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This commit is contained in:
Nanosonde 2020-07-01 21:48:28 +02:00
parent 8a34040631
commit ec3999357e
11 changed files with 278 additions and 131 deletions
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2
src/knx/bau_systemB.cpp
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@ -18,7 +18,7 @@ BauSystemB::BauSystemB(Platform& platform): _memory(platform, _deviceObj), _addr
_assocTable(_memory), _groupObjTable(_memory), _appProgram(_memory),
_platform(platform),
#ifdef USE_DATASECURE
_appLayer(_deviceObj, _secIfObj, _assocTable, *this),
_appLayer(_deviceObj, _secIfObj, _assocTable, _addrTable, *this),
#else
_appLayer(_assocTable, *this),
#endif

21
src/knx/bits.cpp
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@ -84,3 +84,24 @@ uint32_t getInt(const uint8_t * data)
{
return (data[0] << 24) + (data[1] << 16) + (data[2] << 8) + data[3];
}
void sixBytesFromUInt64(uint64_t num, uint8_t* toByteArray)
{
toByteArray[0] = ((num >> 40) & 0xff);
toByteArray[1] = ((num >> 32) & 0xff);
toByteArray[2] = ((num >> 24) & 0xff);
toByteArray[3] = ((num >> 16) & 0xff);
toByteArray[4] = ((num >> 8) & 0xff);
toByteArray[5] = (num & 0xff);
}
uint64_t sixBytesToUInt64(uint8_t* data)
{
uint64_t l = 0;
for (uint8_t i = 0; i < 6; i++)
{
l = (l << 8) + data[i];
}
return l;
}

3
src/knx/bits.h
View File

@ -85,3 +85,6 @@ uint8_t* pushByteArray(const uint8_t* src, uint32_t size, uint8_t* data);
uint16_t getWord(const uint8_t* data);
uint32_t getInt(const uint8_t* data);
void printHex(const char* suffix, const uint8_t *data, size_t length);
void sixBytesFromUInt64(uint64_t num, uint8_t* toByteArray);
uint64_t sixBytesToUInt64(uint8_t* data);

10
src/knx/data_property.cpp
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@ -151,3 +151,13 @@ const uint8_t* DataProperty::data()
{
return _data;
}
const uint8_t* DataProperty::data(uint16_t elementIndex)
{
if ((elementIndex == 0) || (elementIndex > _currentElements))
return nullptr;
elementIndex -= 1; // Starting from 0
uint16_t offset = elementIndex * ElementSize();
return _data + offset;
}

1
src/knx/data_property.h
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@ -17,6 +17,7 @@ class DataProperty : public Property
virtual const uint8_t* restore(const uint8_t* buffer) override;
virtual uint16_t saveSize() override;
const uint8_t* data();
const uint8_t* data(uint16_t elementIndex);
private:
uint16_t _currentElements = 0;

6
src/knx/interface_object.cpp
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@ -190,3 +190,9 @@ const uint8_t* InterfaceObject::propertyData(PropertyID id)
DataProperty* prop = (DataProperty*)property(id);
return prop->data();
}
const uint8_t* InterfaceObject::propertyData(PropertyID id, uint16_t elementIndex)
{
DataProperty* prop = (DataProperty*)property(id);
return prop->data(elementIndex);
}

1
src/knx/interface_object.h
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@ -172,6 +172,7 @@ class InterfaceObject : public SaveRestore
}
const uint8_t* propertyData(PropertyID id);
const uint8_t* propertyData(PropertyID id, uint16_t elementIndex);
/**
* Gets const property with PropertyID id if it exists and nullptr otherwise.
*/

