README
上传用户:aoeyumen
上传日期:2007-01-06
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- This source package does two things.
- a) It contains code to perform the css authentication protocol,
- allowing locked sectors on the DVD disc to be accessed.
- This also allows us to read the disc key and title keys.
- b) It contains an implementation of the css decryption algorithm,
- so that we can watch DVD's.
- Also included are some test programs to wrarp around the above code
- blocks so that something usefule can be performed.
- The programs included are tstdvd, reset, dvdinfo and css-cat.
- tstdvd can be used to unlock the disc (saving the disk key) and
- to extract the title keys. usage is:
- reset /path/to/dvd/device
- This will reset all AGIDs that the drive has given out. This
- can sometimes be useful when something goes wrong.
- tstdvd /path/to/dvd/device
- This will authenticate the device and save the disk key into
- a file in the current directory called "disk-key".
- (mount the dvd somewhere)
- tstdvd /path/to/dvd/device /mount/path/video_ts/vts_01_1.vob
- This will reauthenticate and then read the title key for
- the chosen vob file, saving it in a file in the current
- directoy called "title-key".
- Do the above title key extraction for each title on the disc,
- renaming the title-key files to title1-key, title2-key etc.
- dvdinfo /path/to/dvd/device
- Displays some info from the physical and copyright pages. This
- includes the region limits on the disc, its encryption status,
- and the authentication status.
- css-cat [-t title-no] [-m mpeg-audio-no ] [-vPpm12345678] vob_file
- This will decrypt the selected vob file and send to stdout. It
- needs the files "disk-key" and "titleX-key" to be in the current
- directory. The default title-no is one, so by default it will look
- for "title1-key".
- The options select what will be sent to stdout. By default, nothing
- will. The m option is not yet coded, the v option selects video, the
- numbers select the appropriate AC3 stream.
- It will normally extract the selected stream from the enclosing
- Program stream, thus giving an elemental stream. However if the K option
- (or more than one stream) is selected then the data will be left inside
- the PES packets, allowing a subsequent demux program to determine the
- data type.
- I tend to use:
- cat /dvd/video_ts/vts_01_[1-9].vob|css-cat -v1P -|mpeg2player -vob -f -
- NOTE: To use the above you need to have a kernel which incorporates the
- DVD ioctls. This can either be the original patch by Andrew Veliath
- or Jens Axboe's patches. If using Andrews versio of the patches,
- you'll have to change the use of .key in the sources to .key1/.key2
- (the places are quite easy to find).
- Jens site is www.kernel.dk
- Changes:
- Patches have been applied to use the OpenBSD headers, so maybe it'll
- work.
- There a some more keys included. It should now be able to decrypt
- all titles currently on the market. I think the last two keys can
- be removed. Someone with 'The Matrix' please test and get back to
- me.
- Mpeg audio streams should now be extractable when filtering, this is
- untested.
- It now copes with System headers in the Pack layer (those 0x000001bb
- start codes).
- The command line options have changed between the last version and
- this one - pay attention.