112-bit 3DES Encryption

Demonstrates how to do 112-bit 3DES encryption.

Downloads for Windows/Linux and Install Instructions

require 'rubygems'
require 'chilkat'

crypt = Chilkat::CkCrypt2.new()

success = crypt.UnlockComponent("Anything for 30-day trial")
if (success != true)
    print "Crypt component unlock failed" + "\n"
    exit
end

#  Specify 3DES for the encryption algorithm:
crypt.put_CryptAlgorithm("3des")

#  CipherMode may be "ecb" or "cbc"
crypt.put_CipherMode("ecb")

#  Set the key length
crypt.put_KeyLength(112)

#  Choose a padding scheme...
crypt.put_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.put_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.
#  Remember, DES (i.e. 3DES) uses a parity bit in the key,
#  so 112-bit 3DES requires 128 bits of key material
#  (i.e. 16 bytes)
keyHex = "11165395389c904862912aba16d315b8"
crypt.SetEncodedKey(keyHex,"hex")

#  Encrypt a string...
encStr = crypt.encryptStringENC("999999987")
#  The result should be: 8CDBB138C11EDC3A77F04E488B46385C
print encStr + "\n"

#  Now decrypt:
decStr = crypt.decryptStringENC(encStr)
print decStr + "\n"