import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.List;
/**
* 加密字符串
*/
public class StringProcX {
/**
* 密钥
*/
private static String enc_key = "FBsolTOqSN8JY$3%";
/**
* 有效期（秒），为0表示不过期
*/
public static int expiry = 10*60;
public static enum procMode {
Encode, Decode
};
private static char[] base64EncodeChars = new char[]{
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', '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', '+', '/'};
private static byte[] base64DecodeChars = new byte[]{
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
-1, 0, 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, -1, -1, -1, -1, -1,
-1, 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, -1, -1, -1, -1, -1};
private static String base64_encode(byte[] data) {
StringBuffer sb = new StringBuffer();
int len = data.length;
int i = 0;
int b1, b2, b3;
while (i < len) {
b1 = data[i++] & 0xff;
if (i == len) {
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[(b1 & 0x3) << 4]);
sb.append("==");
break;
}
b2 = data[i++] & 0xff;
if (i == len) {
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
sb.append(base64EncodeChars[(b2 & 0x0f) << 2]);
sb.append("=");
break;
}
b3 = data[i++] & 0xff;
sb.append(base64EncodeChars[b1 >>> 2]);
sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
sb.append(base64EncodeChars[((b2 & 0x0f) << 2) | ((b3 & 0xc0) >>> 6)]);
sb.append(base64EncodeChars[b3 & 0x3f]);
}
return sb.toString();
}
private static byte[] base64_decode(String str) throws UnsupportedEncodingException {
int remainder = str.length()%4;
if(remainder == 2){
str = str + "==";
}else if(remainder == 3){
str = str + "=";
}
StringBuffer sb = new StringBuffer();
byte[] data = str.getBytes("US-ASCII");
int len = data.length;
int i = 0;
int b1, b2, b3, b4;
while (i < len) {
do {
b1 = base64DecodeChars[data[i++]];
} while (i < len && b1 == -1);
if (b1 == -1)
break;
do {
b2 = base64DecodeChars[data[i++]];
} while (i < len && b2 == -1);
if (b2 == -1)
break;
sb.append((char) ((b1 << 2) | ((b2 & 0x30) >>> 4)));
do {
b3 = data[i++];
if (b3 == 61) return sb.toString().getBytes("iso8859-1");
b3 = base64DecodeChars[b3];
} while (i < len && b3 == -1);
if (b3 == -1)
break;
sb.append((char) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2)));
do {
b4 = data[i++];
if (b4 == 61)
return sb.toString().getBytes("iso8859-1");
b4 = base64DecodeChars[b4];
} while (i < len && b4 == -1);
if (b4 == -1)
break;
sb.append((char) (((b3 & 0x03) << 6) | b4));
}
return sb.toString().getBytes("iso8859-1");
}
private 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);
}
private static String cutString(String str, int startIndex) {
return cutString(str, startIndex, str.length());
}
private static String getTimeStamp(){
return String.format("%010d",System.currentTimeMillis()/1000);
}
private static String md5_Hash(String md5_String) {
StringBuffer sb = new StringBuffer();
String part = null;
try {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] md5 = md.digest(md5_String.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();
}
private static short[] byteToShort(byte[] src){
short[] ret = new short[src.length];
for(int i=0; i<src.length; i++){
ret[i] = src[i]>0 ? (short)src[i] : (short)((short)255 - (short)(~src[i]));
}
return ret;
}
private static byte[] listToByte(List<Integer> src){
byte[] ret = new byte[src.size()];
for(int i=0; i<src.size(); i++){
ret[i] = (byte)(int)src.get(i);
}
return ret;
}
public static String procX(String string, procMode operation) throws UnsupportedEncodingException{
int ckey_length = 4;
String key = md5_Hash(md5_Hash(enc_key)); //两轮MD5，防止无聊人士通过彩虹表穷举...
