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Further cleanup.

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This commit is contained in:
Nanosonde 2020-07-05 16:18:59 +02:00
parent 24b4a8d8a6
commit e8645dc5ad
5 changed files with 56 additions and 57 deletions
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26
src/knx/bau_systemB.cpp
View File

@ -83,25 +83,23 @@ void BauSystemB::sendNextGroupTelegram()
continue;
SecurityControl goSecurity;
goSecurity.toolAccess = false;
goSecurity.toolAccess = false; // Secured group communication never uses the toolkey. ETS knows all keys, also the group keys.
#ifdef USE_DATASECURE
// Get security flags from Security Interface Object for this group object
goSecurity.dataSecurity = _secIfObj.getGroupObjectSecurity(asap);
#else
goSecurity.dataSecurity = DataSecurity::none;
#endif
if (flag == WriteRequest && go.transmitEnable())
{
#ifdef USE_DATASECURE
// Get security flags from Security Interface Object for this group object
goSecurity.dataSecurity = _secIfObj.getGroupObjectSecurity(asap, true);
#endif
uint8_t* data = go.valueRef();
_appLayer.groupValueWriteRequest(AckRequested, asap, go.priority(), NetworkLayerParameter, goSecurity, data,
go.sizeInTelegram());
}
else if (flag == ReadRequest)
{
#ifdef USE_DATASECURE
// Get security flags from Security Interface Object for this group object
goSecurity.dataSecurity = _secIfObj.getGroupObjectSecurity(asap, false);
#endif
_appLayer.groupValueReadRequest(AckRequested, asap, go.priority(), NetworkLayerParameter, goSecurity);
}
@ -215,8 +213,10 @@ uint8_t BauSystemB::masterReset(EraseCode eraseCode, uint8_t channel)
println(eraseCode == EraseCode::FactoryReset ? "FactoryReset with IA" : "FactoryReset without IA");
#ifdef USE_DATASECURE
// If erase code is FactoryReset or FactoryResetWithoutIA, set FDSK as toolkey again
// and disable security mode
_secIfObj.factoryReset();
// and disable security mode.
// FIXME: the A_RestartResponse PDU has still to be sent with the current toolkey.
// Idea: use local confirmation of sent A_RestartResponse PDU to trigger writing the FDSK afterwards
_secIfObj.masterReset(eraseCode);
#endif
return successCode;
}
@ -609,7 +609,7 @@ void BauSystemB::groupValueReadIndication(uint16_t asap, Priority priority, HopC
DataSecurity requiredGoSecurity;
// Get security flags from Security Interface Object for this group object
requiredGoSecurity = _secIfObj.getGroupObjectSecurity(asap, false);
requiredGoSecurity = _secIfObj.getGroupObjectSecurity(asap);
if (secCtrl.dataSecurity != requiredGoSecurity)
{
@ -644,7 +644,7 @@ void BauSystemB::groupValueWriteIndication(uint16_t asap, Priority priority, Hop
DataSecurity requiredGoSecurity;
// Get security flags from Security Interface Object for this group object
requiredGoSecurity = _secIfObj.getGroupObjectSecurity(asap, true);
requiredGoSecurity = _secIfObj.getGroupObjectSecurity(asap);
if (secCtrl.dataSecurity != requiredGoSecurity)
{

