(Unicode 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.

Chilkat C/C++ Library Downloads
MS Visual C/C++ C++ Builder Linux C/C++ Alpine Linux C/C++	MacOS C/C++ iOS C/C++ Android C/C++ MinGW C/C++

#include <C_CkAuthAzureSASW.h>
#include <C_CkDateTimeW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkFileAccessW.h>

void ChilkatSample(void)
    {
    HCkAuthAzureSASW authSas;
    HCkDateTimeW dtExpiry;
    HCkStringBuilderW sbResourceUri;
    const wchar_t *sasToken;
    HCkFileAccessW fac;

    // 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.
    // -------------------------------------------------------------------

    authSas = CkAuthAzureSASW_Create();
    CkAuthAzureSASW_putAccessKey(authSas,L"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.
    CkAuthAzureSASW_putStringToSign(authSas,L"resourceURI,expiry");

    // Create an expiry to 30 days in the future.
    dtExpiry = CkDateTimeW_Create();
    CkDateTimeW_SetFromCurrentSystemTime(dtExpiry);
    CkDateTimeW_AddDays(dtExpiry,30);
    CkAuthAzureSASW_SetTokenParam(authSas,L"expiry",L"se",CkDateTimeW_getAsUnixTimeStr(dtExpiry,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.
    CkAuthAzureSASW_SetTokenParam(authSas,L"keyName",L"skn",L"RootManageSharedAccessKey");

    // Set the URL-encoded-resourceURI
    sbResourceUri = CkStringBuilderW_Create();
    CkStringBuilderW_Append(sbResourceUri,L"https://<yournamespace>.servicebus.windows.net/");
    CkStringBuilderW_Encode(sbResourceUri,L"url",L"utf-8");
    CkAuthAzureSASW_SetTokenParam(authSas,L"resourceURI",L"sr",CkStringBuilderW_getAsString(sbResourceUri));

    // Generate the SAS token.
    sasToken = CkAuthAzureSASW_generateToken(authSas);
    if (CkAuthAzureSASW_getLastMethodSuccess(authSas) != TRUE) {
        wprintf(L"%s\n",CkAuthAzureSASW_lastErrorText(authSas));
        CkAuthAzureSASW_Dispose(authSas);
        CkDateTimeW_Dispose(dtExpiry);
        CkStringBuilderW_Dispose(sbResourceUri);
        return;
    }

    wprintf(L"SAS token: %s\n",sasToken);

    // Save the SAS token to a file.
    // We can then use this pre-generated token for future Service Bus operations.
    fac = CkFileAccessW_Create();
    CkFileAccessW_WriteEntireTextFile(fac,L"qa_data/tokens/serviceBusSas.txt",sasToken,L"utf-8",FALSE);


    CkAuthAzureSASW_Dispose(authSas);
    CkDateTimeW_Dispose(dtExpiry);
    CkStringBuilderW_Dispose(sbResourceUri);
    CkFileAccessW_Dispose(fac);

    }