High level conclusions

Fuzzer fuzz_sign_verify_with_valid_key is blocked:

The runtime code coverage of fuzz_sign_verify_with_valid_key covers 21.72% 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 16.49% 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 29.10% 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 22.30% 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 25.92% 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

161 / 1388

Cyclomatic complexity statically reachable by fuzzers

559 / 4502

Runtime code coverage of functions

369 / 1388

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	88	43.7%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	113	56.2%
All colors	201	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	170	model_signing.signing.Config.sign	call site: 00170	model_signing._signing.sign_pkcs11.CertSigner._get_verification_material
10	40	model_signing._signing.sign_ec_key.Signer.__init__	call site: 00040	model_signing.signing.Config.sign
8	138	model_signing.signing.Config.sign	call site: 00138	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	92	model_signing._serialization.file.Serializer.serialize	call site: 00092	.list
4	121	model_signing._serialization.file_shard.Serializer.serialize	call site: 00121	.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	33	model_signing.manifest._FileSerialization.__init__	call site: 00033	model_signing.signing.Config.use_elliptic_key_signer
3	153	model_signing._signing.sign_sigstore_pb.pae	call site: 00153	cryptography.hazmat.primitives.asymmetric.ec.ECDSA.__init__
2	28	model_signing._hashing.memory.BLAKE2.__init__	call site: 00028	model_signing._hashing.memory.BLAKE3.__init__
2	149	model_signing._signing.sign_ec_key.Signer.sign	call site: 00149	model_signing._signing.sign_sigstore_pb.pae

Runtime coverage analysis

Covered functions

458

Functions that are reachable but not covered

82

Reachable functions

133

Percentage of reachable functions covered

38.35%

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	16
model_signing.signing	11
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	16
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	344	62.5%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	206	37.4%
All colors	550	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
41	204	sigstore.oidc.IdentityToken.__init__	call site: 00204	sigstore.oidc.Issuer.identity_token
38	350	model_signing._signing.signing.Verifier.verify	call site: 00350	sigstore.verify.verifier.Verifier.verify_dsse
30	458	sigstore._utils.sha256_digest	call site: 00458	sigstore.verify.verifier._validate_dsse_v001_entry_body
26	82	sigstore._internal.tuf.TrustUpdater.get_signing_config_path	call site: 00082	sigstore.models.ClientTrustConfig.from_tuf
25	317	...model-transparency.tests.fuzzing.fuzz_sign_then_mutate_verify_with_valid_key.TestOneInput	call site: 00317	sigstore.models.Bundle.__init__
24	433	sigstore.verify.policy._SingleX509ExtPolicy.verify	call site: 00433	sigstore.verify.verifier._validate_dsse_v002_entry_body
23	57	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00057	sigstore._internal.tuf.TrustUpdater.get_trusted_root_path
23	251	model_signing._signing.sign_sigstore_pb.pae	call site: 00251	model_signing._signing.sign_pkcs11.CertSigner._get_verification_material
19	389	sigstore._internal.sct._get_signed_certificate_timestamp	call site: 00389	sigstore._internal.sct._pack_digitally_signed
16	416	sigstore._internal.sct._pack_signed_entry	call site: 00416	sigstore.verify.policy.Identity.verify
6	45	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00045	sigstore._internal.tuf._get_dirs
6	506	model_signing._signing.signing.dsse_payload_to_manifest	call site: 00506	model_signing.verifying.Config._guess_hashing_config

Runtime coverage analysis

Covered functions

493

Functions that are reachable but not covered

240

Reachable functions

324

Percentage of reachable functions covered

25.93%

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	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_ec_key	13
model_signing._signing.sign_sigstore	20
sigstore.models	23
sigstore._internal.tuf	20
sigstore._utils	18
sigstore.oidc	26
sigstore.sign	4
model_signing._serialization.file_shard	27
model_signing._serialization.serialization	5
model_signing._signing.signing	17
sigstore.dsse	7
sigstore._internal.oidc.oauth	9
model_signing._signing.sign_pkcs11	23
model_signing._signing.sign_sigstore_pb	6
cryptography.hazmat.primitives.asymmetric.ec	1
model_signing._signing.sign_certificate	7
model_signing.verifying	20
sigstore.verify.verifier	47
sigstore._internal.sct	26
sigstore.verify.policy	8

