removing deprecated PEAR Crypt_RSA

8 files changed, 0 insertions, 3168 deletions

diff --git a/plugins/OStatus/extlib/Crypt/RSA.php b/plugins/OStatus/extlib/Crypt/RSA.php
deleted file mode 100644
index 16dfa54d4..000000000
--- a/plugins/OStatus/extlib/Crypt/RSA.php
+++ /dev/null
@@ -1,524 +0,0 @@
-<?php
-/**
- * Crypt_RSA allows to do following operations:
- *     - key pair generation
- *     - encryption and decryption
- *     - signing and sign validation
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category   Encryption
- * @package    Crypt_RSA
- * @author     Alexander Valyalkin <valyala@gmail.com>
- * @copyright  2005, 2006 Alexander Valyalkin
- * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version    1.2.0b
- * @link       http://pear.php.net/package/Crypt_RSA
- */
-
-/**
- * RSA error handling facilities
- */
-require_once 'Crypt/RSA/ErrorHandler.php';
-
-/**
- * loader for math wrappers
- */
-require_once 'Crypt/RSA/MathLoader.php';
-
-/**
- * helper class for mange single key
- */
-require_once 'Crypt/RSA/Key.php';
-
-/**
- * helper class for manage key pair
- */
-require_once 'Crypt/RSA/KeyPair.php';
-
-/**
- * Crypt_RSA class, derived from Crypt_RSA_ErrorHandler
- *
- * Provides the following functions:
- *  - setParams($params) - sets parameters of current object
- *  - encrypt($plain_data, $key = null) - encrypts data
- *  - decrypt($enc_data, $key = null) - decrypts data
- *  - createSign($doc, $private_key = null) - signs document by private key
- *  - validateSign($doc, $signature, $public_key = null) - validates signature of document
- *
- * Example usage:
- *     // creating an error handler
- *     $error_handler = create_function('$obj', 'echo "error: ", $obj->getMessage(), "\n"');
- *
- *     // 1024-bit key pair generation
- *     $key_pair = new Crypt_RSA_KeyPair(1024);
- *
- *     // check consistence of Crypt_RSA_KeyPair object
- *     $error_handler($key_pair);
- *
- *     // creating Crypt_RSA object
- *     $rsa_obj = new Crypt_RSA;
- *
- *     // check consistence of Crypt_RSA object
- *     $error_handler($rsa_obj);
- *
- *     // set error handler on Crypt_RSA object ( see Crypt/RSA/ErrorHandler.php for details )
- *     $rsa_obj->setErrorHandler($error_handler);
- *
- *     // encryption (usually using public key)
- *     $enc_data = $rsa_obj->encrypt($plain_data, $key_pair->getPublicKey());
- *
- *     // decryption (usually using private key)
- *     $plain_data = $rsa_obj->decrypt($enc_data, $key_pair->getPrivateKey());
- *
- *     // signing
- *     $signature = $rsa_obj->createSign($document, $key_pair->getPrivateKey());
- *
- *     // signature checking
- *     $is_valid = $rsa_obj->validateSign($document, $signature, $key_pair->getPublicKey());
- *
- *     // signing many documents by one private key
- *     $rsa_obj = new Crypt_RSA(array('private_key' => $key_pair->getPrivateKey()));
- *     // check consistence of Crypt_RSA object
- *     $error_handler($rsa_obj);
- *     // set error handler ( see Crypt/RSA/ErrorHandler.php for details )
- *     $rsa_obj->setErrorHandler($error_handler);
- *     // sign many documents
- *     $sign_1 = $rsa_obj->sign($doc_1);
- *     $sign_2 = $rsa_obj->sign($doc_2);
- *     //...
- *     $sign_n = $rsa_obj->sign($doc_n);
- *
- *     // changing default hash function, which is used for sign
- *     // creating/validation
- *     $rsa_obj->setParams(array('hash_func' => 'md5'));
- *
- *     // using factory() method instead of constructor (it returns PEAR_Error object on failure)
- *     $rsa_obj = &Crypt_RSA::factory();
- *     if (PEAR::isError($rsa_obj)) {
- *         echo "error: ", $rsa_obj->getMessage(), "\n";
- *     }
- *
- * @category   Encryption
- * @package    Crypt_RSA
- * @author     Alexander Valyalkin <valyala@gmail.com>
- * @copyright  2005, 2006 Alexander Valyalkin
- * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
- * @link       http://pear.php.net/package/Crypt_RSA
- * @version    @package_version@
- * @access     public
- */
-class Crypt_RSA extends Crypt_RSA_ErrorHandler
-{
-    /**
-     * Reference to math wrapper, which is used to
-     * manipulate large integers in RSA algorithm.
-     *
-     * @var object of Crypt_RSA_Math_* class
-     * @access private
-     */
-    var $_math_obj;
-
-    /**
-     * key for encryption, which is used by encrypt() method
-     *
-     * @var object of Crypt_RSA_KEY class
-     * @access private
-     */
-    var $_enc_key;
-
-    /**
-     * key for decryption, which is used by decrypt() method
-     *
-     * @var object of Crypt_RSA_KEY class
-     * @access private
-     */
-    var $_dec_key;
-
-    /**
-     * public key, which is used by validateSign() method
-     *
-     * @var object of Crypt_RSA_KEY class
-     * @access private
-     */
-    var $_public_key;
-
-    /**
-     * private key, which is used by createSign() method
-     *
-     * @var object of Crypt_RSA_KEY class
-     * @access private
-     */
-    var $_private_key;
-
-    /**
-     * name of hash function, which is used by validateSign()
-     * and createSign() methods. Default hash function is SHA-1
-     *
-     * @var string
-     * @access private
-     */
-    var $_hash_func = 'sha1';
-
-    /**
-     * Crypt_RSA constructor.
-     *
-     * @param array $params
-     *        Optional associative array of parameters, such as:
-     *        enc_key, dec_key, private_key, public_key, hash_func.
-     *        See setParams() method for more detailed description of
-     *        these parameters.
-     * @param string $wrapper_name
-     *        Name of math wrapper, which will be used to
-     *        perform different operations with big integers.
-     *        See contents of Crypt/RSA/Math folder for examples of wrappers.
-     *        Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
-     * @param string $error_handler   name of error handler function
-     *
-     * @access public
-     */
-    function Crypt_RSA($params = null, $wrapper_name = 'default', $error_handler = '')
-    {
-        // set error handler
-        $this->setErrorHandler($error_handler);
-        // try to load math wrapper
-        $obj = &Crypt_RSA_MathLoader::loadWrapper($wrapper_name);
-        if ($this->isError($obj)) {
-            // error during loading of math wrapper
-            // Crypt_RSA object is partially constructed.
-            $this->pushError($obj);
-            return;
-        }
-        $this->_math_obj = &$obj;
-
-        if (!is_null($params)) {
-            if (!$this->setParams($params)) {
-                // error in Crypt_RSA::setParams() function
-                return;
-            }
-        }
-    }
-
-    /**
-     * Crypt_RSA factory.
-     *
-     * @param array $params
-     *        Optional associative array of parameters, such as:
-     *        enc_key, dec_key, private_key, public_key, hash_func.
-     *        See setParams() method for more detailed description of
-     *        these parameters.
-     * @param string $wrapper_name
-     *        Name of math wrapper, which will be used to
-     *        perform different operations with big integers.
-     *        See contents of Crypt/RSA/Math folder for examples of wrappers.
-     *        Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
-     * @param string $error_handler   name of error handler function
-     *
-     * @return object  new Crypt_RSA object on success or PEAR_Error object on failure
-     * @access public
-     */
-    function &factory($params = null, $wrapper_name = 'default', $error_handler = '')
-    {
-        $obj = &new Crypt_RSA($params, $wrapper_name, $error_handler);
-        if ($obj->isError()) {
-            // error during creating a new object. Retrurn PEAR_Error object
-            return $obj->getLastError();
-        }
-        // object created successfully. Return it
-        return $obj;
-    }
-
-    /**
-     * Accepts any combination of available parameters as associative array:
-     *     enc_key - encryption key for encrypt() method
-     *     dec_key - decryption key for decrypt() method
-     *     public_key - key for validateSign() method
-     *     private_key - key for createSign() method
-     *     hash_func - name of hash function, which will be used to create and validate sign
-     *
-     * @param array $params
-     *        associative array of permitted parameters (see above)
-     *
-     * @return bool   true on success or false on error
-     * @access public
-     */
-    function setParams($params)
-    {
-        if (!is_array($params)) {
-            $this->pushError('parameters must be passed to function as associative array', CRYPT_RSA_ERROR_WRONG_PARAMS);
-            return false;
-        }
-
-        if (isset($params['enc_key'])) {
-            if (Crypt_RSA_Key::isValid($params['enc_key'])) {
-                $this->_enc_key = $params['enc_key'];
-            }
-            else {
-                $this->pushError('wrong encryption key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
-                return false;
-            }
-        }
-        if (isset($params['dec_key'])) {
-            if (Crypt_RSA_Key::isValid($params['dec_key'])) {
-                $this->_dec_key = $params['dec_key'];
-            }
-            else {
-                $this->pushError('wrong decryption key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
-                return false;
-            }
-        }
-        if (isset($params['private_key'])) {
-            if (Crypt_RSA_Key::isValid($params['private_key'])) {
-                if ($params['private_key']->getKeyType() != 'private') {
-                    $this->pushError('private key must have "private" attribute', CRYPT_RSA_ERROR_WRONG_KEY_TYPE);
-                    return false;
-                }
-                $this->_private_key = $params['private_key'];
-            }
-            else {
-                $this->pushError('wrong private key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
-                return false;
-            }
-        }
-        if (isset($params['public_key'])) {
-            if (Crypt_RSA_Key::isValid($params['public_key'])) {
-                if ($params['public_key']->getKeyType() != 'public') {
-                    $this->pushError('public key must have "public" attribute', CRYPT_RSA_ERROR_WRONG_KEY_TYPE);
-                    return false;
-                }
-                $this->_public_key = $params['public_key'];
-            }
-            else {
-                $this->pushError('wrong public key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
-                return false;
-            }
-        }
-        if (isset($params['hash_func'])) {
-            if (!function_exists($params['hash_func'])) {
-                $this->pushError('cannot find hash function with name [' . $params['hash_func'] . ']', CRYPT_RSA_ERROR_WRONG_HASH_FUNC);
-                return false;
-            }
-            $this->_hash_func = $params['hash_func'];
-        }
-        return true; // all ok
-    }
-
-    /**
-     * Ecnrypts $plain_data by the key $this->_enc_key or $key.
-     *
-     * @param string $plain_data  data, which must be encrypted
-     * @param object $key         encryption key (object of Crypt_RSA_Key class)
-     * @return mixed
-     *         encrypted data as string on success or false on error
-     *
-     * @access public
-     */
-    function encrypt($plain_data, $key = null)
-    {
-        $enc_data = $this->encryptBinary($plain_data, $key);
-        if ($enc_data !== false) {
-            return base64_encode($enc_data);
-        }
-        // error during encripting data
-        return false;
-    }
-
-    /**
-     * Ecnrypts $plain_data by the key $this->_enc_key or $key.
-     *
-     * @param string $plain_data  data, which must be encrypted
-     * @param object $key         encryption key (object of Crypt_RSA_Key class)
-     * @return mixed
-     *         encrypted data as binary string on success or false on error
-     *
-     * @access public
-     */
-    function encryptBinary($plain_data, $key = null)
-    {
-        if (is_null($key)) {
-            // use current encryption key
-            $key = $this->_enc_key;
-        }
-        else if (!Crypt_RSA_Key::isValid($key)) {
-            $this->pushError('invalid encryption key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
-            return false;
-        }
-
-        // append tail \x01 to plain data. It needs for correctly decrypting of data
-        $plain_data .= "\x01";
-
-        $plain_data = $this->_math_obj->bin2int($plain_data);
-        $exp = $this->_math_obj->bin2int($key->getExponent());
-        $modulus = $this->_math_obj->bin2int($key->getModulus());
-
-        // divide plain data into chunks
-        $data_len = $this->_math_obj->bitLen($plain_data);
-        $chunk_len = $key->getKeyLength() - 1;
-        $block_len = (int) ceil($chunk_len / 8);
-        $curr_pos = 0;
-        $enc_data = '';
-        while ($curr_pos < $data_len) {
-            $tmp = $this->_math_obj->subint($plain_data, $curr_pos, $chunk_len);
-            $enc_data .= str_pad(
-                $this->_math_obj->int2bin($this->_math_obj->powmod($tmp, $exp, $modulus)),
-                $block_len,
-                "\0"
-            );
-            $curr_pos += $chunk_len;
-        }
-        return $enc_data;
-    }
-
-    /**
-     * Decrypts $enc_data by the key $this->_dec_key or $key.
