Re: Master user and non-plaintext auth does not work

[Patrick Domack]

Quoting SATOH Fumiyasu <fumi...@osstech.jp>:
I want to use CRAM-MD5 or DIGEST-MD5 (non-plaintext) authentication
for master users, but Dovecot 2.2.13 rejects it with the following log:

  auth_mechanisms = plain login cram-md5 digest-md5
  disable_plaintext_auth = yes
  auth_master_user_separator = %

  passdb {
    driver = passwd-file
    args = /etc/dovecot/passwd.masterusers
    master = yes
    pass = yes
  }

  # don't work too
  #passdb {
  #  driver = checkpassword
  #  args = /opt/osstech/etc/dovecot/checkpassword.masterusers
  #  master = yes
  #  pass = yes
  #}

  passdb {
    driver = ldap
    args = /etc/dovecot/dovecot-ldap.conf.ext
  }

Is this a bug or a restriction of Dovecot?

This is a restriction of CRAM-MD5 and DIGEST-MD5
They require plaintext passwords, you can't use password hashes on the  
server if you wish to use them. Or you have to use the special  
cram/digest-md5 password hash format.

There is nothing really to be gained from using these formats, it's  
just better to require TLS.