java 整合Ucenter （authcode）函数的算法
自己用java整合ucenter，发现网上的都不能用。看看下php的authcode，照着写了下，发现怎么写都会有个bug，请高手搞一下。---接口package com.hq.encryptor;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.URLDecoder;import java.net.URLEncoder;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;import com.hq.encryptor.iface.PasswordEnDe;/** * Ucenter论坛可逆加密算法 * bug:解密后的字符串可能多一个或者2个字符。谁解决了请发我信箱supttkl@163.com * @author GAO **/public class UcenterPasswordEncryptor implements PasswordEnDe {// 密钥字符串private String ENCRYPTOR_KEY = "1234567890";private BASE64Decoder decoder = new BASE64Decoder();private BASE64Encoder encoder = new BASE64Encoder();public UcenterPasswordEncryptor() {}/** * @param key 密钥 */public UcenterPasswordEncryptor(String key) {this.ENCRYPTOR_KEY = key;}// 加密public String encrypt(String password) {try {password=URLEncoder.encode(password, "UTF-8");//支持中文String key = ENCRYPTOR_KEY;int ckey_length = 4;key = getMd5String(key);String keya = getMd5String(key.substring(0, 16));String keyb = getMd5String(key.substring(16, 32));String min = String.valueOf(System.currentTimeMillis());min = "0.00000000 " + min.substring(0, min.length() - 3);String keyc = ckey_length > 0 ? getMd5String(String.valueOf(min)): "";keyc = keyc.substring(keyc.length() - 4, keyc.length());String cryptkey = keya + getMd5String(keya + keyc);int key_length = cryptkey.length();byte[] temp = null;String str_temp = "0000000000"+ getMd5String(password + keyb).substring(0, 16) + password;temp = str_temp.getBytes("UTF-8");int[] box = new int;for (int i = 0; i < box.length; i++) {box = i;}char[] rndkey = new char;for (int i = 0; i <= 255; i++) {rndkey = cryptkey.charAt(i % key_length);}for (int j = 0, i = 0; i < 256; i++) {j = (j + box + (int) rndkey) % 256;int tmp = box;box = box;box = tmp;}for (int a = 0, j = 0, i = 0; i < temp.length; i++) {a = (a + 1) % 256;j = (j + box) % 256;int tmp = box;box = box;box = tmp;int gao = (int) temp;byte c = (byte) (gao ^ (box[(box + box) % 256]));temp = c;}ByteArrayOutputStream bytearrayoutputstream = new ByteArrayOutputStream();ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(temp);encoder.encode(((InputStream) (bytearrayinputstream)),((OutputStream) (bytearrayoutputstream)));String s = bytearrayoutputstream.toString();return keyc + s.replace("=", "");} catch (NoSuchAlgorithmException e) {throw new RuntimeException(e);} catch (IOException e) {throw new RuntimeException(e);}}private String getMd5String(String password)throws NoSuchAlgorithmException {MessageDigest md = MessageDigest.getInstance("MD5");byte[] input = md.digest(password.getBytes());String hex = byteToHexString(input);return hex;}private String byteToHexString(byte[] res) {StringBuffer sb = new StringBuffer(res.length << 1);for (int i = 0; i < res.length; i++) {String digit = Integer.toHexString(0xFF & res);if (digit.length() == 1) {digit = '0' + digit;}sb.append(digit);}return sb.toString();}//public boolean matches(String passwordToCheck, String storedPassword) {if(storedPassword == null) { throw new NullPointerException("storedPassword can not be null"); } if(passwordToCheck == null) { throw new NullPointerException("passwordToCheck can not be null"); } return encrypt(passwordToCheck).equals(storedPassword);}// 解密public String decrypt(String password) {try {int ckey_length = 4;String key = getMd5String(ENCRYPTOR_KEY);String keya = getMd5String(key.substring(0, 16));String min = String.valueOf(System.currentTimeMillis());min = "0.00000000 " + min.substring(0, min.length() - 3);String keyc = ckey_length > 0 ? password.substring(0, ckey_length): "";String cryptkey = keya + getMd5String(keya + keyc);int key_length = cryptkey.length();byte[] temp = null;if(true){//这步为出bug的地方String t1 = password.substring(ckey_length, password.length()); ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(t1.getBytes("UTF-8")); ByteArrayOutputStream bytearrayoutputstream = new ByteArrayOutputStream(); decoder.decodeBuffer(((InputStream) (bytearrayinputstream)), ((OutputStream) (bytearrayoutputstream))); temp=bytearrayoutputstream.toByteArray();} int[] box=new int;for (int i = 0; i <box.length; i++) {box = i;}char[] rndkey = new char;for (int i = 0; i <= 255; i++) {rndkey = cryptkey.charAt(i % key_length);}for (int j = 0, i = 0; i < 256; i++) {j = (j + box + (int) rndkey) % 256;int tmp = box;box = box;box = tmp;}StringBuffer sb = new StringBuffer();for(int a =0, j=0, i = 0; i < temp.length; i++) {a = (a + 1) % 256;j = (j + box) % 256;int tmp = box;box = box;box = tmp;int gao=(int)temp<0? (int)temp+256:(int)temp;char c =(char)(gao ^ (box[(box + box) % 256]));sb.append(c);}String lastStr= sb.substring(26, sb.length());return URLDecoder.decode(lastStr, "UTF-8");} catch (IOException e) {throw new RuntimeException(e);} catch (NoSuchAlgorithmException e) {throw new RuntimeException(e);}}}
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