-     *
-     * @param string $enc_data  encrypted data as string
-     * @param object $key       decryption key (object of RSA_Crypt_Key class)
-     * @return mixed
-     *         decrypted data as string on success or false on error
-     *
-     * @access public
-     */
-    function decrypt($enc_data, $key = null)
-    {
-        $enc_data = base64_decode($enc_data);
-        return $this->decryptBinary($enc_data, $key);
-    }
-
-    /**
-     * Decrypts $enc_data by the key $this->_dec_key or $key.
-     *
-     * @param string $enc_data  encrypted data as binary string
-     * @param object $key       decryption key (object of RSA_Crypt_Key class)
-     * @return mixed
-     *         decrypted data as string on success or false on error
-     *
-     * @access public
-     */
-    function decryptBinary($enc_data, $key = null)
-    {
-        if (is_null($key)) {
-            // use current decryption key
-            $key = $this->_dec_key;
-        }
-        else if (!Crypt_RSA_Key::isValid($key)) {
-            $this->pushError('invalid decryption key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
-            return false;
-        }
-
-        $exp = $this->_math_obj->bin2int($key->getExponent());
-        $modulus = $this->_math_obj->bin2int($key->getModulus());
-
-        $data_len = strlen($enc_data);
-        $chunk_len = $key->getKeyLength() - 1;
-        $block_len = (int) ceil($chunk_len / 8);
-        $curr_pos = 0;
-        $bit_pos = 0;
-        $plain_data = $this->_math_obj->bin2int("\0");
-        while ($curr_pos < $data_len) {
-            $tmp = $this->_math_obj->bin2int(substr($enc_data, $curr_pos, $block_len));
-            $tmp = $this->_math_obj->powmod($tmp, $exp, $modulus);
-            $plain_data = $this->_math_obj->bitOr($plain_data, $tmp, $bit_pos);
-            $bit_pos += $chunk_len;
-            $curr_pos += $block_len;
-        }
-        $result = $this->_math_obj->int2bin($plain_data);
-
-        // delete tail, containing of \x01
-        $tail = ord($result{strlen($result) - 1});
-        if ($tail != 1) {
-            $this->pushError("Error tail of decrypted text = {$tail}. Expected 1", CRYPT_RSA_ERROR_WRONG_TAIL);
-            return false;
-        }
-        return substr($result, 0, -1);
-    }
-
-    /**
-     * Creates sign for document $document, using $this->_private_key or $private_key
-     * as private key and $this->_hash_func or $hash_func as hash function.
-     *
-     * @param string $document     document, which must be signed
-     * @param object $private_key  private key (object of Crypt_RSA_Key type)
-     * @param string $hash_func    name of hash function, which will be used during signing
-     * @return mixed
-     *         signature of $document as string on success or false on error
-     *
-     * @access public
-     */
-    function createSign($document, $private_key = null, $hash_func = null)
-    {
-        // check private key
-        if (is_null($private_key)) {
-            $private_key = $this->_private_key;
-        }
-        else if (!Crypt_RSA_Key::isValid($private_key)) {
-            $this->pushError('invalid private key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
-            return false;
-        }
-        if ($private_key->getKeyType() != 'private') {
-            $this->pushError('signing key must be private', CRYPT_RSA_ERROR_NEED_PRV_KEY);
-            return false;
-        }
-
-        // check hash_func
-        if (is_null($hash_func)) {
-            $hash_func = $this->_hash_func;
-        }
-        if (!function_exists($hash_func)) {
-            $this->pushError("cannot find hash function with name [$hash_func]", CRYPT_RSA_ERROR_WRONG_HASH_FUNC);
-            return false;
-        }
-
-        return $this->encrypt($hash_func($document), $private_key);
-    }
-
-    /**
-     * Validates $signature for document $document with public key $this->_public_key
-     * or $public_key and hash function $this->_hash_func or $hash_func.
-     *
-     * @param string $document    document, signature of which must be validated
-     * @param string $signature   signature, which must be validated
-     * @param object $public_key  public key (object of Crypt_RSA_Key class)
-     * @param string $hash_func   hash function, which will be used during validating signature
-     * @return mixed
-     *         true, if signature of document is valid
-     *         false, if signature of document is invalid
-     *         null on error
-     *
-     * @access public
-     */
-    function validateSign($document, $signature, $public_key = null, $hash_func = null)
-    {
-        // check public key
-        if (is_null($public_key)) {
-            $public_key = $this->_public_key;
-        }
-        else if (!Crypt_RSA_Key::isValid($public_key)) {
-            $this->pushError('invalid public key. It must be an object of Crypt_RSA_Key class', CRYPT_RSA_ERROR_WRONG_KEY);
-            return null;
-        }
-        if ($public_key->getKeyType() != 'public') {
-            $this->pushError('validating key must be public', CRYPT_RSA_ERROR_NEED_PUB_KEY);
-            return null;
-        }
-
-        // check hash_func
-        if (is_null($hash_func)) {
-            $hash_func = $this->_hash_func;
-        }
-        if (!function_exists($hash_func)) {
-            $this->pushError("cannot find hash function with name [$hash_func]", CRYPT_RSA_ERROR_WRONG_HASH_FUNC);
-            return null;
-        }
-
-        return $hash_func($document) == $this->decrypt($signature, $public_key);
-    }
-}
-
-?>
\ No newline at end of file
diff --git a/plugins/OStatus/extlib/Crypt/RSA/ErrorHandler.php b/plugins/OStatus/extlib/Crypt/RSA/ErrorHandler.php
deleted file mode 100644
index 8f39741e0..000000000
--- a/plugins/OStatus/extlib/Crypt/RSA/ErrorHandler.php
+++ /dev/null
@@ -1,234 +0,0 @@
-<?php
-/**
- * Crypt_RSA allows to do following operations:
- *     - key pair generation
- *     - encryption and decryption
- *     - signing and sign validation
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category  Encryption
- * @package   Crypt_RSA
- * @author    Alexander Valyalkin <valyala@gmail.com>
- * @copyright 2005 Alexander Valyalkin
- * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version   CVS: $Id: ErrorHandler.php,v 1.4 2009/01/05 08:30:29 clockwerx Exp $
- * @link      http://pear.php.net/package/Crypt_RSA
- */
-
-/**
- * uses PEAR's error handling
- */
-require_once 'PEAR.php';
-
-/**
- * cannot load required extension for math wrapper
- */
-define('CRYPT_RSA_ERROR_NO_EXT', 1);
-
-/**
- * cannot load any math wrappers.
- * Possible reasons:
- *  - there is no any wrappers (they must exist in Crypt/RSA/Math folder )
- *  - all available wrappers are incorrect (read docs/Crypt_RSA/docs/math_wrappers.txt )
- *  - cannot load any extension, required by available wrappers
- */
-define('CRYPT_RSA_ERROR_NO_WRAPPERS', 2);
-
-/**
- * cannot find file, containing requested math wrapper
- */
-define('CRYPT_RSA_ERROR_NO_FILE', 3);
-
-/**
- * cannot find math wrapper class in the math wrapper file
- */
-define('CRYPT_RSA_ERROR_NO_CLASS', 4);
-
-/**
- * invalid key type passed to function (it must be 'public' or 'private')
- */
-define('CRYPT_RSA_ERROR_WRONG_KEY_TYPE', 5);
-
-/**
- * key modulus must be greater than key exponent
- */
-define('CRYPT_RSA_ERROR_EXP_GE_MOD', 6);
-
-/**
- * missing $key_len parameter in Crypt_RSA_KeyPair::generate($key_len) function
- */
-define('CRYPT_RSA_ERROR_MISSING_KEY_LEN', 7);
-
-/**
- * wrong key object passed to function (it must be an object of Crypt_RSA_Key class)
- */
-define('CRYPT_RSA_ERROR_WRONG_KEY', 8);
-
-/**
- * wrong name of hash function passed to Crypt_RSA::setParams() function
- */
-define('CRYPT_RSA_ERROR_WRONG_HASH_FUNC', 9);
-
-/**
- * key, used for signing, must be private
- */
-define('CRYPT_RSA_ERROR_NEED_PRV_KEY', 10);
-
-/**
- * key, used for sign validating, must be public
- */
-define('CRYPT_RSA_ERROR_NEED_PUB_KEY', 11);
-
-/**
- * parameters must be passed to function as associative array
- */
-define('CRYPT_RSA_ERROR_WRONG_PARAMS', 12);
-
-/**
- * error tail of decrypted text. Maybe, wrong decryption key?
- */
-define('CRYPT_RSA_ERROR_WRONG_TAIL', 13);
-
-/**
- * Crypt_RSA_ErrorHandler class.
- *
- * This class is used as base for Crypt_RSA, Crypt_RSA_Key
- * and Crypt_RSA_KeyPair classes.
- *
- * It provides following functions:
- *   - isError() - returns true, if list contains errors, else returns false
- *   - getErrorList() - returns error list
- *   - getLastError() - returns last error from error list or false, if list is empty
- *   - pushError($errstr) - pushes $errstr into the error list
- *   - setErrorHandler($new_error_handler) - sets error handler function
- *   - getErrorHandler() - returns name of error handler function
- *
- * @category  Encryption
- * @package   Crypt_RSA
- * @author    Alexander Valyalkin <valyala@gmail.com>
- * @copyright 2005 Alexander Valyalkin
- * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version   Release: @package_version@
- * @link      http://pear.php.net/package/Crypt_RSA
- * @access    public
- */
-class Crypt_RSA_ErrorHandler
-{
-    /**
-     * array of error objects, pushed by $this->pushError()
-     *
-     * @var array
-     * @access private
-     */
-    var $_errors = array();
-
-    /**
-     * name of error handler - function, which calls on $this->pushError() call
-     *
-     * @var string
-     * @access private
-     */
-    var $_error_handler = '';
-
-    /**
-     * Returns true if list of errors is not empty, else returns false
-     *
-     * @param mixed $err Check if the object is an error
-     *
-     * @return bool    true, if list of errors is not empty or $err is PEAR_Error object, else false
-     * @access public
-     */
-    function isError($err = null)
-    {
-        return is_null($err) ? (sizeof($this->_errors) > 0) : PEAR::isError($err);
-    }
-
-    /**
-     * Returns list of all errors, pushed to error list by $this->pushError()
-     *
-     * @return array    list of errors (usually it contains objects of PEAR_Error class)
-     * @access public
-     */
-    function getErrorList()
-    {
-        return $this->_errors;
-    }
-
-    /**
-     * Returns last error from errors list or false, if list is empty
-     *
-     * @return mixed
-     *         last error from errors list (usually it is PEAR_Error object)
-     *         or false, if list is empty.
-     *
-     * @access public
-     */
-    function getLastError()
-    {
-        $len = sizeof($this->_errors);
-        return $len ? $this->_errors[$len - 1] : false;
-    }
-
-    /**
-     * pushes error object $error to the error list
-     *
-     * @param string $errstr error string
-     * @param int    $errno  error number
-     *
-     * @return bool          true on success, false on error
-     * @access public
-     */
-    function pushError($errstr, $errno = 0)
-    {
-        $this->_errors[] = PEAR::raiseError($errstr, $errno);
-
-        if ($this->_error_handler != '') {
-            // call user defined error handler
-            $func = $this->_error_handler;
-            $func($this);
-        }
-        return true;
-    }
-
-    /**
-     * sets error handler to function with name $func_name.
-     * Function $func_name must accept one parameter - current
-     * object, which triggered error.
