How can I get an access token from from Azure AD using NAV2017

prakaash786 · 2018-08-03

Hi

I want to get an access token from azure, first I need to get the authorization code based on the GET request to HTTPRequest and then use the authorization code to get the access token using POST request. How can I get that in NAV from azure.

Regards,
Chandra Prakash Soni

Remco_Reinking · 2018-08-03


URL := 'https://login.microsoftonline.com/'+TenantID+'/oauth2/token';

PostData := 'grant_type=client_credentials'+
            '&client_id='+ClientID+
            '&client_secret='+ClientSecret+
            '&resource='+Resource;
RequestString := PostData;

HttpWebRequest := HttpWebRequest.Create( URL);
HttpWebRequest.Timeout := 30000;
HttpWebRequest.Method := 'POST';
HttpWebRequest.ContentType := 'application/x-www-form-urlencoded';
HttpWebRequest.ContentLength := RequestString.Length;

SetRequestStream( HttpWebRequest, RequestString);
HttpWebResponse := HttpWebRequest.GetResponse;
IF FORMAT(HttpWebResponse.StatusCode) = 'OK' THEN
BEGIN
  StreamReader := StreamReader.StreamReader(HttpWebResponse.GetResponseStream);
  JSonString := StreamReader.ReadToEnd;

with SetRequestStream(VAR HttpWebRequest : DotNet "System.Net.HttpWebRequest";VAR String : DotNet "System.String")
as

StreamWriter := StreamWriter.StreamWriter(HttpWebRequest.GetRequestStream); 
StreamWriter.Write(String);
StreamWriter.Close;
StreamWriter.Dispose;

this JSon string will now contain an element with the 'access_token' and a field 'expires_in' containing the amount of seconds the access_token is valid

Remco_Reinking · 2018-08-03


URL := 'https://login.microsoftonline.com/'+TenantID+'/oauth2/token';

PostData := 'grant_type=client_credentials'+
            '&client_id='+ClientID+
            '&client_secret='+ClientSecret+
            '&resource='+Resource;
RequestString := PostData;

HttpWebRequest := HttpWebRequest.Create( URL);
HttpWebRequest.Timeout := 30000;
HttpWebRequest.Method := 'POST';
HttpWebRequest.ContentType := 'application/x-www-form-urlencoded';
HttpWebRequest.ContentLength := RequestString.Length;

SetRequestStream( HttpWebRequest, RequestString);
HttpWebResponse := HttpWebRequest.GetResponse;
IF FORMAT(HttpWebResponse.StatusCode) = 'OK' THEN
BEGIN
  StreamReader := StreamReader.StreamReader(HttpWebResponse.GetResponseStream);
  JSonString := StreamReader.ReadToEnd;

with SetRequestStream(VAR HttpWebRequest : DotNet "System.Net.HttpWebRequest";VAR String : DotNet "System.String")
as

StreamWriter := StreamWriter.StreamWriter(HttpWebRequest.GetRequestStream); 
StreamWriter.Write(String);
StreamWriter.Close;
StreamWriter.Dispose;

this JSon string will now contain an element with the 'access_token' and a field 'expires_in' containing the amount of seconds the access_token is valid

abhijitger@hotmail.com · 2018-08-03

Hi ,

Thanks for the reply .
The approach elaborated above will fetch access token using Client credentials grant . This approach used the identity of an application to fetch the access token . We want to fetch token for the logged in user using Authorization code grant or Openid Connect

Retrieving access token for the already signed in user in NAV web portal .
How do we reference the singed in Users context .
And using this context fetch the users access token for the third party resource?

Regards,
Abhijit

prakaash786 · 2018-08-03

Hi Remco,

Thanks for the quick answer,

Your solution works and generates the token but that token on decoding gives the client permission, we need to get the token containing the user permissions for the third party. So coming back to the original post where I have mentioned to get the authorization code first using GET and then use that authorization code to get the User access token for the app. I hope I am clear now.

Thanks a lot again for the help.

Regards,
Chandra Prakash Soni

Remco_Reinking · 2018-08-03

prakaash786 wrote: »

Hi Remco,

Thanks for the quick answer,

Your solution works and generates the token but that token on decoding gives the client permission, we need to get the token containing the user permissions for the third party. So coming back to the original post where I have mentioned to get the authorization code first using GET and then use that authorization code to get the User access token for the app. I hope I am clear now.

Thanks a lot again for the help.

Regards,
Chandra Prakash Soni

The complete mechanism is explained oin detail here : https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-v2-protocols-oauth-code

So the code to get the code :-) should contains something like this

https://login.microsoftonline.com/{tenant}/oauth2/v2.0/authorize?
client_id=6731de76-14a6-49ae-97bc-6eba6914391e
&response_type=code
&redirect_uri=http%3A%2F%2Flocalhost%2Fmyapp%2F
&response_mode=query
&scope=openid%20offline_access%20https%3A%2F%2Fgraph.microsoft.com%2Fmail.read
&state=12345

prakaash786 · 2018-08-03

Hi Remco,

I had this problem before, but your solution given me some hope in order to get the authorization code by make the GET request with required parameters but when I try that then it gives the response of the sign in page to sign in.

