Courier Authentication Library
Download: http://www.courier-mta.org/download.html#authlib
Overview
The Courier authentication library provides authentication
services for other Courier applications. In this context, the
term "authentication" refers to the following functions:
- Take a userid or a loginid, and a password. Determine
whether the loginid and the password are valid.
- Given a userid, obtain the following information about the
userid:
- The account's home directory.
- The numeric system userid and groupid that owns all
files associated with this account.
- The location of the account's maildir.
- Any maildir quota defined for this account. See the
Courier documentation for more information on maildir
quotas.
- Other miscellaneous account-specific options.
- Change the password associated with a loginid.
- Obtain a complete list of all login ids.
The Courier authentication library provides alternative
implementations of these authentication services:
- Use the traditional system password files:
/etc/passwd
and /etc/shadow
, possibly
in conjunction with the PAM library.
- Maintain all this information in a GDBM or a DB database.
The GDBM or the DB database is compiled from plain text files.
Perl scripts provide a simple interface for creating and
editing the authentication information, then a script compiles
the plain text files into a database.
- Use an LDAP server for authentication.
- Use a table in a MySQL database for authentication.
- Use a table in a PostgreSQL database for
authentication.
- Use a table in an SQLite file for authentication.
All Courier components that use this authentication library,
therefore, will be able to authenticate E-mail accounts using any
of the above methods.
Additional information can be found in the INSTALL file.
The authentication API is documented.
Further resources
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