interface KeyProps

Language	Type name
.NET	`Amazon.CDK.AWS.KMS.KeyProps`
Java	`software.amazon.awscdk.services.kms.KeyProps`
Python	`aws_cdk.aws_kms.KeyProps`
TypeScript (source)	`@aws-cdk/aws-kms` » `KeyProps`

Construction properties for a KMS Key object.

Example

const myTrustedAdminRole = iam.Role.fromRoleArn(this, 'TrustedRole', 'arn:aws:iam:....');
// Creates a limited admin policy and assigns to the account root.
const myCustomPolicy = new iam.PolicyDocument({
  statements: [new iam.PolicyStatement({
    actions: [
      'kms:Create*',
      'kms:Describe*',
      'kms:Enable*',
      'kms:List*',
      'kms:Put*',
    ],
    principals: [new iam.AccountRootPrincipal()],
    resources: ['*'],
  })],
});
const key = new kms.Key(this, 'MyKey', {
  policy: myCustomPolicy,
});

Properties

Name	Type	Description
admins?	`IPrincipal[]`	A list of principals to add as key administrators to the key policy.
alias?	`string`	Initial alias to add to the key.
description?	`string`	A description of the key.
enableKeyRotation?	`boolean`	Indicates whether AWS KMS rotates the key.
enabled?	`boolean`	Indicates whether the key is available for use.
keySpec?	`KeySpec`	The cryptographic configuration of the key. The valid value depends on usage of the key.
keyUsage?	`KeyUsage`	The cryptographic operations for which the key can be used.
pendingWindow?	`Duration`	Specifies the number of days in the waiting period before AWS KMS deletes a CMK that has been removed from a CloudFormation stack.
policy?	`PolicyDocument`	Custom policy document to attach to the KMS key.
removalPolicy?	`RemovalPolicy`	Whether the encryption key should be retained when it is removed from the Stack.
trustAccountIdentities?⚠️	`boolean`	Whether the key usage can be granted by IAM policies.

admins?

Type: IPrincipal[] (optional, default: [])

A list of principals to add as key administrators to the key policy.

Key administrators have permissions to manage the key (e.g., change permissions, revoke), but do not have permissions to use the key in cryptographic operations (e.g., encrypt, decrypt).

These principals will be added to the default key policy (if none specified), or to the specified policy (if provided).

alias?

Type: string (optional, default: No alias is added for the key.)

Initial alias to add to the key.

More aliases can be added later by calling addAlias.

description?

Type: string (optional, default: No description.)

A description of the key.

Use a description that helps your users decide whether the key is appropriate for a particular task.

enableKeyRotation?

Type: boolean (optional, default: false)

Indicates whether AWS KMS rotates the key.

enabled?

Type: boolean (optional, default: Key is enabled.)

Indicates whether the key is available for use.

keySpec?

Type: KeySpec (optional, default: KeySpec.SYMMETRIC_DEFAULT)

The cryptographic configuration of the key. The valid value depends on usage of the key.

IMPORTANT: If you change this property of an existing key, the existing key is scheduled for deletion and a new key is created with the specified value.

keyUsage?

Type: KeyUsage (optional, default: KeyUsage.ENCRYPT_DECRYPT)

The cryptographic operations for which the key can be used.

IMPORTANT: If you change this property of an existing key, the existing key is scheduled for deletion and a new key is created with the specified value.

pendingWindow?

Type: Duration (optional, default: 30 days)

Specifies the number of days in the waiting period before AWS KMS deletes a CMK that has been removed from a CloudFormation stack.

When you remove a customer master key (CMK) from a CloudFormation stack, AWS KMS schedules the CMK for deletion and starts the mandatory waiting period. The PendingWindowInDays property determines the length of waiting period. During the waiting period, the key state of CMK is Pending Deletion, which prevents the CMK from being used in cryptographic operations. When the waiting period expires, AWS KMS permanently deletes the CMK.

Enter a value between 7 and 30 days.

policy?

Type: PolicyDocument (optional, default: A policy document with permissions for the account root to administer the key will be created.)

Custom policy document to attach to the KMS key.

NOTE - If the @aws-cdk/aws-kms:defaultKeyPolicies feature flag is set (the default for new projects), this policy will override the default key policy and become the only key policy for the key. If the feature flag is not set, this policy will be appended to the default key policy.

removalPolicy?

Type: RemovalPolicy (optional, default: RemovalPolicy.Retain)

Whether the encryption key should be retained when it is removed from the Stack.

This is useful when one wants to retain access to data that was encrypted with a key that is being retired.

trustAccountIdentities?⚠️

⚠️ Deprecated: redundant with the @aws-cdk/aws-kms:defaultKeyPolicies feature flag

Type: boolean (optional, default: false, unless the @aws-cdk/aws-kms:defaultKeyPolicies feature flag is set.)

Whether the key usage can be granted by IAM policies.

Setting this to true adds a default statement which delegates key access control completely to the identity's IAM policy (similar to how it works for other AWS resources). This matches the default behavior when creating KMS keys via the API or console.

If the @aws-cdk/aws-kms:defaultKeyPolicies feature flag is set (the default for new projects), this flag will always be treated as 'true' and does not need to be explicitly set.