Why won't my Azure AD application allow an oauth client_credentials grant?
I want to use the Azure Graph API, but first I need an oauth token. To get the token, I am trying to use Microsoft.IdentityModel.Clients.ActiveDirectory aka ADAL version 1.0.3 (from NuGet).
I'm using the overload of AuthenticationContext.AcquireToken that takes a ClientCredential object. (I can't use the overload that prompts the user to login because I'm writing a service, not an app.)
I configured my Azure AD web application as described in various tutorials/samples (e.g. ADAL - Server to Server Authentication).
My code looks like:
AuthenticationContext ac = new AuthenticationContext("https://login.windows.net/thommmondago.onmicrosoft.com");
ClientCredential cc = new ClientCredential("41151135-61b8-40f4-aff7-8627e9eaf853", clientSecretKey);
AuthenticationResult result = ac.AcquireToken("https://graph.windows.net", cc);
The AcquireToken
line throws an exception:
sts_token_request_failed: Token request to security token service failed. Check InnerException for more details
The inner exception is a WebException, and the response received looks like an oauth error:
{ "error":"invalid_client",
"error_description":"ACS50012: Authentication failed."
"error_codes":[50012],
"timestamp":"2014-03-17 12:26:19Z",
"trace_id":"a4ee6702-e07b-40f7-8248-589e49e96a8d",
"correlation_id":"b304af2e-2748-4067-99d0-2d7e55b121cd" }
Bypassing ADAL and using curl with the oauth endpoint also gives the same error.
My code works if I use the details of the Azure application that I found here:
AuthenticationContext ac = new AuthenticationContext("https://login.windows.net/graphDir1.onmicrosoft.com");
ClientCredential cc = new ClientCredential("b3b1fc59-84b8-4400-a715-ea8a7e40f4fe", "FStnXT1QON84B5o38aEmFdlNhEnYtzJ91Gg/JH/Jxiw=");
AuthenticationResult result = ac.AcquireToken("https://graph.windows.net", cc);
So it's not an error with my code. I think it's either an error with my Azure AD, or I've got the ClientCredential parameters wrong.