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1
2
3
4import com.sun.org.apache.xerces.internal.impl.io.UTF8Reader;
5import com.sun.xml.internal.messaging.saaj.packaging.mime.util.ASCIIUtility;
6import org.apache.commons.codec.binary.Base64;
7
8import javax.crypto.Cipher;
9import javax.crypto.spec.SecretKeySpec;
10import java.io.UnsupportedEncodingException;
11import java.security.InvalidKeyException;
12import java.security.Key;
13import java.security.MessageDigest;
14import java.security.NoSuchAlgorithmException;
15import java.util.Arrays;
16
17public class AES {
18
19
20    private static SecretKeySpec secretKey;
21    private static byte[] key;
22
23    private static String decryptedString;
24    private static String encryptedString;
25
26
27    public static void setKey(String myKey) {
28
29
30        MessageDigest sha = null;
31        try {
32            key = myKey.getBytes("UTF-8");
33            System.out.println(key.length);
34            sha = MessageDigest.getInstance("SHA-1");
35            key = sha.digest(key);
36            key = Arrays.copyOf(key, 16); // use only first 128 bit
37            System.out.println(key.length);
38            System.out.println(new String(key, "UTF-8"));
39            secretKey = new SecretKeySpec(key, "AES");
40
41
42        } catch (NoSuchAlgorithmException e) {
43            // TODO Auto-generated catch block
44            e.printStackTrace();
45        } catch (UnsupportedEncodingException e) {
46            // TODO Auto-generated catch block
47            e.printStackTrace();
48        }
49
50
51    }
52
53    public static String getDecryptedString() {
54        return decryptedString;
55    }
56
57    public static void setDecryptedString(String decryptedString) {
58        AES.decryptedString = decryptedString;
59    }
60
61    public static String getEncryptedString() {
62        return encryptedString;
63    }
64
65    public static void setEncryptedString(String encryptedString) {
66        AES.encryptedString = encryptedString;
67    }
68
69    public static String encrypt(String strToEncrypt) {
70        try {
71            Cipher cipher = Cipher.getInstance("AES");
72
73            cipher.init(Cipher.ENCRYPT_MODE, secretKey);
74
75
76            byte[] binaryData = cipher.doFinal(strToEncrypt.getBytes("UTF-8"));
77            setEncryptedString(Base64.encodeBase64String(binaryData));
78
79
80
81        } catch (Exception e) {
82
83            System.out.println("Error while encrypting: " + e.toString());
84        }
85        return null;
86
87    }
88
89    public static String decrypt(String strToDecrypt) {
90        try {
91            Cipher cipher = Cipher.getInstance("AES");
92
93            cipher.init(Cipher.DECRYPT_MODE, secretKey);
94            setDecryptedString(new String(cipher.doFinal(Base64.decodeBase64(strToDecrypt))));
95
96        } catch (Exception e) {
97
98            System.out.println("Error while decrypting: " + e.toString());
99
100        }
101        return null;
102    }
103
104
105    public static void main(String args[]) throws Exception {
106
107        final String strToEncrypt = "0000000000000P00"; //ASCII P = 01010000xb
108        final String password = "0000000000000118"; // sest 0280 -> 118xh
109
110        byte[] keyBytes = password.getBytes();
111
112        Key key = new SecretKeySpec(keyBytes, "AES");
113        Cipher c = Cipher.getInstance("AES");
114        c.init(Cipher.ENCRYPT_MODE, key);
115        System.out.println(Base64.encodeBase64String( c.doFinal(strToEncrypt.getBytes())));
116//        for (byte b : c.doFinal(strToEncrypt.getBytes())) {
117//            System.out.print(b);
118//        }
119
120//        AES.setKey(password);
121//
122//        AES.encrypt(strToEncrypt.trim());
123//
124//        System.out.println("String to Encrypt: " + strToEncrypt);
125//        System.out.println("Encrypted: " + AES.getEncryptedString());
126////
127//        final String strToDecrypt = AES.getEncryptedString();
128//        AES.decrypt(strToDecrypt.trim());
129//
130//        System.out.println("String To Decrypt : " + strToDecrypt);
131//        System.out.println("Decrypted : " + AES.getDecryptedString());
132    }
133
134}
135//    public static void main(String args[]) throws Exception {