High level conclusions

Fuzzer fuzz_sign_verify_with_valid_key is blocked:

The runtime code coverage of fuzz_sign_verify_with_valid_key covers 20.94% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer fuzz_sign_with_valid_key_verify_with_invalid_key is blocked:

The runtime code coverage of fuzz_sign_with_valid_key_verify_with_invalid_key covers 20.46% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer fuzz_simple_sigstore is blocked:

The runtime code coverage of fuzz_simple_sigstore covers 21.18% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer fuzz_with_cert_chain is blocked:

The runtime code coverage of fuzz_with_cert_chain covers 29.80% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer fuzz_sign_then_mutate_verify_with_valid_key is blocked:

The runtime code coverage of fuzz_sign_then_mutate_verify_with_valid_key covers 22.74% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Reachability and coverage overview

Functions statically reachable by fuzzers

155 / 1384

Cyclomatic complexity statically reachable by fuzzers

540 / 4488

Runtime code coverage of functions

351 / 1384

Warning: The number of runtime covered functions are larger than the number of reachable functions. This means that Fuzz Introspector found there are more functions covered at runtime than what is considered reachable based on the static analysis. This is a limitation in the analysis as anything covered at runtime is by definition reachable by the fuzzers.
This is likely due to a limitation in the static analysis. In this case, the count of functions covered at runtime is the true value, which means this is what should be considered "achieved" by the fuzzer.

Use the project functions table below to query all functions that were not covered at runtime.

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	Runtime reached by Fuzzers	Combined 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: fuzz_sign_with_invalid_key

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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	118	59.2%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	81	40.7%
All colors	199	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
26	169	model_signing.signing.Config.sign	call site: 00169	model_signing._signing.sign_pkcs11.CertSigner._get_verification_material
23	77	model_signing._serialization.serialization.should_ignore	call site: 00077	model_signing.hashing.Config._build_sharded_file_hasher_factory._factory
9	39	...model-transparency.tests.fuzzing.fuzz_sign_with_invalid_key.TestOneInput	call site: 00039	model_signing.signing.Config.use_sigstore_signer
8	54	model_signing.hashing.Config.hash	call site: 00054	model_signing.hashing.Config._build_sharded_file_hasher_factory._factory
8	160	model_signing.signing.Config.sign	call site: 00160	model_signing._signing.sign_sigstore.Signer._get_identity_token
5	8	...model-transparency.tests.fuzzing.fuzz_sign_with_invalid_key.TestOneInput	call site: 00008	os.path.join
4	25	model_signing._hashing.memory.SHA256.__init__	call site: 00025	model_signing._hashing.memory.BLAKE2.__init__
4	119	model_signing._serialization.file.Serializer.serialize	call site: 00119	.list
3	0	EP	call site: 00000	atheris.FuzzedDataProvider
3	4	...model-transparency.tests.fuzzing.fuzz_sign_with_invalid_key.TestOneInput	call site: 00004	tempfile.TemporaryDirectory
3	67	model_signing.hashing.Config.hash	call site: 00067	model_signing._serialization.serialization.check_file_or_directory
3	142	model_signing._signing.sign_sigstore_pb.pae	call site: 00142	cryptography.hazmat.primitives.asymmetric.ec.ECDSA.__init__

Runtime coverage analysis

Covered functions

441

Functions that are reachable but not covered

86

Reachable functions

130

Percentage of reachable functions covered

33.85%

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.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
/	1
...model-transparency.tests.fuzzing.fuzz_sign_with_invalid_key	14
model_signing.signing	12
model_signing.hashing	19
model_signing._serialization.file	22
model_signing._hashing.io	3
model_signing._hashing.memory	3
model_signing.manifest	2
model_signing._signing.sign_ec_key	12
model_signing._signing.sign_sigstore	15
model_signing._serialization.file_shard	27
model_signing._serialization.serialization	5
model_signing._signing.signing	7
model_signing._signing.sign_sigstore_pb	1
cryptography.hazmat.primitives.asymmetric.ec	1
model_signing._signing.sign_certificate	7
model_signing._signing.sign_pkcs11	23

