discourse/app/models/discourse_connect.rb

423 lines
13 KiB
Ruby

# frozen_string_literal: true
class DiscourseConnect < DiscourseConnectBase
class BlankExternalId < StandardError; end
class BannedExternalId < StandardError; end
def self.sso_url
SiteSetting.discourse_connect_url
end
def self.sso_secret
SiteSetting.discourse_connect_secret
end
def self.generate_sso(return_path = "/", secure_session:)
sso = new(secure_session: secure_session)
sso.nonce = SecureRandom.hex
sso.register_nonce(return_path)
sso.return_sso_url = Discourse.base_url + "/session/sso_login"
sso
end
def self.generate_url(return_path = "/", secure_session:)
generate_sso(return_path, secure_session: secure_session).to_url
end
def initialize(secure_session:)
@secure_session = secure_session
end
def register_nonce(return_path)
if nonce
if SiteSetting.discourse_connect_csrf_protection
@secure_session.set(nonce_key, return_path, expires: DiscourseConnectBase.nonce_expiry_time)
else
Discourse.cache.write(nonce_key, return_path, expires_in: DiscourseConnectBase.nonce_expiry_time)
end
end
end
def nonce_valid?
if SiteSetting.discourse_connect_csrf_protection
nonce && @secure_session[nonce_key].present?
else
nonce && Discourse.cache.read(nonce_key).present?
end
end
def nonce_error
if Discourse.cache.read(used_nonce_key).present?
"Nonce has already been used"
elsif SiteSetting.discourse_connect_csrf_protection
"Nonce is incorrect, was generated in a different browser session, or has expired"
else
"Nonce is incorrect, or has expired"
end
end
def return_path
if SiteSetting.discourse_connect_csrf_protection
@secure_session[nonce_key] || "/"
else
Discourse.cache.read(nonce_key) || "/"
end
end
def expire_nonce!
if nonce
if SiteSetting.discourse_connect_csrf_protection
@secure_session[nonce_key] = nil
else
Discourse.cache.delete nonce_key
end
Discourse.cache.write(used_nonce_key, return_path, expires_in: DiscourseConnectBase.used_nonce_expiry_time)
end
end
def nonce_key
"SSO_NONCE_#{nonce}"
end
def used_nonce_key
"USED_SSO_NONCE_#{nonce}"
end
BANNED_EXTERNAL_IDS = %w{none nil blank null}
def lookup_or_create_user(ip_address = nil)
# we don't want to ban 0 from being an external id
external_id = self.external_id.to_s
if external_id.blank?
raise BlankExternalId
end
if BANNED_EXTERNAL_IDS.include?(external_id.downcase)
raise BannedExternalId, external_id
end
# we protect here to ensure there is no situation where the same external id
# concurrently attempts to create or update sso records
#
# we can get duplicate HTTP requests quite easily (client rapid refresh) and this path does stuff such
# as updating groups for a users and so on that can happen even after the sso record and user is there
DistributedMutex.synchronize("sso_lookup_or_create_user_#{external_id}") do
lookup_or_create_user_unsafe(ip_address)
end
end
private
def lookup_or_create_user_unsafe(ip_address)
sso_record = SingleSignOnRecord.find_by(external_id: external_id)
if sso_record && (user = sso_record.user)
sso_record.last_payload = unsigned_payload
else
user = match_email_or_create_user(ip_address)
sso_record = user.single_sign_on_record
end
# ensure it's not staged anymore
user.unstage!
change_external_attributes_and_override(sso_record, user)
if sso_record && (user = sso_record.user) && !user.active && !require_activation
user.active = true
user.save!
user.enqueue_welcome_message('welcome_user') unless suppress_welcome_message
user.set_automatic_groups
end
custom_fields.each do |k, v|
user.custom_fields[k] = v
end
user.ip_address = ip_address
user.admin = admin unless admin.nil?
user.moderator = moderator unless moderator.nil?
user.title = title unless title.nil?