-     *
-     * @param string $func_name name of error handler function
-     *
-     * @return bool             true on success, false on error
-     * @access public
-     */
-    function setErrorHandler($func_name = '')
-    {
-        if ($func_name == '') {
-            $this->_error_handler = '';
-        }
-        if (!function_exists($func_name)) {
-            return false;
-        }
-        $this->_error_handler = $func_name;
-        return true;
-    }
-
-    /**
-     * returns name of current error handler, or null if there is no error handler
-     *
-     * @return mixed  error handler name as string or null, if there is no error handler
-     * @access public
-     */
-    function getErrorHandler()
-    {
-        return $this->_error_handler;
-    }
-}
-
-?>
diff --git a/plugins/OStatus/extlib/Crypt/RSA/Key.php b/plugins/OStatus/extlib/Crypt/RSA/Key.php
deleted file mode 100644
index 659530229..000000000
--- a/plugins/OStatus/extlib/Crypt/RSA/Key.php
+++ /dev/null
@@ -1,315 +0,0 @@
-<?php
-/**
- * Crypt_RSA allows to do following operations:
- *     - key pair generation
- *     - encryption and decryption
- *     - signing and sign validation
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category  Encryption
- * @package   Crypt_RSA
- * @author    Alexander Valyalkin <valyala@gmail.com>
- * @copyright 2005 Alexander Valyalkin
- * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version   CVS: $Id: Key.php,v 1.6 2009/01/05 08:30:29 clockwerx Exp $
- * @link      http://pear.php.net/package/Crypt_RSA
- */
-
-/**
- * RSA error handling facilities
- */
-require_once 'Crypt/RSA/ErrorHandler.php';
-
-/**
- * loader for RSA math wrappers
- */
-require_once 'Crypt/RSA/MathLoader.php';
-
-/**
- * Crypt_RSA_Key class, derived from Crypt_RSA_ErrorHandler
- *
- * Provides the following functions:
- *  - getKeyLength() - returns bit key length
- *  - getExponent() - returns key exponent as binary string
- *  - getModulus() - returns key modulus as binary string
- *  - getKeyType() - returns type of the key (public or private)
- *  - toString() - returns serialized key as string
- *  - fromString($key_str) - static function; returns key, unserialized from string
- *  - isValid($key) - static function for validating of $key
- *
- * Example usage:
- *    // create new 1024-bit key pair
- *    $key_pair = new Crypt_RSA_KeyPair(1024);
- * 
- *    // get public key (its class is Crypt_RSA_Key)
- *    $key = $key_pair->getPublicKey();
- *
- *    // get key length
- *    $len = $key->getKeyLength();
- *
- *    // get modulus as string
- *    $modulus = $key->getModulus();
- *
- *    // get exponent as string
- *    $exponent = $key->getExponent();
- *
- *    // get string represenation of key (use it instead of serialization of Crypt_RSA_Key object)
- *    $key_in_str = $key->toString();
- *
- *    // restore key object from string using 'BigInt' math wrapper
- *    $key = Crypt_RSA_Key::fromString($key_in_str, 'BigInt');
- *
- *    // error check
- *    if ($key->isError()) {
- *        echo "error while unserializing key object:\n";
- *        $erorr = $key->getLastError();
- *        echo $error->getMessage(), "\n";
- *    }
- *
- *    // validate key
- *    if (Crypt_RSA_Key::isValid($key)) echo 'valid key';
- *    else echo 'invalid key';
- *
- *    // using factory() method instead of constructor (it returns PEAR_Error object on failure)
- *    $rsa_obj = &Crypt_RSA_Key::factory($modulus, $exp, $key_type);
- *    if (PEAR::isError($rsa_obj)) {
- *        echo "error: ", $rsa_obj->getMessage(), "\n";
- *    }
- *
- * @category  Encryption
- * @package   Crypt_RSA
- * @author    Alexander Valyalkin <valyala@gmail.com>
- * @copyright 2005 Alexander Valyalkin
- * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version   Release: @package_version@
- * @link      http://pear.php.net/package/Crypt_RSA
- * @access    public
- */
-class Crypt_RSA_Key extends Crypt_RSA_ErrorHandler
-{
-    /**
-     * Reference to math wrapper object, which is used to
-     * manipulate large integers in RSA algorithm.
-     *
-     * @var object of Crypt_RSA_Math_* class
-     * @access private
-     */
-    var $_math_obj;
-
-    /**
-     * shared modulus
-     *
-     * @var string
-     * @access private
-     */
-    var $_modulus;
-
-    /**
-     * exponent
-     *
-     * @var string
-     * @access private
-     */
-    var $_exp;
-
-    /**
-     * key type (private or public)
-     *
-     * @var string
-     * @access private
-     */
-    var $_key_type;
-
-    /**
-     * key length in bits
-     *
-     * @var int
-     * @access private
-     */
-    var $_key_len;
-
-    /**
-     * Crypt_RSA_Key constructor.
-     *
-     * You should pass in the name of math wrapper, which will be used to
-     *        perform different operations with big integers.
-     *        See contents of Crypt/RSA/Math folder for examples of wrappers.
-     *        Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
-     *
-     * @param string $modulus       key modulus
-     * @param string $exp           key exponent
-     * @param string $key_type      type of the key (public or private)
-     * @param string $wrapper_name  wrapper to use
-     * @param string $error_handler name of error handler function
-     *
-     * @access public
-     */
-    function Crypt_RSA_Key($modulus, $exp, $key_type, $wrapper_name = 'default', $error_handler = '')
-    {
-        // set error handler
-        $this->setErrorHandler($error_handler);
-        // try to load math wrapper $wrapper_name
-        $obj = &Crypt_RSA_MathLoader::loadWrapper($wrapper_name);
-        if ($this->isError($obj)) {
-            // error during loading of math wrapper
-            $this->pushError($obj); // push error object into error list
-            return;
-        }
-        $this->_math_obj = &$obj;
-
-        $this->_modulus = $modulus;
-        $this->_exp = $exp;
-
-        if (!in_array($key_type, array('private', 'public'))) {
-            $this->pushError('invalid key type. It must be private or public', CRYPT_RSA_ERROR_WRONG_KEY_TYPE);
-            return;
-        }
-        $this->_key_type = $key_type;
-
-        /* check length of modulus & exponent ( abs(modulus) > abs(exp) ) */
-        $mod_num = $this->_math_obj->bin2int($this->_modulus);
-        $exp_num = $this->_math_obj->bin2int($this->_exp);
-
-        if ($this->_math_obj->cmpAbs($mod_num, $exp_num) <= 0) {
-            $this->pushError('modulus must be greater than exponent', CRYPT_RSA_ERROR_EXP_GE_MOD);
-            return;
-        }
-
-        // determine key length
-        $this->_key_len = $this->_math_obj->bitLen($mod_num);
-    }
-
-    /**
-     * Crypt_RSA_Key factory.
-     *
-     * @param string $modulus       key modulus
-     * @param string $exp           key exponent
-     * @param string $key_type      type of the key (public or private)
-     * @param string $wrapper_name  wrapper to use
-     * @param string $error_handler name of error handler function
-     *
-     * @return object   new Crypt_RSA_Key object on success or PEAR_Error object on failure
-     * @access public
-     */
-    function factory($modulus, $exp, $key_type, $wrapper_name = 'default', $error_handler = '')
-    {
-        $obj = new Crypt_RSA_Key($modulus, $exp, $key_type, $wrapper_name, $error_handler);
-        if ($obj->isError()) {
-            // error during creating a new object. Retrurn PEAR_Error object
-            return $obj->getLastError();
-        }
-        // object created successfully. Return it
-        return $obj;
-    }
-
-    /**
-     * Calculates bit length of the key
-     *
-     * @return int    bit length of key
-     * @access public
-     */
-    function getKeyLength()
-    {
-        return $this->_key_len;
-    }
-
-    /**
-     * Returns modulus part of the key as binary string,
-     * which can be used to construct new Crypt_RSA_Key object.
-     *
-     * @return string  modulus as binary string
-     * @access public
-     */
-    function getModulus()
-    {
-        return $this->_modulus;
-    }
-
-    /**
-     * Returns exponent part of the key as binary string,
-     * which can be used to construct new Crypt_RSA_Key object.
-     *
-     * @return string  exponent as binary string
-     * @access public
-     */
-    function getExponent()
-    {
-        return $this->_exp;
-    }
-
-    /**
-     * Returns key type (public, private)
-     *
-     * @return string  key type (public, private)
-     * @access public
-     */
-    function getKeyType()
-    {
-        return $this->_key_type;
-    }
-
-    /**
-     * Returns string representation of key
-     *
-     * @return string  key, serialized to string
-     * @access public
-     */
-    function toString()
-    {
-        return base64_encode(
-            serialize(
-                array($this->_modulus, $this->_exp, $this->_key_type)
-            )
-        );
-    }
-
-    /**
-     * Returns Crypt_RSA_Key object, unserialized from
-     * string representation of key.
-     *
-     * optional parameter $wrapper_name - is the name of math wrapper,
-     * which will be used during unserialization of this object.
-     *
-     * This function can be called statically:
-     *     $key = Crypt_RSA_Key::fromString($key_in_string, 'BigInt');
-     *
-     * @param string $key_str      RSA key, serialized into string
-     * @param string $wrapper_name optional math wrapper name
-     *
-     * @return object        key as Crypt_RSA_Key object
-     * @access public
-     * @static
-     */
-    function fromString($key_str, $wrapper_name = 'default')
-    {
-        list($modulus, $exponent, $key_type) = unserialize(base64_decode($key_str));
-        $obj = new Crypt_RSA_Key($modulus, $exponent, $key_type, $wrapper_name);
-        return $obj;
-    }
-
-    /**
-     * Validates key
-     * This function can be called statically:
-     *    $is_valid = Crypt_RSA_Key::isValid($key)
-     *
-     * Returns true, if $key is valid Crypt_RSA key, else returns false
-     *
-     * @param object $key Crypt_RSA_Key object for validating
-     *
-     * @return bool        true if $key is valid, else false
-     * @access public
-     */
-    function isValid($key)
-    {
-        return (is_object($key) && strtolower(get_class($key)) === strtolower(__CLASS__));
-    }
-}
-
-?>
diff --git a/plugins/OStatus/extlib/Crypt/RSA/KeyPair.php b/plugins/OStatus/extlib/Crypt/RSA/KeyPair.php
deleted file mode 100644
index ecc0b7dc7..000000000
--- a/plugins/OStatus/extlib/Crypt/RSA/KeyPair.php
+++ /dev/null
@@ -1,804 +0,0 @@
-<?php
-/**
- * Crypt_RSA allows to do following operations:
- *     - key pair generation
- *     - encryption and decryption
- *     - signing and sign validation
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category  Encryption
- * @package   Crypt_RSA
- * @author    Alexander Valyalkin <valyala@gmail.com>
- * @copyright 2005 Alexander Valyalkin
- * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version   CVS: $Id: KeyPair.php,v 1.7 2009/01/05 08:30:29 clockwerx Exp $
- * @link      http://pear.php.net/package/Crypt_RSA
- */
-
-/**
- * RSA error handling facilities
- */
-require_once 'Crypt/RSA/ErrorHandler.php';
-
-/**
- * loader for RSA math wrappers
- */
-require_once 'Crypt/RSA/MathLoader.php';
-
-/**
- * helper class for single key managing
- */
-require_once 'Crypt/RSA/Key.php';
-
-/**
- * Crypt_RSA_KeyPair class, derived from Crypt_RSA_ErrorHandler
- *
- * Provides the following functions:
- *  - generate($key) - generates new key pair
- *  - getPublicKey() - returns public key
- *  - getPrivateKey() - returns private key
- *  - getKeyLength() - returns bit key length
- *  - setRandomGenerator($func_name) - sets random generator to $func_name
- *  - fromPEMString($str) - retrieves keypair from PEM-encoded string
- *  - toPEMString() - stores keypair to PEM-encoded string
- *  - isEqual($keypair2) - compares current keypair to $keypair2
- *
- * Example usage:
- *    // create new 1024-bit key pair
- *    $key_pair = new Crypt_RSA_KeyPair(1024);
- *
- *    // error check
- *    if ($key_pair->isError()) {
- *        echo "error while initializing Crypt_RSA_KeyPair object:\n";
- *        $erorr = $key_pair->getLastError();
- *        echo $error->getMessage(), "\n";
- *    }
- *
- *    // get public key
- *    $public_key = $key_pair->getPublicKey();
- * 
- *    // get private key
- *    $private_key = $key_pair->getPrivateKey();
- * 
- *    // generate new 512-bit key pair
- *    $key_pair->generate(512);
- *
- *    // error check
- *    if ($key_pair->isError()) {
- *        echo "error while generating key pair:\n";
- *        $erorr = $key_pair->getLastError();
- *        echo $error->getMessage(), "\n";
- *    }
- *
- *    // get key pair length
- *    $length = $key_pair->getKeyLength();
- *
- *    // set random generator to $func_name, where $func_name
- *    // consists name of random generator function. See comments
- *    // before setRandomGenerator() method for details
- *    $key_pair->setRandomGenerator($func_name);
- *
- *    // error check
- *    if ($key_pair->isError()) {
- *        echo "error while changing random generator:\n";
- *        $erorr = $key_pair->getLastError();
- *        echo $error->getMessage(), "\n";
- *    }
- *
- *    // using factory() method instead of constructor (it returns PEAR_Error object on failure)
- *    $rsa_obj = &Crypt_RSA_KeyPair::factory($key_len);
- *    if (PEAR::isError($rsa_obj)) {
- *        echo "error: ", $rsa_obj->getMessage(), "\n";
- *    }
- *
- *    // read key pair from PEM-encoded string:
- *    $str = "-----BEGIN RSA PRIVATE KEY-----"
- *         . "MCsCAQACBHr5LDkCAwEAAQIEBc6jbQIDAOCfAgMAjCcCAk3pAgJMawIDAL41"
- *         . "-----END RSA PRIVATE KEY-----";
- *    $keypair = Crypt_RSA_KeyPair::fromPEMString($str);
- *
- *    // read key pair from .pem file 'private.pem':
- *    $str = file_get_contents('private.pem');
- *    $keypair = Crypt_RSA_KeyPair::fromPEMString($str);
- *
- *    // generate and write 1024-bit key pair to .pem file 'private_new.pem'
- *    $keypair = new Crypt_RSA_KeyPair(1024);
- *    $str = $keypair->toPEMString();
- *    file_put_contents('private_new.pem', $str);
- *
- *    // compare $keypair1 to $keypair2
- *    if ($keypair1->isEqual($keypair2)) {
- *        echo "keypair1 = keypair2\n";
- *    }
- *    else {
- *        echo "keypair1 != keypair2\n";
- *    }
- *
- * @category  Encryption
- * @package   Crypt_RSA
- * @author    Alexander Valyalkin <valyala@gmail.com>
- * @copyright 2005 Alexander Valyalkin
- * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version   Release: @package_version@
- * @link      http://pear.php.net/package/Crypt_RSA
- * @access    public
- */
-class Crypt_RSA_KeyPair extends Crypt_RSA_ErrorHandler
-{
-    /**
-     * Reference to math wrapper object, which is used to
-     * manipulate large integers in RSA algorithm.
