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kf4abl.c
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kf4abl.c
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/*
* Copyright (c) 2016, Intel Corporation
* All rights reserved.
*
* Authors: Jeremy Compostella <[email protected]>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <efi.h>
#include <efiapi.h>
#include <lib.h>
#include <fastboot.h>
#include <vars.h>
#ifdef CRASHMODE_USE_ADB
#include <adb.h>
#endif
#include <hecisupport.h>
#include "options.h"
#if defined(IOC_USE_SLCAN) || defined(IOC_USE_CBC)
#include "ioc_can.h"
#endif
#include "android_vb.h"
#include "android.h"
#include "slot.h"
#include "timer.h"
#include "security.h"
#include "security_interface.h"
#ifdef RPMB_STORAGE
#include <openssl/hkdf.h>
#include "rpmb.h"
#include "rpmb_storage.h"
#endif
#ifdef USE_TRUSTY
#include "trusty_interface.h"
#include "trusty_common.h"
#endif
#include "storage.h"
#include "acpi.h"
#include "ux.h"
typedef union {
uint32_t raw;
struct {
uint32_t patch_M:4;
uint32_t patch_Y:7;
uint32_t version_C:7;
uint32_t version_B:7;
uint32_t version_A:7;
};
} os_version_t;
#define MAX_CMD_BUF 0x1000
static CHAR8 cmd_buf[MAX_CMD_BUF];
struct rot_data_t g_rot_data = {0};
#ifdef CRASHMODE_USE_ADB
static EFI_STATUS enter_crashmode(enum boot_target *target)
{
EFI_STATUS ret;
#ifdef USER
#error "adb in crashmode MUST be disabled on a USER build"
#endif
ret = adb_init();
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to initialize adb");
return ret;
}
debug(L"adb implementation is initialized");
for (;;) {
ret = adb_run();
if (EFI_ERROR(ret))
break;
*target = adb_get_boot_target();
if (*target != UNKNOWN_TARGET)
break;
}
adb_exit();
return ret;
}
#endif
#ifndef __FORCE_FASTBOOT
static enum boot_target check_bcb(CHAR16 **target_path, BOOLEAN *oneshot)
{
EFI_STATUS ret;
struct bootloader_message bcb;
CHAR16 *target = NULL;
enum boot_target t;
CHAR8 *bcb_cmd;
BOOLEAN dirty;
*oneshot = FALSE;
*target_path = NULL;
ret = read_bcb(MISC_LABEL, &bcb);
if (EFI_ERROR(ret)) {
error(L"Unable to read BCB");
t = NORMAL_BOOT;
goto out;
}
dirty = bcb.status[0] != '\0';
/* We own the status field; clear it in case there is any stale data */
bcb.status[0] = '\0';
bcb_cmd = (CHAR8 *)bcb.command;
if (!strncmpa(bcb_cmd, (CHAR8 *)"boot-", 5)) {
target = stra_to_str(bcb_cmd + 5);
debug(L"BCB boot target: '%s'", target);
} else if (!strncmpa(bcb_cmd, (CHAR8 *)"bootonce-", 9)) {
target = stra_to_str(bcb_cmd + 9);
bcb_cmd[0] = '\0';
dirty = TRUE;
debug(L"BCB oneshot boot target: '%s'", target);
*oneshot = TRUE;
}
if (dirty) {
ret = write_bcb(MISC_LABEL, &bcb);
if (EFI_ERROR(ret))
error(L"Unable to update BCB contents!");
}
if (!target) {
t = NORMAL_BOOT;
goto out;
}
t = name_to_boot_target(target);
if (t != UNKNOWN_TARGET && t != CHARGER)
goto out;
error(L"Unknown/Unsupported boot target in BCB: '%s'", target);
t = NORMAL_BOOT;
out:
FreePool(target);
return t;
}
#endif
static EFI_STATUS process_bootimage(void *bootimage, UINTN imagesize)
{
EFI_STATUS ret;
VBDATA *param = NULL;
UINT8 boot_state = BOOT_STATE_GREEN;
enum boot_target target = NORMAL_BOOT;
if (!bootimage)
return EFI_SUCCESS;
#ifndef __FORCE_FASTBOOT
#ifdef USE_AVB
AvbOps *ops;
AvbSlotVerifyData *slot_data = NULL;
#ifndef USE_SLOT
const char *slot_suffix = "";
AvbSlotVerifyResult verify_result;
#else
AvbABFlowResult flow_result;
#endif
const char *requested_partitions[] = {"boot",
#ifdef USE_ACPI
"acpi",
#endif
#ifdef USE_ACPIO
"acpio",
#endif
NULL};
bool allow_verification_error = FALSE;
AvbSlotVerifyFlags flags;
#ifdef USE_TRUSTY
VOID *tosimage = NULL;
