discourse/app/controllers/session_controller.rb

792 lines
25 KiB
Ruby

# frozen_string_literal: true
class SessionController < ApplicationController
before_action :check_local_login_allowed, only: %i(create forgot_password)
before_action :rate_limit_login, only: %i(create email_login)
skip_before_action :redirect_to_login_if_required
skip_before_action :preload_json, :check_xhr, only: %i(sso sso_login sso_provider destroy one_time_password)
skip_before_action :check_xhr, only: %i(second_factor_auth_show)
requires_login only: [:second_factor_auth_show, :second_factor_auth_perform]
allow_in_staff_writes_only_mode :create
allow_in_staff_writes_only_mode :email_login
ACTIVATE_USER_KEY = "activate_user"
def csrf
render json: { csrf: form_authenticity_token }
end
def sso
raise Discourse::NotFound unless SiteSetting.enable_discourse_connect?
destination_url = cookies[:destination_url] || session[:destination_url]
return_path = params[:return_path] || path('/')
if destination_url && return_path == path('/')
uri = URI::parse(destination_url)
return_path = "#{uri.path}#{uri.query ? "?#{uri.query}" : ""}"
end
session.delete(:destination_url)
cookies.delete(:destination_url)
sso = DiscourseConnect.generate_sso(return_path, secure_session: secure_session)
connect_verbose_warn { "Verbose SSO log: Started SSO process\n\n#{sso.diagnostics}" }
redirect_to sso_url(sso), allow_other_host: true
end
def sso_provider(payload = nil, confirmed_2fa_during_login = false)
raise Discourse::NotFound unless SiteSetting.enable_discourse_connect_provider
result = run_second_factor!(
SecondFactor::Actions::DiscourseConnectProvider,
payload: payload,
confirmed_2fa_during_login: confirmed_2fa_during_login
)
if result.second_factor_auth_skipped?
data = result.data
if data[:logout]
params[:return_url] = data[:return_sso_url]
destroy
return
end
if data[:no_current_user]
cookies[:sso_payload] = payload || request.query_string
redirect_to path('/login')
return
end
if request.xhr?
# for the login modal
cookies[:sso_destination_url] = data[:sso_redirect_url]
else
redirect_to data[:sso_redirect_url], allow_other_host: true
end
elsif result.no_second_factors_enabled?
if request.xhr?
# for the login modal
cookies[:sso_destination_url] = result.data[:sso_redirect_url]
else
redirect_to result.data[:sso_redirect_url], allow_other_host: true
end
elsif result.second_factor_auth_completed?
redirect_url = result.data[:sso_redirect_url]
render json: success_json.merge(redirect_url: redirect_url)
end
rescue DiscourseConnectProvider::BlankSecret
render plain: I18n.t("discourse_connect.missing_secret"), status: 400
rescue DiscourseConnectProvider::ParseError
# Do NOT pass the error text to the client, it would give them the correct signature
render plain: I18n.t("discourse_connect.login_error"), status: 422
rescue DiscourseConnectProvider::BlankReturnUrl
render plain: "return_sso_url is blank, it must be provided", status: 400
end
# For use in development mode only when login options could be limited or disabled.
# NEVER allow this to work in production.
if !Rails.env.production?
skip_before_action :check_xhr, only: [:become]
def become
raise Discourse::InvalidAccess if Rails.env.production?
raise Discourse::ReadOnly if @readonly_mode
if ENV['DISCOURSE_DEV_ALLOW_ANON_TO_IMPERSONATE'] != "1"
render(content_type: 'text/plain', inline: <<~TEXT)
To enable impersonating any user without typing passwords set the following ENV var
export DISCOURSE_DEV_ALLOW_ANON_TO_IMPERSONATE=1
You can do that in your bashrc of bash profile file or the script you use to launch the web server
TEXT
return
end
user = User.find_by_username(params[:session_id])
raise "User #{params[:session_id]} not found" if user.blank?
