digest
572 o Addeed support for RC2/64bit cipher
573 o Extended ASN.1 parser routines
574 o Adjustations of the source tree for CVS
575 o Support for various new platforms