src/core/crypto/storage.cpp

/*
 *  Copyright (c) 2021, The OpenThread Authors.
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 *     derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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/**
 * @file
 *   This file includes implementation for Crypto Internal Trusted Storage (ITS) APIs.
 */

#include "crypto/storage.hpp"

#include "common/debug.hpp"

namespace ot {
namespace Crypto {

#if OPENTHREAD_CONFIG_PLATFORM_KEY_REFERENCES_ENABLE
Error Key::ExtractKey(uint8_t *aKeyBuffer, uint16_t &aKeyLength) const
{
    Error  error;
    size_t readKeyLength;

    OT_ASSERT(IsKeyRef());

    SuccessOrAssert(Crypto::Storage::ExportKey(GetKeyRef(), aKeyBuffer, aKeyLength, readKeyLength));

    VerifyOrExit(readKeyLength <= aKeyLength, error = kErrorNoBufs);

    aKeyLength = static_cast<uint16_t>(readKeyLength);

exit:
    return error;
}
#endif

LiteralKey::LiteralKey(const Key &aKey)
    : mKey(aKey.GetBytes())
    , mLength(aKey.GetLength())
{
#if OPENTHREAD_CONFIG_PLATFORM_KEY_REFERENCES_ENABLE
    if (aKey.IsKeyRef())
    {
        mKey    = mBuffer;
        mLength = sizeof(mBuffer);
        SuccessOrAssert(aKey.ExtractKey(mBuffer, mLength));
    }
#endif
}

} // namespace Crypto
} // namespace ot