Fuzzer: fuzz_sign_then_mutate_verify_with_valid_key

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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	234	65.1%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	125	34.8%
All colors	359	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
74	128	sigstore._internal.sct._pack_signed_entry	call site: 00128	sigstore.verify.verifier._validate_dsse_v002_entry_body
39	63	model_signing._signing.signing.Verifier.verify	call site: 00063	sigstore.verify.verifier.Verifier.verify_dsse
29	308	model_signing.hashing.Config.hash	call site: 00308	model_signing.hashing.Config._build_sharded_file_hasher_factory._factory
22	29	...model-transparency.tests.fuzzing.fuzz_sign_then_mutate_verify_with_valid_key.TestOneInput	call site: 00029	sigstore.models.Bundle.__init__
15	241	model_signing.verifying.Config._guess_hashing_config	call site: 00241	model_signing.hashing.Config.use_shard_serialization
11	103	sigstore._internal.sct._get_signed_certificate_timestamp	call site: 00103	sigstore._internal.sct._cert_is_ca
6	116	sigstore._utils.key_id	call site: 00116	sigstore._internal.sct._pack_digitally_signed
4	207	model_signing.manifest.SerializationType.from_args	call site: 00207	bytes.fromhex
4	232	model_signing.hashing.Config._build_stream_hasher	call site: 00232	model_signing._hashing.memory.BLAKE2.__init__
4	302	model_signing._serialization.file.Serializer.serialize	call site: 00302	.list
3	271	model_signing.hashing.Config.hash	call site: 00271	model_signing.hashing.Config._build_sharded_file_hasher_factory._factory
3	343	model_signing.verifying.Config._get_manifest_diff	call site: 00343	expected_hashes.keys

Runtime coverage analysis

Covered functions

473

Functions that are reachable but not covered

163

Reachable functions

211

Percentage of reachable functions covered

22.75%

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.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
/	1
...model-transparency.tests.fuzzing.fuzz_sign_then_mutate_verify_with_valid_key	21
model_signing.verifying	19
model_signing._signing.sign_ec_key	2
model_signing._signing.sign_sigstore	5
sigstore.models	12
sigstore._utils	15
model_signing._signing.sign_sigstore_pb	4
model_signing._signing.signing	14
sigstore.verify.verifier	47
sigstore._internal.sct	26
sigstore.verify.policy	8
sigstore.dsse	4
cryptography.hazmat.primitives.asymmetric.ec	1
model_signing.manifest	3
model_signing._hashing.memory	3
model_signing.hashing	23
model_signing._serialization.file	22
model_signing._hashing.io	3
model_signing._serialization.file_shard	27
model_signing._serialization.serialization	5

Fuzzer: fuzz_with_cert_chain

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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	282	69.9%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	121	30.0%
All colors	403	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
74	280	sigstore._internal.sct._pack_signed_entry	call site: 00280	sigstore.verify.verifier._validate_dsse_v002_entry_body
48	122	...model-transparency.tests.fuzzing.fuzz_with_cert_chain.gen_ec_key	call site: 00122	model_signing.verifying.Config.use_certificate_verifier
39	215	model_signing._signing.signing.Verifier.verify	call site: 00215	sigstore.verify.verifier.Verifier.verify_dsse
25	179	model_signing._signing.sign_certificate.Verifier.__init__	call site: 00179	model_signing.verifying.Config.verify
18	92	...model-transparency.tests.fuzzing.fuzz_with_cert_chain._pick_sig_hash	call site: 00092	...model-transparency.tests.fuzzing.fuzz_with_cert_chain.gen_name
11	255	sigstore._internal.sct._get_signed_certificate_timestamp	call site: 00255	sigstore._internal.sct._cert_is_ca
6	18	...model-transparency.tests.fuzzing.fuzz_with_cert_chain.gen_name	call site: 00018	...model-transparency.tests.fuzzing.fuzz_with_cert_chain._rand_utf8
6	115	cryptography.x509.extensions.AuthorityKeyIdentifier.__init__	call site: 00115	cryptography.x509.extensions.SubjectKeyIdentifier.from_public_key
6	268	sigstore._utils.key_id	call site: 00268	sigstore._internal.sct._pack_digitally_signed
4	25	...model-transparency.tests.fuzzing.fuzz_with_cert_chain.gen_name	call site: 00025	...model-transparency.tests.fuzzing.fuzz_with_cert_chain._rand_utf8
4	85	cryptography.x509.extensions.SubjectKeyIdentifier.from_public_key	call site: 00085	cryptography.x509.base.CertificateBuilder.sign
4	359	model_signing.manifest.SerializationType.from_args	call site: 00359	bytes.fromhex