-     *
-     * @var object of Crypt_RSA_Math_* class
-     * @access private
-     */
-    var $_math_obj;
-
-    /**
-     * length of each key in the key pair
-     *
-     * @var int
-     * @access private
-     */
-    var $_key_len;
-
-    /**
-     * public key
-     *
-     * @var object of Crypt_RSA_KEY class
-     * @access private
-     */
-    var $_public_key;
-
-    /**
-     * private key
-     *
-     * @var object of Crypt_RSA_KEY class
-     * @access private
-     */
-    var $_private_key;
-
-    /**
-     * name of function, which is used as random generator
-     *
-     * @var string
-     * @access private
-     */
-    var $_random_generator;
-
-    /**
-     * RSA keypair attributes [version, n, e, d, p, q, dmp1, dmq1, iqmp] as associative array
-     *
-     * @var array
-     * @access private
-     */
-    var $_attrs;
-
-    /**
-     * Returns names of keypair attributes from $this->_attrs array
-     *
-     * @return array  Array of keypair attributes names
-     * @access private
-     */
-    function _get_attr_names() 
-    {
-        return array('version', 'n', 'e', 'd', 'p', 'q', 'dmp1', 'dmq1', 'iqmp');
-    }
-
-    /**
-     * Parses ASN.1 string [$str] starting form position [$pos].
-     * Returns tag and string value of parsed object.
-     *
-     * @param string                 $str
-     * @param int                    &$pos
-     * @param Crypt_RSA_ErrorHandler &$err_handler
-     *
-     * @return mixed    Array('tag' => ..., 'str' => ...) on success, false on error
-     * @access private
-     */
-    function _ASN1Parse($str, &$pos, &$err_handler)
-    {
-        $max_pos = strlen($str);
-        if ($max_pos < 2) {
-            $err_handler->pushError("ASN.1 string too short");
-            return false;
-        }
-
-        // get ASN.1 tag value
-        $tag = ord($str[$pos++]) & 0x1f;
-        if ($tag == 0x1f) {
-            $tag = 0;
-            do {
-                $n = ord($str[$pos++]);
-                $tag <<= 7;
-                $tag |= $n & 0x7f;
-            } while (($n & 0x80) && $pos < $max_pos);
-        }
-        if ($pos >= $max_pos) {
-            $err_handler->pushError("ASN.1 string too short");
-            return false;
-        }
-
-        // get ASN.1 object length
-        $len = ord($str[$pos++]);
-        if ($len & 0x80) {
-            $n = $len & 0x1f;
-            $len = 0;
-            while ($n-- && $pos < $max_pos) {
-                $len <<= 8;
-                $len |= ord($str[$pos++]);
-            }
-        }
-        if ($pos >= $max_pos || $len > $max_pos - $pos) {
-            $err_handler->pushError("ASN.1 string too short");
-            return false;
-        }
-
-        // get string value of ASN.1 object
-        $str = substr($str, $pos, $len);
-
-        return array(
-            'tag' => $tag,
-            'str' => $str,
-        );
-    }
-
-    /**
-     * Parses ASN.1 sting [$str] starting from position [$pos].
-     * Returns string representation of number, which can be passed
-     * in bin2int() function of math wrapper.
-     *
-     * @param string                 $str
-     * @param int                    &$pos
-     * @param Crypt_RSA_ErrorHandler &$err_handler
-     *
-     * @return mixed   string representation of parsed number on success, false on error
-     * @access private
-     */
-    function _ASN1ParseInt($str, &$pos, &$err_handler)
-    {
-        $tmp = Crypt_RSA_KeyPair::_ASN1Parse($str, $pos, $err_handler);
-        if ($err_handler->isError()) {
-            return false;
-        }
-        if ($tmp['tag'] != 0x02) {
-            $errstr = sprintf("wrong ASN tag value: 0x%02x. Expected 0x02 (INTEGER)", $tmp['tag']);
-            $err_handler->pushError($errstr);
-            return false;
-        }
-        $pos += strlen($tmp['str']);
-
-        return strrev($tmp['str']);
-    }
-
-    /**
-     * Constructs ASN.1 string from tag $tag and object $str
-     *
-     * @param string $str            ASN.1 object string
-     * @param int    $tag            ASN.1 tag value
-     * @param bool   $is_constructed 
-     * @param bool   $is_private 
-     *
-     * @return ASN.1-encoded string
-     * @access private
-     */
-    function _ASN1Store($str, $tag, $is_constructed = false, $is_private = false)
-    {
-        $out = '';
-
-        // encode ASN.1 tag value
-        $tag_ext = ($is_constructed ? 0x20 : 0) | ($is_private ? 0xc0 : 0);
-        if ($tag < 0x1f) {
-            $out .= chr($tag | $tag_ext);
-        } else {
-            $out .= chr($tag_ext | 0x1f);
-            $tmp = chr($tag & 0x7f);
-            $tag >>= 7;
-            while ($tag) {
-                $tmp .= chr(($tag & 0x7f) | 0x80);
-                $tag >>= 7;
-            }
-            $out .= strrev($tmp);
-        }
-
-        // encode ASN.1 object length
-        $len = strlen($str);
-        if ($len < 0x7f) {
-            $out .= chr($len);
-        } else {
-            $tmp = '';
-            $n = 0;
-            while ($len) {
-                $tmp .= chr($len & 0xff);
-                $len >>= 8;
-                $n++;
-            }
-            $out .= chr($n | 0x80);
-            $out .= strrev($tmp);
-        }
-
-        return $out . $str;
-    }
-
-    /**
-     * Constructs ASN.1 string from binary representation of big integer
-     *
-     * @param string $str binary representation of big integer
-     *
-     * @return ASN.1-encoded string
-     * @access private
-     */
-    function _ASN1StoreInt($str)
-    {
-        $str = strrev($str);
-        return Crypt_RSA_KeyPair::_ASN1Store($str, 0x02);
-    }
-
-    /**
-     * Crypt_RSA_KeyPair constructor.
-     *
-     * Wrapper: name of math wrapper, which will be used to
-     *        perform different operations with big integers.
-     *        See contents of Crypt/RSA/Math folder for examples of wrappers.
-     *        Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
-     *
-     * @param int      $key_len          bit length of key pair, which will be generated in constructor
-     * @param string   $wrapper_name     wrapper name
-     * @param string   $error_handler    name of error handler function
-     * @param callback $random_generator function which will be used as random generator
-     *
-     * @access public
-     */
-    function Crypt_RSA_KeyPair($key_len, $wrapper_name = 'default', $error_handler = '', $random_generator = null)
-    {
-        // set error handler
-        $this->setErrorHandler($error_handler);
-        // try to load math wrapper
-        $obj = &Crypt_RSA_MathLoader::loadWrapper($wrapper_name);
-        if ($this->isError($obj)) {
-            // error during loading of math wrapper
-            $this->pushError($obj);
-            return;
-        }
-        $this->_math_obj = &$obj;
-
-        // set random generator
-        if (!$this->setRandomGenerator($random_generator)) {
-            // error in setRandomGenerator() function
-            return;
-        }
-
-        if (is_array($key_len)) {
-            // ugly BC hack - it is possible to pass RSA private key attributes [version, n, e, d, p, q, dmp1, dmq1, iqmp]
-            // as associative array instead of key length to Crypt_RSA_KeyPair constructor
-            $rsa_attrs = $key_len;
-
-            // convert attributes to big integers
-            $attr_names = $this->_get_attr_names();
-            foreach ($attr_names as $attr) {
-                if (!isset($rsa_attrs[$attr])) {
-                    $this->pushError("missing required RSA attribute [$attr]");
-                    return;
-                }
-                ${$attr} = $this->_math_obj->bin2int($rsa_attrs[$attr]);
-            }
-
-            // check primality of p and q
-            if (!$this->_math_obj->isPrime($p)) {
-                $this->pushError("[p] must be prime");
-                return;
-            }
-            if (!$this->_math_obj->isPrime($q)) {
-                $this->pushError("[q] must be prime");
-                return;
-            }
-
-            // check n = p * q
-            $n1 = $this->_math_obj->mul($p, $q);
-            if ($this->_math_obj->cmpAbs($n, $n1)) {
-                $this->pushError("n != p * q");
-                return;
-            }
-
-            // check e * d = 1 mod (p-1) * (q-1)
-            $p1 = $this->_math_obj->dec($p);
-            $q1 = $this->_math_obj->dec($q);
-            $p1q1 = $this->_math_obj->mul($p1, $q1);
-            $ed = $this->_math_obj->mul($e, $d);
-            $one = $this->_math_obj->mod($ed, $p1q1);
-            if (!$this->_math_obj->isOne($one)) {
-                $this->pushError("e * d != 1 mod (p-1)*(q-1)");
-                return;
-            }
-
-            // check dmp1 = d mod (p-1)
-            $dmp = $this->_math_obj->mod($d, $p1);
-            if ($this->_math_obj->cmpAbs($dmp, $dmp1)) {
-                $this->pushError("dmp1 != d mod (p-1)");
-                return;
-            }
-
-            // check dmq1 = d mod (q-1)
-            $dmq = $this->_math_obj->mod($d, $q1);
-            if ($this->_math_obj->cmpAbs($dmq, $dmq1)) {
-                $this->pushError("dmq1 != d mod (q-1)");
-                return;
-            }
-
-            // check iqmp = 1/q mod p
-            $q1 = $this->_math_obj->invmod($iqmp, $p);
-            if ($this->_math_obj->cmpAbs($q, $q1)) {
-                $this->pushError("iqmp != 1/q mod p");
-                return;
-            }
-
-            // try to create public key object
-            $public_key = &new Crypt_RSA_Key($rsa_attrs['n'], $rsa_attrs['e'], 'public', $wrapper_name, $error_handler);
-            if ($public_key->isError()) {
-                // error during creating public object
-                $this->pushError($public_key->getLastError());
-                return;
-            }
-
-            // try to create private key object
-            $private_key = &new Crypt_RSA_Key($rsa_attrs['n'], $rsa_attrs['d'], 'private', $wrapper_name, $error_handler);
-            if ($private_key->isError()) {
-                // error during creating private key object
-                $this->pushError($private_key->getLastError());
-                return;
-            }
-
-            $this->_public_key = $public_key;
-            $this->_private_key = $private_key;
-            $this->_key_len = $public_key->getKeyLength();
-            $this->_attrs = $rsa_attrs;
-        } else {
-            // generate key pair
-            if (!$this->generate($key_len)) {
-                // error during generating key pair
-                return;
-            }
-        }
-    }
-
-    /**
-     * Crypt_RSA_KeyPair factory.
