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527ba810eff4006cf69579f6b96cb4350cb1e189
OpenCellular/tests/vboot_kernel_tests.c
Simon Glass 527ba810ef Implementation of Region API 
At present reading data from storage in Vboot is a little fragmented. For
the firmware image, we expect the boot loader to handle this. For the disk
we have a block-level API. For the GBB (which also sits in the firmware
image) we expect the entire thing to be read before Vboot is called.

Add the concept of a region, and an API to read from a region. At present,
and most pressing, is reading from a GBB region. In the future this could
be extended to other parts of the firmware or even the disk.

Move all access to the GBB into this API so that the boot loader can provide
either a GBB region in one large contiguous chunk, or a function to deal with
read requests from vboot.

The call to VbExRegionRead() is behind a flag since not all boot loaders
support it yet.

The main change for boot loaders which don't support this new API is that
vboot will do more behind the scenes. For example, it will allocate memory
for chunks of data that it reads from the GBB, rather than just accessing it
directly. This approach is considerably simpler than trying to pass char **
everywhere and have vboot decide whether something needs to be allocated or
not.

The tests are updated, mainly to include setting up a GBB structure
accessible from VbCommonParams, which is now required by the firmware and
kernel functions. In normal operation this is set up at the start of
VbLoadFIrmware() and VbSelectAndLoadKernel() but for tests which call
children of these functions directly, the GBB structure must be set up
manually by the test.

BUG=chrome-os-partner:21115
BRANCH=none
TEST=manual
FEATURES=test sudo -E  emerge vboot_reference

Change-Id: If2b8bbe467fdbd643239d8d9b5d7aa98df4d286f
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/63336
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/167361
2013-08-30 16:47:03 +00:00

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/* Copyright (c) 2013 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 vboot_kernel.c
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cgptlib.h"
#include "gbb_header.h"
#include "gpt.h"
#include "host_common.h"
#include "load_kernel_fw.h"
#include "test_common.h"
#include "vboot_api.h"
#include "vboot_common.h"
#include "vboot_kernel.h"
#include "vboot_nvstorage.h"
#define LOGCALL(fmt, args...) sprintf(call_log + strlen(call_log), fmt, ##args)
#define TEST_CALLS(expect_log) TEST_STR_EQ(call_log, expect_log, " calls")
/* Mock kernel partition */
struct mock_part {
uint32_t start;
uint32_t size;
};
/* Partition list; ends with a 0-size partition. */
#define MOCK_PART_COUNT 8
static struct mock_part mock_parts[MOCK_PART_COUNT];
static int mock_part_next;
/* Mock data */
static char call_log[4096];
static uint8_t kernel_buffer[80000];
static int disk_read_to_fail;
static int disk_write_to_fail;
static int gpt_init_fail;
static int key_block_verify_fail; /* 0=ok, 1=sig, 2=hash */
static int preamble_verify_fail;
static int verify_data_fail;
static RSAPublicKey *mock_data_key;
static int mock_data_key_allocated;
static uint8_t gbb_data[sizeof(GoogleBinaryBlockHeader) + 2048];
static GoogleBinaryBlockHeader *gbb = (GoogleBinaryBlockHeader*)gbb_data;
static VbExDiskHandle_t handle;
static VbNvContext vnc;
static uint8_t shared_data[VB_SHARED_DATA_MIN_SIZE];
static VbSharedDataHeader *shared = (VbSharedDataHeader *)shared_data;
static LoadKernelParams lkp;
static VbKeyBlockHeader kbh;
static VbKernelPreambleHeader kph;
static VbCommonParams cparams;
static void ResetCallLog(void)
{
*call_log = 0;
}
/**
* Reset mock data (for use before each test)
*/
static void ResetMocks(void)
{
ResetCallLog();
disk_read_to_fail = -1;
disk_write_to_fail = -1;
gpt_init_fail = 0;
key_block_verify_fail = 0;
preamble_verify_fail = 0;
verify_data_fail = 0;
mock_data_key = (RSAPublicKey *)"TestDataKey";
mock_data_key_allocated = 0;