#endif
debug(L"Processing boot image");
if (device_is_unlocked()) {
boot_state = BOOT_STATE_ORANGE;
} else if (!is_platform_secure_boot_enabled())
boot_state = BOOT_STATE_YELLOW;
ops = avb_init();
if (ops) {
if (ops->read_is_device_unlocked(ops, &allow_verification_error) != AVB_IO_RESULT_OK) {
avb_fatal("Error determining whether device is unlocked.\n");
return EFI_ABORTED;
}
} else {
return EFI_OUT_OF_RESOURCES;
}
flags = AVB_SLOT_VERIFY_FLAGS_NONE;
if (allow_verification_error) {
flags |= AVB_SLOT_VERIFY_FLAGS_ALLOW_VERIFICATION_ERROR;
}
#ifdef USE_SLOT
flow_result = avb_ab_flow(&ab_ops, requested_partitions, flags, AVB_HASHTREE_ERROR_MODE_RESTART, &slot_data);
ret = get_avb_flow_result(slot_data,
allow_verification_error,
flow_result,
&boot_state);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to get avb slot a/b flow result for boot");
goto fail;
}
slot_set_active_cached(slot_data->ab_suffix);
#else
verify_result = avb_slot_verify(ops,
requested_partitions,
slot_suffix,
flags,
AVB_HASHTREE_ERROR_MODE_RESTART,
&slot_data);
ret = get_avb_result(slot_data,
allow_verification_error,
verify_result,
&boot_state);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to get avb result for boot");
goto fail;
}
#endif
param = slot_data;
ret = android_install_acpi_table_avb(slot_data);
if (EFI_ERROR(ret)) goto fail;
set_boottime_stamp(TM_VERIFY_BOOT_DONE);
#ifdef USE_TRUSTY
ret = get_rot_data(bootimage, boot_state, slot_data, &g_rot_data);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to init rot params");
goto fail;
}
ret = load_tos_image(&tosimage);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Load tos image failed");
goto fail;
}
set_boottime_stamp(TM_LOAD_TOS_DONE);
ret = start_trusty(tosimage);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Unable to start trusty: stop");
goto fail;
}
set_boottime_stamp(TM_PROCRSS_TRUSTY_DONE);
#endif //USE_TRUSTY
fail:
#endif //USE_AVB
#else
//Fastboot stored in the SPI gets the capability to load an image
//(fastboot boot) using the RAMDISK and nothing from the eMMC
target = MEMORY;
#endif //__FORCE_FASTBOOT
/* 'fastboot boot' case, only allowed on unlocked devices.*/
if (device_is_unlocked()) {
UINT32 crc;
ret = uefi_call_wrapper(BS->CalculateCrc32, 3, bootimage, imagesize, &crc);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"CalculateCrc32 failed");
return ret;
}
ret = android_image_start_buffer(NULL, bootimage,
target, boot_state, NULL,
param, (const CHAR8 *)cmd_buf);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Couldn't load Boot image");
return ret;
}
}
return EFI_SUCCESS;
}
static EFI_STATUS enter_fastboot_mode(enum boot_target *target)
{
EFI_STATUS ret;
void *efiimage, *bootimage;
UINTN imagesize;
#if defined(IOC_USE_SLCAN) || defined(IOC_USE_CBC)
ret = notify_ioc_ready();
if (EFI_ERROR(ret)) {
efi_perror(ret, L"notify ioc ready failed");
}
#endif
/* Handle corner case that EOP not send before ABL jump to fastboot, will force EOP send.*/
if (!heci_is_eop_received()) {
heci_end_of_post();
}
for (;;) {
*target = UNKNOWN_TARGET;
bootimage = NULL;
efiimage = NULL;
ret = fastboot_start(&bootimage, &efiimage, &imagesize, target);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Fastboot mode failed");
break;
}
ret = process_bootimage(bootimage, imagesize);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Process bootimage failed");
if (bootimage) {
FreePool(bootimage);
bootimage = NULL;
}
break;
}
if (*target == UNKNOWN_TARGET)
continue;
if (*target == CRASHMODE)
break;
reboot_to_target(*target, EfiResetCold);
}
return ret;
}
/*
* Boot mode field definitions.
