mirror of
https://github.com/denoland/deno.git
synced 2024-11-23 15:16:54 -05:00
385 lines
11 KiB
TypeScript
385 lines
11 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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/*
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* [js-sha1]{@link https://github.com/emn178/js-sha1}
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*
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* @version 0.6.0
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* @author Chen, Yi-Cyuan [emn178@gmail.com]
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* @copyright Chen, Yi-Cyuan 2014-2017
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* @license MIT
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*/
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export type Message = string | number[] | ArrayBuffer;
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const HEX_CHARS = "0123456789abcdef".split("");
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const EXTRA = [-2147483648, 8388608, 32768, 128] as const;
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const SHIFT = [24, 16, 8, 0] as const;
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const blocks: number[] = [];
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export class Sha1 {
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#blocks!: number[];
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#block!: number;
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#start!: number;
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#bytes!: number;
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#hBytes!: number;
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#finalized!: boolean;
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#hashed!: boolean;
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#h0 = 0x67452301;
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#h1 = 0xefcdab89;
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#h2 = 0x98badcfe;
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#h3 = 0x10325476;
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#h4 = 0xc3d2e1f0;
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#lastByteIndex = 0;
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constructor(sharedMemory = false) {
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if (sharedMemory) {
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// deno-fmt-ignore
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blocks[0] = 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;
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this.#blocks = blocks;
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} else {
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this.#blocks = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
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}
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this.#h0 = 0x67452301;
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this.#h1 = 0xefcdab89;
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this.#h2 = 0x98badcfe;
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this.#h3 = 0x10325476;
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this.#h4 = 0xc3d2e1f0;
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this.#block = this.#start = this.#bytes = this.#hBytes = 0;
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this.#finalized = this.#hashed = false;
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}
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update(message: Message): this {
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if (this.#finalized) {
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return this;
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}
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let msg: string | number[] | Uint8Array | undefined;
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if (message instanceof ArrayBuffer) {
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msg = new Uint8Array(message);
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} else {
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msg = message;
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}
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let index = 0;
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const length = msg.length;
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const blocks = this.#blocks;
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while (index < length) {
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let i: number;
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if (this.#hashed) {
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this.#hashed = false;
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blocks[0] = this.#block;
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// deno-fmt-ignore
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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;
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}
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if (typeof msg !== "string") {
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for (i = this.#start; index < length && i < 64; ++index) {
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blocks[i >> 2] |= msg[index] << SHIFT[i++ & 3];
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}
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} else {
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for (i = this.#start; index < length && i < 64; ++index) {
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let code = msg.charCodeAt(index);
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if (code < 0x80) {
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blocks[i >> 2] |= code << SHIFT[i++ & 3];
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} else if (code < 0x800) {
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blocks[i >> 2] |= (0xc0 | (code >> 6)) << SHIFT[i++ & 3];
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blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
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} else if (code < 0xd800 || code >= 0xe000) {
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blocks[i >> 2] |= (0xe0 | (code >> 12)) << SHIFT[i++ & 3];
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blocks[i >> 2] |= (0x80 | ((code >> 6) & 0x3f)) << SHIFT[i++ & 3];
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blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
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} else {
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code = 0x10000 +
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(((code & 0x3ff) << 10) | (msg.charCodeAt(++index) & 0x3ff));
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blocks[i >> 2] |= (0xf0 | (code >> 18)) << SHIFT[i++ & 3];
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blocks[i >> 2] |= (0x80 | ((code >> 12) & 0x3f)) << SHIFT[i++ & 3];
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blocks[i >> 2] |= (0x80 | ((code >> 6) & 0x3f)) << SHIFT[i++ & 3];
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blocks[i >> 2] |= (0x80 | (code & 0x3f)) << SHIFT[i++ & 3];
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}
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}
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}
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this.#lastByteIndex = i;
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this.#bytes += i - this.#start;
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if (i >= 64) {
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this.#block = blocks[16];
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this.#start = i - 64;
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this.hash();
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this.#hashed = true;
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} else {
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this.#start = i;
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}
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}
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if (this.#bytes > 4294967295) {
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this.#hBytes += (this.#bytes / 4294967296) >>> 0;
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this.#bytes = this.#bytes >>> 0;
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}
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return this;
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}
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private finalize(): void {
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if (this.#finalized) {
