mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
22095dae6c
Backported from 3.0, cc423c38fb
.
241 lines
6.4 KiB
PHP
241 lines
6.4 KiB
PHP
<?php
|
|
/**
|
|
* Allows pluggable password encryption.
|
|
* By default, this might be PHP's integrated sha1()
|
|
* function, but could also be more sophisticated to facilitate
|
|
* password migrations from other systems.
|
|
* Use {@link register()} to add new implementations.
|
|
*
|
|
* Used in {@link Security::encrypt_password()}.
|
|
*
|
|
* @package sapphire
|
|
* @subpackage security
|
|
*/
|
|
abstract class PasswordEncryptor {
|
|
|
|
/**
|
|
* @var array
|
|
*/
|
|
protected static $encryptors = array();
|
|
|
|
/**
|
|
* @return Array Map of encryptor code to the used class.
|
|
*/
|
|
static function get_encryptors() {
|
|
return self::$encryptors;
|
|
}
|
|
|
|
/**
|
|
* Add a new encryptor implementation.
|
|
*
|
|
* Note: Due to portability concerns, its not advisable to
|
|
* override an existing $code mapping with different behaviour.
|
|
*
|
|
* @param String $code This value will be stored stored in the
|
|
* {@link Member->PasswordEncryption} property.
|
|
* @param String $class Classname of a {@link PasswordEncryptor} subclass
|
|
*/
|
|
static function register($code, $class) {
|
|
self::$encryptors[$code] = $class;
|
|
}
|
|
|
|
/**
|
|
* @param String $code Unique lookup.
|
|
*/
|
|
static function unregister($code) {
|
|
if(isset(self::$encryptors[$code])) unset(self::$encryptors[$code]);
|
|
}
|
|
|
|
/**
|
|
* @param String $algorithm
|
|
* @return PasswordEncryptor|Boolean Returns FALSE if class was not found
|
|
*/
|
|
static function create_for_algorithm($algorithm) {
|
|
if(!isset(self::$encryptors[$algorithm])) {
|
|
throw new PasswordEncryptor_NotFoundException(
|
|
sprintf('No implementation found for "%s"', $algorithm)
|
|
);
|
|
}
|
|
|
|
$classWithArgs = self::$encryptors[$algorithm];
|
|
$class = (($p = strpos($classWithArgs, '(')) !== false) ? substr($classWithArgs, 0, $p) : $classWithArgs;
|
|
if(!class_exists($class)) {
|
|
throw new PasswordEncryptor_NotFoundException(
|
|
sprintf('No class found for "%s"', $class)
|
|
);
|
|
}
|
|
|
|
return eval("return new $classWithArgs;");
|
|
}
|
|
|
|
/**
|
|
* Return a string value stored in the {@link Member->Password} property.
|
|
* The password should be hashed with {@link salt()} if applicable.
|
|
*
|
|
* @param String $password Cleartext password to be hashed
|
|
* @param String $salt (Optional)
|
|
* @param Member $member (Optional)
|
|
* @return String Maximum of 512 characters.
|
|
*/
|
|
abstract function encrypt($password, $salt = null, $member = null);
|
|
|
|
/**
|
|
* Return a string value stored in the {@link Member->Salt} property.
|
|
* Note: Only used when {@link Security::$useSalt} is TRUE.
|
|
*
|
|
* @uses RandomGenerator
|
|
*
|
|
* @param String $password Cleartext password
|
|
* @param Member $member (Optional)
|
|
* @return String Maximum of 50 characters
|
|
*/
|
|
function salt($password, $member = null) {
|
|
$generator = new RandomGenerator();
|
|
return substr($generator->randomToken('sha1'), 0, 50);
|
|
}
|
|
|
|
/**
|
|
* This usually just returns a strict string comparison,
|
|
* but is necessary for {@link PasswordEncryptor_LegacyPHPHash}.
|
|
*
|
|
* @param String $hash1
|
|
* @param String $hash2
|
|
* @return boolean
|
|
*/
|
|
function compare($hash1, $hash2) {
|
|
return ($hash1 === $hash2);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* This is the default class used for built-in hash types in PHP.
|
|
* Please note that the implemented algorithms depend on the PHP
|
|
* distribution and architecture.