*/
static union bootMode
{
UINT16 _bits;
struct {
UINT16 target : 5; /* [4:0] */
UINT16 do_mrc_training : 1; /* [5] */
UINT16 do_save_mrc_data : 1; /* [6] */
UINT16 do_flash_update : 1; /* [7] */
UINT16 silent : 1; /* [8] */
UINT16 _reserved : 1; /* [9] */
UINT16 action : 2; /* [11:10] 0:boot,1:CLI,2:halt,3:reset */
UINT16 dipsw : 4; /* [15:12] */
};
} bootMode;
static enum boot_target check_command_line(EFI_HANDLE image, CHAR8 *cmd_buf, UINTN max_cmd_size)
{
EFI_STATUS ret;
enum boot_target target = FASTBOOT;
static EFI_LOADED_IMAGE *limg;
UINTN argc, i, j;
CHAR16 **argv;
CHAR16 *options;
UINTN cmd_len = 0;
CHAR8 arg8[256] = "";
UINTN arglen;
#if defined(USE_TRUSTY) || defined(RPMB_STORAGE)
UINTN num;
#endif
enum CmdType
{
RESET,
BOOT_TARGET,
BOOT,
TRUSTY_PARAM,
SECUREBOOT,
BOOTVERSION,
SERIALNO,
DEV_SEC_INFO,
IMAGE_BOOT_PARAMS_ADDR,
FIRMWARE_BOOTTIME,
BOOTREASON,
RPMB,
STATUS,
};
struct Cmdline
{
CHAR8 *name;
UINTN length;
enum CmdType type;
};
struct Cmdline CmdlineArray[] = {
{
(CHAR8 *)"ABL.reset=",
strlen((CHAR8 *)"ABL.reset="),
RESET
},
{
(CHAR8 *)"ABL.boot_target=",
strlen((CHAR8 *)"ABL.boot_target="),
BOOT_TARGET
},
{
(CHAR8 *)"ABL.boot=",
strlen((CHAR8 *)"ABL.boot="),
BOOT
},
{
(CHAR8 *)"trusty.param_addr=",
strlen((CHAR8 *)"trusty.param_addr="),
TRUSTY_PARAM
},
{
(CHAR8 *)"ABL.secureboot=",
strlen((CHAR8 *)"ABL.secureboot="),
SECUREBOOT
},
{
(CHAR8 *)"androidboot.bootloader=",
strlen((CHAR8 *)"androidboot.bootloader="),
BOOTVERSION
},
{
(CHAR8 *)"androidboot.bootreason=",
strlen((CHAR8 *)"androidboot.bootreason="),
BOOTREASON
},
{
(CHAR8 *)"androidboot.serialno=",
strlen((CHAR8 *)"androidboot.serialno="),
SERIALNO
},
{
(CHAR8 *)"dev_sec_info.param_addr=",
strlen((CHAR8 *)"dev_sec_info.param_addr="),
DEV_SEC_INFO
},
{
(CHAR8 *)"ABL.svnseed=",
strlen((CHAR8 *)"ABL.svnseed="),
DEV_SEC_INFO
},
{
(CHAR8 *)"ImageBootParamsAddr=",
strlen((CHAR8 *)"ImageBootParamsAddr="),
IMAGE_BOOT_PARAMS_ADDR
},
{
(CHAR8 *)"fw_boottsc=",
strlen("fw_boottsc="),
FIRMWARE_BOOTTIME
},
{
(CHAR8 *)"ABL.rpmb=",
strlen("ABL.rpmb="),
RPMB
},
{
(CHAR8 *)"ABL.status=",
strlen((CHAR8 *)"ABL.status="),
STATUS
},
};
CHAR8 *nptr = NULL;
ret = uefi_call_wrapper(BS->OpenProtocol, 6, image,
&LoadedImageProtocol, (VOID **)&limg,
image, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to open LoadedImageProtocol");
return FASTBOOT;
}
ret = get_argv(limg, &argc, &argv, &options);
if (EFI_ERROR(ret))
return FASTBOOT;
cmd_buf[0] = 0;
for (i = 0; i < argc; i++) {
debug(L" abl cmd %02d: %s", i, argv[i]);
arglen = StrLen(argv[i]);
