from OpenSSL.crypto import load_certificate as _load_certificate, load_privatekey as _load_privatekey, \
dump_certificate as _dump_certificate, dump_privatekey as _dump_privatekey, \
dump_publickey as _dump_publickey, PKey as _PKey, X509 as _X509, X509Extension as _X509Extension, \
TYPE_RSA as _TYPE_RSA, FILETYPE_PEM as _FILETYPE_PEM
from os import makedirs as _makedirs, symlink as _symlink, unlink as _unlink, listdir as _listdir, environ as _environ
from os.path import join as _join, isdir as _isdir, isfile as _isfile, exists as _exists
from datetime import datetime as _datetime
from risotto.utils import RISOTTO_CONFIG as _RISOTTO_CONFIG, multi_function as _multi_function
_PKI_DIR = 'pki/x509'
_HERE = _environ['PWD']
@_multi_function
def get_chain(cn: str,
authority_cn: str,
authority_name: str,
hide: bool,
):
if hide:
return "XXXXX"
if not authority_cn or not authority_name:
return
return _gen_ca(cn,
authority_cn,
authority_name,
_HERE,
)
@_multi_function
def get_certificate(cn,
authority_name: str,
hide: bool,
authority_cn: str=None,
extra_domainnames: list=[],
type: str='server',
):
if hide:
return "XXXXX"
if isinstance(cn, list) and extra_domainnames:
raise Exception('cn cannot be a list with extra_domainnames set')
if not cn or authority_name is None:
if isinstance(cn, list):
return []
return
return _gen_cert(cn,
extra_domainnames,
authority_cn,
authority_name,
type,
'crt',
_HERE,
)
@_multi_function
def get_private_key(cn: str,
hide: bool,
authority_name: str=None,
authority_cn: str=None,
type: str='server',
):
if hide:
return "XXXXX"
if not cn:
if isinstance(cn, list):
return []
return
if authority_name is None:
if _has_pub(cn, _HERE):
return _gen_pub(cn,
'key',
_HERE,
)
if isinstance(cn, list):
return []
return
return _gen_cert(cn,
[],
authority_cn,
authority_name,
type,
'key',
_HERE,
)
def get_public_key(cn: str,
hide: bool,
):
if hide:
return "XXXXX"
if not cn:
return
return _gen_pub(cn,
'pub',
_HERE,
)
def _gen_key_pair():
key = _PKey()
key.generate_key(_TYPE_RSA, 4096)
return key
def __gen_cert(is_ca,
common_names,
root_dir_name,
validity_end_in_seconds,
key_file,
cert_file,
type=None,
ca_cert=None,
ca_key=None,
email_address=None,
country_name=None,
locality_name=None,
state_or_province_name=None,
organization_name=None,
organization_unit_name=None,
):
#can look at generated file using openssl:
#openssl x509 -inform pem -in selfsigned.crt -noout -text
# create a key pair
if _isfile(key_file):
with open(key_file) as fh:
filecontent = bytes(fh.read(), 'utf-8')
key = _load_privatekey(_FILETYPE_PEM, filecontent)
else:
key = _gen_key_pair()
cert = _X509()
cert.set_version(2)
cert.get_subject().C = country_name
cert.get_subject().ST = state_or_province_name
cert.get_subject().L = locality_name
cert.get_subject().O = organization_name
cert.get_subject().OU = organization_unit_name
cert.get_subject().CN = common_names[0]
cert.get_subject().emailAddress = email_address
cert_ext = []
if not is_ca:
cert_ext.append(_X509Extension(b'basicConstraints', False, b'CA:FALSE'))
cert_ext.append(_X509Extension(b'keyUsage', True, b'digitalSignature, keyEncipherment'))
cert_ext.append(_X509Extension(b'subjectAltName', False, ", ".join([f'DNS:{common_name}' for common_name in common_names]).encode('ascii')))
if type == 'server':
cert_ext.append(_X509Extension(b'extendedKeyUsage', True, b'serverAuth'))
else:
cert_ext.append(_X509Extension(b'extendedKeyUsage', True, b'clientAuth'))
else:
cert_ext.append(_X509Extension(b'basicConstraints', False, b'CA:TRUE'))
cert_ext.append(_X509Extension(b"keyUsage", True, b'keyCertSign, cRLSign'))
