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diff --git a/docs/docbook/projdoc/passdb.sgml b/docs/docbook/projdoc/passdb.sgml new file mode 100644 index 0000000000..fa2d75bd34 --- /dev/null +++ b/docs/docbook/projdoc/passdb.sgml @@ -0,0 +1,1012 @@ +<chapter id="passdb"> +<chapterinfo> + <author> + <firstname>Jelmer</firstname><surname>Vernooij</surname> + <affiliation> + <orgname>The Samba Team</orgname> + <address><email>jelmer@samba.org</email></address> + </affiliation> + </author> + <author> + <firstname>Gerald (Jerry)</firstname><surname>Carter</surname> + <affiliation> + <orgname>Samba Team</orgname> + <address><email>jerry@samba.org</email></address> + </affiliation> + </author> + <author> + <firstname>Olivier (lem)</firstname><surname>Lemaire</surname> + <affiliation> + <orgname>IDEALX</orgname> + <address><email>olem@IDEALX.org</email></address> + </affiliation> + </author> + <author> + <firstname>Jeremy</firstname><surname>Allison</surname> + <affiliation> + <orgname>Samba Team</orgname> + <address> + <email>jra@samba.org</email> + </address> + </affiliation> + </author> + <author> + <firstname>John H</firstname><surname>Terpstra</surname> + <affiliation> + <orgname>Samba Team</orgname> + <address> + <email>jht@samba.org</email> + </address> + </affiliation> + </author> + + <pubdate>February 2003</pubdate> +</chapterinfo> + +<title>User information database</title> + +<sect1> + <title>Introduction</title> + + <para>Old windows clients send plain text passwords over the wire. + Samba can check these passwords by crypting them and comparing them + to the hash stored in the unix user database. + </para> + + <para> + Newer windows clients send encrypted passwords (so-called + Lanman and NT hashes) over + the wire, instead of plain text passwords. The newest clients + will only send encrypted passwords and refuse to send plain text + passwords, unless their registry is tweaked. + </para> + + <para>These passwords can't be converted to unix style encrypted + passwords. Because of that you can't use the standard unix + user database, and you have to store the Lanman and NT hashes + somewhere else. </para> + + <para>Next to a differently encrypted passwords, + windows also stores certain data for each user + that is not stored in a unix user database, e.g. + workstations the user may logon from, the location where his/her + profile is stored, etc. + Samba retrieves and stores this information using a "passdb backend". + Commonly + available backends are LDAP, plain text file, MySQL and nisplus. + For more information, see the documentation about the + <command>passdb backend = </command> parameter. + </para> +</sect1> + +<sect1> + <title>Important Notes About Security</title> + + <para>The unix and SMB password encryption techniques seem similar + on the surface. This similarity is, however, only skin deep. The unix + scheme typically sends clear text passwords over the network when + logging in. This is bad. The SMB encryption scheme never sends the + cleartext password over the network but it does store the 16 byte + hashed values on disk. This is also bad. Why? Because the 16 byte hashed + values are a "password equivalent". You cannot derive the user's + password from them, but they could potentially be used in a modified + client to gain access to a server. This would require considerable + technical knowledge on behalf of the attacker but is perfectly possible. + You should thus treat the data stored in whatever + passdb backend you use (smbpasswd file, ldap, mysql) as though it contained the + cleartext passwords of all your users. Its contents must be kept + secret, and the file should be protected accordingly.</para> + + <para>Ideally we would like a password scheme which neither requires + plain text passwords on the net or on disk. Unfortunately this + is not available as Samba is stuck with being compatible with + other SMB systems (WinNT, WfWg, Win95 etc). </para> + + <warning> + <para>Note that Windows NT 4.0 Service pack 3 changed the + default for permissible authentication so that plaintext + passwords are <emphasis>never</emphasis> sent over the wire. + The solution to this is either to switch to encrypted passwords + with Samba or edit the Windows NT registry to re-enable plaintext + passwords. See the document WinNT.txt for details on how to do + this.</para> + + <para>Other Microsoft operating systems which also exhibit + this behavior includes</para> + + <para> These versions of MS Windows do not support full domain + security protocols, although they may log onto a domain environment. + Of these Only MS Windows XP Home does NOT support domain logons.