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CHIPDeviceController.cpp
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/*
*
* Copyright (c) 2020-2022 Project CHIP Authors
* Copyright (c) 2013-2017 Nest Labs, Inc.
* All rights reserved.
*
* 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.
*/
/**
* @file
* Implementation of CHIP Device Controller, a common class
* that implements discovery, pairing and provisioning of CHIP
* devices.
*
*/
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS
#endif
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
// module header, comes first
#include <controller/CHIPDeviceController.h>
#include <app-common/zap-generated/ids/Attributes.h>
#include <app-common/zap-generated/ids/Clusters.h>
#include <app/InteractionModelEngine.h>
#include <app/OperationalSessionSetup.h>
#include <app/server/Dnssd.h>
#include <controller/CurrentFabricRemover.h>
#include <controller/InvokeInteraction.h>
#include <credentials/CHIPCert.h>
#include <credentials/DeviceAttestationCredsProvider.h>
#include <crypto/CHIPCryptoPAL.h>
#include <lib/core/CHIPCore.h>
#include <lib/core/CHIPEncoding.h>
#include <lib/core/CHIPSafeCasts.h>
#include <lib/core/ErrorStr.h>
#include <lib/core/NodeId.h>
#include <lib/support/Base64.h>
#include <lib/support/CHIPArgParser.hpp>
#include <lib/support/CHIPMem.h>
#include <lib/support/CodeUtils.h>
#include <lib/support/PersistentStorageMacros.h>
#include <lib/support/SafeInt.h>
#include <lib/support/ScopedBuffer.h>
#include <lib/support/ThreadOperationalDataset.h>
#include <lib/support/TimeUtils.h>
#include <lib/support/logging/CHIPLogging.h>
#include <messaging/ExchangeContext.h>
#include <platform/LockTracker.h>
#include <protocols/secure_channel/MessageCounterManager.h>
#include <setup_payload/QRCodeSetupPayloadParser.h>
#include <tracing/macros.h>
#if CONFIG_NETWORK_LAYER_BLE
#include <ble/BleLayer.h>
#include <transport/raw/BLE.h>
#endif
#include <errno.h>
#include <inttypes.h>
#include <memory>
#include <stdint.h>
#include <stdlib.h>
#include <time.h>
using namespace chip::Inet;
using namespace chip::System;
using namespace chip::Transport;
using namespace chip::Credentials;
using namespace chip::app::Clusters;
namespace chip {
namespace Controller {
using namespace chip::Encoding;
#if CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY
using namespace chip::Protocols::UserDirectedCommissioning;
#endif // CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY
DeviceController::DeviceController()
{
mState = State::NotInitialized;
}
CHIP_ERROR DeviceController::Init(ControllerInitParams params)
{
assertChipStackLockedByCurrentThread();
VerifyOrReturnError(mState == State::NotInitialized, CHIP_ERROR_INCORRECT_STATE);
VerifyOrReturnError(params.systemState != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
VerifyOrReturnError(params.systemState->SystemLayer() != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
VerifyOrReturnError(params.systemState->UDPEndPointManager() != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
#if CONFIG_NETWORK_LAYER_BLE
VerifyOrReturnError(params.systemState->BleLayer() != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
#endif
VerifyOrReturnError(params.systemState->TransportMgr() != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
ReturnErrorOnFailure(mDNSResolver.Init(params.systemState->UDPEndPointManager()));
mDNSResolver.SetCommissioningDelegate(this);
RegisterDeviceDiscoveryDelegate(params.deviceDiscoveryDelegate);
VerifyOrReturnError(params.operationalCredentialsDelegate != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
mOperationalCredentialsDelegate = params.operationalCredentialsDelegate;
mVendorId = params.controllerVendorId;
if (params.operationalKeypair != nullptr || !params.controllerNOC.empty() || !params.controllerRCAC.empty())
{
ReturnErrorOnFailure(InitControllerNOCChain(params));
}
mSystemState = params.systemState->Retain();
mState = State::Initialized;
mRemoveFromFabricTableOnShutdown = params.removeFromFabricTableOnShutdown;
if (GetFabricIndex() != kUndefinedFabricIndex)
{
ChipLogProgress(Controller,
"Joined the fabric at index %d. Fabric ID is 0x" ChipLogFormatX64
" (Compressed Fabric ID: " ChipLogFormatX64 ")",
GetFabricIndex(), ChipLogValueX64(GetFabricId()), ChipLogValueX64(GetCompressedFabricId()));
}
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceController::InitControllerNOCChain(const ControllerInitParams & params)
{
FabricInfo newFabric;
constexpr uint32_t chipCertAllocatedLen = kMaxCHIPCertLength;
chip::Platform::ScopedMemoryBuffer<uint8_t> rcacBuf;
chip::Platform::ScopedMemoryBuffer<uint8_t> icacBuf;
chip::Platform::ScopedMemoryBuffer<uint8_t> nocBuf;
Credentials::P256PublicKeySpan rootPublicKeySpan;
FabricId fabricId;
NodeId nodeId;
bool hasExternallyOwnedKeypair = false;
Crypto::P256Keypair * externalOperationalKeypair = nullptr;
VendorId newFabricVendorId = params.controllerVendorId;
// There are three possibilities here in terms of what happens with our
// operational key:
// 1) We have an externally owned operational keypair.
