Create a key for import

Set up an empty key for importing your own crypto key.

Explore further

For detailed documentation that includes this code sample, see the following:

• Import a key version into Cloud KMS

Code sample

Go

To learn how to install and use the client library for Cloud KMS, see Cloud KMS client libraries.

To authenticate to Cloud KMS, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import (
	"context"
	"fmt"
	"io"

	kms "cloud.google.com/go/kms/apiv1"
	"cloud.google.com/go/kms/apiv1/kmspb"
)

// createKeyForImport creates a new asymmetric signing key in Cloud HSM.
func createKeyForImport(w io.Writer, parent, id string) error {
	// parent := "projects/my-project/locations/us-east1/keyRings/my-key-ring"
	// id := "my-imported-key"

	// Create the client.
	ctx := context.Background()
	client, err := kms.NewKeyManagementClient(ctx)
	if err != nil {
		return fmt.Errorf("failed to create kms client: %w", err)
	}
	defer client.Close()

	// Build the request.
	req := &kmspb.CreateCryptoKeyRequest{
		Parent:      parent,
		CryptoKeyId: id,
		CryptoKey: &kmspb.CryptoKey{
			Purpose: kmspb.CryptoKey_ASYMMETRIC_SIGN,
			VersionTemplate: &kmspb.CryptoKeyVersionTemplate{
				ProtectionLevel: kmspb.ProtectionLevel_HSM,
				Algorithm:       kmspb.CryptoKeyVersion_EC_SIGN_P256_SHA256,
			},
			// Ensure that only imported versions may be added to this key.
			ImportOnly: true,
		},
		SkipInitialVersionCreation: true,
	}

	// Call the API.
	result, err := client.CreateCryptoKey(ctx, req)
	if err != nil {
		return fmt.Errorf("failed to create key: %w", err)
	}
	fmt.Fprintf(w, "Created key: %s\n", result.Name)
	return nil
}

Java

To learn how to install and use the client library for Cloud KMS, see Cloud KMS client libraries.

To authenticate to Cloud KMS, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import com.google.cloud.kms.v1.CreateCryptoKeyRequest;
import com.google.cloud.kms.v1.CryptoKey;
import com.google.cloud.kms.v1.CryptoKey.CryptoKeyPurpose;
import com.google.cloud.kms.v1.CryptoKeyVersion.CryptoKeyVersionAlgorithm;
import com.google.cloud.kms.v1.CryptoKeyVersionTemplate;
import com.google.cloud.kms.v1.KeyManagementServiceClient;
import com.google.cloud.kms.v1.KeyRingName;
import com.google.cloud.kms.v1.ProtectionLevel;
import java.io.IOException;

public class CreateKeyForImport {

  public void createKeyForImport() throws IOException {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "your-project-id";
    String locationId = "us-east1";
    String keyRingId = "my-key-ring";
    String id = "my-import-key";
    createKeyForImport(projectId, locationId, keyRingId, id);
  }

  // Create a new crypto key to hold imported key versions.
  public void createKeyForImport(String projectId, String locationId, String keyRingId, String id)
      throws IOException {
    // Initialize client that will be used to send requests. This client only
    // needs to be created once, and can be reused for multiple requests. After
    // completing all of your requests, call the "close" method on the client to
    // safely clean up any remaining background resources.
    try (KeyManagementServiceClient client = KeyManagementServiceClient.create()) {
      // Build the parent name from the project, location, and key ring.
      KeyRingName keyRingName = KeyRingName.of(projectId, locationId, keyRingId);

      // Create the crypto key.
      CryptoKey createdKey =
          client.createCryptoKey(
              CreateCryptoKeyRequest.newBuilder()
                  .setParent(keyRingName.toString())
                  .setCryptoKeyId(id)
                  .setCryptoKey(
                      CryptoKey.newBuilder()
                          .setPurpose(CryptoKeyPurpose.ASYMMETRIC_SIGN)
                          .setVersionTemplate(
                              CryptoKeyVersionTemplate.newBuilder()
                                  .setProtectionLevel(ProtectionLevel.HSM)
                                  .setAlgorithm(CryptoKeyVersionAlgorithm.EC_SIGN_P256_SHA256))
                          // Ensure that only imported versions may be
                          // added to this key.
                          .setImportOnly(true))
                  .setSkipInitialVersionCreation(true)
                  .build());

      System.out.printf("Created crypto key %s%n", createdKey.getName());
    }
  }
}

Node.js

To learn how to install and use the client library for Cloud KMS, see Cloud KMS client libraries.

To authenticate to Cloud KMS, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

//
// TODO(developer): Uncomment these variables before running the sample.
//
// const projectId = 'my-project';
// const locationId = 'us-east1';
// const keyRingId = 'my-key-ring';
// const id = 'my-imported-key';

// Imports the Cloud KMS library
const {KeyManagementServiceClient} = require('@google-cloud/kms');

// Instantiates a client
const client = new KeyManagementServiceClient();

// Build the parent key ring name
const keyRingName = client.keyRingPath(projectId, locationId, keyRingId);

async function createKeyForImport() {
  const [key] = await client.createCryptoKey({
    parent: keyRingName,
    cryptoKeyId: id,
    cryptoKey: {
      purpose: 'ENCRYPT_DECRYPT',
      versionTemplate: {
        algorithm: 'GOOGLE_SYMMETRIC_ENCRYPTION',
        protectionLevel: 'HSM',
      },
      // Optional: ensure that only imported versions may be added to this
      // key.
      importOnly: true,
    },
    // Do not allow KMS to generate an initial version of this key.
    skipInitialVersionCreation: true,
  });

  console.log(`Created key for import: ${key.name}`);
  return key;
}

return createKeyForImport();

Python

To learn how to install and use the client library for Cloud KMS, see Cloud KMS client libraries.

To authenticate to Cloud KMS, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

from google.cloud import kms


def create_key_for_import(
    project_id: str, location_id: str, key_ring_id: str, crypto_key_id: str
) -> None:
    """

    Sets up an empty CryptoKey within a KeyRing for import.


    Args:
        project_id (string): Google Cloud project ID (e.g. 'my-project').
        location_id (string): Cloud KMS location (e.g. 'us-east1').
        key_ring_id (string): ID of the Cloud KMS key ring (e.g. 'my-key-ring').
        crypto_key_id (string): ID of the key to import (e.g. 'my-asymmetric-signing-key').
    """

    # Create the client.
    client = kms.KeyManagementServiceClient()

    # Build the key. For more information regarding allowed values of these fields, see:
    # https://googleapis.dev/python/cloudkms/latest/_modules/google/cloud/kms_v1/types/resources.html
    purpose = kms.CryptoKey.CryptoKeyPurpose.ASYMMETRIC_SIGN
    algorithm = kms.CryptoKeyVersion.CryptoKeyVersionAlgorithm.EC_SIGN_P256_SHA256
    protection_level = kms.ProtectionLevel.HSM
    key = {
        "purpose": purpose,
        "version_template": {
            "algorithm": algorithm,
            "protection_level": protection_level,
        },
    }

    # Build the parent key ring name.
    key_ring_name = client.key_ring_path(project_id, location_id, key_ring_id)

    # Call the API.
    created_key = client.create_crypto_key(
        request={
            "parent": key_ring_name,
            "crypto_key_id": crypto_key_id,
            "crypto_key": key,
            # Do not allow KMS to generate an initial version of this key.
            "skip_initial_version_creation": True,
        }
    )
    print(f"Created hsm key: {created_key.name}")

What's next

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