# optionally save the user and sso_record if they have changed
user.user_avatar.save! if user.user_avatar
user.save!
if @email_changed && user.active
user.set_automatic_groups
end
# The user might require approval
user.create_reviewable
if bio && (user.user_profile.bio_raw.blank? || SiteSetting.discourse_connect_overrides_bio)
user.user_profile.bio_raw = bio
user.user_profile.save!
end
if website
user.user_profile.website = website
user.user_profile.save!
end
if location
user.user_profile.location = location
user.user_profile.save!
end
unless admin.nil? && moderator.nil?
Group.refresh_automatic_groups!(:admins, :moderators, :staff)
end
sso_record.save!
if sso_record.user
apply_group_rules(sso_record.user)
end
sso_record && sso_record.user
end
def synchronize_groups(user)
names = (groups || "").split(",").map(&:downcase)
current_groups = user.groups.where(automatic: false)
desired_groups = Group.where('LOWER(NAME) in (?) AND NOT automatic', names)
to_be_added = desired_groups
if current_groups.present?
to_be_added = to_be_added.where("groups.id NOT IN (?)", current_groups.map(&:id))
end
to_be_removed = current_groups
if desired_groups.present?
to_be_removed = to_be_removed.where("groups.id NOT IN (?)", desired_groups.map(&:id))
end
if to_be_added.present? || to_be_removed.present?
GroupUser.transaction do
add_user_to_groups(user, to_be_added) if to_be_added.present?
remove_user_from_groups(user, to_be_removed) if to_be_removed.present?
end
end
end
def apply_group_rules(user)
if SiteSetting.discourse_connect_overrides_groups
synchronize_groups(user)
return
end
to_be_added = nil
if add_groups
split = add_groups.split(",").map(&:downcase)
if split.length > 0
to_be_added = Group.where('LOWER(name) in (?) AND NOT automatic', split)
if already_member = GroupUser.where(user_id: user.id).pluck(:group_id).presence
to_be_added = to_be_added.where("id NOT IN (?)", already_member)
end
end
end
to_be_removed = nil
if remove_groups
split = remove_groups.split(",").map(&:downcase)
if split.length > 0
to_be_removed = Group
.joins(:group_users)
.where(automatic: false, group_users: { user_id: user.id })
.where("LOWER(name) IN (?)", split)
end
end
if to_be_added || to_be_removed
GroupUser.transaction do
add_user_to_groups(user, to_be_added) if to_be_added
remove_user_from_groups(user, to_be_removed) if to_be_removed
end
end
end
def match_email_or_create_user(ip_address)
# Use a mutex here to counter SSO requests that are sent at the same time with
# the same email payload
DistributedMutex.synchronize("discourse_single_sign_on_#{email}") do
user = User.find_by_email(email) if !require_activation
if !user
user_params = {
primary_email: UserEmail.new(email: email, primary: true),
name: resolve_name,
username: resolve_username,
ip_address: ip_address
}
if SiteSetting.allow_user_locale && locale && LocaleSiteSetting.valid_value?(locale)
user_params[:locale] = locale
end
user = User.new(user_params)
if SiteSetting.must_approve_users && EmailValidator.can_auto_approve_user?(email)
ReviewableUser.set_approved_fields!(user, Discourse.system_user)
end
user.save!
if SiteSetting.verbose_discourse_connect_logging
Rails.logger.warn("Verbose SSO log: New User (user_id: #{user.id}) Params: #{user_params} User Params: #{user.attributes} User Errors: #{user.errors.full_messages} Email: #{user.primary_email.attributes} Email Error: #{user.primary_email.errors.full_messages}")
end
end
if user
if sso_record = user.single_sign_on_record
sso_record.last_payload = unsigned_payload
sso_record.external_id = external_id
else
if avatar_url.present?
Jobs.enqueue(:download_avatar_from_url,
url: avatar_url,
user_id: user.id,
override_gravatar: SiteSetting.discourse_connect_overrides_avatar
)
end
if profile_background_url.present?
