import sys
import os
+import socket
import unbound
import re
from M2Crypto import X509, SSL
from ipaddr import IPv4Address, IPv6Address
-def genTLSA(hostname, protocol, port, certificate, output='draft', usage=1, selector=0, mtype=1):
+def genTLSA(hostname, protocol, port, certificate, output='generic', usage=1, selector=0, mtype=1):
"""This function generates a TLSARecord object using the data passed in the parameters,
it then validates the record and returns the RR as a string.
"""
record.isValid(raiseException=True)
- if output == 'draft':
- return record.getRecord(draft=True)
+ if output == 'generic':
+ return record.getRecord(generic=True)
return record.getRecord()
def getA(hostname, secure=True):
except:
raise Exception('Invalid value passed, unable to create a TLSARecord')
- def getRecord(self, draft=False):
- """Returns the RR string of this TLSARecord, either in rfc (default) or draft format"""
- if draft:
+ def getRecord(self, generic=False):
+ """Returns the RR string of this TLSARecord, either in rfc (default) or generic format"""
+ if generic:
return '%s IN TYPE52 \# %s %s%s%s%s' % (self.name, (len(self.cert)/2)+3 , self._toHex(self.usage), self._toHex(self.selector), self._toHex(self.mtype), self.cert)
return '%s IN TLSA %s %s %s %s' % (self.name, self.usage, self.selector, self.mtype, self.cert)
"""An object representing an AAAA Record (IPv6 address)"""
def __init__(self, hostname, address):
self.rrtype = 28
+ self.hostname = hostname
self.address = address
def __str__(self):
if __name__ == '__main__':
import argparse
# create the parser
- parser = argparse.ArgumentParser(description='Create and verify DANE records.', epilog='This tool has a few limitations: it only IPv4 for SSL connections.')
+ parser = argparse.ArgumentParser(description='Create and verify DANE records.', epilog='This tool has a few limitations')
subparsers = parser.add_subparsers(title='Functions', help='Available functions, see %(prog)s function -h for function-specific help')
parser_verify = subparsers.add_parser('verify', help='Verify a TLSA record, exit 0 when all TLSA records are matched, exit 2 when a record does not match the received certificate, exit 1 on error.', epilog='Caveat: For TLSA validation, this program chases through the certificate chain offered by the server, not its local certificates.')
parser_create.add_argument('--port', '-p', action='store', type=int, default=443, help='The port where running TLS is located (default: %(default)s).')
parser_create.add_argument('--protocol', action='store', choices=['tcp','udp','sctp'], default='tcp', help='The protocol the TLS service is using (default: %(default)s).')
parser_create.add_argument('--certificate', '-c', help='The certificate used for the host. If certificate is empty, the certificate will be downloaded from the server')
- parser_create.add_argument('--output', '-o', action='store', default='draft', choices=['draft','rfc','both'], help='The type of output. Draft (private RRtype, 52), RFC (TLSA) or both (default: %(default)s).')
+ parser_create.add_argument('--output', '-o', action='store', default='generic', choices=['generic','rfc','both'], help='The type of output. Generic (RFC 3597, TYPE52), RFC (TLSA) or both (default: %(default)s).')
# Usage of the certificate
parser_create.add_argument('--usage', '-u', action='store', type=int, default=1, choices=[0,1,2,3], help='The Usage of the Certificate for Association. \'0\' for CA, \'1\' for End Entity, \'2\' for trust-anchor, \'3\' for ONLY End-Entity match (default: %(default)s).')
if not args.quiet:
print 'Attempting to verify the record with the TLS service...'
- addresses = getA(args.host, secure=secure)
+ addresses = getA(args.host, secure=secure) + getAAAA(args.host, secure=secure)
for address in addresses:
if not args.quiet:
print 'Got the following IP: %s' % str(address)
sys.exit(1)
# Don't error when the verification fails in the SSL handshake
ctx.set_verify(SSL.verify_none, depth=9)
- connection = SSL.Connection(ctx)
+ if isinstance(address, AAAARecord):
+ sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
+ sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+ else:
+ sock = None
+ connection = SSL.Connection(ctx, sock=sock)
try:
connection.connect((str(address), int(args.port)))
except SSL.Checker.WrongHost, e:
# The name on the remote cert doesn't match the hostname because we connect on IP, not hostname (as we want secure lookup)
pass
+ except socket.error, e:
+ print 'Cannot connect to %s: %s' % (address, str(e))
+ continue
chain = connection.get_peer_cert_chain()
verify_result = connection.get_verify_result()
input_ok = True
except:
sys.stdout.write('Port %s not numerical or within correct range (1 <= port <= 65535), try again (hit enter for default 443): ' % user_input)
- # Get the A records for the host
+ # Get the address records for the host
try:
- addresses = getA(args.host, secure=secure)
+ addresses = getA(args.host, secure=secure) + getAAAA(args.host, secure=secure)
except InsecureLookupException, e:
print >> sys.stderr, str(e)
sys.exit(1)
# We do the certificate handling here, as M2Crypto keeps segfaulting when try to do stuff with the cert if we don't
ctx = SSL.Context()
ctx.set_verify(SSL.verify_none, depth=9)
- connection = SSL.Connection(ctx)
+ if isinstance(address, AAAARecord):
+ sock = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
+ sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+ else:
+ sock = None
+ connection = SSL.Connection(ctx, sock=sock)
try:
connection.connect((str(address), int(connection_port)))
except SSL.Checker.WrongHost:
pass
+ except socket.error, e:
+ print 'Cannot connect to %s: %s' % (address, str(e))
+ continue
chain = connection.get_peer_cert_chain()
for chaincert in chain: