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Chris LuandDevin
2d06e2d6c1
* s3: evaluate tag conditions on copy-source and tagging subresources Policy evaluation ran without the object entry on several paths, so a Deny conditioned on s3:ExistingObjectTag never matched: - CopyObject, UploadPartCopy and RenameObject checked the source key before its entry was fetched; repeat the check on a synthesized GET once the entry resolves. - GetObjectAttributes and Get/Put/DeleteObjectTagging never supplied the entry; recheck with the resolved entry. Generated with [Devin](https://devin.ai) Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com> * s3: fail closed on tag-policy lookups and honor tag-conditioned grants - recheckTagConditionedPolicyWithLookup returned success when the entry lookup errored, letting a tag-gated Deny slip past a transient miss; only ErrNotFound still falls through to the handler's own NoSuchKey. - A read or delete denied in the tagless first phase now gets one more evaluation with the resolved entry's tags in hand, so an s3:ExistingObjectTag-conditioned Allow can still grant a copy-source read or rename. The deferred recheck requires an explicit Allow; indeterminate results keep the original verdict, and the existence of the key never leaks past a deny. - RenameObject now applies the same tag-aware recheck to the source removal, so a tag-gated Deny on s3:DeleteObject blocks a rename the way it blocks a direct DELETE. - GetObjectAttributes evaluates the object-entry policy recheck before conditional headers, so a 304/412 response can no longer bypass a tag-based Deny. * s3: honor identity denies in the tag-aware source recheck The deferred recheck re-evaluates only the bucket policy, so a bucket Allow could lift an explicit Deny in the caller's attached or session policies on a copy/rename source. Apply the same applicable-policy Deny check the first phase uses. 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>