libssh 0.7.5

sc25519.h
1 /* $OpenBSD: sc25519.h,v 1.3 2013/12/09 11:03:45 markus Exp $ */
2
3 /*
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 */
8
9 #ifndef SC25519_H
10 #define SC25519_H
11
12 #define sc25519 crypto_sign_ed25519_ref_sc25519
13 #define shortsc25519 crypto_sign_ed25519_ref_shortsc25519
14 #define sc25519_from32bytes crypto_sign_ed25519_ref_sc25519_from32bytes
15 #define shortsc25519_from16bytes crypto_sign_ed25519_ref_shortsc25519_from16bytes
16 #define sc25519_from64bytes crypto_sign_ed25519_ref_sc25519_from64bytes
17 #define sc25519_from_shortsc crypto_sign_ed25519_ref_sc25519_from_shortsc
18 #define sc25519_to32bytes crypto_sign_ed25519_ref_sc25519_to32bytes
19 #define sc25519_iszero_vartime crypto_sign_ed25519_ref_sc25519_iszero_vartime
20 #define sc25519_isshort_vartime crypto_sign_ed25519_ref_sc25519_isshort_vartime
21 #define sc25519_lt_vartime crypto_sign_ed25519_ref_sc25519_lt_vartime
22 #define sc25519_add crypto_sign_ed25519_ref_sc25519_add
23 #define sc25519_sub_nored crypto_sign_ed25519_ref_sc25519_sub_nored
24 #define sc25519_mul crypto_sign_ed25519_ref_sc25519_mul
25 #define sc25519_mul_shortsc crypto_sign_ed25519_ref_sc25519_mul_shortsc
26 #define sc25519_window3 crypto_sign_ed25519_ref_sc25519_window3
27 #define sc25519_window5 crypto_sign_ed25519_ref_sc25519_window5
28 #define sc25519_2interleave2 crypto_sign_ed25519_ref_sc25519_2interleave2
29
30 typedef struct {
31 uint32_t v[32];
32 } sc25519;
33
34 typedef struct {
35 uint32_t v[16];
36 } shortsc25519;
37
38 void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]);
39
40 void shortsc25519_from16bytes(shortsc25519 *r, const unsigned char x[16]);
41
42 void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]);
43
44 void sc25519_from_shortsc(sc25519 *r, const shortsc25519 *x);
45
46 void sc25519_to32bytes(unsigned char r[32], const sc25519 *x);
47
48 int sc25519_iszero_vartime(const sc25519 *x);
49
50 int sc25519_isshort_vartime(const sc25519 *x);
51
52 int sc25519_lt_vartime(const sc25519 *x, const sc25519 *y);
53
54 void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y);
55
56 void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y);
57
58 void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y);
59
60 void sc25519_mul_shortsc(sc25519 *r, const sc25519 *x, const shortsc25519 *y);
61
62 /* Convert s into a representation of the form \sum_{i=0}^{84}r[i]2^3
63 * with r[i] in {-4,...,3}
64 */
65 void sc25519_window3(signed char r[85], const sc25519 *s);
66
67 /* Convert s into a representation of the form \sum_{i=0}^{50}r[i]2^5
68 * with r[i] in {-16,...,15}
69 */
70 void sc25519_window5(signed char r[51], const sc25519 *s);
71
72 void sc25519_2interleave2(unsigned char r[127], const sc25519 *s1, const sc25519 *s2);
73
74 #endif