/*

 *

 *    Copyright (c) 2021 Project CHIP Authors

 *

 *    Licensed under the Apache License, Version 2.0 (the "License");

 *    you may not use this file except in compliance with the License.

 *    You may obtain a copy of the License at

 *

 *        http://www.apache.org/licenses/LICENSE-2.0

 *

 *    Unless required by applicable law or agreed to in writing, software

 *    distributed under the License is distributed on an "AS IS" BASIS,

 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 *    See the License for the specific language governing permissions and

 *    limitations under the License.

 */

#include "DeviceAttestationCredsProvider.h"

namespace chip {

namespace Credentials {

namespace {

// Version to have a default placeholder so the getter never

// returns `nullptr` by default.

class UnimplementedDACProvider : public DeviceAttestationCredentialsProvider

{

public:

    CHIP_ERROR GetCertificationDeclaration(MutableByteSpan & out_cd_buffer) override

    {

        (void) out_cd_buffer;

        return CHIP_ERROR_NOT_IMPLEMENTED;

    }

    CHIP_ERROR GetFirmwareInformation(MutableByteSpan & out_firmware_info_buffer) override

    {

        (void) out_firmware_info_buffer;

        return CHIP_ERROR_NOT_IMPLEMENTED;

    }

    CHIP_ERROR GetDeviceAttestationCert(MutableByteSpan & out_dac_buffer) override

    {

        (void) out_dac_buffer;

        return CHIP_ERROR_NOT_IMPLEMENTED;

    }

    CHIP_ERROR GetProductAttestationIntermediateCert(MutableByteSpan & out_pai_buffer) override

    {

        (void) out_pai_buffer;

        return CHIP_ERROR_NOT_IMPLEMENTED;

    }

    CHIP_ERROR SignWithDeviceAttestationKey(const ByteSpan & message_to_sign, MutableByteSpan & out_signature_buffer) override

    {

        (void) message_to_sign;

        (void) out_signature_buffer;

        return CHIP_ERROR_NOT_IMPLEMENTED;

    }

};

// Default to avoid nullptr on getter and cleanly handle new products/clients before

// they provide their own.

UnimplementedDACProvider gDefaultDACProvider;

DeviceAttestationCredentialsProvider * gDacProvider = &gDefaultDACProvider;

} // namespace

DeviceAttestationCredentialsProvider * GetDeviceAttestationCredentialsProvider()

{

    return gDacProvider;

}

void SetDeviceAttestationCredentialsProvider(DeviceAttestationCredentialsProvider * provider)

{

    if (provider == nullptr)

    {

        return;

    }

    gDacProvider = provider;

}

bool IsDeviceAttestationCredentialsProviderSet()

{

    return (gDacProvider != &gDefaultDACProvider);

}

} // namespace Credentials

} // namespace chip