swarmauri_certs_x509verify 0.4.0.dev3

X.509 certificate verification service for Swarmauri

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Swarmauri Certs X509 Verify

An asynchronous X.509 certificate verification and parsing service implementing CertServiceBase for the Swarmauri ecosystem. The X509VerifyService works with PEM or DER encoded certificates to surface metadata and perform lightweight trust checks suitable for development and integration testing.

Features

• Async-first interface exposing verify_cert and parse_cert coroutines.
• Accepts PEM or DER encoded certificates without additional tooling.
• parse_cert extracts the serial number, issuer, subject, validity window, signature algorithm, Subject Alternative Names (SAN) and Extended Key Usage (EKU) values.
• verify_cert performs a timestamp check and one-hop signature validation against provided trust roots or intermediates.
• Designed for basic validation flows – revocation checking and complex path building are intentionally out of scope and reported as revocation_checked=False in the response.

Installation

Install the package with your preferred Python packaging tool:

pip install swarmauri_certs_x509verify

poetry add swarmauri_certs_x509verify

uv pip install swarmauri_certs_x509verify

Quick start

The example below issues an in-memory self-signed certificate, parses its metadata and verifies the certificate against itself as a trust root. Both coroutines are executed with asyncio.run for convenience in scripts and documentation. The resulting dictionary mirrors the values returned by the service at runtime.

# README example: verify and parse a development certificate
import asyncio
from datetime import datetime, timedelta, timezone
from typing import Any

from cryptography import x509
from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.primitives.asymmetric import ec
from cryptography.x509.oid import ExtendedKeyUsageOID, NameOID

from swarmauri_certs_x509verify import X509VerifyService


def issue_dev_certificate() -> bytes:
    private_key = ec.generate_private_key(ec.SECP256R1())
    subject = issuer = x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, "example.test")])
    now = datetime.now(timezone.utc)

    certificate = (
        x509.CertificateBuilder()
        .subject_name(subject)
        .issuer_name(issuer)
        .public_key(private_key.public_key())
        .serial_number(x509.random_serial_number())
        .not_valid_before(now - timedelta(minutes=1))
        .not_valid_after(now + timedelta(days=1))
        .add_extension(
            x509.SubjectAlternativeName([x509.DNSName("example.test")]),
            critical=False,
        )
        .add_extension(
            x509.ExtendedKeyUsage([ExtendedKeyUsageOID.SERVER_AUTH]),
            critical=False,
        )
        .sign(private_key=private_key, algorithm=hashes.SHA256())
    )

    return certificate.public_bytes(serialization.Encoding.PEM)


async def main() -> dict[str, dict[str, Any]]:
    certificate_pem = issue_dev_certificate()
    service = X509VerifyService()

    parsed = await service.parse_cert(certificate_pem)
    verification = await service.verify_cert(certificate_pem, trust_roots=[certificate_pem])

    return {"parsed": parsed, "verification": verification}


example_result = asyncio.run(main())
print(example_result["parsed"]["subject"])
print(example_result["verification"]["valid"])

example_result["verification"]["valid"] resolves to True when the certificate is valid for the supplied timestamp. If the time window fails or no matching trust root is provided, the service returns valid=False and the reason field is set to "invalid_chain_or_time".

Entry Point

The service registers under the swarmauri.certs entry point as X509VerifyService and under peagen.plugins.certs as x509verify.

Want to help?

If you want to contribute to swarmauri-sdk, read up on our guidelines for contributing that will help you get started.