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• [DIR] ..
• [FILE] array.cjs
• [FILE] array.d.ts
• [FILE] derive.cjs
• [FILE] derive.d.ts
• [FILE] entropy.cjs
• [FILE] entropy.d.ts

Просмотр файла: entropy.cjs

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.bytesToBits = bytesToBits;
exports.convertRadix = convertRadix;
exports.crc8 = crc8;
exports.legacy1 = legacy1;
exports.legacy2 = legacy2;

var _bignumber = _interopRequireDefault(require("bignumber.js"));

var sha256 = _interopRequireWildcard(require("../primitive/sha256.cjs"));

function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }

function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * @param {string[]} words
 * @param {string[]} wordlist
 * @returns {[Uint8Array, number]}
 */
function legacy1(words, wordlist) {
  const indicies = words.map(word => wordlist.indexOf(word.toLowerCase()));
  const data = convertRadix(indicies, wordlist.length, 256, 33);
  const checksum = data[data.length - 1];
  const result = new Uint8Array(data.length - 1);

  for (let i = 0; i < data.length - 1; i += 1) {
    result[i] = data[i] ^ checksum;
  }

  return [result, checksum];
}
/**
 * @param {string[]} words
 * @param {string[]} wordlist
 * @returns {Promise<Uint8Array>}
 */


async function legacy2(words, wordlist) {
  const concatBitsLen = words.length * 11;
  /** @type {boolean[]} */

  const concatBits = [];
  concatBits.fill(false, 0, concatBitsLen);

  for (const [wordIndex, word] of words.entries()) {
    const index = wordlist.indexOf(word.toLowerCase());

    if (index < 0) {
      throw new Error(`Word not found in wordlist: ${word}`);
    }

    for (let i = 0; i < 11; i += 1) {
      concatBits[wordIndex * 11 + i] = (index & 1 << 10 - i) !== 0;
    }
  }

  const checksumBitsLen = concatBitsLen / 33;
  const entropyBitsLen = concatBitsLen - checksumBitsLen;
  const entropy = new Uint8Array(entropyBitsLen / 8);

  for (let i = 0; i < entropy.length; i += 1) {
    for (let j = 0; j < 8; j += 1) {
      if (concatBits[i * 8 + j]) {
        entropy[i] |= 1 << 7 - j;
      }
    }
  } // Checksum validation


  const hash = await sha256.digest(entropy);
  const hashBits = bytesToBits(hash);

  for (let i = 0; i < checksumBitsLen; i += 1) {
    if (concatBits[entropyBitsLen + i] !== hashBits[i]) {
      throw new Error("Checksum mismatch");
    }
  }

  return entropy;
}
/**
 * @param {Uint8Array} data
 * @returns {number}
 */


function crc8(data) {
  let crc = 0xff;

  for (let i = 0; i < data.length - 1; i += 1) {
    crc ^= data[i];

    for (let j = 0; j < 8; j += 1) {
      crc = crc >>> 1 ^ ((crc & 1) === 0 ? 0 : 0xb2);
    }
  }

  return crc ^ 0xff;
}
/**
 * @param {number[]} nums
 * @param {number} fromRadix
 * @param {number} toRadix
 * @param {number} toLength
 * @returns {Uint8Array}
 */


function convertRadix(nums, fromRadix, toRadix, toLength) {
  let num = new _bignumber.default(0);

  for (const element of nums) {
    num = num.times(fromRadix);
    num = num.plus(element);
  }

  const result = new Uint8Array(toLength);

  for (let i = toLength - 1; i >= 0; i -= 1) {
    const tem = num.dividedToIntegerBy(toRadix);
    const rem = num.modulo(toRadix);
    num = tem;
    result[i] = rem.toNumber();
  }

  return result;
}
/**
 * @param {Uint8Array} data
 * @returns {boolean[]}
 */


function bytesToBits(data) {
  /** @type {boolean[]} */
  const bits = [];
  bits.fill(false, 0, data.length * 8);

  for (let i = 0; i < data.length; i += 1) {
    for (let j = 0; j < 8; j += 1) {
      bits[i * 8 + j] = (data[i] & 1 << 7 - j) !== 0;
    }
  }

  return bits;
}

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