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UploadKmsEncryptedObject.java
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UploadKmsEncryptedObject.java
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/*
* Copyright 2022 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.storage.object;
// [START storage_upload_with_kms_key]
import static java.nio.charset.StandardCharsets.UTF_8;
import com.google.cloud.storage.BlobId;
import com.google.cloud.storage.BlobInfo;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
public class UploadKmsEncryptedObject {
public static void uploadKmsEncryptedObject(
String projectId, String bucketName, String objectName, String kmsKeyName) {
// The ID of your GCP project
// String projectId = "your-project-id";
// The ID of your GCS bucket
// String bucketName = "your-unique-bucket-name";
// The ID of your GCS object
// String objectName = "your-object-name";
// The name of the KMS key to encrypt with
// String kmsKeyName = "projects/my-project/locations/us/keyRings/my_key_ring/cryptoKeys/my_key"
Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
byte[] data = "Hello, World!".getBytes(UTF_8);
BlobId blobId = BlobId.of(bucketName, objectName);
BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("text/plain").build();
// Optional: set a generation-match precondition to avoid potential race
// conditions and data corruptions. The request returns a 412 error if the
// preconditions are not met.
Storage.BlobTargetOption precondition;
if (storage.get(bucketName, objectName) == null) {
// For a target object that does not yet exist, set the DoesNotExist precondition.
// This will cause the request to fail if the object is created before the request runs.
precondition = Storage.BlobTargetOption.doesNotExist();
} else {
// If the destination already exists in your bucket, instead set a generation-match
// precondition. This will cause the request to fail if the existing object's generation
// changes before the request runs.
precondition =
Storage.BlobTargetOption.generationMatch(
storage.get(bucketName, objectName).getGeneration());
}
storage.create(blobInfo, data, Storage.BlobTargetOption.kmsKeyName(kmsKeyName), precondition);
System.out.println(
"Uploaded object "
+ objectName
+ " in bucket "
+ bucketName
+ " encrypted with "
+ kmsKeyName);
}
}
// [END storage_upload_with_kms_key]