Software health reportschema 0.31.0 · metrics 2.5.0 · 2026-08-08 20:12 UTC

RustCrypto / crypto-bigint

Cryptography-oriented big integer library with constant-time, stack-allocated (no_std-friendly) implementations of modern formulas

RustApache-2.0★ 306 stars⑂ 94 forkssince Sep 2021View on GitHub ↗

KindLibraryhow this is determined

RustCrypto/crypto-bigint holds a health index of 86 out of 100, placing it in the Excellent band. It scores highest on Vitality (92/100) and lowest on Engineering Quality (56/100). It was last updated 3 days ago. A single contributor accounts for most of its recent work.

overall / 100

Excellent

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.

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)

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 72 is calibrated to 86 on the published index scale (record calibration 2026-08-02).

Ownership

Rust CryptoOrganization

2,350 followers40 public repossince Sep 2016

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

Package ecosystems

Registry	Package	Version	Downloads / mo	Versions	Last publish	Tags
crates.io	crypto-bigint	0.7.5	19,693,166	106	47 days ago	crypto bignum precision integer arbitrary algorithms no-std cryptography data-structures mathematics

Metrics by category

Vitality

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

92Excellent · 21% of overall

Development activity

94Exceptional

How it's scored

36/36	Push recency — last push 3 days ago
30.5/36	Commit cadence — 44/52 weeks with commits
18/18	Commit volume — 327 commits in the last year
10/10	OpenSSF Scorecard: Maintained — 30 commit(s) and 6 issue activity found in the last 90 days -- score normalized to 10

Inputs used

commits_last_year	327
human_commit_share	0.8
days_since_last_push	3
active_weeks_last_year	44

Release discipline

88Excellent

How it's scored

16.2/27	Ships releases — 93 version tags (no GitHub releases)
36/36	Release recency — latest release 47 days ago
27/27	Release cadence — a release every ~15.5 days
0/10	OpenSSF Scorecard: Signed-Releases — no data

Inputs used

releases_count	93
latest_release_tag	v0.7.5
releases_from_tags	yes
days_since_latest_release	47
mean_days_between_releases	15.5

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?

67Good · 17% of overall

Popularity & adoption

61Moderate

How it's scored

40.3/60	Stars — 306 stars
16.4/25	Forks — 94 forks
4.7/15	Watchers — 8 watchers

Inputs used

forks	94
stars	306
watchers	8
growth_state	unverified
growth_factor_pct	100
growth_unverified_reason	no_history

Community health

50Moderate

How it's scored

22.5/22.5	README
22.5/22.5	License — recognized license (Apache-2.0)
0/18	CONTRIBUTING guide
0/13.5	Code of conduct
0/7.2	Issue template
0/6.3	PR template

Inputs used

has_readme	yes
has_license	yes
readme_badges	0
has_contributing	no
has_issue_template	no
has_code_of_conduct	no
readme_badge_services	—
has_pull_request_template	no

Ecosystem adoption (downloads)

100Exceptional

How it's scored

80/80	Monthly downloads — 19,693,166 downloads/month across crates
0/20	Registry dependents — not reported by this ecosystem

Inputs used

packages	crypto-bigint
dependents	—
ecosystems	crates
total_downloads	243,218,804
monthly_downloads	19,693,166

Excluded from scoring (no data or not applicable): Registry dependents. Remaining weights renormalized.

Sustainability & Governance

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

72Good · 23% of overall

Maintainer resilience (bus factor)

41Weak

How it's scored

9/54	Bus factor — 1 contributor(s) cover half of all commits
8.2/22.5	Commit distribution — top contributor authored 64% of commits
13.5/13.5	Contributor breadth — 44 contributors
10/10	OpenSSF Scorecard: Contributors — project has 27 contributing companies or organizations