log_on_user(user)
redirect_to path("/")
end
end
def sso_login
raise Discourse::NotFound unless SiteSetting.enable_discourse_connect
raise Discourse::ReadOnly if @readonly_mode && !staff_writes_only_mode?
params.require(:sso)
params.require(:sig)
begin
sso = DiscourseConnect.parse(request.query_string, secure_session: secure_session)
rescue DiscourseConnect::ParseError => e
connect_verbose_warn { "Verbose SSO log: Signature parse error\n\n#{e.message}\n\n#{sso&.diagnostics}" }
# Do NOT pass the error text to the client, it would give them the correct signature
return render_sso_error(text: I18n.t("discourse_connect.login_error"), status: 422)
end
if !sso.nonce_valid?
connect_verbose_warn { "Verbose SSO log: #{sso.nonce_error}\n\n#{sso.diagnostics}" }
return render_sso_error(text: I18n.t("discourse_connect.timeout_expired"), status: 419)
end
if ScreenedIpAddress.should_block?(request.remote_ip)
connect_verbose_warn { "Verbose SSO log: IP address is blocked #{request.remote_ip}\n\n#{sso.diagnostics}" }
return render_sso_error(text: I18n.t("discourse_connect.unknown_error"), status: 500)
end
return_path = sso.return_path
sso.expire_nonce!
begin
invite = validate_invitiation!(sso)
if user = sso.lookup_or_create_user(request.remote_ip)
raise Discourse::ReadOnly if staff_writes_only_mode? && !user&.staff?
if user.suspended?
render_sso_error(text: failed_to_login(user)[:error], status: 403)
return
end
if SiteSetting.must_approve_users? && !user.approved?
if invite.present? && user.invited_user.blank?
redeem_invitation(invite, sso)
end
if SiteSetting.discourse_connect_not_approved_url.present?
redirect_to SiteSetting.discourse_connect_not_approved_url, allow_other_host: true
else
render_sso_error(text: I18n.t("discourse_connect.account_not_approved"), status: 403)
end
return
# we only want to redeem the invite if
# the user has not already redeemed an invite
# (covers the same SSO user visiting an invite link)
elsif invite.present? && user.invited_user.blank?
redeem_invitation(invite, sso)
# we directly call user.activate here instead of going
# through the UserActivator path because we assume the account
# is valid from the SSO provider's POV and do not need to
# send an activation email to the user
user.activate
login_sso_user(sso, user)
topic = invite.topics.first
return_path = topic.present? ? path(topic.relative_url) : path("/")
elsif !user.active?
activation = UserActivator.new(user, request, session, cookies)
activation.finish
session["user_created_message"] = activation.message
return redirect_to(users_account_created_path)
else
login_sso_user(sso, user)
end
# If it's not a relative URL check the host
if return_path !~ /^\/[^\/]/
begin
uri = URI(return_path)
if (uri.hostname == Discourse.current_hostname)
return_path = uri.to_s
elsif !SiteSetting.discourse_connect_allows_all_return_paths
return_path = path("/")
end
rescue
return_path = path("/")
end
end
# this can be done more surgically with a regex
# but it the edge case of never supporting redirects back to
# any url with `/session/sso` in it anywhere is reasonable
if return_path.include?(path("/session/sso"))
return_path = path("/")
end
redirect_to return_path, allow_other_host: true
else
render_sso_error(text: I18n.t("discourse_connect.not_found"), status: 500)
end
rescue ActiveRecord::RecordInvalid => e
connect_verbose_warn { <<~TEXT }
Verbose SSO log: Record was invalid: #{e.record.class.name} #{e.record.id}
#{e.record.errors.to_h}
Attributes:
#{e.record.attributes.slice(*DiscourseConnectBase::ACCESSORS.map(&:to_s))}
SSO Diagnostics:
#{sso.diagnostics}
TEXT
text = nil
# If there's a problem with the email we can explain that
if (e.record.is_a?(User) && e.record.errors[:primary_email].present?)
