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.