@aws-solutions-constructs/aws-cloudfront-s3
Version:
CDK Constructs for AWS Cloudfront to AWS S3 integration.
115 lines • 23.5 kB
JavaScript
"use strict";
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CloudFrontToS3 = void 0;
const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti");
/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance
* with the License. A copy of the License is located at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* or in the 'license' file accompanying this file. This file is distributed on an 'AS IS' BASIS, WITHOUT WARRANTIES
* OR CONDITIONS OF ANY KIND, express or implied. See the License for the specific language governing permissions
* and limitations under the License.
*/
const aws_cdk_lib_1 = require("aws-cdk-lib");
const iam = require("aws-cdk-lib/aws-iam");
const defaults = require("@aws-solutions-constructs/core");
const resources = require("@aws-solutions-constructs/resources");
// Note: To ensure CDKv2 compatibility, keep the import statement for Construct separate
const constructs_1 = require("constructs");
class CloudFrontToS3 extends constructs_1.Construct {
/**
* @summary Constructs a new instance of the CloudFrontToS3 class.
* @param {Construct} scope - represents the scope for all the resources.
* @param {string} id - this is a a scope-unique id.
* @param {CloudFrontToS3Props} props - user provided props for the construct
* @since 0.8.0
* @access public
*/
constructor(scope, id, props) {
super(scope, id);
// All our tests are based upon this behavior being on, so we're setting
// context here rather than assuming the client will set it
this.node.setContext("@aws-cdk/aws-s3:serverAccessLogsUseBucketPolicy", true);
defaults.CheckS3Props(props);
defaults.CheckCloudFrontProps(props);
defaults.CheckCloudfrontS3Props(props);
let originBucket;
if (!props.existingBucketObj) {
const buildS3BucketResponse = defaults.buildS3Bucket(this, {
bucketProps: props.bucketProps,
loggingBucketProps: props.loggingBucketProps,
logS3AccessLogs: props.logS3AccessLogs
});
this.s3Bucket = buildS3BucketResponse.bucket;
this.s3LoggingBucket = buildS3BucketResponse.loggingBucket;
originBucket = this.s3Bucket;
}
else {
originBucket = props.existingBucketObj;
}
this.s3BucketInterface = originBucket;
// Define the CloudFront Distribution
const cloudFrontDistributionForS3Props = {
sourceBucket: this.s3BucketInterface,
cloudFrontDistributionProps: props.cloudFrontDistributionProps,
httpSecurityHeaders: props.insertHttpSecurityHeaders,
cloudFrontLoggingBucketProps: props.cloudFrontLoggingBucketProps,
responseHeadersPolicyProps: props.responseHeadersPolicyProps,
cloudFrontLoggingBucketS3AccessLogBucketProps: props.cloudFrontLoggingBucketAccessLogBucketProps,
logCloudFrontAccessLog: props.logCloudFrontAccessLog
};
const cloudFrontDistributionForS3Response = defaults.createCloudFrontDistributionForS3(this, id, cloudFrontDistributionForS3Props);
this.cloudFrontWebDistribution = cloudFrontDistributionForS3Response.distribution;
this.cloudFrontFunction = cloudFrontDistributionForS3Response.cloudfrontFunction;
this.cloudFrontLoggingBucket = cloudFrontDistributionForS3Response.loggingBucket;
this.originAccessControl = cloudFrontDistributionForS3Response.originAccessControl;
this.cloudFrontLoggingBucketAccessLogBucket = cloudFrontDistributionForS3Response.loggingBucketS3AccesssLogBucket;
// Attach the OriginAccessControl to the CloudFront Distribution, and remove the OriginAccessIdentity
const l1CloudFrontDistribution = this.cloudFrontWebDistribution.node.defaultChild;
l1CloudFrontDistribution.addPropertyOverride('DistributionConfig.Origins.0.OriginAccessControlId', this.originAccessControl?.attrId);
if (props.originPath) {
l1CloudFrontDistribution.addPropertyOverride('DistributionConfig.Origins.0.OriginPath', props.originPath);
}
