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205 lines
6.0 KiB
205 lines
6.0 KiB
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import os
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import os.path
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import pickle
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import subprocess
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from paths import *
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from certificate import Certificate
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from request import UserSSHRequest, HostSSHRequest, HostSSLRequest
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__doc__= """
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Module of classes to handle certificate requests
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"""
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class Authority(object):
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request_allowed = []
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def __init__(self, ca_id, ca_dir = MANAGER_PATH):
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self.ca_id = ca_id
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self.ca_dir = ca_dir
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def __bool__(self):
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return os.path.exists(self.path)
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@property
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def path(self):
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return os.path.join(self.ca_dir, self.ca_id)
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def generate(self):
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"""
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Leave a dump of this class in the MANAGER_PATH
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"""
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pickled_path = os.path.join(MANAGER_PATH, 'pickled_cas', self.ca_id)
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with open(pickled_path, 'wb') as out:
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pickle.dump(self, out)
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def sign(self, request):
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raise NotImplementedError()
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def __repr__(self):
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return ( "%s %s" % ( self.__class__.__name__, self.ca_id ) )
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class SSHAuthority(Authority):
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request_allowed = [ UserSSHRequest, HostSSHRequest, ]
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key_algorithm = 'ed25519'
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user_validity = '+52w'
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host_validity = '+52w'
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def __init__(self, ca_id):
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ssh_ca_dir = os.path.join(MANAGER_PATH, 'ssh_cas')
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super(SSHAuthority, self).__init__(ca_id, ssh_ca_dir)
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def __bool__(self):
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"""
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For a SSH Authority we only need a private-public key couple,
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moreover we request to have the next serial number
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"""
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keys_couple_exist = os.path.exists(self.path) and os.path.exists(self.path + '.pub')
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serial_exist = os.path.exists(self.path + '.serial')
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return keys_couple_exist and serial_exist
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def generate(self):
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"""
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Generate a SSHAuthority if the files associated
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do not exists
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"""
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# check if the public key exists
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if not self:
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# let ssh-keygen do its job
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subprocess.check_output(['ssh-keygen',
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'-f', self.path,
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'-t', self.key_algorithm,
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'-C', self.name])
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# write the serial file with a value of
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# 0 for first certificate
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with open(self.path + '.serial', 'w') as stream:
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stream.write(str(0))
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super(SSHAuthority, self).generate()
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else:
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raise ValueError('A CA with the same id and type already exists')
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def sign(self, request):
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assert type(request) in self.request_allowed
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pub_key_path = request.destination
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cert_path = Certificate(request.req_id).path
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with open(self.path + '.serial', 'r') as stream:
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next_serial = int(stream.read())
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with open(self.path + '.serial', 'w') as stream:
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stream.write(str(next_serial + 1))
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with open(request.destination, 'w') as stream:
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stream.write(request.key_data)
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ca_private_key = self.path
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if type(request) == UserSSHRequest:
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login_names = [ request.user_name, ]
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if request.root_requested:
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login_names.append('root')
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subprocess.check_output(['ssh-keygen',
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'-s', ca_private_key,
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'-I', 'user_%s' % request.user_name,
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'-n', ','.join(login_names),
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'-V', self.user_validity,
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'-z', str(next_serial),
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pub_key_path])
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elif type(request) == HostSSHRequest:
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subprocess.check_output(['ssh-keygen',
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'-s', ca_private_key,
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'-I', 'host_%s' % request.host_name.replace('.', '_'),
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'-h',
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'-n', request.host_name,
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'-V', self.host_validity,
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'-z', str(next_serial),
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pub_key_path])
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return cert_path
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class SSLAuthority(Authority):
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request_allowed = [ HostSSLRequest, ]
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ca_key_algorithm = 'des3'
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key_length = '4096'
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key_algorithm = 'sha256'
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ca_validity = '365'
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cert_validity = '365'
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def __init__(self, ca_id):
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ssl_ca_dir = os.path.join(MANAGER_PATH, 'ssl_ca')
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super(SSLAuthority, self).__init__(ca_id, ssl_ca_dir)
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def generate(self):
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if os.path.exists(self.path):
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raise ValueError("A CA with the same id and type already exists")
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subprocess.check_output(['openssl',
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'genrsa',
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'-%s'%self.ca_key_algorithm,
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'-out', '%s'%(self.path),
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self.key_length])
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subprocess.check_output(['openssl',
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'req',
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'-new',
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'-x509',
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'-days', self.ca_validity,
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'-key', self.path,
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# '-extensions', 'v3_ca'
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'-out', "%s.pub"%self.path,
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# '-config', "%s.conf"%self.path
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])
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with open(self.path + '.serial', 'w') as stream:
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stream.write(str(0))
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def sign(self, request):
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OUTPUT_PATH
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assert type(request) in self.request_allowed
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pub_key_path = os.path.join(OUTPUT_PATH, request.req_id + '.pub')
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cert_path = os.path.join(OUTPUT_PATH, request.req_id + '-cert.pub')
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with open(self.path + '.serial', 'r') as stream:
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next_serial = int(stream.read())
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with open(self.path + '.serial', 'w') as stream:
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stream.write(str(next_serial + 1))
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with open(pub_key_path, 'w') as stream:
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stream.write(request.key_data)
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ca_private_key = self.path
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# openssl x509 -req -days 360 -in server.csr -CA ca.crt -CAkey ca.key -CAcreateserial -out server.crt # print()
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subprocess.check_output(['openssl',
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'x509',
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'-req',
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'-days', self.ca_validity,
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'-in', pub_key_path,
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'-CA', "%s.pub"%self.path,
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'-CAkey', self.path,
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'-CAcreateserial',
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'-out', cert_path,
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'-%s'%self.key_algorithm])
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return cert_path
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