Introduction

PyCryptodome is a self-contained, public domain Python package of low-level cryptographic primitives.

It supports Python 2.4 or newer, all Python 3 versions and PyPy.

All the code can be downloaded from GitHub.

PyCryptodome is not a wrapper to a separate C library like OpenSSL. To the largest possible extent, algorithms are implemented in pure Python. Only the pieces that are extremely critical to performance (e.g. block ciphers) are implemented as C extensions.

News

• 29 Oct 2015 (NEW). Release 3.3.
• 9 Sep 2015. Minor release 3.2.1.
• 6 Sep 2015. Release 3.2.
• 15 Mar 2015. Release 3.1.
• 24 Jun 2014. Release 3.0.

PyCryptodome and PyCrypto

PyCryptodome is a fork of the PyCrypto project.

It brings the following enhancements with respect to the last official version of PyCrypto (2.6.1):

• Authenticated encryption modes (GCM, CCM, EAX, SIV, OCB)
• Accelerated AES on Intel platforms via AES-NI
• First class support for PyPy
• SHA-3 (including SHAKE XOFs) and BLAKE2 hash algorithms
• Salsa20 stream cipher
• scrypt and HKDF
• Deterministic DSA
• Password-protected PKCS#8 key containers
• Shamir’s Secret Sharing scheme
• Random numbers get sourced directly from the OS (and not from a CSPRNG in userspace)
• Simplified install process, including better support for Windows
• FIPS 186-4 compliant RSA key generation
• Major clean ups and simplification of the code base

The fork took place because of the very bad state PyCrypto was in, and the little maintanance it was receiving.