OpenSSL CHANGES
_______________
+ Changes between 0.9.8g and 0.9.8h-fips [xx XXX xxxx]
+
+ *) Add option --with-fipslibdir to specify location of fipscanister.lib
+ and friends. When combined with fips build option fipscanister.lib is
+ not built but linked from the supplied directory. Always link fips
+ utilities against fiscanister.lib only except in fipsdso builds.
+ [Steve Henson]
+
+ *) Add SSE2 instruction support to WIN32 build. These will be compiled
+ by default and used if an appopriate CPU is detected. Some older versions
+ of NASM or MASM which don't support SSE2 will need to be updated.
+ [Steve Henson]
+
+ *) Tolerate DigestInfo structure with absent parameters in FIPS mode
+ (as required by several standards).
+ [Steve Henson]
+
+ *) Enhance mkfipsscr.pl to cope with different directory layouts. It now
+ relies on the filename and makes no assumptions about the pathname.
+ In the case of PSS it scans the file to determine the salt length.
+ Paths can be filtered. Also reports duplicate and missing files.
+ [Steve Henson]
+
+ *) Updates to WIN32 build system. Make use of AES assembly language routines.
+ Use assembly language routines in FIPS compilation.
+ [Steve Henson]
+
+ *) Use standard implementations of SHAx, DES, AES under crypto/ in FIPS
+ mode to avoid having to maintain two versions. This will also make use
+ of appropriate assembly language optimizations.
+ [Steve Henson]
+
+ *) Check for selftest status in all crypto operations and exit with a
+ fatal error if selftest failed.
+ [Steve Henson]
+
+ *) New flag in EVP_CIPHER: EVP_CIPH_FLAG_DEFAULT_ASN1. This will
+ automatically use EVP_CIPHER_{get,set}_asn1_iv and avoid the
+ need for any ASN1 dependencies in FIPS library. Move AES and 3DES
+ cipher definitions to fips library and modify AES and 3DES algorithm
+ tests and self tests to use EVP.
+ [Steve Henson]
+
+ *) Move EVP cipher code into enc_min.c to support a minimal implementation
+ for use by FIPS applications.
+ [Steve Henson]
+
+ *) Add algorithm config module. Currently just handles setting FIPS mode.
+ [Steve Henson]
+
+ *) Rewrite self tests and pairwise tests to use EVP. Add more extensive
+ self tests for RSA in all digests and modes.
+ [Steve Henson]
+
+ *) New flags RSA_FIPS_METHOD and DSA_FIPS_METHOD to indicate a method is
+ allowed in FIPS mode. Disable direct low level RSA and DSA signature
+ operations in FIPS mode so all operations have to be made via EVP.
+ [Steve Henson]
+
+ *) New flag EVP_MD_FLAG_SVCTX which passes EVP_MD_CTX and key to underlying
+ sign/verify method. This permits the method to perform finalization
+ and signing itself and have access to the EVP_MD_CTX structure in case
+ additional parameters are needed. Modify fips_{dsa,rsa}_{sign,verify}
+ to use EVP_MD_FLAG_SVCTX and support PSS and X9.31 RSA modes.
+ Modify RSA algorithm test programs to use new parameters.
+ [Steve Henson]
+
+ *) Add small standalone ASN1 encoder/decoder to handle DSA signature format.
+ Modify test, algorithm test and selftest routines to use EVP for DSA.
+ Move FIPS implementation of EVP_sha*() and EVP_dss1() under fips-1.0.
+ [Steve Henson]
+
+ *) Modify VC++ build system to rename .text and .rdata segments in
+ FIPS sources to .fipst${a,b,c}, and $fipsr${a,b,c} and place them
+ in a static library fipscanister.lib using a perl script. These are
+ then combined by the VC++ linker into a single segment in suffix
+ order but without the suffix (i.e. .fipstx, .fipsrd and .fipsda).
+ This serves the same purpose as fipscanister.o on other platforms
+ but has the advantage that it can be created using only standard VC++
+ utilities.
+ [Steve Henson and Andy Polyakov]
+
+ *) Modify WIN32 build system to forward references functions implemented
+ in FIPS DLL.
+ [Steve Henson]
+
+ *) Move error library so that all lhash dependencies are in a separate
+ file. Include a simplified ERR_get_state() function for stand alone
+ FIPS applications. Include a initialization function OPENSSL_init()
+ to set all callbacks, automatically call OPENSSL_init() once when
+ a cipher or digest is added. This should mean that almost all applications
+ set the callbacks automatically. Exceptional cases can call OPENSSL_init()
+ manually like this:
+
+#ifdef OPENSSL_HAVE_INIT
+ OPENSSL_init();
+#endif
+ before starting any threads.
