Chung-En Lee created HDDS-17057:
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             Summary: Document S3 signed multi-chunks upload verification 
behavior and limitations
                 Key: HDDS-17057
                 URL: https://issues.apache.org/jira/browse/HDDS-17057
             Project: Apache Ozone
          Issue Type: Sub-task
            Reporter: Chung-En Lee


Draft a comprehensive document/design doc explaining how Apache Ozone handles 
S3 chunked uploads (signed multi-chunks payload verification), detailing the 
verification workflows, supported algorithms, and current limitations.


h4. *Key Points to Cover in the Doc*
 # *Verification Conditions & Behavior:*

 ** Clearly document *under which specific circumstances signature verification 
actually takes place* during chunked uploads (e.g., specific 
{{x-amz-content-sha256}} header types such as 
{{{}STREAMING-AWS4-HMAC-SHA256-PAYLOAD{}}}, presence of derived keys, payload 
vs. trailer verification).

 # *Algorithm Support & ECDSA Limitation:*

 ** *HMAC-SHA256:* Fully supported for chunk payload and trailer signature 
verification.

 ** *ECDSA (e.g., {{STREAMING-AWS4-ECDSA-P256-SHA256-PAYLOAD}} / SigV4a):*

 *** *Verification is currently NOT supported.*

 *** *Upload behavior:* Even though Ozone cannot verify ECDSA chunk signatures, 
*the upload will still succeed* without failing the request (payload is 
accepted/streamed, but signatures are not verified).



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