[thirdparty/openssl.git] / CHANGES


 OpenSSL CHANGES
 _______________

 Changes between 1.0.1c and 1.0.1d [xx XXX xxxx]

  *) Fix possible deadlock when decoding public keys.
     [Steve Henson]

  *) Don't use TLS 1.0 record version number in initial client hello
     if renegotiating.
     [Steve Henson]

 Changes between 1.0.1b and 1.0.1c [10 May 2012]

  *) Sanity check record length before skipping explicit IV in TLS
     1.2, 1.1 and DTLS to fix DoS attack.

     Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
     fuzzing as a service testing platform.
     (CVE-2012-2333)
     [Steve Henson]

  *) Initialise tkeylen properly when encrypting CMS messages.
     Thanks to Solar Designer of Openwall for reporting this issue.
     [Steve Henson]

  *) In FIPS mode don't try to use composite ciphers as they are not
     approved.
     [Steve Henson]

 Changes between 1.0.1a and 1.0.1b [26 Apr 2012]

  *) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
     1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
     mean any application compiled against OpenSSL 1.0.0 headers setting
     SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
     TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
     0x10000000L Any application which was previously compiled against
     OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
     will need to be recompiled as a result. Letting be results in
     inability to disable specifically TLS 1.1 and in client context,
     in unlike event, limit maximum offered version to TLS 1.0 [see below].
     [Steve Henson]

  *) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
     disable just protocol X, but all protocols above X *if* there are
     protocols *below* X still enabled. In more practical terms it means
     that if application wants to disable TLS1.0 in favor of TLS1.1 and
     above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
     SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2. This applies to
     client side.
     [Andy Polyakov]

 Changes between 1.0.1 and 1.0.1a [19 Apr 2012]

  *) Check for potentially exploitable overflows in asn1_d2i_read_bio
     BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
     in CRYPTO_realloc_clean.

     Thanks to Tavis Ormandy, Google Security Team, for discovering this
     issue and to Adam Langley <agl@chromium.org> for fixing it.
     (CVE-2012-2110)
     [Adam Langley (Google), Tavis Ormandy, Google Security Team]

  *) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
     [Adam Langley]

  *) Workarounds for some broken servers that "hang" if a client hello
     record length exceeds 255 bytes.

     1. Do not use record version number > TLS 1.0 in initial client
        hello: some (but not all) hanging servers will now work.
     2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
	the number of ciphers sent in the client hello. This should be
        set to an even number, such as 50, for example by passing:
        -DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
        Most broken servers should now work.
     3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
	TLS 1.2 client support entirely.
     [Steve Henson]

  *) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
     [Andy Polyakov]

 Changes between 1.0.0h and 1.0.1  [14 Mar 2012]

  *) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
     STRING form instead of a DigestInfo.
     [Steve Henson]

  *) The format used for MDC2 RSA signatures is inconsistent between EVP
     and the RSA_sign/RSA_verify functions. This was made more apparent when
     OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
     those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect 
     the correct format in RSA_verify so both forms transparently work.
     [Steve Henson]

  *) Some servers which support TLS 1.0 can choke if we initially indicate
     support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
     encrypted premaster secret. As a workaround use the maximum pemitted
     client version in client hello, this should keep such servers happy
     and still work with previous versions of OpenSSL.
     [Steve Henson]

  *) Add support for TLS/DTLS heartbeats.
     [Robin Seggelmann <seggelmann@fh-muenster.de>]

  *) Add support for SCTP.
     [Robin Seggelmann <seggelmann@fh-muenster.de>]

  *) Improved PRNG seeding for VOS.
     [Paul Green <Paul.Green@stratus.com>]

  *) Extensive assembler packs updates, most notably:

	- x86[_64]:     AES-NI, PCLMULQDQ, RDRAND support;
	- x86[_64]:     SSSE3 support (SHA1, vector-permutation AES);
	- x86_64:       bit-sliced AES implementation;
	- ARM:          NEON support, contemporary platforms optimizations;
	- s390x:        z196 support;
	- *:            GHASH and GF(2^m) multiplication implementations;

     [Andy Polyakov]

  *) Make TLS-SRP code conformant with RFC 5054 API cleanup
     (removal of unnecessary code)
     [Peter Sylvester <peter.sylvester@edelweb.fr>]

  *) Add TLS key material exporter from RFC 5705.
     [Eric Rescorla]

  *) Add DTLS-SRTP negotiation from RFC 5764.
     [Eric Rescorla]

  *) Add Next Protocol Negotiation,
     http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
     disabled with a no-npn flag to config or Configure. Code donated
     by Google.
     [Adam Langley <agl@google.com> and Ben Laurie]

  *) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
     NIST-P256, NIST-P521, with constant-time single point multiplication on
     typical inputs. Compiler support for the nonstandard type __uint128_t is
     required to use this (present in gcc 4.4 and later, for 64-bit builds).
     Code made available under Apache License version 2.0.

     Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
     line to include this in your build of OpenSSL, and run "make depend" (or
     "make update"). This enables the following EC_METHODs:

         EC_GFp_nistp224_method()
         EC_GFp_nistp256_method()
         EC_GFp_nistp521_method()

     EC_GROUP_new_by_curve_name() will automatically use these (while
     EC_GROUP_new_curve_GFp() currently prefers the more flexible
     implementations).
Commit	Line	Data
81a6c781	1
f1c236f8	2	OpenSSL CHANGES
651d0aff RE	3	_______________
651d0aff RE	4
d9c34505 DSH	5	Changes between 1.0.1c and 1.0.1d [xx XXX xxxx]
d9c34505 DSH	6
eeca72f7 DSH	7	*) Fix possible deadlock when decoding public keys.
	8	[Steve Henson]
	9
6e164e5c DSH	10	*) Don't use TLS 1.0 record version number in initial client hello
	11	if renegotiating.
	12	[Steve Henson]
d9c34505	13
f9885acc	14	Changes between 1.0.1b and 1.0.1c [10 May 2012]
c940e070	15
d414a5a0 DSH	16	*) Sanity check record length before skipping explicit IV in TLS
	17	1.2, 1.1 and DTLS to fix DoS attack.
	18
	19	Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
	20	fuzzing as a service testing platform.
	21	(CVE-2012-2333)
	22	[Steve Henson]
	23
5b9d0995 DSH	24	*) Initialise tkeylen properly when encrypting CMS messages.
	25	Thanks to Solar Designer of Openwall for reporting this issue.
	26	[Steve Henson]
	27
c76b7a1a DSH	28	*) In FIPS mode don't try to use composite ciphers as they are not
	29	approved.
	30	[Steve Henson]
c940e070	31
effa47b8	32	Changes between 1.0.1a and 1.0.1b [26 Apr 2012]
e7d2a371	33
6791060e	34	*) OpenSSL 1.0.0 sets SSL_OP_ALL to 0x80000FFFL and OpenSSL 1.0.1 and
502dfeb8 DSH	35	1.0.1a set SSL_OP_NO_TLSv1_1 to 0x00000400L which would unfortunately
	36	mean any application compiled against OpenSSL 1.0.0 headers setting
	37	SSL_OP_ALL would also set SSL_OP_NO_TLSv1_1, unintentionally disablng
6791060e	38	TLS 1.1 also. Fix this by changing the value of SSL_OP_NO_TLSv1_1 to
502dfeb8 DSH	39	0x10000000L Any application which was previously compiled against
502dfeb8 DSH	40	OpenSSL 1.0.1 or 1.0.1a headers and which cares about SSL_OP_NO_TLSv1_1
6791060e AP	41	will need to be recompiled as a result. Letting be results in
	42	inability to disable specifically TLS 1.1 and in client context,
	43	in unlike event, limit maximum offered version to TLS 1.0 [see below].
502dfeb8 DSH	44	[Steve Henson]
502dfeb8 DSH	45
5bbed295 AP	46	*) In order to ensure interoperabilty SSL_OP_NO_protocolX does not
	47	disable just protocol X, but all protocols above X if there are
	48	protocols below X still enabled. In more practical terms it means
	49	that if application wants to disable TLS1.0 in favor of TLS1.1 and
	50	above, it's not sufficient to pass SSL_OP_NO_TLSv1, one has to pass
748628ce AP	51	SSL_OP_NO_TLSv1\|SSL_OP_NO_SSLv3\|SSL_OP_NO_SSLv2. This applies to
748628ce AP	52	client side.
5bbed295	53	[Andy Polyakov]
e7d2a371	54
531c6fc8	55	Changes between 1.0.1 and 1.0.1a [19 Apr 2012]
e733dea3	56
8d5505d0 DSH	57	*) Check for potentially exploitable overflows in asn1_d2i_read_bio
	58	BUF_mem_grow and BUF_mem_grow_clean. Refuse attempts to shrink buffer
	59	in CRYPTO_realloc_clean.
	60
	61	Thanks to Tavis Ormandy, Google Security Team, for discovering this
	62	issue and to Adam Langley <agl@chromium.org> for fixing it.
	63	(CVE-2012-2110)
	64	[Adam Langley (Google), Tavis Ormandy, Google Security Team]
	65
4d936ace BM	66	*) Don't allow TLS 1.2 SHA-256 ciphersuites in TLS 1.0, 1.1 connections.
	67	[Adam Langley]
	68
89bd25eb DSH	69	*) Workarounds for some broken servers that "hang" if a client hello
	70	record length exceeds 255 bytes.
	71
	72	1. Do not use record version number > TLS 1.0 in initial client
	73	hello: some (but not all) hanging servers will now work.