+ [Steve Henson]
+
+ *) Collect common functions into header file "fips_utl.h".
+ [Steve Henson]
+
+ *) Only enable dynamic lock functionality in CRYPTO_lock() when it is really
+ needed. Move some lock functionality into new file dyn_lck.c .
+ This further reduces FIPS dependencies allowing the complete removal
+ of STACK and OBJ_bsearch().
+ [Steve Henson]
+
+ *) Reduce FIPS test program dependencies by providing stand alone
+ versions of some existing functions in libcrypto. Avoid use
+ of BIOs by converting to system stdio. Move some functions in FIPS
+ files: e.g. all use of BIO_printf().
+ [Steve Henson]
+
+ *) Modify build of libcrypto in FIPS mode by using a perl
+ script "arx.pl" which calls the archiver specifically
+ excluding any FIPS dependencies in libcrypto.
+ [Steve Henson]
+
+ *) Port OpenSSL 0.9.7 FIPS code to 0.9.8. Convert to new
+ Makefile form. Update Configure. Convert and update
+ FIPS source files. Update libcrypto, libssl and apps
+ with additional functionality from 0.9.7 FIPS code.
+ Update Windows build system.
+ [Steve Henson]
+
+ Changes between 0.9.8g and 0.9.8h [xx XXX xxxx]
+
+ *) Implement certificate status request TLS extension defined in RFC3546.
+ A client can set the appropriate parameters and receive the encoded
+ OCSP response via a callback. A server can query the supplied parameters
+ and set the encoded OCSP response in the callback. Add simplified examples
+ to s_client and s_server.
+ [Steve Henson]
+
+ Changes between 0.9.8f and 0.9.8g [19 Oct 2007]
+
+ *) Fix various bugs:
+ + Binary incompatibility of ssl_ctx_st structure
+ + DTLS interoperation with non-compliant servers
+ + Don't call get_session_cb() without proposed session
+ + Fix ia64 assembler code
+ [Andy Polyakov, Steve Henson]
+
+ Changes between 0.9.8e and 0.9.8f [11 Oct 2007]
+
+ *) DTLS Handshake overhaul. There were longstanding issues with
+ OpenSSL DTLS implementation, which were making it impossible for
+ RFC 4347 compliant client to communicate with OpenSSL server.
+ Unfortunately just fixing these incompatibilities would "cut off"
+ pre-0.9.8f clients. To allow for hassle free upgrade post-0.9.8e
+ server keeps tolerating non RFC compliant syntax. The opposite is
+ not true, 0.9.8f client can not communicate with earlier server.
+ This update even addresses CVE-2007-4995.
+ [Andy Polyakov]
+
+ *) Changes to avoid need for function casts in OpenSSL: some compilers
+ (gcc 4.2 and later) reject their use.
+ [Kurt Roeckx <kurt@roeckx.be>, Peter Hartley <pdh@utter.chaos.org.uk>,
+ Steve Henson]
+
+ *) Add RFC4507 support to OpenSSL. This includes the corrections in
+ RFC4507bis. The encrypted ticket format is an encrypted encoded
+ SSL_SESSION structure, that way new session features are automatically
+ supported.
+
+ If a client application caches session in an SSL_SESSION structure
+ support is transparent because tickets are now stored in the encoded
+ SSL_SESSION.
+
+ The SSL_CTX structure automatically generates keys for ticket
+ protection in servers so again support should be possible
+ with no application modification.
+
+ If a client or server wishes to disable RFC4507 support then the option
+ SSL_OP_NO_TICKET can be set.
+
+ Add a TLS extension debugging callback to allow the contents of any client
+ or server extensions to be examined.
+
+ This work was sponsored by Google.
+ [Steve Henson]
+
+ *) Add initial support for TLS extensions, specifically for the server_name
+ extension so far. The SSL_SESSION, SSL_CTX, and SSL data structures now
+ have new members for a host name. The SSL data structure has an
+ additional member SSL_CTX *initial_ctx so that new sessions can be
+ stored in that context to allow for session resumption, even after the
+ SSL has been switched to a new SSL_CTX in reaction to a client's
+ server_name extension.