if e.record.email.blank?
text = I18n.t("discourse_connect.no_email")
else
text = I18n.t("discourse_connect.email_error", email: ERB::Util.html_escape(e.record.email))
end
end
render_sso_error(text: text || I18n.t("discourse_connect.unknown_error"), status: 500)
rescue DiscourseConnect::BlankExternalId
render_sso_error(text: I18n.t("discourse_connect.blank_id_error"), status: 500)
rescue Invite::ValidationFailed => e
render_sso_error(text: e.message, status: 400)
rescue Invite::RedemptionFailed => e
render_sso_error(text: I18n.t("discourse_connect.invite_redeem_failed"), status: 412)
rescue Invite::UserExists => e
render_sso_error(text: e.message, status: 412)
rescue => e
message = +"Failed to create or lookup user: #{e}."
message << " "
message << " #{sso.diagnostics}"
message << " "
message << " #{e.backtrace.join("\n")}"
Rails.logger.error(message)
render_sso_error(text: I18n.t("discourse_connect.unknown_error"), status: 500)
end
end
def login_sso_user(sso, user)
connect_verbose_warn { "Verbose SSO log: User was logged on #{user.username}\n\n#{sso.diagnostics}" }
log_on_user(user) if user.id != current_user&.id
end
def create
params.require(:login)
params.require(:password)
return invalid_credentials if params[:password].length > User.max_password_length
user = User.find_by_username_or_email(normalized_login_param)
raise Discourse::ReadOnly if staff_writes_only_mode? && !user&.staff?
rate_limit_second_factor!(user)
if user.present?
# If their password is correct
unless user.confirm_password?(params[:password])
invalid_credentials
return
end
# If the site requires user approval and the user is not approved yet
if login_not_approved_for?(user)
render json: login_not_approved
return
end
# User signed on with username and password, so let's prevent the invite link
# from being used to log in (if one exists).
Invite.invalidate_for_email(user.email)
else
invalid_credentials
return
end
if payload = login_error_check(user)
return render json: payload
end
second_factor_auth_result = authenticate_second_factor(user)
if !second_factor_auth_result.ok
return render(json: @second_factor_failure_payload)
end
if user.active && user.email_confirmed?
login(user, second_factor_auth_result)
else
not_activated(user)
end
end
def email_login_info
token = params[:token]
matched_token = EmailToken.confirmable(token, scope: EmailToken.scopes[:email_login])
user = matched_token&.user
check_local_login_allowed(user: user, check_login_via_email: true)
if matched_token
response = {
can_login: true,
token: token,
token_email: matched_token.email
}
matched_user = matched_token.user
if matched_user&.totp_enabled?
response.merge!(
second_factor_required: true,
backup_codes_enabled: matched_user&.backup_codes_enabled?
)
end
if matched_user&.security_keys_enabled?
Webauthn.stage_challenge(matched_user, secure_session)
response.merge!(
Webauthn.allowed_credentials(matched_user, secure_session).merge(security_key_required: true)
)
end
render json: response
else
render json: {
can_login: false,
error: I18n.t('email_login.invalid_token')
}
end
end
def email_login
token = params[:token]
matched_token = EmailToken.confirmable(token, scope: EmailToken.scopes[:email_login])
user = matched_token&.user
check_local_login_allowed(user: user, check_login_via_email: true)
rate_limit_second_factor!(user)
if user.present? && !authenticate_second_factor(user).ok
return render(json: @second_factor_failure_payload)
end
if user = EmailToken.confirm(token, scope: EmailToken.scopes[:email_login])
if login_not_approved_for?(user)
return render json: login_not_approved
elsif payload = login_error_check(user)
return render json: payload
else
raise Discourse::ReadOnly if staff_writes_only_mode? && !user&.staff?
