discourse/lib/webauthn.rb

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# frozen_string_literal: true
require 'webauthn/challenge_generator'
require 'webauthn/security_key_base_validation_service'
require 'webauthn/security_key_registration_service'
require 'webauthn/security_key_authentication_service'
module Webauthn
ACCEPTABLE_REGISTRATION_TYPE = "webauthn.create".freeze
ACCEPTABLE_AUTHENTICATION_TYPE = "webauthn.get".freeze
# -7 - ES256
# -257 - RS256 (Windows Hello supported alg.)
SUPPORTED_ALGORITHMS = [-7, -257].freeze
VALID_ATTESTATION_FORMATS = ['none', 'packed', 'fido-u2f'].freeze
class SecurityKeyError < StandardError; end
class InvalidOriginError < SecurityKeyError; end
class InvalidRelyingPartyIdError < SecurityKeyError; end
class UserVerificationError < SecurityKeyError; end
class ChallengeMismatchError < SecurityKeyError; end
class InvalidTypeError < SecurityKeyError; end
class UnsupportedPublicKeyAlgorithmError < SecurityKeyError; end
class UnsupportedAttestationFormatError < SecurityKeyError; end
class CredentialIdInUseError < SecurityKeyError; end
class MalformedAttestationError < SecurityKeyError; end
class NotFoundError < SecurityKeyError; end
class OwnershipError < SecurityKeyError; end
class PublicKeyError < SecurityKeyError; end
class UnknownCOSEAlgorithmError < SecurityKeyError; end
##
# Usage:
#
# These methods should be used in controllers where we
# are challenging the user that has a security key, and
# they must respond with a valid webauthn response and
# credentials.
def self.stage_challenge(user, secure_session)
::Webauthn::ChallengeGenerator.generate.commit_to_session(secure_session, user)
end
def self.allowed_credentials(user, secure_session)
return {} if !user.security_keys_enabled?
credential_ids = user.second_factor_security_key_credential_ids
{
allowed_credential_ids: credential_ids,
challenge: secure_session[
Webauthn::ChallengeGenerator::ChallengeSession.session_challenge_key(user)
]
}
end
def self.rp_id(user, secure_session)
secure_session[Webauthn::ChallengeGenerator::ChallengeSession.session_rp_id_key(user)]
end
def self.rp_name(user, secure_session)
secure_session[Webauthn::ChallengeGenerator::ChallengeSession.session_rp_name_key(user)]
end
def self.challenge(user, secure_session)
secure_session[Webauthn::ChallengeGenerator::ChallengeSession.session_challenge_key(user)]
end
end