* Fix STS authorization in streaming/chunked uploads
During streaming/chunked uploads (SigV4 streaming), authorization happens
twice:
1. Initial authorization in authRequestWithAuthType() - works correctly
2. Second authorization in verifyV4Signature() - was failing for STS
The issue was that verifyV4Signature() only used identity.canDo() for
permission checks, which always denies STS identities (they have empty
Actions). This bypassed IAM authorization completely.
This commit makes verifyV4Signature() IAM-aware by adding the same
fallback logic used in authRequestWithAuthType():
- Traditional identities (with Actions) use legacy canDo() check
- STS/JWT identities (empty Actions) fall back to IAM authorization
Fixes: https://github.com/seaweedfs/seaweedfs/pull/7986#issuecomment-3723196038
* Add comprehensive unit tests for STS authorization in streaming uploads
Created test suite to verify that verifyV4Signature properly handles STS
identities by falling back to IAM authorization when shouldCheckPermissions
is true.
Tests cover:
- STS identities with IAM integration (allow and deny cases)
- STS identities without IAM integration (should deny)
- Traditional identities with Actions (canDo check)
- Permission check bypass when shouldCheckPermissions=false
- Specific streaming upload scenario from bug report
- Action determination based on HTTP method
All tests pass successfully.
* Refactor authorization logic to avoid duplication
Centralized the authorization logic into IdentityAccessManagement.VerifyActionPermission.
Updated auth_signature_v4.go and auth_credentials.go to use this new helper.
Updated tests to clarify that they mirror the centralized logic.
* Refactor tests to use VerifyActionPermission directly
Introduced IAMIntegration interface to facilitate mocking of internal IAM integration logic.
Updated IdentityAccessManagement to use the interface.
Updated tests to directy call VerifyActionPermission using a mocked IAM integration, eliminating duplicated logic in tests.
* fix(s3api): ensure static config file takes precedence and refactor tests
- Track if configuration was loaded from a static file using `useStaticConfig`.
- Ignore filer-based IAM updates when a static configuration is in use to respect "Highest Priority" rule.
- Refactor `TestVerifyV4SignatureWithSTSIdentity` to use `VerifyActionPermission` directly.
- Fix typed nil interface panic in authorization test.
abfa64456b