159
src/knx/secure_application_layer.cpp
View File

@ -2,6 +2,7 @@
#include "transport_layer.h"
#include "cemi_frame.h"
#include "association_table_object.h"
#include "address_table_object.h"
#include "security_interface_object.h"
#include "device_object.h"
#include "apdu.h"
@ -15,22 +16,16 @@
#define ECB 0
#include "aes.hpp"
const uint8_t SecureDataPdu = 0;
const uint8_t SecureSyncRequest = 2;
const uint8_t SecureSyncResponse = 3;
static constexpr uint8_t kSecureDataPdu = 0;
static constexpr uint8_t kSecureSyncRequest = 2;
static constexpr uint8_t kSecureSyncResponse = 3;
uint64_t sequenceNumberToolAccess = 50;
uint64_t sequenceNumber = 0;
uint64_t lastValidSequenceNumberTool = 0;
uint64_t lastValidSequenceNumber = 0;
SecureApplicationLayer::SecureApplicationLayer(DeviceObject &deviceObj, SecurityInterfaceObject &secIfObj, AssociationTableObject& assocTable, BusAccessUnit& bau):
SecureApplicationLayer::SecureApplicationLayer(DeviceObject &deviceObj, SecurityInterfaceObject &secIfObj, AssociationTableObject& assocTable, AddressTableObject &addrTab, BusAccessUnit& bau):
ApplicationLayer(assocTable, bau),
_secIfObj(secIfObj),
_deviceObj(deviceObj)
_deviceObj(deviceObj),
_addrTab(addrTab)
{
}
/* from transport layer */
@ -501,62 +496,9 @@ void SecureApplicationLayer::blockCtr0(uint8_t* buffer, uint8_t* seqNum, uint16_
pBuf = pushByte(0x01, pBuf);
}
void SecureApplicationLayer::sixBytesFromUInt64(uint64_t num, uint8_t* toByteArray)
{
toByteArray[0] = ((num >> 40) & 0xff);
toByteArray[1] = ((num >> 32) & 0xff);
toByteArray[2] = ((num >> 24) & 0xff);
toByteArray[3] = ((num >> 16) & 0xff);
toByteArray[4] = ((num >> 8) & 0xff);
toByteArray[5] = (num & 0xff);
}
uint64_t SecureApplicationLayer::sixBytesToUInt64(uint8_t* data)
{
uint64_t l = 0;
for (uint8_t i = 0; i < 6; i++)
{
l = (l << 8) + data[i];
}
return l;
}
const uint8_t* SecureApplicationLayer::toolKey(uint16_t devAddr)
{
//TODO: multiple tool keys possible
const uint8_t* toolKey = _secIfObj.propertyData(PID_TOOL_KEY);
return toolKey;
}
const uint8_t* SecureApplicationLayer::p2pKey(uint16_t addressIndex)
{
if (!_secIfObj.isLoaded())
return nullptr;
// TODO
return _secIfObj.propertyData(PID_P2P_KEY_TABLE);
}
const uint8_t* SecureApplicationLayer::groupKey(uint16_t addressIndex)
{
if (!_secIfObj.isLoaded())
return nullptr;
// TODO
return _secIfObj.propertyData(PID_GRP_KEY_TABLE);
}
uint16_t SecureApplicationLayer::groupAddressIndex(uint16_t groupAddr)
{
// TODO
return 0;
}
uint16_t SecureApplicationLayer::indAddressIndex(uint16_t indAddr)
{
// TODO
return 0;
return _addrTab.getTsap(groupAddr);
}
const uint8_t* SecureApplicationLayer::securityKey(uint16_t addr, bool isGroupAddress)
@ -565,13 +507,13 @@ const uint8_t* SecureApplicationLayer::securityKey(uint16_t addr, bool isGroupAd
{
uint16_t gaIndex = groupAddressIndex(addr);
if (gaIndex > 0)
return groupKey(gaIndex);
return _secIfObj.groupKey(gaIndex);
}
else
{
uint16_t iaIndex = indAddressIndex(addr);
uint16_t iaIndex = _secIfObj.indAddressIndex(addr);
if (iaIndex > 0)
return p2pKey(iaIndex);
return _secIfObj.p2pKey(iaIndex);
}
return nullptr;
@ -580,7 +522,7 @@ const uint8_t* SecureApplicationLayer::securityKey(uint16_t addr, bool isGroupAd
// returns next outgoing sequence number for secure communication
uint64_t SecureApplicationLayer::nextSequenceNumber(bool toolAccess)
{
return toolAccess ? sequenceNumberToolAccess : sequenceNumber;
