pdf: test hybrid mode (PDF attachment) with encryption

This adds a test that checks the attached file is correctly added
to the PDF stream when encryption is enabled.

Also add support for reading of attachments to PDFium wrapper.

The test saves a document as encrypted PDF with hybrid mode enabled,
then opens the document in PDFium and saves the attachment content
to a temporary file, which is opened again and the content checked.

Change-Id: I918f67d269c31fe7826a49473e939d52bac7fe98
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/178629
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/178778
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tested-by: Jenkins

4 files changed, 481 insertions, 0 deletions

diff --git a/include/vcl/filter/PDFiumLibrary.hxx b/include/vcl/filter/PDFiumLibrary.hxx
index 16253efda442..28fc9a0f2606 100644
--- a/include/vcl/filter/PDFiumLibrary.hxx
+++ b/include/vcl/filter/PDFiumLibrary.hxx
@@ -225,6 +225,15 @@ public:
     virtual css::util::DateTime getTime() = 0;
 };
 
+class VCL_DLLPUBLIC PDFiumAttachment
+{
+public:
+    virtual ~PDFiumAttachment() = default;
+
+    virtual OUString getName() = 0;
+    virtual bool getFile(std::vector<unsigned char>& rOutBuffer) = 0;
+};
+
 class VCL_DLLPUBLIC PDFiumDocument
 {
 public:
@@ -235,10 +244,13 @@ public:
     virtual int getPageCount() = 0;
     virtual int getSignatureCount() = 0;
     virtual int getFileVersion() = 0;
+    virtual int getAttachmentCount() = 0;
     virtual bool saveWithVersion(SvMemoryStream& rStream, int nFileVersion) = 0;
 
