+ *) Clean old EAY MD5 hack from e_os.h.
+ [Richard Levitte]
+
+ 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
+ length of the REQUEST-CERTIFICATE message is 18 .. 34, not 17 .. 33.
+ [Zeev Lieber <zeev-l@yahoo.com>]
+
+ *) Undo an undocumented change introduced in 0.9.6e which caused
+ repeated calls to OpenSSL_add_all_ciphers() and
+ OpenSSL_add_all_digests() to be ignored, even after calling
+ EVP_cleanup().
+ [Richard Levitte]
+
+ *) Change the default configuration reader to deal with last line not
+ being properly terminated.
+ [Richard Levitte]
+
+ *) Change X509_NAME_cmp() so it applies the special rules on handling
+ DN values that are of type PrintableString, as well as RDNs of type
+ emailAddress where the value has the type ia5String.
+ [stefank@valicert.com via Richard Levitte]
+
+ *) Add a SSL_SESS_CACHE_NO_INTERNAL_STORE flag to take over half
+ the job SSL_SESS_CACHE_NO_INTERNAL_LOOKUP was inconsistently
+ doing, define a new flag (SSL_SESS_CACHE_NO_INTERNAL) to be
+ the bitwise-OR of the two for use by the majority of applications
+ wanting this behaviour, and update the docs. The documented
+ behaviour and actual behaviour were inconsistent and had been
+ changing anyway, so this is more a bug-fix than a behavioural
+ change.
+ [Geoff Thorpe, diagnosed by Nadav Har'El]
+
+ *) Don't impose a 16-byte length minimum on session IDs in ssl/s3_clnt.c
+ (the SSL 3.0 and TLS 1.0 specifications allow any length up to 32 bytes).
+ [Bodo Moeller]
+
+ *) Fix initialization code race conditions in
+ SSLv23_method(), SSLv23_client_method(), SSLv23_server_method(),
+ SSLv2_method(), SSLv2_client_method(), SSLv2_server_method(),
+ SSLv3_method(), SSLv3_client_method(), SSLv3_server_method(),
+ TLSv1_method(), TLSv1_client_method(), TLSv1_server_method(),
+ ssl2_get_cipher_by_char(),
+ ssl3_get_cipher_by_char().
+ [Patrick McCormick <patrick@tellme.com>, Bodo Moeller]
+
+ *) Reorder cleanup sequence in SSL_CTX_free(): only remove the ex_data after
+ the cached sessions are flushed, as the remove_cb() might use ex_data
+ contents. Bug found by Sam Varshavchik <mrsam@courier-mta.com>
+ (see [openssl.org #212]).
+ [Geoff Thorpe, Lutz Jaenicke]
+
+ *) Fix typo in OBJ_txt2obj which incorrectly passed the content
+ length, instead of the encoding length to d2i_ASN1_OBJECT.
+ [Steve Henson]
+
+ Changes between 0.9.6f and 0.9.6g [9 Aug 2002]
+
+ *) [In 0.9.6g-engine release:]
+ Fix crypto/engine/vendor_defns/cswift.h for WIN32 (use '_stdcall').
+ [Lynn Gazis <lgazis@rainbow.com>]
+
+ Changes between 0.9.6e and 0.9.6f [8 Aug 2002]
+
+ *) Fix ASN1 checks. Check for overflow by comparing with LONG_MAX
+ and get fix the header length calculation.
+ [Florian Weimer <Weimer@CERT.Uni-Stuttgart.DE>,
+ Alon Kantor <alonk@checkpoint.com> (and others),
+ Steve Henson]
+
+ *) Use proper error handling instead of 'assertions' in buffer
+ overflow checks added in 0.9.6e. This prevents DoS (the
+ assertions could call abort()).
+ [Arne Ansper <arne@ats.cyber.ee>, Bodo Moeller]
+
+ Changes between 0.9.6d and 0.9.6e [30 Jul 2002]
+
+ *) Add various sanity checks to asn1_get_length() to reject
+ the ASN1 length bytes if they exceed sizeof(long), will appear
+ negative or the content length exceeds the length of the
+ supplied buffer.
+ [Steve Henson, Adi Stav <stav@mercury.co.il>, James Yonan <jim@ntlp.com>]
+
+ *) Fix cipher selection routines: ciphers without encryption had no flags
+ for the cipher strength set and where therefore not handled correctly
+ by the selection routines (PR #130).
+ [Lutz Jaenicke]
+
+ *) Fix EVP_dsa_sha macro.
+ [Nils Larsch]
+
+ *) New option
+ SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS
+ for disabling the SSL 3.0/TLS 1.0 CBC vulnerability countermeasure
+ that was added in OpenSSL 0.9.6d.
+
+ As the countermeasure turned out to be incompatible with some
+ broken SSL implementations, the new option is part of SSL_OP_ALL.
+ SSL_OP_ALL is usually employed when compatibility with weird SSL
+ implementations is desired (e.g. '-bugs' option to 's_client' and
+ 's_server'), so the new option is automatically set in many
+ applications.
