(PHP Extension) 2-Key Triple DES (112 bits)

Demonstrates 2-Key Triple DES encryption (112-bit 3DES encryption).

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$crypt = new CkCrypt2();

// Specify 3DES for the encryption algorithm:
$crypt->put_CryptAlgorithm('3des');

$crypt->put_CipherMode('ecb');

// For 2-Key Triple-DES, use a key length of 128
// (Given that each byte's msb is a parity bit, the strength is really 112 bits).
$crypt->put_KeyLength(128);

// Pad with zeros
$crypt->put_PaddingScheme(3);

// EncodingMode specifies the encoding of the output for
// encryption, and the input for decryption.
// It may be "hex", "url", "base64", or "quoted-printable".
$crypt->put_EncodingMode('hex');

// Let's create a secret key by using the MD5 hash of a password.
// The Digest-MD5 algorithm produces a 16-byte hash (i.e. 128 bits)
$crypt->put_HashAlgorithm('md5');
$keyHex = $crypt->hashStringENC('secretPassword');

// Set the encryption key:
$crypt->SetEncodedKey($keyHex,'hex');

// Encrypt
$encStr = $crypt->encryptStringENC('The quick brown fox jumped over the lazy dog');
print $encStr . "\n";

// Now decrypt:
$decStr = $crypt->decryptStringENC($encStr);
print $decStr . "\n";

?>