macOS
Homebrewverified · 100%
brew install keystonelocal Homebrew formula metadata
MacPortsverified · 94%
sudo port install keystoneMacPorts ports tree · devel/keystone/Portfile · source: api.github.com
brew
Install keystone with Homebrew, apk, apt, MacPorts, Nix, pacman
Assembler framework: Core + bindings. Version 0.9.2 via Homebrew; verified 2026-05-15.
install
Additional install commands
Linux
Alpine Linux apkverified · 92%
sudo apk add keystoneAlpine Linux edge package indexes · keystone · source: dl-cdn.alpinelinux.org
Debian aptverified · 92%
sudo apt install keystoneDebian stable package indexes · keystone · source: deb.debian.org
Nixverified · 92%
nix profile install nixpkgs#keystonenixpkgs package indexes · pkgs/by-name/ke/keystone/package.nix · source: api.github.com
Arch Linux pacmanverified · 92%
sudo pacman -S keystoneArch Linux sync databases · keystone · source: geo.mirror.pkgbuild.com
overview
Package summary
Assembler framework: Core + bindings
Project links
Commands and aliases
- kstool
history
Project history and usage
Keystone Engine is a multi-architecture assembler framework created for reverse-engineering, binary instrumentation, exploit-development, and dynamic-code-generation tooling. It is commonly discussed alongside Capstone, its disassembler sibling, because Keystone fills the assembler side of the same multi-architecture tooling space.
Project history
Keystone's own changelog records version 0.9 as the initial public release on May 31, 2016. The project describes itself as a lightweight, multi-platform, multi-architecture assembler framework implemented in C/C++, based on LLVM, and exposing bindings for many languages.
The 0.9.1 release on July 27, 2016 added Haskell and OCaml bindings and improved kstool and architecture support. The 0.9.2 release on June 21, 2020 focused on Python packaging, while the 0.9.2 release-candidate notes list Ethereum VM support, more language bindings, Android cross-compilation improvements, and assembly-behavior fixes across X86, Arm, Arm64, Mips, and PowerPC.
Adoption history
Keystone gained adoption in reverse-engineering culture because it offered a reusable assembler library rather than a single command-line assembler. The repository documents language bindings for Java, Masm, C#, PowerShell, Perl, Python, NodeJS, Ruby, Go, Rust, Haskell, VB6, and OCaml, which made the engine usable from scripting environments and binary-analysis frameworks.
Package-manager coverage in this batch includes Homebrew, Debian, Ubuntu, Arch, MacPorts, Nix, and Alpine, indicating that Keystone moved beyond its upstream source tree into the normal packaging channels used by security researchers and systems developers.
How it is used
The CLI entry point packaged by Homebrew is kstool, while the main value of Keystone is the library API: programs call the engine to turn architecture-specific assembly text into machine-code bytes. Its multi-architecture scope makes it useful for tests, shellcode generation, binary rewriting, and educational tooling.
Why package nerds care
Keystone matters to package nerds because it is infrastructure for other tooling: a small command in a package manager represents a large cross-platform assembly engine, LLVM-derived internals, and a bundle of language bindings. It is also a good example of reverse-engineering tools becoming ordinary installable packages across Unix-like distributions.
Timeline
- 2016-05-31: Keystone 0.9 initial public release.
- 2016-07-27: Keystone 0.9.1 added kstool improvements and Haskell and OCaml bindings.
- 2020-06-13: Keystone 0.9.2-rc1 added Ethereum VM support and additional bindings.
- 2020-06-21: Keystone 0.9.2 fixed Python binding packaging.
Related projects
- Capstone is the closely related disassembly framework from the same broader tooling ecosystem. LLVM provides the machine-code infrastructure on which Keystone is based.
Sources
security posture
Risk level: green
narrow executable package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- narrow executable package without higher-risk signals
Signals
- metadata:no-higher-risk-signals
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 6 platform targets.