+ [Bodo Moeller]
+
+ *) Changes in security patch:
+
+ Changes marked "(CHATS)" were sponsored by the Defense Advanced
+ Research Projects Agency (DARPA) and Air Force Research Laboratory,
+ Air Force Materiel Command, USAF, under agreement number
+ F30602-01-2-0537.
+
+ *) Add various sanity checks to asn1_get_length() to reject
+ the ASN1 length bytes if they exceed sizeof(long), will appear
+ negative or the content length exceeds the length of the
+ supplied buffer. (CAN-2002-0659)
+ [Steve Henson, Adi Stav <stav@mercury.co.il>, James Yonan <jim@ntlp.com>]
+
+ *) Assertions for various potential buffer overflows, not known to
+ happen in practice.
+ [Ben Laurie (CHATS)]
+
+ *) Various temporary buffers to hold ASCII versions of integers were
+ too small for 64 bit platforms. (CAN-2002-0655)
+ [Matthew Byng-Maddick <mbm@aldigital.co.uk> and Ben Laurie (CHATS)>
+
+ *) Remote buffer overflow in SSL3 protocol - an attacker could
+ supply an oversized session ID to a client. (CAN-2002-0656)
+ [Ben Laurie (CHATS)]
+
+ *) Remote buffer overflow in SSL2 protocol - an attacker could
+ supply an oversized client master key. (CAN-2002-0656)
+ [Ben Laurie (CHATS)]
+
+ Changes between 0.9.6c and 0.9.6d [9 May 2002]
+
+ *) Fix crypto/asn1/a_sign.c so that 'parameters' is omitted (not
+ encoded as NULL) with id-dsa-with-sha1.
+ [Nils Larsch <nla@trustcenter.de>; problem pointed out by Bodo Moeller]
+
+ *) Check various X509_...() return values in apps/req.c.
+ [Nils Larsch <nla@trustcenter.de>]
+
+ *) Fix BASE64 decode (EVP_DecodeUpdate) for data with CR/LF ended lines:
+ an end-of-file condition would erronously be flagged, when the CRLF
+ was just at the end of a processed block. The bug was discovered when
+ processing data through a buffering memory BIO handing the data to a
+ BASE64-decoding BIO. Bug fund and patch submitted by Pavel Tsekov
+ <ptsekov@syntrex.com> and Nedelcho Stanev.
+ [Lutz Jaenicke]
+
+ *) Implement a countermeasure against a vulnerability recently found
+ in CBC ciphersuites in SSL 3.0/TLS 1.0: Send an empty fragment
+ before application data chunks to avoid the use of known IVs
+ with data potentially chosen by the attacker.
+ [Bodo Moeller]
+
+ *) Fix length checks in ssl3_get_client_hello().
+ [Bodo Moeller]
+
+ *) TLS/SSL library bugfix: use s->s3->in_read_app_data differently
+ to prevent ssl3_read_internal() from incorrectly assuming that
+ ssl3_read_bytes() found application data while handshake
+ processing was enabled when in fact s->s3->in_read_app_data was
+ merely automatically cleared during the initial handshake.
+ [Bodo Moeller; problem pointed out by Arne Ansper <arne@ats.cyber.ee>]
+
+ *) Fix object definitions for Private and Enterprise: they were not
+ recognized in their shortname (=lowercase) representation. Extend
+ obj_dat.pl to issue an error when using undefined keywords instead
+ of silently ignoring the problem (Svenning Sorensen
+ <sss@sss.dnsalias.net>).
+ [Lutz Jaenicke]
+
+ *) Fix DH_generate_parameters() so that it works for 'non-standard'
+ generators, i.e. generators other than 2 and 5. (Previously, the
+ code did not properly initialise the 'add' and 'rem' values to
+ BN_generate_prime().)
+
+ In the new general case, we do not insist that 'generator' is
+ actually a primitive root: This requirement is rather pointless;
+ a generator of the order-q subgroup is just as good, if not
+ better.
+ [Bodo Moeller]
+
+ *) Map new X509 verification errors to alerts. Discovered and submitted by
+ Tom Wu <tom@arcot.com>.
+ [Lutz Jaenicke]
+
+ *) Fix ssl3_pending() (ssl/s3_lib.c) to prevent SSL_pending() from
+ returning non-zero before the data has been completely received
+ when using non-blocking I/O.
+ [Bodo Moeller; problem pointed out by John Hughes]
+
+ *) Some of the ciphers missed the strength entry (SSL_LOW etc).
+ [Ben Laurie, Lutz Jaenicke]
+
+ *) Fix bug in SSL_clear(): bad sessions were not removed (found by
+ Yoram Zahavi <YoramZ@gilian.com>).
+ [Lutz Jaenicke]
+
+ *) Add information about CygWin 1.3 and on, and preserve proper
+ configuration for the versions before that.
+ [Corinna Vinschen <vinschen@redhat.com> and Richard Levitte]
+
+ *) Make removal from session cache (SSL_CTX_remove_session()) more robust:
+ check whether we deal with a copy of a session and do not delete from
+ the cache in this case. Problem reported by "Izhar Shoshani Levi"
+ <izhar@checkpoint.com>.
