The following variable is exported as UEFI specification defines: SignatureSupport: array of GUIDs representing the type of signatures supported by the platform firmware
Signed-off-by: AKASHI Takahiro takahiro.akashi@linaro.org --- lib/efi_loader/efi_setup.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+)
diff --git a/lib/efi_loader/efi_setup.c b/lib/efi_loader/efi_setup.c index de7b616c6daa..50cef1b4dfde 100644 --- a/lib/efi_loader/efi_setup.c +++ b/lib/efi_loader/efi_setup.c @@ -82,6 +82,39 @@ out: return ret; }
+#ifdef CONFIG_EFI_SECURE_BOOT +/** + * efi_init_secure_boot - initialize secure boot state + * + * Return: EFI_SUCCESS on success, status code (negative) on error + */ +static efi_status_t efi_init_secure_boot(void) +{ + efi_guid_t signature_types[] = { + EFI_CERT_SHA256_GUID, + EFI_CERT_X509_GUID, + }; + efi_status_t ret; + + /* TODO: read-only */ + ret = EFI_CALL(efi_set_variable(L"SignatureSupport", + &efi_global_variable_guid, + EFI_VARIABLE_BOOTSERVICE_ACCESS + | EFI_VARIABLE_RUNTIME_ACCESS, + sizeof(signature_types), + &signature_types)); + if (ret != EFI_SUCCESS) + printf("EFI: cannot initialize SignatureSupport variable\n"); + + return ret; +} +#else +static efi_status_t efi_init_secure_boot(void) +{ + return EFI_SUCCESS; +} +#endif /* CONFIG_EFI_SECURE_BOOT */ + /** * efi_init_obj_list() - Initialize and populate EFI object list * @@ -122,6 +155,11 @@ efi_status_t efi_init_obj_list(void) if (ret != EFI_SUCCESS) goto out;
+ /* Secure boot */ + ret = efi_init_secure_boot(); + if (ret != EFI_SUCCESS) + goto out; + /* Indicate supported runtime services */ ret = efi_init_runtime_supported(); if (ret != EFI_SUCCESS)