sha1dc を Homebrew でインストール

プロジェクトリンク

• ホームページ
• パッケージマネージャページ

コマンドとエイリアス

• sha1dcsum
• sha1dcsum_partialcoll

プロジェクトの歴史

Marc Stevens and Dan Shumow published the implementation in 2017 in the context of practical SHA-1 collision attacks. Its detection method builds on Stevens's counter-cryptanalysis research and explicitly recognizes files produced by attacks such as SHAttered; later support also references SHA-mbles.

採用の歴史

The project was designed as a near drop-in replacement for common SHA-1 implementations and sha1sum, lowering the cost of adding collision detection to existing software. The input confirms packaging as the Homebrew formula sha1dc.

使われ方

sha1dcsum hashes files and warns when a full SHA-1 collision attack is detected; sha1dcsum_partialcoll also checks reduced-round collision examples. Developers can integrate the library through its SHA1DC API and use safe-hash mode so colliding inputs receive different defensive hashes.

パッケージ好きにとっての重要性

sha1dc lets package and release engineers continue verifying legacy SHA-1 material while detecting known cryptanalytic collision constructions. It is particularly relevant to archives and software-distribution systems that cannot immediately remove every SHA-1 dependency.

タイムライン

• 2013: Marc Stevens published the counter-cryptanalysis research cited by the project.
• 2017: Project copyright begins and the SHAttered collision became a principal real-world test case.
• Later: The official documentation added reference to detection of attacks derived from SHA-mbles.

Related projects

• The official README relates the tool to ordinary SHA-1 libraries and sha1sum, the SHAttered collision demonstration, SHA-mbles, and Marc Stevens's counter-cryptanalysis research.

ソース

• Official library header: https://github.com/cr-marcstevens/sha1collisiondetection/blob/master/lib/sha1.h
• Official repository and README: https://github.com/cr-marcstevens/sha1collisiondetection
• input.source_facts.package-manager