BN_MOD_INVERSE
Section: OpenSSL (3SSL)
Updated: 2024-03-03
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NAME
BN_mod_inverse - compute inverse modulo n
SYNOPSIS
#include <openssl/bn.h>
BIGNUM *BN_mod_inverse(BIGNUM *r, BIGNUM *a, const BIGNUM *n,
BN_CTX *ctx);
DESCRIPTION
BN_mod_inverse() computes the inverse of a modulo n
places the result in r ("(a*r)%n==1"). If r is NULL,
a new BIGNUM is created.
ctx is a previously allocated BN_CTX used for temporary
variables. r may be the same BIGNUM as a.
NOTES
It is an error to use the same BIGNUM as n.
RETURN VALUES
BN_mod_inverse() returns the BIGNUM containing the inverse, and
NULL on error. The error codes can be obtained by ERR_get_error(3).
SEE ALSO
ERR_get_error(3), BN_add(3)
COPYRIGHT
Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (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>.
Index
- NAME
-
- SYNOPSIS
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- DESCRIPTION
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- NOTES
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- RETURN VALUES
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- SEE ALSO
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- COPYRIGHT
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