-     *
-     * Wrapper - Name of math wrapper, which will be used to
-     *        perform different operations with big integers.
-     *        See contents of Crypt/RSA/Math folder for examples of wrappers.
-     *        Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
-     *
-     * @param int      $key_len          bit length of key pair, which will be generated in constructor
-     * @param string   $wrapper_name     wrapper name
-     * @param string   $error_handler    name of error handler function
-     * @param callback $random_generator function which will be used as random generator
-     *
-     * @return object   new Crypt_RSA_KeyPair object on success or PEAR_Error object on failure
-     * @access public
-     */
-    function &factory($key_len, $wrapper_name = 'default', $error_handler = '', $random_generator = null)
-    {
-        $obj = &new Crypt_RSA_KeyPair($key_len, $wrapper_name, $error_handler, $random_generator);
-        if ($obj->isError()) {
-            // error during creating a new object. Return PEAR_Error object
-            return $obj->getLastError();
-        }
-        // object created successfully. Return it
-        return $obj;
-    }
-
-    /**
-     * Generates new Crypt_RSA key pair with length $key_len.
-     * If $key_len is missed, use an old key length from $this->_key_len
-     *
-     * @param int $key_len bit length of key pair, which will be generated
-     *
-     * @return bool         true on success or false on error
-     * @access public
-     */
-    function generate($key_len = null)
-    {
-        if (is_null($key_len)) {
-            // use an old key length
-            $key_len = $this->_key_len;
-            if (is_null($key_len)) {
-                $this->pushError('missing key_len parameter', CRYPT_RSA_ERROR_MISSING_KEY_LEN);
-                return false;
-            }
-        }
-
-        // minimal key length is 8 bit ;)
-        if ($key_len < 8) {
-            $key_len = 8;
-        }
-        // store key length in the _key_len property
-        $this->_key_len = $key_len;
-
-        // set [e] to 0x10001 (65537)
-        $e = $this->_math_obj->bin2int("\x01\x00\x01");
-
-        // generate [p], [q] and [n]
-        $p_len = intval(($key_len + 1) / 2);
-        $q_len = $key_len - $p_len;
-        $p1 = $q1 = 0;
-        do {
-            // generate prime number [$p] with length [$p_len] with the following condition:
-            // GCD($e, $p - 1) = 1
-            do {
-                $p = $this->_math_obj->getPrime($p_len, $this->_random_generator);
-                $p1 = $this->_math_obj->dec($p);
-                $tmp = $this->_math_obj->GCD($e, $p1);
-            } while (!$this->_math_obj->isOne($tmp));
-            // generate prime number [$q] with length [$q_len] with the following conditions:
-            // GCD($e, $q - 1) = 1
-            // $q != $p
-            do {
-                $q = $this->_math_obj->getPrime($q_len, $this->_random_generator);
-                $q1 = $this->_math_obj->dec($q);
-                $tmp = $this->_math_obj->GCD($e, $q1);
-            } while (!$this->_math_obj->isOne($tmp) && !$this->_math_obj->cmpAbs($q, $p));
-            // if (p < q), then exchange them
-            if ($this->_math_obj->cmpAbs($p, $q) < 0) {
-                $tmp = $p;
-                $p = $q;
-                $q = $tmp;
-                $tmp = $p1;
-                $p1 = $q1;
-                $q1 = $tmp;
-            }
-            // calculate n = p * q
-            $n = $this->_math_obj->mul($p, $q);
-        } while ($this->_math_obj->bitLen($n) != $key_len);
-
-        // calculate d = 1/e mod (p - 1) * (q - 1)
-        $pq = $this->_math_obj->mul($p1, $q1);
-        $d = $this->_math_obj->invmod($e, $pq);
-
-        // calculate dmp1 = d mod (p - 1)
-        $dmp1 = $this->_math_obj->mod($d, $p1);
-
-        // calculate dmq1 = d mod (q - 1)
-        $dmq1 = $this->_math_obj->mod($d, $q1);
-
-        // calculate iqmp = 1/q mod p
-        $iqmp = $this->_math_obj->invmod($q, $p);
-
-        // store RSA keypair attributes
-        $this->_attrs = array(
-            'version' => "\x00",
-            'n' => $this->_math_obj->int2bin($n),
-            'e' => $this->_math_obj->int2bin($e),
-            'd' => $this->_math_obj->int2bin($d),
-            'p' => $this->_math_obj->int2bin($p),
-            'q' => $this->_math_obj->int2bin($q),
-            'dmp1' => $this->_math_obj->int2bin($dmp1),
-            'dmq1' => $this->_math_obj->int2bin($dmq1),
-            'iqmp' => $this->_math_obj->int2bin($iqmp),
-        );
-
-        $n = $this->_attrs['n'];
-        $e = $this->_attrs['e'];
-        $d = $this->_attrs['d'];
-
-        // try to create public key object
-        $obj = &new Crypt_RSA_Key($n, $e, 'public', $this->_math_obj->getWrapperName(), $this->_error_handler);
-        if ($obj->isError()) {
-            // error during creating public object
-            $this->pushError($obj->getLastError());
-            return false;
-        }
-        $this->_public_key = &$obj;
-
-        // try to create private key object
-        $obj = &new Crypt_RSA_Key($n, $d, 'private', $this->_math_obj->getWrapperName(), $this->_error_handler);
-        if ($obj->isError()) {
-            // error during creating private key object
-            $this->pushError($obj->getLastError());
-            return false;
-        }
-        $this->_private_key = &$obj;
-
-        return true; // key pair successfully generated
-    }
-
-    /**
-     * Returns public key from the pair
-     *
-     * @return object  public key object of class Crypt_RSA_Key
-     * @access public
-     */
-    function getPublicKey()
-    {
-        return $this->_public_key;
-    }
-
-    /**
-     * Returns private key from the pair
-     *
-     * @return object   private key object of class Crypt_RSA_Key
-     * @access public
-     */
-    function getPrivateKey()
-    {
-        return $this->_private_key;
-    }
-
-    /**
-     * Sets name of random generator function for key generation.
-     * If parameter is skipped, then sets to default random generator.
-     *
-     * Random generator function must return integer with at least 8 lower
-     * significant bits, which will be used as random values.
-     *
-     * @param string $random_generator name of random generator function
-     *
-     * @return bool                     true on success or false on error
-     * @access public
-     */
-    function setRandomGenerator($random_generator = null)
-    {
-        static $default_random_generator = null;
-
-        if (is_string($random_generator)) {
-            // set user's random generator
-            if (!function_exists($random_generator)) {
-                $this->pushError("can't find random generator function with name [{$random_generator}]");
-                return false;
-            }
-            $this->_random_generator = $random_generator;
-        } else {
-            // set default random generator
-            $this->_random_generator = is_null($default_random_generator) ?
-                ($default_random_generator = create_function('', '$a=explode(" ",microtime());return(int)($a[0]*1000000);')) :
-                $default_random_generator;
-        }
-        return true;
-    }
-
-    /**
-     * Returns length of each key in the key pair
-     *
-     * @return int  bit length of each key in key pair
-     * @access public
-     */
-    function getKeyLength()
-    {
-        return $this->_key_len;
-    }
-
-    /**
-     * Retrieves RSA keypair from PEM-encoded string, containing RSA private key.
-     * Example of such string:
-     * -----BEGIN RSA PRIVATE KEY-----
-     * MCsCAQACBHtvbSECAwEAAQIEeYrk3QIDAOF3AgMAjCcCAmdnAgJMawIDALEk
-     * -----END RSA PRIVATE KEY-----
-     *
-     * Wrapper: Name of math wrapper, which will be used to
-     * perform different operations with big integers.
-     * See contents of Crypt/RSA/Math folder for examples of wrappers.
-     * Read docs/Crypt_RSA/docs/math_wrappers.txt for details.
-     *
-     * @param string $str           PEM-encoded string
-     * @param string $wrapper_name  Wrapper name
-     * @param string $error_handler name of error handler function
-     *
-     * @return Crypt_RSA_KeyPair object on success, PEAR_Error object on error
-     * @access public
-     * @static
-     */
-    function &fromPEMString($str, $wrapper_name = 'default', $error_handler = '')
-    {
-        if (isset($this)) {
-            if ($wrapper_name == 'default') {
-                $wrapper_name = $this->_math_obj->getWrapperName();
-            }
-            if ($error_handler == '') {
-                $error_handler = $this->_error_handler;
-            }
-        }
-        $err_handler = &new Crypt_RSA_ErrorHandler;
-        $err_handler->setErrorHandler($error_handler);
-
-        // search for base64-encoded private key
-        if (!preg_match('/-----BEGIN RSA PRIVATE KEY-----([^-]+)-----END RSA PRIVATE KEY-----/', $str, $matches)) {
-            $err_handler->pushError("can't find RSA private key in the string [{$str}]");
-            return $err_handler->getLastError();
-        }
-
-        // parse private key. It is ASN.1-encoded
-        $str = base64_decode($matches[1]);
-        $pos = 0;
-        $tmp = Crypt_RSA_KeyPair::_ASN1Parse($str, $pos, $err_handler);
-        if ($err_handler->isError()) {
-            return $err_handler->getLastError();
-        }
-        if ($tmp['tag'] != 0x10) {
-            $errstr = sprintf("wrong ASN tag value: 0x%02x. Expected 0x10 (SEQUENCE)", $tmp['tag']);
-            $err_handler->pushError($errstr);
-            return $err_handler->getLastError();
-        }
-
-        // parse ASN.1 SEQUENCE for RSA private key
-        $attr_names = Crypt_RSA_KeyPair::_get_attr_names();
-        $n = sizeof($attr_names);
-        $rsa_attrs = array();
-        for ($i = 0; $i < $n; $i++) {
-            $tmp = Crypt_RSA_KeyPair::_ASN1ParseInt($str, $pos, $err_handler);
-            if ($err_handler->isError()) {
-                return $err_handler->getLastError();
-            }
-            $attr = $attr_names[$i];
-            $rsa_attrs[$attr] = $tmp;
-        }
-
-        // create Crypt_RSA_KeyPair object.
-        $keypair = &new Crypt_RSA_KeyPair($rsa_attrs, $wrapper_name, $error_handler);
-        if ($keypair->isError()) {
-            return $keypair->getLastError();
-        }
-
-        return $keypair;
-    }
-
-    /**
-     * converts keypair to PEM-encoded string, which can be stroed in 
-     * .pem compatible files, contianing RSA private key.
-     *
-     * @return string PEM-encoded keypair on success, false on error
-     * @access public
-     */
-    function toPEMString()
-    {
-        // store RSA private key attributes into ASN.1 string
-        $str = '';
-        $attr_names = $this->_get_attr_names();
-        $n = sizeof($attr_names);
-        $rsa_attrs = $this->_attrs;
-        for ($i = 0; $i < $n; $i++) {
-            $attr = $attr_names[$i];
-            if (!isset($rsa_attrs[$attr])) {
-                $this->pushError("Cannot find value for ASN.1 attribute [$attr]");
-                return false;
-            }
-            $tmp = $rsa_attrs[$attr];
-            $str .= Crypt_RSA_KeyPair::_ASN1StoreInt($tmp);
-        }
-
-        // prepend $str by ASN.1 SEQUENCE (0x10) header
-        $str = Crypt_RSA_KeyPair::_ASN1Store($str, 0x10, true);
-
-        // encode and format PEM string
-        $str = base64_encode($str);
-        $str = chunk_split($str, 64, "\n");
-        return "-----BEGIN RSA PRIVATE KEY-----\n$str-----END RSA PRIVATE KEY-----\n";
-    }
-
-    /**
-     * Compares keypairs in Crypt_RSA_KeyPair objects $this and $key_pair
-     *
-     * @param Crypt_RSA_KeyPair $key_pair  keypair to compare
-     *
-     * @return bool  true, if keypair stored in $this equal to keypair stored in $key_pair
-     * @access public
-     */
-    function isEqual($key_pair)
-    {
-        $attr_names = $this->_get_attr_names();
-        foreach ($attr_names as $attr) {
-            if ($this->_attrs[$attr] != $key_pair->_attrs[$attr]) {
-                return false;
-            }
-        }
-        return true;
-    }
-}
-
-?>
diff --git a/plugins/OStatus/extlib/Crypt/RSA/Math/BCMath.php b/plugins/OStatus/extlib/Crypt/RSA/Math/BCMath.php
deleted file mode 100644
index 646ff6710..000000000
--- a/plugins/OStatus/extlib/Crypt/RSA/Math/BCMath.php
+++ /dev/null
@@ -1,482 +0,0 @@
-<?php
-/**
- * Crypt_RSA allows to do following operations:
- *     - key pair generation
- *     - encryption and decryption
- *     - signing and sign validation
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category   Encryption
- * @package    Crypt_RSA
- * @author     Alexander Valyalkin <valyala@gmail.com>
- * @copyright  2006 Alexander Valyalkin
- * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version    1.2.0b
- * @link       http://pear.php.net/package/Crypt_RSA
- */
-
-/**
- * Crypt_RSA_Math_BCMath class.
