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qwen/nodejs/node_modules/@noble/hashes/utils.js

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+"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');
+}
+//# sourceMappingURL=utils.js.map