@renovosolutions/cdk-library-crowdstrike-ingestion
Version:
A CDK library to ease repetetive construct creation for CrowdStrike data ingestion
157 lines • 25.6 kB
JavaScript
"use strict";
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.CrowdStrikeBucket = void 0;
const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti");
const aws_cdk_lib_1 = require("aws-cdk-lib");
;
/**
* A construct that creates an S3 bucket for CrowdStrike data ingestion,
* along with an SQS queue for notifications, an IAM role for access,
* and optionally a KMS key for encryption.
*/
class CrowdStrikeBucket extends aws_cdk_lib_1.aws_s3.Bucket {
/**
* Constructs a new CrowdStrikeBucket.
*
* @param scope The scope in which this construct is defined.
* @param id The scoped construct ID.
* @param props The properties for the bucket, queue, role, and optional KMS key.
*/
constructor(scope, id, props) {
super(scope, id, {
encryption: aws_cdk_lib_1.aws_s3.BucketEncryption.S3_MANAGED,
blockPublicAccess: aws_cdk_lib_1.aws_s3.BlockPublicAccess.BLOCK_ALL,
enforceSSL: true,
versioned: true,
removalPolicy: aws_cdk_lib_1.RemovalPolicy.RETAIN_ON_UPDATE_OR_DELETE,
...props,
});
/**
* If we have an orgId, grant bucket write access to all accounts in the organization.
* This is useful for allowing multiple accounts in an organization to write to the same bucket.
*/
if (props.orgId) {
this.grantWrite(new aws_cdk_lib_1.aws_iam.OrganizationPrincipal(props.orgId));
}
// If a logging bucket source name is provided, add a policy to allow that bucket to write logs to this bucket.
if (props.loggingBucketSourceName) {
this.addToResourcePolicy(new aws_cdk_lib_1.aws_iam.PolicyStatement({
effect: aws_cdk_lib_1.aws_iam.Effect.ALLOW,
actions: ['s3:PutObject'],
resources: [this.arnForObjects('*')],
principals: [new aws_cdk_lib_1.aws_iam.ServicePrincipal('logging.s3.amazonaws.com')],
conditions: {
ArnLike: {
'aws:SourceArn': `arn:aws:s3:::${props.loggingBucketSourceName}`,
},
StringEquals: {
'aws:SourceAccount': aws_cdk_lib_1.Stack.of(this).account,
},
},
}));
}
/**
* Create an SQS queue for notifications.
* If a queueName is provided, use it; otherwise, generate a default name based on the bucket name.
*/
this.queue = new aws_cdk_lib_1.aws_sqs.Queue(this, 'Queue', {
queueName: props.queueProps?.queueName || `${this.bucketName}-queue`,
enforceSSL: true,
deadLetterQueue: {
maxReceiveCount: 5,
queue: new aws_cdk_lib_1.aws_sqs.Queue(this, 'DLQ', {
queueName: `${this.bucketName}-dlq`,
enforceSSL: true,
}),
},
...props.queueProps,
});
// Add a notification for bucket object creation events to the SQS queue.
this.addEventNotification(aws_cdk_lib_1.aws_s3.EventType.OBJECT_CREATED, new aws_cdk_lib_1.aws_s3_notifications.SqsDestination(this.queue));
/**
* Determine the principal for CrowdStrike.
* If roleProps are provided, use the assumedBy property from there.
* Otherwise, create a CrowdStrike principal using the role ARN and external ID from SSM parameters.
*/
let crowdStrikePrincipal;
if (props.roleProps) {
crowdStrikePrincipal = props.roleProps.assumedBy;
}
else if (props.crowdStrikeRoleArn && props.crowdStrikeExternalIdParameterArn) {
const crowdStrikeRoleArn = props.crowdStrikeRoleArn;
const crowdStrikeExternalId = aws_cdk_lib_1.aws_ssm.StringParameter.fromStringParameterArn(this, 'CrowdStrikeExternalIdParam', props.crowdStrikeExternalIdParameterArn).stringValue;
crowdStrikePrincipal = new aws_cdk_lib_1.aws_iam.PrincipalWithConditions(new aws_cdk_lib_1.aws_iam.ArnPrincipal(crowdStrikeRoleArn), {
StringEquals: {
'sts:ExternalId': crowdStrikeExternalId,
},
});
}
else {
aws_cdk_lib_1.Annotations.of(this).addError('Either roleProps or both crowdStrikeRoleParameterArn and crowdStrikeExternalIdParameterArn must be provided.');
// This will not be used because of the error, but we need to initialize it to satisfy the type.
crowdStrikePrincipal = new aws_cdk_lib_1.aws_iam.AnyPrincipal();
}
/**
* Create an IAM role for CrowdStrike to assume, granting it access to the resources created in this construct.
