#!/usr/bin/perl #------------------------------------------------------------------------------ # Copyright and Licence #------------------------------------------------------------------------------ # CGI-Telnet Version 1.0 for NT and Unix : Run Commands on your Web Server # # Copyright (C) 2001 Rohitab Batra # Permission is granted to use, distribute and modify this script so long # as this copyright notice is left intact. If you make changes to the script # please document them and inform me. If you would like any changes to be made # in this script, you can e-mail me. # # Author: Rohitab Batra # Author e-mail: rohitab@rohitab.com # Author Homepage: http://www.rohitab.com/ # Script Homepage: http://www.rohitab.com/cgiscripts/cgitelnet.html # Product Support: http://www.rohitab.com/support/ # Discussion Forum: http://www.rohitab.com/discuss/ # Mailing List: http://www.rohitab.com/mlist/ #------------------------------------------------------------------------------ #------------------------------------------------------------------------------ # Installation #------------------------------------------------------------------------------ # To install this script # # 1. Modify the first line "#!/usr/bin/perl" to point to the correct path on # your server. For most servers, you may not need to modify this. # 2. Change the password in the Configuration section below. # 3. If you're running the script under Windows NT, set $WinNT = 1 in the # Configuration Section below. # 4. Upload the script to a directory on your server which has permissions to # execute CGI scripts. This is usually cgi-bin. Make sure that you upload # the script in ASCII mode. # 5. Change the permission (CHMOD) of the script to 755. # 6. Open the script in your web browser. If you uploaded the script in # cgi-bin, this should be http://www.yourserver.com/cgi-bin/cgitelnet.pl # 7. Login using the password that you specified in Step 2. #------------------------------------------------------------------------------ #------------------------------------------------------------------------------ # Configuration: You need to change only $Password and $WinNT. The other # values should work fine for most systems. #------------------------------------------------------------------------------ $Password = "123456"; # Change this. You will need to enter this # to login. $WinNT = 0; # You need to change the value of this to 1 if # you're running this script on a Windows NT # machine. If you're running it on Unix, you # can leave the value as it is. $NTCmdSep = "&"; # This character is used to seperate 2 commands # in a command line on Windows NT. $UnixCmdSep = ";"; # This character is used to seperate 2 commands # in a command line on Unix. $CommandTimeoutDuration = 10; # Time in seconds after commands will be killed # Don't set this to a very large value. This is # useful for commands that may hang or that # take very long to execute, like "find /". # This is valid only on Unix servers. It is # ignored on NT Servers. $ShowDynamicOutput = 1; # If this is 1, then data is sent to the # browser as soon as it is output, otherwise # it is buffered and send when the command # completes. This is useful for commands like # ping, so that you can see the output as it # is being generated. # DON'T CHANGE ANYTHING BELOW THIS LINE UNLESS YOU KNOW WHAT YOU'RE DOING !! $CmdSep = ($WinNT ? $NTCmdSep : $UnixCmdSep); $CmdPwd = ($WinNT ? "cd" : "pwd"); $PathSep = ($WinNT ? "\\" : "/"); $Redirector = ($WinNT ? " 2>&1 1>&2" : " 1>&1 2>&1"); #------------------------------------------------------------------------------ # Reads the input sent by the browser and parses the input variables. It # parses GET, POST and multipart/form-data that is used for uploading files. # The filename is stored in $in{'f'} and the data is stored in $in{'filedata'}. # Other variables can be accessed using $in{'var'}, where var is the name of # the variable. Note: Most of the code in this function is taken from other CGI # scripts. #------------------------------------------------------------------------------ sub ReadParse { local (*in) = @_ if @_; local ($i, $loc, $key, $val); $MultipartFormData = $ENV{'CONTENT_TYPE'} =~ /multipart\/form-data; boundary=(.+)$/; if($ENV{'REQUEST_METHOD'} eq "GET") { $in = $ENV{'QUERY_STRING'}; } elsif($ENV{'REQUEST_METHOD'} eq "POST") { binmode(STDIN) if $MultipartFormData & $WinNT; read(STDIN, $in, $ENV{'CONTENT_LENGTH'}); } # handle file upload data if($ENV{'CONTENT_TYPE'} =~ /multipart\/form-data; boundary=(.+)$/) { $Boundary = '--'.$1; # please refer to RFC1867 @list = split(/$Boundary/, $in); $HeaderBody = $list[1]; $HeaderBody =~ /\r\n\r\n|\n\n/; $Header = $`; $Body = $'; $Body =~ s/\r\n$//; # the last \r\n was put in by Netscape $in{'filedata'} = $Body; $Header =~ /filename=\"(.+)\"/; $in{'f'} = $1; $in{'f'} =~ s/\"//g; $in{'f'} =~ s/\s//g; # parse trailer for($i=2; $list[$i]; $i++) { $list[$i] =~ s/^.+name=$//; $list[$i] =~ /\"(\w+)\"/; $key = $1; $val = $'; $val =~ s/(^(\r\n\r\n|\n\n))|(\r\n$|\n$)//g; $val =~ s/%(..)/pack("c", hex($1))/ge; $in{$key} = $val; } } else # standard post data (url encoded, not multipart) { @in = split(/&/, $in); foreach $i (0 .. $#in) { $in[$i] =~ s/\+/ /g; ($key, $val) = split(/=/, $in[$i], 2); $key =~ s/%(..)/pack("c", hex($1))/ge; $val =~ s/%(..)/pack("c", hex($1))/ge; $in{$key} .= "\0" if (defined($in{$key})); $in{$key} .= $val; } } } #------------------------------------------------------------------------------ # Prints the HTML Page Header # Argument 1: Form item name to which focus should be set #------------------------------------------------------------------------------ sub PrintPageHeader { $EncodedCurrentDir = $CurrentDir; $EncodedCurrentDir =~ s/([^a-zA-Z0-9])/'%'.unpack("H*",$1)/eg; print "Content-type: text/html\n\n"; print < CGI-Telnet Version 1.0 $HtmlMetaHeader
# CGI-Telnet Version 1.0 - Connected to $ServerName
Upload File | Download File | Disconnect | Help
END } #------------------------------------------------------------------------------ # Prints the Login Screen #------------------------------------------------------------------------------ sub PrintLoginScreen { $Message = q$
 _____  _____  _____          _____        _               _
/  __ \|  __ \|_   _|        |_   _|      | |             | |
| /  \/| |  \/  | |   ______   | |    ___ | | _ __    ___ | |_
| |    | | __   | |  |______|  | |   / _ \| || '_ \  / _ \| __|
| \__/\| |_\ \ _| |_           | |  |  __/| || | | ||  __/| |_
 \____/ \____/ \___/           \_/   \___||_||_| |_| \___| \__| 1.0
                                         
