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import os.path from cryptography.hazmat.primitives import serialization as crypto_serialization from cryptography.hazmat.primitives.serialization import load_pem_private_key from cryptography.hazmat.primitives.asymmetric import rsa from cryptography.hazmat.backends import default_backend as crypto_default_backend from cryptography import x509 from cryptography.x509.oid import NameOID from cryptography.hazmat.primitives import hashes import datetime import ipaddress class Cert(object): def __init__(self): self.server_key_usage = { "digital_signature": True, "key_encipherment": True, "key_cert_sign": False, "key_agreement": False, "content_commitment": False, "data_encipherment": False, "crl_sign": False, "encipher_only": False, "decipher_only": False, } self.client_key_usage = { "digital_signature": True, "key_encipherment": True, "key_cert_sign": False, "key_agreement": False, "content_commitment": False, "data_encipherment": False, "crl_sign": False, "encipher_only": False, "decipher_only": False, } self.ca_key_usage = { "digital_signature": True, "key_encipherment": True, "key_cert_sign": True, "key_agreement": False, "content_commitment": False, "data_encipherment": True, "crl_sign": True, "encipher_only": False, "decipher_only": False, } self.extended_key_usage = { "server_auth": x509.oid.ExtendedKeyUsageOID.SERVER_AUTH, "client_auth": x509.oid.ExtendedKeyUsageOID.CLIENT_AUTH, "code_signing": x509.oid.ExtendedKeyUsageOID.CODE_SIGNING, } self.ca = None self.ca_key = None self.ca_pub = None self.ca_cert = None self.ca_cert_pub = None def __create_rsa_key_pair(self): key = rsa.generate_private_key(backend=crypto_default_backend(), public_exponent=65537, key_size=2048) private = key.private_bytes( crypto_serialization.Encoding.PEM, crypto_serialization.PrivateFormat.PKCS8, crypto_serialization.NoEncryption() ) public = key.public_key().public_bytes( crypto_serialization.Encoding.PEM, crypto_serialization.PublicFormat.PKCS1 ) return key, private, public def __create_csr(self, pri_key, country_name='cn', province_name='beijing', locality_name='beijing', organization_name='360', common_name=None): csr = x509.CertificateSigningRequestBuilder().subject_name(x509.Name([ x509.NameAttribute(NameOID.COUNTRY_NAME, country_name), x509.NameAttribute(NameOID.STATE_OR_PROVINCE_NAME, province_name), x509.NameAttribute(NameOID.LOCALITY_NAME, locality_name), x509.NameAttribute(NameOID.ORGANIZATION_NAME, organization_name), #x509.NameAttribute(NameOID.COMMON_NAME, common_name), ])).sign(pri_key, hashes.SHA256()) public = csr.public_key().public_bytes(crypto_serialization.Encoding.PEM, crypto_serialization.PublicFormat.SubjectPublicKeyInfo) return csr, public def __ca_self_certificate(self, key, alt_name=[], extended_key_usage=[], expire_days=3650, country_name='cn', province_name='beijing', locality_name='beijing',organization_name='360', common_name='zeus'): subject = issuer = x509.Name([ x509.NameAttribute(NameOID.COUNTRY_NAME, country_name), x509.NameAttribute(NameOID.STATE_OR_PROVINCE_NAME, province_name), x509.NameAttribute(NameOID.LOCALITY_NAME, locality_name), x509.NameAttribute(NameOID.ORGANIZATION_NAME, organization_name), x509.NameAttribute(NameOID.COMMON_NAME, common_name), ]) cert = x509.CertificateBuilder().subject_name( subject ).issuer_name( issuer ).public_key( key.public_key() ).serial_number( x509.random_serial_number() ).not_valid_before( datetime.datetime.now() - datetime.timedelta(days=7) ).not_valid_after( datetime.datetime.now() + datetime.timedelta(days=expire_days) ).add_extension( x509.KeyUsage(**self.ca_key_usage), True ).add_extension( x509.BasicConstraints(ca=True, path_length=None), True, ).add_extension( x509.SubjectKeyIdentifier.from_public_key(self.ca.public_key()), False ).sign(key, hashes.SHA256()) return cert, cert.public_bytes(crypto_serialization.Encoding.PEM) def __client_sign_csr(self, csr, expire_days=3650, extended_key_usage=[], alt_name=None): cert = x509.CertificateBuilder().subject_name( csr.subject ).issuer_name( self.ca_cert.subject ).public_key( csr.public_key() ).serial_number( x509.random_serial_number() ).not_valid_before( datetime.datetime.now() - datetime.timedelta(days=7) ).not_valid_after( datetime.datetime.now() + datetime.timedelta(days=expire_days) ).add_extension( x509.KeyUsage(**self.client_key_usage), True ).add_extension( x509.ExtendedKeyUsage(extended_key_usage), False, ).add_extension( x509.BasicConstraints(ca=False, path_length=None), True, ).add_extension( x509.AuthorityKeyIdentifier.from_issuer_public_key(self.ca.public_key()), False, ) if alt_name: cert = cert.add_extension(x509.SubjectAlternativeName(alt_name), False) cert = cert.sign(self.ca, hashes.SHA256()) return cert.public_bytes(crypto_serialization.Encoding.PEM) def __server_sign_csr(self, csr, expire_days=3650, extended_key_usage=[], alt_name=None): cert = x509.CertificateBuilder().subject_name( csr.subject ).issuer_name( self.ca_cert.subject ).public_key( csr.public_key() ).serial_number( x509.random_serial_number() ).not_valid_before( datetime.datetime.now() - datetime.timedelta(days=7) ).not_valid_after( datetime.datetime.now() + datetime.timedelta(days=expire_days) ).add_extension( x509.KeyUsage(**self.server_key_usage), True ).add_extension( x509.ExtendedKeyUsage(extended_key_usage), False, ).add_extension( x509.BasicConstraints(ca=False, path_length=None), True, ).add_extension( x509.AuthorityKeyIdentifier.from_issuer_public_key(self.ca.public_key()), False, ).add_extension( x509.SubjectAlternativeName(alt_name), False ).sign(self.ca, hashes.SHA256()) return cert.public_bytes(crypto_serialization.Encoding.PEM) def get_rsa_pair(self): key, private, public = self.__create_rsa_key_pair() return private, public def load_ca_key_file(self, ca_key_path): ca_data = open(ca_key_path).read() key = load_pem_private_key(ca_data.encode(), password=None) private = key.private_bytes( crypto_serialization.Encoding.PEM, crypto_serialization.PrivateFormat.PKCS8, crypto_serialization.NoEncryption() ) public = key.public_key().public_bytes( crypto_serialization.Encoding.PEM, crypto_serialization.PublicFormat.PKCS1 ) self.ca = key self.ca_key = private self.ca_pub = public def load_ca_cert_file(self, ca_cert_path): cert_data = open(ca_cert_path).read() cert = x509.load_pem_x509_certificate(cert_data.encode(), crypto_default_backend()) self.ca_cert = cert self.ca_cert_pub = cert.public_bytes(crypto_serialization.Encoding.PEM) def create_new_ca(self, output=None, ident='ca'): self.ca, self.ca_key, self.ca_pub = self.__create_rsa_key_pair() self.ca_cert, self.ca_cert_pub = self.__ca_self_certificate(self.ca) if output: ca_key_file = os.path.join(output, ident + '.key') with open(ca_key_file, 'w') as f: f.write(self.ca_key.decode()) ca_crt_file = os.path.join(output, ident + '.crt') with open(ca_crt_file, 'w') as f: f.write(self.ca_cert_pub.decode()) def create_new_server(self, output=None, ident='server', alt_name_dns=[], alt_name_ipv4=[], alt_name_ipv6=[], expire_days=3650): alt_name = [] for i in alt_name_dns: alt_name.append(x509.DNSName(i)) for i in alt_name_ipv4: alt_name.append(x509.IPAddress(ipaddress.IPv4Address(i))) for i in alt_name_ipv6: alt_name.append(x509.IPAddress(ipaddress.IPv6Address(i))) if not alt_name: alt_name.append(x509.IPAddress(ipaddress.IPv4Address('127.0.0.1'))) server, server_key, server_pub = self.__create_rsa_key_pair() server_csr, server_csr_pub = self.__create_csr(server) extend_key_usage = [self.extended_key_usage["server_auth"], self.extended_key_usage["client_auth"]] server_cert = self.__server_sign_csr(server_csr, expire_days=expire_days, extended_key_usage=extend_key_usage, alt_name=alt_name) if output: server_key_file = os.path.join(output, ident + '.key') with open(server_key_file, 'w') as f: f.write(server_key.decode()) server_cert_file = os.path.join(output, ident + '.crt') with open(server_cert_file, 'w') as f: f.write(server_cert.decode()) def create_new_client(self, output=None, ident='client', alt_name_dns=[], alt_name_ipv4=[], alt_name_ipv6=[], expire_days=3650): # client alt_name = [] for i in alt_name_dns: alt_name.append(x509.DNSName(i)) for i in alt_name_ipv4: alt_name.append(x509.IPAddress(ipaddress.IPv4Address(i))) for i in alt_name_ipv6: alt_name.append(x509.IPAddress(ipaddress.IPv6Address(i))) client, client_key, client_pub = self.__create_rsa_key_pair() client_csr, client_csr_pub = self.__create_csr(client) extend_key_usage = [self.extended_key_usage["client_auth"]] client_cert = self.__client_sign_csr(client_csr, expire_days=expire_days, extended_key_usage=extend_key_usage, alt_name=alt_name) if output: client_key_file = os.path.join(output, ident + '.key') with open(client_key_file, 'w') as f: f.write(client_key.decode()) client_cert_file = os.path.join(output, ident + '.crt') with open(client_cert_file, 'w') as f: f.write(client_cert.decode()) |