Runtime coverage analysis

Covered functions

478

Functions that are reachable but not covered

146

Reachable functions

208

Percentage of reachable functions covered

29.81%

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.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
/	1
...model-transparency.tests.fuzzing.fuzz_with_cert_chain	54
cryptography.hazmat.primitives.asymmetric.rsa	2
cryptography.x509.base	10
cryptography.x509.extensions	9
model_signing.verifying	15
model_signing._signing.sign_certificate	8
model_signing._signing.sign_sigstore	5
sigstore.models	12
sigstore._utils	15
model_signing._signing.sign_sigstore_pb	4
model_signing._signing.signing	13
sigstore.verify.verifier	47
sigstore._internal.sct	26
sigstore.verify.policy	8
sigstore.dsse	4
cryptography.hazmat.primitives.asymmetric.ec	1
model_signing.manifest	3
model_signing._hashing.memory	1

Fuzzer: fuzz_simple_sigstore

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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	406	71.6%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	161	28.3%
All colors	567	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
73	433	sigstore._internal.sct._pack_signed_entry	call site: 00433	sigstore.verify.verifier._validate_dsse_v002_entry_body
41	276	sigstore.oidc.IdentityToken.__init__	call site: 00276	sigstore.oidc.Issuer.identity_token
39	368	model_signing._signing.signing.Verifier.verify	call site: 00368	sigstore.verify.verifier.Verifier.verify_dsse
26	97	sigstore._internal.tuf.TrustUpdater.get_signing_config_path	call site: 00097	sigstore.models.ClientTrustConfig.from_tuf
23	154	model_signing._serialization.serialization.should_ignore	call site: 00154	model_signing.hashing.Config._build_sharded_file_hasher_factory._factory
23	218	model_signing._signing.sign_sigstore_pb.pae	call site: 00218	model_signing._signing.sign_pkcs11.CertSigner._get_verification_material
22	334	...model-transparency.tests.fuzzing.fuzz_simple_sigstore.TestOneInput	call site: 00334	sigstore.models.Bundle.__init__
20	75	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00075	sigstore._internal.tuf.TrustUpdater.get_trusted_root_path
15	1	...model-transparency.tests.fuzzing.fuzz_simple_sigstore.TestOneInput	call site: 00001	sigstore.models.TrustedRoot.from_file
11	408	sigstore._internal.sct._get_signed_certificate_timestamp	call site: 00408	sigstore._internal.sct._cert_is_ca
10	527	model_signing.verifying.Config._guess_hashing_config	call site: 00527	model_signing.hashing.Config.use_shard_serialization
8	135	model_signing.hashing.Config.hash	call site: 00135	model_signing.hashing.Config._build_sharded_file_hasher_factory._factory

Runtime coverage analysis

Covered functions

474

Functions that are reachable but not covered

253

Reachable functions

321

Percentage of reachable functions covered

21.18%

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.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
/	1
...model-transparency.tests.fuzzing.fuzz_simple_sigstore	23
sigstore.models	25
model_signing.signing	12
model_signing.hashing	23
model_signing._serialization.file	22
model_signing._hashing.io	3
model_signing._hashing.memory	3
model_signing.manifest	3
model_signing._signing.sign_sigstore	21
sigstore._internal.tuf	18
sigstore._utils	18
sigstore.oidc	26
sigstore.sign	4
model_signing._serialization.file_shard	27
model_signing._serialization.serialization	5
model_signing._signing.signing	18
model_signing._signing.sign_pkcs11	23
model_signing._signing.sign_sigstore_pb	6
model_signing._signing.sign_ec_key	15
cryptography.hazmat.primitives.asymmetric.ec	1
model_signing._signing.sign_certificate	7
sigstore.dsse	7
sigstore._internal.oidc.oauth	9
model_signing.verifying	19
sigstore.verify.policy	9
sigstore.verify.verifier	47
sigstore._internal.sct	26

