Public record
Software health reportschema 0.31.0 · metrics 2.10.0 · 2026-08-14 07:44 UTC

aws / s2n-tls

An implementation of the TLS/SSL protocols

C · RustApache-2.0★ 4,750 stars⑂ 790 forkssince Jun 2014View on GitHub ↗

aws/s2n-tls holds a health index of 99 out of 100, placing it in the Exceptional band. It scores highest on Vitality (99/100) and lowest on AI Readiness (74/100). It was last updated today. 8 contributors account for most of its recent work.

99
overall / 100
Exceptional

Software health index

Metrics are grouped into weighted categories on one standardized 1–100 scale. Overall starts as their weighted mean, calibrated against the distribution of the public record so bands carry percentile meaning; when public evidence triggers the High-Risk Jurisdiction Policy, the rating is adjusted and receives an At Risk ceiling of 34.

99
Exceptional93-100The record's top tier (≈ top 5%); essentially all checked criteria met
Excellent80-92Strong across the board; minor gaps
Good65-79Healthy; gaps are limited and manageable
Moderate50-64Acceptable with notable gaps; review recommended
Weak35-49Material weaknesses across several areas
At Risk20-34Significant weaknesses; adoption warrants caution
Critical1-19Severe problems (abandoned, single-maintainer, no hygiene)
VitalityCommunity &AdoptionSustainability &GovernanceEngineeringQualitySecurityAI Readiness

Score profile

Each axis is a category. The shape matters more than the average — a healthy subject fills the whole shape, while a spike-and-crater profile means strength in one dimension is masking risk in another.

The weighted overall 90 is calibrated to 99 on the published index scale (record calibration 2026-08-02).

Ownership

16,394 followers552 public repossince Aug 2012

This repository is backed by an organization — shared, accountable stewardship that can outlive any single maintainer.

Metrics by category

Vitality

Is the project alive — is code being written and are releases shipping?

99Exceptional · 21% of overall
How it's scored
36/36Push recencylast push 0 days ago
34.6/36Commit cadence50/52 weeks with commits
18/18Commit volume380 commits in the last year
10/10OpenSSF Scorecard: Maintained30 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year380
human_commit_share0.92
days_since_last_push0
active_weeks_last_year50

Release discipline

100Exceptional
How it's scored
27/27Ships releases100 releases published
36/36Release recencylatest release 9 days ago
27/27Release cadencea release every ~26.3 days
0/10OpenSSF Scorecard: Signed-Releasesno data
Inputs used
releases_count100
latest_release_tagv1.7.7
releases_from_tagsno
days_since_latest_release9
mean_days_between_releases26.3
Excluded from scoring (no data or not applicable): OpenSSF Scorecard: Signed-Releases. Remaining weights renormalized.

Community & Adoption

Does the project have users, downloads, attention, and a welcoming setup for contributors?

94Exceptional · 17% of overall
How it's scored
59.6/60Stars4,750 stars
24.1/25Forks790 forks
12.2/15Watchers157 watchers
Inputs used
forks790
stars4,750
watchers157
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

92Excellent
How it's scored
22.5/22.5README
22.5/22.5Licenserecognized license (Apache-2.0)
18/18CONTRIBUTING guide
13.5/13.5Code of conduct
0/7.2Issue template
6.3/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges4
has_contributingyes
has_issue_templateno
has_code_of_conductyes
readme_badge_servicesshields.io
has_pull_request_templateyes

Sustainability & Governance

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep?

93Exceptional · 23% of overall
How it's scored
54/54Bus factor8 contributor(s) cover half of all commits
20/22.5Commit distributiontop contributor authored 11% of commits
13.5/13.5Contributor breadth99 contributors
10/10OpenSSF Scorecard: Contributorsproject has 28 contributing companies or organizations
Inputs used
bus_factor8
contributors_sampled99
top_contributor_share0.112
How it's scored
35/42Issue resolution83% of issues closed
24.4/30PR acceptance3,552/4,368 decided PRs merged
4.3/13Newcomer PR acceptance2/6 first-time contributors' PRs merged in 30d
15/15OpenSSF Scorecard: Code-Reviewall changesets reviewed
Inputs used
merged_prs3,552
open_issues271
closed_issues1,348
prs_merged_7d15
prs_decided_7d15
prs_merged_30d37
prs_decided_30d48
issue_closed_ratio0.833
closed_unmerged_prs816
first_time_authors_30d5
first_time_prs_merged_30d2
first_time_prs_decided_30d6
How it's scored
30/30Ownership backingorganization-owned
0/20Verified domainverified-domain status not read for this organization
25/25Owner reach16,394 followers of aws
25/25Track record552 public repos, account ~13 yr old
Inputs used
followers16,394
owner_typeOrganization
is_verified
owner_loginaws
public_repos552
account_age_days5,099
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Engineering Quality

Are baseline engineering and documentation practices in place?

