tests/vboot_kernel2_tests.c - third_party/platform/vboot_reference - Git at Google

 /* Copyright 2021 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 miniOS kernel selection, loading, verification, and booting.
  */

 #include "2api.h"
 #include "2common.h"
 #include "2misc.h"
 #include "2nvstorage.h"
 #include "2secdata.h"
 #include "load_kernel_fw.h"
 #include "test_common.h"
 #include "vboot_api.h"

 #define MAX_MOCK_KERNELS 10
 #define KBUF_SIZE 65536

 /* Internal struct to simulate a stream for sector-based disks */
 struct disk_stream {
 	/* Disk handle */
 	VbExDiskHandle_t handle;

 	/* Next sector to read */
 	uint64_t sector;

 	/* Number of sectors left */
 	uint64_t sectors_left;
 };

 /* Represent a "kernel" located on the disk */
 struct mock_kernel {
 	/* Sector where the kernel begins */
 	uint64_t sector;

 	/* Return value from vb2_load_partition */
 	vb2_error_t rv;

 	/* Number of times the sector was read */
 	int read_count;
 };

 /* Mock data */
 static struct vb2_context *ctx;
 static struct vb2_shared_data *sd;
 static struct vb2_workbuf wb;
 static uint8_t workbuf[VB2_KERNEL_WORKBUF_RECOMMENDED_SIZE]
 	__attribute__((aligned(VB2_WORKBUF_ALIGN)));
 static enum vb2_boot_mode *boot_mode;

 static VbSelectAndLoadKernelParams lkp;
 static VbDiskInfo disk_info;
 static struct vb2_keyblock kbh;
 static struct vb2_kernel_preamble kph;
 static uint8_t kernel_buffer[80000];

 static struct mock_kernel kernels[MAX_MOCK_KERNELS];
 static int kernel_count;
 static struct mock_kernel *cur_kernel;

 static int mock_tpm_set_mode_calls;

 static void add_mock_kernel(uint64_t sector, vb2_error_t rv)
 {
 	if (kernel_count >= ARRAY_SIZE(kernels)) {
 		TEST_TRUE(0, "  kernel_count ran out of entries!");
 		return;
 	}

 	kernels[kernel_count].sector = sector;
 	kernels[kernel_count].rv = rv;
 	kernel_count++;
 }

 static void reset_common_data(void)
 {
 	TEST_SUCC(vb2api_init(workbuf, sizeof(workbuf), &ctx),
 		  "vb2api_init failed");
 	vb2_workbuf_from_ctx(ctx, &wb);
 	vb2_nv_init(ctx);
 	vb2api_secdata_kernel_create(ctx);
 	vb2_secdata_kernel_init(ctx);
 	ctx->flags = VB2_CONTEXT_RECOVERY_MODE;

 	boot_mode = (enum vb2_boot_mode *)&ctx->boot_mode;
 	*boot_mode = VB2_BOOT_MODE_MANUAL_RECOVERY;

 	sd = vb2_get_sd(ctx);
 	sd->kernel_version_secdata = 0xabcdef | (1 << 24);

 	memset(&lkp, 0, sizeof(lkp));
 	lkp.kernel_buffer = kernel_buffer;
 	lkp.kernel_buffer_size = sizeof(kernel_buffer);
 	lkp.disk_handle = (VbExDiskHandle_t)1;

 	memset(&disk_info, 0, sizeof(disk_info));
 	disk_info.bytes_per_lba = 512;
 	disk_info.lba_count = 1024;
 	disk_info.handle = lkp.disk_handle;

 	memset(&kbh, 0, sizeof(kbh));
 	kbh.data_key.key_version = 2;
 	kbh.keyblock_flags = VB2_KEYBLOCK_FLAG_DEVELOPER_0
 		| VB2_KEYBLOCK_FLAG_DEVELOPER_1
 		| VB2_KEYBLOCK_FLAG_RECOVERY_1
 		| VB2_KEYBLOCK_FLAG_MINIOS_1;
 	kbh.keyblock_size = sizeof(kbh);

 	memset(&kph, 0, sizeof(kph));
 	kph.kernel_version = 1;
 	kph.preamble_size = 4096 - kbh.keyblock_size;
 	kph.body_signature.data_size = 0;
 	kph.bootloader_address = 0xbeadd008;
 	kph.bootloader_size = 0x1234;


