AWSTemplateFormatVersion: "2010-09-09"
Description: >
  This CloudFormation template creates a role assumed by CloudFormation
  during CRUDL operations to mutate resources on behalf of the customer.

Resources:
  ExecutionRole:
    Type: AWS::IAM::Role
    Properties:
      MaxSessionDuration: 8400
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              Service: resources.cloudformation.amazonaws.com
            Action: sts:AssumeRole
      Path: "/"
      Policies:
        - PolicyName: ResourceTypePolicy
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
              - Effect: Allow
                Action:
                - "iam:GetRole"
                - "iot:CreateRoleAlias"
                - "iot:DeleteRoleAlias"
                - "iot:DescribeRoleAlias"
                - "iot:ListRoleAliases"
                - "iot:UpdateRoleAlias"
                - "cloudformation:ListExports"
                Resource: "*"
              - Effect: Allow
                Action:
                - "iam:PassRole"
                Resource: "*"
                Condition:
                  StringEquals:
                    "iam:PassedToService":
                    - "iot.amazonaws.com"
Outputs:
  ExecutionRoleArn:
    Value:
      Fn::GetAtt: ExecutionRole.Arn