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-515143135 > Thanks for contributing this functionality. My only question is what happens when the user provides an unsupported algorithm name or doesn't format it explicitly as supported by Java's `MessageDigest`? Can we improve the messaging in the errors and provide an enumerated list of the exact strings to use in the documentation for both Expression Language and RecordPath syntax? as is it returns an error, saying unsupported algorithm name: the_name given. Does the list change? [message digest docs](https://docs.oracle.com/javase/7/docs/technotes/guides/security/StandardNames.html#MessageDigest). Because I would have to update the list to match the java version. The alternative is a utility class to pull the security providers out and list them in the error message.
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