86Excellent · 19% of overall
How it's scored
24/24CI workflows24 workflow(s)
24/24Tests present
16/16Linter configtox.ini
0/9.6Pre-commit hooks
0/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests30 out of 30 merged PRs checked by a CI test -- score normalized to 10
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configyes
has_precommit_configno

Documentation

90Excellent
How it's scored
30/30README
25/25Documentation directory
15/15Documentation / homepage sitehttps://aws.github.io/s2n-tls/usage-guide/
10/10Repository description
10/10Topics8 topics
0/10Wiki
Inputs used
topicstls, ssl, s2n, encryption, c, c99, cryptography, crypto
has_wikino
homepagehttps://aws.github.io/s2n-tls/usage-guide/
docs_sitehttps://aws.github.io/s2n-tls/usage-guide/
has_readmeyes
has_docs_diryes
has_descriptionyes

Security

Are visible security and supply-chain practices strong, without unresolved high-risk jurisdiction exposure?

76Good · 16% of overall
How it's scored
7.5/7.5Binary-Artifactsno binaries found in the repo
6/7.5Branch-Protectionbranch protection is not maximal on development and all release branches
2.5/2.5CI-Tests30 out of 30 merged PRs checked by a CI test -- score normalized to 10
0/2.5CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
7.5/7.5Code-Reviewall changesets reviewed
2.5/2.5Contributorsproject has 28 contributing companies or organizations
10/10Dangerous-Workflowno dangerous workflow patterns detected
7.5/7.5Dependency-Update-Toolupdate tool detected
5/5Fuzzingproject is fuzzed
2.5/2.5Licenselicense file detected
7.5/7.5Maintained30 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
0/5Packagingno data
0/5Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0/5SASTSAST tool is not run on all commits -- score normalized to 0
5/5Security-Policysecurity policy file detected
0/7.5Signed-Releasesno data
0/7.5Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0.8/7.5Vulnerabilities9 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate6.9
Excluded from scoring (no data or not applicable): Packaging, Signed-Releases. Remaining weights renormalized.

Dependency advisories

100Exceptional
How it's scored
35/35Direct dependencies free of known advisoriesno direct dependency carries a known advisory
0/25Indirect dependencies free of known advisoriestransitive set not separable from development and test dependencies in this scope
0/40No advisories left outstandingno advisory carries a publication date
Inputs used
sourceosv
advisories0
affected_packages0
assessed_packages7
unassessed_packages78
affected_by_severitynone
direct_affected_packages0
Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 7 resolved dependencies against OSV. 78 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list. This repository publishes no package the index resolves, so the repository dependency graph was assessed instead. That graph mixes development and test pins with shipped dependencies, so only the declared runtime dependencies are scored; transitive findings are reported as context and excluded from the score. Reachability is not analyzed.

AI Readiness

How well is the repo equipped to be developed and maintained with AI coding agents? Carries a deliberately small weight (4%): agent tooling is a real maintenance signal, but a repository with none can still reach 100/100.

