Development Status
- 5 - Production/Stable
License
- OSI Approved :: BSD License
- Public Domain
Intended Audience
- Developers
Operating System
- Unix
- Microsoft :: Windows
- MacOS :: MacOS X
Topic
- Security :: Cryptography
Programming Language
- Python :: 2
- Python :: 2.7
- Python :: 3
- Python :: 3.7
- Python :: 3.8
- Python :: 3.9
- Python :: 3.10
- Python :: 3.11
- Python :: 3.12
- Python :: 3.13
PyCryptodome is a self-contained Python package of low-level cryptographic primitives.
It supports Python 2.7, Python 3.7 and newer, and PyPy.
You can install it with:
pip install pycryptodome
All modules are installed under the Crypto package.
Check the pycryptodomex project for the equivalent library that works under the Cryptodome package.
PyCryptodome is a fork of PyCrypto. It brings several enhancements with respect to the last official version of PyCrypto (2.6.1), for instance:
Authenticated encryption modes (GCM, CCM, EAX, SIV, OCB, KW, KWP)
Hybrid Public Key Encryption (HPKE)
Accelerated AES on Intel platforms via AES-NI
First class support for PyPy
Elliptic curves cryptography (NIST P-curves; Ed25519, Ed448, Curve25519)
Better and more compact API (nonce and iv attributes for ciphers, automatic generation of random nonces and IVs, simplified CTR cipher mode, and more)
SHA-3 (including SHAKE XOFs) and BLAKE2 hash algorithms
Salsa20 and ChaCha20 stream ciphers
scrypt and HKDF
Deterministic (EC)DSA and EdDSA
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
Cleaner RSA and DSA key generation (largely based on FIPS 186-4)
Major clean ups and simplification of the code base
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.
For more information, see the homepage.
All the code can be downloaded from GitHub.