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 1.1.1r and OpenSSL 1.1.1s [1 Nov 2022]
10 o Fixed a regression introduced in OpenSSL 1.1.1r not refreshing the
11 certificate data to be signed before signing the certificate.
13 Major changes between OpenSSL 1.1.1q and OpenSSL 1.1.1r [11 Oct 2022]
15 o Added a missing header for memcmp that caused compilation failure on
18 Major changes between OpenSSL 1.1.1p and OpenSSL 1.1.1q [5 Jul 2022]
20 o Fixed AES OCB failure to encrypt some bytes on 32-bit x86 platforms
23 Major changes between OpenSSL 1.1.1o and OpenSSL 1.1.1p [21 Jun 2022]
25 o Fixed additional bugs in the c_rehash script which was not properly
26 sanitising shell metacharacters to prevent command injection
29 Major changes between OpenSSL 1.1.1n and OpenSSL 1.1.1o [3 May 2022]
31 o Fixed a bug in the c_rehash script which was not properly sanitising
32 shell metacharacters to prevent command injection (CVE-2022-1292)
34 Major changes between OpenSSL 1.1.1m and OpenSSL 1.1.1n [15 Mar 2022]
36 o Fixed a bug in the BN_mod_sqrt() function that can cause it to loop
37 forever for non-prime moduli (CVE-2022-0778)
39 Major changes between OpenSSL 1.1.1l and OpenSSL 1.1.1m [14 Dec 2021]
43 Major changes between OpenSSL 1.1.1k and OpenSSL 1.1.1l [24 Aug 2021]
45 o Fixed an SM2 Decryption Buffer Overflow (CVE-2021-3711)
46 o Fixed various read buffer overruns processing ASN.1 strings (CVE-2021-3712)
48 Major changes between OpenSSL 1.1.1j and OpenSSL 1.1.1k [25 Mar 2021]
50 o Fixed a problem with verifying a certificate chain when using the
51 X509_V_FLAG_X509_STRICT flag (CVE-2021-3450)
52 o Fixed an issue where an OpenSSL TLS server may crash if sent a
53 maliciously crafted renegotiation ClientHello message from a client
56 Major changes between OpenSSL 1.1.1i and OpenSSL 1.1.1j [16 Feb 2021]
58 o Fixed a NULL pointer deref in the X509_issuer_and_serial_hash()
59 function (CVE-2021-23841)
60 o Fixed the RSA_padding_check_SSLv23() function and the RSA_SSLV23_PADDING
61 padding mode to correctly check for rollback attacks
62 o Fixed an overflow in the EVP_CipherUpdate, EVP_EncryptUpdate and
63 EVP_DecryptUpdate functions (CVE-2021-23840)
64 o Fixed SRP_Calc_client_key so that it runs in constant time
66 Major changes between OpenSSL 1.1.1h and OpenSSL 1.1.1i [8 Dec 2020]
68 o Fixed NULL pointer deref in GENERAL_NAME_cmp (CVE-2020-1971)
70 Major changes between OpenSSL 1.1.1g and OpenSSL 1.1.1h [22 Sep 2020]
72 o Disallow explicit curve parameters in verifications chains when
73 X509_V_FLAG_X509_STRICT is used
74 o Enable 'MinProtocol' and 'MaxProtocol' to configure both TLS and DTLS
76 o Oracle Developer Studio will start reporting deprecation warnings
78 Major changes between OpenSSL 1.1.1f and OpenSSL 1.1.1g [21 Apr 2020]
80 o Fixed segmentation fault in SSL_check_chain() (CVE-2020-1967)
82 Major changes between OpenSSL 1.1.1e and OpenSSL 1.1.1f [31 Mar 2020]
84 o Revert the unexpected EOF reporting via SSL_ERROR_SSL
86 Major changes between OpenSSL 1.1.1d and OpenSSL 1.1.1e [17 Mar 2020]
88 o Fixed an overflow bug in the x64_64 Montgomery squaring procedure
89 used in exponentiation with 512-bit moduli (CVE-2019-1551)
90 o Properly detect unexpected EOF while reading in libssl and report
93 Major changes between OpenSSL 1.1.1c and OpenSSL 1.1.1d [10 Sep 2019]
95 o Fixed a fork protection issue (CVE-2019-1549)
96 o Fixed a padding oracle in PKCS7_dataDecode and CMS_decrypt_set1_pkey
98 o For built-in EC curves, ensure an EC_GROUP built from the curve name is
99 used even when parsing explicit parameters
100 o Compute ECC cofactors if not provided during EC_GROUP construction
102 o Early start up entropy quality from the DEVRANDOM seed source has been
103 improved for older Linux systems
104 o Correct the extended master secret constant on EBCDIC systems
105 o Use Windows installation paths in the mingw builds (CVE-2019-1552)
106 o Changed DH_check to accept parameters with order q and 2q subgroups
107 o Significantly reduce secure memory usage by the randomness pools
108 o Revert the DEVRANDOM_WAIT feature for Linux systems
110 Major changes between OpenSSL 1.1.1b and OpenSSL 1.1.1c [28 May 2019]
112 o Prevent over long nonces in ChaCha20-Poly1305 (CVE-2019-1543)
114 Major changes between OpenSSL 1.1.1a and OpenSSL 1.1.1b [26 Feb 2019]
116 o Change the info callback signals for the start and end of a post-handshake
117 message exchange in TLSv1.3.
118 o Fix a bug in DTLS over SCTP. This breaks interoperability with older versions
119 of OpenSSL like OpenSSL 1.1.0 and OpenSSL 1.0.2.
121 Major changes between OpenSSL 1.1.1 and OpenSSL 1.1.1a [20 Nov 2018]
123 o Timing vulnerability in DSA signature generation (CVE-2018-0734)
124 o Timing vulnerability in ECDSA signature generation (CVE-2018-0735)
126 Major changes between OpenSSL 1.1.0i and OpenSSL 1.1.1 [11 Sep 2018]
128 o Support for TLSv1.3 added (see https://wiki.openssl.org/index.php/TLS1.3
129 for further important information). The TLSv1.3 implementation includes:
130 o Fully compliant implementation of RFC8446 (TLSv1.3) on by default
132 o Post-handshake authentication and key update
133 o Middlebox Compatibility Mode
135 o Support for all five RFC8446 ciphersuites
136 o RSA-PSS signature algorithms (backported to TLSv1.2)
137 o Configurable session ticket support
138 o Stateless server support
139 o Rewrite of the packet construction code for "safer" packet handling
140 o Rewrite of the extension handling code
141 o Complete rewrite of the OpenSSL random number generator to introduce the
142 following capabilities
143 o The default RAND method now utilizes an AES-CTR DRBG according to
144 NIST standard SP 800-90Ar1.
145 o Support for multiple DRBG instances with seed chaining.
