diff options
Diffstat (limited to 'system/libraries')
| -rw-r--r-- | system/libraries/Form_validation.php | 42 | ||||
| -rw-r--r-- | system/libraries/Image_lib.php | 2 | ||||
| -rw-r--r-- | system/libraries/Upload.php | 103 |
3 files changed, 95 insertions, 52 deletions
diff --git a/system/libraries/Form_validation.php b/system/libraries/Form_validation.php index 0a6a2af0d..2ee734ae6 100644 --- a/system/libraries/Form_validation.php +++ b/system/libraries/Form_validation.php @@ -703,11 +703,11 @@ class CI_Form_validation { * * @param string the field name * @param string - * @return void + * @return string */ public function set_value($field = '', $default = '') { - if ( ! isset($this->_field_data[$field])) + if ( ! isset($this->_field_data[$field], $this->_field_data[$field]['postdata'])) { return $default; } @@ -736,13 +736,9 @@ class CI_Form_validation { */ public function set_select($field = '', $value = '', $default = FALSE) { - if ( ! isset($this->_field_data[$field]) OR ! isset($this->_field_data[$field]['postdata'])) + if ( ! isset($this->_field_data[$field], $this->_field_data[$field]['postdata'])) { - if ($default === TRUE AND count($this->_field_data) === 0) - { - return ' selected="selected"'; - } - return ''; + return ($default === TRUE && count($this->_field_data) === 0) ? ' selected="selected"' : ''; } $field = $this->_field_data[$field]['postdata']; @@ -754,12 +750,9 @@ class CI_Form_validation { return ''; } } - else + elseif (($field == '' OR $value == '') OR ($field != $value)) { - if (($field == '' OR $value == '') OR ($field != $value)) - { - return ''; - } + return ''; } return ' selected="selected"'; @@ -779,13 +772,9 @@ class CI_Form_validation { */ public function set_radio($field = '', $value = '', $default = FALSE) { - if ( ! isset($this->_field_data[$field]) OR ! isset($this->_field_data[$field]['postdata'])) + if ( ! isset($this->_field_data[$field], $this->_field_data[$field]['postdata'])) { - if ($default === TRUE AND count($this->_field_data) === 0) - { - return ' checked="checked"'; - } - return ''; + return ($default === TRUE && count($this->_field_data) === 0) ? ' checked="checked"' : ''; } $field = $this->_field_data[$field]['postdata']; @@ -869,9 +858,7 @@ class CI_Form_validation { return FALSE; } - $field = $_POST[$field]; - - return ($str === $field); + return ($str === $_POST[$field]); } // -------------------------------------------------------------------- @@ -908,7 +895,7 @@ class CI_Form_validation { */ public function min_length($str, $val) { - if (preg_match("/[^0-9]/", $val)) + if (preg_match('/[^0-9]/', $val)) { return FALSE; } @@ -932,7 +919,7 @@ class CI_Form_validation { */ public function max_length($str, $val) { - if (preg_match("/[^0-9]/", $val)) + if (preg_match('/[^0-9]/', $val)) { return FALSE; } @@ -956,7 +943,7 @@ class CI_Form_validation { */ public function exact_length($str, $val) { - if (preg_match("/[^0-9]/", $val)) + if (preg_match('/[^0-9]/', $val)) { return FALSE; } @@ -1170,7 +1157,7 @@ class CI_Form_validation { */ public function is_natural_no_zero($str) { - return ($str != 0 AND preg_match('/^[0-9]+$/', $str)); + return ($str != 0 && preg_match('/^[0-9]+$/', $str)); } // -------------------------------------------------------------------- @@ -1217,7 +1204,7 @@ class CI_Form_validation { return $data; } - return str_replace(array("'", '"', '<', '>'), array("'", """, '<', '>'), stripslashes($data)); + return str_replace(array("'", '"', '<', '>'), array(''', '"', '<', '>'), stripslashes($data)); } // -------------------------------------------------------------------- @@ -1283,7 +1270,6 @@ class CI_Form_validation { } } -// END Form Validation Class /* End of file Form_validation.php */ /* Location: ./system/libraries/Form_validation.php */ diff --git a/system/libraries/Image_lib.php b/system/libraries/Image_lib.php index 5ea830fb1..9826eabdd 100644 --- a/system/libraries/Image_lib.php +++ b/system/libraries/Image_lib.php @@ -251,7 +251,7 @@ class CI_Image_lib { } else { - if (function_exists('realpath') && @realpath($this->new_image) !== FALSE) + if (strpos($this->new_image, '/') === FALSE AND strpos($this->new_image, '\\') === FALSE) { $full_dest_path = str_replace('\\', '/', realpath($this->new_image)); } diff --git a/system/libraries/Upload.php b/system/libraries/Upload.php index 0c63886e7..82383f658 100644 --- a/system/libraries/Upload.php +++ b/system/libraries/Upload.php @@ -1026,47 +1026,104 @@ class CI_Upload { */ protected function _file_mime_type($file) { - // Use if the Fileinfo extension, if available (only versions above 5.3 support the FILEINFO_MIME_TYPE flag) - if ( (float) substr(phpversion(), 0, 3) >= 5.3 && function_exists('finfo_file')) + // We'll need this to validate the MIME info string (e.g. text/plain; charset=us-ascii) + $regexp = '/^([a-z\-]+\/[a-z0-9\-\.