- NAME
- SYNOPSIS
- DESCRIPTION
- RETURN VALUES
- SEE ALSO
- HISTORY

# 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.

# SEE ALSO

bn, ERR_get_error

# HISTORY

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