title: Jenkins get sha256 for an artifact
body: <p>I would like to download an artifact from a Jenkins job. While this is straight-forward, I also, in advance, need a sha256 of the artifact but could not find a way yet, to retrieve it.</p>
  
  <p>So question is - is there any way to get the hash or at least a way to upload the sha256, so it directly gets exposed by the REST API?</p>
  
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  <p>Caveat - I have artifacts above 1GB, as such I do not want to manually generate the sha256 in the Job, but have it processed <s>"offline"</s> somewhere not impacting Job time.</p>