74Good · 4% of overall
How it's scored
0/45Agent instructionsno CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
40/40Legible commit history92 of 92 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url
legible_history_share1
agent_instruction_files
agent_instruction_max_bytes
How it's scored
18/18One-command bootstrapMakefile, bin/Makefile, bindings/rust/extended/Makefile, coverage/Makefile, crypto/Makefile, error/Makefile, lib/Makefile, stuffer/Makefile, tests/LD_PRELOAD/Makefile, tests/Makefile, tests/cbmc/proofs/s2n_add_overflow/Makefile, tests/cbmc/proofs/s2n_align_to/Makefile, tests/cbmc/proofs/s2n_alloc/Makefile, tests/cbmc/proofs/s2n_array_capacity/Makefile, tests/cbmc/proofs/s2n_array_free/Makefile, tests/cbmc/proofs/s2n_array_free_p/Makefile, tests/cbmc/proofs/s2n_array_get/Makefile, tests/cbmc/proofs/s2n_array_init/Makefile, tests/cbmc/proofs/s2n_array_insert/Makefile, tests/cbmc/proofs/s2n_array_insert_and_copy/Makefile, tests/cbmc/proofs/s2n_array_new/Makefile, tests/cbmc/proofs/s2n_array_num_elements/Makefile, tests/cbmc/proofs/s2n_array_pushback/Makefile, tests/cbmc/proofs/s2n_array_remove/Makefile, tests/cbmc/proofs/s2n_blob_char_to_lower/Makefile, tests/cbmc/proofs/s2n_blob_init/Makefile, tests/cbmc/proofs/s2n_blob_is_growable/Makefile, tests/cbmc/proofs/s2n_blob_slice/Makefile, tests/cbmc/proofs/s2n_blob_zero/Makefile, tests/cbmc/proofs/s2n_connection_get_last_message_name/Makefile, tests/cbmc/proofs/s2n_constant_time_copy_or_dont/Makefile, tests/cbmc/proofs/s2n_constant_time_equals/Makefile, tests/cbmc/proofs/s2n_constant_time_pkcs1_unpad_or_dont/Makefile, tests/cbmc/proofs/s2n_dh_compute_shared_secret_as_client/Makefile, tests/cbmc/proofs/s2n_dh_compute_shared_secret_as_server/Makefile, tests/cbmc/proofs/s2n_dh_generate_ephemeral_key/Makefile, tests/cbmc/proofs/s2n_dh_p_g_Ys_to_dh_params/Makefile, tests/cbmc/proofs/s2n_dh_params_check/Makefile, tests/cbmc/proofs/s2n_dh_params_copy/Makefile, tests/cbmc/proofs/s2n_dh_params_free/Makefile, tests/cbmc/proofs/s2n_dh_params_to_p_g_Ys/Makefile, tests/cbmc/proofs/s2n_dup/Makefile, tests/cbmc/proofs/s2n_free/Makefile, tests/cbmc/proofs/s2n_free_object/Makefile, tests/cbmc/proofs/s2n_free_or_wipe/Makefile, tests/cbmc/proofs/s2n_hash_copy/Makefile, tests/cbmc/proofs/s2n_hash_digest/Makefile, tests/cbmc/proofs/s2n_hash_digest_size/Makefile, tests/cbmc/proofs/s2n_hash_free/Makefile, tests/cbmc/proofs/s2n_hash_get_currently_in_hash_total/Makefile, tests/cbmc/proofs/s2n_hash_hmac_alg/Makefile, tests/cbmc/proofs/s2n_hash_init/Makefile, tests/cbmc/proofs/s2n_hash_is_available/Makefile, tests/cbmc/proofs/s2n_hash_is_ready_for_input/Makefile, tests/cbmc/proofs/s2n_hash_new/Makefile, tests/cbmc/proofs/s2n_hash_reset/Makefile, tests/cbmc/proofs/s2n_hash_update/Makefile, tests/cbmc/proofs/s2n_hmac_copy/Makefile, tests/cbmc/proofs/s2n_hmac_digest/Makefile, tests/cbmc/proofs/s2n_hmac_digest_size/Makefile, tests/cbmc/proofs/s2n_hmac_digest_two_compression_rounds/Makefile, tests/cbmc/proofs/s2n_hmac_digest_verify/Makefile, tests/cbmc/proofs/s2n_hmac_free/Makefile, tests/cbmc/proofs/s2n_hmac_hash_alg/Makefile, tests/cbmc/proofs/s2n_hmac_hash_block_size/Makefile, tests/cbmc/proofs/s2n_hmac_init/Makefile, tests/cbmc/proofs/s2n_hmac_new/Makefile, tests/cbmc/proofs/s2n_hmac_reset/Makefile, tests/cbmc/proofs/s2n_hmac_restore_evp_hash_state/Makefile, tests/cbmc/proofs/s2n_hmac_save_evp_hash_state/Makefile, tests/cbmc/proofs/s2n_hmac_update/Makefile, tests/cbmc/proofs/s2n_hmac_xor_pad_size/Makefile, tests/cbmc/proofs/s2n_is_base64_char/Makefile, tests/cbmc/proofs/s2n_is_hello_retry_handshake/Makefile, tests/cbmc/proofs/s2n_is_hello_retry_message/Makefile, tests/cbmc/proofs/s2n_mem_cleanup/Makefile, tests/cbmc/proofs/s2n_mem_init/Makefile, tests/cbmc/proofs/s2n_mul_overflow_harness/Makefile, tests/cbmc/proofs/s2n_pkcs3_to_dh_params/Makefile, tests/cbmc/proofs/s2n_pkcs3_to_dh_params_