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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/@noble/hashes
Просмотр файла: utils.js
"use strict";
/**
* Utilities for hex, bytes, CSPRNG.
* @module
*/
/*! noble-hashes - MIT License (c) 2022 Paul Miller (paulmillr.com) */
Object.defineProperty(exports, "__esModule", { value: true });
exports.wrapXOFConstructorWithOpts = exports.wrapConstructorWithOpts = exports.wrapConstructor = exports.Hash = exports.nextTick = exports.swap32IfBE = exports.byteSwapIfBE = exports.swap8IfBE = exports.isLE = void 0;
exports.isBytes = isBytes;
exports.anumber = anumber;
exports.abytes = abytes;
exports.ahash = ahash;
exports.aexists = aexists;
exports.aoutput = aoutput;
exports.u8 = u8;
exports.u32 = u32;
exports.clean = clean;
exports.createView = createView;
exports.rotr = rotr;
exports.rotl = rotl;
exports.byteSwap = byteSwap;
exports.byteSwap32 = byteSwap32;
exports.bytesToHex = bytesToHex;
exports.hexToBytes = hexToBytes;
exports.asyncLoop = asyncLoop;
exports.utf8ToBytes = utf8ToBytes;
exports.bytesToUtf8 = bytesToUtf8;
exports.toBytes = toBytes;
exports.kdfInputToBytes = kdfInputToBytes;
exports.concatBytes = concatBytes;
exports.checkOpts = checkOpts;
exports.createHasher = createHasher;
exports.createOptHasher = createOptHasher;
exports.createXOFer = createXOFer;
exports.randomBytes = randomBytes;
// We use WebCrypto aka globalThis.crypto, which exists in browsers and node.js 16+.
// node.js versions earlier than v19 don't declare it in global scope.
// For node.js, package.json#exports field mapping rewrites import
// from `crypto` to `cryptoNode`, which imports native module.
// Makes the utils un-importable in browsers without a bundler.
// Once node.js 18 is deprecated (2025-04-30), we can just drop the import.
const crypto_1 = require("@noble/hashes/crypto");
/** Checks if something is Uint8Array. Be careful: nodejs Buffer will return true. */
function isBytes(a) {
return a instanceof Uint8Array || (ArrayBuffer.isView(a) && a.constructor.name === 'Uint8Array');
}
/** Asserts something is positive integer. */
function anumber(n) {
if (!Number.isSafeInteger(n) || n < 0)
throw new Error('positive integer expected, got ' + n);
}
/** Asserts something is Uint8Array. */
function abytes(b, ...lengths) {
if (!isBytes(b))
throw new Error('Uint8Array expected');
if (lengths.length > 0 && !lengths.includes(b.length))
throw new Error('Uint8Array expected of length ' + lengths + ', got length=' + b.length);
}
/** Asserts something is hash */
function ahash(h) {
if (typeof h !== 'function' || typeof h.create !== 'function')
throw new Error('Hash should be wrapped by utils.createHasher');
anumber(h.outputLen);
anumber(h.blockLen);
}
/** Asserts a hash instance has not been destroyed / finished */
function aexists(instance, checkFinished = true) {
if (instance.destroyed)
throw new Error('Hash instance has been destroyed');
if (checkFinished && instance.finished)
throw new Error('Hash#digest() has already been called');
}
/** Asserts output is properly-sized byte array */
function aoutput(out, instance) {
abytes(out);
const min = instance.outputLen;
if (out.length < min) {
throw new Error('digestInto() expects output buffer of length at least ' + min);
}
}
/** Cast u8 / u16 / u32 to u8. */
function u8(arr) {
return new Uint8Array(arr.buffer, arr.byteOffset, arr.byteLength);
}
/** Cast u8 / u16 / u32 to u32. */
function u32(arr) {
return new Uint32Array(arr.buffer, arr.byteOffset, Math.floor(arr.byteLength / 4));
}
/** Zeroize a byte array. Warning: JS provides no guarantees. */
function clean(...arrays) {