// Grant CloudFront permission to get the objects from the s3 bucket origin
originBucket.addToResourcePolicy(new iam.PolicyStatement({
effect: iam.Effect.ALLOW,
actions: ['s3:GetObject'],
principals: [new iam.ServicePrincipal('cloudfront.amazonaws.com')],
resources: [originBucket.arnForObjects('*')],
conditions: {
StringEquals: {
'AWS:SourceArn': `arn:${aws_cdk_lib_1.Aws.PARTITION}:cloudfront::${aws_cdk_lib_1.Aws.ACCOUNT_ID}:distribution/${this.cloudFrontWebDistribution.distributionId}`
}
}
}));
// We need to create a custom resource to introduce the indirection necessary to avoid
// a circular dependency when granting the CloudFront distribution access to use the
// KMS key to decrypt objects. Without this indirection, it is not possible to reference
// the CloudFront distribution ID in the KMS key policy because -
// * The S3 bucket references the KMS key
// * The CloudFront distribution references the bucket
// * The KMS key references the CloudFront distribution
let encryptionKey;
if (props.bucketProps && props.bucketProps.encryptionKey) {
encryptionKey = props.bucketProps.encryptionKey;
}
else if (props.existingBucketObj && props.existingBucketObj.encryptionKey) {
encryptionKey = props.existingBucketObj.encryptionKey;
}
if (encryptionKey) {
resources.createKeyPolicyUpdaterCustomResource(this, id, {
distribution: this.cloudFrontWebDistribution,
encryptionKey
});
}
}
}
exports.CloudFrontToS3 = CloudFrontToS3;
_a = JSII_RTTI_SYMBOL_1;
CloudFrontToS3[_a] = { fqn: "@aws-solutions-constructs/aws-cloudfront-s3.CloudFrontToS3", version: "2.85.4" };
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All Rights Reserved.\n *\n *  Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance\n *  with the License. A copy of the License is located at\n *\n *      http://www.apache.org/licenses/LICENSE-2.0\n *\n *  or in the 'license' file accompanying this file. This file is distributed on an 'AS IS' BASIS, WITHOUT WARRANTIES\n *  OR CONDITIONS OF ANY KIND, express or implied. See the License for the specific language governing permissions\n *  and limitations under the License.\n */\n\nimport { Aws } from 'aws-cdk-lib';\nimport * as cloudfront from 'aws-cdk-lib/aws-cloudfront';\nimport * as iam from 'aws-cdk-lib/aws-iam';\nimport * as kms from 'aws-cdk-lib/aws-kms';\nimport * as s3 from 'aws-cdk-lib/aws-s3';\nimport * as defaults from '@aws-solutions-constructs/core';\nimport * as resources from '@aws-solutions-constructs/resources';\n// Note: To ensure CDKv2 compatibility, keep the import statement for Construct separate\nimport { Construct } from 'constructs';\n\n/**\n * @summary The properties for the CloudFrontToS3 Construct\n */\nexport interface CloudFrontToS3Props {\n  /**\n   * Optional user provided props to override the default props\n   *\n   * @default - Default props are used\n   */\n  readonly cloudFrontDistributionProps?: cloudfront.DistributionProps | any,\n  /**\n   * Optional user provided props to turn on/off the automatic injection of best practice HTTP\n   * security headers in all responses from cloudfront.\n   * Turning this on will inject default headers and is mutually exclusive with passing custom security headers\n   * via the responseHeadersPolicyProps parameter.\n   *\n   * @default - true\n   */\n  readonly insertHttpSecurityHeaders?: boolean;\n  /**\n   * Optional user provided configuration that cloudfront applies to all http responses.\n   * Can be used to pass a custom ResponseSecurityHeadersBehavior, ResponseCustomHeadersBehavior or\n   * ResponseHeadersCorsBehavior to the cloudfront distribution.\n   *\n   * Passing a custom ResponseSecurityHeadersBehavior is mutually exclusive with turning on the default security headers\n   * via `insertHttpSecurityHeaders` prop. Will throw an error if both `insertHttpSecurityHeaders` is set to `true`\n   * and ResponseSecurityHeadersBehavior is passed.