2008-07-11 16:51:25 +00:00
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zenutils is a collection of utilities for working with firmwares of the Creative Zen range.
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The utilities are split into 3 categories:
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1) update_*
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Operates on the Creative firmware updater executable.
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2) firmware_*
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Operates on the Creative firmware archive.
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3) zen_crypt
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Operates on the parts of the firmware archive which requires cryptography.
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General usage:
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--------------
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A typical use scenario would be: download the firmware updater and run
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update_extract on it to obtain the firmware archive which it contains.
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Run firmware_extract on the firmware archive to obtain the files
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which the firmware archive contains and a make file that can later be used
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to create a new firmware archive. Edit* the extracted files of
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interest and optionally the associated make file. Create a new firmware
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archive by running firmware_make. If a NULL entry is present in the firmware
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then it's signature has to be updated running zen_crypt. If on windows, you
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can use update_patch to write your newly created firmware archive to the
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updater executable which you originally extracted it from. The new updater
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will update your player with the modifications you've made.
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* If you're creating or editing executable code, such as the CENC or <20>TL entries,
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you'll need to use zen_crypt to decrypt and/or encrypt them.
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In addition, executable code on some players that use the <20>TL entries also needs
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to be signed using zen_crypt, prior to encrypting them.
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Encrypting FBOOT and FRESC is not supported, as these contain the executable
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code that makes up the critical Rescue Mode software, contained in flash.
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As opposed to CENC and <20>TL which ultimately ends up being stored in the players
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filesystem as a file named Jukebox2.jrm.
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Important:
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----------
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The only entries required in a firmware archive is CINF and if present, NULL.
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Including either FBOOT, FRESC or EXT0 in your firmware archive is not advised,
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the first two are required for the Rescue Mode software operation and EXT0 is
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unknown, but given that it's contents is sent to an internal device named mcu0,
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the consequences of failure could be fatal to your player.
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Supported players:
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------------------
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zen_crypt supports signing, verification, decryption and encryption on the
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following Creative Zen players:
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Vision:M (default if no player is specified)
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Vision W
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Micro
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MicroPhoto
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Sleek
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SleekPhoto
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Touch
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Xtra
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The other utilities are not player specific and may work on players not listed.
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Although the Vision:M is the only player I've fully tested.
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Building the sources:
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---------------------
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The source code uses the CMake (www.cmake.org) build system.
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Once you've installed CMake, you'll need to run it to produce make files for
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your system. I would recommend producing the make files within in the 'build'
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directory of this package. Which can be done by typing:
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zenutils\build\>cmake -g "Visual Studio 8 2005" ..
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(for msvc8 on windows)
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or:
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~zenutils/build/$ cmake -g "Unix Makefiles" ..
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(for various 'nixes)
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The windows example will produce a solution file for msvc8.
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The 'nix example will produce a makefile which can be built using make.
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The executables will be placed within the 'bin' directory, once built.
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