Hello there.

Even though --print-mds' algo's are limited to those required/used by standard gpg operations, --print-md's apparently are not, yet there's nothing in the official documentation that hints towards this command accepting extraneous, usable digest options such as Tiger, Whirlpool, CRC32, MD4 (bad idea but still...) and God knows what else.

Just reporting in case this happens to be an oversight.

Best regards.