shacrypt provides cross-platform support for SHA-256 crypt and SHA-512 crypt in Node.js. It does not use the Node.js crypto API. Instead, it is implemented as a Node.js addon that wraps around the C implementation programmed by Ulrich Drepper. This provides significantly increased performance.
shacrypt provides two functions
sha512crypt() that can be used both synchronously and asynchronously via callbacks.
Asynchronous mode is especially useful in that computation is performed in Node.js's libuv thread pool. This avoids blocking the event loop which results in better app responsiveness. As per Node.js convention, the callback function is provided as the final argument with the signature
npm install @vlasky/shacrypt
NOTE: You will need to have C++ build tools installed on your system to successfully install the package. If you are running under Windows, you can download Microsoft's Build Tools for Visual Studio 2017.
var shacrypt = require('shacrypt');
Generate password hash:
var hash = shacrypt.sha256crypt('super password'); // hash = $5$rounds=5000$3a1afb28e54a0391$0d6RupbpABtxCaH8WWOemYwEcToDVZXX/tHpIy6O1U3
console.log(hash == shacrypt.sha256crypt('super password', hash); // true
Specify number of rounds (default is 5000):
var hash = shacrypt.sha256crypt('super password', 10000); // hash = $5$rounds=10000$b2c0a3ef466b2ec7$poVvVeQAQSE.yec0LBFddzQ9kZ4UxzA5VtsZQShAyt8
Provide your own SALT:
var hash = shacrypt.sha256crypt('super password', 'my-salt'); // or with iterations=10000 var hash = shacrypt.sha256crypt('super password', 'my-salt', 10000);
- Vlad Lasky https://github.com/vlasky
- Oleksiy Krivoshey https://github.com/oleksiyk
- Original C code by Ulrich Drepper: http://www.akkadia.org/drepper/SHA-crypt.txt
Copyright (c) 2013-2015 Oleksiy Krivoshey.
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