fix (htpasswd): restrict password==hash acceptance #821
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For htpasswd entries where hash is an actual valid hash (SHA etc.), the hash itself should not be accepted as password. Otherwise, obtaining the htpasswd file gives an attacker access to all accounts withoutneeding to crack/reverse hashes. This commit tries to ensure that hash==password is only accepted if hash is not a valid hash (plaintext password fallback).
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For htpasswd entries where hash is an actual valid hash (SHA etc.), the hash itself should not be accepted as password. Otherwise, obtaining the htpasswd file gives an attacker access to all accounts withoutneeding to crack/reverse hashes.
This commit tries to ensure that hash==password is only accepted if hash is not a valid hash (plaintext password fallback).