PyNaCl is a Python binding to libsodium, which is a fork of the
Networking and Cryptography library. These libraries have a stated goal of
improving usability, security and speed. It supports Python 2.7 and 3.3+ as
well as PyPy 2.6+.
Installation
Linux
PyNaCl relies on libsodium, a portable C library. A copy is bundled
with PyNaCl so to install you can run:
$ pip install pynacl
If you’d prefer to use one provided by your distribution you can disable
the bundled copy during install by running:
$SODIUM_INSTALL=system pip install pynacl
Mac OS X & Windows
PyNaCl ships as a binary wheel on OS X and Windows so all dependencies
are included. Make sure you have an up-to-date pip and run:
$ pip install pynacl
Features
Digital signatures
Secret-key encryption
Public-key encryption
Changes
1.1.2 - 2017-03-31:
reorder link time library search path when using bundled
libsodium
1.1.1 - 2017-03-15:
Fixed a circular import bug in nacl.utils.
1.1.0 - 2017-03-14:
Dropped support for Python 2.6.
Added shared_key() method on Box.
You can now pass None to nonce when encrypting with Box or
SecretBox and it will automatically generate a random nonce.
Added support for siphash24.
Added support for blake2b.
Added support for scrypt.
Update libsodium to 1.0.11.
Default to the bundled libsodium when compiling.
All raised exceptions are defined mixing-in
nacl.exceptions.CryptoError
1.0.1:
Fix an issue with absolute paths that prevented the creation of wheels.
1.0:
PyNaCl has been ported to use the new APIs available in cffi 1.0+.
Due to this change we no longer support PyPy releases older than 2.6.
Python 3.2 support has been dropped.
Functions to convert between Ed25519 and Curve25519 keys have been added.
0.3.0:
The low-level API (nacl.c.*) has been changed to match the
upstream NaCl C/C++ conventions (as well as those of other NaCl bindings).
The order of arguments and return values has changed significantly. To
avoid silent failures, nacl.c has been removed, and replaced with
nacl.bindings (with the new argument ordering). If you have code which
calls these functions (e.g. nacl.c.crypto_box_keypair()), you must review
the new docstrings and update your code/imports to match the new
conventions.
