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from typing import Any, Tuple, IO
import ipaddress
import tempfile
import logging
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
from mgr_util import verify_tls_files
from orchestrator import OrchestratorError
logger = logging.getLogger(__name__)
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: str) -> 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)
root_builder = root_builder.add_extension(
x509.SubjectAlternativeName(
[x509.IPAddress(ipaddress.ip_address(addr))]
),
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, host: str, addr: str) -> Tuple[str, str]:
have_ip = True
try:
ip = x509.IPAddress(ipaddress.ip_address(addr))
except Exception:
have_ip = 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, addr), ]))
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)
if have_ip:
builder = builder.add_extension(
x509.SubjectAlternativeName(
[ip, x509.DNSName(host)]
),
critical=False
)
else:
builder = builder.add_extension(
x509.SubjectAlternativeName(
[x509.DNSName(host)]
),
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 generate_cert_files(self, host: str, addr: str) -> Tuple[str, str]:
cert, key = self.generate_cert(host, addr)
self.cert_file = tempfile.NamedTemporaryFile()
self.cert_file.write(cert.encode('utf-8'))
self.cert_file.flush() # cert_tmp must not be gc'ed
self.key_file = tempfile.NamedTemporaryFile()
self.key_file.write(key.encode('utf-8'))
self.key_file.flush() # pkey_tmp must not be gc'ed
verify_tls_files(self.cert_file.name, self.key_file.name)
return self.cert_file.name, self.key_file.name
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 OrchestratorError('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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