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Registration and authentication ceremonies, driven without a browser
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Spring Security 7.1.1, Spring Boot 4.1.1, rpId localhost, default settings.
The authenticator is src/main/java/com/ankurm/passkeys/virtual/VirtualAuthenticator.java.

=== Registration ceremony, then authentication ceremony, no browser involved ===
POST /login (password) -> HTTP 302, Location: http://localhost:8080/

$ POST /webauthn/register/options
HTTP 200
{"attestation":"none","authenticatorSelection":{"residentKey":"required","userVerification":"preferred"},"challenge":"cfccFSLkLYqwn_qsRIDEpAa8fUnVtxkAB82NBijQyyA","excludeCredentials":[],"extensions":{"credProps":true},"pubKeyCredParams":[{"alg":-8,"type":"public-key"},{"alg":-7,"type":"public-key"},{"alg":-257,"type":"public-key"}],"rp":{"id":"localhost","name":"ankurm passkeys demo"},"timeout":300000,"user":{"name":"user","id":"qJBkbDbHGSVdnYG0VqD0JAN-t7GAejJ3Lw3HDL9bKow","displayName":"user"}}
authenticator produced credentialId lAfNKiLC_virGa8Yrfr4gA and a 178-byte CBOR attestation object

$ POST /webauthn/register
HTTP 200
{"success":true}

$ GET /diag/credentials
HTTP 200
{"principal":"user","principalType":"UsernamePasswordAuthenticationToken","authorities":["FactorGrantedAuthority [authority=FACTOR_PASSWORD, issuedAt=2026-08-25T17:18:48.132461443Z]","ROLE_USER"],"userEntity":{"displayName":"user","name":"user","id":"qJBkbDbHGSVdnYG0VqD0JAN-t7GAejJ3Lw3HDL9bKow"},"credentials":[{"label":"yubikey-on-my-desk","credentialId":"lAfNKiLC_virGa8Yrfr4gA","signatureCount":0,"uvInitialized":true,"backupEligible":true,"backupState":true,"transports":["hybrid","internal"],"attestationObjectBytes":178,"created":"2026-08-25T17:18:48.764625858Z","lastUsed":"2026-08-25T17:18:48.764625858Z"}]}
logged out, cookie jar emptied

=== Session dropped. Authenticating with the passkey alone ===

$ POST /webauthn/authenticate/options
HTTP 200
{"allowCredentials":[],"challenge":"BUu8TaKJn6f43nZk4oL3GpD517F8cDol5XOlc7GULq8","extensions":{},"rpId":"localhost","timeout":300000,"userVerification":"preferred"}

$ POST /login/webauthn
HTTP 200
{"authenticated":true,"redirectUrl":"/"}

$ GET /me
HTTP 200
{"name":"user","authenticationType":"WebAuthnAuthentication","authorities":["FactorGrantedAuthority [authority=FACTOR_WEBAUTHN, issuedAt=2026-08-25T17:18:49.046877669Z]","ROLE_USER"]}