安装

其他安装命令

macOS

Homebrew已验证 · 100%

brew install base91

local Homebrew formula metadata

MacPorts已验证 · 94%

sudo port install base91

MacPorts ports tree · mail/base91/Portfile · 来源: api.github.com

Linux

Nix已验证 · 92%

nix profile install nixpkgs#base91

nixpkgs package indexes · pkgs/by-name/ba/base91/package.nix · 来源: api.github.com

概览

软件包摘要

Utility to encode and decode base91 files

项目链接

命令和别名

b91dec
b91enc
base91

历史

项目历史与用法

basE91 is a binary-to-text encoding method and command-line tool that encodes binary data as ASCII characters with less overhead than Base64 for many inputs.

项目历史

The SourceForge project page describes basE91 as an advanced method for encoding binary data as ASCII characters, similar to uuencode or Base64 but more efficient. It reports overhead of at most 23 percent and as low as 14 percent depending on input.

The SourceForge files page identifies the latest 0.6.0 Java archive release in November 2006, and the project page shows project activity dating to October 2006. The project's official website remains base91.sourceforge.net.

采用历史

basE91 remains niche, but the input package metadata lists Homebrew, MacPorts, and Nix packaging, and the SourceForge project records tens of thousands of file downloads over its lifetime. Its adoption is mostly among developers who specifically need denser ASCII armoring than Base64 rather than users of general-purpose OS tooling.

The project page classifies it under data formats, terminals, email, algorithms, and internet topics, reflecting the encoding's intended transport and storage use cases.

使用方式

The packaged CLI exposes base91 plus b91enc and b91dec executables according to the Homebrew input metadata. It is used as an encoder/decoder filter for files or streams where ASCII-safe text output is required.

There is no documented configuration file or credentials store; the tool is a stateless encoder/decoder.

为什么软件包爱好者会关心

basE91 is significant as one of the better-known post-Base64 ASCII-armoring experiments. It trades simplicity and universal support for denser output, which makes it a useful reference point in discussions of binary-to-text encoding efficiency.

Its package-manager presence is also a classic long-tail case: a 2006 SourceForge utility still appears in modern package indexes because encoding tools age slowly when their formats are stable.

时间线

2006: SourceForge project activity and project metadata date basE91 to October 2006.
2006: Latest SourceForge release path records version 0.6.0 in November 2006.
2020s: Input package metadata shows basE91 available through Homebrew, MacPorts, and Nix.

Related projects

Base64 and uuencode are the official comparison points named by the SourceForge description.
Other ASCII-armoring and binary-to-text encodings, including Ascii85/Base85, are conceptually adjacent even though they are separate formats.
SourceForge hosts the original project site and release files for basE91.

来源

https://base91.sourceforge.net/
https://sourceforge.net/projects/base91
https://sourceforge.net/projects/base91/files/
source_facts.package-manager

安全态势

风险级别：绿色

narrow executable package without higher-risk signals.

风险分类器

绿色风险 · 低置信度 · appliance

原因

narrow executable package without higher-risk signals

信号

metadata:no-higher-risk-signals

安装行为

formula 元数据中未记录 Homebrew post-install 钩子。
Homebrew bottle 元数据适用于 13 个平台目标。

建议审查

在无人值守的代理使用前，请检查该工具是否读取明文凭据、写入远程状态、发布制品或调用插件。

可执行文件

已安装的可执行文件

命令	类型	暴露范围
`b91dec`	cli	全局可执行文件
`b91enc`	cli	全局可执行文件
`base91`	cli	全局可执行文件

新鲜度

版本和新鲜度

这些信号区分页生成时间、软件包管理器活动和上游发布比较。只有存在证据 URL 和可比较版本时，才会提示版本落后。

页面生成时间2026-07-08

管理器版本0.6.0

管理器更新时间

本地数据OK

上游not checked

检测到的最新版本未检测到

https://base91.sourceforge.net/

信息No package-manager update timestamp was available.低置信度
信息Release/tag comparison is only available for GitHub repositories.https://base91.sourceforge.net/none 置信度

安装元数据

软件包元数据

软件包键	brew:base91
版本	0.6.0
软件包管理器	Homebrew
软件包管理器页面	https://formulae.brew.sh/formula/base91
主页	https://base91.sourceforge.net/
上游文档	https://base91.sourceforge.net/
许可证	BSD-3-Clause
源码归档	https://downloads.sourceforge.net/project/base91/basE91/0.6.0/base91-0.6.0.tar.gz
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, x86_64_linux)
Homebrew post-install	未定义
服务	未声明

注册表事实

源数据库详情

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	base91
Version Scheme	0
Revision	0
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	stable

源数据库匹配

其他软件包管理器记录

匹配项来自外部软件包管理器索引，并与本地 Automic Vault 软件包链接分开显示。

Nix95%

base91

nix profile install nixpkgs#base91

normalized package name match
匹配方式：Base91

nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/ba/base91/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

MacPorts95%

base91

sudo port install base91

normalized package name match
匹配方式：Base91

MacPorts ports tree · api.github.com · MacPorts ports tree: mail/base91/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

软件包图谱

链接来自本地软件包关系图、补充数据、依赖边、生态匹配和软件包 hub 归属。

来源线索

由仓库数据生成

此页面由 av-web 从 scripts/generate-pkg-sqlite.py 生成的私有软件包 SQLite 工件提供。

Combined YAML source

View the package source record on GitHub.

combined/base91.yml

使用的来源

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

使用 Homebrew, MacPorts, Nix 安装 base91