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packet-matter-common.cpp
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packet-matter-common.cpp
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/*
* Copyright (c) 2023 Project CHIP Authors.
*
* Use of this source code is governed by a BSD-style
* license that can be found in the LICENSE file or at
* https://opensource.org/license/bsd-3-clause
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <glib.h>
#include "config.h"
#include <epan/packet.h>
#include <Matter/Core/MatterCore.h>
#include <Matter/Protocols/MatterProfiles.h>
#include <Matter/Protocols/common/CommonProfile.h>
#include <Matter/Protocols/security/MatterCASE.h>
#include <Matter/Support/MatterNames.h>
#include <Matter/Support/CodeUtils.h>
#include <Matter/Support/ErrorStr.h>
#include "packet-matter.h"
#include "TLVDissector.h"
#include "MatterMessageTracker.h"
using namespace matter;
using namespace matter::TLV;
using namespace matter::Profiles;
using namespace matter::Profiles::Common;
using namespace matter::Profiles::Security;
extern void AssociateWithIMSubscription(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, MatterMessageRecord *msgRec);
static int proto_MatterCommon = -1;
static int ett_MatterCommon = -1;
static int hf_StatusReport_ProfileId = -1;
static int hf_StatusReport_StatusCode = -1;
static int hf_StatusReport_TLV = -1;
static int hf_StatusReport_IsError = -1;
//static int ett_PBKDFParamRequest = -1;
//static int hf_PBKDFParamRequest = -1;
static int hf_PBKDFParamRequest_initiatorRandom = -1;
static int hf_PBKDFParamRequest_localSessionId = -1;
static int hf_PBKDFParamRequest_passcodeId = -1;
static int hf_PBKDFParamRequest_hasPbkdfParams = -1;
static int hf_PBKDFParamResponse_responderRandom = -1;
static int hf_PBKDFParamResponse_pbkdfIterationCount = -1;
static int hf_PBKDFParamResponse_pbkdfSaltLength = -1;
static int hf_PBKDFParamResponse_pbkdfSalt = -1;
static int hf_Pake1_pA = -1;
static int hf_Pake2_pB = -1;
static int hf_Pake2_cB = -1;
static int hf_Pake3_cA = -1;
static int hf_Session_destinationId = -1;
static int hf_Session_ephPublicKey = -1;
static int hf_Session_encrypted = -1;
static int
DissectStatusReport(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
MATTER_ERROR err = MATTER_NO_ERROR;
proto_item *isErrorItem;
uint16_t generalCode;
uint32_t profileId;
uint16_t statusCode;
const char *profileName = NULL;
const char *statusReportStr = NULL;
int parsePoint = 0;
bool isError;
proto_item_append_text(proto_tree_get_parent(tree), ": Status Report");
// General code
generalCode = tvb_get_letohs(tvb, parsePoint);
statusReportStr = matter::StatusReportStr(kMatterProfile_General, generalCode);
proto_tree_add_uint_format_value(tree, hf_StatusReport_StatusCode, tvb, parsePoint, 2, generalCode, "%s", statusReportStr);
parsePoint += 2;
profileId = tvb_get_letohl(tvb, parsePoint);
profileName = GetProtocolName(profileId);
proto_tree_add_uint_format_value(tree, hf_StatusReport_ProfileId, tvb, parsePoint, 4, profileId,
(profileName != NULL) ? "%08X (%s)" : "%08X", profileId, profileName);
parsePoint += 4;
statusCode = tvb_get_letohs(tvb, parsePoint);
statusReportStr = matter::StatusReportStr(profileId, statusCode);
proto_tree_add_uint_format_value(tree, hf_StatusReport_StatusCode, tvb, parsePoint, 2, statusCode, "%s", statusReportStr);
parsePoint += 2;
isError = (statusCode != General::kStatus_SUCCESS);
col_prepend_fstr(pinfo->cinfo, COL_INFO, "StatusReport (%s) ", (isError) ? "ERROR" : "SUCCESS");
if (parsePoint < msgInfo.payloadLen) {
const uint8_t *msgData = (const uint8_t *)tvb_memdup(pinfo->pool, tvb, parsePoint, msgInfo.payloadLen - parsePoint);
TLVDissector tlvDissector;
tlvDissector.Init(msgData, msgInfo.payloadLen - parsePoint, parsePoint);
err = tlvDissector.Next();
SuccessOrExit(err);
err = tlvDissector.AddGenericTLVItem(tree, hf_StatusReport_TLV, tvb, false);
SuccessOrExit(err);
}
isErrorItem = proto_tree_add_boolean(tree, hf_StatusReport_IsError, tvb, 0, 0, isError);
PROTO_ITEM_SET_HIDDEN(isErrorItem);
AssociateWithIMSubscription(tvb, pinfo, tree, msgInfo.msgRec);
exit:
return msgInfo.payloadLen;
}
static int
DissectStandaloneAck(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
proto_item_append_text(proto_tree_get_parent(tree), ": StandaloneAck");
if ((msgInfo.exchHeader & kMatterExchangeFlag_AckId) != 0) {
col_prepend_fstr(pinfo->cinfo, COL_INFO, "StandAloneACK ");
}
else {
col_prepend_fstr(pinfo->cinfo, COL_INFO, "Null ");
}
AssociateWithIMSubscription(tvb, pinfo, tree, msgInfo.msgRec);
return 1;
}
/**
* Dissect PASE PBKDF Request message.