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	332	75.6%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	107	24.3%
All colors	439	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
41	162	sigstore.oidc.IdentityToken.__init__	call site: 00162	sigstore.oidc.Issuer.identity_token
38	253	model_signing._signing.signing.Verifier.verify	call site: 00253	sigstore.verify.verifier.Verifier.verify_dsse
30	361	sigstore._utils.sha256_digest	call site: 00361	sigstore.verify.verifier._validate_dsse_v001_entry_body
26	62	sigstore._internal.tuf.TrustUpdater.get_signing_config_path	call site: 00062	sigstore.models.ClientTrustConfig.from_tuf
25	219	...model-transparency.tests.fuzzing.fuzz_sign_with_valid_key_verify_with_invalid_key.TestOneInput	call site: 00219	sigstore.models.Bundle.__init__
24	336	sigstore.verify.policy._SingleX509ExtPolicy.verify	call site: 00336	sigstore.verify.verifier._validate_dsse_v002_entry_body
23	37	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00037	sigstore._internal.tuf.TrustUpdater.get_trusted_root_path
23	104	model_signing._signing.sign_sigstore_pb.pae	call site: 00104	model_signing._signing.sign_pkcs11.CertSigner._get_verification_material
19	292	sigstore._internal.sct._get_signed_certificate_timestamp	call site: 00292	sigstore._internal.sct._pack_digitally_signed
16	319	sigstore._internal.sct._pack_signed_entry	call site: 00319	sigstore.verify.policy.Identity.verify
6	1	...model-transparency.tests.fuzzing.fuzz_sign_with_valid_key_verify_with_invalid_key.TestOneInput	call site: 00001	fdp.ConsumeIntInRange
6	25	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00025	sigstore._internal.tuf._get_dirs

Runtime coverage analysis

Covered functions

493

Functions that are reachable but not covered

209

Reachable functions

269

Percentage of reachable functions covered

22.3%

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	20
model_signing.signing	11
model_signing._signing.sign_ec_key	18
model_signing._signing.sign_sigstore	20
sigstore.models	23
sigstore._internal.tuf	20
sigstore._utils	18
sigstore.oidc	26
sigstore.sign	4
model_signing._signing.signing	18
model_signing._hashing.memory	1
model_signing._signing.sign_pkcs11	23
model_signing._signing.sign_sigstore_pb	6
cryptography.hazmat.primitives.asymmetric.ec	1
model_signing._signing.sign_certificate	7
sigstore.dsse	7
sigstore._internal.oidc.oauth	9
model_signing.verifying	17
sigstore.verify.verifier	47
sigstore._internal.sct	26
sigstore.verify.policy	8
model_signing.manifest	3

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	469	65.3%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	249	34.6%
All colors	718	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
55	115	cryptography.x509.extensions.AuthorityKeyIdentifier.__init__	call site: 00115	...model-transparency.tests.fuzzing.fuzz_with_cert_chain._build_hashing_config_from_fdp
41	407	sigstore.oidc.IdentityToken.__init__	call site: 00407	sigstore.oidc.Issuer.identity_token
38	523	model_signing._signing.signing.Verifier.verify	call site: 00523	sigstore.verify.verifier.Verifier.verify_dsse
30	631	sigstore._utils.sha256_digest	call site: 00631	sigstore.verify.verifier._validate_dsse_v001_entry_body
28	486	model_signing._signing.sign_certificate.Verifier.__init__	call site: 00486	model_signing.verifying.Config.verify
26	262	sigstore._internal.tuf.TrustUpdater.get_signing_config_path	call site: 00262	sigstore.models.ClientTrustConfig.from_tuf
24	606	sigstore.verify.policy._SingleX509ExtPolicy.verify	call site: 00606	sigstore.verify.verifier._validate_dsse_v002_entry_body
23	237	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00237	sigstore._internal.tuf.TrustUpdater.get_trusted_root_path
21	449	model_signing.signing.Config.sign	call site: 00449	model_signing._signing.sign_pkcs11.CertSigner._get_verification_material
19	562	sigstore._internal.sct._get_signed_certificate_timestamp	call site: 00562	sigstore._internal.sct._pack_digitally_signed
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
16	589	sigstore._internal.sct._pack_signed_entry	call site: 00589	sigstore.verify.policy.Identity.verify