Fuzzer: fuzz_sign_with_valid_key_verify_with_invalid_key

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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	330	77.4%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	96	22.5%
All colors	426	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
73	307	sigstore._internal.sct._pack_signed_entry	call site: 00307	sigstore.verify.verifier._validate_dsse_v002_entry_body
41	103	sigstore.oidc.IdentityToken.__init__	call site: 00103	sigstore.oidc.Issuer.identity_token
39	242	model_signing._signing.signing.Verifier.verify	call site: 00242	sigstore.verify.verifier.Verifier.verify_dsse
26	58	sigstore._internal.tuf.TrustUpdater.get_signing_config_path	call site: 00058	sigstore.models.ClientTrustConfig.from_tuf
26	168	model_signing.signing.Config.sign	call site: 00168	model_signing._signing.sign_pkcs11.CertSigner._get_verification_material
23	208	model_signing._signing.sign_ec_key.Verifier.__init__	call site: 00208	model_signing.verifying.Config.verify
20	36	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00036	sigstore._internal.tuf.TrustUpdater.get_trusted_root_path
11	282	sigstore._internal.sct._get_signed_certificate_timestamp	call site: 00282	sigstore._internal.sct._cert_is_ca
7	95	model_signing.signing.Config.sign	call site: 00095	sigstore.oidc.IdentityToken.__init__
6	1	...model-transparency.tests.fuzzing.fuzz_sign_with_valid_key_verify_with_invalid_key.TestOneInput	call site: 00001	fdp.ConsumeIntInRange
6	295	sigstore._utils.key_id	call site: 00295	sigstore._internal.sct._pack_digitally_signed
5	17	...model-transparency.tests.fuzzing.fuzz_sign_with_valid_key_verify_with_invalid_key.TestOneInput	call site: 00017	sigstore.models.ClientTrustConfig.from_tuf

Runtime coverage analysis

Covered functions

473

Functions that are reachable but not covered

206

Reachable functions

259

Percentage of reachable functions covered

20.46%

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.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
/	1
...model-transparency.tests.fuzzing.fuzz_sign_with_valid_key_verify_with_invalid_key	17
model_signing.signing	11
model_signing._signing.sign_ec_key	13
model_signing._signing.sign_sigstore	20
sigstore.models	23
sigstore._internal.tuf	18
sigstore._utils	18
sigstore.oidc	26
sigstore.sign	4
model_signing._signing.signing	17
model_signing._hashing.memory	1
sigstore.dsse	7
sigstore._internal.oidc.oauth	9
model_signing._signing.sign_sigstore_pb	6
cryptography.hazmat.primitives.asymmetric.ec	1
model_signing._signing.sign_certificate	7
model_signing._signing.sign_pkcs11	23
model_signing.verifying	15
sigstore.verify.verifier	47
sigstore._internal.sct	26
sigstore.verify.policy	8
model_signing.manifest	3

Fuzzer: fuzz_sign_verify_with_valid_key

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

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	177	73.7%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	63	26.2%
All colors	240	100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
74	119	sigstore._internal.sct._pack_signed_entry	call site: 00119	sigstore.verify.verifier._validate_dsse_v002_entry_body
39	54	model_signing._signing.signing.Verifier.verify	call site: 00054	sigstore.verify.verifier.Verifier.verify_dsse
22	20	...model-transparency.tests.fuzzing.fuzz_sign_verify_with_valid_key.TestOneInput	call site: 00020	sigstore.models.Bundle.__init__
11	94	sigstore._internal.sct._get_signed_certificate_timestamp	call site: 00094	sigstore._internal.sct._cert_is_ca
6	107	sigstore._utils.key_id	call site: 00107	sigstore._internal.sct._pack_digitally_signed
4	198	model_signing.manifest.SerializationType.from_args	call site: 00198	bytes.fromhex
3	213	model_signing.verifying.Config.verify	call site: 00213	model_signing.manifest.Manifest.resource_descriptors
3	224	model_signing.verifying.Config._get_manifest_diff	call site: 00224	expected_hashes.keys
3	230	model_signing.verifying.Config._get_manifest_diff	call site: 00230	actual_hashes.keys
2	1	...model-transparency.tests.fuzzing.fuzz_sign_verify_with_valid_key.TestOneInput	call site: 00001	tempfile.TemporaryDirectory
2	43	sigstore.models.TransparencyLogEntry.__init__	call site: 00043	_logger.debug
2	116	sigstore._internal.sct._pack_signed_entry	call site: 00116	.len

Runtime coverage analysis

Covered functions

473

Functions that are reachable but not covered

117

Reachable functions

148

Percentage of reachable functions covered

20.95%

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.

Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
/	1
...model-transparency.tests.fuzzing.fuzz_sign_verify_with_valid_key	15
model_signing.verifying	15
model_signing._signing.sign_ec_key	2
model_signing._signing.sign_sigstore	5
sigstore.models	12
sigstore._utils	15
model_signing._signing.sign_sigstore_pb	4
model_signing._signing.signing	14
sigstore.verify.verifier	47
sigstore._internal.sct	26
sigstore.verify.policy	8
sigstore.dsse	4
cryptography.hazmat.primitives.asymmetric.ec	1
model_signing.manifest	3
model_signing._hashing.memory	1

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	hitcount	instr count	bb count	cyclomatic complexity	Reachable functions	Incoming references	total cyclomatic complexity	Unreached complexity
sigstore._cli.main	sigstore._cli	1	['N/A']	7	0	12	12	8	237	1	771	408
cryptography.hazmat.primitives.serialization.ssh.SSHCertificateBuilder.sign	cryptography.hazmat.primitives.serialization.ssh	2	['N/A', 'N/A']	6	0	37	11	7	52	0	174	141
model_signing._signing.pkcs11uri.Pkcs11URI.login	model_signing._signing.pkcs11uri	1	['N/A']	3	0	2	4	5	31	3	108	90
cryptography.hazmat.primitives.serialization.ssh.load_ssh_private_key	cryptography.hazmat.primitives.serialization.ssh	4	['N/A', 'N/A', 'N/A', 'N/A']	5	0	12	15	9	35	0	116	82
cryptography.x509.name._RFC4514NameParser._parse_na	cryptography.x509.name	1	['N/A']	4	0	1	2	4	18	3	62	53
cryptography.fernet.Fernet._decrypt_data	cryptography.fernet	4	['N/A', 'N/A', 'N/A', 'N/A']	4	0	1	3	4	25	2	81	50
sigstore._internal.rekor.checkpoint.verify_checkpoint	sigstore._internal.rekor.checkpoint	2	['N/A', 'N/A']	3	0	2	2	4	18	1	61	43

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

Functions statically reachable by fuzzers

244 / 1384

Cyclomatic complexity statically reachable by fuzzers

891 / 4488

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	Runtime reached by Fuzzers	Combined 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

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.

/src/model-transparency/tests/fuzzing/fuzz_sign_with_invalid_key.py

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=['model_signing.signing.Config.sign', 'model_signing._serialization.serialization.should_ignore', '...model-transparency.tests.fuzzing.fuzz_sign_with_invalid_key.TestOneInput', 'model_signing.hashing.Config.hash', 'model_signing._hashing.memory.SHA256.__init__', 'model_signing._serialization.file.Serializer.serialize']

/src/model-transparency/tests/fuzzing/fuzz_sign_then_mutate_verify_with_valid_key.py

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=['sigstore._internal.sct._pack_signed_entry', 'model_signing._signing.signing.Verifier.verify', 'model_signing.hashing.Config.hash', '...model-transparency.tests.fuzzing.fuzz_sign_then_mutate_verify_with_valid_key.TestOneInput', 'model_signing.verifying.Config._guess_hashing_config', 'sigstore._internal.sct._get_signed_certificate_timestamp', 'sigstore._utils.key_id', 'model_signing.manifest.SerializationType.from_args', 'model_signing.hashing.Config._build_stream_hasher', 'model_signing._serialization.file.Serializer.serialize']

/src/model-transparency/tests/fuzzing/fuzz_with_cert_chain.py

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=['sigstore._internal.sct._pack_signed_entry', '...model-transparency.tests.fuzzing.fuzz_with_cert_chain.gen_ec_key', 'model_signing._signing.signing.Verifier.verify', 'model_signing._signing.sign_certificate.Verifier.__init__', '...model-transparency.tests.fuzzing.fuzz_with_cert_chain._pick_sig_hash', 'sigstore._internal.sct._get_signed_certificate_timestamp', '...model-transparency.tests.fuzzing.fuzz_with_cert_chain.gen_name', 'cryptography.x509.extensions.AuthorityKeyIdentifier.__init__', 'sigstore._utils.key_id']

/src/model-transparency/tests/fuzzing/fuzz_simple_sigstore.py

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=['sigstore._internal.sct._pack_signed_entry', 'sigstore.oidc.IdentityToken.__init__', 'model_signing._signing.signing.Verifier.verify', 'sigstore._internal.tuf.TrustUpdater.get_signing_config_path', 'model_signing._serialization.serialization.should_ignore', 'model_signing._signing.sign_sigstore_pb.pae', '...model-transparency.tests.fuzzing.fuzz_simple_sigstore.TestOneInput', 'sigstore._internal.tuf.TrustUpdater.__init__', 'sigstore._internal.sct._get_signed_certificate_timestamp']

