Window.crypto | Web API

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只读 Window.crypto property returns the Crypto object associated to the global object. This object allows web pages access to certain cryptographic related services. Although the property itself is read-only, all of its methods (and the methods of its child object, SubtleCrypto ) are not read-only, and therefore vulnerable to attack by polyfill .

尽管 window.crypto is available on all windows, the returned Crypto object only has one usable feature in insecure contexts: the getRandomValues() method. In general, you should use this API only in secure contexts.

句法

var cryptoObj = window.crypto || window.msCrypto; // for IE 11

值

An instance of the Crypto interface, providing access to general-purpose cryptography and a strong random-number generator.

范例

此范例使用 Window.crypto property to access the getRandomValues() 方法。

JavaScript

genRandomNumbers = function getRandomNumbers() {
  var array = new Uint32Array(10);
  window.crypto.getRandomValues(array);
  var randText = document.getElementById("myRandText");
  randText.innerHTML = "The random numbers are: "
  for (var i = 0; i < array.length; i++) {
    randText.innerHTML += array[i] + " ";
  }
}

HTML

<p id="myRandText">The random numbers are: </p>
<button type="button" onClick='genRandomNumbers()'>Generate 10 random numbers</button>

结果

规范

规范	状态	注释
Web Cryptography API The definition of 'Window.crypto' in that specification.	推荐	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`crypto`	Chrome 37	Edge 12	Firefox 34	IE 11 Prefixed 11 Prefixed Prefixed Implemented with the vendor prefix: ms	Opera 24	Safari 6.1	WebView Android 37	Chrome Android 37	Firefox Android 34	Opera Android 24	Safari iOS 6.1	Samsung Internet Android 3.0

图例

完整支持
要求使用供应商前缀或不同名称。

另请参阅

Window 全局对象
Crypto interface

元数据

最后修改： 2020 年 7 月 29 日

在此页

句法

值

范例

JavaScript

HTML

结果

规范

浏览器兼容性

图例

另请参阅

相关话题