微信 SHA1 加密方式实体

 

public class SHA1 {

private final int[] abcde = { 0x67452301, 0xefcdab89, 0x98badcfe,

0x10325476, 0xc3d2e1f0 };

// 摘要数据存储数组

private int[] digestInt = new int[5];

// 计算过程中的临时数据存储数组

private int[] tmpData = new int[80];

 

// 计算sha-1摘要

private int process_input_bytes(byte[] bytedata) {

// 初试化常量

System.arraycopy(abcde, 0, digestInt, 0, abcde.length);

// 格式化输入字节数组，补10及长度数据

byte[] newbyte = byteArrayFormatData(bytedata);

// 获取数据摘要计算的数据单元个数

int MCount = newbyte.length / 64;

// 循环对每个数据单元进行摘要计算

for (int pos = 0; pos < MCount; pos++) {

// 将每个单元的数据转换成16个整型数据，并保存到tmpData的前16个数组元素中

for (int j = 0; j < 16; j++) {

tmpData[j] = byteArrayToInt(newbyte, (pos * 64) + (j * 4));

}

// 摘要计算函数

encrypt();

}

return 20;

}

 

// 格式化输入字节数组格式

private byte[] byteArrayFormatData(byte[] bytedata) {

// 补0数量

int zeros = 0;

// 补位后总位数

int size = 0;

// 原始数据长度

int n = bytedata.length;

// 模64后的剩余位数

int m = n % 64;

// 计算添加0的个数以及添加10后的总长度

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;

}

// 补位后生成的新数组内容

byte[] newbyte = new byte[size];

// 复制数组的前面部分

System.arraycopy(bytedata, 0, newbyte, 0, n);

// 获得数组Append数据元素的位置

int l = n;

// 补1操作

newbyte[l++] = (byte) 0x80;

// 补0操作

for (int i = 0; i < zeros; i++) {

newbyte[l++] = (byte) 0x00;

}

// 计算数据长度，补数据长度位共8字节，长整型

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);

}

 

// 单元摘要计算函数

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字节数组转换为整数

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);

}

 

// 整数转换为4字节数组

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;

}

 

// 将字节转换为十六进制字符串

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;

}

 

// 将字节数组转换为十六进制字符串

private static String byteArrayToHexString(byte[] bytearray) {

String strDigest = "";

for (int i = 0; i < bytearray.length; i++) {

strDigest += byteToHexString(bytearray[i]);

}

return strDigest;

}

 

// 计算sha-1摘要，返回相应的字节数组

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;

}

 

// 计算sha-1摘要，返回相应的十六进制字符串

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());

System.out.println(digest);

 

// System.out.println( ToMD5.convertSHA1(data).toUpperCase());

}

}

 

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