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# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: MIT-0
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AWSTemplateFormatVersion: 2010-09-09
Description:
  This template creates an IAM role to configure the delegated administrator account - 'guardduty_org' solution in the repo,
  https://github.com/aws-samples/aws-security-reference-architecture-examples (sra-1ssgnse4k)

Metadata:
  SRA:
    Version: 1.1
    Order: 3
  AWS::CloudFormation::Interface:
    ParameterGroups:
      - Label:
          default: General Properties
        Parameters:
          - pSRASolutionName

      - Label:
          default: Role Properties
        Parameters:
          - pGuardDutyOrgConfigurationRoleName
          - pManagementAccountId
          - pGuardDutyOrgLambdaRoleName

    ParameterLabels:
      pGuardDutyOrgConfigurationRoleName:
        default: GuardDuty Configuration Role Name
      pManagementAccountId:
        default: Organization Management Account ID
      pGuardDutyOrgLambdaRoleName:
        default: Lambda Role Name
      pSRASolutionName:
        default: SRA Solution Name

Parameters:
  pGuardDutyOrgConfigurationRoleName:
    AllowedPattern: '^[\w+=,.@-]{1,64}$'
    ConstraintDescription: Max 64 alphanumeric characters. Also special characters supported [+, =, ., @, -]
    Default: sra-guardduty-org-configuration
    Description: GuardDuty Configuration IAM Role Name
    Type: String
  pManagementAccountId:
    AllowedPattern: '^\d{12}$'
    ConstraintDescription: Must be 12 digits
    Description: Organization Management Account ID
    Type: String
  pGuardDutyOrgLambdaRoleName:
    AllowedPattern: '^[\w+=,.@-]{1,64}$'
    ConstraintDescription: Max 64 alphanumeric characters. Also special characters supported [+, =, ., @, -]
    Default: sra-guardduty-org-lambda
    Description: Lambda Role Name
    Type: String
  pSRASolutionName:
    AllowedValues: [sra-guardduty-org]
    Default: sra-guardduty-org
    Description: The SRA solution name. The default value is the folder name of the solution
    Type: String

Resources:
  rConfigurationRole:
    Type: AWS::IAM::Role
    Metadata:
      cfn_nag:
        rules_to_suppress:
          - id: W11
            reason: Actions require * in resource
          - id: W28
            reason: Explicit role name provided
      checkov:
        skip:
          - id: CKV_AWS_111
            comment: IAM write actions require wildcard in resource
    Properties:
      RoleName: !Ref pGuardDutyOrgConfigurationRoleName
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Action: sts:AssumeRole
            Condition:
              StringEquals:
                aws:PrincipalArn:
                  - !Sub arn:${AWS::Partition}:iam::${pManagementAccountId}:role/${pGuardDutyOrgLambdaRoleName}
            Principal:
              AWS:
                - !Sub arn:${AWS::Partition}:iam::${pManagementAccountId}:root
      Path: '/'
      Policies:
        - PolicyName: sra-guardduty-org-policy-organizations
          PolicyDocument:
            Version: 2012-10-17
            Statement:
              - Sid: OrganizationsListAccounts
                Effect: Allow
                Action: organizations:ListAccounts
                Resource: '*'

        - PolicyName: sra-guardduty-org-policy-guardduty
          PolicyDocument:
            Version: 2012-10-17
            Statement:
              - Sid: GuardDutyNoResource
                Effect: Allow
                Action: guardduty:ListDetectors
                Resource: '*'

              - Sid: GuardDutyWithResource
                Effect: Allow
                Action:
                  - guardduty:CreateMembers
                  - guardduty:CreatePublishingDestination
                  - guardduty:DeleteDetector
                  - guardduty:DeleteMembers
                  - guardduty:DisassociateMembers
                  - guardduty:ListMembers
                  - guardduty:ListPublishingDestinations
                  - guardduty:UpdateDetector
                  - guardduty:UpdateMemberDetectors
                  - guardduty:UpdateOrganizationConfiguration
                  - guardduty:UpdatePublishingDestination
                Resource:
                  - !Sub arn:${AWS::Partition}:guardduty:*:${AWS::AccountId}:/detector/*
                  - !Sub arn:${AWS::Partition}:guardduty:*:${AWS::AccountId}:detector/*

        - PolicyName: sra-guardduty-org-policy-iam
          PolicyDocument:
            Version: 2012-10-17
            Statement:
              - Sid: AllowReadIamActions
                Effect: Allow
                Action: iam:GetRole
                Resource: !Sub arn:${AWS::Partition}:iam::${AWS::AccountId}:role/*

              - Sid: AllowCreateDeleteServiceLinkedRole
                Effect: Allow
                Action:
                  - iam:CreateServiceLinkedRole
                  - iam:DeleteServiceLinkedRole
                Condition:
                  StringLike:
                    iam:AWSServiceName:
                      - guardduty.amazonaws.com
                      - malware-protection.guardduty.amazonaws.com
                Resource:
                  - !Sub arn:${AWS::Partition}:iam::${AWS::AccountId}:role/aws-service-role/guardduty.amazonaws.com/AWSServiceRoleForAmazonGuardDuty
                  - !Sub arn:${AWS::Partition}:iam::${AWS::AccountId}:role/aws-service-role/malware-protection.guardduty.amazonaws.com/AWSServiceRoleForAmazonGuardDutyMalwareProtection

              - Sid: AllowPolicyActions
                Effect: Allow
                Action:
                  - iam:DeleteRolePolicy
                  - iam:PutRolePolicy
                Resource:
                  - !Sub arn:${AWS::Partition}:iam::${AWS::AccountId}:role/aws-service-role/guardduty.amazonaws.com/AWSServiceRoleForAmazonGuardDuty
                  - !Sub arn:${AWS::Partition}:iam::${AWS::AccountId}:role/aws-service-role/malware-protection.guardduty.amazonaws.com/AWSServiceRoleForAmazonGuardDutyMalwareProtection

              - Sid: AllowEnableMalwareProtection
                Effect: Allow
                Action:
                  - organizations:EnableAWSServiceAccess
                  - organizations:RegisterDelegatedAdministrator
                  - organizations:ListDelegatedAdministrators
                  - organizations:ListAWSServiceAccessForOrganization
                  - organizations:DescribeOrganizationalUnit
                  - organizations:DescribeAccount
                  - organizations:DescribeOrganization
                Resource: '*'

              - Sid: AllowGetRoleMalwareProtection
                Effect: Allow
                Action:
                  - iam:GetRole
                Resource: !Sub arn:${AWS::Partition}:iam::${AWS::AccountId}:role/aws-service-role/malware-protection.guardduty.amazonaws.com/AWSServiceRoleForAmazonGuardDutyMalwareProtection

      Tags:
        - Key: sra-solution
          Value: !Ref pSRASolutionName