+ [Lutz Jaenicke]
+
+ *) Do not store session data into the internal session cache, if it
+ is never intended to be looked up (SSL_SESS_CACHE_NO_INTERNAL_LOOKUP
+ flag is set). Proposed by Aslam <aslam@funk.com>.
+ [Lutz Jaenicke]
+
+ *) Have ASN1_BIT_STRING_set_bit() really clear a bit when the requested
+ value is 0.
+ [Richard Levitte]
+
+ *) [In 0.9.6d-engine release:]
+ Fix a crashbug and a logic bug in hwcrhk_load_pubkey().
+ [Toomas Kiisk <vix@cyber.ee> via Richard Levitte]
+
+ *) Add the configuration target linux-s390x.
+ [Neale Ferguson <Neale.Ferguson@SoftwareAG-USA.com> via Richard Levitte]
+
+ *) The earlier bugfix for the SSL3_ST_SW_HELLO_REQ_C case of
+ ssl3_accept (ssl/s3_srvr.c) incorrectly used a local flag
+ variable as an indication that a ClientHello message has been
+ received. As the flag value will be lost between multiple
+ invocations of ssl3_accept when using non-blocking I/O, the
+ function may not be aware that a handshake has actually taken
+ place, thus preventing a new session from being added to the
+ session cache.
+
+ To avoid this problem, we now set s->new_session to 2 instead of
+ using a local variable.
+ [Lutz Jaenicke, Bodo Moeller]
+
+ *) Bugfix: Return -1 from ssl3_get_server_done (ssl3/s3_clnt.c)
+ if the SSL_R_LENGTH_MISMATCH error is detected.
+ [Geoff Thorpe, Bodo Moeller]
+
+ *) New 'shared_ldflag' column in Configure platform table.
+ [Richard Levitte]
+
+ *) Fix EVP_CIPHER_mode macro.
+ ["Dan S. Camper" <dan@bti.net>]
+
+ *) Fix ssl3_read_bytes (ssl/s3_pkt.c): To ignore messages of unknown
+ type, we must throw them away by setting rr->length to 0.
+ [D P Chang <dpc@qualys.com>]
+
+ Changes between 0.9.6b and 0.9.6c [21 dec 2001]
+
+ *) Fix BN_rand_range bug pointed out by Dominikus Scherkl
+ <Dominikus.Scherkl@biodata.com>. (The previous implementation
+ worked incorrectly for those cases where range = 10..._2 and
+ 3*range is two bits longer than range.)
+ [Bodo Moeller]
+
+ *) Only add signing time to PKCS7 structures if it is not already
+ present.
+ [Steve Henson]
+
+ *) Fix crypto/objects/objects.h: "ld-ce" should be "id-ce",
+ OBJ_ld_ce should be OBJ_id_ce.
+ Also some ip-pda OIDs in crypto/objects/objects.txt were
+ incorrect (cf. RFC 3039).
+ [Matt Cooper, Frederic Giudicelli, Bodo Moeller]
+
+ *) Release CRYPTO_LOCK_DYNLOCK when CRYPTO_destroy_dynlockid()
+ returns early because it has nothing to do.
+ [Andy Schneider <andy.schneider@bjss.co.uk>]
+
+ *) [In 0.9.6c-engine release:]
+ Fix mutex callback return values in crypto/engine/hw_ncipher.c.
+ [Andy Schneider <andy.schneider@bjss.co.uk>]
+
+ *) [In 0.9.6c-engine release:]
+ Add support for Cryptographic Appliance's keyserver technology.
+ (Use engine 'keyclient')
+ [Cryptographic Appliances and Geoff Thorpe]
+
+ *) Add a configuration entry for OS/390 Unix. The C compiler 'c89'
+ is called via tools/c89.sh because arguments have to be
+ rearranged (all '-L' options must appear before the first object
+ modules).
+ [Richard Shapiro <rshapiro@abinitio.com>]
+
+ *) [In 0.9.6c-engine release:]
+ Add support for Broadcom crypto accelerator cards, backported
+ from 0.9.7.
+ [Broadcom, Nalin Dahyabhai <nalin@redhat.com>, Mark Cox]
+
+ *) [In 0.9.6c-engine release:]
+ Add support for SureWare crypto accelerator cards from
+ Baltimore Technologies. (Use engine 'sureware')
+ [Baltimore Technologies and Mark Cox]
+
+ *) [In 0.9.6c-engine release:]
+ Add support for crypto accelerator cards from Accelerated
+ Encryption Processing, www.aep.ie. (Use engine 'aep')
+ [AEP Inc. and Mark Cox]
+
+ *) Add a configuration entry for gcc on UnixWare.
+ [Gary Benson <gbenson@redhat.com>]
+
+ *) Change ssl/s2_clnt.c and ssl/s2_srvr.c so that received handshake
+ messages are stored in a single piece (fixed-length part and
+ variable-length part combined) and fix various bugs found on the way.
+ [Bodo Moeller]
+
+ *) Disable caching in BIO_gethostbyname(), directly use gethostbyname()
+ instead. BIO_gethostbyname() does not know what timeouts are
+ appropriate, so entries would stay in cache even when they have
+ become invalid.