	74	2. If we set OPENSSL_MAX_TLS1_2_CIPHER_LENGTH this will truncate
	75	the number of ciphers sent in the client hello. This should be
	76	set to an even number, such as 50, for example by passing:
	77	-DOPENSSL_MAX_TLS1_2_CIPHER_LENGTH=50 to config or Configure.
	78	Most broken servers should now work.
	79	3. If all else fails setting OPENSSL_NO_TLS1_2_CLIENT will disable
	80	TLS 1.2 client support entirely.
502dfeb8	81	[Steve Henson]
d2f950c9 AP	82
	83	*) Fix SEGV in Vector Permutation AES module observed in OpenSSH.
	84	[Andy Polyakov]
	85
f3dcae15	86	Changes between 1.0.0h and 1.0.1 [14 Mar 2012]
9472baae	87
0cd7a032 DSH	88	*) Add compatibility with old MDC2 signatures which use an ASN1 OCTET
	89	STRING form instead of a DigestInfo.
	90	[Steve Henson]
	91
16b7c81d DSH	92	*) The format used for MDC2 RSA signatures is inconsistent between EVP
	93	and the RSA_sign/RSA_verify functions. This was made more apparent when
	94	OpenSSL used RSA_sign/RSA_verify for some RSA signatures in particular
	95	those which went through EVP_PKEY_METHOD in 1.0.0 and later. Detect
	96	the correct format in RSA_verify so both forms transparently work.
	97	[Steve Henson]
	98
fc6800d1 DSH	99	*) Some servers which support TLS 1.0 can choke if we initially indicate
	100	support for TLS 1.2 and later renegotiate using TLS 1.0 in the RSA
	101	encrypted premaster secret. As a workaround use the maximum pemitted
	102	client version in client hello, this should keep such servers happy
	103	and still work with previous versions of OpenSSL.
	104	[Steve Henson]
	105
bd6941cf DSH	106	*) Add support for TLS/DTLS heartbeats.
	107	[Robin Seggelmann <seggelmann@fh-muenster.de>]
	108
6e750fcb DSH	109	*) Add support for SCTP.
	110	[Robin Seggelmann <seggelmann@fh-muenster.de>]
	111
62308f3f DSH	112	*) Improved PRNG seeding for VOS.
	113	[Paul Green <Paul.Green@stratus.com>]
	114
cecafcce AP	115	*) Extensive assembler packs updates, most notably:
	116
	117	- x86[_64]: AES-NI, PCLMULQDQ, RDRAND support;
	118	- x86[_64]: SSSE3 support (SHA1, vector-permutation AES);
	119	- x86_64: bit-sliced AES implementation;
	120	- ARM: NEON support, contemporary platforms optimizations;
	121	- s390x: z196 support;
	122	- *: GHASH and GF(2^m) multiplication implementations;
	123
	124	[Andy Polyakov]
	125
ca0efb75 DSH	126	*) Make TLS-SRP code conformant with RFC 5054 API cleanup
	127	(removal of unnecessary code)
	128	[Peter Sylvester <peter.sylvester@edelweb.fr>]
	129
b1d74291 BL	130	*) Add TLS key material exporter from RFC 5705.
	131	[Eric Rescorla]
	132
060a38a2 BL	133	*) Add DTLS-SRTP negotiation from RFC 5764.
	134	[Eric Rescorla]
	135
e2809bfb BL	136	*) Add Next Protocol Negotiation,
	137	http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-00. Can be
	138	disabled with a no-npn flag to config or Configure. Code donated
	139	by Google.
	140	[Adam Langley <agl@google.com> and Ben Laurie]
	141
9c37519b BM	142	*) Add optional 64-bit optimized implementations of elliptic curves NIST-P224,
	143	NIST-P256, NIST-P521, with constant-time single point multiplication on
	144	typical inputs. Compiler support for the nonstandard type __uint128_t is
3d520f7c BM	145	required to use this (present in gcc 4.4 and later, for 64-bit builds).
3d520f7c BM	146	Code made available under Apache License version 2.0.
9c37519b	147
3d520f7c BM	148	Specify "enable-ec_nistp_64_gcc_128" on the Configure (or config) command
	149	line to include this in your build of OpenSSL, and run "make depend" (or
	150	"make update"). This enables the following EC_METHODs:
9c37519b BM	151
	152	EC_GFp_nistp224_method()
	153	EC_GFp_nistp256_method()
	154	EC_GFp_nistp521_method()
	155
	156	EC_GROUP_new_by_curve_name() will automatically use these (while
	157	EC_GROUP_new_curve_GFp() currently prefers the more flexible
	158	implementations).
	159