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Web authentication easy public key access

The getAuthenticatorData() method of the AuthenticatorAttestationResponse interface returns an ArrayBuffer containing the authenticator data contained within the AuthenticatorAttestationResponse.attestationObject property.

This is a convenience function, created to allow easy access to the authenticator data without having to write extra parsing code to extract it from the attestationObject.

Auth, Crypto and Security

Browser support

Feature Desktop Mobile
Chrome
Edge
Firefox
Safari
Chrome Android
Safari iOS
getAuthenticatorData
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getPublicKey

The getPublicKey() method of the AuthenticatorAttestationResponse interface returns an ArrayBuffer containing the DER SubjectPublicKeyInfo of the new credential (see Subject Public Key Info), or null if this is not available.
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getPublicKeyAlgorithm

The getPublicKeyAlgorithm() method of the AuthenticatorAttestationResponse interface returns a number that is equal to a COSE Algorithm Identifier, representing the cryptographic algorithm used for the new credential.
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1+Supported (version) Not supported ※Has note Sub-feature descriptions sourced from MDN Web Docs (CC BY-SA 2.5)

Syntax

JAVASCRIPT 
getAuthenticatorData()

Use cases

  • Using Web authentication easy public key access

    The getAuthenticatorData() method of the AuthenticatorAttestationResponse interface returns an ArrayBuffer containing the authenticator data contained within the AuthenticatorAttestationResponse.

Cautions

  • May not be supported in older browsers.

Implementation notes

  • Some APIs require a secure context (HTTPS) or user activation. Check the requirements before use.

Related links