+
+ New functions (subject to change):
+
+ SSL_get_servername()
+ SSL_get_servername_type()
+ SSL_set_SSL_CTX()
+
+ New CTRL codes and macros (subject to change):
+
+ SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
+ - SSL_CTX_set_tlsext_servername_callback()
+ SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG
+ - SSL_CTX_set_tlsext_servername_arg()
+ SSL_CTRL_SET_TLSEXT_HOSTNAME - SSL_set_tlsext_host_name()
+
+ openssl s_client has a new '-servername ...' option.
+
+ openssl s_server has new options '-servername_host ...', '-cert2 ...',
+ '-key2 ...', '-servername_fatal' (subject to change). This allows
+ testing the HostName extension for a specific single host name ('-cert'
+ and '-key' remain fallbacks for handshakes without HostName
+ negotiation). If the unrecogninzed_name alert has to be sent, this by
+ default is a warning; it becomes fatal with the '-servername_fatal'
+ option.
+
+ [Peter Sylvester, Remy Allais, Christophe Renou, Steve Henson]
+
+ *) Add AES and SSE2 assembly language support to VC++ build.
+ [Steve Henson]
+
+ *) Mitigate attack on final subtraction in Montgomery reduction.
+ [Andy Polyakov]
+
+ *) Fix crypto/ec/ec_mult.c to work properly with scalars of value 0
+ (which previously caused an internal error).
+ [Bodo Moeller]
+
+ *) Squeeze another 10% out of IGE mode when in != out.
+ [Ben Laurie]
+
+ *) AES IGE mode speedup.
+ [Dean Gaudet (Google)]
+
+ *) Add the Korean symmetric 128-bit cipher SEED (see
+ http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
+ add SEED ciphersuites from RFC 4162:
+
+ TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
+ TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
+ TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
+ TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
+
+ To minimize changes between patchlevels in the OpenSSL 0.9.8
+ series, SEED remains excluded from compilation unless OpenSSL
+ is configured with 'enable-seed'.
+ [KISA, Bodo Moeller]
+
+ *) Mitigate branch prediction attacks, which can be practical if a
+ single processor is shared, allowing a spy process to extract
+ information. For detailed background information, see
+ http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
+ J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
+ and Necessary Software Countermeasures"). The core of the change
+ are new versions BN_div_no_branch() and
+ BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
+ respectively, which are slower, but avoid the security-relevant
+ conditional branches. These are automatically called by BN_div()
+ and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
+ of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
+ remove a conditional branch.
+
+ BN_FLG_CONSTTIME is the new name for the previous
+ BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
+ modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
+ in the exponent causes BN_mod_exp_mont() to use the alternative
+ implementation in BN_mod_exp_mont_consttime().) The old name
+ remains as a deprecated alias.
+
+ Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
+ RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
+ constant-time implementations for more than just exponentiation.
+ Here too the old name is kept as a deprecated alias.
+
+ BN_BLINDING_new() will now use BN_dup() for the modulus so that
+ the BN_BLINDING structure gets an independent copy of the
+ modulus. This means that the previous "BIGNUM *m" argument to
+ BN_BLINDING_new() and to BN_BLINDING_create_param() now
+ essentially becomes "const BIGNUM *m", although we can't actually
+ change this in the header file before 0.9.9. It allows
+ RSA_setup_blinding() to use BN_with_flags() on the modulus to
+ enable BN_FLG_CONSTTIME.
+
+ [Matthew D Wood (Intel Corp)]
+
+ *) In the SSL/TLS server implementation, be strict about session ID
+ context matching (which matters if an application uses a single
+ external cache for different purposes). Previously,
+ out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
+ set. This did ensure strict client verification, but meant that,
+ with applications using a single external cache for quite
+ different requirements, clients could circumvent ciphersuite
+ restrictions for a given session ID context by starting a session
+ in a different context.
+ [Bodo Moeller]
+
+ *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
+ a ciphersuite string such as "DEFAULT:RSA" cannot enable
+ authentication-only ciphersuites.
+ [Bodo Moeller]
+
+ Changes between 0.9.8e and 0.9.8f [23 Feb 2007]
+
+ *) Mitigate branch prediction attacks, which can be practical if a
+ single processor is shared, allowing a spy process to extract
+ information. For detailed background information, see
+ http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
+ J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
+ and Necessary Software Countermeasures"). The core of the change
+ are new versions BN_div_no_branch() and
+ BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
+ respectively, which are slower, but avoid the security-relevant
+ conditional branches. These are automatically called by BN_div()
+ and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for the
+ modulus. Also, BN_is_bit_set() has been changed to remove a
+ conditional branch.