Inputs used

bus_factor	1
contributors_sampled	44
top_contributor_share	0.637

Issue & PR responsiveness

79Good

How it's scored

31.6/42	Issue resolution — 75% of issues closed
26.9/30	PR acceptance — 1,047/1,169 decided PRs merged
13/13	Newcomer PR acceptance — 1/1 first-time contributors' PRs merged in 30d
7.5/15	OpenSSF Scorecard: Code-Review — Found 13/26 approved changesets -- score normalized to 5

Inputs used

merged_prs	1,047
open_issues	36
closed_issues	110
prs_merged_7d	1
prs_decided_7d	2
prs_merged_30d	5
prs_decided_30d	6
issue_closed_ratio	0.753
closed_unmerged_prs	122
first_time_authors_30d	1
first_time_prs_merged_30d	1
first_time_prs_decided_30d	1

Ownership & stewardship

78Good

How it's scored

30/30	Ownership backing — organization-owned
0/20	Verified domain
24.2/25	Owner reach — 2,350 followers of RustCrypto
23.7/25	Track record — 40 public repos, account ~9 yr old

Inputs used

followers	2,350
owner_type	Organization
is_verified	—
owner_login	RustCrypto
public_repos	40
account_age_days	3,608

Package maintenance

100Exceptional

How it's scored

25/25	Published & resolvable — 1 package(s) on crates
35/35	Publish recency — latest publish 47 days ago
20/20	Version history — 106 published versions
20/20	Not deprecated — active, not deprecated or yanked

Inputs used

packages	crypto-bigint
ecosystems	crates
any_deprecated	no
min_days_since_publish	47

Engineering Quality

Are baseline engineering and documentation practices in place?

56Moderate · 19% of overall

Engineering practices

66Good

How it's scored

24/24	CI workflows — 3 workflow(s)
24/24	Tests present
0/16	Linter config
0/9.6	Pre-commit hooks
0/6.4	.editorconfig
18/20	OpenSSF Scorecard: CI-Tests — 29 out of 30 merged PRs checked by a CI test -- score normalized to 9

Inputs used

has_ci	yes
has_tests	yes
has_editorconfig	no
has_linter_config	no
has_precommit_config	no

Documentation

40Weak

How it's scored

30/30	README
0/25	Documentation directory
0/15	Documentation / homepage site
10/10	Repository description
0/10	Topics
0/10	Wiki

Inputs used

topics	—
has_wiki	no
homepage	—
has_readme	yes
has_docs_dir	no
has_description	yes

Security

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

70Good · 16% of overall

Security posture

63Moderate

How it's scored

7.5/7.5	Binary-Artifacts — no binaries found in the repo
0/7.5	Branch-Protection — branch protection not enabled on development/release branches
2.2/2.5	CI-Tests — 29 out of 30 merged PRs checked by a CI test -- score normalized to 9
0/2.5	CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
3.8/7.5	Code-Review — Found 13/26 approved changesets -- score normalized to 5
2.5/2.5	Contributors — project has 27 contributing companies or organizations
10/10	Dangerous-Workflow — no dangerous workflow patterns detected
7.5/7.5	Dependency-Update-Tool — update tool detected
0/5	Fuzzing — project is not fuzzed
2.5/2.5	License — license file detected
7.5/7.5	Maintained — 30 commit(s) and 6 issue activity found in the last 90 days -- score normalized to 10
5/5	Packaging — packaging workflow detected
0/5	Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
0/5	SAST — SAST tool is not run on all commits -- score normalized to 0
5/5	Security-Policy — security policy file detected
0/7.5	Signed-Releases — no data
0/7.5	Token-Permissions — detected GitHub workflow tokens with excessive permissions
7.5/7.5	Vulnerabilities — 0 existing vulnerabilities detected

Inputs used

source	openssf_scorecard
checks_evaluated	17
scorecard_version	v5.5.0
checks_inconclusive	1
scorecard_aggregate	6.3

Excluded from scoring (no data or not applicable): signed_releases. Remaining weights renormalized.

