1 #ifndef FE_H 2 #define FE_H 3 4 #include "crypto_int32.h" 5 6 typedef crypto_int32 fe[10]; 7 8 /* 9 fe means field element. 10 Here the field is \Z/(2^255-19). 11 An element t, entries t[0]...t[9], represents the integer 12 t[0]+2^26 t[1]+2^51 t[2]+2^77 t[3]+2^102 t[4]+...+2^230 t[9]. 13 Bounds on each t[i] vary depending on context. 14 */ 15 16 #define fe_frombytes cjdns_fe_frombytes 17 #define fe_tobytes cjdns_fe_tobytes 18 #define fe_copy cjdns_fe_copy 19 #define fe_isnonzero cjdns_fe_isnonzero 20 #define fe_isnegative cjdns_fe_isnegative 21 #define fe_0 cjdns_fe_0 22 #define fe_1 cjdns_fe_1 23 #define fe_cswap cjdns_fe_cswap 24 #define fe_cmov cjdns_fe_cmov 25 #define fe_add cjdns_fe_add 26 #define fe_sub cjdns_fe_sub 27 #define fe_neg cjdns_fe_neg 28 #define fe_mul cjdns_fe_mul 29 #define fe_sq cjdns_fe_sq 30 #define fe_sq2 cjdns_fe_sq2 31 #define fe_mul121666 cjdns_fe_mul121666 32 #define fe_invert cjdns_fe_invert 33 #define fe_pow22523 cjdns_fe_pow22523 34 35 extern void fe_frombytes(fe,const unsigned char *); 36 extern void fe_tobytes(unsigned char *,const fe); 37 38 extern void fe_copy(fe,const fe); 39 extern int fe_isnonzero(const fe); 40 extern int fe_isnegative(const fe); 41 extern void fe_0(fe); 42 extern void fe_1(fe); 43 extern void fe_cswap(fe,fe,unsigned int); 44 extern void fe_cmov(fe,const fe,unsigned int); 45 46 extern void fe_add(fe,const fe,const fe); 47 extern void fe_sub(fe,const fe,const fe); 48 extern void fe_neg(fe,const fe); 49 extern void fe_mul(fe,const fe,const fe); 50 extern void fe_sq(fe,const fe); 51 extern void fe_sq2(fe,const fe); 52 extern void fe_mul121666(fe,const fe); 53 extern void fe_invert(fe,const fe); 54 extern void fe_pow22523(fe,const fe); 55 56 #endif 57