1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
// Copyright 2018 Google Inc.
//
// 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.
//
////////////////////////////////////////////////////////////////////////////////
#include "tink/subtle/aes_gcm_siv_boringssl.h"
#include <memory>
#include <string>
#include <vector>
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "absl/status/status.h"
#include "absl/strings/escaping.h"
#include "absl/strings/str_cat.h"
#include "tink/aead/internal/wycheproof_aead.h"
#include "tink/config/tink_fips.h"
#include "tink/internal/ssl_util.h"
#include "tink/subtle/subtle_util.h"
#include "tink/util/secret_data.h"
#include "tink/util/statusor.h"
#include "tink/util/test_matchers.h"
namespace crypto {
namespace tink {
namespace subtle {
namespace {
constexpr absl::string_view kKey256Hex =
"000102030405060708090a0b0c0d0e0f000102030405060708090a0b0c0d0e0f";
constexpr absl::string_view kMessage = "Some data to encrypt.";
constexpr absl::string_view kAssociatedData = "Some data to authenticate.";
constexpr int kIvSizeInBytes = 12;
constexpr int kTagSizeInBytes = 16;
using ::crypto::tink::test::IsOk;
using ::crypto::tink::test::StatusIs;
using ::testing::AllOf;
using ::testing::Eq;
using ::testing::Not;
using ::testing::SizeIs;
using ::testing::TestWithParam;
using ::testing::ValuesIn;
TEST(AesGcmSivBoringSslTest, EncryptDecrypt) {
if (IsFipsModeEnabled()) {
GTEST_SKIP() << "Not supported in FIPS-only mode";
}
util::SecretData key =
util::SecretDataFromStringView(absl::HexStringToBytes(kKey256Hex));
if (!internal::IsBoringSsl()) {
EXPECT_THAT(AesGcmSivBoringSsl::New(key).status(),
StatusIs(absl::StatusCode::kUnimplemented));
} else {
util::StatusOr<std::unique_ptr<Aead>> aead = AesGcmSivBoringSsl::New(key);
ASSERT_THAT(aead, IsOk());
util::StatusOr<std::string> ciphertext =
(*aead)->Encrypt(kMessage, kAssociatedData);
ASSERT_THAT(ciphertext, IsOk());
EXPECT_THAT(*ciphertext,
SizeIs(kMessage.size() + kIvSizeInBytes + kTagSizeInBytes));
util::StatusOr<std::string> plaintext =
(*aead)->Decrypt(*ciphertext, kAssociatedData);
ASSERT_THAT(plaintext, IsOk());
EXPECT_EQ(*plaintext, kMessage);
}
}
TEST(AesGcmSivBoringSslTest, DecryptFailsIfCiphertextTooSmall) {
if (!internal::IsBoringSsl()) {
GTEST_SKIP() << "Unimplemented with OpenSSL";
}
if (IsFipsModeEnabled()) {
GTEST_SKIP() << "Not supported in FIPS-only mode";
}
util::SecretData key =
util::SecretDataFromStringView(absl::HexStringToBytes(kKey256Hex));
util::StatusOr<std::unique_ptr<Aead>> aead = AesGcmSivBoringSsl::New(key);
ASSERT_THAT(aead, IsOk());
for (int i = 1; i < kIvSizeInBytes + kTagSizeInBytes; i++) {
std::string ciphertext;
ResizeStringUninitialized(&ciphertext, i);
EXPECT_THAT((*aead)->Decrypt(ciphertext, kAssociatedData).status(),
StatusIs(absl::StatusCode::kInvalidArgument));
}
}
TEST(AesGcmSivBoringSslTest, TestFipsOnly) {
if (!internal::IsBoringSsl()) {
GTEST_SKIP() << "Unimplemented with OpenSSL";
}
if (!IsFipsModeEnabled()) {
GTEST_SKIP() << "Only supported in FIPS-only mode";
}
util::SecretData key128 = util::SecretDataFromStringView(
absl::HexStringToBytes("000102030405060708090a0b0c0d0e0f"));
util::SecretData key256 =
util::SecretDataFromStringView(absl::HexStringToBytes(
"000102030405060708090a0b0c0d0e0f000102030405060708090a0b0c0d0e0f"));
EXPECT_THAT(AesGcmSivBoringSsl::New(key128).status(),
StatusIs(absl::StatusCode::kInternal));
EXPECT_THAT(AesGcmSivBoringSsl::New(key256).status(),
StatusIs(absl::StatusCode::kInternal));
}
class AesGcmSivBoringSslWycheproofTest
: public TestWithParam<internal::WycheproofTestVector> {
void SetUp() override {
if (!internal::IsBoringSsl()) {
GTEST_SKIP() << "Unimplemented with OpenSSL";
}
if (IsFipsModeEnabled()) {
GTEST_SKIP() << "Not supported in FIPS-only mode";
}
internal::WycheproofTestVector test_vector = GetParam();
if ((test_vector.key.size() != 16 && test_vector.key.size() != 32) ||
test_vector.nonce.size() != kIvSizeInBytes ||
test_vector.tag.size() != kTagSizeInBytes) {
GTEST_SKIP() << "Unsupported parameters: key size "
<< test_vector.key.size()
<< " nonce size: " << test_vector.nonce.size()
<< " tag size: " << test_vector.tag.size();
}
}
};
TEST_P(AesGcmSivBoringSslWycheproofTest, Decrypt) {
internal::WycheproofTestVector test_vector = GetParam();
util::SecretData key = util::SecretDataFromStringView(test_vector.key);
util::StatusOr<std::unique_ptr<Aead>> cipher = AesGcmSivBoringSsl::New(key);
ASSERT_THAT(cipher, IsOk());
std::string ciphertext =
absl::StrCat(test_vector.nonce, test_vector.ct, test_vector.tag);
util::StatusOr<std::string> plaintext =
(*cipher)->Decrypt(ciphertext, test_vector.aad);
if (plaintext.ok()) {
EXPECT_NE(test_vector.expected, "invalid");
EXPECT_EQ(*plaintext, test_vector.msg);
} else {
EXPECT_THAT(test_vector.expected, Not(AllOf(Eq("valid"), Eq("acceptable"))))
<< "Could not decrypt test with tcId: " << test_vector.id
<< " iv_size: " << test_vector.nonce.size()
<< " tag_size: " << test_vector.tag.size()
<< " key_size: " << key.size() << "; error: " << plaintext.status();
}
}
INSTANTIATE_TEST_SUITE_P(AesGcmSivBoringSslWycheproofTests,
AesGcmSivBoringSslWycheproofTest,
ValuesIn(internal::ReadWycheproofTestVectors(
/*file_name=*/"aes_gcm_siv_test.json")));
} // namespace
} // namespace subtle
} // namespace tink
} // namespace crypto
|
