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281 commits

Author SHA1 Message Date
Henry de Valence
b75a88458a Add monte carlo test for FieldElements 2017-03-13 16:38:05 -07:00
Henry de Valence
e1d3281c2d Add debug asserts for multiplication preconditions. 2017-03-13 16:38:05 -07:00
Henry de Valence
9524c079ee Reduce mod p in radix51 to_bytes 2017-03-13 16:38:05 -07:00
Henry de Valence
0fa8d8f4a7 Reduce to narrower range before to_bytes 2017-03-13 16:38:05 -07:00
Henry de Valence
24f11427a1 Add 2p to avoid underflows 2017-03-13 16:38:05 -07:00
Henry de Valence
a9cbca668b Implement squaring for radix51 2017-03-13 16:38:05 -07:00
Henry de Valence
df080411e0 Implement multiply() for radix51 2017-03-13 16:38:05 -07:00
Henry de Valence
d6465ccd5e Fix remaining compile errors for radix_51 2017-03-13 16:38:05 -07:00
Henry de Valence
147b9d90b8 Revert "Add radix51 impl of reduce" 
This reverts commit 488e886d1e1b11400dedc6c41e7108e34c6747cc.
 2017-03-13 16:38:05 -07:00
Henry de Valence
75baefabeb Stub remaining radix_51 functions with unimplemented!() 2017-03-13 16:38:05 -07:00
Henry de Valence
b515e43dfd Move to_bytes_64 to to_bytes for radix51 2017-03-13 16:38:05 -07:00
Henry de Valence
7591c74018 Add radix51 impl of reduce 2017-03-13 16:38:05 -07:00
Henry de Valence
08ac5a9068 Add radix51 impl of from_bytes 2017-03-13 16:38:05 -07:00
Henry de Valence
7f8b3fe594 Rename combine_coeffs to reduce 2017-03-13 16:38:05 -07:00
Henry de Valence
f16f5d1e73 Add minus_one for radix51 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
4ef22b679c Implement sub_assign for radix_51 2017-03-13 16:38:05 -07:00
Henry de Valence
87001f9d6e Add utility for extracting constants in the new repr 2017-03-13 16:38:05 -07:00
Henry de Valence
4db735ca44 Add subtraction stub 2017-03-13 16:38:05 -07:00
Henry de Valence
eb66088cb9 Add to/from bytes for radix 51 2017-03-13 16:38:05 -07:00
Henry de Valence
afd42a4628 More feature-gating 2017-03-13 16:38:05 -07:00
Henry de Valence
a884260341 Add radix_51 and radix_25_5 features and start feature-gating 2017-03-13 16:38:05 -07:00
Henry de Valence
3a55a2f410 Add a test for radix-51 multiplication 2017-03-13 16:36:32 -07:00
Henry de Valence
92bf47f990 Clean up field tests 2017-03-13 16:36:32 -07:00
Henry de Valence
97b60d61ab draft of 64-bit multiplication 2017-03-13 16:36:32 -07:00
Isis Lovecruft
10fa989883
Print "CompressedEdwardsY" in Debug impl, not "CompressedPoint". 2017-03-13 23:29:13 +00:00
Henry de Valence
2610ab872a Feature-gate basepoint table creation on a nightly feature 2017-03-13 16:28:52 -07:00
Henry & Isis
049556147f Add wrapper for basepoint precomputations for decaf 2017-03-13 15:50:44 -07:00
Henry & Isis
c873f725a5 Rename BasepointTable as EdwardsBasepointTable. 2017-03-13 15:50:43 -07:00
Henry & Isis
f312160d2c Fixup errors introduced from not running yolocrypto tests by default 2017-03-13 15:50:43 -07:00
Henry de Valence
e757959bb8 Add benchmark for basepoint table creation 2017-03-13 15:50:43 -07:00
Henry de Valence
a4ed8e2b81 Use box syntax instead of an unsafe block 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
05fa1318b9 First work on dynamic basepoint table generation 2017-03-13 15:50:41 -07:00
Henry & Isis
7a2ea44ce6 Test multiplication by basepoint order 2017-03-13 15:49:18 -07:00
Henry de Valence
80d4566853 Merge remote-tracking branch 'tarcieri/nostd-cleanups' into develop 2017-03-13 15:00:20 -07:00
Isis Lovecruft
65136a202a
Merge remote-tracking branch 'isislovecruft/develop' into develop 2017-03-13 21:52:20 +00:00
Isis Lovecruft
f9c237bd6a
Typo fix in utils module docstring. 2017-03-10 02:36:15 +00:00
Isis Lovecruft
1f871ea0a0
Obsessive whitespace fix. 2017-03-10 02:36:01 +00:00
Isis Lovecruft
2039a66cb3
Fix two decaf unittests to use compress_edwards(). 2017-03-10 02:35:38 +00:00
Tony Arcieri
384cf1df31 no_std import cleanups 
- Gate no_std on the "std" feature
- Import core when std is present
- Import collections when std is absent
- Add a placeholder gated "use" directive for Box in curve.rs
 2017-03-08 00:19:08 -08:00
Henry de Valence
ab6d32efe1 Make functions pub to suppress dead code warnings 2017-03-07 23:03:48 -08:00
Henry de Valence
0e9dc1d38d Remove warnings about unused variables 
These bindings are shadowed by the later let statements, so they're considered unused.