// 2) We have an operational keypair that the fabric table should clone via
// serialize/deserialize.
// 3) We have no keypair at all, and the fabric table has been initialized
// with a key store.
if (params.operationalKeypair != nullptr)
{
hasExternallyOwnedKeypair = params.hasExternallyOwnedOperationalKeypair;
externalOperationalKeypair = params.operationalKeypair;
}
ReturnErrorCodeIf(!rcacBuf.Alloc(chipCertAllocatedLen), CHIP_ERROR_NO_MEMORY);
ReturnErrorCodeIf(!icacBuf.Alloc(chipCertAllocatedLen), CHIP_ERROR_NO_MEMORY);
ReturnErrorCodeIf(!nocBuf.Alloc(chipCertAllocatedLen), CHIP_ERROR_NO_MEMORY);
MutableByteSpan rcacSpan(rcacBuf.Get(), chipCertAllocatedLen);
ReturnErrorOnFailure(ConvertX509CertToChipCert(params.controllerRCAC, rcacSpan));
ReturnErrorOnFailure(Credentials::ExtractPublicKeyFromChipCert(rcacSpan, rootPublicKeySpan));
Crypto::P256PublicKey rootPublicKey{ rootPublicKeySpan };
MutableByteSpan icacSpan;
if (params.controllerICAC.empty())
{
ChipLogProgress(Controller, "Intermediate CA is not needed");
}
else
{
icacSpan = MutableByteSpan(icacBuf.Get(), chipCertAllocatedLen);
ReturnErrorOnFailure(ConvertX509CertToChipCert(params.controllerICAC, icacSpan));
}
MutableByteSpan nocSpan = MutableByteSpan(nocBuf.Get(), chipCertAllocatedLen);
ReturnErrorOnFailure(ConvertX509CertToChipCert(params.controllerNOC, nocSpan));
ReturnErrorOnFailure(ExtractNodeIdFabricIdFromOpCert(nocSpan, &nodeId, &fabricId));
auto * fabricTable = params.systemState->Fabrics();
const FabricInfo * fabricInfo = nullptr;
//
// When multiple controllers are permitted on the same fabric, we need to find fabrics with
// nodeId as an extra discriminant since we can have multiple FabricInfo objects that all
// collide on the same fabric. Not doing so may result in a match with an existing FabricInfo
// instance that matches the fabric in the provided NOC but is associated with a different NodeId
// that is already in use by another active controller instance. That will effectively cause it
// to change its identity inadvertently, which is not acceptable.
//
// TODO: Figure out how to clean up unreclaimed FabricInfos restored from persistent
// storage that are not in use by active DeviceController instances. Also, figure out
// how to reclaim FabricInfo slots when a DeviceController instance is deleted.
//
if (params.permitMultiControllerFabrics)
{
fabricInfo = fabricTable->FindIdentity(rootPublicKey, fabricId, nodeId);
}
else
{
fabricInfo = fabricTable->FindFabric(rootPublicKey, fabricId);
}
bool fabricFoundInTable = (fabricInfo != nullptr);
FabricIndex fabricIndex = fabricFoundInTable ? fabricInfo->GetFabricIndex() : kUndefinedFabricIndex;
CHIP_ERROR err = CHIP_NO_ERROR;
auto advertiseOperational =
params.enableServerInteractions ? FabricTable::AdvertiseIdentity::Yes : FabricTable::AdvertiseIdentity::No;
//
// We permit colliding fabrics when multiple controllers are present on the same logical fabric
// since each controller is associated with a unique FabricInfo 'identity' object and consequently,
// a unique FabricIndex.
//
// This sets a flag that will be cleared automatically when the fabric is committed/reverted later
// in this function.