user.update_timezone_if_missing(params[:timezone])
log_on_user(user)
return render json: success_json
end
end
render json: { error: I18n.t('email_login.invalid_token') }
end
def one_time_password
@otp_username = otp_username = Discourse.redis.get "otp_#{params[:token]}"
if otp_username && user = User.find_by_username(otp_username)
if current_user&.username == otp_username
Discourse.redis.del "otp_#{params[:token]}"
return redirect_to path("/")
elsif request.post?
log_on_user(user)
Discourse.redis.del "otp_#{params[:token]}"
return redirect_to path("/")
else
# Display the form
end
else
@error = I18n.t('user_api_key.invalid_token')
end
render layout: 'no_ember', locals: { hide_auth_buttons: true }
end
def second_factor_auth_show
user = current_user
nonce = params.require(:nonce)
challenge = nil
error_key = nil
status_code = 200
begin
challenge = SecondFactor::AuthManager.find_second_factor_challenge(nonce, secure_session)
rescue SecondFactor::BadChallenge => exception
error_key = exception.error_translation_key
status_code = exception.status_code
end
json = {}
if challenge
json.merge!(
totp_enabled: user.totp_enabled?,
backup_enabled: user.backup_codes_enabled?,
allowed_methods: challenge[:allowed_methods]
)
if user.security_keys_enabled?
Webauthn.stage_challenge(user, secure_session)
json.merge!(Webauthn.allowed_credentials(user, secure_session))
json[:security_keys_enabled] = true
else
json[:security_keys_enabled] = false
end
if challenge[:description]
json[:description] = challenge[:description]
end
else
json[:error] = I18n.t(error_key)
end
respond_to do |format|
format.html do
store_preloaded("2fa_challenge_data", MultiJson.dump(json))
raise ApplicationController::RenderEmpty.new
end
format.json do
render json: json, status: status_code
end
end
end
def second_factor_auth_perform
nonce = params.require(:nonce)
challenge = nil
error_key = nil
status_code = 200
begin
challenge = SecondFactor::AuthManager.find_second_factor_challenge(nonce, secure_session)
rescue SecondFactor::BadChallenge => exception
error_key = exception.error_translation_key
status_code = exception.status_code
end
if error_key
json = failed_json.merge(
ok: false,
error: I18n.t(error_key),
reason: "challenge_not_found_or_expired"
)
render json: failed_json.merge(json), status: status_code
return
end
# no proper error messages for these cases because the only way they can
# happen is if someone is messing with us.
# the first one can only happen if someone disables a 2FA method after
# they're redirected to the 2fa page and then uses the same method they've
# disabled.
second_factor_method = params[:second_factor_method].to_i
if !current_user.valid_second_factor_method_for_user?(second_factor_method)
raise Discourse::InvalidAccess.new
end
# and this happens if someone tries to use a 2FA method that's not accepted
# for the action they're trying to perform. e.g. using backup codes to
# grant someone admin status.
if !challenge[:allowed_methods].include?(second_factor_method)
raise Discourse::InvalidAccess.new
end
if !challenge[:successful]
rate_limit_second_factor!(current_user)
second_factor_auth_result = current_user.authenticate_second_factor(params, secure_session)
if second_factor_auth_result.ok
challenge[:successful] = true
challenge[:generated_at] += 1.minute.to_i
secure_session["current_second_factor_auth_challenge"] = challenge.to_json
else
error_json = second_factor_auth_result
.to_h
.deep_symbolize_keys
.slice(:ok, :error, :reason)
.merge(failed_json)
render json: error_json, status: 400
return
end
end
render json: {
ok: true,
callback_method: challenge[:callback_method],
callback_path: challenge[:callback_path],
redirect_url: challenge[:redirect_url]
}, status: 200
end
def forgot_password
params.require(:login)
if ScreenedIpAddress.should_block?(request.remote_ip)
return render_json_error(I18n.t("login.reset_not_allowed_from_ip_address"))
end
RateLimiter.new(nil, "forgot-password-hr-#{request.remote_ip}", 6, 1.hour).performed!
