<?php

function my_custom_gravityforms_encrypt( $to_encrypt )
{
	if ( '' === $to_encrypt ) return null;

	if ( function_exists('openssl_encrypt') && function_exists('openssl_random_pseudo_bytes') )
	{
		$iv = openssl_random_pseudo_bytes( openssl_cipher_iv_length( 'aes-256-cbc' ) );
		$encrypted = openssl_encrypt( $to_encrypt, 'aes-256-cbc', MY_CUSTOM_GF_ENCRYPTION_KEY, 0, $iv );

		return base64_encode( $encrypted . '::' . $iv );
	}

	return base64_encode( $to_encrypt );
} // end my_custom_gravityforms_encrypt



function my_custom_gravityforms_decrypt( $to_decrypt )
{
	if ( '' === $to_decrypt ) return null;

	if ( function_exists('openssl_decrypt') )
	{
		@list( $encrypted_data, $iv ) = explode( '::', base64_decode( $to_decrypt ), 2 );

    	return openssl_decrypt( $encrypted_data, 'aes-256-cbc', MY_CUSTOM_GF_ENCRYPTION_KEY, 0, $iv );
    }

    return base64_decode( $to_decrypt );
} // end my_custom_gravityforms_decrypt