219 lines
6.3 KiB
Python
219 lines
6.3 KiB
Python
#!/usr/bin/env python3
|
|
|
|
import base64
|
|
import datetime
|
|
|
|
from cryptography.hazmat.backends import default_backend
|
|
from cryptography.hazmat.primitives import serialization
|
|
from cryptography import x509
|
|
from cryptography.x509.oid import NameOID
|
|
from cryptography.x509.oid import ExtensionOID
|
|
from cryptography.hazmat.primitives import hashes
|
|
from cryptography.hazmat.primitives.asymmetric import padding
|
|
|
|
from conf import TOKEN
|
|
|
|
|
|
class SATCertificate(object):
|
|
|
|
def __init__(self, cer):
|
|
self._error = ''
|
|
self._init_values()
|
|
self._get_data_cer(cer)
|
|
|
|
def _init_values(self):
|
|
self._rfc = ''
|
|
self._serial_number_int = 0
|
|
self._serial_number_str = ''
|
|
self._not_before = None
|
|
self._not_after = None
|
|
self._is_fiel = False
|
|
self._are_couple = False
|
|
self._is_valid_time = False
|
|
self._cer_pem = ''
|
|
self._cer_txt = ''
|
|
self._key = b''
|
|
self._key_enc = b''
|
|
self._key_pem = b''
|
|
self._cer_modulus = 0
|
|
self._key_modulus = 0
|
|
self._issuer = ''
|
|
return
|
|
|
|
def __str__(self):
|
|
msg = '\n\tRFC: {}\n'.format(self.rfc)
|
|
msg += '\tNo de Serie: {}\n'.format(self.serial_number_str)
|
|
msg += '\tVálido desde: {}\n'.format(self.not_before)
|
|
msg += '\tVálido hasta: {}\n'.format(self.not_after)
|
|
msg += '\tEs vigente: {}\n'.format(self.is_valid_time)
|
|
msg += '\tSon pareja: {}\n'.format(self.are_couple)
|
|
msg += '\tEs FIEL: {}\n'.format(self.is_fiel)
|
|
return msg
|
|
|
|
def __bool__(self):
|
|
return self.is_valid
|
|
|
|
def _get_data_cer(self, cer):
|
|
obj = x509.load_der_x509_certificate(cer, default_backend())
|
|
self._rfc = obj.subject.get_attributes_for_oid(
|
|
NameOID.X500_UNIQUE_IDENTIFIER)[0].value.split(' ')[0]
|
|
self._serial_number_int = obj.serial_number
|
|
self._serial_number_str = f'{obj.serial_number:x}'[1::2]
|
|
self._not_before = obj.not_valid_before
|
|
self._not_after = obj.not_valid_after
|
|
self._issuer = ','.join([i.rfc4514_string() for i in obj.issuer])
|
|
|
|
now = datetime.datetime.utcnow()
|
|
self._is_valid_time = (now > self.not_before) and (now < self.not_after)
|
|
if not self._is_valid_time:
|
|
msg = 'El certificado no es vigente'
|
|
self._error = msg
|
|
|
|
self._is_fiel = obj.extensions.get_extension_for_oid(
|
|
ExtensionOID.KEY_USAGE).value.key_agreement
|
|
|
|
self._cer_pem = obj.public_bytes(serialization.Encoding.PEM).decode()
|
|
self._cer_txt = ''.join(self._cer_pem.split('\n')[1:-2])
|
|
self._cer_modulus = obj.public_key().public_numbers().n
|
|
|
|
return
|
|
|
|
def _get_hash(self):
|
|
digest = hashes.Hash(hashes.SHA512(), default_backend())
|
|
digest.update(self._rfc.encode())
|
|
digest.update(self._serial_number_str.encode())
|
|
digest.update(TOKEN.encode())
|
|
return digest.finalize()
|
|
|
|
# ~ def _get_key_pem(self):
|
|
# ~ obj = self._get_key('')
|
|
# ~ key_pem = obj.private_bytes(
|
|
# ~ encoding=serialization.Encoding.PEM,
|
|
# ~ format=serialization.PrivateFormat.PKCS8,
|