18
src/knx/secure_application_layer.cpp
View File

@ -782,8 +782,8 @@ bool SecureApplicationLayer::decrypt(uint8_t* plainApdu, uint16_t plainApduLengt
bool syncReq = service == kSecureSyncRequest;
bool syncRes = service == kSecureSyncResponse;
//const uint8_t* key = dstAddrIsGroupAddr ? securityKey(dstAddr, dstAddrIsGroupAddr) : toolAccess ? toolKey(srcAddr == _deviceObj.induvidualAddress() ? dstAddr : srcAddr) : securityKey(srcAddr, false);
const uint8_t* key = dstAddrIsGroupAddr && (dstAddr != 0) ? securityKey(dstAddr, dstAddrIsGroupAddr) : toolAccess ? _secIfObj.toolKey(srcAddr == _deviceObj.induvidualAddress() ? dstAddr : srcAddr) : securityKey(srcAddr, false);
//const uint8_t* key = dstAddrIsGroupAddr ? securityKey(dstAddr, dstAddrIsGroupAddr) : toolAccess ? toolKey() : securityKey(srcAddr, false);
const uint8_t* key = dstAddrIsGroupAddr && (dstAddr != 0) ? securityKey(dstAddr, dstAddrIsGroupAddr) : toolAccess ? _secIfObj.toolKey() : securityKey(srcAddr, false);
if (key == nullptr)
{
print("Error: No key found. toolAccess: ");
@ -1047,7 +1047,7 @@ bool SecureApplicationLayer::secure(uint8_t* buffer, uint16_t service, uint16_t
}
}
const uint8_t* key = toolAccess ? _secIfObj.toolKey(_syncReqBroadcastIncoming ? _deviceObj.induvidualAddress() : dstAddr) : securityKey(dstAddr, dstAddrIsGroupAddr);
const uint8_t* key = toolAccess ? _secIfObj.toolKey() : securityKey(dstAddr, dstAddrIsGroupAddr);
if (key == nullptr)
{
print("Error: No key found. toolAccess: ");
@ -1231,16 +1231,6 @@ bool SecureApplicationLayer::createSecureApdu(APDU& plainApdu, APDU& secureApdu,
return false;
}
void SecureApplicationLayer::setSecurityMode(bool enabled)
{
_securityModeEnabled = enabled;
}
bool SecureApplicationLayer::isSecurityModeEnabled()
{
return _securityModeEnabled;
}
void SecureApplicationLayer::clearFailureLog()
{
println("clearFailureLog()");
@ -1282,4 +1272,4 @@ bool SecureApplicationLayer::isSyncService(APDU& secureApdu)
return false;
}
#endif
#endif

4
src/knx/secure_application_layer.h
View File

@ -30,8 +30,6 @@ class SecureApplicationLayer : public ApplicationLayer
*/
SecureApplicationLayer(DeviceObject& deviceObj, SecurityInterfaceObject& secIfObj, AssociationTableObject& assocTable, AddressTableObject& addrTab, BusAccessUnit& bau);
void setSecurityMode(bool enabled);
bool isSecurityModeEnabled();
void clearFailureLog();
void getFailureCounters(uint8_t* data);
uint8_t getFromFailureLogByIndex(uint8_t index, uint8_t* data, uint8_t maxDataLen);
@ -137,8 +135,6 @@ class SecureApplicationLayer : public ApplicationLayer
void encryptAesCbc(uint8_t* buffer, uint16_t bufLen, const uint8_t* iv, const uint8_t* key);
void xcryptAesCtr(uint8_t* buffer, uint16_t bufLen, const uint8_t* iv, const uint8_t* key);
bool _securityModeEnabled {false};
bool _syncReqBroadcastIncoming{false};
bool _syncReqBroadcastOutgoing{false};
uint32_t _lastSyncRes;