     virtual std::unique_ptr<PDFiumPage> openPage(int nIndex) = 0;
     virtual std::unique_ptr<PDFiumSignature> getSignature(int nIndex) = 0;
+    virtual std::unique_ptr<PDFiumAttachment> getAttachment(int nIndex) = 0;
+
     virtual std::vector<unsigned int> getTrailerEnds() = 0;
     virtual OUString getBookmarks() = 0;
 };
diff --git a/vcl/qa/cppunit/pdfexport/data/SimpleTestDocument.fodt b/vcl/qa/cppunit/pdfexport/data/SimpleTestDocument.fodt
new file mode 100644
index 000000000000..3978e97559fd
--- /dev/null
+++ b/vcl/qa/cppunit/pdfexport/data/SimpleTestDocument.fodt
@@ -0,0 +1,350 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<office:document xmlns:css3t="http://www.w3.org/TR/css3-text/" xmlns:grddl="http://www.w3.org/2003/g/data-view#" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xforms="http://www.w3.org/2002/xforms" xmlns:dom="http://www.w3.org/2001/xml-events" xmlns:script="urn:oasis:names:tc:opendocument:xmlns:script:1.0" xmlns:form="urn:oasis:names:tc:opendocument:xmlns:form:1.0" xmlns:math="http://www.w3.org/1998/Math/MathML" xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:ooo="http://openoffice.org/2004/office" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:config="urn:oasis:names:tc:opendocument:xmlns:config:1.0" xmlns:ooow="http://openoffice.org/2004/writer" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:drawooo="http://openoffice.org/2010/draw" xmlns:oooc="http://openoffice.org/2004/calc" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:calcext="urn:org:documentfoundation:names:experimental:calc:xmlns:calcext:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:of="urn:oasis:names:tc:opendocument:xmlns:of:1.2" xmlns:tableooo="http://openoffice.org/2009/table" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:dr3d="urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0" xmlns:rpt="http://openoffice.org/2005/report" xmlns:formx="urn:openoffice:names:experimental:ooxml-odf-interop:xmlns:form:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:chart="urn:oasis:names:tc:opendocument:xmlns:chart:1.0" xmlns:officeooo="http://openoffice.org/2009/office" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:field="urn:openoffice:names:experimental:ooo-ms-interop:xmlns:field:1.0" xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:loext="urn:org:documentfoundation:names:experimental:office:xmlns:loext:1.0" office:version="1.3" office:mimetype="application/vnd.oasis.opendocument.text">
+ <office:meta><meta:initial-creator>FirstName LastName</meta:initial-creator><meta:creation-date>2024-12-17T11:47:27.462272201</meta:creation-date><dc:date>2024-12-17T11:48:46.695838814</dc:date><dc:creator>FirstName LastName</dc:creator><meta:editing-duration>PT1M20S</meta:editing-duration><meta:editing-cycles>1</meta:editing-cycles><meta:document-statistic meta:table-count="0" meta:image-count="0" meta:object-count="0" meta:page-count="1" meta:paragraph-count="1" meta:word-count="5" meta:character-count="24" meta:non-whitespace-character-count="20"/><meta:generator>Collabora_OfficeDev/24.04.11.0$Linux_X86_64 LibreOffice_project/4203a38a1138d86389e402dbbd814f7a352cea2a</meta:generator></office:meta>
+ <office:settings>
+  <config:config-item-set config:name="ooo:view-settings">
+   <config:config-item config:name="ViewAreaTop" config:type="long">0</config:config-item>
+   <config:config-item config:name="ViewAreaLeft" config:type="long">0</config:config-item>
+   <config:config-item config:name="ViewAreaWidth" config:type="long">34398</config:config-item>
+   <config:config-item config:name="ViewAreaHeight" config:type="long">16198</config:config-item>
+   <config:config-item config:name="ShowRedlineChanges" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="InBrowseMode" config:type="boolean">false</config:config-item>
+   <config:config-item-map-indexed config:name="Views">
+    <config:config-item-map-entry>
+     <config:config-item config:name="ViewId" config:type="string">view2</config:config-item>
+     <config:config-item config:name="ViewLeft" config:type="long">12707</config:config-item>
+     <config:config-item config:name="ViewTop" config:type="long">2501</config:config-item>
+     <config:config-item config:name="VisibleLeft" config:type="long">0</config:config-item>
+     <config:config-item config:name="VisibleTop" config:type="long">0</config:config-item>
+     <config:config-item config:name="VisibleRight" config:type="long">34396</config:config-item>
+     <config:config-item config:name="VisibleBottom" config:type="long">16196</config:config-item>
+     <config:config-item config:name="ZoomType" config:type="short">0</config:config-item>
+     <config:config-item config:name="ViewLayoutColumns" config:type="short">1</config:config-item>
+     <config:config-item config:name="ViewLayoutBookMode" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="ZoomFactor" config:type="short">140</config:config-item>
+     <config:config-item config:name="IsSelectedFrame" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="KeepRatio" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="AnchoredTextOverflowLegacy" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="LegacySingleLineFontwork" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="ConnectorUseSnapRect" config:type="boolean">false</config:config-item>
+     <config:config-item config:name="IgnoreBreakAfterMultilineField" config:type="boolean">false</config:config-item>
+    </config:config-item-map-entry>
+   </config:config-item-map-indexed>
+  </config:config-item-set>
+  <config:config-item-set config:name="ooo:configuration-settings">
+   <config:config-item config:name="PrintProspectRTL" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="PrintPageBackground" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PrintDrawings" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PrintFaxName" config:type="string"/>
+   <config:config-item config:name="PrintReversed" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="PrintAnnotationMode" config:type="short">0</config:config-item>
+   <config:config-item config:name="PrintHiddenText" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="PrintEmptyPages" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PrintGraphics" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="NoNumberingShowFollowBy" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="HyphenateURLs" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ImagePreferredDPI" config:type="int">0</config:config-item>
