Automic VaultAutomic Vault

brew

libidn2 を Homebrew, apk, dnf, MacPorts, Nix, pacman, apt, zypper でインストール

libidn2 のインストール経路、実行ファイル、メタデータ、AI エージェント向けセキュリティノートを確認します。

インストールコマンドセキュリティノート

インストール

追加のインストールコマンド

macOS

Homebrew確認済み · 100%
brew install libidn2

local Homebrew formula metadata

MacPorts確認済み · 94%
sudo port install libidn2

MacPorts ports tree · mail/libidn2/Portfile · ソース: api.github.com

Linux

Alpine Linux apk確認済み · 92%
sudo apk add libidn2

Alpine Linux edge package indexes · libidn2 · ソース: dl-cdn.alpinelinux.org

Fedora dnf確認済み · 92%
sudo dnf install libidn2

Fedora Rawhide package metadata · libidn2 · ソース: dl.fedoraproject.org

Nix確認済み · 92%
nix profile install nixpkgs#libidn2

nixpkgs package indexes · libidn2 · ソース: raw.githubusercontent.com

Arch Linux pacman確認済み · 92%
sudo pacman -S libidn2

Arch Linux sync databases · libidn2 · ソース: geo.mirror.pkgbuild.com

Debian apt確認済み · 92%
sudo apt install idn2

Debian stable package indexes · idn2 · ソース: deb.debian.org

openSUSE zypper確認済み · 92%
sudo zypper install libidn2-0

openSUSE Tumbleweed package metadata · libidn2-0 · ソース: download.opensuse.org

概要

パッケージ概要

International domain name library (IDNA2008, Punycode and TR46)

コマンドとエイリアス

  • idn2

履歴

プロジェクトの歴史と使われ方

GNU Libidn2 is the GNU successor to Libidn for IDNA2008 and Unicode TR46 internationalized-domain-name processing.

プロジェクトの歴史

The IETF IDNA2008 RFC series replaced the earlier IDNA2003 model, describing a revised protocol and definitions for internationalized domain names. Libidn2 was created to implement that newer standards family while retaining package-level continuity for GNU users.

The Libidn2 NEWS file records an initial 0.0 alpha release on 2011-03-09 for public API review, with IDNA2008 lookup mostly implemented. Release 0.2 on 2011-03-30 added the idn2 command-line tool and made lookup/register functions operational.

Release 0.12 on 2016-12-26 added TR46/UTS #46 support to the API and idn2 utility. Release 2.0.0 on 2017-03-29 changed the version numbering scheme and added to-ASCII and to-Unicode conversion functions corresponding to Libidn functions. Release 2.0.5 on 2018-05-18 switched the default library behavior to IDNA2008 as amended by non-transitional TR46.

採用の歴史

The GNU Libidn page explicitly calls Libidn2 the successor of GNU Libidn and notes that it provides IDNA2008, TR46, and a compatibility layer for GNU Libidn. That made it the practical migration path for distributions and network applications moving away from IDNA2003 behavior.

Libidn2 is package-visible because applications often need a shared, audited implementation of Unicode domain-name conversion rather than hand-rolling security-sensitive Punycode and normalization behavior.

使われ方

Users call idn2 for command-line conversion and debugging, while applications link the library for IDNA lookup and registration conversions. The manual emphasizes correct locale and UTF-8 handling because feeding bytes in the wrong character set can produce errors or wrong output.

パッケージ好きにとっての重要性

Libidn2 is where DNS, Unicode versioning, security-sensitive string handling, and compatibility policy meet. Packagers care about it because changing from libidn to libidn2 can alter IDNA behavior, but staying on IDNA2003 can be wrong for software that expects IDNA2008/TR46.

It is also a good example of a successor package that is not just a new ABI: it represents a standards transition and a different view of what domain names should accept.

