1 // Copyright 2022 Google LLC
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 #include "tink/aead/failing_aead.h"
17
18 #include <memory>
19 #include <string>
20 #include <utility>
21
22 #include "absl/strings/string_view.h"
23
24 namespace crypto {
25 namespace tink {
26 namespace {
27
28 // An AEAD that always returns a kInternal status on API calls.
29 class AlwaysFailAead : public Aead {
30 public:
AlwaysFailAead(std::string message)31 explicit AlwaysFailAead(std::string message)
32 : message_(std::move(message)) {}
33
Encrypt(absl::string_view plaintext,absl::string_view associated_data) const34 util::StatusOr<std::string> Encrypt(
35 absl::string_view plaintext,
36 absl::string_view associated_data) const override {
37 return util::Status(
38 absl::StatusCode::kInternal,
39 absl::StrCat(
40 "AlwaysFailAead will always fail on encrypt (msg=", message_, ")"));
41 }
42
Decrypt(absl::string_view ciphertext,absl::string_view associated_data) const43 util::StatusOr<std::string> Decrypt(
44 absl::string_view ciphertext,
45 absl::string_view associated_data) const override {
46 return util::Status(
47 absl::StatusCode::kInternal,
48 absl::StrCat(
49 "AlwaysFailAead will always fail on decrypt (msg=", message_, ")"));
50 }
51
52 private:
53 const std::string message_;
54 };
55
56 } // namespace
57
CreateAlwaysFailingAead(absl::string_view message)58 std::unique_ptr<Aead> CreateAlwaysFailingAead(absl::string_view message) {
59 return absl::make_unique<AlwaysFailAead>(std::string(message));
60 }
61
62 } // namespace tink
63 } // namespace crypto
64