+ [Bodo Moeller; problem pointed out by Rich Salz <rsalz@zolera.com>
+
+ *) Change ssl23_get_client_hello (ssl/s23_srvr.c) behaviour when
+ faced with a pathologically small ClientHello fragment that does
+ not contain client_version: Instead of aborting with an error,
+ simply choose the highest available protocol version (i.e.,
+ TLS 1.0 unless it is disabled). In practice, ClientHello
+ messages are never sent like this, but this change gives us
+ strictly correct behaviour at least for TLS.
+ [Bodo Moeller]
+
+ *) Fix SSL handshake functions and SSL_clear() such that SSL_clear()
+ never resets s->method to s->ctx->method when called from within
+ one of the SSL handshake functions.
+ [Bodo Moeller; problem pointed out by Niko Baric]
+
+ *) In ssl3_get_client_hello (ssl/s3_srvr.c), generate a fatal alert
+ (sent using the client's version number) if client_version is
+ smaller than the protocol version in use. Also change
+ ssl23_get_client_hello (ssl/s23_srvr.c) to select TLS 1.0 if
+ the client demanded SSL 3.0 but only TLS 1.0 is enabled; then
+ the client will at least see that alert.
+ [Bodo Moeller]
+
+ *) Fix ssl3_get_message (ssl/s3_both.c) to handle message fragmentation
+ correctly.
+ [Bodo Moeller]
+
+ *) Avoid infinite loop in ssl3_get_message (ssl/s3_both.c) if a
+ client receives HelloRequest while in a handshake.
+ [Bodo Moeller; bug noticed by Andy Schneider <andy.schneider@bjss.co.uk>]
+
+ *) Bugfix in ssl3_accept (ssl/s3_srvr.c): Case SSL3_ST_SW_HELLO_REQ_C
+ should end in 'break', not 'goto end' which circuments various
+ cleanups done in state SSL_ST_OK. But session related stuff
+ must be disabled for SSL_ST_OK in the case that we just sent a
+ HelloRequest.
+
+ Also avoid some overhead by not calling ssl_init_wbio_buffer()
+ before just sending a HelloRequest.
+ [Bodo Moeller, Eric Rescorla <ekr@rtfm.com>]
+
+ *) Fix ssl/s3_enc.c, ssl/t1_enc.c and ssl/s3_pkt.c so that we don't
+ reveal whether illegal block cipher padding was found or a MAC
+ verification error occured. (Neither SSLerr() codes nor alerts
+ are directly visible to potential attackers, but the information
+ may leak via logfiles.)
+
+ Similar changes are not required for the SSL 2.0 implementation
+ because the number of padding bytes is sent in clear for SSL 2.0,
+ and the extra bytes are just ignored. However ssl/s2_pkt.c
+ failed to verify that the purported number of padding bytes is in
+ the legal range.
+ [Bodo Moeller]
+
+ *) Add OpenUNIX-8 support including shared libraries
+ (Boyd Lynn Gerber <gerberb@zenez.com>).
+ [Lutz Jaenicke]
+
+ *) Improve RSA_padding_check_PKCS1_OAEP() check again to avoid
+ 'wristwatch attack' using huge encoding parameters (cf.
+ James H. Manger's CRYPTO 2001 paper). Note that the
+ RSA_PKCS1_OAEP_PADDING case of RSA_private_decrypt() does not use
+ encoding parameters and hence was not vulnerable.
+ [Bodo Moeller]
+
+ *) BN_sqr() bug fix.
+ [Ulf Möller, reported by Jim Ellis <jim.ellis@cavium.com>]
+
+ *) Rabin-Miller test analyses assume uniformly distributed witnesses,
+ so use BN_pseudo_rand_range() instead of using BN_pseudo_rand()
+ followed by modular reduction.
+ [Bodo Moeller; pointed out by Adam Young <AYoung1@NCSUS.JNJ.COM>]
+
+ *) Add BN_pseudo_rand_range() with obvious functionality: BN_rand_range()
+ equivalent based on BN_pseudo_rand() instead of BN_rand().
+ [Bodo Moeller]
+
+ *) s3_srvr.c: allow sending of large client certificate lists (> 16 kB).
+ This function was broken, as the check for a new client hello message
+ to handle SGC did not allow these large messages.
+ (Tracked down by "Douglas E. Engert" <deengert@anl.gov>.)
+ [Lutz Jaenicke]
+
+ *) Add alert descriptions for TLSv1 to SSL_alert_desc_string[_long]().
+ [Lutz Jaenicke]
+
+ *) Fix buggy behaviour of BIO_get_num_renegotiates() and BIO_ctrl()
+ for BIO_C_GET_WRITE_BUF_SIZE ("Stephen Hinton" <shinton@netopia.com>).
+ [Lutz Jaenicke]
+
+ *) Rework the configuration and shared library support for Tru64 Unix.
+ The configuration part makes use of modern compiler features and
+ still retains old compiler behavior for those that run older versions
+ of the OS. The shared library support part includes a variant that
+ uses the RPATH feature, and is available through the special
+ configuration target "alpha-cc-rpath", which will never be selected
+ automatically.