//
if (params.permitMultiControllerFabrics)
{
fabricTable->PermitCollidingFabrics();
}
// We have 4 cases to handle legacy usage of direct operational key injection
if (externalOperationalKeypair)
{
// Cases 1 and 2: Injected operational keys
// CASE 1: Fabric update with injected key
if (fabricFoundInTable)
{
err = fabricTable->UpdatePendingFabricWithProvidedOpKey(fabricIndex, nocSpan, icacSpan, externalOperationalKeypair,
hasExternallyOwnedKeypair, advertiseOperational);
}
else
// CASE 2: New fabric with injected key
{
err = fabricTable->AddNewPendingTrustedRootCert(rcacSpan);
if (err == CHIP_NO_ERROR)
{
err = fabricTable->AddNewPendingFabricWithProvidedOpKey(nocSpan, icacSpan, newFabricVendorId,
externalOperationalKeypair, hasExternallyOwnedKeypair,
&fabricIndex, advertiseOperational);
}
}
}
else
{
// Cases 3 and 4: OperationalKeystore has the keys
// CASE 3: Fabric update with operational keystore
if (fabricFoundInTable)
{
VerifyOrReturnError(fabricTable->HasOperationalKeyForFabric(fabricIndex), CHIP_ERROR_KEY_NOT_FOUND);
err = fabricTable->UpdatePendingFabricWithOperationalKeystore(fabricIndex, nocSpan, icacSpan, advertiseOperational);
}
else
// CASE 4: New fabric with operational keystore
{
err = fabricTable->AddNewPendingTrustedRootCert(rcacSpan);
if (err == CHIP_NO_ERROR)
{
err = fabricTable->AddNewPendingFabricWithOperationalKeystore(nocSpan, icacSpan, newFabricVendorId, &fabricIndex,
advertiseOperational);
}
if (err == CHIP_NO_ERROR)
{
// Now that we know our planned fabric index, verify that the
// keystore has a key for it.
if (!fabricTable->HasOperationalKeyForFabric(fabricIndex))
{
err = CHIP_ERROR_KEY_NOT_FOUND;
}
}
}
}
// Commit after setup, error-out on failure.
if (err == CHIP_NO_ERROR)
{
// No need to revert on error: CommitPendingFabricData reverts internally on *any* error.
err = fabricTable->CommitPendingFabricData();
}
else
{
fabricTable->RevertPendingFabricData();
}
ReturnErrorOnFailure(err);
VerifyOrReturnError(fabricIndex != kUndefinedFabricIndex, CHIP_ERROR_INTERNAL);
mFabricIndex = fabricIndex;
return CHIP_NO_ERROR;
}
void DeviceController::Shutdown()
{
assertChipStackLockedByCurrentThread();
VerifyOrReturn(mState != State::NotInitialized);
ChipLogDetail(Controller, "Shutting down the controller");
mState = State::NotInitialized;
if (mFabricIndex != kUndefinedFabricIndex)
{
// Shut down any subscription clients for this fabric.
app::InteractionModelEngine::GetInstance()->ShutdownSubscriptions(mFabricIndex);
// Shut down any ongoing CASE session activity we have. We're going to
// assume that all sessions for our fabric belong to us here.
mSystemState->CASESessionMgr()->ReleaseSessionsForFabric(mFabricIndex);
// TODO: The CASE session manager does not shut down existing CASE
// sessions. It just shuts down any ongoing CASE session establishment
// we're in the middle of as initiator. Maybe it should shut down
// existing sessions too?
mSystemState->SessionMgr()->ExpireAllSessionsForFabric(mFabricIndex);
if (mRemoveFromFabricTableOnShutdown)
{
FabricTable * fabricTable = mSystemState->Fabrics();
if (fabricTable != nullptr)
{
fabricTable->Forget(mFabricIndex);
}
}
}
mSystemState->Release();
mSystemState = nullptr;
mDNSResolver.Shutdown();
mDeviceDiscoveryDelegate = nullptr;
}
CHIP_ERROR DeviceController::GetPeerAddressAndPort(NodeId peerId, Inet::IPAddress & addr, uint16_t & port)
{
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
Transport::PeerAddress peerAddr;
ReturnErrorOnFailure(mSystemState->CASESessionMgr()->GetPeerAddress(GetPeerScopedId(peerId), peerAddr));
addr = peerAddr.GetIPAddress();
port = peerAddr.GetPort();
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceController::GetPeerAddress(NodeId nodeId, Transport::PeerAddress & addr)
{
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
ReturnErrorOnFailure(mSystemState->CASESessionMgr()->GetPeerAddress(GetPeerScopedId(nodeId), addr));
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceController::ComputePASEVerifier(uint32_t iterations, uint32_t setupPincode, const ByteSpan & salt,
Spake2pVerifier & outVerifier)
{
ReturnErrorOnFailure(PASESession::GeneratePASEVerifier(outVerifier, iterations, salt, /* useRandomPIN= */ false, setupPincode));
return CHIP_NO_ERROR;
}
ControllerDeviceInitParams DeviceController::GetControllerDeviceInitParams()
{
return ControllerDeviceInitParams{
.sessionManager = mSystemState->SessionMgr(),
.exchangeMgr = mSystemState->ExchangeMgr(),
};
}
DeviceCommissioner::DeviceCommissioner() :
mOnDeviceConnectedCallback(OnDeviceConnectedFn, this), mOnDeviceConnectionFailureCallback(OnDeviceConnectionFailureFn, this),
#if CHIP_DEVICE_CONFIG_ENABLE_AUTOMATIC_CASE_RETRIES
mOnDeviceConnectionRetryCallback(OnDeviceConnectionRetryFn, this),
#endif // CHIP_DEVICE_CONFIG_ENABLE_AUTOMATIC_CASE_RETRIES
mDeviceAttestationInformationVerificationCallback(OnDeviceAttestationInformationVerification, this),
mDeviceNOCChainCallback(OnDeviceNOCChainGeneration, this), mSetUpCodePairer(this)
{}
CHIP_ERROR DeviceCommissioner::Init(CommissionerInitParams params)
{
ReturnErrorOnFailure(DeviceController::Init(params));
mPairingDelegate = params.pairingDelegate;
// Configure device attestation validation
mDeviceAttestationVerifier = params.deviceAttestationVerifier;
if (mDeviceAttestationVerifier == nullptr)
{
mDeviceAttestationVerifier = Credentials::GetDeviceAttestationVerifier();
if (mDeviceAttestationVerifier == nullptr)
{
ChipLogError(Controller,
"Missing DeviceAttestationVerifier configuration at DeviceCommissioner init and none set with "
"Credentials::SetDeviceAttestationVerifier()!");
return CHIP_ERROR_INVALID_ARGUMENT;
}
// We fell back on a default from singleton accessor.
