(Unicode C++) Create a CAdES-T Signature

Demonstrates how to create a signature with an external timestamp that certifies the time of signing. This requires an online TSA (Time Stamping Authority) service that is capable of producing RFC 3161 compliant timestamps.

Note: This example requires Chilkat v9.5.0.78 or greater.

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#include <CkCrypt2W.h>
#include <CkCertW.h>
#include <CkJsonObjectW.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkCrypt2W crypt;

    // This example will use a certificate + private key from a .pfx/.p12 file.
    // On Windows systems, it is also possible to use certs on smartcards/usb tokens or certs pre-installed in the Windows registry.
    CkCertW cert;

    const wchar_t *pfxPath = L"qa_data/pfx/myCertAndKey.p12";
    const wchar_t *pfxPassword = L"test123";

    bool success = cert.LoadPfxFile(pfxPath,pfxPassword);
    if (success != true) {
        wprintf(L"%s\n",cert.lastErrorText());
        return;
    }

    success = crypt.SetSigningCert(cert);

    // Use SHA-256 rather than the default of SHA-1
    crypt.put_HashAlgorithm(L"sha256");

    // Create JSON that tells Chilkat what signing attributes to include:
    CkJsonObjectW attrs;
    attrs.UpdateBool(L"contentType",true);
    attrs.UpdateBool(L"signingTime",true);
    attrs.UpdateBool(L"messageDigest",true);
    attrs.UpdateBool(L"signingCertificateV2",true);

    // A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority).
    // We must include the TSA's URL, as well as a few options to indicate what is desired.
    // Except for the TSA URL, the options shown here are typically what you would need.
    attrs.UpdateBool(L"timestampToken.enabled",true);
    attrs.UpdateString(L"timestampToken.tsaUrl",L"https://freetsa.org/tsr");
    attrs.UpdateBool(L"timestampToken.addNonce",false);
    attrs.UpdateBool(L"timestampToken.requestTsaCert",true);
    attrs.UpdateString(L"timestampToken.hashAlg",L"sha256");

    crypt.put_SigningAttributes(attrs.emit());

    const wchar_t *inFile = L"qa_data/json/sample.json";
    const wchar_t *outFile = L"qa_output/sample_cades_t.p7m";

    // This creates the CAdES-T signature.  During the signature creation, it
    // communicates with the TSA to get a timestampToken.
    success = crypt.CreateP7M(inFile,outFile);
    if (success != true) {
        wprintf(L"%s\n",crypt.lastErrorText());
        return;
    }

    wprintf(L"Success.\n");
    }