pbkdfparamreq-struct => STRUCTURE [ tag-order ]
{
initiatorRandom [1] : OCTET STRING [ length 32 ],
initiatorSessionId [2] : UNSIGNED INTEGER [ range 16-bits ],
passcodeId [3] : UNSIGNED INTEGER [ length 16-bits ],
hasPBKDFParameters [4] : BOOLEAN,
initiatorMRPParams [5, optional] : mrp-parameter-struct
}
mrp-parameter-struct => STRUCTURE [ tag-order ]
{
MRP_RETRY_INTERVAL_IDLE [1, optional] : UNSIGNED INTEGER [ range 16-bits ],
MRP_RETRY_INTERVAL_ACTIVE [2, optional] : UNSIGNED INTEGER [ range 16-bits ]
}
*/
static int
DissectPBKDFParamRequest(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
MATTER_ERROR err = MATTER_NO_ERROR;
int parsePoint = 0;
const uint8_t *msgData = (const uint8_t *)tvb_memdup(pinfo->pool, tvb, parsePoint, msgInfo.payloadLen - parsePoint);
TLVDissector tlvDissector;
//proto_tree *subTree;
proto_item_append_text(proto_tree_get_parent(tree), ": PASE PBKDF Param Request");
tlvDissector.Init(msgData, msgInfo.payloadLen - parsePoint, parsePoint);
tlvDissector.ImplicitProfileId = kMatterProfile_Common;
err = tlvDissector.Next();
SuccessOrExit(err);
//err = tlvDissector.AddSubTreeItem(tree, hf_PBKDFParamRequest, ett_PBKDFParamRequest, tvb, subTree);
//SuccessOrExit(err);
err = tlvDissector.EnterContainer();
SuccessOrExit(err);
while (true) {
err = tlvDissector.Next();
if (err == MATTER_END_OF_TLV)
break;
SuccessOrExit(err);
uint64_t tag = tlvDissector.GetTag();
TLVType type = tlvDissector.GetType();
VerifyOrExit(IsContextTag(tag), err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
switch (TagNumFromTag(tag)) {
case 1:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamRequest_initiatorRandom, tvb);
SuccessOrExit(err);
break;
case 2:
VerifyOrExit(type == kTLVType_UnsignedInteger, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamRequest_localSessionId, tvb);
SuccessOrExit(err);
break;
case 3:
VerifyOrExit(type == kTLVType_UnsignedInteger, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamRequest_passcodeId, tvb);
SuccessOrExit(err);
break;
case 4:
VerifyOrExit(type == kTLVType_Boolean, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamRequest_hasPbkdfParams, tvb);
SuccessOrExit(err);
break;
case 5:
// TODO: add support for mrp-parameter-struct
break;
default:
ExitNow(err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
}
}
err = tlvDissector.ExitContainer();
SuccessOrExit(err);
exit:
return err;
}
/**
* Dissect PASE PBKDF Parameter Response message.
