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