 2017-03-07 23:01:49 -08:00
Henry de Valence
3f208359b3 Merge branch 'feature/test-reorg' into develop 2017-03-07 22:20:22 -08:00
Henry de Valence
b61ed818b8 Remove all remaining warnings 2017-03-07 01:37:31 -08:00
Henry de Valence
913e699145 Rename Decaf tests 2017-03-07 01:28:38 -08:00
Henry de Valence
e446bc8a1f The identity point is already in EIGHT_TORSION 2017-03-07 00:58:32 -08:00
Henry de Valence
cf24cb8900 Also test points that are not the identity 2017-03-07 00:58:32 -08:00
Henry de Valence
47143e9114 Rewrite conditional assignment test for AffineNielsPoints 2017-03-07 00:58:32 -08:00
Henry de Valence
9414a2f4db Remove old tests that aren't so useful any more 2017-03-07 00:49:21 -08:00
Henry de Valence
78fe9c490d Eliminate BASE_CMPRSSD or rename it to constants::BASE_CMPRSSD and do misc cleanup 2017-03-07 00:48:36 -08:00
Henry de Valence
94416eb1cb Clean decompression_sign_handling 2017-03-07 00:11:47 -08:00
Henry de Valence
b5b0ac7628 Add doc comments to test vectors 2017-03-07 00:11:16 -08:00
Henry de Valence
0585af6c68 Move sqrt(-(A+2)) test to constants.rs 2017-03-07 00:03:59 -08:00
Henry de Valence
3a9ee16a30 Remove test_ prefix from test functions in curve.rs 2017-03-06 23:59:49 -08:00
Henry de Valence
31c350b6f2 Split benchmarks into their own module 2017-03-06 23:53:38 -08:00
Isis Lovecruft
9f0c6c86f3
Change another unittest compress() to compress_edwards(). 2017-03-07 01:33:38 +00:00
Henry & Isis
e5f5dea444 Rename to_{cached,precomputed} to to_{projective,affine}_niels 2017-03-05 15:27:26 -08:00
Isis Lovecruft
9171a03894
Merge branch 'feature/rename-compress' into develop 2017-03-04 05:52:57 +00:00
Isis Lovecruft
b81f84bee8
Merge branch 'feature/montgomery-x-format_r1' into develop 2017-03-04 05:48:12 +00:00
Isis Lovecruft
2c83d48cfa
Demote a docstring note to inline code comment to avoid confusing users. 2017-03-04 05:29:19 +00:00
Isis Lovecruft
20ace8da48
Rename compress() to compress_edwards(). 2017-03-04 03:41:47 +00:00
Isis Lovecruft
cfd0e8ad6e
Add method for recovery of Edwards x-coordinate given Montgomery (u, v). 
This function is necessary for matching Signal's hash_to_point() behaviour.
 2017-03-04 03:39:58 +00:00
Isis Lovecruft
b9de92aeaf
Add benchmarks for Edwards-Y and Mongomery-U decompression. 2017-03-04 03:39:57 +00:00
Isis Lovecruft
915f41c643
Fixup CompressedMontgomeryU::decompress() and ensure no divide-by-zeroes. 
Also, match Signal behaviour, and split off recovery of other
coordinates into separate functions.