- Build metadata lists 2 build dependencies.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
kstool | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-08
manager version0.9.2
manager updated2026-05-15
local dataok
upstreamcurrent
latest detected0.9.2
https://github.com/keystone-engine/keystone
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:keystone |
|---|---|
| Version | 0.9.2 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/keystone |
| Homepage | https://github.com/keystone-engine/keystone |
| Repository | https://github.com/keystone-engine/keystone |
| Upstream docs | https://github.com/keystone-engine/keystone#readme |
| License | GPL-2.0-only |
| Source archive | https://github.com/keystone-engine/keystone/archive/refs/tags/0.9.2.tar.gz |
| Last updated | 2026-05-15T08:40:30-04:00 |
| Pulse | updated |
| Build dependencies | cmake, python@3.14 |
| Bottle | available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | keystone |
| Version Scheme | 0 |
| Revision | 1 |
| Head Version | HEAD |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
Debian apt95%
keystone 2:27.0.0-3+deb13u1
OpenStack identity service
http://keystone.openstack.org/
sudo apt install keystone- Section: python
- Architecture: all
- 13 dependencies
- 1 optional deps
- normalized package name match
- Matched by: Keystone
Debian apt95%
keystone-doc 2:27.0.0-3+deb13u1
OpenStack identity service - documentation
http://keystone.openstack.org/
sudo apt install keystone-doc- Section: doc
- Architecture: all
- Source Package: keystone
- 1 dependencies
- normalized package name match
- Matched by: Keystone
Debian apt95%
python3-keystone 2:27.0.0-3+deb13u1
OpenStack identity service - library
http://keystone.openstack.org/
sudo apt install python3-keystone- Section: python
- Architecture: all
- Source Package: keystone
- 32 dependencies
- normalized package name match
- Matched by: Keystone
Nix95%
keystone
nix profile install nixpkgs#keystone- normalized package name match
- Matched by: Keystone
Ubuntu apt95%
keystone 2:25.0.0-0ubuntu1
OpenStack identity service - Daemons
https://opendev.org/openstack/keystone
sudo apt install keystone- Section: python
- Architecture: all
- 6 dependencies
- 2 optional deps
- normalized package name match
- Matched by: Keystone
Ubuntu apt95%
keystone-common 2:25.0.0-0ubuntu1
OpenStack identity service - Common files
https://opendev.org/openstack/keystone
sudo apt install keystone-common- Section: python
- Architecture: all
- Source Package: keystone
- normalized package name match
- Matched by: Keystone
Ubuntu apt95%
keystone-doc 2:25.0.0-0ubuntu1
OpenStack identity service - Documentation
https://opendev.org/openstack/keystone
sudo apt install keystone-doc- Section: doc
- Architecture: all
- Source Package: keystone
- 2 dependencies
- normalized package name match
- Matched by: Keystone
Ubuntu apt95%
python3-keystone 2:25.0.0-0ubuntu1
OpenStack identity service - Python 3 library
https://opendev.org/openstack/keystone
sudo apt install python3-keystone- Section: python
- Architecture: all
- Source Package: keystone
- 32 dependencies
- 2 optional deps
- normalized package name match
- Matched by: Keystone
apk95%
keystone 0.9.2-r6
Keystone assembler framework: Core (Arm, Arm64, Hexagon, Mips, PowerPC, Sparc, SystemZ & X86) + bindings
https://www.keystone-engine.org/
sudo apk add keystone- License: custom
- Architecture: x86_64
- Source Package: keystone
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Keystone
apk95%
keystone-dev 0.9.2-r6
Keystone assembler framework: Core (Arm, Arm64, Hexagon, Mips, PowerPC, Sparc, SystemZ & X86) + bindings (development files)
https://www.keystone-engine.org/
sudo apk add keystone-dev- License: custom
- Architecture: x86_64
- Source Package: keystone
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Keystone
apk95%
keystone-python 0.9.2-r6
keystone python3 bindings
https://www.keystone-engine.org/
sudo apk add keystone-python- License: custom
- Architecture: x86_64
- Source Package: keystone
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Keystone
apk95%
keystone-python-pyc 0.9.2-r6
Precompiled Python bytecode for keystone-python
https://www.keystone-engine.org/
sudo apk add keystone-python-pyc- License: custom
- Architecture: x86_64
- Source Package: keystone
- 1 dependencies
- normalized package name match
- Matched by: Keystone
pacman95%
keystone 0.9.2-8
Lightweight multi-platform, multi-architecture assembler framework
https://www.keystone-engine.org/
sudo pacman -S keystone- License: GPL2
- Architecture: x86_64
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Keystone
MacPorts95%
keystone
sudo port install keystone- normalized package name match
- Matched by: Keystone
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- 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