pcgrenier commented on issue #3604: NIFI-6255 NIFI-6287: Hash function for expression language and record… URL: https://github.com/apache/nifi/pull/3604#issuecomment-515164310 > I don't think the error has to explicitly list all the available options, but I think the docs should. The error can just reference the docs to let people know where the definitive list is. > > The list of supported algorithms does not change frequently, and the docs can be updated in the event the list changes. > > There are some examples of our current hash usage in [`HashService`](https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/security/util/crypto/HashService.java#L59) and [`HashAlgorithm`](https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/security/util/crypto/HashAlgorithm.java). I believe in the docs for `CryptographicHashContent` the possible values are enumerated even though it's a drop-down list in the processor configuration rather than a freeform text field. Ok, I added the list dynamically to the error message, also to the docs.
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