RateLimiter.new(nil, "forgot-password-min-#{request.remote_ip}", 3, 1.minute).performed!
user = if SiteSetting.hide_email_address_taken && !current_user&.staff?
raise Discourse::InvalidParameters.new(:login) if !EmailAddressValidator.valid_value?(normalized_login_param)
User.real.where(staged: false).find_by_email(Email.downcase(normalized_login_param))
else
User.real.where(staged: false).find_by_username_or_email(normalized_login_param)
end
if user
RateLimiter.new(nil, "forgot-password-login-day-#{user.username}", 6, 1.day).performed!
email_token = user.email_tokens.create!(email: user.email, scope: EmailToken.scopes[:password_reset])
Jobs.enqueue(:critical_user_email, type: "forgot_password", user_id: user.id, email_token: email_token.token)
else
RateLimiter.new(nil, "forgot-password-login-hour-#{normalized_login_param}", 5, 1.hour).performed!
end
json = success_json
json[:user_found] = user.present? if !SiteSetting.hide_email_address_taken
render json: json
rescue RateLimiter::LimitExceeded
render_json_error(I18n.t("rate_limiter.slow_down"))
end
def current
if current_user.present?
render_serialized(current_user, CurrentUserSerializer)
else
render body: nil, status: 404
end
end
def destroy
redirect_url = params[:return_url].presence || SiteSetting.logout_redirect.presence
sso = SiteSetting.enable_discourse_connect
only_one_authenticator = !SiteSetting.enable_local_logins && Discourse.enabled_authenticators.length == 1
if SiteSetting.login_required && (sso || only_one_authenticator)
# In this situation visiting most URLs will start the auth process again
# Go to the `/login` page to avoid an immediate redirect
redirect_url ||= path("/login")
end
redirect_url ||= path("/")
event_data = { redirect_url: redirect_url, user: current_user, client_ip: request&.ip, user_agent: request&.user_agent }
DiscourseEvent.trigger(:before_session_destroy, event_data)
redirect_url = event_data[:redirect_url]
reset_session
log_off_user
if request.xhr?
render json: {
redirect_url: redirect_url
}
else
redirect_to redirect_url, allow_other_host: true
end
end
def get_honeypot_value
secure_session.set(HONEYPOT_KEY, honeypot_value, expires: 1.hour)
secure_session.set(CHALLENGE_KEY, challenge_value, expires: 1.hour)
render json: {
value: honeypot_value,
challenge: challenge_value,
expires_in: SecureSession.expiry
}
end
def scopes
if is_api?
key = request.env[Auth::DefaultCurrentUserProvider::HEADER_API_KEY]
api_key = ApiKey.active.with_key(key).first
render_serialized(api_key.api_key_scopes, ApiKeyScopeSerializer, root: 'scopes')
else
render body: nil, status: 404
end
end
protected
def normalized_login_param
login = params[:login].to_s
if login.present?
login = login[1..-1] if login[0] == "@"
User.normalize_username(login.strip)[0..100]
else
nil
end
end
def check_local_login_allowed(user: nil, check_login_via_email: false)
# admin-login can get around enabled SSO/disabled local logins
return if user&.admin?
if (check_login_via_email && !SiteSetting.enable_local_logins_via_email) ||
SiteSetting.enable_discourse_connect ||
!SiteSetting.enable_local_logins
raise Discourse::InvalidAccess, "SSO takes over local login or the local login is disallowed."
end
end
private
def connect_verbose_warn(&blk)
if SiteSetting.verbose_discourse_connect_logging
Rails.logger.warn(blk.call)
end
end
def authenticate_second_factor(user)
second_factor_authentication_result = user.authenticate_second_factor(params, secure_session)
if !second_factor_authentication_result.ok
failure_payload = second_factor_authentication_result.to_h
if user.security_keys_enabled?
