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#!/usr/bin/env python
"""
safe2bin.py - Simple safe(hex) to binary format converter
Copyright (c) 2006-2017 sqlmap developers (http://sqlmap.org/)
See the file 'doc/COPYING' for copying permission
"""
import binascii
import re
import string
import os
import sys
from optparse import OptionError
from optparse import OptionParser
# Regex used for recognition of hex encoded characters
HEX_ENCODED_CHAR_REGEX = r"(?P<result>\\x[0-9A-Fa-f]{2})"
# Raw chars that will be safe encoded to their slash (\) representations (e.g. newline to \n)
SAFE_ENCODE_SLASH_REPLACEMENTS = "\t\n\r\x0b\x0c"
# Characters that don't need to be safe encoded
SAFE_CHARS = "".join(filter(lambda _: _ not in SAFE_ENCODE_SLASH_REPLACEMENTS, string.printable.replace('\\', '')))
# Prefix used for hex encoded values
HEX_ENCODED_PREFIX = r"\x"
# Strings used for temporary marking of hex encoded prefixes (to prevent double encoding)
HEX_ENCODED_PREFIX_MARKER = "__HEX_ENCODED_PREFIX__"
# String used for temporary marking of slash characters
SLASH_MARKER = "__SLASH__"
def safecharencode(value):
"""
Returns safe representation of a given basestring value
>>> safecharencode(u'test123')
u'test123'
>>> safecharencode(u'test\x01\x02\xff')
u'test\\01\\02\\03\\ff'
"""
retVal = value
if isinstance(value, basestring):
if any([_ not in SAFE_CHARS for _ in value]):
retVal = retVal.replace(HEX_ENCODED_PREFIX, HEX_ENCODED_PREFIX_MARKER)
retVal = retVal.replace('\\', SLASH_MARKER)
for char in SAFE_ENCODE_SLASH_REPLACEMENTS:
retVal = retVal.replace(char, repr(char).strip('\''))
retVal = reduce(lambda x, y: x + (y if (y in string.printable or isinstance(value, unicode) and ord(y) >= 160) else '\\x%02x' % ord(y)), retVal, (unicode if isinstance(value, unicode) else str)())
retVal = retVal.replace(SLASH_MARKER, "\\\\")
retVal = retVal.replace(HEX_ENCODED_PREFIX_MARKER, HEX_ENCODED_PREFIX)
elif isinstance(value, list):
for i in xrange(len(value)):
retVal[i] = safecharencode(value[i])
return retVal
def safechardecode(value, binary=False):
"""
Reverse function to safecharencode
"""
retVal = value
if isinstance(value, basestring):
retVal = retVal.replace('\\\\', SLASH_MARKER)
while True:
match = re.search(HEX_ENCODED_CHAR_REGEX, retVal)
if match:
retVal = retVal.replace(match.group("result"), (unichr if isinstance(value, unicode) else chr)(ord(binascii.unhexlify(match.group("result").lstrip("\\x")))))
else:
break
for char in SAFE_ENCODE_SLASH_REPLACEMENTS[::-1]:
retVal = retVal.replace(repr(char).strip('\''), char)
retVal = retVal.replace(SLASH_MARKER, '\\')
if binary:
if isinstance(retVal, unicode):
retVal = retVal.encode("utf8")
elif isinstance(value, (list, tuple)):
for i in xrange(len(value)):
retVal[i] = safechardecode(value[i])
return retVal
def main():
usage = '%s -i <input file> [-o <output file>]' % sys.argv[0]
parser = OptionParser(usage=usage, version='0.1')
try:
parser.add_option('-i', dest='inputFile', help='Input file')
parser.add_option('-o', dest='outputFile', help='Output file')
(args, _) = parser.parse_args()
if not args.inputFile:
parser.error('Missing the input file, -h for help')
except (OptionError, TypeError), e:
parser.error(e)
if not os.path.isfile(args.inputFile):
print 'ERROR: the provided input file \'%s\' is not a regular file' % args.inputFile
sys.exit(1)
f = open(args.inputFile, 'r')
data = f.read()
f.close()
if not args.outputFile:
args.outputFile = args.inputFile + '.bin'
f = open(args.outputFile, 'wb')
f.write(safechardecode(data))
f.close()
if __name__ == '__main__':
main()
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