1 #ifndef SC25519_H
2 #define SC25519_H
3 
4 #define sc25519                  crypto_sign_ed25519_amd64_64_sc25519
5 #define shortsc25519             crypto_sign_ed25519_amd64_64_shortsc25519
6 #define sc25519_from32bytes      crypto_sign_ed25519_amd64_64_sc25519_from32bytes
7 #define shortsc25519_from16bytes crypto_sign_ed25519_amd64_64_shortsc25519_from16bytes
8 #define sc25519_from64bytes      crypto_sign_ed25519_amd64_64_sc25519_from64bytes
9 #define sc25519_from_shortsc     crypto_sign_ed25519_amd64_64_sc25519_from_shortsc
10 #define sc25519_to32bytes        crypto_sign_ed25519_amd64_64_sc25519_to32bytes
11 #define sc25519_iszero_vartime   crypto_sign_ed25519_amd64_64_sc25519_iszero_vartime
12 #define sc25519_isshort_vartime  crypto_sign_ed25519_amd64_64_sc25519_isshort_vartime
13 #define sc25519_lt               crypto_sign_ed25519_amd64_64_sc25519_lt
14 #define sc25519_add              crypto_sign_ed25519_amd64_64_sc25519_add
15 #define sc25519_sub_nored        crypto_sign_ed25519_amd64_64_sc25519_sub_nored
16 #define sc25519_mul              crypto_sign_ed25519_amd64_64_sc25519_mul
17 #define sc25519_mul_shortsc      crypto_sign_ed25519_amd64_64_sc25519_mul_shortsc
18 #define sc25519_window4          crypto_sign_ed25519_amd64_64_sc25519_window4
19 #define sc25519_slide          crypto_sign_ed25519_amd64_64_sc25519_slide
20 #define sc25519_2interleave2     crypto_sign_ed25519_amd64_64_sc25519_2interleave2
21 #define sc25519_barrett crypto_sign_ed25519_amd64_64_sc25519_barrett
22 
23 typedef struct
24 {
25   unsigned long long v[4];
26 }
27 sc25519;
28 
29 typedef struct
30 {
31   unsigned long long v[2];
32 }
33 shortsc25519;
34 
35 void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]);
36 
37 void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]);
38 
39 void sc25519_from_shortsc(sc25519 *r, const shortsc25519 *x);
40 
41 void sc25519_to32bytes(unsigned char r[32], const sc25519 *x);
42 
43 int sc25519_iszero_vartime(const sc25519 *x);
44 
45 int sc25519_lt(const sc25519 *x, const sc25519 *y);
46 
47 void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y);
48 
49 void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y);
50 
51 void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y);
52 
53 void sc25519_mul_shortsc(sc25519 *r, const sc25519 *x, const shortsc25519 *y);
54 
55 /* Convert s into a representation of the form \sum_{i=0}^{63}r[i]2^(4*i)
56  * with r[i] in {-8,...,7}
57  */
58 void sc25519_window4(signed char r[85], const sc25519 *s);
59 
60 void sc25519_slide(signed char r[256], const sc25519 *s, int swindowsize);
61 
62 void sc25519_2interleave2(unsigned char r[127], const sc25519 *s1, const sc25519 *s2);
63 
64 void sc25519_barrett(sc25519 *r, unsigned long long x[8]);
65 
66 #endif
67