pbkdfparamresp-struct => STRUCTURE [ tag-order ]
{
initiatorRandom [1] : OCTET STRING [ length 32 ],
responderRandom [2] : OCTET STRING [ length 32 ],
responderSessionId [3] : UNSIGNED INTEGER [ range 16-bits ],
pbkdf_parameters [4] : Crypto_PBKDFParameterSet,
responderMRPParams [5, optional] : mrp-parameter-struct
}
Crypto_PBKDFParameterSet => STRUCTURE [ tag-order ]
{
iterations [1] : UNSIGNED INTEGER [ range 32-bits ],
salt [2] : OCTET STRING [ length 16..32 ],
}
mrp-parameter-struct => STRUCTURE [ tag-order ]
{
MRP_RETRY_INTERVAL_IDLE [1, optional] : UNSIGNED INTEGER [ range 16-bits ],
MRP_RETRY_INTERVAL_ACTIVE [2, optional] : UNSIGNED INTEGER [ range 16-bits ]
}
*/
static int
DissectPBKDFParamResponse(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
MATTER_ERROR err = MATTER_NO_ERROR;
int parsePoint = 0;
const uint8_t *msgData = (const uint8_t *)tvb_memdup(pinfo->pool, tvb, parsePoint, msgInfo.payloadLen - parsePoint);
TLVDissector tlvDissector;
proto_item_append_text(proto_tree_get_parent(tree), ": PASE PBKDF Param Response");
tlvDissector.Init(msgData, msgInfo.payloadLen - parsePoint, parsePoint);
tlvDissector.ImplicitProfileId = kMatterProfile_Common;
err = tlvDissector.Next();
SuccessOrExit(err);
err = tlvDissector.EnterContainer();
SuccessOrExit(err);
while (true) {
err = tlvDissector.Next();
if (err == MATTER_END_OF_TLV)
break;
SuccessOrExit(err);
uint64_t tag = tlvDissector.GetTag();
TLVType type = tlvDissector.GetType();
VerifyOrExit(IsContextTag(tag), err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
switch (TagNumFromTag(tag)) {
case 1:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamRequest_initiatorRandom, tvb);
SuccessOrExit(err);
break;
case 2:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamResponse_responderRandom, tvb);
SuccessOrExit(err);
break;
case 3:
VerifyOrExit(type == kTLVType_UnsignedInteger, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamRequest_localSessionId, tvb);
SuccessOrExit(err);
break;
case 4:
// TODO: add support for Crypto_PBKDFParameterSet
break;
case 5:
// TODO: add support for mrp-parameter-struct
break;
default:
ExitNow(err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
}
}
err = tlvDissector.ExitContainer();
SuccessOrExit(err);
exit:
return err;
}
/**
* Dissect PASE Pake1 Message.
pake-1-struct => STRUCTURE [ tag-order ]
{
pA [1] : OCTET STRING [ length CRYPTO_PUBLIC_KEY_SIZE_BYTES ],
}
*/
static int
DissectPasePake1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
MATTER_ERROR err = MATTER_NO_ERROR;
int parsePoint = 0;
const uint8_t *msgData = (const uint8_t *)tvb_memdup(pinfo->pool, tvb, parsePoint, msgInfo.payloadLen - parsePoint);
TLVDissector tlvDissector;
proto_item_append_text(proto_tree_get_parent(tree), ": PASE Pake1");
tlvDissector.Init(msgData, msgInfo.payloadLen - parsePoint, parsePoint);
tlvDissector.ImplicitProfileId = kMatterProfile_Common;
err = tlvDissector.Next();
SuccessOrExit(err);
err = tlvDissector.EnterContainer();
SuccessOrExit(err);
while (true) {
err = tlvDissector.Next();
if (err == MATTER_END_OF_TLV)
break;
SuccessOrExit(err);
uint64_t tag = tlvDissector.GetTag();
TLVType type = tlvDissector.GetType();
VerifyOrExit(IsContextTag(tag), err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
switch (TagNumFromTag(tag)) {
case 1:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_Pake1_pA, tvb);
SuccessOrExit(err);
break;
default:
ExitNow(err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
}
}
err = tlvDissector.ExitContainer();
SuccessOrExit(err);
exit:
return err;
}
/**
* Dissect PASE Pake2 message.
