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微信公共平臺(tái)驗(yàn)證接口JAVA實(shí)現(xiàn)

世紀(jì)華聯(lián) | 2018-01-26 23:53:52 | 閱讀:14555

看到微信的公共平臺(tái)接入文檔接口驗(yàn)證的例子是PHP寫(xiě)的，對(duì)于很多不是做php的人來(lái)說(shuō)有點(diǎn)麻煩，雖然編程思想是相同的，邏輯也很簡(jiǎn)單，但是一種語(yǔ)言有一種語(yǔ)言的語(yǔ)法規(guī)范，其實(shí)代碼的編寫(xiě)還是差距挺大的。這里寫(xiě)一下JAVA版接口驗(yàn)證的實(shí)現(xiàn)。

response.setContentType("text/html");
PrintWriter out = response.getWriter();
String signature = request.getParameter("signature");
String timestamp = request.getParameter("timestamp");
String nonce = request.getParameter("nonce");
String echostr = request.getParameter("echostr");
String reSignature = null;
try {
String[] str = { TOKEN, timestamp, nonce };
Arrays.sort(str);
String bigStr = str[0] + str[1] + str[2];
reSignature = new SHA1().getDigestOfString(bigStr.getBytes())
.toLowerCase();
} catch (Exception e) {
e.printStackTrace();
}
if (null != reSignature && reSignature.equals(signature)) {
//請(qǐng)求來(lái)自微信
out.print(echostr);
} else {
out.print("error request! the request is not from weixin server");
}
out.flush();
out.close();

復(fù)制代碼

邏輯代碼就這些，就是按照文檔上說(shuō)的來(lái)：
1. 將token、timestamp、nonce三個(gè)參數(shù)進(jìn)行字典序排序
2. 將三個(gè)參數(shù)字符串拼接成一個(gè)字符串進(jìn)行sha1加密
3. 開(kāi)發(fā)者獲得加密后的字符串可與signature對(duì)比，標(biāo)識(shí)該請(qǐng)求來(lái)源于微信

上面代碼中有一個(gè)工具類(lèi)SHA1，就是實(shí)現(xiàn)了一個(gè)加密解密算法，網(wǎng)上也有，這里貼一下代碼。

package duanqing.test.servlet.tools;
public class SHA1 {
private final int[] abcde = { 0x67452301, 0xefcdab89, 0x98badcfe,
0x10325476, 0xc3d2e1f0 };
// 摘要數(shù)據(jù)存儲(chǔ)數(shù)組
private int[] digestInt = new int[5];
// 計(jì)算過(guò)程中的臨時(shí)數(shù)據(jù)存儲(chǔ)數(shù)組
private int[] tmpData = new int[80];
// 計(jì)算sha-1摘要
private int process_input_bytes(byte[] bytedata) {
// 初試化常量
System.arraycopy(abcde, 0, digestInt, 0, abcde.length);
// 格式化輸入字節(jié)數(shù)組，補(bǔ)10及長(zhǎng)度數(shù)據(jù)
byte[] newbyte = byteArrayFormatData(bytedata);
// 獲取數(shù)據(jù)摘要計(jì)算的數(shù)據(jù)單元個(gè)數(shù)
int MCount = newbyte.length / 64;
// 循環(huán)對(duì)每個(gè)數(shù)據(jù)單元進(jìn)行摘要計(jì)算
for (int pos = 0; pos < MCount; pos++) {
// 將每個(gè)單元的數(shù)據(jù)轉(zhuǎn)換成16個(gè)整型數(shù)據(jù)，并保存到tmpData的前16個(gè)數(shù)組元素中
for (int j = 0; j < 16; j++) {
tmpData[j] = byteArrayToInt(newbyte, (pos * 64) + (j * 4));
}
// 摘要計(jì)算函數(shù)
encrypt();
}
return 20;
}
// 格式化輸入字節(jié)數(shù)組格式
private byte[] byteArrayFormatData(byte[] bytedata) {
// 補(bǔ)0數(shù)量
int zeros = 0;
// 補(bǔ)位后總位數(shù)
int size = 0;
// 原始數(shù)據(jù)長(zhǎng)度
int n = bytedata.length;
// 模64后的剩余位數(shù)
int m = n % 64;
// 計(jì)算添加0的個(gè)數(shù)以及添加10后的總長(zhǎng)度
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;
}
// 補(bǔ)位后生成的新數(shù)組內(nèi)容
byte[] newbyte = new byte[size];
// 復(fù)制數(shù)組的前面部分
System.arraycopy(bytedata, 0, newbyte, 0, n);
// 獲得數(shù)組Append數(shù)據(jù)元素的位置
int l = n;
// 補(bǔ)1操作
newbyte[l++] = (byte) 0x80;
// 補(bǔ)0操作
for (int i = 0; i < zeros; i++) {
newbyte[l++] = (byte) 0x00;
}
// 計(jì)算數(shù)據(jù)長(zhǎng)度，補(bǔ)數(shù)據(jù)長(zhǎng)度位共8字節(jié)，長(zhǎng)整型
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);
}
// 單元摘要計(jì)算函數(shù)
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;
}
}
// 4字節(jié)數(shù)組轉(zhuǎn)換為整數(shù)
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);
}
// 整數(shù)轉(zhuǎn)換為4字節(jié)數(shù)組
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;
}
// 將字節(jié)轉(zhuǎn)換為十六進(jìn)制字符串
private static 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;
}
// 將字節(jié)數(shù)組轉(zhuǎn)換為十六進(jìn)制字符串
private static String byteArrayToHexString(byte[] bytearray) {
String strDigest = "";
for (int i = 0; i < bytearray.length; i++) {
strDigest += byteToHexString(bytearray[i]);
}
return strDigest;
}
// 計(jì)算sha-1摘要，返回相應(yīng)的字節(jié)數(shù)組
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;
}
// 計(jì)算sha-1摘要，返回相應(yīng)的十六進(jìn)制字符串
public String getDigestOfString(byte[] byteData) {
return byteArrayToHexString(getDigestOfBytes(byteData));
}
public static void main(String[] args) {
String data = "123456";
System.out.println(data);
String digest = new SHA1().getDigestOfString(data.getBytes()).toLowerCase();
System.out.println(digest);
// System.out.println( ToMD5.convertSHA1(data).toUpperCase());
}
}

復(fù)制代碼

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