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/* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Tests for firmware management parameters (FWMP) library.
*/
#include "2common.h"
#include "2misc.h"
#include "2secdata.h"
#include "2secdata_struct.h"
#include "test_common.h"
static uint8_t workbuf[VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE]
__attribute__ ((aligned (VB2_WORKBUF_ALIGN)));
static struct vb2_context *ctx;
static struct vb2_gbb_header gbb;
static struct vb2_shared_data *sd;
static struct vb2_secdata_fwmp *sec;
static void reset_common_data(void)
{
memset(workbuf, 0xaa, sizeof(workbuf));
TEST_SUCC(vb2api_init(workbuf, sizeof(workbuf), &ctx),
"vb2api_init failed");
sd = vb2_get_sd(ctx);
sd->status = VB2_SD_STATUS_SECDATA_FWMP_INIT;
memset(&gbb, 0, sizeof(gbb));
sec = (struct vb2_secdata_fwmp *)ctx->secdata_fwmp;
sec->struct_size = VB2_SECDATA_FWMP_MIN_SIZE;
sec->struct_version = VB2_SECDATA_FWMP_VERSION;
sec->flags = 0;
sec->crc8 = vb2_secdata_fwmp_crc(sec);
}
/* Mocked functions */
struct vb2_gbb_header *vb2_get_gbb(struct vb2_context *c)
{
return &gbb;
}
static void check_init_test(void)
{
uint8_t size;
/* Check size constants */
TEST_TRUE(sizeof(struct vb2_secdata_fwmp) >= VB2_SECDATA_FWMP_MIN_SIZE,
"Struct min size constant");
TEST_TRUE(sizeof(struct vb2_secdata_fwmp) <= VB2_SECDATA_FWMP_MAX_SIZE,
"Struct max size constant");
/* struct_size too large */
reset_common_data();
sec->struct_size = VB2_SECDATA_FWMP_MAX_SIZE + 1;
sec->crc8 = vb2_secdata_fwmp_crc(sec);
size = sec->struct_size;
TEST_EQ(vb2api_secdata_fwmp_check(ctx, &size),
VB2_ERROR_SECDATA_FWMP_SIZE, "Check struct_size too large");
TEST_EQ(vb2_secdata_fwmp_init(ctx),
VB2_ERROR_SECDATA_FWMP_SIZE, "Init struct_size too large");
/* struct_size too small */
reset_common_data();
sec->struct_size = VB2_SECDATA_FWMP_MIN_SIZE - 1;
sec->crc8 = vb2_secdata_fwmp_crc(sec);
size = VB2_SECDATA_FWMP_MIN_SIZE;
TEST_EQ(vb2api_secdata_fwmp_check(ctx, &size),
VB2_ERROR_SECDATA_FWMP_SIZE, "Check struct_size too small");
/* Need more data to reach minimum size */
reset_common_data();
sec->struct_size = VB2_SECDATA_FWMP_MIN_SIZE - 1;
sec->crc8 = vb2_secdata_fwmp_crc(sec);
size = 0;
TEST_EQ(vb2api_secdata_fwmp_check(ctx, &size),
VB2_ERROR_SECDATA_FWMP_INCOMPLETE, "Check more to reach MIN");
TEST_EQ(vb2_secdata_fwmp_init(ctx),
VB2_ERROR_SECDATA_FWMP_INCOMPLETE, "Init more to reach MIN");
/* Need more data to reach full size */
reset_common_data();
sec->struct_size = VB2_SECDATA_FWMP_MIN_SIZE + 1;
sec->crc8 = vb2_secdata_fwmp_crc(sec);
size = VB2_SECDATA_FWMP_MIN_SIZE;
TEST_EQ(vb2api_secdata_fwmp_check(ctx, &size),
VB2_ERROR_SECDATA_FWMP_INCOMPLETE, "Check more for full size");
/* Bad data is invalid */
reset_common_data();
memset(&ctx->secdata_fwmp, 0xa6, sizeof(ctx->secdata_fwmp));
sec->struct_size = VB2_SECDATA_FWMP_MIN_SIZE;
size = sec->struct_size;
TEST_EQ(vb2api_secdata_fwmp_check(ctx, &size),
VB2_ERROR_SECDATA_FWMP_CRC, "Check bad data CRC");
TEST_EQ(vb2_secdata_fwmp_init(ctx),
VB2_ERROR_SECDATA_FWMP_CRC, "Init bad data CRC");
/* Bad CRC with corruption past minimum size */
reset_common_data();
sec->struct_size = VB2_SECDATA_FWMP_MIN_SIZE + 1;
sec->crc8 = vb2_secdata_fwmp_crc(sec);
size = sec->struct_size;
*((uint8_t *)sec + sec->struct_size - 1) += 1;
TEST_EQ(vb2api_secdata_fwmp_check(ctx, &size),
VB2_ERROR_SECDATA_FWMP_CRC, "Check corruption CRC");
TEST_EQ(vb2_secdata_fwmp_init(ctx),
VB2_ERROR_SECDATA_FWMP_CRC, "Init corruption CRC");
/* Zeroed data is invalid */
reset_common_data();
memset(&ctx->secdata_fwmp, 0, sizeof(ctx->secdata_fwmp));
sec->struct_size = VB2_SECDATA_FWMP_MIN_SIZE;
size = sec->struct_size;
TEST_EQ(vb2api_secdata_fwmp_check(ctx, &size),
VB2_ERROR_SECDATA_FWMP_VERSION, "Check zeroed data CRC");
TEST_EQ(vb2_secdata_fwmp_init(ctx),
VB2_ERROR_SECDATA_FWMP_VERSION, "Init zeroed data CRC");