pake-2-struct => STRUCTURE [ tag-order ]
{
pB [1] : OCTET STRING [ length CRYPTO_PUBLIC_KEY_SIZE_BYTES ],
cB [2] : OCTET STRING [ length CRYPTO_HASH_LEN_BYTES],
}
*/
static int
DissectPasePake2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
MATTER_ERROR err = MATTER_NO_ERROR;
int parsePoint = 0;
const uint8_t *msgData = (const uint8_t *)tvb_memdup(pinfo->pool, tvb, parsePoint, msgInfo.payloadLen - parsePoint);
TLVDissector tlvDissector;
proto_item_append_text(proto_tree_get_parent(tree), ": PASE Pake2");
tlvDissector.Init(msgData, msgInfo.payloadLen - parsePoint, parsePoint);
tlvDissector.ImplicitProfileId = kMatterProfile_Common;
err = tlvDissector.Next();
SuccessOrExit(err);
err = tlvDissector.EnterContainer();
SuccessOrExit(err);
while (true) {
err = tlvDissector.Next();
if (err == MATTER_END_OF_TLV)
break;
SuccessOrExit(err);
uint64_t tag = tlvDissector.GetTag();
TLVType type = tlvDissector.GetType();
VerifyOrExit(IsContextTag(tag), err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
switch (TagNumFromTag(tag)) {
case 1:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_Pake2_pB, tvb);
SuccessOrExit(err);
break;
case 2:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_Pake2_cB, tvb);
SuccessOrExit(err);
break;
default:
ExitNow(err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
}
}
err = tlvDissector.ExitContainer();
SuccessOrExit(err);
exit:
return err;
}
/**
* Dissect PASE Pake3 message.
pake-3-struct => STRUCTURE [ tag-order ]
{
cA [1] : OCTET STRING [length CRYPTO_HASH_LEN_BYTES],
}
*/
static int
DissectPasePake3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
MATTER_ERROR err = MATTER_NO_ERROR;
int parsePoint = 0;
const uint8_t *msgData = (const uint8_t *)tvb_memdup(pinfo->pool, tvb, parsePoint, msgInfo.payloadLen - parsePoint);
TLVDissector tlvDissector;
proto_item_append_text(proto_tree_get_parent(tree), ": PASE Pake3");
tlvDissector.Init(msgData, msgInfo.payloadLen - parsePoint, parsePoint);
tlvDissector.ImplicitProfileId = kMatterProfile_Common;
err = tlvDissector.Next();
SuccessOrExit(err);
err = tlvDissector.EnterContainer();
SuccessOrExit(err);
while (true) {
err = tlvDissector.Next();
if (err == MATTER_END_OF_TLV)
break;
SuccessOrExit(err);
uint64_t tag = tlvDissector.GetTag();
TLVType type = tlvDissector.GetType();
VerifyOrExit(IsContextTag(tag), err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
switch (TagNumFromTag(tag)) {
case 1:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_Pake3_cA, tvb);
SuccessOrExit(err);
break;
default:
ExitNow(err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
}
}
err = tlvDissector.ExitContainer();
SuccessOrExit(err);
exit:
return err;
}
/**
sigma-error-enum => UNSIGNED INTEGER [ range 8bits ] {
NoSharedTrustRoots = 0x01,
InvalidParameter = 0x02,
}
*/
static int
DissectPasePakeError(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
col_prepend_fstr(pinfo->cinfo, COL_INFO, "PASE Spake2 Err ");
proto_item_append_text(proto_tree_get_parent(tree), ": PASE Spake2 Error");
return 1;
}
/**
* Dissect CASE Sigma1 message.
