diff options
Diffstat (limited to 'docs/htmldocs/smbpasswd.5.html')
| -rw-r--r-- | docs/htmldocs/smbpasswd.5.html | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/docs/htmldocs/smbpasswd.5.html b/docs/htmldocs/smbpasswd.5.html new file mode 100644 index 0000000000..b65ad2dadf --- /dev/null +++ b/docs/htmldocs/smbpasswd.5.html @@ -0,0 +1,90 @@ +<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>smbpasswd</title><link rel="stylesheet" href="samba.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.60.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en"><a name="smbpasswd.5"></a><div class="titlepage"><div></div><div></div></div><div class="refnamediv"><h2>Name</h2><p>smbpasswd — The Samba encrypted password file</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><p><tt class="filename">smbpasswd</tt></p></div><div class="refsect1" lang="en"><h2>DESCRIPTION</h2><p>This tool is part of the <a href="Samba.7.html"><span class="citerefentry"><span class="refentrytitle">Samba</span>(7)</span></a> suite.</p><p>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. </p></div><div class="refsect1" lang="en"><h2>FILE FORMAT</h2><p>The format of the smbpasswd file used by Samba 2.2 + is very similar to the familiar Unix <tt class="filename">passwd(5)</tt> + 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: </p><div class="variablelist"><dl><dt><span class="term">name</span></dt><dd><p> This is the user name. It must be a name that + already exists in the standard UNIX passwd file. </p></dd><dt><span class="term">uid</span></dt><dd><p>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. + </p></dd><dt><span class="term">Lanman Password Hash</span></dt><dd><p>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 + <tt class="constant">disabled</tt> and the user will not be able to + log onto the Samba server. </p><p><span class="emphasis"><em>WARNING !!</em></span> 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 <span class="emphasis"><em>plain text + equivalents</em></span> and must <span class="emphasis"><em>NOT</em></span> 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. </p></dd><dt><span class="term">NT Password Hash</span></dt><dd><p>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. </p><p>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). </p><p><span class="emphasis"><em>WARNING !!</em></span>. 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 <span class="emphasis"><em>plain text + equivalents</em></span> and must <span class="emphasis"><em>NOT</em></span> 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. </p></dd><dt><span class="term">Account Flags</span></dt><dd><p>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 following characters: + </p><div class="itemizedlist"><ul type="disc"><li><p><span class="emphasis"><em>U</em></span> - 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. </p></li><li><p><span class="emphasis"><em>N</em></span> - 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 <i class="parameter"><tt> + null passwords</tt></i> parameter is set in the + <a href="smb.conf.5.html"><span class="citerefentry"><span class="refentrytitle">smb.conf</span>(5)</span></a> config file. </p></li><li><p><span class="emphasis"><em>D</em></span> - This means the account + is disabled and no SMB/CIFS logins will be allowed for this user. </p></li><li><p><span class="emphasis"><em>W</em></span> - 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. </p></li></ul></div><p>Other flags may be added as the code is extended in future. + The rest of this field space is filled in with spaces. </p></dd><dt><span class="term">Last Change Time</span></dt><dd><p>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. + </p></dd></dl></div><p>All other colon separated fields are ignored at this time.</p></div><div class="refsect1" lang="en"><h2>VERSION</h2><p>This man page is correct for version 3.0 of + the Samba suite.</p></div><div class="refsect1" lang="en"><h2>SEE ALSO</h2><p><a href="smbpasswd.8.html"><span class="citerefentry"><span class="refentrytitle">smbpasswd</span>(8)</span></a>, <a href="Samba.7.html"><span class="citerefentry"><span class="refentrytitle">Samba</span>(7)</span></a>, and + the Internet RFC1321 for details on the MD4 algorithm. + </p></div><div class="refsect1" lang="en"><h2>AUTHOR</h2><p>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.</p><p>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. The conversion to DocBook XML 4.2 + for Samba 3.0 was done by Alexander Bokovoy.</p></div></div></body></html> |