Report generation date: 2024-07-27

Project overview: ibmswtpm2

High level conclusions

Fuzzers reach 34.34% of cyclomatic complexity.

Fuzzers reach 35.02% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

394 / 1125

Cyclomatic complexity statically reachable by fuzzers

1936 / 5637

Runtime code coverage of functions

148 / 1125

Fuzzers overview

Fuzzer	Fuzzer filename	Functions Reached	Functions unreached	Fuzzer depth	Files reached	Basic blocks reached	Cyclomatic complexity	Details
fuzz_tpm_server	fuzzer.cc	447	760	16	56	4957	2044	fuzzer.cc

Project functions overview

The following table shows data about each function in the project. The functions included in this table correspond to all functions that exist in the executables of the fuzzers. As such, there may be functions that are from third-party libraries.

For further technical details on the meaning of columns in the below table, please see the Glossary .

Func name	Functions filename	Args	Function call depth	Reached by Fuzzers	Fuzzers runtime hit	Func lines hit %	I Count	BB Count	Cyclomatic complexity	Functions reached	Reached by functions	Accumulated cyclomatic complexity	Undiscovered complexity

Fuzzer details

Fuzzer: fuzz_tpm_server

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color Runtime hitcount Callsite count Percentage

red 0 1058 76.3%

gold [1:9] 21 1.51%

yellow [10:29] 1 0.07%

greenyellow [30:49] 0 0.0%

lawngreen 50+ 306 22.0%

All colors 1386 100

Color	Runtime hitcount	Callsite count	Percentage
red	0	1058	76.3%
gold	[1:9]	21	1.51%
yellow	[10:29]	1	0.07%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	306	22.0%
All colors	1386	100

Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique non-covered Complexity	Unique Reachable Complexities	Unique Reachable Functions	All non-covered Complexity	All Reachable Complexity	Function Name	Function Callsite	Blocked Branch
1684	1686	2 : View List ['CryptKDFa', 'MemoryCopy']	1684	1686	DRBG_Generate	call site: 00141	/src/ibmswtpm2/src/CryptRand.c:671
1055	1055	1 : View List ['BuildResponseSession']	1067	1146	ExecuteCommand	call site: 01274	/src/ibmswtpm2/src/ExecCommand.c:271
1035	1035	1 : View List ['TpmFailureMode']	1035	1035	ExecuteCommand	call site: 00953	/src/ibmswtpm2/src/ExecCommand.c:123
924	924	1 : View List ['CheckCommandAudit']	924	924	CheckAuthNoSession	call site: 01271	/src/ibmswtpm2/src/SessionProcess.c:1553
828	828	1 : View List ['CryptHashBlock']	828	1669	CryptHmacStart	call site: 00095	/src/ibmswtpm2/src/CryptHash.c:573
42	42	1 : View List ['PCRResetDynamics']	42	953	_TPM_Hash_End	call site: 00913	/src/ibmswtpm2/src/IntegrityCommands.c:376
42	42	3 : View List ['DfUpdate', 'DfEnd', 'DfStart']	42	42	DfBuffer	call site: 00758	/src/ibmswtpm2/src/CryptRand.c:203
6	6	1 : View List ['TpmFail']	6	6	TestHash	call site: 00109	/src/ibmswtpm2/src/AlgorithmTests.c:151
6	6	1 : View List ['TpmFail']	6	6	DRBG_Update	call site: 00170	/src/ibmswtpm2/src/CryptRand.c:366
6	6	1 : View List ['TpmFail']	6	6	DRBG_Generate	call site: 00177	/src/ibmswtpm2/src/CryptRand.c:761
6	6	1 : View List ['TpmFail']	6	6	UINT16_Marshal	call site: 01072	/src/ibmswtpm2/src/Marshal.c:99
6	6	1 : View List ['TpmFail']	6	6	UINT32_Marshal	call site: 01069	/src/ibmswtpm2/src/Marshal.c:120

Runtime coverage analysis

Covered functions

149

Functions that are reachable but not covered

300

Reachable functions

447

Percentage of reachable functions covered

32.89%

NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
fuzzer.cc	1
NVMem.c	12
Manufacture.c	2
CryptUtil.c	7
AlgorithmCap.c	1
Memory.c	11
Bits.c	3
TpmFail.c	1
RunCommand.c	2
CryptSelfTest.c	2
AlgorithmTests.c	17
CryptSym.c	5
CryptHash.c	22
CryptRsa.c	20
CryptRand.c	17
Entropy.c	2
Clock.c	4
MathOnByteBuffers.c	2
BnMemory.c	5
BnConvert.c	6
BnMath.c	17
TpmToOsslMath.c	12
TpmToOsslSupport.c	3
CryptEccMain.c	13
CryptEccSignature.c	10
Cancel.c	1
NVReserved.c	8
NVDynamic.c	24
PCR.c	13
Hierarchy.c	1
DA.c	3
PP.c	2
CommandAudit.c	3
CommandCodeAttributes.c	9
TPMCmdp.c	6
PowerPlat.c	3
StartupCommands.c	1
Power.c	2
Time.c	5
TcpServerPosix.c	3
IntegrityCommands.c	3
Object.c	15
Handle.c	1
LocalityPlat.c	2
ExecCommand.c	1
Unmarshal.c	14
CommandDispatcher.c	2
Entity.c	4
Session.c	8
ResponseCodeProcessing.c	1
SessionProcess.c	34
Marshal.c	17
PPPlat.c	1
Object_spt.c	1
IoBuffers.c	4
Response.c	1

Analyses and suggestions

Optimal target analysis

Remaining optimal interesting functions

The following table shows a list of functions that are optimal targets. Optimal targets are identified by finding the functions that in combination, yield a high code coverage.

