Implement Passkey authentication

2026-02-18 11:24:10 +01:00
parent 70c19e4881
commit da69039476
18 changed files with 368 additions and 78 deletions
@@ -0,0 +1,54 @@
+class Sessions::PasskeysController < ApplicationController
+  disallow_account_scope
+  require_unauthenticated_access
+  rate_limit to: 10, within: 3.minutes, only: :create, with: :rate_limit_exceeded
+
+  def create
+    credential = Identity::Credential.authenticate(
+      id: params.expect(:credential_id),
+      client_data_json: response_params[:client_data_json],
+      authenticator_data: response_params[:authenticator_data],
+      signature: response_params[:signature],
+      challenge: session.delete(:webauthn_challenge),
+      origin: request.base_url
+    )
+
+    if credential
+      authentication_succeeded(credential.identity)
+    else
+      authentication_failed
+    end
+  end
+
+  private
+    def response_params
+      params.expect(response: [ :client_data_json, :authenticator_data, :signature ])
+    end
+
+    def authentication_succeeded(identity)
+      start_new_session_for identity
+
+      respond_to do |format|
+        format.html { redirect_to after_authentication_url }
+        format.json { render json: { session_token: session_token } }
+      end
+    end
+
+    def authentication_failed
+      alert_message = "That passkey didn't work. Try again."
+
+      respond_to do |format|
+        format.html { redirect_to new_session_path, alert: alert_message }
+        format.json { render json: { message: alert_message }, status: :unauthorized }
+      end
+    end
+
+    def rate_limit_exceeded
+      rate_limit_exceeded_message = "Try again later."
+
+      respond_to do |format|
+        format.html { redirect_to new_session_path, alert: rate_limit_exceeded_message }
+        format.json { render json: { message: rate_limit_exceeded_message }, status: :too_many_requests }
+      end
+    end
+end