146 o There is a public and private DRBG instance.
147 o The DRBG instances are fork-safe.
148 o Keep all global DRBG instances on the secure heap if it is enabled.
149 o The public and private DRBG instance are per thread for lock free
151 o Support for various new cryptographic algorithms including:
153 o SHA512/224 and SHA512/256
154 o EdDSA (both Ed25519 and Ed448) including X509 and TLS support
155 o X448 (adding to the existing X25519 support in 1.1.0)
161 o ARIA (including TLS support)
162 o Significant Side-Channel attack security improvements
163 o Add a new ClientHello callback to provide the ability to adjust the SSL
164 object at an early stage.
165 o Add 'Maximum Fragment Length' TLS extension negotiation and support
166 o A new STORE module, which implements a uniform and URI based reader of
167 stores that can contain keys, certificates, CRLs and numerous other
169 o Move the display of configuration data to configdata.pm.
170 o Allow GNU style "make variables" to be used with Configure.
171 o Claim the namespaces OSSL and OPENSSL, represented as symbol prefixes
172 o Rewrite of devcrypto engine
174 Major changes between OpenSSL 1.1.0h and OpenSSL 1.1.0i [under development]
176 o Client DoS due to large DH parameter (CVE-2018-0732)
177 o Cache timing vulnerability in RSA Key Generation (CVE-2018-0737)
179 Major changes between OpenSSL 1.1.0g and OpenSSL 1.1.0h [under development]
181 o Constructed ASN.1 types with a recursive definition could exceed the
182 stack (CVE-2018-0739)
183 o Incorrect CRYPTO_memcmp on HP-UX PA-RISC (CVE-2018-0733)
184 o rsaz_1024_mul_avx2 overflow bug on x86_64 (CVE-2017-3738)
186 Major changes between OpenSSL 1.1.0f and OpenSSL 1.1.0g [2 Nov 2017]
188 o bn_sqrx8x_internal carry bug on x86_64 (CVE-2017-3736)
189 o Malformed X.509 IPAddressFamily could cause OOB read (CVE-2017-3735)
191 Major changes between OpenSSL 1.1.0e and OpenSSL 1.1.0f [25 May 2017]
193 o config now recognises 64-bit mingw and chooses mingw64 instead of mingw
195 Major changes between OpenSSL 1.1.0d and OpenSSL 1.1.0e [16 Feb 2017]
197 o Encrypt-Then-Mac renegotiation crash (CVE-2017-3733)
199 Major changes between OpenSSL 1.1.0c and OpenSSL 1.1.0d [26 Jan 2017]
201 o Truncated packet could crash via OOB read (CVE-2017-3731)
202 o Bad (EC)DHE parameters cause a client crash (CVE-2017-3730)
203 o BN_mod_exp may produce incorrect results on x86_64 (CVE-2017-3732)
205 Major changes between OpenSSL 1.1.0b and OpenSSL 1.1.0c [10 Nov 2016]
207 o ChaCha20/Poly1305 heap-buffer-overflow (CVE-2016-7054)
208 o CMS Null dereference (CVE-2016-7053)
209 o Montgomery multiplication may produce incorrect results (CVE-2016-7055)
211 Major changes between OpenSSL 1.1.0a and OpenSSL 1.1.0b [26 Sep 2016]
213 o Fix Use After Free for large message sizes (CVE-2016-6309)
215 Major changes between OpenSSL 1.1.0 and OpenSSL 1.1.0a [22 Sep 2016]
217 o OCSP Status Request extension unbounded memory growth (CVE-2016-6304)
218 o SSL_peek() hang on empty record (CVE-2016-6305)
219 o Excessive allocation of memory in tls_get_message_header()
221 o Excessive allocation of memory in dtls1_preprocess_fragment()
224 Major changes between OpenSSL 1.0.2h and OpenSSL 1.1.0 [25 Aug 2016]
226 o Copyright text was shrunk to a boilerplate that points to the license
227 o "shared" builds are now the default when possible
228 o Added support for "pipelining"
229 o Added the AFALG engine
230 o New threading API implemented
231 o Support for ChaCha20 and Poly1305 added to libcrypto and libssl
232 o Support for extended master secret
234 o Reworked test suite, now based on perl, Test::Harness and Test::More
235 o *Most* libcrypto and libssl public structures were made opaque,
237 BIGNUM and associated types, EC_KEY and EC_KEY_METHOD,
238 DH and DH_METHOD, DSA and DSA_METHOD, RSA and RSA_METHOD,
239 BIO and BIO_METHOD, EVP_MD_CTX, EVP_MD, EVP_CIPHER_CTX,
240 EVP_CIPHER, EVP_PKEY and associated types, HMAC_CTX,
241 X509, X509_CRL, X509_OBJECT, X509_STORE_CTX, X509_STORE,
242 X509_LOOKUP, X509_LOOKUP_METHOD
243 o libssl internal structures made opaque
244 o SSLv2 support removed
245 o Kerberos ciphersuite support removed
246 o RC4 removed from DEFAULT ciphersuites in libssl
247 o 40 and 56 bit cipher support removed from libssl
248 o All public header files moved to include/openssl, no more symlinking
249 o SSL/TLS state machine, version negotiation and record layer rewritten
250 o EC revision: now operations use new EC_KEY_METHOD.
251 o Support for OCB mode added to libcrypto
252 o Support for asynchronous crypto operations added to libcrypto and libssl
253 o Deprecated interfaces can now be disabled at build time either
254 relative to the latest release via the "no-deprecated" Configure
255 argument, or via the "--api=1.1.0|1.0.0|0.9.8" option.
