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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/reporting/encryption/testing_primitives.h"
#include <cstddef>
#include <cstdint>
#include <string>
#include <string_view>
#include "base/check_op.h"
#include "components/reporting/encryption/primitives.h"
#include "crypto/aead.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/boringssl/src/include/openssl/curve25519.h"
#include "third_party/boringssl/src/include/openssl/digest.h"
#include "third_party/boringssl/src/include/openssl/hkdf.h"
using ::testing::Eq;
using ::testing::Ge;
using ::testing::Gt;
using ::testing::Ne;
namespace reporting {
namespace test {
void GenerateEncryptionKeyPair(base::span<uint8_t, kKeySize> private_key,
base::span<uint8_t, kKeySize> public_value) {
X25519_keypair(public_value.data(), private_key.data());
}
// TODO(https://issues.chromium.org/issues/431824286): use crypto/keyexchange
void RestoreSharedSecret(base::span<const uint8_t, kKeySize> private_key,
base::span<const uint8_t, kKeySize> peer_public_value,
base::span<uint8_t, kKeySize> shared_secret) {
ASSERT_TRUE(X25519(shared_secret.data(), private_key.data(),
peer_public_value.data()));
}
void PerformSymmetricDecryption(base::span<const uint8_t, kKeySize> key,
std::string_view input_data,
std::string* output_data) {
// Decrypt the data with symmetric key using AEAD interface.
crypto::Aead aead(crypto::Aead::CHACHA20_POLY1305);
CHECK_EQ(aead.KeyLength(), kKeySize);
// Use the symmetric key for data decryption.
aead.Init(key);
// Get nonce at the head of input_data.
CHECK_EQ(aead.NonceLength(), kNonceSize);
std::string_view nonce = input_data.substr(0, kNonceSize);
// Decrypt collected record.
std::string decrypted;
ASSERT_TRUE(aead.Open(input_data.substr(kNonceSize), nonce, std::string(),
output_data));
}
void GenerateSigningKeyPair(base::span<uint8_t, kSignKeySize> private_key,
base::span<uint8_t, kKeySize> public_value) {
ED25519_keypair(public_value.data(), private_key.data());
}
void SignMessage(base::span<const uint8_t, kSignKeySize> signing_key,
std::string_view message,
base::span<uint8_t, kSignatureSize> signature) {
ASSERT_THAT(ED25519_sign(signature.data(),
reinterpret_cast<const uint8_t*>(message.data()),
message.size(), signing_key.data()),
Eq(1));
}
} // namespace test
} // namespace reporting
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