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- import java.io.UnsupportedEncodingException;
- import java.security.MessageDigest;
- import java.security.NoSuchAlgorithmException;
- import java.util.Arrays;
- import java.util.Base64;
- import javax.crypto.Cipher;
- import javax.crypto.spec.SecretKeySpec;
- public class AES {
- private static SecretKeySpec secretKey;
- private static byte[] key;
- public static void setKey(String myKey)
- {
- MessageDigest sha = null;
- try {
- key = myKey.getBytes("UTF-8");
- sha = MessageDigest.getInstance("SHA-1");
- key = sha.digest(key);
- key = Arrays.copyOf(key, 16);
- secretKey = new SecretKeySpec(key, "AES");
- }
- catch (NoSuchAlgorithmException e) {
- e.printStackTrace();
- }
- catch (UnsupportedEncodingException e) {
- e.printStackTrace();
- }
- }
- public static String encrypt(String strToEncrypt, String secret)
- {
- try
- {
- setKey(secret);
- Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
- cipher.init(Cipher.ENCRYPT_MODE, secretKey);
- return Base64.getEncoder().encodeToString(cipher.doFinal(strToEncrypt.getBytes("UTF-8")));
- }
- catch (Exception e)
- {
- System.out.println("Error while encrypting: " + e.toString());
- }
- return null;
- }
- public static String decrypt(String strToDecrypt, String secret)
- {
- try
- {
- setKey(secret);
- Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
- cipher.init(Cipher.DECRYPT_MODE, secretKey);
- return new String(cipher.doFinal(Base64.getDecoder().decode(strToDecrypt)));
- }
- catch (Exception e)
- {
- System.out.println("Error while decrypting: " + e.toString());
- }
- return null;
- }
- }
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