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return;
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}
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this.#finalized = true;
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const blocks = this.#blocks;
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const i = this.#lastByteIndex;
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blocks[16] = this.#block;
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blocks[i >> 2] |= EXTRA[i & 3];
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this.#block = blocks[16];
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if (i >= 56) {
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if (!this.#hashed) {
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this.hash();
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}
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blocks[0] = this.#block;
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// deno-fmt-ignore
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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;
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}
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blocks[14] = (this.#hBytes << 3) | (this.#bytes >>> 29);
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blocks[15] = this.#bytes << 3;
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this.hash();
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}
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private hash(): void {
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let a = this.#h0;
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let b = this.#h1;
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let c = this.#h2;
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let d = this.#h3;
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let e = this.#h4;
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let f: number;
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let j: number;
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let t: number;
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const blocks = this.#blocks;
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for (j = 16; j < 80; ++j) {
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t = blocks[j - 3] ^ blocks[j - 8] ^ blocks[j - 14] ^ blocks[j - 16];
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blocks[j] = (t << 1) | (t >>> 31);
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}
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for (j = 0; j < 20; j += 5) {
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f = (b & c) | (~b & d);
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t = (a << 5) | (a >>> 27);
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e = (t + f + e + 1518500249 + blocks[j]) >>> 0;
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b = (b << 30) | (b >>> 2);
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f = (a & b) | (~a & c);
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t = (e << 5) | (e >>> 27);
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d = (t + f + d + 1518500249 + blocks[j + 1]) >>> 0;
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a = (a << 30) | (a >>> 2);
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f = (e & a) | (~e & b);
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t = (d << 5) | (d >>> 27);
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c = (t + f + c + 1518500249 + blocks[j + 2]) >>> 0;
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e = (e << 30) | (e >>> 2);
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f = (d & e) | (~d & a);
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t = (c << 5) | (c >>> 27);
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b = (t + f + b + 1518500249 + blocks[j + 3]) >>> 0;
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d = (d << 30) | (d >>> 2);
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f = (c & d) | (~c & e);
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t = (b << 5) | (b >>> 27);
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a = (t + f + a + 1518500249 + blocks[j + 4]) >>> 0;
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c = (c << 30) | (c >>> 2);
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}
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for (; j < 40; j += 5) {
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f = b ^ c ^ d;
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t = (a << 5) | (a >>> 27);
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e = (t + f + e + 1859775393 + blocks[j]) >>> 0;
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b = (b << 30) | (b >>> 2);
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f = a ^ b ^ c;
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t = (e << 5) | (e >>> 27);
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d = (t + f + d + 1859775393 + blocks[j + 1]) >>> 0;
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a = (a << 30) | (a >>> 2);
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f = e ^ a ^ b;
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t = (d << 5) | (d >>> 27);
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c = (t + f + c + 1859775393 + blocks[j + 2]) >>> 0;
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e = (e << 30) | (e >>> 2);
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f = d ^ e ^ a;
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t = (c << 5) | (c >>> 27);
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b = (t + f + b + 1859775393 + blocks[j + 3]) >>> 0;
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d = (d << 30) | (d >>> 2);
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f = c ^ d ^ e;
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t = (b << 5) | (b >>> 27);
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a = (t + f + a + 1859775393 + blocks[j + 4]) >>> 0;
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c = (c << 30) | (c >>> 2);
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}
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for (; j < 60; j += 5) {
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f = (b & c) | (b & d) | (c & d);
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t = (a << 5) | (a >>> 27);
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e = (t + f + e - 1894007588 + blocks[j]) >>> 0;
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b = (b << 30) | (b >>> 2);
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f = (a & b) | (a & c) | (b & c);
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t = (e << 5) | (e >>> 27);
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d = (t + f + d - 1894007588 + blocks[j + 1]) >>> 0;
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a = (a << 30) | (a >>> 2);
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f = (e & a) | (e & b) | (a & b);
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t = (d << 5) | (d >>> 27);
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c = (t + f + c - 1894007588 + blocks[j + 2]) >>> 0;
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e = (e << 30) | (e >>> 2);
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f = (d & e) | (d & a) | (e & a);
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t = (c << 5) | (c >>> 27);
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b = (t + f + b - 1894007588 + blocks[j + 3]) >>> 0;
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d = (d << 30) | (d >>> 2);
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f = (c & d) | (c & e) | (d & e);
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t = (b << 5) | (b >>> 27);
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a = (t + f + a - 1894007588 + blocks[j + 4]) >>> 0;
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c = (c << 30) | (c >>> 2);
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}
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for (; j < 80; j += 5) {
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f = b ^ c ^ d;
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t = (a << 5) | (a >>> 27);
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e = (t + f + e - 899497514 + blocks[j]) >>> 0;
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b = (b << 30) | (b >>> 2);
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f = a ^ b ^ c;
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t = (e << 5) | (e >>> 27);
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d = (t + f + d - 899497514 + blocks[j + 1]) >>> 0;
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a = (a << 30) | (a >>> 2);
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f = e ^ a ^ b;
