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thrower_daemon/node_modules/@noble/curves/abstract/utils.js
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thrower_daemon/node_modules/@noble/curves/abstract/utils.js
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.validateObject = exports.createHmacDrbg = exports.bitMask = exports.bitSet = exports.bitGet = exports.bitLen = exports.utf8ToBytes = exports.equalBytes = exports.concatBytes = exports.ensureBytes = exports.numberToVarBytesBE = exports.numberToBytesLE = exports.numberToBytesBE = exports.bytesToNumberLE = exports.bytesToNumberBE = exports.hexToBytes = exports.hexToNumber = exports.numberToHexUnpadded = exports.bytesToHex = void 0;
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/*! noble-curves - MIT License (c) 2022 Paul Miller (paulmillr.com) */
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// 100 lines of code in the file are duplicated from noble-hashes (utils).
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// This is OK: `abstract` directory does not use noble-hashes.
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// User may opt-in into using different hashing library. This way, noble-hashes
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// won't be included into their bundle.
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const _0n = BigInt(0);
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const _1n = BigInt(1);
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const _2n = BigInt(2);
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const u8a = (a) => a instanceof Uint8Array;
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const hexes = /* @__PURE__ */ Array.from({ length: 256 }, (_, i) => i.toString(16).padStart(2, '0'));
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/**
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* @example bytesToHex(Uint8Array.from([0xca, 0xfe, 0x01, 0x23])) // 'cafe0123'
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*/
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function bytesToHex(bytes) {
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if (!u8a(bytes))
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throw new Error('Uint8Array expected');
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// pre-caching improves the speed 6x
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let hex = '';
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for (let i = 0; i < bytes.length; i++) {
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hex += hexes[bytes[i]];
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}
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return hex;
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}
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exports.bytesToHex = bytesToHex;
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function numberToHexUnpadded(num) {
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const hex = num.toString(16);
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return hex.length & 1 ? `0${hex}` : hex;
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}
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exports.numberToHexUnpadded = numberToHexUnpadded;
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function hexToNumber(hex) {
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if (typeof hex !== 'string')
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throw new Error('hex string expected, got ' + typeof hex);
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// Big Endian
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return BigInt(hex === '' ? '0' : `0x${hex}`);
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}
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exports.hexToNumber = hexToNumber;
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/**
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* @example hexToBytes('cafe0123') // Uint8Array.from([0xca, 0xfe, 0x01, 0x23])
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*/
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function hexToBytes(hex) {
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if (typeof hex !== 'string')
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throw new Error('hex string expected, got ' + typeof hex);
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const len = hex.length;
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if (len % 2)
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throw new Error('padded hex string expected, got unpadded hex of length ' + len);
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const array = new Uint8Array(len / 2);
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for (let i = 0; i < array.length; i++) {
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const j = i * 2;
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const hexByte = hex.slice(j, j + 2);
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const byte = Number.parseInt(hexByte, 16);
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if (Number.isNaN(byte) || byte < 0)
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throw new Error('Invalid byte sequence');
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array[i] = byte;
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}
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return array;
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}
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exports.hexToBytes = hexToBytes;
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// BE: Big Endian, LE: Little Endian
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function bytesToNumberBE(bytes) {
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return hexToNumber(bytesToHex(bytes));
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}
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exports.bytesToNumberBE = bytesToNumberBE;
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function bytesToNumberLE(bytes) {
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if (!u8a(bytes))
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throw new Error('Uint8Array expected');
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return hexToNumber(bytesToHex(Uint8Array.from(bytes).reverse()));
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}
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exports.bytesToNumberLE = bytesToNumberLE;
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function numberToBytesBE(n, len) {
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return hexToBytes(n.toString(16).padStart(len * 2, '0'));
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}
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exports.numberToBytesBE = numberToBytesBE;
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function numberToBytesLE(n, len) {
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return numberToBytesBE(n, len).reverse();
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}
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exports.numberToBytesLE = numberToBytesLE;
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// Unpadded, rarely used
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function numberToVarBytesBE(n) {
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return hexToBytes(numberToHexUnpadded(n));
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}
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exports.numberToVarBytesBE = numberToVarBytesBE;
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/**
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* Takes hex string or Uint8Array, converts to Uint8Array.
