=pod =head1 NAME BN_copy, BN_dup - copy BIGNUMs =head1 SYNOPSIS #include <openssl/bn.h> BIGNUM *BN_copy(BIGNUM *to, const BIGNUM *from); BIGNUM *BN_dup(const BIGNUM *from); =head1 DESCRIPTION BN_copy() copies B<from> to B<to>. BN_dup() creates a new B<BIGNUM> containing the value B<from>. =head1 RETURN VALUES BN_copy() returns B<to> on success, NULL on error. BN_dup() returns the new B<BIGNUM>, and NULL on error. The error codes can be obtained by L<ERR_get_error(3)|ERR_get_error(3)>. =head1 SEE ALSO L<bn(3)|bn(3)>, L<ERR_get_error(3)|ERR_get_error(3)> =head1 HISTORY BN_copy() and BN_dup() are available in all versions of SSLeay and OpenSSL. =cut