CHANGES

  *) Made a variety of little tweaks to the ENGINE code.
     - "atalla" and "ubsec" string definitions were moved from header files
       to C code. "nuron" string definitions were placed in variables
       rather than hard-coded - allowing parameterisation of these values
       later on via ctrl() commands.
     - Removed unused "#if 0"'d code.
     - Fixed engine list iteration code so it uses ENGINE_free() to release
       structural references.
     - Constified the RAND_METHOD element of ENGINE structures.
     - Constified various get/set functions as appropriate and added
       missing functions (including a catch-all ENGINE_cpy that duplicates
       all ENGINE values onto a new ENGINE except reference counts/state).
     - Removed NULL parameter checks in get/set functions. Setting a method
       or function to NULL is a way of cancelling out a previously set
       value.  Passing a NULL ENGINE parameter is just plain stupid anyway
       and doesn't justify the extra error symbols and code.
     - Deprecate the ENGINE_FLAGS_MALLOCED define and move the area for
       flags from engine_int.h to engine.h.
     - Changed prototypes for ENGINE handler functions (init(), finish(),
       ctrl(), key-load functions, etc) to take an (ENGINE*) parameter.
     [Geoff]

  *) Implement binary inversion algorithm for BN_mod_inverse in addition
     to the algorithm using long division.  The binary algorithm can be
     used only if the modulus is odd.  On 32-bit systems, it is faster
     only for relatively small moduli (roughly 20-30% for 128-bit moduli,
     roughly 5-15% for 256-bit moduli), so we use it only for moduli
     up to 450 bits.  In 64-bit environments, the binary algorithm
     appears to be advantageous for much longer moduli; here we use it
     for moduli up to 2048 bits.
     [Bodo Moeller]

  *) Rewrite CHOICE field setting in ASN1_item_ex_d2i(). The old code
     could not support the combine flag in choice fields.
     [Steve Henson]

  *) Add a 'copy_extensions' option to the 'ca' utility. This copies
     extensions from a certificate request to the certificate.
     [Steve Henson]

  *) Allow multiple 'certopt' and 'nameopt' options to be separated
     by commas. Add 'namopt' and 'certopt' options to the 'ca' config
     file: this allows the display of the certificate about to be
     signed to be customised, to allow certain fields to be included
     or excluded and extension details. The old system didn't display
     multicharacter strings properly, omitted fields not in the policy
     and couldn't display additional details such as extensions.
     [Steve Henson]

  *) Function EC_POINTs_mul for multiple scalar multiplication
     of an arbitrary number of elliptic curve points
          \sum scalars[i]*points[i],
     optionally including the generator defined for the EC_GROUP:
          scalar*generator +  \sum scalars[i]*points[i].

     EC_POINT_mul is a simple wrapper function for the typical case
     that the point list has just one item (besides the optional
     generator).
     [Bodo Moeller]

  *) First EC_METHODs for curves over GF(p):

     EC_GFp_simple_method() uses the basic BN_mod_mul and BN_mod_sqr
     operations and provides various method functions that can also
     operate with faster implementations of modular arithmetic.     

     EC_GFp_mont_method() reuses most functions that are part of
     EC_GFp_simple_method, but uses Montgomery arithmetic.

     [Bodo Moeller; point addition and point doubling
     implementation directly derived from source code provided by
     Lenka Fibikova <fibikova@exp-math.uni-essen.de>]

  *) Framework for elliptic curves (crypto/ec/ec.h, crypto/ec/ec_lcl.h,
     crypto/ec/ec_lib.c):

     Curves are EC_GROUP objects (with an optional group generator)
     based on EC_METHODs that are built into the library.

     Points are EC_POINT objects based on EC_GROUP objects.

     Most of the framework would be able to handle curves over arbitrary
     finite fields, but as there are no obvious types for fields other
     than GF(p), some functions are limited to that for now.
     [Bodo Moeller]

  *) Add the -HTTP option to s_server.  It is similar to -WWW, but requires
     that the file contains a complete HTTP response.
     [Richard Levitte]

  *) Add the ec directory to mkdef.pl and mkfiles.pl. In mkdef.pl
     change the def and num file printf format specifier from "%-40sXXX"
     to "%-39s XXX". The latter will always guarantee a space after the
     field while the former will cause them to run together if the field
     is 40 of more characters long.
     [Steve Henson]

  *) Constify the cipher and digest 'method' functions and structures
     and modify related functions to take constant EVP_MD and EVP_CIPHER
     pointers.
     [Steve Henson]

  *) Hide BN_CTX structure details in bn_lcl.h instead of publishing them
     in <openssl/bn.h>.  Also further increase BN_CTX_NUM to 32.
     [Bodo Moeller]

  *) Modify EVP_Digest*() routines so they now return values. Although the
     internal software routines can never fail additional hardware versions
     might.
     [Steve Henson]

  *) Clean up crypto/err/err.h and change some error codes to avoid conflicts:

     Previously ERR_R_FATAL was too small and coincided with ERR_LIB_PKCS7
     (= ERR_R_PKCS7_LIB); it is now 64 instead of 32.

     ASN1 error codes
          ERR_R_NESTED_ASN1_ERROR
          ...
          ERR_R_MISSING_ASN1_EOS
     were 4 .. 9, conflicting with
          ERR_LIB_RSA (= ERR_R_RSA_LIB)
          ...
          ERR_LIB_PEM (= ERR_R_PEM_LIB).
     They are now 58 .. 63 (i.e., just below ERR_R_FATAL).

