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34 commits

Author SHA1 Message Date
Bodo Moeller
44a8fced97 Further improve/fix ec_GFp_simple_points_make_affine (ecp_smpl.c) and 
group_order_tests (ectest.c).  Also fix the EC_POINTs_mul documentation (ec.h).

Reviewed-by: emilia@openssl.org

Conflicts:
	crypto/ec/ectest.c

Conflicts:
	crypto/ec/ec.h
 2014-08-13 18:09:00 +02:00
Bodo Moeller
681d11b6fd Simplify and fix ec_GFp_simple_points_make_affine 
(which didn't always handle value 0 correctly).

Reviewed-by: emilia@openssl.org

Conflicts:
	CHANGES
	crypto/ec/ectest.c
 2014-08-01 17:59:31 +02:00
Dr. Stephen Henson
6056afd223 PR: 1612 
Submitted by: Robert Jackson <robert@rjsweb.net>
Reviewed by: steve

Fix EC_POINT_cmp function for case where b but not a is the point at infinity.
 2011-01-24 14:42:11 +00:00
Nils Larsch
b7a80146f4 fix error found by coverity: check if ctx is != NULL before calling BN_CTX_end() 2006-03-13 23:12:08 +00:00
Nils Larsch
ff22e913a3 - use BN_set_negative and BN_is_negative instead of BN_set_sign 
and BN_get_sign
- implement BN_set_negative as a function
- always use "#define BN_is_zero(a) ((a)->top == 0)"
 2005-04-22 20:02:44 +00:00
Geoff Thorpe
7f5b4dd1e8 Using Horner's algorithm to evaluate the ec polynomial 
(suggested by Adam Young <ayoung@cigital.com>)

Submitted by: Nils Larsch
 2004-07-16 03:24:19 +00:00
Geoff Thorpe
ace3ebd661 Improve error handling if decompression of an ec point fails, and cleanup 
ec_curve.c (unify comments, etc).

Submitted by: Nils Larsch
Reviewed by: Bodo Moeller, Geoff Thorpe
 2004-07-06 15:50:04 +00:00
Richard Levitte
560f7abb7e Make sure we use unsigned constants, or come compilers may complain. 2004-03-15 22:33:19 +00:00
Geoff Thorpe
b6358c89a1 Convert openssl code not to assume the deprecated form of BN_zero(). 
Remove certain redundant BN_zero() initialisations, because BN_CTX_get(),
BN_init(), [etc] already initialise to zero.

Correct error checking in bn_sqr.c, and be less wishy-wash about how/why
the result's 'top' value is set (note also, 'max' is always > 0 at this
point).
 2004-03-13 23:57:20 +00:00
Bodo Möller
37c660ff9b implement fast point multiplication with precomputation 
Submitted by: Nils Larsch
Reviewed by: Bodo Moeller
 2003-02-06 19:25:12 +00:00
Bodo Möller
922fa76e26 add a comment 2002-11-22 09:25:35 +00:00
Bodo Möller
137445140b Make ec_GFp_simple_point_get_affine_coordinates() faster 
for Montgomery representations.

Submitted by: Sheueling Chang, Bodo Moeller
 2002-11-20 10:53:33 +00:00
Bodo Möller
b53e44e572 implement and use new macros BN_get_sign(), BN_set_sign() 
Submitted by: Nils Larsch
 2002-11-04 13:17:22 +00:00
Bodo Möller
6fb60a84dd Change BN_mod_sqrt() so that it verifies that the input value is 
really the square of the return value.
 2002-08-02 14:57:53 +00:00
Bodo Möller
35b73a1f20 Rename implementations of method functions so that they match 
the new method names where _GF... suffixes have been removed.

Revert changes to ..._{get/set}_Jprojective_coordinates_...:
The current implementation for ECC over binary fields does not use
projective coordinates, and if it did, it would not use Jacobian
projective coordinates; so it's OK to use the ..._GFp prefix for all
this.

Add author attributions to some files so that it doesn't look
as if Sun wrote all of this :-)
 2002-08-02 14:28:37 +00:00
Bodo Möller
7793f30e09 add support for elliptic curves over binary fields 
Submitted by: Duglas Stebila <douglas.stebila@sun.com>,
              Sheueling Chang <sheueling.chang@sun.com>

(CHANGES entries by Bodo Moeller)
 2002-08-02 13:42:24 +00:00
Bodo Möller
458c29175e move ECC ASN1 that is not specific to ECDSA into crypto/ec/, 
and make some appropriate changes to the EC library.

Submitted by: Nils Larsch
 2002-06-10 12:18:21 +00:00
Richard Levitte
02cbedc387 Make sure short aliases are used where required. 2002-05-23 13:52:36 +00:00
Bodo Möller
b6db386ffd Change internals of the EC library so that the functions 
EC_GROUP_{set_generator,get_generator,get_order,get_cofactor} are
implemented directly in crypto/ec/ec_lib.c and not dispatched to
methods.

Also fix EC_GROUP_copy to copy the NID.
 2002-05-08 11:54:24 +00:00
Bodo Möller
17d6bb8158 New function EC_GROUP_check_discriminant(). 
Restructure implementation of EC_GROUP_check().

Submitted by: Nils Larsch
 2002-03-20 10:18:07 +00:00
Bodo Möller
af28dd6c75 Fix bugs and typos. 
Add some WTLS curves.
New function EC_GROUP_check() (this will probably
be implemented differently soon).

Submitted by: Nils Larsch
Reviewed by: Bodo Moeller
 2002-03-18 13:10:45 +00:00
Richard Levitte
1f0af2c073 len is a size_t, which is an unsigned integer. Therefore, some 
compilers will complain against the check for less than zero.
 2001-05-14 11:56:47 +00:00
Bodo Möller
48fe4d6233 More EC stuff, including EC_POINTs_mul() for simultaneous scalar 
multiplication of an arbitrary number of points.
 2001-03-10 23:18:35 +00:00
Bodo Möller
42909e3968 Fix ec_GFp_simple_cmp. 
Use example group from Annex I of X9.62 in ectest.c.
 2001-03-08 22:52:49 +00:00
Bodo Möller
156e85578d Implement EC_GFp_mont_method. 2001-03-08 20:55:16 +00:00
Bodo Möller
bb62a8b0c5 More method functions for elliptic curves, 
and an ectest.c that actually tests something.
 2001-03-08 19:14:52 +00:00
Bodo Möller
1d5bd6cf71 More 'TODO' items. 2001-03-08 11:16:33 +00:00
Bodo Möller
226cc7ded4 More method functions for EC_GFp_simple_method. 2001-03-08 01:23:28 +00:00
Bodo Möller
e869d4bd32 More method functions. 2001-03-07 20:56:48 +00:00
Bodo Möller
60428dbf0a Some actual method functions (not enough yet to use the EC library, though), 
including EC arithmetics derived from Lenka Fibikova's code (with some
additional optimizations).
 2001-03-07 19:54:35 +00:00
Bodo Möller
58fc62296f The next bunch of vaporware. 2001-03-07 09:29:45 +00:00
Bodo Möller
0657bf9c14 Implement dispatcher for EC_GROUP and EC_POINT method functions. 
Initial EC_GROUP_new_curve_GFp implementation.
 2001-03-07 01:17:05 +00:00
Bodo Möller
38e3c5815c Add yet another (still empty) source code file that I forgot. 2001-03-05 20:31:49 +00:00
Bodo Möller
f8fe20e0d9 Add more EC vaporware (empty source code files I missed in my 
previous commit).
 2001-03-05 20:14:00 +00:00