+
+ BN_FLG_CONSTTIME is the new name for the previous
+ BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
+ modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
+ in the exponent causes BN_mod_exp_mont() to use the alternative
+ implementation in BN_mod_exp_mont_consttime().) The old name
+ remains as a deprecated alias.
+
+ Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
+ RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
+ constant-time implementations for more than just exponentiation.
+ Here too the old name is kept as a deprecated alias.
+
+ BN_BLINDING_new() will now use BN_dup() for the modulus so that
+ the BN_BLINDING structure gets an independent copy of the
+ modulus. This means that the previous "BIGNUM *m" argument to
+ BN_BLINDING_new() and to BN_BLINDING_create_param() now
+ essentially becomes "const BIGNUM *m", although we can't actually
+ change this in the header file before 0.9.9. It allows
+ RSA_setup_blinding() to use BN_with_flags() on the modulus to
+ enable BN_FLG_CONSTTIME.
+
+ [Matthew D Wood (Intel Corp)]
+
+ *) Mitigate branch prediction attacks, which can be practical if a
+ single processor is shared, allowing a spy process to extract
+ information. For detailed background information, see
+ http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
+ J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
+ and Necessary Software Countermeasures"). The core of the change
+ are new versions BN_div_no_branch() and
+ BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
+ respectively, which are slower, but avoid the security-relevant
+ conditional branches. These are automatically called by BN_div()
+ and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
+ of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
+ remove a conditional branch.
+
+ BN_FLG_CONSTTIME is the new name for the previous
+ BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
+ modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
+ in the exponent causes BN_mod_exp_mont() to use the alternative
+ implementation in BN_mod_exp_mont_consttime().) The old name
+ remains as a deprecated alias.
+
+ Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
+ RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
+ constant-time implementations for more than just exponentiation.
+ Here too the old name is kept as a deprecated alias.
+
+ BN_BLINDING_new() will now use BN_dup() for the modulus so that
+ the BN_BLINDING structure gets an independent copy of the
+ modulus. This means that the previous "BIGNUM *m" argument to
+ BN_BLINDING_new() and to BN_BLINDING_create_param() now
+ essentially becomes "const BIGNUM *m", although we can't actually
+ change this in the header file before 0.9.9. It allows
+ RSA_setup_blinding() to use BN_with_flags() on the modulus to
+ enable BN_FLG_CONSTTIME.
+
+ [Matthew D Wood (Intel Corp)]
+
+ *) Add the Korean symmetric 128-bit cipher SEED (see
+ http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
+ add SEED ciphersuites from RFC 4162:
+
+ TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
+ TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
+ TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
+ TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
+
+ To minimize changes between patchlevels in the OpenSSL 0.9.8
+ series, SEED remains excluded from compilation unless OpenSSL
+ is configured with 'enable-seed'.
+ [KISA, Bodo Moeller]
+
+ *) Mitigate branch prediction attacks, which can be practical if a
+ single processor is shared, allowing a spy process to extract
+ information. For detailed background information, see
+ http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
+ J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
+ and Necessary Software Countermeasures"). The core of the change
+ are new versions BN_div_no_branch() and
+ BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
+ respectively, which are slower, but avoid the security-relevant
+ conditional branches. These are automatically called by BN_div()
+ and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
+ of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
+ remove a conditional branch.
+
+ BN_FLG_CONSTTIME is the new name for the previous
+ BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
+ modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
+ in the exponent causes BN_mod_exp_mont() to use the alternative
+ implementation in BN_mod_exp_mont_consttime().) The old name
+ remains as a deprecated alias.
+
+ Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
+ RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
+ constant-time implementations for more than just exponentiation.
+ Here too the old name is kept as a deprecated alias.
+
+ BN_BLINDING_new() will now use BN_dup() for the modulus so that
+ the BN_BLINDING structure gets an independent copy of the
+ modulus. This means that the previous "BIGNUM *m" argument to
+ BN_BLINDING_new() and to BN_BLINDING_create_param() now
+ essentially becomes "const BIGNUM *m", although we can't actually
+ change this in the header file before 0.9.9. It allows
+ RSA_setup_blinding() to use BN_with_flags() on the modulus to
+ enable BN_FLG_CONSTTIME.
