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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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require_once $GLOBALS['iwp_mmb_plugin_dir'].'/lib/Google/Auth/Exception.php'; |
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require_once $GLOBALS['iwp_mmb_plugin_dir'].'/lib/Google/Signer/Abstract.php'; |
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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 IWP_google_Signer_P12 extends IWP_google_Signer_Abstract |
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{ |
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// OpenSSL private key resource |
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private $privateKey; |
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|
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// Creates a new signer from a .p12 file. |
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public function __construct($p12, $password) |
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{ |
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if (!function_exists('openssl_x509_read')) { |
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throw new IWP_google_Exception( |
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'The Google PHP API library needs the openssl PHP extension' |
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); |
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} |
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|
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// If the private key is provided directly, then this isn't in the p12 |
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// format. Different versions of openssl support different p12 formats |
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// and the key from google wasn't being accepted by the version available |
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// at the time. |
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if (!$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 IWP_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 IWP_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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|
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if (!$this->privateKey) { |
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throw new IWP_google_Auth_Exception("Unable to load private key"); |
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} |
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} |
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|
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public function __destruct() |
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{ |
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if ($this->privateKey) { |
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openssl_pkey_free($this->privateKey); |
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} |
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} |
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|
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public function sign($data) |
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{ |
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if (version_compare(PHP_VERSION, '5.3.0') < 0) { |
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throw new IWP_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 IWP_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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|
