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MD5.java
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package com.kai;
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/** *//*************************************************
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md5 类实现了RSA Data Security, Inc.在提交给IETF
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的RFC1321中的MD5 message-digest 算法。
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*************************************************/
6![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
7![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
public class MD5
{
8![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* 下面这些S11-S44实际上是一个4*4的矩阵,在原始的C实现中是用#define 实现的,
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这里把它们实现成为static final是表示了只读,切能在同一个进程空间内的多个
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Instance间共享*/
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static final int S11 = 7;
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static final int S12 = 12;
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static final int S13 = 17;
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static final int S14 = 22;
15![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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static final int S21 = 5;
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static final int S22 = 9;
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static final int S23 = 14;
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static final int S24 = 20;
20![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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static final int S31 = 4;
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static final int S32 = 11;
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static final int S33 = 16;
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static final int S34 = 23;
25![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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static final int S41 = 6;
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static final int S42 = 10;
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static final int S43 = 15;
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static final int S44 = 21;
30![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
31![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
static final byte[] PADDING =
{ -128, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
35![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* 下面的三个成员是MD5计算过程中用到的3个核心数据,在原始的C实现中
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被定义到MD5_CTX结构中
37![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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*/
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private long[] state = new long[4]; // state (ABCD)
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private long[] count = new long[2]; // number of bits, modulo 2^64 (lsb first)
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private byte[] buffer = new byte[64]; // input buffer
42![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
43![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* digestHexStr是MD5的唯一一个公共成员,是最新一次计算结果的
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16进制ASCII表示.
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*/
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public String digestHexStr;
47![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
48![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* digest,是最新一次计算结果的2进制内部表示,表示128bit的MD5值.
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*/
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private byte[] digest = new byte[16];
51![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
52![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//*
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getMD5ofStr是类MD5最主要的公共方法,入口参数是你想要进行MD5变换的字符串
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返回的是变换完的结果,这个结果是从公共成员digestHexStr取得的.
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*/
56![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
public String getMD5ofStr(String inbuf)
{
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md5Init();
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md5Update(inbuf.getBytes(), inbuf.length());
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md5Final();
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digestHexStr = "";
61![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
for (int i = 0; i < 16; i++)
{
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digestHexStr += byteHEX(digest[i]);
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}
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return digestHexStr;
65![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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}
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// 这是MD5这个类的标准构造函数,JavaBean要求有一个public的并且没有参数的构造函数
68![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
public MD5()
{
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md5Init();
70![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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return;
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}
73![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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75![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
76![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* md5Init是一个初始化函数,初始化核心变量,装入标准的幻数 */
77![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private void md5Init()
{
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count[0] = 0L;
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count[1] = 0L;
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///* Load magic initialization constants.
81![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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state[0] = 0x67452301L;
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state[1] = 0xefcdab89L;
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state[2] = 0x98badcfeL;
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state[3] = 0x10325476L;
86![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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return;
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}
89![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* F, G, H ,I 是4个基本的MD5函数,在原始的MD5的C实现中,由于它们是
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简单的位运算,可能出于效率的考虑把它们实现成了宏,在java中,我们把它们
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实现成了private方法,名字保持了原来C中的。 */
92![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
93![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private long F(long x, long y, long z)
{
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return (x & y) | ((~x) & z);
95![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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}
97![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private long G(long x, long y, long z)
{
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return (x & z) | (y & (~z));
99![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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}
101![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private long H(long x, long y, long z)
{
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return x ^ y ^ z;
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}
104![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
105![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private long I(long x, long y, long z)
{
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return y ^ (x | (~z));
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}
108![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
109![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//*
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FF,GG,HH和II将调用F,G,H,I进行近一步变换
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FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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Rotation is separate from addition to prevent recomputation.
