CDK v2 support

README.md

@@ -72,6 +72,22 @@ It takes an object, where:
     - `path`, required, an array of strings, pointing to a value in the structured sops data
     - `encoding`, optional, `'string'` or `'json'`, control how to alter the value found from sops for storage in Secrets Manager
 
+## CDK v1 and v2
+
+CDK v1:
+```typescript
+import { SopsSecretsManager } from 'sops-secretsmanager-cdk';
+// or
+import { SopsSecretsManager } from 'sops-secretsmanager-cdk/cdkv1';
+```
+
+CDK v2:
+```typescript
+import { SopsSecretsManager } from 'sops-secretsmanager-cdk/cdkv2';
+```
+
+Note: `hackToForceNode12` has no effect with CDK v2.
+
 ## Implementation
 
 Using the CDK's custom resource mini-framework, the sops secrets file

cdkv1.ts

@@ -0,0 +1,120 @@
+import * as cfn from '@aws-cdk/aws-cloudformation';
+import * as iam from '@aws-cdk/aws-iam';
+import * as kms from '@aws-cdk/aws-kms';
+import * as lambda from '@aws-cdk/aws-lambda';
+import * as s3Assets from '@aws-cdk/aws-s3-assets';
+import * as secretsManager from '@aws-cdk/aws-secretsmanager';
+import * as cdk from '@aws-cdk/core';
+import * as customResource from '@aws-cdk/custom-resources';
+import * as common from './common';
+export * from './common';
+
+export interface SopsSecretsManagerProps extends common.SopsSecretsManagerBaseProps {
+    readonly secret?: secretsManager.Secret | secretsManager.ISecret;
+    readonly asset?: s3Assets.Asset;
+    readonly kmsKey?: kms.IKey;
+}
+
+class SopsSecretsManagerProvider extends cdk.Construct {
+    public readonly provider: customResource.Provider;
+
+    public static getOrCreate(scope: cdk.Construct, forceNode12: boolean): customResource.Provider {
+        const stack = cdk.Stack.of(scope);
+        const id = common.providerId;
+        const x = (stack.node.tryFindChild(id) as SopsSecretsManagerProvider) || new SopsSecretsManagerProvider(stack, id, forceNode12);
+        return x.provider;
+    }
+
+    constructor(scope: cdk.Construct, id: string, forceNode12: boolean) {
+        super(scope, id);
+
+        const policyStatements: Array<iam.PolicyStatement> = [];
+        for (const statement of common.providerPolicyStatements) {
+            policyStatements.push(new iam.PolicyStatement(statement));
+        }
+
+        this.provider = new customResource.Provider(this, common.providerLogicalId, {
+            onEventHandler: new lambda.Function(this, common.providerFunctionLogicalId, {
+                code: lambda.Code.fromAsset(common.providerCodePath),
+                runtime: lambda.Runtime.NODEJS_12_X,
+                handler: common.providerHandler,
+                timeout: cdk.Duration.minutes(common.providerTimoutMinutes),
+                initialPolicy: policyStatements,
+            }),
+        });
+
+        if (forceNode12) {
+            // Find the provider lambda and hack away
+            // This section hacks the CDK's utility lambda to use Node 12,
+            // which uses Node 10 in cdk <1.94.0. This is no longer
+            // deployable as of July 30, 2021.
+            const lambdaFn = (this.provider.node.findChild('framework-onEvent') as unknown) as lambda.Function;
+            const cfnLambdaFn = lambdaFn.node.defaultChild as lambda.CfnFunction;
+            cfnLambdaFn.addPropertyOverride('Runtime', lambda.Runtime.NODEJS_12_X.toString());
+        }
+    }
+}
+
+export class SopsSecretsManager extends cdk.Construct {
+    public readonly secret: secretsManager.Secret | undefined;
+    public readonly secretArn: string;
+    public readonly asset: s3Assets.Asset;
+
+    constructor(scope: cdk.Construct, id: string, props: SopsSecretsManagerProps) {
+        super(scope, id);
+
+        if (props.secret && props.secretName) {
+            throw new Error('Cannot set both secret and secretName');
+        } else if (props.secret) {
+            this.secretArn = props.secret.secretArn;
+            this.secret = undefined;
+        } else if (props.secretName) {
+            this.secret = new secretsManager.Secret(this, 'Secret', {
+                secretName: props.secretName,
+            });
+            this.secretArn = this.secret.secretArn;
+        } else {
+            throw new Error('Must set one of secret or secretName');
+        }
+        this.asset = this.getAsset(props.asset, props.path);
+
+        if (props.wholeFile && props.mappings) {
+            throw new Error('Cannot set mappings and set wholeFile to true');
+        } else if (!props.wholeFile && !props.mappings) {
+            throw new Error('Must set mappings or set wholeFile to true');
+        }
+
+        new cfn.CustomResource(this, 'Resource', {
+            provider: SopsSecretsManagerProvider.getOrCreate(this, props.hackToForceNode12 ?? false),
+            resourceType: 'Custom::SopsSecretsManager',
+            properties: {
+                SecretArn: this.secretArn,
+                S3Bucket: this.asset.s3BucketName,
+                S3Path: this.asset.s3ObjectKey,
+                SourceHash: this.asset.sourceHash,
+                KMSKeyArn: props.kmsKey?.keyArn,
+                Mappings: JSON.stringify(props.mappings || {}),
+                WholeFile: props.wholeFile || false,
+                FileType: props.fileType,
+            },
+        });
+    }
+
+    public getAsset(asset?: s3Assets.Asset, secretFilePath?: string): s3Assets.Asset {
+        if (asset && secretFilePath) {
+            throw new Error('Cannot set both asset and path');
+        }
+
+        if (asset) {
+            return asset;
+        }
+
+        if (secretFilePath) {
+            return new s3Assets.Asset(this, 'SopsAsset', {
+                path: secretFilePath,
+            });
+        }
+
+        throw new Error('Must set one of asset or path');
+    }
+}

