Classic ASP
56-bit DES Encryption, ECB, CBC modes

Demonstrates the older 56-bit DES encryption in ECB and CBC modes.
Chilkat Classic ASP Downloads

Classic ASP
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

set crypt = Server.CreateObject("Chilkat.Crypt2")

' Specify DES for the encryption algorithm:
crypt.CryptAlgorithm = "des"

' CipherMode may be "ecb" or "cbc"
crypt.CipherMode = "cbc"

' Keylength is 64 bits (56 bits + 8 parity bits)
crypt.KeyLength = 64

' The padding scheme determines the contents of the bytes
' that are added to pad the result to a multiple of the
' encryption algorithm's block size.  DES has a block
' size of 8 bytes, so encrypted output is always
' a multiple of 8.
crypt.PaddingScheme = 0

' 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"

' An initialization vector is required if using CBC or CFB modes.
' ECB mode does not use an IV.
' The length of the IV is equal to the algorithm's block size.
' It is NOT equal to the length of the key.
ivHex = "0001020304050607"
crypt.SetEncodedIV ivHex,"hex"

' The secret key must equal the size of the key.  For 
' DES, the key must be 8 bytes (i.e. 64-bits).
keyHex = "0001020304050607"
crypt.SetEncodedKey keyHex,"hex"

' Encrypt a string...
' The input string is 44 ANSI characters (i.e. 44 bytes), so
' the output should be 48 bytes (a multiple of 8).
' Because the output is a hex string, it should
' be 96 characters long (2 chars per byte).
encStr = crypt.EncryptStringENC("The quick brown fox jumps over the lazy dog.")
Response.Write "<pre>" & Server.HTMLEncode( encStr) & "</pre>"

' Now decrypt:
decStr = crypt.DecryptStringENC(encStr)
Response.Write "<pre>" & Server.HTMLEncode( decStr) & "</pre>"

%>
</body>
</html>