pki-tools 0.0.32

PKI tools for e.g. checking certificate CRL/OCSP revocation

PKI tools exposes a high level cryptography API and wrappers for e.g.:

• Loading certificates from PEM strings/files/cryptography object into a pydantic model including all x509 v3 extensions
• Checking revocation of certificates using OCSP with CRL fallback
• Creating Certs, CSR, CRL easy with pure pydantic objects to e.g. get a PEM file

Docs

Documentation is available at: https://pki-tools.fulder.dev

Quickstart

Install

pip install pki-tools

Usage

Loading from PEM

from pki_tools import Certificate, Chain, CertificateSigningRequest

cert_pem = """
-----BEGIN CERTIFICATE-----
<CERT_PEM_BYTES>
-----END CERTIFICATE-----
"""

issuer_cert_pem = """
-----BEGIN CERTIFICATE-----
<ISSUER_CERT_PEM_BYTES>
-----END CERTIFICATE-----
"""

csr_pem= """
-----BEGIN CERTIFICATE REQUEST-----
<CSR_PEM_BYTES>
-----END CERTIFICATE REQUEST-----
"""


cert = Certificate.from_pem_string(cert_pem)
chain = Chain.from_pem_string(issuer_cert_pem)
csr = CertificateSigningRequest.from_pem_string(csr_pem)

Checking revocation using OCSP with CRL fallback

The following example uses cert and chain from the loading examples above

from pki_tools import is_revoked

if is_revoked(cert, chain):
    print("Certificate Revoked!")

Creating

Self signed certificate

import datetime
from pki_tools import (
    Certificate,
    Name,
    Validity,
    RSAKeyPair,
    SignatureAlgorithm,
    HashAlgorithm,
    HashAlgorithmName,
)

name = Name(cn=["Cert CN"])

cert = Certificate(
    subject=name,
    issuer=name,
    validity=Validity(
        not_before=datetime.datetime.today(),
        not_after=datetime.datetime.today() + datetime.timedelta(days=1),
    ),
)

sha512_alg = SignatureAlgorithm(
    algorithm=HashAlgorithm(name=HashAlgorithmName.SHA512)
)

cert.sign(RSAKeyPair.generate(), sha512_alg)

print(cert.pem_string)

Create CSR

from pki_tools import (
  Name,
  HashAlgorithm,
  HashAlgorithmName,
  CertificateSigningRequest,
  SignatureAlgorithm,
  RSAKeyPair,
)

name = Name(cn=["Cert CN"])

csr = CertificateSigningRequest(subject=name)

sha512_alg = SignatureAlgorithm(
  algorithm=HashAlgorithm(name=HashAlgorithmName.SHA512)
)

csr.sign(RSAKeyPair.generate(), sha512_alg)

print(csr.pem_string)