Obtenir une attestation de version de clé

Obtenir une attestation de clé backend HSM

Exemple de code

C#

Pour savoir comment installer et utiliser la bibliothèque cliente pour Cloud KMS, consultez la page Bibliothèques clientes Cloud KMS.

Pour vous authentifier auprès de Cloud KMS, configurez les Identifiants par défaut de l'application. Pour en savoir plus, consultez Configurer l'authentification pour un environnement de développement local.


using Google.Cloud.Kms.V1;
using System;

public class GetKeyVersionAttestationSample
{
    public byte[] GetKeyVersionAttestation(
      string projectId = "my-project", string locationId = "us-east1", string keyRingId = "my-key-ring", string keyId = "my-key", string keyVersionId = "123")
    {
        // Create the client.
        KeyManagementServiceClient client = KeyManagementServiceClient.Create();

        // Build the key name.
        CryptoKeyVersionName keyVersionName = new CryptoKeyVersionName(projectId, locationId, keyRingId, keyId, keyVersionId);

        // Call the API.
        CryptoKeyVersion result = client.GetCryptoKeyVersion(keyVersionName);

        // Only HSM keys have an attestation. For other key types, the attestion
        // will be nil.
        KeyOperationAttestation attestation = result.Attestation;
        if (attestation == null)
        {
            throw new InvalidOperationException("no attestation");
        }

        // Return the attestation.
        return attestation.Content.ToByteArray();
    }
}

Go

Pour savoir comment installer et utiliser la bibliothèque cliente pour Cloud KMS, consultez la page Bibliothèques clientes Cloud KMS.

import (
	"context"
	"fmt"
	"io"

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

// getKeyVersionAttestation gets the attestation on a key version, if one
// exists.
func getKeyVersionAttestation(w io.Writer, name string) error {
	// name := "projects/my-project/locations/us-east1/keyRings/my-key-ring/cryptoKeys/my-key/cryptoKeyVersions/123"

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

	// Build the request.
	req := &kmspb.GetCryptoKeyVersionRequest{
		Name: name,
	}

	// Call the API.
	result, err := client.GetCryptoKeyVersion(ctx, req)
	if err != nil {
		return fmt.Errorf("failed to get key: %w", err)
	}

	// Only HSM keys have an attestation. For other key types, the attestion will
	// be nil.
	attestation := result.Attestation
	if attestation == nil {
		return fmt.Errorf("no attestation for %s", name)
	}

	// Print the attestation, hex-encoded.
	fmt.Fprintf(w, "%s: %x", attestation.Format, attestation.Content)
	return nil
}

Java

Pour savoir comment installer et utiliser la bibliothèque cliente pour Cloud KMS, consultez la page Bibliothèques clientes Cloud KMS.

import com.google.cloud.kms.v1.CryptoKeyVersion;
import com.google.cloud.kms.v1.CryptoKeyVersionName;
import com.google.cloud.kms.v1.KeyManagementServiceClient;
import com.google.cloud.kms.v1.KeyOperationAttestation;
import java.io.IOException;
import java.util.Base64;

public class GetKeyVersionAttestation {

  public void getKeyVersionAttestation() 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 keyId = "my-key";
    String keyVersionId = "123";
    getKeyVersionAttestation(projectId, locationId, keyRingId, keyId, keyVersionId);
  }

  // Get the attestations for a key version
  public void getKeyVersionAttestation(
      String projectId, String locationId, String keyRingId, String keyId, String keyVersionId)
      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 name from the project, location, key ring, and keyId.
      CryptoKeyVersionName keyVersionName =
          CryptoKeyVersionName.of(projectId, locationId, keyRingId, keyId, keyVersionId);

      // Get the key version.
      CryptoKeyVersion keyVersion = client.getCryptoKeyVersion(keyVersionName);

      // Only HSM keys have an attestation. For other key types, the attestion
      // will be nil.
      if (!keyVersion.hasAttestation()) {
        System.out.println("no attestation");
        return;
      }

      // Print the attestation, base64-encoded.
      KeyOperationAttestation attestation = keyVersion.getAttestation();
      String format = attestation.getFormat().toString();
      byte[] content = attestation.getContent().toByteArray();
      System.out.printf("%s: %s", format, Base64.getEncoder().encodeToString(content));
    }
  }
}

Node.js

Pour savoir comment installer et utiliser la bibliothèque cliente pour Cloud KMS, consultez la page Bibliothèques clientes Cloud KMS.

