Fixed some syntax bugs
[re6stnet.git] / registry.py
1 #!/usr/bin/env python
2 import argparse, math, random, select, smtplib, sqlite3, string, socket
3 import subprocess, time, threading, traceback, errno, logging, os, xmlrpclib
4 from SimpleXMLRPCServer import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler
5 from email.mime.text import MIMEText
6 from OpenSSL import crypto
7 import utils
8
9 # To generate server ca and key with serial for 2001:db8:42::/48
10 # openssl req -nodes -new -x509 -key ca.key -set_serial 0x120010db80042 -days 365 -out ca.crt
11
12 IPV6_V6ONLY = 26
13 SOL_IPV6 = 41
14
15
16 class RequestHandler(SimpleXMLRPCRequestHandler):
17
18 def _dispatch(self, method, params):
19 return self.server._dispatch(method, (self,) + params)
20
21
22 class SimpleXMLRPCServer4(SimpleXMLRPCServer):
23
24 allow_reuse_address = True
25
26
27 class SimpleXMLRPCServer6(SimpleXMLRPCServer4):
28
29 address_family = socket.AF_INET6
30
31 def server_bind(self):
32 self.socket.setsockopt(SOL_IPV6, IPV6_V6ONLY, 1)
33 SimpleXMLRPCServer4.server_bind(self)
34
35
36 class main(object):
37
38 def __init__(self):
39 self.cert_duration = 365 * 86400
40 self.time_out = 86400
41 self.refresh_interval = 600
42 self.last_refresh = time.time()
43
44 utils.setupLog(3)
45
46 # Command line parsing
47 parser = argparse.ArgumentParser(
48 description='Peer discovery http server for vifibnet')
49 _ = parser.add_argument
50 _('port', type=int, help='Port of the host server')
51 _('--db', required=True,
52 help='Path to database file')
53 _('--ca', required=True,
54 help='Path to ca.crt file')
55 _('--key', required=True,
56 help='Path to certificate key')
57 _('--mailhost', required=True,
58 help='SMTP server mail host')
59 _('--bootstrap', action="append",
60 help='''VPN prefix of the peers to send as bootstrap peer,
61 instead of random ones''')
62 _('--private',
63 help='VPN IP of the node on which runs the registry')
64 self.config = parser.parse_args()
65
66 # Database initializing
67 self.db = sqlite3.connect(self.config.db, isolation_level=None)
68 self.db.execute("""CREATE TABLE IF NOT EXISTS peers (
69 prefix text primary key not null,
70 address text not null,
71 date integer default (strftime('%s','now')))""")
72 self.db.execute("CREATE INDEX IF NOT EXISTS peers_ping ON peers(date)")
73 self.db.execute("""CREATE TABLE IF NOT EXISTS tokens (
74 token text primary key not null,
75 email text not null,
76 prefix_len integer not null,
77 date integer not null)""")
78 try:
79 self.db.execute("""CREATE TABLE vpn (
80 prefix text primary key not null,
81 email text,
82 cert text)""")
83 except sqlite3.OperationalError, e:
84 if e.args[0] != 'table vpn already exists':
85 raise RuntimeError
86 else:
87 self.db.execute("INSERT INTO vpn VALUES ('',null,null)")
88
89 # Loading certificates
90 with open(self.config.ca) as f:
91 self.ca = crypto.load_certificate(crypto.FILETYPE_PEM, f.read())
92 with open(self.config.key) as f:
93 self.key = crypto.load_privatekey(crypto.FILETYPE_PEM, f.read())
94 # Get vpn network prefix
95 self.network = bin(self.ca.get_serial_number())[3:]
96 logging.info("Network prefix : %s/%u" % (self.network, len(self.network)))
97
98 # Starting server
99 server4 = SimpleXMLRPCServer4(('0.0.0.0', self.config.port), requestHandler=RequestHandler, allow_none=True)
100 server4.register_instance(self)
101 server6 = SimpleXMLRPCServer6(('::', self.config.port), requestHandler=RequestHandler, allow_none=True)
102 server6.register_instance(self)
103
104 # Main loop
105 while True:
106 try:
107 r, w, e = select.select([server4, server6], [], [])
108 except (OSError, select.error) as e:
109 if e.args[0] != errno.EINTR:
110 raise
111 else:
112 for r in r:
113 r._handle_request_noblock()
114
115 def requestToken(self, handler, email):
116 while True:
117 # Generating token
118 token = ''.join(random.sample(string.ascii_lowercase, 8))
119 # Updating database
120 try:
121 self.db.execute("INSERT INTO tokens VALUES (?,?,?,?)", (token, email, 16, int(time.time())))
122 break
123 except sqlite3.IntegrityError:
124 pass
125
126 # Creating and sending email
127 s = smtplib.SMTP(self.config.mailhost)
128 me = 'postmaster@vifibnet.com'
129 msg = MIMEText('Hello world !\nYour token : %s' % (token,)) # XXX
130 msg['Subject'] = '[Vifibnet] Token Request'
131 msg['From'] = me
132 msg['To'] = email
133 s.sendmail(me, email, msg.as_string())
134 s.quit()
135
136 def _getPrefix(self, prefix_len):
137 max_len = 128 - len(self.network)
138 assert 0 < prefix_len <= max_len
139 try:
140 prefix, = self.db.execute("""SELECT prefix FROM vpn WHERE length(prefix) <= ? AND cert is null
141 ORDER BY length(prefix) DESC""", (prefix_len,)).next()