\+]+)(;\s.+)?$/'; + + /* Fileinfo extension - most reliable method + * + * Unfortunately, prior to PHP 5.3 - it's only available as a PECL extension and the + * more convenient FILEINFO_MIME_TYPE flag doesn't exist. + */ + if (function_exists('finfo_file')) { - $finfo = new finfo(FILEINFO_MIME_TYPE); - if ($finfo !== FALSE) // This is possible, if there is no magic MIME database file found on the system + $finfo = finfo_open(FILEINFO_MIME); + if (is_resource($finfo)) // It is possible that a FALSE value is returned, if there is no magic MIME database file found on the system { - $file_type = $finfo->file($file['tmp_name']); + $mime = @finfo_file($finfo, $file['tmp_name']); + finfo_close($finfo); /* According to the comments section of the PHP manual page, * it is possible that this function returns an empty string * for some files (e.g. if they don't exist in the magic MIME database) */ - if (strlen($file_type) > 1) + if (is_string($mime) && preg_match($regexp, $mime, $matches)) { - $this->file_type = $file_type; + $this->file_type = $matches[1]; return; } } } - // Fall back to the deprecated mime_content_type(), if available - if (function_exists('mime_content_type')) - { - $this->file_type = @mime_content_type($file['tmp_name']); - return; - } - - /* This is an ugly hack, but UNIX-type systems provide a native way to detect the file type, - * which is still more secure than depending on the value of $_FILES[$field]['type']. + /* This is an ugly hack, but UNIX-type systems provide a "native" way to detect the file type, + * which is still more secure than depending on the value of $_FILES[$field]['type'], and as it + * was reported in issue #750 (https://github.com/EllisLab/CodeIgniter/issues/750) - it's better + * than mime_content_type() as well, hence the attempts to try calling the command line with + * three different functions. * * Notes: - * - a 'W' in the substr() expression bellow, would mean that we're using Windows - * - many system admins would disable the exec() function due to security concerns, hence the function_exists() check + * - the DIRECTORY_SEPARATOR comparison ensures that we're not on a Windows system + * - many system admins would disable the exec(), shell_exec(), popen() and similar functions + * due to security concerns, hence the function_exists() checks */ - if (DIRECTORY_SEPARATOR !== '\\' && function_exists('exec')) + if (DIRECTORY_SEPARATOR !== '\\') { - $output = array(); - @exec('file --brief --mime-type ' . escapeshellarg($file['tmp_path']), $output, $return_code); - if ($return_code === 0 && strlen($output[0]) > 0) // A return status code != 0 would mean failed execution + $cmd = 'file --brief --mime ' . escapeshellarg($file['tmp_name']) . ' 2>&1'; + + if (function_exists('exec')) + { + /* This might look confusing, as $mime is being populated with all of the output when set in the second parameter. + * However, we only neeed the last line, which is the actual return value of exec(), and as such - it overwrites + * anything that could already be set for $mime previously. This effectively makes the second parameter a dummy + * value, which is only put to allow us to get the return status code. + */ + $mime = @exec($cmd, $mime, $return_status); + if ($return_status === 0 && is_string($mime) && preg_match($regexp, $mime, $matches)) + { + $this->file_type = $matches[1]; + return; + } + } + + if ( (bool) @ini_get('safe_mode') === FALSE && function_exists('shell_exec')) + { + $mime = @shell_exec($cmd); + if (strlen($mime) > 0) + { + $mime = explode("\n", trim($mime)); + if (preg_match($regexp, $mime[(count($mime) - 1)], $matches)) + { + $this->file_type = $matches[1]; + return; + } + } + } + + if (function_exists('popen')) + { + $proc = @popen($cmd, 'r'); + if (is_resource($proc)) + { + $mime = @fread($test, 512); + @pclose($proc); + if ($mime !== FALSE) + { + $mime = explode("\n", trim($mime)); + if (preg_match($regexp, $mime[(count($mime) - 1)], $matches)) + { + $this->file_type = $matches[1]; + return; + } + } + } + } + } + + // Fall back to the deprecated mime_content_type(), if available (still better than $_FILES[$field]['type']) + if (function_exists('mime_content_type')) + { + $this->file_type = @mime_content_type($file['tmp_name']); + if (strlen($this->file_type) > 0) // It's possible that mime_content_type() returns FALSE or an empty string { - $this->file_type = rtrim($output[0]); return; } } |