 2017-03-04 03:39:56 +00:00
Isis Lovecruft
5edd8d6d26
Merge remote-tracking branch 'hdevalence/feature/montgomery-x-format_r1' into develop 2017-03-04 02:40:17 +00:00
Isis Lovecruft
1c9637490c
Obsessive whitespace fix. 2017-03-04 02:00:59 +00:00
Henry de Valence
5d3d114628 fixup! Properly handle exceptional points. 2017-02-27 23:15:39 -08:00
Isis Lovecruft
f48947fb57
Merge remote-tracking branch 'hdevalence/feature/some-cleanup-tweaks' into develop 2017-02-28 05:50:22 +00:00
Henry de Valence
db53b58e89 Properly handle exceptional points. 2017-02-27 21:13:24 -08:00
Henry de Valence
19d452c2dc Test decompressing an invalid montgomery point 2017-02-27 13:42:13 -08:00
Henry de Valence
45fbcb45f6 First notes and code on Montgomery conversion 2017-02-27 13:41:50 -08:00
Henry de Valence
fe15bc1d0b Add note on fn main() in doctest 2017-02-27 11:22:07 -08:00
Henry de Valence
a93798d209 Add a function to hash a byte slice to a scalar. 2017-02-27 11:19:06 -08:00
Henry de Valence
e5c0d789fd Add a Scalar::as_bytes() method. 2017-02-26 15:25:05 -08:00
Henry de Valence
950519b97b Implement Debug for Scalar 2017-02-26 15:25:05 -08:00
Henry de Valence
1dac2f53bb Implement Identity for CompressedEdwardsY 2017-02-26 15:25:05 -08:00
Henry de Valence
f39566cf16 Change CompressedDecaf::to_bytes to ::as_bytes 2017-02-26 15:25:05 -08:00
Henry de Valence
2cef5fcecd Add CompressedEdwardsY::as_bytes 2017-02-26 15:25:05 -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
d450659b7f Rewrite CompressedEdwardsY::decompress() to use FieldElement::sqrt_ratio 2017-02-22 20:59:51 -08:00
Henry de Valence
1febf3f753 Add an invsqrt_ratio function. 2017-02-22 20:59:50 -08:00
Henry de Valence
a202f36916 Rewrite invsqrt to avoid using an Option type. 2017-02-22 16:24:11 -08:00
Isis Lovecruft
74feb0db75
Merge remote-tracking branch 'hdevalence/feature/decaf_r15' into develop 2017-02-22 05:30:18 +00:00
Isis Lovecruft
ff28cacd13
Enable std and std macros during test builds. 2017-02-22 03:07:57 +00:00
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 de Valence
9473299d04 Add benchmarks for Decaf [de]compression 2017-02-21 14:59:25 -08:00
Henry de Valence
dd8f17dfb3 Add note on feature-gating 2017-02-21 13:43:10 -08:00
Henry de Valence
95bf09a335 Check xy is nonnegative, y nonzero in decoding. 2017-02-21 13:43:09 -08:00
Henry de Valence
5daa217b18 Fix sign error 2017-02-21 13:43:09 -08:00
Henry de Valence
6b3dbf6870 Add another test and some notes 2017-02-21 13:43:09 -08:00
Henry de Valence
93be83c6df Check that s = |s| in decompression. 2017-02-21 13:43:09 -08:00
Henry de Valence
9cb48c44ba Use conditional_negate in Decaf 2017-02-21 13:43:03 -08:00
Henry & Isis
c2bee88c0f Add a feature gate for unfinished implementations. 2017-02-21 13:39:01 -08:00
Henry & Isis
ea5efcdc29 Add impl of Identity for DecafPoint and CompressedDecaf 2017-02-21 13:39:00 -08:00
Henry & Isis
f06afbc493 Add a coset4 function for debugging 2017-02-21 13:39:00 -08:00
Henry & Isis
375d326e75 Change some tests to use new API 2017-02-21 13:39:00 -08:00
Henry & Isis
db17dc4b78 Add Eq implementation for DecafPoint 2017-02-21 13:39:00 -08:00
Henry & Isis
bf19df64f0 Add ScalarMult and BasepointMult impls for DecafPoint 2017-02-21 13:39:00 -08:00
Henry & Isis
084c29c4ed Implement addition and subtraction for DecafPoint. 2017-02-21 13:39:00 -08:00
Henry & Isis
f52e2ee37e Create BasepointMult and ScalarMult traits. 2017-02-21 13:38:59 -08:00
Henry de Valence
66e598a47c Minor doc tweaks 2017-02-21 13:38:59 -08:00
Henry de Valence
0992237233 XY is a misleading variable name, use T instead 2017-02-21 13:38:59 -08:00
Henry de Valence
ec82e7a4f4 Create a DecafPoint struct, wrapping an ExtendedPoint 2017-02-21 13:38:59 -08:00
Henry de Valence
08fc10f356 Rename DecafPoint -> CompressedDecaf 2017-02-21 13:38:59 -08:00
Henry de Valence
eec7747be7 Move Decaf code to decaf.rs 2017-02-21 13:38:59 -08:00
Henry de Valence
f18ebe9430 First draft of decaf decompression 2017-02-21 13:38:58 -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
ee5958c407 Add is_[non]negative_decaf functions. 
Computes whether a point is nonnegative in the same way as Mike Hamburg's code.
