(CkPython) 2-Key Triple DES (112 bits)

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

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import chilkat

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

crypt = chilkat.CkCrypt2()

# 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)

# Now decrypt:
decStr = crypt.decryptStringENC(encStr)
print(decStr)