118 lines
2.7 KiB
C
118 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* efi_selftest_rng
|
|
*
|
|
* Copyright (c) 2019 Heinrich Schuchardt <xypron.glpk@gmx.de>
|
|
*
|
|
* Test the random number generator service.
|
|
*/
|
|
|
|
#include <efi_selftest.h>
|
|
#include <efi_rng.h>
|
|
|
|
#define RNG_LEN 9
|
|
|
|
static struct efi_boot_services *boottime;
|
|
static efi_guid_t efi_rng_guid = EFI_RNG_PROTOCOL_GUID;
|
|
|
|
/*
|
|
* Setup unit test.
|
|
*
|
|
* @handle: handle of the loaded image
|
|
* @systable: system table
|
|
* @return: EFI_ST_SUCCESS for success
|
|
*/
|
|
static int setup(const efi_handle_t handle,
|
|
const struct efi_system_table *systable)
|
|
{
|
|
boottime = systable->boottime;
|
|
return EFI_ST_SUCCESS;
|
|
}
|
|
|
|
/*
|
|
* Execute unit test.
|
|
*
|
|
* Retrieve available RNG algorithms.
|
|
* Retrieve two random values and compare them.
|
|
*
|
|
* @return: EFI_ST_SUCCESS for success
|
|
*/
|
|
static int execute(void)
|
|
{
|
|
efi_status_t ret;
|
|
efi_uintn_t size;
|
|
struct efi_rng_protocol *rng;
|
|
efi_guid_t *algo_list;
|
|
u8 rnd1[RNG_LEN] __aligned(4), rnd2[RNG_LEN] __aligned(4);
|
|
int r;
|
|
|
|
/* Get random number generator protocol */
|
|
ret = boottime->locate_protocol(&efi_rng_guid, NULL, (void **)&rng);
|
|
if (ret != EFI_SUCCESS) {
|
|
efi_st_error(
|
|
"Random number generator protocol not available\n");
|
|
return EFI_ST_FAILURE;
|
|
}
|
|
|
|
ret = rng->get_info(rng, &size, NULL);
|
|
if (ret != EFI_BUFFER_TOO_SMALL) {
|
|
efi_st_error("Could not retrieve alorithm list size\n");
|
|
return EFI_ST_FAILURE;
|
|
}
|
|
if (size < sizeof(efi_guid_t)) {
|
|
efi_st_error("Empty alorithm list\n");
|
|
return EFI_ST_FAILURE;
|
|
}
|
|
|
|
ret = boottime->allocate_pool(EFI_LOADER_DATA, size,
|
|
(void **)&algo_list);
|
|
if (ret != EFI_SUCCESS) {
|
|
efi_st_error("Could not allocate pool memory\n");
|
|
return EFI_ST_FAILURE;
|
|
}
|
|
|
|
ret = rng->get_info(rng, &size, algo_list);
|
|
if (ret != EFI_SUCCESS) {
|
|
efi_st_error("Could not get info\n");
|
|
return EFI_ST_FAILURE;
|
|
}
|
|
if (size < sizeof(efi_guid_t)) {
|
|
efi_st_error("Empty alorithm list\n");
|
|
return EFI_ST_FAILURE;
|
|
}
|
|
|
|
memset(rnd1, 0, RNG_LEN);
|
|
memset(rnd2, 0, RNG_LEN);
|
|
|
|
ret = rng->get_rng(rng, NULL, RNG_LEN - 1, &rnd1[1]);
|
|
if (ret != EFI_SUCCESS) {
|
|
efi_st_error("Could not get random value\n");
|
|
return EFI_ST_FAILURE;
|
|
}
|
|
ret = rng->get_rng(rng, algo_list, RNG_LEN - 1, &rnd2[1]);
|
|
if (ret != EFI_SUCCESS) {
|
|
efi_st_error("Could not get random value\n");
|
|
return EFI_ST_FAILURE;
|
|
}
|
|
r = memcmp(rnd1, rnd2, RNG_LEN);
|
|
if (!r) {
|
|
efi_st_error("Two equal consecutive random numbers\n");
|
|
return EFI_ST_FAILURE;
|
|
}
|
|
|
|
ret = boottime->free_pool(algo_list);
|
|
if (ret != EFI_SUCCESS) {
|
|
efi_st_error("Could not free pool memory\n");
|
|
return EFI_ST_FAILURE;
|
|
}
|
|
|
|
return EFI_ST_SUCCESS;
|
|
}
|
|
|
|
EFI_UNIT_TEST(rng) = {
|
|
.name = "random number generator",
|
|
.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
|
|
.setup = setup,
|
|
.execute = execute,
|
|
};
|