diff options
Diffstat (limited to 'libqpdf/QPDFWriter.cc')
| -rw-r--r-- | libqpdf/QPDFWriter.cc | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/libqpdf/QPDFWriter.cc b/libqpdf/QPDFWriter.cc index dde6e559..8d169f3b 100644 --- a/libqpdf/QPDFWriter.cc +++ b/libqpdf/QPDFWriter.cc @@ -726,8 +726,12 @@ QPDFWriter::setEncryptionParametersInternal( std::string method = (this->encrypt_use_aes ? ((V < 5) ? "/AESV2" : "/AESV3") : "/V2"); + // The PDF spec says the /Length key is optional, but the PDF + // previewer on some versions of MacOS won't open encrypted + // files without it. encryption_dictionary["/CF"] = - "<< /StdCF << /AuthEvent /DocOpen /CFM " + method + " >> >>"; + "<< /StdCF << /AuthEvent /DocOpen /CFM " + method + + " /Length " + std::string((V < 5) ? "16" : "32") + " >> >>"; } this->encrypted = true; |