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*/
114![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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private long FF(long a, long b, long c, long d, long x, long s,
116![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
long ac)
{
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a += F (b, c, d) + x + ac;
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a = ((int) a << s) | ((int) a >>> (32 - s));
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a += b;
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return a;
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}
122![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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private long GG(long a, long b, long c, long d, long x, long s,
124![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
long ac)
{
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a += G (b, c, d) + x + ac;
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a = ((int) a << s) | ((int) a >>> (32 - s));
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a += b;
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return a;
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}
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private long HH(long a, long b, long c, long d, long x, long s,
131![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
long ac)
{
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a += H (b, c, d) + x + ac;
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a = ((int) a << s) | ((int) a >>> (32 - s));
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a += b;
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return a;
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}
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private long II(long a, long b, long c, long d, long x, long s,
138![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
long ac)
{
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a += I (b, c, d) + x + ac;
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a = ((int) a << s) | ((int) a >>> (32 - s));
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a += b;
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return a;
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}
144![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//*
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md5Update是MD5的主计算过程,inbuf是要变换的字节串,inputlen是长度,这个
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函数由getMD5ofStr调用,调用之前需要调用md5init,因此把它设计成private的
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*/
148![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private void md5Update(byte[] inbuf, int inputLen)
{
149![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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int i, index, partLen;
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byte[] block = new byte[64];
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index = (int)(count[0] >>> 3) & 0x3F;
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// /* Update number of bits */
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if ((count[0] += (inputLen << 3)) < (inputLen << 3))
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count[1]++;
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count[1] += (inputLen >>> 29);
157![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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partLen = 64 - index;
159![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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// Transform as many times as possible.
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if (inputLen >= partLen)
{
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md5Memcpy(buffer, inbuf, index, 0, partLen);
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md5Transform(buffer);
164![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
165![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
for (i = partLen; i + 63 < inputLen; i += 64)
{
166![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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md5Memcpy(block, inbuf, 0, i, 64);
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md5Transform (block);
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}
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index = 0;
171![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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} else
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i = 0;
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///* Buffer remaining input */
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md5Memcpy(buffer, inbuf, index, i, inputLen - i);
178![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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}
180![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
181![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//*
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md5Final整理和填写输出结果
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*/
184![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private void md5Final ()
{
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byte[] bits = new byte[8];
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int index, padLen;
187![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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///* Save number of bits */
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Encode (bits, count, 8);
190![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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///* Pad out to 56 mod 64.
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index = (int)(count[0] >>> 3) & 0x3f;
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padLen = (index < 56) ? (56 - index) : (120 - index);
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md5Update (PADDING, padLen);
195![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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///* Append length (before padding) */
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md5Update(bits, 8);
