contingent/dist/contingent.js

Create cryptographically-strong random numbers in node.js or the browser

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		module.exports = factory();
	else if(typeof define === 'function' && define.amd)
		define([], factory);
	else if(typeof exports === 'object')
		exports["contingent"] = factory();
	else
		root["contingent"] = factory();
})(window, function() {
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/* 0 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var __importDefault = this && this.__importDefault || function (mod) {
  return mod && mod.__esModule ? mod : {
    "default": mod
  };
};

Object.defineProperty(exports, "__esModule", {
  value: true
});

var core_1 = __webpack_require__(3);

var browser_lib_1 = __importDefault(__webpack_require__(4));

var _core_1$core = core_1.core(browser_lib_1["default"]),
    _randomBytes = _core_1$core.randomBytes,
    randomBit = _core_1$core.randomBit,
    randomByte = _core_1$core.randomByte,
    randomInt = _core_1$core.randomInt,
    randomUInt = _core_1$core.randomUInt,
    randomFloat = _core_1$core.randomFloat,
    randomIn = _core_1$core.randomIn,
    randomOf = _core_1$core.randomOf,
    roll = _core_1$core.roll,
    shuffle = _core_1$core.shuffle,
    pick = _core_1$core.pick,
    select = _core_1$core.select,
    replace = _core_1$core.replace,
    generate = _core_1$core.generate;

exports.randomBit = randomBit;
exports.randomByte = randomByte;
exports.randomInt = randomInt;
exports.randomUInt = randomUInt;
exports.randomFloat = randomFloat;
exports.randomIn = randomIn;
exports.randomOf = randomOf;
exports.roll = roll;
exports.shuffle = shuffle;
exports.pick = pick;
exports.select = select;
exports.replace = replace;
exports.generate = generate;

function randomBytes(n) {
  return _randomBytes(n);
}

exports.randomBytes = randomBytes;
exports["default"] = {
  randomBytes: randomBytes,
  randomBit: randomBit,
  randomByte: randomByte,
  randomInt: randomInt,
  randomUInt: randomUInt,
  randomFloat: randomFloat,
  randomIn: randomIn,
  randomOf: randomOf,
  roll: roll,
  shuffle: shuffle,
  pick: pick,
  select: select,
  replace: replace,
  generate: generate
};

/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});

function swap(list, a, b) {
  var temp = list[a];
  list[a] = list[b];
  list[b] = temp;
  return list;
}

exports.swap = swap;

function toArray(obj) {
  if (obj instanceof DataView) {
    return Array.from(new Uint8Array(obj.buffer));
  }

  return Array.from(obj);
}

exports.toArray = toArray;

/***/ }),
/* 2 */
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
__webpack_require__.r(__webpack_exports__);
/* harmony import */ var _lib_browser__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(0);
/* harmony import */ var _lib_browser__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_lib_browser__WEBPACK_IMPORTED_MODULE_0__);
/* harmony reexport (default from non-harmony) */ __webpack_require__.d(__webpack_exports__, "contingent", function() { return _lib_browser__WEBPACK_IMPORTED_MODULE_0___default.a; });
/* harmony import */ var _lib_utils__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(1);
/* harmony import */ var _lib_utils__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(_lib_utils__WEBPACK_IMPORTED_MODULE_1__);


_lib_browser__WEBPACK_IMPORTED_MODULE_0___default.a.toArray = _lib_utils__WEBPACK_IMPORTED_MODULE_1__["toArray"];


