File: authorize_security_group_ingress.rb

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module Fog
  module AWS
    class Compute
      class Real
        require 'fog/aws/parsers/compute/basic'

        # Add permissions to a security group
        #
        # ==== Parameters
        # * group_name<~String> - Name of group, optional (can also be specifed as GroupName in options)
        # * options<~Hash>:
        #   * 'GroupName'<~String> - Name of security group to modify
        #   * 'GroupId'<~String> - Id of security group to modify
        #   * 'SourceSecurityGroupName'<~String> - Name of security group to authorize
        #   * 'SourceSecurityGroupOwnerId'<~String> - Name of owner to authorize
        #   or
        #   * 'CidrIp'<~String> - CIDR range
        #   * 'FromPort'<~Integer> - Start of port range (or -1 for ICMP wildcard)
        #   * 'IpProtocol'<~String> - Ip protocol, must be in ['tcp', 'udp', 'icmp']
        #   * 'ToPort'<~Integer> - End of port range (or -1 for ICMP wildcard)
        #   or
        #   * 'IpPermissions'<~Array>:
        #     * permission<~Hash>:
        #       * 'FromPort'<~Integer> - Start of port range (or -1 for ICMP wildcard)
        #       * 'Groups'<~Array>:
        #         * group<~Hash>:
        #           * 'GroupName'<~String> - Name of security group to authorize
        #           * 'UserId'<~String> - Name of owner to authorize
        #       * 'IpProtocol'<~String> - Ip protocol, must be in ['tcp', 'udp', 'icmp']
        #       * 'IpRanges'<~Array>:
        #         * ip_range<~Hash>:
        #           * 'CidrIp'<~String> - CIDR range
        #       * 'Ipv6Ranges'<~Array>:
        #         * ip_range<~Hash>:
        #           * 'CidrIpv6'<~String> - CIDR range
        #       * 'ToPort'<~Integer> - End of port range (or -1 for ICMP wildcard)
        #
        # === Returns
        # * response<~Excon::Response>:
        #   * body<~Hash>:
        #     * 'requestId'<~String> - Id of request
        #     * 'return'<~Boolean> - success?
        #
        # {Amazon API Reference}[http://docs.amazonwebservices.com/AWSEC2/latest/APIReference/ApiReference-query-AuthorizeSecurityGroupIngress.html]
        def authorize_security_group_ingress(group_name, options = {})
          options = Fog::AWS.parse_security_group_options(group_name, options)

          if ip_permissions = options.delete('IpPermissions')
            options.merge!(indexed_ip_permissions_params(ip_permissions))
          end

          request({
            'Action'    => 'AuthorizeSecurityGroupIngress',
            :idempotent => true,
            :parser     => Fog::Parsers::AWS::Compute::Basic.new
          }.merge!(options))
        end

        private

        def indexed_ip_permissions_params(ip_permissions)
          params = {}
          ip_permissions.each_with_index do |permission, key_index|
            key_index += 1
            params[format('IpPermissions.%d.IpProtocol', key_index)] = permission['IpProtocol']
            params[format('IpPermissions.%d.FromPort', key_index)] = permission['FromPort']
            params[format('IpPermissions.%d.ToPort', key_index)] = permission['ToPort']
            (permission['Groups'] || []).each_with_index do |group, group_index|
              group_index += 1
              params[format('IpPermissions.%d.Groups.%d.UserId', key_index, group_index)] = group['UserId']
              params[format('IpPermissions.%d.Groups.%d.GroupName', key_index, group_index)] = group['GroupName']
              params[format('IpPermissions.%d.Groups.%d.GroupId', key_index, group_index)] = group['GroupId']
            end
            (permission['IpRanges'] || []).each_with_index do |ip_range, range_index|
              range_index += 1
              params[format('IpPermissions.%d.IpRanges.%d.CidrIp', key_index, range_index)] = ip_range['CidrIp']
            end
            (permission['Ipv6Ranges'] || []).each_with_index do |ip_range, range_index|
              range_index += 1
              params[format('IpPermissions.%d.Ipv6Ranges.%d.CidrIpv6', key_index, range_index)] = ip_range['CidrIpv6']
            end
          end
          params.reject {|k, v| v.nil? }
        end
      end

      class Mock
        def authorize_security_group_ingress(group_name, options = {})
          options = Fog::AWS.parse_security_group_options(group_name, options)

          group = if options.key?('GroupName')
                    self.data[:security_groups].values.find { |v| v['groupName'] == options['GroupName'] }
                  else
                    self.data[:security_groups][options.fetch('GroupId')]
                  end

          response = Excon::Response.new
          group ||
            raise(Fog::AWS::Compute::NotFound.new("The security group '#{group_name}' does not exist"))

          verify_permission_options(options, group['vpcId'] != nil)

          normalized_permissions = normalize_permissions(options)

          normalized_permissions.each do |permission|
            if matching_group_permission = find_matching_permission(group, permission)
              if permission['groups'].any? {|pg| matching_group_permission['groups'].include?(pg) }
                raise Fog::AWS::Compute::Error, "InvalidPermission.Duplicate => The permission '123' has already been authorized in the specified group"
              end

              if permission['ipRanges'].any? {|pr| matching_group_permission['ipRanges'].include?(pr) }
                raise Fog::AWS::Compute::Error, "InvalidPermission.Duplicate => The permission '123' has already been authorized in the specified group"
              end
            end
          end

