Chilkat2-Python

ClickBank Decrypt Instant Notification

See more ClickBank Examples

Demonstrates how to decrypt a ClickBank instant notification. See Instant Notification Service for more information and alternative code snippets. Chilkat2-Python

import chilkat2

success = False

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

# secret key from your ClickBank account
secretKey = "MY_SECRET_KEY"

jsonStr = "{\"notification\":\"BASE64_NOTIFICATION\",\"iv\":\"BASE64_IV\"}"

json = chilkat2.JsonObject()
success = json.Load(jsonStr)

# Get the encrypted notification (binary) and IV from the JSON.
bdNotif = chilkat2.BinData()
bdIv = chilkat2.BinData()

success = bdNotif.AppendEncoded(json.StringOf("notification"),"base64")
success = bdIv.AppendEncoded(json.StringOf("iv"),"base64")

# Get an SHA1 digest (as a hex string) of the secret key.
# A SHA1 digest is 20 bytes.  Therefore the hex string is 40 chars.
# Treat each us-ascii char as a binary byte of the secret key.
# 256-bit AES needs a 256-bit key, which is 32-bytes.  Therefore
# use the 1st 32 us-ascii chars of the hex SHA1 as the AES secret key.

crypt = chilkat2.Crypt2()
# Because we're using the hex string as the actual AES key, it matters whether the hex is uppercase or lowercase.
# We want lowercase.
crypt.EncodingMode = "hex_lower"
crypt.HashAlgorithm = "sha1"
hexSha1 = crypt.HashStringENC(secretKey)
print(hexSha1)

# Treat the hex string as binary data for the AES key..
bdKey = chilkat2.BinData()
bdKey.AppendString(hexSha1,"us-ascii")
bdKey.RemoveChunk(32,8)

crypt.KeyLength = 256
crypt.CryptAlgorithm = "aes"
crypt.CipherMode = "cbc"

# We can use any encoding because were just getting the binary bytes in an encoding, and then setting from the same encoding.
# We'll just use base64..
crypt.SetEncodedIV(bdIv.GetEncoded("base64"),"base64")
crypt.SetEncodedKey(bdKey.GetEncoded("base64"),"base64")

crypt.DecryptBd(bdNotif)
print("Decrypted: " + bdNotif.GetString("utf-8"))