C++

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. C++

#include <CkJsonObject.h>
#include <CkBinData.h>
#include <CkCrypt2.h>

void ChilkatSample(void)
    {
    bool 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
    const char *secretKey = "MY_SECRET_KEY";

    const char *jsonStr = "{\"notification\":\"BASE64_NOTIFICATION\",\"iv\":\"BASE64_IV\"}";

    CkJsonObject json;
    success = json.Load(jsonStr);

    //  Get the encrypted notification (binary) and IV from the JSON.
    CkBinData bdNotif;
    CkBinData bdIv;

    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.

    CkCrypt2 crypt;
    //  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.put_EncodingMode("hex_lower");
    crypt.put_HashAlgorithm("sha1");
    const char *hexSha1 = crypt.hashStringENC(secretKey);
    std::cout << hexSha1 << "\r\n";

    //  Treat the hex string as binary data for the AES key..
    CkBinData bdKey;
    bdKey.AppendString(hexSha1,"us-ascii");
    bdKey.RemoveChunk(32,8);

    crypt.put_KeyLength(256);
    crypt.put_CryptAlgorithm("aes");
    crypt.put_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);
    std::cout << "Decrypted: " << bdNotif.getString("utf-8") << "\r\n";
    }