return toolAccess ? _sequenceNumberToolAccess : _sequenceNumber;
}
// stores next outgoing sequence number for secure communication
@ -588,40 +530,29 @@ void SecureApplicationLayer::updateSequenceNumber(bool toolAccess, uint64_t seqN
{
if (toolAccess)
{
sequenceNumberToolAccess = seqNum;
//TODO: securityInterface.set(Pid.ToolSequenceNumberSending, sixBytes(seqNo).array());
_sequenceNumberToolAccess = seqNum;
}
else
{
sequenceNumber = seqNum;
//TODO: securityInterface.set(Pid.SequenceNumberSending, sixBytes(seqNo).array());
_sequenceNumber = seqNum;
}
// Also update the properties accordingly
_secIfObj.setSequenceNumber(toolAccess, seqNum);
}
uint64_t SecureApplicationLayer::lastValidSequenceNumber(bool toolAcces, uint16_t srcAddr)
uint64_t SecureApplicationLayer::lastValidSequenceNumber(bool toolAccess, uint16_t srcAddr)
{
if (toolAcces)
if (toolAccess)
{
// TODO: add map to handle multiplpe lastValidSequenceNumberTool for each srcAddr
// lastValidSequence.getOrDefault(remote, 0L);
// TODO: check if we really have to support multiple tools at the same time
if (srcAddr == _deviceObj.induvidualAddress())
return sequenceNumberToolAccess;
return lastValidSequenceNumberTool;
return _sequenceNumberToolAccess;
return _lastValidSequenceNumberTool;
}
else
{
/*
* TODO:
byte[] addresses = securityInterface.get(Pid.SecurityIndividualAddressTable);
var addr = remote.toByteArray();
// precondition: array size is multiple of entrySize
int entrySize = 2 + 6; // Address and SeqNum
for (int offset = 0; offset < addresses.length; offset += entrySize)
{
if (Arrays.equals(addr, 0, addr.length, addresses, offset, offset + 2))
return unsigned(Arrays.copyOfRange(addresses, offset + 2, offset + 2 + 6));
}
*/
return _secIfObj.getLastValidSequenceNumber(srcAddr);
}
return 0;
@ -630,27 +561,11 @@ uint64_t SecureApplicationLayer::lastValidSequenceNumber(bool toolAcces, uint16_
void SecureApplicationLayer::updateLastValidSequence(bool toolAccess, uint16_t remoteAddr, uint64_t seqNo)
{
if (toolAccess)
// TODO: add map to handle multiple lastValidSequenceNumberTool for each srcAddr
//lastValidSequenceToolAccess.put(remoteAddr, seqNo);
lastValidSequenceNumberTool = seqNo;
// TODO: check if we really have to support multiple tools at the same time
_lastValidSequenceNumberTool = seqNo;
else
{
/*
* TODO:
byte[] addresses = securityInterface.get(Pid.SecurityIndividualAddressTable);
var addr = remote.toByteArray();
int entrySize = addr.length + 6; // Address + SeqNum
// precondition: array size is multiple of entrySize
for (int offset = 0; offset < addresses.length; offset += entrySize) {
if (Arrays.equals(addr, 0, addr.length, addresses, offset, offset + 2)) {
final var start = 1 + offset / entrySize;
final var data = ByteBuffer.allocate(8).put(addr).put(sixBytes(seqNo));
securityInterface.set(Pid.SecurityIndividualAddressTable, start, 1, data.array());
break;
}
}
*/
_secIfObj.setLastValidSequenceNumber(remoteAddr, seqNo);
}
}
@ -684,7 +599,7 @@ void SecureApplicationLayer::sendSyncRequest(uint16_t dstAddr, bool dstAddrIsGro
print("sendSyncRequest: TPCI: ");
println(tpci, HEX);
if(secure(request.data() + APDU_LPDU_DIFF, SecureSyncRequest, _deviceObj.induvidualAddress(), dstAddr, dstAddrIsGroupAddr, tpci, asdu, sizeof(asdu), secCtrl))
if(secure(request.data() + APDU_LPDU_DIFF, kSecureSyncRequest, _deviceObj.induvidualAddress(), dstAddr, dstAddrIsGroupAddr, tpci, asdu, sizeof(asdu), secCtrl))
