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未解决 [求助] 关于frida 参数打印的问题 50.00雪花

发表于: 2021-12-8 13:46 3067

未解决 [求助] 关于frida 参数打印的问题 50.00雪花

小新不爱笑

2021-12-8 13:46

3067

SecurityLib::signString(&v44, v16, &v43, &v42);
 
int __fastcall SecurityLib::signString(int a1, int a2, unsigned __int8 *a3, unsigned __int8 *a4)
{
  int v4; // r8
  int v5; // r8
  unsigned __int8 *v6; // r6
  unsigned __int8 *v7; // r5
  unsigned int v8; // r0
  unsigned int v9; // r0
  const char *v10; // r1
  const char *v11; // r1
  int v12; // r1
  int v14; // [sp+0h] [bp-58h]
  int v15; // [sp+44h] [bp-14h]
  int v16; // [sp+48h] [bp-10h]
 
  v16 = v4;
  v5 = a1;
  v6 = a4;
  v7 = a3;
  CkRsa::CkRsa(&v14);
  v8 = *v7;
  if ( v8 << 31 )
    v9 = *(v7 + 1);
  else
    v9 = v8 >> 1;
  if ( v9 )
  {
    if ( *v6 << 31 )
      v10 = *(v6 + 2);
    else
      v10 = (v6 + 1);
    CkRsa::ImportPrivateKey(&v14, v10);
    CkRsa::put_EncodingMode(&v14, "hex");
    CkMultiByteBase::put_Utf8(&v14, 1);
    CkRsa::put_Charset(&v14, "utf-8");
    CkRsa::put_LittleEndian(&v14, 0);
    if ( *v7 << 31 )
      v11 = *(v7 + 2);
    else
      v11 = (v7 + 1);
    v12 = CkRsa::signStringENC(&v14, v11, "sha-1");
    if ( v12 )
      std::__ndk1::basic_string<char,std::__ndk1::char_traits<char>,std::__ndk1::allocator<char>>::basic_string<decltype(nullptr)>(
        v5,
        v12);//v12 是const char *
    else
      std::__ndk1::basic_string<char,std::__ndk1::char_traits<char>,std::__ndk1::allocator<char>>::basic_string<decltype(nullptr)>(
        v5,
        "01");
  }
  else
  {
    std::__ndk1::basic_string<char,std::__ndk1::char_traits<char>,std::__ndk1::allocator<char>>::basic_string<decltype(nullptr)>(
      v5,
      "01");
  }
  CkRsa::~CkRsa(&v14);
  return _stack_chk_guard - v15;
}

v12 = CkRsa::signStringENC(&v14, v11, "sha-1");

v12是const char * 我能打印出来后面经过basic_string方法我就打不出来了

我就想打印 SecurityLib::signString v44参数
看起来是C++的 string
目前用readStdString没打印出来,hexdump 也没打出什么关键东西

function readStdString(str){
    var isTiny = (str.readU8 & 1) === 0;
    if (isTiny){
        return str.add(1).readUtf8String();
    }
    return str.add(2 * Process.pointerSize).readPointer().readUtf8String();
}