I have tried several ways and I found a suitable way for my situation that may not fit for others.
I have used the DES (AES may have more features)
Here is my example:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.security.spec.KeySpec; import javax.crypto.Cipher; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import org.apache.commons.io.IOUtils; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; public class DESEncryptionSample2 { private static final String UNICODE_FORMAT = "UTF8"; public static final String DES_ENCRYPTION_SCHEME = "DES"; private KeySpec myKeySpec; private SecretKeyFactory mySecretKeyFactory; private Cipher cipher; byte[] keyAsBytes; private String myEncryptionKey; private String myEncryptionScheme; SecretKey key; public DESEncryptionSample2() throws Exception { myEncryptionKey = "ThisIsSecretEncryptionKey"; myEncryptionScheme = DES_ENCRYPTION_SCHEME; keyAsBytes = myEncryptionKey.getBytes(UNICODE_FORMAT); myKeySpec = new DESKeySpec(keyAsBytes); mySecretKeyFactory = SecretKeyFactory.getInstance(myEncryptionScheme); cipher = Cipher.getInstance(myEncryptionScheme); key = mySecretKeyFactory.generateSecret(myKeySpec); } /** * Method To Encrypt The String */ public String encrypt(String unencryptedString) { String encryptedString = null; try { cipher.init(Cipher.ENCRYPT_MODE, key); byte[] plainText = unencryptedString.getBytes(UNICODE_FORMAT); byte[] encryptedText = cipher.doFinal(plainText); BASE64Encoder base64encoder = new BASE64Encoder(); encryptedString = base64encoder.encode(encryptedText); } catch (Exception e) { e.printStackTrace(); } return encryptedString; } /** * Method To Decrypt An Ecrypted String */ public String decrypt(String encryptedString) { String decryptedText = null; try { cipher.init(Cipher.DECRYPT_MODE, key); BASE64Decoder base64decoder = new BASE64Decoder(); byte[] encryptedText = base64decoder.decodeBuffer(encryptedString); byte[] plainText = cipher.doFinal(encryptedText); decryptedText = bytes2String(plainText); } catch (Exception e) { e.printStackTrace(); } return decryptedText; } /** * Returns String From An Array Of Bytes */ private static String bytes2String(byte[] bytes) { StringBuffer stringBuffer = new StringBuffer(); for (int i = 0; i < bytes.length; i++) { stringBuffer.append((char) bytes[i]); } return stringBuffer.toString(); } public static void saveEncrypted(String value) { try { File file = new File("Encrypted.txt"); IOUtils.write(value, new FileOutputStream(file)); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } public static String readEncrypted() { try { File file = new File("Encrypted.txt"); // return IOUtils.toByteArray(new FileInputStream(file)); return IOUtils.toString(new FileInputStream(file)); } catch (FileNotFoundException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } return null; } /** * Testing the DES Encryption And Decryption Technique */ public static void main(String args[]) throws Exception { DESEncryptionSample2 myEncryptor = new DESEncryptionSample2(); String stringToEncrypt = "10.100.102.5"; String encrypted = myEncryptor.encrypt(stringToEncrypt); System.out.println("Encrypted Value :" + encrypted); saveEncrypted(encrypted); System.out.println(readEncrypted()); // String decrypted = myEncryptor.decrypt(encrypted); String decrypted = myEncryptor.decrypt(readEncrypted()); System.out.println("String To Encrypt: " + stringToEncrypt); System.out.println("Decrypted Value :" + decrypted); } } |