if (arglen > (int)sizeof(arg8) - 2)
arglen = sizeof(arg8) - 2;
debug(L" abl cmd %02d length: %d", i, arglen);
ret = str_to_stra((CHAR8 *)arg8, argv[i], arglen + 1);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Non-ascii characters in command line");
return FASTBOOT;
}
if (cmd_len + arglen + 1 < max_cmd_size) {
for (j = 0; j < sizeof(CmdlineArray)/sizeof(CmdlineArray[0]); j++) {
if((arglen >= CmdlineArray[j].length) && !strncmp(arg8, CmdlineArray[j].name, CmdlineArray[j].length))
break;
}
if (j < sizeof(CmdlineArray)/sizeof(CmdlineArray[0])) {
switch(CmdlineArray[j].type) {
/* Parse "ABL.reset=xxx" */
case RESET:
set_reboot_reason(argv[i] + CmdlineArray[j].length);
continue;
/* Parse "ABL.boot_target=xxxx" */
case BOOT_TARGET:
nptr = (CHAR8 *)(arg8 + CmdlineArray[j].length);
/* Only handle CRASHMODE case, other mode should be decided by "ABL.boot". */
if (!strcmp(nptr, (CHAR8 *)"CRASHMODE")) {
target = CRASHMODE;
goto out;
}
continue;
/* Parse "ABL.boot=xx" */
case BOOT:
nptr = (CHAR8 *)(arg8 + CmdlineArray[j].length);
bootMode._bits = (UINT16)strtoul((char *)nptr, 0, 16);
target = bootMode.target;
break;
#ifdef USE_TRUSTY
/* Parse "trusty.param_addr=xxxxx" */
case TRUSTY_PARAM:
nptr = (CHAR8 *)(arg8 + CmdlineArray[j].length);
num = strtoul((char *)nptr, 0, 16);
debug(L"Parsed trusty param addr is 0x%x", num);
set_trusty_param((VOID *)num);
continue;
#endif //USE_TRUSTY
#ifdef RPMB_STORAGE
/* Parse "Add legacy DEV_SEC_INFO parameter for backward compatible to ABL usage" */
case DEV_SEC_INFO:
case IMAGE_BOOT_PARAMS_ADDR:
nptr = (CHAR8 *)(arg8 + CmdlineArray[j].length);
num = strtoul((char *)nptr, 0, 16);
debug(L"Parsed device security information addr is 0x%x", num);
set_device_security_info((VOID *)num);
continue;
case RPMB:
nptr = (CHAR8 *)(arg8 + CmdlineArray[j].length);
num = strtoul((char *)nptr, 0, 16);
debug(L"abl_rpmb_key addr is 0x%x", num);
set_rpmb_derived_key_ex((VOID *)num, RPMB_KEY_SIZE, 1, 1);
memset((VOID *)num, 0, RPMB_KEY_SIZE);
continue;
#endif //RPMB_STORAGE
/* Parse "ABL.secureboot=x" */
case SECUREBOOT: {
UINT8 val;
nptr = (CHAR8 *)(arg8 + CmdlineArray[j].length);
val = (UINT8)strtoul((char *)nptr, 0, 10);
ret = set_platform_secure_boot(val);
if (EFI_ERROR(ret))
efi_perror(ret, L"Failed to set secure boot");
break;
}
/* Parse "ABL.status=x" */
case STATUS: {
union
{
struct
{
UINT32 secure_boot:1;
UINT32 measured_boot:1;
UINT32 dci_debug_npk:1;
UINT32 eom:1;
}bit;
UINT32 val;
} abl_status;
nptr = (CHAR8 *)(arg8 + CmdlineArray[j].length);
abl_status.val = (UINT32)strtoul((char *)nptr, 0, 16);
