101 lines
2.8 KiB
Go
101 lines
2.8 KiB
Go
package middlewares
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import (
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"fmt"
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"github.com/sirupsen/logrus"
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"github.com/snyk/driftctl/pkg/resource"
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"github.com/snyk/driftctl/pkg/resource/aws"
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)
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// The role of this middleware is to expand policy contained in `managed_policy_arns` to dedicated `aws_iam_policy_attachment`
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// resources. Note that we do not use `aws_iam_role_policy_attachment` or `aws_iam_user_policy_attachment`
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// Once theses resources created, we remove the old `managed_policy_arns` field to avoid false positive drifts
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type AwsRoleManagedPolicyExpander struct {
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resourceFactory resource.ResourceFactory
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}
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func NewAwsRoleManagedPolicyExpander(resourceFactory resource.ResourceFactory) *AwsRoleManagedPolicyExpander {
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return &AwsRoleManagedPolicyExpander{resourceFactory: resourceFactory}
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}
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func (a AwsRoleManagedPolicyExpander) Execute(remoteResources, resourcesFromState *[]*resource.Resource) error {
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newList := make([]*resource.Resource, 0)
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for _, res := range *remoteResources {
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// Ignore all resources other than iam_role
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if res.ResourceType() != aws.AwsIamRoleResourceType {
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newList = append(newList, res)
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continue
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}
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res.Attributes().SafeDelete([]string{"managed_policy_arns"})
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newList = append(newList, res)
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}
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*remoteResources = newList
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newList = make([]*resource.Resource, 0)
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for _, res := range *resourcesFromState {
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// Ignore all resources other than iam_role
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if res.ResourceType() != aws.AwsIamRoleResourceType {
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newList = append(newList, res)
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continue
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}
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managedPolicyArns := res.Attributes().GetSlice("managed_policy_arns")
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// if managed_policy_arns does not exist or is empty ignore resource
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if managedPolicyArns == nil {
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newList = append(newList, res)
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continue
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}
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// Remove empty slices to match remote read results
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if len(managedPolicyArns) == 0 {
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res.Attributes().SafeDelete([]string{"managed_policy_arns"})
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newList = append(newList, res)
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continue
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}
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roleName := res.Attributes().GetString("name")
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for _, arn := range managedPolicyArns {
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arn := arn.(string)
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id := fmt.Sprintf("%s-%s", *roleName, arn)
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policyAttachmentData := resource.Attributes{
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"policy_arn": arn,
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"users": []interface{}{},
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"groups": []interface{}{},
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"roles": []interface{}{*roleName},
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}
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logrus.WithFields(logrus.Fields{
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"role": *roleName,
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"policy_arn": arn,
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}).Debug("Expanded managed_policy_arns from role")
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newRes := a.resourceFactory.CreateAbstractResource(aws.AwsIamPolicyAttachmentResourceType, id, policyAttachmentData)
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alreadyExist := false
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for _, resInState := range *resourcesFromState {
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if resInState.Equal(newRes) {
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alreadyExist = true
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break
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}
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}
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if !alreadyExist {
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newList = append(newList, newRes)
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}
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}
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res.Attributes().SafeDelete([]string{"managed_policy_arns"})
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newList = append(newList, res)
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}
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*resourcesFromState = newList
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return nil
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}
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