I have an file which has been encrypted by Zed!. This is identified by
file --mime-type test.zed
as "application/CDFV2-encrypted"
However, when using python and the module filemagic:
with magic.Magic(flags=magic.MAGIC_MIME_TYPE) as m:
mime = m.id_buffer(file)
the exact same file is identified as: "application/cdfv2"
They both use libmagic, so I was sure that I would get the same type in both cases. However, according to this; the file command searches for
a user stream in the CDF file called "EncryptedPackage"
which apparently gives the suffix "-encrypted".
Now for my questions:
- How does one define "user stream"?
- Can I perform the check by examining the binary file in python?
- Is there any other python module which can provide information regarding if the file is encrypted or not?
I am using filemagic 1.6 and libmagic 5.22