     Add new error code 'ERR_R_INTERNAL_ERROR'.
     [Bodo Moeller]

  *) Don't overuse locks in crypto/err/err.c: For data retrieval, CRYPTO_r_lock
     suffices.
     [Bodo Moeller]

  *) New option '-subj arg' for 'openssl req' and 'openssl ca'.  This
     sets the subject name for a new request or supersedes the
     subject name in a given request. Formats that can be parsed are
          'CN=Some Name, OU=myOU, C=IT'
     and
          'CN=Some Name/OU=myOU/C=IT'.

     Add options '-batch' and '-verbose' to 'openssl req'.
     [Massimiliano Pala <madwolf@hackmasters.net>]

  *) Introduce the possibility to access global variables through
     functions on platform were that's the best way to handle exporting
     global variables in shared libraries.  To enable this functionality,
     one must configure with "EXPORT_VAR_AS_FN" or defined the C macro
     "OPENSSL_EXPORT_VAR_AS_FUNCTION" in crypto/opensslconf.h (the latter
     is normally done by Configure or something similar).

     To implement a global variable, use the macro OPENSSL_IMPLEMENT_GLOBAL
     in the source file (foo.c) like this:

	OPENSSL_IMPLEMENT_GLOBAL(int,foo)=1;
	OPENSSL_IMPLEMENT_GLOBAL(double,bar);

     To declare a global variable, use the macros OPENSSL_DECLARE_GLOBAL
     and OPENSSL_GLOBAL_REF in the header file (foo.h) like this:

	OPENSSL_DECLARE_GLOBAL(int,foo);
	#define foo OPENSSL_GLOBAL_REF(foo)
	OPENSSL_DECLARE_GLOBAL(double,bar);
	#define bar OPENSSL_GLOBAL_REF(bar)

     The #defines are very important, and therefore so is including the
     header file everywhere where the defined globals are used.

     The macro OPENSSL_EXPORT_VAR_AS_FUNCTION also affects the definition
     of ASN.1 items, but that structure is a bit different.

     The largest change is in util/mkdef.pl which has been enhanced with
     better and easier to understand logic to choose which symbols should
     go into the Windows .def files as well as a number of fixes and code
     cleanup (among others, algorithm keywords are now sorted
     lexicographically to avoid constant rewrites).
     [Richard Levitte]

  *) In BN_div() keep a copy of the sign of 'num' before writing the
     result to 'rm' because if rm==num the value will be overwritten
     and produce the wrong result if 'num' is negative: this caused
     problems with BN_mod() and BN_nnmod().
     [Steve Henson]

  *) Function OCSP_request_verify(). This checks the signature on an
     OCSP request and verifies the signer certificate. The signer
     certificate is just checked for a generic purpose and OCSP request
     trust settings.
     [Steve Henson]

  *) Add OCSP_check_validity() function to check the validity of OCSP
     responses. OCSP responses are prepared in real time and may only
     be a few seconds old. Simply checking that the current time lies
     between thisUpdate and nextUpdate max reject otherwise valid responses
     caused by either OCSP responder or client clock inaccuracy. Instead
     we allow thisUpdate and nextUpdate to fall within a certain period of
     the current time. The age of the response can also optionally be
     checked. Two new options -validity_period and -status_age added to
     ocsp utility.
     [Steve Henson]

  *) If signature or public key algorithm is unrecognized print out its
     OID rather that just UNKNOWN.
     [Steve Henson]

  *) Change OCSP_cert_to_id() to tolerate a NULL subject certificate and
     OCSP_cert_id_new() a NULL serialNumber. This allows a partial certificate
     ID to be generated from the issuer certificate alone which can then be
     passed to OCSP_id_issuer_cmp().
     [Steve Henson]

  *) New compilation option ASN1_ITEM_FUNCTIONS. This causes the new
     ASN1 modules to export functions returning ASN1_ITEM pointers
     instead of the ASN1_ITEM structures themselves. This adds several
     new macros which allow the underlying ASN1 function/structure to
     be accessed transparently. As a result code should not use ASN1_ITEM
     references directly (such as &X509_it) but instead use the relevant
     macros (such as ASN1_ITEM_rptr(X509)). This option is to allow
     use of the new ASN1 code on platforms where exporting structures
     is problematical (for example in shared libraries) but exporting
     functions returning pointers to structures is not.
     [Steve Henson]

  *) Add support for overriding the generation of SSL/TLS session IDs.
     These callbacks can be registered either in an SSL_CTX or per SSL.
     The purpose of this is to allow applications to control, if they wish,
     the arbitrary values chosen for use as session IDs, particularly as it
     can be useful for session caching in multiple-server environments. A
     command-line switch for testing this (and any client code that wishes
     to use such a feature) has been added to "s_server".
     [Geoff Thorpe, Lutz Jaenicke]

  *) Modify mkdef.pl to recognise and parse preprocessor conditionals
     of the form '#if defined(...) || defined(...) || ...' and
     '#if !defined(...) && !defined(...) && ...'.  This also avoids
     the growing number of special cases it was previously handling.
     [Richard Levitte]

