# 使用 Homebrew, apk, dnf, MacPorts, Nix, pacman, apt, zypper 安装 libotr 查看 libotr 的安装路径、可执行文件、元数据以及面向 AI 代理工作流的安全说明。 ## 安装 ```sh sudo av install brew:libotr ``` 其他安装命令: ### macOS - Homebrew (100%): ```sh brew install libotr ``` 证据: local Homebrew formula metadata - MacPorts (94%): ```sh sudo port install libotr ``` 证据: MacPorts ports tree: security/libotr/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ### Linux - apk (92%): ```sh sudo apk add libotr ``` 证据: Alpine Linux edge package indexes: libotr from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz - dnf (92%): ```sh sudo dnf install libotr ``` 证据: Fedora Rawhide package metadata: libotr from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst - Nix (92%): ```sh nix profile install nixpkgs#libotr ``` 证据: nixpkgs package indexes: pkgs/by-name/li/libotr/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - pacman (92%): ```sh sudo pacman -S libotr ``` 证据: Arch Linux sync databases: libotr from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz - Debian apt (92%): ```sh sudo apt install libotr5-bin ``` 证据: Debian stable package indexes: libotr5-bin from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz - zypper (92%): ```sh sudo zypper install libotr-devel ``` 证据: openSUSE Tumbleweed package metadata: libotr-devel from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst ## 软件包事实 - **软件包键:** brew:libotr - **软件包管理器:** Homebrew - **软件包管理器页面:** - **版本:** 4.1.1 - **来源摘要:** Off-The-Record (OTR) messaging library - **主页:** - **上游文档:** - **许可证:** LGPL-2.1-only AND GPL-2.0-only - **源码归档:** - **已生成:** 2026-08-04T22:13:35+00:00 ## 可执行文件 - otr_mackey (cli) - otr_modify (cli) - otr_parse (cli) - otr_readforge (cli) - otr_remac (cli) - otr_sesskeys (cli) - otr_mackey (别名) - otr_modify (别名) - otr_parse (别名) - otr_readforge (别名) - otr_remac (别名) - otr_sesskeys (别名) ## 依赖 - libgcrypt - libgpg-error ## 安装行为 - post-install 钩子: 未定义 - Bottle: 可用 于 arm64_big_sur, arm64_linux, arm64_monterey, arm64_sequoia, arm64_sonoma, arm64_tahoe, arm64_ventura, big_sur, catalina, monterey, sonoma, ventura ## 版本和新鲜度 - 页面生成时间: 2026-08-04 - 管理器版本: 4.1.1 - 本地数据: OK - 上游仓库: https://otr.cypherpunks.ca/ - 信息: No package-manager update timestamp was available. - 信息: Release/tag comparison is only available for GitHub repositories. ## 项目历史与用法 libotr is the portable C library and toolkit for Off-the-Record Messaging, a protocol for private instant-messaging conversations with encryption, authentication during the conversation, deniability after the fact, and perfect forward secrecy. ### 项目历史 OTR came from academic and cypherpunk work on making instant messaging behave more like an off-the-record conversation than signed email. The official OTR site links the library, the Pidgin plugin, protocol descriptions, and the original research papers as one software-and-protocol family. libotr served as the reference C implementation for client developers. The project paired the LGPL library with GPL toolkit programs and with pidgin-otr, making it practical for multiprotocol IM clients to add OTR without each client reimplementing the cryptographic state machine. ### 采用历史 OTR became especially associated with desktop XMPP and multiprotocol IM clients. XMPP Extension Protocol 0364 described OTR as the de facto standard for end-to-end encryption in XMPP, while the OTR site maintained user-facing downloads for pidgin-otr, source repositories, protocol documents, and implementation lists. ### 使用方式 Applications link libotr to negotiate OTR sessions, run the authenticated key exchange, encrypt and authenticate data messages, and expose higher-level verification flows such as the Socialist Millionaires' Protocol. The Homebrew package also installs toolkit programs for inspecting, modifying, and testing OTR message artifacts. ### 为什么软件包爱好者会关心 libotr matters because it is a small library package carrying a big protocol story: it let package managers deliver interoperable deniable