256 o Application software can be compiled with -DOPENSSL_API_COMPAT=version
257 to ensure that features deprecated in that version are not exposed.
258 o Support for RFC6698/RFC7671 DANE TLSA peer authentication
259 o Change of Configure to use --prefix as the main installation
260 directory location rather than --openssldir. The latter becomes
261 the directory for certs, private key and openssl.cnf exclusively.
262 o Reworked BIO networking library, with full support for IPv6.
263 o New "unified" build system
264 o New security levels
265 o Support for scrypt algorithm
267 o Extended SSL_CONF support using configuration files
268 o KDF algorithm support. Implement TLS PRF as a KDF.
269 o Support for Certificate Transparency
272 Major changes between OpenSSL 1.0.2g and OpenSSL 1.0.2h [3 May 2016]
274 o Prevent padding oracle in AES-NI CBC MAC check (CVE-2016-2107)
275 o Fix EVP_EncodeUpdate overflow (CVE-2016-2105)
276 o Fix EVP_EncryptUpdate overflow (CVE-2016-2106)
277 o Prevent ASN.1 BIO excessive memory allocation (CVE-2016-2109)
278 o EBCDIC overread (CVE-2016-2176)
279 o Modify behavior of ALPN to invoke callback after SNI/servername
280 callback, such that updates to the SSL_CTX affect ALPN.
281 o Remove LOW from the DEFAULT cipher list. This removes singles DES from
283 o Only remove the SSLv2 methods with the no-ssl2-method option.
285 Major changes between OpenSSL 1.0.2f and OpenSSL 1.0.2g [1 Mar 2016]
287 o Disable weak ciphers in SSLv3 and up in default builds of OpenSSL.
288 o Disable SSLv2 default build, default negotiation and weak ciphers
290 o Fix a double-free in DSA code (CVE-2016-0705)
291 o Disable SRP fake user seed to address a server memory leak
293 o Fix BN_hex2bn/BN_dec2bn NULL pointer deref/heap corruption
295 o Fix memory issues in BIO_*printf functions (CVE-2016-0799)
296 o Fix side channel attack on modular exponentiation (CVE-2016-0702)
298 Major changes between OpenSSL 1.0.2e and OpenSSL 1.0.2f [28 Jan 2016]
300 o DH small subgroups (CVE-2016-0701)
301 o SSLv2 doesn't block disabled ciphers (CVE-2015-3197)
303 Major changes between OpenSSL 1.0.2d and OpenSSL 1.0.2e [3 Dec 2015]
305 o BN_mod_exp may produce incorrect results on x86_64 (CVE-2015-3193)
306 o Certificate verify crash with missing PSS parameter (CVE-2015-3194)
307 o X509_ATTRIBUTE memory leak (CVE-2015-3195)
308 o Rewrite EVP_DecodeUpdate (base64 decoding) to fix several bugs
309 o In DSA_generate_parameters_ex, if the provided seed is too short,
312 Major changes between OpenSSL 1.0.2c and OpenSSL 1.0.2d [9 Jul 2015]
314 o Alternate chains certificate forgery (CVE-2015-1793)
315 o Race condition handling PSK identify hint (CVE-2015-3196)
317 Major changes between OpenSSL 1.0.2b and OpenSSL 1.0.2c [12 Jun 2015]
319 o Fix HMAC ABI incompatibility
321 Major changes between OpenSSL 1.0.2a and OpenSSL 1.0.2b [11 Jun 2015]
323 o Malformed ECParameters causes infinite loop (CVE-2015-1788)
324 o Exploitable out-of-bounds read in X509_cmp_time (CVE-2015-1789)
325 o PKCS7 crash with missing EnvelopedContent (CVE-2015-1790)
326 o CMS verify infinite loop with unknown hash function (CVE-2015-1792)
327 o Race condition handling NewSessionTicket (CVE-2015-1791)
329 Major changes between OpenSSL 1.0.2 and OpenSSL 1.0.2a [19 Mar 2015]
331 o OpenSSL 1.0.2 ClientHello sigalgs DoS fix (CVE-2015-0291)
332 o Multiblock corrupted pointer fix (CVE-2015-0290)
333 o Segmentation fault in DTLSv1_listen fix (CVE-2015-0207)
334 o Segmentation fault in ASN1_TYPE_cmp fix (CVE-2015-0286)
335 o Segmentation fault for invalid PSS parameters fix (CVE-2015-0208)
336 o ASN.1 structure reuse memory corruption fix (CVE-2015-0287)
337 o PKCS7 NULL pointer dereferences fix (CVE-2015-0289)
338 o DoS via reachable assert in SSLv2 servers fix (CVE-2015-0293)
339 o Empty CKE with client auth and DHE fix (CVE-2015-1787)
340 o Handshake with unseeded PRNG fix (CVE-2015-0285)
341 o Use After Free following d2i_ECPrivatekey error fix (CVE-2015-0209)
342 o X509_to_X509_REQ NULL pointer deref fix (CVE-2015-0288)
343 o Removed the export ciphers from the DEFAULT ciphers
345 Major changes between OpenSSL 1.0.1l and OpenSSL 1.0.2 [22 Jan 2015]:
347 o Suite B support for TLS 1.2 and DTLS 1.2
348 o Support for DTLS 1.2
349 o TLS automatic EC curve selection.
350 o API to set TLS supported signature algorithms and curves
351 o SSL_CONF configuration API.
352 o TLS Brainpool support.
354 o CMS support for RSA-PSS, RSA-OAEP, ECDH and X9.42 DH.
