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Turtl core-rs

(the failing New York Test)

Opening an issue? See the Turtl project tracker

This is the Rust core for Turtl. It houses the logic for Turtl's main client operations and is meant to be embedded as a shared/static library that is standard across all platforms. The idea is, if it can go in the core, it should go in the core. Pretty much everything except UI goes here:

  • User join/login/deletion
  • Talking to the server/syncing data
  • Encryption/Decryption of data
  • In-memory storage of profile data
  • Permissions checking
  • Searching of notes
  • Sharing/Collaboration handling
  • Local storage
  • Bookmark handling

When building a UI (Android/iOS/Desktop/etc etc) you should have to worry about two things: loading/talking to the core and building the interface around the core. All logic (syncing/crypto/storage) lives in the core.

Although the core project is posted, the new server it talks to (NodeJS/Postgres) is not yet public (yes, a fond farewell to Lisp). Stay tuned!

This project is unfinished and alpha status. I won't be responding to issues or bug reports on it yet. Use at your own risk.

Building the core

Let's go over how to build the Turtl core.


  • Rust >= 1.27.0
  • OpenSSL 1.0.x (shared or static)
  • Libsodium 1.0.16 (static preferred)



The Makefile includes (optionally) a non-versioned file called which can be used to house any ENV vars specific to your build environment:

# Example
export PATH := $(PATH):/your/custom/path
export RUSTFLAGS := -L/opt/lib64 -lmylib
export SODIUM_LIB_DIR := /opt/libsodium/lib
export SODIUM_STATIC := static
export OPENSSL_LIB_DIR=/usr/lib/openssl-1.0
export OPENSSL_INCLUDE_DIR=/usr/include/openssl-1.0

NOTE: If your system uses OpenSSL 1.1.0, you need to install OpenSSL 1.0.0 and tell make to use it with OPENSSL_LIB_DIR=/usr/lib/openssl-1.0 OPENSSL_INCLUDE_DIR=/usr/include/openssl-1.0 make for example. This would be a good place to use

NOTE 2: If your system has libsodium version different than 1.0.16 and your build fails, do this:

cargo build
tar xzf libsodium-1.0.16.tar.gz
cd libsodium-1.0.16
cp -r src/libsodium/.libs/* ../target/debug/deps/
cargo build

After every cargo clean or make clean you should do the last command


This section is a work in progress. To use the Turtl core embedded library, you'll have to know two things:

  • How to interface: see turtl_core.h
  • How to use: see for a list of commands you can send the core, and also check the integration tests for example usage. The integration tests strive for complete coverage of all the publicly-exported capabilities of the core library, so they should help somewhat with documentation (I know it's not a substitute, but I'd rather release the project then toil away on docs than the other way around).


This is a haphazard collection of random notes with no real organization. Sorry.

  • If you want to build the core for linux or android, see buildo.
  • When building turtl core for iOS, you need to use a libsodium.a that was compiled without --enable-minimal!! This is worth noting because libsodium/src/dist-build/ uses --enable-minimal when building...remove these directives before building libsodium!

Projects using the core


Turtl's logic core, built in Rust. Made for embedding in other platforms (desktop, mobile, possibly browser w/ Emscripten).







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