+ [Tim Mooney <mooney@dogbert.cc.ndsu.NoDak.edu> via Richard Levitte]
+
+ *) In ssl3_get_key_exchange (ssl/s3_clnt.c), call ssl3_get_message()
+ with the same message size as in ssl3_get_certificate_request().
+ Otherwise, if no ServerKeyExchange message occurs, CertificateRequest
+ messages might inadvertently be reject as too long.
+ [Petr Lampa <lampa@fee.vutbr.cz>]
+
+ *) Enhanced support for IA-64 Unix platforms (well, Linux and HP-UX).
+ [Andy Polyakov]
+
+ *) Modified SSL library such that the verify_callback that has been set
+ specificly for an SSL object with SSL_set_verify() is actually being
+ used. Before the change, a verify_callback set with this function was
+ ignored and the verify_callback() set in the SSL_CTX at the time of
+ the call was used. New function X509_STORE_CTX_set_verify_cb() introduced
+ to allow the necessary settings.
+ [Lutz Jaenicke]
+
+ *) Initialize static variable in crypto/dsa/dsa_lib.c and crypto/dh/dh_lib.c
+ explicitly to NULL, as at least on Solaris 8 this seems not always to be
+ done automatically (in contradiction to the requirements of the C
+ standard). This made problems when used from OpenSSH.
+ [Lutz Jaenicke]
+
+ *) In OpenSSL 0.9.6a and 0.9.6b, crypto/dh/dh_key.c ignored
+ dh->length and always used
+
+ BN_rand_range(priv_key, dh->p).
+
+ BN_rand_range() is not necessary for Diffie-Hellman, and this
+ specific range makes Diffie-Hellman unnecessarily inefficient if
+ dh->length (recommended exponent length) is much smaller than the
+ length of dh->p. We could use BN_rand_range() if the order of
+ the subgroup was stored in the DH structure, but we only have
+ dh->length.
+
+ So switch back to
+
+ BN_rand(priv_key, l, ...)
+
+ where 'l' is dh->length if this is defined, or BN_num_bits(dh->p)-1
+ otherwise.
+ [Bodo Moeller]
+
+ *) In
+
+ RSA_eay_public_encrypt
+ RSA_eay_private_decrypt
+ RSA_eay_private_encrypt (signing)
+ RSA_eay_public_decrypt (signature verification)
+
+ (default implementations for RSA_public_encrypt,
+ RSA_private_decrypt, RSA_private_encrypt, RSA_public_decrypt),
+ always reject numbers >= n.
+ [Bodo Moeller]
+
+ *) In crypto/rand/md_rand.c, use a new short-time lock CRYPTO_LOCK_RAND2
+ to synchronize access to 'locking_thread'. This is necessary on
+ systems where access to 'locking_thread' (an 'unsigned long'
+ variable) is not atomic.
+ [Bodo Moeller]
+
+ *) In crypto/rand/md_rand.c, set 'locking_thread' to current thread's ID
+ *before* setting the 'crypto_lock_rand' flag. The previous code had
+ a race condition if 0 is a valid thread ID.
+ [Travis Vitek <vitek@roguewave.com>]
+
+ *) Add support for shared libraries under Irix.
+ [Albert Chin-A-Young <china@thewrittenword.com>]
+
+ *) Add configuration option to build on Linux on both big-endian and
+ little-endian MIPS.
+ [Ralf Baechle <ralf@uni-koblenz.de>]
+
+ *) Add the possibility to create shared libraries on HP-UX.
+ [Richard Levitte]
+
+ Changes between 0.9.6a and 0.9.6b [9 Jul 2001]
+
+ *) Change ssleay_rand_bytes (crypto/rand/md_rand.c)
+ to avoid a SSLeay/OpenSSL PRNG weakness pointed out by
+ Markku-Juhani O. Saarinen <markku-juhani.saarinen@nokia.com>:
+ PRNG state recovery was possible based on the output of
+ one PRNG request appropriately sized to gain knowledge on
+ 'md' followed by enough consecutive 1-byte PRNG requests
+ to traverse all of 'state'.
+
+ 1. When updating 'md_local' (the current thread's copy of 'md')
+ during PRNG output generation, hash all of the previous
+ 'md_local' value, not just the half used for PRNG output.
+
+ 2. Make the number of bytes from 'state' included into the hash
+ independent from the number of PRNG bytes requested.
+
+ The first measure alone would be sufficient to avoid
+ Markku-Juhani's attack. (Actually it had never occurred
+ to me that the half of 'md_local' used for chaining was the
+ half from which PRNG output bytes were taken -- I had always
+ assumed that the secret half would be used.) The second
+ measure makes sure that additional data from 'state' is never
+ mixed into 'md_local' in small portions; this heuristically
+ further strengthens the PRNG.
+ [Bodo Moeller]
+
+ *) Fix crypto/bn/asm/mips3.s.
+ [Andy Polyakov]
+
+ *) When only the key is given to "enc", the IV is undefined. Print out
+ an error message in this case.
+ [Lutz Jaenicke]
+
+ *) Handle special case when X509_NAME is empty in X509 printing routines.
+ [Steve Henson]
+
+ *) In dsa_do_verify (crypto/dsa/dsa_ossl.c), verify that r and s are
+ positive and less than q.
