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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.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "components/reporting/encryption/testing_primitives.h"
#include <cstddef>
#include <cstdint>
#include <string>
#include <string_view>
#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(uint8_t private_key[kKeySize],
uint8_t public_value[kKeySize]) {
X25519_keypair(public_value, private_key);
}
void RestoreSharedSecret(const uint8_t private_key[kKeySize],
const uint8_t peer_public_value[kKeySize],
uint8_t shared_secret[kKeySize]) {
ASSERT_TRUE(X25519(shared_secret, private_key, peer_public_value));
}
void PerformSymmetricDecryption(const uint8_t symmetric_key[kKeySize],
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(base::span(symmetric_key, kKeySize));
// 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(uint8_t private_key[kSignKeySize],
uint8_t public_value[kKeySize]) {
ED25519_keypair(public_value, private_key);
}
void SignMessage(const uint8_t signing_key[kSignKeySize],
std::string_view message,
uint8_t signature[kSignatureSize]) {
ASSERT_THAT(
ED25519_sign(signature, reinterpret_cast<const uint8_t*>(message.data()),
message.size(), signing_key),
Eq(1));
}
} // namespace test
} // namespace reporting
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