タイムライン

  • 2010: RFC 5890 and related RFCs documented the IDNA2008 revision that superseded IDNA2003.
  • 2011: Libidn2 0.0 alpha released for public API review.
  • 2011: Libidn2 0.2 added the idn2 command-line tool.
  • 2016: Libidn2 0.12 added TR46/UTS #46 support.
  • 2017: Libidn2 2.0.0 changed version numbering and added Libidn-corresponding conversion APIs.
  • 2018: Libidn2 2.0.5 made IDNA2008 plus non-transitional TR46 the default behavior.

Related projects

  • GNU Libidn is the predecessor and compatibility target.
  • GNU libunistring is related through Unicode string support used by Libidn2 builds.
  • RFC 5890, RFC 5891, and Unicode UTS #46 define the standards context around Libidn2.

セキュリティ状態

リスクレベル: グリーン

library-like package without higher-risk signals.

リスク分類器

リスク グリーン · 信頼度 低 · appliance

理由

  • library-like package without higher-risk signals

信号

  • metadata:library-like

インストール挙動

  • formula メタデータに Homebrew post-install フックは記録されていません。
  • Homebrew bottle メタデータは 8 個のプラットフォームターゲットで利用できます。
  • 2 件の実行時依存関係とともにインストールされます。
  • ビルドメタデータには 1 件のビルド依存関係があります。

推奨レビュー

エージェントに無人実行させる前に、このツールが平文の認証情報を読むか、リモート状態を書き込むか、成果物を公開するか、プラグインを起動するかを確認してください。

実行可能ファイル

インストールされる実行可能ファイル

コマンド種類公開範囲メモ
idn2cliグローバル実行可能ファイル

鮮度

バージョンと鮮度

これらの信号は、ページ生成時期、パッケージマネージャの活動、上流リリース比較を分けて示します。バージョン遅れは、証拠 URL と比較可能なバージョンがある場合だけ警告されます。

ページ生成日2026-07-10
マネージャ版2.3.8
マネージャ更新日2026-06-22
ローカルデータOK
上流not checked
検出された最新未検出

https://www.gnu.org/software/libidn/#libidn2

インストールメタデータ

パッケージメタデータ

パッケージキーbrew:libidn2
バージョン2.3.8
パッケージマネージャHomebrew
パッケージマネージャページhttps://formulae.brew.sh/formula/libidn2
ホームページhttps://www.gnu.org/software/libidn/#libidn2
リポジトリhttps://git.savannah.gnu.org/git/libidn/libidn2.git
上流ドキュメントhttps://www.gnu.org/software/libidn/libidn2/manual/libidn2.html
ライセンス(GPL-2.0-or-later OR LGPL-3.0-or-later) AND (Unicode-TOU AND Unicode-DFS-2016) AND GPL-3.0-or-later AND LGPL-2.1-or-later AND FSFAP-no-warranty-disclaimer
ソースアーカイブhttps://ftpmirror.gnu.org/gnu/libidn/libidn2-2.3.8.tar.gz
最終更新2026-06-22T14:05:18-07:00
Pulseupdated
依存関係gettext, libunistring
ビルド依存関係pkgconf
Bottle利用可能 (対象 arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, sonoma, ventura, x86_64_linux)
Homebrew post-install未定義
サービス宣言なし

レジストリ情報

ソースデータベース詳細

Source DatabaseHomebrew formula API
Taphomebrew/core
Full Namelibidn2
Version Scheme0
Revision0
Head VersionHEAD
Bottle Stable Root URLhttps://ghcr.io/v2/homebrew/core
Deprecatedno
Disabledno
Keg Onlyno
URL Keys
  • head
  • stable

ソースデータベース一致

他のパッケージマネージャ記録

一致は外部パッケージマネージャインデックスから取得され、ローカルの Automic Vault パッケージリンクとは分けて表示されます。

Debian apt95%

idn2 2.3.8-2

Internationalized domain names (IDNA2008/TR46) command line tool

https://www.gnu.org/software/libidn/#libidn2

sudo apt install idn2
  • Section: devel
  • Architecture: amd64
  • Source Package: libidn2
  • 3 依存関係
  • 1 任意依存関係
  • normalized package name match
  • 一致条件: Libidn2
Debian stable package indexes · deb.debian.org · Debian stable package indexes: idn2 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz
Debian apt95%

