???????????MD5???????????????????????

import java.lang.reflect.*;
/**
* **********************************************
* md5 ???????RSA Data Security?? Inc.??????IETF
* ??RFC1321?е?MD5 message-digest ????
* ***********************************************
*/
public class MD5 {
/* ??????ЩS11-S44??????????4*4???????????C?????????#define ?????
??????????????static final????????????????????????????????
Instance?乲??*/
static final int S11 = 7;
static final int S12 = 12;
static final int S13 = 17;
static final int S14 = 22;
static final int S21 = 5;
static final int S22 = 9;
static final int S23 = 14;
static final int S24 = 20;
static final int S31 = 4;
static final int S32 = 11;
static final int S33 = 16;
static final int S34 = 23;
static final int S41 = 6;
static final int S42 = 10;
static final int S43 = 15;
static final int S44 = 21;
static final byte[] PADDING = { -128?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0??
0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0??
0 };
/* ??????????????MD5??????????????3?????????????????C?????
?????嵽MD5_CTX????
*/
private long[] state = new long[4]; // state (ABCD)
private long[] count = new long[2]; // number of bits?? modulo 2^64 (lsb first)
private byte[] buffer = new byte[64]; // input buffer
/* digestHexStr??MD5????????????????????μ???????
16????ASCII???.
*/
public String digestHexStr;
/* digest????????μ???????2???????????????128bit??MD5?.
*/
private byte[] digest = new byte[16];
/*
getMD5ofStr????MD5???????????????????????????????MD5?任???????
???????任??????????????????????digestHexStr?????
*/
public String getMD5ofStr(String inbuf) {
md5Init();
md5Update(inbuf.getBytes()?? inbuf.length());
md5Final();
digestHexStr = "";
for (int i = 0; i < 16; i++) {
digestHexStr += byteHEX(digest[i]);
}
return digestHexStr;
}
// ????MD5????????????????JavaBean????????public???????в??????????
public MD5() {
md5Init();
return;
}
/* md5Init???????????????????????????????????????? */
private void md5Init() {
count[0] = 0L;
count[1] = 0L;
///* Load magic initialization constants.
state[0] = 0x67452301L;
state[1] = 0xefcdab89L;
state[2] = 0x98badcfeL;
state[3] = 0x10325476L;
return;
}
/* F?? G?? H ??I ??4????????MD5????????????MD5??C????У???????????
????λ???????????Ч????????????????????java?У??????????
??????private??????????????????C?е?? */
private long F(long x?? long y?? long z) {
return (x & y) | ((~x) & z);
}
private long G(long x?? long y?? long z) {
return (x & z) | (y & (~z));
}
private long H(long x?? long y?? long z) {
return x ^ y ^ z;
}
private long I(long x?? long y?? long z) {
return y ^ (x | (~z));
}
/*
FF??GG??HH??II??????F??G??H??I???н?????任
FF?? GG?? HH?? and II transformations for rounds 1?? 2?? 3?? and 4.
Rotation is separate from addition to prevent recomputation.
*/
private long FF(long a?? long b?? long c?? long d?? long x?? long s?? long ac) {
a += F(b?? c?? d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
private long GG(long a?? long b?? long c?? long d?? long x?? long s?? long ac) {
a += G(b?? c?? d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
private long HH(long a?? long b?? long c?? long d?? long x?? long s?? long ac) {
a += H(b?? c?? d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
private long II(long a?? long b?? long c?? long d?? long x?? long s?? long ac) {
a += I(b?? c?? d) + x + ac;
a = ((int) a << s) | ((int) a >>> (32 - s));
a += b;
return a;
}
/*
md5Update??MD5????????????inbuf????任????????inputlen?????????
??????getMD5ofStr??????????????????md5init????????????private??
*/
private void md5Update(byte[] inbuf?? int inputLen) {
int i?? index?? partLen;
byte[] block = new byte[64];
index = (int) (count[0] >>> 3) & 0x3F;
// /* Update number of bits */
if ((count[0] += (inputLen << 3)) < (inputLen << 3))
count[1]++;
count[1] += (inputLen >>> 29);
partLen = 64 - index;
// Transform as many times as possible.
if (inputLen >= partLen) {
md5Memcpy(buffer?? inbuf?? index?? 0?? partLen);
md5Transform(buffer);
for (i = partLen; i + 63 < inputLen; i += 64) {
md5Memcpy(block?? inbuf?? 0?? i?? 64);
md5Transform(block);
}
index = 0;
} else
i = 0;
///* Buffer remaining input */
md5Memcpy(buffer?? inbuf?? index?? i?? inputLen - i);
}
/*
md5Final???????д??????
*/
private void md5Final() {
byte[] bits = new byte[8];
int index?? padLen;
///* Save number of bits */
Encode(bits?? count?? 8);
///* Pad out to 56 mod 64.
index = (int) (count[0] >>> 3) & 0x3f;
padLen = (index < 56) ? (56 - index) : (120 - index);
md5Update(PADDING?? padLen);
///* Append length (before padding) */
md5Update(bits?? 8);
///* Store state in digest */
Encode(digest?? state?? 16);
}
/* md5Memcpy????????????byte????????????????input??inpos?????len?????
