(C) Workaround for the deprecated Crypt2.OpaqueSignString method

Shows how to replace the deprecated OpaqueSignString method. (Chilkat is moving away from the use of CkByteData.)

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

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#include <C_CkCrypt2.h>
#include <C_CkCert.h>
#include <C_CkByteData.h>
#include <C_CkBinData.h>

void ChilkatSample(void)
    {
    HCkCrypt2 crypt;
    HCkCert cert;
    BOOL success;
    const char *textToSign;
    HCkByteData outData;
    const char *base64_sig;
    HCkBinData bd;

    crypt = CkCrypt2_Create();

    cert = CkCert_Create();
    // ...
    // Load the cert from a source such as a .pfx/.p12 file, smart card, USB token, Apple keychain, Windows certificate store, etc.
    // 
    success = CkCrypt2_SetSigningCert(crypt,cert);

    // Sign the utf-8 byte representation of the text.
    CkCrypt2_putCharset(crypt,"utf-8");

    textToSign = "This is the text to sign";

    // ------------------------------------------------------------------------
    // The OpaqueSignString method is deprecated:

    outData = CkByteData_Create();

    success = CkCrypt2_OpaqueSignString(crypt,textToSign,outData);

    // ------------------------------------------------------------------------
    // Workaround.
    // (Chilkat is moving away from using CkByteData)

    CkCrypt2_putEncodingMode(crypt,"base64");
    base64_sig = CkCrypt2_opaqueSignStringENC(crypt,textToSign);

    bd = CkBinData_Create();
    CkBinData_AppendEncoded(bd,base64_sig,"base64");

    // Access the raw bytes from bd.


    CkCrypt2_Dispose(crypt);
    CkCert_Dispose(cert);
    CkByteData_Dispose(outData);
    CkBinData_Dispose(bd);

    }