- *
- * Provides set of math functions, which are used by Crypt_RSA package
- * This class is a wrapper for PHP BCMath extension.
- * See http://php.net/manual/en/ref.bc.php for details.
- *
- * @category   Encryption
- * @package    Crypt_RSA
- * @author     Alexander Valyalkin <valyala@gmail.com>
- * @copyright  2005, 2006 Alexander Valyalkin
- * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
- * @link       http://pear.php.net/package/Crypt_RSA
- * @version    @package_version@
- * @access     public
- */
-class Crypt_RSA_Math_BCMath
-{
-    /**
-     * error description
-     *
-     * @var string
-     * @access public
-     */
-    var $errstr = '';
-
-    /**
-     * Performs Miller-Rabin primality test for number $num 
-     * with base $base. Returns true, if $num is strong pseudoprime
-     * by base $base. Else returns false.
-     *
-     * @param string $num
-     * @param string $base
-     * @return bool
-     * @access private
-     */
-    function _millerTest($num, $base)
-    {
-        if (!bccomp($num, '1')) {
-            // 1 is not prime ;)
-            return false;
-        }
-        $tmp = bcsub($num, '1');
-
-        $zero_bits = 0;
-        while (!bccomp(bcmod($tmp, '2'), '0')) {
-            $zero_bits++;
-            $tmp = bcdiv($tmp, '2');
-        }
-
-        $tmp = $this->powmod($base, $tmp, $num);
-        if (!bccomp($tmp, '1')) {
-            // $num is probably prime
-            return true;
-        }
-
-        while ($zero_bits--) {
-            if (!bccomp(bcadd($tmp, '1'), $num)) {
-                // $num is probably prime
-                return true;
-            }
-            $tmp = $this->powmod($tmp, '2', $num);
-        }
-        // $num is composite
-        return false;
-    }
-
-    /**
-     * Crypt_RSA_Math_BCMath constructor.
-     * Checks an existance of PHP BCMath extension.
-     * On failure saves error description in $this->errstr
-     *
-     * @access public
-     */
-    function Crypt_RSA_Math_BCMath()
-    {
-        if (!extension_loaded('bcmath')) {
-            if (!@dl('bcmath.' . PHP_SHLIB_SUFFIX) && !@dl('php_bcmath.' . PHP_SHLIB_SUFFIX)) {
-                // cannot load BCMath extension. Set error string
-                $this->errstr = 'Crypt_RSA package requires the BCMath extension. See http://php.net/manual/en/ref.bc.php for details';
-                return;
-            }
-        }
-    }
-
-    /**
-     * Transforms binary representation of large integer into its native form.
-     * 
-     * Example of transformation:
-     *    $str = "\x12\x34\x56\x78\x90";
-     *    $num = 0x9078563412;
-     *
-     * @param string $str
-     * @return string
-     * @access public
-     */
-    function bin2int($str)
-    {
-        $result = '0';
-        $n = strlen($str);
-        do {
-            $result = bcadd(bcmul($result, '256'), ord($str{--$n}));
-        } while ($n > 0);
-        return $result;
-    }
-
-    /**
-     * Transforms large integer into binary representation.
-     * 
-     * Example of transformation:
-     *    $num = 0x9078563412;
-     *    $str = "\x12\x34\x56\x78\x90";
-     *
-     * @param string $num
-     * @return string
-     * @access public
-     */
-    function int2bin($num)
-    {
-        $result = '';
-        do {
-            $result .= chr(bcmod($num, '256'));
-            $num = bcdiv($num, '256');
-        } while (bccomp($num, '0'));
-        return $result;
-    }
-
-    /**
-     * Calculates pow($num, $pow) (mod $mod)
-     *
-     * @param string $num
-     * @param string $pow
-     * @param string $mod
-     * @return string
-     * @access public
-     */
-    function powmod($num, $pow, $mod)
-    {
-        if (function_exists('bcpowmod')) {
-            // bcpowmod is only available under PHP5
-            return bcpowmod($num, $pow, $mod);
-        }
-
-        // emulate bcpowmod
-        $result = '1';
-        do {
-            if (!bccomp(bcmod($pow, '2'), '1')) {
-                $result = bcmod(bcmul($result, $num), $mod);
-            }
-            $num = bcmod(bcpow($num, '2'), $mod);
-            $pow = bcdiv($pow, '2');
-        } while (bccomp($pow, '0'));
-        return $result;
-    }
-
-    /**
-     * Calculates $num1 * $num2
-     *
-     * @param string $num1
-     * @param string $num2
-     * @return string
-     * @access public
-     */
-    function mul($num1, $num2)
-    {
-        return bcmul($num1, $num2);
-    }
-
-    /**
-     * Calculates $num1 % $num2
-     *
-     * @param string $num1
-     * @param string $num2
-     * @return string
-     * @access public
-     */
-    function mod($num1, $num2)
-    {
-        return bcmod($num1, $num2);
-    }
-
-    /**
-     * Compares abs($num1) to abs($num2).
-     * Returns:
-     *   -1, if abs($num1) < abs($num2)
-     *   0, if abs($num1) == abs($num2)
-     *   1, if abs($num1) > abs($num2)
-     *
-     * @param string $num1
-     * @param string $num2
-     * @return int
-     * @access public
-     */
-    function cmpAbs($num1, $num2)
-    {
-        return bccomp($num1, $num2);
-    }
-
-    /**
-     * Tests $num on primality. Returns true, if $num is strong pseudoprime.
-     * Else returns false.
-     *
-     * @param string $num
-     * @return bool
-     * @access private
-     */
-    function isPrime($num)
-    {
-        static $primes = null;
-        static $primes_cnt = 0;
-        if (is_null($primes)) {
-            // generate all primes up to 10000
-            $primes = array();
-            for ($i = 0; $i < 10000; $i++) {
-                $primes[] = $i;
-            }
-            $primes[0] = $primes[1] = 0;
-            for ($i = 2; $i < 100; $i++) {
-                while (!$primes[$i]) {
-                    $i++;
-                }
-                $j = $i;
-                for ($j += $i; $j < 10000; $j += $i) {
-                    $primes[$j] = 0;
-                }
-            }
-            $j = 0;
-            for ($i = 0; $i < 10000; $i++) {
-                if ($primes[$i]) {
-                    $primes[$j++] = $primes[$i];
-                }
-            }
-            $primes_cnt = $j;
-        }
-
-        // try to divide number by small primes
-        for ($i = 0; $i < $primes_cnt; $i++) {
-            if (bccomp($num, $primes[$i]) <= 0) {
-                // number is prime
-                return true;
-            }
-            if (!bccomp(bcmod($num, $primes[$i]), '0')) {
-                // number divides by $primes[$i]
-                return false;
-            }
-        }
-
-        /*
-            try Miller-Rabin's probable-primality test for first
-            7 primes as bases
-        */
-        for ($i = 0; $i < 7; $i++) {
-            if (!$this->_millerTest($num, $primes[$i])) {
-                // $num is composite
-                return false;
-            }
-        }
-        // $num is strong pseudoprime
-        return true;
-    }
-
-    /**
-     * Generates prime number with length $bits_cnt
-     * using $random_generator as random generator function.
-     *
-     * @param int $bits_cnt
-     * @param string $rnd_generator
-     * @access public
-     */
-    function getPrime($bits_cnt, $random_generator)
-    {
-        $bytes_n = intval($bits_cnt / 8);
-        $bits_n = $bits_cnt % 8;
-        do {
-            $str = '';
-            for ($i = 0; $i < $bytes_n; $i++) {
-                $str .= chr(call_user_func($random_generator) & 0xff);
-            }
-            $n = call_user_func($random_generator) & 0xff;
-            $n |= 0x80;
-            $n >>= 8 - $bits_n;
-            $str .= chr($n);
-            $num = $this->bin2int($str);
-
-            // search for the next closest prime number after [$num]
-            if (!bccomp(bcmod($num, '2'), '0')) {
-                $num = bcadd($num, '1');
-            }
-            while (!$this->isPrime($num)) {
-                $num = bcadd($num, '2');
-            }
-        } while ($this->bitLen($num) != $bits_cnt);
-        return $num;
-    }
-
-    /**
-     * Calculates $num - 1
-     *
-     * @param string $num
-     * @return string
-     * @access public
-     */
-    function dec($num)
-    {
-        return bcsub($num, '1');
-    }
-
-    /**
-     * Returns true, if $num is equal to one. Else returns false
-     *
-     * @param string $num
-     * @return bool
-     * @access public
-     */
-    function isOne($num)
-    {
-        return !bccomp($num, '1');
-    }
-
-    /**
-     * Finds greatest common divider (GCD) of $num1 and $num2
-     *
-     * @param string $num1
-     * @param string $num2
-     * @return string
-     * @access public
-     */
-    function GCD($num1, $num2)
-    {
-        do {
-            $tmp = bcmod($num1, $num2);
-            $num1 = $num2;
-            $num2 = $tmp;
-        } while (bccomp($num2, '0'));
-        return $num1;
-    }
-
-    /**
-     * Finds inverse number $inv for $num by modulus $mod, such as:
-     *     $inv * $num = 1 (mod $mod)
-     *
-     * @param string $num
-     * @param string $mod
-     * @return string
-     * @access public
-     */
-    function invmod($num, $mod)
-    {
-        $x = '1';
-        $y = '0';
-        $num1 = $mod;
-        do {
-            $tmp = bcmod($num, $num1);
-            $q = bcdiv($num, $num1);
-            $num = $num1;
-            $num1 = $tmp;
-
-            $tmp = bcsub($x, bcmul($y, $q));
-            $x = $y;
-            $y = $tmp;
-        } while (bccomp($num1, '0'));
-        if (bccomp($x, '0') < 0) {
-            $x = bcadd($x, $mod);
-        }
-        return $x;
-    }
-
-    /**
-     * Returns bit length of number $num
-     *
-     * @param string $num
-     * @return int
-     * @access public
-     */
-    function bitLen($num)
-    {
-        $tmp = $this->int2bin($num);
-        $bit_len = strlen($tmp) * 8;
-        $tmp = ord($tmp{strlen($tmp) - 1});
-        if (!$tmp) {
-            $bit_len -= 8;
-        }
-        else {
-            while (!($tmp & 0x80)) {
-                $bit_len--;
-                $tmp <<= 1;
-            }
-        }
-        return $bit_len;
-    }
-
-    /**
-     * Calculates bitwise or of $num1 and $num2,
-     * starting from bit $start_pos for number $num1
-     *
-     * @param string $num1
-     * @param string $num2
-     * @param int $start_pos
-     * @return string
-     * @access public
-     */
-    function bitOr($num1, $num2, $start_pos)
-    {
-        $start_byte = intval($start_pos / 8);
-        $start_bit = $start_pos % 8;
-        $tmp1 = $this->int2bin($num1);
-
-        $num2 = bcmul($num2, 1 << $start_bit);
-        $tmp2 = $this->int2bin($num2);
-        if ($start_byte < strlen($tmp1)) {
-            $tmp2 |= substr($tmp1, $start_byte);
-            $tmp1 = substr($tmp1, 0, $start_byte) . $tmp2;
-        }
-        else {
-            $tmp1 = str_pad($tmp1, $start_byte, "\0") . $tmp2;
-        }
-        return $this->bin2int($tmp1);
-    }
-
-    /**
-     * Returns part of number $num, starting at bit
-     * position $start with length $length
-     *
-     * @param string $num
-     * @param int start
-     * @param int length
-     * @return string
-     * @access public
-     */
-    function subint($num, $start, $length)
-    {
-        $start_byte = intval($start / 8);
-        $start_bit = $start % 8;
-        $byte_length = intval($length / 8);
-        $bit_length = $length % 8;
-        if ($bit_length) {
-            $byte_length++;
-        }
-        $num = bcdiv($num, 1 << $start_bit);
-        $tmp = substr($this->int2bin($num), $start_byte, $byte_length);
-        $tmp = str_pad($tmp, $byte_length, "\0");
-        $tmp = substr_replace($tmp, $tmp{$byte_length - 1} & chr(0xff >> (8 - $bit_length)), $byte_length - 1, 1);
-        return $this->bin2int($tmp);
-    }
-
-    /**
-     * Returns name of current wrapper
-     *
-     * @return string name of current wrapper
-     * @access public
-     */
-    function getWrapperName()
-    {
-        return 'BCMath';
-    }
-}
-
-?>
\ No newline at end of file
diff --git a/plugins/OStatus/extlib/Crypt/RSA/Math/BigInt.php b/plugins/OStatus/extlib/Crypt/RSA/Math/BigInt.php
deleted file mode 100644
index b7ac24cb6..000000000
--- a/plugins/OStatus/extlib/Crypt/RSA/Math/BigInt.php
+++ /dev/null
@@ -1,313 +0,0 @@
-<?php
-/**
- * Crypt_RSA allows to do following operations:
- *     - key pair generation
- *     - encryption and decryption
- *     - signing and sign validation
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category   Encryption
- * @package    Crypt_RSA
- * @author     Alexander Valyalkin <valyala@gmail.com>
- * @copyright  2005, 2006 Alexander Valyalkin
- * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version    1.2.0b
- * @link       http://pear.php.net/package/Crypt_RSA
- */
-
-/**
- * Crypt_RSA_Math_BigInt class.