+   <config:config-item config:name="FootnoteInColumnToPageEnd" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="GutterAtTop" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ContinuousEndnotes" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="FrameAutowidthWithMorePara" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="SubtractFlysAnchoredAtFlys" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="SurroundTextWrapSmall" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="PrintControls" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="TreatSingleColumnBreakAsPageBreak" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="TabOverSpacing" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="AutoFirstLineIndentDisregardLineSpace" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="TabOverMargin" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="EmbedComplexScriptFonts" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="EmbedAsianScriptFonts" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PrintTextPlaceholder" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ApplyTextAttrToEmptyLineAtEndOfParagraph" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="EmbedSystemFonts" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="EmbedFonts" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="DisableOffPagePositioning" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="BackgroundParaOverDrawings" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="TabOverflow" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="AllowPrintJobCancel" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="AddVerticalFrameOffsets" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ProtectBookmarks" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="AddFrameOffsets" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="PrintBlackFonts" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="TableRowKeep" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ApplyParagraphMarkFormatToNumbering" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="PrinterIndependentLayout" config:type="string">high-resolution</config:config-item>
+   <config:config-item config:name="JustifyLinesWithShrinking" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="RsidRoot" config:type="int">634772</config:config-item>
+   <config:config-item config:name="PrintProspect" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="CollapseEmptyCellPara" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PrintPaperFromSetup" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="CurrentDatabaseCommand" config:type="string"/>
+   <config:config-item config:name="CurrentDatabaseDataSource" config:type="string"/>
+   <config:config-item config:name="SaveThumbnail" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="EmbeddedDatabaseName" config:type="string"/>
+   <config:config-item config:name="UnbreakableNumberings" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="SaveGlobalDocumentLinks" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="MsWordCompTrailingBlanks" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="PrintTables" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PrintLeftPages" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="AddParaTableSpacing" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PrinterPaperFromSetup" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="CurrentDatabaseCommandType" config:type="int">0</config:config-item>
+   <config:config-item config:name="ChartAutoUpdate" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="OutlineLevelYieldsNumbering" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="UseOldNumbering" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="AddParaSpacingToTableCells" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="FieldAutoUpdate" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PropLineSpacingShrinksFirstLine" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="TabAtLeftIndentForParagraphsInList" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="PrintRightPages" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="DoNotCaptureDrawObjsOnPage" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="LoadReadonly" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="HeaderSpacingBelowLastPara" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="SaveVersionOnClose" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ClippedPictures" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="MathBaselineAlignment" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="AlignTabStopPosition" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="UseFormerLineSpacing" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="PrintSingleJobs" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="PrinterName" config:type="string"/>
+   <config:config-item config:name="AddParaLineSpacingToTableCells" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="IsKernAsianPunctuation" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="DoNotJustifyLinesWithManualBreak" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="CharacterCompressionType" config:type="short">0</config:config-item>
+   <config:config-item config:name="IsLabelDocument" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="EmbedLatinScriptFonts" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="PrinterSetup" config:type="base64Binary"/>
+   <config:config-item config:name="UseVariableWidthNBSP" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="EmbedOnlyUsedFonts" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ApplyUserData" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="AddParaTableSpacingAtStart" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="InvertBorderSpacing" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ProtectFields" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="AddExternalLeading" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="LinkUpdateMode" config:type="short">1</config:config-item>
+   <config:config-item config:name="UseFormerObjectPositioning" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="UnxForceZeroExtLeading" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="UseFormerTextWrapping" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ConsiderTextWrapOnObjPos" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="StylesNoDefault" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="IgnoreFirstLineIndentInNumbering" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="NoGapAfterNoteNumber" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="EmptyDbFieldHidesPara" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="DoNotResetParaAttrsForNumFont" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="IgnoreTabsAndBlanksForLineCalculation" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="ClipAsCharacterAnchoredWriterFlyFrames" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="DropCapPunctuation" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="UseOldPrinterMetrics" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="RedlineProtectionKey" config:type="base64Binary"/>
+   <config:config-item config:name="TabsRelativeToIndent" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="Rsid" config:type="int">670521</config:config-item>
+   <config:config-item config:name="UpdateFromTemplate" config:type="boolean">true</config:config-item>
+   <config:config-item config:name="ProtectForm" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="MsWordCompMinLineHeightByFly" config:type="boolean">false</config:config-item>