|
|
*
|
|
* @package sapphire
|
|
* @subpackage security
|
|
*/
|
|
class PasswordEncryptor_PHPHash extends PasswordEncryptor {
|
|
|
|
protected $algorithm = 'sha1';
|
|
|
|
/**
|
|
* @param String $algorithm A PHP built-in hashing algorithm as defined by hash_algos()
|
|
*/
|
|
function __construct($algorithm) {
|
|
if(!in_array($algorithm, hash_algos())) {
|
|
throw new Exception(
|
|
sprintf('Hash algorithm "%s" not found in hash_algos()', $algorithm)
|
|
);
|
|
}
|
|
|
|
$this->algorithm = $algorithm;
|
|
}
|
|
|
|
/**
|
|
* @return string
|
|
*/
|
|
function getAlgorithm() {
|
|
return $this->algorithm;
|
|
}
|
|
|
|
function encrypt($password, $salt = null, $member = null) {
|
|
if(function_exists('hash')) {
|
|
// Available in PHP 5.1+ only
|
|
return hash($this->algorithm, $password . $salt);
|
|
} else {
|
|
// Fallback to global built-in methods
|
|
return call_user_func($this->algorithm, $password . $salt);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Legacy implementation for SilverStripe 2.1 - 2.3,
|
|
* which had a design flaw in password hashing that caused
|
|
* the hashes to differ between architectures due to
|
|
* floating point precision problems in base_convert().
|
|
* See http://open.silverstripe.org/ticket/3004
|
|
*
|
|
* @package sapphire
|
|
* @subpackage security
|
|
*/
|
|
class PasswordEncryptor_LegacyPHPHash extends PasswordEncryptor_PHPHash {
|
|
function encrypt($password, $salt = null, $member = null) {
|
|
$password = parent::encrypt($password, $salt, $member);
|
|
|
|
// Legacy fix: This shortening logic is producing unpredictable results.
|
|
//
|
|
// Convert the base of the hexadecimal password to 36 to make it shorter
|
|
// In that way we can store also a SHA256 encrypted password in just 64
|
|
// letters.
|
|
return substr(base_convert($password, 16, 36), 0, 64);
|
|
}
|
|
|
|
function compare($hash1, $hash2) {
|
|
// Due to flawed base_convert() floating poing precision,
|
|
// only the first 10 characters are consistently useful for comparisons.
|
|
return (substr($hash1, 0, 10) === substr($hash2, 0, 10));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Uses MySQL's PASSWORD encryption. Requires an active DB connection.
|
|
*
|
|
* @package sapphire
|
|
* @subpackage security
|
|
*/
|
|
class PasswordEncryptor_MySQLPassword extends PasswordEncryptor {
|
|
function encrypt($password, $salt = null, $member = null) {
|
|
return DB::query(
|
|
sprintf("SELECT PASSWORD('%s')", Convert::raw2sql($password))
|
|
)->value();
|
|
}
|
|
|
|
function salt($password, $member = null) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Uses MySQL's OLD_PASSWORD encyrption. Requires an active DB connection.
|
|
*
|
|
* @package sapphire
|
|
* @subpackage security
|
|
*/
|
|
class PasswordEncryptor_MySQLOldPassword extends PasswordEncryptor {
|
|
function encrypt($password, $salt = null, $member = null) {
|
|
return DB::query(
|
|
sprintf("SELECT OLD_PASSWORD('%s')", Convert::raw2sql($password))
|
|
)->value();
|
|
}
|
|
|
|
function salt($password, $member = null) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Cleartext passwords (used in SilverStripe 2.1).
|
|
* Also used when Security::$encryptPasswords is set to FALSE.
|
|
* Not recommended.
|
|
*
|
|
* @package sapphire
|
|
* @subpackage security
|
|
*/
|
|
class PasswordEncryptor_None extends PasswordEncryptor {
|
|
function encrypt($password, $salt = null, $member = null) {
|
|
return $password;
|
|
}
|
|
|
|
function salt($password, $member = null) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @package sapphire
|
|
* @subpackage security
|
|
*/
|
|
class PasswordEncryptor_NotFoundException extends Exception {}
|