iBoot64helper is now an IDA loader!
Just copy iBoot64helper.py to your ~/.idapro/loaders/ (or your IDA/loaders/) directory, launch IDA, and open a decrypted iBoot, iBEC, or SecureROM binary image.
This aims to become an IDAPython utility to help with iBoot and SecureROM reverse engineering. Currently it a) locates the image's proper loading address, b) rebases the image, c) identifies functions based on common AArch64 function prologues, and d) finds and renames some interesting functions.
As you can see in the screenshot below, 1920 functions are recognized after running it on iBoot version 5540.0.129.
I will be adding features to it, identifying more functions, etc.
iBoot64helper now supports IDA 7.5 and lower versions (only tested with IDA's builtin IDAPython for Python 3).
For decrypting images you should use xerub's img4lib; the ultimate IMG4 utility.
If you have a device vulnerable to axi0mX's checkm8,
you can use
./ipwndfu --dump-rom to get a dump of the SecureROM image from your device
and use it with iBoot64helper.