Bootloaders¶

Introduction¶

In order to run free software bootloaders, we need the ability to run the code we want at boot.

However in most smartphones and many tablets use code signature at boot, which prevent us to run free software bootloader.

• Some system on a chip either don't implement code signature or the implementation is not used or tested.
• For some other system on a chip, it's up to the device vendor to choose to implement code signature or not.
• For some system on a chip, we don't know any devices not enforcing code signature, but we don't know who decided to enforce the code signature.

Devices configurations¶

• Openmoko GTA01 and GTA02: cannot run Replicant (only has 128M of RAM, armv4t).
• Many single board computers: They are not very practical to use as a smartphone or tablet, though they could be added along the way to Replicant 9 if there is some interest
• Older PDA like the OMAP4 Blaze: Check if they can easily be found: they were very expensive. Also check the upstream status. See TargetsEvaluation for such devices.

• Optimus 3D: There is probably a leaked key for signing the bootloader
• FindDevicesWithUnsignedBootloaedrs: Project to find devices with free software bootloader at a very large scale

System on a chip¶

Tools¶

Some of the tools below can also be used to find devices that don't have restricted boot.

Links to cathegorize:¶

• https://www.theiphonewiki.com/ has a list of Bootrom security issues for apple devices.
• Ti Nspire ? RSA exponent issues?

• Upstream