google: Add support for OAuth2 token exchange over mTLS

With Context Aware Access enabled, users must use the endpoint "" for token exchange. This PR adds support for runtime configuration of the OAuth2 token endpoint (as determined by the caller). If using the mTLS oauth2 endpoint, the caller will also need to specify an mTLS-enabled HTTPClient via the "context" mechanism for use by the OAuth2 transport.

Change-Id: Ic83342ec1d224d3acdabf00d863249330424fc54
GitHub-Last-Rev: 07e4849e96a72028a8d6ff99b228846902f5bea6
GitHub-Pull-Request: golang/oauth2#630
Run-TryBot: Matthew Hickford <>
Reviewed-by: Shin Fan <>
Run-TryBot: Shin Fan <>
Reviewed-by: Matthew Hickford <>
Reviewed-by: Andy Zhao <>
TryBot-Result: Gopher Robot <>
2 files changed
tree: b8e54573bebb2a86e031fe07fb9fd2085e68f37f
  1. amazon/
  2. authhandler/
  3. bitbucket/
  4. cern/
  5. clientcredentials/
  6. endpoints/
  7. facebook/
  8. fitbit/
  9. foursquare/
  10. github/
  11. gitlab/
  12. google/
  13. heroku/
  14. hipchat/
  15. instagram/
  16. internal/
  17. jira/
  18. jws/
  19. jwt/
  20. kakao/
  21. linkedin/
  22. mailchimp/
  23. mailru/
  24. mediamath/
  25. microsoft/
  26. nokiahealth/
  27. odnoklassniki/
  28. paypal/
  29. slack/
  30. spotify/
  31. stackoverflow/
  32. twitch/
  33. uber/
  34. vk/
  35. yahoo/
  36. yandex/
  37. .travis.yml
  39. example_test.go
  40. go.mod
  41. go.sum
  43. oauth2.go
  44. oauth2_test.go
  46. token.go
  47. token_test.go
  48. transport.go
  49. transport_test.go

OAuth2 for Go

Go Reference Build Status

oauth2 package contains a client implementation for OAuth 2.0 spec.


go get

Or you can manually git clone the repository to $(go env GOPATH)/src/

See for further documentation and examples.

Policy for new packages

We no longer accept new provider-specific packages in this repo if all they do is add a single endpoint variable. If you just want to add a single endpoint, add it to the package.

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