(Swift 2) 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 Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    // 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.
    // -------------------------------------------------------------------

    let authSas = CkoAuthAzureSAS()
    authSas.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.StringToSign = "resourceURI,expiry"

    // Create an expiry to 30 days in the future.
    let dtExpiry = CkoDateTime()
    dtExpiry.SetFromCurrentSystemTime()
    dtExpiry.AddDays(30)
    authSas.SetTokenParam("expiry", authParamName: "se", value: 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", authParamName: "skn", value: "RootManageSharedAccessKey")

    // Set the URL-encoded-resourceURI
    let sbResourceUri = CkoStringBuilder()
    sbResourceUri.Append("https://<yournamespace>.servicebus.windows.net/")
    sbResourceUri.Encode("url", charset: "utf-8")
    authSas.SetTokenParam("resourceURI", authParamName: "sr", value: sbResourceUri.GetAsString())

    // Generate the SAS token.
    var sasToken: String? = authSas.GenerateToken()
    if authSas.LastMethodSuccess != true {
        print("\(authSas.LastErrorText)")
        return
    }

    print("SAS token: \(sasToken!)")

    // Save the SAS token to a file.
    // We can then use this pre-generated token for future Service Bus operations.
    let fac = CkoFileAccess()
    fac.WriteEntireTextFile("qa_data/tokens/serviceBusSas.txt", fileData: sasToken, charset: "utf-8", includePreamble: false)

}