</para> + + <simplelist> + <member>MS DOS Network client 3.0 with + the basic network redirector installed</member> + + <member>Windows 95 with the network redirector + update installed</member> + + <member>Windows 98 [se]</member> + + <member>Windows Me</member> + + <member>Windows XP Home</member> + </simplelist> + + <para> The following versions of MS Windows fully support domain + security protocols.</para> + + <simplelist> + <member>Windows NT 3.5x</member> + + <member>Windows NT 4.0</member> + + <member>Windows 2000 Professional</member> + + <member>Windows 200x Server/Advanced Server</member> + + <member>Windows XP Professional</member> + </simplelist> + + <para><emphasis>Note :</emphasis>All current release of + Microsoft SMB/CIFS clients support authentication via the + SMB Challenge/Response mechanism described here. Enabling + clear text authentication does not disable the ability + of the client to participate in encrypted authentication.</para> + + + <para>MS Windows clients will cache the encrypted password alone. + Even when plain text passwords are re-enabled, through the appropriate + registry change, the plain text password is NEVER cached. This means that + in the event that a network connections should become disconnected (broken) + only the cached (encrypted) password will be sent to the resource server + to affect a auto-reconnect. If the resource server does not support encrypted + passwords the auto-reconnect will fail. <emphasis>USE OF ENCRYPTED PASSWORDS + IS STRONGLY ADVISED.</emphasis></para> + </warning> + + <sect2> + <title>Advantages of SMB Encryption</title> + + <simplelist> + <member>Plain text passwords are not passed across + the network. Someone using a network sniffer cannot just + record passwords going to the SMB server.</member> + + <member>WinNT doesn't like talking to a server + that SM not support encrypted passwords. It will refuse + to browse the server if the server is also in user level + security mode. It will insist on prompting the user for the + password on each connection, which is very annoying. The + only things you can do to stop this is to use SMB encryption. + </member> + + <member>Encrypted password support allows auto-matic share + (resource) reconnects.</member> + </simplelist> + </sect2> + + + <sect2> + <title>Advantages of non-encrypted passwords</title> + + <simplelist> + <member>Plain text passwords are not kept + on disk, and are NOT cached in memory. </member> + + <member>Uses same password file as other unix + services such as login and ftp</member> + + <member>Use of other services (such as telnet and ftp) which + send plain text passwords over the net, so sending them for SMB + isn't such a big deal.</member> + </simplelist> + </sect2> +</sect1> + + +<sect1> + <title>The smbpasswd Command</title> + + <para>The smbpasswd utility is a utility similar to the + <command>passwd</command> or <command>yppasswd</command> programs. + It maintains the two 32 byte password fields in the passdb backend. </para> + + <para><command>smbpasswd</command> works in a client-server mode + where it contacts the local smbd to change the user's password on its + behalf. This has enormous benefits - as follows.</para> + + <para><command>smbpasswd</command> has the capability + to change passwords on Windows NT servers (this only works when + the request is sent to the NT Primary Domain Controller if you + are changing an NT Domain user's password).</para> + + <para>To run smbpasswd as a normal user just type :</para> + + <para><prompt>$ </prompt><userinput>smbpasswd</userinput></para> + <para><prompt>Old SMB password: </prompt><userinput><type old value here - + or hit return if there was no old password></userinput></para> + <para><prompt>New SMB Password: </prompt><userinput><type new value> + </userinput></para> + <para><prompt>Repeat New SMB Password: </prompt><userinput><re-type new value + </userinput></para> + + <para>If the old value does not match the current value stored for + that user, or the two new values do not match each other, then the + password will not be changed.</para> + + <para>If invoked by an ordinary user it will only allow the user + to change his or her own Samba password.</para> + + <para>If run by the root user smbpasswd may take an optional + argument, specifying the user name whose SMB password you wish to + change. Note that when run as root smbpasswd does not prompt for + or check the old password value, thus allowing root to set passwords + for users who have forgotten their passwords.</para> + + <para><command>smbpasswd</command> is designed to work in the same way + and be familiar to UNIX users who use the <command>passwd</command> or + <command>yppasswd</command> commands.