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Under GNU General Public License
2012-05-26 00:05 @38.107.179.236 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
HTPASSWD(1) htpasswd HTPASSWD(1)
NAME
htpasswd - Manage user files for basic authentication
SYNOPSIS
htpasswd [ -c ] [ -m ] [ -D ] passwdfile username
htpasswd -b [ -c ] [ -m | -d | -p | -s ] [ -D ] passwdfile username password
htpasswd -n [ -m | -d | -s | -p ] username
htpasswd -nb [ -m | -d | -s | -p ] username password
SUMMARY
htpasswd is used to create and update the flat-files used to store usernames and password
for basic authentication of HTTP users. If htpasswd 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.
Resources available from the Apache HTTP server can be restricted to just the users listed
in the files created by htpasswd. 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 dbmmanage.
htpasswd encrypts passwords using either a version of MD5 modified for Apache, or the sys-
tem's crypt() routine. Files managed by htpasswd may contain both types of passwords; some
user records may have MD5-encrypted passwords while others in the same file may have pass-
words encrypted with crypt().
This manual page only lists the command line arguments. For details of the directives nec-
essary to configure user authentication in httpd see the Apache manual, which is part of
the Apache distribution or can be found at http://httpd.apache.org/.
OPTIONS
-b Use batch mode; i.e., get the password from the command line rather than prompting
for it. This option should be used with extreme care, since the password is clearly
visible on the command line.
-c Create the passwdfile. If passwdfile already exists, it is rewritten and truncated.
This option cannot be combined with the -n option.
-n 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 passwdfile
argument (usually the first one) is omitted. It cannot be combined with the -c
option.
-m Use MD5 encryption for passwords. On Windows, Netware and TPF, this is the default.
-d Use crypt() encryption for passwords. The default on all platforms but Windows,
Netware and TPF. Though possibly supported by htpasswd on all platforms, it is not
supported by the httpd server on Windows, Netware and TPF.
-s Use SHA encryption for passwords. Facilitates migration from/to Netscape servers
using the LDAP Directory Interchange Format (ldif).
-p Use plaintext passwords. Though htpasswd will support creation on all platforms,
the httpd daemon will only accept plain text passwords on Windows, Netware and TPF.
-D Delete user. If the username exists in the specified htpasswd file, it will be
deleted.
passwdfile
Name of the file to contain the user name and password. If -c is given, this file
is created if it does not already exist, or rewritten and truncated if it does
exist.
username
The username to create or update in passwdfile. If username does not exist in this
file, an entry is added. If it does exist, the password is changed.
password
The plaintext password to be encrypted and stored in the file. Only used with the
-b flag.
EXIT STATUS
htpasswd returns a zero status ("true") if the username and password have been success-
fully added or updated in the passwdfile. htpasswd returns 1 if it encounters some problem
accessing files, 2 if there was a syntax problem with the command line, 3 if the password
was entered interactively and the verification entry didn't match, 4 if its operation was
interrupted, 5 if a value is too long (username, filename, password, or final computed
record), 6 if the username contains illegal characters (see the Restrictions section), and
7 if the file is not a valid password file.
EXAMPLES
htpasswd /usr/local/etc/apache/.htpasswd-users jsmith
Adds or modifies the password for user jsmith. 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 crypt() routine will be used. If the file does not
exist, htpasswd will do nothing except return an error.
htpasswd -c /home/doe/public_html/.htpasswd jane
Creates a new file and stores a record in it for user jane. The user is prompted for the
password. If the file exists and cannot be read, or cannot be written, it is not altered
and htpasswd will display a message and return an error status.
htpasswd -mb /usr/web/.htpasswd-all jones Pwd4Steve
Encrypts the password from the command line (Pwd4Steve) using the MD5 algorithm, and
stores it in the specified file.
SECURITY CONSIDERATIONS
Web password files such as those managed by htpasswd should not be within the Web server's
URI space -- that is, they should not be fetchable with a browser.
This program is not safe as a setuid executable. Do not make it setuid.
The use of the -b option is discouraged, since when it is used the unencrypted password
appears on the command line.
When using the crypt() algorithm, note that only the first 8 characters of the password
are used to form the password. If the supplied password is longer, the extra characters
will be silently discarded.
The SHA encryption format does not use salting: for a given password, there is only one
encrypted representation. The crypt() and MD5 formats permute the representation by
prepending a random salt string, to make dictionary attacks against the passwords more
difficult.
RESTRICTIONS
On the Windows and MPE platforms, passwords encrypted with htpasswd are limited to no more
than 255 characters in length. Longer passwords will be truncated to 255 characters.
The MD5 algorithm used by htpasswd is specific to the Apache software; passwords encrypted
using it will not be usable with other Web servers.
Usernames are limited to 255 bytes and may not include the character :.
Apache HTTP Server 2007-04-24 HTPASSWD(1)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-26 00:05 @38.107.179.236 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)