????????output??outposλ????
*/
private void md5Memcpy(byte[] output?? byte[] input?? int outpos?? int inpos?? int len) {
int i;
for (i = 0; i < len; i++)
output[outpos + i] = input[inpos + i];
}
/*
md5Transform??MD5????任??????md5Update?????block??????????
*/
private void md5Transform(byte block[]) {
long a = state[0]?? b = state[1]?? c = state[2]?? d = state[3];
long[] x = new long[16];
Decode(x?? block?? 64);
/* Round 1 */
a = FF(a?? b?? c?? d?? x[0]?? S11?? 0xd76aa478L); /* 1 */
d = FF(d?? a?? b?? c?? x[1]?? S12?? 0xe8c7b756L); /* 2 */
c = FF(c?? d?? a?? b?? x[2]?? S13?? 0x242070dbL); /* 3 */
b = FF(b?? c?? d?? a?? x[3]?? S14?? 0xc1bdceeeL); /* 4 */
a = FF(a?? b?? c?? d?? x[4]?? S11?? 0xf57c0fafL); /* 5 */
d = FF(d?? a?? b?? c?? x[5]?? S12?? 0x4787c62aL); /* 6 */
c = FF(c?? d?? a?? b?? x[6]?? S13?? 0xa8304613L); /* 7 */
b = FF(b?? c?? d?? a?? x[7]?? S14?? 0xfd469501L); /* 8 */
a = FF(a?? b?? c?? d?? x[8]?? S11?? 0x698098d8L); /* 9 */
d = FF(d?? a?? b?? c?? x[9]?? S12?? 0x8b44f7afL); /* 10 */
c = FF(c?? d?? a?? b?? x[10]?? S13?? 0xffff5bb1L); /* 11 */
b = FF(b?? c?? d?? a?? x[11]?? S14?? 0x895cd7beL); /* 12 */
a = FF(a?? b?? c?? d?? x[12]?? S11?? 0x6b901122L); /* 13 */
d = FF(d?? a?? b?? c?? x[13]?? S12?? 0xfd987193L); /* 14 */
c = FF(c?? d?? a?? b?? x[14]?? S13?? 0xa679438eL); /* 15 */
b = FF(b?? c?? d?? a?? x[15]?? S14?? 0x49b40821L); /* 16 */
/* Round 2 */
a = GG(a?? b?? c?? d?? x[1]?? S21?? 0xf61e2562L); /* 17 */
d = GG(d?? a?? b?? c?? x[6]?? S22?? 0xc040b340L); /* 18 */
c = GG(c?? d?? a?? b?? x[11]?? S23?? 0x265e5a51L); /* 19 */
b = GG(b?? c?? d?? a?? x[0]?? S24?? 0xe9b6c7aaL); /* 20 */
a = GG(a?? b?? c?? d?? x[5]?? S21?? 0xd62f105dL); /* 21 */
d = GG(d?? a?? b?? c?? x[10]?? S22?? 0x2441453L); /* 22 */
c = GG(c?? d?? a?? b?? x[15]?? S23?? 0xd8a1e681L); /* 23 */
b = GG(b?? c?? d?? a?? x[4]?? S24?? 0xe7d3fbc8L); /* 24 */
a = GG(a?? b?? c?? d?? x[9]?? S21?? 0x21e1cde6L); /* 25 */
d = GG(d?? a?? b?? c?? x[14]?? S22?? 0xc33707d6L); /* 26 */
c = GG(c?? d?? a?? b?? x[3]?? S23?? 0xf4d50d87L); /* 27 */
b = GG(b?? c?? d?? a?? x[8]?? S24?? 0x455a14edL); /* 28 */
a = GG(a?? b?? c?? d?? x[13]?? S21?? 0xa9e3e905L); /* 29 */
d = GG(d?? a?? b?? c?? x[2]?? S22?? 0xfcefa3f8L); /* 30 */
c = GG(c?? d?? a?? b?? x[7]?? S23?? 0x676f02d9L); /* 31 */
b = GG(b?? c?? d?? a?? x[12]?? S24?? 0x8d2a4c8aL); /* 32 */
/* Round 3 */
a = HH(a?? b?? c?? d?? x[5]?? S31?? 0xfffa3942L); /* 33 */
d = HH(d?? a?? b?? c?? x[8]?? S32?? 0x8771f681L); /* 34 */
c = HH(c?? d?? a?? b?? x[11]?? S33?? 0x6d9d6122L); /* 35 */
b = HH(b?? c?? d?? a?? x[14]?? S34?? 0xfde5380cL); /* 36 */
a = HH(a?? b?? c?? d?? x[1]?? S31?? 0xa4beea44L); /* 37 */
d = HH(d?? a?? b?? c?? x[4]?? S32?? 0x4bdecfa9L); /* 38 */
c = HH(c?? d?? a?? b?? x[7]?? S33?? 0xf6bb4b60L); /* 39 */
b = HH(b?? c?? d?? a?? x[10]?? S34?? 0xbebfbc70L); /* 40 */
a = HH(a?? b?? c?? d?? x[13]?? S31?? 0x289b7ec6L); /* 41 */
d = HH(d?? a?? b?? c?? x[0]?? S32?? 0xeaa127faL); /* 42 */
c = HH(c?? d?? a?? b?? x[3]?? S33?? 0xd4ef3085L); /* 43 */
b = HH(b?? c?? d?? a?? x[6]?? S34?? 0x4881d05L); /* 44 */
a = HH(a?? b?? c?? d?? x[9]?? S31?? 0xd9d4d039L); /* 45 */
d = HH(d?? a?? b?? c?? x[12]?? S32?? 0xe6db99e5L); /* 46 */