  *) Make all configuration macros available for application by making
     sure they are available in opensslconf.h, by giving them names starting
     with "OPENSSL_" to avoid conflicts with other packages and by making
     sure e_os2.h will cover all platform-specific cases together with
     opensslconf.h.
     Additionally, it is now possible to define configuration/platform-
     specific names (called "system identities").  In the C code, these
     are prefixed with "OPENSSL_SYSNAME_".  e_os2.h will create another
     macro with the name beginning with "OPENSSL_SYS_", which is determined
     from "OPENSSL_SYSNAME_*" or compiler-specific macros depending on
     what is available.
     [Richard Levitte]

  *) New option -set_serial to 'req' and 'x509' this allows the serial
     number to use to be specified on the command line. Previously self
     signed certificates were hard coded with serial number 0 and the 
     CA options of 'x509' had to use a serial number in a file which was
     auto incremented.
     [Steve Henson]

  *) New options to 'ca' utility to support V2 CRL entry extensions.
     Currently CRL reason, invalidity date and hold instruction are
     supported. Add new CRL extensions to V3 code and some new objects.
     [Steve Henson]

  *) New function EVP_CIPHER_CTX_set_padding() this is used to
     disable standard block padding (aka PKCS#5 padding) in the EVP
     API, which was previously mandatory. This means that the data is
     not padded in any way and so the total length much be a multiple
     of the block size, otherwise an error occurs.
     [Steve Henson]

  *) Initial (incomplete) OCSP SSL support.
     [Steve Henson]

  *) New function OCSP_parse_url(). This splits up a URL into its host,
     port and path components: primarily to parse OCSP URLs. New -url
     option to ocsp utility.
     [Steve Henson]

  *) New nonce behavior. The return value of OCSP_check_nonce() now 
     reflects the various checks performed. Applications can decide
     whether to tolerate certain situations such as an absent nonce
     in a response when one was present in a request: the ocsp application
     just prints out a warning. New function OCSP_add1_basic_nonce()
     this is to allow responders to include a nonce in a response even if
     the request is nonce-less.
     [Steve Henson]

  *) Disable stdin buffering in load_cert (apps/apps.c) so that no certs are
     skipped when using openssl x509 multiple times on a single input file,
     e.g. "(openssl x509 -out cert1; openssl x509 -out cert2) <certs".
     [Bodo Moeller]

  *) Make ASN1_UTCTIME_set_string() and ASN1_GENERALIZEDTIME_set_string()
     set string type: to handle setting ASN1_TIME structures. Fix ca
     utility to correctly initialize revocation date of CRLs.
     [Steve Henson]

  *) New option SSL_OP_CIPHER_SERVER_PREFERENCE allows the server to override
     the clients preferred ciphersuites and rather use its own preferences.
     Should help to work around M$ SGC (Server Gated Cryptography) bug in
     Internet Explorer by ensuring unchanged hash method during stepup.
     (Also replaces the broken/deactivated SSL_OP_NON_EXPORT_FIRST option.)
     [Lutz Jaenicke]

  *) Make mkdef.pl recognise all DECLARE_ASN1 macros, change rijndael
     to aes and add a new 'exist' option to print out symbols that don't
     appear to exist.
     [Steve Henson]

  *) Additional options to ocsp utility to allow flags to be set and
     additional certificates supplied.
     [Steve Henson]

  *) Add the option -VAfile to 'openssl ocsp', so the user can give the
     OCSP client a number of certificate to only verify the response
     signature against.
     [Richard Levitte]

  *) Update Rijndael code to version 3.0 and change EVP AES ciphers to
     handle the new API. Currently only ECB, CBC modes supported. Add new
     AES OIDs.

     Add TLS AES ciphersuites as described in RFC3268, "Advanced
     Encryption Standard (AES) Ciphersuites for Transport Layer
     Security (TLS)".  (In beta versions of OpenSSL 0.9.7, these were
     not enabled by default and were not part of the "ALL" ciphersuite
     alias because they were not yet official; they could be
     explicitly requested by specifying the "AESdraft" ciphersuite
     group alias.  In the final release of OpenSSL 0.9.7, the group
     alias is called "AES" and is part of "ALL".)
     [Ben Laurie, Steve  Henson, Bodo Moeller]

  *) New function OCSP_copy_nonce() to copy nonce value (if present) from
     request to response.
     [Steve Henson]

  *) Functions for OCSP responders. OCSP_request_onereq_count(),
     OCSP_request_onereq_get0(), OCSP_onereq_get0_id() and OCSP_id_get0_info()
     extract information from a certificate request. OCSP_response_create()
     creates a response and optionally adds a basic response structure.
     OCSP_basic_add1_status() adds a complete single response to a basic
     response and returns the OCSP_SINGLERESP structure just added (to allow
     extensions to be included for example). OCSP_basic_add1_cert() adds a
     certificate to a basic response and OCSP_basic_sign() signs a basic
     response with various flags. New helper functions ASN1_TIME_check()
     (checks validity of ASN1_TIME structure) and ASN1_TIME_to_generalizedtime()
     (converts ASN1_TIME to GeneralizedTime).
     [Steve Henson]

  *) Various new functions. EVP_Digest() combines EVP_Digest{Init,Update,Final}()
     in a single operation. X509_get0_pubkey_bitstr() extracts the public_key
     structure from a certificate. X509_pubkey_digest() digests the public_key
     contents: this is used in various key identifiers. 
     [Steve Henson]

  *) Make sk_sort() tolerate a NULL argument.
     [Steve Henson reported by Massimiliano Pala <madwolf@comune.modena.it>]

  *) New OCSP verify flag OCSP_TRUSTOTHER. When set the "other" certificates
     passed by the function are trusted implicitly. If any of them signed the
     response then it is assumed to be valid and is not verified.
     [Steve Henson]