for (let i = 0; i < arrays.length; i++) {
arrays[i].fill(0);
}
}
/** Create DataView of an array for easy byte-level manipulation. */
function createView(arr) {
return new DataView(arr.buffer, arr.byteOffset, arr.byteLength);
}
/** The rotate right (circular right shift) operation for uint32 */
function rotr(word, shift) {
return (word << (32 - shift)) | (word >>> shift);
}
/** The rotate left (circular left shift) operation for uint32 */
function rotl(word, shift) {
return (word << shift) | ((word >>> (32 - shift)) >>> 0);
}
/** Is current platform little-endian? Most are. Big-Endian platform: IBM */
exports.isLE = (() => new Uint8Array(new Uint32Array([0x11223344]).buffer)[0] === 0x44)();
/** The byte swap operation for uint32 */
function byteSwap(word) {
return (((word << 24) & 0xff000000) |
((word << 8) & 0xff0000) |
((word >>> 8) & 0xff00) |
((word >>> 24) & 0xff));
}
/** Conditionally byte swap if on a big-endian platform */
exports.swap8IfBE = exports.isLE
? (n) => n
: (n) => byteSwap(n);
/** @deprecated */
exports.byteSwapIfBE = exports.swap8IfBE;
/** In place byte swap for Uint32Array */
function byteSwap32(arr) {
for (let i = 0; i < arr.length; i++) {
arr[i] = byteSwap(arr[i]);
}
return arr;
}
exports.swap32IfBE = exports.isLE
? (u) => u
: byteSwap32;
// Built-in hex conversion https://caniuse.com/mdn-javascript_builtins_uint8array_fromhex
const hasHexBuiltin = /* @__PURE__ */ (() =>
// @ts-ignore
typeof Uint8Array.from([]).toHex === 'function' && typeof Uint8Array.fromHex === 'function')();
// Array where index 0xf0 (240) is mapped to string 'f0'
const hexes = /* @__PURE__ */ Array.from({ length: 256 }, (_, i) => i.toString(16).padStart(2, '0'));
/**
* Convert byte array to hex string. Uses built-in function, when available.
* @example bytesToHex(Uint8Array.from([0xca, 0xfe, 0x01, 0x23])) // 'cafe0123'
*/
function bytesToHex(bytes) {
abytes(bytes);
// @ts-ignore
if (hasHexBuiltin)
return bytes.toHex();
// pre-caching improves the speed 6x
let hex = '';
for (let i = 0; i < bytes.length; i++) {
hex += hexes[bytes[i]];
}
return hex;
}
// We use optimized technique to convert hex string to byte array
const asciis = { _0: 48, _9: 57, A: 65, F: 70, a: 97, f: 102 };
function asciiToBase16(ch) {
if (ch >= asciis._0 && ch <= asciis._9)
return ch - asciis._0; // '2' => 50-48
if (ch >= asciis.A && ch <= asciis.F)
return ch - (asciis.A - 10); // 'B' => 66-(65-10)
if (ch >= asciis.a && ch <= asciis.f)
return ch - (asciis.a - 10); // 'b' => 98-(97-10)
return;
}
/**
* Convert hex string to byte array. Uses built-in function, when available.
* @example hexToBytes('cafe0123') // Uint8Array.from([0xca, 0xfe, 0x01, 0x23])
*/
function hexToBytes(hex) {
if (typeof hex !== 'string')
throw new Error('hex string expected, got ' + typeof hex);
// @ts-ignore
if (hasHexBuiltin)
return Uint8Array.fromHex(hex);
const hl = hex.length;
const al = hl / 2;
if (hl % 2)
throw new Error('hex string expected, got unpadded hex of length ' + hl);
const array = new Uint8Array(al);
for (let ai = 0, hi = 0; ai < al; ai++, hi += 2) {
const n1 = asciiToBase16(hex.charCodeAt(hi));
const n2 = asciiToBase16(hex.charCodeAt(hi + 1));
if (n1 === undefined || n2 === undefined) {
const char = hex[hi] + hex[hi + 1];
throw new Error('hex string expected, got non-hex character "' + char + '" at index ' + hi);
}
array[ai] = n1 * 16 + n2; // multiply first octet, e.g. 'a3' => 10*16+3 => 160 + 3 => 163
}
return array;
}
/**
* There is no setImmediate in browser and setTimeout is slow.
* Call of async fn will return Promise, which will be fullfiled only on
* next scheduler queue processing step and this is exactly what we need.
