contrib/wpa_supplicant-0.5.8/bignum.h

   1 /*
   2  * Big number math
   3  * Copyright (c) 2006, Jouni Malinen <j@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 */