- NAME
- SYNOPSIS
- DESCRIPTION
- RETURN VALUES
- SEE ALSO
- HISTORY
- COPYRIGHT

# NAME

BN_mod_mul_reciprocal, BN_div_recp, BN_RECP_CTX_new, BN_RECP_CTX_free, BN_RECP_CTX_set - modular multiplication using reciprocal

# SYNOPSIS

     #include <openssl/bn.h>

     BN_RECP_CTX *BN_RECP_CTX_new(void);
     void BN_RECP_CTX_free(BN_RECP_CTX *recp);

     int BN_RECP_CTX_set(BN_RECP_CTX *recp, const BIGNUM *m, BN_CTX *ctx);

     int BN_div_recp(BIGNUM *dv, BIGNUM *rem, BIGNUM *a, BN_RECP_CTX *recp,
            BN_CTX *ctx);

     int BN_mod_mul_reciprocal(BIGNUM *r, BIGNUM *a, BIGNUM *b,
            BN_RECP_CTX *recp, BN_CTX *ctx);

# DESCRIPTION

BN_mod_mul_reciprocal() can be used to perform an efficient RETURN VALUES

BN_RECP_CTX_new() returns the newly allocated BN_RECP_CTX, and NULL on error.

BN_RECP_CTX_free() has no return value.

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

ERR_get_error(3), BN_CTX_new(3)

# HISTORY

BN_RECP_CTX_init() was removed in OpenSSL 1.1.0

# COPYRIGHT

Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.

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.