git clone https://github.com/blacknbunny/Shellcode-Encrypter-Decrypter.git && cd Shellcode-Encrypter-Decrypter/python encdecshellcode.py --help

Encryption:
    python encdecshellcode.py --shellcode \x41\x41\x42\x42 --key SECRETKEY --option encrypt
Decryption:
    python encdecshellcode.py --shellcode \x41\x41\x42\x42 --key SECRETKEY --option decrypt

import argparsefrom sys import argv, stdout, exit
parser = argparse.ArgumentParser(description="Encrypting & Decrypting Shellcode")parser.add_argument('-s', '--shellcode', help='Shellcode To Encrypt & Decrypt')parser.add_argument('-k', '--key', help='Key Of The Shellcode To Encrypt & Decrpyt', default='key')parser.add_argument('-o', '--option', help='Argument For Encrypting or Decrypting The Shellcode')
args = parser.parse_args()
def EncryptShellcode(shellcode, key):
    shellcode_encrypted_hex = []    shellcode_decrypted_hex = []    shellcode_replaced_hex = ''

    count = 0    for d in range(0, len(shellcode) / 4):        count += 4        shellcode_decrypted_hex.append(shellcode[count-4:count].replace(r'\x', ''))
    for x in range(0, len(shellcode_decrypted_hex)):        for d in range(0, len(key)):            shellcode_encrypted_hex.append(hex(ord(shellcode_decrypted_hex[x].decode('hex')) ^ ord(key[d])))
    for y in range(0, len(shellcode_encrypted_hex)):        shellcode_replaced_hex += shellcode_encrypted_hex[y].replace('0x', r'\x')
    return shellcode_replaced_hex
def DecryptShellcode(shellcode, key):    shellcode_decrypted = []    shellcode_xor_headers = []
    shellcode_replaced_hex = ''    string = ''
    for x in shellcode:        string += shellcode.replace(r'\x', '')        break
    count = 0    for y in string:        shellcode_xor_headers.append(string[count:count+2])        count += 6
    while '' in shellcode_xor_headers:        shellcode_xor_headers.remove('')

    for z in range(len(shellcode_xor_headers)):        shellcode_decrypted.append(hex(ord(shellcode_xor_headers[z].decode('hex')) ^ ord(key[0])))
    for h in range(0, len(shellcode_decrypted)):        shellcode_replaced_hex += shellcode_decrypted[h].replace('0x', r'\x')
    return shellcode_replaced_hexdef PrintHelp():    parser.print_help()    exit(1)
def main():    try:        shellcode = args.shellcode        key = args.key        if args.option == "encrypt":            print( "Encrypted Shellcode = " + EncryptShellcode(shellcode, key) )        elif args.option == "decrypt":            print( "\nDecrypted Shellcode = " + DecryptShellcode(shellcode, key) )        else:            PrintHelp()    except Exception as e:        PrintHelp()        print(e)
if __name__ == '__main__':    exit(main())