Runtime coverage analysis

Covered functions

497

Functions that are reachable but not covered

268

Reachable functions

378

Percentage of reachable functions covered

29.1%

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	64
cryptography.hazmat.primitives.asymmetric.rsa	2
cryptography.x509.base	10
cryptography.x509.extensions	9
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._serialization.file_shard	27
model_signing.signing	12
model_signing._signing.sign_certificate	17
model_signing._signing.sign_sigstore	20
sigstore.models	23
sigstore._internal.tuf	20
sigstore._utils	18
sigstore.oidc	26
sigstore.sign	4
model_signing._serialization.serialization	5
model_signing._signing.signing	18
model_signing._signing.sign_ec_key	15
model_signing._signing.sign_sigstore_pb	6
cryptography.hazmat.primitives.asymmetric.ec	1
sigstore.dsse	7
sigstore._internal.oidc.oauth	9
model_signing._signing.sign_pkcs11	19
model_signing.verifying	19
sigstore.verify.verifier	47
sigstore._internal.sct	26
sigstore.verify.policy	8

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	247	76.2%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	77	23.7%
All colors	324	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
38	136	model_signing._signing.signing.Verifier.verify	call site: 00136	sigstore.verify.verifier.Verifier.verify_dsse
30	245	sigstore._utils.sha256_digest	call site: 00245	sigstore.verify.verifier._validate_dsse_v001_entry_body
25	103	...model-transparency.tests.fuzzing.fuzz_simple_sigstore.TestOneInput	call site: 00103	sigstore.models.Bundle.__init__
25	219	sigstore.verify.policy._SingleX509ExtPolicy.verify	call site: 00219	sigstore.verify.verifier._validate_dsse_v002_entry_body
23	65	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00065	sigstore._internal.tuf.TrustUpdater.get_trusted_root_path
19	175	sigstore._internal.sct._get_signed_certificate_timestamp	call site: 00175	sigstore._internal.sct._pack_digitally_signed
16	202	sigstore._internal.sct._pack_signed_entry	call site: 00202	sigstore.verify.policy.Identity.verify
15	1	...model-transparency.tests.fuzzing.fuzz_simple_sigstore.TestOneInput	call site: 00001	sigstore.models.TrustedRoot.from_file
12	90	sigstore._internal.tuf.TrustUpdater.get_signing_config_path	call site: 00090	sigstore.models.ClientTrustConfig.from_tuf
9	43	...model-transparency.tests.fuzzing.fuzz_simple_sigstore.TestOneInput	call site: 00043	sigstore.models.ClientTrustConfig.from_tuf
6	53	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00053	sigstore._internal.tuf._get_dirs
4	280	model_signing.manifest.SerializationType.from_args	call site: 00280	bytes.fromhex

Runtime coverage analysis

Covered functions

494

Functions that are reachable but not covered

162

Reachable functions

194

Percentage of reachable functions covered

16.49%

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	25
sigstore.models	25
model_signing.verifying	17
model_signing._signing.sign_sigstore	10
sigstore._internal.tuf	20
sigstore._utils	18
sigstore.verify.policy	9
model_signing._signing.sign_sigstore_pb	4
model_signing._signing.signing	13
sigstore.verify.verifier	47
sigstore._internal.sct	26
sigstore.dsse	4
cryptography.hazmat.primitives.asymmetric.ec	1
model_signing.manifest	3
model_signing._hashing.memory	1

