+ Changes between 1.0.1 and 1.1.0 [xx XXX xxxx]
+
+ *) Add some FIPS mode restrictions to GCM. Add internal IV generator.
+ Update fips_gcmtest to use IV generator.
+ [Steve Henson]
+
+ *) Initial, experimental EVP support for AES-GCM. AAD can be input by
+ setting output buffer to NULL. The *Final function must be
+ called although it will not retrieve any additional data. The tag
+ can be set or retrieved with a ctrl. The IV length is by default 12
+ bytes (96 bits) but can be set to an alternative value. If the IV
+ length exceeds the maximum IV length (currently 16 bytes) it cannot be
+ set before the key.
+ [Steve Henson]
+
+ *) New flag in ciphers: EVP_CIPH_FLAG_CUSTOM_CIPHER. This means the
+ underlying do_cipher function handles all cipher semantics itself
+ including padding and finalisation. This is useful if (for example)
+ an ENGINE cipher handles block padding itself. The behaviour of
+ do_cipher is subtly changed if this flag is set: the return value
+ is the number of characters written to the output buffer (zero is
+ no longer an error code) or a negative error code. Also if the
+ input buffer is NULL and length 0 finalisation should be performed.
+ [Steve Henson]
+
+ *) If a candidate issuer certificate is already part of the constructed
+ path ignore it: new debug notification X509_V_ERR_PATH_LOOP for this case.
+ [Steve Henson]
+
+ *) Improve forward-security support: add functions
+
+ void SSL_CTX_set_not_resumable_session_callback(SSL_CTX *ctx, int (*cb)(SSL *ssl, int is_forward_secure))
+ void SSL_set_not_resumable_session_callback(SSL *ssl, int (*cb)(SSL *ssl, int is_forward_secure))
+
+ for use by SSL/TLS servers; the callback function will be called whenever a
+ new session is created, and gets to decide whether the session may be
+ cached to make it resumable (return 0) or not (return 1). (As by the
+ SSL/TLS protocol specifications, the session_id sent by the server will be
+ empty to indicate that the session is not resumable; also, the server will
+ not generate RFC 4507 (RFC 5077) session tickets.)
+
+ A simple reasonable callback implementation is to return is_forward_secure.
+ This parameter will be set to 1 or 0 depending on the ciphersuite selected
+ by the SSL/TLS server library, indicating whether it can provide forward
+ security.
+ [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
+
+ *) 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]
+
+ *) Use type ossl_ssize_t instad of ssize_t which isn't available on
+ all platforms. Move ssize_t definition from e_os.h to the public
+ header file e_os2.h as it now appears in public header file cms.h
+ [Steve Henson]
+
+ *) New function OPENSSL_gmtime_diff to find the difference in days
+ and seconds between two tm structures. This will be used to provide
+ additional functionality for ASN1_TIME.
+ [Steve Henson]
+
+ *) New -sigopt option to the ca, req and x509 utilities. Additional
+ signature parameters can be passed using this option and in
+ particular PSS.
+ [Steve Henson]
+
+ *) Add RSA PSS signing function. This will generate and set the
+ appropriate AlgorithmIdentifiers for PSS based on those in the
+ corresponding EVP_MD_CTX structure. No application support yet.
+ [Steve Henson]
+
+ *) Support for companion algorithm specific ASN1 signing routines.
+ New function ASN1_item_sign_ctx() signs a pre-initialised
+ EVP_MD_CTX structure and sets AlgorithmIdentifiers based on
+ the appropriate parameters.
+ [Steve Henson]
+
+ *) Add new algorithm specific ASN1 verification initialisation function
+ to EVP_PKEY_ASN1_METHOD: this is not in EVP_PKEY_METHOD since the ASN1
+ handling will be the same no matter what EVP_PKEY_METHOD is used.
+ Add a PSS handler to support verification of PSS signatures: checked
+ against a number of sample certificates.
+ [Steve Henson]
+
+ *) Add signature printing for PSS. Add PSS OIDs.
+ [Steve Henson, Martin Kaiser <lists@kaiser.cx>]
+
+ *) Add algorithm specific signature printing. An individual ASN1 method
+ can now print out signatures instead of the standard hex dump.
+
+ More complex signatures (e.g. PSS) can print out more meaningful
+ information. Include DSA version that prints out the signature
+ parameters r, s.
