asn1crypto

1.5.1 · active · verified Sat Mar 28

A fast, pure Python library for parsing and serializing ASN.1 structures, including private keys, public keys, certificates, and various PKCS standards. Current version: 1.5.1. Release cadence: irregular, with the latest release on March 15, 2022. ([pypi.org](https://pypi.org/project/asn1crypto/?utm_source=openai))

Warnings

breaking The 'x509' module was introduced in version 0.22.0. Ensure your version is up-to-date to use this module.
Fix: Upgrade to the latest version of asn1crypto.
gotcha When parsing certificates, ensure the input data is in DER format. PEM format requires base64 decoding before parsing.
Fix: Convert PEM to DER format before parsing or use appropriate methods to handle PEM format.

Install

pip install asn1crypto Install asn1crypto

Imports

x509
```
from asn1crypto import x509
```
Ensure correct import path to access X.509 certificate parsing and serialization.

Quickstart

A basic example demonstrating how to load, parse, and access details of an X.509 certificate using asn1crypto.

from asn1crypto import x509

# Load a certificate from a file
with open('certificate.pem', 'rb') as f:
    cert_data = f.read()

# Parse the certificate
cert = x509.Certificate.load(cert_data)

# Access certificate details
print(cert.subject.native)  # Print the subject of the certificate
print(cert.serial_number)   # Print the serial number of the certificate

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