Hi there, people.
Been trying to mod a default firmware just because if its splash screen logo, which is incredibly bright and almost blinds me everytime I turn it on at night.
I have tried to use the Firmware Mod Kit to extract the firmware from the binary file.
Instead of coming across a squash or cram filesystem, I ended up with some zip compressed files. Here's some output:
If I unzip the binary file, I can get FMK to extract the only file I'd really like to change: logo-x.cramfs.img:
king@castle:~/fmk$ ./extract-firmware.sh logo-x.cramfs.img
Now I'm not sure how to proceed. build-firmware script won't mount it back to an .img file, and even if it does, I can't repack the initial binary as well because I had to manually extract it instead of doing via extract-firmware script.
Thoughts? I don't really want to brick my dvr, almost giving this up. Any helpful comments are largely appreciated.
Peace
Been trying to mod a default firmware just because if its splash screen logo, which is incredibly bright and almost blinds me everytime I turn it on at night.
I have tried to use the Firmware Mod Kit to extract the firmware from the binary file.
Instead of coming across a squash or cram filesystem, I ended up with some zip compressed files. Here's some output:
Code:
Scan Time: 2015-08-17 23:28:44
Signatures: 193
Target File: /home/king/fmk/myfirmware.bin
MD5 Checksum: [omitted]
DECIMAL HEX DESCRIPTION
-------------------------------------------------------------------------------------------------------
0 0x0 Zip archive data, at least v2.0 to extract, compressed size: 2118527, uncompressed size: 2154560, name: "custom-x.cramfs.img"
2118597 0x2053C5 Zip archive data, at least v2.0 to extract, compressed size: 2928495, uncompressed size: 2932800, name: "user-x.cramfs.img"
5047160 0x4D0378 Zip archive data, at least v2.0 to extract, compressed size: 2424987, uncompressed size: 2445376, name: "romfs-x.cramfs.img"
7472216 0x720458 Zip archive data, at least v2.0 to extract, compressed size: 18725, uncompressed size: 20544, name: "logo-x.cramfs.img"
7491009 0x724DC1 Zip archive data, at least v2.0 to extract, compressed size: 141, uncompressed size: 354, name: "InstallDesc"
7491611 0x72501B End of Zip archive
Extracting 0 bytes of zip header image at offset 0
ERROR: No supported file system found! Aborting...If I unzip the binary file, I can get FMK to extract the only file I'd really like to change: logo-x.cramfs.img:
king@castle:~/fmk$ ./extract-firmware.sh logo-x.cramfs.img
Code:
Firmware Mod Kit (extract) 0.99, (c)2011-2013 Craig Heffner, Jeremy Collake
Preparing tools ...
Scanning firmware...
Scan Time: 2015-08-18 00:19:50
Signatures: 193
Target File: /home/king/fmk/logo-x.cramfs.img
MD5 Checksum: 7bdcd6c61944be8860b70f9f796b3fb7
DECIMAL HEX DESCRIPTION
-------------------------------------------------------------------------------------------------------
0 0x0 uImage header, header size: 64 bytes, header CRC: 0x94AD77F7, created: Sun May 26 23:46:43 2013, image size: 20480 bytes, Data Address: 0x10770000, Entry Point: 0x10780000, data CRC: 0x8EDB113D, OS: Linux, CPU: ARM, image type: Standalone Program, compression type: gzip, image name: "linux"
64 0x40 CramFS filesystem, little endian size 20480 version #2 sorted_dirs CRC 0xbda508c, edition 0, 5 blocks, 2 files
Extracting 64 bytes of uimage header image at offset 0
Extracting cramfs file system at offset 64
Extracting CramFS file system...Now I'm not sure how to proceed. build-firmware script won't mount it back to an .img file, and even if it does, I can't repack the initial binary as well because I had to manually extract it instead of doing via extract-firmware script.
Thoughts? I don't really want to brick my dvr, almost giving this up. Any helpful comments are largely appreciated.
Peace
