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UEFI shim loader

Add nostdinc to the CFLAGS for lib

We don't need the headers from the standard include path.

Signed-off-by: Gary Ching-Pang Lin <>
latest commit 361716dd4a
Gary Ching-Pang Lin lcp authored vathpela committed
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Cryptlib Cryptlib: remove the unused files
include Make sure we don't try to load a binary from a different arch.
lib Add nostdinc to the CFLAGS for lib
.gitignore Add ident-like blobs to shim.efi for version checking.
COPYRIGHT Add copyright file
Makefile Bump version to 0.8
MokManager.c Make another integer compare be signed/unsigned safe as well.
MokVars.txt Add support for disabling db for verification
PasswordCrypt.c additional bounds-checking on section sizes
PasswordCrypt.h MokManager: support Tradition DES hash
README Replace build instructions in README with something not completely wr…
TODO Update for Josh's changes.
cert.S Add support for 32-bit ARM
crypt_blowfish.c MokManager: support blowfish-based crypt() hash
crypt_blowfish.h MokManager: support blowfish-based crypt() hash Add support for 64-bit ARM (AArch64) Fix typo from Ard's old tree 32-bit ARM patch. Revert header changes Move embedded certificates to their own section. Revert header changes
fallback.c [fallback] Try to boot the first boot option anyway
make-certs Sign MokManager with a locally-generated key
netboot.c Correctly reject bad tftp addresses earlier, rather than later.
netboot.h netboot.h: fix build error on 32-bit systems
replacements.c Don't name something exit().
replacements.h Allow fallback to use the system's LoadImage/StartImage .
shim.c Don't verify images with the empty build key
shim.h Make SHIM_LOCK_GUID a first-class object with a symbol.
testplan.txt Another testplan error.
ucs2.h Add StrCSpn() Add ident-like blobs to shim.efi for version checking.
version.h Add ident-like blobs to shim.efi for version checking.


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".
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