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htpasswd2




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  dis­
       play  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  system's crypt() routine.
       Files managed by htpasswd may contain both types of  pass­
       words;  some user records may have MD5-encrypted passwords
       while others in the same file may have passwords encrypted
       with crypt().

       This  manual  page  only lists the command line arguments.
       For details of the directives necessary 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
                     the command line, since the passwdfile argu­
                     ment (usually the first one) is omitted.  It
                     cannot be combined with the -c option.

              -m     Use  MD5  encryption  for passwords. On Win­
                     dows, Netware and TPF, this is the  default.

              -d     Use  crypt()  encryption  for passwords. The
                     default on all platforms but  Windows,  Net­
                     ware  and  TPF. Though possibly supported by
                     htpasswd on all platforms, it  is  not  sup­
                     ported  by the httpd server on Windows, Net­
                     ware and TPF.

              -s     Use SHA encryption  for  passwords.  Facili­
                     tates  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 passwd­
                     file. 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 successfully 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
       tem, the password will be  encrypted  using  the  modified
       Apache MD5 algorithm; otherwise, the system's crypt() rou­
       tine 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.

       The  use of the -b option is discouraged, since when it is
       used the unencrypted password appears on the command line.


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 charac­
       ters.

       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 :.

  

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