AuthenticatorAssertionResponse

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Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The AuthenticatorAssertionResponse interface of the Web Authentication API is returned by CredentialsContainer.get() when a PublicKeyCredential is passed, and provides proof to a service that it has a key pair and that the authentication request is valid and approved.

This interface inherites from AuthenticatorResponse.

Note: This interface is restricted to top-level contexts. Use from within an <iframe> element will not have any effect.

Properties

AuthenticatorAssertionResponse.clientDataJSON Secure contextRead only
The client data for the authentication, such as origin and challenge. The clientDataJSON property is inherited from the AuthenticatorResponse.
AuthenticatorAssertionResponse.authenticatorData Secure contextRead only
An ArrayBuffer containing information from the authenticator such as the Relying Party ID Hash (rpIdHash), a signature counter, test of user presence and user verification flags, and any extensions processed by the authenticator.
AuthenticatorAssertionResponse.signature Secure contextRead only
An assertion signature over AuthenticatorAssertionResponse.authenticatorData and AuthenticatorResponse.clientDataJSON. The assertion signature is created with the private key of keypair that was created during the navigator.credentials.create() call and verified using the public key of that same keypair.
AuthenticatorAssertionResponse.userHandle Secure contextRead only
An ArrayBuffer containing an opaque user identifier.

Methods

None.

Examples

var options = {
  challenge: new Uint8Array([/* bytes sent from the server */])
};

navigator.credentials.get({ "publicKey": options })
    .then(function (credentialInfoAssertion) {
    var assertionResponse = credentialInfoAssertion.response;
    // Do something specific with the response

    // send assertion response back to the server
    // to proceed with the control of the credential
}).catch(function (err) {
     console.error(err);
});

Specifications

Specification Status Comment
Web Authentication: An API for accessing Public Key Credentials Level 1
The definition of 'AuthenticatorAssertionResponse interface' in that specification.
Candidate Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
AuthenticatorAssertionResponseChrome Full support 67
Full support 67
Full support 65
Notes Disabled
Notes Only supports USB U2F tokens.
Disabled From version 65: this feature is behind the Web Authentication API preference (needs to be set to Enabled). To change preferences in Chrome, visit chrome://flags.
Edge Full support 18Firefox Full support 60
Notes
Full support 60
Notes
Notes Only supports USB U2F tokens.
IE No support NoOpera No support NoSafari No support NoWebView Android Full support 70Chrome Android Full support 70Firefox Android Full support 60
Notes
Full support 60
Notes
Notes Only supports USB U2F tokens.
Opera Android No support NoSafari iOS No support NoSamsung Internet Android ?
authenticatorDataChrome Full support 67
Full support 67
Full support 65
Notes Disabled
Notes Only supports USB U2F tokens.
Disabled From version 65: this feature is behind the Web Authentication API preference (needs to be set to Enabled). To change preferences in Chrome, visit chrome://flags.
Edge Full support 18Firefox Full support 60
Notes
Full support 60
Notes
Notes Only supports USB U2F tokens.
IE No support NoOpera No support NoSafari No support NoWebView Android Full support 70Chrome Android Full support 70Firefox Android Full support 60
Notes
Full support 60
Notes
Notes Only supports USB U2F tokens.
Opera Android No support NoSafari iOS No support NoSamsung Internet Android ?
signatureChrome Full support 67
Full support 67
Full support 65
Notes Disabled
Notes Only supports USB U2F tokens.
Disabled From version 65: this feature is behind the Web Authentication API preference (needs to be set to Enabled). To change preferences in Chrome, visit chrome://flags.
Edge Full support 18Firefox Full support 60
Notes
Full support 60
Notes
Notes Only supports USB U2F tokens.
IE No support NoOpera No support NoSafari No support NoWebView Android Full support 70Chrome Android Full support 70Firefox Android Full support 60
Notes
Full support 60
Notes
Notes Only supports USB U2F tokens.
Opera Android No support NoSafari iOS No support NoSamsung Internet Android ?
userHandleChrome Full support 67
Full support 67
Full support 65
Notes Disabled
Notes Only supports USB U2F tokens.
Disabled From version 65: this feature is behind the Web Authentication API preference (needs to be set to Enabled). To change preferences in Chrome, visit chrome://flags.
Edge Full support 18Firefox Full support 60
Notes
Full support 60
Notes
Notes Only supports USB U2F tokens.
IE No support NoOpera No support NoSafari No support NoWebView Android Full support 70Chrome Android Full support 70Firefox Android Full support 60
Notes
Full support 60
Notes
Notes Only supports USB U2F tokens.
Opera Android No support NoSafari iOS No support NoSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
See implementation notes.
See implementation notes.
User must explicitly enable this feature.
User must explicitly enable this feature.

See also