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/*
*
* bn_mont2.h
*
* Montgomery Modular Arithmetic Functions.
*
* Copyright (C) Lenka Fibikova 2000
*
*
*/
#ifndef HEADER_MONT2_H
#define HEADER_MONT2_H
#define MONTGOMERY
#include <openssl/bn.h>
typedef struct bn_mont_st{
int R_num_bits;
int p_num_bytes;
BIGNUM *p;
BN_ULONG p_inv_b_neg; /* p' = p^{-1} mod b; b = 2^BN_BITS */
} BN_MONTGOMERY;
#define BN_from_mont(x, mont, ctx) (BN_mont_red((x), (mont), (ctx)))
BN_MONTGOMERY *BN_mont_new();
int BN_to_mont(BIGNUM *x, BN_MONTGOMERY *mont, BN_CTX *ctx);
void BN_mont_clear_free(BN_MONTGOMERY *mont);
int BN_mont_set(BIGNUM *p, BN_MONTGOMERY *mont, BN_CTX *ctx);
int BN_mont_red(BIGNUM *y, BN_MONTGOMERY *mont, BN_CTX *ctx);
BN_ULONG BN_mont_inv(BIGNUM *x, int e, BN_CTX *ctx);
#endif
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