\n   *\n   * @default - undefined\n   */\n  readonly responseHeadersPolicyProps?: cloudfront.ResponseHeadersPolicyProps\n  /**\n   * Optional user provided props to provide an originPath that CloudFront appends to the\n   * origin domain name when CloudFront requests content from the origin.\n   * The string should start with a `/`, for example `/production`.\n   * @default = '/'\n   */\n  readonly originPath?: string,\n\n  // =====================\n  // S3 Content Bucket\n  // =====================\n  /**\n   * Existing instance of S3 Content Bucket object, providing both this and `bucketProps` will cause an error.\n   *\n   * @default - None\n   */\n  readonly existingBucketObj?: s3.IBucket,\n  /**\n   * Optional user provided props to override the default props for the S3 Content Bucket.\n   *\n   * @default - Default props are used\n   */\n  readonly bucketProps?: s3.BucketProps,\n\n  // =====================\n  // S3 Content Bucket Access Logs Bucket\n  // =====================\n  /**\n   * Optional - Whether to maintain access logs for the S3 Content bucket\n   *\n   * @default - true\n   */\n  readonly logS3AccessLogs?: boolean,\n  /**\n   * Optional user provided props to override the default props for the S3 Content Bucket Access Log Bucket.\n   *\n   * @default - Default props are used\n   */\n  readonly loggingBucketProps?: s3.BucketProps,\n\n  // =====================\n  // CloudFront Log Bucket\n  // =====================\n  /**\n   * Optional user provided props to override the default props for the CloudFront Log Bucket.\n   *\n   * @default - Default props are used\n   */\n  readonly cloudFrontLoggingBucketProps?: s3.BucketProps,\n\n  // =====================\n  // CloudFront Logs Bucket Access Log Bucket\n  // =====================\n  /**\n   * Optional - Whether to maintain access logs for the CloudFront Logging bucket. Specifying false for this\n   * while providing info about the log bucket will cause an error.\n   *\n   * @default - true\n   */\n  readonly logCloudFrontAccessLog?: boolean,\n  /**\n   * Optional user provided props to override the default props for the CloudFront Log Bucket Access Log bucket.\n   * Providing both this and `existingcloudFrontLoggingBucketAccessLogBucket` will cause an error\n   *\n   * @default - Default props are used\n   */\n  readonly cloudFrontLoggingBucketAccessLogBucketProps?: s3.BucketProps,\n}\n\nexport class CloudFrontToS3 extends Construct {\n  public readonly cloudFrontWebDistribution: cloudfront.Distribution;\n  public readonly cloudFrontFunction?: cloudfront.Function;\n  public readonly cloudFrontLoggingBucket?: s3.Bucket;\n  public readonly cloudFrontLoggingBucketAccessLogBucket?: s3.Bucket;\n  public readonly s3BucketInterface: s3.IBucket;\n  public readonly s3Bucket?: s3.Bucket;\n  public readonly s3LoggingBucket?: s3.Bucket;\n  public readonly originAccessControl?: cloudfront.CfnOriginAccessControl;\n\n  /**\n   * @summary Constructs a new instance of the CloudFrontToS3 class.\n   * @param {Construct} scope - represents the scope for all the resources.\n   * @param {string} id - this is a a scope-unique id.\n   * @param {CloudFrontToS3Props} props - user provided props for the construct\n   * @since 0.8.0\n   * @access public\n   */\n  constructor(scope: Construct, id: string, props: CloudFrontToS3Props) {\n    super(scope, id);\n\n    // All our tests are based upon this behavior being on, so we're setting\n    // context here rather than assuming the client will set it\n    this.node.setContext(\"@aws-cdk/aws-s3:serverAccessLogsUseBucketPolicy\", true);\n\n    defaults.CheckS3Props(props);\n    defaults.CheckCloudFrontProps(props);\n    defaults.CheckCloudfrontS3Props(props);\n\n    let originBucket: s3.IBucket;\n\n    if (!props.existingBucketObj) {\n      const buildS3BucketResponse = defaults.buildS3Bucket(this, {\n        bucketProps: props.bucketProps,\n        loggingBucketProps: props.loggingBucketProps,\n        logS3AccessLogs: props.logS3AccessLogs\n      });\n      this.s3Bucket = buildS3BucketResponse.bucket;\n      this.s3LoggingBucket = buildS3BucketResponse.loggingBucket;\n      originBucket = this.s3Bucket;\n    } else {\n      originBucket = props.existingBucketObj;\n    }\n\n    this.s3BucketInterface = originBucket;\n\n    // Define the CloudFront Distribution\n    const cloudFrontDistributionForS3Props: defaults.CreateCloudFrontDistributionForS3Props = {\n      sourceBucket: this.s3BucketInterface,\n      cloudFrontDistributionProps: props.cloudFrontDistributionProps,\n      httpSecurityHeaders: props.insertHttpSecurityHeaders,\n      cloudFrontLoggingBucketProps: props.cloudFrontLoggingBucketProps,\n      responseHeadersPolicyProps: props.responseHeadersPolicyProps,\n      cloudFrontLoggingBucketS3AccessLogBucketProps: props.cloudFrontLoggingBucketAccessLogBucketProps,\n      logCloudFrontAccessLog: props.logCloudFrontAccessLog\n    };\n    const cloudFrontDistributionForS3Response = defaults.createCloudFrontDistributionForS3(this, id, cloudFrontDistributionForS3Props);\n    this.cloudFrontWebDistribution = cloudFrontDistributionForS3Response.distribution;\n    this.cloudFrontFunction = cloudFrontDistributionForS3Response.cloudfrontFunction;\n    this.cloudFrontLoggingBucket = cloudFrontDistributionForS3Response.loggingBucket;\n    this.originAccessControl = cloudFrontDistributionForS3Response.originAccessControl;\n    this.cloudFrontLoggingBucketAccessLogBucket = cloudFrontDistributionForS3Response.loggingBucketS3AccesssLogBucket;\n\n    // Attach the OriginAccessControl to the CloudFront Distribution, and remove the OriginAccessIdentity\n    const l1CloudFrontDistribution = this.cloudFrontWebDistribution.node.defaultChild as cloudfront.CfnDistribution;\n    l1CloudFrontDistribution.addPropertyOverride('DistributionConfig.Origins.0.OriginAccessControlId', this.originAccessControl?.attrId);\n    if (props.originPath) {\n      l1CloudFrontDistribution.addPropertyOverride('DistributionConfig.Origins.0.OriginPath', props.originPath);\n    }\n\n    // Grant CloudFront permission to get the objects from the s3 bucket origin\n    originBucket.addToResourcePolicy(\n      new iam.PolicyStatement({\n        effect: iam.Effect.ALLOW,\n        actions: ['s3:GetObject'],\n        principals: [new iam.ServicePrincipal('cloudfront.amazonaws.com')],\n        resources: [originBucket.arnForObjects('*')],\n        conditions: {\n          StringEquals: {\n            'AWS:SourceArn': `arn:${Aws.PARTITION}:cloudfront::${Aws.ACCOUNT_ID}:distribution/${this.cloudFrontWebDistribution.distributionId}`\n          }\n        }\n      })\n    );\n\n    // We need to create a custom resource to introduce the indirection necessary to avoid\n    // a circular dependency when granting the CloudFront distribution access to use the\n    // KMS key to decrypt objects. Without this indirection, it is not possible to reference\n    // the CloudFront distribution ID in the KMS key policy because -\n    //   * The S3 bucket references the KMS key\n    //   * The CloudFront distribution references the bucket\n    //   * The KMS key references the CloudFront distribution\n    let encryptionKey: kms.IKey | undefined;\n    if (props.bucketProps && props.bucketProps.encryptionKey) {\n      encryptionKey = props.bucketProps.encryptionKey;\n    } else if (props.existingBucketObj && props.existingBucketObj.encryptionKey) {\n      encryptionKey = props.existingBucketObj.encryptionKey;\n    }\n\n    if (encryptionKey) {\n      resources.createKeyPolicyUpdaterCustomResource(this, id,  {\n        distribution: this.cloudFrontWebDistribution,\n        encryptionKey\n      });\n    }\n  }\n}"]}