exiledkingcc

PR #749 can NOT deal with that, this encryption algorithm is defined by PDF 2.0 specification, but i can't find the specification document, so i left it unimplemented in PR...

a good fix!

the PDF standard says: > The calculation of the file identifier need not be reproducible; all that matters is that the identifier is likely to be unique. For example, two...

first of all, it cost too much for big pdf files. and for aes encrypted pdf, it's not deterministic. when `PdfWriter.encrypt` called, the identifiers are genearated by **uncrypted** pdf stream,...

@MartinThoma this was fixed by #749

@MartinThoma this can be closed, it was fixed by #1015