openssl_1_1_0/Makefile, tests/cbmc/proofs/s2n_realloc/Makefile, tests/cbmc/proofs/s2n_socket_quickack/Makefile, tests/cbmc/proofs/s2n_socket_read/Makefile, tests/cbmc/proofs/s2n_socket_read_restore/Makefile, tests/cbmc/proofs/s2n_socket_read_snapshot/Makefile, tests/cbmc/proofs/s2n_socket_was_corked/Makefile, tests/cbmc/proofs/s2n_socket_write/Makefile, tests/cbmc/proofs/s2n_socket_write_cork/Makefile, tests/cbmc/proofs/s2n_socket_write_restore/Makefile, tests/cbmc/proofs/s2n_socket_write_snapshot/Makefile, tests/cbmc/proofs/s2n_socket_write_uncork/Makefile, tests/cbmc/proofs/s2n_stuffer_alloc/Makefile, tests/cbmc/proofs/s2n_stuffer_alloc_ro_from_string/Makefile, tests/cbmc/proofs/s2n_stuffer_certificate_from_pem/Makefile, tests/cbmc/proofs/s2n_stuffer_copy/Makefile, tests/cbmc/proofs/s2n_stuffer_dhparams_from_pem/Makefile, tests/cbmc/proofs/s2n_stuffer_erase_and_read/Makefile, tests/cbmc/proofs/s2n_stuffer_erase_and_read_bytes/Makefile, tests/cbmc/proofs/s2n_stuffer_extract_blob/Makefile, tests/cbmc/proofs/s2n_stuffer_free/Makefile, tests/cbmc/proofs/s2n_stuffer_get_vector_size/Makefile, tests/cbmc/proofs/s2n_stuffer_growable_alloc/Makefile, tests/cbmc/proofs/s2n_stuffer_init/Makefile, tests/cbmc/proofs/s2n_stuffer_is_consumed/Makefile, tests/cbmc/proofs/s2n_stuffer_peek_char/Makefile, tests/cbmc/proofs/s2n_stuffer_peek_check_for_str/Makefile, tests/cbmc/proofs/s2n_stuffer_printf/Makefile, tests/cbmc/proofs/s2n_stuffer_private_key_from_pem/Makefile, tests/cbmc/proofs/s2n_stuffer_raw_read/Makefile, tests/cbmc/proofs/s2n_stuffer_raw_write/Makefile, tests/cbmc/proofs/s2n_stuffer_read/Makefile, tests/cbmc/proofs/s2n_stuffer_read_base64/Makefile, tests/cbmc/proofs/s2n_stuffer_read_bytes/Makefile, tests/cbmc/proofs/s2n_stuffer_read_expected_str/Makefile, tests/cbmc/proofs/s2n_stuffer_read_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_read_line/Makefile, tests/cbmc/proofs/s2n_stuffer_read_token/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint16/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint16_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint24/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint32/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint64/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint8/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint8_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_reread/Makefile, tests/cbmc/proofs/s2n_stuffer_reserve/Makefile, tests/cbmc/proofs/s2n_stuffer_reserve_space/Makefile, tests/cbmc/proofs/s2n_stuffer_reserve_uint16/Makefile, tests/cbmc/proofs/s2n_stuffer_reserve_uint24/Makefile, tests/cbmc/proofs/s2n_stuffer_resize/Makefile, tests/cbmc/proofs/s2n_stuffer_resize_if_empty/Makefile, tests/cbmc/proofs/s2n_stuffer_rewind_read/Makefile, tests/cbmc/proofs/s2n_stuffer_rewrite/Makefile, tests/cbmc/proofs/s2n_stuffer_shift/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_expected_char/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_read/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_read_until/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_to_char/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_whitespace/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_write/Makefile, tests/cbmc/proofs/s2n_stuffer_wipe/Makefile, tests/cbmc/proofs/s2n_stuffer_wipe_n/Makefile, tests/cbmc/proofs/s2n_stuffer_write/Makefile, tests/cbmc/proofs/s2n_stuffer_write_base64/Makefile, tests/cbmc/proofs/s2n_stuffer_write_bytes/Makefile, tests/cbmc/proofs/s2n_stuffer_write_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_write_network_order/Makefile, tests/cbmc/proofs/s2n_stuffer_write_reservation/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint16/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint16_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint24/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint32/