phpmyadmin/libraries/tbl_replace_fields.inc.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * handle field values (possibly uploaded from a file)
   5  *
   6  * garvin: original if-clause checked, whether input was stored in a possible
   7  * fields_upload_XX var. Now check, if the field is set. If it is empty or a
   8  * malicious file, do not alter fields contents. If an empty or invalid file is
   9  * specified, the binary data gets deleter. Maybe a nice new text-variable is
  10  * appropriate to document this behaviour.
  11  *
  12  * garvin: security cautions! You could trick the form and submit any file the
  13  * webserver has access to for upload to a binary field. Shouldn't be that easy! ;)
  14  *
  15  * garvin: default is to advance to the field-value parsing. Will only be set to
  16  * true when a binary file is uploaded, thus bypassing further manipulation of $val.
  17  *
  18  * note: grab_globals has extracted the fields from _FILES or HTTP_POST_FILES
  19  *
  20  * @version $Id$
  21  *
  22  * @uses $_REQUEST
  23  * @uses defined()
  24  * @uses define()
  25  * @uses bin2hex()
  26  * @uses strlen()
  27  * @uses md5()
  28  * @uses implode()
  29  * @uses PMA_NO_VARIABLES_IMPORT
  30  * @uses PMA_sqlAddslashes()
  31  */
  32 if (! defined('PHPMYADMIN')) {
  33     exit;
  34 }
  35
  36 /**
  37  * do not import request variable into global scope
  38  */
  39 if (! defined('PMA_NO_VARIABLES_IMPORT')) {
  40     define('PMA_NO_VARIABLES_IMPORT', true);
  41 }
  42 /**
  43  * Gets some core libraries
  44  */
  45 require_once './libraries/common.inc.php';
  46 require_once './libraries/File.class.php';
  47
  48 $file_to_insert = new PMA_File();
  49 $file_to_insert->checkTblChangeForm($key, $rowcount);
  50
  51 $possibly_uploaded_val = $file_to_insert->getContent();
  52
  53 if ($file_to_insert->isError()) {
  54     $message .= $file_to_insert->getError();
  55 }
  56 $file_to_insert->cleanUp();
  57
  58 if (false !== $possibly_uploaded_val) {
  59     $val = $possibly_uploaded_val;
  60 } else {
  61
  62     // f i e l d    v a l u e    i n    t h e    f o r m
  63
  64     if (isset($me_fields_type[$key])) {
  65         $type = $me_fields_type[$key];
  66     } else {
  67         $type = '';
  68     }
  69
  70     $f = 'field_' . md5($key);
  71
  72     if (0 === strlen($val)) {
  73         // default
  74         $val = "''";
  75
  76         switch ($type) {
  77             case 'enum':
  78                 // if we have an enum, then construct the value
  79             case 'set':
  80                 // if we have a set, then construct the value
  81             case 'foreign':
  82                 // if we have a foreign key, then construct the value
  83                 if (! empty($_REQUEST[$f]['multi_edit'][$rowcount])) {
  84                     $val = implode(',', $_REQUEST[$f]['multi_edit'][$rowcount]);
  85                     $val = "'" . PMA_sqlAddslashes($val) . "'";
  86                 }
  87                 break;
  88             case 'protected':
  89                 // here we are in protected mode (asked in the config)
  90                 // so tbl_change has put this special value in the
  91                 // fields array, so we do not change the field value
  92                 // but we can still handle field upload
  93
  94                 // garvin: when in UPDATE mode, do not alter field's contents. When in INSERT
  95                 // mode, insert empty field because no values were submitted. If protected
  96                 // blobs where set, insert original fields content.
  97                 if (! empty($prot_row[$key])) {
  98                     $val = '0x' . bin2hex($prot_row[$key]);
  99                 } else {
 100                     $val = '';
 101                 }
 102
 103                 break;
 104             default:
 105                 // best way to avoid problems in strict mode (works also in non-strict mode)
 106                 if (isset($me_auto_increment)  && isset($me_auto_increment[$key])) {
 107                     $val = 'NULL';
 108                 }
 109                 break;
 110         }
 111     } elseif ($type == 'bit') {
 112         $val = preg_replace('/[^01]/', '0', $val);
 113         $val = "b'" . PMA_sqlAddslashes($val) . "'";
 114     } elseif (! ($type == 'timestamp' && $val == 'CURRENT_TIMESTAMP')) {
 115         $val = "'" . PMA_sqlAddslashes($val) . "'";
 116     }
 117
 118     // Was the Null checkbox checked for this field?
 119     // (if there is a value, we ignore the Null checkbox: this could
 120     // be possible if Javascript is disabled in the browser)
 121     if (isset($me_fields_null[$key])
 122      && $val == "''") {
 123         $val = 'NULL';
 124     }
 125
 126     // The Null checkbox was unchecked for this field
 127     if (empty($val) && isset($me_fields_null_prev[$key]) && ! isset($me_fields_null[$key])) {
 128         $val = "''";
 129     }
 130 }  // end else (field value in the form)
 131 unset($type, $f);
 132 ?>