cert_ext.append(_X509Extension(b'subjectAltName', False, f'email:{email_address}'.encode()))
cert_ext.append(_X509Extension(b'subjectKeyIdentifier', False, b"hash", subject=cert))
cert.add_extensions(cert_ext)
sn_filename = _join(root_dir_name, 'serial_number')
if _isfile(sn_filename):
with open(sn_filename, 'r') as fh:
serial_number = int(fh.read().strip()) + 1
else:
serial_number = 0
cert.set_serial_number(serial_number)
with open(sn_filename, 'w') as fh:
fh.write(str(serial_number))
cert.gmtime_adj_notBefore(0)
cert.gmtime_adj_notAfter(validity_end_in_seconds)
if is_ca:
ca_cert = cert
ca_key = key
else:
with open(ca_cert) as fh:
filecontent = bytes(fh.read(), 'utf-8')
ca_cert = _load_certificate(_FILETYPE_PEM, filecontent)
with open(ca_key) as fh:
filecontent = bytes(fh.read(), 'utf-8')
ca_key = _load_privatekey(_FILETYPE_PEM, filecontent)
cert.set_issuer(ca_cert.get_subject())
cert.add_extensions([_X509Extension(b"authorityKeyIdentifier", False, b'keyid:always', issuer=ca_cert)])
cert.set_pubkey(key)
cert.sign(ca_key, "sha512")
with open(cert_file, "wt") as f:
f.write(_dump_certificate(_FILETYPE_PEM, cert).decode("utf-8"))
if not is_ca:
f.write(_dump_certificate(_FILETYPE_PEM, ca_cert).decode("utf-8"))
with open(key_file, "wt") as f:
f.write(_dump_privatekey(_FILETYPE_PEM, key).decode("utf-8"))
def _gen_ca(cn,
authority_dns,
authority_name,
base_dir,
):
authority_cn = authority_name + '+' + authority_dns
week_number = _datetime.now().isocalendar().week
root_dir_name = _join(base_dir, _PKI_DIR, authority_cn)
ca_dir_name = _join(root_dir_name, 'ca')
key_ca_name = _join(ca_dir_name, 'private.key')
cert_ca_name = f'certificate_{week_number}.crt'
cert_ca_filename = _join(ca_dir_name, cert_ca_name)
local_ca_dir_name = _join(root_dir_name, 'certificats', cn, 'ca')
if not _isfile(cert_ca_filename):
if not _isdir(ca_dir_name):
_makedirs(ca_dir_name)
__gen_cert(True,
[authority_cn],
root_dir_name,
10*24*60*60,
key_ca_name,
cert_ca_filename,
email_address=_RISOTTO_CONFIG['cert_authority']['email'],
country_name=_RISOTTO_CONFIG['cert_authority']['country'],
locality_name=_RISOTTO_CONFIG['cert_authority']['locality'],
state_or_province_name=_RISOTTO_CONFIG['cert_authority']['state'],
organization_name=_RISOTTO_CONFIG['cert_authority']['org_name'],
organization_unit_name=_RISOTTO_CONFIG['cert_authority']['org_unit_name'],
)
for filename in _listdir(ca_dir_name):
if not filename.endswith('.crt') or filename == cert_ca_name:
continue
_unlink(_join(ca_dir_name, filename))
with open(cert_ca_filename, 'r') as fh:
return fh.read().strip()
def gen_cert_iter(cn,
extra_domainnames,
authority_cn,
authority_name,
type,
base_dir,
root_cert_dir_name,
):
week_number = _datetime.now().isocalendar().week
root_dir_name = _join(base_dir, _PKI_DIR, authority_cn)
ca_dir_name = _join(root_dir_name, 'ca')
key_ca_name = _join(ca_dir_name, 'private.key')
certificate_name = f'certificate_{week_number}.crt'
cert_ca_name = _join(ca_dir_name, certificate_name)
cert_ca_external_name = _join(root_cert_dir_name, 'ca', certificate_name)
dir_name = _join(root_cert_dir_name, type)
key_name = _join(dir_name, f'private.key')
cert_name = _join(dir_name, certificate_name)
external = False
if _isfile(cert_ca_external_name):
external = True
elif not _isfile(cert_ca_name):
raise Exception(f'cannot find CA file "{cert_ca_name}" for "{cn}"')
if not _isfile(cert_name):
if external:
raise Exception(f"cannot find CA private key (\"{authority_cn}\") to sign certificat for \"{cn}\" ({key_ca_name}), is it sign with external authority (like Let's Encrypt certification)?")
