File Encryption / Decryption

File-to-file encryption in Java using AES, Blowfish, RC2, ARC4, or 3DES.

 Chilkat Java Library Downloads for Windows, Linux, and MAC OS X

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[])
  {
    CkCrypt2 crypt = new CkCrypt2();

    boolean success;
    success = crypt.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        System.out.println("Crypt component unlock failed");
        return;
    }

    crypt.put_CryptAlgorithm("aes");
    crypt.put_CipherMode("cbc");
    crypt.put_KeyLength(128);

    String key;
    //  16 bytes of key for 128-bit encryption.
    key = "1234567890123456";

    //  The IV is equal to the block size of the encryption algorithm.
    String iv;
    iv = "1234567890123456";

    //  Set the key.
    crypt.SetEncodedKey(key,"ascii");

    //  Set the IV
    crypt.SetEncodedIV(iv,"ascii");

    //  AES Encrypt the file (the file may be any size because it will
    //  stream the file in/out.
    success = crypt.CkEncryptFile("hamlet.xml","aesEncrypted.dat");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
    }

    //  AES Decrypt the file (the file may be any size because it will
    //  stream the file in/out.
    success = crypt.CkDecryptFile("aesEncrypted.dat","hamlet_aes.xml");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
    }

    System.out.println("AES File Encryption Success.");

    //  Now do 3DES file encryption:

    //  To use Triple-DES, set the algorithm = "des",
    //  and the key length = 168.
    //  To use DES, set the key length = 56 bits.
    crypt.put_CryptAlgorithm("des");
    crypt.put_CipherMode("cbc");
    crypt.put_KeyLength(168);

    //  3DES Encrypt the file
    success = crypt.CkEncryptFile("hamlet.xml","tripleDesEncrypted.dat");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
    }

    //  3DES Decrypt the file
    success = crypt.CkDecryptFile("tripleDesEncrypted.dat","hamlet_3des.xml");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
    }

    System.out.println("3DES File Encryption Success.");

    //  Do Blowfish file encryption:

    //  To use Blowfish, set the algorithm = "blowfish2".
    //  The original Chilkat "blowfish" implementation outputs
    //  4321 swapped bytes.  "blowfish2" output is in the correct
    //  byte order.
    crypt.put_CryptAlgorithm("blowfish2");
    crypt.put_CipherMode("cbc");
    crypt.put_KeyLength(128);

    //  Blowfish Encrypt the file
    success = crypt.CkEncryptFile("hamlet.xml","blowfishEncrypted.dat");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
    }

    //  Blowfish Decrypt the file
    success = crypt.CkDecryptFile("blowfishEncrypted.dat","hamlet_blowfish.xml");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
    }

    System.out.println("Blowfish File Encryption Success.");

    //  Do RC2 file encryption:

    //  To use RC2, set the algorithm = "rc2".
    //  Also, set the Rc2EffectiveKeyLength property.
    crypt.put_CryptAlgorithm("rc2");
    crypt.put_CipherMode("cbc");
    //  Key length and effective key length should range
    //  from 8 to 1024 bits.
    crypt.put_KeyLength(128);
    crypt.put_Rc2EffectiveKeyLength(128);

    //  RC2 Encrypt the file
    success = crypt.CkEncryptFile("hamlet.xml","rc2Encrypted.dat");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
    }

    //  RC2 Decrypt the file
    success = crypt.CkDecryptFile("rc2Encrypted.dat","hamlet_rc2.xml");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
    }

    System.out.println("RC2 File Encryption Success.");

    //  Do ARC4 file encryption:

    //  To use ARC4, set the algorithm = "arc4".
    crypt.put_CryptAlgorithm("arc4");
    crypt.put_KeyLength(128);

    //  ARC4 Encrypt the file
    success = crypt.CkEncryptFile("hamlet.xml","arc4Encrypted.dat");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
    }

    //  ARC4 Decrypt the file
    success = crypt.CkDecryptFile("arc4Encrypted.dat","hamlet_arc4.xml");
    if (success != true) {
        System.out.println(crypt.lastErrorText());
        return;
    }

    System.out.println("ARC4 File Encryption Success.");


  }
}