VLC player

[I-III-I]

Maybe it is worth to mention that VLC player can read the
video from stdin and therefore can be used to directly play
encrypted videos without the need to first store an unencrypted
version of the video on the disk.

Here a small utility to do the en-/decryption for VLC.
Download it (source included) from:

http://onlib.de/pub/pfv/pfv.zip

or execute the batch code at the end of this posting to generate
the executable pfv.exe.

There is also a demo file:

http://onlib.de/pub/pfv/demo.pfv  (33 MByte)

with a few small, encrypted videos embedded. 

http://onlib.de/pub/pfv/demo.mp4  (33 MByte)

contains the same videos as demo.pfv but the first one
is not encrypted, so it can be played by just clicking
the link.


--------------------------------------------------------------

Here the readme.txt:



Privacy For Videos (aes256 encryption for videos)

This utility can be use to display encrypted videos in
combination with the VLC media player:

usage: pfv.exe number : password1 : password2 : inputfile >outputfile

password is a 43 character string with the characters A-Z a-z 0-9 / +
Any other character is ignored. If less characters are provided, the
string is padded with +. Therefore you should not use a password which
ends with a +, because, for example, the two passwords "abc" and "abc++++"
are both extended to "abc++++++++++++++++++++++++++++++++++++++++"
and therefore "abc++++" is not more secure than "abc". The binary
256 bit key for aes is generated by base64 decoding the given 43
character password.

To encrypt a video file "video1.mp4" with the password "hello world"
(note: the space in the password is ignored, so "helloworld" or
"hello_world" would be the same), use:

pfv.exe :: hello world : video1.mp4 >video1.pfv

The file size of the output file is increased to a multiple
of 1 MByte.

Note: if you repeat this command, you will get a different
binary, but it still is a valid encrypted version of the video.


To decrypt this encrypted video use:

pfv.exe : hello world :: video1.pfv >video2.mp4

video1.mp4 and video2.mp4 are then identical files.


To directly play an encrypted video use:

pfv.exe : hello world :: video1.pfv | C:\path_to_vlc\vlc.exe -


To re-encrypt a video with a different password without first
decrypting it (no decrypted version of the video is temporarily
stored on the disk), use:

pfv.exe : old password : new password : inputfile > outputfile


If you have more encrypted videos, for example:

video1.pfv (encrypted with password "pass1")
video2.pfv (encrypted with password "pass1")
video3.pfv (encrypted with password "pass2")
video4.pfv (encrypted with password "pass1")

you can copy them all into one big file (but there
is a 4 GByte limit for FAT filesystems):

copy /b video1.pfv + video2.pfv + video3.pfv + video4.pfv all.pfv

To play vidoe1 use:
pfv.exe : pass1 :: all.pfv | C:\path_to_vlc\vlc.exe -

To play vidoe2 use:
pfv.exe 2 : pass1 :: all.pfv | C:\path_to_vlc\vlc.exe -

To play vidoe3 use:
pfv.exe : pass2 :: all.pfv | C:\path_to_vlc\vlc.exe -

To play vidoe4 use:
pfv.exe 3 : pass1 :: all.pfv | C:\path_to_vlc\vlc.exe -

The number specifies which of the videos encrypted with 
the given password should be decrypted. If the number
is 0 or omitted, 1 is used (video4 is the 3. video 
encrypted with pass1 in the input file).

If you use ">outfile" instead of "|vlc -" you can 
extract the video from the multi-video file (encrypted
or unencrypted depending on a given second password).

The program is pretty slow, but a standard PC should be
be able to decode at least Full HD videos.



If you put this batch on your desktop,

@echo off
set /p p=Password: 
set p=&cls&pfv :%p%::%1|C:\path_to_vlc\vlc.exe -

you can use the mouse to drop a encrypted video on it.
It then asks for the password and plays the video.


If you use multi video files, use this batch:

@echo off
set /p p=Number:Password: 
set p=&cls&pfv %p%::%1|D:\Programme\vlc\vlc.exe -

In this case you must enter the number and password
separated by a ":", for example: 3:mypassword

--------------------------------------------------------------------

The demo file demo.pfv contains 3 videos and a zip file:

video 1:  a cat video
          password "only cats no dogs"
video 2:  a qr code video 
          password "hack me if you can"
video 3:  a picture slide show video 
          password again "only cats no dogs"
zip file: a zip file with some original pictures of the slide show
          password  "who cares"

to play video 1 use:
pfv :only cats no dogs::demo.pfv| C:\path_to_vlc\vlc.exe -

to play video 2 use:
pfv :hack me if you can::demo.pfv| C:\path_to_vlc\vlc.exe -

to play video 3 use:
pfv 2:only cats no dogs::demo.pfv| C:\path_to_vlc\vlc.exe -

to extract the zip file use:
pfv :who cares::demo.pfv > cats.zip

If you decode the qr code video, you will get a zip file
with some pictures. The password for the pictures is:
"The quick brown fox jump"

--------------------------------------------------------------------

Here the binary of pfv.exe (just execute the batch below to
generate the binary):

@echo off
certutil -f -decode %~f0 pfv.exe>nul
goto :eof

-----BEGIN CERTIFICATE-----
TVpgAQEAAAAEAAAA//8AAGABAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAoAAAAA4fug4AtAnNIbgBTM0hTmljZSB0byBtZWV0IHNvbWVi
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dWlyZXMgV2luMzIuDQokAFBFAABMAQEAUHmlNgAAAAAAAAAA4AAPAQsBBQwADAAA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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
-----END CERTIFICATE-----