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(Excel) 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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' 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.
' -------------------------------------------------------------------

Dim authSas As Chilkat.AuthAzureSAS
Set authSas = Chilkat.NewAuthAzureSAS
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.
Dim dtExpiry As Chilkat.CkDateTime
Set dtExpiry = Chilkat.NewCkDateTime
Dim success As Boolean
success = dtExpiry.SetFromCurrentSystemTime()
success = dtExpiry.AddDays(30)
success = 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.
success = authSas.SetTokenParam("keyName","skn","RootManageSharedAccessKey")

' Set the URL-encoded-resourceURI
Dim sbResourceUri As Chilkat.StringBuilder
Set sbResourceUri = Chilkat.NewStringBuilder
success = sbResourceUri.Append("https://<yournamespace>.servicebus.windows.net/")
success = sbResourceUri.Encode("url","utf-8")
success = authSas.SetTokenParam("resourceURI","sr",sbResourceUri.GetAsString())

' Generate the SAS token.

sasToken = authSas.GenerateToken()
If (authSas.LastMethodSuccess <> True) Then
    Debug.Print authSas.LastErrorText
    Exit Sub
End If

Debug.Print "SAS token: "; sasToken

' Save the SAS token to a file.
' We can then use this pre-generated token for future Service Bus operations.
Dim fac As Chilkat.FileAccess
Set fac = Chilkat.NewFileAccess
success = fac.WriteEntireTextFile("qa_data/tokens/serviceBusSas.txt",sasToken,"utf-8",False)

 

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