binary file sent from windows -> linux help needed

[ekhule]

Hello,

I am sending an encrypted binary file over tcp/ip form windows to linux. When I get into linux and try to run mcrypt to decrypt the file I get "wrong key" error. I am wondering somehow if the file is being corrupted because of the different platforms? Here are some facts I do know:

1. This works with the exact same code windows->windows
2. My file where I write the binary form the tcp/ip stream looks like this:

void StringToFile(string msg, string file)
{
ofstream ofs(file.c_str(), ofstream::binary);
ofs.clear();
ofs.write(msg.data(), message.size());
ofs.close();
}

Can anyone help?

Regards,
Ellay K.

[Philip Nicoletti]

Is that actual code or did you just type it in ? The reason I am asking:

ofs.write(msg.data(), message.size());

[ekhule]

I just typed it in.. that is a typo.. the actual code is:

ofs.write(msg.data(), msg.size());

Thanks..; any idea what might be going wrong?

Regards,
Ellay K.

[ekhule]

One additional piece of information.. this is how I write files to strings:

string WriteFileToString(string filename)
{
	ifstream infile(filename.c_str(), ifstream::binary);
	infile.seekg(0,ios::end);
	size_t length = infile.tellg();
	infile.seekg(0, ios::beg);
	string message(length, 0);
	copy(istreambuf_iterator<char>(infile), istreambuf_iterator<char>(), message.begin());
	return message;
}

I am wondering if the line return difference between unix and windows is my problem? I dont know how to fix that.

Regards,
Ellay K.

[ekhule]

Another interesting piece of information. If I write the message in the code like this:

string msg="<?xml version=\"1.0\" encoding=\"UTF-8\"?> <Status> <Time>1246650079</Time> <Msg_ID>73</Msg_ID> <Name>Testing </Name>";

it works both windows->windows and windows->linux

however if I write it like this:

string msg="<?xml version=\"1.0\" encoding=\"UTF-8\"?> \
					      <Status> \
						   <Time>1246650079</Time> \
						      <Msg_ID>73</Msg_ID> \
						       <Name>Testing </Name>";

It only works windows->windows and not windows to linux.

[ekhule]

It also seems to work with linux with less than 170 characters.. more than 170 characters it crashes.. can anyone help me?

Regards,
Ellay K.

[Lindley]

The most common reason why using multiple lines would cause a problem is differing newline conventions between the platforms. However, if you're opening all your files (for reading and writing) in binary mode, that shouldn't be a problem.....