X-Git-Url: https://git.mxchange.org/?p=core.git;a=blobdiff_plain;f=inc%2Fclasses%2Fmain%2Fcrypto%2Fclass_CryptoHelper.php;h=95e31175644c74af361b2a9461969e4868160d0e;hp=34480b49343afd8e52472a48688a13b5a59c074b;hb=84e2207412d3c6ea9f940a83b2cdd4503509808a;hpb=b9c18d6c24e3be4393bf41005aa4e428a0ea3218

diff --git a/inc/classes/main/crypto/class_CryptoHelper.php b/inc/classes/main/crypto/class_CryptoHelper.php
index 34480b49..95e31175 100644
--- a/inc/classes/main/crypto/class_CryptoHelper.php
+++ b/inc/classes/main/crypto/class_CryptoHelper.php
@@ -4,7 +4,7 @@
  *
  * @author		Roland Haeder <webmaster@ship-simu.org>
  * @version		0.0.0
- * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009 Core Developer Team
+ * @copyright	Copyright (c) 2007, 2008 Roland Haeder, 2009, 2010 Core Developer Team
  * @license		GNU GPL 3.0 or any newer version
  * @link		http://www.ship-simu.org
  *
@@ -37,14 +37,14 @@ class CryptoHelper extends BaseFrameworkSystem implements Cryptable {
 	private $rngInstance = null;
 
 	/**
-	 * Salt for hashing operations
+	 * Instance of the crypto stream
 	 */
-	private $salt = '';
+	private $cryptoStreamInstance = null;
 
 	/**
-	 * Seperator on many places
+	 * Salt for hashing operations
 	 */
-	private $seperator = '|';
+	private $salt = '';
 
 	/**
 	 * Protected constructor
@@ -54,10 +54,6 @@ class CryptoHelper extends BaseFrameworkSystem implements Cryptable {
 	protected function __construct () {
 		// Call parent constructor
 		parent::__construct(__CLASS__);
-
-		// Clean up a little
-		$this->removeNumberFormaters();
-		$this->removeSystemArray();
 	}
 
 	/**
@@ -72,6 +68,9 @@ class CryptoHelper extends BaseFrameworkSystem implements Cryptable {
 		// Initialize the hasher
 		$cryptoInstance->initHasher();
 
+		// Attach a crypto stream
+		$cryptoInstance->attachCryptoStream();
+
 		// Return the instance
 		return $cryptoInstance;
 	}
@@ -86,12 +85,29 @@ class CryptoHelper extends BaseFrameworkSystem implements Cryptable {
 		if (is_null(self::$selfInstance)) {
 			// Then get a new one
 			self::$selfInstance = self::createCryptoHelper();
-		}
+		} // END - if
 
 		// Return the instance
 		return self::$selfInstance;
 	}
 
+	/**
+	 * Attaches a crypto stream to this crypto helper by detecting loaded
+	 * modules.
+	 *
+	 * @return	void
+	 */
+	protected function attachCryptoStream () {
+		// Do we have mcrypt loaded?
+		if ($this->isPhpExtensionLoaded('mcrypt')) {
+			// Then use it
+			$this->cryptoStreamInstance = ObjectFactory::createObjectByName('McryptStream', array($this->getRngInstance()));
+		} else {
+			// If nothing works ...
+			$this->cryptoStreamInstance = ObjectFactory::createObjectByName('NullCryptoStream');
+		}
+	}
+
 	/**
 	 * Initializes the hasher for different purposes.
 	 *
@@ -99,7 +115,7 @@ class CryptoHelper extends BaseFrameworkSystem implements Cryptable {
 	 */
 	protected function initHasher () {
 		// Initialize the random number generator which is required by some crypto methods
-		$this->rngInstance = ObjectFactory::createObjectByConfiguredName('rng_class');
+		$this->setRngInstance(ObjectFactory::createObjectByConfiguredName('rng_class'));
 
 		// Generate a salt for the hasher
 		$this->generateSalt();
@@ -112,7 +128,7 @@ class CryptoHelper extends BaseFrameworkSystem implements Cryptable {
 	 */
 	private function generateSalt () {
 		// Get a random string from the RNG
-		$randomString = $this->rngInstance->randomString();
+		$randomString = $this->getRngInstance()->randomString();
 
