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-
- <manualpage metafile="htpasswd.xml.meta">
- <parentdocument href="./">Programs</parentdocument>
-
- <title>htpasswd - Manage user files for basic authentication</title>
-
- <summary>
- <p><code>htpasswd</code> is used to create and update the flat-files used to
- store usernames and password for basic authentication of HTTP users. If
- <code>htpasswd</code> cannot access a file, such as not being able to write
- to the output file or not being able to read the file in order to update it,
- it returns an error status and makes no changes.</p>
-
- <p>Resources available from the Apache HTTP server can be restricted to
- just the users listed in the files created by <code>htpasswd</code>. This
- program can only manage usernames and passwords stored in a flat-file. It
- can encrypt and display password information for use in other types of data
- stores, though. To use a DBM database see <a
- href="dbmmanage.html">dbmmanage</a>.</p>
-
- <p><code>htpasswd</code> encrypts passwords using either a version of MD5
- modified for Apache, or the system's <code>crypt()</code> routine. Files
- managed by <code>htpasswd</code> may contain both types of passwords; some
- user records may have MD5-encrypted passwords while others in the same file
- may have passwords encrypted with <code>crypt()</code>.</p>
-
- <p>This manual page only lists the command line arguments. For details of
- the directives necessary to configure user authentication in
- <a href="httpd.html">httpd</a> see the Apache manual, which is part of the
- Apache distribution or can be found at <a href="http://httpd.apache.org"
- >http://httpd.apache.org/</a>.</p>
- </summary>
- <seealso><a href="httpd.html">httpd</a></seealso>
- <seealso>The scripts in support/SHA1 which come with the
- distribution.</seealso>
-
- <section id="synopsis"><title>Synopsis</title>
- <p><code><strong>htpasswd</strong>
- [ -<strong>c</strong> ]
- [ -<strong>m</strong> ]
- [ -<strong>D</strong> ] <var>passwdfile</var> <var>username</var></code></p>
-
- <p><code><strong>htpasswd</strong> -<strong>b</strong>
- [ -<strong>c</strong> ]
- [ -<strong>m</strong> |
- -<strong>d</strong> |
- -<strong>p</strong> |
- -<strong>s</strong> ]
- [ -<strong>D</strong> ] <var>passwdfile</var> <var>username</var>
- <var>password</var></code></p>
-
- <p><code><strong>htpasswd</strong> -<strong>n</strong>
- [ -<strong>m</strong> |
- -<strong>d</strong> |
- -<strong>s</strong> |
- -<strong>p</strong> ] <var>username</var></code></p>
-
- <p><code><strong>htpasswd</strong> -<strong>nb</strong>
- [ -<strong>m</strong> |
- -<strong>d</strong> |
- -<strong>s</strong> |
- -<strong>p</strong> ] <var>username</var> <var>password</var></code></p>
- </section>
-
- <section id="options"><title>Options</title>
- <dl>
- <dt><code>-b</code></dt>
- <dd>Use batch mode; <em>i.e.</em>, get the password from the command line
- rather than prompting for it. This option should be used with extreme care,
- since <strong>the password is clearly visible</strong> on the command
- line.</dd>
-
- <dt><code>-c</code></dt>
- <dd>Create the <var>passwdfile</var>. If <var>passwdfile</var> already
- exists, it is rewritten and truncated. This option cannot be combined with
- the <code>-n</code> option.</dd>
-
- <dt><code>-n</code></dt>
- <dd>Display the results on standard output rather than updating a file.
