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Delete all referenced objects deleted by libgourou during PDF DRM removal

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This commit is contained in:
Grégory Soutadé
2026-01-31 20:31:44 +01:00
parent 2387dff2cb
commit 76cab18667
1 changed files with 26 additions and 2 deletions
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28
src/libgourou.cpp
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@@ -1342,7 +1342,7 @@ namespace gourou
uPDFParser::Integer* ebxVersion;
std::vector<uPDFParser::Object*> objects = parser.objects();
std::vector<uPDFParser::Object*>::iterator it;
std::vector<uPDFParser::Object*>::iterator it, ebxIt;
std::vector<uPDFParser::Object*>::reverse_iterator rIt;
std::vector<uPDFParser::Object*> ebxObjects;
unsigned char decryptedKey[16];
@@ -1513,10 +1513,34 @@ namespace gourou
}
}
/* Delete objects that reference EBX objects, except in trailer */
for(it = objects.begin(); it != objects.end(); it++)
{
uPDFParser::Object* object = *it;
if (object->hasKey("Encrypt") && (*object)["Encrypt"]->type() == uPDFParser::DataType::REFERENCE)
{
uPDFParser::Reference* encrypt = (uPDFParser::Reference*)(*object)["Encrypt"];
/* Delete EBX objects */
for(ebxIt = ebxObjects.begin(); ebxIt != ebxObjects.end(); ebxIt++)
{
if (encrypt->value() == (*ebxIt)->objectId())
{
GOUROU_LOG(ERROR, "Delete stream id " << object->objectId());
parser.removeObject(object);
break;
}
}
}
}
/* Delete EBX objects */
for(it = ebxObjects.begin(); it != ebxObjects.end(); it++)
parser.removeObject(*it);
uPDFParser::Object& trailer = parser.getTrailer();
uPDFParser::Object& trailer = parser.getTrailer();
trailer.deleteKey("Encrypt");
parser.write(filenameOut);