</para> + + <para>For more details on using <command>smbpasswd</command> refer + to the man page which will always be the definitive reference.</para> +</sect1> + +<!-- +<sect1> +<title>The <command>pdbedit</command> command</title> +FIXME +</sect1> +--> + +<sect1> +<title>Plain text</title> +<para> +Older versions of samba retrieved user information from the unix user database +and eventually some other fields from the file <filename>/etc/samba/smbpasswd</filename> +or <filename>/etc/smbpasswd</filename>. When password encryption is disabled, no +data is stored at all. +</para> +</sect1> + +<sect1> +<title>TDB</title> +<para>Samba can also store the user data in a "TDB" (Trivial Database). Using this backend +doesn't require any additional configuration. This backend is recommended for new installations who +don't require LDAP. +</para> +</sect1> + +<sect1> +<title>LDAP</title> + +<sect2> +<title>Introduction</title> + +<para> +This document describes how to use an LDAP directory for storing Samba user +account information traditionally stored in the smbpasswd(5) file. It is +assumed that the reader already has a basic understanding of LDAP concepts +and has a working directory server already installed. For more information +on LDAP architectures and Directories, please refer to the following sites. +</para> + +<itemizedlist> + <listitem><para>OpenLDAP - <ulink url="http://www.openldap.org/">http://www.openldap.org/</ulink></para></listitem> + <listitem><para>iPlanet Directory Server - <ulink url="http://iplanet.netscape.com/directory">http://iplanet.netscape.com/directory</ulink></para></listitem> +</itemizedlist> + +<para> +Note that <ulink url="http://www.ora.com/">O'Reilly Publishing</ulink> is working on +a guide to LDAP for System Administrators which has a planned release date of +early summer, 2002. +</para> + +<para> +Two additional Samba resources which may prove to be helpful are +</para> + +<itemizedlist> + <listitem><para>The <ulink url="http://www.unav.es/cti/ldap-smb/ldap-smb-3-howto.html">Samba-PDC-LDAP-HOWTO</ulink> + maintained by Ignacio Coupeau.</para></listitem> + + <listitem><para>The NT migration scripts from <ulink url="http://samba.idealx.org/">IDEALX</ulink> that are + geared to manage users and group in such a Samba-LDAP Domain Controller configuration. + </para></listitem> +</itemizedlist> + +</sect2> + +<sect2> +<title>Introduction</title> + +<para> +Traditionally, when configuring <ulink url="smb.conf.5.html#ENCRYPTPASSWORDS">"encrypt +passwords = yes"</ulink> in Samba's <filename>smb.conf</filename> file, user account +information such as username, LM/NT password hashes, password change times, and account +flags have been stored in the <filename>smbpasswd(5)</filename> file. There are several +disadvantages to this approach for sites with very large numbers of users (counted +in the thousands). +</para> + +<itemizedlist> +<listitem><para> +The first is that all lookups must be performed sequentially. Given that +there are approximately two lookups per domain logon (one for a normal +session connection such as when mapping a network drive or printer), this +is a performance bottleneck for lareg sites. What is needed is an indexed approach +such as is used in databases. +</para></listitem> + +<listitem><para> +The second problem is that administrators who desired to replicate a +smbpasswd file to more than one Samba server were left to use external +tools such as <command>rsync(1)</command> and <command>ssh(1)</command> +and wrote custom, in-house scripts. +</para></listitem> + +<listitem><para> +And finally, the amount of information which is stored in an +smbpasswd entry leaves no room for additional attributes such as +a home directory, password expiration time, or even a Relative +Identified (RID). +</para></listitem> +</itemizedlist> + +<para> +As a result of these defeciencies, a more robust means of storing user attributes +used by smbd was developed. The API which defines access to user accounts +is commonly referred to as the samdb interface (previously this was called the passdb +API, and is still so named in the CVS trees). In Samba 2.2.3, enabling support +for a samdb backend (e.g. <parameter>--with-ldapsam</parameter> or +<parameter>--with-tdbsam</parameter>) requires compile time support. +</para> + +<para> +When compiling Samba to include the <parameter>--with-ldapsam</parameter> autoconf +option, smbd (and associated tools) will store and lookup user accounts in +an LDAP directory. In reality, this is very easy to understand. If you are +comfortable with using an smbpasswd file, simply replace "smbpasswd" with +"LDAP directory" in all the documentation. +</para> + +<para> +There are a few points to stress about what the <parameter>--with-ldapsam</parameter> +does not provide. The LDAP support referred to in the this documentation does not +include: +</para> + +<itemizedlist> + <listitem><para>A means of retrieving user account information from + an Windows 2000 Active Directory server.