Nz8MRyNm

1AES Decryption not working
2public static byte[] hexStringToByteArray(String s) {
3    int len = s.length();
4    byte[] data = new byte[len / 2];
5    for (int i = 0; i < len; i += 2) {
6        data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
7                             + Character.digit(s.charAt(i+1), 16));}
8    return data;
9}
10	
11dh=new data_helper(Resy.this);
12        mac_db=dh.getData();
13
14//        getdata=mac_db.toString();
15
16        KeyGenerator kgen;
17        try {
18            kgen = KeyGenerator.getInstance("AES");
19
20             kgen.init(128); // 192 and 256 bits may not be available
21
22  // Generate the secret key specs.
23                SecretKey skey = kgen.generateKey();
24                byte[] raw = skey.getEncoded();
25
26                SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
27
28
29                // Instantiate the cipher
30
31                Cipher cipher = Cipher.getInstance("AES");
32                         getdata=mac_db.toString();
33//              byte g1[]=getdata.getBytes();
34//              System.out.println(g1);
35
36        byte b[]=hexStringToByteArray(getdata);
37        cipher.init(Cipher.DECRYPT_MODE, skeySpec);
38        byte[] m1=cipher.doFinal(b);   // here pad block corrupt exception came.
39                String originalString_mac = new String(original_macadress);
40                Toast.makeText(getApplicationContext(),"Original : " +originalString_mac + " " + asHex(original_macadress) , Toast.LENGTH_LONG).show();
41	
42Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");