c = HH(c?? d?? a?? b?? x[15]?? S33?? 0x1fa27cf8L); /* 47 */
b = HH(b?? c?? d?? a?? x[2]?? S34?? 0xc4ac5665L); /* 48 */
/* Round 4 */
a = II(a?? b?? c?? d?? x[0]?? S41?? 0xf4292244L); /* 49 */
d = II(d?? a?? b?? c?? x[7]?? S42?? 0x432aff97L); /* 50 */
c = II(c?? d?? a?? b?? x[14]?? S43?? 0xab9423a7L); /* 51 */
b = II(b?? c?? d?? a?? x[5]?? S44?? 0xfc93a039L); /* 52 */
a = II(a?? b?? c?? d?? x[12]?? S41?? 0x655b59c3L); /* 53 */
d = II(d?? a?? b?? c?? x[3]?? S42?? 0x8f0ccc92L); /* 54 */
c = II(c?? d?? a?? b?? x[10]?? S43?? 0xffeff47dL); /* 55 */
b = II(b?? c?? d?? a?? x[1]?? S44?? 0x85845dd1L); /* 56 */
a = II(a?? b?? c?? d?? x[8]?? S41?? 0x6fa87e4fL); /* 57 */
d = II(d?? a?? b?? c?? x[15]?? S42?? 0xfe2ce6e0L); /* 58 */
c = II(c?? d?? a?? b?? x[6]?? S43?? 0xa3014314L); /* 59 */
b = II(b?? c?? d?? a?? x[13]?? S44?? 0x4e0811a1L); /* 60 */
a = II(a?? b?? c?? d?? x[4]?? S41?? 0xf7537e82L); /* 61 */
d = II(d?? a?? b?? c?? x[11]?? S42?? 0xbd3af235L); /* 62 */
c = II(c?? d?? a?? b?? x[2]?? S43?? 0x2ad7d2bbL); /* 63 */
b = II(b?? c?? d?? a?? x[9]?? S44?? 0xeb86d391L); /* 64 */
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
}
/*Encode??long???鰴?????byte???飬???java??long??????64bit???
????32bit?????????C???????
*/
private void Encode(byte[] output?? long[] input?? int len) {
int i?? j;
for (i = 0?? j = 0; j < len; i++?? j += 4) {
output[j] = (byte) (input[i] & 0xffL);
output[j + 1] = (byte) ((input[i] >>> 8) & 0xffL);
output[j + 2] = (byte) ((input[i] >>> 16) & 0xffL);
output[j + 3] = (byte) ((input[i] >>> 24) & 0xffL);
}
}
/*Decode??byte???鰴??????long???飬???java??long??????64bit???
?????32bit????32bit???????????C???????
*/
private void Decode(long[] output?? byte[] input?? int len) {
int i?? j;
for (i = 0?? j = 0; j < len; i++?? j += 4)
output[i] = b2iu(input[j]) | (b2iu(input[j + 1]) << 8) | (b2iu(input[j + 2]) << 16)
| (b2iu(input[j + 3]) << 24);
return;
}
/*
b2iu????д???????byte???????????????????????λ?????????java???unsigned????
*/
public static long b2iu(byte b) {
return b < 0 ? b & 0x7F + 128 : b;
}
/*byteHEX()???????????byte????????????????????ASCII?????
???java?е?byte??toString????????????????????C?????е?
sprintf(outbuf??"%02X"??ib)
*/
public static String byteHEX(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;
}
public static void main(String args[]) {
MD5 m = new MD5();
if (Array.getLength(args) == 0) { //?????в???????б????Test Suite
System.out.println("MD5 Test suite:");
System.out.println("MD5(""):" + m.getMD5ofStr(""));
System.out.println("MD5("a"):" + m.getMD5ofStr("a"));
System.out.println("MD5("abc"):" + m.getMD5ofStr("abc"));
System.out.println("MD5("11"):" + m.getMD5ofStr("11"));
System.out.println("MD5("123"):" + m.getMD5ofStr("123"));
System.out.println("MD5("message digest"):" + m.getMD5ofStr("message digest"));
System.out.println("MD5("abcdefghijklmnopqrstuvwxyz"):" + m.getMD5ofStr("abcdefghijklmnopqrstuvwxyz"));
System.out.println("MD5("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"):"
+ m.getMD5ofStr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"));
} else
System.out.println("MD5(" + args[0] + ")=" + m.getMD5ofStr(args[0]));
}
}