encryption to chat clients before modern app-specific encrypted messengers became dominant. Its 2016 security release also shows why distro maintainers cared about keeping even niche crypto libraries patched. ### 时间线 - 2004: The OTR design was published in the WPES paper linked from the official OTR documentation. - 2012: libotr 4.0.0 and pidgin-otr 4.0.0 were released. - 2014: libotr 4.1.0 was released with build-system, secure-memory, constant-time comparison, and API changes. - 2016: libotr 4.1.1 fixed CVE-2016-2851 and tightened protocol parsing. ### Related projects - pidgin-otr is the best-known client plugin distributed alongside libotr by the OTR project. - The OTR protocol documents define the wire protocol that libotr implements. - XMPP clients and multiprotocol IM clients were the main ecosystem where libotr was reused. ### 来源 - - - - - ## 安全说明 library-like package without higher-risk signals. - **Geiger 风险:** 绿色 / 低 - library-like package without higher-risk signals ## 源数据库详情 - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** libotr - **Version Scheme:** 0 - **Revision:** 0 - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** stable ## 其他软件包管理器记录 - Debian apt - libotr5-bin - 4.1.1-6: normalized package name match | Debian stable package indexes: libotr5-bin from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | toolkit for Off-the-Record Messaging library | https://otr.cypherpunks.ca/ - Debian apt - libotr5-dev - 4.1.1-6: normalized package name match | Debian stable package indexes: libotr5-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Off-the-Record Messaging library development files | https://otr.cypherpunks.ca/ - Debian apt - libotr5t64 - 4.1.1-6: normalized package name match | Debian stable package indexes: libotr5t64 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Off-the-Record Messaging library | https://otr.cypherpunks.ca/ - Nix - libotr: normalized package name match | nixpkgs package indexes: pkgs/by-name/li/libotr/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - libotr5-bin - 4.1.1-5.1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: libotr5-bin from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | toolkit for Off-the-Record Messaging library | https://otr.cypherpunks.ca/ - Ubuntu apt - libotr5-dev - 4.1.1-5.1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: libotr5-dev from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Off-the-Record Messaging library development files | https://otr.cypherpunks.ca/ - Ubuntu apt - libotr5t64 - 4.1.1-5.1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: libotr5t64 from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Off-the-Record Messaging library | https://otr.cypherpunks.ca/ - apk - libotr - 4.1.1-r5: normalized package name match | Alpine Linux edge package indexes: libotr from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Off The Record Messaging, an encryption library for secure IM conversations | http://otr.cypherpunks.ca/ - apk - libotr-dev - 4.1.1-r5: normalized package name match | Alpine Linux edge package indexes: libotr-dev from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Off The Record Messaging, an encryption library for secure IM conversations (development files) | http://otr.cypherpunks.ca/ - apk - libotr-doc - 4.1.1-r5: normalized package name match | Alpine Linux edge package indexes: libotr-doc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | Off The Record Messaging, an encryption library for secure IM conversations (documentation) | http://otr.cypherpunks.ca/ - apk - libotr-tools - 4.1.1-r5: normalized package name match | Alpine Linux edge package indexes: libotr-tools from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | libotr tools | http://otr.cypherpunks.ca/ - dnf - libotr - 4.1.1-26.fc45: normalized package name match | Fedora Rawhide package metadata: libotr from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Off-The-Record