          normalized_permissions.each do |permission|
            if matching_group_permission = find_matching_permission(group, permission)
              matching_group_permission['groups'] += permission['groups']
              matching_group_permission['ipRanges'] += permission['ipRanges']
            else
              group['ipPermissions'] << permission
            end
          end

          response.status = 200
          response.body = {
            'requestId' => Fog::AWS::Mock.request_id,
            'return'    => true
          }
          response
        end

        private

        def verify_permission_options(options, is_vpc)
          if options.size <= 1
            raise Fog::AWS::Compute::Error.new("InvalidRequest => The request received was invalid.")
          end
          if !is_vpc && options['IpProtocol'] && !['tcp', 'udp', 'icmp'].include?(options['IpProtocol'])
            raise Fog::AWS::Compute::Error.new("InvalidPermission.Malformed => Unsupported IP protocol \"#{options['IpProtocol']}\"  - supported: [tcp, udp, icmp]")
          end
          if !is_vpc && (options['IpProtocol'] && (!options['FromPort'] || !options['ToPort']))
            raise Fog::AWS::Compute::Error.new("InvalidPermission.Malformed => TCP/UDP port (-1) out of range")
          end
          if options.key?('IpPermissions')
            if !options['IpPermissions'].is_a?(Array) || options['IpPermissions'].empty?
              raise Fog::AWS::Compute::Error.new("InvalidRequest => The request received was invalid.")
            end
            options['IpPermissions'].each {|p| verify_permission_options(p, is_vpc) }
          end
        end

        def normalize_permissions(options)
          normalized_permissions = []
          if options['SourceSecurityGroupName']
            group_name = if options['SourceSecurityGroupName'] =~ /default_elb/
                           "default"
                         else
                           options['SourceSecurityGroupName']
                         end
            source_group_id, _ = self.data[:security_groups].find { |_,v| v['groupName'] == group_name }

            ['tcp', 'udp'].each do |protocol|
              normalized_permissions << {
                'ipProtocol' => protocol,
                'fromPort'   => 1,
                'toPort'     => 65535,
                'groups'     => [{
                  'groupName' => group_name,
                  'userId'    => options['SourceSecurityGroupOwnerId'] || self.data[:owner_id],
                  'groupId'   => source_group_id
                }],
                'ipRanges'   => []
              }
            end
            normalized_permissions << {
              'ipProtocol' => 'icmp',
              'fromPort'   => -1,
              'toPort'     => -1,
              'groups'     => [{
                'groupName' => group_name,
                'userId'    => options['SourceSecurityGroupOwnerId'] || self.data[:owner_id],
                'groupId'   => source_group_id
              }],
              'ipRanges' => []
            }
          elsif options['CidrIp']
            normalized_permissions << {
              'ipProtocol' => options['IpProtocol'],
              'fromPort'   => Integer(options['FromPort']),
              'toPort'     => Integer(options['ToPort']),
              'groups'     => [],
              'ipRanges'   => [{'cidrIp' => options['CidrIp']}]
            }
          elsif options['CidrIpv6']
            normalized_permissions << {
              'ipProtocol' => options['IpProtocol'],
              'fromPort'   => Integer(options['FromPort']),
              'toPort'     => Integer(options['ToPort']),
              'groups'     => [],
              'ipv6Ranges' => [{'cidrIpv6' => options['CidrIpv6']}]
            }
          elsif options['IpPermissions']
            options['IpPermissions'].each do |permission|

              groups = (permission['Groups'] || []).map do |authorized_group|
                security_group = if group_name = authorized_group['GroupName']
                                   self.data[:security_groups].values.find { |sg| sg['groupName'] == group_name }
                                 elsif group_id = authorized_group['GroupId']
                                   self.data[:security_groups][group_id]
                                 end
                security_group ||
                  raise(Fog::AWS::Compute::NotFound.new("The security group '#{group_name || group_id}' does not exist"))

                {
                  'groupName' => authorized_group['GroupName'] || security_group['groupName'],
                  'userId'    => authorized_group['UserId']    || self.data[:owner_id],
                  'groupId'   => authorized_group["GroupId"]   || security_group['groupId']
                }
              end


              if ['tcp', 'udp', 'icmp'].include?(permission['IpProtocol'])
                normalized_permissions << {
                  'ipProtocol' => permission['IpProtocol'],
                  'fromPort'   => Integer(permission['FromPort']),
                  'toPort'     => Integer(permission['ToPort']),
                  'groups'     => groups,
                  'ipRanges'   => (permission['IpRanges'] || []).map {|r| { 'cidrIp' => r['CidrIp'] } }
                }
              else
                normalized_permissions << {
                  'ipProtocol' => permission['IpProtocol'],
                  'groups'     => groups,
                  'ipRanges'   => (permission['IpRanges'] || []).map {|r| { 'cidrIp' => r['CidrIp'] } }
                }
              end
            end
          end

          normalized_permissions
        end

        def find_matching_permission(group, permission)
          group['ipPermissions'].find {|group_permission|
            permission['ipProtocol'] == group_permission['ipProtocol'] &&
              permission['fromPort'] == group_permission['fromPort'] &&
              permission['toPort'] == group_permission['toPort'] }
        end
      end
    end
  end
end