B4X

Duplicate Java AES Results

See more Encryption Examples

Demonstrates how to duplicate Java code for AES encryption. B4X

Dim crypt As ChilkatCrypt2
crypt.Initialize("crypt")

crypt.CryptAlgorithm = "aes"
crypt.CipherMode = "cbc"
crypt.KeyLength = 256

crypt.SetEncodedIV("000102030405060708090A0B0C0D0E0F", "hex")
crypt.SetEncodedKey("uX1AytOx2bqKn1G1NiblFM3YrEMnvciC", "ascii")

crypt.EncodingMode = "hex"

Dim encrypted As String = crypt.EncryptStringENC("tmpString")
Log(encrypted)

Log(crypt.DecryptStringENC(encrypted))


'  The above Chilkat code duplicates the following Java code:

'  import javax.crypto.Cipher;
'  import javax.crypto.spec.IvParameterSpec;
'  import javax.crypto.spec.SecretKeySpec;
'  
'  public class Test {
'  	private static final String KEY = "uX1AytOx2bqKn1G1NiblFM3YrEMnvciC";
'  	private static final String IV = "000102030405060708090A0B0C0D0E0F";
'  
'  	private static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
'  	public static String bytesToHex(byte[] bytes) {
'  	    char[] hexChars = new char[bytes.length * 2];
'  	    for (int j = 0; j < bytes.length; j++) {
'  	        int v = bytes[j] & 0xFF;
'  	        hexChars[j * 2] = HEX_ARRAY[v >>> 4];
'  	        hexChars[j * 2 + 1] = HEX_ARRAY[v & 0x0F];
'  	    }
'  	    return new String(hexChars);
'  	}
'  	public static byte[] hexToBytes(String s) {
'  	    int len = s.length();
'  	    byte[] data = new byte[len / 2];
'  	    for (int i = 0; i < len; i += 2) {
'  	        data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
'  	                             + Character.digit(s.charAt(i+1), 16));
'  	    }
'  	    return data;
'  	}
'  	public static byte[] encrypt(String value) {
'  		try {
'  			System.out.println("---- encrypt ----");
'  			IvParameterSpec iv = new IvParameterSpec(hexToBytes(IV));
'  			SecretKeySpec skeySpec = new SecretKeySpec(KEY.getBytes("ASCII"), "AES");
'  			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
'  			cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
'  			byte[] encrypted = cipher.doFinal(value.getBytes("ASCII"));
'  			String x = bytesToHex(encrypted);
'  			System.out.println(x);
'  			return encrypted;
'  		} catch (Exception ex) {
'  			ex.printStackTrace();
'  			return null;
'  		}
'  	}
'  
'  	public static String decrypt(byte[] encrypted) {
'  		try {
'  			System.out.println("---- decrypt ----");
'  			IvParameterSpec iv = new IvParameterSpec(hexToBytes(IV));
'  			SecretKeySpec skeySpec = new SecretKeySpec(KEY.getBytes("ASCII"), "AES");
'  			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
'  			cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
'  			byte[] original = cipher.doFinal(encrypted);
'  			String x = new String(original);
'  			System.out.println(x);
'  			return x;
'  		} catch (Exception ex) {
'  			ex.printStackTrace();
'  			return null;
'  		}
'  
'  	}
'  
'  	public static void main(String[] args) {
'  		byte[] encrypted = encrypt("tmpString");
'  		decrypt(encrypted);
'  	}
'  }
'