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	327	74.8%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	110	25.1%
All colors	437	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
41	108	sigstore.oidc.IdentityToken.__init__	call site: 00108	sigstore.oidc.Issuer.identity_token
38	251	model_signing._signing.signing.Verifier.verify	call site: 00251	sigstore.verify.verifier.Verifier.verify_dsse
30	359	sigstore._utils.sha256_digest	call site: 00359	sigstore.verify.verifier._validate_dsse_v001_entry_body
26	63	sigstore._internal.tuf.TrustUpdater.get_signing_config_path	call site: 00063	sigstore.models.ClientTrustConfig.from_tuf
26	178	model_signing.signing.Config.sign	call site: 00178	model_signing._signing.sign_pkcs11.CertSigner._get_verification_material
25	217	...model-transparency.tests.fuzzing.fuzz_sign_verify_with_valid_key.TestOneInput	call site: 00217	sigstore.models.Bundle.__init__
24	334	sigstore.verify.policy._SingleX509ExtPolicy.verify	call site: 00334	sigstore.verify.verifier._validate_dsse_v002_entry_body
23	38	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00038	sigstore._internal.tuf.TrustUpdater.get_trusted_root_path
19	290	sigstore._internal.sct._get_signed_certificate_timestamp	call site: 00290	sigstore._internal.sct._pack_digitally_signed
16	317	sigstore._internal.sct._pack_signed_entry	call site: 00317	sigstore.verify.policy.Identity.verify
6	26	sigstore._internal.tuf.TrustUpdater.__init__	call site: 00026	sigstore._internal.tuf._get_dirs
5	20	...model-transparency.tests.fuzzing.fuzz_sign_verify_with_valid_key.TestOneInput	call site: 00020	sigstore.models.ClientTrustConfig.from_tuf

Runtime coverage analysis

Covered functions

493

Functions that are reachable but not covered

209

Reachable functions

267

Percentage of reachable functions covered

21.72%

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	19
model_signing.signing	11
model_signing._signing.sign_ec_key	18
model_signing._signing.sign_sigstore	20
sigstore.models	23
sigstore._internal.tuf	20
sigstore._utils	18
sigstore.oidc	26
sigstore.sign	4
model_signing._signing.signing	18
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	17
sigstore.verify.verifier	47
sigstore._internal.sct	26
sigstore.verify.policy	8
model_signing.manifest	3

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	13	13	8	242	1	787	418
cryptography.hazmat.primitives.serialization.ssh.SSHCertificateBuilder.sign	cryptography.hazmat.primitives.serialization.ssh	2	['N/A', 'N/A']	5	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']	3	0	12	15	9	35	0	116	82
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
model_signing._signing.pkcs11uri.Pkcs11URI.parse	model_signing._signing.pkcs11uri	2	['N/A', 'N/A']	3	0	5	5	5	17	3	59	40

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

Functions statically reachable by fuzzers

251 / 1388

Cyclomatic complexity statically reachable by fuzzers

913 / 4502

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._signing.sign_ec_key.Signer.__init__', '...model-transparency.tests.fuzzing.fuzz_sign_with_invalid_key.TestOneInput', 'model_signing._serialization.file.Serializer.serialize', 'model_signing._serialization.file_shard.Serializer.serialize', 'model_signing.manifest._FileSerialization.__init__', 'model_signing._signing.sign_sigstore_pb.pae']

/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.oidc.IdentityToken.__init__', 'model_signing._signing.signing.Verifier.verify', 'sigstore._utils.sha256_digest', 'sigstore._internal.tuf.TrustUpdater.get_signing_config_path', '...model-transparency.tests.fuzzing.fuzz_sign_then_mutate_verify_with_valid_key.TestOneInput', 'sigstore.verify.policy._SingleX509ExtPolicy.verify', 'sigstore._internal.tuf.TrustUpdater.__init__', 'model_signing._signing.sign_sigstore_pb.pae', 'sigstore._internal.sct._get_signed_certificate_timestamp', 'sigstore._internal.sct._pack_signed_entry']

/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.oidc.IdentityToken.__init__', 'model_signing._signing.signing.Verifier.verify', 'sigstore._utils.sha256_digest', 'sigstore._internal.tuf.TrustUpdater.get_signing_config_path', '...model-transparency.tests.fuzzing.fuzz_sign_with_valid_key_verify_with_invalid_key.TestOneInput', 'sigstore.verify.policy._SingleX509ExtPolicy.verify', 'sigstore._internal.tuf.TrustUpdater.__init__', 'model_signing._signing.sign_sigstore_pb.pae', 'sigstore._internal.sct._get_signed_certificate_timestamp', 'sigstore._internal.sct._pack_signed_entry']