 2017-02-21 13:37:50 -08:00
Henry de Valence
3fc5f75300 Rename is_negative to is_negative_ed25519 2017-02-21 13:23:57 -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
ee5ea0a013 Make double functions public 2017-02-21 13:23:11 -08:00
Henry de Valence
dd23a48ade Make ExtendedPoint attrs pub as we need them in constants.rs 2017-02-21 13:23:11 -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
Henry de Valence
79afc6bd0f Add debugging checks to test if points are on the curve 2017-02-21 13:23:10 -08:00
Henry de Valence
cb4ff3097c Add FieldElement::is_zero() 2017-02-21 13:23:10 -08:00
Isis Lovecruft
44e7d500db
Remove unused import of PartialEq and Eq in curve module. 2017-02-21 21:01:58 +00:00
Isis Lovecruft
e4d041836e
Move load3 and load4 to new utils module and remove #[allow(dead_code)]. 2017-02-21 06:15:08 +00:00
Isis Lovecruft
4b738c7e19
Remove #[allow(dead_code)] from arrays_equal_ct(). 2017-02-21 06:06:16 +00:00
Isis Lovecruft
6f67a7d716
Rename util module to subtle. 
* CHANGE subtle module documentation slightly to clarify the module's purpose.
 * FIXES issue #25.
 2017-02-21 06:01:22 +00:00
Isis Lovecruft
3eb5dcaae7
Implement CTEq for ExtendedPoint. 2017-02-21 05:45:37 +00:00
Isis Lovecruft
b1afdf5204
Implement CTEq for FieldElement. 2017-02-21 05:44:35 +00:00
Isis Lovecruft
5308fef210
Add CTEq trait and implement it for Scalar. 2017-02-21 05:44:35 +00:00
Isis Lovecruft
1381e07ffb
Implement a method for determining if an element is the identity. 
This corresponds to ge_isneutral() in Open Whispersystems' ed25519 library.
 2017-02-21 05:43:20 +00:00
Isis Lovecruft
03589dff43
Add method for determining if an ExtendedPoint is of small order. 2017-02-21 05:41:16 +00:00
Isis Lovecruft
7b57be69fd
Implement constant time equality check for scalars. 2017-02-21 05:41:14 +00:00
Isis Lovecruft
32da4c7d50
Implement Neg for Scalar. 2017-02-21 05:41:14 +00:00
Isis Lovecruft
51f59565f5
Typo fix; Negateable → Negatable. 
* Fixup on #22.
 2017-02-21 04:15:15 +00:00
Isis Lovecruft
9154e59ec1
Merge remote-tracking branch 'hdevalence/feature/conditional-negation' into develop 2017-02-21 04:13:29 +00:00
Isis Lovecruft
8c432ef78a
Another obsessive compulsive whitespace fix. 2017-02-21 01:46:01 +00:00
Henry de Valence
dc5621f527 Use conditional_negate in select_precomputed_point 2017-02-20 15:30:59 -08:00
Henry de Valence
8a1c13ef49 Make a CTNegateable trait with a generic impl for better ergonomics 2017-02-20 15:30:59 -08:00
Henry de Valence
5f4de0074d Add a conditional negation function. 2017-02-20 15:30:59 -08:00
Isis Lovecruft
57884ecefa
Merge remote-tracking branch 'hdevalence/feature/derive-eq-partialeq-compressededwardsy' into develop 2017-02-20 02:14:37 +00:00
Isis Lovecruft
5f70ab55f8
Obsessive compulsive whitespace fix. 2017-02-20 01:58:56 +00:00
Henry de Valence
eaa5d3e595 Derive Eq, PartialEq for CompressedEdwardsY 2017-02-19 17:39:48 -05:00
Isis Lovecruft
1e7199dcc4
Remove now unused core::clone::Clone from scalar. 2017-01-27 02:16:30 +00:00
Isis Lovecruft
366e9029bf
Rename a CompressedPoint from #17 to CompressedEdwardsY (from #6). 2017-01-27 02:15:31 +00:00
Isis Lovecruft
d88b6c01c4
Merge remote-tracking branch 'tarcieri/no-std' into develop 2017-01-27 02:13:04 +00:00
Isis Lovecruft
d4cccbc4d8
Whitespace cleanup in constants module. 2017-01-27 01:38:56 +00:00
Isis Lovecruft
0c14f58797
Merge remote-tracking branch 'burdges/patch-1' into develop 2017-01-27 00:40:32 +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
Isis Lovecruft
1d964fa4b7
Merge remote-tracking branch 'hdevalence/feature/seperate-constants-file' into develop 2017-01-27 00:15:31 +00:00