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#!/usr/bin/env python
# vim: set list et ts=8 sts=4 sw=4 ft=python:
# SSLsplit contributed code: Log parser for sslsplit -L
# This script reads the log from standard input and parses it.
# Standard input can point to a file or a named pipe.
# Copyright (C) 2015, Maciej Kotowicz <mak@lokalhost.pl>
# Copyright (C) 2015, Daniel Roethlisberger <daniel@roe.ch>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions, and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import sys
import os
import select
import re
def read_line(f):
"""Read a single line from a file stream; return empty string on EOF"""
buf = ''
while not buf.endswith("\n"):
r, w, e = select.select([f], [], [])
if r:
nextbyte = f.read(1)
if not nextbyte:
return ''
buf += nextbyte
else:
break
return buf
def read_count(f, n):
"""Read n bytes from a file stream; return empty string on EOF"""
buf = ''
while len(buf) < n:
nextchunk = f.read(n - len(buf))
if not nextchunk:
return ''
buf += nextchunk
return buf
class LogSyntaxError(Exception):
"""SSLsplit log file contains unexpected syntax"""
pass
def parse_header(line):
"""Parse the header line into a dict with useful fields"""
# 2015-09-27 14:55:41 UTC [192.0.2.1]:56721 -> [192.0.2.2]:443 (37):
m = re.match(r'(\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2} \S+) \[(.+?)\]:(\d+) -> \[(.+?)\]:(\d+) \((\d+)\):', line)
if not m:
raise LogSyntaxError(line)
res = {}
res['timestamp'] = m.group(1)
res['src_addr'] = m.group(2)
res['src_port'] = int(m.group(3))
res['dst_addr'] = m.group(4)
res['dst_port'] = int(m.group(5))
res['size'] = int(m.group(6))
return res
def parse_log(f):
"""Read log entries from file stream in blocking mode until EOF"""
while True:
line = read_line(f)
if not line:
break
res = parse_header(line)
res['data'] = read_count(f, res['size'])
yield res
if __name__ == '__main__':
for result in parse_log(sys.stdin):
print result
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