</para></listitem> + <listitem><para>A means of replacing /etc/passwd.</para></listitem> +</itemizedlist> + +<para> +The second item can be accomplished by using LDAP NSS and PAM modules. LGPL +versions of these libraries can be obtained from PADL Software +(<ulink url="http://www.padl.com/">http://www.padl.com/</ulink>). However, +the details of configuring these packages are beyond the scope of this document. +</para> + +</sect2> + +<sect2> +<title>Supported LDAP Servers</title> + +<para> +The LDAP samdb code in 2.2.3 (and later) has been developed and tested +using the OpenLDAP 2.0 server and client libraries. +The same code should be able to work with Netscape's Directory Server +and client SDK. However, due to lack of testing so far, there are bound +to be compile errors and bugs. These should not be hard to fix. +If you are so inclined, please be sure to forward all patches to +<ulink url="samba-patches@samba.org">samba-patches@samba.org</ulink> and +<ulink url="jerry@samba.org">jerry@samba.org</ulink>. +</para> + +</sect2> + +<sect2> +<title>Schema and Relationship to the RFC 2307 posixAccount</title> + + +<para> +Samba 3.0 includes the necessary schema file for OpenLDAP 2.0 in +<filename>examples/LDAP/samba.schema</filename>. The sambaAccount objectclass is given here: +</para> + +<para><programlisting> +objectclass ( 1.3.1.5.1.4.1.7165.2.2.2 NAME 'sambaAccount' SUP top STRUCTURAL + DESC 'Samba Account' + MUST ( uid $ rid ) + MAY ( cn $ lmPassword $ ntPassword $ pwdLastSet $ logonTime $ + logoffTime $ kickoffTime $ pwdCanChange $ pwdMustChange $ acctFlags $ + displayName $ smbHome $ homeDrive $ scriptPath $ profilePath $ + description $ userWorkstations $ primaryGroupID $ domain )) +</programlisting></para> + +<para> +The samba.schema file has been formatted for OpenLDAP 2.0. The OID's are +owned by the Samba Team and as such is legal to be openly published. +If you translate the schema to be used with Netscape DS, please +submit the modified schema file as a patch to <ulink +url="jerry@samba.org">jerry@samba.org</ulink> +</para> + +<para> +Just as the smbpasswd file is mean to store information which supplements a +user's <filename>/etc/passwd</filename> entry, so is the sambaAccount object +meant to supplement the UNIX user account information. A sambaAccount is a +<constant>STRUCTURAL</constant> objectclass so it can be stored individually +in the directory. However, there are several fields (e.g. uid) which overlap +with the posixAccount objectclass outlined in RFC2307. This is by design. +</para> + +<!--olem: we should perhaps have a note about shadowAccounts too as many +systems use them, isn'it ? --> + +<para> +In order to store all user account information (UNIX and Samba) in the directory, +it is necessary to use the sambaAccount and posixAccount objectclasses in +combination. However, smbd will still obtain the user's UNIX account +information via the standard C library calls (e.g. getpwnam(), et. al.). +This means that the Samba server must also have the LDAP NSS library installed +and functioning correctly. This division of information makes it possible to +store all Samba account information in LDAP, but still maintain UNIX account +information in NIS while the network is transitioning to a full LDAP infrastructure. +</para> +</sect2> + +<sect2> +<title>Configuring Samba with LDAP</title> + + +<sect3> +<title>OpenLDAP configuration</title> + +<para> +To include support for the sambaAccount object in an OpenLDAP directory +server, first copy the samba.schema file to slapd's configuration directory. +</para> + +<para> +<prompt>root# </prompt><command>cp samba.schema /etc/openldap/schema/</command> +</para> + +<para> +Next, include the <filename>samba.schema</filename> file in <filename>slapd.conf</filename>. +The sambaAccount object contains two attributes which depend upon other schema +files. The 'uid' attribute is defined in <filename>cosine.schema</filename> and +the 'displayName' attribute is defined in the <filename>inetorgperson.schema</filename> +file. Both of these must be included before the <filename>samba.schema</filename> file. +</para> + +<para><programlisting> +## /etc/openldap/slapd.conf + +## schema files (core.schema is required by default) +include /etc/openldap/schema/core.schema + +## needed for sambaAccount +include /etc/openldap/schema/cosine.schema +include /etc/openldap/schema/inetorgperson.schema +include /etc/openldap/schema/samba.schema + +## uncomment this line if you want to support the RFC2307 (NIS) schema +## include /etc/openldap/schema/nis.schema + +.... +</programlisting></para> + +<para> +It is recommended that you maintain some indices on some of the most usefull attributes, +like in the following example, to speed up searches made on sambaAccount objectclasses +(and possibly posixAccount and posixGroup as well). +</para> +<para><programlisting> +# Indices to maintain +## required by OpenLDAP 2.0 +index objectclass eq + +## support pb_getsampwnam() +index uid pres,eq +## support pdb_getsambapwrid() +index rid eq + +## uncomment these if you are storing posixAccount and +## posixGroup entries in the directory as well +##index uidNumber eq +##index gidNumber eq +##index cn eq +##index memberUid eq +</programlisting></para> +</sect3> + + +<sect3> +<title>Configuring Samba</title> +<!--lem: <title>smb.conf LDAP parameters</title> --> + +<para> +The following parameters are available in smb.conf only with <parameter>--with-ldapsam</parameter> +was included with compiling Samba. +</para> + +<itemizedlist> + <listitem><para><ulink url="smb.conf.5.html#LDAPSSL">ldap ssl</ulink></para></listitem> + <listitem><para><ulink url="smb.conf.5.html#LDAPSERVER">ldap server</ulink></para></listitem> + <listitem><para><ulink url="smb.conf.5.html#LDAPADMINDN">ldap admin dn</ulink></para></listitem> + <listitem><para><ulink url="smb.conf.5.html#LDAPSUFFIX">ldap suffix</ulink></para></listitem> + <listitem><para><ulink url="smb.conf.5.html#LDAPFILTER">ldap filter</ulink></para></listitem> + <listitem><para><ulink url="smb.conf.5.html#LDAPPORT">ldap port</ulink></para></listitem> +</itemizedlist> + +<para> +These are described in the <ulink url="smb.conf.5.html">smb.conf(5)</ulink> man +page and so will not be repeated here. However, a sample smb.conf file for +use with an LDAP directory could appear as +</para> + +<para><programlisting> +## /usr/local/samba/lib/smb.conf +[global] + security = user + encrypt passwords = yes + + netbios name = TASHTEGO + workgroup = NARNIA + + # ldap related parameters + + # define the DN to use when binding to the directory servers + # The password for this DN is not stored in smb.conf. Rather it + # must be set by using 'smbpasswd -w <replaceable>secretpw</replaceable>' to store the + # passphrase in the secrets.tdb file. If the "ldap admin dn" values + # changes, this password will need to be reset. + ldap admin dn = "cn=Samba Manager,ou=people,dc=samba,dc=org" + + # specify the LDAP server's hostname (defaults to locahost) + ldap server = ahab.samba.org + + # Define the SSL option when connecting to the directory + # ('off', 'start tls', or 'on' (default)) + ldap ssl = start tls + + # define the port to use in the LDAP session (defaults to 636 when + # "ldap ssl = on") + ldap port = 389 + + # specify the base DN to use when searching the directory + ldap suffix = "ou=people,dc=samba,dc=org" + + # generally the default ldap search filter is ok + # ldap filter = "(&(uid=%u)(objectclass=sambaAccount))" +</programlisting></para> + + +</sect3> +</sect2> + + +<sect2> +<title>Accounts and Groups management</title> + +<para> +As users accounts are managed thru the sambaAccount objectclass, you should +modify you existing administration tools to deal with sambaAccount attributes. +</para> + +<para> +Machines accounts are managed with the sambaAccount objectclass, just +like users accounts. However, it's up to you to stored thoses accounts +in a different tree of you LDAP namespace: you should use +"ou=Groups,dc=plainjoe,dc=org" to store groups and +"ou=People,dc=plainjoe,dc=org" to store users. Just configure your +NSS and PAM accordingly (usually, in the /etc/ldap.conf configuration +file). +</para> + +<para> +In Samba release 3.0, the group management system is based on posix +groups. This means that Samba make usage of the posixGroup objectclass. +For now, there is no NT-like group system management (global and local +groups). +</para> + +</sect2> + +<sect2> +<title>Security and sambaAccount</title> + + +<para> +There are two important points to remember when discussing the security +of sambaAccount entries in the directory. +</para> + +<itemizedlist> + <listitem><para><emphasis>Never</emphasis> retrieve the lmPassword or + ntPassword attribute values over an unencrypted LDAP session.</para></listitem> + <listitem><para><emphasis>Never</emphasis> allow non-admin users to + view the lmPassword or ntPassword attribute values.