+   <config:config-item config:name="SmallCapsPercentage66" config:type="boolean">false</config:config-item>
+  </config:config-item-set>
+ </office:settings>
+ <office:scripts>
+  <office:script script:language="ooo:Basic">
+   <ooo:libraries xmlns:ooo="http://openoffice.org/2004/office" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <ooo:library-embedded ooo:name="Standard"/>
+   </ooo:libraries>
+  </office:script>
+ </office:scripts>
+ <office:font-face-decls>
+  <style:font-face style:name="Liberation Sans" svg:font-family="&apos;Liberation Sans&apos;" style:font-family-generic="swiss" style:font-pitch="variable"/>
+  <style:font-face style:name="Liberation Serif" svg:font-family="&apos;Liberation Serif&apos;" style:font-family-generic="roman" style:font-pitch="variable"/>
+  <style:font-face style:name="Noto Sans" svg:font-family="&apos;Noto Sans&apos;" style:font-family-generic="swiss"/>
+  <style:font-face style:name="Noto Sans CJK SC" svg:font-family="&apos;Noto Sans CJK SC&apos;" style:font-family-generic="system" style:font-pitch="variable"/>
+  <style:font-face style:name="Noto Sans1" svg:font-family="&apos;Noto Sans&apos;" style:font-family-generic="system" style:font-pitch="variable"/>
+  <style:font-face style:name="Noto Serif CJK SC" svg:font-family="&apos;Noto Serif CJK SC&apos;" style:font-family-generic="system" style:font-pitch="variable"/>
+ </office:font-face-decls>
+ <office:styles>
+  <style:default-style style:family="graphic">
+   <style:graphic-properties svg:stroke-color="#3465a4" draw:fill-color="#729fcf" fo:wrap-option="no-wrap" draw:shadow-offset-x="0.3cm" draw:shadow-offset-y="0.3cm" draw:start-line-spacing-horizontal="0.283cm" draw:start-line-spacing-vertical="0.283cm" draw:end-line-spacing-horizontal="0.283cm" draw:end-line-spacing-vertical="0.283cm" style:flow-with-text="false"/>
+   <style:paragraph-properties style:text-autospace="ideograph-alpha" style:line-break="strict" loext:tab-stop-distance="0cm" style:writing-mode="lr-tb" style:font-independent-line-spacing="false">
+    <style:tab-stops/>
+   </style:paragraph-properties>
+   <style:text-properties style:use-window-font-color="true" loext:opacity="0%" style:font-name="Liberation Serif" fo:font-size="12pt" fo:language="en" fo:country="GB" style:letter-kerning="true" style:font-name-asian="Noto Serif CJK SC" style:font-size-asian="10.5pt" style:language-asian="zh" style:country-asian="CN" style:font-name-complex="Noto Sans1" style:font-size-complex="12pt" style:language-complex="hi" style:country-complex="IN"/>
+  </style:default-style>
+  <style:default-style style:family="paragraph">
+   <style:paragraph-properties fo:orphans="2" fo:widows="2" fo:hyphenation-ladder-count="no-limit" style:text-autospace="ideograph-alpha" style:punctuation-wrap="hanging" style:line-break="strict" style:tab-stop-distance="1.251cm" style:writing-mode="page"/>
+   <style:text-properties style:use-window-font-color="true" loext:opacity="0%" style:font-name="Liberation Serif" fo:font-size="12pt" fo:language="en" fo:country="GB" style:letter-kerning="true" style:font-name-asian="Noto Serif CJK SC" style:font-size-asian="10.5pt" style:language-asian="zh" style:country-asian="CN" style:font-name-complex="Noto Sans1" style:font-size-complex="12pt" style:language-complex="hi" style:country-complex="IN" fo:hyphenate="false" fo:hyphenation-remain-char-count="2" fo:hyphenation-push-char-count="2" loext:hyphenation-no-caps="false" loext:hyphenation-no-last-word="false" loext:hyphenation-word-char-count="5" loext:hyphenation-zone="no-limit"/>
+  </style:default-style>
+  <style:default-style style:family="table">
+   <style:table-properties table:border-model="collapsing"/>
+  </style:default-style>
+  <style:default-style style:family="table-row">
+   <style:table-row-properties fo:keep-together="auto"/>
+  </style:default-style>
+  <style:style style:name="Standard" style:family="paragraph" style:class="text"/>
+  <style:style style:name="Heading" style:family="paragraph" style:parent-style-name="Standard" style:next-style-name="Text_20_body" style:class="text">
+   <style:paragraph-properties fo:margin-top="0.423cm" fo:margin-bottom="0.212cm" style:contextual-spacing="false" fo:keep-with-next="always"/>
+   <style:text-properties style:font-name="Liberation Sans" fo:font-family="&apos;Liberation Sans&apos;" style:font-family-generic="swiss" style:font-pitch="variable" fo:font-size="14pt" style:font-name-asian="Noto Sans CJK SC" style:font-family-asian="&apos;Noto Sans CJK SC&apos;" style:font-family-generic-asian="system" style:font-pitch-asian="variable" style:font-size-asian="14pt" style:font-name-complex="Noto Sans1" style:font-family-complex="&apos;Noto Sans&apos;" style:font-family-generic-complex="system" style:font-pitch-complex="variable" style:font-size-complex="14pt"/>
+  </style:style>
+  <style:style style:name="Text_20_body" style:display-name="Text body" style:family="paragraph" style:parent-style-name="Standard" style:class="text">
+   <style:paragraph-properties fo:margin-top="0cm" fo:margin-bottom="0.247cm" style:contextual-spacing="false" fo:line-height="115%"/>
+  </style:style>
+  <style:style style:name="List" style:family="paragraph" style:parent-style-name="Text_20_body" style:class="list">
+   <style:text-properties style:font-size-asian="12pt" style:font-name-complex="Noto Sans" style:font-family-complex="&apos;Noto Sans&apos;" style:font-family-generic-complex="swiss"/>
+  </style:style>
+  <style:style style:name="Caption" style:family="paragraph" style:parent-style-name="Standard" style:class="extra">
+   <style:paragraph-properties fo:margin-top="0.212cm" fo:margin-bottom="0.212cm" style:contextual-spacing="false" text:number-lines="false" text:line-number="0"/>
+   <style:text-properties fo:font-size="12pt" fo:font-style="italic" style:font-size-asian="12pt" style:font-style-asian="italic" style:font-name-complex="Noto Sans" style:font-family-complex="&apos;Noto Sans&apos;" style:font-family-generic-complex="swiss" style:font-size-complex="12pt" style:font-style-complex="italic"/>
+  </style:style>
+  <style:style style:name="Index" style:family="paragraph" style:parent-style-name="Standard" style:class="index">
+   <style:paragraph-properties text:number-lines="false" text:line-number="0"/>
+   <style:text-properties style:font-size-asian="12pt" style:font-name-complex="Noto Sans" style:font-family-complex="&apos;Noto Sans&apos;" style:font-family-generic-complex="swiss"/>
+  </style:style>
+  <text:outline-style style:name="Outline">
+   <text:outline-level-style text:level="1" style:num-format="">
+    <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">
+     <style:list-level-label-alignment text:label-followed-by="listtab"/>
+    </style:list-level-properties>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="2" style:num-format="">
+    <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">
+     <style:list-level-label-alignment text:label-followed-by="listtab"/>
+    </style:list-level-properties>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="3" style:num-format="">
+    <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">
