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工具类暂存

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jianjun 4 years ago
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  1. 389
      epmet-commons/epmet-commons-tools/src/main/java/com/epmet/commons/tools/utils/AuthCodeUtil.java

389
epmet-commons/epmet-commons-tools/src/main/java/com/epmet/commons/tools/utils/AuthCodeUtil.java
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package com.epmet.commons.tools.utils;
import lombok.extern.slf4j.Slf4j;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.*;
/**
* desc: 市北大数据局的工具
*
* @return
* @author LiuJanJun
* @date 2022/4/22 5:19 下午
*/
@Slf4j
public class AuthCodeUtil {
public enum DiscuzAuthcodeMode {
Encode, Decode
}
/**
* <summary>
* 从字符串的指定位置截取指定长度的子字符串
* </summary>
* <param name="str">原字符串</param>
* <param name="startIndex">子字符串的起始位置</param>
* <param name="length">子字符串的长度</param>
* <returns>子字符串</returns>
*/
public static String CutString(String str, int startIndex, int length) {
if (startIndex >= 0) {
if (length < 0) {
length = length * -1;
if (startIndex - length < 0) {
length = startIndex;
startIndex = 0;
} else {
startIndex = startIndex - length;
}
}
if (startIndex > str.length()) {
return "";
}
} else {
if (length < 0) {
return "";
} else {
if (length + startIndex > 0) {
length = length + startIndex;
startIndex = 0;
} else {
return "";
}
}
}
if (str.length() - startIndex < length) {
length = str.length() - startIndex;
}
return str.substring(startIndex, startIndex + length);
}
/**
* <summary>
* 从字符串的指定位置开始截取到字符串结尾的了符串
* </summary>
* <param name="str">原字符串</param>
* <param name="startIndex">子字符串的起始位置</param>
* <returns>子字符串</returns>
*/
public static String CutString(String str, int startIndex) {
return CutString(str, startIndex, str.length());
}
/**
* <summary>
* 返回文件是否存在
* </summary>
* <param name="filename">文件名</param>
* <returns>是否存在</returns>
*/
public static boolean FileExists(String filename) {
File f = new File(filename);
return f.exists();
}
/**
* <summary>
* MD5函数
* </summary>
* <param name="str">原始字符串</param>
* <returns>MD5结果</returns>
*/
public static String MD5(String str) {
StringBuffer sb = new StringBuffer();
String part = null;
try {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] md5 = md.digest(str.getBytes());
for (int i = 0; i < md5.length; i++) {
part = Integer.toHexString(md5[i] & 0xFF);
if (part.length() == 1) {
part = "0" + part;
}
sb.append(part);
}
} catch (NoSuchAlgorithmException ex) {
}
return sb.toString();
}
/**
* <summary>
* 字段串是否为Null或为""(空)
* </summary>
* <param name="str"></param>
* <returns></returns>
*/
public static boolean StrIsNullOrEmpty(String str) {
// if NET1
if (str == null || str.trim().equals("")) {
return true;
}
return false;
}
/**
* <summary>
* 用于 RC4 处理密码
* </summary>
* <param name="pass">密码字串</param>
* <param name="kLen">密钥长度，一般为 256</param>
* <returns></returns>
*/
static private byte[] GetKey(byte[] pass, int kLen) {
byte[] mBox = new byte[kLen];
for (int i = 0; i < kLen; i++) {
mBox[i] = (byte) i;
}
int j = 0;
for (int i = 0; i < kLen; i++) {
j = (j + (int) ((mBox[i] + 256) % 256) + pass[i % pass.length])
% kLen;
byte temp = mBox[i];
mBox[i] = mBox[j];
mBox[j] = temp;
}
return mBox;
}
/**
* <summary>
* 生成随机字符
* </summary>
* <param name="lens">随机字符长度</param>
* <returns>随机字符</returns>
*/
public static String RandomString(int lens) {
char[] CharArray = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j', 'k',
'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
int clens = CharArray.length;
String sCode = "";
Random random = new Random();
for (int i = 0; i < lens; i++) {
sCode += CharArray[Math.abs(random.nextInt(clens))];
}
return sCode;
}
/**
* <summary>
* 使用 Discuz authcode 方法对字符串加密
* </summary>
* <param name="source">原始字符串</param>
* <param name="key">密钥</param>
* <param name="expiry">加密字串有效时间，单位是秒</param>
* <returns>加密结果</returns>
*/
public static String authcodeEncode(String source, String key, int expiry) {
return authcode(source, key, DiscuzAuthcodeMode.Encode, expiry);
}
/**
* <summary>
* 使用 Discuz authcode 方法对字符串加密
* </summary>
* <param name="source">原始字符串</param>
* <param name="key">密钥</param>
* <returns>加密结果</returns>
*/
public static String authcodeEncode(String source, String key) {