/src/model-transparency/tests/fuzzing/fuzz_sign_with_valid_key_verify_with_invalid_key.py

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=['sigstore._internal.sct._pack_signed_entry', 'sigstore.oidc.IdentityToken.__init__', 'model_signing._signing.signing.Verifier.verify', 'sigstore._internal.tuf.TrustUpdater.get_signing_config_path', 'model_signing.signing.Config.sign', 'model_signing._signing.sign_ec_key.Verifier.__init__', 'sigstore._internal.tuf.TrustUpdater.__init__', 'sigstore._internal.sct._get_signed_certificate_timestamp', '...model-transparency.tests.fuzzing.fuzz_sign_with_valid_key_verify_with_invalid_key.TestOneInput']

/src/model-transparency/tests/fuzzing/fuzz_sign_verify_with_valid_key.py

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=['sigstore._internal.sct._pack_signed_entry', 'model_signing._signing.signing.Verifier.verify', '...model-transparency.tests.fuzzing.fuzz_sign_verify_with_valid_key.TestOneInput', 'sigstore._internal.sct._get_signed_certificate_timestamp', 'sigstore._utils.key_id', 'model_signing.manifest.SerializationType.from_args', 'model_signing.verifying.Config.verify', 'model_signing.verifying.Config._get_manifest_diff']

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
os.path.basename	290	131	45.17%	['fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_sign_with_invalid_key']
typing_extensions.dataclass_transform	1712	558	32.59%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
OpenSSL.crypto.X509StoreContext	880	267	30.34%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
re.match	76	15	19.73%	['fuzz_sign_with_invalid_key']
cryptography.hazmat.primitives.serialization.ssh.load_ssh_private_key	68	0	0.0%	[]
cryptography.hazmat.primitives.serialization.ssh._serialize_ssh_private_key	52	5	9.615%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
cryptography.hazmat.primitives.serialization.ssh._load_ssh_public_identity	56	0	0.0%	[]
cryptography.hazmat.primitives.serialization.ssh.SSHCertificateBuilder.sign	85	0	0.0%	[]
val.to_bytes	91	38	41.75%	['fuzz_sign_with_invalid_key']
point.tobytes	96	43	44.79%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
resources.append	1640	2	0.121%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
statement.Statement	31	13	41.93%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
google.protobuf.json_format.MessageToJson	492	133	27.03%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
signer.sign_dsse	89	31	34.83%	['fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key']
asn1crypto.keys.PublicKeyInfo.dump	350	177	50.57%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
asn1crypto.core.OctetString.load	2168	465	21.44%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
hash.finalize	73	27	36.98%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
i.isdigit	141	16	11.34%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
p.is_absolute	46	21	45.65%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
r.pop	109	13	11.92%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
os.getenv	290	131	45.17%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
signer._signing_cert	89	31	34.83%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
val.lower	91	38	41.75%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
OpenSSL.crypto.X509StoreContext.get_verified_chain	880	267	30.34%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
pydantic.model_validator	56	28	50.0%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
response.raise_for_status	658	142	21.58%	['fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']
collections.defaultdict	234	76	32.47%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
jwt.decode	165	37	22.42%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
verifier.verify_artifact	235	51	21.70%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
fields.extend	54	4	7.407%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
sct.log_id.hex	88	21	23.86%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
timestamp.timestamp	46	25	54.34%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
sign.add_argument_group	93	39	41.93%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']
verify.add_subparsers	190	41	21.57%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_with_cert_chain']