{
println("SyncRequest: ");
request.apdu().printPDU();
@ -744,7 +659,7 @@ void SecureApplicationLayer::sendSyncResponse(uint16_t dstAddr, bool dstAddrIsGr
print("sendSyncResponse: TPCI: ");
println(tpci, HEX);
if(secure(response.data() + APDU_LPDU_DIFF, SecureSyncResponse, _deviceObj.induvidualAddress(), dstAddr, dstAddrIsGroupAddr, tpci, asdu, sizeof(asdu), secCtrl))
if(secure(response.data() + APDU_LPDU_DIFF, kSecureSyncResponse, _deviceObj.induvidualAddress(), dstAddr, dstAddrIsGroupAddr, tpci, asdu, sizeof(asdu), secCtrl))
{
_lastSyncRes = millis();
@ -857,11 +772,11 @@ bool SecureApplicationLayer::decrypt(uint8_t* plainApdu, uint16_t plainApduLengt
secCtrl.toolAccess = toolAccess;
secCtrl.dataSecurity = authOnly ? DataSecurity::auth : DataSecurity::authConf;
bool syncReq = service == SecureSyncRequest;
bool syncRes = service == SecureSyncResponse;
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 ? 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);
if (key == nullptr)
{
print("Error: No key found. toolAccess: ");
@ -879,7 +794,7 @@ bool SecureApplicationLayer::decrypt(uint8_t* plainApdu, uint16_t plainApduLengt
uint16_t remainingPlainApduLength = plainApduLength;
if (service == SecureDataPdu)
if (service == kSecureDataPdu)
{
if (srcAddr != _deviceObj.induvidualAddress())
{
@ -1125,7 +1040,7 @@ bool SecureApplicationLayer::secure(uint8_t* buffer, uint16_t service, uint16_t
}
}
const uint8_t* key = toolAccess ? toolKey(_syncReqBroadcastIncoming ? _deviceObj.induvidualAddress() : dstAddr) : securityKey(dstAddr, dstAddrIsGroupAddr);
const uint8_t* key = toolAccess ? _secIfObj.toolKey(_syncReqBroadcastIncoming ? _deviceObj.induvidualAddress() : dstAddr) : securityKey(dstAddr, dstAddrIsGroupAddr);
if (key == nullptr)
{
print("Error: No key found. toolAccess: ");
@ -1133,8 +1048,8 @@ bool SecureApplicationLayer::secure(uint8_t* buffer, uint16_t service, uint16_t
return false;
}
bool syncReq = service == SecureSyncRequest;
bool syncRes = service == SecureSyncResponse;
bool syncReq = service == kSecureSyncRequest;
bool syncRes = service == kSecureSyncResponse;
tpci |= SecureService >> 8; // OR'ing upper two APCI bits
uint8_t apci = SecureService & 0x00FF;
@ -1290,7 +1205,7 @@ bool SecureApplicationLayer::createSecureApdu(APDU& plainApdu, APDU& secureApdu,
// FIXME: when cEMI class is refactored, there might be additional info fields in cEMI (fixed APDU_LPDU_DIFF)
// We are starting from TPCI octet (including): plainApdu.frame().data()+APDU_LPDU_DIFF
if(secure(secureApdu.frame().data()+APDU_LPDU_DIFF, SecureDataPdu, srcAddress, dstAddress, isDstAddrGroupAddr, tpci, plainApdu.frame().data()+APDU_LPDU_DIFF, plainApdu.length()+1, secCtrl))
if(secure(secureApdu.frame().data()+APDU_LPDU_DIFF, kSecureDataPdu, srcAddress, dstAddress, isDstAddrGroupAddr, tpci, plainApdu.frame().data()+APDU_LPDU_DIFF, plainApdu.length()+1, secCtrl))
{
print("Update our next ");
print(secCtrl.toolAccess ? "tool access" : "");
@ -1353,7 +1268,7 @@ bool SecureApplicationLayer::isSyncService(APDU& secureApdu)
uint8_t scf = *(secureApdu.data()+1);
uint8_t service = (scf & 0x07); // only 0x0 (S-A_Data-PDU), 0x2 (S-A_Sync_Req-PDU) or 0x3 (S-A_Sync_Rsp-PDU) are valid values
if ((service == SecureSyncRequest) || (service == SecureSyncResponse))
if ((service == kSecureSyncRequest) || (service == kSecureSyncResponse))
{
return true;
}

