MD5
package cn.greatlife.wechat.util;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* @Type MD5Util
* @Desc MD5輔助類
* @author hongxia.huhx
* @date 2012-3-4
* @Version V1.0
*/
public class MD5Util {
private static ThreadLocal<MessageDigest> messageDigestHolder = new ThreadLocal<MessageDigest>();
// 用來將字節轉換成 16 進製表示的字符
static final char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
static {
try {
MessageDigest message = MessageDigest.getInstance("MD5");
messageDigestHolder.set(message);
} catch (NoSuchAlgorithmException e) {
}
}
/***
*
* @Title: getMD5Format
* @Description: 計算MD5並轉換爲32字節明文顯示串
* @author wujl
* @param data
* @return String 返回類型
*/
public static String getMD5Format(String data) {
try {
MessageDigest message = messageDigestHolder.get();
if (message == null) {
message = MessageDigest.getInstance("MD5");
messageDigestHolder.set(message);
}
message.update(data.getBytes("UTF-8"));
byte[] b = message.digest();
String digestHexStr = "";
for (int i = 0; i < 16; i++) {
digestHexStr += byteHEX(b[i]);
}
return digestHexStr;
} catch (Exception e) {
return null;
}
}
/**
* 計算MD5並轉換爲32字節明文顯示串
* @param data
* @return
*/
public static String getMD5Format(String[] data) {
try {
MessageDigest message = messageDigestHolder.get();
if (message == null) {
message = MessageDigest.getInstance("MD5");
messageDigestHolder.set(message);
}
for (int i = 0; i < data.length; i++) {
message.update(data[i].getBytes("UTF-8"));
}
byte[] b = message.digest();
String digestHexStr = "";
for (int i = 0; i < 16; i++) {
digestHexStr += byteHEX(b[i]);
}
return digestHexStr;
} catch (Exception e) {
return null;
}
}
public static String md5Encrypt32Upper(String string) {
byte[] hash;
try {
//創建一個MD5算法對象,並獲得MD5字節數組,16*8=128位
hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Huh, MD5 should be supported?", e);
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("Huh, UTF-8 should be supported?", e);
}
//轉換爲十六進制字符串
StringBuilder hex = new StringBuilder(hash.length * 2);
for (byte b : hash) {
if ((b & 0xFF) < 0x10) hex.append("0");
hex.append(Integer.toHexString(b & 0xFF));
}
return hex.toString().toUpperCase();
}
/**
* MD5加密字符串(32位小寫)
*
* @param string 需要進行MD5加密的字符串
* @return 加密後的字符串(小寫)
*/
public static String md5Encrypt32Lower(String string) {
byte[] hash;
try {
//創建一個MD5算法對象,並獲得MD5字節數組,16*8=128位
hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Huh, MD5 should be supported?", e);
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("Huh, UTF-8 should be supported?", e);
}
//轉換爲十六進制字符串
StringBuilder hex = new StringBuilder(hash.length * 2);
for (byte b : hash) {
if ((b & 0xFF) < 0x10) hex.append("0");
hex.append(Integer.toHexString(b & 0xFF));
}
return hex.toString().toLowerCase();
}
/***
*
* @Title: byteHEX
* @Description:
* @author wujl
* @param ib
* @return String 返回類型
*/
private static String byteHEX(byte ib) {
char[] ob = new char[2];
ob[0] = hexDigits[(ib >>> 4) & 0X0F];
ob[1] = hexDigits[ib & 0X0F];
String s = new String(ob);
return s;
}
}
AES
package org.linlinjava.litemall.core.util;
import org.linlinjava.litemall.core.config.BaseTrade;