Dependency advisories

100Exceptional

How it's scored

35/35	Direct dependencies free of known advisories — no direct dependency carries a known advisory
0/25	Indirect dependencies free of known advisories — transitive set not separable from development and test dependencies in this scope
0/40	No advisories left outstanding — no advisory carries a publication date

Inputs used

source	osv
advisories	0
affected_packages	0
assessed_packages	127
unassessed_packages	0
affected_by_severity	none
direct_affected_packages	0

Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 127 resolved dependencies against OSV. 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.

62Moderate · 4% of overall

Agent context & guidance

40Weak

How it's scored

0/45	Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15	Machine-readable docs (llms.txt)
40/40	Legible commit history — 80 of 80 human commits state their intent (structured subject or explanatory body)

Inputs used

has_llms_txt	no
legible_history_share	1
agent_instruction_files	—
agent_instruction_max_bytes	—

Verify loop (build / test / typecheck)

64Moderate

How it's scored

12.6/18	One-command bootstrap — Cargo.toml (toolchain convention, no task runner)
22/22	Automated tests
0/11	Lint / format config
11/11	Static type checking — Rust (statically typed)
10/10	Reproducible environment — lockfile
0/10	Demonstrated agent practice — no agent-authored commits among the last 100
8/8	Automated maintenance — 20 of the last 100 commits are automated dependency updates
0/10	OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0

Inputs used

has_nix	no
has_tests	yes
lockfiles	Cargo.lock
has_dockerfile	no
typed_language	yes
bootstrap_files	—
has_devcontainer	no
has_linter_config	no
typecheck_configs	—
agent_commit_share	0
toolchain_manifests	Cargo.toml
dependency_bot_commit_share	0.2

Code legibility for models

100Exceptional

How it's scored

45/45	Type-checkable code — Rust (statically typed)
54.7/55	Manageable file sizes — 1/211 source files over 60KB

Inputs used

primary_language	Rust
largest_source_bytes	66,704
source_files_sampled	211
oversized_source_files	1

Key facts

306GitHub stars

44contributors

327commits, last 12 months

3days since last push

93releases

1bus factor

36open issues

crates.iopackage ecosystems

Data collection warnings

Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token

More detail

Star and fork history 0 ★ / 94 ⇿

0Stars

94Forks

92Releases

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.

Major 0Minor 4Patch 25

Each point covers 5 days.

OpenSSF Scorecard 6.3 / 10

6.3aggregate

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 · 2026-08-08 20:12 UTC

10	Binary-Artifacts	no binaries found in the repo
0	Branch-Protection	branch protection not enabled on development/release branches
9	CI-Tests	29 out of 30 merged PRs checked by a CI test -- score normalized to 9
0	CII-Best-Practices	no effort to earn an OpenSSF best practices badge detected
5	Code-Review	Found 13/26 approved changesets -- score normalized to 5
10	Contributors	project has 27 contributing companies or organizations
10	Dangerous-Workflow	no dangerous workflow patterns detected
10	Dependency-Update-Tool	update tool detected
0	Fuzzing	project is not fuzzed
10	License	license file detected
10	Maintained	30 commit(s) and 6 issue activity found in the last 90 days -- score normalized to 10
10	Packaging	packaging workflow detected
0	Pinned-Dependencies	dependency not pinned by hash detected -- score normalized to 0
0	SAST	SAST tool is not run on all commits -- score normalized to 0
10	Security-Policy	security policy file detected
n/a	Signed-Releases	no releases found
0	Token-Permissions	detected GitHub workflow tokens with excessive permissions
10	Vulnerabilities	0 existing vulnerabilities detected

Direct dependencies 11

Registry	Package	Version constraint	Manifest
crates.io	cpubits	`0.1`	Cargo.toml
crates.io	ctutils	`0.4`	Cargo.toml
crates.io	num-traits	`0.2.19`	Cargo.toml
crates.io	der	`0.8`	Cargo.toml
crates.io	hybrid-array	`0.4.12`	Cargo.toml
crates.io	getrandom	`0.4`	Cargo.toml
crates.io	rand_core	`0.10`	Cargo.toml
crates.io	rlp	`0.6`	Cargo.toml
crates.io	serdect	`0.4`	Cargo.toml
crates.io	subtle	`2.6`	Cargo.toml
crates.io	zeroize	`1`	Cargo.toml

