(Unicode C) Sign PDF using ARSS (Aruba Remote Signing Service)

See more Signing in the Cloud Examples

Demonstrates how to sign a PDF using the Aruba Remote Signing Service (ARSS).

Note: This example requires Chilkat v9.5.0.96 or greater.

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#include <C_CkPdfW.h>
#include <C_CkJsonObjectW.h>
#include <C_CkCertW.h>

void ChilkatSample(void)
    {
    HCkPdfW pdf;
    BOOL success;
    HCkJsonObjectW json;
    HCkCertW cert;
    HCkJsonObjectW jsonArss;

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

    pdf = CkPdfW_Create();

    // Load a PDF to be signed.
    success = CkPdfW_LoadFile(pdf,L"qa_data/pdf/hello.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf));
        CkPdfW_Dispose(pdf);
        return;
    }

    // Options for signing are specified in JSON.
    json = CkJsonObjectW_Create();

    // Indicate that we want an LTV-enabled signature
    CkJsonObjectW_UpdateBool(json,L"ltvOcsp",TRUE);

    // Define the appearance of the signature.
    CkJsonObjectW_UpdateInt(json,L"page",1);
    CkJsonObjectW_UpdateString(json,L"appearance.y",L"top");
    CkJsonObjectW_UpdateString(json,L"appearance.x",L"left");
    CkJsonObjectW_UpdateString(json,L"appearance.fontScale",L"10.0");
    CkJsonObjectW_UpdateString(json,L"appearance.text[0]",L"Digitally signed by: cert_cn");
    CkJsonObjectW_UpdateString(json,L"appearance.text[1]",L"current_dt");
    CkJsonObjectW_UpdateString(json,L"appearance.text[2]",L"This is an LTV-enabled signature.");

    // Load the certificate used for signing.  The certificate's private key is stored on 
    // the Aruba.it server and the signing will happen remotely using the
    // ARSS (Aruba Remote Signing Service).
    // However, we still need the certificate locally (without private key).
    cert = CkCertW_Create();
    success = CkCertW_LoadFromFile(cert,L"qa_data/certs/myCert.cer");
    if (success == FALSE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkPdfW_Dispose(pdf);
        CkJsonObjectW_Dispose(json);
        CkCertW_Dispose(cert);
        return;
    }

    // To sign using the Aruba Remote Signing Service, 
    // add the following lines of code to specify your authentication credentials,
    // and the ID of the certificate w/ private key on the server to be used.
    jsonArss = CkJsonObjectW_Create();

    // Set the "service" equal to "ARSS" to tell Chilkat to use ARSS for signing.
    CkJsonObjectW_UpdateString(jsonArss,L"service",L"ARSS");
    // Specify the certificate ID, such as "AS0"
    // This certificate should match the certificate loaded in the above code.
    CkJsonObjectW_UpdateString(jsonArss,L"certID",L"YOUR_ARSS_CERT_ID");
    CkJsonObjectW_UpdateString(jsonArss,L"otpPwd",L"YOUR_OTP_PWD");
    CkJsonObjectW_UpdateString(jsonArss,L"typeOtpAuth",L"demoprod");
    CkJsonObjectW_UpdateString(jsonArss,L"user",L"YOUR_ARSS_USERNAME");
    CkJsonObjectW_UpdateString(jsonArss,L"userPWD",L"YOUR_ARSS_PASSWORD");
    success = CkCertW_SetCloudSigner(cert,jsonArss);

    // Tell the pdf object to use the certificate for signing.
    success = CkPdfW_SetSigningCert(pdf,cert);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf));
        CkPdfW_Dispose(pdf);
        CkJsonObjectW_Dispose(json);
        CkCertW_Dispose(cert);
        CkJsonObjectW_Dispose(jsonArss);
        return;
    }

    // Chilkat will build the signed PDF locally, but will (internally) use ARSS
    // to do the RSA sign hash operation.
    success = CkPdfW_SignPdf(pdf,json,L"qa_output/hello_ltv_signed.pdf");
    if (success == FALSE) {
        wprintf(L"%s\n",CkPdfW_lastErrorText(pdf));
        CkPdfW_Dispose(pdf);
        CkJsonObjectW_Dispose(json);
        CkCertW_Dispose(cert);
        CkJsonObjectW_Dispose(jsonArss);
        return;
    }

    wprintf(L"The PDF has been successfully cryptographically signed with long-term validation.\n");


    CkPdfW_Dispose(pdf);
    CkJsonObjectW_Dispose(json);
    CkCertW_Dispose(cert);
    CkJsonObjectW_Dispose(jsonArss);

    }