Messaging library and toolkit | http://otr.cypherpunks.ca/ - dnf - libotr-devel - 4.1.1-26.fc45: normalized package name match | Fedora Rawhide package metadata: libotr-devel from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/210a2053c8e007daf9ae39c2a21daaed9b2ddd07d63ecffa597050361e73650c-primary.xml.zst | Development library and include files for libotr | http://otr.cypherpunks.ca/ - pacman - libotr - 4.1.1-6: normalized package name match | Arch Linux sync databases: libotr from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz | Off-the-Record Messaging Library and Toolkit | https://otr.cypherpunks.ca/ - zypper - libotr-devel - 4.1.1-4.14: normalized package name match | openSUSE Tumbleweed package metadata: libotr-devel from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst | Include files and development libraries | https://www.cypherpunks.ca/otr/ - zypper - libotr-tools - 4.1.1-4.14: normalized package name match | openSUSE Tumbleweed package metadata: libotr-tools from https://download.opensuse.org/tumbleweed/repo/oss/repodata/50b07339cb64c8ed4091bdbabddadc1ff5737b090e478818a195b40d8a3292861a879139b4a3987c31109699fde9fbf4a716367ddf4eef77da75f96e3193d6ed-primary.xml.zst | "Off The Record" messaging library toolkit | https://www.cypherpunks.ca/otr/ ## 相关链接 - [Terminal utility packages](https://pkg.so/zh-hans/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Networking and protocol packages](https://pkg.so/zh-hans/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [Security and crypto packages](https://pkg.so/zh-hans/security-crypto-tools/) - Matched security, identity, cryptography, password, signing, or certificate metadata. - [Homebrew utility packages](https://pkg.so/zh-hans/brew-utility-packages/) - Matched Homebrew package provider. - [libgpg-error](https://pkg.so/zh-hans/brew/libgpg-error/) - Runtime dependency declared by Homebrew. - [libgcrypt](https://pkg.so/zh-hans/brew/libgcrypt/) - Runtime dependency declared by Homebrew. - [pidgin](https://pkg.so/zh-hans/brew/pidgin/) - Popular package that depends on this formula. - [profanity](https://pkg.so/zh-hans/brew/profanity/) - Popular package that depends on this formula. - [mcabber](https://pkg.so/zh-hans/brew/mcabber/) - Popular package that depends on this formula. - [mat2](https://pkg.so/zh-hans/brew/mat2/) - Shares pkgdb curated category or tags: cli, privacy, security. - [gnutls](https://pkg.so/zh-hans/brew/gnutls/) - Shares pkgdb curated category or tags: cli, cryptography, security. - [nettle](https://pkg.so/zh-hans/brew/nettle/) - Shares pkgdb curated category or tags: cli, cryptography, security. - [nss](https://pkg.so/zh-hans/brew/nss/) - Shares pkgdb curated category or tags: cli, cryptography, security. - [sqlcipher](https://pkg.so/zh-hans/brew/sqlcipher/) - Shares pkgdb curated category or tags: cli, cryptography, security. - [opensc](https://pkg.so/zh-hans/brew/opensc/) - Shares pkgdb curated category or tags: cli, cryptography, security. - [botan](https://pkg.so/zh-hans/brew/botan/) - Shares pkgdb curated category or tags: cli, cryptography, security. - [pdfcrack](https://pkg.so/zh-hans/brew/pdfcrack/) - Shares pkgdb curated category or tags: cli, cryptography, security. - [gnupg-pkcs11-scd](https://pkg.so/zh-hans/brew/gnupg-pkcs11-scd/) - Security-sensitive metadata or terminology overlaps. Shared terms: cli, cryptography, error, libgcrypt, libgpg. - [ntbtls](https://pkg.so/zh-hans/brew/ntbtls/) - Security-sensitive metadata or terminology overlaps. Shared terms: cli, cryptography, error, libgcrypt, libgpg. - [aide](https://pkg.so/zh-hans/brew/aide/) - Security-sensitive metadata or terminology overlaps. Shared terms: cli, error, libgcrypt, libgpg, libgpg-error. ## Combined YAML source View the package source record on GitHub. [combined/libotr.yml](https://github.com/mxcl/pkgdb/blob/main/combined/libotr.yml) ## 来源 - 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