+     <style:list-level-label-alignment text:label-followed-by="listtab"/>
+    </style:list-level-properties>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="4" style:num-format="">
+    <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">
+     <style:list-level-label-alignment text:label-followed-by="listtab"/>
+    </style:list-level-properties>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="5" style:num-format="">
+    <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">
+     <style:list-level-label-alignment text:label-followed-by="listtab"/>
+    </style:list-level-properties>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="6" style:num-format="">
+    <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">
+     <style:list-level-label-alignment text:label-followed-by="listtab"/>
+    </style:list-level-properties>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="7" style:num-format="">
+    <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">
+     <style:list-level-label-alignment text:label-followed-by="listtab"/>
+    </style:list-level-properties>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="8" style:num-format="">
+    <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">
+     <style:list-level-label-alignment text:label-followed-by="listtab"/>
+    </style:list-level-properties>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="9" style:num-format="">
+    <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">
+     <style:list-level-label-alignment text:label-followed-by="listtab"/>
+    </style:list-level-properties>
+   </text:outline-level-style>
+   <text:outline-level-style text:level="10" style:num-format="">
+    <style:list-level-properties text:list-level-position-and-space-mode="label-alignment">
+     <style:list-level-label-alignment text:label-followed-by="listtab"/>
+    </style:list-level-properties>
+   </text:outline-level-style>
+  </text:outline-style>
+  <text:notes-configuration text:note-class="footnote" style:num-format="1" text:start-value="0" text:footnotes-position="page" text:start-numbering-at="document"/>
+  <text:notes-configuration text:note-class="endnote" style:num-format="i" text:start-value="0"/>
+  <text:linenumbering-configuration text:number-lines="false" text:offset="0.499cm" style:num-format="1" text:number-position="left" text:increment="5"/>
+  <loext:theme loext:name="Office">
+   <loext:theme-colors loext:name="LibreOffice">
+    <loext:color loext:name="dark1" loext:color="#000000"/>
+    <loext:color loext:name="light1" loext:color="#ffffff"/>
+    <loext:color loext:name="dark2" loext:color="#000000"/>
+    <loext:color loext:name="light2" loext:color="#ffffff"/>
+    <loext:color loext:name="accent1" loext:color="#18a303"/>
+    <loext:color loext:name="accent2" loext:color="#0369a3"/>
+    <loext:color loext:name="accent3" loext:color="#a33e03"/>
+    <loext:color loext:name="accent4" loext:color="#8e03a3"/>
+    <loext:color loext:name="accent5" loext:color="#c99c00"/>
+    <loext:color loext:name="accent6" loext:color="#c9211e"/>
+    <loext:color loext:name="hyperlink" loext:color="#0000ee"/>
+    <loext:color loext:name="followed-hyperlink" loext:color="#551a8b"/>
+   </loext:theme-colors>
+  </loext:theme>
+ </office:styles>
+ <office:automatic-styles>
+  <style:style style:name="P1" style:family="paragraph" style:parent-style-name="Standard">
+   <style:text-properties officeooo:rsid="0009af94" officeooo:paragraph-rsid="0009af94"/>
+  </style:style>
+  <style:page-layout style:name="pm1">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm" loext:margin-gutter="0cm">
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm2" style:page-usage="left">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm" loext:margin-gutter="0cm">
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm3" style:page-usage="right">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm" loext:margin-gutter="0cm">
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm4">
+   <style:page-layout-properties fo:page-width="22.901cm" fo:page-height="11.4cm" style:num-format="1" style:print-orientation="landscape" fo:margin-top="0cm" fo:margin-bottom="0cm" fo:margin-left="0cm" fo:margin-right="0cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm" loext:margin-gutter="0cm">
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm5">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="1cm" fo:margin-bottom="1cm" fo:margin-left="2cm" fo:margin-right="1cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm" loext:margin-gutter="0cm">
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm6">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm" loext:margin-gutter="0cm">
+    <style:footnote-sep style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+  <style:page-layout style:name="pm7">
+   <style:page-layout-properties fo:page-width="29.7cm" fo:page-height="21.001cm" style:num-format="1" style:print-orientation="landscape" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:footnote-max-height="0cm" loext:margin-gutter="0cm">
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+ </office:automatic-styles>
+ <office:master-styles>
+  <style:master-page style:name="Standard" style:page-layout-name="pm1"/>
+  <style:master-page style:name="First_20_Page" style:display-name="First Page" style:page-layout-name="pm1" style:next-style-name="Standard"/>
+  <style:master-page style:name="Left_20_Page" style:display-name="Left Page" style:page-layout-name="pm2" style:next-style-name="Right_20_Page"/>
+  <style:master-page style:name="Right_20_Page" style:display-name="Right Page" style:page-layout-name="pm3" style:next-style-name="Left_20_Page"/>
+  <style:master-page style:name="Envelope" style:page-layout-name="pm4"/>
+  <style:master-page style:name="Index" style:page-layout-name="pm1"/>
+  <style:master-page style:name="HTML" style:page-layout-name="pm5"/>
+  <style:master-page style:name="Footnote" style:page-layout-name="pm6"/>
+  <style:master-page style:name="Endnote" style:page-layout-name="pm6"/>
+  <style:master-page style:name="Landscape" style:page-layout-name="pm7"/>
+ </office:master-styles>
+ <office:body>
+  <office:text>
+   <text:sequence-decls>
+    <text:sequence-decl text:display-outline-level="0" text:name="Illustration"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Table"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Text"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Drawing"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Figure"/>
+   </text:sequence-decls>
+   <text:p text:style-name="P1">This is a test document.</text:p>
+  </office:text>
+ </office:body>
+</office:document>
\ No newline at end of file
diff --git a/vcl/qa/cppunit/pdfexport/pdfexport2.cxx b/vcl/qa/cppunit/pdfexport/pdfexport2.cxx
index 3445503f6377..f883a3c97540 100644
--- a/vcl/qa/cppunit/pdfexport/pdfexport2.cxx
+++ b/vcl/qa/cppunit/pdfexport/pdfexport2.cxx
@@ -6119,6 +6119,69 @@ CPPUNIT_TEST_FIXTURE(PdfExportTest2, testTdf164106SplitReorderedClusters)
     fnCompareIndices(6, 13);
 }
 
