entirely unrelated. has nothing to do with pipe and stdin.
also your problems are PEBCAK as far as I can tell
example hashes are here: https://hashcat.net/wiki/example_hashes you always need to specify -m x (where x is the hash type).
it's definitely PEBCAK, because -m 2501 is using pairwise master key (PMK) and of course this key has fixed length (32 bytes or 64 hexadecimal characters). a fixed size key is of course of fixed size. what else should it be ? 64 (hex chars) min and 64 (hex chars) max is perfectly fine for PMK
also your problems are PEBCAK as far as I can tell
example hashes are here: https://hashcat.net/wiki/example_hashes you always need to specify -m x (where x is the hash type).
it's definitely PEBCAK, because -m 2501 is using pairwise master key (PMK) and of course this key has fixed length (32 bytes or 64 hexadecimal characters). a fixed size key is of course of fixed size. what else should it be ? 64 (hex chars) min and 64 (hex chars) max is perfectly fine for PMK