Java

3DES Encryption, ECB, CBC modes

See more Encryption Examples

3DES encryption. The Chilkat encryption component supports Triple-DES in both ECB (Electronic Cookbook) and CBC (Cipher-Block Chaining) cipher modes. Chilkat2 Java

import com.chilkatsoft.chilkat2.Crypt2;

public class ChilkatExample {

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

        Crypt2 crypt = new Crypt2();

        // Specify 3DES for the encryption algorithm:
        crypt.setCryptAlgorithm("3des");

        // CipherMode may be "ecb" or "cbc"
        crypt.setCipherMode("cbc");

        // KeyLength must be 192.  3DES is technically 168-bits;
        // the most-significant bit of each key byte is a parity bit,
        // so we must indicate a KeyLength of 192, which includes
        // the parity bits.
        crypt.setKeyLength(192);

        // The padding scheme determines the contents of the bytes
        // that are added to pad the result to a multiple of the
        // encryption algorithm's block size.  3DES has a block
        // size of 8 bytes, so encrypted output is always
        // a multiple of 8.
        crypt.setPaddingScheme(0);

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

        // An initialization vector is required if using CBC or CFB modes.
        // ECB mode does not use an IV.
        // The length of the IV is equal to the algorithm's block size.
        // It is NOT equal to the length of the key.
        String ivHex = "0001020304050607";
        crypt.setEncodedIV(ivHex, "hex");

        // The secret key must equal the size of the key.  For
        // 3DES, the key must be 24 bytes (i.e. 192-bits).
        String keyHex = "000102030405060708090A0B0C0D0E0F0001020304050607";
        crypt.setEncodedKey(keyHex, "hex");

        // Encrypt a string...
        // The input string is 44 ANSI characters (i.e. 44 bytes), so
        // the output should be 48 bytes (a multiple of 8).
        // Because the output is a hex string, it should
        // be 96 characters long (2 chars per byte).
        String encStr = crypt.encryptStringENC("The quick brown fox jumps over the lazy dog.");
        System.out.println(encStr);

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