scram-sha-256 password authentication fails

[nguiard]

Trying to connect with a scram-sha-256 password fails (error: password authentication failed for user "<user>"), while md5 works.

Environmnent:

• Debian 11
• Node 17
• pg 8.7.1
• PostgreSQL 13 or 14 (tested with both, fails with both)

Steps to reproduce:

• configure pg_hba to use scram-sha-256 authentication method
• reload/restart postgresql cluster
• with psql:
  • create user someuser password 'secret';
  • create database somedb owner someuser;
• try to connect to the database using psql: psql postgres://someuser:secret@localhost:5432/somedb
  • works
• try to connect to the database using node-postgres
  • fails, with error: password authentication failed for user "someuser"
• optionally, drop the db and user, then redo the same steps but with postgresql configured to use md5 instead, and verify that connecting works both for psql and node-postgres

[Androz2091]

any update?

[fozcode]

I had this issue too but I found this StackOverflow post that describes the additional procedure you have to follow before you can switch between md5 and scram-sha-256: https://stackoverflow.com/a/64317399/1671320

Essentially you have to change password_encryption in postgresql.conf and then update your Postgres user passwords and then enable scram-sha-256 in pg_hba.conf. Connections are working for me after this procedure.