(Java) Blowfish CFB Mode Encryption

Demonstrates how to encrypt using Blowfish CFB (Cipher Feedback) mode.

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris Java Libs for Android

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkCrypt2 crypt = new CkCrypt2();

    // Use "blowfish2" to produce correct results that match published blowfish test vectors.
    crypt.put_CryptAlgorithm("blowfish2");
    crypt.put_CipherMode("cfb");
    crypt.put_KeyLength(256);

    // EncodingMode specifies the encoding of the output for
    // encryption, and the input for decryption.
    // It may be "hex", "url", "base64", "quoted-printable", or many other choices.
    crypt.put_EncodingMode("hex");

    // The block size of the blowfish algoirthm is 8 bytes, therefore the IV is 8 bytes.
    String ivHex = "0001020304050607";
    crypt.SetEncodedIV(ivHex,"hex");

    // The secret key must equal the size of the key.  For
    // 256-bit encryption, the binary secret key is 32 bytes.
    String keyHex = "603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4";
    crypt.SetEncodedKey(keyHex,"hex");

    // Encrypt a string...
    String encStr = crypt.encryptStringENC("In all intellectual debates, both sides tend to be correct in what they affirm, and wrong in what they deny. -- John Stuart Mill");
    System.out.println(encStr);

    CkCrypt2 decrypt = new CkCrypt2();

    decrypt.put_CryptAlgorithm("blowfish2");
    decrypt.put_CipherMode("cfb");
    decrypt.put_KeyLength(256);
    decrypt.put_EncodingMode("hex");
    decrypt.SetEncodedIV(ivHex,"hex");
    decrypt.SetEncodedKey(keyHex,"hex");

    // Now decrypt:
    String decStr = decrypt.decryptStringENC(encStr);
    System.out.println(decStr);
  }
}