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* Validates output length.
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* Will throw error for other types.
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* @param title descriptive title for an error e.g. 'private key'
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* @param hex hex string or Uint8Array
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* @param expectedLength optional, will compare to result array's length
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* @returns
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*/
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function ensureBytes(title, hex, expectedLength) {
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let res;
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if (typeof hex === 'string') {
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try {
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res = hexToBytes(hex);
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}
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catch (e) {
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throw new Error(`${title} must be valid hex string, got "${hex}". Cause: ${e}`);
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}
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}
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else if (u8a(hex)) {
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// Uint8Array.from() instead of hash.slice() because node.js Buffer
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// is instance of Uint8Array, and its slice() creates **mutable** copy
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res = Uint8Array.from(hex);
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}
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else {
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throw new Error(`${title} must be hex string or Uint8Array`);
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}
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const len = res.length;
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if (typeof expectedLength === 'number' && len !== expectedLength)
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throw new Error(`${title} expected ${expectedLength} bytes, got ${len}`);
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return res;
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}
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exports.ensureBytes = ensureBytes;
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/**
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* Copies several Uint8Arrays into one.
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*/
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function concatBytes(...arrays) {
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const r = new Uint8Array(arrays.reduce((sum, a) => sum + a.length, 0));
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let pad = 0; // walk through each item, ensure they have proper type
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arrays.forEach((a) => {
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if (!u8a(a))
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throw new Error('Uint8Array expected');
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r.set(a, pad);
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pad += a.length;
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});
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return r;
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}
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exports.concatBytes = concatBytes;
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function equalBytes(b1, b2) {
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// We don't care about timing attacks here
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if (b1.length !== b2.length)
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return false;
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for (let i = 0; i < b1.length; i++)
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if (b1[i] !== b2[i])
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return false;
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return true;
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}
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exports.equalBytes = equalBytes;
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/**
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* @example utf8ToBytes('abc') // new Uint8Array([97, 98, 99])
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*/
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function utf8ToBytes(str) {
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if (typeof str !== 'string')
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throw new Error(`utf8ToBytes expected string, got ${typeof str}`);
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return new Uint8Array(new TextEncoder().encode(str)); // https://bugzil.la/1681809
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}
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exports.utf8ToBytes = utf8ToBytes;
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// Bit operations
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/**
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* Calculates amount of bits in a bigint.
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* Same as `n.toString(2).length`
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*/
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function bitLen(n) {
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let len;
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for (len = 0; n > _0n; n >>= _1n, len += 1)
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;
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return len;
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}
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exports.bitLen = bitLen;
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/**
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* Gets single bit at position.
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* NOTE: first bit position is 0 (same as arrays)
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* Same as `!!+Array.from(n.toString(2)).reverse()[pos]`
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*/
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function bitGet(n, pos) {
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return (n >> BigInt(pos)) & _1n;
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}
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exports.bitGet = bitGet;
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/**
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* Sets single bit at position.
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*/
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const bitSet = (n, pos, value) => {
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return n | ((value ? _1n : _0n) << BigInt(pos));
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};
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exports.bitSet = bitSet;
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/**
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* Calculate mask for N bits. Not using ** operator with bigints because of old engines.
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* Same as BigInt(`0b${Array(i).fill('1').join('')}`)
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*/
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const bitMask = (n) => (_2n << BigInt(n - 1)) - _1n;
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exports.bitMask = bitMask;
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// DRBG
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const u8n = (data) => new Uint8Array(data); // creates Uint8Array
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const u8fr = (arr) => Uint8Array.from(arr); // another shortcut
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/**
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* Minimal HMAC-DRBG from NIST 800-90 for RFC6979 sigs.
