2-Key Triple DES

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

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use chilkat();

$crypt = new chilkat::CkCrypt2();

$success = $crypt->UnlockComponent("Anything for 30-day trial.");
if ($success != 1) {
    print "Crypt component unlock failed" . "\n";
    exit;
}

#  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";