  *) In PKCS7_set_type() initialise content_type in PKCS7_ENC_CONTENT
     to data. This was previously part of the PKCS7 ASN1 code. This
     was causing problems with OpenSSL created PKCS#12 and PKCS#7 structures.
     [Steve Henson, reported by Kenneth R. Robinette
				<support@securenetterm.com>]

  *) Add CRYPTO_push_info() and CRYPTO_pop_info() calls to new ASN1
     routines: without these tracing memory leaks is very painful.
     Fix leaks in PKCS12 and PKCS7 routines.
     [Steve Henson]

  *) Make X509_time_adj() cope with the new behaviour of ASN1_TIME_new().
     Previously it initialised the 'type' argument to V_ASN1_UTCTIME which
     effectively meant GeneralizedTime would never be used. Now it
     is initialised to -1 but X509_time_adj() now has to check the value
     and use ASN1_TIME_set() if the value is not V_ASN1_UTCTIME or
     V_ASN1_GENERALIZEDTIME, without this it always uses GeneralizedTime.
     [Steve Henson, reported by Kenneth R. Robinette
				<support@securenetterm.com>]

  *) Fixes to BN_to_ASN1_INTEGER when bn is zero. This would previously
     result in a zero length in the ASN1_INTEGER structure which was
     not consistent with the structure when d2i_ASN1_INTEGER() was used
     and would cause ASN1_INTEGER_cmp() to fail. Enhance s2i_ASN1_INTEGER()
     to cope with hex and negative integers. Fix bug in i2a_ASN1_INTEGER()
     where it did not print out a minus for negative ASN1_INTEGER.
     [Steve Henson]

  *) Add summary printout to ocsp utility. The various functions which
     convert status values to strings have been renamed to:
     OCSP_response_status_str(), OCSP_cert_status_str() and
     OCSP_crl_reason_str() and are no longer static. New options
     to verify nonce values and to disable verification. OCSP response
     printout format cleaned up.
     [Steve Henson]

  *) Add additional OCSP certificate checks. These are those specified
     in RFC2560. This consists of two separate checks: the CA of the
     certificate being checked must either be the OCSP signer certificate
     or the issuer of the OCSP signer certificate. In the latter case the
     OCSP signer certificate must contain the OCSP signing extended key
     usage. This check is performed by attempting to match the OCSP
     signer or the OCSP signer CA to the issuerNameHash and issuerKeyHash
     in the OCSP_CERTID structures of the response.
     [Steve Henson]

  *) Initial OCSP certificate verification added to OCSP_basic_verify()
     and related routines. This uses the standard OpenSSL certificate
     verify routines to perform initial checks (just CA validity) and
     to obtain the certificate chain. Then additional checks will be
     performed on the chain. Currently the root CA is checked to see
     if it is explicitly trusted for OCSP signing. This is used to set
     a root CA as a global signing root: that is any certificate that
     chains to that CA is an acceptable OCSP signing certificate.
     [Steve Henson]

  *) New '-extfile ...' option to 'openssl ca' for reading X.509v3
     extensions from a separate configuration file.
     As when reading extensions from the main configuration file,
     the '-extensions ...' option may be used for specifying the
     section to use.
     [Massimiliano Pala <madwolf@comune.modena.it>]

  *) New OCSP utility. Allows OCSP requests to be generated or
     read. The request can be sent to a responder and the output
     parsed, outputed or printed in text form. Not complete yet:
     still needs to check the OCSP response validity.
     [Steve Henson]

  *) New subcommands for 'openssl ca':
     'openssl ca -status <serial>' prints the status of the cert with
     the given serial number (according to the index file).
     'openssl ca -updatedb' updates the expiry status of certificates
     in the index file.
     [Massimiliano Pala <madwolf@comune.modena.it>]

  *) New '-newreq-nodes' command option to CA.pl.  This is like
     '-newreq', but calls 'openssl req' with the '-nodes' option
     so that the resulting key is not encrypted.
     [Damien Miller <djm@mindrot.org>]

  *) New configuration for the GNU Hurd.
     [Jonathan Bartlett <johnnyb@wolfram.com> via Richard Levitte]

  *) Initial code to implement OCSP basic response verify. This
     is currently incomplete. Currently just finds the signer's
     certificate and verifies the signature on the response.
     [Steve Henson]

  *) New SSLeay_version code SSLEAY_DIR to determine the compiled-in
     value of OPENSSLDIR.  This is available via the new '-d' option
     to 'openssl version', and is also included in 'openssl version -a'.
     [Bodo Moeller]

  *) Allowing defining memory allocation callbacks that will be given
     file name and line number information in additional arguments
     (a const char* and an int).  The basic functionality remains, as
     well as the original possibility to just replace malloc(),
     realloc() and free() by functions that do not know about these
     additional arguments.  To register and find out the current
     settings for extended allocation functions, the following
     functions are provided:

	CRYPTO_set_mem_ex_functions
	CRYPTO_set_locked_mem_ex_functions
	CRYPTO_get_mem_ex_functions
	CRYPTO_get_locked_mem_ex_functions

     These work the same way as CRYPTO_set_mem_functions and friends.
     CRYPTO_get_[locked_]mem_functions now writes 0 where such an
     extended allocation function is enabled.
     Similarly, CRYPTO_get_[locked_]mem_ex_functions writes 0 where
     a conventional allocation function is enabled.
     [Richard Levitte, Bodo Moeller]

