4646/**
4747 * Serialized format reader.
4848 */
49- class ODPresentation implements ReaderInterface
49+ class ODPresentation extends AbstractReader implements ReaderInterface
5050{
5151 /**
5252 * Output Object.
@@ -62,6 +62,11 @@ class ODPresentation implements ReaderInterface
6262 */
6363 protected $ oZip
6464
65+ /**
66+ * @var string
67+ */
68+ protected $ filename
69+
6570 /**
6671 * @var array<string, array{alignment: null|Alignment, background: null, shadow: null|Shadow, fill: null|Fill, spacingAfter: null|int, spacingBefore: null|int, lineSpacingMode: null, lineSpacing: null, font: null, listStyle: null}>
6772 */
@@ -77,6 +82,11 @@ class ODPresentation implements ReaderInterface
7782 */
7883 protected $ oXMLReader
7984
85+ /**
86+ * @var XMLReader
87+ */
88+ protected $ oXMLMetaInfManifest
89+
8090 /**
8191 * @var int
8292 */
@@ -142,22 +152,21 @@ public function load(string $pFilename, int $flags = 0): PhpPresentation
142152 */
143153 protected function loadFile ($ pFilename
144154 {
155+ $ this filename = $ pFilename
156+
145157 $ this oPhpPresentation = new PhpPresentation ();
146158 $ this oPhpPresentation ->removeSlideByIndex ();
147159
148160 $ this oZip = new ZipArchive ();
149- $ this oZip ->open ($ pFilename
161+ $ this oZip ->open ($ this -> filename );
150162
151- $ this oXMLReader = new XMLReader ();
152- if (false !== $ this oXMLReader ->getDomFromZip ($ pFilename'meta.xml ' )) {
163+ if ($ this loadFileFromODP ('meta.xml ' ) !== false ) {
153164 $ this loadDocumentProperties ();
154165 }
155- $ this oXMLReader = new XMLReader ();
156- if (false !== $ this oXMLReader ->getDomFromZip ($ pFilename'styles.xml ' )) {
166+ if ($ this loadFileFromODP ('styles.xml ' ) !== false ) {
157167 $ this loadStylesFile ();
158168 }
159- $ this oXMLReader = new XMLReader ();
160- if (false !== $ this oXMLReader ->getDomFromZip ($ pFilename'content.xml ' )) {
169+ if ($ this loadFileFromODP ('content.xml ' ) !== false ) {
161170 $ this loadSlides ();
162171 $ this loadPresentationProperties ();
163172 }
@@ -762,6 +771,107 @@ protected function loadStylesFile(): void
762771 }
763772 }
764773
774+ /**
775+ * @param string $filename
776+ *
777+ * @return bool
778+ */
779+ protected function loadFileFromODP ($ filename
780+ {
781+ $ bEncryptedfalse ;
782+
783+ if (!$ this oXMLMetaInfManifest ) {
784+ $ this oXMLMetaInfManifest = new XMLReader ();
785+ if ($ this oXMLMetaInfManifest ->getDomFromZip ($ this filename , 'META-INF/manifest.xml ' ) === false ) {
786+ return false ;
787+ }
788+ }
789+ // Search file in META-INF/manifest.xml
790+ $ oElement$ this oXMLMetaInfManifest ->getElement ('/manifest:manifest/manifest:file-entry[@manifest:full-path= \'' . $ filename'\'] ' );
791+ if (!$ oElement
792+ return false ;
793+ }
794+ // Has it some manifest:encryption-data ?
