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

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

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Crypt2')
$crypt = new COM("Chilkat.Crypt2");

// Specify 3DES for the encryption algorithm:
$crypt->CryptAlgorithm = '3des';

$crypt->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->KeyLength = 128;

// Pad with zeros
$crypt->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->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->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";

?>