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint64/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint8/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint8_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_write_vector_size/Makefile, tests/cbmc/proofs/s2n_stuffer_writev_bytes/Makefile, tests/cbmc/proofs/s2n_sub_overflow/Makefile, tests/ctverif/Makefile, tests/integrationv2/Makefile, tests/saw/Makefile, tests/saw/bitcode/Makefile, tests/saw/spec/extras/HMAC/Makefile, tests/sidetrail/Makefile, tests/sidetrail/working/s2n-cbc/Makefile, tests/sidetrail/working/s2n-record-read-aead/Makefile, tests/sidetrail/working/s2n-record-read-cbc-negative-test/Makefile, tests/sidetrail/working/s2n-record-read-cbc/Makefile, tests/sidetrail/working/s2n-record-read-composite/Makefile, tests/sidetrail/working/s2n-record-read-stream/Makefile, tests/testlib/Makefile, tests/unit/Makefile, tests/viz/Makefile, tls/Makefile, tls/extensions/Makefile, utils/Makefile
22/22Automated tests
11/11Lint / format configtox.ini
11/11Static type checkingC (statically typed)
10/10Reproducible environmentNix
0/10Demonstrated agent practiceno agent-authored commits among the last 100
8/8Automated maintenance8 of the last 100 commits are automated dependency updates
0/10OpenSSF Scorecard: Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
Inputs used
has_nixyes
has_testsyes
lockfiles
has_dockerfileno
typed_languageyes
bootstrap_filesMakefile, bin/Makefile, bindings/rust/extended/Makefile, coverage/Makefile, crypto/Makefile, error/Makefile, lib/Makefile, stuffer/Makefile, tests/LD_PRELOAD/Makefile, tests/Makefile, tests/cbmc/proofs/s2n_add_overflow/Makefile, tests/cbmc/proofs/s2n_align_to/Makefile, tests/cbmc/proofs/s2n_alloc/Makefile, tests/cbmc/proofs/s2n_array_capacity/Makefile, tests/cbmc/proofs/s2n_array_free/Makefile, tests/cbmc/proofs/s2n_array_free_p/Makefile, tests/cbmc/proofs/s2n_array_get/Makefile, tests/cbmc/proofs/s2n_array_init/Makefile, tests/cbmc/proofs/s2n_array_insert/Makefile, tests/cbmc/proofs/s2n_array_insert_and_copy/Makefile, tests/cbmc/proofs/s2n_array_new/Makefile, tests/cbmc/proofs/s2n_array_num_elements/Makefile, tests/cbmc/proofs/s2n_array_pushback/Makefile, tests/cbmc/proofs/s2n_array_remove/Makefile, tests/cbmc/proofs/s2n_blob_char_to_lower/Makefile, tests/cbmc/proofs/s2n_blob_init/Makefile, tests/cbmc/proofs/s2n_blob_is_growable/Makefile, tests/cbmc/proofs/s2n_blob_slice/Makefile, tests/cbmc/proofs/s2n_blob_zero/Makefile, tests/cbmc/proofs/s2n_connection_get_last_message_name/Makefile, tests/cbmc/proofs/s2n_constant_time_copy_or_dont/Makefile, tests/cbmc/proofs/s2n_constant_time_equals/Makefile, tests/cbmc/proofs/s2n_constant_time_pkcs1_unpad_or_dont/Makefile, tests/cbmc/proofs/s2n_dh_compute_shared_secret_as_client/Makefile, tests/cbmc/proofs/s2n_dh_compute_shared_secret_as_server/Makefile, tests/cbmc/proofs/s2n_dh_generate_ephemeral_key/Makefile, tests/cbmc/proofs/s2n_dh_p_g_Ys_to_dh_params/Makefile, tests/cbmc/proofs/s2n_dh_params_check/Makefile, tests/cbmc/proofs/s2n_dh_params_copy/Makefile, tests/cbmc/proofs/s2n_dh_params_free/Makefile, tests/cbmc/proofs/s2n_dh_params_to_p_g_Ys/Makefile, tests/cbmc/proofs/s2n_dup/Makefile, tests/cbmc/proofs/s2n_free/Makefile, tests/cbmc/proofs/s2n_free_object/Makefile, tests/cbmc/proofs/s2n_free_or_wipe/Makefile, tests/cbmc/proofs/s2n_hash_copy/Makefile, tests/cbmc/proofs/s2n_hash_digest/Makefile, tests/cbmc/proofs/s2n_hash_digest_size/Makefile, tests/cbmc/proofs/s2n_hash_free/Makefile, tests/cbmc/proofs/s2n_hash_get_currently_in_hash_total/Makefile, tests/cbmc/proofs/s2n_hash_hmac_alg/Makefile, tests/cbmc/proofs/s2n_hash_init/Makefile, tests/cbmc/proofs/s2n_hash_is_available/Makefile, tests/cbmc/proofs/s2n_hash_is_ready_for_input/Makefile, tests/cbmc/proofs/s2n_hash_new/Makefile, tests/cbmc/proofs/s2n_hash_reset/Makefile, tests/cbmc/proofs/s2n_hash_update/Makefile, tests/cbmc