String keya = md5_Hash(cutString(key, 0, 16));
String keyb = md5_Hash(cutString(key, 16, 16));
string = string.replace("[a]", "+");
string = string.replace("[d]", "/");
string = string.replace("[s]", "=");
String tt = md5_Hash(getTimeStamp());
String keyc = ckey_length > 0 ? (operation == procMode.Decode ? cutString(string, 0, ckey_length): cutString(tt, tt.length()-ckey_length)) : "";
//String keyc = ckey_length > 0 ? (operation == procMode.Decode ? cutString(string, 0, ckey_length): "long" ) : "";
String cryptkey = keya + md5_Hash(keya + keyc);
int key_length = cryptkey.length();
List<Integer> array = new ArrayList<Integer>();
int string_length = 0;
List<Integer> result = new ArrayList<Integer>();
if(operation == procMode.Decode){
byte[] btArray = base64_decode(cutString(string, ckey_length));
short[] normal = byteToShort(btArray);
string_length = normal.length;
for(int i=0; i<normal.length; i++){
array.add((int) normal[i]);
}
}else{
String verify = string + keyb;
long ts = Integer.parseInt(getTimeStamp(),10);
String tmp = String.format("%010d%s%s", expiry>0 ? ts+expiry : 0, cutString(md5_Hash(verify), 0, 16), string);
short[] normal = byteToShort(tmp.getBytes("UTF-8"));
string_length = normal.length;
for(int j=0; j<normal.length; j++){
array.add((int) normal[j]);
}
}
int[] box = new int[256];
int[] rndkey = new int[256];
for(int i = 0; i <= 255; i++) {
box[i] = i;
int pos = i % key_length;
byte p = (byte)cryptkey.substring(pos, pos+1).getBytes()[0];
int tmp = p >= 0 ? (int)p : (int)(255 - (int)(~p));
rndkey[i] = tmp;
}
int j=0;
for(int i=0; i<256; i++){
j = (j + box[i] + rndkey[i]) % 256;
int tmp = box[i];
box[i] = box[j];
box[j] = tmp;
}
int a = j = 0;
for(int i=0; i<string_length; i++){
a = (a + 1) % 256;
j = (j + box[a]) % 256;
int tmp = box[a];
box[a] = box[j];
box[j] = tmp;
int kx = array.get(i) ^ box[(box[a] + box[j]) %256];
result.add(kx);
}
if(operation == procMode.Decode) {
//把result转为字符串
byte[] ret = new byte[result.size()];
for(int i=0; i<result.size(); i++){
ret[i] = (byte)(int)result.get(i);
}
byte[] toDecode = listToByte(result);
String strDecode = new String(toDecode);
//校验解密结果，符合要求则输出
try {
long ts = Integer.parseInt(cutString(strDecode, 0, 10),10);
long now = Integer.parseInt(getTimeStamp(),10);
String verify = cutString(strDecode, 10, 16);
String hash = cutString(md5_Hash(cutString(strDecode, 26) + keyb), 0, 16);
if((ts==0 || ts-now>0) && (verify.equals(hash))){
return cutString(strDecode, 26);
}else{
return "";
}
} catch (Exception e) {
return "";
}
} else {
//把result转为byte[]，进行 BASE64 编码
byte[] toEncode = listToByte(result);
String ret = base64_encode(toEncode);
//替换掉可能导致问题的字符
ret = ret.replace("+", "[a]");
ret = ret.replace("/", "[d]");
ret = ret.replace("=", "[s]");
return keyc + ret;
}
}
public static void main(String[] args) {
try {
String strOrigin = "aa";
System.out.println("Before:" + strOrigin);
String enStr = StringProcX.procX(strOrigin, procMode.Encode);
System.out.println("AfterX:" + enStr);
enStr = "5e8b5Ibmi[a]ksT6ijK3[d]Vf6xKL9BlQwK[d]mqA5qyR7TQ[s][s]";
String deStr = StringProcX.procX(enStr, procMode.Decode);
System.out.println("Decode:" + deStr);
} catch (Exception e) {
e.printStackTrace();
}
}
}authcode2:
import org.apache.commons.codec.binary.Base64;
import java.io.File;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Calendar;
import java.util.Random;
public class AuthCode {
public enum DiscuzAuthcodeMode {
Encode, Decode
};
// private static MD5 md5 = new MD5();
// private static BASE64 base64 = new BASE64();
// / <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) {
// return md5.convert(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) {
System.out.println("--------source:" + source);
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;
String tstr = CutString(source, ckey_length);
System.out.println(" CutString(source, ckey_length):" + CutString(source, ckey_length));
temp = Base64.decodeBase64(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.decodeBase64(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.decodeBase64(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.encodeBase64String(temp);
}
} catch (Exception e) {
e.printStackTrace();
return "==aaaa==";
}
}
// / <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) {
String test = "111aaaaaaaaaaaaaaaaaaaf" +
"" +
"";
String key = "eafdf6";
String afStr = AuthCode.authcodeEncode(test, key);
System.out.println("--------encode:" + afStr);
long lStart = System.currentTimeMillis();
System.out.println("解码后：" + AuthCode.authcodeDecode(afStr, key));
long lUseTime = System.currentTimeMillis() - lStart;
System.out.println("加解密耗时：" + lUseTime + "毫秒");
}
} 【好东西】java版本仿DISCUZ加解密带失效时间