356 Major changes between OpenSSL 1.0.1k and OpenSSL 1.0.1l [15 Jan 2015]
358 o Build fixes for the Windows and OpenVMS platforms
360 Major changes between OpenSSL 1.0.1j and OpenSSL 1.0.1k [8 Jan 2015]
362 o Fix for CVE-2014-3571
363 o Fix for CVE-2015-0206
364 o Fix for CVE-2014-3569
365 o Fix for CVE-2014-3572
366 o Fix for CVE-2015-0204
367 o Fix for CVE-2015-0205
368 o Fix for CVE-2014-8275
369 o Fix for CVE-2014-3570
371 Major changes between OpenSSL 1.0.1i and OpenSSL 1.0.1j [15 Oct 2014]
373 o Fix for CVE-2014-3513
374 o Fix for CVE-2014-3567
375 o Mitigation for CVE-2014-3566 (SSL protocol vulnerability)
376 o Fix for CVE-2014-3568
378 Major changes between OpenSSL 1.0.1h and OpenSSL 1.0.1i [6 Aug 2014]
380 o Fix for CVE-2014-3512
381 o Fix for CVE-2014-3511
382 o Fix for CVE-2014-3510
383 o Fix for CVE-2014-3507
384 o Fix for CVE-2014-3506
385 o Fix for CVE-2014-3505
386 o Fix for CVE-2014-3509
387 o Fix for CVE-2014-5139
388 o Fix for CVE-2014-3508
390 Major changes between OpenSSL 1.0.1g and OpenSSL 1.0.1h [5 Jun 2014]
392 o Fix for CVE-2014-0224
393 o Fix for CVE-2014-0221
394 o Fix for CVE-2014-0198
395 o Fix for CVE-2014-0195
396 o Fix for CVE-2014-3470
397 o Fix for CVE-2010-5298
399 Major changes between OpenSSL 1.0.1f and OpenSSL 1.0.1g [7 Apr 2014]
401 o Fix for CVE-2014-0160
402 o Add TLS padding extension workaround for broken servers.
403 o Fix for CVE-2014-0076
405 Major changes between OpenSSL 1.0.1e and OpenSSL 1.0.1f [6 Jan 2014]
407 o Don't include gmt_unix_time in TLS server and client random values
408 o Fix for TLS record tampering bug CVE-2013-4353
409 o Fix for TLS version checking bug CVE-2013-6449
410 o Fix for DTLS retransmission bug CVE-2013-6450
412 Major changes between OpenSSL 1.0.1d and OpenSSL 1.0.1e [11 Feb 2013]:
414 o Corrected fix for CVE-2013-0169
416 Major changes between OpenSSL 1.0.1c and OpenSSL 1.0.1d [4 Feb 2013]:
418 o Fix renegotiation in TLS 1.1, 1.2 by using the correct TLS version.
419 o Include the fips configuration module.
420 o Fix OCSP bad key DoS attack CVE-2013-0166
421 o Fix for SSL/TLS/DTLS CBC plaintext recovery attack CVE-2013-0169
422 o Fix for TLS AESNI record handling flaw CVE-2012-2686
424 Major changes between OpenSSL 1.0.1b and OpenSSL 1.0.1c [10 May 2012]:
426 o Fix TLS/DTLS record length checking bug CVE-2012-2333
427 o Don't attempt to use non-FIPS composite ciphers in FIPS mode.
429 Major changes between OpenSSL 1.0.1a and OpenSSL 1.0.1b [26 Apr 2012]:
431 o Fix compilation error on non-x86 platforms.
432 o Make FIPS capable OpenSSL ciphers work in non-FIPS mode.
433 o Fix SSL_OP_NO_TLSv1_1 clash with SSL_OP_ALL in OpenSSL 1.0.0
435 Major changes between OpenSSL 1.0.1 and OpenSSL 1.0.1a [19 Apr 2012]:
437 o Fix for ASN1 overflow bug CVE-2012-2110
438 o Workarounds for some servers that hang on long client hellos.
439 o Fix SEGV in AES code.
441 Major changes between OpenSSL 1.0.0h and OpenSSL 1.0.1 [14 Mar 2012]:
443 o TLS/DTLS heartbeat support.
445 o RFC 5705 TLS key material exporter.
446 o RFC 5764 DTLS-SRTP negotiation.
447 o Next Protocol Negotiation.
448 o PSS signatures in certificates, requests and CRLs.
449 o Support for password based recipient info for CMS.
450 o Support TLS v1.2 and TLS v1.1.
451 o Preliminary FIPS capability for unvalidated 2.0 FIPS module.
454 Major changes between OpenSSL 1.0.0g and OpenSSL 1.0.0h [12 Mar 2012]:
456 o Fix for CMS/PKCS#7 MMA CVE-2012-0884
457 o Corrected fix for CVE-2011-4619
458 o Various DTLS fixes.
460 Major changes between OpenSSL 1.0.0f and OpenSSL 1.0.0g [18 Jan 2012]:
462 o Fix for DTLS DoS issue CVE-2012-0050
464 Major changes between OpenSSL 1.0.0e and OpenSSL 1.0.0f [4 Jan 2012]:
466 o Fix for DTLS plaintext recovery attack CVE-2011-4108
467 o Clear block padding bytes of SSL 3.0 records CVE-2011-4576
468 o Only allow one SGC handshake restart for SSL/TLS CVE-2011-4619
469 o Check parameters are not NULL in GOST ENGINE CVE-2012-0027
470 o Check for malformed RFC3779 data CVE-2011-4577
472 Major changes between OpenSSL 1.0.0d and OpenSSL 1.0.0e [6 Sep 2011]:
474 o Fix for CRL vulnerability issue CVE-2011-3207
475 o Fix for ECDH crashes CVE-2011-3210
476 o Protection against EC timing attacks.
477 o Support ECDH ciphersuites for certificates using SHA2 algorithms.
478 o Various DTLS fixes.
480 Major changes between OpenSSL 1.0.0c and OpenSSL 1.0.0d [8 Feb 2011]:
482 o Fix for security issue CVE-2011-0014
484 Major changes between OpenSSL 1.0.0b and OpenSSL 1.0.0c [2 Dec 2010]:
486 o Fix for security issue CVE-2010-4180
487 o Fix for CVE-2010-4252
488 o Fix mishandling of absent EC point format extension.
489 o Fix various platform compilation issues.
490 o Corrected fix for security issue CVE-2010-3864.
492 Major changes between OpenSSL 1.0.0a and OpenSSL 1.0.0b [16 Nov 2010]:
494 o Fix for security issue CVE-2010-3864.
495 o Fix for CVE-2010-2939
496 o Fix WIN32 build system for GOST ENGINE.
498 Major changes between OpenSSL 1.0.0 and OpenSSL 1.0.0a [1 Jun 2010]:
500 o Fix for security issue CVE-2010-1633.
501 o GOST MAC and CFB fixes.