*/
const nextTick = async () => { };
exports.nextTick = nextTick;
/** Returns control to thread each 'tick' ms to avoid blocking. */
async function asyncLoop(iters, tick, cb) {
let ts = Date.now();
for (let i = 0; i < iters; i++) {
cb(i);
// Date.now() is not monotonic, so in case if clock goes backwards we return return control too
const diff = Date.now() - ts;
if (diff >= 0 && diff < tick)
continue;
await (0, exports.nextTick)();
ts += diff;
}
}
/**
* Converts string to bytes using UTF8 encoding.
* @example utf8ToBytes('abc') // Uint8Array.from([97, 98, 99])
*/
function utf8ToBytes(str) {
if (typeof str !== 'string')
throw new Error('string expected');
return new Uint8Array(new TextEncoder().encode(str)); // https://bugzil.la/1681809
}
/**
* Converts bytes to string using UTF8 encoding.
* @example bytesToUtf8(Uint8Array.from([97, 98, 99])) // 'abc'
*/
function bytesToUtf8(bytes) {
return new TextDecoder().decode(bytes);
}
/**
* Normalizes (non-hex) string or Uint8Array to Uint8Array.
* Warning: when Uint8Array is passed, it would NOT get copied.
* Keep in mind for future mutable operations.
*/
function toBytes(data) {
if (typeof data === 'string')
data = utf8ToBytes(data);
abytes(data);
return data;
}
/**
* Helper for KDFs: consumes uint8array or string.
* When string is passed, does utf8 decoding, using TextDecoder.
*/
function kdfInputToBytes(data) {
if (typeof data === 'string')
data = utf8ToBytes(data);
abytes(data);
return data;
}
/** Copies several Uint8Arrays into one. */
function concatBytes(...arrays) {
let sum = 0;
for (let i = 0; i < arrays.length; i++) {
const a = arrays[i];
abytes(a);
sum += a.length;
}
const res = new Uint8Array(sum);
for (let i = 0, pad = 0; i < arrays.length; i++) {
const a = arrays[i];
res.set(a, pad);
pad += a.length;
}
return res;
}
function checkOpts(defaults, opts) {
if (opts !== undefined && {}.toString.call(opts) !== '[object Object]')
throw new Error('options should be object or undefined');
const merged = Object.assign(defaults, opts);
return merged;
}
/** For runtime check if class implements interface */
class Hash {
}
exports.Hash = Hash;
/** Wraps hash function, creating an interface on top of it */
function createHasher(hashCons) {
const hashC = (msg) => hashCons().update(toBytes(msg)).digest();
const tmp = hashCons();
hashC.outputLen = tmp.outputLen;
hashC.blockLen = tmp.blockLen;
hashC.create = () => hashCons();
return hashC;
}
function createOptHasher(hashCons) {
const hashC = (msg, opts) => hashCons(opts).update(toBytes(msg)).digest();
const tmp = hashCons({});
hashC.outputLen = tmp.outputLen;
hashC.blockLen = tmp.blockLen;
hashC.create = (opts) => hashCons(opts);
return hashC;
}
function createXOFer(hashCons) {
const hashC = (msg, opts) => hashCons(opts).update(toBytes(msg)).digest();
const tmp = hashCons({});
hashC.outputLen = tmp.outputLen;
hashC.blockLen = tmp.blockLen;
hashC.create = (opts) => hashCons(opts);
return hashC;
}
exports.wrapConstructor = createHasher;
exports.wrapConstructorWithOpts = createOptHasher;
exports.wrapXOFConstructorWithOpts = createXOFer;
/** Cryptographically secure PRNG. Uses internal OS-level `crypto.getRandomValues`. */
function randomBytes(bytesLength = 32) {
if (crypto_1.crypto && typeof crypto_1.crypto.getRandomValues === 'function') {
return crypto_1.crypto.getRandomValues(new Uint8Array(bytesLength));
}
// Legacy Node.js compatibility
if (crypto_1.crypto && typeof crypto_1.crypto.randomBytes === 'function') {
return Uint8Array.from(crypto_1.crypto.randomBytes(bytesLength));
}
throw new Error('crypto.getRandomValues must be defined');
}
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