Undefined reference to ... QSslCertificate::fromData()

Opa114

I want to create a QSslCertificate from pure Certificate Data i read from windows certificate store. My Little piece of code looks like:

    HCERTSTORE hCertStore = NULL;
    PCCERT_CONTEXT pCertContext = NULL;
    hCertStore = CertOpenSystemStore(NULL, L"My");

    if (! hCertStore) {
        qWarning("Failed to open store %s", qPrintable("My"));
        continue;
    }

    while (pCertContext = CertEnumCertificatesInStore(hCertStore, pCertContext)) {
        QByteArray qba(reinterpret_cast<const char *>(pCertContext->pbCertEncoded), pCertContext->cbCertEncoded);

        QSslCertificate::fromData(qba, QSsl::Pem);
    }

When i run my Code i get the following error msg:
undefined reference to `_imp___ZN15QSslCertificate8fromDataERK10QByteArrayN4QSsl14EncodingFormatE'

So to me it seems that there is a Problem with the Format / Encoding of the Input data? i changed QSsl::Pem to QSsl::Der, but same error. So where is the probelm? thanks!

EDIT:
Solved. See third comment for solution!

SGaist

Hi and welcome to devnet,

That kind of error generally comes from a library not linked to your application/library. Are you doing this from a Qt project ?

On a side note, why don't you store the certificate(s) return from QSslCertificate::fromData ?

Opa114

@SGaist

yes i did it in a Qt Console Project.

Did i need a library for using QSslCertificate? I thought it comes with Qt and did not need external libraries. So if yes, what library did i need? OpenSSL?

The problem is here: QSslCertificate::fromData(qba, QSsl::Pem); so i can't store anything.

SGaist

No OpenSSL is not provided because of current international regulation about cryptographic software. So yes you need to have OpenSSL installed.

Did you build Qt yourself ? Because the prebuilt package come with the support for OpenSSL enabled.

Opa114

@Opa114

i solved it. I had to add Qt += network in my *.pro file. So it work's without a third party library like OpenSSL.

SGaist

Good !

The Qt SSL classes are using OpenSSL under the hood, except on OS X where there is now a new backend for OS X's Cryptographic Framework.

Opa114

@SGaist thanks for the hint. i will keep it in mind if i compile for OS X :)