ret = set_platform_secure_boot(abl_status.bit.secure_boot);
if (EFI_ERROR(ret))
efi_perror(ret, L"Failed to set secure boot");
break;
}
/* Parse "fw_boottsc=xxxxx" */
case FIRMWARE_BOOTTIME: {
UINT64 VALUE;
UINT32 cpu_khz;
nptr = (CHAR8 *)(arg8 + CmdlineArray[j].length);
VALUE = (UINT64)strtoull((char *)nptr, 0, 10);
cpu_khz = get_cpu_freq() * 1000;
//EFI_ENTER_POINT boot time is recorded in ms
set_efi_enter_point(VALUE /cpu_khz);
continue;
}
/* Parse "android.bootloader=xxxxx" */
case BOOTVERSION:
continue;
/* Parse "android.serialno=xxxxx " */
case SERIALNO:
continue;
/* Parse "androidboot.bootreason=xxxxx " */
case BOOTREASON:
continue;
default:
continue;
}
}
if (cmd_buf[0] != 0) {
strncpy((CHAR8 *)(cmd_buf + cmd_len), (const CHAR8 *)" ", 1);
cmd_len++;
}
strncpy((CHAR8 *)(cmd_buf + cmd_len), (const CHAR8 *)arg8, arglen);
cmd_len += arglen;
}
}
out:
debug(L"boot target: %d", target);
FreePool(argv);
FreePool(options);
return target;
}
static EFI_STATUS start_boot_image(VOID *bootimage, UINT8 boot_state,
enum boot_target boot_target,
VBDATA *vb_data,
CHAR8 *abl_cmd_line)
{
EFI_STATUS ret;
#ifdef USER
/* per bootloaderequirements.pdf */
if (boot_state == BOOT_STATE_ORANGE) {
ret = android_clear_memory();
if (EFI_ERROR(ret)) {
error(L"Failed to clear memory. Load image aborted.");
return ret;
}
}
#endif
#ifdef USER
if (boot_state == BOOT_STATE_RED) {
if (is_platform_secure_boot_enabled()) {
return EFI_SECURITY_VIOLATION;
}
}
#endif
set_efi_variable(&fastboot_guid, BOOT_STATE_VAR, sizeof(boot_state),
&boot_state, FALSE, TRUE);
#ifdef OS_SECURE_BOOT
ret = set_os_secure_boot(boot_state == BOOT_STATE_GREEN);
if (EFI_ERROR(ret))
efi_perror(ret, L"Failed to set os secure boot");
#endif
if (!use_slot()) {
ret = slot_boot(boot_target);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to write slot boot");
return ret;
}
}
debug(L"chainloading boot image, boot state is %s\n",
boot_state_to_string(boot_state));
ret = android_image_start_buffer(NULL, bootimage,
boot_target, boot_state, NULL,
vb_data, (const CHAR8 *)abl_cmd_line);
if (EFI_ERROR(ret))
efi_perror(ret, L"Couldn't load Boot image");
ret = slot_boot_failed(boot_target);
if (EFI_ERROR(ret))
efi_perror(ret, L"Failed to write slot failure");
return ret;
}
#ifdef USE_AVB
EFI_STATUS avb_boot_android(enum boot_target boot_target, CHAR8 *abl_cmd_line)
{
AvbOps *ops;
AvbSlotVerifyData *slot_data = NULL;
#ifndef USE_SLOT
const char *slot_suffix = "";
AvbSlotVerifyResult verify_result;
#else
AvbABFlowResult flow_result;
#endif
const char *requested_partitions[] = {"boot",