+
+ [Matthew D Wood (Intel Corp)]
+
+ *) Add the Korean symmetric 128-bit cipher SEED (see
+ http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
+ add SEED ciphersuites from RFC 4162:
+
+ TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
+ TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
+ TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
+ TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
+
+ To minimize changes between patchlevels in the OpenSSL 0.9.8
+ series, SEED remains excluded from compilation unless OpenSSL
+ is configured with 'enable-seed'.
+ [KISA, Bodo Moeller]
+
+ *) Mitigate branch prediction attacks, which can be practical if a
+ single processor is shared, allowing a spy process to extract
+ information. For detailed background information, see
+ http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
+ J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
+ and Necessary Software Countermeasures"). The core of the change
+ are new versions BN_div_no_branch() and
+ BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
+ respectively, which are slower, but avoid the security-relevant
+ conditional branches. These are automatically called by BN_div()
+ and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
+ of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
+ remove a conditional branch.
+
+ BN_FLG_CONSTTIME is the new name for the previous
+ BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
+ modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
+ in the exponent causes BN_mod_exp_mont() to use the alternative
+ implementation in BN_mod_exp_mont_consttime().) The old name
+ remains as a deprecated alias.
+
+ Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
+ RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
+ constant-time implementations for more than just exponentiation.
+ Here too the old name is kept as a deprecated alias.
+
+ BN_BLINDING_new() will now use BN_dup() for the modulus so that
+ the BN_BLINDING structure gets an independent copy of the
+ modulus. This means that the previous "BIGNUM *m" argument to
+ BN_BLINDING_new() and to BN_BLINDING_create_param() now
+ essentially becomes "const BIGNUM *m", although we can't actually
+ change this in the header file before 0.9.9. It allows
+ RSA_setup_blinding() to use BN_with_flags() on the modulus to
+ enable BN_FLG_CONSTTIME.
+
+ [Matthew D Wood (Intel Corp)]
+
+ *) Squeeze another 10% out of IGE mode when in != out.
+ [Ben Laurie]
+
+ *) AES IGE mode speedup.
+ [Dean Gaudet (Google)]
+
+ *) Add the Korean symmetric 128-bit cipher SEED (see
+ http://www.kisa.or.kr/kisa/seed/jsp/seed_eng.jsp) and
+ add SEED ciphersuites from RFC 4162:
+
+ TLS_RSA_WITH_SEED_CBC_SHA = "SEED-SHA"
+ TLS_DHE_DSS_WITH_SEED_CBC_SHA = "DHE-DSS-SEED-SHA"
+ TLS_DHE_RSA_WITH_SEED_CBC_SHA = "DHE-RSA-SEED-SHA"
+ TLS_DH_anon_WITH_SEED_CBC_SHA = "ADH-SEED-SHA"
+
+ To minimize changes between patchlevels in the OpenSSL 0.9.8
+ series, SEED remains excluded from compilation unless OpenSSL
+ is configured with 'enable-seed'.
+ [KISA, Bodo Moeller]
+
+ *) Mitigate branch prediction attacks, which can be practical if a
+ single processor is shared, allowing a spy process to extract
+ information. For detailed background information, see
+ http://eprint.iacr.org/2007/039 (O. Aciicmez, S. Gueron,
+ J.-P. Seifert, "New Branch Prediction Vulnerabilities in OpenSSL
+ and Necessary Software Countermeasures"). The core of the change
+ are new versions BN_div_no_branch() and
+ BN_mod_inverse_no_branch() of BN_div() and BN_mod_inverse(),
+ respectively, which are slower, but avoid the security-relevant
+ conditional branches. These are automatically called by BN_div()
+ and BN_mod_inverse() if the flag BN_FLG_CONSTTIME is set for one
+ of the input BIGNUMs. Also, BN_is_bit_set() has been changed to
+ remove a conditional branch.
+
+ BN_FLG_CONSTTIME is the new name for the previous
+ BN_FLG_EXP_CONSTTIME flag, since it now affects more than just
+ modular exponentiation. (Since OpenSSL 0.9.7h, setting this flag
+ in the exponent causes BN_mod_exp_mont() to use the alternative
+ implementation in BN_mod_exp_mont_consttime().) The old name
+ remains as a deprecated alias.
+
+ Similary, RSA_FLAG_NO_EXP_CONSTTIME is replaced by a more general
+ RSA_FLAG_NO_CONSTTIME flag since the RSA implementation now uses
+ constant-time implementations for more than just exponentiation.
+ Here too the old name is kept as a deprecated alias.