/* Major version too high */
reset_common_data();
sec->struct_version = ((VB2_SECDATA_FWMP_VERSION >> 4) + 1) << 4;
sec->crc8 = vb2_secdata_fwmp_crc(sec);
TEST_EQ(vb2api_secdata_fwmp_check(ctx, &size),
VB2_ERROR_SECDATA_FWMP_VERSION, "Check major too high");
TEST_EQ(vb2_secdata_fwmp_init(ctx),
VB2_ERROR_SECDATA_FWMP_VERSION, "Init major too high");
/* Major version too low */
reset_common_data();
sec->struct_version = ((VB2_SECDATA_FWMP_VERSION >> 4) - 1) << 4;
sec->crc8 = vb2_secdata_fwmp_crc(sec);
TEST_EQ(vb2api_secdata_fwmp_check(ctx, &size),
VB2_ERROR_SECDATA_FWMP_VERSION, "Check major too low");
TEST_EQ(vb2_secdata_fwmp_init(ctx),
VB2_ERROR_SECDATA_FWMP_VERSION, "Init major too low");
/* Minor version difference okay */
reset_common_data();
sec->struct_version += 1;
sec->crc8 = vb2_secdata_fwmp_crc(sec);
TEST_SUCC(vb2api_secdata_fwmp_check(ctx, &size), "Check minor okay");
TEST_SUCC(vb2_secdata_fwmp_init(ctx), "Init minor okay");
/* Good FWMP data at minimum size */
reset_common_data();
TEST_SUCC(vb2api_secdata_fwmp_check(ctx, &size), "Check good (min)");
TEST_SUCC(vb2_secdata_fwmp_init(ctx), "Init good (min)");
TEST_NEQ(sd->status & VB2_SD_STATUS_SECDATA_FWMP_INIT, 0,
"Init flag set");
/* Good FWMP data at minimum + N size */
reset_common_data();
sec->struct_size = VB2_SECDATA_FWMP_MIN_SIZE + 1;
sec->crc8 = vb2_secdata_fwmp_crc(sec);
size = sec->struct_size;
TEST_SUCC(vb2api_secdata_fwmp_check(ctx, &size), "Check good (min+N)");
TEST_SUCC(vb2_secdata_fwmp_init(ctx), "Init good (min+N)");
TEST_NEQ(sd->status & VB2_SD_STATUS_SECDATA_FWMP_INIT, 0,
"Init flag set");
/* Skip data check when NO_SECDATA_FWMP set */
reset_common_data();
memset(&ctx->secdata_fwmp, 0xa6, sizeof(ctx->secdata_fwmp));
ctx->flags |= VB2_CONTEXT_NO_SECDATA_FWMP;
TEST_EQ(vb2_secdata_fwmp_init(ctx), 0,
"Init skip data check when NO_SECDATA_FWMP set");
TEST_NEQ(sd->status & VB2_SD_STATUS_SECDATA_FWMP_INIT, 0,
"Init flag set");
}
static void get_flag_test(void)
{
/* Successfully returns value */
reset_common_data();
sec->flags |= 1;
TEST_EQ(vb2_secdata_fwmp_get_flag(ctx, 1), 1,
"Successfully returns flag value");
/* NO_SECDATA_FWMP */
reset_common_data();
sec->flags |= 1;
ctx->flags |= VB2_CONTEXT_NO_SECDATA_FWMP;
TEST_EQ(vb2_secdata_fwmp_get_flag(ctx, 1), 0,
"NO_SECDATA_FWMP forces default flag value");
/* FWMP hasn't been initialized (recovery mode) */
reset_common_data();
sd->status &= ~VB2_SD_STATUS_SECDATA_FWMP_INIT;
ctx->flags |= VB2_CONTEXT_RECOVERY_MODE;
TEST_EQ(vb2_secdata_fwmp_get_flag(ctx, 0), 0,
"non-init in recovery mode forces default flag value");
/* FWMP hasn't been initialized (normal mode) */
reset_common_data();
sd->status &= ~VB2_SD_STATUS_SECDATA_FWMP_INIT;
TEST_ABORT(vb2_secdata_fwmp_get_flag(ctx, 0),
"non-init in normal mode triggers abort");
}
static void get_dev_key_hash_test(void)
{
/* CONTEXT_NO_SECDATA_FWMP */
reset_common_data();
ctx->flags |= VB2_CONTEXT_NO_SECDATA_FWMP;
TEST_TRUE(vb2_secdata_fwmp_get_dev_key_hash(ctx) == NULL,
"NO_SECDATA_FWMP forces NULL pointer");
/* FWMP hasn't been initialized (recovery mode) */
reset_common_data();
sd->status &= ~VB2_SD_STATUS_SECDATA_FWMP_INIT;
ctx->flags |= VB2_CONTEXT_RECOVERY_MODE;
TEST_TRUE(vb2_secdata_fwmp_get_dev_key_hash(ctx) == NULL,
"non-init in recovery mode forces NULL pointer");
/* FWMP hasn't been initialized (normal mode) */
reset_common_data();
sd->status &= ~VB2_SD_STATUS_SECDATA_FWMP_INIT;
TEST_ABORT(vb2_secdata_fwmp_get_dev_key_hash(ctx),
"non-init in normal mode triggers abort");
/* Success case */
reset_common_data();
TEST_TRUE(vb2_secdata_fwmp_get_dev_key_hash(ctx) ==
sec->dev_key_hash, "proper dev_key_hash pointer returned");
}
int main(int argc, char* argv[])
{
check_init_test();
get_flag_test();
get_dev_key_hash_test();
return gTestSuccess ? 0 : 255;
}
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