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
	[]	[]
sigstore_models	[]	[]
cryptography.hazmat.primitives.poly1305	[]	[]
cryptography.hazmat.backends.openssl.backend	[]	[]
model_signing._signing	[]	[]
cryptography.hazmat.bindings._rust	[]	[]
sigstore._internal	[]	[]
sigstore._internal.sct	['fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
...model-transparency.tests.fuzzing.fuzz_sign_with_valid_key_verify_with_invalid_key	['fuzz_sign_with_valid_key_verify_with_invalid_key']	[]
threading	[]	[]
model_signing._hashing.hashing	[]	[]
binascii	[]	[]
sigstore.oidc	['fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key']	[]
cryptography.hazmat.primitives.asymmetric.padding	[]	[]
sigstore.dsse	['fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
model_signing._serialization.serialization	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']	[]
functools	[]	[]
random	[]	[]
types	[]	[]
...model-transparency.tests.fuzzing.fuzz_simple_sigstore	['fuzz_simple_sigstore']	[]
sigstore._internal.rekor.client	[]	[]
datetime	[]	[]
cryptography.hazmat.backends	[]	[]
cryptography.hazmat.primitives.asymmetric.rsa	['fuzz_with_cert_chain']	[]
sigstore._internal.oidc.oauth	['fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key']	[]
sigstore._internal.rekor.client_v2	[]	[]
cryptography.hazmat.primitives.ciphers.algorithms	[]	[]
cryptography.x509.oid	[]	[]
sys	[]	[]
cryptography.hazmat.primitives.kdf.pbkdf2	[]	[]
stat	[]	[]
cryptography.hazmat.primitives	[]	[]
cryptography.hazmat.primitives.ciphers.base	[]	[]
tempfile	[]	[]
model_signing.verifying	['fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
sigstore	[]	[]
cryptography.hazmat.primitives.twofactor.hotp	[]	[]
cryptography.utils	[]	[]
cryptography.x509	[]	[]
cryptography.x509.ocsp	[]	[]
model_signing._serialization	[]	[]
google	[]	[]
cryptography.hazmat.primitives.kdf.hkdf	[]	[]
cryptography.hazmat.backends.openssl	[]	[]
cryptography.hazmat.bindings	[]	[]
cryptography.__about__	[]	[]
model_signing.hashing	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']	[]
cryptography.hazmat.primitives.asymmetric.dsa	[]	[]
itertools	[]	[]
base64	[]	[]
sigstore._store	[]	[]
cryptography.hazmat.primitives.asymmetric.dh	[]	[]
requests	[]	[]
sigstore._cli	[]	[]
bcrypt	[]	[]
cryptography.x509.verification	[]	[]
cryptography.exceptions	[]	[]
cryptography.hazmat	[]	[]
cryptography.hazmat.bindings.openssl.binding	[]	[]
sigstore.models	['fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
cryptography.x509.name	[]	[]
cryptography.hazmat._oid	[]	[]
cryptography.hazmat.primitives.asymmetric	[]	[]
warnings	[]	[]
model_signing._signing.sign_certificate	['fuzz_sign_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key']	[]
cryptography.hazmat.primitives.kdf.concatkdf	[]	[]
...model-transparency.tests.fuzzing.fuzz_sign_then_mutate_verify_with_valid_key	['fuzz_sign_then_mutate_verify_with_valid_key']	[]
cryptography.hazmat.primitives.asymmetric.x448	[]	[]
enum	[]	[]
...model-transparency.tests.fuzzing.fuzz_sign_verify_with_valid_key	['fuzz_sign_verify_with_valid_key']	[]
os	[]	[]
model_signing._signing.sign_pkcs11	['fuzz_sign_with_invalid_key', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key']	[]
importlib_resources	[]	[]
cryptography.hazmat.primitives.serialization.base	[]	[]
pyasn1	[]	[]
cryptography.x509.extensions	['fuzz_with_cert_chain']	[]
hashlib	[]	[]
sigstore._internal.merkle	[]	[]
sigstore._internal.fulcio	[]	[]
cryptography.hazmat.primitives.kdf	[]	[]
cryptography	[]	[]
sigstore.dsse._predicate	[]	[]
cryptography.hazmat.decrepit	[]	[]
cryptography.hazmat.primitives.asymmetric.x25519	[]	[]
cryptography.hazmat.decrepit.ciphers.algorithms	[]	[]
cryptography.hazmat.primitives.twofactor.totp	[]	[]
struct	[]	[]
rfc8785	[]	[]
cryptography.hazmat.primitives.constant_time	[]	[]
typing_extensions	[]	[]
model_signing.__main__	[]	[]
cryptography.hazmat.primitives.kdf.scrypt	[]	[]
rich	[]	[]
cryptography.hazmat.bindings.openssl._conditional	[]	[]
atheris	[]	[]
sigstore._internal.timestamp	[]	[]
model_signing._signing.pkcs11uri	[]	[]
