Odin uses a .tar.md5 format which is actually a concatenated tar and .md5 file.
To convert boot.img to Odin flashable:
tar -H ustar -cvvf boot.tar boot.img
The -H option may be substituted with –format
This creates a file boot.tar in ustar format.
Now we append the md5 to the same file
md5sum boot.tar >> boot.tar
We now rename the file to .tar.md5
mv boot.tar boot.tar.md5
To extract and convert this back to a Recovery flashable format, we do
tar -xvvf boot.tar.md5
If you need to read the md5, you can use the following command:
tail -1 boot.tar.md5 | cut -d\ -f1
which reads the last byte of the file boot.tar.md5 which is the md5sum integer plus the filename seperated by a space, then “cuts” it by the delimitor of space, and shows the first characters before the delimitor.
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