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229 lines
11 KiB
Python
229 lines
11 KiB
Python
#!/usr/bin/env python
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# ***********************IMPORTANT NMAP LICENSE TERMS************************
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# * *
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# * The Nmap Security Scanner is (C) 1996-2012 Insecure.Com LLC. Nmap is *
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# * also a registered trademark of Insecure.Com LLC. This program is free *
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# * software; you may redistribute and/or modify it under the terms of the *
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# * GNU General Public License as published by the Free Software *
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# * Foundation; Version 2 with the clarifications and exceptions described *
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# * below. This guarantees your right to use, modify, and redistribute *
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# * this software under certain conditions. If you wish to embed Nmap *
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# * technology into proprietary software, we sell alternative licenses *
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# * (contact sales@insecure.com). Dozens of software vendors already *
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# * license Nmap technology such as host discovery, port scanning, OS *
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# * detection, version detection, and the Nmap Scripting Engine. *
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# * *
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# * Note that the GPL places important restrictions on "derived works", yet *
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# * it does not provide a detailed definition of that term. To avoid *
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# * misunderstandings, we interpret that term as broadly as copyright law *
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# * allows. For example, we consider an application to constitute a *
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# * "derivative work" for the purpose of this license if it does any of the *
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# * following: *
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# * o Integrates source code from Nmap *
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# * o Reads or includes Nmap copyrighted data files, such as *
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# * nmap-os-db or nmap-service-probes. *
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# * o Executes Nmap and parses the results (as opposed to typical shell or *
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# * execution-menu apps, which simply display raw Nmap output and so are *
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# * not derivative works.) *
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# * o Integrates/includes/aggregates Nmap into a proprietary executable *
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# * installer, such as those produced by InstallShield. *
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# * o Links to a library or executes a program that does any of the above *
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# * *
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# * The term "Nmap" should be taken to also include any portions or derived *
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# * works of Nmap, as well as other software we distribute under this *
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# * license such as Zenmap, Ncat, and Nping. This list is not exclusive, *
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# * but is meant to clarify our interpretation of derived works with some *
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# * common examples. Our interpretation applies only to Nmap--we don't *
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# * speak for other people's GPL works. *
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# * *
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# * If you have any questions about the GPL licensing restrictions on using *
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# * Nmap in non-GPL works, we would be happy to help. As mentioned above, *
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# * we also offer alternative license to integrate Nmap into proprietary *
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# * applications and appliances. These contracts have been sold to dozens *
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# * of software vendors, and generally include a perpetual license as well *
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# * as providing for priority support and updates. They also fund the *
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# * continued development of Nmap. Please email sales@insecure.com for *
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# * further information. *
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# * *
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# * As a special exception to the GPL terms, Insecure.Com LLC grants *
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# * permission to link the code of this program with any version of the *
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# * OpenSSL library which is distributed under a license identical to that *
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# * listed in the included docs/licenses/OpenSSL.txt file, and distribute *
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# * linked combinations including the two. You must obey the GNU GPL in all *
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# * respects for all of the code used other than OpenSSL. If you modify *
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# * this file, you may extend this exception to your version of the file, *
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# * but you are not obligated to do so. *
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# * *
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# * If you received these files with a written license agreement or *
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# * contract stating terms other than the terms above, then that *
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# * alternative license agreement takes precedence over these comments. *
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# * *
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# * Source is provided to this software because we believe users have a *
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# * right to know exactly what a program is going to do before they run it. *
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# * This also allows you to audit the software for security holes (none *
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# * have been found so far). *
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# * *
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# * Source code also allows you to port Nmap to new platforms, fix bugs, *
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# * and add new features. You are highly encouraged to send your changes *
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# * to nmap-dev@insecure.org for possible incorporation into the main *
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# * distribution. By sending these changes to Fyodor or one of the *
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# * Insecure.Org development mailing lists, or checking them into the Nmap *
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# * source code repository, it is understood (unless you specify otherwise) *
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# * that you are offering the Nmap Project (Insecure.Com LLC) the *
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# * unlimited, non-exclusive right to reuse, modify, and relicense the *
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# * code. Nmap will always be available Open Source, but this is important *
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# * because the inability to relicense code has caused devastating problems *
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# * for other Free Software projects (such as KDE and NASM). We also *
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# * occasionally relicense the code to third parties as discussed above. *
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# * If you wish to specify special license conditions of your *
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# * contributions, just say so when you send them. *
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# * *
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# * This program is distributed in the hope that it will be useful, but *
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# * WITHOUT ANY WARRANTY; without even the implied warranty of *
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# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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# * General Public License v2.0 for more details at *
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# * http://www.gnu.org/licenses/gpl-2.0.html , or in the COPYING file *
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# * included with Nmap. *
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# * *
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# ***************************************************************************/
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# This module parses the --script-args and stores in the form of key/value
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# pairs. The logic is same as in nse_main.lua, except that values are not
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# returned as tables but as strings.