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t = (d << 5) | (d >>> 27);
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c = (t + f + c - 899497514 + blocks[j + 2]) >>> 0;
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e = (e << 30) | (e >>> 2);
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f = d ^ e ^ a;
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t = (c << 5) | (c >>> 27);
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b = (t + f + b - 899497514 + blocks[j + 3]) >>> 0;
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d = (d << 30) | (d >>> 2);
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f = c ^ d ^ e;
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t = (b << 5) | (b >>> 27);
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a = (t + f + a - 899497514 + blocks[j + 4]) >>> 0;
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c = (c << 30) | (c >>> 2);
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}
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this.#h0 = (this.#h0 + a) >>> 0;
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this.#h1 = (this.#h1 + b) >>> 0;
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this.#h2 = (this.#h2 + c) >>> 0;
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this.#h3 = (this.#h3 + d) >>> 0;
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this.#h4 = (this.#h4 + e) >>> 0;
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}
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hex(): string {
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this.finalize();
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const h0 = this.#h0;
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const h1 = this.#h1;
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const h2 = this.#h2;
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const h3 = this.#h3;
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const h4 = this.#h4;
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return (
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HEX_CHARS[(h0 >> 28) & 0x0f] +
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HEX_CHARS[(h0 >> 24) & 0x0f] +
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HEX_CHARS[(h0 >> 20) & 0x0f] +
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HEX_CHARS[(h0 >> 16) & 0x0f] +
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HEX_CHARS[(h0 >> 12) & 0x0f] +
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HEX_CHARS[(h0 >> 8) & 0x0f] +
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HEX_CHARS[(h0 >> 4) & 0x0f] +
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HEX_CHARS[h0 & 0x0f] +
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HEX_CHARS[(h1 >> 28) & 0x0f] +
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HEX_CHARS[(h1 >> 24) & 0x0f] +
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HEX_CHARS[(h1 >> 20) & 0x0f] +
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HEX_CHARS[(h1 >> 16) & 0x0f] +
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HEX_CHARS[(h1 >> 12) & 0x0f] +
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HEX_CHARS[(h1 >> 8) & 0x0f] +
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HEX_CHARS[(h1 >> 4) & 0x0f] +
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HEX_CHARS[h1 & 0x0f] +
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HEX_CHARS[(h2 >> 28) & 0x0f] +
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HEX_CHARS[(h2 >> 24) & 0x0f] +
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HEX_CHARS[(h2 >> 20) & 0x0f] +
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HEX_CHARS[(h2 >> 16) & 0x0f] +
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HEX_CHARS[(h2 >> 12) & 0x0f] +
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HEX_CHARS[(h2 >> 8) & 0x0f] +
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HEX_CHARS[(h2 >> 4) & 0x0f] +
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HEX_CHARS[h2 & 0x0f] +
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HEX_CHARS[(h3 >> 28) & 0x0f] +
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HEX_CHARS[(h3 >> 24) & 0x0f] +
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HEX_CHARS[(h3 >> 20) & 0x0f] +
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HEX_CHARS[(h3 >> 16) & 0x0f] +
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HEX_CHARS[(h3 >> 12) & 0x0f] +
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HEX_CHARS[(h3 >> 8) & 0x0f] +
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HEX_CHARS[(h3 >> 4) & 0x0f] +
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HEX_CHARS[h3 & 0x0f] +
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HEX_CHARS[(h4 >> 28) & 0x0f] +
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HEX_CHARS[(h4 >> 24) & 0x0f] +
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HEX_CHARS[(h4 >> 20) & 0x0f] +
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HEX_CHARS[(h4 >> 16) & 0x0f] +
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HEX_CHARS[(h4 >> 12) & 0x0f] +
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HEX_CHARS[(h4 >> 8) & 0x0f] +
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HEX_CHARS[(h4 >> 4) & 0x0f] +
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HEX_CHARS[h4 & 0x0f]
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);
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}
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toString(): string {
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return this.hex();
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}
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digest(): number[] {
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this.finalize();
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const h0 = this.#h0;
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const h1 = this.#h1;
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const h2 = this.#h2;
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const h3 = this.#h3;
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const h4 = this.#h4;
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return [
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(h0 >> 24) & 0xff,
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(h0 >> 16) & 0xff,
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(h0 >> 8) & 0xff,
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h0 & 0xff,
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(h1 >> 24) & 0xff,
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(h1 >> 16) & 0xff,
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(h1 >> 8) & 0xff,
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h1 & 0xff,
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(h2 >> 24) & 0xff,
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(h2 >> 16) & 0xff,
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(h2 >> 8) & 0xff,
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h2 & 0xff,
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(h3 >> 24) & 0xff,
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(h3 >> 16) & 0xff,
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(h3 >> 8) & 0xff,
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h3 & 0xff,
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(h4 >> 24) & 0xff,
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(h4 >> 16) & 0xff,
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(h4 >> 8) & 0xff,
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h4 & 0xff,
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];
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}
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array(): number[] {
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return this.digest();
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}
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arrayBuffer(): ArrayBuffer {
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this.finalize();
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const buffer = new ArrayBuffer(20);
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const dataView = new DataView(buffer);
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dataView.setUint32(0, this.#h0);
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dataView.setUint32(4, this.#h1);
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dataView.setUint32(8, this.#h2);
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dataView.setUint32(12, this.#h3);
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dataView.setUint32(16, this.#h4);
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return buffer;
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}
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}
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