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 75