diff vendor/plugins/open_id_authentication/lib/open_id_authentication.rb @ 0:513646585e45

* Import Redmine trunk SVN rev 3859

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/plugins/open_id_authentication/lib/open_id_authentication.rb	Fri Jul 23 15:52:44 2010 +0100
@@ -0,0 +1,241 @@
+require 'uri'
+require 'openid/extensions/sreg'
+require 'openid/extensions/ax'
+require 'openid/store/filesystem'
+
+require File.dirname(__FILE__) + '/open_id_authentication/db_store'
+require File.dirname(__FILE__) + '/open_id_authentication/mem_cache_store'
+require File.dirname(__FILE__) + '/open_id_authentication/request'
+require File.dirname(__FILE__) + '/open_id_authentication/timeout_fixes' if OpenID::VERSION == "2.0.4"
+
+module OpenIdAuthentication
+  OPEN_ID_AUTHENTICATION_DIR = RAILS_ROOT + "/tmp/openids"
+
+  def self.store
+    @@store
+  end
+
+  def self.store=(*store_option)
+    store, *parameters = *([ store_option ].flatten)
+
+    @@store = case store
+    when :db
+      OpenIdAuthentication::DbStore.new
+    when :mem_cache
+      OpenIdAuthentication::MemCacheStore.new(*parameters)
+    when :file
+      OpenID::Store::Filesystem.new(OPEN_ID_AUTHENTICATION_DIR)
+    else
+      raise "Unknown store: #{store}"
+    end
+  end
+
+  self.store = :db
+
+  class InvalidOpenId < StandardError
+  end
+
+  class Result
+    ERROR_MESSAGES = {
+      :missing      => "Sorry, the OpenID server couldn't be found",
+      :invalid      => "Sorry, but this does not appear to be a valid OpenID",
+      :canceled     => "OpenID verification was canceled",
+      :failed       => "OpenID verification failed",
+      :setup_needed => "OpenID verification needs setup"
+    }
+
+    def self.[](code)
+      new(code)
+    end
+
+    def initialize(code)
+      @code = code
+    end
+
+    def status
+      @code
+    end
+
+    ERROR_MESSAGES.keys.each { |state| define_method("#{state}?") { @code == state } }
+
+    def successful?
+      @code == :successful
+    end
+
+    def unsuccessful?
+      ERROR_MESSAGES.keys.include?(@code)
+    end
+
+    def message
+      ERROR_MESSAGES[@code]
+    end
+  end
+
+  # normalizes an OpenID according to http://openid.net/specs/openid-authentication-2_0.html#normalization
+  def self.normalize_identifier(identifier)
+    # clean up whitespace
+    identifier = identifier.to_s.strip
+
+    # if an XRI has a prefix, strip it.
+    identifier.gsub!(/xri:\/\//i, '')
+
+    # dodge XRIs -- TODO: validate, don't just skip.
+    unless ['=', '@', '+', '$', '!', '('].include?(identifier.at(0))
+      # does it begin with http?  if not, add it.
+      identifier = "http://#{identifier}" unless identifier =~ /^http/i
+
+      # strip any fragments
+      identifier.gsub!(/\#(.*)$/, '')
+
+      begin
+        uri = URI.parse(identifier)
+        uri.scheme = uri.scheme.downcase  # URI should do this
+        identifier = uri.normalize.to_s
+      rescue URI::InvalidURIError
+        raise InvalidOpenId.new("#{identifier} is not an OpenID identifier")
+      end
+    end
+
+    return identifier
+  end
+
+  # deprecated for OpenID 2.0, where not all OpenIDs are URLs
+  def self.normalize_url(url)
+    ActiveSupport::Deprecation.warn "normalize_url has been deprecated, use normalize_identifier instead"
+    self.normalize_identifier(url)
+  end
+
+  protected
+    def normalize_url(url)
+      OpenIdAuthentication.normalize_url(url)
+    end
+
+    def normalize_identifier(url)
+      OpenIdAuthentication.normalize_identifier(url)
+    end
+
+    # The parameter name of "openid_identifier" is used rather than the Rails convention "open_id_identifier"
+    # because that's what the specification dictates in order to get browser auto-complete working across sites
+    def using_open_id?(identity_url = nil) #:doc:
+      identity_url ||= params[:openid_identifier] || params[:openid_url]
+      !identity_url.blank? || params[:open_id_complete]
+    end
+
+    def authenticate_with_open_id(identity_url = nil, options = {}, &block) #:doc:
+      identity_url ||= params[:openid_identifier] || params[:openid_url]
+
+      if params[:open_id_complete].nil?
