Gallopsled / pwntools / 1

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0.0
/pwnlib/commandline/elfpatch.py
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#!/usr/bin/env python2
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from __future__ import absolute_import
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from __future__ import division
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import sys




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import pwnlib.args




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pwnlib.args.free_form = False




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from pwn import *




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from pwnlib.commandline import common




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p = common.parser_commands.add_parser(




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    'elfpatch',










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    help = 'Patch an ELF file',










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    description = 'Patch an ELF file'










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)










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p.add_argument('elf',help="File to patch")




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p.add_argument('offset',help="Offset to patch in virtual address (hex encoded)")




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p.add_argument('bytes',help='Bytes to patch (hex encoded)')




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def main(a):




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    if not a.offset.startswith('0x'):





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        a.offset = '0x' + a.offset




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    offset = int(a.offset, 16)




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    bytes  = unhex(a.bytes)




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    with context.silent:




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        elf    = ELF(a.elf)




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    elf.write(offset, bytes)




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    getattr(sys.stdout, 'buffer', sys.stdout).write(elf.get_data())




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if __name__ == '__main__':





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    pwnlib.commandline.common.main(__file__)




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