Newer
Older
*) 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].)
*) 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]
*) 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_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]
The following entry accidentally 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]
*) 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'.
*) 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.
*) 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.
*) 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_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.
*) Clean old EAY MD5 hack from e_os.h.
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
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
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]
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
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
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]
Richard Levitte
committed
*) 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]
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]
*) [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]
*) 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
[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
[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. (CVE-2002-0656)
[Ben Laurie (CHATS)]
*) Remote buffer overflow in SSL2 protocol - an attacker could
supply an oversized client master key. (CVE-2002-0656)
*) 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>]
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
*) 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]
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
*) 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 circumvents 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 occurred. (Neither SSLerr() codes nor alerts
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
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>]
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829
7830
7831
7832
7833
7834
7835
7836
7837
7838
7839
7840
7841
7842
7843
7844
7845
*) 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.
7847
7848
7849
7850
7851
7852
7853
7854
7855
7856
7857
7858
7859
7860
7861
7862
7863
7864
7865
7866
7867
7868
7869
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888
7889
7890
7891
7892
7893
7894
7895
7896
7897
7898
7899
7900
7901
7902
7903
7904
7905
7906
7907
7908
7909
7910
7911
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922
7923
7924
7925
7926
7927
7928
7929
7930
7931
7932
7933
7934
7935
7936
7937
7938
7939
7940
7941
7942
7943
7944
7945
7946
7947
7948
7949
7950
7951
7952
7953
7954
7955
7956
7957
7958
7959
7960
7961
7962
7963
7964
7965
7966
7967
7968
7969
7970
7971
7972
7973
7974
7975
7976
7977
7978
7979
7980
7981
7982
7983
7984
7985
7986
7987
7988
7989
7990
7991
7992
7993
7994
7995
7996
7997
7998
7999
8000
*) 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).