Webauthn.stage_challenge(user, secure_session)
failure_payload.merge!(Webauthn.allowed_credentials(user, secure_session))
end
@second_factor_failure_payload = failed_json.merge(failure_payload)
return second_factor_authentication_result
end
second_factor_authentication_result
end
def login_error_check(user)
return failed_to_login(user) if user.suspended?
if ScreenedIpAddress.should_block?(request.remote_ip)
return not_allowed_from_ip_address(user)
end
if ScreenedIpAddress.block_admin_login?(user, request.remote_ip)
admin_not_allowed_from_ip_address(user)
end
end
def login_not_approved_for?(user)
SiteSetting.must_approve_users? && !user.approved? && !user.admin?
end
def invalid_credentials
render json: { error: I18n.t("login.incorrect_username_email_or_password") }
end
def login_not_approved
{ error: I18n.t("login.not_approved") }
end
def not_activated(user)
session[ACTIVATE_USER_KEY] = user.id
render json: {
error: I18n.t("login.not_activated"),
reason: 'not_activated',
sent_to_email: user.find_email || user.email,
current_email: user.email
}
end
def not_allowed_from_ip_address(user)
{ error: I18n.t("login.not_allowed_from_ip_address", username: user.username) }
end
def admin_not_allowed_from_ip_address(user)
{ error: I18n.t("login.admin_not_allowed_from_ip_address", username: user.username) }
end
def failed_to_login(user)
{
error: user.suspended_message,
reason: 'suspended'
}
end
def login(user, second_factor_auth_result)
session.delete(ACTIVATE_USER_KEY)
user.update_timezone_if_missing(params[:timezone])
log_on_user(user)
if payload = cookies.delete(:sso_payload)
confirmed_2fa_during_login = (
second_factor_auth_result&.ok &&
second_factor_auth_result.used_2fa_method.present? &&
second_factor_auth_result.used_2fa_method != UserSecondFactor.methods[:backup_codes]
)
sso_provider(payload, confirmed_2fa_during_login)
else
render_serialized(user, UserSerializer)
end
end
def rate_limit_login
RateLimiter.new(
nil,
"login-hr-#{request.remote_ip}",
SiteSetting.max_logins_per_ip_per_hour,
1.hour
).performed!
RateLimiter.new(
nil,
"login-min-#{request.remote_ip}",
SiteSetting.max_logins_per_ip_per_minute,
1.minute
).performed!
end
def render_sso_error(status:, text:)
@sso_error = text
render status: status, layout: 'no_ember'
end
# extension to allow plugins to customize the SSO URL
def sso_url(sso)
sso.to_url
end
# the invite_key will be present if set in InvitesController
# when the user visits an /invites/xxxx link; however we do
# not want to complete the SSO process of creating a user
# and redeeming the invite if the invite is not redeemable or
# for the wrong user
def validate_invitiation!(sso)
invite_key = secure_session["invite-key"]
return if invite_key.blank?
invite = Invite.find_by(invite_key: invite_key)
if invite.blank?
raise Invite::ValidationFailed.new(I18n.t("invite.not_found", base_url: Discourse.base_url))
end
if invite.redeemable?
if !invite.is_invite_link? && sso.email != invite.email
raise Invite::ValidationFailed.new(I18n.t("invite.not_matching_email"))
end
elsif invite.expired?
raise Invite::ValidationFailed.new(I18n.t('invite.expired', base_url: Discourse.base_url))
elsif invite.redeemed?
raise Invite::ValidationFailed.new(I18n.t('invite.not_found_template', site_name: SiteSetting.title, base_url: Discourse.base_url))
end
invite
end
def redeem_invitation(invite, sso)
InviteRedeemer.new(
invite: invite,
username: sso.username,
name: sso.name,
ip_address: request.remote_ip,
session: session,
email: sso.email
).redeem
secure_session["invite-key"] = nil
# note - more specific errors are handled in the sso_login method
rescue ActiveRecord::RecordInvalid, ActiveRecord::RecordNotSaved => e
Rails.logger.warn("SSO invite redemption failed: #{e}")
raise Invite::RedemptionFailed
end
end