cdkv2.ts

@@ -0,0 +1,112 @@
+import * as iam from 'aws-cdk-lib/aws-iam';
+import * as kms from 'aws-cdk-lib/aws-kms';
+import * as lambda from 'aws-cdk-lib/aws-lambda';
+import * as s3Assets from 'aws-cdk-lib/aws-s3-assets';
+import * as secretsManager from 'aws-cdk-lib/aws-secretsmanager';
+import * as cdk from 'aws-cdk-lib';
+import * as constructs from 'constructs';
+import * as customResource from 'aws-cdk-lib/custom-resources';
+import * as common from './common';
+export * from './common';
+
+export interface SopsSecretsManagerProps extends common.SopsSecretsManagerBaseProps {
+    readonly secret?: secretsManager.Secret | secretsManager.ISecret;
+    readonly asset?: s3Assets.Asset;
+    readonly kmsKey?: kms.IKey;
+}
+
+class SopsSecretsManagerProvider extends constructs.Construct {
+    public readonly provider: customResource.Provider;
+
+    public static getOrCreate(scope: constructs.Construct): customResource.Provider {
+        const stack = cdk.Stack.of(scope);
+        const id = common.providerId;
+        const x = (stack.node.tryFindChild(id) as SopsSecretsManagerProvider) || new SopsSecretsManagerProvider(stack, id);
+        return x.provider;
+    }
+
+    constructor(scope: constructs.Construct, id: string) {
+        super(scope, id);
+
+        const policyStatements: Array<iam.PolicyStatement> = [];
+        for (const statement of common.providerPolicyStatements) {
+            policyStatements.push(new iam.PolicyStatement(statement));
+        }
+
+        this.provider = new customResource.Provider(this, common.providerLogicalId, {
+            onEventHandler: new lambda.Function(this, common.providerFunctionLogicalId, {
+                code: lambda.Code.fromAsset(common.providerCodePath),
+                runtime: lambda.Runtime.NODEJS_12_X,
+                handler: common.providerHandler,
+                timeout: cdk.Duration.minutes(common.providerTimoutMinutes),
+                initialPolicy: policyStatements,
+            }),
+        });
+    }
+}
+
+export class SopsSecretsManager extends constructs.Construct {
+    public readonly secret: secretsManager.Secret | undefined;
+    public readonly secretArn: string;
+    public readonly asset: s3Assets.Asset;
+
+    constructor(scope: constructs.Construct, id: string, props: SopsSecretsManagerProps) {
+        super(scope, id);
+
+        if (props.secret && props.secretName) {
+            throw new Error('Cannot set both secret and secretName');
+        } else if (props.secret) {
+            this.secretArn = props.secret.secretArn;
+            this.secret = undefined;
+        } else if (props.secretName) {
+            this.secret = new secretsManager.Secret(this, 'Secret', {
+                secretName: props.secretName,
+            });
+            this.secretArn = this.secret.secretArn;
+        } else {
+            throw new Error('Must set one of secret or secretName');
+        }
+        this.asset = this.getAsset(props.asset, props.path);
+
+        if (props.wholeFile && props.mappings) {
+            throw new Error('Cannot set mappings and set wholeFile to true');
+        } else if (!props.wholeFile && !props.mappings) {
+            throw new Error('Must set mappings or set wholeFile to true');
+        }
+
+        const provider = SopsSecretsManagerProvider.getOrCreate(this);
+
+        new cdk.CustomResource(this, 'Resource', {
+            serviceToken: provider.serviceToken,
+            resourceType: 'Custom::SopsSecretsManager',
+            properties: {
+                SecretArn: this.secretArn,
+                S3Bucket: this.asset.s3BucketName,
+                S3Path: this.asset.s3ObjectKey,
+                SourceHash: this.asset.assetHash,
+                KMSKeyArn: props.kmsKey?.keyArn,
+                Mappings: JSON.stringify(props.mappings || {}),
+                WholeFile: props.wholeFile || false,
+                FileType: props.fileType,
+            },
+        });
+    }
+
+    public getAsset(asset?: s3Assets.Asset, secretFilePath?: string): s3Assets.Asset {
+        if (asset && secretFilePath) {
+            throw new Error('Cannot set both asset and path');
+        }
+
+        if (asset) {
+            return asset;
+        }
+
+        if (secretFilePath) {
+            return new s3Assets.Asset(this, 'SopsAsset', {
+                path: secretFilePath,
+            });
+        }
+
+        throw new Error('Must set one of asset or path');
+    }
+}