  *) Finish off removing the remaining LHASH function pointer casts.
     There should no longer be any prototype-casting required when using
     the LHASH abstraction, and any casts that remain are "bugs". See
     the callback types and macros at the head of lhash.h for details
     (and "OBJ_cleanup" in crypto/objects/obj_dat.c as an example).
     [Geoff Thorpe]

  *) Add automatic query of EGD sockets in RAND_poll() for the unix variant.
     If /dev/[u]random devices are not available or do not return enough
     entropy, EGD style sockets (served by EGD or PRNGD) will automatically
     be queried.
     The locations /var/run/egd-pool, /dev/egd-pool, /etc/egd-pool, and
     /etc/entropy will be queried once each in this sequence, quering stops
     when enough entropy was collected without querying more sockets.
     [Lutz Jaenicke]

  *) Change the Unix RAND_poll() variant to be able to poll several
     random devices, as specified by DEVRANDOM, until a sufficient amount
     of data has been collected.   We spend at most 10 ms on each file
     (select timeout) and read in non-blocking mode.  DEVRANDOM now
     defaults to the list "/dev/urandom", "/dev/random", "/dev/srandom"
     (previously it was just the string "/dev/urandom"), so on typical
     platforms the 10 ms delay will never occur.
     Also separate out the Unix variant to its own file, rand_unix.c.
     For VMS, there's a currently-empty rand_vms.c.
     [Richard Levitte]

  *) Move OCSP client related routines to ocsp_cl.c. These
     provide utility functions which an application needing
     to issue a request to an OCSP responder and analyse the
     response will typically need: as opposed to those which an
     OCSP responder itself would need which will be added later.

     OCSP_request_sign() signs an OCSP request with an API similar
     to PKCS7_sign(). OCSP_response_status() returns status of OCSP
     response. OCSP_response_get1_basic() extracts basic response
     from response. OCSP_resp_find_status(): finds and extracts status
     information from an OCSP_CERTID structure (which will be created
     when the request structure is built). These are built from lower
     level functions which work on OCSP_SINGLERESP structures but
     wont normally be used unless the application wishes to examine
     extensions in the OCSP response for example.

     Replace nonce routines with a pair of functions.
     OCSP_request_add1_nonce() adds a nonce value and optionally
     generates a random value. OCSP_check_nonce() checks the
     validity of the nonce in an OCSP response.
     [Steve Henson]

  *) Change function OCSP_request_add() to OCSP_request_add0_id().
     This doesn't copy the supplied OCSP_CERTID and avoids the
     need to free up the newly created id. Change return type
     to OCSP_ONEREQ to return the internal OCSP_ONEREQ structure.
     This can then be used to add extensions to the request.
     Deleted OCSP_request_new(), since most of its functionality
     is now in OCSP_REQUEST_new() (and the case insensitive name
     clash) apart from the ability to set the request name which
     will be added elsewhere.
     [Steve Henson]

  *) Update OCSP API. Remove obsolete extensions argument from
     various functions. Extensions are now handled using the new
     OCSP extension code. New simple OCSP HTTP function which 
     can be used to send requests and parse the response.
     [Steve Henson]

  *) Fix the PKCS#7 (S/MIME) code to work with new ASN1. Two new
     ASN1_ITEM structures help with sign and verify. PKCS7_ATTR_SIGN
     uses the special reorder version of SET OF to sort the attributes
     and reorder them to match the encoded order. This resolves a long
     standing problem: a verify on a PKCS7 structure just after signing
     it used to fail because the attribute order did not match the
     encoded order. PKCS7_ATTR_VERIFY does not reorder the attributes:
     it uses the received order. This is necessary to tolerate some broken
     software that does not order SET OF. This is handled by encoding
     as a SEQUENCE OF but using implicit tagging (with UNIVERSAL class)
     to produce the required SET OF.
     [Steve Henson]

  *) Have mk1mf.pl generate the macros OPENSSL_BUILD_SHLIBCRYPTO and
     OPENSSL_BUILD_SHLIBSSL and use them appropriately in the header
     files to get correct declarations of the ASN.1 item variables.
     [Richard Levitte]

  *) Rewrite of PKCS#12 code to use new ASN1 functionality. Replace many
     PKCS#12 macros with real functions. Fix two unrelated ASN1 bugs:
     asn1_check_tlen() would sometimes attempt to use 'ctx' when it was
     NULL and ASN1_TYPE was not dereferenced properly in asn1_ex_c2i().
     New ASN1 macro: DECLARE_ASN1_ITEM() which just declares the relevant
     ASN1_ITEM and no wrapper functions.
     [Steve Henson]

  *) New functions or ASN1_item_d2i_fp() and ASN1_item_d2i_bio(). These
     replace the old function pointer based I/O routines. Change most of
     the *_d2i_bio() and *_d2i_fp() functions to use these.
     [Steve Henson]

  *) Enhance mkdef.pl to be more accepting about spacing in C preprocessor
     lines, recognice more "algorithms" that can be deselected, and make
     it complain about algorithm deselection that isn't recognised.
     [Richard Levitte]

  *) New ASN1 functions to handle dup, sign, verify, digest, pack and
     unpack operations in terms of ASN1_ITEM. Modify existing wrappers
     to use new functions. Add NO_ASN1_OLD which can be set to remove
     some old style ASN1 functions: this can be used to determine if old
     code will still work when these eventually go away.
     [Steve Henson]