</para></listitem> +</itemizedlist> + +<para> +These password hashes are clear text equivalents and can be used to impersonate +the user without deriving the original clear text strings. For more information +on the details of LM/NT password hashes, refer to the <ulink +url="ENCRYPTION.html">ENCRYPTION chapter</ulink> of the Samba-HOWTO-Collection. +</para> + +<para> +To remedy the first security issue, the "ldap ssl" smb.conf parameter defaults +to require an encrypted session (<command>ldap ssl = on</command>) using +the default port of 636 +when contacting the directory server. When using an OpenLDAP 2.0 server, it +is possible to use the use the StartTLS LDAP extended operation in the place of +LDAPS. In either case, you are strongly discouraged to disable this security +(<command>ldap ssl = off</command>). +</para> + +<para> +Note that the LDAPS protocol is deprecated in favor of the LDAPv3 StartTLS +extended operation. However, the OpenLDAP library still provides support for +the older method of securing communication between clients and servers. +</para> + +<para> +The second security precaution is to prevent non-administrative users from +harvesting password hashes from the directory. This can be done using the +following ACL in <filename>slapd.conf</filename>: +</para> + +<para><programlisting> +## allow the "ldap admin dn" access, but deny everyone else +access to attrs=lmPassword,ntPassword + by dn="cn=Samba Admin,ou=people,dc=plainjoe,dc=org" write + by * none +</programlisting></para> + + +</sect2> + + + +<sect2> +<title>LDAP specials attributes for sambaAccounts</title> + +<para> +The sambaAccount objectclass is composed of the following attributes: +</para> + +<itemizedlist> + + <listitem><para><constant>lmPassword</constant>: the LANMAN password 16-byte hash stored as a character + representation of a hexidecimal string.</para></listitem> + + <listitem><para><constant>ntPassword</constant>: the NT password hash 16-byte stored as a character + representation of a hexidecimal string.</para></listitem> + + <listitem><para><constant>pwdLastSet</constant>: The integer time in seconds since 1970 when the + <constant>lmPassword</constant> and <constant>ntPassword</constant> attributes were last set. + </para></listitem> + + <listitem><para><constant>acctFlags</constant>: string of 11 characters surrounded by square brackets [] + representing account flags such as U (user), W(workstation), X(no password expiration), and + D(disabled).</para></listitem> + + <listitem><para><constant>logonTime</constant>: Integer value currently unused</para></listitem> + + <listitem><para><constant>logoffTime</constant>: Integer value currently unused</para></listitem> + + <listitem><para><constant>kickoffTime</constant>: Integer value currently unused</para></listitem> + + <listitem><para><constant>pwdCanChange</constant>: Integer value currently unused</para></listitem> + + <listitem><para><constant>pwdMustChange</constant>: Integer value currently unused</para></listitem> + + <listitem><para><constant>homeDrive</constant>: specifies the drive letter to which to map the + UNC path specified by homeDirectory. The drive letter must be specified in the form "X:" + where X is the letter of the drive to map. Refer to the "logon drive" parameter in the + smb.conf(5) man page for more information.</para></listitem> + + <listitem><para><constant>scriptPath</constant>: The scriptPath property specifies the path of + the user's logon script, .CMD, .EXE, or .BAT file. The string can be null. The path + is relative to the netlogon share. Refer to the "logon script" parameter in the + smb.conf(5) man page for more information.</para></listitem> + + <listitem><para><constant>profilePath</constant>: specifies a path to the user's profile. + This value can be a null string, a local absolute path, or a UNC path. Refer to the + "logon path" parameter in the smb.conf(5) man page for more information.</para></listitem> + + <listitem><para><constant>smbHome</constant>: The homeDirectory property specifies the path of + the home directory for the user. The string can be null. If homeDrive is set and specifies + a drive letter, homeDirectory should be a UNC path. The path must be a network + UNC path of the form \\server\share\directory. This value can be a null string. + Refer to the "logon home" parameter in the smb.conf(5) man page for more information. + </para></listitem> + + <listitem><para><constant>userWorkstation</constant>: character string value currently unused. + </para></listitem> + + <listitem><para><constant>rid</constant>: the integer representation of the user's relative identifier + (RID).