53
src/knx/security_interface_object.cpp
View File

@ -52,7 +52,7 @@ SecurityInterfaceObject::SecurityInterfaceObject()
resultLength = 1;
return;
}
obj->_secAppLayer->setSecurityMode(mode == 1);
obj->setSecurityMode(mode == 1);
resultData[0] = ReturnCodes::Success;
resultData[1] = serviceId;
resultLength = 2;
@ -74,7 +74,7 @@ SecurityInterfaceObject::SecurityInterfaceObject()
{
resultData[0] = ReturnCodes::Success;
resultData[1] = serviceId;
resultData[2] = obj->_secAppLayer->isSecurityModeEnabled() ? 1 : 0;
resultData[2] = obj->isSecurityModeEnabled() ? 1 : 0;
resultLength = 3;
return;
}
@ -171,6 +171,7 @@ void SecurityInterfaceObject::secureApplicationLayer(SecureApplicationLayer& sec
uint8_t* SecurityInterfaceObject::save(uint8_t* buffer)
{
buffer = pushByte(_state, buffer);
buffer = pushByte(_securityModeEnabled, buffer);
return InterfaceObject::save(buffer);
}
@ -181,12 +182,28 @@ const uint8_t* SecurityInterfaceObject::restore(const uint8_t* buffer)
buffer = popByte(state, buffer);
_state = (LoadState)state;
uint8_t securityModeEnabled = 0;
buffer = popByte(securityModeEnabled, buffer);
_securityModeEnabled = securityModeEnabled;
return InterfaceObject::restore(buffer);
}
uint16_t SecurityInterfaceObject::saveSize()
{
return 1 + InterfaceObject::saveSize();
return 2 + InterfaceObject::saveSize();
}
void SecurityInterfaceObject::setSecurityMode(bool enabled)
{
print("Security mode set to: ");
println(enabled ? "enabled" : "disabled");
_securityModeEnabled = enabled;
}
bool SecurityInterfaceObject::isSecurityModeEnabled()
{
return _securityModeEnabled;
}
bool SecurityInterfaceObject::isLoaded()
@ -314,16 +331,17 @@ void SecurityInterfaceObject::errorCode(ErrorCode errorCode)
prop->write(data);
}
void SecurityInterfaceObject::factoryReset()
void SecurityInterfaceObject::masterReset(EraseCode eraseCode)
{
// TODO handle different erase codes
println("Factory reset of security interface object requested.");
_secAppLayer->setSecurityMode(false);
setSecurityMode(false);
property(PID_TOOL_KEY)->write(1, 1, _fdsk);
}
const uint8_t* SecurityInterfaceObject::toolKey(uint16_t devAddr)
const uint8_t* SecurityInterfaceObject::toolKey()
{
//TODO: check if multiple tool keys possible, leave it for now
// There is only one tool key
const uint8_t* toolKey = propertyData(PID_TOOL_KEY);
return toolKey;
}
@ -341,7 +359,7 @@ const uint8_t* SecurityInterfaceObject::p2pKey(uint16_t addressIndex)
uint8_t elementSize = propertySize(PID_P2P_KEY_TABLE);
// Search for address index
uint8_t entry[elementSize]; // 2 bytes index + keysize (16 bytes) + 2 bytes(for what?) = 20 bytes
uint8_t entry[elementSize]; // 2 bytes index + keysize (16 bytes) + 2 bytes(roles) = 20 bytes
for (int i = 1; i <= numElements; i++)
{
property(PID_P2P_KEY_TABLE)->read(i, 1, entry);
@ -498,7 +516,7 @@ void SecurityInterfaceObject::setLastValidSequenceNumber(uint16_t deviceAddr, ui
}
}
DataSecurity SecurityInterfaceObject::getGroupObjectSecurity(uint16_t index, bool isWrite)
DataSecurity SecurityInterfaceObject::getGroupObjectSecurity(uint16_t index)
{
// security table uses same index as group object table
@ -508,20 +526,9 @@ DataSecurity SecurityInterfaceObject::getGroupObjectSecurity(uint16_t index, boo
if (count > 0)
{
bool conf;
bool auth;
if (isWrite)
{
// write access flags, draft spec. p.68
conf = (data[0] & 2) == 2;
auth = (data[0] & 1) == 1;
}
else
{
// Read access flags, draft spec. p.68
conf = (data[0] & 8) == 8;
auth = (data[0] & 4) == 4;
}
// write access flags, approved spec. AN158, p.97
bool conf = (data[0] & 2) == 2;
bool auth = (data[0] & 1) == 1;
return conf ? DataSecurity::authConf : auth ? DataSecurity::auth : DataSecurity::none;
}

12
src/knx/security_interface_object.h
View File

@ -15,11 +15,13 @@ public:
void secureApplicationLayer(SecureApplicationLayer& secAppLayer);
void factoryReset();
void masterReset(EraseCode eraseCode);
bool isSecurityModeEnabled();
bool isLoaded();
const uint8_t* toolKey(uint16_t devAddr); // returns single tool key (ETS)
const uint8_t* toolKey(); // returns single tool key (ETS)
const uint8_t* p2pKey(uint16_t addressIndex); // returns p2p key for IA index
const uint8_t* groupKey(uint16_t addressIndex); // returns group key for group address index
@ -29,7 +31,7 @@ public:
uint64_t getLastValidSequenceNumber(uint16_t deviceAddr);
void setLastValidSequenceNumber(uint16_t deviceAddr, uint64_t seqNum);
DataSecurity getGroupObjectSecurity(uint16_t index, bool isWrite);
DataSecurity getGroupObjectSecurity(uint16_t index);
LoadState loadState();
uint8_t* save(uint8_t* buffer) override;
@ -39,6 +41,8 @@ public:
private:
SecureApplicationLayer* _secAppLayer = nullptr;
void setSecurityMode(bool enabled);
void errorCode(ErrorCode errorCode);
void loadEvent(const uint8_t* data);
@ -50,6 +54,8 @@ private:
void loadState(LoadState newState);
LoadState _state = LS_UNLOADED;
bool _securityModeEnabled {false};
uint16_t getNumberOfElements(PropertyID propId);
// Our FDSK