blossom-cloudron/public/lib/@noble/hashes/utils.js

/*! noble-hashes - MIT License (c) 2022 Paul Miller (paulmillr.com) */
// 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.
import { crypto } from './crypto.js';
import { bytes as abytes } from './_assert.js';
// export { isBytes } from './_assert.js';
// We can't reuse isBytes from _assert, because somehow this causes huge perf issues
export function isBytes(a) {
    return (a instanceof Uint8Array ||
        (a != null && typeof a === 'object' && a.constructor.name === 'Uint8Array'));
}
// Cast array to different type
export const u8 = (arr) => new Uint8Array(arr.buffer, arr.byteOffset, arr.byteLength);
export const u32 = (arr) => new Uint32Array(arr.buffer, arr.byteOffset, Math.floor(arr.byteLength / 4));
// Cast array to view
export const createView = (arr) => new DataView(arr.buffer, arr.byteOffset, arr.byteLength);
// The rotate right (circular right shift) operation for uint32
export const rotr = (word, shift) => (word << (32 - shift)) | (word >>> shift);
// The rotate left (circular left shift) operation for uint32
export const rotl = (word, shift) => (word << shift) | ((word >>> (32 - shift)) >>> 0);
export const isLE = new Uint8Array(new Uint32Array([0x11223344]).buffer)[0] === 0x44;
// The byte swap operation for uint32
export const byteSwap = (word) => ((word << 24) & 0xff000000) |
    ((word << 8) & 0xff0000) |
    ((word >>> 8) & 0xff00) |
    ((word >>> 24) & 0xff);
// Conditionally byte swap if on a big-endian platform
export const byteSwapIfBE = isLE ? (n) => n : (n) => byteSwap(n);
// In place byte swap for Uint32Array
export function byteSwap32(arr) {
    for (let i = 0; i < arr.length; i++) {
        arr[i] = byteSwap(arr[i]);
    }
}
// Array where index 0xf0 (240) is mapped to string 'f0'
const hexes = /* @__PURE__ */ Array.from({ length: 256 }, (_, i) => i.toString(16).padStart(2, '0'));
/**
 * @example bytesToHex(Uint8Array.from([0xca, 0xfe, 0x01, 0x23])) // 'cafe0123'
 */
export function bytesToHex(bytes) {
    abytes(bytes);
    // 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(char) {
    if (char >= asciis._0 && char <= asciis._9)
        return char - asciis._0;
    if (char >= asciis._A && char <= asciis._F)
        return char - (asciis._A - 10);
    if (char >= asciis._a && char <= asciis._f)
        return char - (asciis._a - 10);
    return;
}
/**
 * @example hexToBytes('cafe0123') // Uint8Array.from([0xca, 0xfe, 0x01, 0x23])
 */
export function hexToBytes(hex) {
    if (typeof hex !== 'string')
        throw new Error('hex string expected, got ' + typeof hex);
    const hl = hex.length;
    const al = hl / 2;
    if (hl % 2)
        throw new Error('padded 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;
    }
    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.
export const nextTick = async () => { };
// Returns control to thread each 'tick' ms to avoid blocking
export 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 nextTick();
        ts += diff;
    }
}
/**
 * @example utf8ToBytes('abc') // new Uint8Array([97, 98, 99])
 */
export function utf8ToBytes(str) {
    if (typeof str !== 'string')
        throw new Error(`utf8ToBytes expected string, got ${typeof str}`);
    return new Uint8Array(new TextEncoder().encode(str)); // https://bugzil.la/1681809
}
/**
 * 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.
 */
export function toBytes(data) {
    if (typeof data === 'string')
        data = utf8ToBytes(data);
    abytes(data);
    return data;
}
/**
 * Copies several Uint8Arrays into one.
 */
export 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;
}
// For runtime check if class implements interface
export class Hash {
    // Safe version that clones internal state
    clone() {
        return this._cloneInto();
    }
}
const toStr = {}.toString;
export function checkOpts(defaults, opts) {
    if (opts !== undefined && toStr.call(opts) !== '[object Object]')
        throw new Error('Options should be object or undefined');
    const merged = Object.assign(defaults, opts);
    return merged;
}
export function wrapConstructor(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;
}
export function wrapConstructorWithOpts(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;
}
export function wrapXOFConstructorWithOpts(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;
}
/**
 * Secure PRNG. Uses `crypto.getRandomValues`, which defers to OS.
 */
export function randomBytes(bytesLength = 32) {
    if (crypto && typeof crypto.getRandomValues === 'function') {
        return crypto.getRandomValues(new Uint8Array(bytesLength));
    }
    throw new Error('crypto.getRandomValues must be defined');
}
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