198![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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///* Store state in digest */
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Encode (digest, state, 16);
201![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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}
203![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
204![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* md5Memcpy是一个内部使用的byte数组的块拷贝函数,从input的inpos开始把len长度的
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字节拷贝到output的outpos位置开始
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*/
207![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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private void md5Memcpy (byte[] output, byte[] input,
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int outpos, int inpos, int len)
210![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
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int i;
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for (i = 0; i < len; i++)
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output[outpos + i] = input[inpos + i];
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}
216![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
217![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//*
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md5Transform是MD5核心变换程序,有md5Update调用,block是分块的原始字节
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*/
220![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private void md5Transform (byte block[])
{
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long a = state[0], b = state[1], c = state[2], d = state[3];
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long[] x = new long[16];
223![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
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Decode (x, block, 64);
225![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
226![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* Round 1 */
227![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = FF (a, b, c, d, x[0], S11, 0xd76aa478L); /**//* 1 */
228![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = FF (d, a, b, c, x[1], S12, 0xe8c7b756L); /**//* 2 */
229![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = FF (c, d, a, b, x[2], S13, 0x242070dbL); /**//* 3 */
230![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = FF (b, c, d, a, x[3], S14, 0xc1bdceeeL); /**//* 4 */
231![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = FF (a, b, c, d, x[4], S11, 0xf57c0fafL); /**//* 5 */
232![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = FF (d, a, b, c, x[5], S12, 0x4787c62aL); /**//* 6 */
233![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = FF (c, d, a, b, x[6], S13, 0xa8304613L); /**//* 7 */
234![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = FF (b, c, d, a, x[7], S14, 0xfd469501L); /**//* 8 */
235![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = FF (a, b, c, d, x[8], S11, 0x698098d8L); /**//* 9 */
236![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = FF (d, a, b, c, x[9], S12, 0x8b44f7afL); /**//* 10 */
237![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = FF (c, d, a, b, x[10], S13, 0xffff5bb1L); /**//* 11 */
238![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = FF (b, c, d, a, x[11], S14, 0x895cd7beL); /**//* 12 */
239![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = FF (a, b, c, d, x[12], S11, 0x6b901122L); /**//* 13 */
240![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = FF (d, a, b, c, x[13], S12, 0xfd987193L); /**//* 14 */
241![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = FF (c, d, a, b, x[14], S13, 0xa679438eL); /**//* 15 */
242![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = FF (b, c, d, a, x[15], S14, 0x49b40821L); /**//* 16 */
243![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
244![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* Round 2 */
245![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = GG (a, b, c, d, x[1], S21, 0xf61e2562L); /**//* 17 */
246![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = GG (d, a, b, c, x[6], S22, 0xc040b340L); /**//* 18 */
247![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = GG (c, d, a, b, x[11], S23, 0x265e5a51L); /**//* 19 */
248![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = GG (b, c, d, a, x[0], S24, 0xe9b6c7aaL); /**//* 20 */
249![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = GG (a, b, c, d, x[5], S21, 0xd62f105dL); /**//* 21 */
250![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = GG (d, a, b, c, x[10], S22, 0x2441453L); /**//* 22 */
251![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = GG (c, d, a, b, x[15], S23, 0xd8a1e681L); /**//* 23 */
252![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = GG (b, c, d, a, x[4], S24, 0xe7d3fbc8L); /**//* 24 */
253![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = GG (a, b, c, d, x[9], S21, 0x21e1cde6L); /**//* 25 */
254![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = GG (d, a, b, c, x[14], S22, 0xc33707d6L); /**//* 26 */
255![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = GG (c, d, a, b, x[3], S23, 0xf4d50d87L); /**//* 27 */
256![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = GG (b, c, d, a, x[8], S24, 0x455a14edL); /**//* 28 */
257![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = GG (a, b, c, d, x[13], S21, 0xa9e3e905L); /**//* 29 */
258![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = GG (d, a, b, c, x[2], S22, 0xfcefa3f8L); /**//* 30 */
259![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = GG (c, d, a, b, x[7], S23, 0x676f02d9L); /**//* 31 */
260![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = GG (b, c, d, a, x[12], S24, 0x8d2a4c8aL); /**//* 32 */
261![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
262![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* Round 3 */
263![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = HH (a, b, c, d, x[5], S31, 0xfffa3942L); /**//* 33 */
264![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = HH (d, a, b, c, x[8], S32, 0x8771f681L); /**//* 34 */
265![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = HH (c, d, a, b, x[11], S33, 0x6d9d6122L); /**//* 35 */
266![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = HH (b, c, d, a, x[14], S34, 0xfde5380cL); /**//* 36 */
