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#include <efi.h>
#include <efilib.h>
#include <guid.h>
#include <pecoff.h>
#include <sha256.h>
#include <efiauthenticated.h>
#include <pkcs7verify.h>
#include <variables.h>
#include <shim_protocol.h>
#include <console.h>
static EFI_STATUS shimprotocol_context(void *data, unsigned int size,
PE_COFF_LOADER_IMAGE_CONTEXT *context)
{
return pecoff_read_header(context, data, size);
}
static EFI_STATUS shimprotocol_verify(void *buffer, UINT32 size)
{
EFI_STATUS status;
if (!variable_is_secureboot() || variable_is_setupmode())
return EFI_SUCCESS;
if (pkcs7verify_deny(buffer, size))
return EFI_ACCESS_DENIED;
if (pkcs7verify_allow(buffer, size))
return EFI_SUCCESS;
return EFI_ACCESS_DENIED;
return status;
}
static SHIM_LOCK shim_protocol_interface = {
.Verify = shimprotocol_verify,
.Context = shimprotocol_context,
};
static EFI_HANDLE shim_protocol_handle;
EFI_STATUS
shim_protocol_install(void)
{
return BS->InstallProtocolInterface(&shim_protocol_handle, &MOK_OWNER, EFI_NATIVE_INTERFACE, &shim_protocol_interface);
}
void
shim_protocol_uninstall(void)
{
BS->UninstallProtocolInterface(shim_protocol_handle, &MOK_OWNER, &shim_protocol_interface);
}
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