1BN_MOD_INVERSE(3)                   OpenSSL                  BN_MOD_INVERSE(3)
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NAME

6       BN_mod_inverse - compute inverse modulo n
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SYNOPSIS

9        #include <openssl/bn.h>
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11        BIGNUM *BN_mod_inverse(BIGNUM *r, BIGNUM *a, const BIGNUM *n,
12                               BN_CTX *ctx);
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DESCRIPTION

15       BN_mod_inverse() computes the inverse of a modulo n places the result
16       in r ("(a*r)%n==1"). If r is NULL, a new BIGNUM is created.
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18       ctx is a previously allocated BN_CTX used for temporary variables. r
19       may be the same BIGNUM as a or n.
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RETURN VALUES

22       BN_mod_inverse() returns the BIGNUM containing the inverse, and NULL on
23       error. The error codes can be obtained by ERR_get_error(3).
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SEE ALSO

26       ERR_get_error(3), BN_add(3)
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29       Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
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31       Licensed under the OpenSSL license (the "License").  You may not use
32       this file except in compliance with the License.  You can obtain a copy
33       in the file LICENSE in the source distribution or at
34       <https://www.openssl.org/source/license.html>.
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381.1.1                             2018-09-11                 BN_MOD_INVERSE(3)
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