Faced, very likely, same issue on Debian Buster with
pure-ftpd-postgresql version 1.0.47-3. My pure-ftpd is configured via
SaltStack so configuration is exactly the same between hosts, but after
setting up new Debian 10 host and rolling out my SaltStack config on it,
I found that authentication always fails.
What does not help:
* I checked PostgreSQL queries from pure-ftpd to PostgreSQL with
tcpdump and found that they are exactly same as on old Debian 9 host.
* I tried switching to cleartext "encryption" and supply md5 hash as a
password in ftp client - no luck
What proves that the problem is caused by Buster packages (in my case
version 1.0.47-3):
* I've installed packages v. 1.0.43-3 from Stretch to Buster and with
same config files everything work flawlessly.
What helped:
* I've changed 'PGSQLCrypt' from 'md5' to 'any' and everything start
to work as expected with Buster version 1.0.47-3 packages.
--
Roman
