andyhuangdev commented on code in PR #11562:
URL: https://github.com/apache/ozone/pull/11562#discussion_r4301761324


##########
hadoop-ozone/s3gateway/src/main/java/org/apache/hadoop/ozone/s3/util/S3Utils.java:
##########
@@ -217,6 +217,13 @@ public static String validateSignatureHeader(HttpHeaders 
headers, String resourc
       throw ex;
     }
 
+    if (!hasUnsignedPayload(xAmzContentSha256Header) && 
!hasMultiChunksPayload(xAmzContentSha256Header)
+        && !xAmzContentSha256Header.matches("[0-9a-fA-F]{64}")) {

Review Comment:
   Agreed. I’ll normalize validated hex digests to lowercase in 
validateSignatureHeader, preserving the unsigned and streaming constants, and 
add upload tests for uppercase and mixed-case digests across regular, 
datastream, and multipart uploads.



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