+ [Steve Henson]
+
+ *) Add -trusted_first option which attempts to find certificates in the
+ trusted store even if an untrusted chain is also supplied.
+ [Steve Henson]
+
+ *) Initial experimental support for explicitly trusted non-root CAs.
+ OpenSSL still tries to build a complete chain to a root but if an
+ intermediate CA has a trust setting included that is used. The first
+ setting is used: whether to trust or reject.
+ [Steve Henson]
+
+ *) New -verify_name option in command line utilities to set verification
+ parameters by name.
+ [Steve Henson]
+
+ *) Initial CMAC implementation. WARNING: EXPERIMENTAL, API MAY CHANGE.
+ Add CMAC pkey methods.
+ [Steve Henson]
+
+ *) Experiemental regnegotiation in s_server -www mode. If the client
+ browses /reneg connection is renegotiated. If /renegcert it is
+ renegotiated requesting a certificate.
+ [Steve Henson]
+
+ *) Add an "external" session cache for debugging purposes to s_server. This
+ should help trace issues which normally are only apparent in deployed
+ multi-process servers.
+ [Steve Henson]
+
+ *) Experiemental password based recipient info support for CMS library:
+ implementing RFC3211.
+ [Steve Henson]
+
+ *) Split password based encryption into PBES2 and PBKDF2 functions. This
+ neatly separates the code into cipher and PBE sections and is required
+ for some algorithms that split PBES2 into separate pieces (such as
+ password based CMS).
+ [Steve Henson]
+
+ *) Extensive audit of libcrypto with DEBUG_UNUSED. Fix many cases where
+ return value is ignored. NB. The functions RAND_add(), RAND_seed(),
+ BIO_set_cipher() and some obscure PEM functions were changed so they
+ can now return an error. The RAND changes required a change to the
+ RAND_METHOD structure.
+ [Steve Henson]
+
+ *) New macro __owur for "OpenSSL Warn Unused Result". This makes use of
+ a gcc attribute to warn if the result of a function is ignored. This
+ is enable if DEBUG_UNUSED is set. Add to several functions in evp.h
+ whose return value is often ignored.
+ [Steve Henson]
+
+ Changes between 1.0.0d and 1.0.1 [xx XXX xxxx]
+
+ *) Add functions to copy EVP_PKEY_METHOD and retrieve flags and id.
+ [Steve Henson]
+
+ *) Add EC_GFp_nistp224_method(), a 64-bit optimized implementation for
+ elliptic curve NIST-P224 with constant-time single point multiplication on
+ typical inputs. EC_GROUP_new_by_curve_name() will automatically use this
+ (while EC_GROUP_new_curve_GFp() currently won't and prefers the more
+ flexible implementations).
+
+ The implementation requires support for the nonstandard type __uint128_t,
+ and so is disabled by default. To include this in your build of OpenSSL,
+ use -DEC_NISTP224_64_GCC_128 on the Configure (or config) command line,
+ and run "make depend" (or "make update").
+ [Emilia Käsper <emilia.kasper@esat.kuleuven.be> (Google)]
+
+ *) Permit abbreviated handshakes when renegotiating using the function
+ SSL_renegotiate_abbreviated().
+ [Robin Seggelmann <seggelmann@fh-muenster.de>]
+
+ *) Add call to ENGINE_register_all_complete() to
+ ENGINE_load_builtin_engines(), so some implementations get used
+ automatically instead of needing explicit application support.
+ [Steve Henson]
+
+ *) Add support for TLS key exporter as described in RFC5705.
+ [Robin Seggelmann <seggelmann@fh-muenster.de>, Steve Henson]
+
+ *) Initial TLSv1.1 support. Since TLSv1.1 is very similar to TLS v1.0 only
+ a few changes are required:
+
+ Add SSL_OP_NO_TLSv1_1 flag.
+ Add TLSv1_1 methods.
+ Update version checking logic to handle version 1.1.
+ Add explicit IV handling (ported from DTLS code).
+ Add command line options to s_client/s_server.