                      ______             © 2001, Rohitab Batra
                   .-"      "-.
                  /            \
                 |              |
                 |,  .-.  .-.  ,|
                 | )(_o/  \o_)( |
                 |/     /\     \|
       (@_       (_     ^^     _)
  _     ) \_______\__|IIIIII|__/_______________________
 (_)@8@8{}<________|-\IIIIII/-|________________________>
        )_/        \          / 
       (@           `--------`
             W A R N I N G: Private Server
$; #' print < Trying $ServerName...
Connected to $ServerName
Escape character is ^] $Message END } #------------------------------------------------------------------------------ # Prints the message that informs the user of a failed login #------------------------------------------------------------------------------ sub PrintLoginFailedMessage { print <
login: admin
password:
Login incorrect

 END } #------------------------------------------------------------------------------ # Prints the HTML form for logging in #------------------------------------------------------------------------------ sub PrintLoginForm { print <
login: admin
password:
END } #------------------------------------------------------------------------------ # Prints the footer for the HTML Page #------------------------------------------------------------------------------ sub PrintPageFooter { print ""; } #------------------------------------------------------------------------------ # Retreives the values of all cookies. The cookies can be accesses using the # variable $Cookies{''} #------------------------------------------------------------------------------ sub GetCookies { @httpcookies = split(/; /,$ENV{'HTTP_COOKIE'}); foreach $cookie(@httpcookies) { ($id, $val) = split(/=/, $cookie); $Cookies{$id} = $val; } } #------------------------------------------------------------------------------ # Prints the screen when the user logs out #------------------------------------------------------------------------------ sub PrintLogoutScreen { print "Connection closed by foreign host.

"; } #------------------------------------------------------------------------------ # Logs out the user and allows the user to login again #------------------------------------------------------------------------------ sub PerformLogout { print "Set-Cookie: SAVEDPWD=;\n"; # remove password cookie &PrintPageHeader("p"); &PrintLogoutScreen; &PrintLoginScreen; &PrintLoginForm; &PrintPageFooter; } #------------------------------------------------------------------------------ # This function is called to login the user. If the password matches, it # displays a page that allows the user to run commands. If the password doens't # match or if no password is entered, it displays a form that allows the user # to login #------------------------------------------------------------------------------ sub PerformLogin { if($LoginPassword eq $Password) # password matched { print "Set-Cookie: SAVEDPWD=$LoginPassword;\n"; &PrintPageHeader("c"); &PrintCommandLineInputForm; &PrintPageFooter; } else # password didn't match { &PrintPageHeader("p"); &PrintLoginScreen; if($LoginPassword ne "") # some password was entered { &PrintLoginFailedMessage; } &PrintLoginForm; &PrintPageFooter; } } #------------------------------------------------------------------------------ # Prints the HTML form that allows the user to enter commands #------------------------------------------------------------------------------ sub PrintCommandLineInputForm { $Prompt = $WinNT ? "$CurrentDir> " : "[admin\@$ServerName $CurrentDir]\$ "; print <