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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
'use strict';
import platform = require('vs/base/common/platform');
import bits = require('vs/base/common/bits/bits');
import encoding = require('vs/base/common/bits/encoding');
import types = require('vs/base/common/types');
function copy(dest: Uint8Array, destIndex: number, src: Uint8Array, srcIndex: number, count: number): number {
for (var i = 0, len = Math.min(dest.byteLength - destIndex, src.byteLength - srcIndex, count); i < len; i++) {
dest[destIndex + i] = src[srcIndex + i];
}
return len;
}
function fill(dest: Uint8Array, index: number = 0, count: number = dest.byteLength, value: number = 0): void {
for (var i = 0; i < count; i++) {
dest[index + i] = value;
}
}
export class SHA1 {
// Reference: http://en.wikipedia.org/wiki/SHA-1
private static BLOCK_SIZE = 64; // 512 / 8
private length: number;
private buffer: Uint8Array;
private bufferDV: DataView;
private bufferLength: number;
private bigBlock32: DataView;
private h0 = 0x67452301;
private h1 = 0xEFCDAB89;
private h2 = 0x98BADCFE;
private h3 = 0x10325476;
private h4 = 0xC3D2E1F0;
public static digest(data: string): string;
public static digest(data: Uint8Array): string;
public static digest(data: ArrayBuffer): string;
public static digest(data: DataView): string;
public static digest(data: any): string
{
var sha = new SHA1();
sha.update(data);
return sha.digest();
}
constructor() {
this.length = 0;
this.buffer = new Uint8Array(SHA1.BLOCK_SIZE);
this.bufferDV = new DataView(this.buffer.buffer);
this.bufferLength = 0;
this.bigBlock32 = new DataView(new ArrayBuffer(320)); // 80 * 4 = 320;
}
public update(data: string): void;
public update(data: Uint8Array): void;
public update(data: ArrayBuffer): void;
public update(data: DataView): void;
public update(arg: any): void {
if (!this.buffer) {
throw new Error('Digest already computed.');
}
var data: Uint8Array;
if (types.isString(arg)) {
data = new Uint8Array(encoding.encodeToUTF8(<string> arg));
} else if (arg instanceof ArrayBuffer) {
data = new Uint8Array(arg);
} else if (arg instanceof DataView) {
data = new Uint8Array((<DataView> arg).buffer);
} else {
data = <Uint8Array> arg;
}
var bytesRead = 0, totalBytesRead = 0;
while (totalBytesRead < data.byteLength) {
bytesRead = copy(this.buffer, this.bufferLength, data, totalBytesRead, data.byteLength);
this.bufferLength += bytesRead;
totalBytesRead += bytesRead;
if (this.bufferLength === SHA1.BLOCK_SIZE) {
this.step(this.bufferDV);
this.bufferLength = 0;
}
}
this.length += totalBytesRead;
}
public digest(): string {
if (this.buffer) {
this.wrapUp();
}
return bits.toHexString(this.h0) + bits.toHexString(this.h1) + bits.toHexString(this.h2) + bits.toHexString(this.h3) + bits.toHexString(this.h4);
}
private wrapUp(): void {
this.buffer[this.bufferLength++] = 0x80;
fill(this.buffer, this.bufferLength);
if (this.bufferLength > 56) {
this.step(this.bufferDV);
fill(this.buffer);
}
var ml = bits.multiply64(8, this.length);
this.bufferDV.setUint32(56, ml[0], false);
this.bufferDV.setUint32(60, ml[1], false);
this.step(this.bufferDV);
this.buffer = null;
this.bufferDV = null;
this.bufferLength = -1;
}
private step(data: DataView): void {
for (var j = 0; j < 64 /* 16*4 */; j += 4) {
this.bigBlock32.setUint32(j, data.getUint32(j, false), false);
}
for (j = 64; j < 320 /* 80*4 */; j += 4) {
this.bigBlock32.setUint32(j, bits.leftRotate((this.bigBlock32.getUint32(j - 12, false) ^ this.bigBlock32.getUint32(j - 32, false) ^ this.bigBlock32.getUint32(j - 56, false) ^ this.bigBlock32.getUint32(j - 64, false)), 1), false);
}
var a = this.h0;
var b = this.h1;
var c = this.h2;
var d = this.h3;
var e = this.h4;
var f: number, k: number;
var temp: number;
for (j = 0; j < 80; j++) {
if (j < 20) {
f = (b & c) | ((~b) & d);
k = 0x5A827999;
} else if (j < 40) {
f = b ^ c ^ d;
k = 0x6ED9EBA1;
} else if (j < 60) {
f = (b & c) | (b & d) | (c & d);
k = 0x8F1BBCDC;
} else {
f = b ^ c ^ d;
k = 0xCA62C1D6;
}
temp = (bits.leftRotate(a, 5) + f + e + k + this.bigBlock32.getUint32(j * 4, false)) & 0xffffffff;
e = d;
d = c;
c = bits.leftRotate(b, 30);
b = a;
a = temp;
}
this.h0 = (this.h0 + a) & 0xffffffff;
this.h1 = (this.h1 + b) & 0xffffffff;
this.h2 = (this.h2 + c) & 0xffffffff;
this.h3 = (this.h3 + d) & 0xffffffff;
this.h4 = (this.h4 + e) & 0xffffffff;
}
}
export function computeSHA1Hash(value:string, hasBOM:boolean, headerFn?:(length:number)=>string):string;
export function computeSHA1Hash(value:ArrayBuffer, hasBOM:boolean, headerFn?:(length:number)=>string):string;
export function computeSHA1Hash(value:any, hasBOM:boolean, headerFn?:(length:number)=>string):string {
if (typeof(ArrayBuffer) === 'undefined') {
return null; // IE9 does not know ArrayBuffer
}
var data = types.isString(value) ? encoding.encodeToUTF8(value, hasBOM) : <ArrayBuffer>value;
var hash = new SHA1();
if (headerFn) {
hash.update(headerFn(data.byteLength));
}
if (data.byteLength) {
hash.update(data);
}
return hash.digest();
}
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