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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* 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 1.0.0
* @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($error) - pushes $error into the error list
* - setErrorHandler($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
* @link http://pear.php.net/package/Crypt_RSA
* @version @package_version@
* @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 $_error_handler = '';
/**
* Returns true if list of errors is not empty, else returns false
*
* @return bool true, if list of errors is not empty, else false
* @access public
*/
function isError()
{
return sizeof($this->_errors) > 0;
}
/**
* 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 object $error error object of PEAR_Error class
* @return bool true on success, false on error
* @access public
*/
function pushError($error)
{
if (!PEAR::isError($error)) {
// $error must be a PEAR_Error object
return false;
}
$this->_errors[] = $error;
if ($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;
}
}
?>
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