* The role name can be provided in the props, or a default name will be generated based on the bucket name.
*/
this.role = new aws_cdk_lib_1.aws_iam.Role(this, 'Role', {
roleName: props.roleProps?.roleName || `${this.bucketName}-role`,
assumedBy: crowdStrikePrincipal,
...props.roleProps,
});
// Grant the role permissions to read from the bucket and consume messages from the SQS queue.
this.grantRead(this.role);
this.queue.grantConsumeMessages(this.role);
// If createKmsKey is true, create a KMS key for the data.
if (props.createKmsKey) {
this.key = new aws_cdk_lib_1.aws_kms.Key(this, 'Key', {
alias: `alias/${this.bucketName}`,
removalPolicy: aws_cdk_lib_1.RemovalPolicy.RETAIN_ON_UPDATE_OR_DELETE,
enableKeyRotation: false,
multiRegion: true,
description: `KMS Key for CrowdStrike ingestion bucket ${this.bucketName}`,
...props.keyProps,
});
// Grant the role permissions to use the KMS key for decryption.
this.key.grantDecrypt(this.role);
/**
* If an orgId is provided, grant permissions to use the KMS key
* for encryption and decryption for all accounts in the organization.
*/
if (props.orgId) {
this.key.grantEncryptDecrypt(new aws_cdk_lib_1.aws_iam.OrganizationPrincipal(props.orgId));
}
// Output the KMS key ARN for reference.
new aws_cdk_lib_1.CfnOutput(this, 'KmsKeyArn', {
value: this.key.keyArn,
description: 'The ARN of the KMS key for CrowdStrike ingestion',
});
}
/**
* Output the bucket name, bucket ARN, queue name, and role name.
* You will need these values to configure CrowdStrike connectors.
*/
new aws_cdk_lib_1.CfnOutput(this, 'BucketName', {
value: this.bucketName,
description: 'The Name of the S3 bucket for CrowdStrike ingestion',
});
new aws_cdk_lib_1.CfnOutput(this, 'BucketArn', {
value: this.bucketArn,
description: 'The ARN of the S3 bucket for CrowdStrike ingestion',
});
new aws_cdk_lib_1.CfnOutput(this, 'QueueName', {
value: this.queue.queueName,
description: 'The Name of the SQS queue for CrowdStrike ingestion',
});
new aws_cdk_lib_1.CfnOutput(this, 'RoleName', {
value: this.role.roleName,
description: 'The Name of the IAM role for CrowdStrike ingestion',
});
}
}
exports.CrowdStrikeBucket = CrowdStrikeBucket;
_a = JSII_RTTI_SYMBOL_1;
CrowdStrikeBucket[_a] = { fqn: "@renovosolutions/cdk-library-crowdstrike-ingestion.CrowdStrikeBucket", version: "0.0.3" };
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enforceSSL: true, deadLetterQueue: { maxReceiveCount: 5, queue: new sqs.Queue(this, 'DLQ', { queueName: `${this.bucketName}-dlq`, enforceSSL: true, }), },\n   */\n  readonly queueProps?: sqs.QueueProps;\n  /**\n   * Whether to create a KMS key for the bucket.\n   *\n   * @default - false\n   */\n  readonly createKmsKey?: boolean;\n  /**\n   * Properties for the KMS key.\n   *\n   * @default - removalPolicy: RemovalPolicy.RETAIN_ON_UPDATE_OR_DELETE, enableKeyRotation: false, multiRegion: true, description: `KMS Key for CrowdStrike ingestion bucket ${this.bucketName}`,\n   */\n  readonly keyProps?: kms.KeyProps;\n  /**\n   * Properties for the IAM role.\n   *\n   * If you provide this, you must provide the roleProps.assumedBy property,\n   * and you don't need to provide the crowdStrikeRoleParameterArn and crowdStrikeExternalIdParameterArn.\n   *\n   * @default - none except for the assumedBy property which is set to a CrowdStrike principal.\n   */\n  readonly roleProps?: iam.RoleProps;\n  /**\n   * The CrowdStrike role ARN.\n   *\n   * Required unless the role principal is provided directly in the roleProps.\n   */\n  readonly crowdStrikeRoleArn?: string;\n  /**\n   * The ARN of the SSM parameter containing the CrowdStrike external ID.\n   *\n   * Required unless the role principal is provided directly in the roleProps.\n   */\n  readonly crowdStrikeExternalIdParameterArn?: string;\n  /**\n   * The organization ID.