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Receiving 401 Unauthorized error on OAuth 1.0 using HMAC-SHA1 signature(ABAP)


I have a requirement to call a REST API using HMAC-SHA1 signature algorithm.

I have created API key on the server side and have below information to do the Auth request to retrieve data.

  • App key
  • Secret
  • Access token
  • Access token secret

I have implemented it in ABAP using the link and followed OAuth guidelines per . When I do the HTTP call from SAP, I get 401 Unauthorized from the server.

I know it is a bit hard to find the root cause but anybody faced this issue in the past?



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