Flask-Argon2 is a Flask extension that provides Argon2 hashing utilities for your Flask app.
Install the extension with the following command:
$ pip install flask-argon2
To use the extension simply import the class wrapper and pass the Flask app object back to here. Do so like this:
from flask import Flask
from flask_argon2 import Argon2
app = Flask(__name__)
argon2 = Argon2(app)
When using an application factory this extension can be initialized by the init_app() function.
The following Flask Configs are automatically used by init_app():
| Variable Name | Description |
|---|---|
ARGON2_TIME_COST |
Defines the amount of computation realized and therefore the execution time, given in number of iterations. |
ARGON2_MEMORY_COST |
Defines the memory usage, given in kibibytes. |
ARGON2_PARALLELISM |
Defines the number of parallel threads (changes the resulting hash value). |
ARGON2_HASH_LENGTH |
Length of the hash in bytes. |
ARGON2_SALT_LENGTH |
Length of random salt to be generated for each password. |
ARGON2_ENCODING |
The Argon2 C library expects bytes. So if hash() or verify() are passed an unicode string, it will be encoded using this encoding. |
| The default values are the same as the argon2_cffi library. |
Two primary methods are now exposed by way of the argon2 object. Use them like so:
pw_hash = argon2.generate_password_hash('secret_password')
argon2.check_password_hash(pw_hash, 'secret_password')