17
src/knx/secure_application_layer.h
View File

@ -9,6 +9,7 @@
class DeviceObject;
class SecurityInterfaceObject;
class AssociationTableObject;
class AddressTableObject;
class BusAccessUnit;
/**
* This is an implementation of the application layer as specified in @cite knx:3/5/1.
@ -26,7 +27,7 @@ class SecureApplicationLayer : public ApplicationLayer
* @param assocTable The AssociationTable is used to translate between asap (i.e. group objects) and group addresses.
* @param bau methods are called here depending of the content of the APDU
*/
SecureApplicationLayer(DeviceObject& deviceObj, SecurityInterfaceObject& secIfObj, AssociationTableObject& assocTable, BusAccessUnit& bau);
SecureApplicationLayer(DeviceObject& deviceObj, SecurityInterfaceObject& secIfObj, AssociationTableObject& assocTable, AddressTableObject& addrTab, BusAccessUnit& bau);
void setSecurityMode(bool enabled);
bool isSecurityModeEnabled();
@ -225,17 +226,10 @@ class SecureApplicationLayer : public ApplicationLayer
void block0(uint8_t* buffer, uint8_t* seqNum, uint16_t indSrcAddr, uint16_t dstAddr, bool dstAddrIsGroupAddr, uint8_t extFrameFormat, uint8_t tpci, uint8_t apci, uint8_t payloadLength);
void blockCtr0(uint8_t* buffer, uint8_t* seqNum, uint16_t indSrcAddr, uint16_t dstAddr);
void sixBytesFromUInt64(uint64_t num, uint8_t* toByteArray);
uint64_t sixBytesToUInt64(uint8_t* data);
const uint8_t *toolKey(uint16_t devAddr);
const uint8_t* securityKey(uint16_t addr, bool isGroupAddress);
uint16_t indAddressIndex(uint16_t indAddr); // returns 1-based index of address in security IA table
uint16_t groupAddressIndex(uint16_t groupAddr); // returns 1-based index of address in group address table
uint16_t groupObjectIndex(uint16_t groupAddrIndex); // returns 1-based index of object in association table
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
uint8_t groupObjectSecurity(uint16_t groupObjectIndex);
@ -272,6 +266,13 @@ class SecureApplicationLayer : public ApplicationLayer
Map<Addr, uint64_t, 1> _pendingOutgoingSyncRequests; // Store challenges for outgoing sync requests
Map<Addr, uint64_t, 1> _pendingIncomingSyncRequests; // Store challenges for incoming sync requests
uint64_t _sequenceNumberToolAccess = 50;
uint64_t _sequenceNumber = 0;
uint64_t _lastValidSequenceNumberTool = 0;
uint64_t _lastValidSequenceNumber = 0;
SecurityInterfaceObject& _secIfObj;
DeviceObject& _deviceObj;
AddressTableObject& _addrTab;
};

