Provided by: libssl-doc_1.1.1-1ubuntu2.1~18.04.23_all bug

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 or 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 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>.

1.1.1                                              2023-05-24                               BN_MOD_INVERSE(3SSL)