382 lines
10 KiB
JavaScript
382 lines
10 KiB
JavaScript
/*
|
|
* md5.jvs 1.0b 27/06/96
|
|
*
|
|
* Javascript implementation of the RSA Data Security, Inc. MD5
|
|
* Message-Digest Algorithm.
|
|
*
|
|
* Copyright (c) 1996 Henri Torgemane. All Rights Reserved.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software
|
|
* and its documentation for any purposes and without
|
|
* fee is hereby granted provided that this copyright notice
|
|
* appears in all copies.
|
|
*
|
|
* Of course, this soft is provided "as is" without express or implied
|
|
* warranty of any kind.
|
|
*/
|
|
|
|
|
|
|
|
function array(n) {
|
|
for(i=0;i<n;i++) this[i]=0;
|
|
this.length=n;
|
|
}
|
|
|
|
/* Some basic logical functions had to be rewritten because of a bug in
|
|
* Javascript.. Just try to compute 0xffffffff >> 4 with it..
|
|
* Of course, these functions are slower than the original would be, but
|
|
* at least, they work!
|
|
*/
|
|
|
|
function integer(n) { return n%(0x7fffffff+0x7fffffff+2); }
|
|
|
|
function shr(a,b) {
|
|
a=integer(a);
|
|
b=integer(b);
|
|
if (a-(0x7fffffff+1)>=0) {
|
|
a=a%(0x7fffffff+1);
|
|
a=a >> b;
|
|
a+=0x40000000>>(b-1);
|
|
} else
|
|
a=a >> b;
|
|
return a;
|
|
}
|
|
|
|
function shl1(a) {
|
|
a=a%(0x7fffffff+1);
|
|
if (a&0x40000000==0x40000000)
|
|
{
|
|
a-=0x40000000;
|
|
a*=2;
|
|
a+=(0x7fffffff+1);
|
|
} else
|
|
a*=2;
|
|
return a;
|
|
}
|
|
|
|
function shl(a,b) {
|
|
a=integer(a);
|
|
b=integer(b);
|
|
for (var i=0;i<b;i++) a=shl1(a);
|
|
return a;
|
|
}
|
|
|
|
function and(a,b) {
|
|
a=integer(a);
|
|
b=integer(b);
|
|
var t1=(a-0x7fffffff-1);
|
|
var t2=(b-0x7fffffff-1);
|
|
if (t1>=0)
|
|
if (t2>=0)
|
|
return ((t1&t2)+(0x7fffffff+1));
|
|
else
|
|
return (t1&b);
|
|
else
|
|
if (t2>=0)
|
|
return (a&t2);
|
|
else
|
|
return (a&b);
|
|
}
|
|
|
|
function or(a,b) {
|
|
a=integer(a);
|
|
b=integer(b);
|
|
var t1=(a-(0x7fffffff+1));
|
|
var t2=(b-(0x7fffffff+1));
|
|
if (t1>=0)
|
|
if (t2>=0)
|
|
return ((t1|t2)+(0x7fffffff+1));
|
|
else
|
|
return ((t1|b)+(0x7fffffff+1));
|
|
else
|
|
if (t2>=0)
|
|
return ((a|t2)+(0x7fffffff+1));
|
|
else
|
|
return (a|b);
|
|
}
|
|
|
|
function xor(a,b) {
|
|
a=integer(a);
|
|
b=integer(b);
|
|
var t1=(a-(0x7fffffff+1));
|
|
var t2=(b-(0x7fffffff+1));
|
|
if (t1>=0)
|
|
if (t2>=0)
|
|
return (t1^t2);
|
|
else
|
|
return ((t1^b)+(0x7fffffff+1));
|
|
else
|
|
if (t2>=0)
|
|
return ((a^t2)+(0x7fffffff+1));
|
|
else
|
|
return (a^b);
|
|
}
|
|
|
|
function not(a) {
|
|
a=integer(a);
|
|
return (0x7fffffff+0x7fffffff+1-a);
|
|
}
|
|
|
|
/* Here begin the real algorithm */
|
|
|
|
var state = new array(4);
|
|
var count = new array(2);
|
|
count[0] = 0;
|
|
count[1] = 0;
|
|
var buffer = new array(64);
|
|
var transformBuffer = new array(16);
|
|
var digestBits = new array(16);
|
|
|
|
var S11 = 7;