177
src/knx/security_interface_object.cpp
View File

@ -314,5 +314,182 @@ void SecurityInterfaceObject::factoryReset()
property(PID_TOOL_KEY)->write(1, 1, _fdsk);
}
const uint8_t* SecurityInterfaceObject::toolKey(uint16_t devAddr)
{
//TODO: check if multiple tool keys possible, leave it for now
const uint8_t* toolKey = propertyData(PID_TOOL_KEY);
return toolKey;
}
const uint8_t* SecurityInterfaceObject::p2pKey(uint16_t addressIndex)
{
if (!isLoaded())
return nullptr;
// Get number of entries for this property
uint16_t numElements = getNumberOfElements(PID_P2P_KEY_TABLE);
if (numElements > 0)
{
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
for (int i = 1; i <= numElements; i++)
{
property(PID_P2P_KEY_TABLE)->read(i, 1, entry);
uint16_t index = (entry[0] << 8) | entry[1];
if (index > addressIndex)
{
return nullptr;
}
if (index == addressIndex)
{
return propertyData(PID_P2P_KEY_TABLE, i) + sizeof(index);
}
}
}
return nullptr;
}
const uint8_t* SecurityInterfaceObject::groupKey(uint16_t addressIndex)
{
if (!isLoaded())
return nullptr;
// Get number of entries for this property
uint16_t numElements = getNumberOfElements(PID_GRP_KEY_TABLE);
if (numElements > 0)
{
uint8_t elementSize = propertySize(PID_GRP_KEY_TABLE);
// Search for address index
uint8_t entry[elementSize]; // 2 bytes index + keysize (16 bytes) = 18 bytes
for (int i = 1; i <= numElements; i++)
{
property(PID_P2P_KEY_TABLE)->read(i, 1, entry);
uint16_t index = (entry[0] << 8) | entry[1];
if (index > addressIndex)
{
return nullptr;
}
if (index == addressIndex)
{
return propertyData(PID_GRP_KEY_TABLE, i) + sizeof(index);
}
}
}
return nullptr;
}
uint16_t SecurityInterfaceObject::indAddressIndex(uint16_t indAddr)
{
// Get number of entries for this property
uint16_t numElements = getNumberOfElements(PID_SECURITY_INDIVIDUAL_ADDRESS_TABLE);
if (numElements > 0)
{
uint8_t elementSize = propertySize(PID_SECURITY_INDIVIDUAL_ADDRESS_TABLE);
// Search for individual address
uint8_t entry[elementSize]; // 2 bytes address + 6 bytes seqno = 8 bytes
for (int i = 1; i <= numElements; i++)
{
property(PID_SECURITY_INDIVIDUAL_ADDRESS_TABLE)->read(i, 1, entry);
uint16_t addr = (entry[0] << 8) | entry[1];
if (addr == indAddr)
{
return i;
}
}
}
// Not found
return 0;
}
void SecurityInterfaceObject::setSequenceNumber(bool toolAccess, uint64_t seqNum)
{
uint8_t seqBytes[6] = {0x00};
sixBytesFromUInt64(seqNum, seqBytes);
if (toolAccess)
{
property(PID_TOOL_SEQUENCE_NUMBER_SENDING)->write(1, 1, seqBytes);
}
else
{
property(PID_SEQUENCE_NUMBER_SENDING)->write(1, 1, seqBytes);
}
}
uint16_t SecurityInterfaceObject::getNumberOfElements(PropertyID propId)
{
// Get number of entries for this property
uint16_t numElements = 0;
uint8_t data[sizeof(uint16_t)]; // is sizeof(_currentElements) which is uint16_t
uint8_t count = property(propId)->read(0, 1, data);
if (count > 0)
{
popWord(numElements, data);
}
return numElements;
}
uint64_t SecurityInterfaceObject::getLastValidSequenceNumber(uint16_t deviceAddr)
{
// Get number of entries for this property
uint16_t numElements = getNumberOfElements(PID_SECURITY_INDIVIDUAL_ADDRESS_TABLE);
if (numElements > 0)
{
uint8_t elementSize = propertySize(PID_SECURITY_INDIVIDUAL_ADDRESS_TABLE);
// Search for individual address
uint8_t entry[elementSize]; // 2 bytes address + 6 bytes seqno = 8 bytes
for (int i = 1; i <= numElements; i++)
{
property(PID_SECURITY_INDIVIDUAL_ADDRESS_TABLE)->read(i, 1, entry);
uint16_t addr = (entry[0] << 8) | entry[1];
if (addr == deviceAddr)
{
return sixBytesToUInt64(&entry[2]);
}
}
}
return 0;
}
void SecurityInterfaceObject::setLastValidSequenceNumber(uint16_t deviceAddr, uint64_t seqNum)
{
// Get number of entries for this property
uint16_t numElements = getNumberOfElements(PID_SECURITY_INDIVIDUAL_ADDRESS_TABLE);
if (numElements > 0)
{
uint8_t elementSize = propertySize(PID_SECURITY_INDIVIDUAL_ADDRESS_TABLE);
// Search for individual address
uint8_t entry[elementSize]; // 2 bytes address + 6 bytes seqno = 8 bytes
for (int i = 1; i <= numElements; i++)
{
property(PID_SECURITY_INDIVIDUAL_ADDRESS_TABLE)->read(i, 1, entry);
uint16_t addr = (entry[0] << 8) | entry[1];
if (addr == deviceAddr)
{
sixBytesFromUInt64(seqNum, &entry[2]);
property(PID_SECURITY_INDIVIDUAL_ADDRESS_TABLE)->write(i, 1, entry);
}
}
}
}
#endif

12
src/knx/security_interface_object.h
View File

@ -22,6 +22,16 @@ public:
bool isLoaded();
const uint8_t* toolKey(uint16_t devAddr); // 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
uint16_t indAddressIndex(uint16_t indAddr); // returns 1-based index of address in security IA table
void setSequenceNumber(bool toolAccess, uint64_t seqNum);
uint64_t getLastValidSequenceNumber(uint16_t deviceAddr);
void setLastValidSequenceNumber(uint16_t deviceAddr, uint64_t seqNum);
private:
SecureApplicationLayer* _secAppLayer = nullptr;
@ -36,6 +46,8 @@ private:
void loadState(LoadState newState);
LoadState _state = LS_UNLOADED;
uint16_t getNumberOfElements(PropertyID propId);
// Our FDSK
static const uint8_t _fdsk[];
static uint8_t _secReport[];