import os
import json
from datetime import datetime

from ida_typeinf import *
from idaapi import *
from idautils import *
from idc import *

def mylog(func_name,msg):
    with open("my.log","a+") as f:#报错日志写入
        current_time = datetime.now()
        fmttime = current_time.strftime("%Y-%m-%d %H:%M:%S")
        f.write(f"[{fmttime}]: {func_name} -> {msg}\n")
def export_func_asm(file_name,func_addr):
    try:
        with open(file_name,"w+") as f:
            func_ea=get_func(func_addr)#获取有效函数地址对象
            func_name=get_func_name(func_addr)#获取函数名称
            f.write(f"Assembly for function {func_name} start:0x{func_ea.start_ea:x} end:0x{func_ea.end_ea:x}\n")
            for ea in Heads(func_ea.start_ea,func_ea.end_ea):#遍历
                asm_line=generate_disasm_line(ea,GENDSM_REMOVE_TAGS)#提取汇编，去除标签
                f.write(f"0x{ea:x}: {asm_line}\n")
    except Exception as msg:
        mylog("export_func_asm",msg)

def export_func(extractfile):
    if(extractfile is None):exit(-1)
    func_file=extractfile+"_extract.c"
    try:
        with open(func_file,"w") as file:
            for func_addr in Functions():#迭代器编译所有函数
                func_name=get_func_name(func_addr)#获取函数名称
                if(func_name in BLACK_LIST):continue#黑名单处理
                func_seg=getseg(func_addr)#获取函数段
                if(func_seg.name!=7 or func_seg.perm !=5):continue   #去除其他段函数
                #tmp_filename=extractfile+"_"+func_name+".asm"  
                #export_func_asm(tmp_filename,func_addr) #提取函数汇编
                code=decompile(func_addr) #反编译，提取c
                if code :
                    file.write(f"//Function: {func_name} ->0x{func_addr} {func_seg.name} perm->{func_seg.perm}\n")
                    file.write(str(code)+"\n\n") #写入文件
    except Exception as msg:
        mylog("export_func",msg)

def export_local_types_for_struct():
    try:
        #print(f"Number of local types: {num_types}")
        type_list=[]
        i=0
        while True:
            i+=1
            type_name = get_numbered_type_name(i)  # 获取类型名称
            if(type_name is None):return type_list
            type_data=get_numbered_type(None,i)    #获取类型
            mylog("export_local_types_for_struct",type_name)
            if not type_data or type_data[1] is None :continue  #[1]判断是否为普通类型，普通类型[1]为None
            tinfo = tinfo_t()
            # 调用 deserialize序列化
            success = tinfo.deserialize(None, type_data[0], type_data[1],None)
            if(success and tinfo.is_struct()):
                if( type_name in STRUCT_BACKLIST):continue  #struct黑名单处理
                struct_info={
                    "name":type_name,
                    "size":f"0x{tinfo.get_size():x}",
                    "info":tinfo.__str__(),#属性返回字符串
                }
                type_list.append(struct_info) # 结果字典形式返回

    except Exception as msg:
        mylog("export_local_types_for_struct",msg)

def export_local_types(save_file):
    save_file=save_file+"_Estruct.json"
    struct_list=export_local_types_for_struct()#返回字典列表
    if(struct_list is None):return
    # 将结构体信息转换为 JSON 格式
    json_output = json.dumps(struct_list, indent=4)  
    #print(json_output)
    with open(save_file,"w") as f:
        f.write(json_output)
#函数黑名单
BLACK_LIST={
"_start","_dl_relocate_static_pie",
"deregister_tm_clones","register_tm_clones",
"__do_global_dtors_aux","frame_dummy",
}  
#结构体黑名单
STRUCT_BACKLIST={
    "Elf64_Sym","Elf64_Rela","Elf64_Dyn","Elf64_Verneed","Elf64_Vernaux"
}    
def main():
    save_dir="result"
    extractfile="extract.c"
    filepath="tmp.txt"
    if (os.path.exists(filepath) and os.path.isfile(filepath) ):
        with open(filepath,"r") as f:
            extractfile=f.read() 
    extractfile=os.path.join(save_dir,extractfile)
    export_func(extractfile)
    export_local_types(extractfile)

if __name__ == "__main__":
    main()
    idaapi.qexit(0)