Ok, so the problem is that you are converting the encrypted bytes to a hex string (using the asHex
method) but are not converting the hex string back to a byte array correctly for decryption. You can’t use getBytes
.
You can use the following method to convert a hex string to a byte array:
public static byte[] fromHexString(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;
}
and then change your decrypt method to use:
original = cipher.doFinal(fromHexString(message));