|
|
var S12 = 12;
|
|
var S13 = 17;
|
|
var S14 = 22;
|
|
var S21 = 5;
|
|
var S22 = 9;
|
|
var S23 = 14;
|
|
var S24 = 20;
|
|
var S31 = 4;
|
|
var S32 = 11;
|
|
var S33 = 16;
|
|
var S34 = 23;
|
|
var S41 = 6;
|
|
var S42 = 10;
|
|
var S43 = 15;
|
|
var S44 = 21;
|
|
|
|
function F(x,y,z) {
|
|
return or(and(x,y),and(not(x),z));
|
|
}
|
|
|
|
function G(x,y,z) {
|
|
return or(and(x,z),and(y,not(z)));
|
|
}
|
|
|
|
function H(x,y,z) {
|
|
return xor(xor(x,y),z);
|
|
}
|
|
|
|
function I(x,y,z) {
|
|
return xor(y ,or(x , not(z)));
|
|
}
|
|
|
|
function rotateLeft(a,n) {
|
|
return or(shl(a, n),(shr(a,(32 - n))));
|
|
}
|
|
|
|
function FF(a,b,c,d,x,s,ac) {
|
|
a = a+F(b, c, d) + x + ac;
|
|
a = rotateLeft(a, s);
|
|
a = a+b;
|
|
return a;
|
|
}
|
|
|
|
function GG(a,b,c,d,x,s,ac) {
|
|
a = a+G(b, c, d) +x + ac;
|
|
a = rotateLeft(a, s);
|
|
a = a+b;
|
|
return a;
|
|
}
|
|
|
|
function HH(a,b,c,d,x,s,ac) {
|
|
a = a+H(b, c, d) + x + ac;
|
|
a = rotateLeft(a, s);
|
|
a = a+b;
|
|
return a;
|
|
}
|
|
|
|
function II(a,b,c,d,x,s,ac) {
|
|
a = a+I(b, c, d) + x + ac;
|
|
a = rotateLeft(a, s);
|
|
a = a+b;
|
|
return a;
|
|
}
|
|
|
|
function transform(buf,offset) {
|
|
var a=0, b=0, c=0, d=0;
|
|
var x = transformBuffer;
|
|
|
|
a = state[0];
|
|
b = state[1];
|
|
c = state[2];
|
|
d = state[3];
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
x[i] = and(buf[i*4+offset],0xff);
|
|
for (j = 1; j < 4; j++) {
|
|
x[i]+=shl(and(buf[i*4+j+offset] ,0xff), j * 8);
|
|
}
|
|
}
|
|
|
|
/* Round 1 */
|
|
a = FF ( a, b, c, d, x[ 0], S11, 0x576aa479+0x7fffffff); /* 1 */
|
|
d = FF ( d, a, b, c, x[ 1], S12, 0x68c7b757+0x7fffffff); /* 2 */
|
|
c = FF ( c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
|
|
b = FF ( b, c, d, a, x[ 3], S14, 0x41bdceef+0x7fffffff); /* 4 */
|
|
a = FF ( a, b, c, d, x[ 4], S11, 0x757c0fb0+0x7fffffff); /* 5 */
|
|
d = FF ( d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
|
|
c = FF ( c, d, a, b, x[ 6], S13, 0x28304614+0x7fffffff); /* 7 */
|
|
b = FF ( b, c, d, a, x[ 7], S14, 0x7d469502+0x7fffffff); /* 8 */
|
|
a = FF ( a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
|
|
d = FF ( d, a, b, c, x[ 9], S12, 0x0b44f7b0+0x7fffffff); /* 10 */
|
|
c = FF ( c, d, a, b, x[10], S13, 0x7fff5bb2+0x7fffffff); /* 11 */
|
|
b = FF ( b, c, d, a, x[11], S14, 0x095cd7bf+0x7fffffff); /* 12 */
|
|
a = FF ( a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
|
|
d = FF ( d, a, b, c, x[13], S12, 0x7d987194+0x7fffffff); /* 14 */
|
|
c = FF ( c, d, a, b, x[14], S13, 0x2679438f+0x7fffffff); /* 15 */
|
|
b = FF ( b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
|
|
|
|
/* Round 2 */
|
|
a = GG ( a, b, c, d, x[ 1], S21, 0x761e2563+0x7fffffff); /* 17 */
|
|
d = GG ( d, a, b, c, x[ 6], S22, 0x4040b341+0x7fffffff); /* 18 */
|
|