/proofs/s2n_hmac_copy/Makefile, tests/cbmc/proofs/s2n_hmac_digest/Makefile, tests/cbmc/proofs/s2n_hmac_digest_size/Makefile, tests/cbmc/proofs/s2n_hmac_digest_two_compression_rounds/Makefile, tests/cbmc/proofs/s2n_hmac_digest_verify/Makefile, tests/cbmc/proofs/s2n_hmac_free/Makefile, tests/cbmc/proofs/s2n_hmac_hash_alg/Makefile, tests/cbmc/proofs/s2n_hmac_hash_block_size/Makefile, tests/cbmc/proofs/s2n_hmac_init/Makefile, tests/cbmc/proofs/s2n_hmac_new/Makefile, tests/cbmc/proofs/s2n_hmac_reset/Makefile, tests/cbmc/proofs/s2n_hmac_restore_evp_hash_state/Makefile, tests/cbmc/proofs/s2n_hmac_save_evp_hash_state/Makefile, tests/cbmc/proofs/s2n_hmac_update/Makefile, tests/cbmc/proofs/s2n_hmac_xor_pad_size/Makefile, tests/cbmc/proofs/s2n_is_base64_char/Makefile, tests/cbmc/proofs/s2n_is_hello_retry_handshake/Makefile, tests/cbmc/proofs/s2n_is_hello_retry_message/Makefile, tests/cbmc/proofs/s2n_mem_cleanup/Makefile, tests/cbmc/proofs/s2n_mem_init/Makefile, tests/cbmc/proofs/s2n_mul_overflow_harness/Makefile, tests/cbmc/proofs/s2n_pkcs3_to_dh_params/Makefile, tests/cbmc/proofs/s2n_pkcs3_to_dh_params_openssl_1_1_0/Makefile, tests/cbmc/proofs/s2n_realloc/Makefile, tests/cbmc/proofs/s2n_socket_quickack/Makefile, tests/cbmc/proofs/s2n_socket_read/Makefile, tests/cbmc/proofs/s2n_socket_read_restore/Makefile, tests/cbmc/proofs/s2n_socket_read_snapshot/Makefile, tests/cbmc/proofs/s2n_socket_was_corked/Makefile, tests/cbmc/proofs/s2n_socket_write/Makefile, tests/cbmc/proofs/s2n_socket_write_cork/Makefile, tests/cbmc/proofs/s2n_socket_write_restore/Makefile, tests/cbmc/proofs/s2n_socket_write_snapshot/Makefile, tests/cbmc/proofs/s2n_socket_write_uncork/Makefile, tests/cbmc/proofs/s2n_stuffer_alloc/Makefile, tests/cbmc/proofs/s2n_stuffer_alloc_ro_from_string/Makefile, tests/cbmc/proofs/s2n_stuffer_certificate_from_pem/Makefile, tests/cbmc/proofs/s2n_stuffer_copy/Makefile, tests/cbmc/proofs/s2n_stuffer_dhparams_from_pem/Makefile, tests/cbmc/proofs/s2n_stuffer_erase_and_read/Makefile, tests/cbmc/proofs/s2n_stuffer_erase_and_read_bytes/Makefile, tests/cbmc/proofs/s2n_stuffer_extract_blob/Makefile, tests/cbmc/proofs/s2n_stuffer_free/Makefile, tests/cbmc/proofs/s2n_stuffer_get_vector_size/Makefile, tests/cbmc/proofs/s2n_stuffer_growable_alloc/Makefile, tests/cbmc/proofs/s2n_stuffer_init/Makefile, tests/cbmc/proofs/s2n_stuffer_is_consumed/Makefile, tests/cbmc/proofs/s2n_stuffer_peek_char/Makefile, tests/cbmc/proofs/s2n_stuffer_peek_check_for_str/Makefile, tests/cbmc/proofs/s2n_stuffer_printf/Makefile, tests/cbmc/proofs/s2n_stuffer_private_key_from_pem/Makefile, tests/cbmc/proofs/s2n_stuffer_raw_read/Makefile, tests/cbmc/proofs/s2n_stuffer_raw_write/Makefile, tests/cbmc/proofs/s2n_stuffer_read/Makefile, tests/cbmc/proofs/s2n_stuffer_read_base64/Makefile, tests/cbmc/proofs/s2n_stuffer_read_bytes/Makefile, tests/cbmc/proofs/s2n_stuffer_read_expected_str/Makefile, tests/cbmc/proofs/s2n_stuffer_read_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_read_line/Makefile, tests/cbmc/proofs/s2n_stuffer_read_token/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint16/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint16_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint24/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint32/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint64/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint8/Makefile, tests/cbmc/proofs/s2n_stuffer_read_uint8_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_reread/Makefile, tests/cbmc/proofs/s2n_stuffer_reserve/Makefile, tests/cbmc/proofs/s2n_stuffer_reserve_space/Makefile, tests/cbmc/proofs/s2n_stuffer_reserve_uint16/Makefile, tests/cbmc/proofs/s2n_stuffer_reserve_uint24/Makefile, tests/cbmc/proofs/s2n_stuffer_resize/Makefile, tests/cbmc/proofs/s2n_stuffer_resize_if_empty/Makefile, tests/cbmc/proofs/s2n_stuffer_rewind_read/Makefile, tests/cbmc/proofs