 	memset(&kernels, 0, sizeof(kernels));
 	kernel_count = 0;
 	cur_kernel = NULL;

 	mock_tpm_set_mode_calls = 0;
 }

 /* Mocks */

 vb2_error_t VbExStreamOpen(VbExDiskHandle_t handle, uint64_t lba_start,
 			   uint64_t lba_count, VbExStream_t *stream)
 {
 	struct disk_stream *s;
 	uint64_t i;

 	if (!handle) {
 		*stream = NULL;
 		return VB2_ERROR_UNKNOWN;
 	}

 	if (lba_start + lba_count > disk_info.lba_count)
 		return VB2_ERROR_UNKNOWN;

 	s = malloc(sizeof(*s));
 	s->handle = handle;
 	s->sector = lba_start;
 	s->sectors_left = lba_count;

 	*stream = (void *)s;

 	for (i = 0; i < kernel_count; i++) {
 		if (kernels[i].sector == lba_start)
 			cur_kernel = &kernels[i];
 	}

 	return VB2_SUCCESS;
 }

 vb2_error_t VbExStreamRead(VbExStream_t stream, uint32_t bytes, void *buffer)
 {
 	struct disk_stream *s = (struct disk_stream *)stream;
 	uint64_t sectors;
 	uint64_t i;

 	if (!s)
 		return VB2_ERROR_UNKNOWN;

 	/* For now, require reads to be a multiple of the LBA size */
 	if (bytes % disk_info.bytes_per_lba)
 		return VB2_ERROR_UNKNOWN;

 	/* Fail on overflow */
 	sectors = bytes / disk_info.bytes_per_lba;
 	if (sectors > s->sectors_left)
 		return VB2_ERROR_UNKNOWN;

 	memset(buffer, 0, bytes);
 	for (i = 0; i < kernel_count; i++) {
 		if (kernels[i].sector >= s->sector &&
 		    kernels[i].sector < s->sector + sectors) {
 			VB2_DEBUG("Simulating kernel %" PRIu64 " match\n", i);
 			uint64_t buf_offset = (kernels[i].sector - s->sector)
 				* disk_info.bytes_per_lba;
 			memcpy(buffer + buf_offset, VB2_KEYBLOCK_MAGIC,
 			       VB2_KEYBLOCK_MAGIC_SIZE);
 			kernels[i].read_count++;
 			TEST_TRUE(kernels[i].read_count <= 2,
 				  "  Max read count exceeded");
 		}
 	}

 	s->sector += sectors;
 	s->sectors_left -= sectors;

 	return VB2_SUCCESS;
 }

 void VbExStreamClose(VbExStream_t stream)
 {
 	free(stream);
 }

 vb2_error_t vb2_unpack_key_buffer(struct vb2_public_key *key,
 				  const uint8_t *buf, uint32_t size)
 {
 	return cur_kernel->rv;
 }

 vb2_error_t vb2_verify_keyblock(struct vb2_keyblock *block, uint32_t size,
 				const struct vb2_public_key *key,
 				const struct vb2_workbuf *w)
 {
 	/* Use this as an opportunity to override the keyblock */
 	memcpy((void *)block, &kbh, sizeof(kbh));

 	return cur_kernel->rv;
 }

 vb2_error_t vb2_verify_keyblock_hash(const struct vb2_keyblock *block,
 				     uint32_t size,
 				     const struct vb2_workbuf *w)
 {
 	/* Use this as an opportunity to override the keyblock */
 	memcpy((void *)block, &kbh, sizeof(kbh));

 	return cur_kernel->rv;
 }

 vb2_error_t vb2_verify_kernel_preamble(struct vb2_kernel_preamble *preamble,
 			       uint32_t size, const struct vb2_public_key *key,
 			       const struct vb2_workbuf *w)
 {
 	/* Use this as an opportunity to override the preamble */
 	memcpy((void *)preamble, &kph, sizeof(kph));

 	return cur_kernel->rv;
 }

 vb2_error_t vb2_verify_data(const uint8_t *data, uint32_t size,
 			    struct vb2_signature *sig,
 			    const struct vb2_public_key *key,
 			    const struct vb2_workbuf *w)
 {
 	return cur_kernel->rv;
 }

 vb2_error_t vb2_digest_buffer(const uint8_t *buf, uint32_t size,
 			      enum vb2_hash_algorithm hash_alg, uint8_t *digest,
 			      uint32_t digest_size)
 {
 	return cur_kernel->rv;
 }

 vb2_error_t vb2ex_tpm_set_mode(enum vb2_tpm_mode mode_val)
 {
 	mock_tpm_set_mode_calls++;
 	return VB2_SUCCESS;
 }

