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Move CertificateBundle into Sapphire
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| # This Source Code Form is subject to the terms of the Mozilla Public | ||
| # License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| # file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
| from datetime import datetime, timedelta, timezone | ||
| from ipaddress import IPv4Address | ||
| from logging import getLogger | ||
| from os import getpid | ||
| from pathlib import Path | ||
| from shutil import rmtree | ||
| from tempfile import mkdtemp | ||
| from typing import Dict, Optional | ||
|
|
||
| from cryptography import x509 | ||
| from cryptography.hazmat.backends import default_backend | ||
| from cryptography.hazmat.primitives import hashes, serialization | ||
| from cryptography.hazmat.primitives.asymmetric.rsa import generate_private_key | ||
| from cryptography.x509.oid import NameOID | ||
|
|
||
| LOG = getLogger(__name__) | ||
|
|
||
|
|
||
| def generate_certificates(cert_dir: Path) -> Dict[str, Path]: | ||
| """Generate a root CA and host certificate. | ||
| Credit to https://stackoverflow.com/a/56292132 | ||
| """ | ||
| root_key = generate_private_key( | ||
| public_exponent=65537, | ||
| key_size=2048, | ||
| backend=default_backend(), | ||
| ) | ||
| root_sub = x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, "Grizzly Root CA")]) | ||
| root_cert = ( | ||
| x509.CertificateBuilder() | ||
| .subject_name(root_sub) | ||
| .issuer_name(root_sub) | ||
| .public_key(root_key.public_key()) | ||
| .add_extension(x509.BasicConstraints(ca=True, path_length=None), critical=True) | ||
| .serial_number(x509.random_serial_number()) | ||
| .not_valid_before(datetime.now(timezone.utc)) | ||
| .not_valid_after(datetime.now(timezone.utc) + timedelta(days=30)) | ||
| .sign(root_key, hashes.SHA256(), default_backend()) | ||
| ) | ||
|
|
||
| # Now we want to generate a cert from that root | ||
| host_key = generate_private_key( | ||
| public_exponent=65537, | ||
| key_size=2048, | ||
| backend=default_backend(), | ||
| ) | ||
| host_sub = x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, "Grizzly Test Cert")]) | ||
| host_cert = ( | ||
| x509.CertificateBuilder() | ||
| .subject_name(host_sub) | ||
| .issuer_name(root_cert.issuer) | ||
| .public_key(host_key.public_key()) | ||
| .serial_number(x509.random_serial_number()) | ||
| .not_valid_before(datetime.now(timezone.utc)) | ||
| .not_valid_after(datetime.now(timezone.utc) + timedelta(days=30)) | ||
| .add_extension( | ||
| x509.SubjectAlternativeName( | ||
| [ | ||
| x509.DNSName("localhost"), | ||
| x509.IPAddress(IPv4Address("127.0.0.1")), | ||
| ] | ||
| ), | ||
| critical=False, | ||
| ) | ||
| .sign(root_key, hashes.SHA256(), default_backend()) | ||
| ) | ||
|
|
||
| root_file = cert_dir / "root.pem" | ||
| root_file.write_bytes(root_cert.public_bytes(serialization.Encoding.PEM)) | ||
| cert_file = cert_dir / "host.pem" | ||
| cert_file.write_bytes(host_cert.public_bytes(serialization.Encoding.PEM)) | ||
| key_file = cert_dir / "host.key" | ||
| key_file.write_bytes( | ||
| host_key.private_bytes( | ||
| encoding=serialization.Encoding.PEM, | ||
| format=serialization.PrivateFormat.TraditionalOpenSSL, | ||
| encryption_algorithm=serialization.NoEncryption(), | ||
| ) | ||
| ) | ||
|
|
||
| return {"root": root_file, "host": cert_file, "key": key_file} | ||
|
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||
|
|
||
| class CertificateBundle: | ||
| """Contains root CA, host CA and private key files.""" | ||
|
|
||
| def __init__(self, path: Path, root: Path, host: Path, key: Path) -> None: | ||
| self._base = path | ||
| self.root = root | ||
| self.host = host | ||
| self.key = key | ||
|
|
||
| @classmethod | ||
| def create(cls, path: Optional[Path] = None) -> "CertificateBundle": | ||
| """Create certificate files. | ||
| Args: | ||
| path: Location to store generated files. | ||
| Returns: | ||
| CertificateBundle | ||
| """ | ||
| if path is None: | ||
| path = Path(mkdtemp(prefix=f"sapphire_certs_{getpid()}_")) | ||
| certs = generate_certificates(path) | ||
| return cls(path, certs["root"], certs["host"], certs["key"]) | ||
|
|
||
| def cleanup(self) -> None: | ||
| """Remove certificate files. | ||
| Args: | ||
| None | ||
| Returns: | ||
| None | ||
| """ | ||
| LOG.debug("removing certificate path (%s)", self._base) | ||
| rmtree(self._base, ignore_errors=True) |
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