  *) New extension functions for OCSP structures, these follow the
     same conventions as certificates and CRLs.
     [Steve Henson]

  *) New function X509V3_add1_i2d(). This automatically encodes and
     adds an extension. Its behaviour can be customised with various
     flags to append, replace or delete. Various wrappers added for
     certifcates and CRLs.
     [Steve Henson]

  *) Fix to avoid calling the underlying ASN1 print routine when
     an extension cannot be parsed. Correct a typo in the
     OCSP_SERVICELOC extension. Tidy up print OCSP format.
     [Steve Henson]

  *) Make mkdef.pl parse some of the ASN1 macros and add apropriate
     entries for variables.
     [Steve Henson]

  *) Add functionality to apps/openssl.c for detecting locking
     problems: As the program is single-threaded, all we have
     to do is register a locking callback using an array for
     storing which locks are currently held by the program.
     [Bodo Moeller]

  *) Use a lock around the call to CRYPTO_get_ex_new_index() in
     SSL_get_ex_data_X509_STORE_idx(), which is used in
     ssl_verify_cert_chain() and thus can be called at any time
     during TLS/SSL handshakes so that thread-safety is essential.
     Unfortunately, the ex_data design is not at all suited
     for multi-threaded use, so it probably should be abolished.
     [Bodo Moeller]

  *) Added Broadcom "ubsec" ENGINE to OpenSSL.
     [Broadcom, tweaked and integrated by Geoff Thorpe]

  *) Move common extension printing code to new function
     X509V3_print_extensions(). Reorganise OCSP print routines and
     implement some needed OCSP ASN1 functions. Add OCSP extensions.
     [Steve Henson]

  *) New function X509_signature_print() to remove duplication in some
     print routines.
     [Steve Henson]

  *) Add a special meaning when SET OF and SEQUENCE OF flags are both
     set (this was treated exactly the same as SET OF previously). This
     is used to reorder the STACK representing the structure to match the
     encoding. This will be used to get round a problem where a PKCS7
     structure which was signed could not be verified because the STACK
     order did not reflect the encoded order.
     [Steve Henson]

  *) Reimplement the OCSP ASN1 module using the new code.
     [Steve Henson]

  *) Update the X509V3 code to permit the use of an ASN1_ITEM structure
     for its ASN1 operations. The old style function pointers still exist
     for now but they will eventually go away.
     [Steve Henson]

  *) Merge in replacement ASN1 code from the ASN1 branch. This almost
     completely replaces the old ASN1 functionality with a table driven
     encoder and decoder which interprets an ASN1_ITEM structure describing
     the ASN1 module. Compatibility with the existing ASN1 API (i2d,d2i) is
     largely maintained. Almost all of the old asn1_mac.h macro based ASN1
     has also been converted to the new form.
     [Steve Henson]

  *) Change BN_mod_exp_recp so that negative moduli are tolerated
     (the sign is ignored).  Similarly, ignore the sign in BN_MONT_CTX_set
     so that BN_mod_exp_mont and BN_mod_exp_mont_word work
     for negative moduli.
     [Bodo Moeller]

  *) Fix BN_uadd and BN_usub: Always return non-negative results instead
     of not touching the result's sign bit.
     [Bodo Moeller]

  *) BN_div bugfix: If the result is 0, the sign (res->neg) must not be
     set.
     [Bodo Moeller]

  *) Changed the LHASH code to use prototypes for callbacks, and created
     macros to declare and implement thin (optionally static) functions
     that provide type-safety and avoid function pointer casting for the
     type-specific callbacks.
     [Geoff Thorpe]

  *) Added Kerberos Cipher Suites to be used with TLS, as written in
     RFC 2712.
     [Veers Staats <staatsvr@asc.hpc.mil>,
      Jeffrey Altman <jaltman@columbia.edu>, via Richard Levitte]

  *) Reformat the FAQ so the different questions and answers can be divided
     in sections depending on the subject.
     [Richard Levitte]

  *) Have the zlib compression code load ZLIB.DLL dynamically under
     Windows.
     [Richard Levitte]

  *) New function BN_mod_sqrt for computing square roots modulo a prime
     (using the probabilistic Tonelli-Shanks algorithm unless
     p == 3 (mod 4)  or  p == 5 (mod 8),  which are cases that can
     be handled deterministically).
     [Lenka Fibikova <fibikova@exp-math.uni-essen.de>, Bodo Moeller]

  *) Make BN_mod_inverse faster by explicitly handling small quotients
     in the Euclid loop. (Speed gain about 20% for small moduli [256 or
     512 bits], about 30% for larger ones [1024 or 2048 bits].)
     [Bodo Moeller]

  *) New function BN_kronecker.
     [Bodo Moeller]

  *) Fix BN_gcd so that it works on negative inputs; the result is
     positive unless both parameters are zero.
     Previously something reasonably close to an infinite loop was
     possible because numbers could be growing instead of shrinking
     in the implementation of Euclid's algorithm.
     [Bodo Moeller]

  *) Fix BN_is_word() and BN_is_one() macros to take into account the
     sign of the number in question.

     Fix BN_is_word(a,w) to work correctly for w == 0.

