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• 句法
• 特性
• 范例
• 规范
• 浏览器兼容性
• 相关话题

安全上下文
此特征只可用于 安全上下文 (HTTPS)，在某些或所有 支持浏览器 .

clientDataJSON 特性为 AuthenticatorResponse interface stores a JSON string in an ArrayBuffer , representing the client data that was passed to CredentialsContainer.create() or CredentialsContainer.get() . This property is only accessed on one of the child objects of AuthenticatorResponse , specifically AuthenticatorAttestationResponse or AuthenticatorAssertionResponse .

句法

var arrayBuffer = AuthenticatorAttestationResponse.clientDataJSON;
var arrayBuffer = AuthenticatorAssertionResponse.clientDataJSON;
					

值

ArrayBuffer .

特性

之后 clientDataJSON object is converted from an ArrayBuffer to a JavaScript object, it will have the following properties:

type

A string which is either "webauthn.get" when an existing credential is retrieved or "webauthn.create" when a new credential is created.

challenge

base64url encoded version of the cryptographic challenge sent from the relying party's server. The original value is passed via PublicKeyCredentialRequestOptions.challenge or PublicKeyCredentialCreationOptions.challenge .

origin

The fully qualified origin of the requester which has been given by the client/browser to the authenticator. We should expect the relying party's id to be a suffix of this value.

tokenBindingId 可选

An object describing the state of the token binding protocol for the communication with the relying party. It has two properties:

• status : A string which is either "supported" which indicates the client support token binding but did not negotiate with the relying party or "present" when token binding was used already
• id : A DOMString which is the base64url encoding of the token binding ID which was used for the communication.

Should this property be absent, it would indicate that the client does not support token binding.

范例

function arrayBufferToStr(buf) {
    return String.fromCharCode.apply(null, new Uint8Array(buf));
}
// pk is a PublicKeyCredential that is the result of a create() or get() Promise
var clientDataStr = arrayBufferToStr(pk.clientDataJSON);
var clientDataObj = JSON.parse(clientDataStr);
console.log(clientDataObj.type);      // "webauthn.create" or "webauthn.get"
console.log(clientDataObj.challenge); // base64 encoded String containing the original challenge
console.log(clientDataObj.origin);    // the window.origin
					

规范

规范	状态	注释
Web Authentication: An API for accessing Public Key Credentials Level 1 The definition of 'clientDataJSON' 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
clientDataJSON	Chrome 67 67 65 Disabled Only supports USB U2F tokens. Disabled ). To change preferences in Chrome, visit	Edge 18	Firefox 60 60 Only supports USB U2F tokens.	IE No	Opera No	Safari 13	WebView Android 70	Chrome Android 70	Firefox Android 60 60 Only supports USB U2F tokens.	Opera Android No	Safari iOS 13.3	Samsung Internet Android No

图例

完整支持

完整支持

不支持

不支持

见实现注意事项。

用户必须明确启用此特征。

用户必须明确启用此特征。

元数据

• 最后修改： Mar 18, 2019

相关话题

1. Web 身份验证 API
2. AuthenticatorResponse
3. 特性

   1. clientDataJSON
4. Related pages for Web Authentication API

   1. AuthenticatorAssertionResponse
   2. AuthenticatorAttestationResponse
   3. CredentialsContainer
   4. PublicKeyCredential