- This is useful for generating password records acceptable to Apache for
- inclusion in non-text data stores. This option changes the syntax of the
- command line, since the <var>passwdfile</var> argument (usually the first
- one) is omitted. It cannot be combined with the <code>-c</code> option.</dd>
-
- <dt><code>-m</code></dt>
- <dd>Use MD5 encryption for passwords. On Windows, Netware and TPF, this is
- the default.</dd>
-
- <dt><code>-d</code></dt>
- <dd>Use <code>crypt()</code> encryption for passwords. The default on all
- platforms but Windows, Netware and TPF. Though possibly supported by
- <code>htpasswd</code> on all platforms, it is not supported by the
- <a href="httpd.html">httpd</a> server on Windows, Netware and TPF.</dd>
-
- <dt><code>-s</code></dt>
- <dd>Use SHA encryption for passwords. Facilitates migration from/to Netscape
- servers using the LDAP Directory Interchange Format (ldif).</dd>
-
- <dt><code>-p</code></dt>
- <dd>Use plaintext passwords. Though <code>htpasswd</code> will support
- creation on all platforms, the <a href="httpd.html">httpd</a> daemon will
- only accept plain text passwords on Windows, Netware and TPF.</dd>
-
- <dt><code>-D</code></dt>
- <dd>Delete user. If the username exists in the specified htpasswd file, it
- will be deleted.</dd>
-
- <dt><code><var>passwdfile</var></code></dt>
- <dd>Name of the file to contain the user name and password. If
- <code>-c</code> is given, this file is created if it does not already exist,
- or rewritten and truncated if it does exist.</dd>
-
- <dt><code><var>username</var></code></dt>
- <dd>The username to create or update in <var>passwdfile</var>. If
- <var>username</var> does not exist in this file, an entry is added. If it
- does exist, the password is changed.</dd>
-
- <dt><code><var>password</var></code></dt>
- <dd>The plaintext password to be encrypted and stored in the file. Only
- used with the <code>-b</code> flag.</dd>
- </dl>
- </section>
-
- <section id="exit"><title>Exit Status</title>
- <p><code>htpasswd</code> returns a zero status ("true") if the username and
- password have been successfully added or updated in the
- <var>passwdfile</var>. <code>htpasswd</code> returns <code>1</code> if it
- encounters some problem accessing files, <code>2</code> if there was a
- syntax problem with the command line, <code>3</code> if the password was
- entered interactively and the verification entry didn't match,
- <code>4</code> if its operation was interrupted, <code>5</code> if a value
- is too long (username, filename, password, or final computed record),
- <code>6</code> if the username contains illegal characters (see the
- <a href="#restrictions">Restrictions section</a>), and <code>7</code>
- if the file is not a valid password file.</p>
- </section>
-
- <section id="examples"><title>Examples</title>
- <example>
- htpasswd /usr/local/etc/apache/.htpasswd-users jsmith
- </example>
-
- <p>Adds or modifies the password for user <code>jsmith</code>. The user
- is prompted for the password. If executed on a Windows system, the password
- will be encrypted using the modified Apache MD5 algorithm; otherwise, the
- system's <code>crypt()</code> routine will be used. If the file does not
- exist, <code>htpasswd</code> will do nothing except return an error.</p>
-
- <example>
- htpasswd -c /home/doe/public_html/.htpasswd jane
- </example>
-
- <p>Creates a new file and stores a record in it for user <code>jane</code>.
- The user is prompted for the password. If the file exists and cannot be
- read, or cannot be written, it is not altered and <code>htpasswd</code>
- will display a message and return an error status.</p>
-
- <example>
- htpasswd -mb /usr/web/.htpasswd-all jones Pwd4Steve
- </example>
-
- <p>Encrypts the password from the command line (<code>Pwd4Steve</code>)
- using the MD5 algorithm, and stores it in the specified file.</p>
- </section>
-
- <section id="security"><title>Security Considerations</title>
- <p>Web password files such as those managed by <code>htpasswd</code> should
- <em>not</em> be within the Web server's URI space -- that is, they should
- not be fetchable with a browser.</p>
-
- <p>The use of the <code>-b</code> option is discouraged, since when it is
- used the unencrypted password appears on the command line.</p>
- </section>
-
- <section id="restrictions"><title>Restrictions</title>
- <p>On the Windows and MPE platforms, passwords encrypted with
- <code>htpasswd</code> are limited to no more than <code>255</code>
- characters in length. Longer passwords will be truncated to 255
- characters.</p>
-
- <p>The MD5 algorithm used by <code>htpasswd</code> is specific to the Apache
- software; passwords encrypted using it will not be usable with other Web
- servers.</p>
-
- <p>Usernames are limited to <code>255</code> bytes and may not include the
- character <code>:</code>.</p>
- </section>
-
- </manualpage>
-