+ [Bodo Moeller]
+
+ *) Don't change *pointer in CRYPTO_add_lock() is add_lock_callback is
+ used: it isn't thread safe and the add_lock_callback should handle
+ that itself.
+ [Paul Rose <Paul.Rose@bridge.com>]
+
+ *) Verify that incoming data obeys the block size in
+ ssl3_enc (ssl/s3_enc.c) and tls1_enc (ssl/t1_enc.c).
+ [Bodo Moeller]
+
+ *) Fix OAEP check.
+ [Ulf Möller, Bodo Möller]
+
+ *) The countermeasure against Bleichbacher's attack on PKCS #1 v1.5
+ RSA encryption was accidentally removed in s3_srvr.c in OpenSSL 0.9.5
+ when fixing the server behaviour for backwards-compatible 'client
+ hello' messages. (Note that the attack is impractical against
+ SSL 3.0 and TLS 1.0 anyway because length and version checking
+ means that the probability of guessing a valid ciphertext is
+ around 2^-40; see section 5 in Bleichenbacher's CRYPTO '98
+ paper.)
+
+ Before 0.9.5, the countermeasure (hide the error by generating a
+ random 'decryption result') did not work properly because
+ ERR_clear_error() was missing, meaning that SSL_get_error() would
+ detect the supposedly ignored error.
+
+ Both problems are now fixed.
+ [Bodo Moeller]
+
+ *) In crypto/bio/bf_buff.c, increase DEFAULT_BUFFER_SIZE to 4096
+ (previously it was 1024).
+ [Bodo Moeller]
+
+ *) Fix for compatibility mode trust settings: ignore trust settings
+ unless some valid trust or reject settings are present.
+ [Steve Henson]
+
+ *) Fix for blowfish EVP: its a variable length cipher.
+ [Steve Henson]
+
+ *) Fix various bugs related to DSA S/MIME verification. Handle missing
+ parameters in DSA public key structures and return an error in the
+ DSA routines if parameters are absent.
+ [Steve Henson]
+
+ *) In versions up to 0.9.6, RAND_file_name() resorted to file ".rnd"
+ in the current directory if neither $RANDFILE nor $HOME was set.
+ RAND_file_name() in 0.9.6a returned NULL in this case. This has
+ caused some confusion to Windows users who haven't defined $HOME.
+ Thus RAND_file_name() is changed again: e_os.h can define a
+ DEFAULT_HOME, which will be used if $HOME is not set.
+ For Windows, we use "C:"; on other platforms, we still require
+ environment variables.
+
+ *) Move 'if (!initialized) RAND_poll()' into regions protected by
+ CRYPTO_LOCK_RAND. This is not strictly necessary, but avoids
+ having multiple threads call RAND_poll() concurrently.
+ [Bodo Moeller]
+
+ *) In crypto/rand/md_rand.c, replace 'add_do_not_lock' flag by a
+ combination of a flag and a thread ID variable.
+ Otherwise while one thread is in ssleay_rand_bytes (which sets the
+ flag), *other* threads can enter ssleay_add_bytes without obeying
+ the CRYPTO_LOCK_RAND lock (and may even illegally release the lock
+ that they do not hold after the first thread unsets add_do_not_lock).
+ [Bodo Moeller]
+
+ *) Change bctest again: '-x' expressions are not available in all
+ versions of 'test'.
+ [Bodo Moeller]
+
+ Changes between 0.9.6 and 0.9.6a [5 Apr 2001]
+
+ *) Fix a couple of memory leaks in PKCS7_dataDecode()
+ [Steve Henson, reported by Heyun Zheng <hzheng@atdsprint.com>]
+
+ *) Change Configure and Makefiles to provide EXE_EXT, which will contain
+ the default extension for executables, if any. Also, make the perl
+ scripts that use symlink() to test if it really exists and use "cp"
+ if it doesn't. All this made OpenSSL compilable and installable in
+ CygWin.
+ [Richard Levitte]
+
+ *) Fix for asn1_GetSequence() for indefinite length constructed data.
+ If SEQUENCE is length is indefinite just set c->slen to the total
+ amount of data available.
+ [Steve Henson, reported by shige@FreeBSD.org]
+ [This change does not apply to 0.9.7.]
+
+ *) Change bctest to avoid here-documents inside command substitution
+ (workaround for FreeBSD /bin/sh bug).
+ For compatibility with Ultrix, avoid shell functions (introduced
+ in the bctest version that searches along $PATH).
+ [Bodo Moeller]
+
+ *) Rename 'des_encrypt' to 'des_encrypt1'. This avoids the clashes
+ with des_encrypt() defined on some operating systems, like Solaris
+ and UnixWare.
+ [Richard Levitte]
+
+ *) Check the result of RSA-CRT (see D. Boneh, R. DeMillo, R. Lipton:
+ On the Importance of Eliminating Errors in Cryptographic
+ Computations, J. Cryptology 14 (2001) 2, 101-119,
+ http://theory.stanford.edu/~dabo/papers/faults.ps.gz).
+ [Ulf Moeller]
+
+ *) MIPS assembler BIGNUM division bug fix.