</para></listitem> + + <listitem><para><constant>primaryGroupID</constant>: the relative identifier (RID) of the primary group + of the user.</para></listitem> + +</itemizedlist> + +<para> +The majority of these parameters are only used when Samba is acting as a PDC of +a domain (refer to the <ulink url="Samba-PDC-HOWTO.html">Samba-PDC-HOWTO</ulink> for details on +how to configure Samba as a Primary Domain Controller). The following four attributes +are only stored with the sambaAccount entry if the values are non-default values: +</para> + +<itemizedlist> + <listitem><para>smbHome</para></listitem> + <listitem><para>scriptPath</para></listitem> + <listitem><para>logonPath</para></listitem> + <listitem><para>homeDrive</para></listitem> +</itemizedlist> + +<para> +These attributes are only stored with the sambaAccount entry if +the values are non-default values. For example, assume TASHTEGO has now been +configured as a PDC and that <command>logon home = \\%L\%u</command> was defined in +its <filename>smb.conf</filename> file. When a user named "becky" logons to the domain, +the <parameter>logon home</parameter> string is expanded to \\TASHTEGO\becky. +If the smbHome attribute exists in the entry "uid=becky,ou=people,dc=samba,dc=org", +this value is used. However, if this attribute does not exist, then the value +of the <parameter>logon home</parameter> parameter is used in its place. Samba +will only write the attribute value to the directory entry is the value is +something other than the default (e.g. \\MOBY\becky). +</para> + + +</sect2> + + + +<sect2> +<title>Example LDIF Entries for a sambaAccount</title> + + +<para> +The following is a working LDIF with the inclusion of the posixAccount objectclass: +</para> + +<para><programlisting> +dn: uid=guest2, ou=people,dc=plainjoe,dc=org +ntPassword: 878D8014606CDA29677A44EFA1353FC7 +pwdMustChange: 2147483647 +primaryGroupID: 1201 +lmPassword: 552902031BEDE9EFAAD3B435B51404EE +pwdLastSet: 1010179124 +logonTime: 0 +objectClass: sambaAccount +uid: guest2 +kickoffTime: 2147483647 +acctFlags: [UX ] +logoffTime: 2147483647 +rid: 19006 +pwdCanChange: 0 +</programlisting></para> + +<para> +The following is an LDIF entry for using both the sambaAccount and +posixAccount objectclasses: +</para> + +<para><programlisting> +dn: uid=gcarter, ou=people,dc=plainjoe,dc=org +logonTime: 0 +displayName: Gerald Carter +lmPassword: 552902031BEDE9EFAAD3B435B51404EE +primaryGroupID: 1201 +objectClass: posixAccount +objectClass: sambaAccount +acctFlags: [UX ] +userPassword: {crypt}BpM2ej8Rkzogo +uid: gcarter +uidNumber: 9000 +cn: Gerald Carter +loginShell: /bin/bash +logoffTime: 2147483647 +gidNumber: 100 +kickoffTime: 2147483647 +pwdLastSet: 1010179230 +rid: 19000 +homeDirectory: /home/tashtego/gcarter +pwdCanChange: 0 +pwdMustChange: 2147483647 +ntPassword: 878D8014606CDA29677A44EFA1353FC7 +</programlisting></para> + +</sect2> +</sect1> + +<sect1> +<title>MySQL</title> + +<sect2> +<title>Building</title> + +<para>To build the plugin, run <command>make bin/pdb_mysql.so</command> +in the <filename>source/</filename> directory of samba distribution. +</para> + +<para>Next, copy pdb_mysql.so to any location you want. I +strongly recommend installing it in $PREFIX/lib or /usr/lib/samba/</para> + +</sect2> + +<sect2> +<title>Creating the database</title> + +<para> +You either can set up your own table and specify the field names to pdb_mysql (see below +for the column names) or use the default table. The file <filename>examples/pdb/mysql/mysql.dump</filename> +contains the correct queries to create the required tables. Use the command : + +<command>mysql -u<replaceable>username</replaceable> -h<replaceable>hostname</replaceable> -p<replaceable>password</replaceable> <replaceable>databasename</replaceable> < <filename>/path/to/samba/examples/pdb/mysql/mysql.dump</filename></command> + +</para> +</sect2> + +<sect2> +<title>Configuring</title> + +<para>This plugin lacks some good documentation, but here is some short info:</para> + +<para>Add a the following to the <command>passdb backend</command> variable in your <filename>smb.conf</filename>: +<programlisting> +passdb backend = [other-plugins] plugin:/location/to/pdb_mysql.so:identifier [other-plugins] +</programlisting> +</para> + +<para>The identifier can be any string you like, as long as it doesn't collide with +the identifiers of other plugins or other instances of pdb_mysql. If you +specify multiple pdb_mysql.so entries in 'passdb backend', you also need to +use different identifiers! +</para> + +<para> +Additional options can be given thru the smb.conf file in the [global] section. +</para> + +<para><programlisting> +identifier:mysql