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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "crypto/aead.h"
#include <string>
#include "testing/gtest/include/gtest/gtest.h"
namespace {
const crypto::Aead::AeadAlgorithm kAllAlgorithms[]{
crypto::Aead::AES_128_CTR_HMAC_SHA256,
crypto::Aead::AES_256_GCM,
crypto::Aead::AES_256_GCM_SIV,
crypto::Aead::CHACHA20_POLY1305,
};
class AeadTest : public testing::TestWithParam<crypto::Aead::AeadAlgorithm> {};
INSTANTIATE_TEST_SUITE_P(All, AeadTest, testing::ValuesIn(kAllAlgorithms));
TEST_P(AeadTest, SealOpen) {
crypto::Aead::AeadAlgorithm alg = GetParam();
crypto::Aead aead(alg);
std::string key(aead.KeyLength(), 0);
aead.Init(&key);
std::string nonce(aead.NonceLength(), 0);
std::string plaintext("this is the plaintext");
std::string ad("this is the additional data");
std::string ciphertext;
EXPECT_TRUE(aead.Seal(plaintext, nonce, ad, &ciphertext));
EXPECT_LT(0U, ciphertext.size());
std::string decrypted;
EXPECT_TRUE(aead.Open(ciphertext, nonce, ad, &decrypted));
EXPECT_EQ(plaintext, decrypted);
}
TEST_P(AeadTest, SealOpenSpan) {
crypto::Aead::AeadAlgorithm alg = GetParam();
crypto::Aead aead(alg);
std::vector<uint8_t> key(aead.KeyLength(), 0u);
aead.Init(key);
std::vector<uint8_t> nonce(aead.NonceLength(), 0u);
static constexpr uint8_t kPlaintext[] = "plaintext";
static constexpr uint8_t kAdditionalData[] = "additional data input";
std::vector<uint8_t> ciphertext =
aead.Seal(kPlaintext, nonce, kAdditionalData);
EXPECT_LT(sizeof(kPlaintext), ciphertext.size());
absl::optional<std::vector<uint8_t>> decrypted =
aead.Open(ciphertext, nonce, kAdditionalData);
ASSERT_TRUE(decrypted);
ASSERT_EQ(decrypted->size(), sizeof(kPlaintext));
ASSERT_EQ(0, memcmp(decrypted->data(), kPlaintext, sizeof(kPlaintext)));
std::vector<uint8_t> wrong_key(aead.KeyLength(), 1u);
crypto::Aead aead_wrong_key(alg);
aead_wrong_key.Init(wrong_key);
decrypted = aead_wrong_key.Open(ciphertext, nonce, kAdditionalData);
EXPECT_FALSE(decrypted);
}
TEST_P(AeadTest, SealOpenWrongKey) {
crypto::Aead::AeadAlgorithm alg = GetParam();
crypto::Aead aead(alg);
std::string key(aead.KeyLength(), 0);
std::string wrong_key(aead.KeyLength(), 1);
aead.Init(&key);
crypto::Aead aead_wrong_key(alg);
aead_wrong_key.Init(&wrong_key);
std::string nonce(aead.NonceLength(), 0);
std::string plaintext("this is the plaintext");
std::string ad("this is the additional data");
std::string ciphertext;
EXPECT_TRUE(aead.Seal(plaintext, nonce, ad, &ciphertext));
EXPECT_LT(0U, ciphertext.size());
std::string decrypted;
EXPECT_FALSE(aead_wrong_key.Open(ciphertext, nonce, ad, &decrypted));
EXPECT_EQ(0U, decrypted.size());
}
} // namespace
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