BN_mod_inverse
Section: OpenSSL (3SSL)
Updated: 2016-05-03
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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 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
bn(3),
ERR_get_error(3),
BN_add(3)
HISTORY
BN_mod_inverse() is available in all versions of SSLeay and OpenSSL.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUES
-
- SEE ALSO
-
- HISTORY
-