/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=['cryptography.x509.extensions.AuthorityKeyIdentifier.__init__', 'sigstore.oidc.IdentityToken.__init__', 'model_signing._signing.signing.Verifier.verify', 'sigstore._utils.sha256_digest', 'model_signing._signing.sign_certificate.Verifier.__init__', 'sigstore._internal.tuf.TrustUpdater.get_signing_config_path', 'sigstore.verify.policy._SingleX509ExtPolicy.verify', 'sigstore._internal.tuf.TrustUpdater.__init__', 'model_signing.signing.Config.sign', 'sigstore._internal.sct._get_signed_certificate_timestamp']

/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=['model_signing._signing.signing.Verifier.verify', 'sigstore._utils.sha256_digest', '...model-transparency.tests.fuzzing.fuzz_simple_sigstore.TestOneInput', 'sigstore.verify.policy._SingleX509ExtPolicy.verify', 'sigstore._internal.tuf.TrustUpdater.__init__', 'sigstore._internal.sct._get_signed_certificate_timestamp', 'sigstore._internal.sct._pack_signed_entry', 'sigstore._internal.tuf.TrustUpdater.get_signing_config_path']

/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.oidc.IdentityToken.__init__', 'model_signing._signing.signing.Verifier.verify', 'sigstore._utils.sha256_digest', 'sigstore._internal.tuf.TrustUpdater.get_signing_config_path', 'model_signing.signing.Config.sign', '...model-transparency.tests.fuzzing.fuzz_sign_verify_with_valid_key.TestOneInput', 'sigstore.verify.policy._SingleX509ExtPolicy.verify', 'sigstore._internal.tuf.TrustUpdater.__init__', 'sigstore._internal.sct._get_signed_certificate_timestamp', 'sigstore._internal.sct._pack_signed_entry']

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.isdir	290	131	45.17%	['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_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
cryptography.hazmat.primitives.serialization.ssh._load_ssh_public_identity	56	0	0.0%	[]
cryptography.hazmat.primitives.serialization.ssh.SSHCertificateBuilder.sign	85	0	0.0%	[]
re.match	80	15	18.75%	['fuzz_sign_with_invalid_key']
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_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
typing_extensions.dataclass_transform	1714	560	32.67%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
google.protobuf.json_format.MessageToJson	500	142	28.4%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
resources.append	1640	2	0.121%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
statement.Statement	31	13	41.93%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
OpenSSL.crypto.X509StoreContext	880	267	30.34%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
signer.sign_dsse	89	31	34.83%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key']
asn1crypto.keys.PublicKeyInfo.dump	350	177	50.57%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
asn1crypto.core.OctetString.load	2168	465	21.44%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
hash.finalize	73	27	36.98%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
i.isdigit	141	16	11.34%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
p.is_absolute	46	21	45.65%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
r.pop	109	13	11.92%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_verify_with_valid_key', 'fuzz_with_cert_chain', 'fuzz_sign_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
os.getenv	290	131	45.17%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
val.lower	91	38	41.75%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
signer._signing_cert	89	31	34.83%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
jwt.decode	165	37	22.42%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
pydantic.model_validator	56	28	50.0%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
OpenSSL.crypto.X509StoreContext.get_verified_chain	880	267	30.34%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
verifier.verify_artifact	235	51	21.70%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
response.as_bytes	658	142	21.58%	['fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_sign_then_mutate_verify_with_valid_key']
collections.defaultdict	234	76	32.47%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
url.rstrip	204	60	29.41%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
fields.extend	54	4	7.407%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
sct.log_id.hex	88	21	23.86%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
timestamp.timestamp	46	25	54.34%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
sign.add_argument_group	93	39	41.93%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']
verify.add_subparsers	190	41	21.57%	['fuzz_sign_verify_with_valid_key', 'fuzz_sign_with_valid_key_verify_with_invalid_key', 'fuzz_with_cert_chain', 'fuzz_sign_then_mutate_verify_with_valid_key', 'fuzz_simple_sigstore']

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

Directories in report

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