sigma-1-struct => STRUCTURE [ tag-order ]
{
initiatorRandom [1] : OCTET STRING [ length 32 ],
initiatorSessionId [2] : UNSIGNED INTEGER [ range 16-bits ],
destinationId [3] : destination-identifier,
initiatorEphPubKey [4] : ec-pub-key,
initiatorMRPParams [5, optional] : mrp-parameter-struct,
resumptionID [6, optional] : OCTET STRING [ length 16 ],
initiatorResumeMIC [7, optional] : OCTET STRING [ length CRYPTO_AEAD_MIC_LENGTH_BYTES ]
}
*/
static int
DissectCaseSigma1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
MATTER_ERROR err = MATTER_NO_ERROR;
int parsePoint = 0;
const uint8_t *msgData = (const uint8_t *)tvb_memdup(pinfo->pool, tvb, parsePoint, msgInfo.payloadLen - parsePoint);
TLVDissector tlvDissector;
proto_item_append_text(proto_tree_get_parent(tree), ": CASE Sigma1");
tlvDissector.Init(msgData, msgInfo.payloadLen - parsePoint, parsePoint);
tlvDissector.ImplicitProfileId = kMatterProfile_Common;
err = tlvDissector.Next();
SuccessOrExit(err);
err = tlvDissector.EnterContainer();
SuccessOrExit(err);
while (true) {
err = tlvDissector.Next();
if (err == MATTER_END_OF_TLV)
break;
SuccessOrExit(err);
uint64_t tag = tlvDissector.GetTag();
TLVType type = tlvDissector.GetType();
VerifyOrExit(IsContextTag(tag), err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
switch (TagNumFromTag(tag)) {
case CASE::Sigma1::kTag_InitiatorRandom:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamRequest_initiatorRandom, tvb);
SuccessOrExit(err);
break;
case CASE::Sigma1::kTag_InitiatorSessionId:
VerifyOrExit(type == kTLVType_UnsignedInteger, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamRequest_localSessionId, tvb);
SuccessOrExit(err);
break;
case CASE::Sigma1::kTag_DestinationId:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_Session_destinationId, tvb);
SuccessOrExit(err);
break;
case CASE::Sigma1::kTag_InitiatorEphPubKey:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_Session_ephPublicKey, tvb);
SuccessOrExit(err);
break;
case CASE::Sigma1::kTag_InitiatorSleepyParams:
case CASE::Sigma1::kTag_ResumptionId:
case CASE::Sigma1::kTag_InitiatorResumeMic:
// TODO: add support for optional fields
err = tlvDissector.AddGenericTLVItem(tree, hf_StatusReport_TLV, tvb, false);
SuccessOrExit(err);
break;
default:
ExitNow(err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
}
}
err = tlvDissector.ExitContainer();
SuccessOrExit(err);
exit:
return err;
}
/**
* Dissect CASE Sigma2 message.
sigma-2-struct => STRUCTURE [ tag-order ]
{
responderRandom [1] : OCTET STRING [ length 32 ],
responderSessionId [2] : UNSIGNED INTEGER [ range 16-bits ],
responderEphPubKey [3] : ec-pub-key,
encrypted2 [4] : OCTET STRING,
responderMRPParams [5, optional] : mrp-parameter-struct
}
*/
static int
DissectCaseSigma2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
MATTER_ERROR err = MATTER_NO_ERROR;
int parsePoint = 0;
const uint8_t *msgData = (const uint8_t *)tvb_memdup(pinfo->pool, tvb, parsePoint, msgInfo.payloadLen - parsePoint);
TLVDissector tlvDissector;
proto_item_append_text(proto_tree_get_parent(tree), ": CASE Sigma2");
tlvDissector.Init(msgData, msgInfo.payloadLen - parsePoint, parsePoint);
tlvDissector.ImplicitProfileId = kMatterProfile_Common;
err = tlvDissector.Next();
SuccessOrExit(err);
err = tlvDissector.EnterContainer();
SuccessOrExit(err);
while (true) {
err = tlvDissector.Next();
if (err == MATTER_END_OF_TLV)
break;
SuccessOrExit(err);
uint64_t tag = tlvDissector.GetTag();
TLVType type = tlvDissector.GetType();
VerifyOrExit(IsContextTag(tag), err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
switch (TagNumFromTag(tag)) {
case CASE::Sigma2::kTag_ResponderRandom:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamResponse_responderRandom, tvb);
SuccessOrExit(err);
break;
case CASE::Sigma2::kTag_ResponderSessionId:
VerifyOrExit(type == kTLVType_UnsignedInteger, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_PBKDFParamRequest_localSessionId, tvb);
SuccessOrExit(err);
break;
case CASE::Sigma2::kTag_ResponderEphPubKey:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_Session_ephPublicKey, tvb);
SuccessOrExit(err);
break;
case CASE::Sigma2::kTag_Encrypted2:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_Session_encrypted, tvb);
SuccessOrExit(err);
break;
case CASE::Sigma2::kTag_ResponderSleepyParams:
// TODO: add support for optional fields
err = tlvDissector.AddGenericTLVItem(tree, hf_StatusReport_TLV, tvb, false);
SuccessOrExit(err);
break;
default:
ExitNow(err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
}
}
err = tlvDissector.ExitContainer();
SuccessOrExit(err);
exit:
return err;
}
/**
* Dissect CASE Sigma1 message.
