2-Key Triple DES

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

Download Chilkat Crypt ActiveX

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
set crypt = Server.CreateObject("Chilkat.Crypt2")

success = crypt.UnlockComponent("Anything for 30-day trial.")
If (success <> 1) Then
    Response.Write "Crypt component unlock failed" & "<br>"

End If

'  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")
Response.Write encStr & "<br>"

'  Now decrypt:
decStr = crypt.DecryptStringENC(encStr)
Response.Write decStr & "<br>"
%>
</body>
</html>

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