(C++) Transition from Email.GetSignedByCertChain to Email.LastSignerCert

Provides instructions for replacing deprecated GetSignedByCertChain method calls with LastSignerCert.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <CkEmail.h>
#include <CkCertChain.h>
#include <CkCert.h>

void ChilkatSample(void)
    {
    CkEmail email;

    // ...
    // ...

    // ------------------------------------------------------------------------
    // The GetSignedByCertChain method is deprecated:

    CkCertChain *certChainObj = email.GetSignedByCertChain();
    if (email.get_LastMethodSuccess() == false) {
        std::cout << email.lastErrorText() << "\r\n";
        return;
    }

    // ...
    // ...

    delete certChainObj;

    // ------------------------------------------------------------------------
    // Do the equivalent using LastSignerCert to get the signing certificate,
    // then build the cert chain from the signing certificate object.

    CkCert signerCert;
    bool success = email.LastSignerCert(0,signerCert);
    if (success == false) {
        std::cout << email.lastErrorText() << "\r\n";
        return;
    }

    // Get the certificate chain from the signer certificate.
    CkCertChain certChain;
    success = signerCert.BuildCertChain(certChain);
    if (success == false) {
        std::cout << signerCert.lastErrorText() << "\r\n";
        return;
    }
    }