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020c77440e
Previously we limited Discourse Connect provider to 1 secret per domain. This made it pretty awkward to cycle secrets in environments where config takes time to propagate This change allows for the same domain to have multiple secrets Also fixes internal implementation on DiscourseConnectProvider which was not thread safe as it leaned on class variables to ferry data around Co-authored-by: Alan Guo Xiang Tan <gxtan1990@gmail.com> Co-authored-by: David Taylor <david@taylorhq.com>
63 lines
2.0 KiB
Ruby
63 lines
2.0 KiB
Ruby
# frozen_string_literal: true
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class DiscourseConnectProvider < DiscourseConnectBase
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class BlankSecret < RuntimeError; end
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class BlankReturnUrl < RuntimeError; end
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def self.parse(payload, sso_secret = nil, **init_kwargs)
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parsed_payload = Rack::Utils.parse_query(payload)
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return_sso_url = lookup_return_sso_url(parsed_payload)
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raise ParseError if !return_sso_url
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sso_secret ||= lookup_sso_secret(return_sso_url, parsed_payload)
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if sso_secret.blank?
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begin
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host = URI.parse(return_sso_url).host
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Rails.logger.warn("SSO failed; website #{host} is not in the `discourse_connect_provider_secrets` site settings")
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rescue StandardError => e
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# going for StandardError cause URI::Error may not be enough, eg it parses to something not
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# responding to host
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Discourse.warn_exception(e, message: "SSO failed; invalid or missing return_sso_url in SSO payload")
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end
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raise BlankSecret
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end
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super(payload, sso_secret, **init_kwargs)
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end
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def self.lookup_return_sso_url(parsed_payload)
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decoded = Base64.decode64(parsed_payload["sso"])
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decoded_hash = Rack::Utils.parse_query(decoded)
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decoded_hash['return_sso_url']
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end
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def self.lookup_sso_secret(return_sso_url, parsed_payload)
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return nil unless return_sso_url && SiteSetting.enable_discourse_connect_provider
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return_url_host = URI.parse(return_sso_url).host
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provider_secrets = SiteSetting
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.discourse_connect_provider_secrets
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.split("\n")
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.map { |row| row.split("|", 2) }
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.sort_by { |k, _| k }
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.reverse
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first_domain_match = nil
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pair = provider_secrets.find do |domain, configured_secret|
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if WildcardDomainChecker.check_domain(domain, return_url_host)
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first_domain_match ||= configured_secret
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sign(parsed_payload["sso"], configured_secret) == parsed_payload["sig"]
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end
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end
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# falls back to a secret which will fail to validate in DiscourseConnectBase
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# this ensures error flow is correct
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pair.present? ? pair[1] : first_domain_match
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end
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end
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