# 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

```sh
sudo av install brew:sha2
```

Additional install commands:

### macOS

- Homebrew (100%):

```sh
brew install sha2
```

  Evidence: local Homebrew formula metadata

### Linux

- dnf (92%):

```sh
sudo dnf install sha2
```

  Evidence: Fedora Rawhide package metadata: sha2 from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/07190dc5ae9f35ae73866675fed6d95fe6e8d9fe22c9d7cdf85862cb2ed24a4c-primary.xml.zst

## Package facts

- **Package key:** brew:sha2
- **Package manager:** Homebrew
- **Version:** 1.0.1
- **Source summary:** Implementation of SHA-256, SHA-384, and SHA-512 hash algorithms
- **Homepage:** <https://aarongifford.com/computers/sha.html>
- **Last updated:** 2026-06-22T08:08:16+02:00
- **Generated:** 2026-08-03T19:37:03+00:00

## Executables

- sha2 (alias)

## Install behavior

- Bottle: not available

## Freshness

- Page generated: 2026-08-03
- Package-manager version: 1.0.1
## 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 Notes

narrow executable package without higher-risk signals.

- **Geiger risk:** green / low
- narrow executable package without higher-risk signals

## Other Package-Manager Records

- dnf - sha2 - 1.0.1-32.fc45: normalized package name match | Fedora Rawhide package metadata: sha2 from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/07190dc5ae9f35ae73866675fed6d95fe6e8d9fe22c9d7cdf85862cb2ed24a4c-primary.xml.zst | SHA Implementation Library | http://www.aarongifford.com/computers/sha.html
- dnf - sha2-devel - 1.0.1-32.fc45: normalized package name match | Fedora Rawhide package metadata: sha2-devel from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/07190dc5ae9f35ae73866675fed6d95fe6e8d9fe22c9d7cdf85862cb2ed24a4c-primary.xml.zst | Development files for sha2 | http://www.aarongifford.com/computers/sha.html


## Combined YAML source

View the package source record on GitHub. [combined/sha2.yml](https://github.com/mxcl/pkgdb/blob/main/combined/sha2.yml)


## Sources

- pkg.so package database
- Geiger risk classifier
- curated package history
- pkgdb category and tag curation
- external package-manager database matches
- cross-ecosystem install command graph