memset(gbb, 0, sizeof(gbb));
gbb->major_version = GBB_MAJOR_VER;
gbb->minor_version = GBB_MINOR_VER;
gbb->flags = 0;
memset(&cparams, '\0', sizeof(cparams));
cparams.gbb = gbb;
cparams.gbb_data = gbb;
cparams.gbb_size = sizeof(gbb_data);
memset(&vnc, 0, sizeof(vnc));
VbNvSetup(&vnc);
VbNvTeardown(&vnc); /* So CRC gets generated */
memset(&shared_data, 0, sizeof(shared_data));
VbSharedDataInit(shared, sizeof(shared_data));
shared->kernel_version_tpm = 0x20001;
memset(&lkp, 0, sizeof(lkp));
lkp.nv_context = &vnc;
lkp.shared_data_blob = shared;
lkp.gbb_data = gbb;
lkp.gbb_size = sizeof(gbb_data);
lkp.bytes_per_lba = 512;
lkp.ending_lba = 1023;
lkp.kernel_buffer = kernel_buffer;
lkp.kernel_buffer_size = sizeof(kernel_buffer);
memset(&kbh, 0, sizeof(kbh));
kbh.data_key.key_version = 2;
kbh.key_block_flags = -1;
kbh.key_block_size = sizeof(kbh);
memset(&kph, 0, sizeof(kph));
kph.kernel_version = 1;
kph.preamble_size = 4096 - kbh.key_block_size;
kph.body_signature.data_size = 70000;
kph.bootloader_address = 0xbeadd008;
kph.bootloader_size = 0x1234;
memset(mock_parts, 0, sizeof(mock_parts));
mock_parts[0].start = 100;
mock_parts[0].size = 150; /* 75 KB */
mock_part_next = 0;
}
/* Mocks */
VbError_t VbExDiskRead(VbExDiskHandle_t handle, uint64_t lba_start,
uint64_t lba_count, void *buffer)
{
LOGCALL("VbExDiskRead(h, %d, %d)\n", (int)lba_start, (int)lba_count);
if ((int)lba_start == disk_read_to_fail)
return VBERROR_SIMULATED;
/* Keep valgrind happy */
Memset(buffer, '\0', lba_count);
return VBERROR_SUCCESS;
}
VbError_t VbExDiskWrite(VbExDiskHandle_t handle, uint64_t lba_start,
uint64_t lba_count, const void *buffer)
{
LOGCALL("VbExDiskWrite(h, %d, %d)\n", (int)lba_start, (int)lba_count);
if ((int)lba_start == disk_write_to_fail)
return VBERROR_SIMULATED;
return VBERROR_SUCCESS;
}
int GptInit(GptData *gpt)
{
return gpt_init_fail;
}
int GptNextKernelEntry(GptData *gpt, uint64_t *start_sector, uint64_t *size)
{
struct mock_part *p = mock_parts + mock_part_next;
if (!p->size)
return GPT_ERROR_NO_VALID_KERNEL;
gpt->current_kernel = mock_part_next;
*start_sector = p->start;
*size = p->size;
mock_part_next++;
return GPT_SUCCESS;
}
void GetCurrentKernelUniqueGuid(GptData *gpt, void *dest)
{
static char fake_guid[] = "FakeGuid";
memcpy(dest, fake_guid, sizeof(fake_guid));
}
int KeyBlockVerify(const VbKeyBlockHeader *block, uint64_t size,
const VbPublicKey *key, int hash_only) {
if (hash_only && key_block_verify_fail >= 2)
return VBERROR_SIMULATED;
else if (!hash_only && key_block_verify_fail >= 1)
return VBERROR_SIMULATED;
/* Use this as an opportunity to override the key block */
memcpy((void *)block, &kbh, sizeof(kbh));
return VBERROR_SUCCESS;
}
RSAPublicKey *PublicKeyToRSA(const VbPublicKey *key)
{
TEST_EQ(mock_data_key_allocated, 0, " mock data key not allocated");
if (mock_data_key)
mock_data_key_allocated++;
return mock_data_key;
}
void RSAPublicKeyFree(RSAPublicKey* key)
{
TEST_EQ(mock_data_key_allocated, 1, " mock data key allocated");
TEST_PTR_EQ(key, mock_data_key, " data key ptr");
mock_data_key_allocated--;
}
int VerifyKernelPreamble(const VbKernelPreambleHeader *preamble,
uint64_t size, const RSAPublicKey *key)
{
if (preamble_verify_fail)
return VBERROR_SIMULATED;
/* Use this as an opportunity to override the preamble */
memcpy((void *)preamble, &kph, sizeof(kph));
return VBERROR_SUCCESS;
}
int VerifyData(const uint8_t *data, uint64_t size, const VbSignature *sig,
const RSAPublicKey *key)
{
if (verify_data_fail)
return VBERROR_SIMULATED;
return VBERROR_SUCCESS;
}
/**
* Test reading/writing GPT
*/
static void ReadWriteGptTest(void)
{
GptData g;
GptHeader *h;
g.sector_bytes = 512;
g.drive_sectors = 1024;
ResetMocks();
TEST_EQ(AllocAndReadGptData(handle, &g), 0, "AllocAndRead");
TEST_CALLS("VbExDiskRead(h, 1, 1)\n"
"VbExDiskRead(h, 2, 32)\n"
"VbExDiskRead(h, 991, 32)\n"
"VbExDiskRead(h, 1023, 1)\n");
ResetCallLog();
/*
* Valgrind complains about access to uninitialized memory here, so
* zero the primary header before each test.
