webauthn::WebAuthn method verify_es256_assertion (protected)

 <instance of webauthn::WebAuthn> verify_es256_assertion \
    [ -cose cose ] [ -sig sig ] [ -signedData signedData ]

Defined in packages/webauthn/tcl/webauthn-procs.tcl

Verify a WebAuthn assertion signature for an ES256 credential. Expects an EC2 / P-256 COSE key and verifies the signature over signedData using ECDSA with SHA-256.

Switches:

-cose (optional)

Parsed COSE_Key dict.

-sig (optional)

Signature returned by the authenticator.

-signedData (optional)

Binary signed data (authenticatorData || hash(clientDataJSON)).

Testcases:

No testcase defined.