sigma-3-struct => STRUCTURE [ tag-order ]
{
encrypted3 [1] : OCTET STRING,
}
*/
static int
DissectCaseSigma3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
MATTER_ERROR err = MATTER_NO_ERROR;
int parsePoint = 0;
const uint8_t *msgData = (const uint8_t *)tvb_memdup(pinfo->pool, tvb, parsePoint, msgInfo.payloadLen - parsePoint);
TLVDissector tlvDissector;
proto_item_append_text(proto_tree_get_parent(tree), ": CASE Sigma3");
tlvDissector.Init(msgData, msgInfo.payloadLen - parsePoint, parsePoint);
tlvDissector.ImplicitProfileId = kMatterProfile_Common;
err = tlvDissector.Next();
SuccessOrExit(err);
err = tlvDissector.EnterContainer();
SuccessOrExit(err);
while (true) {
err = tlvDissector.Next();
if (err == MATTER_END_OF_TLV)
break;
SuccessOrExit(err);
uint64_t tag = tlvDissector.GetTag();
TLVType type = tlvDissector.GetType();
VerifyOrExit(IsContextTag(tag), err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
switch (TagNumFromTag(tag)) {
case CASE::Sigma3::kTag_Encrypted3:
VerifyOrExit(type == kTLVType_ByteString, err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddTypedItem(tree, hf_Session_encrypted, tvb);
SuccessOrExit(err);
break;
default:
ExitNow(err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
}
}
err = tlvDissector.ExitContainer();
SuccessOrExit(err);
exit:
return err;
}
/**
* Dissect CASE Sigma2 resume message.
sigma-2-resume-struct => STRUCTURE [ tag-order ]
{
resumptionID [1] : OCTET STRING [ length 16 ],
sigma2ResumeMIC [2] : OCTET STRING [ length 16 ],
responderSessionID [3] : UNSIGNED INTEGER [ range 16-bits ],
responderMRPParams [4, optional] : <<Glossary_of_params_MRP, mrp-parameter-struct>>
}
*/
static int
DissectCaseSigma2Resume(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, const MatterMessageInfo& msgInfo)
{
MATTER_ERROR err = MATTER_NO_ERROR;
int parsePoint = 0;
const uint8_t *msgData = (const uint8_t *)tvb_memdup(pinfo->pool, tvb, parsePoint, msgInfo.payloadLen - parsePoint);
TLVDissector tlvDissector;
proto_item_append_text(proto_tree_get_parent(tree), ": CASE Sigma2 Resume");
tlvDissector.Init(msgData, msgInfo.payloadLen - parsePoint, parsePoint);
tlvDissector.ImplicitProfileId = kMatterProfile_Common;
err = tlvDissector.Next();
SuccessOrExit(err);
err = tlvDissector.EnterContainer();
SuccessOrExit(err);
while (true) {
err = tlvDissector.Next();
if (err == MATTER_END_OF_TLV)
break;
SuccessOrExit(err);
uint64_t tag = tlvDissector.GetTag();
VerifyOrExit(IsContextTag(tag), err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
err = tlvDissector.AddGenericTLVItem(tree, hf_StatusReport_TLV, tvb, false);
SuccessOrExit(err);
/*
TLVType type = tlvDissector.GetType();
switch (TagNumFromTag(tag)) {
// TODO: add support for parsing specific CASEResume fields
case 1:
case 2:
case 3:
case 4:
break;
default:
ExitNow(err = MATTER_ERROR_UNEXPECTED_TLV_ELEMENT);
}
*/
}
err = tlvDissector.ExitContainer();
SuccessOrExit(err);
exit:
return err;
}
static int
DissectMatterCommon(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_, void *data _U_)
{
const MatterMessageInfo& msgInfo = *(const MatterMessageInfo *)data;
proto_item *top = proto_tree_add_item(tree, proto_MatterCommon, tvb, 0, -1, ENC_NA);
proto_tree *common_tree = proto_item_add_subtree(top, ett_MatterCommon);
switch (msgInfo.msgType) {
case kMsgType_StatusReport:
return DissectStatusReport(tvb, pinfo, common_tree, msgInfo);
case kMsgType_StandaloneAck:
return DissectStandaloneAck(tvb, pinfo, common_tree, msgInfo);
// Dissect PASE Messages
case kMsgType_PBKDFParamRequest:
return DissectPBKDFParamRequest(tvb, pinfo, common_tree, msgInfo);
case kMsgType_PBKDFParamResponse:
return DissectPBKDFParamResponse(tvb, pinfo, common_tree, msgInfo);
case kMsgType_PASE_Spake2p1:
return DissectPasePake1(tvb, pinfo, common_tree, msgInfo);
case kMsgType_PASE_Spake2p2:
