AuthenticatorAssertionResponse: signature property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.
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.
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
See Retrieving a public key credential for a detailed example.
Specifications
| Specification |
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| Web Authentication: An API for accessing Public Key Credentials - Level 3 # dom-authenticatorassertionresponse-signature |
Browser compatibility
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Legend
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- See implementation notes.
- Has more compatibility info.