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package cn.zkdcloud.util;
import org.apache.log4j.Logger;
import java.io.IOException;
import java.util.*;
/**
* 接口认证
* Created by zk on 2016/10/30.
*/
public class WeChatUtil {
private static Logger logger = Logger.getLogger(WeChatUtil.class);
private static Properties weChatProperties = new Properties();
static {
try {
weChatProperties.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("wechat.properties"));
} catch (IOException e) {
logger.info("can't find wechat.properties");
}
}
/**
* 微信认证
*
* @param signature 签名
* @param timestamp 时间戳
* @param nonce 随机数
* @param echostr 随机字符串
* @return
*/
public static String confirm(String signature, String timestamp, String nonce, String echostr) {
List list = new ArrayList();
list.add(getToken());
list.add(timestamp);
list.add(nonce);
Collections.sort(list, new SpellComparator()); //排序
String temp = list.get(0) + list.get(1) + list.get(2);//拼接字符串
String digest = new SHA1().getDigestOfString(temp.getBytes());//sha1 校验并返回结果
return digest.equalsIgnoreCase(signature) == true ? echostr : "";
}
/**
* 字母默认排序
*/
public static class SpellComparator implements Comparator {
public int compare(Object o1, Object o2) {
try {
// 取得比较对象的汉字编码，并将其转换成字符串
String s1 = new String(o1.toString().getBytes("utf-8"), "utf-8");
String s2 = new String(o2.toString().getBytes("utf-8"), "utf-8");
// 运用String类的 compareTo（）方法对两对象进行比较
return s1.compareTo(s2);
} catch (Exception e) {
e.printStackTrace();
}
return 0;
}
}
/**
* SHA1 算法
*/
public static class SHA1 {
private final int[] abcde = {
0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0
};
private int[] digestInt = new int[5];
private int[] tmpData = new int[80];
private int process_input_bytes(byte[] bytedata) {
System.arraycopy(abcde, 0, digestInt, 0, abcde.length);
byte[] newbyte = byteArrayFormatData(bytedata);
int MCount = newbyte.length / 64;
for (int pos = 0; pos < MCount; pos++) {
for (int j = 0; j < 16; j++) {
tmpData[j] = byteArrayToInt(newbyte, (pos * 64) + (j * 4));
}
encrypt();
}
return 20;
}
private byte[] byteArrayFormatData(byte[] bytedata) {
int zeros = 0;
int size = 0;
int n = bytedata.length;
int m = n % 64;
if (m < 56) {
zeros = 55 - m;
size = n - m + 64;
} else if (m == 56) {
zeros = 63;
size = n + 8 + 64;
} else {
zeros = 63 - m + 56;
size = (n + 64) - m + 64;
}
byte[] newbyte = new byte[size];
System.arraycopy(bytedata, 0, newbyte, 0, n);
int l = n;
newbyte[l++] = (byte) 0x80;
for (int i = 0; i < zeros; i++) {
newbyte[l++] = (byte) 0x00;
}
long N = (long) n * 8;
byte h8 = (byte) (N & 0xFF);
byte h7 = (byte) ((N >> 8) & 0xFF);
byte h6 = (byte) ((N >> 16) & 0xFF);
byte h5 = (byte) ((N >> 24) & 0xFF);
byte h4 = (byte) ((N >> 32) & 0xFF);
byte h3 = (byte) ((N >> 40) & 0xFF);
byte h2 = (byte) ((N >> 48) & 0xFF);
byte h1 = (byte) (N >> 56);
newbyte[l++] = h1;
newbyte[l++] = h2;
newbyte[l++] = h3;
newbyte[l++] = h4;
newbyte[l++] = h5;
newbyte[l++] = h6;
newbyte[l++] = h7;
newbyte[l++] = h8;
return newbyte;
}
private int f1(int x, int y, int z) {
return (x & y) | (~x & z);
}
private int f2(int x, int y, int z) {
return x ^ y ^ z;
}
private int f3(int x, int y, int z) {
return (x & y) | (x & z) | (y & z);
}
