Commit graph

65 commits

Author SHA1 Message Date
Emilia Kasper
03af843039 Add a comment noting the padding oracle.
Reviewed-by: Andy Polyakov <appro@openssl.org>
2014-12-17 14:55:04 +01:00
Emilia Kasper
4ad2d3ac0e Revert "RT3425: constant-time evp_enc"
Causes more problems than it fixes: even though error codes
are not part of the stable API, several users rely on the
specific error code, and the change breaks them. Conversely,
we don't have any concrete use-cases for constant-time behaviour here.

This reverts commit 4aac102f75.

Reviewed-by: Andy Polyakov <appro@openssl.org>
2014-12-17 14:54:17 +01:00
Richard Levitte
7f09a8773b Include "constant_time_locl.h" rather than "../constant_time_locl.h".
The different -I compiler parameters will take care of the rest...

Reviewed-by: Tim Hudson <tjh@openssl.org>

Conflicts:
	crypto/evp/evp_enc.c
	crypto/rsa/rsa_oaep.c
	crypto/rsa/rsa_pk1.c
2014-10-15 17:00:06 +02:00
Emilia Kasper
4aac102f75 RT3425: constant-time evp_enc
Do the final padding check in EVP_DecryptFinal_ex in constant time to
avoid a timing leak from padding failure.

Reviewed-by: Rich Salz <rsalz@openssl.org>
2014-09-24 16:19:18 +02:00
Dr. Stephen Henson
97cf1f6c28 EVP support for wrapping algorithms.
Add support for key wrap algorithms via EVP interface.

Generalise AES wrap algorithm and add to modes, making existing
AES wrap algorithm a special case.

Move test code to evptests.txt
2013-07-17 21:45:00 +01:00
Dr. Stephen Henson
f94cfe6a12 only cleanup ctx if we need to, save ctx flags when we do 2012-02-10 16:55:17 +00:00
Bodo Möller
bf6d2f986d Make CTR mode behaviour consistent with other modes:
- clear ctx->num in EVP_CipherInit_ex
- adapt e_eas.c changes from http://cvs.openssl.org/chngview?cn=19816
  for eng_aesni.c

Submitted by: Emilia Kasper
2011-10-13 13:41:34 +00:00
Dr. Stephen Henson
4fc02f1229 Use a signed value to check return value of do_cipher(). 2011-03-21 17:37:27 +00:00
Dr. Stephen Henson
d45087c672 Use 0 not -1 (since type is size_t) for finalisation argument to do_cipher:
the NULL value for the input buffer is sufficient to notice this case.
2011-02-07 18:04:27 +00:00
Dr. Stephen Henson
3da0ca796c New flags EVP_CIPH_FLAG_CUSTOM_CIPHER in cipher structures if an underlying
cipher handles all cipher symantics itself.
2011-02-07 14:36:08 +00:00
Dr. Stephen Henson
776654adff PR: 2295
Submitted by: Alexei Khlebnikov <alexei.khlebnikov@opera.com>
Reviewed by: steve

OOM checking. Leak in OOM fix. Fall-through comment. Duplicate code
elimination.
2010-10-11 23:49:22 +00:00
Dr. Stephen Henson
2948fbab3a Fix ctr mode properly this time.... 2010-07-28 16:53:28 +00:00
Dr. Stephen Henson
081464fa14 Make ctr mode behaviour consistent with other modes. 2010-07-28 11:03:09 +00:00
Dr. Stephen Henson
da3955256d 'typo' 2010-03-01 01:53:34 +00:00
Dr. Stephen Henson
c2bf720842 Add missing function EVP_CIPHER_CTX_copy(). Current code uses memcpy() to copy
an EVP_CIPHER_CTX structure which may have problems with external ENGINEs
who need to duplicate internal handles etc.
2010-02-07 13:39:39 +00:00
Geoff Thorpe
6343829a39 Revert the size_t modifications from HEAD that had led to more
knock-on work than expected - they've been extracted into a patch
series that can be completed elsewhere, or in a different branch,
before merging back to HEAD.
2008-11-12 03:58:08 +00:00
Ben Laurie
5e4430e70d More size_tification. 2008-11-01 16:40:37 +00:00
Bodo Möller
2e415778f2 Don't use assertions to check application-provided arguments;
and don't unnecessarily fail on input size 0.
2008-08-14 21:37:51 +00:00
Dr. Stephen Henson
560b79cbff Constify version strings and some structures. 2007-01-21 13:07:17 +00:00
Dr. Stephen Henson
b40228a61d New functions to support opaque EVP_CIPHER_CTX handling. 2005-12-02 13:46:39 +00:00
Nils Larsch
b554eef43b the final byte of a pkcs7 padded plaintext can never be 0
Submitted by: K S Sreeram <sreeram@tachyontech.net>
2005-07-20 22:03:36 +00:00
Bodo Möller
8afca8d9c6 Fix more error codes.
(Also improve util/ck_errf.pl script, and occasionally
fix source code formatting.)
2005-05-11 03:45:39 +00:00
Geoff Thorpe
3a87a9b9db Reduce header interdependencies, initially in engine.h (the rest of the
changes are the fallout). As this could break source code that doesn't
directly include headers for interfaces it uses, changes to recursive
includes are covered by the OPENSSL_NO_DEPRECATED symbol. It's better to
define this when building and using openssl, and then adapt code where
necessary - this is how to stay current. However the mechanism exists for
the lethargic.
2004-04-19 17:46:04 +00:00
Dr. Stephen Henson
216659eb87 Enhance EVP code to generate random symmetric keys of the
appropriate form, for example correct DES parity.

Update S/MIME code and EVP_SealInit to use new functions.