 /* Make sure nothing tested here ever calls this directly. */
 void vb2api_fail(struct vb2_context *c, uint8_t reason, uint8_t subcode)
 {
 	TEST_TRUE(0, "  called vb2api_fail()");
 }

 /* Tests */

 static void load_minios_kernel_tests(void)
 {
 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 1;
 	add_mock_kernel(0, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "{valid kernel}");
 	TEST_EQ(mock_tpm_set_mode_calls, 1,
 		"  TPM disabled");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 1;
 	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		VB2_ERROR_LK_NO_KERNEL_FOUND, "{no kernel}");
 	TEST_EQ(mock_tpm_set_mode_calls, 0,
 		"  TPM not disabled");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(1, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "{no kernel, valid kernel}");
 	TEST_EQ(cur_kernel->sector, 1, "  select kernel");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_ERROR_MOCK);
 	add_mock_kernel(1, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "{invalid kernel, valid kernel}");
 	TEST_EQ(cur_kernel->sector, 1, "  select second kernel");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_ERROR_MOCK);
 	add_mock_kernel(1, VB2_ERROR_MOCK);
 	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		VB2_ERROR_LK_NO_KERNEL_FOUND,
 		"{invalid kernel, invalid kernel}");
 	TEST_EQ(mock_tpm_set_mode_calls, 0,
 		"  TPM not disabled");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_SUCCESS);
 	add_mock_kernel(1, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "{valid kernel, valid kernel} minios_priority=0");
 	TEST_EQ(cur_kernel->sector, 0, "  select first kernel");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_SUCCESS);
 	add_mock_kernel(1, VB2_SUCCESS);
 	vb2_nv_set(ctx, VB2_NV_MINIOS_PRIORITY, 1);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "{valid kernel, valid kernel} minios_priority=1");
 	TEST_EQ(cur_kernel->sector, 1, "  select second kernel");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_SUCCESS);
 	add_mock_kernel(1, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info,
 				   VB_MINIOS_FLAG_NON_ACTIVE),
 		  "{valid kernel, valid kernel} minios_priority=0 non-active");
 	TEST_EQ(cur_kernel->sector, 1, "  select second kernel");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_ERROR_MOCK);
 	add_mock_kernel(1, VB2_SUCCESS);
 	vb2_nv_set(ctx, VB2_NV_MINIOS_PRIORITY, 1);
 	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info,
 				 VB_MINIOS_FLAG_NON_ACTIVE),
 		VB2_ERROR_LK_NO_KERNEL_FOUND,
 		"{invalid kernel, valid kernel} minios_priority=1 non-active");

 	reset_common_data();
 	disk_info.bytes_per_lba = VB2_KEYBLOCK_MAGIC_SIZE;
 	disk_info.lba_count = 4;
 	add_mock_kernel(1, VB2_SUCCESS);
 	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		VB2_ERROR_LK_NO_KERNEL_FOUND,
 		"valid kernel header near start of disk (disk too small)");

 	reset_common_data();
 	disk_info.bytes_per_lba = VB2_KEYBLOCK_MAGIC_SIZE;
 	disk_info.lba_count = 1000;
 	add_mock_kernel(999, VB2_SUCCESS);
 	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		VB2_ERROR_LK_NO_KERNEL_FOUND,
 		"valid kernel header near end of disk");

 	reset_common_data();
 	disk_info.bytes_per_lba = 1024;
 	disk_info.lba_count = 128;
 	add_mock_kernel(63, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "start/end overlap assuming >128 MB search range (start)");

 	reset_common_data();
 	disk_info.bytes_per_lba = 1024;
 	disk_info.lba_count = 128;
 	add_mock_kernel(64, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "start/end overlap assuming >128 MB search range (end)");

