legalthings / data-enricher

     * 

     * @return string

     */

    function private_encrypt($data, $key, $passphrase = null, $padding = OPENSSL_PKCS1_PADDING)

    {

        $privKey = openssl_get_privatekey($key, $passphrase);

        if (!is_resource($privKey)) {

            $type = gettype($privKey);

            throw new \Exception("Expected private key to be resource, got: '$type'. Check if the given private key is in correct syntax.");

        }

        openssl_private_encrypt($data, $result, $privKey, $padding);

        if (!is_string($result)) {

            throw new \Exception("Failed to encrypt data. Result: '$result'");

        }

        $base64 = base64_encode($result);

        return $base64;

    }

    /**

     * Decrypts data with public key, that was encrypted with private key

     * 

     * @return string

     */

    function generate_signature($data, $key, $passphrase = null, $signature_alg = OPENSSL_ALGO_SHA1)

    {

        $privKey = openssl_get_privatekey($key, $passphrase);

        if (!is_resource($privKey)) {

            $type = gettype($privKey);

            throw new \Exception("Expected private key to be resource, got: '$type'. Check if the given private key is in correct syntax.");

        }

        openssl_sign($data, $result, $privKey, $signature_alg);

        if (!is_string($result)) {

            throw new \Exception("Failed to encrypt data. Result: '$result'");

        }

        $base64 = base64_encode($result);

        return $base64;

    }

    /**

     * Verify signature that was encrypted with private key through public key