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Chris LuandGitHub
7129e1178e
* s3: evaluate bucket policy before ACL public-read for anonymous requests AuthWithPublicRead granted anonymous access on a public-read ACL before consulting the bucket policy, so an explicit Deny (e.g. s3:ListBucket) was skipped for anonymous callers while still enforced for authenticated ones. Run the policy engine first: a matching Deny or Allow is honored, otherwise fall through to the ACL grant as before. * s3: defer object-level anonymous requests to the handler's policy recheck Evaluating the bucket policy with a nil entry at middleware time makes tag conditions like s3:ExistingObjectTag/<key> resolve against missing values, so a conditional Deny could wrongly block anonymous Get/Head on a public bucket whose handler recheck would permit it. Object requests now take the ACL grant and let Get/HeadObjectHandler re-evaluate with the fetched entry; only bucket-level requests (List, HeadBucket), which have no such recheck, are decided by the middleware policy verdict. Reading the bucket config first also refreshes the compiled policy on a cache miss, so a remotely deleted policy cannot leave a stale verdict in the engine for nonresident buckets. * s3: recheck bucket policy before serving directory objects handleDirectoryObjectRequest runs before the object handlers' policy recheck, so directory content on a public-read bucket was served to anonymous callers without any policy evaluation. Evaluate the policy with the directory entry, matching the recheck the file path performs.