libidn2-0 2.3.8-2

Internationalized domain names (IDNA2008/TR46) library

https://www.gnu.org/software/libidn/#libidn2

sudo apt install libidn2-0
  • Section: libs
  • Architecture: amd64
  • Source Package: libidn2
  • 2 依存関係
  • normalized package name match
  • 一致条件: Libidn2
Debian stable package indexes · deb.debian.org · Debian stable package indexes: libidn2-0 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz
Debian apt95%

libidn2-dev 2.3.8-2

Internationalized domain names (IDNA2008/TR46) development files

https://www.gnu.org/software/libidn/#libidn2

sudo apt install libidn2-dev
  • Section: libdevel
  • Architecture: amd64
  • Source Package: libidn2
  • 1 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Libidn2
Debian stable package indexes · deb.debian.org · Debian stable package indexes: libidn2-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz
Debian apt95%

libidn2-doc 2.3.8-2

Internationalized domain names (IDNA2008/TR46) documentation

https://www.gnu.org/software/libidn/#libidn2

sudo apt install libidn2-doc
  • Section: doc
  • Architecture: all
  • Source Package: libidn2
  • 1 任意依存関係
  • normalized package name match
  • 一致条件: Libidn2
Debian stable package indexes · deb.debian.org · Debian stable package indexes: libidn2-doc from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz
Nix95%

libidn2

nix profile install nixpkgs#libidn2
  • normalized package name match
  • 一致条件: Libidn2
nixpkgs package indexes · raw.githubusercontent.com · nixpkgs package indexes: libidn2 from https://raw.githubusercontent.com/NixOS/nixpkgs/master/pkgs/top-level/all-packages.nix
Ubuntu apt95%

idn2 2.3.7-2build1

Internationalized domain names (IDNA2008/TR46) command line tool

https://www.gnu.org/software/libidn/#libidn2

sudo apt install idn2
  • Section: universe/devel
  • Architecture: amd64
  • Source Package: libidn2
  • 3 依存関係
  • normalized package name match
  • 一致条件: Libidn2
Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: idn2 from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz
Ubuntu apt95%

libidn2-0 2.3.7-2build1

Internationalized domain names (IDNA2008/TR46) library

https://www.gnu.org/software/libidn/#libidn2

sudo apt install libidn2-0
  • Section: libs
  • Architecture: amd64
  • Source Package: libidn2
  • 2 依存関係
  • normalized package name match
  • 一致条件: Libidn2
Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: libidn2-0 from https://archive.ubuntu.com/ubuntu/dists/noble/main/binary-amd64/Packages.gz
Ubuntu apt95%

libidn2-dev 2.3.7-2build1

Internationalized domain names (IDNA2008/TR46) development files

https://www.gnu.org/software/libidn/#libidn2

sudo apt install libidn2-dev
  • Section: libdevel
  • Architecture: amd64
  • Source Package: libidn2
  • 1 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Libidn2
Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: libidn2-dev from https://archive.ubuntu.com/ubuntu/dists/noble/main/binary-amd64/Packages.gz
Ubuntu apt95%

libidn2-doc 2.3.7-2build1

Internationalized domain names (IDNA2008/TR46) documentation

https://www.gnu.org/software/libidn/#libidn2

sudo apt install libidn2-doc
  • Section: doc
  • Architecture: all
  • Source Package: libidn2
  • 1 任意依存関係
  • normalized package name match
  • 一致条件: Libidn2
Ubuntu 24.04 LTS package indexes · archive.ubuntu.com · Ubuntu 24.04 LTS package indexes: libidn2-doc from https://archive.ubuntu.com/ubuntu/dists/noble/main/binary-amd64/Packages.gz
apk95%

idn2-utils 2.3.8-r0

Encode/Decode library for internationalized domain names (CLI utilities)

https://www.gnu.org/software/libidn#libidn2

sudo apk add idn2-utils
  • License: GPL-3.0-or-later
  • Architecture: x86_64
  • Source Package: libidn2
  • 1 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Libidn2
Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: idn2-utils from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz
apk95%

