* fix(s3): populate s3:prefix from query param for ListObjects policy conditions (#8969)
ListObjectsV2/V1 requests with prefix-restricted STS session policies
were denied because:
1. s3:prefix was derived from objectKey, which the auth middleware set to
the prefix value, but the resource ARN then included the prefix
(e.g. arn:aws:s3:::bucket/prefix) instead of staying at bucket level
(arn:aws:s3:::bucket) as AWS requires for ListBucket.
2. When objectKey was empty (no middleware propagation), s3:prefix was
never populated from the query parameter at all.
Now AuthorizeAction extracts the prefix query parameter directly, sets it
as s3:prefix in the request context, and uses a bucket-level resource ARN
when the objectKey matches the propagated prefix.
* fix(s3): use AWS-style wildcard matching for StringLike policy conditions
filepath.Match treats * as not matching /, which breaks IAM StringLike
conditions on paths (e.g. arn:aws:s3:::bucket/* won't match nested keys).
Replace with a case-sensitive variant of AwsWildcardMatch that correctly
treats * as matching any character including /.
* refactor(s3): replace regex wildcard matching with string-based matcher
Use the existing wildcard.MatchesWildcard utility instead of compiling
and caching regexes for IAM wildcard matching. Removes the regexCache,
its mutex, and the sync import.
* refactor(s3): inline and remove AwsWildcardMatch wrapper functions
Replace all call sites with direct wildcard.MatchesWildcard calls.
* fix(s3): scope s3:prefix condition key to list operations only
The s3:prefix logic was running for all actions, so a GetObject on
"foo/bar" would wrongly populate s3:prefix. Restrict it to action "List"
and always reset resourceObjectKey to "" so the resource ARN stays at
bucket level. Also set s3:prefix to "" when no prefix is provided, so
policies with StringEquals {"s3:prefix": ""} evaluate correctly.
see https://blog.aqwari.net/xml-schema-go/
1. go get aqwari.net/xml/cmd/xsdgen
2. Add EncodingType element for ListBucketResult in AmazonS3.xsd
3. xsdgen -o s3api_xsd_generated.go -pkg s3api AmazonS3.xsd
4. Remove empty Grantee struct in s3api_xsd_generated.go
5. Remove xmlns: sed s'/http:\/\/s3.amazonaws.com\/doc\/2006-03-01\/\ //' s3api_xsd_generated.go
Chris Lu
79a48256f5