Downloads

CKey packages for Swift, the web, Android, .NET, C and C++, and the command line. Every file is listed with its SHA-256 checksum, so you can check it before you use it.

CKey packages are open source under the MIT licence. This website is proprietary and isn’t covered by it.

Release files

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Install

No CKey package is in a public registry yet. Until one is, install from the release files above, replacing VERSION with the version they list, or build from source.

Swift Package Manager

iOS 15 and macOS 12 or later. In Xcode, choose File, Add Package Dependencies, and enter the repository URL.

.package(url: "https://github.com/clearkeysolutions/ckey", from: "0.1.0"),
.target(name: "MyApp", dependencies: [.product(name: "CKey", package: "ckey")]),

npm, for the web

An ES module with the WebAssembly core, for browsers, workers and Node 22.

npm install ./ckey-VERSION.tgz     # from the release files
npm install ckey                   # once it is published

Maven, for Android

Unzip the Maven repository from the release files into ./maven. Minimum SDK 24.

repositories { maven { url = uri("maven") } }
dependencies { implementation("org.openckey:ckey:VERSION") }

NuGet, for .NET
For net8.0 and netstandard2.0, with CKey.Wpf for WPF.
```
dotnet add package CKey --version VERSION --source ./packages
```

CMake, for C and C++

Unpack the archive for your platform, then point CMake at it.

# cmake -S . -B build -DCMAKE_PREFIX_PATH=/path/to/ckey-VERSION-<platform>
find_package(CKey REQUIRED)
target_link_libraries(app PRIVATE CKey::core)

Homebrew, for the command line

The ckey tool, which writes SVG, PNG and PDF. It sends no telemetry.

brew install --formula ./ckey.rb
ckey encode-scalable --utf8 "https://openckey.org" --out code.svg

Each platform’s API is in the SDK quick starts.

Verify a download

Check a file before you build with it. A matching checksum shows it arrived intact; the attestation shows it was built by the CKey release workflow from the public repository.

Compare the checksum

The result must match the SHA-256 listed with the file.
```
shasum -a 256 ckey-VERSION.tgz
```
Check the build attestation

Files from a GitHub Release carry a signed build provenance attestation. Check it with the GitHub CLI.
```
gh attestation verify ckey-VERSION.tgz --repo clearkeysolutions/ckey
```