forked from GNUsocial/gnu-social
225 lines
6.0 KiB
PHP
225 lines
6.0 KiB
PHP
<?php
|
|
/**
|
|
* StatusNet - the distributed open-source microblogging tool
|
|
* Copyright (C) 2010, StatusNet, Inc.
|
|
*
|
|
* A sample module to show best practices for StatusNet plugins
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* @package StatusNet
|
|
* @author James Walker <james@status.net>
|
|
* @copyright 2010 StatusNet, Inc.
|
|
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
|
|
* @link http://status.net/
|
|
*/
|
|
|
|
require_once 'Crypt/RSA.php';
|
|
|
|
class Magicsig extends Memcached_DataObject
|
|
{
|
|
|
|
const PUBLICKEYREL = 'magic-public-key';
|
|
|
|
public $__table = 'magicsig';
|
|
|
|
public $user_id;
|
|
public $keypair;
|
|
public $alg;
|
|
|
|
private $_rsa;
|
|
|
|
public function __construct($alg = 'RSA-SHA256')
|
|
{
|
|
$this->alg = $alg;
|
|
}
|
|
|
|
public /*static*/ function staticGet($k, $v=null)
|
|
{
|
|
$obj = parent::staticGet(__CLASS__, $k, $v);
|
|
return Magicsig::fromString($obj->keypair);
|
|
}
|
|
|
|
|
|
function table()
|
|
{
|
|
return array(
|
|
'user_id' => DB_DATAOBJECT_INT,
|
|
'keypair' => DB_DATAOBJECT_STR + DB_DATAOBJECT_NOTNULL,
|
|
'alg' => DB_DATAOBJECT_STR
|
|
);
|
|
}
|
|
|
|
static function schemaDef()
|
|
{
|
|
return array(new ColumnDef('user_id', 'integer',
|
|
null, true, 'PRI'),
|
|
new ColumnDef('keypair', 'varchar',
|
|
255, false),
|
|
new ColumnDef('alg', 'varchar',
|
|
64, false));
|
|
}
|
|
|
|
|
|
function keys()
|
|
{
|
|
return array_keys($this->keyTypes());
|
|
}
|
|
|
|
function keyTypes()
|
|
{
|
|
return array('user_id' => 'K');
|
|
}
|
|
|
|
function sequenceKey() {
|
|
return array(false, false, false);
|
|
}
|
|
|
|
function insert()
|
|
{
|
|
$this->keypair = $this->toString();
|
|
|
|
return parent::insert();
|
|
}
|
|
|
|
public function generate($user_id, $key_length = 512)
|
|
{
|
|
PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
|
|
|
|
$keypair = new Crypt_RSA_KeyPair($key_length);
|
|
$params['public_key'] = $keypair->getPublicKey();
|
|
$params['private_key'] = $keypair->getPrivateKey();
|
|
|
|
$this->_rsa = new Crypt_RSA($params);
|
|
PEAR::popErrorHandling();
|
|
|
|
$this->user_id = $user_id;
|
|
$this->insert();
|
|
}
|
|
|
|
|
|
public function toString($full_pair = true)
|
|
{
|
|
$public_key = $this->_rsa->_public_key;
|
|
$private_key = $this->_rsa->_private_key;
|
|
|
|
$mod = base64_url_encode($public_key->getModulus());
|
|
$exp = base64_url_encode($public_key->getExponent());
|
|
$private_exp = '';
|
|
if ($full_pair && $private_key->getExponent()) {
|
|
$private_exp = '.' . base64_url_encode($private_key->getExponent());
|
|
}
|
|
|
|
return 'RSA.' . $mod . '.' . $exp . $private_exp;
|
|
}
|
|
|
|
public static function fromString($text)
|
|
{
|
|
PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
|
|
|
|
$magic_sig = new Magicsig();
|
|
|
|
// remove whitespace
|
|
$text = preg_replace('/\s+/', '', $text);
|
|
|
|
// parse components
|
|
if (!preg_match('/RSA\.([^\.]+)\.([^\.]+)(.([^\.]+))?/', $text, $matches)) {
|
|
return false;
|
|
}
|
|
|
|
$mod = base64_url_decode($matches[1]);
|
|
$exp = base64_url_decode($matches[2]);
|
|
if ($matches[4]) {
|
|
$private_exp = base64_url_decode($matches[4]);
|
|
}
|
|
|
|
$params['public_key'] = new Crypt_RSA_KEY($mod, $exp, 'public');
|
|
if ($params['public_key']->isError()) {
|
|
$error = $params['public_key']->getLastError();
|
|
common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
|
|
return false;
|
|
}
|
|
if ($private_exp) {
|
|
$params['private_key'] = new Crypt_RSA_KEY($mod, $private_exp, 'private');
|
|
if ($params['private_key']->isError()) {
|
|
$error = $params['private_key']->getLastError();
|
|
common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
|
|
return false;
|
|
}
|
|
}
|
|
|
|
$magic_sig->_rsa = new Crypt_RSA($params);
|
|
PEAR::popErrorHandling();
|
|
|
|
return $magic_sig;
|
|
}
|
|
|
|
public function getName()
|
|
{
|
|
return $this->alg;
|
|
}
|
|
|
|
public function getHash()
|
|
{
|
|
switch ($this->alg) {
|
|
|
|
case 'RSA-SHA256':
|
|
return 'sha256';
|
|
}
|
|
|
|
}
|
|
|
|
public function sign($bytes)
|
|
{
|
|
$sig = $this->_rsa->createSign($bytes, null, 'sha256');
|
|
if ($this->_rsa->isError()) {
|
|
$error = $this->_rsa->getLastError();
|
|
common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
|
|
return false;
|
|
}
|
|
|
|
return $sig;
|
|
}
|
|
|
|
public function verify($signed_bytes, $signature)
|
|
{
|
|
$result = $this->_rsa->validateSign($signed_bytes, $signature, null, 'sha256');
|
|
if ($this->_rsa->isError()) {
|
|
$error = $this->keypair->getLastError();
|
|
common_log(LOG_DEBUG, 'RSA Error: '. $error->getMessage());
|
|
return false;
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
}
|
|
|
|
// Define a sha256 function for hashing
|
|
// (Crypt_RSA should really be updated to use hash() )
|
|
function sha256($bytes)
|
|
{
|
|
return hash('sha256', $bytes);
|
|
}
|
|
|
|
function base64_url_encode($input)
|
|
{
|
|
return strtr(base64_encode($input), '+/', '-_');
|
|
}
|
|
|
|
function base64_url_decode($input)
|
|
{
|
|
return base64_decode(strtr($input, '-_', '+/'));
|
|
} |