import argparse
from ShellcodeRDI import *

__version__ = '1.2'

def main():
    parser = argparse.ArgumentParser(description='RDI Shellcode Converter', conflict_handler='resolve')
    parser.add_argument('-v', '--version', action='version', version='%(prog)s Version: ' + __version__)
    parser.add_argument('input_dll', help='DLL to convert to shellcode')
    parser.add_argument('-f', '--function-name', dest='function_name', help='The function to call after DllMain', default='SayHello')
    parser.add_argument('-u', '--user-data', dest='user_data', help='Data to pass to the target function', default='dave')
    parser.add_argument('-c', '--clear-header', dest='clear_header', action='store_true', help='Clear the PE header on load')
    parser.add_argument('-i', '--obfuscate-imports', dest='obfuscate_imports', action='store_true', help='Randomize import dependency load order', default=False)
    parser.add_argument('-d', '--import-delay', dest='import_delay', help='Number of seconds to pause between loading imports', type=int, default=0)    
    arguments = parser.parse_args()

    input_dll = arguments.input_dll
    output_bin = input_dll.replace('.dll', '.bin')

    print('Creating Shellcode: {}'.format(output_bin))
    dll = open(arguments.input_dll, 'rb').read()

    flags = 0

    if arguments.clear_header:
        flags |= 0x1

    if arguments.obfuscate_imports:
        flags = flags | 0x4 | arguments.import_delay << 16

    converted_dll = ConvertToShellcode(dll, HashFunctionName(arguments.function_name), arguments.user_data.encode(), flags)

    with open(output_bin, 'wb') as f:
        f.write(converted_dll)

if __name__ == '__main__':
    main()