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