Module: BetterAuth::Passkey::Routes::Authentication

Defined in:
lib/better_auth/passkey/routes/authentication.rb

Class Method Summary collapse

Class Method Details

.generate_passkey_authentication_options_endpoint(config) ⇒ Object 



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# File 'lib/better_auth/passkey/routes/authentication.rb', line 12

def generate_passkey_authentication_options_endpoint(config)
  Endpoint.new(path: "/passkey/generate-authenticate-options", method: "GET", metadata: Routes.openapi_for(:generate_authentication_options)) do |ctx|
    session = BetterAuth::Routes.current_session(ctx, allow_nil: true)
    relying_party = Utils.relying_party(config, ctx)
    passkeys = if session
      ctx.context.adapter.find_many(model: "passkey", where: [{field: "userId", value: session.fetch(:user).fetch("id")}])
    else
      []
    end
    get_options = {
      extensions: Utils.resolve_extensions(config.dig(:authentication, :extensions), ctx),
      relying_party: relying_party
    }
    get_options[:allow] = passkeys.map { |passkey| Credentials.credential_id(passkey) } if passkeys.any?
    options = WebAuthn::Credential.options_for_get(**get_options)
    Challenges.store_challenge(ctx, config, options.challenge, session ? session.fetch(:user).fetch("id") : "")
    payload = options.as_json.merge(userVerification: "preferred")
    payload.delete(:extensions) if payload[:extensions].nil? || payload[:extensions] == {}
    payload.delete("extensions") if payload["extensions"].nil? || payload["extensions"] == {}
    if passkeys.any?
      payload[:allowCredentials] = passkeys.map { |passkey| Credentials.credential_descriptor(passkey) }
    else
      payload.delete(:allowCredentials)
      payload.delete("allowCredentials")
    end
    ctx.json(payload)
  end
end

.verify_passkey_authentication_endpoint(config) ⇒ Object 



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# File 'lib/better_auth/passkey/routes/authentication.rb', line 41

def verify_passkey_authentication_endpoint(config)
  Endpoint.new(path: "/passkey/verify-authentication", method: "POST", metadata: Routes.openapi_for(:verify_authentication)) do |ctx|
    body = Utils.normalize_hash(ctx.body)
    Utils.require_key!(body, :response)
    origin = Utils.origin(config, ctx)
    raise APIError.new("BAD_REQUEST", message: "origin missing") if origin.to_s.empty?

    verification_token = Challenges.challenge_token(ctx, config)
    raise APIError.new("BAD_REQUEST", message: ErrorCodes::PASSKEY_ERROR_CODES.fetch("CHALLENGE_NOT_FOUND")) unless verification_token

    challenge = Challenges.find_challenge(ctx, verification_token)
    raise APIError.new("BAD_REQUEST", message: ErrorCodes::PASSKEY_ERROR_CODES.fetch("CHALLENGE_NOT_FOUND")) unless challenge

    begin
      response = Credentials.webauthn_response(body[:response])
      credential_id = response.fetch("id")
      passkey = begin
        ctx.context.adapter.find_one(model: "passkey", where: [{field: "credentialID", value: credential_id}])
      rescue => error
        ctx.context.logger&.error("Failed to find passkey", error)
        raise APIError.new("BAD_REQUEST", message: ErrorCodes::PASSKEY_ERROR_CODES.fetch("AUTHENTICATION_FAILED"))
      end
      raise APIError.new("UNAUTHORIZED", message: ErrorCodes::PASSKEY_ERROR_CODES.fetch("PASSKEY_NOT_FOUND")) unless passkey

      relying_party = Utils.relying_party(config, ctx, origin: origin)
      credential = WebAuthn::Credential.from_get(response, relying_party: relying_party)
      credential.verify(
        challenge.fetch("expectedChallenge"),
        public_key: Base64.strict_decode64(passkey.fetch("publicKey")),
        sign_count: passkey.fetch("counter").to_i,
        user_verification: false
      )
      Utils.call_callback(config.dig(:authentication, :after_verification), {
        ctx: ctx,
        verification: credential,
        client_data: response
      })
      updated_passkey = ctx.context.adapter.update(
        model: "passkey",
        where: [{field: "id", value: passkey.fetch("id")}],
        update: {counter: credential.sign_count.to_i}
      )
      unless updated_passkey
        raise APIError.new("BAD_REQUEST", message: ErrorCodes::PASSKEY_ERROR_CODES.fetch("AUTHENTICATION_FAILED"))
      end

      user = ctx.context.internal_adapter.find_user_by_id(passkey.fetch("userId"))
      raise APIError.new("INTERNAL_SERVER_ERROR", message: "User not found") unless user

      session = ctx.context.internal_adapter.create_session(passkey.fetch("userId"))
      raise APIError.new("INTERNAL_SERVER_ERROR", message: ErrorCodes::PASSKEY_ERROR_CODES.fetch("UNABLE_TO_CREATE_SESSION")) unless session

      Cookies.set_session_cookie(ctx, {session: session, user: user})
      ctx.context.internal_adapter.delete_verification_by_identifier(verification_token)
      ctx.json({session: session, user: user})
    rescue WebAuthn::Error, ArgumentError => error
      ctx.context.internal_adapter.delete_verification_by_identifier(verification_token)
      ctx.context.logger&.error("Failed to verify authentication", error)
      raise APIError.new("BAD_REQUEST", message: ErrorCodes::PASSKEY_ERROR_CODES.fetch("AUTHENTICATION_FAILED"))
    rescue APIError
      ctx.context.internal_adapter.delete_verification_by_identifier(verification_token)
      raise
    rescue => error
      ctx.context.internal_adapter.delete_verification_by_identifier(verification_token)
      ctx.context.logger&.error("Failed to verify authentication", error)
      raise APIError.new("BAD_REQUEST", message: ErrorCodes::PASSKEY_ERROR_CODES.fetch("AUTHENTICATION_FAILED"))
    end
  end
end