Func name	Functions filename	Arg count	Args	Function depth	instr count	bb count	cyclomatic complexity	Reachable functions	total cyclomatic complexity	Unreached complexity
`TPM2_CreateLoaded`	/src/ibmswtpm2/src/ObjectCommands.c	2	['N/A', 'N/A']	48	404	52	21	363	1716	787
`TPM2_GetCapability`	/src/ibmswtpm2/src/CapabilityCommands.c	2	['N/A', 'N/A']	9	327	31	2	67	297	191
`TPM2_Import`	/src/ibmswtpm2/src/DuplicationCommands.c	2	['N/A', 'N/A']	45	289	41	17	292	1381	174
`TPMS_CAPABILITY_DATA_Unmarshal`	/src/ibmswtpm2/src/Unmarshal.c	3	['N/A', 'N/A', 'N/A']	7	63	9	4	31	166	142
`tpm_server_main`	/src/ibmswtpm2/src/TPMCmds.c	2	['int', 'N/A']	55	215	37	11	479	2164	130
`TPM2_Quote`	/src/ibmswtpm2/src/AttestationCommands.c	2	['N/A', 'N/A']	44	104	10	5	223	1001	120
`TPM2_Startup`	/src/ibmswtpm2/src/StartupCommands.c	1	['N/A']	47	290	46	15	235	1093	103
`TPMS_ATTEST_Unmarshal`	/src/ibmswtpm2/src/Unmarshal.c	3	['N/A', 'N/A', 'N/A']	7	154	24	9	28	127	85
`TPM2_PolicySigned`	/src/ibmswtpm2/src/EACommands.c	2	['N/A', 'N/A']	45	238	22	9	216	996	79
`TPMS_CAPABILITY_DATA_Marshal`	/src/ibmswtpm2/src/Marshal.c	3	['N/A', 'N/A', 'N/A']	10	49	3	2	34	112	73

Implementing fuzzers that target the above functions will improve reachability such that it becomes:

Functions statically reachable by fuzzers

765 / 1125

Cyclomatic complexity statically reachable by fuzzers

3796 / 5637

All functions overview

If you implement fuzzers for these functions, the status of all functions in the project will be:

Func name	Functions filename	Args	Function call depth	Reached by Fuzzers	Fuzzers runtime hit	Func lines hit %	I Count	BB Count	Cyclomatic complexity	Functions reached	Reached by functions	Accumulated cyclomatic complexity	Undiscovered complexity

Fuzz engine guidance

This sections provides heuristics that can be used as input to a fuzz engine when running a given fuzz target. The current focus is on providing input that is usable by libFuzzer.

fuzzer.cc

Dictionary

Use this with the libFuzzer -dict=DICT.file flag

Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['TestAlgorithm', 'CryptRandomGenerate', 'ParseSessionBuffer', 'CommandDispatcher', 'ClearBit', 'ExecuteCommand', 'CryptHashEnd', 'CryptHashEnd2B', 'CommandAuditIsRequired']

Runtime coverage analysis

This section shows analysis of runtime coverage data.

For futher technical details on how this section is generated, please see the Glossary .

Complex functions with low coverage

Func name	Function total lines	Lines covered at runtime	percentage covered	Reached by fuzzers
ParseHandleBuffer	37	18	48.64%	['fuzz_tpm_server']
DRBG_Generate	79	18	22.78%	['fuzz_tpm_server']
EntityGetLoadStatus	85	6	7.058%	['fuzz_tpm_server']
ParseSessionBuffer	101	10	9.900%	['fuzz_tpm_server']
TPM2_Startup	81	4	4.938%	[]
LLVMFuzzerTestOneInput	37	20	54.05%

Files and Directories in report

This section shows which files and directories are considered in this report. The main reason for showing this is fuzz introspector may include more code in the reasoning than is desired. This section helps identify if too many files/directories are included, e.g. third party code, which may be irrelevant for the threat model. In the event too much is included, fuzz introspector supports a configuration file that can exclude data from the report. See the following link for more information on how to create a config file: link

