MD5

package com.gootrip.util;

// Md5.java

// $Id: Md5.java,v 1.4 1999/12/06 13:13:58 ylafon Exp $

// (c) COPYRIGHT MIT and INRIA, 1996.

// Please first read the full copyright statement in file COPYRIGHT.html

//

//

// Add model hmac_Md5 ( String text , String key ) ;

//package md5java ;

import java.io.* ;

public class Md5 {

private static final int BUFFER_SIZE = 1024 ;

private static final int S11 = 7 ;

private static final int S12 = 12 ;

private static final int S13 = 17 ;

private static final int S14 = 22 ;

private static final int S21 = 5 ;

private static final int S22 = 9 ;

private static final int S23 = 14 ;

private static final int S24 = 20 ;

private static final int S31 = 4 ;

private static final int S32 = 11 ;

private static final int S33 = 16 ;

private static final int S34 = 23 ;

private static final int S41 = 6 ;

private static final int S42 = 10 ;

private static final int S43 = 15 ;

private static final int S44 = 21 ;

private static byte padding[] = {

(byte) 0x80, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0,

(byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0,

(byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0,

(byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0,

(byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0,

(byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0,

(byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0,

(byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0,

(byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0,

(byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0, (byte) 0,

(byte) 0, (byte) 0, (byte) 0, (byte) 0

} ;

private InputStream in = null ;

private boolean stringp = false ;

private int state[] = null ;

private long count = 0 ;

private byte buffer[] = null ;

private byte digest[] = null ;

public static String stringify (byte buf[]) {

StringBuffer sb = new StringBuffer(2*buf.length) ;

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

int h = (buf[i] & 0xf0) >> 4 ;

int l = (buf[i] & 0x0f) ;

sb.append (new Character((char)((h>9) ? 'a'+h-10 : '0'+h))) ;

sb.append (new Character((char)((l>9) ? 'a'+l-10 : '0'+l))) ;

}

return sb.toString() ;

}

private final int F(int x, int y, int z) {

return ((x & y) | ((~x) & z)) ;

}

private final int G(int x, int y, int z) {

return ((x & z) | (y & (~z))) ;

}

private final int H(int x, int y, int z) {

return (x ^ y ^ z) ;

}

private final int I(int x, int y, int z) {

return (y ^ (x | (~z))) ;

}

private final int rotate_left(int x, int n) {

return ((x << n) | (x >>> (32-n))) ;

}

private final int FF(int a,int b,int c,int d,int x,int s,int ac) {

a += (F(b, c, d) + x + ac) ;

a = rotate_left(a, s) ;

a += b ;

return a ;

}

private final int GG(int a,int b,int c,int d,int x,int s,int ac) {

a += (G(b, c, d) + x + ac) ;

a = rotate_left(a, s) ;

a += b ;

return a ;

}

private final int HH(int a,int b,int c,int d,int x,int s,int ac) {

a += (H(b, c, d) + x + ac) ;

a = rotate_left(a, s) ;

a += b ;

return a ;

}

private final int II(int a,int b,int c,int d,int x,int s,int ac) {

a += (I(b, c, d) + x + ac) ;

a = rotate_left(a, s) ;

a += b ;

return a;

}

private final void decode (int output[], byte input[], int off, int len) {

int i = 0 ;

int j = 0 ;

for ( ; j < len; i++, j += 4) {

output[i] = (((int) (input[off+j]&0xff))

| (((int) (input[off+j+1] & 0xff)) << 8)

| (((int) (input[off+j+2] & 0xff)) << 16)

| (((int) (input[off+j+3] & 0xff)) << 24)) ;

}

}

private final void transform (byte block[], int offset) {

int a = state[0] ;

int b = state[1] ;

int c = state[2] ;

int d = state[3] ;

int x[] = new int[16] ;

decode (x, block, offset, 64);

/* Round 1 */

a = FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */

d = FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */

c = FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */

b = FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */

a = FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */

d = FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */

c = FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */

b = FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */

a = FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */

d = FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */

c = FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */

b = FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */

a = FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */

d = FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */

c = FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */

b = FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */

/* Round 2 */

a = GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */

d = GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */

c = GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */

b = GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */

a = GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */

d = GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */

c = GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */

b = GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */

a = GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */

d = GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */

c = GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */

b = GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */

a = GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */

d = GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */

c = GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */

b = GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */

/* Round 3 */

a = HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */

d = HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */

c = HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */

b = HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */

a = HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */

d = HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */

c = HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */

b = HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */

a = HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */

d = HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */

c = HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */

b = HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */

a = HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */

d = HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */

c = HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */

b = HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */

/* Round 4 */

a = II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */

d = II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */

c = II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */

b = II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */

a = II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */

d = II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */

c = II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */

b = II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */

a = II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */

d = II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */

c = II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */

b = II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */

a = II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */

d = II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */

c = II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */

b = II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */

state[0] += a;

state[1] += b;

state[2] += c;

state[3] += d;

}

private final void update (byte input[], int len) {

int index = ((int) (count >> 3)) & 0x3f ;

count += (len << 3) ;

int partLen = 64 - index ;

int i = 0 ;

if ( len >= partLen ) {

System.arraycopy (input, 0, buffer, index, partLen) ;

transform (buffer, 0) ;

for (i = partLen ; i + 63 < len ; i+= 64)

transform (input, i) ;

index = 0 ;