+ [Steve Henson]
+
+ Changes between 1.0.0c and 1.0.0d [8 Feb 2011]
+
+ *) Fix parsing of OCSP stapling ClientHello extension. CVE-2011-0014
+ [Neel Mehta, Adam Langley, Bodo Moeller (Google)]
+
+ *) Fix bug in string printing code: if *any* escaping is enabled we must
+ escape the escape character (backslash) or the resulting string is
+ ambiguous.
+ [Steve Henson]
+
+ Changes between 1.0.0b and 1.0.0c [2 Dec 2010]
+
+ *) Disable code workaround for ancient and obsolete Netscape browsers
+ and servers: an attacker can use it in a ciphersuite downgrade attack.
+ Thanks to Martin Rex for discovering this bug. CVE-2010-4180
+ [Steve Henson]
+
+ *) Fixed J-PAKE implementation error, originally discovered by
+ Sebastien Martini, further info and confirmation from Stefan
+ Arentz and Feng Hao. Note that this fix is a security fix. CVE-2010-4252
+ [Ben Laurie]
+
+ Changes between 1.0.0a and 1.0.0b [16 Nov 2010]
+
+ *) Fix extension code to avoid race conditions which can result in a buffer
+ overrun vulnerability: resumed sessions must not be modified as they can
+ be shared by multiple threads. CVE-2010-3864
+ [Steve Henson]
+
+ *) Fix WIN32 build system to correctly link an ENGINE directory into
+ a DLL.
+ [Steve Henson]
+
+ Changes between 1.0.0 and 1.0.0a [01 Jun 2010]
+
+ *) Check return value of int_rsa_verify in pkey_rsa_verifyrecover
+ (CVE-2010-1633)
+ [Steve Henson, Peter-Michael Hager <hager@dortmund.net>]
+
+ Changes between 0.9.8n and 1.0.0 [29 Mar 2010]
+
+ *) Add "missing" function EVP_CIPHER_CTX_copy(). This copies a cipher
+ context. The operation can be customised via the ctrl mechanism in
+ case ENGINEs want to include additional functionality.
+ [Steve Henson]
+
+ *) Tolerate yet another broken PKCS#8 key format: private key value negative.
+ [Steve Henson]
+
+ *) Add new -subject_hash_old and -issuer_hash_old options to x509 utility to
+ output hashes compatible with older versions of OpenSSL.
+ [Willy Weisz <weisz@vcpc.univie.ac.at>]
+
+ *) Fix compression algorithm handling: if resuming a session use the
+ compression algorithm of the resumed session instead of determining
+ it from client hello again. Don't allow server to change algorithm.
+ [Steve Henson]
+
+ *) Add load_crls() function to apps tidying load_certs() too. Add option
+ to verify utility to allow additional CRLs to be included.
+ [Steve Henson]
+
+ *) Update OCSP request code to permit adding custom headers to the request:
+ some responders need this.
+ [Steve Henson]
+
+ *) The function EVP_PKEY_sign() returns <=0 on error: check return code
+ correctly.
+ [Julia Lawall <julia@diku.dk>]
+
+ *) Update verify callback code in apps/s_cb.c and apps/verify.c, it
+ needlessly dereferenced structures, used obsolete functions and
+ didn't handle all updated verify codes correctly.
+ [Steve Henson]
+
+ *) Disable MD2 in the default configuration.
+ [Steve Henson]
+
+ *) In BIO_pop() and BIO_push() use the ctrl argument (which was NULL) to
+ indicate the initial BIO being pushed or popped. This makes it possible
+ to determine whether the BIO is the one explicitly called or as a result
+ of the ctrl being passed down the chain. Fix BIO_pop() and SSL BIOs so
+ it handles reference counts correctly and doesn't zero out the I/O bio
+ when it is not being explicitly popped. WARNING: applications which
+ included workarounds for the old buggy behaviour will need to be modified
+ or they could free up already freed BIOs.
+ [Steve Henson]
+
+ *) Extend the uni2asc/asc2uni => OPENSSL_uni2asc/OPENSSL_asc2uni
+ renaming to all platforms (within the 0.9.8 branch, this was
+ done conditionally on Netware platforms to avoid a name clash).
+ [Guenter <lists@gknw.net>]
+
+ *) Add ECDHE and PSK support to DTLS.
+ [Michael Tuexen <tuexen@fh-muenster.de>]
+
+ *) Add CHECKED_STACK_OF macro to safestack.h, otherwise safestack can't
+ be used on C++.