common.ts

@@ -0,0 +1,49 @@
+import * as path from 'path';
+
+export type SopsSecretsManagerEncoding = 'string' | 'json';
+
+export type SopsSecretsManagerFileType = 'yaml' | 'json';
+
+export interface SopsSecretsManagerMapping {
+    path: Array<string>;
+    encoding?: SopsSecretsManagerEncoding;
+}
+
+export interface SopsSecretsManagerMappings {
+    [key: string]: SopsSecretsManagerMapping;
+}
+
+export interface SopsSecretsManagerBaseProps {
+    readonly secret?: unknown;
+    readonly secretName?: string;
+    readonly asset?: unknown;
+    readonly path?: string;
+    readonly kmsKey?: unknown;
+    readonly mappings?: SopsSecretsManagerMappings;
+    readonly wholeFile?: boolean;
+    readonly fileType?: SopsSecretsManagerFileType;
+    readonly hackToForceNode12?: boolean;
+}
+
+export const providerId = 'com.isotoma.cdk.custom-resources.sops-secrets-manager';
+export const providerLogicalId = 'sops-secrets-manager-provider';
+export const providerFunctionLogicalId = 'sops-secrets-manager-event';
+export const providerCodePath = path.join(__dirname, 'provider');
+export const providerHandler = 'index.onEvent';
+export const providerTimoutMinutes = 5;
+
+interface PolicyStatement {
+    resources: Array<string>;
+    actions: Array<string>;
+};
+
+export const providerPolicyStatements: Array<PolicyStatement> = [{
+    resources: ['*'],
+    actions: ['s3:GetObject*', 's3:GetBucket*', 's3:List*', 's3:DeleteObject*', 's3:PutObject*', 's3:Abort*'],
+}, {
+    resources: ['*'],
+    actions: ['kms:*'],
+}, {
+    resources: ['*'],
+    actions: ['secretsmanager:*'],
+}];