chromium/components/gcm_driver/crypto/p256_key_util.cc

// 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 "components/gcm_driver/crypto/p256_key_util.h"

#include <stddef.h>
#include <stdint.h>

#include <memory>
#include <string_view>
#include <vector>

#include "base/logging.h"
#include "base/strings/string_util.h"
#include "crypto/ec_private_key.h"
#include "third_party/boringssl/src/include/openssl/ec.h"
#include "third_party/boringssl/src/include/openssl/ecdh.h"
#include "third_party/boringssl/src/include/openssl/evp.h"

namespace gcm {

namespace {

// A P-256 field element consists of 32 bytes.
const size_t kFieldBytes = …;

// A P-256 point in uncompressed form consists of 0x04 (to denote that the point
// is uncompressed per SEC1 2.3.3) followed by two, 32-byte field elements.
const size_t kUncompressedPointBytes = …;

}  // namespace

bool GetRawPublicKey(const crypto::ECPrivateKey& key, std::string* public_key) { … }

// TODO(peter): Get rid of this once all key management code has been updated
// to use ECPrivateKey instead of std::string.
bool GetRawPrivateKey(const crypto::ECPrivateKey& key,
                      std::string* private_key) { … }

bool ComputeSharedP256Secret(crypto::ECPrivateKey& key,
                             std::string_view peer_public_key,
                             std::string* out_shared_secret) { … }

}  // namespace gcm