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Signature plugin: invisible digital signature

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This commit is contained in:
Jakub Melka
2022-05-28 19:42:52 +02:00
parent 3d6954dc41
commit c7e7b76e5b
7 changed files with 497 additions and 120 deletions
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79
Pdf4QtLib/sources/pdfdocumentbuilder.cpp
View File

@@ -4567,6 +4567,37 @@ PDFObjectReference PDFDocumentBuilder::createFormFieldSignature(QString fieldNam
}
void PDFDocumentBuilder::createInvisibleFormFieldWidget(PDFObjectReference formField,
PDFObjectReference page)
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("P");
objectBuilder << page;
objectBuilder.endDictionaryItem();
objectBuilder.beginDictionaryItem("Rect");
objectBuilder << std::array{ 0.0, 0.0, 0.0, 0.0 };
objectBuilder.endDictionaryItem();
objectBuilder.beginDictionaryItem("Subtype");
objectBuilder << WrapName("Widget");
objectBuilder.endDictionaryItem();
objectBuilder.beginDictionaryItem("Type");
objectBuilder << WrapName("Annot");
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject widgetObject = objectBuilder.takeObject();
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("Annots");
objectBuilder << std::array{ formField };
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject pageObject = objectBuilder.takeObject();
mergeTo(formField, widgetObject);
appendTo(page, pageObject);
}
PDFObjectReference PDFDocumentBuilder::createSignatureDictionary(QByteArray filter,
QByteArray subfilter,
QByteArray contents,
@@ -4589,7 +4620,7 @@ PDFObjectReference PDFDocumentBuilder::createSignatureDictionary(QByteArray filt
objectBuilder << std::array{ byteRangeItem, byteRangeItem, byteRangeItem, byteRangeItem };
objectBuilder.endDictionaryItem();
objectBuilder.beginDictionaryItem("Contents");
objectBuilder << contents;
objectBuilder << WrapString(contents);
objectBuilder.endDictionaryItem();
objectBuilder.beginDictionaryItem("M");
objectBuilder << signingTime;
@@ -5100,14 +5131,6 @@ void PDFDocumentBuilder::setFormFieldValue(PDFObjectReference formField,
}
void PDFDocumentBuilder::setLanguage(QLocale locale)
{
PDFObjectFactory objectBuilder;
setLanguage(locale.name());
}
void PDFDocumentBuilder::setLanguage(QString language)
{
PDFObjectFactory objectBuilder;
@@ -5122,6 +5145,14 @@ void PDFDocumentBuilder::setLanguage(QString language)
}
void PDFDocumentBuilder::setLanguage(QLocale locale)
{
PDFObjectFactory objectBuilder;
setLanguage(locale.name());
}
void PDFDocumentBuilder::setOutline(PDFObjectReference outline)
{
PDFObjectFactory objectBuilder;
@@ -5256,6 +5287,36 @@ void PDFDocumentBuilder::setPageUserUnit(PDFObjectReference page,
}
void PDFDocumentBuilder::setSignatureContactInfo(PDFObjectReference signatureDictionary,
QString contactInfoText)
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("ContactInfo");
objectBuilder << contactInfoText;
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject updatedSignatureDictionary = objectBuilder.takeObject();
mergeTo(signatureDictionary, updatedSignatureDictionary);
}
void PDFDocumentBuilder::setSignatureReason(PDFObjectReference signatureDictionary,
QString reasonText)
{
PDFObjectFactory objectBuilder;
objectBuilder.beginDictionary();
objectBuilder.beginDictionaryItem("Reason");
objectBuilder << reasonText;
objectBuilder.endDictionaryItem();
objectBuilder.endDictionary();
PDFObject updatedSignatureDictionary = objectBuilder.takeObject();
mergeTo(signatureDictionary, updatedSignatureDictionary);
}
void PDFDocumentBuilder::updateTrailerDictionary(PDFInteger objectCount)
{
PDFObjectFactory objectBuilder;

31
Pdf4QtLib/sources/pdfdocumentbuilder.h
View File

@@ -1235,6 +1235,13 @@ public:
PDFObjectReference signatureValue);
///
/// \param formField Form field reference
/// \param page Page reference
void createInvisibleFormFieldWidget(PDFObjectReference formField,
PDFObjectReference page);
/// Creates signature dictionary used for preparation in signing process. Can define parameters of the
/// signature.
/// \param filter Filter (for example, Adobe.PPKLite, Entrust.PPKEF, CiCi.SignIt, ...)
@@ -1450,11 +1457,6 @@ public:
PDFObject value);
/// Set document language.
/// \param locale Locale, from which is language determined
void setLanguage(QLocale locale);
/// Set document language.
/// \param language Document language. It should be a language identifier, as defined in ISO 639
/// and ISO 3166. For example, "en-US", where first two letter means language code (en =
@@ -1462,6 +1464,11 @@ public:
void setLanguage(QString language);
/// Set document language.
/// \param locale Locale, from which is language determined
void setLanguage(QLocale locale);
/// Set document outline.
/// \param outline Document outline root
void setOutline(PDFObjectReference outline);
@@ -1527,6 +1534,20 @@ public:
PDFReal unit);
/// Sets signature contact info field.
/// \param signatureDictionary Signature dictionary reference
/// \param contactInfoText Contact info text
void setSignatureContactInfo(PDFObjectReference signatureDictionary,
QString contactInfoText);
/// Sets signature reason field.
/// \param signatureDictionary Signature dictionary reference
/// \param reasonText Reason text
void setSignatureReason(PDFObjectReference signatureDictionary,
QString reasonText);
/// This function is used to update trailer dictionary. Must be called each time the final document is
/// being built.
/// \param objectCount Number of objects (including empty ones)