return DissectPasePake2(tvb, pinfo, common_tree, msgInfo);
case kMsgType_PASE_Spake2p3:
return DissectPasePake3(tvb, pinfo, common_tree, msgInfo);
case kMsgType_PASE_Spake2pError:
return DissectPasePakeError(tvb, pinfo, common_tree, msgInfo);
// Dissect CASE Messages
case kMsgType_CASE_Sigma1:
return DissectCaseSigma1(tvb, pinfo, common_tree, msgInfo);
case kMsgType_CASE_Sigma2:
return DissectCaseSigma2(tvb, pinfo, common_tree, msgInfo);
case kMsgType_CASE_Sigma3:
return DissectCaseSigma3(tvb, pinfo, common_tree, msgInfo);
case kMsgType_CASE_Sigma2_Resume:
return DissectCaseSigma2Resume(tvb, pinfo, common_tree, msgInfo);
default:
return 0;
}
}
void
proto_register_matter_common(void)
{
static hf_register_info hf[] = {
{ &hf_StatusReport_ProfileId,
{ "Status Profile Id", "matter.status_report.profile_id",
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_StatusReport_StatusCode,
{ "Status Code", "matter.status_report.status_code",
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }
},
{ &hf_StatusReport_TLV,
{ "TLV", "matter.status_report.tlv",
FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_StatusReport_IsError,
{ "Is Error", "matter.status_report.is_error",
FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
/*
{ &hf_PBKDFParamRequest,
{ "PASE PBKDF Param Request", "matter.pase.pbkdf_param_req",
FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
*/
{ &hf_PBKDFParamRequest_initiatorRandom,
{ "Initiator Random", "matter.pase.initiator_random",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_PBKDFParamRequest_localSessionId,
{ "Local Session ID", "matter.pase.local_session_id",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_PBKDFParamRequest_passcodeId,
{ "Passcode ID", "matter.pase.passcode_id",
FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_PBKDFParamRequest_hasPbkdfParams,
{ "Has PBKDF Parameters", "matter.pase.has_pbkdf_params",
FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_PBKDFParamResponse_responderRandom,
{ "Responder Random", "matter.pase.responder_random",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_PBKDFParamResponse_pbkdfIterationCount,
{ "PBKDF Iterations", "matter.pase.pbkdf_interation_count",
FT_UINT64, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_PBKDFParamResponse_pbkdfSaltLength,
{ "PBKDF Salt Length", "matter.pase.pbkdf_salt_length",
FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }
},
{ &hf_PBKDFParamResponse_pbkdfSalt,
{ "PBKDF Salt", "matter.pase.salt",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_Pake1_pA,
{ "pA", "matter.pase.pake1.pA",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_Pake2_pB,
{ "pB", "matter.pase.pake2.pB",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_Pake2_cB,
{ "cB", "matter.pase.pake2.cB",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_Pake3_cA,
{ "cA", "matter.pase.pake3.cA",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_Session_destinationId,
{ "Destination Node ID", "matter.session.destination_id",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_Session_ephPublicKey,
{ "Ephemeral public key", "matter.session.eph_public_key",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
{ &hf_Session_encrypted,
{ "Encrypted", "matter.session.encrypted",
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }
},
};
static gint *ett[] = {
&ett_MatterCommon,
};
proto_MatterCommon = proto_register_protocol(
"Matter Secure Channel Protocol",
"Matter-Common",
"matter-common"
);
proto_register_field_array(proto_MatterCommon, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_matter_common(void)
{
static dissector_handle_t matter_common_handle;
matter_common_handle = create_dissector_handle(DissectMatterCommon, proto_MatterCommon);
dissector_add_uint("matter.profile_id", kMatterProfile_Common, matter_common_handle);
}