ChipLogProgress(Controller,
"*** Missing DeviceAttestationVerifier configuration at DeviceCommissioner init: using global default, "
"consider passing one in CommissionerInitParams.");
}
if (params.defaultCommissioner != nullptr)
{
mDefaultCommissioner = params.defaultCommissioner;
}
else
{
mDefaultCommissioner = &mAutoCommissioner;
}
#if CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY // make this commissioner discoverable
mUdcTransportMgr = chip::Platform::New<UdcTransportMgr>();
ReturnErrorOnFailure(mUdcTransportMgr->Init(Transport::UdpListenParameters(mSystemState->UDPEndPointManager())
.SetAddressType(Inet::IPAddressType::kIPv6)
.SetListenPort(static_cast<uint16_t>(mUdcListenPort))
#if INET_CONFIG_ENABLE_IPV4
,
Transport::UdpListenParameters(mSystemState->UDPEndPointManager())
.SetAddressType(Inet::IPAddressType::kIPv4)
.SetListenPort(static_cast<uint16_t>(mUdcListenPort))
#endif // INET_CONFIG_ENABLE_IPV4
));
mUdcServer = chip::Platform::New<UserDirectedCommissioningServer>();
mUdcTransportMgr->SetSessionManager(mUdcServer);
mUdcServer->SetTransportManager(mUdcTransportMgr);
mUdcServer->SetInstanceNameResolver(this);
#endif // CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY
mSetUpCodePairer.SetSystemLayer(mSystemState->SystemLayer());
#if CONFIG_NETWORK_LAYER_BLE
mSetUpCodePairer.SetBleLayer(mSystemState->BleLayer());
#endif // CONFIG_NETWORK_LAYER_BLE
return CHIP_NO_ERROR;
}
void DeviceCommissioner::Shutdown()
{
VerifyOrReturn(mState != State::NotInitialized);
ChipLogDetail(Controller, "Shutting down the commissioner");
mSetUpCodePairer.StopPairing();
// Check to see if pairing in progress before shutting down
CommissioneeDeviceProxy * device = mDeviceInPASEEstablishment;
if (device != nullptr && device->IsSessionSetupInProgress())
{
ChipLogDetail(Controller, "Setup in progress, stopping setup before shutting down");
OnSessionEstablishmentError(CHIP_ERROR_CONNECTION_ABORTED);
}
CancelCommissioningInteractions();
#if CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY // make this commissioner discoverable
if (mUdcTransportMgr != nullptr)
{
chip::Platform::Delete(mUdcTransportMgr);
mUdcTransportMgr = nullptr;
}
if (mUdcServer != nullptr)
{
mUdcServer->SetInstanceNameResolver(nullptr);
chip::Platform::Delete(mUdcServer);
mUdcServer = nullptr;
}
#endif // CHIP_DEVICE_CONFIG_ENABLE_COMMISSIONER_DISCOVERY
// Release everything from the commissionee device pool here.
// Make sure to use ReleaseCommissioneeDevice so we don't keep dangling
// pointers to the device objects.
