Java

AES OFB Output Feedback Mode Encryption

See more Encryption Examples

Demonstrates how to encrypt using AES OFB (Output Feedback) mode. Java

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

    CkCrypt2 crypt = new CkCrypt2();

    crypt.put_CryptAlgorithm("aes");
    // Set the cipher mode to Output Feedback
    crypt.put_CipherMode("ofb");
    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");

    String ivHex = "000102030405060708090A0B0C0D0E0F";
    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("Popular opinions, on subjects not palpable to sense, are often true, but seldom or never the whole truth. -- John Stuart Mill");
    System.out.println(encStr);

    CkCrypt2 decrypt = new CkCrypt2();
    decrypt.put_CryptAlgorithm("aes");
    decrypt.put_CipherMode("ofb");
    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);
  }
}