\n   * If provided, the bucket will allow write access to all accounts in the organization.\n   * If there is a KMS key, it will also allow encrypt/decrypt access to the organization.\n   *\n   * @default - none\n   */\n  readonly orgId?: string;\n  /**\n   * The name of the S3 bucket that will be sending S3 access logs to this bucket.\n   * This is used to configure the bucket policy to allow logging from that bucket.\n   *\n   * @default - none\n   */\n  readonly loggingBucketSourceName?: string;\n};\n\n/**\n * A construct that creates an S3 bucket for CrowdStrike data ingestion,\n * along with an SQS queue for notifications, an IAM role for access,\n * and optionally a KMS key for encryption.\n */\nexport class CrowdStrikeBucket extends s3.Bucket {\n  /**\n   * The SQS queue that receives notifications for new objects in the bucket.\n   */\n  public readonly queue: sqs.Queue;\n  /**\n   * The KMS key used for encrypting data in the bucket, if created.\n   * This will be undefined if createKmsKey is false.\n   *\n   * Note that the bucket will still be created with S3-managed encryption\n   * even if this is provided. The key is used by the service writing to the bucket.\n   */\n  public readonly key?: kms.Key;\n  /**\n   * The IAM role that CrowdStrike will assume to access the data in the bucket.\n   */\n  public readonly role: iam.Role;\n\n  /**\n   * Constructs a new CrowdStrikeBucket.\n   *\n   * @param scope The scope in which this construct is defined.\n   * @param id The scoped construct ID.\n   * @param props The properties for the bucket, queue, role, and optional KMS key.\n   */\n  constructor(scope: Construct, id: string, props: CrowdStrikeBucketProps) {\n    super(scope, id, {\n      encryption: s3.BucketEncryption.S3_MANAGED,\n      blockPublicAccess: s3.BlockPublicAccess.BLOCK_ALL,\n      enforceSSL: true,\n      versioned: true,\n      removalPolicy: RemovalPolicy.RETAIN_ON_UPDATE_OR_DELETE,\n      ...props,\n    });\n\n    /**\n     * If we have an orgId, grant bucket write access to all accounts in the organization.\n     * This is useful for allowing multiple accounts in an organization to write to the same bucket.\n     */\n    if (props.orgId) {\n      this.grantWrite(new iam.OrganizationPrincipal(props.orgId));\n    }\n\n    // If a logging bucket source name is provided, add a policy to allow that bucket to write logs to this bucket.\n    if (props.loggingBucketSourceName) {\n      this.addToResourcePolicy(\n        new iam.PolicyStatement({\n          effect: iam.Effect.ALLOW,\n          actions: ['s3:PutObject'],\n          resources: [this.arnForObjects('*')],\n          principals: [new iam.ServicePrincipal('logging.s3.amazonaws.com')],\n          conditions: {\n            ArnLike: {\n              'aws:SourceArn': `arn:aws:s3:::${props.loggingBucketSourceName}`,\n            },\n            StringEquals: {\n              'aws:SourceAccount': Stack.of(this).account,\n            },\n          },\n        }),\n      );\n    }\n\n    /**\n     * Create an SQS queue for notifications.\n     * If a queueName is provided, use it; otherwise, generate a default name based on the bucket name.\n     */\n    this.queue = new sqs.Queue(this, 'Queue', {\n      queueName: props.queueProps?.queueName || `${this.bucketName}-queue`,\n      enforceSSL: true,\n      deadLetterQueue: {\n        maxReceiveCount: 5,\n        queue: new sqs.Queue(this, 'DLQ', {\n          queueName: `${this.bucketName}-dlq`,\n          enforceSSL: true,\n        }),\n      },\n      ...props.queueProps,\n    });\n\n    // Add a notification for bucket object creation events to the SQS queue.\n    this.addEventNotification(\n      s3.EventType.OBJECT_CREATED,\n      new s3n.SqsDestination(this.queue),\n    );\n\n    /**\n     * Determine the principal for CrowdStrike.