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// Copyright 2019 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 gcpkms_test
import (
"bytes"
"context"
"os"
"path/filepath"
"testing"
// Placeholder for internal flag import.
// context is used to cancel outstanding requests
"google.golang.org/api/option"
"github.com/tink-crypto/tink-go/v2/aead"
"github.com/tink-crypto/tink-go-gcpkms/v2/integration/gcpkms"
)
const (
keyURI = "gcp-kms://projects/tink-test-infrastructure/locations/global/keyRings/unit-and-integration-testing/cryptoKeys/aead-key"
)
var (
credFile = "testdata/gcp/credential.json"
)
// Placeholder for internal initialization.
func TestGetAeadWithEnvelopeAead(t *testing.T) {
srcDir, ok := os.LookupEnv("TEST_SRCDIR")
if !ok {
t.Skip("TEST_SRCDIR not set")
}
workspaceDir, ok := os.LookupEnv("TEST_WORKSPACE")
if !ok {
t.Skip("TEST_WORKSPACE not set")
}
ctx := context.Background()
gcpClient, err := gcpkms.NewClientWithOptions(
ctx, keyURI, option.WithCredentialsFile(filepath.Join(srcDir, workspaceDir, credFile)))
if err != nil {
t.Fatalf("gcpkms.NewClientWithOptions() err = %q, want nil", err)
}
kekAEAD, err := gcpClient.GetAEAD(keyURI)
if err != nil {
t.Fatalf("gcpClient.GetAEAD(keyURI) err = %q, want nil", err)
}
dekTemplate := aead.AES128CTRHMACSHA256KeyTemplate()
a := aead.NewKMSEnvelopeAEAD2(dekTemplate, kekAEAD)
if err != nil {
t.Fatalf("a.Encrypt(plaintext, associatedData) err = %q, want nil", err)
}
plaintext := []byte("message")
associatedData := []byte("example KMS envelope AEAD encryption")
ciphertext, err := a.Encrypt(plaintext, associatedData)
if err != nil {
t.Fatalf("a.Encrypt(plaintext, associatedData) err = %q, want nil", err)
}
gotPlaintext, err := a.Decrypt(ciphertext, associatedData)
if err != nil {
t.Fatalf("a.Decrypt(ciphertext, associatedData) err = %q, want nil", err)
}
if !bytes.Equal(gotPlaintext, plaintext) {
t.Errorf("a.Decrypt() = %q, want %q", gotPlaintext, plaintext)
}
_, err = a.Decrypt(ciphertext, []byte("invalid associatedData"))
if err == nil {
t.Error("a.Decrypt(ciphertext, []byte(\"invalid associatedData\")) err = nil, want error")
}
}
func TestAead(t *testing.T) {
srcDir, ok := os.LookupEnv("TEST_SRCDIR")
if !ok {
t.Skip("TEST_SRCDIR not set")
}
workspaceDir, ok := os.LookupEnv("TEST_WORKSPACE")
if !ok {
t.Skip("TEST_WORKSPACE not set")
}
ctx := context.Background()
gcpClient, err := gcpkms.NewClientWithOptions(
ctx, keyURI, option.WithCredentialsFile(filepath.Join(srcDir, workspaceDir, credFile)))
if err != nil {
t.Fatalf("gcpkms.NewClientWithOptions() err = %q, want nil", err)
}
aead, err := gcpClient.GetAEAD(keyURI)
if err != nil {
t.Fatalf("gcpClient.GetAEAD(keyURI) err = %q, want nil", err)
}
testcases := []struct {
name string
plaintext []byte
associatedData []byte
}{
{
name: "empty_plaintext",
plaintext: []byte(""),
associatedData: []byte("authenticated data"),
},
{
name: "empty_associated_data",
plaintext: []byte("plaintext"),
associatedData: []byte(""),
},
}
for _, tc := range testcases {
t.Run(tc.name, func(t *testing.T) {
ciphertext, err := aead.Encrypt(tc.plaintext, tc.associatedData)
if err != nil {
t.Fatalf("aead.Encrypt(plaintext, associatedData) err = %q, want nil", err)
}
gotPlaintext, err := aead.Decrypt(ciphertext, tc.associatedData)
if err != nil {
t.Fatalf("aead.Decrypt(ciphertext, associatedData) err = %q, want nil", err)
}
if !bytes.Equal(gotPlaintext, tc.plaintext) {
t.Errorf("aead.Decrypt() = %q, want %q", gotPlaintext, tc.plaintext)
}
})
}
}
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