macOS
Homebrewverified · 100%
brew install sha2local Homebrew formula metadata
brew / rank 7078
Install sha2 with Homebrew, dnf
Implementation of SHA-256, SHA-384, and SHA-512 hash algorithms. Version 1.0.1 via Homebrew; verified 2026-06-22. Also installable with dnf: sudo dnf install sha2.
install
Additional install commands
Linux
Fedora dnfverified · 92%
sudo dnf install sha2Fedora Rawhide package metadata · sha2 · source: dl.fedoraproject.org
overview
Package summary
Implementation of SHA-256, SHA-384, and SHA-512 hash algorithms
Project links
Commands and aliases
- sha2
history
Project history and usage
SHA-2 is Aaron D. Gifford's BSD-licensed C implementation of the SHA-224, SHA-256, SHA-384, and SHA-512 secure hash algorithms, accompanied by a small `sha2` command-line program.
Project history
Gifford dates the original implementation to a weekend in autumn 2000, specifically 14 October, when the SHA-256, SHA-384, and SHA-512 algorithms were newly described. The author distributes the implementation from his own cryptographic-hashing pages as source archives rather than through a public source-control forge.
Adoption history
The supplied package metadata records packages in Homebrew and DNF-based distributions. Its adoption is therefore best understood as a compact reference implementation and hashing utility preserved by package collections rather than a broad end-user application.
How it is used
The `sha2` executable computes SHA-2 message digests for files or input, while the C sources can also be embedded by developers who need the covered hash functions. It requires no persistent configuration or credentials.
Why package nerds care
The package captures an early open-source implementation of the SHA-2 family close to the algorithms' introduction. It remains interesting as small, auditable C code and as a historical alternative to the hashing commands bundled with larger cryptographic toolkits.
Timeline
- 2000: Aaron D. Gifford implemented the newly described SHA-256, SHA-384, and SHA-512 algorithms in C.
- Later: SHA-224 and SHA-1 support appeared on the author's consolidated BSD-licensed implementation page.
Related projects
- The author's cryptographic code collection also includes SHA-1 and HMAC-SHA1 implementations; modern general-purpose toolkits provide overlapping digest commands and libraries.
Sources
- https://aarongifford.com/computers/
- https://aarongifford.com/computers/sha.html
- source_facts.description
- source_facts.executables
- source_facts.package-manager
security posture
Risk level: green
narrow executable package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- narrow executable package without higher-risk signals
Signals
- metadata:no-higher-risk-signals
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 13 platform targets.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
sha2 | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-08-04
manager version1.0.1
manager updated2026-06-22
local dataok
upstreamnot checked
latest detectednot detected
https://aarongifford.com/computers/sha.html
- infoRelease/tag comparison is only available for GitHub repositories.https://aarongifford.com/computers/sha.htmlnone confidence
install metadata
Package metadata
| Package key | brew:sha2 |
|---|---|
| Version | 1.0.1 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/sha2 |
| Homepage | https://aarongifford.com/computers/sha.html |
| Upstream docs | https://aarongifford.com/computers/sha.html |
| License | BSD-3-Clause |
| Source archive | https://aarongifford.com/computers/sha2-1.0.1.tgz |
| Last updated | 2026-06-22T08:08:16+02:00 |
| Pulse | updated |
| Bottle | available (on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | sha2 |
| Version Scheme | 0 |
| Revision | 0 |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | yes |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
dnf95%
sha2 1.0.1-32.fc45
SHA Implementation Library
http://www.aarongifford.com/computers/sha.html
sudo dnf install sha2- License: LicenseRef-Callaway-BSD
- Category: Unspecified
- Architecture: i686
- Source Package: sha2
- 2 dependencies
- 2 provides
- normalized package name match
- Matched by: Sha2
dnf95%
sha2-devel 1.0.1-32.fc45
Development files for sha2
http://www.aarongifford.com/computers/sha.html
sudo dnf install sha2-devel- License: LicenseRef-Callaway-BSD
- Category: Unspecified
- Architecture: i686
- Source Package: sha2
- 2 dependencies
- 1 provides
- normalized package name match
- Matched by: Sha2
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- package relationship graph
- package version freshness
- package-page enrichment
- pkg.so package database
- pkgdb category and tag curation