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diff --git a/docs/docbook/manpages/smbpasswd.5.sgml b/docs/docbook/manpages/smbpasswd.5.sgml new file mode 100644 index 0000000000..5c80ac4c06 --- /dev/null +++ b/docs/docbook/manpages/smbpasswd.5.sgml @@ -0,0 +1,204 @@ +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.1//EN"> +<refentry id="smbpasswd"> + +<refmeta> + <refentrytitle>smbpasswd</refentrytitle> + <manvolnum>5</manvolnum> +</refmeta> + + +<refnamediv> + <refname>smbpasswd</refname> + <refpurpose>The Samba encrypted password file</refpurpose> +</refnamediv> + +<refsynopsisdiv> + <para><filename>smbpasswd</filename></para> +</refsynopsisdiv> + +<refsect1> + <title>DESCRIPTION</title> + + <para>This tool is part of the <ulink url="samba.7.html"> + Samba</ulink> suite.</para> + + <para>smbpasswd is the Samba encrypted password file. It contains + the username, Unix user id and the SMB hashed passwords of the + user, as well as account flag information and the time the + password was last changed. This file format has been evolving with + Samba and has had several different formats in the past. </para> +</refsect1> + +<refsect1> + <title>FILE FORMAT</title> + + <para>The format of the smbpasswd file used by Samba 2.2 + is very similar to the familiar Unix <filename>passwd(5)</filename> + file. It is an ASCII file containing one line for each user. Each field + ithin each line is separated from the next by a colon. Any entry + beginning with '#' is ignored. The smbpasswd file contains the + following information for each user: </para> + + <variablelist> + <varlistentry> + <term>name</term> + <listitem><para> This is the user name. It must be a name that + already exists in the standard UNIX passwd file. </para> + </listitem> + </varlistentry> + + <varlistentry> + <term>uid</term> + <listitem><para>This is the UNIX uid. It must match the uid + field for the same user entry in the standard UNIX passwd file. + If this does not match then Samba will refuse to recognize + this smbpasswd file entry as being valid for a user. + </para></listitem> + </varlistentry> + + + <varlistentry> + <term>Lanman Password Hash</term> + <listitem><para>This is the LANMAN hash of the user's password, + encoded as 32 hex digits. The LANMAN hash is created by DES + encrypting a well known string with the user's password as the + DES key. This is the same password used by Windows 95/98 machines. + Note that this password hash is regarded as weak as it is + vulnerable to dictionary attacks and if two users choose the + same password this entry will be identical (i.e. the password + is not "salted" as the UNIX password is). If the user has a + null password this field will contain the characters "NO PASSWORD" + as the start of the hex string. If the hex string is equal to + 32 'X' characters then the user's account is marked as + <constant>disabled</constant> and the user will not be able to + log onto the Samba server. </para> + + <para><emphasis>WARNING !!</emphasis> Note that, due to + the challenge-response nature of the SMB/CIFS authentication + protocol, anyone with a knowledge of this password hash will + be able to impersonate the user on the network. For this + reason these hashes are known as <emphasis>plain text + equivalents</emphasis> and must <emphasis>NOT</emphasis> be made + available to anyone but the root user. To protect these passwords + the smbpasswd file is placed in a directory with read and + traverse access only to the root user and the smbpasswd file + itself must be set to be read/write only by root, with no + other access. </para></listitem> + </varlistentry> + + + <varlistentry> + <term>NT Password Hash</term> + <listitem><para>This is the Windows NT hash of the user's + password, encoded as 32 hex digits. The Windows NT hash is + created by taking the user's password as represented in + 16-bit, little-endian UNICODE and then applying the MD4 + (internet rfc1321) hashing algorithm to it. </para> + + <para>This password hash is considered more secure than + the LANMAN Password Hash as it preserves the case of the + password and uses a much higher quality hashing algorithm. + However, it is still the case that if two users choose the same + password this entry will be identical (i.e. the password is + not "salted" as the UNIX password is). </para> + + <para><emphasis>WARNING !!</emphasis>. Note that, due to + the challenge-response nature of the SMB/CIFS authentication + protocol, anyone with a knowledge of this password hash will + be able to impersonate the user on the network. For this + reason these hashes are known as <emphasis>plain text + equivalents</emphasis> and must <emphasis>NOT</emphasis> be made + available to anyone but the root user. To protect these passwords + the smbpasswd file is placed in a directory with read and + traverse access only to the root user and the smbpasswd file + itself must be set to be read/write only by root, with no + other access. </para></listitem> + </varlistentry> + + + <varlistentry> + <term>Account Flags</term> + <listitem><para>This section contains flags that describe + the attributes of the users account. In the Samba 2.2 release + this field is bracketed by '[' and ']' characters and is always + 13 characters in length (including the '[' and ']' characters). + The contents of this field may be any of the characters. + </para> + + <itemizedlist> + <listitem><para><emphasis>U</emphasis> - This means + this is a "User" account, i.e. an ordinary user. Only User + and Workstation Trust accounts are currently supported + in the smbpasswd file. </para></listitem> + + <listitem><para><emphasis>N</emphasis> - This means the + account has no password (the passwords in the fields LANMAN + Password Hash and NT Password Hash are ignored). Note that this + will only allow users to log on with no password if the <parameter> + null passwords</parameter> parameter is set in the <ulink + url="smb.conf.5.html#NULLPASSWORDS"><filename>smb.conf(5) + </filename></ulink> config file. </para></listitem> + + <listitem><para><emphasis>D</emphasis> - This means the account + is disabled and no SMB/CIFS logins will be allowed for + this user. </para></listitem> + + <listitem><para><emphasis>W</emphasis> - This means this account + is a "Workstation Trust" account. This kind of account is used + in the Samba PDC code stream to allow Windows NT Workstations + and Servers to join a Domain hosted by a Samba PDC. </para> + </listitem> + </itemizedlist> + + <para>Other flags may be added as the code is extended in future. + The rest of this field space is filled in with spaces. </para> + </listitem> + </varlistentry> + + + <varlistentry> + <term>Last Change Time</term> + <listitem><para>This field consists of the time the account was + last modified. It consists of the characters 'LCT-' (standing for + "Last Change Time") followed by a numeric encoding of the UNIX time + in seconds since the epoch (1970) that the last change was made. + </para></listitem> + </varlistentry> + </variablelist> + + <para>All other colon separated fields are ignored at this time.</para> +</refsect1> + +<refsect1> + <title>VERSION</title> + + <para>This man page is correct for version 3.0 of + the Samba suite.</para> +</refsect1> + +<refsect1> + <title>SEE ALSO</title> + <para><ulink url="smbpasswd.8.html"><command>smbpasswd(8)</command></ulink>, + <ulink url="samba.7.html">samba(7)</ulink>, and + the Internet RFC1321 for details on the MD4 algorithm. + </para> +</refsect1> + +<refsect1> + <title>AUTHOR</title> + + <para>The original Samba software and related utilities + were created by Andrew Tridgell. Samba is now developed + by the Samba Team as an Open Source project similar + to the way the Linux kernel is developed.</para> + + <para>The original Samba man pages were written by Karl Auer. + The man page sources were converted to YODL format (another + excellent piece of Open Source software, available at + <ulink url="ftp://ftp.icce.rug.nl/pub/unix/"> + ftp://ftp.icce.rug.nl/pub/unix/</ulink>) and updated for the Samba 2.0 + release by Jeremy Allison. The conversion to DocBook for + Samba 2.2 was done by Gerald Carter</para> +</refsect1> + +</refentry> |