c = GG ( c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
|
|
b = GG ( b, c, d, a, x[ 0], S24, 0x69b6c7ab+0x7fffffff); /* 20 */
|
|
a = GG ( a, b, c, d, x[ 5], S21, 0x562f105e+0x7fffffff); /* 21 */
|
|
d = GG ( d, a, b, c, x[10], S22, 0x02441453); /* 22 */
|
|
c = GG ( c, d, a, b, x[15], S23, 0x58a1e682+0x7fffffff); /* 23 */
|
|
b = GG ( b, c, d, a, x[ 4], S24, 0x67d3fbc9+0x7fffffff); /* 24 */
|
|
a = GG ( a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
|
|
d = GG ( d, a, b, c, x[14], S22, 0x433707d7+0x7fffffff); /* 26 */
|
|
c = GG ( c, d, a, b, x[ 3], S23, 0x74d50d88+0x7fffffff); /* 27 */
|
|
b = GG ( b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
|
|
a = GG ( a, b, c, d, x[13], S21, 0x29e3e906+0x7fffffff); /* 29 */
|
|
d = GG ( d, a, b, c, x[ 2], S22, 0x7cefa3f9+0x7fffffff); /* 30 */
|
|
c = GG ( c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
|
|
b = GG ( b, c, d, a, x[12], S24, 0x0d2a4c8b+0x7fffffff); /* 32 */
|
|
|
|
/* Round 3 */
|
|
a = HH ( a, b, c, d, x[ 5], S31, 0x7ffa3943+0x7fffffff); /* 33 */
|
|
d = HH ( d, a, b, c, x[ 8], S32, 0x0771f682+0x7fffffff); /* 34 */
|
|
c = HH ( c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
|
|
b = HH ( b, c, d, a, x[14], S34, 0x7de5380d+0x7fffffff); /* 36 */
|
|
a = HH ( a, b, c, d, x[ 1], S31, 0x24beea45+0x7fffffff); /* 37 */
|
|
d = HH ( d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
|
|
c = HH ( c, d, a, b, x[ 7], S33, 0x76bb4b61+0x7fffffff); /* 39 */
|
|
b = HH ( b, c, d, a, x[10], S34, 0x3ebfbc71+0x7fffffff); /* 40 */
|
|
a = HH ( a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
|
|
d = HH ( d, a, b, c, x[ 0], S32, 0x6aa127fb+0x7fffffff); /* 42 */
|
|
c = HH ( c, d, a, b, x[ 3], S33, 0x54ef3086+0x7fffffff); /* 43 */
|
|
b = HH ( b, c, d, a, x[ 6], S34, 0x04881d05); /* 44 */
|
|
a = HH ( a, b, c, d, x[ 9], S31, 0x59d4d03a+0x7fffffff); /* 45 */
|
|
d = HH ( d, a, b, c, x[12], S32, 0x66db99e6+0x7fffffff); /* 46 */
|
|
c = HH ( c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
|
|
b = HH ( b, c, d, a, x[ 2], S34, 0x44ac5666+0x7fffffff); /* 48 */
|
|
|
|
/* Round 4 */
|
|
a = II ( a, b, c, d, x[ 0], S41, 0x74292245+0x7fffffff); /* 49 */
|
|
d = II ( d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
|
|
c = II ( c, d, a, b, x[14], S43, 0x2b9423a8+0x7fffffff); /* 51 */
|
|
b = II ( b, c, d, a, x[ 5], S44, 0x7c93a03a+0x7fffffff); /* 52 */
|
|
a = II ( a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
|
|
d = II ( d, a, b, c, x[ 3], S42, 0x0f0ccc93+0x7fffffff); /* 54 */
|
|
c = II ( c, d, a, b, x[10], S43, 0x7feff47e+0x7fffffff); /* 55 */
|
|
b = II ( b, c, d, a, x[ 1], S44, 0x05845dd2+0x7fffffff); /* 56 */
|
|
a = II ( a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
|
|
d = II ( d, a, b, c, x[15], S42, 0x7e2ce6e1+0x7fffffff); /* 58 */
|
|
