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签到天数: 2 天 [LV.1]初来乍到
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- 来源:http://blog.csdn.net/zyg158/archive/2007/06/26/1667531.aspx
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- 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 = "1";
- System.out.println(data);
- String digest = new SHA1().getDigestOfString(data.getBytes());
- System.out.println(digest);
- }
- }
复制代码 运行结果:
C: est>java SHA1
1
356A192B7913B04C54574D18C28D46E6395428AB
源码下载:http://file.javaxxz.com/2014/11/6/000321312.zip |
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