 	reset_common_data();
 	disk_info.bytes_per_lba = 128;
 	disk_info.lba_count = 1024;
 	add_mock_kernel(3, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "kernel at last sector in batch assuming 512 KB batches");

 	reset_common_data();
 	disk_info.bytes_per_lba = 256;
 	disk_info.lba_count = 1024;
 	add_mock_kernel(3, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "kernel at last sector in batch assuming 1 MB batches");

 	reset_common_data();
 	disk_info.bytes_per_lba = 512;
 	disk_info.lba_count = 1024;
 	add_mock_kernel(3, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "kernel at last sector in batch assuming 2 MB batches");

 	reset_common_data();
 	kbh.keyblock_flags = VB2_KEYBLOCK_FLAG_DEVELOPER_0
 		| VB2_KEYBLOCK_FLAG_RECOVERY_1
 		| VB2_KEYBLOCK_FLAG_MINIOS_1;
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_SUCCESS);
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		  "kernel with minios keyblock flag");

 	reset_common_data();
 	kbh.keyblock_flags = VB2_KEYBLOCK_FLAG_DEVELOPER_0
 		| VB2_KEYBLOCK_FLAG_RECOVERY_1
 		| VB2_KEYBLOCK_FLAG_MINIOS_0;
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_SUCCESS);
 	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		VB2_ERROR_LK_NO_KERNEL_FOUND,
 		"kernel with !minios keyblock flag");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_SUCCESS);
 	sd->kernel_version_secdata = 5 << 24;
 	kph.kernel_version = 4;
 	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		VB2_ERROR_LK_NO_KERNEL_FOUND,
 		"kernel version too old");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_SUCCESS);
 	sd->kernel_version_secdata = 5 << 24;
 	kph.kernel_version = 0x100;
 	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		VB2_ERROR_LK_NO_KERNEL_FOUND,
 		"kernel version greater than 0xff");

 	reset_common_data();
 	disk_info.bytes_per_lba = KBUF_SIZE;
 	disk_info.lba_count = 2;
 	add_mock_kernel(0, VB2_SUCCESS);
 	sd->kernel_version_secdata = 5 << 24;
 	kph.kernel_version = 6;
 	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
 		 "newer kernel version");
 }

 int main(void)
 {
 	load_minios_kernel_tests();

 	return gTestSuccess ? 0 : 255;
 }
	/* Copyright 2021 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 miniOS kernel selection, loading, verification, and booting.
	*/

	#include "2api.h"
	#include "2common.h"
	#include "2misc.h"
	#include "2nvstorage.h"
	#include "2secdata.h"
	#include "load_kernel_fw.h"
	#include "test_common.h"
	#include "vboot_api.h"

	#define MAX_MOCK_KERNELS 10
	#define KBUF_SIZE 65536

	/* Internal struct to simulate a stream for sector-based disks */
	struct disk_stream {
	/* Disk handle */
	VbExDiskHandle_t handle;

	/* Next sector to read */
	uint64_t sector;

	/* Number of sectors left */
	uint64_t sectors_left;
	};

	/* Represent a "kernel" located on the disk */
	struct mock_kernel {
	/* Sector where the kernel begins */
	uint64_t sector;

	/* Return value from vb2_load_partition */
	vb2_error_t rv;

	/* Number of times the sector was read */
	int read_count;
	};

	/* Mock data */
	static struct vb2_context *ctx;
	static struct vb2_shared_data *sd;
	static struct vb2_workbuf wb;
	static uint8_t workbuf[VB2_KERNEL_WORKBUF_RECOMMENDED_SIZE]
	__attribute__((aligned(VB2_WORKBUF_ALIGN)));
	static enum vb2_boot_mode *boot_mode;

	static VbSelectAndLoadKernelParams lkp;
	static VbDiskInfo disk_info;
	static struct vb2_keyblock kbh;
	static struct vb2_kernel_preamble kph;
	static uint8_t kernel_buffer[80000];

	static struct mock_kernel kernels[MAX_MOCK_KERNELS];
	static int kernel_count;
	static struct mock_kernel *cur_kernel;

	static int mock_tpm_set_mode_calls;