/s2n_stuffer_rewrite/Makefile, tests/cbmc/proofs/s2n_stuffer_shift/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_expected_char/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_read/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_read_until/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_to_char/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_whitespace/Makefile, tests/cbmc/proofs/s2n_stuffer_skip_write/Makefile, tests/cbmc/proofs/s2n_stuffer_wipe/Makefile, tests/cbmc/proofs/s2n_stuffer_wipe_n/Makefile, tests/cbmc/proofs/s2n_stuffer_write/Makefile, tests/cbmc/proofs/s2n_stuffer_write_base64/Makefile, tests/cbmc/proofs/s2n_stuffer_write_bytes/Makefile, tests/cbmc/proofs/s2n_stuffer_write_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_write_network_order/Makefile, tests/cbmc/proofs/s2n_stuffer_write_reservation/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint16/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint16_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint24/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint32/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint64/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint8/Makefile, tests/cbmc/proofs/s2n_stuffer_write_uint8_hex/Makefile, tests/cbmc/proofs/s2n_stuffer_write_vector_size/Makefile, tests/cbmc/proofs/s2n_stuffer_writev_bytes/Makefile, tests/cbmc/proofs/s2n_sub_overflow/Makefile, tests/ctverif/Makefile, tests/integrationv2/Makefile, tests/saw/Makefile, tests/saw/bitcode/Makefile, tests/saw/spec/extras/HMAC/Makefile, tests/sidetrail/Makefile, tests/sidetrail/working/s2n-cbc/Makefile, tests/sidetrail/working/s2n-record-read-aead/Makefile, tests/sidetrail/working/s2n-record-read-cbc-negative-test/Makefile, tests/sidetrail/working/s2n-record-read-cbc/Makefile, tests/sidetrail/working/s2n-record-read-composite/Makefile, tests/sidetrail/working/s2n-record-read-stream/Makefile, tests/testlib/Makefile, tests/unit/Makefile, tests/viz/Makefile, tls/Makefile, tls/extensions/Makefile, utils/Makefile
has_devcontainerno
has_linter_configyes
typecheck_configs
agent_commit_share0
toolchain_manifestsbindings/rust-examples/Cargo.toml, bindings/rust-examples/client-hello-config-resolution/Cargo.toml, bindings/rust-examples/hyper-server-client/Cargo.toml, bindings/rust-examples/key-logging/Cargo.toml, bindings/rust-examples/tokio-server-client/Cargo.toml, bindings/rust/aws-kms-tls-auth/Cargo.toml, bindings/rust/aws-kms-tls-auth/fuzz/Cargo.toml, bindings/rust/extended/Cargo.toml, bindings/rust/extended/generate/Cargo.toml, bindings/rust/extended/s2n-tls-sys/Cargo.toml, bindings/rust/extended/s2n-tls-tokio/Cargo.toml, bindings/rust/extended/s2n-tls/Cargo.toml, bindings/rust/standard/Cargo.toml, bindings/rust/standard/benchmarks/Cargo.toml, bindings/rust/standard/integration/Cargo.toml, bindings/rust/standard/s2n-tls-hyper/Cargo.toml, bindings/rust/standard/s2n-tls-metrics-schema/Cargo.toml, bindings/rust/standard/s2n-tls-metrics-subscriber/Cargo.toml, bindings/rust/standard/s2n-tls-metrics-subscriber/fuzz/Cargo.toml, bindings/rust/standard/s2n-tls-sys-internal/Cargo.toml, bindings/rust/standard/tls-harness/Cargo.toml, tests/pcap/Cargo.toml, tests/regression/Cargo.toml
dependency_bot_commit_share0.08
How it's scored
45/45Type-checkable codeC (statically typed)
53.8/55Manageable file sizes24/1,139 source files over 60KB
Inputs used
primary_languageC
largest_source_bytes190,712
source_files_sampled1,139
oversized_source_files24
How it's scored
0/40API schema (OpenAPI/GraphQL/proto)not applicable to this kind of software
0/20MCP servernot applicable to this kind of software
40/40Runnable examplesexamples
Inputs used
example_dirsexamples
has_mcp_signalno
api_schema_files
interfaces_expected_of
Excluded from scoring (no data or not applicable): API schema (OpenAPI/GraphQL/proto), MCP server. Remaining weights renormalized.