libidn2 2.3.8-r0

Encode/Decode library for internationalized domain names

https://www.gnu.org/software/libidn#libidn2

sudo apk add libidn2
  • License: GPL-2.0-or-later OR LGPL-3.0-or-later
  • Architecture: x86_64
  • Source Package: libidn2
  • 1 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Libidn2
Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: libidn2 from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz
apk95%

libidn2-dev 2.3.8-r0

Encode/Decode library for internationalized domain names (development files)

https://www.gnu.org/software/libidn#libidn2

sudo apk add libidn2-dev
  • License: GPL-2.0-or-later OR LGPL-3.0-or-later
  • Architecture: x86_64
  • Source Package: libidn2
  • 1 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Libidn2
Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: libidn2-dev from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz
apk95%

libidn2-doc 2.3.8-r0

Encode/Decode library for internationalized domain names (documentation)

https://www.gnu.org/software/libidn#libidn2

sudo apk add libidn2-doc
  • License: GPL-2.0-or-later OR LGPL-3.0-or-later
  • Architecture: x86_64
  • Source Package: libidn2
  • normalized package name match
  • 一致条件: Libidn2
Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: libidn2-doc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz
apk95%

libidn2-static 2.3.8-r0

Encode/Decode library for internationalized domain names (static library)

https://www.gnu.org/software/libidn#libidn2

sudo apk add libidn2-static
  • License: GPL-2.0-or-later OR LGPL-3.0-or-later
  • Architecture: x86_64
  • Source Package: libidn2
  • normalized package name match
  • 一致条件: Libidn2
Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: libidn2-static from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz
dnf95%

idn2 2.3.8-3.fc44

IDNA2008 internationalized domain names conversion tool

https://www.gnu.org/software/libidn/#libidn2

sudo dnf install idn2
  • License: GPL-3.0-or-later
  • Category: Unspecified
  • Architecture: x86_64
  • Source Package: libidn2
  • 5 依存関係
  • 1 提供
  • normalized package name match
  • 一致条件: Libidn2
Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: idn2 from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst
dnf95%

libidn2 2.3.8-3.fc44

Library to support IDNA2008 internationalized domain names

https://www.gnu.org/software/libidn/#libidn2

sudo dnf install libidn2
  • License: (GPL-2.0-or-later OR LGPL-3.0-or-later) AND GPL-3.0-or-later
  • Category: Unspecified
  • Architecture: i686
  • Source Package: libidn2
  • 3 依存関係
  • 3 提供
  • normalized package name match
  • 一致条件: Libidn2
Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: libidn2 from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst

パッケージグラフ

リンクは、ローカルのパッケージ関係グラフ、補足データ、依存関係、エコシステム一致、パッケージハブ所属から来ています。

関連ツール

  • gettextRuntime dependency declared by Homebrew.
  • pkgconfBuild dependency declared by Homebrew.
  • bindPopular package that depends on this formula.
  • felinksPopular package that depends on this formula.
  • freediameterPopular package that depends on this formula.
  • getdnsPopular package that depends on this formula.
  • gnunetPopular package that depends on this formula.
  • gnutlsPopular package that depends on this formula.

同じワークフロー

  • adnsShares av.db curated category or tags: cli, dns, library, networking.
  • c-aresShares av.db curated category or tags: cli, dns, library, networking.
  • hesiodShares av.db curated category or tags: cli, dns, library, networking.
  • aliddnsShares av.db curated category or tags: cli, dns, networking.
  • cdncheckShares av.db curated category or tags: cli, dns, networking.
  • checkdmarcShares av.db curated category or tags: cli, dns, networking.

エージェント安全ガイド

ソース経路

リポジトリデータから生成

このページは scripts/generate-pkg-sqlite.py が生成した非公開のパッケージ SQLite アーティファクトから av-web によって提供されます。

使用ソース

  • Geiger risk classifier
  • Nucleus package database
  • av.db category and tag curation
  • cross-ecosystem install command graph
  • curated package history
  • external package-manager database matches
  • package relationship graph
  • package version freshness
  • package-page enrichment