Jobs.enqueue(:download_profile_background_from_url,
url: profile_background_url,
user_id: user.id,
is_card_background: false
)
end
if card_background_url.present?
Jobs.enqueue(:download_profile_background_from_url,
url: card_background_url,
user_id: user.id,
is_card_background: true
)
end
user.create_single_sign_on_record!(
last_payload: unsigned_payload,
external_id: external_id,
external_username: username,
external_email: email,
external_name: name,
external_avatar_url: avatar_url,
external_profile_background_url: profile_background_url,
external_card_background_url: card_background_url
)
end
end
user
end
end
def change_external_attributes_and_override(sso_record, user)
@email_changed = false
if SiteSetting.auth_overrides_email && user.email != Email.downcase(email)
user.email = email
user.active = false if require_activation
@email_changed = true
end
if SiteSetting.auth_overrides_username? && username.present?
UsernameChanger.override(user, username)
end
if SiteSetting.auth_overrides_name && user.name != name && name.present?
user.name = name || User.suggest_name(username.blank? ? email : username)
end
if locale_force_update && SiteSetting.allow_user_locale && locale && LocaleSiteSetting.valid_value?(locale)
user.locale = locale
end
avatar_missing = user.uploaded_avatar_id.nil? || !Upload.exists?(user.uploaded_avatar_id)
if (avatar_missing || avatar_force_update || SiteSetting.discourse_connect_overrides_avatar) && avatar_url.present?
avatar_changed = sso_record.external_avatar_url != avatar_url
if avatar_force_update || avatar_changed || avatar_missing
Jobs.enqueue(:download_avatar_from_url, url: avatar_url, user_id: user.id, override_gravatar: SiteSetting.discourse_connect_overrides_avatar)
end
end
if profile_background_url.present?
profile_background_missing = user.user_profile.profile_background_upload.blank? || Upload.get_from_url(user.user_profile.profile_background_upload.url).blank?
if profile_background_missing || SiteSetting.discourse_connect_overrides_profile_background
profile_background_changed = sso_record.external_profile_background_url != profile_background_url
if profile_background_changed || profile_background_missing
Jobs.enqueue(:download_profile_background_from_url,
url: profile_background_url,
user_id: user.id,
is_card_background: false
)
end
end
end
if card_background_url.present?
card_background_missing = user.user_profile.card_background_upload.blank? || Upload.get_from_url(user.user_profile.card_background_upload.url).blank?
if card_background_missing || SiteSetting.discourse_connect_overrides_card_background
card_background_changed = sso_record.external_card_background_url != card_background_url
if card_background_changed || card_background_missing
Jobs.enqueue(:download_profile_background_from_url,
url: card_background_url,
user_id: user.id,
is_card_background: true
)
end
end
end
# change external attributes for sso record
sso_record.external_username = username
sso_record.external_email = email
sso_record.external_name = name
sso_record.external_avatar_url = avatar_url
sso_record.external_profile_background_url = profile_background_url
sso_record.external_card_background_url = card_background_url
end
def resolve_username
suggester_input = [username]
suggester_input << name if SiteSetting.use_name_for_username_suggestions
suggester_input << email if SiteSetting.use_email_for_username_and_name_suggestions
UserNameSuggester.suggest(*suggester_input)
end
def resolve_name
name_suggester_input = username.presence
if SiteSetting.use_email_for_username_and_name_suggestions
name_suggester_input = name_suggester_input || email
end
name.presence || User.suggest_name(name_suggester_input)
end
def add_user_to_groups(user, groups)
groups.each do |group|
GroupUser.create!(user_id: user.id, group_id: group.id)
GroupActionLogger.new(Discourse.system_user, group).log_add_user_to_group(user)
end
end
def remove_user_from_groups(user, groups)
GroupUser.where(user_id: user.id, group_id: groups.map(&:id)).destroy_all
groups.each do |group|
GroupActionLogger.new(Discourse.system_user, group).log_remove_user_from_group(user)
end
end
end