PHP Scrypt

A simple PHP Extension written in Rust to create scrypt password hashes. Supports building on X86-64 and ARM platforms.

Installation

Compiling Requirements

• Linux, MacOS or Windows-based operating system
• Latest Version of Rust Stable
• PHP 8.0 or newer
• Clang 5.0 or Later

Notes for Windows compilation

• This extension can only be compiled for PHP installations sourced from https://windows.php.net.
• Rust Nightly is required for Windows compilation.
• This extension requires the cl.exe compiler. This is usually bundled with Visual Studio.
• Stub generation does not work on Windows.

Building The Extension

Clone the repository into your project directory.

git clone https://github.com/appwrite/php-scrypt.git && \
cd php-scrypt

Compile the extension

cargo build --release

Building for Alpine

While writing this extension we found out that [Rust in general](rust-lang/rust#59302) still has a few issues with [musl libc](https://musl.libc.org/) found in Alpine. It is possible to build this project successfully by using an alternative linker and building on a gnu-based system targetting `linux-unknown-musl`.

We strongly recommend using zigbuild as the linker for this project as we found it's the most stable and easy to install alternate linker. we also use the "-C target-feature=crt-static" compiler flags to aid with building on musl as stated here.

The build command for these platforms will look like so:

RUSTFLAGS="-C target-feature=-crt-static" cargo zigbuild --workspace --all-targets --target x86_64-unknown-linux-musl --release

This will produce a .so file similar to a normal build.

Installing the Extension

Copy the compiled extension from the target directory into your PHP extension directory.

If you don't know where your PHP extension directory is you can run the following command:

php -i | grep extension_dir

Copy the extension to the directory outputted

cp target/release/libphp-scrypt.so /path/to/extension_dir

Depending on your OS, your extension may end with .dll for windows or .dylib for macOS.

Enabling the extension

After compiling and moving the extension into the correct directory, you can enable the extension by adding the following line to your php.ini file:

extension=libphp-scrypt.so

Change .so to .dll for Windows or .dylib for macOS.

Usage

Using the scrypt extension is easy, there is only one function in this extension the usage is as follows:

<?php
/**
* @param $password The string you want to hash (required)
* @param $salt The salt you want to use (required)
* @param $cpu_difficulty The CPU difficulty [default=32768]
* @param $memory_difficulty The memory difficulty [default=8]
* @param $parallel_difficulty The parallel difficulty [default=1]
* @param $len The length of the generated hash [default=8]
**/

$hash = \scrypt("password", "salt", 32768, 8, 1, 64);
\var_dump("Your hash is " . $hash);

Authors

Bradley Schofield

• https://github.com/pineappleionic

Matej Bačo

• https://github.com/meldiron

Eldad Fux

• https://github.com/eldadfux

Special Thanks

• davidcole1340 - For developing the ext-php-rs bindings used for this project.

Contributing

All code contributions - including those of people having commit access - must go through a pull request and approved by a core developer before being merged. This is to ensure proper review of all the code.

We truly ❤️ pull requests! If you wish to help, you can learn more about how you can contribute to this project in the contribution guide.

Copyright and license

The MIT License (MIT) http://www.opensource.org/licenses/mit-license.php