aiNrDxN2

1import java.io.UnsupportedEncodingException;
2import java.security.MessageDigest;
3import java.security.NoSuchAlgorithmException;
4import java.util.Arrays;
5import java.util.Base64;
6
7import javax.crypto.Cipher;
8import javax.crypto.spec.SecretKeySpec;
9
10public class teste {
11	
12	private static SecretKeySpec secretKey;
13	 private static byte[] key;
14	    
15	public static void main(String[] args) {
16		
17		 final String secretKey = "70AA63A...929C01A7";
18		 	   String cartaoString = "j/pNO3NELLFzSCQmMD2AVMTKBe6dUeHF2eSYdykpaLw=";
19 
20		// byte[] decodedBytes = Base64.getDecoder().decode(secretKey);
21		//    String decodedString = new String(decodedBytes);
22		//    System.out.println(decodedString);
23
24		    String decryptedString = decrypt(cartaoString, secretKey) ;
25     
26		    System.out.println(cartaoString);
27		    System.out.println(decryptedString);
28
29	}
30	
31   
32    public static String decrypt(String strToDecrypt, String secret) 
33    {
34        try
35        {
36            setKey(secret);
37            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
38            cipher.init(Cipher.DECRYPT_MODE, secretKey);
39            return new String(cipher.doFinal(Base64.getDecoder().decode(strToDecrypt)));
40        } 
41        catch (Exception e) 
42        {
43            System.out.println("Error while decrypting: " + e.toString());
44        }
45        return null;
46    }
47    
48    public static void setKey(String myKey) 
49    {
50        MessageDigest sha = null;
51        try {
52            key = myKey.getBytes("UTF-8");
53            sha = MessageDigest.getInstance("SHA-1");
54            key = sha.digest(key);
55            key = Arrays.copyOf(key, 16); 
56            secretKey = new SecretKeySpec(key, "AES");
57        } 
58        catch (NoSuchAlgorithmException e) {
59            e.printStackTrace();
60        } 
61        catch (UnsupportedEncodingException e) {
62            e.printStackTrace();
63        }
64    }
65
66}
67