model_signing._signing.sign_ec_key	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
cryptography.hazmat.primitives._asymmetric	[]	[]
typing	[]	[]
sigstore.__main__	[]	[]
hmac	[]	[]
cryptography.hazmat.asn1	[]	[]
sigstore._utils	['fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
...model-transparency.tests.fuzzing.fuzz_with_cert_chain	['fuzz_with_cert_chain']	[]
urllib	[]	[]
cryptography.x509.general_name	[]	[]
model_signing._hashing	[]	[]
rekor_types	[]	[]
cryptography.hazmat.primitives.asymmetric.ed448	[]	[]
click	[]	[]
cryptography.hazmat.primitives.serialization.pkcs7	[]	[]
certifi	[]	[]
atexit	[]	[]
id	[]	[]
tuf	[]	[]
textwrap	[]	[]
model_signing._signing.signing	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
cryptography.hazmat.primitives.ciphers	[]	[]
model_signing.signing	['fuzz_sign_with_invalid_key', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key']	[]
cryptography.x509.certificate_transparency	[]	[]
blake3	[]	[]
utils	[]	[]
cryptography.hazmat.primitives.serialization	[]	[]
cryptography.hazmat.primitives.twofactor	[]	[]
sigstore.sign	['fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key']	[]
sigstore.verify	[]	[]
cryptography.hazmat.decrepit.ciphers	[]	[]
sigstore.verify.verifier	['fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
argparse	[]	[]
model_signing._serialization.file_shard	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']	[]
cryptography.hazmat.primitives._serialization	[]	[]
sigstore._internal.oidc	[]	[]
dataclasses	[]	[]
OpenSSL	[]	[]
cryptography.x509.base	['fuzz_with_cert_chain']	[]
opentelemetry	[]	[]
cryptography.hazmat.primitives.serialization.ssh	[]	[]
webbrowser	[]	[]
sigstore._internal.rekor	[]	[]
cryptography.hazmat.primitives._cipheralgorithm	[]	[]
cryptography.hazmat.bindings.openssl	[]	[]
model_signing._serialization.file	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']	[]
io	[]	[]
model_signing	[]	[]
math	[]	[]
sigstore.hashes	[]	[]
cryptography.hazmat.primitives.padding	[]	[]
re	[]	[]
cryptography.fernet	[]	[]
cryptography.hazmat.primitives.ciphers.aead	[]	[]
sigstore._internal.tuf	['fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key']	[]
jwt	[]	[]
cryptography.hazmat.primitives.keywrap	[]	[]
cryptography.hazmat.primitives.asymmetric.utils	[]	[]
model_signing._hashing.memory	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
...model-transparency.tests.fuzzing.fuzz_sign_with_invalid_key	['fuzz_sign_with_invalid_key']	[]
sigstore.errors	[]	[]
model_signing._hashing.io	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']	[]
cryptography.hazmat.primitives.cmac	[]	[]
cryptography.hazmat.primitives.asymmetric.types	[]	[]
PyKCS11	[]	[]
email	[]	[]
cryptography.hazmat.primitives.ciphers.modes	[]	[]
json	[]	[]
model_signing._cli	[]	[]
logging	[]	[]
pydantic	[]	[]
glob	[]	[]
cryptography.hazmat.primitives.hmac	[]	[]
model_signing._signing.sign_sigstore	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
asn1crypto	[]	[]
model_signing._signing.sign_sigstore_pb	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
	[]	[]
cryptography.hazmat.asn1.asn1	[]	[]
collections	[]	[]
cryptography.hazmat.primitives.kdf.argon2	[]	[]
cryptography.hazmat.primitives.asymmetric.ec	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
importlib	[]	[]
rfc3161_client	[]	[]
sigstore._internal.rekor.checkpoint	[]	[]
sigstore.verify.policy	['fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
cryptography.hazmat.primitives.kdf.x963kdf	[]	[]
cryptography.hazmat.primitives.hashes	[]	[]
sigstore._internal.key_details	[]	[]
platformdirs	[]	[]
uuid	[]	[]
cryptography.hazmat.primitives.serialization.pkcs12	[]	[]
sigstore._internal.fulcio.client	[]	[]
pathlib	[]	[]
cryptography.hazmat.primitives.asymmetric.ed25519	[]	[]
time	[]	[]
sigstore._internal.trust	[]	[]
cryptography.hazmat.primitives.kdf.kbkdf	[]	[]
model_signing.manifest	['fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_simple_sigstore', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key']	[]
shutil	[]	[]

Directories in report

Directory