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PHP script to find magic blocks in random binary data (like router firmware updates)
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PHP script to find magic blocks in random binary data (like router firmware updates)
http://servotron.accs.wayne.edu/~rob/findmagic.php
Here is a PHP script I wrote to find magic blocks in binary images. It was written with the idea of finding ext2, cramfs, romfs or other filesystems in binary firmware files from router manufacturers like netgear, d-link and linksys. It should work for any file distributed as a firmware or flash update to any x86 and or UNIX variant embedded system that linux can at least "see" or deal with. It can also find things like embedded bios code etc.. These firmware files usually have proprietary headers and other junk intermixed within them, making them such that they cannot be directly mounted with the 'mount' command. The script uses the linux/Solaris "file" command to examine every x block of data in the image. It can take a while to run depending on the block size you use and the size of the image, but is an effective way to find the starting addresses for these images so that they can be extracted from the flash image and potentially mounted. It is probably best to redirect the output to a text file to examine the results after the script is done executing.
PHP > Scripts and Programs > Development Tools > Utilities
Oct 13, 2006
Robert Thompson
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