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from typing import Any, Tuple, IO, List, Union, Optional
import ipaddress
from datetime import datetime, timedelta
from cryptography import x509
from cryptography.x509.oid import NameOID
from cryptography.hazmat.primitives.asymmetric import rsa
from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.backends import default_backend
class SSLConfigException(Exception):
pass
class SSLCerts:
def __init__(self) -> None:
self.root_cert: Any
self.root_key: Any
self.key_file: IO[bytes]
self.cert_file: IO[bytes]
def generate_root_cert(
self,
addr: Optional[str] = None,
custom_san_list: Optional[List[str]] = None
) -> Tuple[str, str]:
self.root_key = rsa.generate_private_key(
public_exponent=65537, key_size=4096, backend=default_backend())
root_public_key = self.root_key.public_key()
root_builder = x509.CertificateBuilder()
root_builder = root_builder.subject_name(x509.Name([
x509.NameAttribute(NameOID.COMMON_NAME, u'cephadm-root'),
]))
root_builder = root_builder.issuer_name(x509.Name([
x509.NameAttribute(NameOID.COMMON_NAME, u'cephadm-root'),
]))
root_builder = root_builder.not_valid_before(datetime.now())
root_builder = root_builder.not_valid_after(datetime.now() + timedelta(days=(365 * 10 + 3)))
root_builder = root_builder.serial_number(x509.random_serial_number())
root_builder = root_builder.public_key(root_public_key)
san_list: List[x509.GeneralName] = []
if addr:
san_list.extend([x509.IPAddress(ipaddress.ip_address(addr))])
if custom_san_list:
san_list.extend([x509.DNSName(n) for n in custom_san_list])
root_builder = root_builder.add_extension(
x509.SubjectAlternativeName(
san_list
),
critical=False
)
root_builder = root_builder.add_extension(
x509.BasicConstraints(ca=True, path_length=None), critical=True,
)
self.root_cert = root_builder.sign(
private_key=self.root_key, algorithm=hashes.SHA256(), backend=default_backend()
)
cert_str = self.root_cert.public_bytes(encoding=serialization.Encoding.PEM).decode('utf-8')
key_str = self.root_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.TraditionalOpenSSL,
encryption_algorithm=serialization.NoEncryption()
).decode('utf-8')
return (cert_str, key_str)
def generate_cert(
self,
_hosts: Union[str, List[str]],
_addrs: Union[str, List[str]],
custom_san_list: Optional[List[str]] = None,
) -> Tuple[str, str]:
addrs = [_addrs] if isinstance(_addrs, str) else _addrs
hosts = [_hosts] if isinstance(_hosts, str) else _hosts
valid_ips = True
try:
ips = [x509.IPAddress(ipaddress.ip_address(addr)) for addr in addrs]
except Exception:
valid_ips = False
private_key = rsa.generate_private_key(
public_exponent=65537, key_size=4096, backend=default_backend())
public_key = private_key.public_key()
builder = x509.CertificateBuilder()
builder = builder.subject_name(x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, addrs[0]), ]))
builder = builder.issuer_name(
x509.Name([x509.NameAttribute(NameOID.COMMON_NAME, u'cephadm-root'), ]))
builder = builder.not_valid_before(datetime.now())
builder = builder.not_valid_after(datetime.now() + timedelta(days=(365 * 10 + 3)))
builder = builder.serial_number(x509.random_serial_number())
builder = builder.public_key(public_key)
san_list: List[x509.GeneralName] = [x509.DNSName(host) for host in hosts]
if valid_ips:
san_list.extend(ips)
if custom_san_list:
san_list.extend([x509.DNSName(n) for n in custom_san_list])
builder = builder.add_extension(
x509.SubjectAlternativeName(
san_list
),
critical=False
)
builder = builder.add_extension(x509.BasicConstraints(
ca=False, path_length=None), critical=True,)
cert = builder.sign(private_key=self.root_key,
algorithm=hashes.SHA256(), backend=default_backend())
cert_str = cert.public_bytes(encoding=serialization.Encoding.PEM).decode('utf-8')
key_str = private_key.private_bytes(encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.TraditionalOpenSSL,
encryption_algorithm=serialization.NoEncryption()
).decode('utf-8')
return (cert_str, key_str)
def get_root_cert(self) -> str:
try:
return self.root_cert.public_bytes(encoding=serialization.Encoding.PEM).decode('utf-8')
except AttributeError:
return ''
def get_root_key(self) -> str:
try:
return self.root_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.TraditionalOpenSSL,
encryption_algorithm=serialization.NoEncryption(),
).decode('utf-8')
except AttributeError:
return ''
def load_root_credentials(self, cert: str, priv_key: str) -> None:
given_cert = x509.load_pem_x509_certificate(cert.encode('utf-8'), backend=default_backend())
tz = given_cert.not_valid_after.tzinfo
if datetime.now(tz) >= given_cert.not_valid_after:
raise SSLConfigException('Given cert is expired')
self.root_cert = given_cert
self.root_key = serialization.load_pem_private_key(
data=priv_key.encode('utf-8'), backend=default_backend(), password=None)
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