+ [Andy Polyakov]
+
+ *) Disabled incorrect Alpha assembler code.
+ [Richard Levitte]
+
+ *) Fix PKCS#7 decode routines so they correctly update the length
+ after reading an EOC for the EXPLICIT tag.
+ [Steve Henson]
+ [This change does not apply to 0.9.7.]
+
+ *) Fix bug in PKCS#12 key generation routines. This was triggered
+ if a 3DES key was generated with a 0 initial byte. Include
+ PKCS12_BROKEN_KEYGEN compilation option to retain the old
+ (but broken) behaviour.
+ [Steve Henson]
+
+ *) Enhance bctest to search for a working bc along $PATH and print
+ it when found.
+ [Tim Rice <tim@multitalents.net> via Richard Levitte]
+
+ *) Fix memory leaks in err.c: free err_data string if necessary;
+ don't write to the wrong index in ERR_set_error_data.
+ [Bodo Moeller]
+
+ *) Implement ssl23_peek (analogous to ssl23_read), which previously
+ did not exist.
+ [Bodo Moeller]
+
+ *) Replace rdtsc with _emit statements for VC++ version 5.
+ [Jeremy Cooper <jeremy@baymoo.org>]
+
+ *) Make it possible to reuse SSLv2 sessions.
+ [Richard Levitte]
+
+ *) In copy_email() check for >= 0 as a return value for
+ X509_NAME_get_index_by_NID() since 0 is a valid index.
+ [Steve Henson reported by Massimiliano Pala <madwolf@opensca.org>]
+
+ *) Avoid coredump with unsupported or invalid public keys by checking if
+ X509_get_pubkey() fails in PKCS7_verify(). Fix memory leak when
+ PKCS7_verify() fails with non detached data.
+ [Steve Henson]
+
+ *) Don't use getenv in library functions when run as setuid/setgid.
+ New function OPENSSL_issetugid().
+ [Ulf Moeller]
+
+ *) Avoid false positives in memory leak detection code (crypto/mem_dbg.c)
+ due to incorrect handling of multi-threading:
+
+ 1. Fix timing glitch in the MemCheck_off() portion of CRYPTO_mem_ctrl().
+
+ 2. Fix logical glitch in is_MemCheck_on() aka CRYPTO_is_mem_check_on().
+
+ 3. Count how many times MemCheck_off() has been called so that
+ nested use can be treated correctly. This also avoids
+ inband-signalling in the previous code (which relied on the
+ assumption that thread ID 0 is impossible).
+ [Bodo Moeller]
+
+ *) Add "-rand" option also to s_client and s_server.
+ [Lutz Jaenicke]
+
+ *) Fix CPU detection on Irix 6.x.
+ [Kurt Hockenbury <khockenb@stevens-tech.edu> and
+ "Bruce W. Forsberg" <bruce.forsberg@baesystems.com>]
+
+ *) Fix X509_NAME bug which produced incorrect encoding if X509_NAME
+ was empty.
+ [Steve Henson]
+ [This change does not apply to 0.9.7.]
+
+ *) Use the cached encoding of an X509_NAME structure rather than
+ copying it. This is apparently the reason for the libsafe "errors"
+ but the code is actually correct.
+ [Steve Henson]
+
+ *) Add new function BN_rand_range(), and fix DSA_sign_setup() to prevent
+ Bleichenbacher's DSA attack.
+ Extend BN_[pseudo_]rand: As before, top=1 forces the highest two bits
+ to be set and top=0 forces the highest bit to be set; top=-1 is new
+ and leaves the highest bit random.
+ [Ulf Moeller, Bodo Moeller]
+
+ *) In the NCONF_...-based implementations for CONF_... queries
+ (crypto/conf/conf_lib.c), if the input LHASH is NULL, avoid using
+ a temporary CONF structure with the data component set to NULL
+ (which gives segmentation faults in lh_retrieve).
+ Instead, use NULL for the CONF pointer in CONF_get_string and
+ CONF_get_number (which may use environment variables) and directly
+ return NULL from CONF_get_section.
+ [Bodo Moeller]
+
+ *) Fix potential buffer overrun for EBCDIC.
+ [Ulf Moeller]
+
+ *) Tolerate nonRepudiation as being valid for S/MIME signing and certSign
+ keyUsage if basicConstraints absent for a CA.
+ [Steve Henson]
+
+ *) Make SMIME_write_PKCS7() write mail header values with a format that
+ is more generally accepted (no spaces before the semicolon), since
+ some programs can't parse those values properly otherwise. Also make
+ sure BIO's that break lines after each write do not create invalid
+ headers.
+ [Richard Levitte]
+
+ *) Make the CRL encoding routines work with empty SEQUENCE OF. The
+ macros previously used would not encode an empty SEQUENCE OF
+ and break the signature.
+ [Steve Henson]
+ [This change does not apply to 0.9.7.]
+
+ *) Zero the premaster secret after deriving the master secret in
+ DH ciphersuites.
+ [Steve Henson]
+
+ *) Add some EVP_add_digest_alias registrations (as found in
+ OpenSSL_add_all_digests()) to SSL_library_init()
+ aka OpenSSL_add_ssl_algorithms(). This provides improved
+ compatibility with peers using X.509 certificates
+ with unconventional AlgorithmIdentifier OIDs.
