Smart Backend Services - Invalid Client - OAuth2.0

[tejinder...@gmail.com]

Hello Everyone ,

Hope you all are doing good and safe !!

 

I am facing below error while Using a JWT to Obtain an Access Token for a Backend Service using OAuth2.0.

below is the error in response.

{

  "error": "invalid_client",

  "error_description": null

}

I am using Smart backend services using oauth2.0 and I am following this link https://apporchard.epic.com/Article?docId=oauth2&section=BackendOAuth2Guide.

 

I created a pair of private and public keys using openssl.

 

below is the body I passed as ` .

application/x-www-form-urlencoded`

grant_type=client_credentials&client_assertion_type=urn%3Aietf%3Aparams%3Aoauth%3Aclient-assertion-type%3Ajwt-bearer&client_assertion=eyJhbGciOiJSUzM4NCIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJmYWQwMmFhZS1hY2Q1LTQyZmEtYTkzOS00ZTg3ZjMwNGEwMWQiLCJzdWIiOiJmYWQwMmFhZS1hY2Q1LTQyZmEtYTkzOS00ZTg3ZjMwNGEwMWQiLCJhdWQiOiJodHRwczovL2FwcG9yY2hhcmQuZXBpYy5jb20vaW50ZXJjb25uZWN0LWFvY3VycHJkLW9hdXRoL29hdXRoMi90b2tlbiIsImp0aSI6ImRhZWUxZmU4LWU4ZGUtNGU2OC1iNWNjLTE2ZDE4ZDlkMTI1OCIsImV4cCI6MTU5OTIzMjQ5NSwibmJmIjoxNTk5MjMyMTk1LCJpYXQiOjE1OTkyMzIxOTV9.peu9W8-pthB6HawokShFwQUUQr-a2w0bnI-krjQ1p2b-wjfxrgR1hW8heLGIDKsDQVa2HZx1yIh1zrXN_nkI6Q4ZLuBX7RchQjJD9pMpM6X9ErvknLVeFe__nopODuMp7J5NAa6G6Xq3rYDZVRvw1jtbtKI0Wu1S7JIORIAKhM90n8mpOfQrR7Pyt9QnxLZjbQLeqQVwUYsZ088-LVVj9esOaQJ9FcC5ySaC6pg61va1Uxbe-JsAiIr2kbTpU7DUkQcZvAax8t2Stb22vgWTTzcdwp1igqpoEY-U2dY2o3doUAi4cCtmitrYHgkH1mcWrQ8fsLQHAM2sV9qn4P9erg

below is my token description:-

{

  "alg": "RS384",

  "typ": "JWT"

}

{

  "iss": "fad02aae-acd5-42fa-a939-4e87f304a01d",

  "sub": "fad02aae-acd5-42fa-a939-4e87f304a01d",

  "aud": "https://apporchard.epic.com/interconnect-aocurprd-oauth/oauth2/token",

  "jti": "daee1fe8-e8de-4e68-b5cc-16d18d9d1258",

  "exp": 1599232495,

  "nbf": 1599232195,

  "iat": 1599232195

}

all the above info is being used to create a token. I tried many times but no luck. Please help.

 

Thanks

[Sandra Anoop]

Hi Tej,

Hope you are doing good and safe.

Could you please tell me if you were able to have success in the backend services integration?

Thanks,

Sandra

[Paul Nelson]

Sandra, Tej and everyone,

Greetings, I am also planning to move my OAuth2.0 to the backend. Could you please point me toward some examples and/or documentation? Any help is very much appreciated. Thanks.

P

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[Josh Mandel]

Can you clarify what specifically you're aiming to do, and what kind of examples you're looking for? I'm recording a series of "guided walk" videos and looking for topics that will be helpful for the community.

Best,

Josh

To view this discussion on the web visit https://groups.google.com/d/msgid/smart-on-fhir/CAArzn8g%3D3Ni6k0yUU64vV98Yh1ZRNRsKTivwm2NKKahkzAnqkg%40mail.gmail.com.

[Sandra Anoop]

Hi Josh, 

Thanks for replying! Please find the post below about the issue. Could you please go through and  let me know if you have faced any similar issue. 
https://groups.google.com/u/1/g/smart-on-fhir/c/2mxGLywulIQ