+
+ BN_BLINDING_new() will now use BN_dup() for the modulus so that
+ the BN_BLINDING structure gets an independent copy of the
+ modulus. This means that the previous "BIGNUM *m" argument to
+ BN_BLINDING_new() and to BN_BLINDING_create_param() now
+ essentially becomes "const BIGNUM *m", although we can't actually
+ change this in the header file before 0.9.9. It allows
+ RSA_setup_blinding() to use BN_with_flags() on the modulus to
+ enable BN_FLG_CONSTTIME.
+
+ [Matthew D Wood (Intel Corp)]
+
+ *) In the SSL/TLS server implementation, be strict about session ID
+ context matching (which matters if an application uses a single
+ external cache for different purposes). Previously,
+ out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
+ set. This did ensure strict client verification, but meant that,
+ with applications using a single external cache for quite
+ different requirements, clients could circumvent ciphersuite
+ restrictions for a given session ID context by starting a session
+ in a different context.
+ [Bodo Moeller]
+
+ *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
+ a ciphersuite string such as "DEFAULT:RSA" cannot enable
+ authentication-only ciphersuites.
+ [Bodo Moeller]
+
+ Changes between 0.9.8d and 0.9.8e [23 Feb 2007]
+
+ *) Since AES128 and AES256 (and similarly Camellia128 and
+ Camellia256) share a single mask bit in the logic of
+ ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
+ kludge to work properly if AES128 is available and AES256 isn't
+ (or if Camellia128 is available and Camellia256 isn't).
+ [Victor Duchovni]
+
+ *) Fix the BIT STRING encoding generated by crypto/ec/ec_asn1.c
+ (within i2d_ECPrivateKey, i2d_ECPKParameters, i2d_ECParameters):
+ When a point or a seed is encoded in a BIT STRING, we need to
+ prevent the removal of trailing zero bits to get the proper DER
+ encoding. (By default, crypto/asn1/a_bitstr.c assumes the case
+ of a NamedBitList, for which trailing 0 bits need to be removed.)
+ [Bodo Moeller]
+
+ *) Have SSL/TLS server implementation tolerate "mismatched" record
+ protocol version while receiving ClientHello even if the
+ ClientHello is fragmented. (The server can't insist on the
+ particular protocol version it has chosen before the ServerHello
+ message has informed the client about his choice.)
+ [Bodo Moeller]
+
+ *) Add RFC 3779 support.
+ [Rob Austein for ARIN, Ben Laurie]
+
+ *) Load error codes if they are not already present instead of using a
+ static variable. This allows them to be cleanly unloaded and reloaded.
+ Improve header file function name parsing.
+ [Steve Henson]
+
+ *) extend SMTP and IMAP protocol emulation in s_client to use EHLO
+ or CAPABILITY handshake as required by RFCs.
+ [Goetz Babin-Ebell]
+
+ Changes between 0.9.8c and 0.9.8d [28 Sep 2006]
+
+ *) Introduce limits to prevent malicious keys being able to
+ cause a denial of service. (CVE-2006-2940)
+ [Steve Henson, Bodo Moeller]
+
+ *) Fix ASN.1 parsing of certain invalid structures that can result
+ in a denial of service. (CVE-2006-2937) [Steve Henson]
+
+ *) Fix buffer overflow in SSL_get_shared_ciphers() function.
+ (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
+
+ *) Fix SSL client code which could crash if connecting to a
+ malicious SSLv2 server. (CVE-2006-4343)
+ [Tavis Ormandy and Will Drewry, Google Security Team]
+
+ *) Since 0.9.8b, ciphersuite strings naming explicit ciphersuites
+ match only those. Before that, "AES256-SHA" would be interpreted
+ as a pattern and match "AES128-SHA" too (since AES128-SHA got
+ the same strength classification in 0.9.7h) as we currently only
+ have a single AES bit in the ciphersuite description bitmap.
+ That change, however, also applied to ciphersuite strings such as
+ "RC4-MD5" that intentionally matched multiple ciphersuites --
+ namely, SSL 2.0 ciphersuites in addition to the more common ones
+ from SSL 3.0/TLS 1.0.
+
+ So we change the selection algorithm again: Naming an explicit
+ ciphersuite selects this one ciphersuite, and any other similar
+ ciphersuite (same bitmap) from *other* protocol versions.
+ Thus, "RC4-MD5" again will properly select both the SSL 2.0
+ ciphersuite and the SSL 3.0/TLS 1.0 ciphersuite.
+
+ Since SSL 2.0 does not have any ciphersuites for which the
+ 128/256 bit distinction would be relevant, this works for now.
