1/*
2 * Copyright 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "ecies_kem.h"
18
19#include <gtest/gtest.h>
20#include <openssl/evp.h>
21
22#include <hardware/keymaster_defs.h>
23#include <keymaster/android_keymaster_utils.h>
24
25#include "android_keymaster_test_utils.h"
26#include "nist_curve_key_exchange.h"
27
28using std::string;
29
30namespace keymaster {
31namespace test {
32
33StdoutLogger logger;
34
35static const keymaster_ec_curve_t kEcCurves[] = {KM_EC_CURVE_P_224, KM_EC_CURVE_P_256,
36                                                 KM_EC_CURVE_P_384, KM_EC_CURVE_P_521};
37
38/**
39 * TestConsistency just tests that the basic key encapsulation hold.
40 */
41TEST(EciesKem, TestConsistency) {
42    static const uint32_t kKeyLen = 32;
43    for (auto& curve : kEcCurves) {
44        AuthorizationSet kem_description(AuthorizationSetBuilder()
45                                             .Authorization(TAG_EC_CURVE, curve)
46                                             .Authorization(TAG_KDF, KM_KDF_RFC5869_SHA256)
47                                             .Authorization(TAG_ECIES_SINGLE_HASH_MODE)
48                                             .Authorization(TAG_KEY_SIZE, kKeyLen));
49        keymaster_error_t error;
50        EciesKem* kem = new EciesKem(kem_description, &error);
51        ASSERT_EQ(KM_ERROR_OK, error);
52
53        NistCurveKeyExchange* key_exchange = NistCurveKeyExchange::GenerateKeyExchange(curve);
54        Buffer peer_public_value;
55        ASSERT_TRUE(key_exchange->public_value(&peer_public_value));
56
57        Buffer output_clear_key;
58        Buffer output_encrypted_key;
59        ASSERT_TRUE(kem->Encrypt(peer_public_value, &output_clear_key, &output_encrypted_key));
60        ASSERT_EQ(kKeyLen, output_clear_key.available_read());
61        ASSERT_EQ(peer_public_value.available_read(), output_encrypted_key.available_read());
62
63        Buffer decrypted_clear_key;
64        ASSERT_TRUE(
65            kem->Decrypt(key_exchange->private_key(), output_encrypted_key, &decrypted_clear_key));
66        ASSERT_EQ(kKeyLen, decrypted_clear_key.available_read());
67        EXPECT_EQ(0, memcmp(output_clear_key.peek_read(), decrypted_clear_key.peek_read(),
68                            output_clear_key.available_read()));
69    }
70}
71
72}  // namespace test
73}  // namespace keymaster
74