All dependencies 127

Full resolved dependency set from the GitHub dependency graph: 13 direct and 114 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

Registry	Package	Version	Relation
crates.io	cpubits	`0.1.1`	direct
crates.io	ctutils	`0.4.2`	direct
crates.io	der	`0.8.1`	direct
crates.io	getrandom	`0.3.4`	direct
crates.io	getrandom	`0.4.2`	direct
crates.io	hybrid-array	`0.4.12`	direct
crates.io	num-traits	`0.2.19`	direct
crates.io	rand_core	`0.10.1`	direct
crates.io	rand_core	`0.9.5`	direct
crates.io	rlp	`0.6.1`	direct
crates.io	serdect	`0.4.3`	direct
crates.io	subtle	`2.6.1`	direct
crates.io	zeroize	`1.9.0`	direct
crates.io	aho-corasick	`1.1.4`	indirect
crates.io	anes	`0.1.6`	indirect
crates.io	anstyle	`1.0.14`	indirect
crates.io	anyhow	`1.0.103`	indirect
crates.io	autocfg	`1.5.0`	indirect
crates.io	base16ct	`1.0.0`	indirect
crates.io	bit-set	`0.8.0`	indirect
crates.io	bit-vec	`0.8.0`	indirect
crates.io	bitflags	`2.11.1`	indirect
crates.io	bumpalo	`3.20.2`	indirect
crates.io	bytes	`1.11.1`	indirect
crates.io	cast	`0.3.0`	indirect
crates.io	cfg-if	`1.0.4`	indirect
crates.io	chacha20	`0.10.0`	indirect
crates.io	ciborium	`0.2.2`	indirect
crates.io	ciborium-io	`0.2.2`	indirect
crates.io	ciborium-ll	`0.2.2`	indirect
crates.io	clap	`4.6.0`	indirect
crates.io	clap_builder	`4.6.0`	indirect
crates.io	clap_lex	`1.1.0`	indirect
crates.io	cmov	`0.5.4`	indirect
crates.io	cpufeatures	`0.3.0`	indirect
crates.io	criterion	`0.7.0`	indirect
crates.io	criterion-plot	`0.6.0`	indirect
crates.io	crossbeam-deque	`0.8.6`	indirect
crates.io	crossbeam-epoch	`0.9.20`	indirect
crates.io	crossbeam-utils	`0.8.21`	indirect
crates.io	crunchy	`0.2.4`	indirect
crates.io	either	`1.15.0`	indirect
crates.io	equivalent	`1.0.2`	indirect
crates.io	errno	`0.3.14`	indirect
crates.io	fastrand	`2.4.1`	indirect
crates.io	fnv	`1.0.7`	indirect
crates.io	foldhash	`0.1.5`	indirect
crates.io	half	`2.7.1`	indirect
crates.io	hashbrown	`0.15.5`	indirect
crates.io	hashbrown	`0.17.0`	indirect
crates.io	heck	`0.5.0`	indirect
crates.io	hex-literal	`1.1.0`	indirect
crates.io	id-arena	`2.3.0`	indirect
crates.io	indexmap	`2.14.0`	indirect
crates.io	itertools	`0.13.0`	indirect
crates.io	itoa	`1.0.18`	indirect
crates.io	js-sys	`0.3.95`	indirect
crates.io	leb128fmt	`0.1.0`	indirect
crates.io	libc	`0.2.185`	indirect
crates.io	linux-raw-sys	`0.12.1`	indirect
crates.io	log	`0.4.29`	indirect
crates.io	memchr	`2.8.0`	indirect
crates.io	num-bigint	`0.4.6`	indirect
crates.io	num-integer	`0.1.46`	indirect
crates.io	num-modular	`0.6.1`	indirect
crates.io	once_cell	`1.21.4`	indirect
crates.io	oorandom	`11.1.5`	indirect
crates.io	plotters	`0.3.7`	indirect
crates.io	plotters-backend	`0.3.7`	indirect
crates.io	plotters-svg	`0.3.7`	indirect
crates.io	ppv-lite86	`0.2.21`	indirect
crates.io	prettyplease	`0.2.37`	indirect
crates.io	proc-macro2	`1.0.106`	indirect
