6f36b633a7
* Prevent different identities from a same SSO provider from accessing a same account * Lock auth provider changes behind `ALLOW_UNSAFE_AUTH_PROVIDER_REATTACH=true` * Rename methods to avoid confusion between OAuth and OmniAuth
128 lines
4 KiB
Ruby
128 lines
4 KiB
Ruby
# frozen_string_literal: true
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module Omniauthable
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extend ActiveSupport::Concern
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TEMP_EMAIL_PREFIX = 'change@me'
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TEMP_EMAIL_REGEX = /\A#{TEMP_EMAIL_PREFIX}/.freeze
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included do
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devise :omniauthable
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def omniauth_providers
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Devise.omniauth_configs.keys
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end
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def email_present?
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email && email !~ TEMP_EMAIL_REGEX
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end
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end
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class_methods do
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def find_for_omniauth(auth, signed_in_resource = nil)
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# EOLE-SSO Patch
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auth.uid = (auth.uid[0][:uid] || auth.uid[0][:user]) if auth.uid.is_a? Hashie::Array
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identity = Identity.find_for_omniauth(auth)
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# If a signed_in_resource is provided it always overrides the existing user
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# to prevent the identity being locked with accidentally created accounts.
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# Note that this may leave zombie accounts (with no associated identity) which
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# can be cleaned up at a later date.
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user = signed_in_resource || identity.user
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user ||= reattach_for_auth(auth)
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user ||= create_for_auth(auth)
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if identity.user.nil?
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identity.user = user
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identity.save!
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end
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user
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end
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private
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def reattach_for_auth(auth)
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# If allowed, check if a user exists with the provided email address,
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# and return it if they does not have an associated identity with the
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# current authentication provider.
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# This can be used to provide a choice of alternative auth providers
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# or provide smooth gradual transition between multiple auth providers,
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# but this is discouraged because any insecure provider will put *all*
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# local users at risk, regardless of which provider they registered with.
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return unless ENV['ALLOW_UNSAFE_AUTH_PROVIDER_REATTACH'] == 'true'
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email, email_is_verified = email_from_auth(auth)
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return unless email_is_verified
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user = User.find_by(email: email)
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return if user.nil? || Identity.exists?(provider: auth.provider, user_id: user.id)
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user
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end
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def create_for_auth(auth)
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# Create a user for the given auth params. If no email was provided,
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# we assign a temporary email and ask the user to verify it on
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# the next step via Auth::SetupController.show
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email, email_is_verified = email_from_auth(auth)
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user = User.new(user_params_from_auth(email, auth))
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begin
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if /\A#{URI::DEFAULT_PARSER.make_regexp(%w(http https))}\z/.match?(auth.info.image)
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user.account.avatar_remote_url = auth.info.image
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end
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rescue Mastodon::UnexpectedResponseError
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user.account.avatar_remote_url = nil
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end
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user.skip_confirmation! if email_is_verified
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user.save!
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user
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end
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def email_from_auth(auth)
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strategy = Devise.omniauth_configs[auth.provider.to_sym].strategy
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assume_verified = strategy&.security&.assume_email_is_verified
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email_is_verified = auth.info.verified || auth.info.verified_email || auth.info.email_verified || assume_verified
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email = auth.info.verified_email || auth.info.email
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[email, email_is_verified]
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end
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def user_params_from_auth(email, auth)
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{
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email: email || "#{TEMP_EMAIL_PREFIX}-#{auth.uid}-#{auth.provider}.com",
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agreement: true,
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external: true,
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account_attributes: {
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username: ensure_unique_username(ensure_valid_username(auth.uid)),
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display_name: auth.info.full_name || auth.info.name || [auth.info.first_name, auth.info.last_name].join(' '),
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},
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}
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end
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def ensure_unique_username(starting_username)
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username = starting_username
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i = 0
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while Account.exists?(username: username, domain: nil)
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i += 1
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username = "#{starting_username}_#{i}"
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end
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username
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end
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def ensure_valid_username(starting_username)
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starting_username = starting_username.split('@')[0]
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temp_username = starting_username.gsub(/[^a-z0-9_]+/i, '')
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temp_username.truncate(30, omission: '')
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end
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end
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end
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