+ The proper fix will be to use different bits for AES128 and
+ AES256, which would have avoided the problems from the beginning;
+ however, bits are scarce, so we can only do this in a new release
+ (not just a patchlevel) when we can change the SSL_CIPHER
+ definition to split the single 'unsigned long mask' bitmap into
+ multiple values to extend the available space.
+
+ [Bodo Moeller]
+
+ Changes between 0.9.8b and 0.9.8c [05 Sep 2006]
+
+ *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
+ (CVE-2006-4339) [Ben Laurie and Google Security Team]
+
+ *) Add AES IGE and biIGE modes.
+ [Ben Laurie]
+
+ *) Change the Unix randomness entropy gathering to use poll() when
+ possible instead of select(), since the latter has some
+ undesirable limitations.
+ [Darryl Miles via Richard Levitte and Bodo Moeller]
+
+ *) Disable "ECCdraft" ciphersuites more thoroughly. Now special
+ treatment in ssl/ssl_ciph.s makes sure that these ciphersuites
+ cannot be implicitly activated as part of, e.g., the "AES" alias.
+ However, please upgrade to OpenSSL 0.9.9[-dev] for
+ non-experimental use of the ECC ciphersuites to get TLS extension
+ support, which is required for curve and point format negotiation
+ to avoid potential handshake problems.
+ [Bodo Moeller]
+
+ *) Disable rogue ciphersuites:
+
+ - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
+ - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
+ - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
+
+ The latter two were purportedly from
+ draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
+ appear there.
+
+ Also deactivate the remaining ciphersuites from
+ draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
+ unofficial, and the ID has long expired.
+ [Bodo Moeller]
+
+ *) Fix RSA blinding Heisenbug (problems sometimes occured on
+ dual-core machines) and other potential thread-safety issues.
+ [Bodo Moeller]
+
+ *) Add the symmetric cipher Camellia (128-bit, 192-bit, 256-bit key
+ versions), which is now available for royalty-free use
+ (see http://info.isl.ntt.co.jp/crypt/eng/info/chiteki.html).
+ Also, add Camellia TLS ciphersuites from RFC 4132.
+
+ To minimize changes between patchlevels in the OpenSSL 0.9.8
+ series, Camellia remains excluded from compilation unless OpenSSL
+ is configured with 'enable-camellia'.
+ [NTT]
+
+ *) Disable the padding bug check when compression is in use. The padding
+ bug check assumes the first packet is of even length, this is not
+ necessarily true if compresssion is enabled and can result in false
+ positives causing handshake failure. The actual bug test is ancient
+ code so it is hoped that implementations will either have fixed it by
+ now or any which still have the bug do not support compression.
+ [Steve Henson]
+
Changes between 0.9.8a and 0.9.8b [04 May 2006]
*) When applying a cipher rule check to see if string match is an explicit
Changes between 0.9.7h and 0.9.8 [05 Jul 2005]
+ [NB: OpenSSL 0.9.7i and later 0.9.7 patch levels were released after
+ OpenSSL 0.9.8.]
+
*) Add libcrypto.pc and libssl.pc for those who feel they need them.
[Richard Levitte]
differing sizes.
[Richard Levitte]
+ Changes between 0.9.7m and 0.9.7n [xx XXX xxxx]
+
+ *) In the SSL/TLS server implementation, be strict about session ID
+ context matching (which matters if an application uses a single
+ external cache for different purposes). Previously,
+ out-of-context reuse was forbidden only if SSL_VERIFY_PEER was
+ set. This did ensure strict client verification, but meant that,
+ with applications using a single external cache for quite
+ different requirements, clients could circumvent ciphersuite
+ restrictions for a given session ID context by starting a session
+ in a different context.
+ [Bodo Moeller]
+
+ Changes between 0.9.7l and 0.9.7m [23 Feb 2007]
+
+ *) Cleanse PEM buffers before freeing them since they may contain
+ sensitive data.
+ [Benjamin Bennett <ben@psc.edu>]
+
+ *) Include "!eNULL" in SSL_DEFAULT_CIPHER_LIST to make sure that
+ a ciphersuite string such as "DEFAULT:RSA" cannot enable
+ authentication-only ciphersuites.
+ [Bodo Moeller]
+
+ *) Since AES128 and AES256 share a single mask bit in the logic of
+ ssl/ssl_ciph.c, the code for masking out disabled ciphers needs a
+ kludge to work properly if AES128 is available and AES256 isn't.