- *
- * Provides set of math functions, which are used by Crypt_RSA package
- * This class is a wrapper for big_int PECL extension,
- * which could be loaded from http://pecl.php.net/packages/big_int
- *
- * @category   Encryption
- * @package    Crypt_RSA
- * @author     Alexander Valyalkin <valyala@gmail.com>
- * @copyright  2005, 2006 Alexander Valyalkin
- * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
- * @link       http://pear.php.net/package/Crypt_RSA
- * @version    @package_version@
- * @access     public
- */
-class Crypt_RSA_Math_BigInt
-{
-    /**
-     * error description
-     *
-     * @var string
-     * @access public
-     */
-    var $errstr = '';
-
-    /**
-     * Crypt_RSA_Math_BigInt constructor.
-     * Checks an existance of big_int PECL math package.
-     * This package is available at http://pecl.php.net/packages/big_int
-     * On failure saves error description in $this->errstr
-     *
-     * @access public
-     */
-    function Crypt_RSA_Math_BigInt()
-    {
-        if (!extension_loaded('big_int')) {
-            if (!@dl('big_int.' . PHP_SHLIB_SUFFIX) && !@dl('php_big_int.' . PHP_SHLIB_SUFFIX)) {
-                // cannot load big_int extension
-                $this->errstr = 'Crypt_RSA package requires big_int PECL package. ' .
-                     'It is available at http://pecl.php.net/packages/big_int';
-                return;
-            }
-        }
-
-        // check version of big_int extension ( Crypt_RSA requires version 1.0.2 and higher )
-        if (!in_array('bi_info', get_extension_funcs('big_int'))) {
-            // there is no bi_info() function in versions, older than 1.0.2
-            $this->errstr = 'Crypt_RSA package requires big_int package version 1.0.2 and higher';
-        }
-    }
-
-    /**
-     * Transforms binary representation of large integer into its native form.
-     * 
-     * Example of transformation:
-     *    $str = "\x12\x34\x56\x78\x90";
-     *    $num = 0x9078563412;
-     *
-     * @param string $str
-     * @return big_int resource
-     * @access public
-     */
-    function bin2int($str)
-    {
-        return bi_unserialize($str);
-    }
-
-    /**
-     * Transforms large integer into binary representation.
-     * 
-     * Example of transformation:
-     *    $num = 0x9078563412;
-     *    $str = "\x12\x34\x56\x78\x90";
-     *
-     * @param big_int resource $num
-     * @return string
-     * @access public
-     */
-    function int2bin($num)
-    {
-        return bi_serialize($num);
-    }
-
-    /**
-     * Calculates pow($num, $pow) (mod $mod)
-     *
-     * @param big_int resource $num
-     * @param big_int resource $pow
-     * @param big_int resource $mod
-     * @return big_int resource
-     * @access public
-     */
-    function powmod($num, $pow, $mod)
-    {
-        return bi_powmod($num, $pow, $mod);
-    }
-
-    /**
-     * Calculates $num1 * $num2
-     *
-     * @param big_int resource $num1
-     * @param big_int resource $num2
-     * @return big_int resource
-     * @access public
-     */
-    function mul($num1, $num2)
-    {
-        return bi_mul($num1, $num2);
-    }
-
-    /**
-     * Calculates $num1 % $num2
-     *
-     * @param string $num1
-     * @param string $num2
-     * @return string
-     * @access public
-     */
-    function mod($num1, $num2)
-    {
-        return bi_mod($num1, $num2);
-    }
-
-    /**
-     * Compares abs($num1) to abs($num2).
-     * Returns:
-     *   -1, if abs($num1) < abs($num2)
-     *   0, if abs($num1) == abs($num2)
-     *   1, if abs($num1) > abs($num2)
-     *
-     * @param big_int resource $num1
-     * @param big_int resource $num2
-     * @return int
-     * @access public
-     */
-    function cmpAbs($num1, $num2)
-    {
-        return bi_cmp_abs($num1, $num2);
-    }
-
-    /**
-     * Tests $num on primality. Returns true, if $num is strong pseudoprime.
-     * Else returns false.
-     *
-     * @param string $num
-     * @return bool
-     * @access private
-     */
-    function isPrime($num)
-    {
-        return bi_is_prime($num) ? true : false;
-    }
-
-    /**
-     * Generates prime number with length $bits_cnt
-     * using $random_generator as random generator function.
-     *
-     * @param int $bits_cnt
-     * @param string $rnd_generator
-     * @access public
-     */
-    function getPrime($bits_cnt, $random_generator)
-    {
-        $bytes_n = intval($bits_cnt / 8);
-        $bits_n = $bits_cnt % 8;
-        do {
-            $str = '';
-            for ($i = 0; $i < $bytes_n; $i++) {
-                $str .= chr(call_user_func($random_generator) & 0xff);
-            }
-            $n = call_user_func($random_generator) & 0xff;
-            $n |= 0x80;
-            $n >>= 8 - $bits_n;
-            $str .= chr($n);
-            $num = $this->bin2int($str);
-
-            // search for the next closest prime number after [$num]
-            $num = bi_next_prime($num);
-        } while ($this->bitLen($num) != $bits_cnt);
-        return $num;
-    }
-
-    /**
-     * Calculates $num - 1
-     *
-     * @param big_int resource $num
-     * @return big_int resource
-     * @access public
-     */
-    function dec($num)
-    {
-        return bi_dec($num);
-    }
-
-    /**
-     * Returns true, if $num is equal to 1. Else returns false
-     *
-     * @param big_int resource $num
-     * @return bool
-     * @access public
-     */
-    function isOne($num)
-    {
-        return bi_is_one($num);
-    }
-
-    /**
-     * Finds greatest common divider (GCD) of $num1 and $num2
-     *
-     * @param big_int resource $num1
-     * @param big_int resource $num2
-     * @return big_int resource
-     * @access public
-     */
-    function GCD($num1, $num2)
-    {
-        return bi_gcd($num1, $num2);
-    }
-
-    /**
-     * Finds inverse number $inv for $num by modulus $mod, such as:
-     *     $inv * $num = 1 (mod $mod)
-     *
-     * @param big_int resource $num
-     * @param big_int resource $mod
-     * @return big_int resource
-     * @access public
-     */
-    function invmod($num, $mod)
-    {
-        return bi_invmod($num, $mod);
-    }
-
-    /**
-     * Returns bit length of number $num
-     *
-     * @param big_int resource $num
-     * @return int
-     * @access public
-     */
-    function bitLen($num)
-    {
-        return bi_bit_len($num);
-    }
-
-    /**
-     * Calculates bitwise or of $num1 and $num2,
-     * starting from bit $start_pos for number $num1
-     *
-     * @param big_int resource $num1
-     * @param big_int resource $num2
-     * @param int $start_pos
-     * @return big_int resource
-     * @access public
-     */
-    function bitOr($num1, $num2, $start_pos)
-    {
-        return bi_or($num1, $num2, $start_pos);
-    }
-
-    /**
-     * Returns part of number $num, starting at bit
-     * position $start with length $length
-     *
-     * @param big_int resource $num
-     * @param int start
-     * @param int length
-     * @return big_int resource
-     * @access public
-     */
-    function subint($num, $start, $length)
-    {
-        return bi_subint($num, $start, $length);
-    }
-
-    /**
-     * Returns name of current wrapper
-     *
-     * @return string name of current wrapper
-     * @access public
-     */
-    function getWrapperName()
-    {
-        return 'BigInt';
-    }
-}
-
-?>
\ No newline at end of file
diff --git a/plugins/OStatus/extlib/Crypt/RSA/Math/GMP.php b/plugins/OStatus/extlib/Crypt/RSA/Math/GMP.php
deleted file mode 100644
index 54e4c34fc..000000000
--- a/plugins/OStatus/extlib/Crypt/RSA/Math/GMP.php
+++ /dev/null
@@ -1,361 +0,0 @@
-<?php
-/**
- * Crypt_RSA allows to do following operations:
- *     - key pair generation
- *     - encryption and decryption
- *     - signing and sign validation
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category   Encryption
- * @package    Crypt_RSA
- * @author     Alexander Valyalkin <valyala@gmail.com>
- * @copyright  2005, 2006 Alexander Valyalkin
- * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version    1.2.0b
- * @link       http://pear.php.net/package/Crypt_RSA
- */
-
-/**
- * Crypt_RSA_Math_GMP class.
- *
- * Provides set of math functions, which are used by Crypt_RSA package
- * This class is a wrapper for PHP GMP extension.
- * See http://php.net/gmp for details.
- *
- * @category   Encryption
- * @package    Crypt_RSA
- * @author     Alexander Valyalkin <valyala@gmail.com>
- * @copyright  2005, 2006 Alexander Valyalkin
- * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
- * @link       http://pear.php.net/package/Crypt_RSA
- * @version    @package_version@
- * @access     public
- */
-class Crypt_RSA_Math_GMP
-{
-    /**
-     * error description
-     *
-     * @var string
-     * @access public
-     */
-    var $errstr = '';
-
-    /**
-     * Crypt_RSA_Math_GMP constructor.
-     * Checks an existance of PHP GMP package.
-     * See http://php.net/gmp for details.
-     *
-     * On failure saves error description in $this->errstr
-     *
-     * @access public
-     */
-    function Crypt_RSA_Math_GMP()
-    {
-        if (!extension_loaded('gmp')) {
-            if (!@dl('gmp.' . PHP_SHLIB_SUFFIX) && !@dl('php_gmp.' . PHP_SHLIB_SUFFIX)) {
-                // cannot load GMP extension
-                $this->errstr = 'Crypt_RSA package requires PHP GMP package. ' .
-                     'See http://php.net/gmp for details';
-                return;
-            }
-        }
-    }
-
-    /**
-     * Transforms binary representation of large integer into its native form.
-     * 
-     * Example of transformation:
-     *    $str = "\x12\x34\x56\x78\x90";
-     *    $num = 0x9078563412;
-     *
-     * @param string $str
-     * @return gmp resource
-     * @access public
-     */
-    function bin2int($str)
-    {
-        $result = 0;
-        $n = strlen($str);
-        do {
-            // dirty hack: GMP returns FALSE, when second argument equals to int(0).
-            // so, it must be converted to string '0'
-            $result = gmp_add(gmp_mul($result, 256), strval(ord($str{--$n})));
-        } while ($n > 0);
-        return $result;
-    }
-
-    /**
-     * Transforms large integer into binary representation.