c = II ( c, d, a, b, x[ 6], S43, 0x23014315+0x7fffffff); /* 59 */
|
|
b = II ( b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
|
|
a = II ( a, b, c, d, x[ 4], S41, 0x77537e83+0x7fffffff); /* 61 */
|
|
d = II ( d, a, b, c, x[11], S42, 0x3d3af236+0x7fffffff); /* 62 */
|
|
c = II ( c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
|
|
b = II ( b, c, d, a, x[ 9], S44, 0x6b86d392+0x7fffffff); /* 64 */
|
|
|
|
state[0] +=a;
|
|
state[1] +=b;
|
|
state[2] +=c;
|
|
state[3] +=d;
|
|
|
|
}
|
|
|
|
function init() {
|
|
count[0]=count[1] = 0;
|
|
state[0] = 0x67452301;
|
|
state[1] = 0x6fcdab8a+0x7fffffff;
|
|
state[2] = 0x18badcff+0x7fffffff;
|
|
state[3] = 0x10325476;
|
|
for (i = 0; i < digestBits.length; i++)
|
|
digestBits[i] = 0;
|
|
}
|
|
|
|
function update(b) {
|
|
var index,i;
|
|
|
|
index = and(shr(count[0],3) , 0x3f);
|
|
if (count[0]<0x7fffffff+0x7fffffff-6)
|
|
count[0] += 8;
|
|
else {
|
|
count[1]++;
|
|
count[0]-=0x7fffffff+0x7fffffff+2;
|
|
count[0]+=8;
|
|
}
|
|
buffer[index] = and(b,0xff);
|
|
if (index >= 63) {
|
|
transform(buffer, 0);
|
|
}
|
|
}
|
|
|
|
function finish() {
|
|
var bits = new array(8);
|
|
var padding;
|
|
var i=0, index=0, padLen=0;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
bits[i] = and(shr(count[0],(i * 8)), 0xff);
|
|
}
|
|
for (i = 0; i < 4; i++) {
|
|
bits[i+4]=and(shr(count[1],(i * 8)), 0xff);
|
|
}
|
|
index = and(shr(count[0], 3) ,0x3f);
|
|
padLen = (index < 56) ? (56 - index) : (120 - index);
|
|
padding = new array(64);
|
|
padding[0] = 0x80;
|
|
for (i=0;i<padLen;i++)
|
|
update(padding[i]);
|
|
for (i=0;i<8;i++)
|
|
update(bits[i]);
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
for (j = 0; j < 4; j++) {
|
|
digestBits[i*4+j] = and(shr(state[i], (j * 8)) , 0xff);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* End of the MD5 algorithm */
|
|
|
|
function hexa(n) {
|
|
var hexa_h = "0123456789abcdef";
|
|
var hexa_c="";
|
|
var hexa_m=n;
|
|
for (hexa_i=0;hexa_i<8;hexa_i++) {
|
|
hexa_c=hexa_h.charAt(Math.abs(hexa_m)%16)+hexa_c;
|
|
hexa_m=Math.floor(hexa_m/16);
|
|
}
|
|
return hexa_c;
|
|
}
|
|
|
|
|
|
var ascii="01234567890123456789012345678901" +
|
|
" !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ"+
|
|
"[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~";
|
|
|
|
function MD5(entree)
|
|
{
|
|
var l,s,k,ka,kb,kc,kd;
|
|
|
|
init();
|
|
for (k=0;k<entree.length;k++) {
|
|
l=entree.charAt(k);
|
|
update(ascii.lastIndexOf(l));
|
|
}
|
|
finish();
|
|
ka=kb=kc=kd=0;
|
|
for (i=0;i<4;i++) ka+=shl(digestBits[15-i], (i*8));
|
|
for (i=4;i<8;i++) kb+=shl(digestBits[15-i], ((i-4)*8));
|
|
for (i=8;i<12;i++) kc+=shl(digestBits[15-i], ((i-8)*8));
|
|
for (i=12;i<16;i++) kd+=shl(digestBits[15-i], ((i-12)*8));
|
|
s=hexa(kd)+hexa(kc)+hexa(kb)+hexa(ka);
|
|
return s;
|
|
}
|
|
|
|
loaded_MD5=true
|