503 Major changes between OpenSSL 0.9.8n and OpenSSL 1.0.0 [29 Mar 2010]:
505 o RFC3280 path validation: sufficient to process PKITS tests.
506 o Integrated support for PVK files and keyblobs.
507 o Change default private key format to PKCS#8.
508 o CMS support: able to process all examples in RFC4134
509 o Streaming ASN1 encode support for PKCS#7 and CMS.
510 o Multiple signer and signer add support for PKCS#7 and CMS.
511 o ASN1 printing support.
512 o Whirlpool hash algorithm added.
513 o RFC3161 time stamp support.
514 o New generalised public key API supporting ENGINE based algorithms.
515 o New generalised public key API utilities.
516 o New ENGINE supporting GOST algorithms.
517 o SSL/TLS GOST ciphersuite support.
518 o PKCS#7 and CMS GOST support.
519 o RFC4279 PSK ciphersuite support.
520 o Supported points format extension for ECC ciphersuites.
521 o ecdsa-with-SHA224/256/384/512 signature types.
522 o dsa-with-SHA224 and dsa-with-SHA256 signature types.
523 o Opaque PRF Input TLS extension support.
524 o Updated time routines to avoid OS limitations.
526 Major changes between OpenSSL 0.9.8m and OpenSSL 0.9.8n [24 Mar 2010]:
528 o CFB cipher definition fixes.
529 o Fix security issues CVE-2010-0740 and CVE-2010-0433.
531 Major changes between OpenSSL 0.9.8l and OpenSSL 0.9.8m [25 Feb 2010]:
533 o Cipher definition fixes.
534 o Workaround for slow RAND_poll() on some WIN32 versions.
535 o Remove MD2 from algorithm tables.
536 o SPKAC handling fixes.
537 o Support for RFC5746 TLS renegotiation extension.
538 o Compression memory leak fixed.
539 o Compression session resumption fixed.
540 o Ticket and SNI coexistence fixes.
541 o Many fixes to DTLS handling.
543 Major changes between OpenSSL 0.9.8k and OpenSSL 0.9.8l [5 Nov 2009]:
545 o Temporary work around for CVE-2009-3555: disable renegotiation.
547 Major changes between OpenSSL 0.9.8j and OpenSSL 0.9.8k [25 Mar 2009]:
549 o Fix various build issues.
550 o Fix security issues (CVE-2009-0590, CVE-2009-0591, CVE-2009-0789)
552 Major changes between OpenSSL 0.9.8i and OpenSSL 0.9.8j [7 Jan 2009]:
554 o Fix security issue (CVE-2008-5077)
555 o Merge FIPS 140-2 branch code.
557 Major changes between OpenSSL 0.9.8g and OpenSSL 0.9.8h [28 May 2008]:
559 o CryptoAPI ENGINE support.
560 o Various precautionary measures.
561 o Fix for bugs affecting certificate request creation.
562 o Support for local machine keyset attribute in PKCS#12 files.
564 Major changes between OpenSSL 0.9.8f and OpenSSL 0.9.8g [19 Oct 2007]:
566 o Backport of CMS functionality to 0.9.8.
567 o Fixes for bugs introduced with 0.9.8f.
569 Major changes between OpenSSL 0.9.8e and OpenSSL 0.9.8f [11 Oct 2007]:
571 o Add gcc 4.2 support.
572 o Add support for AES and SSE2 assembly language optimization
574 o Support for RFC4507bis and server name extensions if explicitly
575 selected at compile time.
577 o RFC4507bis support.
578 o TLS Extensions support.
580 Major changes between OpenSSL 0.9.8d and OpenSSL 0.9.8e [23 Feb 2007]:
582 o Various ciphersuite selection fixes.
585 Major changes between OpenSSL 0.9.8c and OpenSSL 0.9.8d [28 Sep 2006]:
587 o Introduce limits to prevent malicious key DoS (CVE-2006-2940)
588 o Fix security issues (CVE-2006-2937, CVE-2006-3737, CVE-2006-4343)
589 o Changes to ciphersuite selection algorithm
591 Major changes between OpenSSL 0.9.8b and OpenSSL 0.9.8c [5 Sep 2006]:
593 o Fix Daniel Bleichenbacher forged signature attack, CVE-2006-4339
594 o New cipher Camellia
596 Major changes between OpenSSL 0.9.8a and OpenSSL 0.9.8b [4 May 2006]:
598 o Cipher string fixes.
599 o Fixes for VC++ 2005.
600 o Updated ECC cipher suite support.
601 o New functions EVP_CIPHER_CTX_new() and EVP_CIPHER_CTX_free().
602 o Zlib compression usage fixes.
603 o Built in dynamic engine compilation support on Win32.
604 o Fixes auto dynamic engine loading in Win32.
606 Major changes between OpenSSL 0.9.8 and OpenSSL 0.9.8a [11 Oct 2005]:
608 o Fix potential SSL 2.0 rollback, CVE-2005-2969
609 o Extended Windows CE support
611 Major changes between OpenSSL 0.9.7g and OpenSSL 0.9.8 [5 Jul 2005]:
613 o Major work on the BIGNUM library for higher efficiency and to
614 make operations more streamlined and less contradictory. This
615 is the result of a major audit of the BIGNUM library.
616 o Addition of BIGNUM functions for fields GF(2^m) and NIST
617 curves, to support the Elliptic Crypto functions.
618 o Major work on Elliptic Crypto; ECDH and ECDSA added, including
619 the use through EVP, X509 and ENGINE.
620 o New ASN.1 mini-compiler that's usable through the OpenSSL
622 o Added support for ASN.1 indefinite length constructed encoding.
623 o New PKCS#12 'medium level' API to manipulate PKCS#12 files.
624 o Complete rework of shared library construction and linking
625 programs with shared or static libraries, through a separate
627 o Rework of the passing of parameters from one Makefile to another.
628 o Changed ENGINE framework to load dynamic engine modules
629 automatically from specifically given directories.
630 o New structure and ASN.1 functions for CertificatePair.
631 o Changed the ZLIB compression method to be stateful.
632 o Changed the key-generation and primality testing "progress"
633 mechanism to take a structure that contains the ticker
634 function and an argument.
635 o New engine module: GMP (performs private key exponentiation).