private int f4(int x, int y) {
return (x << y) | x >>> (32 - y);
}
private void encrypt() {
for (int i = 16; i <= 79; i++) {
tmpData[i] = f4(tmpData[i - 3] ^ tmpData[i - 8] ^ tmpData[i - 14] ^
tmpData[i - 16], 1);
}
int[] tmpabcde = new int[5];
for (int i1 = 0; i1 < tmpabcde.length; i1++) {
tmpabcde[i1] = digestInt[i1];
}
for (int j = 0; j <= 19; j++) {
int tmp = f4(tmpabcde[0], 5) +
f1(tmpabcde[1], tmpabcde[2], tmpabcde[3]) + tmpabcde[4] +
tmpData[j] + 0x5a827999;
tmpabcde[4] = tmpabcde[3];
tmpabcde[3] = tmpabcde[2];
tmpabcde[2] = f4(tmpabcde[1], 30);
tmpabcde[1] = tmpabcde[0];
tmpabcde[0] = tmp;
}
for (int k = 20; k <= 39; k++) {
int tmp = f4(tmpabcde[0], 5) +
f2(tmpabcde[1], tmpabcde[2], tmpabcde[3]) + tmpabcde[4] +
tmpData[k] + 0x6ed9eba1;
tmpabcde[4] = tmpabcde[3];
tmpabcde[3] = tmpabcde[2];
tmpabcde[2] = f4(tmpabcde[1], 30);
tmpabcde[1] = tmpabcde[0];
tmpabcde[0] = tmp;
}
for (int l = 40; l <= 59; l++) {
int tmp = f4(tmpabcde[0], 5) +
f3(tmpabcde[1], tmpabcde[2], tmpabcde[3]) + tmpabcde[4] +
tmpData[l] + 0x8f1bbcdc;
tmpabcde[4] = tmpabcde[3];
tmpabcde[3] = tmpabcde[2];
tmpabcde[2] = f4(tmpabcde[1], 30);
tmpabcde[1] = tmpabcde[0];
tmpabcde[0] = tmp;
}
for (int m = 60; m <= 79; m++) {
int tmp = f4(tmpabcde[0], 5) +
f2(tmpabcde[1], tmpabcde[2], tmpabcde[3]) + tmpabcde[4] +
tmpData[m] + 0xca62c1d6;
tmpabcde[4] = tmpabcde[3];
tmpabcde[3] = tmpabcde[2];
tmpabcde[2] = f4(tmpabcde[1], 30);
tmpabcde[1] = tmpabcde[0];
tmpabcde[0] = tmp;
}
for (int i2 = 0; i2 < tmpabcde.length; i2++) {
digestInt[i2] = digestInt[i2] + tmpabcde[i2];
}
for (int n = 0; n < tmpData.length; n++) {
tmpData[n] = 0;
}
}
private int byteArrayToInt(byte[] bytedata, int i) {
return ((bytedata[i] & 0xff) << 24) | ((bytedata[i + 1] & 0xff) << 16) |
((bytedata[i + 2] & 0xff) << 8) | (bytedata[i + 3] & 0xff);
}
private void intToByteArray(int intValue, byte[] byteData, int i) {
byteData[i] = (byte) (intValue >>> 24);
byteData[i + 1] = (byte) (intValue >>> 16);
byteData[i + 2] = (byte) (intValue >>> 8);
byteData[i + 3] = (byte) intValue;
}
private String byteToHexString(byte ib) {
char[] Digit = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C',
'D', 'E', 'F'
};
char[] ob = new char[2];
ob[0] = Digit[(ib >>> 4) & 0X0F];
ob[1] = Digit[ib & 0X0F];
String s = new String(ob);
return s;
}
private String byteArrayToHexString(byte[] bytearray) {
String strDigest = "";
for (int i = 0; i < bytearray.length; i++) {
strDigest += byteToHexString(bytearray[i]);
}
return strDigest;
}
public byte[] getDigestOfBytes(byte[] byteData) {
process_input_bytes(byteData);
byte[] digest = new byte[20];
for (int i = 0; i < digestInt.length; i++) {
intToByteArray(digestInt[i], digest, i * 4);
}
return digest;
}
public String getDigestOfString(byte[] byteData) {
return byteArrayToHexString(getDigestOfBytes(byteData));
}
}
/**
* 读取token
* @return token
*/
public static String getToken(){
return weChatProperties.getProperty("token");
}
/**
* 读取appId
* @return appId
*/
public static String getAppId(){
return weChatProperties.getProperty("app_id");
}
/**
* 读取appSecret
* @return appSecret
*/
public static String getAppSecret(){
return weChatProperties.getProperty("app_secret");
}
}
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