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/** |
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* @license |
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* Copyright (c) 2020 UMI |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included in all |
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* copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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'use strict' |
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const array = require('../../util/array.js') |
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const index = require('../../util/ed25519/index.js') |
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const PublicKey = require('./PublicKey.js') |
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const sha256 = require('../../util/sha256.js') |
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/** |
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* Класс для работы с приватными ключами. |
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* @class |
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*/ |
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class SecretKey { |
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/** |
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* @param {ArrayLike<number>} bytes Приватный ключ в бинарном виде. |
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* В формате libsodium, 64 байта. |
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* @throws {Error} |
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* @example |
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* let bytes = SecretKey.fromSeed(new Uint8Array(32)).getBytes() |
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* let secKey = new SecretKey(bytes) |
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*/ |
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constructor (bytes) { |
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/** |
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* Приватный ключ в бинарном виде. В формате libsodium. |
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* @type {number[]} |
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* @private |
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*/ |
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this._bytes = [] |
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if (bytes.length !== 64) { |
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throw new Error('invalid length') |
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} |
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array.arraySet(this._bytes, bytes) |
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} |
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/** |
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* Статический метод, создающий приватный ключ из seed.\ |
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* Libsodium принимает seed длиной 32 байта, поэтому если длина |
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* отличается, то берется sha256 хэш. |
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* @param {ArrayLike<number>} seed Массив байтов любой длины. |
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* @returns {SecretKey} |
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* @example |
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* let seed = new Uint8Array(32) |
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* let secKey = SecretKey.fromSeed(seed) |
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*/ |
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static fromSeed (seed) { |
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let entropy = seed |
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if (seed.length !== 32) { |
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entropy = sha256.sha256(entropy) |
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} |
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return new SecretKey(index.secretKeyFromSeed(entropy)) |
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} |
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/** |
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* Приватный ключ в бинарном виде. В формате libsodium, 64 байта. |
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* @returns {number[]} |
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* @example |
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* let secKey = SecretKey.fromSeed(new Uint8Array(32)) |
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* let bytes = secKey.getBytes() |
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*/ |
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getBytes () { |
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return this._bytes.slice(0) |
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} |
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/** |
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* Публичный ключ, соответствующий приватному ключу. |
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* @returns {PublicKey} |
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* @example |
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* let secKey = SecretKey.fromSeed(new Uint8Array(32)) |
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* let pubKey = secKey.getPublicKey() |
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*/ |
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getPublicKey () { |
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return new PublicKey.PublicKey(this._bytes.slice(32, 64)) |
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} |
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/** |
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* Создает цифровую подпись сообщения. |
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* @param {ArrayLike<number>} message Сообщение, которое необходимо подписать. |
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* @returns {number[]} Подпись длиной 64 байта. |
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* @example |
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* let secKey = SecretKey.fromSeed(new Uint8Array(32)) |
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* let message = new TextEncoder().encode('Hello World') |
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* let signature = secKey.sign(message) |
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*/ |
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sign (message) { |
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return index.sign(message, this._bytes) |
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} |
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} |
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exports.SecretKey = SecretKey |
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umi-top /
umi-core-js