mCommissioneeDevicePool.ForEachActiveObject([this](auto * commissioneeDevice) {
ReleaseCommissioneeDevice(commissioneeDevice);
return Loop::Continue;
});
DeviceController::Shutdown();
}
CommissioneeDeviceProxy * DeviceCommissioner::FindCommissioneeDevice(NodeId id)
{
MATTER_TRACE_SCOPE("FindCommissioneeDevice", "DeviceCommissioner");
CommissioneeDeviceProxy * foundDevice = nullptr;
mCommissioneeDevicePool.ForEachActiveObject([&](auto * deviceProxy) {
if (deviceProxy->GetDeviceId() == id)
{
foundDevice = deviceProxy;
return Loop::Break;
}
return Loop::Continue;
});
return foundDevice;
}
CommissioneeDeviceProxy * DeviceCommissioner::FindCommissioneeDevice(const Transport::PeerAddress & peerAddress)
{
CommissioneeDeviceProxy * foundDevice = nullptr;
mCommissioneeDevicePool.ForEachActiveObject([&](auto * deviceProxy) {
if (deviceProxy->GetPeerAddress() == peerAddress)
{
foundDevice = deviceProxy;
return Loop::Break;
}
return Loop::Continue;
});
return foundDevice;
}
void DeviceCommissioner::ReleaseCommissioneeDevice(CommissioneeDeviceProxy * device)
{
#if CONFIG_NETWORK_LAYER_BLE
if (mSystemState->BleLayer() != nullptr && device->GetDeviceTransportType() == Transport::Type::kBle)
{
// We only support one BLE connection, so if this is BLE, close it
ChipLogProgress(Discovery, "Closing all BLE connections");
mSystemState->BleLayer()->CloseAllBleConnections();
}
#endif
// Make sure that there will be no dangling pointer
if (mDeviceInPASEEstablishment == device)
{
mDeviceInPASEEstablishment = nullptr;
}
if (mDeviceBeingCommissioned == device)
{
mDeviceBeingCommissioned = nullptr;
}
// Release the commissionee device after we have nulled out our pointers,
// because that can call back in to us with error notifications as the
// session is released.
mCommissioneeDevicePool.ReleaseObject(device);
}
CHIP_ERROR DeviceCommissioner::GetDeviceBeingCommissioned(NodeId deviceId, CommissioneeDeviceProxy ** out_device)
{
VerifyOrReturnError(out_device != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
CommissioneeDeviceProxy * device = FindCommissioneeDevice(deviceId);
VerifyOrReturnError(device != nullptr, CHIP_ERROR_INVALID_ARGUMENT);
*out_device = device;
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceCommissioner::PairDevice(NodeId remoteDeviceId, const char * setUpCode, const CommissioningParameters & params,
DiscoveryType discoveryType, Optional<Dnssd::CommonResolutionData> resolutionData)
{
MATTER_TRACE_SCOPE("PairDevice", "DeviceCommissioner");
if (mDefaultCommissioner == nullptr)
{
ChipLogError(Controller, "No default commissioner is specified");
return CHIP_ERROR_INCORRECT_STATE;
}
ReturnErrorOnFailure(mDefaultCommissioner->SetCommissioningParameters(params));
return mSetUpCodePairer.PairDevice(remoteDeviceId, setUpCode, SetupCodePairerBehaviour::kCommission, discoveryType,
resolutionData);
}
CHIP_ERROR DeviceCommissioner::PairDevice(NodeId remoteDeviceId, const char * setUpCode, DiscoveryType discoveryType,
Optional<Dnssd::CommonResolutionData> resolutionData)
{
MATTER_TRACE_SCOPE("PairDevice", "DeviceCommissioner");
return mSetUpCodePairer.PairDevice(remoteDeviceId, setUpCode, SetupCodePairerBehaviour::kCommission, discoveryType,
resolutionData);
}
CHIP_ERROR DeviceCommissioner::PairDevice(NodeId remoteDeviceId, RendezvousParameters & params)
{
MATTER_TRACE_SCOPE("PairDevice", "DeviceCommissioner");
ReturnErrorOnFailure(EstablishPASEConnection(remoteDeviceId, params));
return Commission(remoteDeviceId);
}
CHIP_ERROR DeviceCommissioner::PairDevice(NodeId remoteDeviceId, RendezvousParameters & rendezvousParams,
CommissioningParameters & commissioningParams)
{
MATTER_TRACE_SCOPE("PairDevice", "DeviceCommissioner");
ReturnErrorOnFailure(EstablishPASEConnection(remoteDeviceId, rendezvousParams));
return Commission(remoteDeviceId, commissioningParams);
}
CHIP_ERROR DeviceCommissioner::EstablishPASEConnection(NodeId remoteDeviceId, const char * setUpCode, DiscoveryType discoveryType,
Optional<Dnssd::CommonResolutionData> resolutionData)
{
MATTER_TRACE_SCOPE("EstablishPASEConnection", "DeviceCommissioner");
return mSetUpCodePairer.PairDevice(remoteDeviceId, setUpCode, SetupCodePairerBehaviour::kPaseOnly, discoveryType,
resolutionData);
}
CHIP_ERROR DeviceCommissioner::EstablishPASEConnection(NodeId remoteDeviceId, RendezvousParameters & params)
{
MATTER_TRACE_SCOPE("EstablishPASEConnection", "DeviceCommissioner");
CHIP_ERROR err = CHIP_NO_ERROR;
CommissioneeDeviceProxy * device = nullptr;
CommissioneeDeviceProxy * current = nullptr;
Transport::PeerAddress peerAddress = Transport::PeerAddress::UDP(Inet::IPAddress::Any);
Messaging::ExchangeContext * exchangeCtxt = nullptr;
Optional<SessionHandle> session;
VerifyOrExit(mState == State::Initialized, err = CHIP_ERROR_INCORRECT_STATE);
VerifyOrExit(mDeviceInPASEEstablishment == nullptr, err = CHIP_ERROR_INCORRECT_STATE);
// TODO(#13940): We need to specify the peer address for BLE transport in bindings.
