/**
* ========================================================
* 北京五八信息技术有限公司技术中心开发一部
* 日 期：2011-9-27 下午02:06:10
* 作 者：张纪豪
* 版 本：1.0.0
* ========================================================
* 修订日期 修订人 描述
*
*/
package org.howsun.util.security;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import org.howsun.util.Strings;
/**
* 功能描述：
* 使用示例：<br>
* String key = AES.generateKey(128);<br>
* System.out.println("key: " + key);<br>
* key = "6e67656f25a8cd836edb4c60cd42da6e";<br>
* String code = AES.encode("775", key);<br>
* System.out.println("code: " + code);<br>
* //code = "0bca33667da44e0a345615a629fc8591";<br>
* String text = AES.decode(code, key);<br>
* System.out.println("text: " + new String(text));<br>
* <br>
*
* @author howsun(howsun.zhang@google.com)
* @version 1.0.0
*/
public class AES{
///////////////////////////////////////2011-09-27 by 王文通//////////////////////////////////////////
/*
*
*/
/**
*
*/
public static String generateKey(int len) {
try {
KeyGenerator keyGen = KeyGenerator.getInstance("AES");
keyGen.init(len);
Key key = keyGen.generateKey();
//System.out.println(key.getEncoded());
return Strings.toHexString(key.getEncoded());
} catch (Exception e) {
return null;
}
}
/**
* 张纪豪添加
* @param len
* @param password
* @return
*/
public static String generateKey(int len, String password) {
try {
KeyGenerator keyGen = KeyGenerator.getInstance("AES");
keyGen.init(len);
keyGen.init(128, new SecureRandom(password.getBytes()));
Key key = keyGen.generateKey();
return Strings.toHexString(key.getEncoded());
} catch (Exception e) {
return null;
}
}
public static byte[] encode(byte[] source, String key) {
try {
byte[] ks = Strings.fromHexString(key);
Key tKey = new SecretKeySpec(ks, "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, tKey);
byte[] result = cipher.doFinal(source);
return result;
} catch (Exception e) {
return null;
}
}
public static String encode(String source, String key) {
byte[] src = source.getBytes();
byte[] code = encode(src,key);
return Strings.toHexString(code);
}
public static byte[] decode(byte[] source, String key) {
try {
byte[] ks = Strings.fromHexString(key);
Key tKey = new SecretKeySpec(ks, "AES");
Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, tKey);
byte[] result = cipher.doFinal(source);
return result;
} catch (Exception e) {
return null;
}
}
public static String decode(String source, String key) {
byte[] src = Strings.fromHexString(source);
byte[] rst = decode(src,key);
return new String(rst);
}
///////////////////////////////////////2011-09-27 by net//////////////////////////////////////////
/**
* 加密
*
* @param content 需要加密的内容
* @param password 加密密码
* @return
*/
public static byte[] encrypt(String content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");// 创建密码器
byte[] byteContent = content.getBytes("utf-8");
cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化
byte[] result = cipher.doFinal(byteContent);
return result; // 加密
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
return null;
}
/**解密
* @param content 待解密内容, 注意，需要确保16进制转换过的编码
* @param password 解密密钥
* @return
*/
public static byte[] decrypt(byte[] content, String password) {
try {
KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(128, new SecureRandom(password.getBytes()));
SecretKey secretKey = kgen.generateKey();
byte[] enCodeFormat = secretKey.getEncoded();
SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");
Cipher cipher = Cipher.getInstance("AES");// 创建密码器
cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
byte[] result = cipher.doFinal(content);
return result; // 加密
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
return null;
}
/**
* 将二进制转换成16进制
* @param buf
* @return
*/
public static String parseByte2HexStr(byte buf[]) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
/**
* 将16进制转换为二进制
* @param hexStr
* @return
*/
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1)
return null;
byte[] result = new byte[hexStr.length()/2];
for (int i = 0;i< hexStr.length()/2; i++) {
int high = Integer.parseInt(hexStr.substring(i*2, i*2+1), 16);
int low = Integer.parseInt(hexStr.substring(i*2+1, i*2+2), 16);
result[i] = (byte) (high * 16 + low);
}
return result;
}
private static void sample1(){
//String key = AES.generateKey(128);
// System.out.println("key: " + key);
String key = generateKey(128,"hoWs0un");
String code = AES.encode("237EXPERT[张纪豪]17227422", key);
System.out.println("code: " + code);
String text = AES.decode(code, key);
System.out.println("text: " + new String(text));
}
private static void sample2() throws UnsupportedEncodingException {
String content = "2345236345632522223EXPERT[张纪豪华人共和华共在和国吴鄂尔多斯左键中人民银行天津市]4356473417227422683";
String password = "b8K2m9H5o1W7n6";
/*
//加密
System.out.println("加密前：" + content);
byte[] encryptResult = encrypt(content, password);
System.out.println(new String(encryptResult,"UTF8"));
//解密
byte[] decryptResult = decrypt(encryptResult,password);
System.out.println("解密后：" + new String(decryptResult));
*/
//加密
System.out.println("加密前：" + content);
byte[] encryptResult = encrypt(content, password);
String encryptResultStr = parseByte2HexStr(encryptResult); //16进制转码
System.out.println("加密后：" + encryptResultStr);
System.out.println("加密后长度：" + encryptResultStr.length());
//解密
byte[] decryptFrom = parseHexStr2Byte(encryptResultStr); //16进制转码
byte[] decryptResult = decrypt(decryptFrom,password);
System.out.println("解密后：" + new String(decryptResult));
}
public static void main(String[] args) throws Exception {
sample1();//王文通代码
System.out.println("\ntest1 done......................\n");
sample2();//Iteye代码
System.out.println("张纪豪华人共和华共在和国吴鄂尔多斯左键中人民银行天津市".getBytes("UTF-8").length);
System.out.println("张纪豪".getBytes("UTF-8").length);
}
}