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• NAME
• SYNOPSIS
• DESCRIPTION
• RETURN VALUES
• WARNING
• SEE ALSO
• HISTORY
• COPYRIGHT

NAME

BN_mod_mul_montgomery, BN_MONT_CTX_new, BN_MONT_CTX_free, BN_MONT_CTX_set, BN_MONT_CTX_copy, BN_from_montgomery, BN_to_montgomery - Montgomery multiplication

SYNOPSIS

#include <openssl/bn.h>

BN_MONT_CTX *BN_MONT_CTX_new(void);
void BN_MONT_CTX_free(BN_MONT_CTX *mont);

int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *m, BN_CTX *ctx);
BN_MONT_CTX *BN_MONT_CTX_copy(BN_MONT_CTX *to, BN_MONT_CTX *from);

int BN_mod_mul_montgomery(BIGNUM *r, BIGNUM *a, BIGNUM *b,
        BN_MONT_CTX *mont, BN_CTX *ctx);

int BN_from_montgomery(BIGNUM *r, BIGNUM *a, BN_MONT_CTX *mont,
        BN_CTX *ctx);

int BN_to_montgomery(BIGNUM *r, BIGNUM *a, BN_MONT_CTX *mont,
        BN_CTX *ctx);

DESCRIPTION

These functions implement Montgomery multiplication. They are used automatically when RETURN VALUES

BN_MONT_CTX_new() returns the newly allocated BN_MONT_CTX, and NULL on error.

For the other functions, 1 is returned for success, 0 on error. The error codes can be obtained by WARNING

The inputs must be reduced modulo m, otherwise the result will be outside the expected range.

BN_add(3), HISTORY

BN_MONT_CTX_init() was removed in OpenSSL 1.1.0

Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at https://www.openssl.org/source/license.html.