(Visual Basic 6.0) Duplicate Java AES Results

Demonstrates how to duplicate Java code for AES encryption.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim crypt As New ChilkatCrypt2

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

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

crypt.EncodingMode = "hex"

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

Debug.Print 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);
' 	}
' }
'