mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-15 14:24:51 +00:00
144 lines
3.4 KiB
JavaScript
Executable File
144 lines
3.4 KiB
JavaScript
Executable File
//--
|
|
//-- Crypto functions and associated conversion routines
|
|
//--
|
|
|
|
// Crypto 'namespace'
|
|
function Crypto() {}
|
|
|
|
// Convert a string to an array of big-endian 32-bit words
|
|
Crypto.strToBe32s = function(str)
|
|
{
|
|
var be=[];
|
|
var len=Math.floor(str.length/4);
|
|
var i, j;
|
|
for(i=0, j=0; i<len; i++, j+=4) {
|
|
be[i]=((str.charCodeAt(j)&0xff) << 24)|((str.charCodeAt(j+1)&0xff) << 16)|((str.charCodeAt(j+2)&0xff) << 8)|(str.charCodeAt(j+3)&0xff);
|
|
}
|
|
while(j<str.length) {
|
|
be[j>>2] |= (str.charCodeAt(j)&0xff)<<(24-(j*8)%32);
|
|
j++;
|
|
}
|
|
return be;
|
|
};
|
|
|
|
// Convert an array of big-endian 32-bit words to a string
|
|
Crypto.be32sToStr = function(be)
|
|
{
|
|
var str='';
|
|
for(var i=0;i<be.length*32;i+=8) {
|
|
str += String.fromCharCode((be[i>>5]>>>(24-i%32)) & 0xff);
|
|
}
|
|
return str;
|
|
};
|
|
|
|
// Convert an array of big-endian 32-bit words to a hex string
|
|
Crypto.be32sToHex = function(be)
|
|
{
|
|
var hex='0123456789ABCDEF';
|
|
var str='';
|
|
for(var i=0;i<be.length*4;i++) {
|
|
str += hex.charAt((be[i>>2]>>((3-i%4)*8+4))&0xF) + hex.charAt((be[i>>2]>>((3-i%4)*8))&0xF);
|
|
}
|
|
return str;
|
|
};
|
|
|
|
// Return, in hex, the SHA-1 hash of a string
|
|
Crypto.hexSha1Str = function(str)
|
|
{
|
|
return Crypto.be32sToHex(Crypto.sha1Str(str));
|
|
};
|
|
|
|
// Return the SHA-1 hash of a string
|
|
Crypto.sha1Str = function(str)
|
|
{
|
|
return Crypto.sha1(Crypto.strToBe32s(str),str.length);
|
|
};
|
|
|
|
// Calculate the SHA-1 hash of an array of blen bytes of big-endian 32-bit words
|
|
Crypto.sha1 = function(x,blen)
|
|
{
|
|
// Add 32-bit integers, wrapping at 32 bits
|
|
//# Uses 16-bit operations internally to work around bugs in some JavaScript interpreters.
|
|
function add32(a,b)
|
|
{
|
|
var lsw=(a&0xFFFF)+(b&0xFFFF);
|
|
var msw=(a>>16)+(b>>16)+(lsw>>16);
|
|
return (msw<<16)|(lsw&0xFFFF);
|
|
}
|
|
//# Cryptographic round helper function. Add five 32-bit integers, wrapping at 32 bits, second parameter is rotated left 5 bits before the addition
|
|
//# Uses 16-bit operations internally to work around bugs in some JavaScript interpreters.
|
|
function AA(a,b,c,d,e)
|
|
{
|
|
b=(b>>>27)|(b<<5);
|
|
var lsw=(a&0xFFFF)+(b&0xFFFF)+(c&0xFFFF)+(d&0xFFFF)+(e&0xFFFF);
|
|
var msw=(a>>16)+(b>>16)+(c>>16)+(d>>16)+(e>>16)+(lsw>>16);
|
|
return (msw<<16)|(lsw&0xFFFF);
|
|
}
|
|
//# Cryptographic round helper function.
|
|
function RR(w,j)
|
|
{
|
|
var n=w[j-3]^w[j-8]^w[j-14]^w[j-16];
|
|
return (n>>>31)|(n<<1);
|
|
}
|
|
|
|
var len=blen*8;
|
|
//# Append padding so length in bits is 448 mod 512
|
|
x[len>>5] |= 0x80 << (24-len%32);
|
|
//# Append length
|
|
x[((len+64>>9)<<4)+15]=len;
|
|
var w=new Array(80);
|
|
|
|
var k1=0x5A827999;
|
|
var k2=0x6ED9EBA1;
|
|
var k3=0x8F1BBCDC;
|
|
var k4=0xCA62C1D6;
|
|
|
|
var h0=0x67452301;
|
|
var h1=0xEFCDAB89;
|
|
var h2=0x98BADCFE;
|
|
var h3=0x10325476;
|
|
var h4=0xC3D2E1F0;
|
|
|
|
for(var i=0;i<x.length;i+=16) {
|
|
var j=0;
|
|
var t;
|
|
var a=h0;
|
|
var b=h1;
|
|
var c=h2;
|
|
var d=h3;
|
|
var e=h4;
|
|
while(j<16) {
|
|
w[j]=x[i+j];
|
|
t=AA(e,a,d^(b&(c^d)),w[j],k1);
|
|
e=d; d=c; c=(b>>>2)|(b<<30); b=a; a=t; j++;
|
|
}
|
|
while(j<20) {
|
|
w[j]=RR(w,j);
|
|
t=AA(e,a,d^(b&(c^d)),w[j],k1);
|
|
e=d; d=c; c=(b>>>2)|(b<<30); b=a; a=t; j++;
|
|
}
|
|
while(j<40) {
|
|
w[j]=RR(w,j);
|
|
t=AA(e,a,b^c^d,w[j],k2);
|
|
e=d; d=c; c=(b>>>2)|(b<<30); b=a; a=t; j++;
|
|
}
|
|
while(j<60) {
|
|
w[j]=RR(w,j);
|
|
t=AA(e,a,(b&c)|(d&(b|c)),w[j],k3);
|
|
e=d; d=c; c=(b>>>2)|(b<<30); b=a; a=t; j++;
|
|
}
|
|
while(j<80) {
|
|
w[j]=RR(w,j);
|
|
t=AA(e,a,b^c^d,w[j],k4);
|
|
e=d; d=c; c=(b>>>2)|(b<<30); b=a; a=t; j++;
|
|
}
|
|
h0=add32(h0,a);
|
|
h1=add32(h1,b);
|
|
h2=add32(h2,c);
|
|
h3=add32(h3,d);
|
|
h4=add32(h4,e);
|
|
}
|
|
return [h0,h1,h2,h3,h4];
|
|
};
|
|
|