1 /* 2 * Big number math 3 * Copyright (c) 2006, Jouni Malinen <j (at) w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #ifndef BIGNUM_H 16 #define BIGNUM_H 17 18 struct bignum; 19 20 struct bignum * bignum_init(void); 21 void bignum_deinit(struct bignum *n); 22 size_t bignum_get_unsigned_bin_len(struct bignum *n); 23 int bignum_get_unsigned_bin(const struct bignum *n, u8 *buf, size_t *len); 24 int bignum_set_unsigned_bin(struct bignum *n, const u8 *buf, size_t len); 25 int bignum_cmp(const struct bignum *a, const struct bignum *b); 26 int bignum_cmp_d(const struct bignum *a, unsigned long b); 27 int bignum_add(const struct bignum *a, const struct bignum *b, 28 struct bignum *c); 29 int bignum_sub(const struct bignum *a, const struct bignum *b, 30 struct bignum *c); 31 int bignum_mul(const struct bignum *a, const struct bignum *b, 32 struct bignum *c); 33 int bignum_mulmod(const struct bignum *a, const struct bignum *b, 34 const struct bignum *c, struct bignum *d); 35 int bignum_exptmod(const struct bignum *a, const struct bignum *b, 36 const struct bignum *c, struct bignum *d); 37 38 #endif /* BIGNUM_H */ 39