if (params.GetPeerAddress().GetTransportType() == Transport::Type::kBle ||
params.GetPeerAddress().GetTransportType() == Transport::Type::kUndefined)
{
#if CONFIG_NETWORK_LAYER_BLE
#if CHIP_DEVICE_CONFIG_ENABLE_BOTH_COMMISSIONER_AND_COMMISSIONEE
ConnectBleTransportToSelf();
#endif // CHIP_DEVICE_CONFIG_ENABLE_BOTH_COMMISSIONER_AND_COMMISSIONEE
if (!params.HasBleLayer())
{
params.SetPeerAddress(Transport::PeerAddress::BLE());
}
peerAddress = Transport::PeerAddress::BLE();
#endif // CONFIG_NETWORK_LAYER_BLE
}
else if (params.GetPeerAddress().GetTransportType() == Transport::Type::kTcp ||
params.GetPeerAddress().GetTransportType() == Transport::Type::kUdp)
{
peerAddress = Transport::PeerAddress::UDP(params.GetPeerAddress().GetIPAddress(), params.GetPeerAddress().GetPort(),
params.GetPeerAddress().GetInterface());
}
current = FindCommissioneeDevice(peerAddress);
if (current != nullptr)
{
if (current->GetDeviceId() == remoteDeviceId)
{
// We might be able to just reuse its connection if it has one or is
// working on one.
if (current->IsSecureConnected())
{
if (mPairingDelegate)
{
// We already have an open secure session to this device, call the callback immediately and early return.
mPairingDelegate->OnPairingComplete(CHIP_NO_ERROR);
}
return CHIP_NO_ERROR;
}
if (current->IsSessionSetupInProgress())
{
// We're not connected yet, but we're in the process of connecting. Pairing delegate will get a callback when
// connection completes
return CHIP_NO_ERROR;
}
}
// Either the consumer wants to assign a different device id to this
// peer address now (so we can't reuse the commissionee device we have
// already) or something has gone strange. Delete the old device, try
// again.
ChipLogError(Controller, "Found unconnected device, removing");
ReleaseCommissioneeDevice(current);
}
device = mCommissioneeDevicePool.CreateObject();
VerifyOrExit(device != nullptr, err = CHIP_ERROR_NO_MEMORY);
mDeviceInPASEEstablishment = device;
device->Init(GetControllerDeviceInitParams(), remoteDeviceId, peerAddress);
device->UpdateDeviceData(params.GetPeerAddress(), params.GetMRPConfig());
#if CONFIG_NETWORK_LAYER_BLE
if (params.GetPeerAddress().GetTransportType() == Transport::Type::kBle)
{
if (params.HasConnectionObject())
{
SuccessOrExit(err = mSystemState->BleLayer()->NewBleConnectionByObject(params.GetConnectionObject()));
}
else if (params.HasDiscoveredObject())
{
// The RendezvousParameters argument needs to be recovered if the search succeed, so save them
// for later.
mRendezvousParametersForDeviceDiscoveredOverBle = params;
SuccessOrExit(err = mSystemState->BleLayer()->NewBleConnectionByObject(params.GetDiscoveredObject(), this,
OnDiscoveredDeviceOverBleSuccess,
OnDiscoveredDeviceOverBleError));
ExitNow(CHIP_NO_ERROR);
}
else if (params.HasDiscriminator())
{
// The RendezvousParameters argument needs to be recovered if the search succeed, so save them
// for later.
mRendezvousParametersForDeviceDiscoveredOverBle = params;
SetupDiscriminator discriminator;
discriminator.SetLongValue(params.GetDiscriminator());
SuccessOrExit(err = mSystemState->BleLayer()->NewBleConnectionByDiscriminator(
discriminator, this, OnDiscoveredDeviceOverBleSuccess, OnDiscoveredDeviceOverBleError));
ExitNow(CHIP_NO_ERROR);
}
else
{
ExitNow(err = CHIP_ERROR_INVALID_ARGUMENT);
}
}
#endif
session = mSystemState->SessionMgr()->CreateUnauthenticatedSession(params.GetPeerAddress(), params.GetMRPConfig());
VerifyOrExit(session.HasValue(), err = CHIP_ERROR_NO_MEMORY);
// Allocate the exchange immediately before calling PASESession::Pair.
