js-sha1-webpack
Version:
A simple SHA1 hash function for JavaScript supports UTF-8 encoding. Works with webpack.
251 lines (218 loc) • 8.55 kB
JavaScript
/*
* js-sha1 v0.3.0
* https://github.com/emn178/js-sha1
*
* Copyright 2014-2015, emn178@gmail.com
*
* Licensed under the MIT license:
* http://www.opensource.org/licenses/MIT
*/
;(function(){
'use strict';
var HEX_CHARS = '0123456789abcdef'.split('');
var EXTRA = [-2147483648, 8388608, 32768, 128];
var SHIFT = [24, 16, 8, 0];
var blocks = [];
/**
Returns an sha1 of message.
@digest - optional. Set true to return numeric array, set false to return a hex string. default=false
*/
var sha1 = function(message, digest) {
digest = !!digest; // default of false
var notString = typeof(message) != 'string';
if(notString && message.constructor == ArrayBuffer) {
message = new Uint8Array(message);
}
var h0, h1, h2, h3, h4, block = 0, code, end = false, t, f,
i, j, index = 0, start = 0, bytes = 0, length = message.length;
h0 = 0x67452301;
h1 = 0xEFCDAB89;
h2 = 0x98BADCFE;
h3 = 0x10325476;
h4 = 0xC3D2E1F0;
do {
blocks[0] = block;
blocks[16] = blocks[1] = blocks[2] = blocks[3] =
blocks[4] = blocks[5] = blocks[6] = blocks[7] =
blocks[8] = blocks[9] = blocks[10] = blocks[11] =
blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0;
if(notString) {
for (i = start;index < length && i < 64; ++index) {
blocks[i >> 2] |= message[index] << SHIFT[i++ & 3];
}
} else {
for (i = start;index < length && i < 64; ++index) {
code = message.charCodeAt(index);
if (code < 0x80) {
blocks[i >> 2] |= code << SHIFT[i++ & 3];
} else if (code < 0x800) {
blocks[i >> 2] |= (0xc0 | (code >> 6)) << SHIFT[i++ & 3];
blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
} else if (code < 0xd800 || code >= 0xe000) {
blocks[i >> 2] |= (0xe0 | (code >> 12)) << SHIFT[i++ & 3];
blocks[i >> 2] |= (0x80 | ((code >> 6) & 0x3f)) << SHIFT[i++ & 3];
blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
} else {
code = 0x10000 + (((code & 0x3ff) << 10) | (message.charCodeAt(++index) & 0x3ff));
blocks[i >> 2] |= (0xf0 | (code >> 18)) << SHIFT[i++ & 3];
blocks[i >> 2] |= (0x80 | ((code >> 12) & 0x3f)) << SHIFT[i++ & 3];
blocks[i >> 2] |= (0x80 | ((code >> 6) & 0x3f)) << SHIFT[i++ & 3];
blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
}
}
}
bytes += i - start;
start = i - 64;
if(index == length) {
blocks[i >> 2] |= EXTRA[i & 3];
++index;
}
block = blocks[16];
if(index > length && i < 56) {
blocks[15] = bytes << 3;
end = true;
}
for(j = 16;j < 80;++j) {
t = blocks[j - 3] ^ blocks[j - 8] ^ blocks[j - 14] ^ blocks[j - 16];
blocks[j] = (t << 1) | (t >>> 31);
}
var a = h0, b = h1, c = h2, d = h3, e = h4;
for(j = 0;j < 20;j += 5) {
f = (b & c) | ((~b) & d);
t = (a << 5) | (a >>> 27);
e = t + f + e + 1518500249 + blocks[j] << 0;
b = (b << 30) | (b >>> 2);
f = (a & b) | ((~a) & c);
t = (e << 5) | (e >>> 27);
d = t + f + d + 1518500249 + blocks[j + 1] << 0;
a = (a << 30) | (a >>> 2);
f = (e & a) | ((~e) & b);
t = (d << 5) | (d >>> 27);
c = t + f + c + 1518500249 + blocks[j + 2] << 0;
e = (e << 30) | (e >>> 2);
f = (d & e) | ((~d) & a);
t = (c << 5) | (c >>> 27);
b = t + f + b + 1518500249 + blocks[j + 3] << 0;
d = (d << 30) | (d >>> 2);
f = (c & d) | ((~c) & e);
t = (b << 5) | (b >>> 27);
a = t + f + a + 1518500249 + blocks[j + 4] << 0;
c = (c << 30) | (c >>> 2);
}
for(;j < 40;j += 5) {
f = b ^ c ^ d;
t = (a << 5) | (a >>> 27);
e = t + f + e + 1859775393 + blocks[j] << 0;
b = (b << 30) | (b >>> 2);
f = a ^ b ^ c;
