(Unicode 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 <C_CkEmailW.h>
#include <C_CkCertChainW.h>
#include <C_CkCertW.h>

void ChilkatSample(void)
    {
    HCkEmailW email;
    HCkCertChainW certChainObj;
    HCkCertW signerCert;
    BOOL success;
    HCkCertChainW certChain;

    email = CkEmailW_Create();

    // ...
    // ...

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

    certChainObj = CkEmailW_GetSignedByCertChain(email);
    if (CkEmailW_getLastMethodSuccess(email) == FALSE) {
        wprintf(L"%s\n",CkEmailW_lastErrorText(email));
        CkEmailW_Dispose(email);
        return;
    }

    // ...
    // ...

    CkCertChainW_Dispose(certChainObj);

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

    signerCert = CkCertW_Create();
    success = CkEmailW_LastSignerCert(email,0,signerCert);
    if (success == FALSE) {
        wprintf(L"%s\n",CkEmailW_lastErrorText(email));
        CkEmailW_Dispose(email);
        CkCertW_Dispose(signerCert);
        return;
    }

    // Get the certificate chain from the signer certificate.
    certChain = CkCertChainW_Create();
    success = CkCertW_BuildCertChain(signerCert,certChain);
    if (success == FALSE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(signerCert));
        CkEmailW_Dispose(email);
        CkCertW_Dispose(signerCert);
        CkCertChainW_Dispose(certChain);
        return;
    }



    CkEmailW_Dispose(email);
    CkCertW_Dispose(signerCert);
    CkCertChainW_Dispose(certChain);

    }