//
// PASESession::Pair takes ownership of the exchange and will free it on
// error, but can only do this if it is actually called. Allocating the
// exchange context right before calling Pair ensures that if allocation
// succeeds, PASESession has taken ownership.
exchangeCtxt = mSystemState->ExchangeMgr()->NewContext(session.Value(), &device->GetPairing());
VerifyOrExit(exchangeCtxt != nullptr, err = CHIP_ERROR_INTERNAL);
err = device->GetPairing().Pair(*mSystemState->SessionMgr(), params.GetSetupPINCode(), GetLocalMRPConfig(), exchangeCtxt, this);
SuccessOrExit(err);
exit:
if (err != CHIP_NO_ERROR)
{
if (device != nullptr)
{
ReleaseCommissioneeDevice(device);
}
}
return err;
}
#if CONFIG_NETWORK_LAYER_BLE
void DeviceCommissioner::OnDiscoveredDeviceOverBleSuccess(void * appState, BLE_CONNECTION_OBJECT connObj)
{
auto self = static_cast<DeviceCommissioner *>(appState);
auto device = self->mDeviceInPASEEstablishment;
if (nullptr != device && device->GetDeviceTransportType() == Transport::Type::kBle)
{
auto remoteId = device->GetDeviceId();
auto params = self->mRendezvousParametersForDeviceDiscoveredOverBle;
params.SetConnectionObject(connObj);
self->mRendezvousParametersForDeviceDiscoveredOverBle = RendezvousParameters();
self->ReleaseCommissioneeDevice(device);
LogErrorOnFailure(self->EstablishPASEConnection(remoteId, params));
}
}
void DeviceCommissioner::OnDiscoveredDeviceOverBleError(void * appState, CHIP_ERROR err)
{
auto self = static_cast<DeviceCommissioner *>(appState);
auto device = self->mDeviceInPASEEstablishment;
if (nullptr != device && device->GetDeviceTransportType() == Transport::Type::kBle)
{
self->ReleaseCommissioneeDevice(device);
self->mRendezvousParametersForDeviceDiscoveredOverBle = RendezvousParameters();
// Callback is required when BLE discovery fails, otherwise the caller will always be in a suspended state
// A better way to handle it should define a new error code
if (self->mPairingDelegate != nullptr)
{
self->mPairingDelegate->OnPairingComplete(err);
}
}
}
#endif // CONFIG_NETWORK_LAYER_BLE
CHIP_ERROR DeviceCommissioner::Commission(NodeId remoteDeviceId, CommissioningParameters & params)
{
if (mDefaultCommissioner == nullptr)
{
ChipLogError(Controller, "No default commissioner is specified");
return CHIP_ERROR_INCORRECT_STATE;
}
ReturnErrorOnFailure(mDefaultCommissioner->SetCommissioningParameters(params));
return Commission(remoteDeviceId);
}
CHIP_ERROR DeviceCommissioner::Commission(NodeId remoteDeviceId)
{
MATTER_TRACE_SCOPE("Commission", "DeviceCommissioner");
if (mDefaultCommissioner == nullptr)
{
ChipLogError(Controller, "No default commissioner is specified");
return CHIP_ERROR_INCORRECT_STATE;
}
CommissioneeDeviceProxy * device = FindCommissioneeDevice(remoteDeviceId);
if (device == nullptr || (!device->IsSecureConnected() && !device->IsSessionSetupInProgress()))
{
ChipLogError(Controller, "Invalid device for commissioning " ChipLogFormatX64, ChipLogValueX64(remoteDeviceId));
return CHIP_ERROR_INCORRECT_STATE;
}
if (!device->IsSecureConnected() && device != mDeviceInPASEEstablishment)
{
// We should not end up in this state because we won't attempt to establish more than one connection at a time.
ChipLogError(Controller, "Device is not connected and not being paired " ChipLogFormatX64, ChipLogValueX64(remoteDeviceId));
return CHIP_ERROR_INCORRECT_STATE;
}
if (mCommissioningStage != CommissioningStage::kSecurePairing)
{
ChipLogError(Controller, "Commissioning already in progress (stage '%s') - not restarting",
StageToString(mCommissioningStage));
return CHIP_ERROR_INCORRECT_STATE;
}
ChipLogProgress(Controller, "Commission called for node ID 0x" ChipLogFormatX64, ChipLogValueX64(remoteDeviceId));
mDefaultCommissioner->SetOperationalCredentialsDelegate(mOperationalCredentialsDelegate);
if (device->IsSecureConnected())
{
mDefaultCommissioner->StartCommissioning(this, device);
}
else
{
mRunCommissioningAfterConnection = true;
}
return CHIP_NO_ERROR;
}
CHIP_ERROR
DeviceCommissioner::ContinueCommissioningAfterDeviceAttestation(DeviceProxy * device,
Credentials::AttestationVerificationResult attestationResult)
{
MATTER_TRACE_SCOPE("continueCommissioningDevice", "DeviceCommissioner");
if (mDefaultCommissioner == nullptr)
{
ChipLogError(Controller, "No default commissioner is specified");
