shim is a trivial EFI application that, when run, attempts to open and
execute another application.
shim is a trivial EFI application that, when run, attempts to open and
execute another application. It will initially attempt to do this via the
standard EFI LoadImage() and StartImage() calls. If these fail (because secure
boot is enabled and the binary is not signed with an appropriate key, for
instance) it will then validate the binary against a built-in certificate. If
this succeeds and if the binary or signing key are not blacklisted then shim
will relocate and execute the binary.
shim will also install a protocol which permits the second-stage bootloader
to perform similar binary validation. This protocol has a GUID as described
in the shim.h header file and provides a single entry point. On 64-bit systems
this entry point expects to be called with SysV ABI rather than MSABI, and
so calls to it should not be wrapped.
To use shim, simply place a DER-encoded public certificate in a file such as
pub.cer and build with "make VENDOR_
Project information
- Maintainer:
- Brian Murray
- Driver:
- Mathieu Trudel-Lapierre
- Licence:
- Simplified BSD Licence
View full history Series and milestones
trunk series is the current focus of development.
All packages Packages in Distributions
-
shim-signed source package in Xenial
Version 1.33.1~16.04.10 uploaded -
shim-signed source package in Trusty
Version 1.33.1~14.04.5 uploaded -
shim-signed source package in Precise
Version 1.18~12.04.1 uploaded -
shim-signed source package in Oracular
Version 1.58 uploaded -
shim-signed source package in Noble
Version 1.58 uploaded
More contributors Top contributors
- dann frazier 4 points