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Damien Miller8a56dc22013-12-18 17:48:11 +11001/* $OpenBSD: sc25519.h,v 1.3 2013/12/09 11:03:45 markus Exp $ */
Damien Miller5be9d9e2013-12-07 11:24:01 +11002
Damien Miller8a56dc22013-12-18 17:48:11 +11003/*
4 * Public Domain, Authors: Daniel J. Bernstein, Niels Duif, Tanja Lange,
5 * Peter Schwabe, Bo-Yin Yang.
6 * Copied from supercop-20130419/crypto_sign/ed25519/ref/sc25519.h
7 */
Damien Miller5be9d9e2013-12-07 11:24:01 +11008
9#ifndef SC25519_H
10#define SC25519_H
11
12#include "crypto_api.h"
13
14#define sc25519 crypto_sign_ed25519_ref_sc25519
15#define shortsc25519 crypto_sign_ed25519_ref_shortsc25519
16#define sc25519_from32bytes crypto_sign_ed25519_ref_sc25519_from32bytes
17#define shortsc25519_from16bytes crypto_sign_ed25519_ref_shortsc25519_from16bytes
18#define sc25519_from64bytes crypto_sign_ed25519_ref_sc25519_from64bytes
19#define sc25519_from_shortsc crypto_sign_ed25519_ref_sc25519_from_shortsc
20#define sc25519_to32bytes crypto_sign_ed25519_ref_sc25519_to32bytes
21#define sc25519_iszero_vartime crypto_sign_ed25519_ref_sc25519_iszero_vartime
22#define sc25519_isshort_vartime crypto_sign_ed25519_ref_sc25519_isshort_vartime
23#define sc25519_lt_vartime crypto_sign_ed25519_ref_sc25519_lt_vartime
24#define sc25519_add crypto_sign_ed25519_ref_sc25519_add
25#define sc25519_sub_nored crypto_sign_ed25519_ref_sc25519_sub_nored
26#define sc25519_mul crypto_sign_ed25519_ref_sc25519_mul
27#define sc25519_mul_shortsc crypto_sign_ed25519_ref_sc25519_mul_shortsc
28#define sc25519_window3 crypto_sign_ed25519_ref_sc25519_window3
29#define sc25519_window5 crypto_sign_ed25519_ref_sc25519_window5
30#define sc25519_2interleave2 crypto_sign_ed25519_ref_sc25519_2interleave2
31
32typedef struct
33{
34 crypto_uint32 v[32];
35}
36sc25519;
37
38typedef struct
39{
40 crypto_uint32 v[16];
41}
42shortsc25519;
43
44void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]);
45
46void shortsc25519_from16bytes(shortsc25519 *r, const unsigned char x[16]);
47
48void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]);
49
50void sc25519_from_shortsc(sc25519 *r, const shortsc25519 *x);
51
52void sc25519_to32bytes(unsigned char r[32], const sc25519 *x);
53
54int sc25519_iszero_vartime(const sc25519 *x);
55
56int sc25519_isshort_vartime(const sc25519 *x);
57
58int sc25519_lt_vartime(const sc25519 *x, const sc25519 *y);
59
60void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y);
61
62void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y);
63
64void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y);
65
66void sc25519_mul_shortsc(sc25519 *r, const sc25519 *x, const shortsc25519 *y);
67
68/* Convert s into a representation of the form \sum_{i=0}^{84}r[i]2^3
69 * with r[i] in {-4,...,3}
70 */
71void sc25519_window3(signed char r[85], const sc25519 *s);
72
73/* Convert s into a representation of the form \sum_{i=0}^{50}r[i]2^5
74 * with r[i] in {-16,...,15}
75 */
76void sc25519_window5(signed char r[51], const sc25519 *s);
77
78void sc25519_2interleave2(unsigned char r[127], const sc25519 *s1, const sc25519 *s2);
79
80#endif