Skip to content
UEFI shim loader
C C++ Other
Find file
#1 Compare This branch is 12 commits behind rhinstaller:master.
Latest commit e22a7b5 Sep 17, 2015 Linn Crosetto committed with vathpela Fix recursive reference for RELEASE
Building 0.9 with GNU Make 4.0 fails with the following error:

Makefile:4: *** Recursive variable 'RELEASE' references itself (eventually).  Stop.

Change RELEASE to simply-expanded.

Signed-off-by: Linn Crosetto <linn@hpe.com>
Failed to load latest commit information.
Cryptlib Specify the gnu89 standard Jul 28, 2015
include Fix console_print_box*() parameters. Jun 16, 2015
lib More incorrect unsigned vs signed fixups from yours truly. Jun 29, 2015
.gitignore Add ident-like blobs to shim.efi for version checking. Oct 3, 2013
COPYRIGHT Add copyright file Jul 9, 2012
Makefile Fix recursive reference for RELEASE Sep 18, 2015
MokManager.c MokManager: Nerf SHA-1 again for actual hashes and signatures. Jun 16, 2015
MokVars.txt Add support for disabling db for verification Oct 2, 2013
PasswordCrypt.c additional bounds-checking on section sizes Apr 11, 2014
PasswordCrypt.h MokManager: support Tradition DES hash Sep 26, 2013
README Replace build instructions in README with something not completely wr… Jul 21, 2014
TODO Update for Josh's changes. Oct 2, 2013
cert.S Add support for 32-bit ARM Aug 12, 2014
crypt_blowfish.c MokManager: support blowfish-based crypt() hash Sep 26, 2013
crypt_blowfish.h MokManager: support blowfish-based crypt() hash Sep 26, 2013
elf_aarch64_efi.lds Make sure our build-id notes wind up at a reasonable place. Jun 29, 2015
elf_arm_efi.lds Make sure our build-id notes wind up at a reasonable place. Jun 30, 2015
elf_ia32_efi.lds Make sure our build-id notes wind up at a reasonable place. Jun 30, 2015
elf_ia64_efi.lds Make sure our build-id notes wind up at a reasonable place. Jun 30, 2015
elf_x86_64_efi.lds Make sure our build-id notes wind up at a reasonable place. Jun 30, 2015
fallback.c Improve our debuginfo path print Jun 30, 2015
make-certs Sign MokManager with a locally-generated key Nov 26, 2012
netboot.c Correctly reject bad tftp addresses earlier, rather than later. Oct 2, 2014
netboot.h netboot.h: fix build error on 32-bit systems Nov 12, 2013
replacements.c Ensure that apps launched by shim get correct BS->Exit() behavior Jun 11, 2015
replacements.h Ensure that apps launched by shim get correct BS->Exit() behavior Jun 11, 2015
shim.c Improve our debuginfo path print Jun 30, 2015
shim.h Ensure that apps launched by shim get correct BS->Exit() behavior Jun 11, 2015
testplan.txt Another testplan error. Oct 2, 2014
ucs2.h Add StrCSpn() Apr 30, 2013
version.c.in Add ident-like blobs to shim.efi for version checking. Oct 3, 2013
version.h Add ident-like blobs to shim.efi for version checking. Oct 3, 2013

README

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_CERT_FILE=pub.cer".
Something went wrong with that request. Please try again.