1 /* 2 * Big number math 3 * Copyright (c) 2006, Jouni Malinen <j (at) w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #ifndef BIGNUM_H 10 #define BIGNUM_H 11 12 struct bignum; 13 14 struct bignum * bignum_init(void); 15 void bignum_deinit(struct bignum *n); 16 size_t bignum_get_unsigned_bin_len(struct bignum *n); 17 int bignum_get_unsigned_bin(const struct bignum *n, u8 *buf, size_t *len); 18 int bignum_set_unsigned_bin(struct bignum *n, const u8 *buf, size_t len); 19 int bignum_cmp(const struct bignum *a, const struct bignum *b); 20 int bignum_cmp_d(const struct bignum *a, unsigned long b); 21 int bignum_add(const struct bignum *a, const struct bignum *b, 22 struct bignum *c); 23 int bignum_sub(const struct bignum *a, const struct bignum *b, 24 struct bignum *c); 25 int bignum_mul(const struct bignum *a, const struct bignum *b, 26 struct bignum *c); 27 int bignum_mulmod(const struct bignum *a, const struct bignum *b, 28 const struct bignum *c, struct bignum *d); 29 int bignum_exptmod(const struct bignum *a, const struct bignum *b, 30 const struct bignum *c, struct bignum *d); 31 32 #endif /* BIGNUM_H */ 33
