react-native-quick-crypto/lib/commonjs/utils/timingSafeEqual.js

A fast implementation of Node's `crypto` module written in C/C++ JSI

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.timingSafeEqual = timingSafeEqual;
var _reactNativeNitroModules = require("react-native-nitro-modules");
var _conversion = require("./conversion");
let utils;
function getNative() {
  if (utils == null) {
    utils = _reactNativeNitroModules.NitroModules.createHybridObject('Utils');
  }
  return utils;
}
function timingSafeEqual(a, b) {
  // Use binaryLikeToArrayBuffer (not abvToArrayBuffer) so that TypedArray /
  // Buffer views are sliced to their `byteOffset`/`byteLength` window. The
  // zero-copy `abvToArrayBuffer` returns the entire backing buffer, which
  // would (a) compare unrelated bytes and (b) silently fail the byte-length
  // check for any view smaller than its backing.
  const bufA = (0, _conversion.binaryLikeToArrayBuffer)(a);
  const bufB = (0, _conversion.binaryLikeToArrayBuffer)(b);
  if (bufA.byteLength !== bufB.byteLength) {
    throw new RangeError('Input buffers must have the same byte length');
  }
  return getNative().timingSafeEqual(bufA, bufB);
}
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