3 * StatusNet - the distributed open-source microblogging tool
4 * Copyright (C) 2010, StatusNet, Inc.
6 * A sample module to show best practices for StatusNet plugins
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU Affero General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Affero General Public License for more details.
20 * You should have received a copy of the GNU Affero General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * @author James Walker <james@status.net>
25 * @copyright 2010 StatusNet, Inc.
26 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
27 * @link http://status.net/
30 require_once 'Crypt/RSA.php';
32 class Magicsig extends Memcached_DataObject
35 const PUBLICKEYREL = 'magic-public-key';
37 public $__table = 'magicsig';
45 public function __construct($alg = 'RSA-SHA256')
50 public /*static*/ function staticGet($k, $v=null)
52 return parent::staticGet(__CLASS__, $k, $v);
59 'user_id' => DB_DATAOBJECT_INT,
60 'keypair' => DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
61 'alg' => DB_DATAOBJECT_STR
65 static function schemaDef()
67 return array(new ColumnDef('user_id', 'integer',
69 new ColumnDef('keypair', 'varchar',
71 new ColumnDef('alg', 'varchar',
78 return array_keys($this->keyTypes());
83 return array('user_id' => 'K');
88 $this->keypair = $this->toString();
90 return parent::insert();
93 public function generate($key_length = 512)
95 PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
97 $keypair = new Crypt_RSA_KeyPair($key_length);
98 $params['public_key'] = $keypair->getPublicKey();
99 $params['private_key'] = $keypair->getPrivateKey();
101 $this->_rsa = new Crypt_RSA($params);
102 PEAR::popErrorHandling();
108 public function toString($full_pair = true)
110 $public_key = $this->_rsa->_public_key;
111 $private_key = $this->_rsa->_private_key;
113 $mod = base64_url_encode($public_key->getModulus());
114 $exp = base64_url_encode($public_key->getExponent());
116 if ($full_pair && $private_key->getExponent()) {
117 $private_exp = '.' . base64_url_encode($private_key->getExponent());
120 return 'RSA.' . $mod . '.' . $exp . $private_exp;
123 public static function fromString($text)
125 PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
127 $magic_sig = new Magicsig();
130 $text = preg_replace('/\s+/', '', $text);
133 if (!preg_match('/RSA\.([^\.]+)\.([^\.]+)(.([^\.]+))?/', $text, $matches)) {
137 $mod = base64_url_decode($matches[1]);
138 $exp = base64_url_decode($matches[2]);
140 $private_exp = base64_url_decode($matches[4]);
143 $params['public_key'] = new Crypt_RSA_KEY($mod, $exp, 'public');
144 if ($params['public_key']->isError()) {
145 $error = $params['public_key']->getLastError();
146 common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
150 $params['private_key'] = new Crypt_RSA_KEY($mod, $private_exp, 'private');
151 if ($params['private_key']->isError()) {
152 $error = $params['private_key']->getLastError();
153 common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
158 $magic_sig->_rsa = new Crypt_RSA($params);
159 PEAR::popErrorHandling();
164 public function getName()
169 public function getHash()
171 switch ($this->alg) {
179 public function sign($bytes)
181 $sig = $this->_rsa->createSign($bytes, null, 'sha256');
182 if ($this->_rsa->isError()) {
183 $error = $this->_rsa->getLastError();
184 common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
191 public function verify($signed_bytes, $signature)
193 $result = $this->_rsa->validateSign($signed_bytes, $signature, null, 'sha256');
194 if ($this->_rsa->isError()) {
195 $error = $this->keypair->getLastError();
196 common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
204 // Define a sha256 function for hashing
205 // (Crypt_RSA should really be updated to use hash() )
206 function sha256($bytes)
208 return hash('sha256', $bytes);
211 function base64_url_encode($input)
213 return strtr(base64_encode($input), '+/', '-_');
216 function base64_url_decode($input)
218 return base64_decode(strtr($input, '-_', '+/'));