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* @returns function that will call DRBG until 2nd arg returns something meaningful
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* @example
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* const drbg = createHmacDRBG<Key>(32, 32, hmac);
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* drbg(seed, bytesToKey); // bytesToKey must return Key or undefined
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*/
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function createHmacDrbg(hashLen, qByteLen, hmacFn) {
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if (typeof hashLen !== 'number' || hashLen < 2)
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throw new Error('hashLen must be a number');
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if (typeof qByteLen !== 'number' || qByteLen < 2)
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throw new Error('qByteLen must be a number');
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if (typeof hmacFn !== 'function')
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throw new Error('hmacFn must be a function');
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// Step B, Step C: set hashLen to 8*ceil(hlen/8)
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let v = u8n(hashLen); // Minimal non-full-spec HMAC-DRBG from NIST 800-90 for RFC6979 sigs.
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let k = u8n(hashLen); // Steps B and C of RFC6979 3.2: set hashLen, in our case always same
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let i = 0; // Iterations counter, will throw when over 1000
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const reset = () => {
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v.fill(1);
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k.fill(0);
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i = 0;
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};
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const h = (...b) => hmacFn(k, v, ...b); // hmac(k)(v, ...values)
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const reseed = (seed = u8n()) => {
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// HMAC-DRBG reseed() function. Steps D-G
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k = h(u8fr([0x00]), seed); // k = hmac(k || v || 0x00 || seed)
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v = h(); // v = hmac(k || v)
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if (seed.length === 0)
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return;
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k = h(u8fr([0x01]), seed); // k = hmac(k || v || 0x01 || seed)
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v = h(); // v = hmac(k || v)
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};
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const gen = () => {
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// HMAC-DRBG generate() function
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if (i++ >= 1000)
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throw new Error('drbg: tried 1000 values');
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let len = 0;
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const out = [];
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while (len < qByteLen) {
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v = h();
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const sl = v.slice();
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out.push(sl);
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len += v.length;
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}
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return concatBytes(...out);
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};
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const genUntil = (seed, pred) => {
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reset();
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reseed(seed); // Steps D-G
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let res = undefined; // Step H: grind until k is in [1..n-1]
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while (!(res = pred(gen())))
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reseed();
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reset();
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return res;
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};
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return genUntil;
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}
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exports.createHmacDrbg = createHmacDrbg;
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// Validating curves and fields
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const validatorFns = {
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bigint: (val) => typeof val === 'bigint',
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function: (val) => typeof val === 'function',
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boolean: (val) => typeof val === 'boolean',
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string: (val) => typeof val === 'string',
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stringOrUint8Array: (val) => typeof val === 'string' || val instanceof Uint8Array,
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isSafeInteger: (val) => Number.isSafeInteger(val),
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array: (val) => Array.isArray(val),
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field: (val, object) => object.Fp.isValid(val),
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hash: (val) => typeof val === 'function' && Number.isSafeInteger(val.outputLen),
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};
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// type Record<K extends string | number | symbol, T> = { [P in K]: T; }
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function validateObject(object, validators, optValidators = {}) {
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const checkField = (fieldName, type, isOptional) => {
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const checkVal = validatorFns[type];
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if (typeof checkVal !== 'function')
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throw new Error(`Invalid validator "${type}", expected function`);
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const val = object[fieldName];
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if (isOptional && val === undefined)
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return;
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if (!checkVal(val, object)) {
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throw new Error(`Invalid param ${String(fieldName)}=${val} (${typeof val}), expected ${type}`);
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}
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};
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for (const [fieldName, type] of Object.entries(validators))
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checkField(fieldName, type, false);
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for (const [fieldName, type] of Object.entries(optValidators))
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checkField(fieldName, type, true);
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return object;
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}
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exports.validateObject = validateObject;
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// validate type tests
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// const o: { a: number; b: number; c: number } = { a: 1, b: 5, c: 6 };
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// const z0 = validateObject(o, { a: 'isSafeInteger' }, { c: 'bigint' }); // Ok!
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// // Should fail type-check
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// const z1 = validateObject(o, { a: 'tmp' }, { c: 'zz' });
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// const z2 = validateObject(o, { a: 'isSafeInteger' }, { c: 'zz' });
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// const z3 = validateObject(o, { test: 'boolean', z: 'bug' });
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// const z4 = validateObject(o, { a: 'boolean', z: 'bug' });
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//# sourceMappingURL=utils.js.map
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