+ [Steve Henson]
+
+ *) Add "missing" function EVP_MD_flags() (without this the only way to
+ retrieve a digest flags is by accessing the structure directly. Update
+ EVP_MD_do_all*() and EVP_CIPHER_do_all*() to include the name a digest
+ or cipher is registered as in the "from" argument. Print out all
+ registered digests in the dgst usage message instead of manually
+ attempting to work them out.
+ [Steve Henson]
+
+ *) If no SSLv2 ciphers are used don't use an SSLv2 compatible client hello:
+ this allows the use of compression and extensions. Change default cipher
+ string to remove SSLv2 ciphersuites. This effectively avoids ancient SSLv2
+ by default unless an application cipher string requests it.
+ [Steve Henson]
+
+ *) Alter match criteria in PKCS12_parse(). It used to try to use local
+ key ids to find matching certificates and keys but some PKCS#12 files
+ don't follow the (somewhat unwritten) rules and this strategy fails.
+ Now just gather all certificates together and the first private key
+ then look for the first certificate that matches the key.
+ [Steve Henson]
+
+ *) Support use of registered digest and cipher names for dgst and cipher
+ commands instead of having to add each one as a special case. So now
+ you can do:
+
+ openssl sha256 foo
+
+ as well as:
+
+ openssl dgst -sha256 foo
+
+ and this works for ENGINE based algorithms too.
+
+ [Steve Henson]
+
+ *) Update Gost ENGINE to support parameter files.
+ [Victor B. Wagner <vitus@cryptocom.ru>]
+
+ *) Support GeneralizedTime in ca utility.
+ [Oliver Martin <oliver@volatilevoid.net>, Steve Henson]
+
+ *) Enhance the hash format used for certificate directory links. The new
+ form uses the canonical encoding (meaning equivalent names will work
+ even if they aren't identical) and uses SHA1 instead of MD5. This form
+ is incompatible with the older format and as a result c_rehash should
+ be used to rebuild symbolic links.
+ [Steve Henson]
+
+ *) Make PKCS#8 the default write format for private keys, replacing the
+ traditional format. This form is standardised, more secure and doesn't
+ include an implicit MD5 dependency.
+ [Steve Henson]
+
+ *) Add a $gcc_devteam_warn option to Configure. The idea is that any code
+ committed to OpenSSL should pass this lot as a minimum.
+ [Steve Henson]
+
+ *) Add session ticket override functionality for use by EAP-FAST.
+ [Jouni Malinen <j@w1.fi>]
+
+ *) Modify HMAC functions to return a value. Since these can be implemented
+ in an ENGINE errors can occur.
+ [Steve Henson]
+
+ *) Type-checked OBJ_bsearch_ex.
+ [Ben Laurie]
+
+ *) Type-checked OBJ_bsearch. Also some constification necessitated
+ by type-checking. Still to come: TXT_DB, bsearch(?),
+ OBJ_bsearch_ex, qsort, CRYPTO_EX_DATA, ASN1_VALUE, ASN1_STRING,
+ CONF_VALUE.
+ [Ben Laurie]
+
+ *) New function OPENSSL_gmtime_adj() to add a specific number of days and
+ seconds to a tm structure directly, instead of going through OS
+ specific date routines. This avoids any issues with OS routines such
+ as the year 2038 bug. New *_adj() functions for ASN1 time structures
+ and X509_time_adj_ex() to cover the extended range. The existing
+ X509_time_adj() is still usable and will no longer have any date issues.
+ [Steve Henson]
+
+ *) Delta CRL support. New use deltas option which will attempt to locate
+ and search any appropriate delta CRLs available.
+
+ This work was sponsored by Google.
+ [Steve Henson]
+
+ *) Support for CRLs partitioned by reason code. Reorganise CRL processing
+ code and add additional score elements. Validate alternate CRL paths
+ as part of the CRL checking and indicate a new error "CRL path validation
+ error" in this case. Applications wanting additional details can use
+ the verify callback and check the new "parent" field. If this is not
+ NULL CRL path validation is taking place. Existing applications wont
+ see this because it requires extended CRL support which is off by
+ default.
+
+ This work was sponsored by Google.
+ [Steve Henson]
+
+ *) Support for freshest CRL extension.
