AuthenticatorAssertionResponse.signature
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The signature read-only property of the
AuthenticatorAssertionResponse interface is an ArrayBuffer
object which is the signature of the authenticator for both
AuthenticatorAssertionResponse.authenticatorData and a SHA-256 hash of
the client data
(AuthenticatorAssertionResponse.clientDataJSON).
This signature will be sent to the server for control, as part of the response. It provides the proof that an authenticator does possess the private key which was used for the credential's generation.
Note: An AuthenticatorAssertionResponse instance is
available on PublicKeyCredential.response after calling
navigator.credentials.get().
Note: This property may only be used in top-level contexts and will
not be available in an <iframe> for example.
Value
An ArrayBuffer object which the signature of the authenticator (using its
private key) for both AuthenticatorAssertionResponse.authenticatorData
and a SHA-256 hash given by the client for its data (the challenge, the origin, etc. and
available from
AuthenticatorAssertionResponse.clientDataJSON).
Examples
var options = {
challenge: new Uint8Array(26), // will be another value, provided by the relying party server
timeout: 60000
};
navigator.credentials.get({ publicKey: options })
.then(function (assertionPKCred) {
var signature = assertionPKCred.response.signature;
// Send response and client extensions to the server so that it can
// go on with the authentication
}).catch(function (err) {
console.error(err);
});
Specifications
| Specification |
|---|
| Web Authentication: An API for accessing Public Key Credentials - Level 3 # dom-authenticatorassertionresponse-signature |
Browser compatibility
BCD tables only load in the browser