TOTP | Help

[Stef]

Hy, I want to create an application which will generate a TOTP code.
(To connect to facebook,...).

I found this code:

QString hmacSha1(QByteArray key, QByteArray baseString)
{
 int blockSize = 64; // HMAC-SHA-1 block size, defined in SHA-1 standard
 if (key.length() > blockSize) { // if key is longer than block size (64), reduce key length with SHA-1 compression
 key = QCryptographicHash::hash(key, QCryptographicHash::Sha1);
 }

QByteArray innerPadding(blockSize, char(0x36)); // initialize inner padding with char "6"
 QByteArray outerPadding(blockSize, char(0x5c)); // initialize outer padding with char "quot;
 // ascii characters 0x36 ("6") and 0x5c ("quot;) are selected because they have large
 // Hamming distance (http://en.wikipedia.org/wiki/Hamming_distance)

for (int i = 0; i < key.length(); i++) {
 innerPadding[i] = innerPadding[i] ^ key.at(i); // XOR operation between every byte in key and innerpadding, of key length
 outerPadding[i] = outerPadding[i] ^ key.at(i); // XOR operation between every byte in key and outerpadding, of key length
 }

// result = hash ( outerPadding CONCAT hash ( innerPadding CONCAT baseString ) ).toBase64
 QByteArray total = outerPadding;
 QByteArray part = innerPadding;
 part.append(baseString);
 total.append(QCryptographicHash::hash(part, QCryptographicHash::Sha1));
 QByteArray hashed = QCryptographicHash::hash(total, QCryptographicHash::Sha1);
 return hashed.toBase64();
}

What can I do ?

Thanks :)

(sorry for my english, I'm french)

[SGaist]

Hi and welcome to devnet,

Are you looking for something like QGoogleAuth ?

[Stef]

Thanks for your help.
I add the file to my project, but there's an error
Do you want the projet ?

mainwindow.obj:-1: erreur : LNK2019: unresolved external symbol "__declspec(dllimport) public: static class QString __cdecl QGoogleAuth::generatePin(class QByteArray)" (_imp?generatePin@QGoogleAuth@@SA?AVQString@@VQByteArray@@@Z) referenced in function "private: void __cdecl MainWindow::on_pushButton_clicked(void)" (?on_pushButton_clicked@MainWindow@@AEAAXXZ)

[SGaist]

Did you link your application to the library ?

[Stef]

I have to link which library ?
(Sorry, I'm a novice)

[SGaist]

The generated when you build the QGoogleAuth project.

[Stef]

I add the ".lib" file, but the error still

mainwindow.obj:-1: erreur : LNK2019: unresolved external symbol "__declspec(dllimport) public: static class QString __cdecl QGoogleAuth::generatePin(class QByteArray)" (_imp?generatePin@QGoogleAuth@@SA?AVQString@@VQByteArray@@@Z) referenced in function "private: void __cdecl MainWindow::on_pushButton_clicked(void)" (?on_pushButton_clicked@MainWindow@@AEAAXXZ)

[SGaist]

How did you add that file ?

[Stef]

Right click on projet,
Add library
Extern library
I select the "qgoogleauth.lib" file :(

[Stef]

It's OK, I've found a solution.
I add all the file of the project, and I do not add library.
So, it build with my project.

Thank you very munch for your precious help :)