     The old BN_is_word(a,w) macro is now called BN_abs_is_word(a,w)
     because its test if the absolute value of 'a' equals 'w'.
     Note that BN_abs_is_word does *not* handle w == 0 reliably;
     it exists mostly for use in the implementations of BN_is_zero(),
     BN_is_one(), and BN_is_word().
     [Bodo Moeller]

  *) New function BN_swap.
     [Bodo Moeller]

  *) Use BN_nnmod instead of BN_mod in crypto/bn/bn_exp.c so that
     the exponentiation functions are more likely to produce reasonable
     results on negative inputs.
     [Bodo Moeller]

  *) Change BN_mod_mul so that the result is always non-negative.
     Previously, it could be negative if one of the factors was negative;
     I don't think anyone really wanted that behaviour.
     [Bodo Moeller]

  *) Move BN_mod_... functions into new file crypto/bn/bn_mod.c
     (except for exponentiation, which stays in crypto/bn/bn_exp.c,
     and BN_mod_mul_reciprocal, which stays in crypto/bn/bn_recp.c)
     and add new functions:

          BN_nnmod
          BN_mod_sqr
          BN_mod_add
          BN_mod_add_quick
          BN_mod_sub
          BN_mod_sub_quick
          BN_mod_lshift1
          BN_mod_lshift1_quick
          BN_mod_lshift
          BN_mod_lshift_quick

     These functions always generate non-negative results.

     BN_nnmod otherwise is like BN_mod (if BN_mod computes a remainder  r
     such that  |m| < r < 0,  BN_nnmod will output  rem + |m|  instead).

     BN_mod_XXX_quick(r, a, [b,] m) generates the same result as
     BN_mod_XXX(r, a, [b,] m, ctx), but requires that  a  [and  b]
     be reduced modulo  m.
     [Lenka Fibikova <fibikova@exp-math.uni-essen.de>, Bodo Moeller]

#if 0
     The following entry accidentily appeared in the CHANGES file
     distributed with OpenSSL 0.9.7.  The modifications described in
     it do *not* apply to OpenSSL 0.9.7.

  *) Remove a few calls to bn_wexpand() in BN_sqr() (the one in there
     was actually never needed) and in BN_mul().  The removal in BN_mul()
     required a small change in bn_mul_part_recursive() and the addition
     of the functions bn_cmp_part_words(), bn_sub_part_words() and
     bn_add_part_words(), which do the same thing as bn_cmp_words(),
     bn_sub_words() and bn_add_words() except they take arrays with
     differing sizes.
     [Richard Levitte]
#endif

  *) In 'openssl passwd', verify passwords read from the terminal
     unless the '-salt' option is used (which usually means that
     verification would just waste user's time since the resulting
     hash is going to be compared with some given password hash)
     or the new '-noverify' option is used.

     This is an incompatible change, but it does not affect
     non-interactive use of 'openssl passwd' (passwords on the command
     line, '-stdin' option, '-in ...' option) and thus should not
     cause any problems.
     [Bodo Moeller]

  *) Remove all references to RSAref, since there's no more need for it.
     [Richard Levitte]

  *) Make DSO load along a path given through an environment variable
     (SHLIB_PATH) with shl_load().
     [Richard Levitte]

  *) Constify the ENGINE code as a result of BIGNUM constification.
     Also constify the RSA code and most things related to it.  In a
     few places, most notable in the depth of the ASN.1 code, ugly
     casts back to non-const were required (to be solved at a later
     time)
     [Richard Levitte]

  *) Make it so the openssl application has all engines loaded by default.
     [Richard Levitte]

  *) Constify the BIGNUM routines a little more.
     [Richard Levitte]

  *) Add the following functions:

	ENGINE_load_cswift()
	ENGINE_load_chil()
	ENGINE_load_atalla()
	ENGINE_load_nuron()
	ENGINE_load_builtin_engines()

     That way, an application can itself choose if external engines that
     are built-in in OpenSSL shall ever be used or not.  The benefit is
     that applications won't have to be linked with libdl or other dso
     libraries unless it's really needed.

     Changed 'openssl engine' to load all engines on demand.
     Changed the engine header files to avoid the duplication of some
     declarations (they differed!).
     [Richard Levitte]

  *) 'openssl engine' can now list capabilities.
     [Richard Levitte]

  *) Better error reporting in 'openssl engine'.
     [Richard Levitte]

  *) Never call load_dh_param(NULL) in s_server.
     [Bodo Moeller]

  *) Add engine application.  It can currently list engines by name and
     identity, and test if they are actually available.
     [Richard Levitte]

  *) Improve RPM specification file by forcing symbolic linking and making
     sure the installed documentation is also owned by root.root.
     [Damien Miller <djm@mindrot.org>]

  *) Give the OpenSSL applications more possibilities to make use of
     keys (public as well as private) handled by engines.
     [Richard Levitte]

  *) Add OCSP code that comes from CertCo.
     [Richard Levitte]

  *) Add VMS support for the Rijndael code.
     [Richard Levitte]

  *) Added untested support for Nuron crypto accelerator.
     [Ben Laurie]

  *) Add support for external cryptographic devices.  This code was
     previously distributed separately as the "engine" branch.
     [Geoff Thorpe, Richard Levitte]

  *) Rework the filename-translation in the DSO code. It is now possible to
     have far greater control over how a "name" is turned into a filename
     depending on the operating environment and any oddities about the
     different shared library filenames on each system.
     [Geoff Thorpe]

  *) Support threads on FreeBSD-elf in Configure.
     [Richard Levitte]

  *) Fix for SHA1 assembly problem with MASM: it produces
     warnings about corrupt line number information when assembling
     with debugging information. This is caused by the overlapping
     of two sections.
     [Bernd Matthes <mainbug@celocom.de>, Steve Henson]