return authcode(source, key, DiscuzAuthcodeMode.Encode, 0);
}
/**
* <summary>
* 使用 Discuz authcode 方法对字符串解密
* </summary>
* <param name="source">原始字符串</param>
* <param name="key">密钥</param>
* <returns>解密结果</returns>
*/
public static String authcodeDecode(String source, String key) {
return authcode(source, key, DiscuzAuthcodeMode.Decode, 0);
}
/**
* <summary>
* 使用 变形的 rc4 编码方法对字符串进行加密或者解密
* </summary>
* <param name="source">原始字符串</param>
* <param name="key">密钥</param>
* <param name="operation">操作 加密还是解密</param>
* <param name="expiry">加密字串过期时间</param>
* <returns>加密或者解密后的字符串</returns>
*/
private static String authcode(String source, String key,
DiscuzAuthcodeMode operation, int expiry) {
try {
if (source == null || key == null) {
return "";
}
int ckey_length = 4;
String keya, keyb, keyc, cryptkey, result;
key = MD5(key);
keya = MD5(CutString(key, 0, 16));
keyb = MD5(CutString(key, 16, 16));
keyc = ckey_length > 0 ? (operation == DiscuzAuthcodeMode.Decode ? CutString(
source, 0, ckey_length) : RandomString(ckey_length))
: "";
cryptkey = keya + MD5(keya + keyc);
if (operation == DiscuzAuthcodeMode.Decode) {
byte[] temp;
temp = Base64.getDecoder().decode(CutString(source, ckey_length));
result = new String(RC4(temp, cryptkey));
if (CutString(result, 10, 16).equals(
CutString(MD5(CutString(result, 26) + keyb), 0, 16))) {
return CutString(result, 26);
} else {
temp = Base64.getDecoder().decode(CutString(source + "=", ckey_length));
result = new String(RC4(temp, cryptkey));
if (CutString(result, 10, 16)
.equals(CutString(
MD5(CutString(result, 26) + keyb), 0, 16))) {
return CutString(result, 26);
} else {
temp = Base64.getDecoder().decode(CutString(source + "==",
ckey_length));
result = new String(RC4(temp, cryptkey));
if (CutString(result, 10, 16).equals(
CutString(MD5(CutString(result, 26) + keyb), 0,
16))) {
return CutString(result, 26);
} else {
return "2";
}
}
}
} else {
source = "0000000000" + CutString(MD5(source + keyb), 0, 16)
+ source;
byte[] temp = RC4(source.getBytes("GBK"), cryptkey);
return keyc + Base64.getEncoder().encode(temp);
}
} catch (Exception e) {
return "";
}
}
/**
* <summary>
* RC4 原始算法
* </summary>
* <param name="input">原始字串数组</param>
* <param name="pass">密钥</param>
* <returns>处理后的字串数组</returns>
*/
private static byte[] RC4(byte[] input, String pass) {
if (input == null || pass == null)
return null;
byte[] output = new byte[input.length];
byte[] mBox = GetKey(pass.getBytes(), 256);
// 加密
int i = 0;
int j = 0;
for (int offset = 0; offset < input.length; offset++) {
i = (i + 1) % mBox.length;
j = (j + (int) ((mBox[i] + 256) % 256)) % mBox.length;
byte temp = mBox[i];
mBox[i] = mBox[j];
mBox[j] = temp;
byte a = input[offset];
// byte b = mBox[(mBox[i] + mBox[j] % mBox.Length) % mBox.Length];
// mBox[j] 一定比 mBox.Length 小，不需要在取模
byte b = mBox[(toInt(mBox[i]) + toInt(mBox[j])) % mBox.length];
output[offset] = (byte) ((int) a ^ (int) toInt(b));
}
return output;
}
public static int toInt(byte b) {
return (int) ((b + 256) % 256);
}
public long getUnixTimestamp() {
Calendar cal = Calendar.getInstance();
return cal.getTimeInMillis() / 1000;
}
public static void main(String[] args) throws IOException {
getStr();
//readFile02("/Users/liujianjun/Downloads/abc.txt");
}
/**
* 读取一个文本 一行一行读取
*
* @param path
* @return
* @throws IOException
*/
private static void readFile02(String path) throws IOException {
// 使用一个字符串集合来存储文本中的路径 ，也可用String []数组
List<String> list = new ArrayList<String>();
FileInputStream fis = new FileInputStream(path);
// 防止路径乱码 如果utf-8 乱码 改GBK eclipse里创建的txt 用UTF-8，在电脑上自己创建的txt 用GBK
InputStreamReader isr = new InputStreamReader(fis, StandardCharsets.UTF_8);
BufferedReader br = new BufferedReader(isr);
String line = "";
String result = null;
while ((line = br.readLine()) != null) {
String key = "TvFwHe6tGA";
result = AuthCodeUtil.authcodeDecode(line, key);
System.out.println(result);
}
br.close();
isr.close();
fis.close();
System.out.println("==========end");
}
private static void getStr(){
String tel = "4fb1lYySlVqMUaf/LnlBEM1nDZgCKnX+Q52azUGgSLCV0hioBvLFFZoJS1Vu";
tel = "a1孙1增勤";
String result = AuthCodeUtil.authcodeDecode(tel, "TvFwHe6tGA");
System.out.println(result);
}
}
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