Files in report

Source file	Reached by	Covered by
	[]	[]
/src/ibmswtpm2/src/Unmarshal.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/Response.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/NVCommands.c	[]	[]
/src/ibmswtpm2/src/TpmFail.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/TPMCmds.c	[]	[]
/src/ibmswtpm2/src/ntc2lib.c	[]	[]
/src/ibmswtpm2/src/BnMemory.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/IntegrityCommands.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/TestingCommands.c	[]	[]
/src/ibmswtpm2/src/CapabilityCommands.c	[]	[]
/src/ibmswtpm2/src/LocalityPlat.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/PP.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/CryptPrimeSieve.c	[]	[]
/src/ibmswtpm2/src/Marshal.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/CryptEccKeyExchange.c	[]	[]
/src/ibmswtpm2/src/Bits.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/Power.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/TpmToOsslMath.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/Locality.c	[]	[]
/src/ibmswtpm2/src/PropertyCap.c	[]	[]
/src/ibmswtpm2/src/CommandDispatcher.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/HashCommands.c	[]	[]
/src/ibmswtpm2/src/Vendor_TCG_Test.c	[]	[]
/src/ibmswtpm2/src/TpmSizeChecks.c	[]	[]
/src/ibmswtpm2/src/AuditCommands.c	[]	[]
/src/ibmswtpm2/src/ManagementCommands.c	[]	[]
/src/ibmswtpm2/src/NVMem.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/DA.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/EncryptDecrypt_spt.c	[]	[]
/src/ibmswtpm2/src/Time.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/HierarchyCommands.c	[]	[]
/src/ibmswtpm2/src/MathOnByteBuffers.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/PCR.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/BnConvert.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/Unique.c	[]	[]
/src/ibmswtpm2/src/CryptCmac.c	[]	[]
/src/ibmswtpm2/src/Hierarchy.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/AlgorithmCap.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/AsymmetricCommands.c	[]	[]
/src/ibmswtpm2/src/CryptEccSignature.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/RunCommand.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/ObjectCommands.c	[]	[]
/src/ibmswtpm2/src/CryptSym.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/Policy_spt.c	[]	[]
/src/ibmswtpm2/src/StartupCommands.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/Manufacture.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/SessionProcess.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/Cancel.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/ClockCommands.c	[]	[]
/src/ibmswtpm2/src/ResponseCodeProcessing.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/NVReserved.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/TPMCmdp.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/SessionCommands.c	[]	[]
/src/ibmswtpm2/src/DictionaryCommands.c	[]	[]
/src/ibmswtpm2/src/PowerPlat.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/CryptSmac.c	[]	[]
/src/ibmswtpm2/src/NV_spt.c	[]	[]
/src/ibmswtpm2/src/CommandCodeAttributes.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/Memory.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/CryptEccMain.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/DuplicationCommands.c	[]	[]
/src/ibmswtpm2/src/Entity.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/TpmToOsslSupport.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/CryptUtil.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/CryptRand.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/CryptPrime.c	[]	[]
/src/ibmswtpm2/src/ExecCommand.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/Handle.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/BnMath.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/Context_spt.c	[]	[]
/src/ibmswtpm2/src/PPPlat.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/ntc2.c	[]	[]
/src/ibmswtpm2/src/Clock.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/CryptSelfTest.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/RandomCommands.c	[]	[]
/src/ibmswtpm2/src/EphemeralCommands.c	[]	[]
/src/ibmswtpm2/src/Session.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/AttestationCommands.c	[]	[]
/src/ibmswtpm2/src/IoBuffers.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/Object.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/Entropy.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/ContextCommands.c	[]	[]
/src/ibmswtpm2/src/SymmetricCommands.c	[]	[]
/src/ibmswtpm2/src/Object_spt.c	['fuzz_tpm_server']	[]
/src/ibmswtpm2/src/Attest_spt.c	[]	[]
/src/ibmswtpm2/src/CryptHash.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/TcpServerPosix.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/fuzzer.cc	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/SigningCommands.c	[]	[]
/src/ibmswtpm2/src/AlgorithmTests.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/CryptRsa.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/EACommands.c	[]	[]
/src/ibmswtpm2/src/CommandAudit.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/NVDynamic.c	['fuzz_tpm_server']	['fuzz_tpm_server']
/src/ibmswtpm2/src/Ticket.c	[]	[]

Directories in report

Directory

/src/ibmswtpm2/src/

Metadata section

This sections shows the raw data that is used to produce this report. This is mainly used for further processing and developer debugging.

Fuzzer Calltree file Program data file Coverage file

fuzz_tpm_server fuzzerLogFile-0-3VNaijythM.data fuzzerLogFile-0-3VNaijythM.data.yaml fuzz_tpm_server.covreport

Table of contents

Project overview: ibmswtpm2

High level conclusions

Reachability and coverage overview

Fuzzers overview

Project functions overview

Fuzzer details

Fuzzer: fuzz_tpm_server

Call tree

Fuzz blockers

Runtime coverage analysis

Files reached

Analyses and suggestions

Optimal target analysis

Remaining optimal interesting functions

All functions overview

Fuzz engine guidance

fuzzer.cc

Dictionary

Fuzzer function priority

Runtime coverage analysis

Complex functions with low coverage

Files and Directories in report

Files in report

Directories in report

Metadata section