+CPPUNIT_TEST_FIXTURE(PdfExportTest2, testPDFAttachmentsWithEncryptedFile)
+{
+    // Encrypt the document and use the hybrid mode.
+    // The original ODF document will be saved to the PDF as an attachment.
+
+    aMediaDescriptor["FilterName"] <<= OUString("writer_pdf_Export");
+    uno::Sequence<beans::PropertyValue> aFilterData
+        = { comphelper::makePropertyValue("IsAddStream", true),
+            comphelper::makePropertyValue("EncryptFile", true),
+            comphelper::makePropertyValue("DocumentOpenPassword", OUString("secret")) };
+    aMediaDescriptor["FilterData"] <<= aFilterData;
+
+    saveAsPDF(u"SimpleTestDocument.fodt");
+
+    // Parse the round-tripped document with PDFium
+    auto pPdfDocument = parsePDFExport("secret"_ostr);
+
+    // Should be 1 page
+    CPPUNIT_ASSERT_EQUAL(1, pPdfDocument->getPageCount());
+
+    // Should have 1 attachment
+    CPPUNIT_ASSERT_EQUAL(1, pPdfDocument->getAttachmentCount());
+
+    // Get the attachment
+    auto pAttachment = pPdfDocument->getAttachment(0);
+    CPPUNIT_ASSERT(pAttachment);
+
+    // Check the filename of the attachment
+    CPPUNIT_ASSERT_EQUAL(u"Original.odt"_ustr, pAttachment->getName());
+
+    // Write the attachment to the buffer
+    std::vector<sal_uInt8> aBuffer;
+    CPPUNIT_ASSERT(pAttachment->getFile(aBuffer));
+    CPPUNIT_ASSERT_GREATER(size_t(0), aBuffer.size());
+
+    // Create a temp file and store the content of the attachment
+    utl::TempFileNamed aTempFile;
+    aTempFile.EnableKillingFile();
+    {
+        SvFileStream aOutputStream(aTempFile.GetURL(), StreamMode::WRITE | StreamMode::TRUNC);
+        aOutputStream.WriteBytes(aBuffer.data(), aBuffer.size());
+    }
+
+    // Load the attached document from the temp file
+    UnoApiTest::loadFromURL(aTempFile.GetURL());
+
+    // Check the content - first paragraph
+    uno::Reference<text::XTextDocument> xTextDocument(mxComponent, uno::UNO_QUERY);
+    CPPUNIT_ASSERT(xTextDocument.is());
+    uno::Reference<container::XEnumerationAccess> xParagraphEnumAccess(xTextDocument->getText(),
+                                                                       uno::UNO_QUERY);
+    CPPUNIT_ASSERT(xParagraphEnumAccess.is());
+    uno::Reference<container::XEnumeration> xParagraphEnum
+        = xParagraphEnumAccess->createEnumeration();
+    uno::Reference<text::XTextContent> const xElement(xParagraphEnum->nextElement(),
+                                                      uno::UNO_QUERY);
+    CPPUNIT_ASSERT(xElement.is());
+    uno::Reference<text::XTextRange> const xParagraph(xElement, uno::UNO_QUERY);
+    CPPUNIT_ASSERT(xParagraph.is());
+
+    CPPUNIT_ASSERT_EQUAL(u"This is a test document."_ustr, xParagraph->getString());
+}
+
 } // end anonymous namespace
 