|
# ~ encryption_algorithm=serialization.NoEncryption()
|
|
# ~ )
|
|
# ~ return key_pem
|
|
|
|
# ~ def _sign_with_pem(self, data, name_hash):
|
|
# ~ if name_hash == 'sha256':
|
|
# ~ type_hash = hashes.SHA256()
|
|
# ~ elif name_hash == 'sha1':
|
|
# ~ type_hash = hashes.SHA1()
|
|
|
|
# ~ firma = self._key_pem.sign(data, padding.PKCS1v15(), type_hash)
|
|
# ~ return base64.b64encode(firma).decode()
|
|
|
|
@property
|
|
def rfc(self):
|
|
return self._rfc
|
|
|
|
@property
|
|
def serial_number_str(self):
|
|
return self._serial_number_str
|
|
|
|
@property
|
|
def serial_number_int(self):
|
|
return self._serial_number_int
|
|
|
|
@property
|
|
def not_before(self):
|
|
return self._not_before
|
|
|
|
@property
|
|
def not_after(self):
|
|
return self._not_after
|
|
|
|
@property
|
|
def is_fiel(self):
|
|
return self._is_fiel
|
|
|
|
@property
|
|
def are_couple(self):
|
|
return self._are_couple
|
|
|
|
@property
|
|
def is_valid(self):
|
|
return not bool(self.error)
|
|
|
|
@property
|
|
def is_valid_time(self):
|
|
return self._is_valid_time
|
|
|
|
@property
|
|
def cer_pem(self):
|
|
return self._cer_pem.encode()
|
|
|
|
@property
|
|
def cer_txt(self):
|
|
return self._cer_txt
|
|
|
|
@property
|
|
def key_pem(self):
|
|
return self._key_pem
|
|
@key_pem.setter
|
|
def key_pem(self, value):
|
|
self._key_pem = value
|
|
|
|
@property
|
|
def key_enc(self):
|
|
return self._key_enc
|
|
|
|
@property
|
|
def issuer(self):
|
|
return self._issuer
|
|
|
|
@property
|
|
def error(self):
|
|
return self._error
|
|
|
|
@property
|
|
def key(self):
|
|
return self._key
|
|
@key.setter
|
|
def key(self, value):
|
|
self._key = value
|
|
|
|
def validate_key(self, key, password):
|
|
try:
|
|
obj = serialization.load_der_private_key(
|
|
key, password.encode(), default_backend())
|
|
except ValueError:
|
|
msg = 'La contraseña es incorrecta'
|
|
self._error = msg
|
|
return
|
|
|
|
self._key_pem = obj.private_bytes(
|
|
encoding=serialization.Encoding.PEM,
|
|
format=serialization.PrivateFormat.PKCS8,
|
|
encryption_algorithm=serialization.NoEncryption()
|
|
)
|
|
|
|
new_pass = self._get_hash()
|
|
self._key_enc = obj.private_bytes(
|
|
encoding=serialization.Encoding.PEM,
|
|
format=serialization.PrivateFormat.PKCS8,
|
|
encryption_algorithm=serialization.BestAvailableEncryption(new_pass)
|
|
)
|
|
|
|
self._key_modulus = obj.public_key().public_numbers().n
|
|
self._are_couple = self._cer_modulus == self._key_modulus
|
|
if not self._are_couple:
|
|
msg = 'El CER y el KEY no son pareja'
|
|
self._error = msg
|
|
|
|
return
|
|
|
|
def sign(self, data, name_hash='sha256'):
|
|
if name_hash == 'sha256':
|
|
type_hash = hashes.SHA256()
|
|
elif name_hash == 'sha1':
|
|
type_hash = hashes.SHA1()
|
|
|
|
password = self._get_hash()
|
|
private_key = serialization.load_pem_private_key(
|
|
self._key, password=password, backend=default_backend())
|
|
sign = private_key.sign(data.encode(), padding.PKCS1v15(), type_hash)
|
|
del password
|
|
del private_key
|
|
return base64.b64encode(sign).decode()
|