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Chris LuandDevin
e442eda88e
* s3: authorize POST policy uploads through the shared object check doesPolicySignatureMatch gated a verified POST Object signature on the identity's legacy Write action, which cannot represent attached IAM policies, STS session policies, or key-scoped grants. Users authorized only by an attached policy (e.g. s3:PutObject on bucket/*) were denied with AccessDenied even though the equivalent PUT succeeds. The handler already runs AuthorizeObjectWrite against the real object key after the form's x-amz-* fields are promoted to headers, so the coarse check only shadowed the full evaluation. Signature verification now just returns the identity; authorization stays in one place. Generated with [Devin](https://devin.ai) Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com> * test: POST Object authorizes attached-policy identities, still denies others Cover the signature check and AuthorizeObjectWrite for an identity whose only write grant comes from an attached IAM policy, plus the deny leg for an identity whose attached policy omits s3:PutObject. Generated with [Devin](https://devin.ai) Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com> --------- Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>