openssl/doc/crypto/BN_mod_inverse.pod

33 lines
711 B
Plaintext
Raw Normal View History

2000-01-24 06:06:24 +08:00
=pod
=head1 NAME
2000-02-24 19:55:57 +08:00
BN_mod_inverse - compute inverse modulo n
2000-01-24 06:06:24 +08:00
=head1 SYNOPSIS
#include <openssl/bn.h>
2000-02-24 19:55:57 +08:00
BIGNUM *BN_mod_inverse(BIGNUM *r, BIGNUM *a, const BIGNUM *n,
BN_CTX *ctx);
2000-01-24 06:06:24 +08:00
=head1 DESCRIPTION
BN_mod_inverse() computes the inverse of B<a> modulo B<n>
places the result in B<r> (C<(a*r)%n==1>). If B<r> is NULL,
a new B<BIGNUM> is created.
B<ctx> is a previously allocated B<BN_CTX> used for temporary
variables. B<r> may be the same B<BIGNUM> as B<a> or B<n>.
=head1 RETURN VALUES
BN_mod_inverse() returns the B<BIGNUM> containing the inverse, and
NULL on error. The error codes can be obtained by L<ERR_get_error(3)>.
2000-01-24 06:06:24 +08:00
=head1 SEE ALSO
L<bn(3)>, L<ERR_get_error(3)>, L<BN_add(3)>
2000-01-24 06:06:24 +08:00
=cut