*/
Memset(g.primary_header, '\0', g.sector_bytes);
TEST_EQ(WriteAndFreeGptData(handle, &g), 0, "WriteAndFree");
TEST_CALLS("");
/* Data which is changed is written */
ResetMocks();
AllocAndReadGptData(handle, &g);
g.modified |= GPT_MODIFIED_HEADER1 | GPT_MODIFIED_ENTRIES1;
ResetCallLog();
Memset(g.primary_header, '\0', g.sector_bytes);
TEST_EQ(WriteAndFreeGptData(handle, &g), 0, "WriteAndFree mod 1");
TEST_CALLS("VbExDiskWrite(h, 1, 1)\n"
"VbExDiskWrite(h, 2, 32)\n");
/* Data which is changed is written */
ResetMocks();
AllocAndReadGptData(handle, &g);
g.modified = -1;
ResetCallLog();
Memset(g.primary_header, '\0', g.sector_bytes);
TEST_EQ(WriteAndFreeGptData(handle, &g), 0, "WriteAndFree mod all");
TEST_CALLS("VbExDiskWrite(h, 1, 1)\n"
"VbExDiskWrite(h, 2, 32)\n"
"VbExDiskWrite(h, 991, 32)\n"
"VbExDiskWrite(h, 1023, 1)\n");
/* If legacy signature, don't modify GPT header/entries 1 */
ResetMocks();
AllocAndReadGptData(handle, &g);
h = (GptHeader *)g.primary_header;
memcpy(h->signature, GPT_HEADER_SIGNATURE2, GPT_HEADER_SIGNATURE_SIZE);
g.modified = -1;
ResetCallLog();
TEST_EQ(WriteAndFreeGptData(handle, &g), 0, "WriteAndFree mod all");
TEST_CALLS("VbExDiskWrite(h, 991, 32)\n"
"VbExDiskWrite(h, 1023, 1)\n");
/* Error reading */
ResetMocks();
disk_read_to_fail = 1;
TEST_NEQ(AllocAndReadGptData(handle, &g), 0, "AllocAndRead disk fail");
Memset(g.primary_header, '\0', g.sector_bytes);
WriteAndFreeGptData(handle, &g);
ResetMocks();
disk_read_to_fail = 2;
TEST_NEQ(AllocAndReadGptData(handle, &g), 0, "AllocAndRead disk fail");
Memset(g.primary_header, '\0', g.sector_bytes);
WriteAndFreeGptData(handle, &g);
ResetMocks();
disk_read_to_fail = 991;
TEST_NEQ(AllocAndReadGptData(handle, &g), 0, "AllocAndRead disk fail");
Memset(g.primary_header, '\0', g.sector_bytes);
WriteAndFreeGptData(handle, &g);
ResetMocks();
disk_read_to_fail = 1023;
TEST_NEQ(AllocAndReadGptData(handle, &g), 0, "AllocAndRead disk fail");
Memset(g.primary_header, '\0', g.sector_bytes);
WriteAndFreeGptData(handle, &g);
/* Error writing */
ResetMocks();
disk_write_to_fail = 1;
AllocAndReadGptData(handle, &g);
g.modified = -1;
Memset(g.primary_header, '\0', g.sector_bytes);
TEST_NEQ(WriteAndFreeGptData(handle, &g), 0, "WriteAndFree disk fail");
ResetMocks();
disk_write_to_fail = 2;
AllocAndReadGptData(handle, &g);
g.modified = -1;
Memset(g.primary_header, '\0', g.sector_bytes);
TEST_NEQ(WriteAndFreeGptData(handle, &g), 0, "WriteAndFree disk fail");
ResetMocks();
disk_write_to_fail = 991;
AllocAndReadGptData(handle, &g);
g.modified = -1;
Memset(g.primary_header, '\0', g.sector_bytes);
TEST_NEQ(WriteAndFreeGptData(handle, &g), 0, "WriteAndFree disk fail");
ResetMocks();
disk_write_to_fail = 1023;
AllocAndReadGptData(handle, &g);
g.modified = -1;
Memset(g.primary_header, '\0', g.sector_bytes);
TEST_NEQ(WriteAndFreeGptData(handle, &g), 0, "WriteAndFree disk fail");
}
/**
* Trivial invalid calls to LoadKernel()
*/
static void InvalidParamsTest(void)
{
ResetMocks();
lkp.bytes_per_lba = 0;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_PARAMETER,
"Bad lba size");
ResetMocks();