	static void add_mock_kernel(uint64_t sector, vb2_error_t rv)
	{
	if (kernel_count >= ARRAY_SIZE(kernels)) {
	TEST_TRUE(0, " kernel_count ran out of entries!");
	return;
	}

	kernels[kernel_count].sector = sector;
	kernels[kernel_count].rv = rv;
	kernel_count++;
	}

	static void reset_common_data(void)
	{
	TEST_SUCC(vb2api_init(workbuf, sizeof(workbuf), &ctx),
	"vb2api_init failed");
	vb2_workbuf_from_ctx(ctx, &wb);
	vb2_nv_init(ctx);
	vb2api_secdata_kernel_create(ctx);
	vb2_secdata_kernel_init(ctx);
	ctx->flags = VB2_CONTEXT_RECOVERY_MODE;

	boot_mode = (enum vb2_boot_mode *)&ctx->boot_mode;
	*boot_mode = VB2_BOOT_MODE_MANUAL_RECOVERY;

	sd = vb2_get_sd(ctx);
	sd->kernel_version_secdata = 0xabcdef \| (1 << 24);

	memset(&lkp, 0, sizeof(lkp));
	lkp.kernel_buffer = kernel_buffer;
	lkp.kernel_buffer_size = sizeof(kernel_buffer);
	lkp.disk_handle = (VbExDiskHandle_t)1;

	memset(&disk_info, 0, sizeof(disk_info));
	disk_info.bytes_per_lba = 512;
	disk_info.lba_count = 1024;
	disk_info.handle = lkp.disk_handle;

	memset(&kbh, 0, sizeof(kbh));
	kbh.data_key.key_version = 2;
	kbh.keyblock_flags = VB2_KEYBLOCK_FLAG_DEVELOPER_0
	\| VB2_KEYBLOCK_FLAG_DEVELOPER_1
	\| VB2_KEYBLOCK_FLAG_RECOVERY_1
	\| VB2_KEYBLOCK_FLAG_MINIOS_1;
	kbh.keyblock_size = sizeof(kbh);

	memset(&kph, 0, sizeof(kph));
	kph.kernel_version = 1;
	kph.preamble_size = 4096 - kbh.keyblock_size;
	kph.body_signature.data_size = 0;
	kph.bootloader_address = 0xbeadd008;
	kph.bootloader_size = 0x1234;


	memset(&kernels, 0, sizeof(kernels));
	kernel_count = 0;
	cur_kernel = NULL;

	mock_tpm_set_mode_calls = 0;
	}

	/* Mocks */

	vb2_error_t VbExStreamOpen(VbExDiskHandle_t handle, uint64_t lba_start,
	uint64_t lba_count, VbExStream_t *stream)
	{
	struct disk_stream *s;
	uint64_t i;

	if (!handle) {
	*stream = NULL;
	return VB2_ERROR_UNKNOWN;
	}

	if (lba_start + lba_count > disk_info.lba_count)
	return VB2_ERROR_UNKNOWN;

	s = malloc(sizeof(*s));
	s->handle = handle;
	s->sector = lba_start;
	s->sectors_left = lba_count;

	stream = (void )s;

	for (i = 0; i < kernel_count; i++) {
	if (kernels[i].sector == lba_start)
	cur_kernel = &kernels[i];
	}

	return VB2_SUCCESS;
	}

	vb2_error_t VbExStreamRead(VbExStream_t stream, uint32_t bytes, void *buffer)
	{
	struct disk_stream s = (struct disk_stream )stream;
	uint64_t sectors;
	uint64_t i;

	if (!s)
	return VB2_ERROR_UNKNOWN;

	/* For now, require reads to be a multiple of the LBA size */
	if (bytes % disk_info.bytes_per_lba)
	return VB2_ERROR_UNKNOWN;

