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Last change
on this file since 83531 was 83531, checked in by vboxsync, 5 years ago |
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setting svn:sync-process=export for openssl-1.1.1f, all files except tests
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| 1 | =pod
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| 2 |
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| 3 | =head1 NAME
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| 4 |
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| 5 | BN_mod_inverse - compute inverse modulo n
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| 6 |
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| 7 | =head1 SYNOPSIS
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| 8 |
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| 9 | #include <openssl/bn.h>
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| 10 |
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| 11 | BIGNUM *BN_mod_inverse(BIGNUM *r, BIGNUM *a, const BIGNUM *n,
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| 12 | BN_CTX *ctx);
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| 13 |
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| 14 | =head1 DESCRIPTION
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| 15 |
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| 16 | BN_mod_inverse() computes the inverse of B<a> modulo B<n>
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| 17 | places the result in B<r> (C<(a*r)%n==1>). If B<r> is NULL,
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| 18 | a new B<BIGNUM> is created.
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| 19 |
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| 20 | B<ctx> is a previously allocated B<BN_CTX> used for temporary
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| 21 | variables. B<r> may be the same B<BIGNUM> as B<a> or B<n>.
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| 22 |
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| 23 | =head1 RETURN VALUES
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| 24 |
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| 25 | BN_mod_inverse() returns the B<BIGNUM> containing the inverse, and
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| 26 | NULL on error. The error codes can be obtained by L<ERR_get_error(3)>.
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| 27 |
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| 28 | =head1 SEE ALSO
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| 29 |
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| 30 | L<ERR_get_error(3)>, L<BN_add(3)>
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| 31 |
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| 32 | =head1 COPYRIGHT
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| 33 |
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| 34 | Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
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| 35 |
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| 36 | Licensed under the OpenSSL license (the "License"). You may not use
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| 37 | this file except in compliance with the License. You can obtain a copy
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| 38 | in the file LICENSE in the source distribution or at
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| 39 | L<https://www.openssl.org/source/license.html>.
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| 40 |
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| 41 | =cut
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