<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" 
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">

<section id="auth_db.parameters" xmlns:xi="http://www.w3.org/2001/XInclude">
    <sectioninfo>
	<revhistory>
	    <revision>
		<revnumber>$Revision: 1.3 $</revnumber>
		<date>$Date: 2005/08/24 22:26:17 $</date>
	    </revision>
	</revhistory>
    </sectioninfo>

    <title>Parameters</title>

    <section id="auth_db.db_url">
	<title><varname>db_url</varname> (string)</title>
	<para>
	    This is URL of the database to be used. Value of the parameter
	    depends on the database module used. For example for mysql and
	    postgres modules this is something like
	    mysql://username:password@host:port/database. For dbtext module
	    (which stores data in plaintext files) it is directory in which the
	    database resides.
	</para>
	<para>
	    Default value is "mysql://serro:47serro11@localhost/ser".
	</para>
	<example>
	    <title><varname>db_url</varname> parameter usage</title>
	    <programlisting>
modparam("auth_db", "db_url", "mysql://foo:bar@foobar.org/ser")
	    </programlisting>
	</example>
    </section>
    
    <section id="user_column">
	<title><varname>user_column</varname> (string)</title>
	<para>
	    This is the name of the column holding usernames. Default value is
	    fine for most people. Use the parameter if you really need to
	    change it.
	</para>
	<para>
	    Default value is "username".
	</para>

	<example>
	    <title><varname>user_column</varname> usage</title>
	    <programlisting>
modparam("auth_db", "user_column", "user")
	    </programlisting>
	</example>
    </section>

    <section id="domain_column">
	<title><varname>domain_column</varname> (string)</title>
	<para>
	    This is the name of the column holding domains of users. Default
	    value is fine for most people. Use the parameter if you really need
	    to change it.
	</para>
	<para>
	    Default value is "domain".
	</para>
	<example>
	    <title><varname>domain_column</varname> usage</title>
	    <programlisting>
modparam("auth_db", "domain_column", "domain")
	    </programlisting>
	</example>
    </section>

    <section id="password_column">
	<title><varname>password_column</varname> (string)</title>
	<para>
	    This is the name of the column holding passwords. Passwords can be
	    either stored as plain text or pre-calculated HA1 strings. HA1
	    strings are MD5 hashes of username, password, and realm. HA1
	    strings are more safe because the server doesn't need to know
	    plaintext passwords and they cannot be obtained from HA1 strings.
	</para>
	<para>
	    Default value is "ha1".
	</para>
	<example>
	    <title><varname>password_column</varname> usage</title>
	    <programlisting>
modparam("auth_db", "password_column", "password")
	    </programlisting>
	    </example>
    </section>

    <section id="rpid_column">
	<title><varname>rpid_column</varname> (string)</title>
	<para>
	    This is the name of the column holding information for the
	    Remote-Party-ID header field. Default value is fine for most
	    people. Use the parameter if you really need to change it.
	</para>
	<para>
	    Default value is "rpid".
	</para>
	<example>
	    <title><varname>rpid_column</varname> usage</title>
	    <programlisting>
modparam("auth_db", "rpid_column", "remote_party_id")
	    </programlisting>
	</example>
    </section>

    <section id="calculate_ha1">
	<title><varname>calculate_ha1</varname> (integer)</title>
	<para>
	    This parameter tells server whether it should expect plaintext
	    passwords in the database or HA1 string. If the parameter is set to
	    1 then the server will assume that the column pointed to by
	    <varname>password_column</varname> contains plaintext passwords and
	    it will calculate HA1 strings on the fly.
	</para>
	<para>
	    If the parameter is set to 0 then the server assumes that the
	    database contains HA1 strings directly and will not calculate
	    them. If username parameter of credentials contains also @domain
	    (some user agents put domain in username parameter), then column
	    pointed to by <varname>password_column_2</varname> parameter will
	    be used instead. This column should also contain HA1 strings but
	    they should be calculated including the domain in the username
	    parameter (as opposed to <varname>password_column</varname> which
	    (when containing HA1 strings) should always contains HA1 strings
	    calculated without domain in username.
	</para>
	<para>
	    This ensures that the authentication will always work when using
	    pre-calculated HA1 string, not depending on the presence of the
	    domain in username.
	</para>
	<para>
	    Default value of this parameter is 0.
	</para>
	<example>
	    <title><varname>calculate_ha1</varname>usage</title>
	    <programlisting>
modparam("auth_db", "calculate_ha1", 1)
	    </programlisting>
	</example>
    </section>

    <section id="password_column_2">
	<title><varname>password_column_2</varname> (string)</title>
	<para>
	    As described in the previous section this parameter contains name
	    of column holding pre-calculated HA1 string that were calculated
	    including the domain in the username. This parameter is used only
	    when <varname>calculate_ha1</varname> is set to 0 and user agent
	    send a credentials containing the domain in the username.
	</para>
	<para>
	    Default value of the parameter is ha1b.
	</para>
	<example>
	    <title><varname>password_column_2</varname> usage</title>
	    <programlisting>
modparam("auth_db", "password_column_2", "ha1_2")
	    </programlisting>
	</example>
    </section>

    <section id="use_rpid">
	<title><varname>use_rpid</varname> (integer)</title>
	<para>
	    This parameter specifies whether the server should fetch a value
	    for the Remote-Party-ID header field from the database.
	</para>
	<para>
	    If the parameter is set to 1 the server expects to find a value for
	    this header in the column specified by the
	    <varname>rpid_column</varname> parameter.
	</para>
	<para>
	    Default value of this parameter is 0.
	</para>
	<example>
	    <title><varname>use_rpid</varname>usage</title>
	    <programlisting>
modparam("auth_db", "use_rpid", 1)
	    </programlisting>
	</example>
    </section>
</section>