/***/ }),
/* 3 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});

var utils_1 = __webpack_require__(1);

function _randomBytes(crypto, n) {
  return crypto.randomBytes(n);
}

function _randomBit(crypto) {
  return crypto.randomBit();
}

function _randomByte(crypto) {
  return crypto.randomByte();
}

function _randomInt(crypto) {
  return crypto.randomInt();
}

function _randomUInt(crypto) {
  return crypto.randomUint();
}

function _randomFloat(crypto) {
  return crypto.randomUint() / Math.pow(2, 32);
}

function _randomIn(crypto, min, max) {
  if (max < min) {
    throw new Error('max should be >= min');
  }

  return min + Math.floor((max - min) * _randomFloat(crypto));
}

function _randomOf(crypto, list) {
  return list[_randomIn(crypto, 0, list.length)];
}

function _roll(crypto, n) {
  if (n <= 0) {
    throw new Error('<roll> sides should be >= 1');
  }

  return _randomIn(crypto, 1, n + 1);
}

function _shuffle(crypto, list) {
  for (var i = 0; i < list.length; i++) {
    var elem = _randomIn(crypto, i, list.length);

    utils_1.swap(list, i, elem);
  }

  return list;
}

function _pick(crypto, n, list) {
  if (n < 0 || n > list.length) {
    throw new Error("num should be in the range [0, ".concat(list.length, "]"));
  }

  var copy = _shuffle(crypto, list.slice());

  return copy.slice(-n);
}

function _select(crypto, n, list) {
  if (n < 0 || n > list.length) {
    throw new Error("num should be in the range [0, ".concat(list.length, "]"));
  }

  var indexes = [];
  var len = list.length;

  for (var i = 0; i < n; i++) {
    indexes.push(_randomIn(crypto, 0, len));
  }

  return indexes.map(function (i) {
    return list[i];
  });
}

function _replace(crypto, list, value) {
  var elem = _randomIn(crypto, 0, list.length);

  list[elem] = value;
  return list;
}

function _generate(len, create) {
  return new Array(len).fill(0).map(function () {
    return create();
  });
}

function core(crypto) {
  return {
    randomBytes: function randomBytes(n) {
      return _randomBytes(crypto, n);
    },
    randomBit: function randomBit() {
      return _randomBit(crypto);
    },
    randomByte: function randomByte() {
      return _randomByte(crypto);
    },
    randomInt: function randomInt() {
      return _randomInt(crypto);
    },
    randomUInt: function randomUInt() {
      return _randomUInt(crypto);
    },
    randomFloat: function randomFloat() {
      return _randomFloat(crypto);
    },
    randomIn: function randomIn(min, max) {
      return _randomIn(crypto, min, max);
    },
    randomOf: function randomOf(list) {
      return _randomOf(crypto, list);
    },
    roll: function roll(n) {
      return _roll(crypto, n);
    },
    shuffle: function shuffle(list) {
      return _shuffle(crypto, list);
    },
    pick: function pick(n, list) {
      return _pick(crypto, n, list);
    },
    select: function select(n, list) {
      return _select(crypto, n, list);
    },
    replace: function replace(list, value) {
      return _replace(crypto, list, value);
    },
    generate: function generate(len, create) {
      return _generate(len, create);
    }
  };
}

exports.core = core;

/***/ }),
/* 4 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});

function randomBytes(n) {
  var crypto = window.crypto || window.msCrypto;

  if (crypto == null) {
    throw new Error('crypto not found for randomBytes');
  }

  var uint8 = crypto.getRandomValues(new Uint8Array(n));
  return new DataView(uint8.buffer);
}

exports.randomBytes = randomBytes;

function randomBit() {
  return randomBytes(1).getUint8(0) % 2 === 0;
}

exports.randomBit = randomBit;

function randomByte() {
  return randomBytes(1).getUint8(0);
}

exports.randomByte = randomByte;

function randomInt() {
  return randomBytes(4).getInt32(0);
}

exports.randomInt = randomInt;

function randomUint() {
  return randomBytes(4).getUint32(0);
}

exports.randomUint = randomUint;
exports["default"] = {
  randomBytes: randomBytes,
  randomBit: randomBit,
  randomByte: randomByte,
  randomInt: randomInt,
  randomUint: randomUint
};

/***/ })
/******/ ])["contingent"];
});