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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| /* | ||
| Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| SPDX-License-Identifier: Apache-2.0 | ||
| */ | ||
| import { parse } from 'path'; | ||
| import { CfnResource, Stack } from 'aws-cdk-lib'; | ||
| import { | ||
| CfnAutoScalingGroup, | ||
| CfnLaunchConfiguration, | ||
| } from 'aws-cdk-lib/aws-autoscaling'; | ||
| import { CfnInstance, CfnLaunchTemplate } from 'aws-cdk-lib/aws-ec2'; | ||
| import { NagRuleCompliance, NagRules } from '../../nag-rules'; | ||
|
|
||
| /** | ||
| * The EC2 Instance requires IMDsv2 | ||
| * @param node the CfnResource to check | ||
| */ | ||
| export default Object.defineProperty( | ||
| (node: CfnResource): NagRuleCompliance => { | ||
| if (node instanceof CfnInstance) { | ||
| if (node.launchTemplate === undefined) { | ||
| return NagRuleCompliance.NON_COMPLIANT; | ||
| } | ||
| const instanceLaunchTemplate = Stack.of(node).resolve( | ||
| node.launchTemplate | ||
| ); | ||
| for (const child of Stack.of(node).node.findAll()) { | ||
| if (child instanceof CfnLaunchTemplate) { | ||
| if ( | ||
| isMatchingLaunchTemplate( | ||
| child, | ||
| instanceLaunchTemplate.launchTemplateName, | ||
| instanceLaunchTemplate.launchTemplateId | ||
| ) | ||
| ) { | ||
| return hasHttpTokens(child) | ||
| ? NagRuleCompliance.COMPLIANT | ||
| : NagRuleCompliance.NON_COMPLIANT; | ||
| } | ||
| } | ||
| } | ||
| return NagRuleCompliance.NON_COMPLIANT; | ||
| } else if (node instanceof CfnAutoScalingGroup) { | ||
| if (node.launchTemplate) { | ||
| const nodeLaunchTemplate = Stack.of(node).resolve(node.launchTemplate); | ||
| for (const child of Stack.of(node).node.findAll()) { | ||
| if (child instanceof CfnLaunchTemplate) { | ||
| if ( | ||
| isMatchingLaunchTemplate( | ||
| child, | ||
| nodeLaunchTemplate.launchTemplateName, | ||
| nodeLaunchTemplate.launchTemplateId | ||
| ) | ||
| ) { | ||
| return hasHttpTokens(child) | ||
| ? NagRuleCompliance.COMPLIANT | ||
| : NagRuleCompliance.NON_COMPLIANT; | ||
| } | ||
| } | ||
| } | ||
| } else if (node.launchConfigurationName) { | ||
| for (const child of Stack.of(node).node.findAll()) { | ||
| if (child instanceof CfnLaunchConfiguration) { | ||
| if ( | ||
| isMatchingLaunchConfiguration(child, node.launchConfigurationName) | ||
| ) { | ||
| return hasHttpTokens(child) | ||
| ? NagRuleCompliance.COMPLIANT | ||
| : NagRuleCompliance.NON_COMPLIANT; | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return NagRuleCompliance.NON_COMPLIANT; | ||
| } else { | ||
| return NagRuleCompliance.NOT_APPLICABLE; | ||
| } | ||
| }, | ||
| 'name', | ||
| { value: parse(__filename).name } | ||
| ); | ||
|
|
||
| function isMatchingLaunchTemplate( | ||
| node: CfnLaunchTemplate, | ||
| launchTemplateName?: string | undefined, | ||
| launchTemplateId?: string | undefined | ||
| ): boolean { | ||
| return ( | ||
| launchTemplateName === node.launchTemplateName || | ||
| launchTemplateId === NagRules.resolveResourceFromInstrinsic(node, node.ref) | ||
| ); | ||
| } | ||
|
|
||
| function isMatchingLaunchConfiguration( | ||
| node: CfnLaunchConfiguration, | ||
| launchConfigurationName?: string | undefined | ||
| ): boolean { | ||
| return ( | ||
| launchConfigurationName === node.launchConfigurationName || | ||
| NagRules.resolveResourceFromInstrinsic(node, launchConfigurationName) === | ||
| NagRules.resolveResourceFromInstrinsic(node, node.ref) | ||
| ); | ||
| } | ||
|
|
||
| function hasHttpTokens( | ||
| node: CfnLaunchTemplate | CfnLaunchConfiguration | ||
| ): boolean { | ||
| let meta; | ||
| if (node instanceof CfnLaunchTemplate) { | ||
| const launchTemplateData = Stack.of(node).resolve(node.launchTemplateData); | ||
| meta = Stack.of(node).resolve( | ||
| launchTemplateData.metadataOptions | ||
| ) as CfnLaunchTemplate.MetadataOptionsProperty; | ||
| } else if (node instanceof CfnLaunchConfiguration) { | ||
| meta = Stack.of(node).resolve( | ||
| node.metadataOptions | ||
| ) as CfnLaunchConfiguration.MetadataOptionsProperty; | ||
| } | ||
| return meta?.httpTokens === 'required'; | ||
| } |
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