Java

AES Encryption

See more Encryption Examples

AES encryption. The Chilkat encryption component supports 128-bit, 192-bit, and 256-bit AES encryption in ECB (Electronic Cookbook), CBC (Cipher-Block Chaining), and other modes. Chilkat2 Java

import com.chilkatsoft.chilkat2.Crypt2;

public class ChilkatExample {

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

        Crypt2 crypt = new Crypt2();

        // AES is also known as Rijndael.
        crypt.setCryptAlgorithm("aes");

        // CipherMode may be "ecb", "cbc", "ofb", "cfb", "gcm", etc.
        // Note: Check the online reference documentation to see the Chilkat versions
        // when certain cipher modes were introduced.
        crypt.setCipherMode("cbc");

        // KeyLength may be 128, 192, 256
        crypt.setKeyLength(256);

        // 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.  AES has a block
        // size of 16 bytes, so encrypted output is always
        // a multiple of 16.
        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 mode.
        // 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 = "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.
        // For 128-bit encryption, the binary secret key is 16 bytes.
        String keyHex = "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F";
        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 16).
        // 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);

        // This is the encrypted output in hex format:
        // 4846F83AA211E239AA62A21F527F089EE9DDBEAD30EE15D4E79B607A621B97BEDB9B6F00A9B21F1B43A50B4C1BE0EDF2

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

        // This is the decrypted string:
        // The quick brown fox jumps over the lazy dog.
    }
}