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Create directories and set selinux context for certidude request

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This commit is contained in:
Lauri Võsandi 2017-03-26 17:40:39 +00:00
parent 77db728294
commit a663efd39e
1 changed files with 27 additions and 4 deletions
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31
certidude/helpers.py
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@ -17,10 +17,26 @@ from configparser import ConfigParser
from cryptography import x509
from cryptography.hazmat.backends import default_backend
def selinux_fixup(path):
"""
Fix OpenVPN credential store security context on Fedora
"""
if not os.path.exists("/sys/fs/selinux"):
return
cmd = "chcon", "--type=home_cert_t", path
subprocess.call(cmd)
def certidude_request_certificate(server, key_path, request_path, certificate_path, authority_path, revocations_path, common_name, autosign=False, wait=False, bundle=False, renew=False, insecure=False):
"""
Exchange CSR for certificate using Certidude HTTP API server
"""
# Create directories
for path in key_path, request_path, certificate_path, authority_path, revocations_path:
dir_path = os.path.dirname(path)
if not os.path.exists(dir_path):
os.makedirs(dir_path)
# Set up URL-s
request_params = set()
if autosign:
@ -52,6 +68,7 @@ def certidude_request_certificate(server, key_path, request_path, certificate_pa
with open(authority_partial, "w") as oh:
oh.write(r.content)
click.echo("Writing authority certificate to: %s" % authority_path)
selinux_fixup(authority_partial)
os.rename(authority_partial, authority_path)
# Fetch certificate revocation list
@ -67,6 +84,7 @@ def certidude_request_certificate(server, key_path, request_path, certificate_pa
else:
# TODO: Check monotonically increasing CRL number
click.echo("Certificate revocation list passed verification")
selinux_fixup(revocations_partial)
os.rename(revocations_partial, revocations_path)
# Check if we have been inserted into CRL
@ -143,13 +161,16 @@ def certidude_request_certificate(server, key_path, request_path, certificate_pa
# Sign & dump CSR
os.umask(0o022)
with open(request_path + ".part", "wb") as f:
request_partial = tempfile.mktemp(prefix=request_path + ".part")
with open(request_partial, "wb") as f:
f.write(csr.sign(key, hashes.SHA256(), default_backend()).public_bytes(serialization.Encoding.PEM))
click.echo("Writing private key to: %s" % key_path)
selinux_fixup(key_partial)
os.rename(key_partial, key_path)
click.echo("Writing certificate signing request to: %s" % request_path)
os.rename(request_path + ".part", request_path)
os.rename(request_partial, request_path)
# We have CSR now, save the paths to client.conf so we could:
# Update CRL, renew certificate, maybe something extra?
@ -229,7 +250,8 @@ def certidude_request_certificate(server, key_path, request_path, certificate_pa
raise ValueError("Failed to parse PEM: %s" % submission.text)
os.umask(0o022)
with open(certificate_path + ".part", "w") as fh:
certificate_partial = tempfile.mktemp(prefix=certificate_path + ".part")
with open(certificate_partial, "w") as fh:
# Dump certificate
fh.write(submission.text)
@ -239,7 +261,8 @@ def certidude_request_certificate(server, key_path, request_path, certificate_pa
fh.write(ch.read())
click.echo("Writing certificate to: %s" % certificate_path)
os.rename(certificate_path + ".part", certificate_path)
selinux_fixup(certificate_partial)
os.rename(certificate_partial, certificate_path)
# TODO: Validate fetched certificate against CA
# TODO: Check that recevied certificate CN and pubkey match