+ [Victor Duchovni]
+
+ *) Expand security boundary to match 1.1.1 module.
+ [Steve Henson]
+
+ *) Remove redundant features: hash file source, editing of test vectors
+ modify fipsld to use external fips_premain.c signature.
+ [Steve Henson]
+
+ *) New perl script mkfipsscr.pl to create shell scripts or batch files to
+ run algorithm test programs.
+ [Steve Henson]
+
+ *) Make algorithm test programs more tolerant of whitespace.
+ [Steve Henson]
+
+ *) Have SSL/TLS server implementation tolerate "mismatched" record
+ protocol version while receiving ClientHello even if the
+ ClientHello is fragmented. (The server can't insist on the
+ particular protocol version it has chosen before the ServerHello
+ message has informed the client about his choice.)
+ [Bodo Moeller]
+
+ *) Load error codes if they are not already present instead of using a
+ static variable. This allows them to be cleanly unloaded and reloaded.
+ [Steve Henson]
+
+ Changes between 0.9.7k and 0.9.7l [28 Sep 2006]
+
+ *) Introduce limits to prevent malicious keys being able to
+ cause a denial of service. (CVE-2006-2940)
+ [Steve Henson, Bodo Moeller]
+
+ *) Fix ASN.1 parsing of certain invalid structures that can result
+ in a denial of service. (CVE-2006-2937) [Steve Henson]
+
+ *) Fix buffer overflow in SSL_get_shared_ciphers() function.
+ (CVE-2006-3738) [Tavis Ormandy and Will Drewry, Google Security Team]
+
+ *) Fix SSL client code which could crash if connecting to a
+ malicious SSLv2 server. (CVE-2006-4343)
+ [Tavis Ormandy and Will Drewry, Google Security Team]
+
+ *) Change ciphersuite string processing so that an explicit
+ ciphersuite selects this one ciphersuite (so that "AES256-SHA"
+ will no longer include "AES128-SHA"), and any other similar
+ ciphersuite (same bitmap) from *other* protocol versions (so that
+ "RC4-MD5" will still include both the SSL 2.0 ciphersuite and the
+ SSL 3.0/TLS 1.0 ciphersuite). This is a backport combining
+ changes from 0.9.8b and 0.9.8d.
+ [Bodo Moeller]
+
+ Changes between 0.9.7j and 0.9.7k [05 Sep 2006]
+
+ *) Avoid PKCS #1 v1.5 signature attack discovered by Daniel Bleichenbacher
+ (CVE-2006-4339) [Ben Laurie and Google Security Team]
+
+ *) Change the Unix randomness entropy gathering to use poll() when
+ possible instead of select(), since the latter has some
+ undesirable limitations.
+ [Darryl Miles via Richard Levitte and Bodo Moeller]
+
+ *) Disable rogue ciphersuites:
+
+ - SSLv2 0x08 0x00 0x80 ("RC4-64-MD5")
+ - SSLv3/TLSv1 0x00 0x61 ("EXP1024-RC2-CBC-MD5")
+ - SSLv3/TLSv1 0x00 0x60 ("EXP1024-RC4-MD5")
+
+ The latter two were purportedly from
+ draft-ietf-tls-56-bit-ciphersuites-0[01].txt, but do not really
+ appear there.
+
+ Also deactive the remaining ciphersuites from
+ draft-ietf-tls-56-bit-ciphersuites-01.txt. These are just as
+ unofficial, and the ID has long expired.
+ [Bodo Moeller]
+
+ *) Fix RSA blinding Heisenbug (problems sometimes occured on
+ dual-core machines) and other potential thread-safety issues.
+ [Bodo Moeller]
+
+ Changes between 0.9.7i and 0.9.7j [04 May 2006]
+
+ *) Adapt fipsld and the build system to link against the validated FIPS
+ module in FIPS mode.
+ [Steve Henson]
+
+ *) Fixes for VC++ 2005 build under Windows.
+ [Steve Henson]
+
+ *) Add new Windows build target VC-32-GMAKE for VC++. This uses GNU make
+ from a Windows bash shell such as MSYS. It is autodetected from the
+ "config" script when run from a VC++ environment. Modify standard VC++
+ build to use fipscanister.o from the GNU make build.
+ [Steve Henson]
+
Changes between 0.9.7h and 0.9.7i [14 Oct 2005]
*) Wrapped the definition of EVP_MAX_MD_SIZE in a #ifdef OPENSSL_FIPS.
projects / oweals / openssl.git / blobdiff