Collaboration diagram for ilQtiMatImageSecurity:

Public Member Functions
	__construct (ilQTIMatimage $imageMaterial)

	getImageMaterial ()

	setImageMaterial ($imageMaterial)

	validate ()

	sanitizeLabel ()

Protected Member Functions
	getDetectedMimeType ()

	setDetectedMimeType ($detectedMimeType)

	validateContent ()

	validateLabel ()

	determineMimeType ($content)

	determineFileExtension ($label)

Protected Attributes
	$imageMaterial

	$detectedMimeType

Detailed Description

Definition at line 14 of file class.ilQtiMatImageSecurity.php.

Constructor & Destructor Documentation

◆ __construct()

ilQtiMatImageSecurity::__construct ( ilQTIMatimage $imageMaterial )

Definition at line 26 of file class.ilQtiMatImageSecurity.php.

        {
                $this->setImageMaterial($imageMaterial);
                
                if( !strlen($this->getImageMaterial()->getRawContent()) )
                {
                        throw new ilQtiException('cannot import image without content');
                }
                
                $this->setDetectedMimeType(
                        $this->determineMimeType($this->getImageMaterial()->getRawContent())
                );
        }

References determineMimeType(), getImageMaterial(), setDetectedMimeType(), and setImageMaterial().

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Member Function Documentation

◆ determineFileExtension()

ilQtiMatImageSecurity::determineFileExtension ( $label )

protected

Definition at line 151 of file class.ilQtiMatImageSecurity.php.

        {
                list($dirname, $basename, $extension, $filename) = array_values( pathinfo($label) );
                return $extension;
        }

References $filename.

Referenced by validateLabel().

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◆ determineMimeType()

ilQtiMatImageSecurity::determineMimeType ( $content )

protected

Definition at line 146 of file class.ilQtiMatImageSecurity.php.

        {
                return ilFileUtils::lookupContentMimeType($content);
        }

References ilFileUtils\lookupContentMimeType().

Referenced by __construct().

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◆ getDetectedMimeType()

ilQtiMatImageSecurity::getDetectedMimeType ( )

protected

Returns: string

Definition at line 59 of file class.ilQtiMatImageSecurity.php.

        {
                return $this->detectedMimeType;
        }

References $detectedMimeType.

Referenced by validateContent(), and validateLabel().

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◆ getImageMaterial()

ilQtiMatImageSecurity::getImageMaterial ( )

Returns: ilQTIMatimage

Definition at line 43 of file class.ilQtiMatImageSecurity.php.

        {
                return $this->imageMaterial;
        }

References $imageMaterial.

Referenced by __construct(), sanitizeLabel(), validateContent(), and validateLabel().

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◆ sanitizeLabel()

ilQtiMatImageSecurity::sanitizeLabel ( )

Definition at line 135 of file class.ilQtiMatImageSecurity.php.

        {
                $label = $this->getImageMaterial()->getLabel();
                
                $label = basename($label);
                $label = ilUtil::stripSlashes($label);
                $label = ilUtil::getASCIIFilename($label);
                
                $this->getImageMaterial()->setLabel($label);
        }

References ilUtil\getASCIIFilename(), getImageMaterial(), and ilUtil\stripSlashes().

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◆ setDetectedMimeType()

ilQtiMatImageSecurity::setDetectedMimeType ( $detectedMimeType )

protected

Parameters

string $detectedMimeType

Definition at line 67 of file class.ilQtiMatImageSecurity.php.

        {
                $this->detectedMimeType = $detectedMimeType;
        }

References $detectedMimeType.

Referenced by __construct().

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◆ setImageMaterial()

ilQtiMatImageSecurity::setImageMaterial ( $imageMaterial )

Parameters

ilQTIMatimage $imageMaterial

Definition at line 51 of file class.ilQtiMatImageSecurity.php.

        {
                $this->imageMaterial = $imageMaterial;
        }

References $imageMaterial.

Referenced by __construct().

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◆ validate()

ilQtiMatImageSecurity::validate ( )

Definition at line 72 of file class.ilQtiMatImageSecurity.php.

        {
                if( !$this->validateLabel() )
                {
                        return false;
                }
                
                if( !$this->validateContent() )
                {
                        return false;
                }
                
                return true;
        }

References validateContent(), and validateLabel().

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◆ validateContent()

ilQtiMatImageSecurity::validateContent ( )

protected

Definition at line 87 of file class.ilQtiMatImageSecurity.php.

        {
                if($this->getImageMaterial()->getImagetype() && !assQuestion::isAllowedImageMimeType($this->getImageMaterial()->getImagetype()) )
                {
                        return false;
                }
 
                if( !assQuestion::isAllowedImageMimeType($this->getDetectedMimeType()) )
                {
                        return false;
                }
 
                if ($this->getImageMaterial()->getImagetype())
                {
                        $declaredMimeType = assQuestion::fetchMimeTypeIdentifier($this->getImageMaterial()->getImagetype());
                        $detectedMimeType = assQuestion::fetchMimeTypeIdentifier($this->getDetectedMimeType());
 
                        if( $declaredMimeType != $detectedMimeType )
                        {
                                // since ilias exports jpeg declared pngs itself, we skip this validation ^^
                                // return false;
                                
                                /* @var ilComponentLogger $log */
                                $log = $GLOBALS['DIC'] ? $GLOBALS['DIC']['ilLog'] : $GLOBALS['ilLog'];
                                $log->log(
                                        'QPL: imported image with declared mime ('.$declaredMimeType.') '
                                        .'and detected mime ('.$detectedMimeType.')'
                                );
                        }
                }
 
                return true;
        }

References $detectedMimeType, $GLOBALS, $log, assQuestion\fetchMimeTypeIdentifier(), getDetectedMimeType(), getImageMaterial(), and assQuestion\isAllowedImageMimeType().

Referenced by validate().

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◆ validateLabel()

ilQtiMatImageSecurity::validateLabel ( )

protected

Definition at line 121 of file class.ilQtiMatImageSecurity.php.

        {
                if ($this->getImageMaterial()->getUri())
                {
                        $extension = $this->determineFileExtension($this->getImageMaterial()->getUri());
                }
                else
                {
                        $extension = $this->determineFileExtension($this->getImageMaterial()->getLabel());
                }
 
                return assQuestion::isAllowedImageFileExtension($this->getDetectedMimeType(), $extension);
        }