PR: 700
2004-03-28 17:38:00 +00:00
Richard Levitte
2fe9ab8e20 It was pointed out to me that if the requested size is 0, we shouldn't
ty to allocate anything at all.  This will allow eNULL to still work.

PR: 751
Notified by: Lutz Jaenicke
2003-12-01 13:25:37 +00:00
Richard Levitte
1145e03870 Check that OPENSSL_malloc() really returned some memory.
PR: 751
Notified by: meder@mcs.anl.gov
Reviewed by: Lutz Jaenicke, Richard Levitte
2003-12-01 12:11:55 +00:00
Geoff Thorpe
2754597013 A general spring-cleaning (in autumn) to fix up signed/unsigned warnings.
I have tried to convert 'len' type variable declarations to unsigned as a
means to address these warnings when appropriate, but when in doubt I have
used casts in the comparisons instead. The better solution (that would get
us all lynched by API users) would be to go through and convert all the
function prototypes and structure definitions to use unsigned variables
except when signed is necessary. The proliferation of (signed) "int" for
strictly non-negative uses is unfortunate.
2003-10-29 20:24:15 +00:00
Richard Levitte
0b13e9f055 Add the possibility to build without the ENGINE framework.
PR: 287
2003-01-30 17:39:26 +00:00
Dr. Stephen Henson
59ae8c9419 EVP_DecryptInit() should call EVP_CipherInit() not EVP_CipherInit_ex(). 2003-01-17 00:48:47 +00:00
Richard Levitte
43d601641f A few more memset()s converted to OPENSSL_cleanse().
I *think* I got them all covered by now, bu please, if you find any more,
tell me and I'll correct it.
PR: 343
2002-11-29 11:30:45 +00:00
Ben Laurie
54a656ef08 Security fixes brought forward from 0.9.7. 2002-11-13 15:43:43 +00:00
Dr. Stephen Henson
544a2aea4b Zero cipher_data in EVP_CIPHER_CTX_cleanup
Add cleanup calls to evp_test.c

Allow reuse of cipher contexts by removing
automatic cleanup in EVP_*Final().
2002-05-15 18:49:25 +00:00
Dr. Stephen Henson
3e268d2717 Ensure EVP_CipherInit() uses the correct encode/decode parameter if
enc == -1

[Reported by Markus Friedl <markus@openbsd.org>]

Fix typo in dh_lib.c (use of DSAerr instead of DHerr).
2002-03-16 23:20:05 +00:00
Dr. Stephen Henson
bf6a9e66d6 Make ciphers and digests obtain an ENGINE functional reference
if impl is explicitly supplied.
2002-03-09 18:58:05 +00:00
Dr. Stephen Henson
a3829cb720 Updates from stable branch. 2002-02-23 13:50:29 +00:00
Dr. Stephen Henson
581f1c8494 Modify EVP cipher behaviour in a similar way
to digests to retain compatibility.
2001-10-17 00:37:12 +00:00
Geoff Thorpe
18eda73234 EVP_EncryptInit_ex() and EVP_DecryptInit_ex() had been defined in evp.h but
not implemented. (Bug reported by Martin Szotkowski)

This also changes the non-"_ex" versions to defer directly to
EVP_CipherInit_ex() rather than EVP_CipherInit() to avoid an unecessary
level of indirection.
2001-10-08 17:24:10 +00:00
Dr. Stephen Henson
f329b8d73b Make EVP_DecryptUpdate work again. 2001-10-02 16:19:49 +00:00
Geoff Thorpe
11a57c7be5 This changes EVP's cipher and digest code to hook via the ENGINE support.
See crypto/engine/README for details.

- it also removes openbsd_hw.c from the build (that functionality is
  going to be available in the openbsd ENGINE in a upcoming commit)

- evp_test has had the extra initialisation added so it will use (if
  possible) any ENGINEs supporting the algorithms required.
2001-09-25 21:37:02 +00:00
Ben Laurie
82b2230527 Add RC4 support to OpenBSD. 2001-08-18 16:04:36 +00:00
Ben Laurie
0e36019977 Add EVP test program. 2001-08-18 13:53:01 +00:00
Ben Laurie
f0446ca8d7 Move CIPHER_CTX cleanups to _Final routines instead of _Init, which avoids
problems with leaks and uninitialised structures.
2001-08-11 11:32:54 +00:00
Ben Laurie
db75357110 Fix memory leak. 2001-08-05 16:13:49 +00:00
Ben Laurie
dbad169019 Really add the EVP and all of the DES changes. 2001-07-30 23:57:25 +00:00
Dr. Stephen Henson
dc706cd35f Make sure *outl is always initialized in EVP_EncryptUpdate(). 2001-07-27 02:24:47 +00:00
Ben Laurie
c148d70978 A better compromise between encrypt and decrypt (but why isn't it as fast
for encrypt?).
2001-07-09 21:00:36 +00:00
Ben Laurie
7b6055d1af Handle the common case first (where input size is a multiple of block size).
Worth around 5% for encrypt. Slows down decrypt slightly, but I expect to
regain that later.
2001-07-08 19:42:10 +00:00
Ben Laurie
f31b12503e Use & instead of % - worth about 4% for 8 byte blocks. 2001-07-08 17:27:32 +00:00
Dr. Stephen Henson
f2e5ca84d4 Option to disable standard block padding with EVP API.
Add -nopad option to enc command.

Update docs.
2001-02-14 02:11:52 +00:00
Dr. Stephen Henson
49528751b8 More EVP cipher revision.
Change EVP_SealInit() and EVP_OpenInit() to
handle cipher parameters.

Make it possible to set RC2 and RC5 params.

Make RC2 ASN1 code use the effective key bits
and not the key length.

TODO: document how new API works.
2000-05-30 18:26:22 +00:00