//
// TODO(developer): Uncomment these variables before running the sample.
//
// const projectId = 'my-project';
// const locationId = 'us-east1';
// const keyRingId = 'my-key-ring';
// const keyId = 'my-key';
// const versionId = '123';

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

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

// Build the key version name
const versionName = client.cryptoKeyVersionPath(
  projectId,
  locationId,
  keyRingId,
  keyId,
  versionId
);

async function getKeyVersionAttestation() {
  const [version] = await client.getCryptoKeyVersion({
    name: versionName,
  });

  // Only HSM keys have an attestation. For other key types, the attestion
  // will be nil.
  const attestation = version.attestation;
  if (!attestation) {
    throw new Error('no attestation');
  }

  console.log(`Attestation: ${attestation.toString('base64')}`);
  return attestation.content;
}

return getKeyVersionAttestation();

PHP

Pour savoir comment installer et utiliser la bibliothèque cliente pour Cloud KMS, consultez la page Bibliothèques clientes Cloud KMS.

use Google\Cloud\Kms\V1\Client\KeyManagementServiceClient;
use Google\Cloud\Kms\V1\GetCryptoKeyVersionRequest;

function get_key_version_attestation(
    string $projectId = 'my-project',
    string $locationId = 'us-east1',
    string $keyRingId = 'my-key-ring',
    string $keyId = 'my-key',
    string $versionId = '123'
) {
    // Create the Cloud KMS client.
    $client = new KeyManagementServiceClient();

    // Build the key name.
    $keyVersionName = $client->cryptokeyVersionName($projectId, $locationId, $keyRingId, $keyId, $versionId);

    // Call the API.
    $getCryptoKeyVersionRequest = (new GetCryptoKeyVersionRequest())
        ->setName($keyVersionName);
    $version = $client->getCryptoKeyVersion($getCryptoKeyVersionRequest);

    // Only HSM keys have an attestation. For other key types, the attestion
    // will be NULL.
    $attestation = $version->getAttestation();
    if (!$attestation) {
        throw new Exception('no attestation - attestations only exist on HSM keys');
    }

    printf('Got key attestation: %s' . PHP_EOL, $attestation->getContent());

    return $attestation;
}

Python

Pour savoir comment installer et utiliser la bibliothèque cliente pour Cloud KMS, consultez la page Bibliothèques clientes Cloud KMS.

from google.cloud import kms

def get_key_version_attestation(
    project_id: str, location_id: str, key_ring_id: str, key_id: str, version_id: str
) -> kms.KeyOperationAttestation:
    """
    Get an HSM-backend key's attestation.

    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').
        key_id (string): ID of the key to use (e.g. 'my-key').
        version_id (string): ID of the version to use (e.g. '1').

    Returns:
        Attestation: Cloud KMS key attestation.

    """

    # Import base64 for printing the attestation.
    import base64

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

    # Build the key version name.
    key_version_name = client.crypto_key_version_path(
        project_id, location_id, key_ring_id, key_id, version_id
    )

    # Call the API.
    version = client.get_crypto_key_version(request={"name": key_version_name})

    # Only HSM keys have an attestation. For other key types, the attestion
    # will be None.
    attestation = version.attestation
    if not attestation:
        raise "no attestation - attestations only exist on HSM keys"

    encoded_attestation = base64.b64encode(attestation.content)
    print(f"Got key attestation: {encoded_attestation!r}")
    return attestation

Ruby

Pour savoir comment installer et utiliser la bibliothèque cliente pour Cloud KMS, consultez la page Bibliothèques clientes Cloud KMS.

# TODO(developer): uncomment these values before running the sample.
# project_id  = "my-project"
# location_id = "us-east1"
# key_ring_id = "my-key-ring"
# key_id      = "my-key"
# version_id  = "123"

# Require the library.
require "google/cloud/kms"

# Create the client.
client = Google::Cloud::Kms.key_management_service

# Build the key version name.
key_version_name = client.crypto_key_version_path project:            project_id,
                                                  location:           location_id,
                                                  key_ring:           key_ring_id,
                                                  crypto_key:         key_id,
                                                  crypto_key_version: version_id

# Call the API.
version = client.get_crypto_key_version name: key_version_name

# Only HSM keys have an attestation. For other key types, the attestion will
# be nil.
attestation = version.attestation
unless attestation
  raise "no attestation"
end

puts "Attestation: #{Base64.strict_encode64 attestation.content}"

Étapes suivantes

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