<!DOCTYPE html>
<html dir="ltr" class="" lang="en">
<head>
<title>Sign in to your account</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=2.0, user-scalable=yes">
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Expires" content="-1">
<meta name="PageID" content="ConvergedSignIn" />
<meta name="SiteID" content="" />
<meta name="ReqLC" content="1033" />
<meta name="LocLC" content="en-US" />

<noscript>
<meta http-equiv="Refresh" content="0; URL=https://login.microsoftonline.com/jsdisabled" />
</noscript>

<link rel="shortcut icon" href="https://secure.aadcdn.microsoftonline-p.com/ests/2.1.7935.15/content/images/favicon_a.ico" />

<meta name="robots" content="none" />

<script type="text/javascript">//<![CDATA[
$Config={"fShowPersistentCookiesWarning":false,"urlMsaLogout":"https://login.live.com/logout.srf?iframed_by=https://login.microsoftonline.com","urlUxPreviewOptOut":"https://login.microsoftonline.com/common/uxpreview/optout","showCantAccessAccountLink":true,"iBindProvider":0,"urlFeatureAnnouncementBlogPost":"https://aka.ms/AA1edlw","fCollapseExcessLinks":true,"fShowLoginV2PreviewLink":true,"urlSessionState":"https://login.microsoftonline.com/common/DeviceCodeStatus","urlResetPassword":"https://passwordreset.microsoftonline.com/?r

The message is quite long so I trimmed it. Now my question is how can I get rid off/bypass the sign in page and get the code (by redirecting it to redirect url.

Thanks in advance.

Regards,
Chandra Prakash Soni

prakaash786 · 2018-08-03

Just to add few more information that the url created for the GET request if I use it in the browser it redirects me to the redirecturl with an authorization code in the url.

abhijitger@hotmail.com · 2018-08-04

The complete mechanism is explained oin detail here : https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-v2-protocols-oauth-code

So the code to get the code :-) should contains something like this

https://login.microsoftonline.com/{tenant}/oauth2/v2.0/authorize?
client_id=6731de76-14a6-49ae-97bc-6eba6914391e
&response_type=code
&redirect_uri=http%3A%2F%2Flocalhost%2Fmyapp%2F
&response_mode=query
&scope=openid%20offline_access%20https%3A%2F%2Fgraph.microsoft.com%2Fmail.read
&state=12345

[/quote]

Hi Remco,

As per the above approach we get the code from the Authorization Endpoint but the reply is redirected to the endpoint mentioned in the redirect_uri query parameter .
If I specify the redirect_uri as Nav WebPage . How do i read the querystring parameter values at the time of page load within the NAV web page .

If there is a way to read the query string parameter values than that will solve the problem

Thanks & Regards,
Abhijit Ger

abhijitger@hotmail.com · 2018-08-04

prakaash786 wrote: »

Hi Remco,

I had this problem before, but your solution given me some hope in order to get the authorization code by make the GET request with required parameters but when I try that then it gives the response of the sign in page to sign in.

<!DOCTYPE html>
<html dir="ltr" class="" lang="en">
<head>
<title>Sign in to your account</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=2.0, user-scalable=yes">
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Expires" content="-1">
<meta name="PageID" content="ConvergedSignIn" />
<meta name="SiteID" content="" />
<meta name="ReqLC" content="1033" />
<meta name="LocLC" content="en-US" />

<noscript>
<meta http-equiv="Refresh" content="0; URL=https://login.microsoftonline.com/jsdisabled" />
</noscript>

<link rel="shortcut icon" href="https://secure.aadcdn.microsoftonline-p.com/ests/2.1.7935.15/content/images/favicon_a.ico" />

<meta name="robots" content="none" />

<script type="text/javascript">//<![CDATA[
$Config={"fShowPersistentCookiesWarning":false,"urlMsaLogout":"https://login.live.com/logout.srf?iframed_by=https://login.microsoftonline.com","urlUxPreviewOptOut":"https://login.microsoftonline.com/common/uxpreview/optout","showCantAccessAccountLink":true,"iBindProvider":0,"urlFeatureAnnouncementBlogPost":"https://aka.ms/AA1edlw","fCollapseExcessLinks":true,"fShowLoginV2PreviewLink":true,"urlSessionState":"https://login.microsoftonline.com/common/DeviceCodeStatus","urlResetPassword":"https://passwordreset.microsoftonline.com/?r

The message is quite long so I trimmed it. Now my question is how can I get rid off/bypass the sign in page and get the code (by redirecting it to redirect url.

Thanks in advance.

Regards,
Chandra Prakash Soni

Hi Chandra,

If you use httpWebrequest to submit the GET Request you will always get the above response . You cannot use httpWebRequest to submit the Authorization code grant request for the simple reason that there is a redirect involved . ( we specify a value in redirect_uri parameter)

This is called three legged oAuth as there are three parties involved user , Server (Aka Client ) and authorization server .

Regards,
Abhijit Ger

How can I get an access token from from Azure AD using NAV2017

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