text: """
    Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
  
    Permission is hereby granted, free of charge, to any person obtaining a copy of this
    software and associated documentation files (the "Software"), to deal in the Software
    without restriction, including without limitation the rights to use, copy, modify,
    merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
    permit persons to whom the Software is furnished to do so.
  
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
    INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
    PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
    SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  """
  import datetime
  import json
  
  from cfnlint import CloudFormationLintRule
  from cfnlint import RuleMatch
  
  
  class Limits(CloudFormationLintRule):
      """Check if IAM limits are not breached"""
      id = 'E2508'
      shortdesc = 'Check IAM resource limits'
      description = 'See if IAM resources do not breach limits'
      source_url = 'https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cloudformation-limits.html'
      tags = ['resources', 'iam']
  
      def _serialize_date(self, obj):
          if isinstance(obj, datetime.date):
              return obj.isoformat()
          raise TypeError('Object of type {} is not JSON serializable'.format(obj.__class__.__name__))
  
      def check_managed_policy_arns(self, properties, path):
          """Check ManagedPolicyArns is within limits"""
          matches = list()
  
          if 'ManagedPolicyArns' not in properties:
              return matches
  
          if len(properties['ManagedPolicyArns']) > 10:
              matches.append(
                  RuleMatch(
                      path + ['ManagedPolicyArns'],
                      'IAM resources cannot have more than 10 ManagedPolicyArns',
                  )
              )
  
          return matches
  
      def check_instance_profile_roles(self, properties, path):
          """Check InstanceProfile.Roles is within limits"""
          matches = list()
  
          if 'Roles' not in properties:
              return matches
  
          if len(properties['Roles']) > 1:
              matches.append(
                  RuleMatch(
                      path + ['Roles'],
                      'InstanceProfile can only have one role attached'
                  )
              )
  
          return matches
  
      def check_user_groups(self, properties, path):
          """Check User.Groups is within limits"""
          matches = list()
  
          if 'Groups' not in properties:
              return matches
  
          if len(properties['Groups']) > 10:
              matches.append(
                  RuleMatch(
                      path + ['Groups'],
                      'User can be a member of maximum 10 groups',
                  )
              )
  
          return matches
  
      def check_role_assume_role_policy_document(self, properties, path):
          """Check Role.AssumeRolePolicyDocument is within limits"""
          matches = list()
  
          if 'AssumeRolePolicyDocument' not in properties:
              return matches
  
          if len(json.dumps(properties['AssumeRolePolicyDocument'], default=self._serialize_date)) > 2048:
              matches.append(
                  RuleMatch(
                      path + ['AssumeRolePolicyDocument'],
                      'Role trust policy JSON text cannot be longer than 2048 characters',
                  )
              )
  
          return matches
  
      def match(self, cfn):
          """Check that IAM resources are below limits"""
          matches = list()
          types = {
              'AWS::IAM::User': [
                  self.check_managed_policy_arns,
                  self.check_user_groups,
              ],
              'AWS::IAM::Group': [
                  self.check_managed_policy_arns,
              ],
              'AWS::IAM::Role': [
                  self.check_managed_policy_arns,
                  self.check_role_assume_role_policy_document,
              ],
              'AWS::IAM::InstanceProfile': [
                  self.check_instance_profile_roles,
              ],
          }
  
          for resource_type, check_list in types.items():
              resources = cfn.get_resources(resource_type=resource_type)
              for resource_name, resource_object in resources.items():
                  path = ['Resources', resource_name, 'Properties']
                  properties = resource_object.get('Properties', {})
                  for check in check_list:
                      matches.extend(check(properties, path))
  
          return matches
  