Key facts

4,750GitHub stars
99contributors
380commits, last 12 months
0days since last push
100releases
8bus factor
271open issues
package ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
  • First-time contributor figures cover 12 of 18 authors (cap 12)

More detail

Star and fork history 0 ★ / 790 ⇿
0Stars
790Forks
99Releases

When each star and fork was added, collected from GitHub and bucketed by day. Cumulative growth sits directly above the daily additions it is made of, so the two read against each other: steady organic accretion looks nothing like an abrupt, short-lived burst. Where that difference is measurable, it is reported as growth authenticity.

0200400600800770962015-062021-012026-07
Major 0Minor 4Patch 95

Each point covers 11 days.

OpenSSF Scorecard 6.9 / 10
6.9aggregate

Independent, tool-agnostic security assessment from the open-source OpenSSF Scorecard. Each check rewards a security practice, not a specific vendor's tool. Checks Scorecard could not determine are marked n/a and excluded from the security score (never counted as zero).Scorecard v5.5.0 · 2026-08-14 07:43 UTC

10Binary-Artifactsno binaries found in the repo
8Branch-Protectionbranch protection is not maximal on development and all release branches
10CI-Tests30 out of 30 merged PRs checked by a CI test -- score normalized to 10
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
10Code-Reviewall changesets reviewed
10Contributorsproject has 28 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
10Fuzzingproject is fuzzed
10Licenselicense file detected
10Maintained30 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10
n/aPackagingpackaging workflow not detected
0Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0SASTSAST tool is not run on all commits -- score normalized to 0
10Security-Policysecurity policy file detected
n/aSigned-Releasesno releases found
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
1Vulnerabilities9 existing vulnerabilities detected
All dependencies 85

Full resolved dependency set from the GitHub dependency graph: 0 direct and 85 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
crates.ioanyhowindirect
crates.ioarc-swapindirect
crates.ioaws-configindirect
crates.ioaws-lc-rsindirect
crates.ioaws-lc-sysindirect
crates.ioaws-sdk-kmsindirect
crates.ioaws-smithy-mocksindirect
crates.iobindgenindirect
crates.iobrass-aphid-wire-decryptionindirect
crates.iobrass-aphid-wire-messagesindirect
crates.iobyteorderindirect
crates.iobytesindirect
crates.ioccindirect
crates.iocheckersindirect
crates.iociboriumindirect
crates.ioclapindirect
crates.ioconst-oidindirect
crates.iocrabgrindindirect
crates.iocriterionindirect
crates.iodhatindirect
crates.ioenv_loggerindirect
crates.ioerrnoindirect
crates.ioforeign-typesindirect
crates.ioforeign-types-sharedindirect
crates.iofutures-testindirect
crates.ioglobindirect
crates.iohexindirect
crates.iohome0.5.5indirect
crates.iohome0.5.9indirect
crates.iohttpindirect
crates.iohttp-body-utilindirect
crates.iohyperindirect
crates.iohyper-utilindirect
crates.iolibcindirect
crates.iolibfuzzer-sysindirect
crates.iologindirect
crates.iometrique-writerindirect
crates.iometrique-writer-format-emfindirect
crates.iomokaindirect
crates.ioopensslindirect
crates.ioopenssl-srcindirect
crates.ioopenssl-sysindirect
crates.iopin-projectindirect
crates.iopin-project-liteindirect
crates.iorandindirect
crates.iorcgenindirect
crates.ioregexindirect
crates.ioreqwestindirect
crates.iortsharkindirect
crates.iorustc_versionindirect
crates.iorustlsindirect
crates.iorustls-pemfileindirect
crates.ios2n-tlsindirect
crates.ios2n-tls0.3.42indirect
crates.ios2n-tls-metrics-schemaindirect
crates.ios2n-tls-metrics-subscriberindirect
crates.ios2n-tls-sysindirect
crates.ios2n-tls-sys0.3.42indirect
crates.ios2n-tls-tokioindirect
crates.iosemverindirect
crates.ioserdeindirect
crates.ioserde_jsonindirect
crates.ioserde_withindirect
crates.iostatic_assertionsindirect
crates.iostrumindirect
crates.iotabledindirect
crates.iotemp-envindirect
crates.iotest-logindirect
crates.iotimeindirect
crates.iotokioindirect
crates.iotokio-opensslindirect
crates.iotower-serviceindirect
crates.iotracingindirect
crates.iotracing-subscriberindirect
crates.iozerocopyindirect
crates.iozeroizeindirect
PyPIagithub2.2.2indirect
PyPIboto31.12.29indirect
PyPIcodemodindirect
PyPIcryptographyindirect
PyPIpytestindirect
PyPIpytest-rerunfailures15.1indirect
PyPIpytest-xdistindirect
PyPIruffindirect
PyPIsslyzeindirect
Dependency advisories 0

This repository publishes no package the index resolves, so its own dependency graph was assessed — 7 packages, which also include development and test pins that never ship: 0 carry known advisories, of which 0 are direct. 78 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list.

No known advisories affect the assessed dependencies.

An advisory means the version recorded in the dependency graph falls inside an advisory’s affected range. Reachability is not analysed, and the graph includes development and test pins — a finding may concern tooling rather than shipped software.

Raw JSON report machine-readable

Feedback

Spotted something off in this report, or have thoughts to share? Wrong measurements, missed tooling, ideas, questions — anything is welcome. Every message is read and gets a response.

The message is kept through sign-in.

Scores are signals, not warranties. They reflect publicly visible practices on GitHub — not a code audit, and not a security guarantee.

Missing data is excluded and weights renormalized, never scored as zero. Methodology is versioned and open: metrics v2.10.0, schema v0.31.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statistics.