+
+ This work was sponsored by Google.
+ [Steve Henson]
+
+ *) Initial indirect CRL support. Currently only supported in the CRLs
+ passed directly and not via lookup. Process certificate issuer
+ CRL entry extension and lookup CRL entries by bother issuer name
+ and serial number. Check and process CRL issuer entry in IDP extension.
+
+ This work was sponsored by Google.
+ [Steve Henson]
+
+ *) Add support for distinct certificate and CRL paths. The CRL issuer
+ certificate is validated separately in this case. Only enabled if
+ an extended CRL support flag is set: this flag will enable additional
+ CRL functionality in future.
+
+ This work was sponsored by Google.
+ [Steve Henson]
+
+ *) Add support for policy mappings extension.
+
+ This work was sponsored by Google.
+ [Steve Henson]
+
+ *) Fixes to pathlength constraint, self issued certificate handling,
+ policy processing to align with RFC3280 and PKITS tests.
+
+ This work was sponsored by Google.
+ [Steve Henson]
+
+ *) Support for name constraints certificate extension. DN, email, DNS
+ and URI types are currently supported.
+
+ This work was sponsored by Google.
+ [Steve Henson]
+
+ *) To cater for systems that provide a pointer-based thread ID rather
+ than numeric, deprecate the current numeric thread ID mechanism and
+ replace it with a structure and associated callback type. This
+ mechanism allows a numeric "hash" to be extracted from a thread ID in
+ either case, and on platforms where pointers are larger than 'long',
+ mixing is done to help ensure the numeric 'hash' is usable even if it
+ can't be guaranteed unique. The default mechanism is to use "&errno"
+ as a pointer-based thread ID to distinguish between threads.
+
+ Applications that want to provide their own thread IDs should now use
+ CRYPTO_THREADID_set_callback() to register a callback that will call
+ either CRYPTO_THREADID_set_numeric() or CRYPTO_THREADID_set_pointer().
+
+ Note that ERR_remove_state() is now deprecated, because it is tied
+ to the assumption that thread IDs are numeric. ERR_remove_state(0)
+ to free the current thread's error state should be replaced by
+ ERR_remove_thread_state(NULL).
+
+ (This new approach replaces the functions CRYPTO_set_idptr_callback(),
+ CRYPTO_get_idptr_callback(), and CRYPTO_thread_idptr() that existed in
+ OpenSSL 0.9.9-dev between June 2006 and August 2008. Also, if an
+ application was previously providing a numeric thread callback that
+ was inappropriate for distinguishing threads, then uniqueness might
+ have been obtained with &errno that happened immediately in the
+ intermediate development versions of OpenSSL; this is no longer the
+ case, the numeric thread callback will now override the automatic use
+ of &errno.)
+ [Geoff Thorpe, with help from Bodo Moeller]
+
+ *) Initial support for different CRL issuing certificates. This covers a
+ simple case where the self issued certificates in the chain exist and
+ the real CRL issuer is higher in the existing chain.
+
+ This work was sponsored by Google.
+ [Steve Henson]
+
+ *) Removed effectively defunct crypto/store from the build.
+ [Ben Laurie]
+
+ *) Revamp of STACK to provide stronger type-checking. Still to come:
+ TXT_DB, bsearch(?), OBJ_bsearch, qsort, CRYPTO_EX_DATA, ASN1_VALUE,
+ ASN1_STRING, CONF_VALUE.
+ [Ben Laurie]
+
+ *) Add a new SSL_MODE_RELEASE_BUFFERS mode flag to release unused buffer
+ RAM on SSL connections. This option can save about 34k per idle SSL.
+ [Nick Mathewson]
+
+ *) Revamp of LHASH to provide stronger type-checking. Still to come:
+ STACK, TXT_DB, bsearch, qsort.
+ [Ben Laurie]
+
+ *) Initial support for Cryptographic Message Syntax (aka CMS) based
+ on RFC3850, RFC3851 and RFC3852. New cms directory and cms utility,
+ support for data, signedData, compressedData, digestedData and
+ encryptedData, envelopedData types included. Scripts to check against
+ RFC4134 examples draft and interop and consistency checks of many
+ content types and variants.
+ [Steve Henson]
+
+ *) Add options to enc utility to support use of zlib compression BIO.
+ [Steve Henson]