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 #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 32 typedef struct 33 { 34 crypto_uint32 v[32]; 35 } 36 sc25519; 37 38 typedef struct 39 { 40 crypto_uint32 v[16]; 41 } 42 shortsc25519; 43 44 void sc25519_from32bytes(sc25519 *r, const unsigned char x[32]); 45 46 void shortsc25519_from16bytes(shortsc25519 *r, const unsigned char x[16]); 47 48 void sc25519_from64bytes(sc25519 *r, const unsigned char x[64]); 49 50 void sc25519_from_shortsc(sc25519 *r, const shortsc25519 *x); 51 52 void sc25519_to32bytes(unsigned char r[32], const sc25519 *x); 53 54 int sc25519_iszero_vartime(const sc25519 *x); 55 56 int sc25519_isshort_vartime(const sc25519 *x); 57 58 int sc25519_lt_vartime(const sc25519 *x, const sc25519 *y); 59 60 void sc25519_add(sc25519 *r, const sc25519 *x, const sc25519 *y); 61 62 void sc25519_sub_nored(sc25519 *r, const sc25519 *x, const sc25519 *y); 63 64 void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y); 65 66 void 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 */ 71 void 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 */ 76 void sc25519_window5(signed char r[51], const sc25519 *s); 77 78 void sc25519_2interleave2(unsigned char r[127], const sc25519 *s1, const sc25519 *s2); 79 80 #endif 81