636 o New engine module: VIA PadLOck ACE extension in VIA C3
638 o Added support for IPv6 addresses in certificate extensions.
639 See RFC 1884, section 2.2.
640 o Added support for certificate policy mappings, policy
641 constraints and name constraints.
642 o Added support for multi-valued AVAs in the OpenSSL
644 o Added support for multiple certificates with the same subject
645 in the 'openssl ca' index file.
646 o Make it possible to create self-signed certificates using
647 'openssl ca -selfsign'.
648 o Make it possible to generate a serial number file with
649 'openssl ca -create_serial'.
650 o New binary search functions with extended functionality.
652 o New STORE structure and library to provide an interface to all
653 sorts of data repositories. Supports storage of public and
654 private keys, certificates, CRLs, numbers and arbitrary blobs.
655 This library is unfortunately unfinished and unused within
657 o New control functions for the error stack.
658 o Changed the PKCS#7 library to support one-pass S/MIME
660 o Added the possibility to compile without old deprecated
661 functionality with the OPENSSL_NO_DEPRECATED macro or the
662 'no-deprecated' argument to the config and Configure scripts.
663 o Constification of all ASN.1 conversion functions, and other
665 o Improved platform support for PowerPC.
666 o New FIPS 180-2 algorithms (SHA-224, -256, -384 and -512).
667 o New X509_VERIFY_PARAM structure to support parameterisation
668 of X.509 path validation.
669 o Major overhaul of RC4 performance on Intel P4, IA-64 and
671 o Changed the Configure script to have some algorithms disabled
672 by default. Those can be explicitly enabled with the new
673 argument form 'enable-xxx'.
674 o Change the default digest in 'openssl' commands from MD5 to
676 o Added support for DTLS.
677 o New BIGNUM blinding.
678 o Added support for the RSA-PSS encryption scheme
679 o Added support for the RSA X.931 padding.
680 o Added support for BSD sockets on NetWare.
681 o Added support for files larger than 2GB.
682 o Added initial support for Win64.
683 o Added alternate pkg-config files.
685 Major changes between OpenSSL 0.9.7l and OpenSSL 0.9.7m [23 Feb 2007]:
687 o FIPS 1.1.1 module linking.
688 o Various ciphersuite selection fixes.
690 Major changes between OpenSSL 0.9.7k and OpenSSL 0.9.7l [28 Sep 2006]:
692 o Introduce limits to prevent malicious key DoS (CVE-2006-2940)
693 o Fix security issues (CVE-2006-2937, CVE-2006-3737, CVE-2006-4343)
695 Major changes between OpenSSL 0.9.7j and OpenSSL 0.9.7k [5 Sep 2006]:
697 o Fix Daniel Bleichenbacher forged signature attack, CVE-2006-4339
699 Major changes between OpenSSL 0.9.7i and OpenSSL 0.9.7j [4 May 2006]:
701 o Visual C++ 2005 fixes.
702 o Update Windows build system for FIPS.
704 Major changes between OpenSSL 0.9.7h and OpenSSL 0.9.7i [14 Oct 2005]:
706 o Give EVP_MAX_MD_SIZE its old value, except for a FIPS build.
708 Major changes between OpenSSL 0.9.7g and OpenSSL 0.9.7h [11 Oct 2005]:
710 o Fix SSL 2.0 Rollback, CVE-2005-2969
711 o Allow use of fixed-length exponent on DSA signing
712 o Default fixed-window RSA, DSA, DH private-key operations
714 Major changes between OpenSSL 0.9.7f and OpenSSL 0.9.7g [11 Apr 2005]:
716 o More compilation issues fixed.
717 o Adaptation to more modern Kerberos API.
718 o Enhanced or corrected configuration for Solaris64, Mingw and Cygwin.
719 o Enhanced x86_64 assembler BIGNUM module.
720 o More constification.
721 o Added processing of proxy certificates (RFC 3820).
723 Major changes between OpenSSL 0.9.7e and OpenSSL 0.9.7f [22 Mar 2005]:
725 o Several compilation issues fixed.
726 o Many memory allocation failure checks added.
727 o Improved comparison of X509 Name type.
728 o Mandatory basic checks on certificates.
729 o Performance improvements.
731 Major changes between OpenSSL 0.9.7d and OpenSSL 0.9.7e [25 Oct 2004]:
733 o Fix race condition in CRL checking code.
734 o Fixes to PKCS#7 (S/MIME) code.
736 Major changes between OpenSSL 0.9.7c and OpenSSL 0.9.7d [17 Mar 2004]:
738 o Security: Fix Kerberos ciphersuite SSL/TLS handshaking bug
739 o Security: Fix null-pointer assignment in do_change_cipher_spec()
740 o Allow multiple active certificates with same subject in CA index
741 o Multiple X509 verification fixes
742 o Speed up HMAC and other operations
744 Major changes between OpenSSL 0.9.7b and OpenSSL 0.9.7c [30 Sep 2003]:
746 o Security: fix various ASN1 parsing bugs.
747 o New -ignore_err option to OCSP utility.
748 o Various interop and bug fixes in S/MIME code.
749 o SSL/TLS protocol fix for unrequested client certificates.
751 Major changes between OpenSSL 0.9.7a and OpenSSL 0.9.7b [10 Apr 2003]:
753 o Security: counter the Klima-Pokorny-Rosa extension of
754 Bleichbacher's attack
755 o Security: make RSA blinding default.
756 o Configuration: Irix fixes, AIX fixes, better mingw support.
757 o Support for new platforms: linux-ia64-ecc.
758 o Build: shared library support fixes.
759 o ASN.1: treat domainComponent correctly.
760 o Documentation: fixes and additions.
762 Major changes between OpenSSL 0.9.7 and OpenSSL 0.9.7a [19 Feb 2003]:
764 o Security: Important security related bugfixes.
765 o Enhanced compatibility with MIT Kerberos.
766 o Can be built without the ENGINE framework.
767 o IA32 assembler enhancements.
768 o Support for new platforms: FreeBSD/IA64 and FreeBSD/Sparc64.
769 o Configuration: the no-err option now works properly.
770 o SSL/TLS: now handles manual certificate chain building.
771 o SSL/TLS: certain session ID malfunctions corrected.
773 Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.7 [30 Dec 2002]:
775 o New library section OCSP.
