# 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/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst ## Package facts - **Package key:** brew:sha2 - **Package manager:** Homebrew - **Package manager page:** - **Version:** 1.0.1 - **Source summary:** Implementation of SHA-256, SHA-384, and SHA-512 hash algorithms - **Homepage:** - **Upstream docs:** - **License:** BSD-3-Clause - **Source archive:** - **Last updated:** 2026-06-22T08:08:16+02:00 - **Generated:** 2026-08-04T22:13:35+00:00 ## Executables - sha2 (cli) - sha2 (alias) ## Install behavior - Post-install hook: not defined - Bottle: available on arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura ## Freshness - Page generated: 2026-08-04 - Package-manager version: 1.0.1 - Package-manager updated: 2026-06-22 - Local data: ok - Upstream repository: https://aarongifford.com/computers/sha.html - info: Release/tag comparison is only available for GitHub repositories. ## 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 - - - 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 ## Source Database Details - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** sha2 - **Version Scheme:** 0 - **Revision:** 0 - **Bottle Stable Root URL:** - **Deprecated:** yes - **Disabled:** no - **Keg Only:** no - **URL Keys:** stable ## 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/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-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/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Development files for sha2 | http://www.aarongifford.com/computers/sha.html ## Related links - [Terminal utility packages](https://pkg.so/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Networking and protocol packages](https://pkg.so/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [Security and crypto packages](https://pkg.so/security-crypto-tools/) - Matched security, identity, cryptography, password, signing, or certificate metadata. - [Web development packages](https://pkg.so/web-dev-tools/) - Matched web development metadata. - [nettle](https://pkg.so/brew/nettle/) - Shares pkgdb curated category or tags: cli, cryptography, hashing, security. - [pdfcrack](https://pkg.so/brew/pdfcrack/) - Shares pkgdb curated category or tags: c, cli, cryptography, security. - [sha3sum](https://pkg.so/brew/sha3sum/) - Shares pkgdb curated category or tags: cli, cryptography, hashing, security. - [b3sum](https://pkg.so/brew/b3sum/) - Shares pkgdb curated category or tags: cli, cryptography, hashing, security. - [ntbtls](https://pkg.so/brew/ntbtls/) - Shares pkgdb curated category or tags: c, cli, cryptography, security. - [sha1dc](https://pkg.so/brew/sha1dc/) - Shares pkgdb curated category or tags: cli, cryptography, hashing, security. - [openssl@3](https://pkg.so/brew/openssl-3/) - Shares pkgdb curated category or tags: cli, cryptography, security. - [gnutls](https://pkg.so/brew/gnutls/) - Shares pkgdb curated category or tags: cli, cryptography, security. - [rhash](https://pkg.so/brew/rhash/) - Security-sensitive metadata or terminology overlaps. Shared terms: 256, 512, cli, cryptography, hash. ## 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 - package-page enrichment - curated package history - package version freshness - pkgdb category and tag curation - package relationship graph - external package-manager database matches - cross-ecosystem install command graph