return CHIP_ERROR_INCORRECT_STATE;
}
if (device == nullptr || device != mDeviceBeingCommissioned)
{
ChipLogError(Controller, "Invalid device for commissioning %p", device);
return CHIP_ERROR_INCORRECT_STATE;
}
CommissioneeDeviceProxy * commissioneeDevice = FindCommissioneeDevice(device->GetDeviceId());
if (commissioneeDevice == nullptr)
{
ChipLogError(Controller, "Couldn't find commissionee device");
return CHIP_ERROR_INCORRECT_STATE;
}
if (!commissioneeDevice->IsSecureConnected() || commissioneeDevice != mDeviceBeingCommissioned)
{
ChipLogError(Controller, "Invalid device for commissioning after attestation failure: 0x" ChipLogFormatX64,
ChipLogValueX64(commissioneeDevice->GetDeviceId()));
return CHIP_ERROR_INCORRECT_STATE;
}
if (mCommissioningStage != CommissioningStage::kAttestationVerification)
{
ChipLogError(Controller, "Commissioning is not attestation verification phase");
return CHIP_ERROR_INCORRECT_STATE;
}
ChipLogProgress(Controller, "Continuing commissioning after attestation failure for device ID 0x" ChipLogFormatX64,
ChipLogValueX64(commissioneeDevice->GetDeviceId()));
if (attestationResult != AttestationVerificationResult::kSuccess)
{
ChipLogError(Controller, "Client selected error: %u for failed 'Attestation Information' for device",
to_underlying(attestationResult));
CommissioningDelegate::CommissioningReport report;
report.Set<AttestationErrorInfo>(attestationResult);
CommissioningStageComplete(CHIP_ERROR_INTERNAL, report);
}
else
{
ChipLogProgress(Controller, "Overriding attestation failure per client and continuing commissioning");
CommissioningStageComplete(CHIP_NO_ERROR);
}
return CHIP_NO_ERROR;
}
CHIP_ERROR DeviceCommissioner::StopPairing(NodeId remoteDeviceId)
{
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
VerifyOrReturnError(remoteDeviceId != kUndefinedNodeId, CHIP_ERROR_INVALID_ARGUMENT);
ChipLogProgress(Controller, "StopPairing called for node ID 0x" ChipLogFormatX64, ChipLogValueX64(remoteDeviceId));
// If we're still in the process of discovering the device, just stop the SetUpCodePairer
if (mSetUpCodePairer.StopPairing(remoteDeviceId))
{
mRunCommissioningAfterConnection = false;
return CHIP_NO_ERROR;
}
// Otherwise we might be pairing and / or commissioning it.
CommissioneeDeviceProxy * device = FindCommissioneeDevice(remoteDeviceId);
VerifyOrReturnError(device != nullptr, CHIP_ERROR_INVALID_DEVICE_DESCRIPTOR);
if (mDeviceBeingCommissioned == device)
{
CancelCommissioningInteractions();
CommissioningStageComplete(CHIP_ERROR_CANCELLED);
}
else
{
ReleaseCommissioneeDevice(device);
}
return CHIP_NO_ERROR;
}
void DeviceCommissioner::CancelCommissioningInteractions()
{
if (mReadClient)
{
ChipLogDetail(Controller, "Cancelling read request for step '%s'", StageToString(mCommissioningStage));
mReadClient.reset(); // destructor cancels
}
if (mInvokeCancelFn)
{
ChipLogDetail(Controller, "Cancelling command invocation for step '%s'", StageToString(mCommissioningStage));
mInvokeCancelFn();
mInvokeCancelFn = nullptr;
}
}
CHIP_ERROR DeviceCommissioner::UnpairDevice(NodeId remoteDeviceId)
{
MATTER_TRACE_SCOPE("UnpairDevice", "DeviceCommissioner");
VerifyOrReturnError(mState == State::Initialized, CHIP_ERROR_INCORRECT_STATE);
return AutoCurrentFabricRemover::RemoveCurrentFabric(this, remoteDeviceId);
}
void DeviceCommissioner::RendezvousCleanup(CHIP_ERROR status)
{
if (mDeviceInPASEEstablishment != nullptr)
{
// Release the commissionee device. For BLE, this is stored,
// for IP commissioning, we have taken a reference to the
// operational node to send the completion command.
ReleaseCommissioneeDevice(mDeviceInPASEEstablishment);
if (mPairingDelegate != nullptr)
{
mPairingDelegate->OnPairingComplete(status);
}
}
}
void DeviceCommissioner::OnSessionEstablishmentError(CHIP_ERROR err)
{
if (mPairingDelegate != nullptr)
{
mPairingDelegate->OnStatusUpdate(DevicePairingDelegate::SecurePairingFailed);
}
RendezvousCleanup(err);
}
void DeviceCommissioner::OnSessionEstablished(const SessionHandle & session)
{
// PASE session established.
CommissioneeDeviceProxy * device = mDeviceInPASEEstablishment;
// We are in the callback for this pairing. Reset so we can pair another device.
mDeviceInPASEEstablishment = nullptr;
VerifyOrReturn(device != nullptr, OnSessionEstablishmentError(CHIP_ERROR_INVALID_DEVICE_DESCRIPTOR));