import org.linlinjava.litemall.core.config.TransResult;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.crypto.*;
import javax.crypto.spec.SecretKeySpec;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
/**
* @author :
* @description :
* @date : 2019/10/28 19:27
*/
public class AESUtil extends BaseTrade {
/*
* 加密
* 1.構造密鑰生成器
* 2.根據ecnodeRules規則初始化密鑰生成器
* 3.產生密鑰
* 4.創建和初始化密碼器
* 5.內容加密
* 6.返回字符串
*/
public static TransResult<String> AESEncode(String encodeRules, String content){
TransResult<String> transResult = new TransResult<>();
if(StringUtil.isEmpty(encodeRules) || StringUtil.isEmpty(content)){
transResult.failure("參數異常");
}
try {
//1.構造密鑰生成器,指定爲AES算法,不區分大小寫
KeyGenerator keygen=KeyGenerator.getInstance("AES");
//2.根據ecnodeRules規則初始化密鑰生成器
//生成一個128位的隨機源,根據傳入的字節數組
keygen.init(128, new SecureRandom(encodeRules.getBytes()));
//3.產生原始對稱密鑰
SecretKey original_key=keygen.generateKey();
//4.獲得原始對稱密鑰的字節數組
byte [] raw=original_key.getEncoded();
//5.根據字節數組生成AES密鑰
SecretKey key=new SecretKeySpec(raw, "AES");
//6.根據指定算法AES自成密碼器
Cipher cipher=Cipher.getInstance("AES");
//7.初始化密碼器,第一個參數爲加密(Encrypt_mode)或者解密解密(Decrypt_mode)操作,第二個參數爲使用的KEY
cipher.init(Cipher.ENCRYPT_MODE, key);
//8.獲取加密內容的字節數組(這裏要設置爲utf-8)不然內容中如果有中文和英文混合中文就會解密爲亂碼
byte [] byte_encode=content.getBytes("utf-8");
//9.根據密碼器的初始化方式--加密:將數據加密
byte [] byte_AES=cipher.doFinal(byte_encode);
//10.將加密後的數據轉換爲字符串
//這裏用Base64Encoder中會找不到包
//解決辦法:
//在項目的Build path中先移除JRE System Library,再添加庫JRE System Library,重新編譯後就一切正常了。
String AES_encode=new String(new BASE64Encoder().encode(byte_AES));
//11.將字符串返回
transResult.success();
transResult.setObject(AES_encode);
} catch (NoSuchAlgorithmException e) {
logger.error(e.getMessage(), e);
transResult.failure("算法異常:"+e.getMessage());
} catch (NoSuchPaddingException | BadPaddingException e) {
logger.error(e.getMessage(), e);
transResult.failure("填充異常:"+e.getMessage());
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
logger.error(e.getMessage(), e);
transResult.failure("密鑰塊超出異常:"+e.getMessage());
} catch (UnsupportedEncodingException e) {
logger.error(e.getMessage(), e);
transResult.failure("轉碼異常:"+e.getMessage());
}
//如果有錯就返加nulll
return transResult;
}
/*
* 解密
* 解密過程:
* 1.同加密1-4步
* 2.將加密後的字符串反紡成byte[]數組
* 3.將加密內容解密
*/
public static String AESDncode(String encodeRules,String content){
try {
//1.構造密鑰生成器,指定爲AES算法,不區分大小寫
KeyGenerator keygen=KeyGenerator.getInstance("AES");
//2.根據ecnodeRules規則初始化密鑰生成器
//生成一個128位的隨機源,根據傳入的字節數組
keygen.init(128, new SecureRandom(encodeRules.getBytes()));
//3.產生原始對稱密鑰
SecretKey original_key=keygen.generateKey();
//4.獲得原始對稱密鑰的字節數組
byte [] raw=original_key.getEncoded();
//5.根據字節數組生成AES密鑰
SecretKey key=new SecretKeySpec(raw, "AES");
//6.根據指定算法AES自成密碼器
Cipher cipher=Cipher.getInstance("AES");
//7.初始化密碼器,第一個參數爲加密(Encrypt_mode)或者解密(Decrypt_mode)操作,第二個參數爲使用的KEY
cipher.init(Cipher.DECRYPT_MODE, key);
//8.將加密並編碼後的內容解碼成字節數組
byte [] byte_content= new BASE64Decoder().decodeBuffer(content);
/*
* 解密
*/
byte [] byte_decode=cipher.doFinal(byte_content);
String AES_decode=new String(byte_decode,"utf-8");
return AES_decode;
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
}
//如果有錯就返加nulll
return null;
}
}