 CPPUNIT_PLUGIN_IMPLEMENT();
diff --git a/vcl/source/pdf/PDFiumLibrary.cxx b/vcl/source/pdf/PDFiumLibrary.cxx
index a1552e9ca1bf..3eea4a2010fc 100644
--- a/vcl/source/pdf/PDFiumLibrary.cxx
+++ b/vcl/source/pdf/PDFiumLibrary.cxx
@@ -20,6 +20,7 @@
 #include <fpdf_save.h>
 #include <fpdf_signature.h>
 #include <fpdf_formfill.h>
+#include <fpdf_attachment.h>
 
 #include <osl/endian.h>
 #include <vcl/bitmap.hxx>
@@ -489,6 +490,23 @@ public:
     FPDF_FORMHANDLE getPointer();
 };
 
+class PDFiumAttachmentImpl final : public PDFiumAttachment
+{
+private:
+    FPDF_ATTACHMENT mpAttachment;
+    PDFiumAttachmentImpl(const PDFiumSignatureImpl&) = delete;
+    PDFiumAttachmentImpl& operator=(const PDFiumSignatureImpl&) = delete;
+
+public:
+    PDFiumAttachmentImpl(FPDF_ATTACHMENT pAttachment)
+        : mpAttachment(pAttachment)
+    {
+    }
+
+    OUString getName() override;
+    bool getFile(std::vector<unsigned char>& rOutBuffer) override;
+};
+
 class PDFiumDocumentImpl : public PDFiumDocument
 {
 private:
@@ -509,11 +527,13 @@ public:
     basegfx::B2DSize getPageSize(int nIndex) override;
     int getPageCount() override;
     int getSignatureCount() override;
+    int getAttachmentCount() override;
     int getFileVersion() override;
     bool saveWithVersion(SvMemoryStream& rStream, int nFileVersion) override;
 
