fix(auth): persist refreshed OAuth2 credentials to store#5350
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voidborne-d wants to merge 1 commit intogoogle:mainfrom
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fix(auth): persist refreshed OAuth2 credentials to store#5350voidborne-d wants to merge 1 commit intogoogle:mainfrom
voidborne-d wants to merge 1 commit intogoogle:mainfrom
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After `OAuth2CredentialRefresher.refresh()` rotates the tokens in memory, the updated credential was never written back to the credential store. On the next tool invocation, `get_credential()` deserialized the stale pre-refresh dict and returned expired tokens. For providers that rotate refresh_tokens on each refresh (Salesforce, many OIDC providers), this caused the subsequent refresh attempt to fail — the old refresh_token was already invalidated — forcing a full re-authorization flow. The fix calls `_store_credential()` immediately after a successful refresh so that the new access_token and refresh_token are persisted. Fixes google#5329
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Summary
After
OAuth2CredentialRefresher.refresh()rotates the tokens in memory, the updated credential was never written back to the credential store. On the next tool invocation,get_credential()deserializes the stale pre-refresh dict, getting expired tokens.For providers that rotate
refresh_tokenon each refresh (Salesforce, many OIDC providers), this causes the subsequent refresh attempt to fail — the oldrefresh_tokenhas already been invalidated — forcing a full re-authorization flow.Root cause
OAuth2CredentialRefresher.refresh()mutates theAuthCredentialobject in memory viaupdate_credential_with_tokens(). However,ToolContextCredentialStore.get_credential()deserializes a fresh Pydantic model from the stored dict on each call — the in-memory mutation is disconnected from the persisted state.The class already has a
_store_credential()method that serializes and writes totool_context.state. It is called after fetching new credentials from an auth response (line 332), but was missing after the refresh path.Fix
Call
self._store_credential(existing_credential)immediately after a successful refresh in_get_existing_credential()(1 line).Test
Added
test_refreshed_credential_is_persisted_to_store— verifies that after a token refresh, the credential store contains the newaccess_tokenandrefresh_token, not the stale ones.Fixes #5329