lkp.ending_lba = 0;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_PARAMETER,
"Bad lba count");
ResetMocks();
lkp.bytes_per_lba = 128*1024;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_PARAMETER,
"Huge lba size");
ResetMocks();
disk_read_to_fail = 1;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_NO_KERNEL_FOUND,
"Can't read disk");
ResetMocks();
gpt_init_fail = 1;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_NO_KERNEL_FOUND,
"Bad GPT");
}
static void LoadKernelTest(void)
{
uint32_t u;
ResetMocks();
TEST_EQ(LoadKernel(&lkp, &cparams), 0, "First kernel good");
TEST_EQ(lkp.partition_number, 1, " part num");
TEST_EQ(lkp.bootloader_address, 0xbeadd008, " bootloader addr");
TEST_EQ(lkp.bootloader_size, 0x1234, " bootloader size");
TEST_STR_EQ((char *)lkp.partition_guid, "FakeGuid", " guid");
VbNvGet(&vnc, VBNV_RECOVERY_REQUEST, &u);
TEST_EQ(u, 0, " recovery request");
ResetMocks();
mock_parts[1].start = 300;
mock_parts[1].size = 150;
TEST_EQ(LoadKernel(&lkp, &cparams), 0, "Two good kernels");
TEST_EQ(lkp.partition_number, 1, " part num");
TEST_EQ(mock_part_next, 1, " didn't read second one");
/* Fail if no kernels found */
ResetMocks();
mock_parts[0].size = 0;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_NO_KERNEL_FOUND, "No kernels");
VbNvGet(&vnc, VBNV_RECOVERY_REQUEST, &u);
TEST_EQ(u, VBNV_RECOVERY_RW_NO_OS, " recovery request");
/* Skip kernels which are too small */
ResetMocks();
mock_parts[0].size = 10;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND, "Too small");
VbNvGet(&vnc, VBNV_RECOVERY_REQUEST, &u);
TEST_EQ(u, VBNV_RECOVERY_RW_INVALID_OS, " recovery request");
ResetMocks();
disk_read_to_fail = 100;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Fail reading kernel start");
ResetMocks();
key_block_verify_fail = 1;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Fail key block sig");
/* In dev mode, fail if hash is bad too */
ResetMocks();
lkp.boot_flags |= BOOT_FLAG_DEVELOPER;
key_block_verify_fail = 2;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Fail key block dev hash");
/* But just bad sig is ok */
ResetMocks();
lkp.boot_flags |= BOOT_FLAG_DEVELOPER;
key_block_verify_fail = 1;
TEST_EQ(LoadKernel(&lkp, &cparams), 0, "Succeed key block dev sig");
/* In dev mode and requiring signed kernel, fail if sig is bad */
ResetMocks();
lkp.boot_flags |= BOOT_FLAG_DEVELOPER;
VbNvSet(&vnc, VBNV_DEV_BOOT_SIGNED_ONLY, 1);
VbNvTeardown(&vnc);
key_block_verify_fail = 1;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Fail key block dev sig");
/* Check key block flag mismatches */
ResetMocks();
kbh.key_block_flags =
KEY_BLOCK_FLAG_RECOVERY_0 | KEY_BLOCK_FLAG_DEVELOPER_1;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Key block dev flag mismatch");
ResetMocks();
kbh.key_block_flags =
KEY_BLOCK_FLAG_RECOVERY_1 | KEY_BLOCK_FLAG_DEVELOPER_0;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Key block rec flag mismatch");
ResetMocks();
lkp.boot_flags |= BOOT_FLAG_RECOVERY;
kbh.key_block_flags =
KEY_BLOCK_FLAG_RECOVERY_1 | KEY_BLOCK_FLAG_DEVELOPER_1;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Key block recdev flag mismatch");
