exonum-client-cis/lib/crypto/gost.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.SIGNATURE_LENGTH = exports.HASH_LENGTH = exports.SECRET_KEY_LENGTH = exports.PUBLIC_KEY_LENGTH = void 0;

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

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

var _exonumWebcryptoGost = _interopRequireWildcard(require("../third-party/exonum-webcrypto-gost"));

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

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

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

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

var PUBLIC_KEY_LENGTH = 64;
exports.PUBLIC_KEY_LENGTH = PUBLIC_KEY_LENGTH;
var SECRET_KEY_LENGTH = 32;
exports.SECRET_KEY_LENGTH = SECRET_KEY_LENGTH;
var HASH_LENGTH = 32;
exports.HASH_LENGTH = HASH_LENGTH;
var SIGNATURE_LENGTH = 64;
/**
 * Get GOST R 34.11 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.SIGNATURE_LENGTH = SIGNATURE_LENGTH;

function hash(data, type) {
  var buffer;
  var hasher = new _exonumWebcryptoGost.GostDigest({
    name: 'GOST R 34.11',
    version: 2012
  });
  var digest;

  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);
    var merged = new Uint8Array(chainIdBytesBuffer.length + payloadBuffer.length + authorBuffer.length);
    merged.set(chainIdBytesBuffer);
    merged.set(payloadBuffer, chainIdBytesBuffer.length);
    merged.set(authorBuffer, chainIdBytesBuffer.length + payloadBuffer.length);
    buffer = merged;
  } 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);
    }
  }

  digest = hasher.digest(new Uint8Array(buffer));
  return convert.uint8ArrayToHexadecimal(new Uint8Array(digest));
}
/**
 * Get GOST R 34.10 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 coding = new _exonumWebcryptoGost.GostCoding();
  var buffer;

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

  if ((0, _generic.isType)(type)) {
    buffer = new Uint8Array(type.serialize(data));
  } else if ((0, _message.isTransaction)(type)) {
    var ser = new Uint8Array(type.serialize(data));
    var chainIdBytesBuffer = new Uint8Array(type.chain_id_bytes);
    buffer = new Uint8Array(chainIdBytesBuffer.length + ser.length);
    buffer.set(chainIdBytesBuffer);
    buffer.set(ser, chainIdBytesBuffer.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);
    }
  }

  var secretKeyBuf = coding.Hex.decode(secretKey);
  return _exonumWebcryptoGost["default"].subtle.importKey('raw', secretKeyBuf, {
    id: 'id-tc26-gost3410-12-256',
    keySize: 32,
    length: 256,
    mode: 'SIGN',
    name: 'GOST R 34.10',
    namedCurve: 'S-256-A',
    procreator: 'CP',
    version: 2012
  }, false, ['sign']).then(function (key) {
    return _exonumWebcryptoGost["default"].subtle.sign('GOST R 34.10/GOST R 34.11', key, buffer);
  }).then(function (signature) {
    return coding.Hex.encode(signature, 'big').split(/[^0-9a-f]+/).join('');
  });
}
/**
 * Verifies GOST R 34.10 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 buffer;

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

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

  if ((0, _generic.isType)(type)) {
    buffer = new Uint8Array(type.serialize(data));
  } else if ((0, _message.isTransaction)(type)) {
    var ser = new Uint8Array(type.serialize(data));
    var chainIdBytesBuffer = new Uint8Array(type.chain_id_bytes);
    buffer = new Uint8Array(chainIdBytesBuffer.length + ser.length);
    buffer.set(chainIdBytesBuffer);
    buffer.set(ser, chainIdBytesBuffer.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.');
  }

  var signatureBuf = _exonumWebcryptoGost["default"].coding.Hex.decode(signature, 'big');

  var publicKeyBuf = _exonumWebcryptoGost["default"].coding.Hex.decode(publicKey);

  return _exonumWebcryptoGost["default"].subtle.importKey('raw', publicKeyBuf, {
    name: 'GOST R 34.10-256/VN',
    id: 'id-tc26-gost3410-12-256',
    namedCurve: 'S-256-A'
  }, true, ['verify']).then(function (key) {
    return _exonumWebcryptoGost["default"].subtle.verify('GOST R 34.10/GOST R 34.11', key, signatureBuf, new Uint8Array(buffer));
  });
}
/**
 * Generate random pair of publicKey and secretKey
 * @return {Promise<Object>}
 *  publicKey {string}
 *  secretKey {string}
 */


function keyPair() {
  return _exonumWebcryptoGost["default"].subtle.generateKey({
    name: 'GOST R 34.10-256/VN'
  }, true, ['sign', 'verify']).then(function (pair) {
    return {
      publicKey: convert.uint8ArrayToHexadecimal(new Uint8Array(pair.publicKey.buffer)),
      secretKey: convert.uint8ArrayToHexadecimal(new Uint8Array(pair.privateKey.buffer))
    };
  });
}
/**
 * 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 = _exonumWebcryptoGost["default"].subtle.generateKey(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();
}