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#!/usr/bin/env python
import lief
import argparse
import os
import stat
import sys
def change_interpreter(target, interpreter, output=None):
if not os.path.isfile(target) or not lief.is_elf(target):
print("Wrong target! ({})".format(target))
return 1
if not os.path.isfile(interpreter) or not lief.is_elf(interpreter):
print("Wrong interpreter! ({})".format(interpreter))
return 1
binary = lief.parse(target)
if not binary.has_interpreter:
print("The given target doesn't have interpreter!")
return 1
binary.interpreter = interpreter
output_path = output
if output_path is None:
output_path = os.path.basename(target)
output_path += "_updated"
if os.path.isfile(output_path):
os.remove(output_path)
binary.write(output_path)
# Set as executable
st = os.stat(output_path)
os.chmod(output_path, st.st_mode | stat.S_IEXEC)
return 0
def main():
parser = argparse.ArgumentParser(description='Change the ELF interpreter of the given binary')
parser.add_argument("-o", "--output",
help = 'Path to the binary rewritten',
action = 'store',
default = None)
parser.add_argument("target",
metavar="<elf>",
help='Target ELF file')
parser.add_argument("interpreter",
metavar="<interpreter>",
help='Path to the new interpreter')
args = parser.parse_args()
status = change_interpreter(args.target, args.interpreter, args.output)
sys.exit(status)
if __name__ == "__main__":
main()
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