SilcBool silc_load_key_pair(const char *pub_filename,
                                const char *prv_filename,
                                const char *passphrase,
                                SilcPublicKey *return_public_key,
                                SilcPrivateKey *return_private_key);

    This routine can be used to load the public key and private key
    from files.  This retuns FALSE it either of the key could not be
    loaded.  This function returns TRUE on success and returns the
    public key into `return_public_key' pointer and private key into
    `return_private_key'.  The `passphrase' is the passphrase which
    will be used to decrypt the private key file.