 		// Get config entry for salt length
 		$length = $this->getConfigInstance()->getConfigEntry('salt_length');
@@ -151,7 +167,7 @@ class CryptoHelper extends BaseFrameworkSystem implements Cryptable {
 		//* DEBUG: */ echo "salt=".$salt."/plain=".$str."<br />\n";
 		$hashed = $salt . md5(sprintf($this->getConfigInstance()->getConfigEntry('hash_mask'),
 			$salt,
-			$this->rngInstance->getFixedSalt(),
+			$this->getRngInstance()->getFixedSalt(),
 			$str
 		));
 
@@ -166,58 +182,8 @@ class CryptoHelper extends BaseFrameworkSystem implements Cryptable {
 	 * @return	$encrypted	Encrypted string
 	 */
 	public function encryptString ($str) {
-		// Init crypto module
-		$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
-		$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
-
-		// Get key
-		if ($this->getConfigInstance()->getConfigEntry('crypt_fixed_salt') == 'Y') {
-			$key = md5($this->rngInstance->getFixedSalt());
-		} else {
-			$key = md5($this->rngInstance->getExtraSalt());
-		}
-
-		// Add some "garbage" to the string
-		switch ($this->rngInstance->randomNumber(0, 8)) {
-			case 0:
-				$garbageString = crc32($this->rngInstance->randomString(10)) . $this->seperator . base64_encode($str) . $this->seperator . crc32($this->rngInstance->randomString(20));
-				break;
-
-			case 1:
-				$garbageString = crc32($this->rngInstance->randomString(10)) . $this->seperator . base64_encode($str) . $this->seperator . md5($this->rngInstance->randomString(20));
-				break;
-
-			case 2:
-				$garbageString = crc32($this->rngInstance->randomString(10)) . $this->seperator . base64_encode($str) . $this->seperator . sha1($this->rngInstance->randomString(20));
-				break;
-
-			case 3:
-				$garbageString = md5($this->rngInstance->randomString(10)) . $this->seperator . base64_encode($str) . $this->seperator . crc32($this->rngInstance->randomString(20));
-				break;
-
-			case 4:
-				$garbageString = md5($this->rngInstance->randomString(10)) . $this->seperator . base64_encode($str) . $this->seperator . md5($this->rngInstance->randomString(20));
-				break;
-
-			case 5:
-				$garbageString = md5($this->rngInstance->randomString(10)) . $this->seperator . base64_encode($str) . $this->seperator . sha1($this->rngInstance->randomString(20));
-				break;
-
-			case 6:
-				$garbageString = sha1($this->rngInstance->randomString(10)) . $this->seperator . base64_encode($str) . $this->seperator . crc32($this->rngInstance->randomString(20));
-				break;
-
-			case 7:
-				$garbageString = sha1($this->rngInstance->randomString(10)) . $this->seperator . base64_encode($str) . $this->seperator . md5($this->rngInstance->randomString(20));
-				break;
-
-			case 8:
-				$garbageString = sha1($this->rngInstance->randomString(10)) . $this->seperator . base64_encode($str) . $this->seperator . sha1($this->rngInstance->randomString(20));
-				break;
-		}
-
-		// Encrypt the string
-		$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $garbageString, MCRYPT_MODE_ECB, $iv);
+		// Encrypt the string through the stream
+		$encrypted = $this->cryptoStreamInstance->encryptStream($str);
 
 		// Return the string
 		return $encrypted;
@@ -230,31 +196,8 @@ class CryptoHelper extends BaseFrameworkSystem implements Cryptable {
 	 * @return	$str		The unencrypted string
 	 */
 	public function decryptString ($encrypted) {
-		// Init crypto module
-		$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
-		$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
-
-		// Get key
-		if ($this->getConfigInstance()->getConfigEntry('crypt_fixed_salt') == 'Y') {
-			$key = md5($this->rngInstance->getFixedSalt());
-		} else {
-			$key = md5($this->rngInstance->getExtraSalt());
-		}
-
-		// Decrypt the string
-		$garbageString = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $encrypted, MCRYPT_MODE_ECB, $iv);
-
-		// Get the real string out
-		$strArray = explode($this->seperator, $garbageString);
-
-		// Does the element count match?
-		assert(count($strArray) == 3);
-
-		// Decode the string
-		$str = base64_decode($strArray[1]);
-
-		// Trim trailing nulls away
-		$str = rtrim($str, "\0");
+		// Encrypt the string through the stream
+		$str = $this->cryptoStreamInstance->decryptStream($encrypted);
 
 		// Return the string
 		return $str;