crates.io	proptest	`1.11.0`	indirect
crates.io	quick-error	`1.2.3`	indirect
crates.io	quote	`1.0.45`	indirect
crates.io	r-efi	`5.3.0`	indirect
crates.io	r-efi	`6.0.0`	indirect
crates.io	rand	`0.9.4`	indirect
crates.io	rand_chacha	`0.9.0`	indirect
crates.io	rand_xorshift	`0.4.0`	indirect
crates.io	rayon	`1.12.0`	indirect
crates.io	rayon-core	`1.13.0`	indirect
crates.io	regex	`1.12.3`	indirect
crates.io	regex-automata	`0.4.14`	indirect
crates.io	regex-syntax	`0.8.10`	indirect
crates.io	rustc-hex	`2.1.0`	indirect
crates.io	rustix	`1.1.4`	indirect
crates.io	rustversion	`1.0.22`	indirect
crates.io	rusty-fork	`0.3.1`	indirect
crates.io	same-file	`1.0.6`	indirect
crates.io	semver	`1.0.28`	indirect
crates.io	serde	`1.0.228`	indirect
crates.io	serde_core	`1.0.228`	indirect
crates.io	serde_derive	`1.0.228`	indirect
crates.io	serde_json	`1.0.149`	indirect
crates.io	syn	`2.0.117`	indirect
crates.io	tempfile	`3.27.0`	indirect
crates.io	tinytemplate	`1.2.1`	indirect
crates.io	typenum	`1.20.0`	indirect
crates.io	unarray	`0.1.4`	indirect
crates.io	unicode-ident	`1.0.24`	indirect
crates.io	unicode-xid	`0.2.6`	indirect
crates.io	wait-timeout	`0.2.1`	indirect
crates.io	walkdir	`2.5.0`	indirect
crates.io	wasip2	`1.0.2+wasi-0.2.9`	indirect
crates.io	wasip3	`0.4.0+wasi-0.3.0-rc-2026-01-06`	indirect
crates.io	wasm-bindgen	`0.2.118`	indirect
crates.io	wasm-bindgen-macro	`0.2.118`	indirect
crates.io	wasm-bindgen-macro-support	`0.2.118`	indirect
crates.io	wasm-bindgen-shared	`0.2.118`	indirect
crates.io	wasm-encoder	`0.244.0`	indirect
crates.io	wasm-metadata	`0.244.0`	indirect
crates.io	wasmparser	`0.244.0`	indirect
crates.io	web-sys	`0.3.95`	indirect
crates.io	winapi-util	`0.1.11`	indirect
crates.io	windows-link	`0.2.1`	indirect
crates.io	windows-sys	`0.61.2`	indirect
crates.io	wit-bindgen	`0.51.0`	indirect
crates.io	wit-bindgen-core	`0.51.0`	indirect
crates.io	wit-bindgen-rust	`0.51.0`	indirect
crates.io	wit-bindgen-rust-macro	`0.51.0`	indirect
crates.io	wit-component	`0.244.0`	indirect
crates.io	wit-parser	`0.244.0`	indirect
crates.io	zerocopy	`0.8.48`	indirect
crates.io	zerocopy-derive	`0.8.48`	indirect
crates.io	zmij	`1.0.21`	indirect

Dependency advisories 0

This repository publishes no package the index resolves, so its own dependency graph was assessed — 127 packages, which also include development and test pins that never ship: 0 carry known advisories, of which 0 are direct.

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

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 v2.5.0, schema v0.31.0 — full methodology · metrics wiki.

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

Software health index

Score profile

Ownership

Package ecosystems

Metrics by category

Key facts

Data collection warnings

More detail

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