Awesome
The Cryspen HACL Packages
This repository contains ready-to-use crypto packages developed by Cryspen on top of HACL*. In particular, it contains a portable C crypto library that selects optimized implementations for each platform, as well as Rust, OCaml, and JavaScript bindings for this library.
Currently, we are in the process of adding more usable APIs, providing extensive documentation, and further optimizing the algorithms.
What is HACL* and why should you use HACL Packages?
HACL* is a collection of high-assurance cryptographic algorithms developed as part of Project Everest. It includes source code written in F*, generated C code, verified assembly code from the Vale project, and an agile multiplexed cryptographic provider called EverCrypt. As such, the full HACL* repository contains many software artifacts and a complicated build system that can be intimidating to a crypto developer who simply wishes to use verified crypto.
Quickstart
Install build dependencies
We need the following dependencies ...
- cmake (3.17 or newer)
- ninja (1.10 or newer)
- python (3.6 or newer)
- clang (7 or newer) or gcc (7 or newer)
Depending on your system you can install them as follows (click to expand) ...
<details> <summary><b>Arch Linux</b></summary>$ sudo pacman -S cmake ninja python
# Either of ...
$ sudo pacman -S clang
$ sudo pacman -S gcc
$ sudo dnf install cmake ninja-build python3
# Either of ...
$ sudo dnf install clang
$ sudo dnf install gcc
$ sudo apt install cmake ninja-build python3
# Either of ...
$ sudo apt install clang
$ sudo apt install gcc
$ brew install cmake ninja python
# Either of ...
$ brew install llvm
$ brew install gcc
Build (and test) HACL Packages
You can run ...
$ ./mach build --test
... to build HACL Packages and run the tests. All actions are driven by mach. See ./mach --help for details.
Platform support
The HACL Packages are supported based on the following tiers.
Tier 1
Tier 1 targets are guaranteed to work. These targets have automated testing to ensure that changes do not break them.
- x86_64 Linux (x86_64-unknown-linux-gnu)
- x86 Linux (i686-unknown-linux-gnu)
- x86_64 macOS (x86_64-apple-darwin)
- x86_64 Windows
- x86_64-pc-windows-msvc
- x86_64-pc-windows-clang
- x86 Windows (i686-pc-windows-msvc)
Tier 2
Tier 2 targets are guaranteed to build. These targets have automated builds to ensure that changes do not break the builds. However, not all of them are always tested.
- arm64 macOS (aarch64-apple-darwin)
- arm64 Linux (aarch64-unknown-linux-gnu)
- arm64 Android (aarch64-linux-android)
- arm64 iOS (aarch64-apple-ios)
- s390x z14 Linux (s390x-unknown-linux-gnu)
Tier 3
Tier 3 targets are supported by the code but there are no automated checks and there is no guarantee that they work.
- ARMv7 Android (aarch64arm-linux-androideabi)
- arm64 iOS Simulator (aarch64-apple-ios-sim)
- x86_64 iOS (x86_64-apple-ios)
- PowerPC
- FreeBSD / x64
Compiler support
<!-- When using the `c89` edition of HACL GCC 4.8 and up are supported. In any other case a modern C compiler is expected. -->A modern C compiler is expected.
Algorithms
The following tables gives an overview over the algorithms supported by the HACL packages.
| Family | Algorithm | Support |
|---|---|---|
| AEAD | AES-GCM 128 | AES-NI & CLMUL (x86 only) |
| AEAD | AES-GCM 256 | AES-NI & CLMUL (x86 only) |
| AEAD | Chacha20-Poly1305 | Portable | vec128 | vec256 |
| ECDH | Curve25519 | Portable | BMI2 & ADX |
| ECDH | P-256 | Portable |
| Signature | Ed25519 | Portable |
| Signature | ECDSA P-256r1 | Portable |
| Signature | ECDSA P-256k1 | Portable |
| Signature | RSA-PSS | Portable |
| Hash | SHA2-224 | Portable | SHAEXT |
| Hash | SHA2-256 | Portable | SHAEXT |
| Hash | SHA2-384 | Portable |
| Hash | SHA2-512 | Portable |
| Hash | SHA3 | Portable |
| Hash | Blake2 | Portable | vec128 | vec256 |
| Key Derivation | HKDF | Portable (depends on hash) |
| Symmetric Encryption | Chacha20 | Portable | vec128 | vec256 |
| Symmetric Encryption | AES 128 | AES-NI & CLMUL (x86 only) |
| Symmetric Encryption | AES 256 | AES-NI & CLMUL (x86 only) |
| MAC | HMAC | Portable (depends on hash) |
| MAC | Poly1305 | Portable | vec128 | vec256 | x64 ASM |
Testing
Testing is done with gtest and requires a C++11 compiler (or C++20 MSVC).
Measure Test Coverage
Test coverage in HACL Packages can be measured with ...
./mach build --tests --coverage
./mach test --coverage
./tools/coverage.sh
Note that only clang is supported as a compiler and you may get an error ...
cc: error: unrecognized command-line option ‘-fprofile-instr-generate’; did you mean ‘-fprofile-generate’?
... when your default compiler is not clang.
In this case, try to set the CC and CXX environment variables accordingly ...
export CC=clang
export CXX=clang++
Furthermore, additional tools are required to measure (and view) test coverage.
Make sure you have lcov and genhtml.
For Ubuntu these can be installed via ...
$ sudo apt install lcov
When everything went well you should be able to view the coverage reports with, e.g., ...
firefox build/Debug/coverage/full/html/index.html
Dependencies
Tests require the nlohmann_json package to read json test files. CMake takes care of pulling and building the package.
License
HACL packages are licensed under either of
at your option.