	/* Fail on overflow */
	sectors = bytes / disk_info.bytes_per_lba;
	if (sectors > s->sectors_left)
	return VB2_ERROR_UNKNOWN;

	memset(buffer, 0, bytes);
	for (i = 0; i < kernel_count; i++) {
	if (kernels[i].sector >= s->sector &&
	kernels[i].sector < s->sector + sectors) {
	VB2_DEBUG("Simulating kernel %" PRIu64 " match\n", i);
	uint64_t buf_offset = (kernels[i].sector - s->sector)
	* disk_info.bytes_per_lba;
	memcpy(buffer + buf_offset, VB2_KEYBLOCK_MAGIC,
	VB2_KEYBLOCK_MAGIC_SIZE);
	kernels[i].read_count++;
	TEST_TRUE(kernels[i].read_count <= 2,
	" Max read count exceeded");
	}
	}

	s->sector += sectors;
	s->sectors_left -= sectors;

	return VB2_SUCCESS;
	}

	void VbExStreamClose(VbExStream_t stream)
	{
	free(stream);
	}

	vb2_error_t vb2_unpack_key_buffer(struct vb2_public_key *key,
	const uint8_t *buf, uint32_t size)
	{
	return cur_kernel->rv;
	}

	vb2_error_t vb2_verify_keyblock(struct vb2_keyblock *block, uint32_t size,
	const struct vb2_public_key *key,
	const struct vb2_workbuf *w)
	{
	/* Use this as an opportunity to override the keyblock */
	memcpy((void *)block, &kbh, sizeof(kbh));

	return cur_kernel->rv;
	}

	vb2_error_t vb2_verify_keyblock_hash(const struct vb2_keyblock *block,
	uint32_t size,
	const struct vb2_workbuf *w)
	{
	/* Use this as an opportunity to override the keyblock */
	memcpy((void *)block, &kbh, sizeof(kbh));

	return cur_kernel->rv;
	}

	vb2_error_t vb2_verify_kernel_preamble(struct vb2_kernel_preamble *preamble,
	uint32_t size, const struct vb2_public_key *key,
	const struct vb2_workbuf *w)
	{
	/* Use this as an opportunity to override the preamble */
	memcpy((void *)preamble, &kph, sizeof(kph));

	return cur_kernel->rv;
	}

	vb2_error_t vb2_verify_data(const uint8_t *data, uint32_t size,
	struct vb2_signature *sig,
	const struct vb2_public_key *key,
	const struct vb2_workbuf *w)
	{
	return cur_kernel->rv;
	}

	vb2_error_t vb2_digest_buffer(const uint8_t *buf, uint32_t size,
	enum vb2_hash_algorithm hash_alg, uint8_t *digest,
	uint32_t digest_size)
	{
	return cur_kernel->rv;
	}

	vb2_error_t vb2ex_tpm_set_mode(enum vb2_tpm_mode mode_val)
	{
	mock_tpm_set_mode_calls++;
	return VB2_SUCCESS;
	}

	/* Make sure nothing tested here ever calls this directly. */
	void vb2api_fail(struct vb2_context *c, uint8_t reason, uint8_t subcode)
	{
	TEST_TRUE(0, " called vb2api_fail()");
	}

	/* Tests */

	static void load_minios_kernel_tests(void)
	{
	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 1;
	add_mock_kernel(0, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"{valid kernel}");
	TEST_EQ(mock_tpm_set_mode_calls, 1,
	" TPM disabled");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 1;
	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	VB2_ERROR_LK_NO_KERNEL_FOUND, "{no kernel}");
	TEST_EQ(mock_tpm_set_mode_calls, 0,
	" TPM not disabled");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(1, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"{no kernel, valid kernel}");
	TEST_EQ(cur_kernel->sector, 1, " select kernel");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_ERROR_MOCK);
	add_mock_kernel(1, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"{invalid kernel, valid kernel}");
	TEST_EQ(cur_kernel->sector, 1, " select second kernel");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_ERROR_MOCK);
	add_mock_kernel(1, VB2_ERROR_MOCK);
	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	VB2_ERROR_LK_NO_KERNEL_FOUND,
	"{invalid kernel, invalid kernel}");
	TEST_EQ(mock_tpm_set_mode_calls, 0,
	" TPM not disabled");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_SUCCESS);
	add_mock_kernel(1, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"{valid kernel, valid kernel} minios_priority=0");
	TEST_EQ(cur_kernel->sector, 0, " select first kernel");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_SUCCESS);
	add_mock_kernel(1, VB2_SUCCESS);
	vb2_nv_set(ctx, VB2_NV_MINIOS_PRIORITY, 1);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"{valid kernel, valid kernel} minios_priority=1");
	TEST_EQ(cur_kernel->sector, 1, " select second kernel");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_SUCCESS);
	add_mock_kernel(1, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info,
	VB_MINIOS_FLAG_NON_ACTIVE),
	"{valid kernel, valid kernel} minios_priority=0 non-active");
	TEST_EQ(cur_kernel->sector, 1, " select second kernel");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_ERROR_MOCK);
	add_mock_kernel(1, VB2_SUCCESS);
	vb2_nv_set(ctx, VB2_NV_MINIOS_PRIORITY, 1);
	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info,
	VB_MINIOS_FLAG_NON_ACTIVE),
	VB2_ERROR_LK_NO_KERNEL_FOUND,
	"{invalid kernel, valid kernel} minios_priority=1 non-active");

