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-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
- "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
-<refentry id='pam_sm_authenticate'>
- <refmeta>
- <refentrytitle>pam_sm_authenticate</refentrytitle>
- <manvolnum>3</manvolnum>
- <refmiscinfo class='setdesc'>Linux-PAM Manual</refmiscinfo>
- </refmeta>
-
- <refnamediv id="pam_sm_authenticate-name">
- <refname>pam_sm_authenticate</refname>
- <refpurpose>PAM service function for user authentication</refpurpose>
- </refnamediv>
-
-<!-- body begins here -->
-
- <refsynopsisdiv>
- <funcsynopsis id='pam_sm_authenticate-synopsis'>
- <funcsynopsisinfo>#define PAM_SM_AUTH</funcsynopsisinfo>
- <funcsynopsisinfo>#include &lt;security/pam_modules.h&gt;</funcsynopsisinfo>
- <funcprototype>
- <funcdef>PAM_EXTERN int <function>pam_sm_authenticate</function></funcdef>
- <paramdef>pam_handle_t *<parameter>pamh</parameter></paramdef>
- <paramdef>int <parameter>flags</parameter></paramdef>
- <paramdef>int <parameter>argc</parameter></paramdef>
- <paramdef>const char **<parameter>argv</parameter></paramdef>
- </funcprototype>
- </funcsynopsis>
- </refsynopsisdiv>
-
-
- <refsect1 id='pam_sm_authenticate-description'>
- <title>DESCRIPTION</title>
- <para>
- The <function>pam_sm_authenticate</function> function is the service
- module's implementation of the
- <citerefentry>
- <refentrytitle>pam_authenticate</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry> interface.
- </para>
- <para>
- This function performs the task of authenticating the user.
- </para>
- <para>
- Valid flags, which may be logically OR'd with
- <emphasis>PAM_SILENT</emphasis>, are:
- </para>
- <variablelist>
- <varlistentry>
- <term>PAM_SILENT</term>
- <listitem>
- <para>
- Do not emit any messages.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>PAM_DISALLOW_NULL_AUTHTOK</term>
- <listitem>
- <para>
- Return <emphasis remap='B'>PAM_AUTH_ERR</emphasis> if the
- database of authentication tokens for this authentication
- mechanism has a <emphasis>NULL</emphasis> entry for the user.
- Without this flag, such a <emphasis>NULL</emphasis> token
- will lead to a success without the user being prompted.
- </para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
-
- <refsect1 id="pam_sm_authenticate-return_values">
- <title>RETURN VALUES</title>
- <variablelist>
- <varlistentry>
- <term>PAM_AUTH_ERR</term>
- <listitem>
- <para>
- Authentication failure.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>PAM_CRED_INSUFFICIENT</term>
- <listitem>
- <para>
- For some reason the application does not have sufficient
- credentials to authenticate the user.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>PAM_AUTHINFO_UNAVAIL</term>
- <listitem>
- <para>
- The modules were not able to access the authentication
- information. This might be due to a network or hardware
- failure etc.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>PAM_SUCCESS</term>
- <listitem>
- <para>
- The authentication token was successfully updated.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>PAM_USER_UNKNOWN</term>
- <listitem>
- <para>
- The supplied username is not known to the authentication
- service.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>PAM_MAXTRIES</term>
- <listitem>
- <para>
- One or more of the authentication modules has reached its
- limit of tries authenticating the user. Do not try again.
- </para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
-
- <refsect1 id='pam_sm_authenticate-see_also'>
- <title>SEE ALSO</title>
- <para>
- <citerefentry>
- <refentrytitle>pam</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>,
- <citerefentry>
- <refentrytitle>pam_authenticate</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>,
- <citerefentry>
- <refentrytitle>pam_sm_setcred</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>,
- <citerefentry>
- <refentrytitle>pam_strerror</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>,
- <citerefentry>
- <refentrytitle>PAM</refentrytitle><manvolnum>8</manvolnum>
- </citerefentry>
- </para>
- </refsect1>
-</refentry>