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89 commits

Author SHA1 Message Date
Henry de Valence
0678e619cc Implement Mul for basepoint tables 2017-05-03 19:32:30 -07:00
Henry de Valence
6ea1d4dad2 Add an implementation of Scalar inversion 2017-04-28 22:59:56 -07:00
Henry de Valence
b5ccb42759 Rename lminus1 to l_minus_1 2017-04-28 22:54:00 -07:00
Henry de Valence
73e172484c Add tick marks around code items in docs 2017-04-02 23:12:18 +02:00
Henry de Valence
cf9f9aa402 Enable radix_51 on nightly 2017-03-13 17:04:37 -07:00
Henry de Valence
d6465ccd5e Fix remaining compile errors for radix_51 2017-03-13 16:38:05 -07:00
Henry de Valence
3eab4acbd8 Add p constant for subtraction 2017-03-13 16:38:05 -07:00
Henry de Valence
08ef9e5d1e Add constants in radix_51 form 2017-03-13 16:38:05 -07:00
Henry de Valence
afd42a4628 More feature-gating 2017-03-13 16:38:05 -07:00
Henry & Isis
c873f725a5 Rename BasepointTable as EdwardsBasepointTable. 2017-03-13 15:50:43 -07:00
Henry de Valence
640f40287f Wrap the existing basepoint table as a BasepointTable 2017-03-13 15:50:43 -07:00
Henry de Valence
b61ed818b8 Remove all remaining warnings 2017-03-07 01:37:31 -08:00
Henry de Valence
0585af6c68 Move sqrt(-(A+2)) test to constants.rs 2017-03-07 00:03:59 -08:00
Henry & Isis
e5f5dea444 Rename to_{cached,precomputed} to to_{projective,affine}_niels 2017-03-05 15:27:26 -08:00
Henry de Valence
45fbcb45f6 First notes and code on Montgomery conversion 2017-02-27 13:41:50 -08:00
Isis Lovecruft
e6b7192d5e
Merge branch 'feature/rename-niels-point' into develop 2017-02-25 01:26:33 +00:00
Isis Lovecruft
a649ea38ee
Rename {PreComputed,Cached}Point → {Affine,Projective}NielsPoint. 
* FIXES Issue #28: https://github.com/isislovecruft/curve25519-dalek/issues/28
 2017-02-25 00:47:06 +00:00
Henry de Valence
a202f36916 Rewrite invsqrt to avoid using an Option type. 2017-02-22 16:24:11 -08:00
Henry de Valence
f93dd4ccf5 Use is_identity() in the torsion subgroup tests. 
ht @dconnolly for pointing this out
 2017-02-21 15:13:18 -08:00
Henry & Isis
f52e2ee37e Create BasepointMult and ScalarMult traits. 2017-02-21 13:38:59 -08:00
Henry de Valence
a415caa9fb Add a seperate invsqrt function. 
This code isn't constant-time, but maybe should be.  However that would
prevent a bunch of nice things (e.g., Option types).  Probably good to
think about this.
 2017-02-21 13:38:58 -08:00
Henry de Valence
5720e249ab Add constants for points of the eight-torsion subgroup. 2017-02-21 13:23:57 -08:00
Henry de Valence
82041c2c67 Add constant for bytes of (p-1)/2. 2017-02-21 13:23:11 -08:00
Henry de Valence
363ea405d4 Add constant for a-d = -1-d 2017-02-21 13:23:11 -08:00
Henry de Valence
6fd3028956 Add constant for 4*d 2017-02-21 13:23:10 -08:00
Henry de Valence
fb0c431184 Add constant for MSQRT_M1, equal to -SQRT_M1 2017-02-21 13:23:10 -08:00
Henry de Valence
e1feb653be Add constant value of 1/2 (mod p) 2017-02-21 13:23:10 -08:00
Isis Lovecruft
32da4c7d50
Implement Neg for Scalar. 2017-02-21 05:41:14 +00:00
Isis Lovecruft
d4cccbc4d8
Whitespace cleanup in constants module. 2017-01-27 01:38:56 +00:00
Isis Lovecruft
8c986fb3da
Allow non-snakecase in constants. 
We follow the standard mathematical naming convention of lowercase to
denote affine coordinates and uppercase to for projective.
 2017-01-27 00:34:38 +00:00
Isis Lovecruft
3f900e60bd
Change CompressedPoint in constants module to CompressedEdwardsY. 2017-01-27 00:33:59 +00:00
Henry de Valence
46bf69b80e Test basepoint multiple generation 2017-01-09 16:15:23 -05:00
Henry de Valence
d94edc6a36 Move compressed basepoint into constants 
Would be good to have the basepoint itself, but this doesn't seem possible: the
fields of an ExtendedPoint are not public, so we can't construct them outside
of curve.rs (by design, to prevent constructing invalid points).  Maybe const
fn support could change this.
 2017-01-09 16:15:22 -05:00
Henry de Valence
16b4be6663 Add fixme on SQRT_MINUS_A 2017-01-08 15:11:16 -05:00
Henry de Valence
7ee568780b Shorten docstring on monty A value 2017-01-08 15:11:16 -05:00
Henry de Valence
8a5332b220 Remove unused, incorrect a value 
This was presumably added for use with formulas that use two multiplications by
small constants (i.e., 121665 and 121666) instead of one multiplication by a
large constant (i.e., -121665/121666), but we don't use those formulas.
 2017-01-08 15:11:16 -05:00
Henry de Valence
8fb9e44dd2 Test that d = -121665/121666 2017-01-08 15:11:16 -05:00
Henry de Valence
3f7d06138a Test that SQRT_M1 is a square root of -1 2017-01-08 15:11:15 -05:00
Henry de Valence
a9e3c330a6 Move constants into its own module 2017-01-08 14:39:25 -05:00