776 o Complete rewrite of ASN1 code.
777 o CRL checking in verify code and openssl utility.
778 o Extension copying in 'ca' utility.
779 o Flexible display options in 'ca' utility.
780 o Provisional support for international characters with UTF8.
781 o Support for external crypto devices ('engine') is no longer
782 a separate distribution.
783 o New elliptic curve library section.
784 o New AES (Rijndael) library section.
785 o Support for new platforms: Windows CE, Tandem OSS, A/UX, AIX 64-bit,
786 Linux x86_64, Linux 64-bit on Sparc v9
787 o Extended support for some platforms: VxWorks
788 o Enhanced support for shared libraries.
789 o Now only builds PIC code when shared library support is requested.
790 o Support for pkg-config.
791 o Lots of new manuals.
792 o Makes symbolic links to or copies of manuals to cover all described
794 o Change DES API to clean up the namespace (some applications link also
795 against libdes providing similar functions having the same name).
796 Provide macros for backward compatibility (will be removed in the
798 o Unify handling of cryptographic algorithms (software and engine)
799 to be available via EVP routines for asymmetric and symmetric ciphers.
800 o NCONF: new configuration handling routines.
801 o Change API to use more 'const' modifiers to improve error checking
803 o Finally remove references to RSAref.
804 o Reworked parts of the BIGNUM code.
805 o Support for new engines: Broadcom ubsec, Accelerated Encryption
806 Processing, IBM 4758.
807 o A few new engines added in the demos area.
808 o Extended and corrected OID (object identifier) table.
809 o PRNG: query at more locations for a random device, automatic query for
810 EGD style random sources at several locations.
811 o SSL/TLS: allow optional cipher choice according to server's preference.
812 o SSL/TLS: allow server to explicitly set new session ids.
813 o SSL/TLS: support Kerberos cipher suites (RFC2712).
814 Only supports MIT Kerberos for now.
815 o SSL/TLS: allow more precise control of renegotiations and sessions.
816 o SSL/TLS: add callback to retrieve SSL/TLS messages.
817 o SSL/TLS: support AES cipher suites (RFC3268).
819 Major changes between OpenSSL 0.9.6j and OpenSSL 0.9.6k [30 Sep 2003]:
821 o Security: fix various ASN1 parsing bugs.
822 o SSL/TLS protocol fix for unrequested client certificates.
824 Major changes between OpenSSL 0.9.6i and OpenSSL 0.9.6j [10 Apr 2003]:
826 o Security: counter the Klima-Pokorny-Rosa extension of
827 Bleichbacher's attack
828 o Security: make RSA blinding default.
829 o Build: shared library support fixes.
831 Major changes between OpenSSL 0.9.6h and OpenSSL 0.9.6i [19 Feb 2003]:
833 o Important security related bugfixes.
835 Major changes between OpenSSL 0.9.6g and OpenSSL 0.9.6h [5 Dec 2002]:
837 o New configuration targets for Tandem OSS and A/UX.
838 o New OIDs for Microsoft attributes.
839 o Better handling of SSL session caching.
840 o Better comparison of distinguished names.
841 o Better handling of shared libraries in a mixed GNU/non-GNU environment.
842 o Support assembler code with Borland C.
843 o Fixes for length problems.
844 o Fixes for uninitialised variables.
845 o Fixes for memory leaks, some unusual crashes and some race conditions.
846 o Fixes for smaller building problems.
847 o Updates of manuals, FAQ and other instructive documents.
849 Major changes between OpenSSL 0.9.6f and OpenSSL 0.9.6g [9 Aug 2002]:
851 o Important building fixes on Unix.
853 Major changes between OpenSSL 0.9.6e and OpenSSL 0.9.6f [8 Aug 2002]:
855 o Various important bugfixes.
857 Major changes between OpenSSL 0.9.6d and OpenSSL 0.9.6e [30 Jul 2002]:
859 o Important security related bugfixes.
860 o Various SSL/TLS library bugfixes.
862 Major changes between OpenSSL 0.9.6c and OpenSSL 0.9.6d [9 May 2002]:
864 o Various SSL/TLS library bugfixes.
865 o Fix DH parameter generation for 'non-standard' generators.
867 Major changes between OpenSSL 0.9.6b and OpenSSL 0.9.6c [21 Dec 2001]:
869 o Various SSL/TLS library bugfixes.
870 o BIGNUM library fixes.
871 o RSA OAEP and random number generation fixes.
872 o Object identifiers corrected and added.
873 o Add assembler BN routines for IA64.
874 o Add support for OS/390 Unix, UnixWare with gcc, OpenUNIX 8,
875 MIPS Linux; shared library support for Irix, HP-UX.
876 o Add crypto accelerator support for AEP, Baltimore SureWare,
877 Broadcom and Cryptographic Appliance's keyserver
878 [in 0.9.6c-engine release].
880 Major changes between OpenSSL 0.9.6a and OpenSSL 0.9.6b [9 Jul 2001]:
882 o Security fix: PRNG improvements.
883 o Security fix: RSA OAEP check.
884 o Security fix: Reinsert and fix countermeasure to Bleichbacher's
886 o MIPS bug fix in BIGNUM.
887 o Bug fix in "openssl enc".
888 o Bug fix in X.509 printing routine.
889 o Bug fix in DSA verification routine and DSA S/MIME verification.
890 o Bug fix to make PRNG thread-safe.
891 o Bug fix in RAND_file_name().
892 o Bug fix in compatibility mode trust settings.
893 o Bug fix in blowfish EVP.
894 o Increase default size for BIO buffering filter.
895 o Compatibility fixes in some scripts.
897 Major changes between OpenSSL 0.9.6 and OpenSSL 0.9.6a [5 Apr 2001]:
899 o Security fix: change behavior of OpenSSL to avoid using
900 environment variables when running as root.
901 o Security fix: check the result of RSA-CRT to reduce the
902 possibility of deducing the private key from an incorrectly
903 calculated signature.
904 o Security fix: prevent Bleichenbacher's DSA attack.
905 o Security fix: Zero the premaster secret after deriving the
906 master secret in DH ciphersuites.
907 o Reimplement SSL_peek(), which had various problems.
