(C) Create CAdES-BES .p7m using Smart Card or USB Token

Demonstrates how to create a CAdES BES invoice.xml.p7m using a certificate stored on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.77 and at the time of this writing is restricted to the Windows operating system.

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#include <C_CkCrypt2.h>
#include <C_CkCert.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkCrypt2 crypt;
    HCkCert cert;
    BOOL success;
    HCkJsonObject jsonSignedAttrs;
    const char *inFile;
    const char *sigFile;

    // Note: Requires Chilkat v9.5.0.77 or greater.

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    crypt = CkCrypt2_Create();

    // Use a certificate on a smartcard or USB token.
    cert = CkCert_Create();
    // Load the certificate on the smartcard currently in the reader (or on the USB token).
    // Pass an empty string to allow Chilkat to automatically choose the CSP (Cryptographi Service Provider).
    // See Load Certificate on Smartcard for information about explicitly selecting a particular CSP.
    success = CkCert_LoadFromSmartcard(cert,"");
    if (success != TRUE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkCrypt2_Dispose(crypt);
        CkCert_Dispose(cert);
        return;
    }

    // Provide the smartcard PIN.
    // If the PIN is not explicitly provided here, the Windows OS should
    // display a dialog for the PIN.
    CkCert_putSmartCardPin(cert,"000000");

    // Provide the certificate for signing.
    success = CkCrypt2_SetSigningCert(crypt,cert);
    if (success != TRUE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        CkCrypt2_Dispose(crypt);
        CkCert_Dispose(cert);
        return;
    }

    // Indicate that SHA-256 should be used.
    CkCrypt2_putHashAlgorithm(crypt,"sha256");

    // Specify the signed attributes to be included.
    // (This is what makes it CAdES-BES compliant.)
    jsonSignedAttrs = CkJsonObject_Create();
    CkJsonObject_UpdateInt(jsonSignedAttrs,"contentType",1);
    CkJsonObject_UpdateInt(jsonSignedAttrs,"signingTime",1);
    CkJsonObject_UpdateInt(jsonSignedAttrs,"messageDigest",1);
    CkJsonObject_UpdateInt(jsonSignedAttrs,"signingCertificateV2",1);
    CkCrypt2_putSigningAttributes(crypt,CkJsonObject_emit(jsonSignedAttrs));

    inFile = "qa_data/xml/IT01234567890_11002.xml";
    sigFile = "qa_output/IT01234567890_11002.xml.p7m";

    // Create the CAdES-BES signature, which contains the original data.
    success = CkCrypt2_CreateP7M(crypt,inFile,sigFile);
    if (success == FALSE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        CkCrypt2_Dispose(crypt);
        CkCert_Dispose(cert);
        CkJsonObject_Dispose(jsonSignedAttrs);
        return;
    }

    printf("Success.\n");


    CkCrypt2_Dispose(crypt);
    CkCert_Dispose(cert);
    CkJsonObject_Dispose(jsonSignedAttrs);

    }