\n     * If roleProps are provided, use the assumedBy property from there.\n     * Otherwise, create a CrowdStrike principal using the role ARN and external ID from SSM parameters.\n     */\n    let crowdStrikePrincipal: iam.IPrincipal;\n    if (props.roleProps) {\n      crowdStrikePrincipal = props.roleProps.assumedBy;\n    } else if (props.crowdStrikeRoleArn && props.crowdStrikeExternalIdParameterArn) {\n      const crowdStrikeRoleArn = props.crowdStrikeRoleArn;\n\n      const crowdStrikeExternalId = ssm.StringParameter.fromStringParameterArn(\n        this,\n        'CrowdStrikeExternalIdParam',\n        props.crowdStrikeExternalIdParameterArn,\n      ).stringValue;\n\n      crowdStrikePrincipal = new iam.PrincipalWithConditions(new iam.ArnPrincipal(crowdStrikeRoleArn), {\n        StringEquals: {\n          'sts:ExternalId': crowdStrikeExternalId,\n        },\n      });\n    } else {\n      Annotations.of(this).addError(\n        'Either roleProps or both crowdStrikeRoleParameterArn and crowdStrikeExternalIdParameterArn must be provided.',\n      );\n      // This will not be used because of the error, but we need to initialize it to satisfy the type.\n      crowdStrikePrincipal = new iam.AnyPrincipal();\n    }\n\n    /**\n     * Create an IAM role for CrowdStrike to assume, granting it access to the resources created in this construct.\n     * The role name can be provided in the props, or a default name will be generated based on the bucket name.\n     */\n    this.role = new iam.Role(this, 'Role', {\n      roleName: props.roleProps?.roleName || `${this.bucketName}-role`,\n      assumedBy: crowdStrikePrincipal,\n      ...props.roleProps,\n    });\n\n    // Grant the role permissions to read from the bucket and consume messages from the SQS queue.\n    this.grantRead(this.role);\n    this.queue.grantConsumeMessages(this.role);\n\n    // If createKmsKey is true, create a KMS key for the data.\n    if (props.createKmsKey) {\n      this.key = new kms.Key(this, 'Key', {\n        alias: `alias/${this.bucketName}`,\n        removalPolicy: RemovalPolicy.RETAIN_ON_UPDATE_OR_DELETE,\n        enableKeyRotation: false,\n        multiRegion: true,\n        description: `KMS Key for CrowdStrike ingestion bucket ${this.bucketName}`,\n        ...props.keyProps,\n      });\n\n      // Grant the role permissions to use the KMS key for decryption.\n      this.key.grantDecrypt(this.role);\n\n      /**\n       * If an orgId is provided, grant permissions to use the KMS key\n       * for encryption and decryption for all accounts in the organization.\n       */\n      if (props.orgId) {\n        this.key.grantEncryptDecrypt(new iam.OrganizationPrincipal(props.orgId));\n      }\n\n      // Output the KMS key ARN for reference.\n      new CfnOutput(this, 'KmsKeyArn', {\n        value: this.key.keyArn,\n        description: 'The ARN of the KMS key for CrowdStrike ingestion',\n      });\n    }\n\n    /**\n     * Output the bucket name, bucket ARN, queue name, and role name.\n     * You will need these values to configure CrowdStrike connectors.\n     */\n    new CfnOutput(this, 'BucketName', {\n      value: this.bucketName,\n      description: 'The Name of the S3 bucket for CrowdStrike ingestion',\n    });\n\n    new CfnOutput(this, 'BucketArn', {\n      value: this.bucketArn,\n      description: 'The ARN of the S3 bucket for CrowdStrike ingestion',\n    });\n\n    new CfnOutput(this, 'QueueName', {\n      value: this.queue.queueName,\n      description: 'The Name of the SQS queue for CrowdStrike ingestion',\n    });\n\n    new CfnOutput(this, 'RoleName', {\n      value: this.role.roleName,\n      description: 'The Name of the IAM role for CrowdStrike ingestion',\n    });\n  }\n}\n"]}