795+ $ oElementEncryption$ this oXMLMetaInfManifest ->getElement ('manifest:encryption-data ' , $ oElement
796+ if ($ oElementEncryption
797+ $ bEncryptedtrue ;
798+ }
799+
800+ $ fileContent$ this oZip ->getFromName ($ filename
801+ if (!$ fileContent
802+ return false ;
803+ }
804+
805+ // No Encrypted file
806+ if (!$ bEncrypted
807+ $ this oXMLReader = new XMLReader ();
808+ $ this oXMLReader ->getDomFromString ($ fileContent
809+
810+ return true ;
811+ }
812+ var_dump ($ filename
813+
814+ //return false;
815+ /*
816+ <manifest:file-entry manifest:full-path="meta.xml" manifest:media-type="text/xml" manifest:size="2090">
817+ <manifest:encryption-data
818+ manifest:checksum-type="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0#sha256-1k"
819+ manifest:checksum="BfB+taOY0kcVO/9WNi4DfqioRp3LMwVoNbqfAQ37yac=">
820+ <manifest:algorithm
821+ manifest:algorithm-name="http://www.w3.org/2001/04/xmlenc#aes256-cbc"
822+ manifest:initialisation-vector="I7rMXmvuynJFxJtm+EQ5qA=="/>
823+ <manifest:key-derivation
824+ manifest:key-derivation-name="PBKDF2"
825+ manifest:key-size="32"
826+ manifest:iteration-count="1024"
827+ manifest:salt="Mows9XX/YiNKNJ0qll3jgA=="/>
828+ <manifest:start-key-generation
829+ manifest:start-key-generation-name="http://www.w3.org/2000/09/xmldsig#sha256"
830+ manifest:key-size="32"/>
831+ </manifest:encryption-data>
832+ </manifest:file-entry>
833+ */
834+ // Encrypted file
835+ $ checksum$ oElementEncryptiongetAttribute ('manifest:checksum ' );
836+
837+ $ oEltKeyDerivation$ this oXMLMetaInfManifest ->getElement ('manifest:key-derivation ' , $ oElementEncryption
838+ $ salt$ oEltKeyDerivationgetAttribute ('manifest:salt ' );
839+ //$salt = base64_decode($salt);
840+ echo 'manifest:salt : ' . $ saltPHP_EOL ;
841+ $ iterationCountint ) $ oEltKeyDerivationgetAttribute ('manifest:iteration-count ' );
842+ echo 'manifest:iteration-count : ' . $ iterationCountPHP_EOL ;
843+ $ keySizeint ) $ oEltKeyDerivationgetAttribute ('manifest:key-size ' ) ?? 16 ;
844+ echo 'manifest:key-size : ' . $ keySizePHP_EOL ;
845+
846+ $ oEltAlgorithm$ this oXMLMetaInfManifest ->getElement ('manifest:algorithm ' , $ oElementEncryption
847+ $ iv$ oEltAlgorithmgetAttribute ('manifest:initialisation-vector ' );
848+ $ ivbase64_decode ($ iv
849+ echo 'manifest:initialisation-vector : ' . $ ivPHP_EOL ;
850+
851+ // manifest:start-key-generation-name == sha256 sinon sha1
852+ $ pwdHashhash ('sha256 ' , $ this getPassword ());
853+ echo 'sha256( ' . $ this getPassword () . '): ' . $ pwdHashPHP_EOL ;
854+ //$pwdHash = substr($pwdHash, 0 , 32);
855+ //var_dump($pwdHash);
856+
857+ // ifmanifest:key-derivation-name="PBKDF2" THEN PBKDF2WithHmacSHA1 SINON ?
858+ $ keyhash_pbkdf2 ('sha1 ' , $ pwdHash$ salt$ iterationCount$ keySizetrue );
859+ echo 'hash_pbkdf2 (sha1, hash, salt, iterationCount, $iterationCount) : ' . $ keyPHP_EOL ;
860+
861+ $ dataopenssl_decrypt ($ fileContent'AES-256-CBC ' , $ key0 , $ iv
862+ if (!$ data
863+ while ($ msgopenssl_error_string ()) {
864+ var_dump ($ msg
865+ }
866+ die ();
867+ }
868+ var_dump ($ data
869+ $ datagzinflate ($ data
870+ var_dump ($ data
871+
872+ return false ;
873+ }
874+
765875 private function getExpressionUnit (string $ exprstring
766876 {
767877 if (substr ($ expr1 ) == '% ' ) {
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