+        begin_open_id_authentication(identity_url, options, &block)
+      else
+        complete_open_id_authentication(&block)
+      end
+    end
+
+  private
+    def begin_open_id_authentication(identity_url, options = {})
+      identity_url = normalize_identifier(identity_url)
+      return_to    = options.delete(:return_to)
+      method       = options.delete(:method)
+      
+      options[:required] ||= []  # reduces validation later
+      options[:optional] ||= []
+
+      open_id_request = open_id_consumer.begin(identity_url)
+      add_simple_registration_fields(open_id_request, options)
+      add_ax_fields(open_id_request, options)
+      redirect_to(open_id_redirect_url(open_id_request, return_to, method))
+    rescue OpenIdAuthentication::InvalidOpenId => e
+      yield Result[:invalid], identity_url, nil
+    rescue OpenID::OpenIDError, Timeout::Error => e
+      logger.error("[OPENID] #{e}")
+      yield Result[:missing], identity_url, nil
+    end
+
+    def complete_open_id_authentication
+      params_with_path = params.reject { |key, value| request.path_parameters[key] }
+      params_with_path.delete(:format)
+      open_id_response = timeout_protection_from_identity_server { open_id_consumer.complete(params_with_path, requested_url) }
+      identity_url     = normalize_identifier(open_id_response.display_identifier) if open_id_response.display_identifier
+
+      case open_id_response.status
+      when OpenID::Consumer::SUCCESS
+        profile_data = {}
+
+        # merge the SReg data and the AX data into a single hash of profile data
+        [ OpenID::SReg::Response, OpenID::AX::FetchResponse ].each do |data_response|
+          if data_response.from_success_response( open_id_response )
+            profile_data.merge! data_response.from_success_response( open_id_response ).data
+          end
+        end
+        
+        yield Result[:successful], identity_url, profile_data
+      when OpenID::Consumer::CANCEL
+        yield Result[:canceled], identity_url, nil
+      when OpenID::Consumer::FAILURE
+        yield Result[:failed], identity_url, nil
+      when OpenID::Consumer::SETUP_NEEDED
+        yield Result[:setup_needed], open_id_response.setup_url, nil
+      end
+    end
+
+    def open_id_consumer
+      OpenID::Consumer.new(session, OpenIdAuthentication.store)
+    end
+
+    def add_simple_registration_fields(open_id_request, fields)
+      sreg_request = OpenID::SReg::Request.new
+      
+      # filter out AX identifiers (URIs)
+      required_fields = fields[:required].collect { |f| f.to_s unless f =~ /^https?:\/\// }.compact
+      optional_fields = fields[:optional].collect { |f| f.to_s unless f =~ /^https?:\/\// }.compact
+      
+      sreg_request.request_fields(required_fields, true) unless required_fields.blank?
+      sreg_request.request_fields(optional_fields, false) unless optional_fields.blank?
+      sreg_request.policy_url = fields[:policy_url] if fields[:policy_url]
+      open_id_request.add_extension(sreg_request)
+    end
+    
+    def add_ax_fields( open_id_request, fields )
+      ax_request = OpenID::AX::FetchRequest.new
+      
+      # look through the :required and :optional fields for URIs (AX identifiers)
+      fields[:required].each do |f|
+        next unless f =~ /^https?:\/\//
+        ax_request.add( OpenID::AX::AttrInfo.new( f, nil, true ) )
+      end
+
+      fields[:optional].each do |f|
+        next unless f =~ /^https?:\/\//
+        ax_request.add( OpenID::AX::AttrInfo.new( f, nil, false ) )
+      end
+      
+      open_id_request.add_extension( ax_request )
+    end
+        
+    def open_id_redirect_url(open_id_request, return_to = nil, method = nil)
+      open_id_request.return_to_args['_method'] = (method || request.method).to_s
+      open_id_request.return_to_args['open_id_complete'] = '1'
+      open_id_request.redirect_url(root_url, return_to || requested_url)
+    end
+
+    def requested_url
+      relative_url_root = self.class.respond_to?(:relative_url_root) ?
+        self.class.relative_url_root.to_s :
+        request.relative_url_root
+      "#{request.protocol}#{request.host_with_port}#{relative_url_root}#{request.path}"
+    end
+
+    def timeout_protection_from_identity_server
+      yield
+    rescue Timeout::Error
+      Class.new do
+        def status
+          OpenID::FAILURE
+        end
+
+        def msg
+          "Identity server timed out"
+        end
+      end.new
+    end
+end