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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / Error creating a Azure...
Small and medium business | Business Central, N...
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Error creating a Azure SAS-token in AL

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Posted on by Jan Hoglund 35

I trying to create a function in AL that will create a SAS auth to be able to send a message to Azure. 

Below is an example of a call that returns a complete SAS-token that I can use for a http-request. 

pastedimage1678441026446v3.png

This is the function that creates the token. 

pastedimage1678438231022v2.png

But when I try to use the SAS-key I get an error saying that the the token is incorrect, not invalid, just simply wrong. 

pastedimage1678437624118v1.png

On a visual inspection of the key it seems very similar to a real token created.
Obviously there is something wrong in my function but I cannot find out why. 

Help!

  • Jan Hoglund Profile Picture
    Jan Hoglund 35 on at
    RE: Error creating a Azure SAS-token in AL

    After lots of testing and debugging and a good night sleep I have made some adjustments and the function is now working correctly. 

    My error was primarily that I used the Base64decode on the Key. However, the key should be used as-is and not be decoded before used. 

    Complete working function below if anyone else stumbles upon this. The function will return a complete SAS-token that can be used as Authorization in a http-request header to send a message to an Azure Service Bus Queue. 

    pastedimage1678717159841v1.png

  • Jan Hoglund Profile Picture
    Jan Hoglund 35 on at
    RE: Error creating a Azure SAS-token in AL

    Thank you Sir for a quick response.

    The link shows similar documentation that MS has in it's documentation

    learn.microsoft.com/.../service-bus-sas

    learn.microsoft.com/.../generate-sas-token

    However, I suspect that the Crypto.GenerateBase64KeyedHashAsBase64String using HMACSHA256 does not give me a correct response and thus creating an invalid authorization.

    Or is there a better way to create a SAS auth in BC/AL?

  • Suggested answer
    Nitin Verma Profile Picture
    Nitin Verma 21,081 Super User 2024 Season 1 on at
    RE: Error creating a Azure SAS-token in AL

    Hi,

    You can visit the below link, see if it help you.

    github.com/.../service-bus-shared-access-signature-authentication.md

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