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Examples

Mcrypt can be used to encrypt and decrypt using the above mentioned ciphers. If you linked against libmcrypt-2.2.x, the four important mcrypt commands ( mcrypt_cfb(), mcrypt_cbc(), mcrypt_ecb(), and mcrypt_ofb()) can operate in both modes which are named MCRYPT_ENCRYPT and MCRYPT_DECRYPT, respectively.

Example #1 Encrypt an input value with TripleDES under 2.2.x in ECB mode

  <?php 
$key  =  "this is a secret key" ; 
 $input  =  "Let us meet at 9 o'clock at the secret place." ; 
 
 $encrypted_data  =  mcrypt_ecb  ( MCRYPT_3DES ,  $key ,  $input ,  MCRYPT_ENCRYPT ); 
 ?>

This example will give you the encrypted data as a string in $encrypted_data.

If you linked against libmcrypt 2.4.x or 2.5.x, these functions are still available, but it is recommended that you use the advanced functions.

Example #2 Encrypt an input value with TripleDES under 2.4.x and higher in ECB mode

  <?php 
    $key  =  "this is a secret key" ; 
     $input  =  "Let us meet at 9 o'clock at the secret place." ; 
 
     $td  =  mcrypt_module_open ( 'tripledes' ,  '' ,  'ecb' ,  '' ); 
     $iv  =  mcrypt_create_iv  ( mcrypt_enc_get_iv_size ( $td ),  MCRYPT_RAND ); 
     mcrypt_generic_init ( $td ,  $key ,  $iv ); 
     $encrypted_data  =  mcrypt_generic ( $td ,  $input ); 
     mcrypt_generic_deinit ( $td ); 
     mcrypt_module_close ( $td ); 
 ?>

This example will give you the encrypted data as a string in $encrypted_data. For a full example see mcrypt_module_open().

Mcrypt ciphers

Mcrypt Functions

Mcrypt

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