mirror of
https://git.proxmox.com/git/efi-boot-shim
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79cdb2a215
This commit fixes 2 issues with the TPM support code: 1) Remove "REQUIRE_TPM ?=" line from the Makefile, further down the Makefile checks if REQUIRE_TPM is undefined, but the above line sets it to an empty string, which is not the same as undefined. Without this handle_image fails after the tpm_log_pe() call even if REQUIRE_TPM=1 once was not set when building the shim 2) When secure-boot is disabled then shim_verify() would exit with the status of tpm_log_pe(), which on systems with a TPM is an error. Combined with the recent change to always install the shim protocols, this causes grub to refuse to boot any kernel since the verify() call now always fails. This commit fixes this by explicitly setting status = EFI_SUCCESS when secure-boot is disabled. Signed-off-by: Hans de Goede <hdegoede@redhat.com> |
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|---|---|---|
| Cryptlib | ||
| include | ||
| lib | ||
| .gitignore | ||
| .syntastic_c_config | ||
| buildid.c | ||
| BUILDING | ||
| cert.S | ||
| COPYRIGHT | ||
| crypt_blowfish.c | ||
| crypt_blowfish.h | ||
| elf_aarch64_efi.lds | ||
| elf_arm_efi.lds | ||
| elf_ia32_efi.lds | ||
| elf_ia64_efi.lds | ||
| elf_x86_64_efi.lds | ||
| errlog.c | ||
| fallback.c | ||
| hexdump.h | ||
| httpboot.c | ||
| httpboot.h | ||
| make-certs | ||
| Makefile | ||
| MokManager.c | ||
| MokVars.txt | ||
| netboot.c | ||
| netboot.h | ||
| PasswordCrypt.c | ||
| PasswordCrypt.h | ||
| README | ||
| README.fallback | ||
| README.tpm | ||
| replacements.c | ||
| replacements.h | ||
| shim.c | ||
| shim.h | ||
| testplan.txt | ||
| TODO | ||
| tpm.c | ||
| tpm.h | ||
| ucs2.h | ||
| version.c.in | ||
| version.h | ||
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. On systems with a TPM chip enabled and supported by the system firmware, shim will extend various PCRs with the digests of the targets it is loading. A full list is in the file README.tpm . 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". There are a couple of build options, and a couple of ways to customize the build, described in BUILDING.