Running a C++ Script and Retreiving Output

[tycragg]

I hope someone can help me with a problem that's presented itself to me. I have a C++ script that receives 2 input values and forms a resultant output value using the code below:

AnsiString asMessage=Edit1->Text;
    AnsiString asImei=Edit2->Text;
    char *message = asMessage.c_str();
    char *imei = asImei.c_str();
    char code[9];

Edit3->Text=AnsiString(code);

Is there anyway for me to replicate the above function in PHP, or run the script and receive the output that goes into Edit3? I have no experience with C++, and so really don't have a clue where to start with implementing with in PHP.

Thanks in advance.

[dagon]

if you explained what the c++ does then i may be able to give you the equivalent in php

[tycragg]

dagon;10964433 wrote:

if you explained what the c++ does then i may be able to give you the equivalent in php

Thanks very much. I didn't write the code, and don't have a clue about C++, so I'm having major problems understanding how it works. Basically the C++ accepts two inputs ("message" and "IMEI") and generates a "code" based on these two inputs.

For example, if I enter in message "TEST" and IMEI "123456", the code comes out as "19CA2A51".

Could there be other files within the C++ project that are used in the generation of the code? I notice that I left out the lines:

int ret;
ret = GenerateMasterCode(message, imei, code);

from before the last line above.

[Nulled]

Hey,

Are you trying to hash up those 2 strings into one code ?

Nulled

[tycragg]

Nulled;10964462 wrote:

Hey,

Are you trying to hash up those 2 strings into one code ?

Nulled

That's exactly what the code does. As I say, I didn't write the code and don't have a clue about C++, so I'm not sure how it combines them.

Thanks in advance.

[dagon]

what do you do with the result? where does the input come from?

[tycragg]

Basically I'm just looking to populate a variable with the result. For example, I'd have something like:

$message = "Test";
$imei = "123456";

// Generate code

echo $code;

I just need to find a way to generate the same code that's generated by the C++ program.

Does that make sense?

[Nulled]

It makes easy sense, but if you are trying to hash it up..wouldn't you like to unhash it ?

[dagon]

tycragg;10964473 wrote:

Does that make sense?

makes sense, but as i don't know c++ the only way i could help is to know how the value is used. best just to wait for someone that dose know c++

[tycragg]

Nulled;10964476 wrote:

It makes easy sense, but if you are trying to hash it up..wouldn't you like to unhash it ?

I actually have no idea what I'm trying to do to be honest. Basically, I somehow need to generate exactly the same codes that this C++ program generates, but using PHP or another language. I wonder whether this is possible?

[Nulled]

I don't know if it can be actually made in php since you are dealing with c-style here.
First your code is regerting ANSI encoding and then makes them c-style.after that makes an array from there characters. I am not a c++ expert..but i don't think it can be done..

[tycragg]

Nulled;10964479 wrote:

I don't know if it can be actually made in php since you are dealing with c-style here.
First your code is regerting ANSI encoding and then makes them c-style.after that makes an array from there characters. I am not a c++ expert..but i don't think it can be done..

Interesting. Could there be a way to run the C++ program (with the inputted values) and output the result?

[bradgrafelman]

Nulled wrote:

if you are trying to hash it up..wouldn't you like to unhash it ?

That doesn't make much sense to me, since I think of a cryptographic "hash" as being a one-way algorithm to convert a variably-sized amount of data into an (often) smaller amount of characters/data to be used for purposes such as checksums, hash lookup tables, etc.

Nulled;10964479 wrote:

I don't know if it can be actually made in php since you are dealing with c-style here.
First your code is regerting ANSI encoding and then makes them c-style.after that makes an array from there characters. I am not a c++ expert..but i don't think it can be done..

A C-style string is nothing but an null-terminated array of characters, something you could easily emulate in PHP.

@: If you're wanting to convert the C++ code to PHP, then you'd have to know the algorithm that the GenerateMasterCode() function uses to convert the arguments you pass to it into a string of characters (the "code").

[tycragg]

bradgrafelman;10964483 wrote:

@: If you're wanting to convert the C++ code to PHP, then you'd have to know the algorithm that the GenerateMasterCode() function uses to convert the arguments you pass to it into a string of characters (the "code").

Here is the code that seems to include the function GenerateMasterCode(). Is this helpful at all?

#ifndef GMSMASTERDLL
#define GMSMASTERDLL

#if defined(EXPORTDLL)
    #define PP_DLL __declspec(dllexport)
#else
    #define PP_DLL __declspec(dllimport)
#endif

#ifdef __cplusplus
    extern "C"
    {
#endif

PP_DLL int __stdcall GenerateMasterCode(char *message, char *imei, char *code);

#ifdef __cplusplus
    }
#endif

#endif

[bradgrafelman]

tycragg wrote:

Is this helpful at all?

It's helpful only in the sense that it shows that the GenerateMasterCode() is an external function located in some DLL.

tycragg wrote:

Could there be a way to run the C++ program (with the inputted values) and output the result?

Assuming you've compiled the C++ code already, sure - just use one of the [man]exec[/man] functions to execute the program (and pass any arguments) and retrieve the output.

[tycragg]

bradgrafelman;10964487 wrote:

It's helpful only in the sense that it shows that the GenerateMasterCode() is an external function located in some DLL.

I have the DLL file, but I don't seem to have any way of opening it without it displaying strange characters. Is there an editor I can use to do this?

bradgrafelman;10964487 wrote:

Assuming you've compiled the C++ code already, sure - just use one of the [man]exec[/man] functions to execute the program (and pass any arguments) and retrieve the output.

I wish I knew how to do this. :queasy:

[tycragg]

Is there anyone that could possibly help me with this? I can upload the entire C++ project that I was sent if someone is willing to assist me with opening the DLL file, etc.

[bradgrafelman]

AFAIK, you can't disassemble a DLL file into C/C++ code. You might be able to get it into assembly code, but that's about it.

[tycragg]

This is the source code for the GenerateMasterCode() function. Could anyone possibly help me in converting this to PHP? I would be so extremely grateful.

int slow_crc32(int sum, char *p, int len)
{
  while (len--)
  {
    int i;
    char byte = *p++;

for (i = 0; i < 8; ++i)
{
  int osum = sum;
  sum <<= 1;
  if (byte & 0x80)
    sum |= 1 ;
  if (osum & 0x80000000)
    sum ^= POLY;
  byte <<= 1;
}
  }
  return sum;
}

void WordToHex(char *p,unsigned int c)
{

unsigned int b = c;
unsigned int mask=0xF0000000;
char i,shift=28;

for(i=0;i<8;i++){
	c = b & mask;		
	c = c >> shift;		
	if(c>9)
		c += 0x37;
	else
		c += 0x30;
	*p++=c;
	mask >>= 4;
	//mask = mask >> 4;
	shift -= 4;
}
}

int __stdcall GenerateMasterCode(char *message, char *imei, char *code)
{
	volatile int crc = var1 ^ var2;
	char buf[4]={0,0,0,0};

if(strlen(message)==0){
	return -1;
}
if(strlen(imei)==0){
	return -1;
}

if(strlen(message)>127){
	return -1;
}
if(strlen(imei)>127){
	return -1;
}

crc=slow_crc32(crc, imei, strlen(imei));
crc=slow_crc32(crc, buf, 4);
crc=slow_crc32(crc, message, strlen(message));
crc=slow_crc32(crc, buf, 4);
WordToHex(code,crc);
*(code+8)=0;
return 0;
}