-     * 
-     * Example of transformation:
-     *    $num = 0x9078563412;
-     *    $str = "\x12\x34\x56\x78\x90";
-     *
-     * @param gmp resource $num
-     * @return string
-     * @access public
-     */
-    function int2bin($num)
-    {
-        $result = '';
-        do {
-            $result .= chr(gmp_intval(gmp_mod($num, 256)));
-            $num = gmp_div($num, 256);
-        } while (gmp_cmp($num, 0));
-        return $result;
-    }
-
-    /**
-     * Calculates pow($num, $pow) (mod $mod)
-     *
-     * @param gmp resource $num
-     * @param gmp resource $pow
-     * @param gmp resource $mod
-     * @return gmp resource
-     * @access public
-     */
-    function powmod($num, $pow, $mod)
-    {
-        return gmp_powm($num, $pow, $mod);
-    }
-
-    /**
-     * Calculates $num1 * $num2
-     *
-     * @param gmp resource $num1
-     * @param gmp resource $num2
-     * @return gmp resource
-     * @access public
-     */
-    function mul($num1, $num2)
-    {
-        return gmp_mul($num1, $num2);
-    }
-
-    /**
-     * Calculates $num1 % $num2
-     *
-     * @param string $num1
-     * @param string $num2
-     * @return string
-     * @access public
-     */
-    function mod($num1, $num2)
-    {
-        return gmp_mod($num1, $num2);
-    }
-
-    /**
-     * Compares abs($num1) to abs($num2).
-     * Returns:
-     *   -1, if abs($num1) < abs($num2)
-     *   0, if abs($num1) == abs($num2)
-     *   1, if abs($num1) > abs($num2)
-     *
-     * @param gmp resource $num1
-     * @param gmp resource $num2
-     * @return int
-     * @access public
-     */
-    function cmpAbs($num1, $num2)
-    {
-        return gmp_cmp($num1, $num2);
-    }
-
-    /**
-     * Tests $num on primality. Returns true, if $num is strong pseudoprime.
-     * Else returns false.
-     *
-     * @param string $num
-     * @return bool
-     * @access private
-     */
-    function isPrime($num)
-    {
-        return gmp_prob_prime($num) ? true : false;
-    }
-
-    /**
-     * Generates prime number with length $bits_cnt
-     * using $random_generator as random generator function.
-     *
-     * @param int $bits_cnt
-     * @param string $rnd_generator
-     * @access public
-     */
-    function getPrime($bits_cnt, $random_generator)
-    {
-        $bytes_n = intval($bits_cnt / 8);
-        $bits_n = $bits_cnt % 8;
-        do {
-            $str = '';
-            for ($i = 0; $i < $bytes_n; $i++) {
-                $str .= chr(call_user_func($random_generator) & 0xff);
-            }
-            $n = call_user_func($random_generator) & 0xff;
-            $n |= 0x80;
-            $n >>= 8 - $bits_n;
-            $str .= chr($n);
-            $num = $this->bin2int($str);
-
-            // search for the next closest prime number after [$num]
-            if (!gmp_cmp(gmp_mod($num, '2'), '0')) {
-                $num = gmp_add($num, '1');
-            }
-            while (!gmp_prob_prime($num)) {
-                $num = gmp_add($num, '2');
-            }
-        } while ($this->bitLen($num) != $bits_cnt);
-        return $num;
-    }
-
-    /**
-     * Calculates $num - 1
-     *
-     * @param gmp resource $num
-     * @return gmp resource
-     * @access public
-     */
-    function dec($num)
-    {
-        return gmp_sub($num, 1);
-    }
-
-    /**
-     * Returns true, if $num is equal to one. Else returns false
-     *
-     * @param gmp resource $num
-     * @return bool
-     * @access public
-     */
-    function isOne($num)
-    {
-        return !gmp_cmp($num, 1);
-    }
-
-    /**
-     * Finds greatest common divider (GCD) of $num1 and $num2
-     *
-     * @param gmp resource $num1
-     * @param gmp resource $num2
-     * @return gmp resource
-     * @access public
-     */
-    function GCD($num1, $num2)
-    {
-        return gmp_gcd($num1, $num2);
-    }
-
-    /**
-     * Finds inverse number $inv for $num by modulus $mod, such as:
-     *     $inv * $num = 1 (mod $mod)
-     *
-     * @param gmp resource $num
-     * @param gmp resource $mod
-     * @return gmp resource
-     * @access public
-     */
-    function invmod($num, $mod)
-    {
-        return gmp_invert($num, $mod);
-    }
-
-    /**
-     * Returns bit length of number $num
-     *
-     * @param gmp resource $num
-     * @return int
-     * @access public
-     */
-    function bitLen($num)
-    {
-        $tmp = $this->int2bin($num);
-        $bit_len = strlen($tmp) * 8;
-        $tmp = ord($tmp{strlen($tmp) - 1});
-        if (!$tmp) {
-            $bit_len -= 8;
-        }
-        else {
-            while (!($tmp & 0x80)) {
-                $bit_len--;
-                $tmp <<= 1;
-            }
-        }
-        return $bit_len;
-    }
-
-    /**
-     * Calculates bitwise or of $num1 and $num2,
-     * starting from bit $start_pos for number $num1
-     *
-     * @param gmp resource $num1
-     * @param gmp resource $num2
-     * @param int $start_pos
-     * @return gmp resource
-     * @access public
-     */
-    function bitOr($num1, $num2, $start_pos)
-    {
-        $start_byte = intval($start_pos / 8);
-        $start_bit = $start_pos % 8;
-        $tmp1 = $this->int2bin($num1);
-
-        $num2 = gmp_mul($num2, 1 << $start_bit);
-        $tmp2 = $this->int2bin($num2);
-        if ($start_byte < strlen($tmp1)) {
-            $tmp2 |= substr($tmp1, $start_byte);
-            $tmp1 = substr($tmp1, 0, $start_byte) . $tmp2;
-        }
-        else {
-            $tmp1 = str_pad($tmp1, $start_byte, "\0") . $tmp2;
-        }
-        return $this->bin2int($tmp1);
-    }
-
-    /**
-     * Returns part of number $num, starting at bit
-     * position $start with length $length
-     *
-     * @param gmp resource $num
-     * @param int start
-     * @param int length
-     * @return gmp resource
-     * @access public
-     */
-    function subint($num, $start, $length)
-    {
-        $start_byte = intval($start / 8);
-        $start_bit = $start % 8;
-        $byte_length = intval($length / 8);
-        $bit_length = $length % 8;
-        if ($bit_length) {
-            $byte_length++;
-        }
-        $num = gmp_div($num, 1 << $start_bit);
-        $tmp = substr($this->int2bin($num), $start_byte, $byte_length);
-        $tmp = str_pad($tmp, $byte_length, "\0");
-        $tmp = substr_replace($tmp, $tmp{$byte_length - 1} & chr(0xff >> (8 - $bit_length)), $byte_length - 1, 1);
-        return $this->bin2int($tmp);
-    }
-
-    /**
-     * Returns name of current wrapper
-     *
-     * @return string name of current wrapper
-     * @access public
-     */
-    function getWrapperName()
-    {
-        return 'GMP';
-    }
-}
-
-?>
\ No newline at end of file
diff --git a/plugins/OStatus/extlib/Crypt/RSA/MathLoader.php b/plugins/OStatus/extlib/Crypt/RSA/MathLoader.php
deleted file mode 100644
index de6c94642..000000000
--- a/plugins/OStatus/extlib/Crypt/RSA/MathLoader.php
+++ /dev/null
@@ -1,135 +0,0 @@
-<?php
-/**
- * Crypt_RSA allows to do following operations:
- *     - key pair generation
- *     - encryption and decryption
- *     - signing and sign validation
- *
- * PHP versions 4 and 5
- *
- * LICENSE: This source file is subject to version 3.0 of the PHP license
- * that is available through the world-wide-web at the following URI:
- * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
- * the PHP License and are unable to obtain it through the web, please
- * send a note to license@php.net so we can mail you a copy immediately.
- *
- * @category  Encryption
- * @package   Crypt_RSA
- * @author    Alexander Valyalkin <valyala@gmail.com>
- * @copyright Alexander Valyalkin 2005
- * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version   CVS: $Id: MathLoader.php,v 1.5 2009/01/05 08:30:29 clockwerx Exp $
- * @link      http://pear.php.net/package/Crypt_RSA
- */
-
-/**
- * RSA error handling facilities
- */
-require_once 'Crypt/RSA/ErrorHandler.php';
-
-/**
- * Crypt_RSA_MathLoader class.
- *
- * Provides static function:
- *  - loadWrapper($wrapper_name) - loads RSA math wrapper with name $wrapper_name
- *                                 or most suitable wrapper if $wrapper_name == 'default'
- *
- * Example usage:
- *    // load BigInt wrapper
- *    $big_int_wrapper = Crypt_RSA_MathLoader::loadWrapper('BigInt');
- * 
- *    // load BCMath wrapper
- *    $bcmath_wrapper = Crypt_RSA_MathLoader::loadWrapper('BCMath');
- * 
- *    // load the most suitable wrapper
- *    $bcmath_wrapper = Crypt_RSA_MathLoader::loadWrapper();
- * 
- * @category  Encryption
- * @package   Crypt_RSA
- * @author    Alexander Valyalkin <valyala@gmail.com>
- * @copyright Alexander Valyalkin 2005
- * @license   http://www.php.net/license/3_0.txt  PHP License 3.0
- * @version   Release: @package_version@
- * @link      http://pear.php.net/package/Crypt_RSA
- * @access    public
- */
-class Crypt_RSA_MathLoader
-{
-    /**
-     * Loads RSA math wrapper with name $wrapper_name.
-     * Implemented wrappers can be found at Crypt/RSA/Math folder.
-     * Read docs/Crypt_RSA/docs/math_wrappers.txt for details
-     *
-     * This is a static function:
-     *    // load BigInt wrapper
-     *    $big_int_wrapper = &Crypt_RSA_MathLoader::loadWrapper('BigInt');
-     *
-     *    // load BCMath wrapper
-     *    $bcmath_wrapper = &Crypt_RSA_MathLoader::loadWrapper('BCMath');
-     *
-     * @param string $wrapper_name Name of wrapper
-     *
-     * @return object
-     *         Reference to object of wrapper with name $wrapper_name on success
-     *         or PEAR_Error object on error
-     *
-     * @access public
-     */
-    function loadWrapper($wrapper_name = 'default')
-    {
-        static $math_objects = array();
-        // ordered by performance. GMP is the fastest math library, BCMath - the slowest.
-        static $math_wrappers = array('GMP', 'BigInt', 'BCMath',);
-
-        if (isset($math_objects[$wrapper_name])) {
-            /*
-                wrapper with name $wrapper_name is already loaded and created.
-                Return reference to existing copy of wrapper
-            */
-            return $math_objects[$wrapper_name];
-        }
-
-        $err_handler = new Crypt_RSA_ErrorHandler();
-
-        if ($wrapper_name === 'default') {
-            // try to load the most suitable wrapper
-            $n = sizeof($math_wrappers);
-            for ($i = 0; $i < $n; $i++) {
-                $obj = Crypt_RSA_MathLoader::loadWrapper($math_wrappers[$i]);
-                if (!$err_handler->isError($obj)) {
-                    // wrapper for $math_wrappers[$i] successfully loaded
-                    // register it as default wrapper and return reference to it
-                    return $math_objects['default'] = $obj;
-                }
-            }
-            // can't load any wrapper
-            $err_handler->pushError("can't load any wrapper for existing math libraries", CRYPT_RSA_ERROR_NO_WRAPPERS);
-            return $err_handler->getLastError();
-        }
-
-        $class_name = 'Crypt_RSA_Math_' . $wrapper_name;
-        $class_filename = dirname(__FILE__) . '/Math/' . $wrapper_name . '.php';
-
-        if (!is_file($class_filename)) {
-            $err_handler->pushError("can't find file [{$class_filename}] for RSA math wrapper [{$wrapper_name}]", CRYPT_RSA_ERROR_NO_FILE);
-            return $err_handler->getLastError();
-        }
-
-        include_once $class_filename;
-        if (!class_exists($class_name)) {
-            $err_handler->pushError("can't find class [{$class_name}] in file [{$class_filename}]", CRYPT_RSA_ERROR_NO_CLASS);
-            return $err_handler->getLastError();
-        }
-
-        // create and return wrapper object on success or PEAR_Error object on error
-        $obj = new $class_name;
-        if ($obj->errstr) {
-            // cannot load required extension for math wrapper
-            $err_handler->pushError($obj->errstr, CRYPT_RSA_ERROR_NO_EXT);
-            return $err_handler->getLastError();
-        }
-        return $math_objects[$wrapper_name] = $obj;
-    }
-}
-
-?>