} else {

i = 0 ;

}

System.arraycopy (input, i, buffer, index, len - i) ;

}

private byte[] end () {

byte bits[] = new byte[8] ;

for (int i = 0 ; i < 8 ; i++)

bits[i] = (byte) ((count>>>(i*8)) & 0xff) ;

int index = ((int) (count >> 3)) & 0x3f ;

int padlen = (index < 56) ? (56 - index) : (120 - index) ;

update (padding, padlen) ;

update (bits, 8) ;

return encode(state, 16) ;

}

// Encode the content.state array into 16 bytes array

private byte[] encode (int input[], int len) {

byte output[] = new byte[len] ;

int i = 0 ;

int j = 0 ;

for ( ; j < len ; i++, j+= 4) {

output[j] = (byte) ((input[i] ) & 0xff) ;

output[j+1] = (byte) ((input[i] >> 8 ) & 0xff) ;

output[j+2] = (byte) ((input[i] >> 16) & 0xff) ;

output[j+3] = (byte) ((input[i] >> 24) & 0xff) ;

}

return output ;

}

/**

* Get the digest for our input stream.

* This method constructs the input stream digest, and return it, as a

* a String, following the MD5 (rfc1321) algorithm,

* @return An instance of String, giving the message digest.

* @exception IOException Thrown if the digestifier was unable to read the

* input stream.

*/

public byte[] getDigest ()

throws IOException

{

byte buffer[] = new byte[BUFFER_SIZE] ;

int got = -1 ;

if ( digest != null )

return digest ;

while ((got = in.read(buffer)) > 0 )

update (buffer, got) ;

this.digest = end () ;

return digest ;

}

/**

* Get the digest, for this string digestifier.

* This method doesn't throw any IOException, since it knows that the

* underlying stream ws built from a String.

*/

public byte[] processString () {

if ( ! stringp )

throw new RuntimeException (this.getClass().getName()

+ "[processString]"

+ " not a string.") ;

try {

return getDigest() ;

} catch (IOException ex) {

}

throw new RuntimeException (this.getClass().getName()

+ "[processString]"

+ ": implementation error.") ;

}

/**

* Get the digest, as a proper string.

*/

public String getStringDigest() {

if ( digest == null )

throw new RuntimeException (this.getClass().getName()

+ "[getStringDigest]"

+ ": called before processing.") ;

return stringify (digest) ;

}

/**

* Construct a digestifier for the given string.

* @param input The string to be digestified.

* @param encoding the encoding name used (such as UTF8)

*/

public Md5 (String input, String enc) {

byte bytes [] = null;

try {

bytes = input.getBytes (enc);

} catch(UnsupportedEncodingException e){

throw new RuntimeException("no "+enc+" encoding!!!");

}

this.stringp = true ;

this.in = new ByteArrayInputStream (bytes) ;

this.state = new int[4] ;

this.buffer = new byte[64] ;

this.count = 0 ;

state[0] = 0x67452301;

state[1] = 0xefcdab89;

state[2] = 0x98badcfe;

state[3] = 0x10325476;

}

/**

* Construct a digestifier for the given string.

* @param input The string to be digestified.

*/

public Md5 (String input) {

this(input, "UTF8");

}

/**

* Construct a digestifier for the given input stream.

* @param in The input stream to be digestified.

*/

public Md5 (InputStream in) {

this.stringp = false ;

this.in = in ;

this.state = new int[4] ;

this.buffer = new byte[64] ;

this.count = 0 ;

state[0] = 0x67452301;

state[1] = 0xefcdab89;

state[2] = 0x98badcfe;

state[3] = 0x10325476;

}

public void hmac_Md5 ( String text , String key )

throws IOException {

//byte disgest[] = new byte[16] ;

//byte output[] = new byte[32] ;

//output[33] = ( byte ) '\0' ;

byte k_ipad[] = new byte[64] ;

byte k_opad[] = new byte[64] ;

//byte tk[] = new byte[16] ;

byte key1 [] ;

int i ;

int text_len = text.getBytes().length ;

int key_len = key.getBytes().length ;

key1 = key.getBytes() ;

if ( key_len > 64 ) {

key1 = new Md5( key ).getDigest() ;

key_len = 16 ;

}

for ( i = 0 ; i < 64 ; i++ )

k_ipad[i] = ( byte ) 0 ;

for ( i = 0 ; i < 64 ; i++ )

k_opad[i] = ( byte ) 0 ;

for ( i = 0 ; i < key_len ; i++ ) {

k_ipad[i] = ( byte ) key1[i] ;

k_opad[i] = ( byte ) key1[i] ;

}

for ( i = 0 ; i < 64 ; i++ ) {

k_ipad[i] ^= 0x36 ;

k_opad[i] ^= 0x5c ;

}

Md5 md5 = new Md5( "" ) ;

md5.update( k_ipad , 64 ) ;

md5.update( text.getBytes() , text_len ) ;

digest = md5.getDigest() ;

Md5 md51 = new Md5( "" ) ;

md51.update( k_opad , 64 ) ;

md51.update( digest , 16 ) ;

digest = md51.getDigest() ;

}

}