Create registration for Azure Notification Hub in Postman

Question

I created a Service Bus / Notification Hub in my Azure Portal.

Now I'm trying to use the Azure REST API with Postman based on this doc : https://msdn.microsoft.com/en-us/library/azure/dn223265.aspx

Here is the Postman configuration I have :

It's a POST method of the following url (Create Registration) https://mysite.servicebus.windows.net/mysite-notif/registrations/?api-version=2015-01 (I replaced with mysite in that url for privacy reasons)

In the Headers, I typed 2 entries :

Content-Type application/atom+xml;type=entry;charset=utf-8

Authorization Endpoint=sb://[mysite].servicebus.windows.net/;SharedAccessKeyName=DefaultFullSharedAccessSignature;SharedAccessKey=[mykey] (this Connection information I copied from the Azure portal)

In the Body, I chose raw - XML(txt/xml) and pasted :

<?xml version="1.0" encoding="utf-8"?>
<entry xmlns="http://www.w3.org/2005/Atom">
    <content type="application/xml">
        <WindowsRegistrationDescription xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/netservices/2010/10/servicebus/connect">
            <Tags>myTag, myOtherTag</Tags>
            <ChannelUri>{ChannelUri}</ChannelUri>
        </WindowsRegistrationDescription>
    </content>
</entry>

(it's the Native registration for Windows Notification Service example)

When I send this call from within Postman, I get a 401 Error :

<Error>
    <Code>401</Code>
    <Detail>MalformedToken: The credentials contained in the authorization header are not in the WRAP format..TrackingId:ee0d87ef-6175-46a1-9b35-6c31eed6049d_G2,TimeStamp:8/13/2015 9:58:26 AM</Detail>
</Error>

What am I missing ? Is it the Authorization tab I left on "No Auth" in Postman ? Is it the value of the Authorization header that should be encoded like shown here ? Creating registration ID for Azure Notification Hub via REST api

Thanks.

Answer 1

Here is an example of a pre-request script for postman that generates the needed header:

function getAuthHeader(resourceUri, keyName, key) {

    var d = new Date();
    var sinceEpoch = Math.round(d.getTime() / 1000);

    var expiry = (sinceEpoch + 3600);

    var stringToSign = encodeURIComponent(resourceUri) + '\n' + expiry;

    var hash = CryptoJS.HmacSHA256(stringToSign, key);
    var hashInBase64 = CryptoJS.enc.Base64.stringify(hash);

    var sasToken = 'SharedAccessSignature sr=' + encodeURIComponent(resourceUri) + '&sig=' + encodeURIComponent(hashInBase64) + '&se=' + expiry + '&skn=' + keyName;

    return sasToken;
}

postman.setEnvironmentVariable('azure-authorization', getAuthHeader(request['url'], "mySharedAccessKeyName", "mySharedAccessKey"));
postman.setEnvironmentVariable('current-date',new Date().toUTCString());

To use it do the following:

1. add this pre-request script to your postman request
2. replace mySharedAccessKeyName , mySharedAccessKey with your credentials
3. add a header Authorization: {{azure-authorization}}
4. add a header x-ms-date: {{current-date}}