Yang

> > > Thanks @zombie110year . One interesting aspect of the pdf is its creator/producer field: > > ``` > Creator: ReaderEx_DIS_C 2.1.0 Build 3968 > Producer: CNKI®ReaderEx(2.1.0 Build 3968)...

> The bigger one, "《周礼》中所见天神祭祀考论_刘涛.caj" converts just fine on linux, and should have worked on windows too. We just did not expect mac OS users. Anyway, I'll comment on [sainnhe/caj2pdf-qt#7](https://github.com/sainnhe/caj2pdf-qt/issues/7)...

+ CAJ格式是一种不规范的文件格式，以*.caj为扩展名的文件其实有6种，包括@Jezil 已经搞定的变形PDF（只保留了常规PDF的页对象），还有NH格式，以上两种用在硕博学位论文，偶见*.NH用于杂志。KDH格式用在杂志上，多出现在有一定年代的杂志。新版本的杂志一般就是PDF文件，只不过以*.pdf为扩展名。 + 最后，还有一种畸形PDF格式，我见过2个样本，可以正常用CAJVIEWER打开，却无法用常规PDF阅读器阅读，打开是一页空白页。这种常常以*.caj出现。 + TEB样本至今没有见过，但是根据官方说法，现在这种格式和CAA一样，作为解决方案提供给第三方厂商用作电子书版权保护，好像已经用在了QQ电子书上（结论不确切）。这种文件也不会以*.CAJ命名。

样本附上。4~8页到了文档最后。 [Specimen.zip](https://github.com/JeziL/caj2pdf/files/3992177/Specimen.zip)

Identical dialog is shown when opening 1.teb & 6.teb on Windows.  The mechanism is a standard DRM procedure, the decryption algorithm is in libreadex, therefore we need just a...

Well, let's articulate the issue here: The peoblem here is: we have an encrypted file that we wanna decrpt, and we know that the decrypted file can be either pdf...

The patent submitted by CNKI mentioned the teb format was encrypted from PDF, sometimes NH file. https://patents.google.com/patent/CN104866983A/zh

> > > It says "Status: Pending", and has been pending since 2015? That probably means nobody care enough about it either way... You are right. But we did get...

过来装一B，求支持10G宽带，我家直接连上了电信联通铁通多线接入，万兆光纤~~~

建议今后只放出源码，不再放出Binary，可以大幅度减少翻车