+ [Bodo Moeller]
+
+ *) Fix for Irix with NO_ASM.
+ ["Bruce W. Forsberg" <bruce.forsberg@baesystems.com>]
+
+ *) ./config script fixes.
+ [Ulf Moeller, Richard Levitte]
+
+ *) Fix 'openssl passwd -1'.
+ [Bodo Moeller]
+
+ *) Change PKCS12_key_gen_asc() so it can cope with non null
+ terminated strings whose length is passed in the passlen
+ parameter, for example from PEM callbacks. This was done
+ by adding an extra length parameter to asc2uni().
+ [Steve Henson, reported by <oddissey@samsung.co.kr>]
+
+ *) Fix C code generated by 'openssl dsaparam -C': If a BN_bin2bn
+ call failed, free the DSA structure.
+ [Bodo Moeller]
+
+ *) Fix to uni2asc() to cope with zero length Unicode strings.
+ These are present in some PKCS#12 files.
+ [Steve Henson]
+
+ *) Increase s2->wbuf allocation by one byte in ssl2_new (ssl/s2_lib.c).
+ Otherwise do_ssl_write (ssl/s2_pkt.c) will write beyond buffer limits
+ when writing a 32767 byte record.
+ [Bodo Moeller; problem reported by Eric Day <eday@concentric.net>]
+
+ *) In RSA_eay_public_{en,ed}crypt and RSA_eay_mod_exp (rsa_eay.c),
+ obtain lock CRYPTO_LOCK_RSA before setting rsa->_method_mod_{n,p,q}.
+
+ (RSA objects have a reference count access to which is protected
+ by CRYPTO_LOCK_RSA [see rsa_lib.c, s3_srvr.c, ssl_cert.c, ssl_rsa.c],
+ so they are meant to be shared between threads.)
+ [Bodo Moeller, Geoff Thorpe; original patch submitted by
+ "Reddie, Steven" <Steven.Reddie@ca.com>]
+
+ *) Fix a deadlock in CRYPTO_mem_leaks().
+ [Bodo Moeller]
+
+ *) Use better test patterns in bntest.
+ [Ulf Möller]
+
+ *) rand_win.c fix for Borland C.
+ [Ulf Möller]
+
+ *) BN_rshift bugfix for n == 0.
+ [Bodo Moeller]
+
+ *) Add a 'bctest' script that checks for some known 'bc' bugs
+ so that 'make test' does not abort just because 'bc' is broken.
+ [Bodo Moeller]
+
+ *) Store verify_result within SSL_SESSION also for client side to
+ avoid potential security hole. (Re-used sessions on the client side
+ always resulted in verify_result==X509_V_OK, not using the original
+ result of the server certificate verification.)
+ [Lutz Jaenicke]
+
+ *) Fix ssl3_pending: If the record in s->s3->rrec is not of type
+ SSL3_RT_APPLICATION_DATA, return 0.
+ Similarly, change ssl2_pending to return 0 if SSL_in_init(s) is true.
+ [Bodo Moeller]
+
+ *) Fix SSL_peek:
+ Both ssl2_peek and ssl3_peek, which were totally broken in earlier
+ releases, have been re-implemented by renaming the previous
+ implementations of ssl2_read and ssl3_read to ssl2_read_internal
+ and ssl3_read_internal, respectively, and adding 'peek' parameters
+ to them. The new ssl[23]_{read,peek} functions are calls to
+ ssl[23]_read_internal with the 'peek' flag set appropriately.
+ A 'peek' parameter has also been added to ssl3_read_bytes, which
+ does the actual work for ssl3_read_internal.
+ [Bodo Moeller]
+
+ *) Initialise "ex_data" member of RSA/DSA/DH structures prior to calling
+ the method-specific "init()" handler. Also clean up ex_data after
+ calling the method-specific "finish()" handler. Previously, this was
+ happening the other way round.
+ [Geoff Thorpe]
+
+ *) Increase BN_CTX_NUM (the number of BIGNUMs in a BN_CTX) to 16.
+ The previous value, 12, was not always sufficient for BN_mod_exp().
+ [Bodo Moeller]
+
+ *) Make sure that shared libraries get the internal name engine with
+ the full version number and not just 0. This should mark the
+ shared libraries as not backward compatible. Of course, this should
+ be changed again when we can guarantee backward binary compatibility.
+ [Richard Levitte]
+
+ *) Fix typo in get_cert_by_subject() in by_dir.c
+ [Jean-Marc Desperrier <jean-marc.desperrier@certplus.com>]
+
+ *) Rework the system to generate shared libraries:
+
+ - Make note of the expected extension for the shared libraries and
+ if there is a need for symbolic links from for example libcrypto.so.0
+ to libcrypto.so.0.9.7. There is extended info in Configure for
+ that.
+
+ - Make as few rebuilds of the shared libraries as possible.
+
+ - Still avoid linking the OpenSSL programs with the shared libraries.
+
+ - When installing, install the shared libraries separately from the
+ static ones.