debian man page for bn_dup

BN_copy(3SSL)							      OpenSSL							     BN_copy(3SSL)

NAME
       BN_copy, BN_dup - copy BIGNUMs

SYNOPSIS
	#include <openssl/bn.h>

	BIGNUM *BN_copy(BIGNUM *to, const BIGNUM *from);

	BIGNUM *BN_dup(const BIGNUM *from);

DESCRIPTION
       BN_copy() copies from to to. BN_dup() creates a new BIGNUM containing the value from.

RETURN VALUES
       BN_copy() returns to on success, NULL on error. BN_dup() returns the new BIGNUM, and NULL on error. The error codes can be obtained by
       ERR_get_error(3).

SEE ALSO
       bn(3), ERR_get_error(3)

HISTORY
       BN_copy() and BN_dup() are available in all versions of SSLeay and OpenSSL.

1.0.1e								    2013-02-11							     BN_copy(3SSL)