libksba を Homebrew でインストール

プロジェクトリンク

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コマンドとエイリアス

• ksba-config

プロジェクトの歴史

GnuPG's Libksba page describes the library as a way to hide the many protocol details and dialects of X.509 certificates, CMS data, and related objects behind one C API. The README explains that KSBA is pronounced Kasbah, ships as a standard shared library, and deliberately does not rely on another cryptographic library.

The reference manual edition 1.0.6 was last updated on 2009-01-09 for KSBA 1.0.6, showing that Libksba had already stabilized as a documented component of the GnuPG library set by the late 2000s. GnuPG download metadata lists Libksba 1.8.0 on 2026-05-13.

採用の歴史

Libksba's adoption is mostly through GnuPG and GnuPG-adjacent packaging. The README says GnuPG's dirmngr module makes extensive use of Libksba's OCSP feature, while GnuPG documentation and related manuals identify gpgsm as the X.509/CMS counterpart to gpg for S/MIME workflows.

It appears in Homebrew, Debian, Ubuntu, Fedora, Alpine, Arch, MacPorts, Nix, and openSUSE because GnuPG stacks are base security infrastructure on Unix-like systems. Users rarely install it for its own UI; they inherit it through certificate, S/MIME, and CMS support.

使われ方

Developers use Libksba when they need C-level access to X.509 certificate structures, CMS messages, CRLs, PKCS#10 requests, and related parsing/serialization inside GnuPG-style applications. Packagers see ksba-config as the small build-helper executable attached to the library.

パッケージ好きにとっての重要性

Libksba is significant because it is a quiet security plumbing package: not the cryptographic primitive library, not the mail client, and not the gpg command, but the X.509/CMS parser layer that lets GnuPG's S/MIME side exist as a separately packaged dependency.

タイムライン

• 2001: README copyright range begins with 2001 for g10 Code GmbH.
• 2009-01-09: KSBA Reference Manual edition 1.0.6 last updated for library version 1.0.6.
• 2020-11-19: GnuPG Libksba web page source date.
• 2026-05-13: GnuPG download page lists Libksba 1.8.0.

Related projects

• Related projects include GnuPG, gpgsm, dirmngr, GPGME, Gpg4win, S/MIME, X.509, CMS/PKCS#7, CRLs, OCSP, and PKCS#10 tooling.

ソース

• https://formulae.brew.sh/formula/libksba
• https://github.com/gpg/libksba
• https://www.gnupg.org/documentation/manuals/ksba
• https://www.gnupg.org/download/index.html
• https://www.gnupg.org/software/libksba/index.html