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import re
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# "^%s*([^'\"%s{},=][^{},=]-)%s*[},=]"
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unquoted_re = re.compile(r'\s*([^\'"\s{},=][^{},=]*?)\s*([},=]|$)')
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# "^%s*(['\"])(.-[^\\])%1%s*[},=]"
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quoted_re = re.compile(r'\s*(([\'"])(.*?[^\\])\2)\s*([},=]|$)')
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# "^%s*(['\"])%1%s*[},=]"
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empty_re = re.compile(r'\s*(([\'"])\2)\s*([},=]|$)')
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def parse_string(s, start):
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"""Parses a single string that is quoted, unquoted or empty. It returns the
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found string along with the next starting position """
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for pattern in unquoted_re, quoted_re, empty_re:
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m = pattern.match(s, start) or quoted_re.match(s, start)
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if m:
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return m.group(1), m.end(1)
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raise ValueError("No string found at %s." % repr(s[start:]))
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def next_char(s, start):
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"""Returns the next character and position in the string."""
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while start < len(s) and s[start].isspace():
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start += 1
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if start < len(s):
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return s[start], start
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else:
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return None, start
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def parse_value(s, start):
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"""If the string starting from start is a name-value pair, returns a
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name-value tuple. Otherwise returns a plain string."""
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nc, j = next_char(s, start)
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if nc == "{":
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j = parse_table(s, j)
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return s[start:j], j
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else:
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tmp, j = parse_string(s, j)
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nc, j = next_char(s, j)
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if nc == "=":
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# Key/value?
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j += 1
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begin = j
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nc, j = next_char(s, j)
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if nc == "{":
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j = parse_table(s, j)
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else:
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dummy, j = parse_string(s, j)
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return (tmp, s[begin:j]), j
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else:
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return s[start:j], j
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def parse_table(s, start):
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"""This function is responsible for parsing a table; i.e, a string that
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starts with '{'. It returns the position where the balancing pair of braces
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gets closed."""
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nc, j = next_char(s, start)
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if not nc or nc != "{":
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raise ValueError("No '{' found at %s." % repr(s[start:]))
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j += 1
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while True:
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nc, j = next_char(s, j)
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if nc == "}":
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# End of table.
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return j + 1
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else:
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# Replace this with a call to parse_value.
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v, j = parse_value(s, j)
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nc, j = next_char(s, j)
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if nc == ",":
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j += 1
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def parse_script_args(s):
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"""Main function responsible for parsing the script args and storing the
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name-value pairs in a list. If an invalid argument is present it stores the
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value as None."""
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args = []
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nc, j = next_char(s, 0)
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try:
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while nc is not None:
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val, j = parse_value(s, j)
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if type(val) == str:
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raise ValueError("Only name-value pairs expected in parse_script_args.")
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else:
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args.append(val)
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nc, j = next_char(s, j)
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if nc == ",":
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j += 1
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nc, j = next_char(s, j)
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except ValueError:
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return None
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return args
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def parse_script_args_dict(raw_argument):
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"""Wrapper function that copies the name-value pairs from a list into a
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dictionary."""
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args_dict = {}
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args = parse_script_args(raw_argument)
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if args is None:
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return None
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for item in args:
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if(len(item) == 2): # only key/value pairs are stored
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args_dict[item[0]] = item[1]
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return args_dict
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if __name__ == '__main__':
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TESTS = (
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('', []),
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('a=b,c=d', [('a', 'b'), ('c', 'd')]),
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('a="b=c"', [('a', '"b=c"')]),
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('a="def\\"ghi"', [('a', '"def\\"ghi"')]),
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('a={one,{two,{three}}}', [('a', '{one,{two,{three}}}')]),
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('a={"quoted}quoted"}', [('a', '{"quoted}quoted"}')]),
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('a="unterminated', None),
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('user=foo,pass=",{}=bar",whois={whodb=nofollow+ripe},userdb=C:\\Some\\Path\\To\\File', [('user', 'foo'), ('pass', '",{}=bar"'), ('whois', '{whodb=nofollow+ripe}'), ('userdb', 'C:\\Some\\Path\\To\\File')]),
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)
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for test, expected in TESTS:
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args_dict = parse_script_args_dict(test)
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print args_dict
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args = parse_script_args(test)
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if args == expected:
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print "PASS" , test
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continue
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print "FAIL", test
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if args is None:
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print "Parsing error"
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else:
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print "%d args" % len(args)
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for a, v in args:
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print a, "=", v
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if expected is None:
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print "Expected parsing error"
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else:
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print "Expected %d args" % len(expected)
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for a, v in expected:
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print a, "=", v
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