     std::unique_ptr<PDFiumPage> openPage(int nIndex) override;
     std::unique_ptr<PDFiumSignature> getSignature(int nIndex) override;
+    std::unique_ptr<PDFiumAttachment> getAttachment(int nIndex) override;
     std::vector<unsigned int> getTrailerEnds() override;
     OUString getBookmarks() override;
 };
@@ -742,6 +762,29 @@ util::DateTime PDFiumSignatureImpl::getTime()
     return aRet;
 }
 
+OUString PDFiumAttachmentImpl::getName()
+{
+    return getUnicodeString([this](FPDF_WCHAR* buffer, unsigned long length) {
+        return FPDFAttachment_GetName(mpAttachment, buffer, length);
+    });
+}
+
+bool PDFiumAttachmentImpl::getFile(std::vector<unsigned char>& rOutBuffer)
+{
+    rOutBuffer.clear();
+
+    unsigned long nLength{};
+    if (!FPDFAttachment_GetFile(mpAttachment, nullptr, 0, &nLength))
+        return false;
+
+    rOutBuffer.resize(nLength);
+    unsigned long nActualLength{};
+    if (!FPDFAttachment_GetFile(mpAttachment, rOutBuffer.data(), nLength, &nActualLength))
+        return false;
+    rOutBuffer.resize(nActualLength);
+    return true;
+}
+
 PDFiumDocumentImpl::PDFiumDocumentImpl(FPDF_DOCUMENT pPdfDocument)
     : mpPdfDocument(pPdfDocument)
     , m_aFormCallbacks()
@@ -782,6 +825,17 @@ std::unique_ptr<PDFiumSignature> PDFiumDocumentImpl::getSignature(int nIndex)
     return pPDFiumSignature;
 }
 
+std::unique_ptr<PDFiumAttachment> PDFiumDocumentImpl::getAttachment(int nIndex)
+{
+    std::unique_ptr<PDFiumAttachment> pPDFiumAttachment;
+    FPDF_ATTACHMENT pAttachment = FPDFDoc_GetAttachment(mpPdfDocument, nIndex);
+    if (pAttachment)
+    {
+        pPDFiumAttachment = std::make_unique<PDFiumAttachmentImpl>(pAttachment);
+    }
+    return pPDFiumAttachment;
+}
+
 std::vector<unsigned int> PDFiumDocumentImpl::getTrailerEnds()
 {
     int nNumTrailers = FPDF_GetTrailerEnds(mpPdfDocument, nullptr, 0);
@@ -855,6 +909,8 @@ int PDFiumDocumentImpl::getPageCount() { return FPDF_GetPageCount(mpPdfDocument)
 
 int PDFiumDocumentImpl::getSignatureCount() { return FPDF_GetSignatureCount(mpPdfDocument); }
 
+int PDFiumDocumentImpl::getAttachmentCount() { return FPDFDoc_GetAttachmentCount(mpPdfDocument); }
+
 int PDFiumDocumentImpl::getFileVersion()
 {
     int nFileVersion = 0;