File: p256_key_util.h

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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.

#ifndef COMPONENTS_GCM_DRIVER_CRYPTO_P256_KEY_UTIL_H_
#define COMPONENTS_GCM_DRIVER_CRYPTO_P256_KEY_UTIL_H_

#include <string>
#include <string_view>

#include "crypto/keypair.h"

namespace gcm {

// Computes the shared secret between |key| and |peer_public_key|.The
// |peer_public_key| must be an octet string in uncompressed form per
// SEC1 2.3.3.
//
// Returns whether the secret could be computed, and was written to the out
// argument.
[[nodiscard]] bool ComputeSharedP256Secret(crypto::keypair::PrivateKey key,
                                           std::string_view peer_public_key,
                                           std::string* out_shared_secret);

}  // namespace gcm

#endif  // COMPONENTS_GCM_DRIVER_CRYPTO_P256_KEY_UTIL_H_