xref: /aosp_15_r20/external/tink/go/integration/gcpkms/gcp_kms_client_test.go (revision e7b1675dde1b92d52ec075b0a92829627f2c52a5)
1// Copyright 2017 Google Inc.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//      http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14//
15////////////////////////////////////////////////////////////////////////////////
16
17package gcpkms_test
18
19import (
20	"context"
21	"log"
22
23	"google.golang.org/api/option"
24	"github.com/google/tink/go/aead"
25	"github.com/google/tink/go/integration/gcpkms"
26)
27
28func Example() {
29	const keyURI = "gcp-kms://......"
30	ctx := context.Background()
31	gcpclient, err := gcpkms.NewClientWithOptions(ctx, keyURI, option.WithCredentialsFile("/mysecurestorage/credentials.json"))
32	if err != nil {
33		log.Fatal(err)
34	}
35	kekAEAD, err := gcpclient.GetAEAD(keyURI)
36	if err != nil {
37		log.Fatal(err)
38	}
39
40	// Get the KMS envelope AEAD primitive.
41	dekTemplate := aead.AES128CTRHMACSHA256KeyTemplate()
42	primitive := aead.NewKMSEnvelopeAEAD2(dekTemplate, kekAEAD)
43	if err != nil {
44		log.Fatal(err)
45	}
46
47	// Use the primitive.
48	plaintext := []byte("message")
49	associatedData := []byte("example KMS envelope AEAD encryption")
50
51	ciphertext, err := primitive.Encrypt(plaintext, associatedData)
52	if err != nil {
53		log.Fatal(err)
54	}
55
56	_, err = primitive.Decrypt(ciphertext, associatedData)
57	if err != nil {
58		log.Fatal(err)
59	}
60}
61