142 except StopIteration:
143 logging.error('There are no more free /%s prefix available' % (prefix_len,))
144 raise
145 while len(prefix) < prefix_len:
146 self.db.execute("UPDATE vpn SET prefix = ? WHERE prefix = ?", (prefix + '1', prefix))
147 prefix += '0'
148 self.db.execute("INSERT INTO vpn VALUES (?,null,null)", (prefix,))
149 if len(prefix) < max_len or '1' in prefix:
150 return prefix
151 self.db.execute("UPDATE vpn SET cert = 'reserved' WHERE prefix = ?", (prefix,))
152 return self._getPrefix(prefix_len)
153
154 def requestCertificate(self, handler, token, cert_req):
155 try:
156 req = crypto.load_certificate_request(crypto.FILETYPE_PEM, cert_req)
157 with self.db:
158 try:
159 token, email, prefix_len, _ = self.db.execute("SELECT * FROM tokens WHERE token = ?", (token,)).next()
160 except StopIteration:
161 logging.exception('Bad token (%s) in request' %(token,))
162 raise
163 self.db.execute("DELETE FROM tokens WHERE token = ?", (token,))
164
165 # Get a new prefix
166 prefix = self._getPrefix(prefix_len)
167
168 # Create certificate
169 cert = crypto.X509()
170 #cert.set_serial_number(serial)
171 cert.gmtime_adj_notBefore(0)
172 cert.gmtime_adj_notAfter(self.cert_duration)
173 cert.set_issuer(self.ca.get_subject())
174 subject = req.get_subject()
175 subject.CN = "%u/%u" % (int(prefix, 2), prefix_len)
176 cert.set_subject(subject)
177 cert.set_pubkey(req.get_pubkey())
178 cert.sign(self.key, 'sha1')
179 cert = crypto.dump_certificate(crypto.FILETYPE_PEM, cert)
180
181 # Insert certificate into db
182 self.db.execute("UPDATE vpn SET email = ?, cert = ? WHERE prefix = ?", (email, cert, prefix))
183
184 return cert
185 except:
186 traceback.print_exc()
187 raise
188
189 def getCa(self, handler):
190 return crypto.dump_certificate(crypto.FILETYPE_PEM, self.ca)
191
192 def getPrivateAddress(self, handler):
193 return 'http://[%s]:%u' % (self.config.private, self.config.port)
194
195 def _randomPeer(self):
196 return self.db.execute("""SELECT prefix, address
197 FROM peers ORDER BY random() LIMIT 1""").next()
198
199 def getBootstrapPeer(self, handler, client_prefix):
200 cert, = self.db.execute("SELECT cert FROM vpn WHERE prefix = ?",
201 (client_prefix,)).next()
202 logging.trace('Getting bootpeer info...')
203 if self.config.bootstrap:
204 bootpeer = random.choice(self.config.bootstrap)
205 try:
206 prefix, address = self.db.execute("""SELECT prefix, address
207 FROM peers WHERE prefix = ?""", (bootpeer,)).next()
208 except StopIteration:
209 logging.info('Bootstrap peer %s unknown, sending random peer'
210 % hex(int(bootpeer, 2))[2:])
211 prefix, address = self._randomPeer()
212 else:
213 prefix, address = self._randomPeer()
214 logging.trace('Gotten bootpeer info from db')
215 r, w = os.pipe()
216 try:
217 threading.Thread(target=os.write, args=(w, cert)).start()
218 p = subprocess.Popen(('openssl', 'rsautl', '-encrypt', '-certin', '-inkey', '/proc/self/fd/%u' % r),
219 stdin=subprocess.PIPE, stdout=subprocess.PIPE)
220 logging.info("Sending bootstrap peer (%s, %s)" % (prefix, address))
221 return xmlrpclib.Binary(p.communicate('%s %s' % (prefix, address))[0])
222 finally:
223 os.close(r)
224 os.close(w)
225
226 def declare(self, handler, address):
227 print "declaring new node"
228 client_address, address = address
229 #client_address, _ = handler.client_address
230 client_ip = utils.binFromIp(client_address)
231 if client_ip.startswith(self.network):
232 prefix = client_ip[len(self.network):]
233 prefix, = self.db.execute("SELECT prefix FROM vpn WHERE prefix <= ? ORDER BY prefix DESC LIMIT 1", (prefix,)).next()
234 self.db.execute("INSERT OR REPLACE INTO peers (prefix, address) VALUES (?,?)", (prefix, address))
235 return True
236 else:
237 logging.warning("Unauthorized connection from %s which does not start with %s"
238 % (utils.ipFromBin(client_ip), utils.ipFromBin(self.network.ljust(128, '0'))))
239 return False
240
241 def getPeerList(self, handler, n, client_address):
242 assert 0 < n < 1000
243 client_ip = utils.binFromIp(client_address)
244 if client_ip.startswith(self.network):
245 if time.time() > self.last_refresh + self.refresh_interval:
246 print "refreshing peers for dead ones"
247 self.db.execute("DELETE FROM peers WHERE ( date + ? ) <= CAST (strftime('%s', 'now') AS INTEGER)", (self.time_out,))
248 self.last_refesh = time.time()
249 print "sending peers"
250 return self.db.execute("SELECT prefix, address FROM peers ORDER BY random() LIMIT ?", (n,)).fetchall()
251 else:
252 logging.warning("Unauthorized connection from %s which does not start with %s"
253 % (utils.ipFromBin(client_ip), utils.ipFromBin(self.network.ljust(128, '0'))))
254 raise RuntimeError
255
256 if __name__ == "__main__":
257 main()