package com.struts;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.security.Key;
import java.security.MessageDigest;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
/**
* Security 提供了一個安全算法類,其中包括對稱密碼算法和散列算法
*/
public final class Security {
// The length of Encryptionstring should be 8 bytes and not be
// a weak key
private final static BASE64Encoder base64encoder = new BASE64Encoder();
private final static BASE64Decoder base64decoder = new BASE64Decoder();
private final static String encoding = "UTF-8";
/**
* 加密字符串
*/
public static String Encryp(String str) {
String result = str;
if (str != null && str.length() > 0) {
try {
byte[] encodeByte = symmetricEncrypto(str.getBytes(encoding));
result = base64encoder.encode(encodeByte);
} catch (Exception e) {
e.printStackTrace();
}
}
return result;
}
/**
* 解密字符串
*/
public static String Decryp(String str) {
String result = str;
if (str != null && str.length() > 0) {
try {
byte[] encodeByte = base64decoder.decodeBuffer(str);
byte[] decoder = Security.symmetricDecrypto(encodeByte);
result = new String(decoder, encoding);
} catch (Exception e) {
e.printStackTrace();
}
}
return result;
}
/**
* 對稱加密方法
*
* @param byteSource
* 需要加密的數據
* @return 經過加密的數據
* @throws Exception
*/
public static byte[] symmetricEncrypto(byte[] byteSource) throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
int mode = Cipher.ENCRYPT_MODE;
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
byte[] keyData = { 1, 9, 7, 9, 0, 2, 0, 7 };
DESKeySpec keySpec = new DESKeySpec(keyData);
Key key = keyFactory.generateSecret(keySpec);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(mode, key);
byte[] result = cipher.doFinal(byteSource);
return result;
} catch (Exception e) {
throw e;
} finally {
baos.close();
}
}
/**
* 對稱解密方法
*
* @param byteSource
* 需要解密的數據
* @return 經過解密的數據
* @throws Exception
*/
public static byte[] symmetricDecrypto(byte[] byteSource) throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
int mode = Cipher.DECRYPT_MODE;
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
byte[] keyData = { 1, 9, 7, 9, 0, 2, 0, 7 };
DESKeySpec keySpec = new DESKeySpec(keyData);
Key key = keyFactory.generateSecret(keySpec);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(mode, key);
byte[] result = cipher.doFinal(byteSource);
return result;
} catch (Exception e) {
throw e;
} finally {
baos.close();
}
}
/**
* 散列算法
*
* @param byteSource
* 需要散列計算的數據
* @return 經過散列計算的數據
* @throws Exception
*/
public static byte[] hashMethod(byte[] byteSource) throws Exception {
try {
MessageDigest currentAlgorithm = MessageDigest.getInstance("SHA-1");
currentAlgorithm.reset();
currentAlgorithm.update(byteSource);
return currentAlgorithm.digest();
} catch (Exception e) {
throw e;
}
}
public static String getMACAddress() {
String address = "";
String os = System.getProperty("os.name");
if (os != null && os.startsWith("Windows")) {
try {
String command = "cmd.exe /c ipconfig /all";
Process p = Runtime.getRuntime().exec(command);
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while ((line = br.readLine()) != null) {
if (line.indexOf("Physical Address") > 0) {
int index = line.indexOf(":");
index += 2;
address = line.substring(index);
break;
}
}
br.close();
return address.trim();
} catch (IOException e) {
e.printStackTrace();
}
} else {// linux /sbin/ifconfig
try {
String command = "/sbin/ifconfig";
Process p = Runtime.getRuntime().exec(command);
BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while ((line = br.readLine()) != null) {
if (line.indexOf("HWaddr") > 0) {
int index = line.indexOf("HWaddr");
index += 7;
address = line.substring(index);
break;
}
}
br.close();
return address.trim();
} catch (IOException e) {
e.printStackTrace();
}
}
return address;
}
}