267![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = HH (a, b, c, d, x[1], S31, 0xa4beea44L); /**//* 37 */
268![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = HH (d, a, b, c, x[4], S32, 0x4bdecfa9L); /**//* 38 */
269![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = HH (c, d, a, b, x[7], S33, 0xf6bb4b60L); /**//* 39 */
270![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = HH (b, c, d, a, x[10], S34, 0xbebfbc70L); /**//* 40 */
271![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = HH (a, b, c, d, x[13], S31, 0x289b7ec6L); /**//* 41 */
272![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = HH (d, a, b, c, x[0], S32, 0xeaa127faL); /**//* 42 */
273![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = HH (c, d, a, b, x[3], S33, 0xd4ef3085L); /**//* 43 */
274![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = HH (b, c, d, a, x[6], S34, 0x4881d05L); /**//* 44 */
275![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = HH (a, b, c, d, x[9], S31, 0xd9d4d039L); /**//* 45 */
276![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = HH (d, a, b, c, x[12], S32, 0xe6db99e5L); /**//* 46 */
277![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = HH (c, d, a, b, x[15], S33, 0x1fa27cf8L); /**//* 47 */
278![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = HH (b, c, d, a, x[2], S34, 0xc4ac5665L); /**//* 48 */
279![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
280![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//* Round 4 */
281![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = II (a, b, c, d, x[0], S41, 0xf4292244L); /**//* 49 */
282![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = II (d, a, b, c, x[7], S42, 0x432aff97L); /**//* 50 */
283![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = II (c, d, a, b, x[14], S43, 0xab9423a7L); /**//* 51 */
284![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = II (b, c, d, a, x[5], S44, 0xfc93a039L); /**//* 52 */
285![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = II (a, b, c, d, x[12], S41, 0x655b59c3L); /**//* 53 */
286![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = II (d, a, b, c, x[3], S42, 0x8f0ccc92L); /**//* 54 */
287![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = II (c, d, a, b, x[10], S43, 0xffeff47dL); /**//* 55 */
288![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = II (b, c, d, a, x[1], S44, 0x85845dd1L); /**//* 56 */
289![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = II (a, b, c, d, x[8], S41, 0x6fa87e4fL); /**//* 57 */
290![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = II (d, a, b, c, x[15], S42, 0xfe2ce6e0L); /**//* 58 */
291![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = II (c, d, a, b, x[6], S43, 0xa3014314L); /**//* 59 */
292![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = II (b, c, d, a, x[13], S44, 0x4e0811a1L); /**//* 60 */
293![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
a = II (a, b, c, d, x[4], S41, 0xf7537e82L); /**//* 61 */
294![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
d = II (d, a, b, c, x[11], S42, 0xbd3af235L); /**//* 62 */
295![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
c = II (c, d, a, b, x[2], S43, 0x2ad7d2bbL); /**//* 63 */
296![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
b = II (b, c, d, a, x[9], S44, 0xeb86d391L); /**//* 64 */
297![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
298
state[0] += a;
299
state[1] += b;
300
state[2] += c;
301
state[3] += d;
302![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
303
}
304![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
305![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//*Encode把long数组按顺序拆成byte数组,因为java的long类型是64bit的,
306
只拆低32bit,以适应原始C实现的用途
307
*/
308![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private void Encode (byte[] output, long[] input, int len)
{
309
int i, j;
310![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
311![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
for (i = 0, j = 0; j < len; i++, j += 4)
{
312
output[j] = (byte)(input[i] & 0xffL);
313
output[j + 1] = (byte)((input[i] >>> 8) & 0xffL);
314
output[j + 2] = (byte)((input[i] >>> 16) & 0xffL);
315
output[j + 3] = (byte)((input[i] >>> 24) & 0xffL);
316
}
317
}
318![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
319![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//*Decode把byte数组按顺序合成成long数组,因为java的long类型是64bit的,
320
只合成低32bit,高32bit清零,以适应原始C实现的用途
321
*/
322![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
private void Decode (long[] output, byte[] input, int len)
{
323
int i, j;
324![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
325![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
326
for (i = 0, j = 0; j < len; i++, j += 4)
327
output[i] = b2iu(input[j]) |
328
(b2iu(input[j + 1]) << 8) |
329
(b2iu(input[j + 2]) << 16) |
330
(b2iu(input[j + 3]) << 24);
331![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
332
return;
333
}
334![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
335![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//*
336
b2iu是我写的一个把byte按照不考虑正负号的原则的"升位"程序,因为java没有unsigned运算
337
*/
338![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
public static long b2iu(byte b)
{
339
return b < 0 ? b & 0x7F + 128 : b;
340
}
341![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
342![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//*byteHEX(),用来把一个byte类型的数转换成十六进制的ASCII表示,
343
因为java中的byte的toString无法实现这一点,我们又没有C语言中的
344
sprintf(outbuf,"%02X",ib)
345
*/
346![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
public static String byteHEX(byte ib)
{
347![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
char[] Digit =
{ '0','1','2','3','4','5','6','7','8','9',
348
'A','B','C','D','E','F' };
349
char [] ob = new char[2];
350
ob[0] = Digit[(ib >>> 4) & 0X0F];
351
ob[1] = Digit[ib & 0X0F];
352
String s = new String(ob);
353
return s;
354
}
355
public static void main(String args[])
356![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
357
MD5 md5=new MD5();
358
System.out.println(md5.getMD5ofStr("haha"));
359
}
360![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
361
}
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posted on
2009-04-14 10:57
将军
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