public String decrypt(String encryptedString) throws Exception {
if (encryptedString == null || encryptedString.trim().length() <= 0) {
throw new ProgramLogicError("Invalid input text:" + encryptedString);
}
SecretKey key = keyFactory.generateSecret(keySpec);
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] cleartext = Base64.decodeBuffer(encryptedString);
byte[] ciphertext = cipher.doFinal(cleartext);
return new String(ciphertext, UNICODE_FORMAT);
}
public String encrypt(String unencryptedString) throws Exception {
if (unencryptedString == null || unencryptedString.trim().length() == 0) {
throw new ProgramLogicError("Invalid input text:" + unencryptedString);
}
SecretKey key = keyFactory.generateSecret(keySpec);
cipher.init(Cipher.ENCRYPT_MODE, key);
byte[] cleartext = unencryptedString.getBytes(UNICODE_FORMAT);
byte[] ciphertext = cipher.doFinal(cleartext);
return Base64.encode(ciphertext);
}