(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.

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

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

void ChilkatSample(void)
    {
    HCkPdf pdf;
    BOOL success;
    HCkJsonObject json;
    HCkCert cert;
    HCkJsonObject jsonArss;

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

    pdf = CkPdf_Create();

    // Load a PDF to be signed.
    success = CkPdf_LoadFile(pdf,"qa_data/pdf/hello.pdf");
    if (success == FALSE) {
        printf("%s\n",CkPdf_lastErrorText(pdf));
        CkPdf_Dispose(pdf);
        return;
    }

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

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

    // Define the appearance of the signature.
    CkJsonObject_UpdateInt(json,"page",1);
    CkJsonObject_UpdateString(json,"appearance.y","top");
    CkJsonObject_UpdateString(json,"appearance.x","left");
    CkJsonObject_UpdateString(json,"appearance.fontScale","10.0");
    CkJsonObject_UpdateString(json,"appearance.text[0]","Digitally signed by: cert_cn");
    CkJsonObject_UpdateString(json,"appearance.text[1]","current_dt");
    CkJsonObject_UpdateString(json,"appearance.text[2]","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 = CkCert_Create();
    success = CkCert_LoadFromFile(cert,"qa_data/certs/myCert.cer");
    if (success == FALSE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkPdf_Dispose(pdf);
        CkJsonObject_Dispose(json);
        CkCert_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 = CkJsonObject_Create();

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

    // Tell the pdf object to use the certificate for signing.
    success = CkPdf_SetSigningCert(pdf,cert);
    if (success == FALSE) {
        printf("%s\n",CkPdf_lastErrorText(pdf));
        CkPdf_Dispose(pdf);
        CkJsonObject_Dispose(json);
        CkCert_Dispose(cert);
        CkJsonObject_Dispose(jsonArss);
        return;
    }

    // Chilkat will build the signed PDF locally, but will (internally) use ARSS
    // to do the RSA sign hash operation.
    success = CkPdf_SignPdf(pdf,json,"qa_output/hello_ltv_signed.pdf");
    if (success == FALSE) {
        printf("%s\n",CkPdf_lastErrorText(pdf));
        CkPdf_Dispose(pdf);
        CkJsonObject_Dispose(json);
        CkCert_Dispose(cert);
        CkJsonObject_Dispose(jsonArss);
        return;
    }

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


    CkPdf_Dispose(pdf);
    CkJsonObject_Dispose(json);
    CkCert_Dispose(cert);
    CkJsonObject_Dispose(jsonArss);

    }