diff options
Diffstat (limited to 'libqpdf/QPDF_encryption.cc')
| -rw-r--r-- | libqpdf/QPDF_encryption.cc | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/libqpdf/QPDF_encryption.cc b/libqpdf/QPDF_encryption.cc index 51ed3072..88cd707f 100644 --- a/libqpdf/QPDF_encryption.cc +++ b/libqpdf/QPDF_encryption.cc @@ -791,17 +791,24 @@ QPDF::initializeEncryption() // encryption dictionary. this->encrypted = true; + std::string id1; QPDFObjectHandle id_obj = this->trailer.getKey("/ID"); - if (! (id_obj.isArray() && - (id_obj.getArrayNItems() == 2) && - id_obj.getArrayItem(0).isString())) + if ((id_obj.isArray() && + (id_obj.getArrayNItems() == 2) && + id_obj.getArrayItem(0).isString())) { - throw QPDFExc(qpdf_e_damaged_pdf, this->file->getName(), - "trailer", this->file->getLastOffset(), - "invalid /ID in trailer dictionary"); + id1 = id_obj.getArrayItem(0).getStringValue(); + } + else + { + // Treating a missing ID as the empty string enables qpdf to + // decrypt some invalid encrypted files with no /ID that + // poppler can read but Adobe Reader can't. + warn(QPDFExc(qpdf_e_damaged_pdf, this->file->getName(), + "trailer", this->file->getLastOffset(), + "invalid /ID in trailer dictionary")); } - std::string id1 = id_obj.getArrayItem(0).getStringValue(); QPDFObjectHandle encryption_dict = this->trailer.getKey("/Encrypt"); if (! encryption_dict.isDictionary()) { |