  *) NCONF changes.
     NCONF_get_number() has no error checking at all.  As a replacement,
     NCONF_get_number_e() is defined (_e for "error checking") and is
     promoted strongly.  The old NCONF_get_number is kept around for
     binary backward compatibility.
     Make it possible for methods to load from something other than a BIO,
     by providing a function pointer that is given a name instead of a BIO.
     For example, this could be used to load configuration data from an
     LDAP server.
     [Richard Levitte]

  *) Fix for non blocking accept BIOs. Added new I/O special reason
     BIO_RR_ACCEPT to cover this case. Previously use of accept BIOs
     with non blocking I/O was not possible because no retry code was
     implemented. Also added new SSL code SSL_WANT_ACCEPT to cover
     this case.
     [Steve Henson]

  *) Added the beginnings of Rijndael support.
     [Ben Laurie]

  *) Fix for bug in DirectoryString mask setting. Add support for
     X509_NAME_print_ex() in 'req' and X509_print_ex() function
     to allow certificate printing to more controllable, additional
     'certopt' option to 'x509' to allow new printing options to be
     set.
     [Steve Henson]

  *) Clean old EAY MD5 hack from e_os.h.
     [Richard Levitte]

 Changes between 0.9.6l and 0.9.6m  [17 Mar 2004]

  *) Fix null-pointer assignment in do_change_cipher_spec() revealed
     by using the Codenomicon TLS Test Tool (CVE-2004-0079)
     [Joe Orton, Steve Henson]

 Changes between 0.9.6k and 0.9.6l  [04 Nov 2003]

  *) Fix additional bug revealed by the NISCC test suite:

     Stop bug triggering large recursion when presented with
     certain ASN.1 tags (CVE-2003-0851)
     [Steve Henson]

 Changes between 0.9.6j and 0.9.6k  [30 Sep 2003]

  *) Fix various bugs revealed by running the NISCC test suite:

     Stop out of bounds reads in the ASN1 code when presented with
     invalid tags (CVE-2003-0543 and CVE-2003-0544).
     
     If verify callback ignores invalid public key errors don't try to check
     certificate signature with the NULL public key.

     [Steve Henson]

  *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate
     if the server requested one: as stated in TLS 1.0 and SSL 3.0
     specifications.
     [Steve Henson]

  *) In ssl3_get_client_hello() (ssl/s3_srvr.c), tolerate additional
     extra data after the compression methods not only for TLS 1.0
     but also for SSL 3.0 (as required by the specification).
     [Bodo Moeller; problem pointed out by Matthias Loepfe]

  *) Change X509_certificate_type() to mark the key as exported/exportable
     when it's 512 *bits* long, not 512 bytes.
     [Richard Levitte]

 Changes between 0.9.6i and 0.9.6j  [10 Apr 2003]

  *) Countermeasure against the Klima-Pokorny-Rosa extension of
     Bleichbacher's attack on PKCS #1 v1.5 padding: treat
     a protocol version number mismatch like a decryption error
     in ssl3_get_client_key_exchange (ssl/s3_srvr.c).
     [Bodo Moeller]

  *) Turn on RSA blinding by default in the default implementation
     to avoid a timing attack. Applications that don't want it can call
     RSA_blinding_off() or use the new flag RSA_FLAG_NO_BLINDING.
     They would be ill-advised to do so in most cases.
     [Ben Laurie, Steve Henson, Geoff Thorpe, Bodo Moeller]

  *) Change RSA blinding code so that it works when the PRNG is not
     seeded (in this case, the secret RSA exponent is abused as
     an unpredictable seed -- if it is not unpredictable, there
     is no point in blinding anyway).  Make RSA blinding thread-safe
     by remembering the creator's thread ID in rsa->blinding and
     having all other threads use local one-time blinding factors
     (this requires more computation than sharing rsa->blinding, but
     avoids excessive locking; and if an RSA object is not shared
     between threads, blinding will still be very fast).
     [Bodo Moeller]

 Changes between 0.9.6h and 0.9.6i  [19 Feb 2003]

  *) In ssl3_get_record (ssl/s3_pkt.c), minimize information leaked
     via timing by performing a MAC computation even if incorrrect
     block cipher padding has been found.  This is a countermeasure
     against active attacks where the attacker has to distinguish
     between bad padding and a MAC verification error. (CVE-2003-0078)

     [Bodo Moeller; problem pointed out by Brice Canvel (EPFL),
     Alain Hiltgen (UBS), Serge Vaudenay (EPFL), and
     Martin Vuagnoux (EPFL, Ilion)]

 Changes between 0.9.6g and 0.9.6h  [5 Dec 2002]

  *) New function OPENSSL_cleanse(), which is used to cleanse a section of
     memory from it's contents.  This is done with a counter that will
     place alternating values in each byte.  This can be used to solve
     two issues: 1) the removal of calls to memset() by highly optimizing
     compilers, and 2) cleansing with other values than 0, since those can
     be read through on certain media, for example a swap space on disk.
     [Geoff Thorpe]

  *) Bugfix: client side session caching did not work with external caching,
     because the session->cipher setting was not restored when reloading
     from the external cache. This problem was masked, when
     SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG (part of SSL_OP_ALL) was set.
     (Found by Steve Haslam <steve@araqnid.ddts.net>.)
     [Lutz Jaenicke]

  *) Fix client_certificate (ssl/s2_clnt.c): The permissible total