(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_CkEmail.h>
#include <C_CkCertChain.h>
#include <C_CkCert.h>

void ChilkatSample(void)
    {
    HCkEmail email;
    HCkCertChain certChainObj;
    HCkCert signerCert;
    BOOL success;
    HCkCertChain certChain;

    email = CkEmail_Create();

    // ...
    // ...

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

    certChainObj = CkEmail_GetSignedByCertChain(email);
    if (CkEmail_getLastMethodSuccess(email) == FALSE) {
        printf("%s\n",CkEmail_lastErrorText(email));
        CkEmail_Dispose(email);
        return;
    }

    // ...
    // ...

    CkCertChain_Dispose(certChainObj);

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

    signerCert = CkCert_Create();
    success = CkEmail_LastSignerCert(email,0,signerCert);
    if (success == FALSE) {
        printf("%s\n",CkEmail_lastErrorText(email));
        CkEmail_Dispose(email);
        CkCert_Dispose(signerCert);
        return;
    }

    // Get the certificate chain from the signer certificate.
    certChain = CkCertChain_Create();
    success = CkCert_BuildCertChain(signerCert,certChain);
    if (success == FALSE) {
        printf("%s\n",CkCert_lastErrorText(signerCert));
        CkEmail_Dispose(email);
        CkCert_Dispose(signerCert);
        CkCertChain_Dispose(certChain);
        return;
    }



    CkEmail_Dispose(email);
    CkCert_Dispose(signerCert);
    CkCertChain_Dispose(certChain);

    }