exonum-client-cis/lib/crypto/nist.js

Light Client for Exonum CIS Blockchain

"use strict";

var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard");

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.hash = hash;
exports.sign = sign;
exports.verifySignature = verifySignature;
exports.keyPair = keyPair;
exports.fromSeed = fromSeed;
exports.randomUint64 = randomUint64;
exports.SECRET_KEY_LENGTH = exports.HASH_LENGTH = void 0;

var _bigInteger = _interopRequireDefault(require("big-integer"));

var _sha = _interopRequireDefault(require("sha.js"));

var _tweetnacl = _interopRequireDefault(require("tweetnacl"));

var _generic = require("../types/generic");

var _message = require("../types/message");

var validate = _interopRequireWildcard(require("../types/validate"));

var convert = _interopRequireWildcard(require("../types/convert"));

/**
 * Byte size of a hash.
 * @type {number}
 */
var HASH_LENGTH = 32;
exports.HASH_LENGTH = HASH_LENGTH;
var SECRET_KEY_LENGTH = 64;
/**
 * Get SHA256 hash
 * @param {Object|Array|Uint8Array} data - object of NewType type or array of 8-bit integers
 * @param {Type|Transaction} [type] - optional, used only if data of {Object} type is passed
 * @return {string}
 */

exports.SECRET_KEY_LENGTH = SECRET_KEY_LENGTH;

function hash(data, type) {
  var buffer;

  if ((0, _generic.isType)(type)) {
    buffer = type.serialize(data);
  } else if ((0, _message.isTransaction)(type)) {
    var payloadBuffer = data.schema.encode(data.payload).finish();
    var chainIdBytesBuffer = data.chainIdBytes;
    var authorBuffer = convert.hexadecimalToUint8Array(data.author);
    return (0, _sha["default"])('sha256').update(chainIdBytesBuffer).update(payloadBuffer).update(authorBuffer).digest('hex');
  } else {
    if (type !== undefined) {
      throw new TypeError('Wrong type of data.');
    }

    if (data instanceof Uint8Array) {
      buffer = data;
    } else {
      if (!Array.isArray(data)) {
        throw new TypeError('Invalid data parameter.');
      }

      buffer = new Uint8Array(data);
    }
  }

  return (0, _sha["default"])('sha256').update(buffer, 'utf8').digest('hex');
}
/**
 * Get ED25519 signature
 * @param {string} secretKey
 * @param {Object|Array} data - object of NewType type or array of 8-bit integers
 * @param {Type|Transaction} [type] - optional, used only if data of {Object} type is passed
 * @return {Promise<string>}
 */


function sign(secretKey, data, type) {
  var secretKeyUint8Array;
  var buffer;
  var signature;

  if (!validate.validateHexadecimal(secretKey, 64)) {
    throw new TypeError('secretKey of wrong type is passed. Hexadecimal expected.');
  }

  secretKeyUint8Array = convert.hexadecimalToUint8Array(secretKey);

  if ((0, _generic.isType)(type)) {
    buffer = new Uint8Array(type.serialize(data));
  } else if ((0, _message.isTransaction)(type)) {
    var chainIdBuffer = new Uint8Array(type.chain_id_bytes);
    var dataBuffer = new Uint8Array(type.serialize(data));
    buffer = new Uint8Array(chainIdBuffer.length + dataBuffer.length);
    buffer.set(chainIdBuffer);
    buffer.set(dataBuffer, chainIdBuffer.length);
  } else {
    if (type !== undefined) {
      throw new TypeError('Wrong type of data.');
    }

    if (data instanceof Uint8Array) {
      buffer = data;
    } else {
      if (!Array.isArray(data)) {
        throw new TypeError('Invalid data parameter.');
      }

      buffer = new Uint8Array(data);
    }
  }

  signature = _tweetnacl["default"].sign.detached(buffer, secretKeyUint8Array);
  return new Promise(function (resolve) {
    return resolve(convert.uint8ArrayToHexadecimal(signature));
  });
}
/**
 * Verifies ED25519 signature
 * @param {string} signature
 * @param {string} publicKey
 * @param {Object|Array} data - object of NewType type or array of 8-bit integers
 * @param {Type|Transaction} [type] - optional, used only if data of {Object} type is passed
 * @return {Promise<boolean>}
 */


function verifySignature(signature, publicKey, data, type) {
  var signatureUint8Array;
  var publicKeyUint8Array;
  var buffer;

  if (!validate.validateHexadecimal(signature, 64)) {
    throw new TypeError('Signature of wrong type is passed. Hexadecimal expected.');
  }

  signatureUint8Array = convert.hexadecimalToUint8Array(signature);

  if (!validate.validateHexadecimal(publicKey)) {
    throw new TypeError('publicKey of wrong type is passed. Hexadecimal expected.');
  }

  publicKeyUint8Array = convert.hexadecimalToUint8Array(publicKey);

  if ((0, _generic.isType)(type)) {
    buffer = new Uint8Array(type.serialize(data));
  } else if ((0, _message.isTransaction)(type)) {
    var chainIdBuffer = (0, _message.chainIdToBytes)(type.chainId);
    var dataBuffer = new Uint8Array(type.serialize(data));
    buffer = new Uint8Array(chainIdBuffer.length + dataBuffer.length);
    buffer.set(chainIdBuffer);
    buffer.set(dataBuffer, chainIdBuffer.length);
  } else if (type === undefined) {
    if (data instanceof Uint8Array) {
      buffer = data;
    } else if (Array.isArray(data)) {
      buffer = new Uint8Array(data);
    }
  } else {
    throw new TypeError('Wrong type of data.');
  }

  return new Promise(function (resolve) {
    return resolve(_tweetnacl["default"].sign.detached.verify(buffer, signatureUint8Array, publicKeyUint8Array));
  });
}
/**
 * Generate random pair of publicKey and secretKey
 * @return {Object}
 *  publicKey {string}
 *  secretKey {string}
 */


function keyPair() {
  var pair = _tweetnacl["default"].sign.keyPair();

  var publicKey = convert.uint8ArrayToHexadecimal(pair.publicKey);
  var secretKey = convert.uint8ArrayToHexadecimal(pair.secretKey);
  return new Promise(function (resolve) {
    return resolve({
      publicKey: publicKey,
      secretKey: secretKey
    });
  });
}
/**
 * Returns a new signing key pair generated deterministically from a 32-byte seed
 * @return {Object}
 *  publicKey {string}
 *  secretKey {Promise<string>}
 */


function fromSeed(seed) {
  var pair = _tweetnacl["default"].sign.keyPair.fromSeed(seed);

  var publicKey = convert.uint8ArrayToHexadecimal(pair.publicKey);
  var secretKey = convert.uint8ArrayToHexadecimal(pair.secretKey);
  return new Promise(function (resolve) {
    return resolve({
      publicKey: publicKey,
      secretKey: secretKey
    });
  });
}
/**
 * Get random number of cryptographic quality
 * @returns {string}
 */


function randomUint64() {
  var buffer = _tweetnacl["default"].randomBytes(8);

  return _bigInteger["default"].fromArray(Array.from(buffer), 256).toString();
}