	reset_common_data();
	disk_info.bytes_per_lba = VB2_KEYBLOCK_MAGIC_SIZE;
	disk_info.lba_count = 4;
	add_mock_kernel(1, VB2_SUCCESS);
	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	VB2_ERROR_LK_NO_KERNEL_FOUND,
	"valid kernel header near start of disk (disk too small)");

	reset_common_data();
	disk_info.bytes_per_lba = VB2_KEYBLOCK_MAGIC_SIZE;
	disk_info.lba_count = 1000;
	add_mock_kernel(999, VB2_SUCCESS);
	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	VB2_ERROR_LK_NO_KERNEL_FOUND,
	"valid kernel header near end of disk");

	reset_common_data();
	disk_info.bytes_per_lba = 1024;
	disk_info.lba_count = 128;
	add_mock_kernel(63, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"start/end overlap assuming >128 MB search range (start)");

	reset_common_data();
	disk_info.bytes_per_lba = 1024;
	disk_info.lba_count = 128;
	add_mock_kernel(64, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"start/end overlap assuming >128 MB search range (end)");

	reset_common_data();
	disk_info.bytes_per_lba = 128;
	disk_info.lba_count = 1024;
	add_mock_kernel(3, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"kernel at last sector in batch assuming 512 KB batches");

	reset_common_data();
	disk_info.bytes_per_lba = 256;
	disk_info.lba_count = 1024;
	add_mock_kernel(3, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"kernel at last sector in batch assuming 1 MB batches");

	reset_common_data();
	disk_info.bytes_per_lba = 512;
	disk_info.lba_count = 1024;
	add_mock_kernel(3, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"kernel at last sector in batch assuming 2 MB batches");

	reset_common_data();
	kbh.keyblock_flags = VB2_KEYBLOCK_FLAG_DEVELOPER_0
	\| VB2_KEYBLOCK_FLAG_RECOVERY_1
	\| VB2_KEYBLOCK_FLAG_MINIOS_1;
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_SUCCESS);
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"kernel with minios keyblock flag");

	reset_common_data();
	kbh.keyblock_flags = VB2_KEYBLOCK_FLAG_DEVELOPER_0
	\| VB2_KEYBLOCK_FLAG_RECOVERY_1
	\| VB2_KEYBLOCK_FLAG_MINIOS_0;
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_SUCCESS);
	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	VB2_ERROR_LK_NO_KERNEL_FOUND,
	"kernel with !minios keyblock flag");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_SUCCESS);
	sd->kernel_version_secdata = 5 << 24;
	kph.kernel_version = 4;
	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	VB2_ERROR_LK_NO_KERNEL_FOUND,
	"kernel version too old");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_SUCCESS);
	sd->kernel_version_secdata = 5 << 24;
	kph.kernel_version = 0x100;
	TEST_EQ(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	VB2_ERROR_LK_NO_KERNEL_FOUND,
	"kernel version greater than 0xff");

	reset_common_data();
	disk_info.bytes_per_lba = KBUF_SIZE;
	disk_info.lba_count = 2;
	add_mock_kernel(0, VB2_SUCCESS);
	sd->kernel_version_secdata = 5 << 24;
	kph.kernel_version = 6;
	TEST_SUCC(LoadMiniOsKernel(ctx, &lkp, &disk_info, 0),
	"newer kernel version");
	}

	int main(void)
	{
	load_minios_kernel_tests();

	return gTestSuccess ? 0 : 255;
	}