(C++) How to Generate an Azure Service Bus Shared Access Signature (SAS)

Demonstrates generating and using an Azure Service Bus Shared Access Signature (SAS).

Note: This example requires Chilkat v9.5.0.65 or greater.

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#include <CkAuthAzureSAS.h>
#include <CkDateTime.h>
#include <CkStringBuilder.h>
#include <CkFileAccess.h>

void ChilkatSample(void)
    {
    // Note: Requires Chilkat v9.5.0.65 or greater.

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

    // -------------------------------------------------------------------
    // Create a Shared Access Signature (SAS) token for Azure Service Bus.
    // -------------------------------------------------------------------

    CkAuthAzureSAS authSas;
    authSas.put_AccessKey("AzureServiceBus_PrimaryKey");

    // The SAS token for Service Bus will look like this:
    // (The order of params will be different.  The order does not matter.)
    // sig=<signature-string>&se=<expiry>&skn=<keyName>&sr=<URL-encoded-resourceURI>

    // Specify the format of the string to sign.
    authSas.put_StringToSign("resourceURI,expiry");

    // Create an expiry to 30 days in the future.
    CkDateTime dtExpiry;
    dtExpiry.SetFromCurrentSystemTime();
    dtExpiry.AddDays(30);
    authSas.SetTokenParam("expiry","se",dtExpiry.getAsUnixTimeStr(true));

    // Set the skn (keyname)
    // This example uses the key "RootManageSharedAccessKey".  This give full access.
    // In a typical scenario, you would create a new Azure key (for the service bus)
    // in the Azure portal, such that the key has limited permissions.  This would
    // allow you to give the SAS token to others for specific access for some period of time.
    authSas.SetTokenParam("keyName","skn","RootManageSharedAccessKey");

    // Set the URL-encoded-resourceURI
    CkStringBuilder sbResourceUri;
    sbResourceUri.Append("https://<yournamespace>.servicebus.windows.net/");
    sbResourceUri.Encode("url","utf-8");
    authSas.SetTokenParam("resourceURI","sr",sbResourceUri.getAsString());

    // Generate the SAS token.
    const char *sasToken = authSas.generateToken();
    if (authSas.get_LastMethodSuccess() != true) {
        std::cout << authSas.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "SAS token: " << sasToken << "\r\n";

    // Save the SAS token to a file.
    // We can then use this pre-generated token for future Service Bus operations.
    CkFileAccess fac;
    fac.WriteEntireTextFile("qa_data/tokens/serviceBusSas.txt",sasToken,"utf-8",false);
    }