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/*
* Copyright 2021 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 kms;
// [START kms_verify_mac]
import com.google.cloud.kms.v1.CryptoKeyVersionName;
import com.google.cloud.kms.v1.KeyManagementServiceClient;
import com.google.cloud.kms.v1.MacVerifyResponse;
import com.google.protobuf.ByteString;
import java.io.IOException;
public class VerifyMac {
public void verifyMac() 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";
String data = "Data to sign";
byte[] signature = null;
verifyMac(projectId, locationId, keyRingId, keyId, keyVersionId, data, signature);
}
// Sign data with a given mac key.
public void verifyMac(
String projectId,
String locationId,
String keyRingId,
String keyId,
String keyVersionId,
String data,
byte[] signature)
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 key version name from the project, location, key ring, key,
// and key version.
CryptoKeyVersionName keyVersionName =
CryptoKeyVersionName.of(projectId, locationId, keyRingId, keyId, keyVersionId);
// Verify the signature
MacVerifyResponse response =
client.macVerify(
keyVersionName, ByteString.copyFromUtf8(data), ByteString.copyFrom(signature));
// The data comes back as raw bytes, which may include non-printable
// characters. This base64-encodes the result so it can be printed below.
System.out.printf("Success: %s%n", response.getSuccess());
}
}
}
// [END kms_verify_mac]