discourse/lib/single_sign_on_provider.rb

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# frozen_string_literal: true
require_dependency 'single_sign_on'
class SingleSignOnProvider < SingleSignOn
class BlankSecret < RuntimeError; end
def self.parse(payload, sso_secret = nil)
set_return_sso_url(payload)
if sso_secret.blank? && self.sso_secret.blank?
host = URI.parse(@return_sso_url).host
Rails.logger.warn("SSO failed; website #{host} is not in the `sso_provider_secrets` site settings")
raise BlankSecret
end
super
end
def self.set_return_sso_url(payload)
parsed = Rack::Utils.parse_query(payload)
decoded = Base64.decode64(parsed["sso"])
decoded_hash = Rack::Utils.parse_query(decoded)
@return_sso_url = decoded_hash['return_sso_url']
end
def self.sso_secret
return nil unless @return_sso_url && SiteSetting.enable_sso_provider
provider_secrets = SiteSetting.sso_provider_secrets.split(/[|\n]/)
provider_secrets_hash = Hash[*provider_secrets]
return_url_host = URI.parse(@return_sso_url).host
# moves wildcard domains to the end of hash
sorted_secrets = provider_secrets_hash.sort_by { |k, _| k }.reverse.to_h
secret = sorted_secrets.select do |domain, _|
WildcardDomainChecker.check_domain(domain, return_url_host)
end
secret.present? ? secret.values.first : nil
end
end