Remove the default KMS key name

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name) {
  StatusOr<gcs::BucketMetadata> updated = client.PatchBucket(
      bucket_name, gcs::BucketMetadataPatchBuilder().ResetEncryption());
  if (!updated) throw std::move(updated).status();

  std::cout << "Successfully removed default KMS key on bucket "
            << updated->name() << "\n";
}

using Google.Apis.Storage.v1.Data;
using Google.Cloud.Storage.V1;
using System;

public class BucketDeleteDefaultKmsKeySample
{
    public Bucket BucketDeleteDefaultKmsKey(string bucketName = "your-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);

        if (bucket.Encryption == null)
        {
            Console.WriteLine("No default kms key to remove");
        }
        else
        {
            bucket.Encryption.DefaultKmsKeyName = null;
            bucket = storage.UpdateBucket(bucket);
            Console.WriteLine($"Default KMS key was removed from {bucketName}. ");
        }

        return bucket;
    }
}

import (
	"context"
	"fmt"
	"io"
	"time"

	"cloud.google.com/go/storage"
)

// removeBucketDefaultKMSKey removes any default Cloud KMS key set on a bucket.
func removeBucketDefaultKMSKey(w io.Writer, bucketName string) error {
	// bucketName := "bucket-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()

	bucket := client.Bucket(bucketName)
	bucketAttrsToUpdate := storage.BucketAttrsToUpdate{
		Encryption: &storage.BucketEncryption{},
	}
	if _, err := bucket.Update(ctx, bucketAttrsToUpdate); err != nil {
		return fmt.Errorf("Bucket(%q).Update: %w", bucketName, err)
	}
	fmt.Fprintf(w, "Default KMS key was removed from: %v", bucketName)
	return nil
}

import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.Storage.BucketTargetOption;
import com.google.cloud.storage.StorageOptions;

public class RemoveBucketDefaultKmsKey {
  public static void removeBucketDefaultKmsKey(String projectId, String bucketName) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    // first look up the bucket, so we will have its metageneration
    Bucket bucket = storage.get(bucketName);
    storage.update(
        bucket.toBuilder().setDefaultKmsKeyName(null).build(),
        BucketTargetOption.metagenerationMatch());

    System.out.println("Default KMS key was removed from " + bucketName);
  }
}

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// The ID of your GCS bucket
// const bucketName = 'your-unique-bucket-name';

// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');

// Creates a client
const storage = new Storage();

async function removeDefaultKMSKey() {
  await storage.bucket(bucketName).setMetadata({
    encryption: {
      defaultKmsKeyName: null,
    },
  });

  console.log(`Default KMS key was removed from ${bucketName}`);
}

removeDefaultKMSKey().catch(console.error);

use Google\Cloud\Storage\StorageClient;

/**
 * Delete the default KMS key on the given bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 */
function bucket_delete_default_kms_key(string $bucketName): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);

    $objects = $bucket->objects([
        'encryption' => [
            'defaultKmsKeyName' => null,
        ]
    ]);

    printf('Default KMS key was removed from %s', $bucketName);
}

from google.cloud import storage


def bucket_delete_default_kms_key(bucket_name):
    """Delete a default KMS key of bucket"""
    # bucket_name = "your-bucket-name"

    storage_client = storage.Client()

    bucket = storage_client.get_bucket(bucket_name)
    bucket.default_kms_key_name = None
    bucket.patch()

    print(f"Default KMS key was removed from {bucket.name}")
    return bucket

def bucket_delete_default_kms_key bucket_name:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new
  bucket = storage.bucket bucket_name

  bucket.default_kms_key = nil

  puts "Default KMS key was removed from #{bucket_name}"
end