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import os
from . import errors
class TLSConfig:
"""
TLS configuration.
Args:
client_cert (tuple of str): Path to client cert, path to client key.
ca_cert (str): Path to CA cert file.
verify (bool or str): This can be a bool or a path to a CA cert
file to verify against. If ``True``, verify using ca_cert;
if ``False`` or not specified, do not verify.
"""
cert = None
ca_cert = None
verify = None
def __init__(self, client_cert=None, ca_cert=None, verify=None):
# Argument compatibility/mapping with
# https://docs.docker.com/engine/articles/https/
# This diverges from the Docker CLI in that users can specify 'tls'
# here, but also disable any public/default CA pool verification by
# leaving verify=False
# "client_cert" must have both or neither cert/key files. In
# either case, Alert the user when both are expected, but any are
# missing.
if client_cert:
try:
tls_cert, tls_key = client_cert
except ValueError:
raise errors.TLSParameterError(
'client_cert must be a tuple of'
' (client certificate, key file)'
) from None
if not (tls_cert and tls_key) or (not os.path.isfile(tls_cert) or
not os.path.isfile(tls_key)):
raise errors.TLSParameterError(
'Path to a certificate and key files must be provided'
' through the client_cert param'
)
self.cert = (tls_cert, tls_key)
# If verify is set, make sure the cert exists
self.verify = verify
self.ca_cert = ca_cert
if self.verify and self.ca_cert and not os.path.isfile(self.ca_cert):
raise errors.TLSParameterError(
'Invalid CA certificate provided for `ca_cert`.'
)
def configure_client(self, client):
"""
Configure a client with these TLS options.
"""
if self.verify and self.ca_cert:
client.verify = self.ca_cert
else:
client.verify = self.verify
if self.cert:
client.cert = self.cert
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