908 o Compatibility fix: the function des_encrypt() renamed to
909 des_encrypt1() to avoid clashes with some Unixen libc.
910 o Bug fixes for Win32, HP/UX and Irix.
911 o Bug fixes in BIGNUM, SSL, PKCS#7, PKCS#12, X.509, CONF and
912 memory checking routines.
913 o Bug fixes for RSA operations in threaded environments.
914 o Bug fixes in misc. openssl applications.
915 o Remove a few potential memory leaks.
916 o Add tighter checks of BIGNUM routines.
917 o Shared library support has been reworked for generality.
918 o More documentation.
919 o New function BN_rand_range().
920 o Add "-rand" option to openssl s_client and s_server.
922 Major changes between OpenSSL 0.9.5a and OpenSSL 0.9.6 [10 Oct 2000]:
924 o Some documentation for BIO and SSL libraries.
925 o Enhanced chain verification using key identifiers.
926 o New sign and verify options to 'dgst' application.
927 o Support for DER and PEM encoded messages in 'smime' application.
928 o New 'rsautl' application, low level RSA utility.
930 o Bugfix for SSL rollback padding check.
931 o Support for external crypto devices [1].
932 o Enhanced EVP interface.
934 [1] The support for external crypto devices is currently a separate
935 distribution. See the file README.ENGINE.
937 Major changes between OpenSSL 0.9.5 and OpenSSL 0.9.5a [1 Apr 2000]:
939 o Bug fixes for Win32, SuSE Linux, NeXTSTEP and FreeBSD 2.2.8
940 o Shared library support for HPUX and Solaris-gcc
941 o Support of Linux/IA64
942 o Assembler support for Mingw32
943 o New 'rand' application
944 o New way to check for existence of algorithms from scripts
946 Major changes between OpenSSL 0.9.4 and OpenSSL 0.9.5 [25 May 2000]:
948 o S/MIME support in new 'smime' command
949 o Documentation for the OpenSSL command line application
950 o Automation of 'req' application
951 o Fixes to make s_client, s_server work under Windows
952 o Support for multiple fieldnames in SPKACs
953 o New SPKAC command line utility and associated library functions
954 o Options to allow passwords to be obtained from various sources
955 o New public key PEM format and options to handle it
956 o Many other fixes and enhancements to command line utilities
957 o Usable certificate chain verification
958 o Certificate purpose checking
959 o Certificate trust settings
960 o Support of authority information access extension
961 o Extensions in certificate requests
962 o Simplified X509 name and attribute routines
963 o Initial (incomplete) support for international character sets
964 o New DH_METHOD, DSA_METHOD and enhanced RSA_METHOD
965 o Read only memory BIOs and simplified creation function
966 o TLS/SSL protocol bugfixes: Accept TLS 'client hello' in SSL 3.0
967 record; allow fragmentation and interleaving of handshake and other
969 o TLS/SSL code now "tolerates" MS SGC
970 o Work around for Netscape client certificate hang bug
971 o RSA_NULL option that removes RSA patent code but keeps other
973 o Memory leak detection now allows applications to add extra information
974 via a per-thread stack
975 o PRNG robustness improved
977 o BIGNUM library bug fixes
978 o Faster DSA parameter generation
979 o Enhanced support for Alpha Linux
980 o Experimental MacOS support
982 Major changes between OpenSSL 0.9.3 and OpenSSL 0.9.4 [9 Aug 1999]:
984 o Transparent support for PKCS#8 format private keys: these are used
985 by several software packages and are more secure than the standard
987 o PKCS#5 v2.0 implementation
988 o Password callbacks have a new void * argument for application data
989 o Avoid various memory leaks
990 o New pipe-like BIO that allows using the SSL library when actual I/O
991 must be handled by the application (BIO pair)
993 Major changes between OpenSSL 0.9.2b and OpenSSL 0.9.3 [24 May 1999]:
994 o Lots of enhancements and cleanups to the Configuration mechanism
995 o RSA OEAP related fixes
996 o Added `openssl ca -revoke' option for revoking a certificate
997 o Source cleanups: const correctness, type-safe stacks and ASN.1 SETs
998 o Source tree cleanups: removed lots of obsolete files
999 o Thawte SXNet, certificate policies and CRL distribution points
1001 o Preliminary (experimental) S/MIME support
1002 o Support for ASN.1 UTF8String and VisibleString
1003 o Full integration of PKCS#12 code
1004 o Sparc assembler bignum implementation, optimized hash functions
1005 o Option to disable selected ciphers
1007 Major changes between OpenSSL 0.9.1c and OpenSSL 0.9.2b [22 Mar 1999]:
1008 o Fixed a security hole related to session resumption
1009 o Fixed RSA encryption routines for the p < q case
1010 o "ALL" in cipher lists now means "everything except NULL ciphers"
1011 o Support for Triple-DES CBCM cipher
1012 o Support of Optimal Asymmetric Encryption Padding (OAEP) for RSA
1013 o First support for new TLSv1 ciphers
1014 o Added a few new BIOs (syslog BIO, reliable BIO)
1015 o Extended support for DSA certificate/keys.
1016 o Extended support for Certificate Signing Requests (CSR)
1017 o Initial support for X.509v3 extensions
1018 o Extended support for compression inside the SSL record layer
1019 o Overhauled Win32 builds
1020 o Cleanups and fixes to the Big Number (BN) library
1021 o Support for ASN.1 GeneralizedTime
1022 o Splitted ASN.1 SETs from SEQUENCEs
1023 o ASN1 and PEM support for Netscape Certificate Sequences
1024 o Overhauled Perl interface
1025 o Lots of source tree cleanups.
1026 o Lots of memory leak fixes.
1027 o Lots of bug fixes.
1029 Major changes between SSLeay 0.9.0b and OpenSSL 0.9.1c [23 Dec 1998]:
1030 o Integration of the popular NO_RSA/NO_DSA patches
1031 o Initial support for compression inside the SSL record layer
1032 o Added BIO proxy and filtering functionality
1033 o Extended Big Number (BN) library
1034 o Added RIPE MD160 message digest
1035 o Added support for RC2/64bit cipher
1036 o Extended ASN.1 parser routines
1037 o Adjustments of the source tree for CVS
1038 o Support for various new platforms