ResetMocks();
lkp.boot_flags |= BOOT_FLAG_RECOVERY | BOOT_FLAG_DEVELOPER;
kbh.key_block_flags =
KEY_BLOCK_FLAG_RECOVERY_1 | KEY_BLOCK_FLAG_DEVELOPER_0;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Key block rec!dev flag mismatch");
ResetMocks();
kbh.data_key.key_version = 1;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Key block kernel key rollback");
ResetMocks();
kbh.data_key.key_version = 0x10000;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Key block kernel key version too big");
ResetMocks();
kbh.data_key.key_version = 3;
TEST_EQ(LoadKernel(&lkp, &cparams), 0, "Key block version roll forward");
TEST_EQ(shared->kernel_version_tpm, 0x30001, " shared version");
ResetMocks();
kbh.data_key.key_version = 3;
mock_parts[1].start = 300;
mock_parts[1].size = 150;
TEST_EQ(LoadKernel(&lkp, &cparams), 0, "Two kernels roll forward");
TEST_EQ(mock_part_next, 2, " read both");
TEST_EQ(shared->kernel_version_tpm, 0x30001, " shared version");
ResetMocks();
kbh.data_key.key_version = 1;
lkp.boot_flags |= BOOT_FLAG_DEVELOPER;
TEST_EQ(LoadKernel(&lkp, &cparams), 0, "Key version ignored in dev mode");
ResetMocks();
kbh.data_key.key_version = 1;
lkp.boot_flags |= BOOT_FLAG_RECOVERY;
TEST_EQ(LoadKernel(&lkp, &cparams), 0, "Key version ignored in rec mode");
ResetMocks();
mock_data_key = NULL;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Bad data key");
ResetMocks();
preamble_verify_fail = 1;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Bad preamble");
ResetMocks();
kph.kernel_version = 0;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Kernel version rollback");
ResetMocks();
kph.kernel_version = 0;
lkp.boot_flags |= BOOT_FLAG_DEVELOPER;
TEST_EQ(LoadKernel(&lkp, &cparams), 0, "Kernel version ignored in dev mode");
ResetMocks();
kph.kernel_version = 0;
lkp.boot_flags |= BOOT_FLAG_RECOVERY;
TEST_EQ(LoadKernel(&lkp, &cparams), 0, "Kernel version ignored in rec mode");
ResetMocks();
kph.preamble_size |= 0x07;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Kernel body offset");
/* Check getting kernel load address from header */
ResetMocks();
kph.body_load_address = (size_t)kernel_buffer;
lkp.kernel_buffer = NULL;
TEST_EQ(LoadKernel(&lkp, &cparams), 0, "Get load address from preamble");
TEST_PTR_EQ(lkp.kernel_buffer, kernel_buffer, " address");
/* Size is rounded up to nearest sector */
TEST_EQ(lkp.kernel_buffer_size, 70144, " size");
ResetMocks();
lkp.kernel_buffer_size = 8192;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Kernel too big for buffer");
ResetMocks();
mock_parts[0].size = 130;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Kernel too big for partition");
ResetMocks();
disk_read_to_fail = 108;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND,
"Fail reading kernel data");
ResetMocks();
verify_data_fail = 1;
TEST_EQ(LoadKernel(&lkp, &cparams), VBERROR_INVALID_KERNEL_FOUND, "Bad data");
}
int main(void)
{
ReadWriteGptTest();
InvalidParamsTest();
LoadKernelTest();
return gTestSuccess ? 0 : 255;
}
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