t = (e << 5) | (e >>> 27);
d = t + f + d + 1859775393 + blocks[j + 1] << 0;
a = (a << 30) | (a >>> 2);
f = e ^ a ^ b;
t = (d << 5) | (d >>> 27);
c = t + f + c + 1859775393 + blocks[j + 2] << 0;
e = (e << 30) | (e >>> 2);
f = d ^ e ^ a;
t = (c << 5) | (c >>> 27);
b = t + f + b + 1859775393 + blocks[j + 3] << 0;
d = (d << 30) | (d >>> 2);
f = c ^ d ^ e;
t = (b << 5) | (b >>> 27);
a = t + f + a + 1859775393 + blocks[j + 4] << 0;
c = (c << 30) | (c >>> 2);
}
for(;j < 60;j += 5) {
f = (b & c) | (b & d) | (c & d);
t = (a << 5) | (a >>> 27);
e = t + f + e - 1894007588 + blocks[j] << 0;
b = (b << 30) | (b >>> 2);
f = (a & b) | (a & c) | (b & c);
t = (e << 5) | (e >>> 27);
d = t + f + d - 1894007588 + blocks[j + 1] << 0;
a = (a << 30) | (a >>> 2);
f = (e & a) | (e & b) | (a & b);
t = (d << 5) | (d >>> 27);
c = t + f + c - 1894007588 + blocks[j + 2] << 0;
e = (e << 30) | (e >>> 2);
f = (d & e) | (d & a) | (e & a);
t = (c << 5) | (c >>> 27);
b = t + f + b - 1894007588 + blocks[j + 3] << 0;
d = (d << 30) | (d >>> 2);
f = (c & d) | (c & e) | (d & e);
t = (b << 5) | (b >>> 27);
a = t + f + a - 1894007588 + blocks[j + 4] << 0;
c = (c << 30) | (c >>> 2);
}
for(;j < 80;j += 5) {
f = b ^ c ^ d;
t = (a << 5) | (a >>> 27);
e = t + f + e - 899497514 + blocks[j] << 0;
b = (b << 30) | (b >>> 2);
f = a ^ b ^ c;
t = (e << 5) | (e >>> 27);
d = t + f + d - 899497514 + blocks[j + 1] << 0;
a = (a << 30) | (a >>> 2);
f = e ^ a ^ b;
t = (d << 5) | (d >>> 27);
c = t + f + c - 899497514 + blocks[j + 2] << 0;
e = (e << 30) | (e >>> 2);
f = d ^ e ^ a;
t = (c << 5) | (c >>> 27);
b = t + f + b - 899497514 + blocks[j + 3] << 0;
d = (d << 30) | (d >>> 2);
f = c ^ d ^ e;
t = (b << 5) | (b >>> 27);
a = t + f + a - 899497514 + blocks[j + 4] << 0;
c = (c << 30) | (c >>> 2);
}
h0 = h0 + a << 0;
h1 = h1 + b << 0;
h2 = h2 + c << 0;
h3 = h3 + d << 0;
h4 = h4 + e << 0;
} while(!end);
if(!digest) {
return HEX_CHARS[(h0 >> 28) & 0x0F] + HEX_CHARS[(h0 >> 24) & 0x0F] +
HEX_CHARS[(h0 >> 20) & 0x0F] + HEX_CHARS[(h0 >> 16) & 0x0F] +
HEX_CHARS[(h0 >> 12) & 0x0F] + HEX_CHARS[(h0 >> 8) & 0x0F] +
HEX_CHARS[(h0 >> 4) & 0x0F] + HEX_CHARS[h0 & 0x0F] +
HEX_CHARS[(h1 >> 28) & 0x0F] + HEX_CHARS[(h1 >> 24) & 0x0F] +
HEX_CHARS[(h1 >> 20) & 0x0F] + HEX_CHARS[(h1 >> 16) & 0x0F] +
HEX_CHARS[(h1 >> 12) & 0x0F] + HEX_CHARS[(h1 >> 8) & 0x0F] +
HEX_CHARS[(h1 >> 4) & 0x0F] + HEX_CHARS[h1 & 0x0F] +
HEX_CHARS[(h2 >> 28) & 0x0F] + HEX_CHARS[(h2 >> 24) & 0x0F] +
HEX_CHARS[(h2 >> 20) & 0x0F] + HEX_CHARS[(h2 >> 16) & 0x0F] +
HEX_CHARS[(h2 >> 12) & 0x0F] + HEX_CHARS[(h2 >> 8) & 0x0F] +
HEX_CHARS[(h2 >> 4) & 0x0F] + HEX_CHARS[h2 & 0x0F] +
HEX_CHARS[(h3 >> 28) & 0x0F] + HEX_CHARS[(h3 >> 24) & 0x0F] +
HEX_CHARS[(h3 >> 20) & 0x0F] + HEX_CHARS[(h3 >> 16) & 0x0F] +
HEX_CHARS[(h3 >> 12) & 0x0F] + HEX_CHARS[(h3 >> 8) & 0x0F] +
HEX_CHARS[(h3 >> 4) & 0x0F] + HEX_CHARS[h3 & 0x0F] +
HEX_CHARS[(h4 >> 28) & 0x0F] + HEX_CHARS[(h4 >> 24) & 0x0F] +
HEX_CHARS[(h4 >> 20) & 0x0F] + HEX_CHARS[(h4 >> 16) & 0x0F] +
HEX_CHARS[(h4 >> 12) & 0x0F] + HEX_CHARS[(h4 >> 8) & 0x0F] +
HEX_CHARS[(h4 >> 4) & 0x0F] + HEX_CHARS[h4 & 0x0F];
}
return [(h0 >> 24) & 0xFF,
(h0 >> 16) & 0xFF,
(h0 >> 8) & 0xFF,
h0 & 0xFF,
(h1 >> 24) & 0xFF,
(h1 >> 16) & 0xFF,
(h1 >> 8) & 0xFF,
h1 & 0xFF,
(h2 >> 24) & 0xFF,
(h2 >> 16) & 0xFF,
(h2 >> 8) & 0xFF,
h2 & 0xFF,
(h3 >> 24) & 0xFF,
(h3 >> 16) & 0xFF,
(h3 >> 8) & 0xFF,
h3 & 0xFF,
(h4 >> 24) & 0xFF,
(h4 >> 16) & 0xFF,
(h4 >> 8) & 0xFF,
h4 & 0xFF]
};
module.exports = sha1;
}(this));