if not _isdir(dir_name):
_makedirs(dir_name)
common_names = [cn]
common_names.extend(extra_domainnames)
__gen_cert(False,
common_names,
root_dir_name,
10*24*60*60,
key_name,
cert_name,
ca_cert=cert_ca_name,
ca_key=key_ca_name,
type=type,
email_address=_RISOTTO_CONFIG['cert_authority']['email'],
country_name=_RISOTTO_CONFIG['cert_authority']['country'],
locality_name=_RISOTTO_CONFIG['cert_authority']['locality'],
state_or_province_name=_RISOTTO_CONFIG['cert_authority']['state'],
organization_name=_RISOTTO_CONFIG['cert_authority']['org_name'],
organization_unit_name=_RISOTTO_CONFIG['cert_authority']['org_unit_name'],
)
for extra in extra_domainnames:
extra_dir_name = _join(base_dir, _PKI_DIR, authority_name + '+' + extra)
if not _exists(extra_dir_name):
_symlink(root_dir_name, extra_dir_name)
for filename in _listdir(dir_name):
if not filename.endswith('.crt') or filename == certificate_name:
continue
_unlink(_join(dir_name, filename))
for extra in extra_domainnames:
extra_dir_name = _join(base_dir, _PKI_DIR, authority_name + '+' + extra)
if not _exists(extra_dir_name):
raise Exception(f'file {extra_dir_name} not already exists that means subjectAltName is not set in certificat, please remove {cert_name}')
return cert_name
def _gen_cert(cn,
extra_domainnames,
authority_cn,
authority_name,
type,
file_type,
base_dir,
):
if '.' in authority_name:
raise Exception(f'dot is not allowed in authority_name "{authority_name}"')
if type == 'server' and authority_cn is None:
authority_cn = cn
if authority_cn is None:
raise Exception(f'authority_cn is mandatory when authority type is client')
if extra_domainnames is None:
extra_domainnames = []
auth_cn = authority_name + '+' + authority_cn
dir_name = _join(base_dir, _PKI_DIR, auth_cn, 'certificats', cn)
if file_type == 'crt':
filename = gen_cert_iter(cn,
extra_domainnames,
auth_cn,
authority_name,
type,
base_dir,
dir_name,
)
else:
filename = _join(dir_name, type, f'private.key')
if not _isfile(filename):
raise Exception(f'cannot find {filename}, you must use get_certificate before get_private_key')
with open(filename, 'r') as fh:
return fh.read().strip()
def _has_pub(cn,
base_dir,
):
dir_name = _join(base_dir, _PKI_DIR, 'public', cn)
cert_name = _join(dir_name, f'public.pub')
return _isfile(cert_name)
def _gen_pub(cn,
file_type,
base_dir,
):
dir_name = _join(base_dir, _PKI_DIR, 'public', cn)
key_name = _join(dir_name, f'private.key')
if file_type == 'pub':
pub_name = _join(dir_name, f'public.pub')
if not _isfile(pub_name):
if not _isdir(dir_name):
_makedirs(dir_name)
key = _gen_key_pair()
with open(pub_name, "wt") as f:
f.write(_dump_publickey(_FILETYPE_PEM, key).decode("utf-8"))
with open(key_name, "wt") as f:
f.write(_dump_privatekey(_FILETYPE_PEM, key).decode("utf-8"))
filename = pub_name
else:
filename = key_name
with open(filename, 'r') as fh:
return fh.read().strip()