System.Security
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Classes:
TDESCrypto
TUser
Files:
TDESCrypto.php
TUser.php

Class: TDESCrypto

Source Location: /Security/TDESCrypto.php

Class Overview




TDESCrypto class





Class Details



[line 44]

TDESCrypto class

TDESCrypto is an implementation of DES (the Data Encryption Standard),  an encryption algorithm which works on bits. It supports Electronic Codebook (ECB)  and Cipher Block Chaining (CBC) and also includes Triple DES.
Example:  
  1.  $key="this is a 24 byte key !!";
    2. 

  2.  $message="this is a test message!";
    3. 

  3.  $des=new TDESCrypto;
    4. 

  4.  $ciphertext=$des->encrypt($message,$key);
    5. 

  5.  echo "DES Test Encrypted: " . $ciphertext;
    6. 

  6.  $recovered_message = $des->decrypt($ciphertext,$key);
    7. 

  7.  echo "\nDES Test Decrypted: " . $recovered_message;
    8. 






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Methods

























Class Methods



  

	
	
method decrypt [line 68]

	

    

    

		string &decrypt(
string
&$data, string
$key)
    

    


	
		Decrypt data with DES (or 3DES if the key is at least 24 byte long).

Note, the key must be at least 8 byte long, or an exception will be raised.








  

    return:  decrypted result
  

  

    access:  public
  










        
Parameters:

    

    

          

        string  
        &$data  
        data to be decrypted
      

          

        string  
        $key  
        key
      

        

    


        
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method des [line 85]

	

    

    

		string des(
string
$key, string
$message, boolean
$encrypt, integer
$mode, string
$iv)
    

    


	
		The actual DES implementation.








  

    return:  encryption/decryption result
  

  

    access:  protected
  










        
Parameters:

    

    

          

        string  
        $key  
        key
      

          

        string  
        $message  
        data
      

          

        boolean  
        $encrypt  
        true for encryption, false for decryption
      

          

        integer  
        $mode  
        optional, 0 for ECB and 1 for CBC, ECB is the default
      

          

        string  
        $iv  
        optional, 8 character string input vector (not used in ECB mode)
      

        

    


        
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method encrypt [line 53]

	

    

    

		string &encrypt(
string
&$data, string
$key)
    

    


	
		Encrypt data with DES (or 3DES if the key is at least 24 byte long).

Note, the key must be at least 8 byte long, or an exception will be raised.








  

    return:  encrypted result
  

  

    access:  public
  










        
Parameters:

    

    

          

        string  
        &$data  
        data to be encrypted
      

          

        string  
        $key  
        key
      

        

    


        
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