host - host name, defaults to 'localhost' +identifier:mysql password +identifier:mysql user - defaults to 'samba' +identifier:mysql database - defaults to 'samba' +identifier:mysql port - defaults to 3306 +identifier:table - Name of the table containing users +</programlisting></para> + +<warning> +<para> +Since the password for the mysql user is stored in the +smb.conf file, you should make the the smb.conf file +readable only to the user that runs samba. This is considered a security +bug and will be fixed soon. +</para> +</warning> + +<para>Names of the columns in this table(I've added column types those columns should have first):</para> + +<para><programlisting> +identifier:logon time column - int(9) +identifier:logoff time column - int(9) +identifier:kickoff time column - int(9) +identifier:pass last set time column - int(9) +identifier:pass can change time column - int(9) +identifier:pass must change time column - int(9) +identifier:username column - varchar(255) - unix username +identifier:domain column - varchar(255) - NT domain user is part of +identifier:nt username column - varchar(255) - NT username +identifier:fullname column - varchar(255) - Full name of user +identifier:home dir column - varchar(255) - Unix homedir path +identifier:dir drive column - varchar(2) - Directory drive path (eg: 'H:') +identifier:logon script column - varchar(255) - Batch file to run on client side when logging on +identifier:profile path column - varchar(255) - Path of profile +identifier:acct desc column - varchar(255) - Some ASCII NT user data +identifier:workstations column - varchar(255) - Workstations user can logon to (or NULL for all) +identifier:unknown string column - varchar(255) - unknown string +identifier:munged dial column - varchar(255) - ? +identifier:uid column - int(9) - Unix user ID (uid) +identifier:gid column - int(9) - Unix user group (gid) +identifier:user sid column - varchar(255) - NT user SID +identifier:group sid column - varchar(255) - NT group ID +identifier:lanman pass column - varchar(255) - encrypted lanman password +identifier:nt pass column - varchar(255) - encrypted nt passwd +identifier:plain pass column - varchar(255) - plaintext password +identifier:acct control column - int(9) - nt user data +identifier:unknown 3 column - int(9) - unknown +identifier:logon divs column - int(9) - ? +identifier:hours len column - int(9) - ? +identifier:unknown 5 column - int(9) - unknown +identifier:unknown 6 column - int(9) - unknown +</programlisting></para> + +<para> +Eventually, you can put a colon (:) after the name of each column, which +should specify the column to update when updating the table. You can also +specify nothing behind the colon - then the data from the field will not be +updated. +</para> + +</sect2> + +<sect2> +<title>Using plaintext passwords or encrypted password</title> + +<para> +I strongly discourage the use of plaintext passwords, however, you can use them: +</para> + +<para> +If you would like to use plaintext passwords, set 'identifier:lanman pass column' and 'identifier:nt pass column' to 'NULL' (without the quotes) and 'identifier:plain pass column' to the name of the column containing the plaintext passwords. +</para> + +<para> +If you use encrypted passwords, set the 'identifier:plain pass column' to 'NULL' (without the quotes). This is the default. +</para> + +</sect2> + +<sect2> +<title>Getting non-column data from the table</title> + +<para> +It is possible to have not all data in the database and making some 'constant'. +</para> + +<para> +For example, you can set 'identifier:fullname column' to : +<command>CONCAT(First_name,' ',Sur_name)</command> +</para> + +<para> +Or, set 'identifier:workstations column' to : +<command>NULL</command></para> + +<para>See the MySQL documentation for more language constructs.</para> + +</sect2> +</sect1> + +<sect1> +<title>Passdb XML plugin</title> + +<sect2> +<title>Building</title> + +<para>This module requires libxml2 to be installed.</para> + +<para>To build pdb_xml, run: <command>make bin/pdb_xml.so</command> in +the directory <filename>source/</filename>. </para> + +</sect2> + +<sect2> +<title>Usage</title> + +<para>The usage of pdb_xml is pretty straightforward. To export data, use: + +<command>pdbedit -e plugin:/usr/lib/samba/pdb_xml.so:filename</command> + +(where filename is the name of the file to put the data in) +</para> + +<para> +To import data, use: +<command>pdbedit -i plugin:/usr/lib/samba/pdb_xml.so:filename -e current-pdb</command> + +Where filename is the name to read the data from and current-pdb to put it in. +</para> +</sect2> +</sect1> + +</chapter> |