89 lines
2.9 KiB
PHP
89 lines
2.9 KiB
PHP
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<?php
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/*
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* Copyright 2011 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* Signs data.
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*
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* Only used for testing.
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*
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* @author Brian Eaton <beaton@google.com>
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*/
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class W3TCG_Google_Signer_P12 extends W3TCG_Google_Signer_Abstract
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{
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// OpenSSL private key resource
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private $privateKey;
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// Creates a new signer from a .p12 file.
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public function __construct($p12, $password)
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{
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if (!function_exists('openssl_x509_read')) {
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throw new W3TCG_Google_Exception(
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'The Google PHP API library needs the openssl PHP extension'
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);
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}
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// If the private key is provided directly, then this isn't in the p12
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// format. Different versions of openssl support different p12 formats
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// and the key from google wasn't being accepted by the version available
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// at the time.
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if (!$password && strpos($p12, "-----BEGIN RSA PRIVATE KEY-----") !== false) {
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$this->privateKey = openssl_pkey_get_private($p12);
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} else {
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// This throws on error
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$certs = array();
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if (!openssl_pkcs12_read($p12, $certs, $password)) {
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throw new W3TCG_Google_Auth_Exception(
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"Unable to parse the p12 file. " .
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"Is this a .p12 file? Is the password correct? OpenSSL error: " .
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openssl_error_string()
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);
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}
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// TODO(beaton): is this part of the contract for the openssl_pkcs12_read
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// method? What happens if there are multiple private keys? Do we care?
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if (!array_key_exists("pkey", $certs) || !$certs["pkey"]) {
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throw new W3TCG_Google_Auth_Exception("No private key found in p12 file.");
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}
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$this->privateKey = openssl_pkey_get_private($certs['pkey']);
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}
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if (!$this->privateKey) {
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throw new W3TCG_Google_Auth_Exception("Unable to load private key");
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}
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}
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public function __destruct()
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{
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if ($this->privateKey) {
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openssl_pkey_free($this->privateKey);
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}
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}
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public function sign($data)
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{
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if (version_compare(PHP_VERSION, '5.3.0') < 0) {
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throw new W3TCG_Google_Auth_Exception(
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"PHP 5.3.0 or higher is required to use service accounts."
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);
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}
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$hash = defined("OPENSSL_ALGO_SHA256") ? OPENSSL_ALGO_SHA256 : "sha256";
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if (!openssl_sign($data, $signature, $this->privateKey, $hash)) {
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throw new W3TCG_Google_Auth_Exception("Unable to sign data");
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}
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return $signature;
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}
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}
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