#ifdef USE_ACPI
"acpi",
#endif
#ifdef USE_ACPIO
"acpio",
#endif
NULL};
EFI_STATUS ret;
VOID *bootimage = NULL;
UINT8 boot_state = BOOT_STATE_GREEN;
bool allow_verification_error = FALSE;
AvbSlotVerifyFlags flags;
const uint8_t *vbmeta_pub_key;
UINTN vbmeta_pub_key_len;
debug(L"Loading boot image");
if (!use_slot()) {
if (boot_target == RECOVERY) {
requested_partitions[0] = "recovery";
}
}
if (device_is_unlocked()) {
boot_state = BOOT_STATE_ORANGE;
} else if (!is_platform_secure_boot_enabled())
boot_state = BOOT_STATE_YELLOW;
ops = avb_init();
if (ops) {
if (ops->read_is_device_unlocked(ops, &allow_verification_error) != AVB_IO_RESULT_OK) {
avb_fatal("Error determining whether device is unlocked.\n");
return EFI_ABORTED;
}
} else {
return EFI_OUT_OF_RESOURCES;
}
flags = AVB_SLOT_VERIFY_FLAGS_NONE;
if (allow_verification_error) {
flags |= AVB_SLOT_VERIFY_FLAGS_ALLOW_VERIFICATION_ERROR;
}
#ifdef USE_SLOT
flow_result = avb_ab_flow(&ab_ops, requested_partitions, flags, AVB_HASHTREE_ERROR_MODE_RESTART, &slot_data);
ret = get_avb_flow_result(slot_data,
allow_verification_error,
flow_result,
&boot_state);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to get avb slot a/b flow result for boot");
goto fail;
}
slot_set_active_cached(slot_data->ab_suffix);
if (slot_data->ab_suffix) {
CHAR8 *capsule_buf;
UINTN capsule_buf_len = 0;
CHAR16 *AB_SUFFIX = NULL;
CHAR16 *ABL_AB_SUFFIX = NULL;
AB_SUFFIX = stra_to_str((const CHAR8 *)slot_data->ab_suffix);
if (!AB_SUFFIX) {
error(L"Cannot get a valid AVB flow suffix: %s", slot_data->ab_suffix);
goto fail;
}
ABL_AB_SUFFIX = stra_to_str((const CHAR8 *)abl_cmd_line);
if (!ABL_AB_SUFFIX) {
error(L"Cannot get a valid ABL suffix: %s", abl_cmd_line);
goto fail;
}
if (!(StrStr(ABL_AB_SUFFIX, L"ABL.suffix"))) {
debug(L"ABL.suffix is null");
} else if (!(StrCmp(AB_SUFFIX, L"_a")) && (!(StrStr(ABL_AB_SUFFIX, L"ABL.suffix=0")))) {
capsule_buf = (CHAR8 *)"m1:@0";
capsule_buf_len = strlen(capsule_buf);
} else if (!(StrCmp(AB_SUFFIX, L"_b")) && (!(StrStr(ABL_AB_SUFFIX, L"ABL.suffix=1")))) {
capsule_buf = (CHAR8 *)"m2:@0";
capsule_buf_len = strlen(capsule_buf);
}
if (capsule_buf_len != 0 ) {
error(L"Avb flow suffix %a doesn't equal to ABL suffix, reboot and update ABL.", slot_data->ab_suffix);
ret = set_efi_variable(&loader_guid, IFWI_CAPSULE_UPDATE, capsule_buf_len + 1,
capsule_buf, TRUE, TRUE);
if (EFI_ERROR(ret)) {
error(L"Unable to set slot %a into %a", slot_data->ab_suffix, IFWI_CAPSULE_UPDATE);
goto fail;
}
reboot_to_target(NORMAL_BOOT, EfiResetCold);
}
}
#else
verify_result = avb_slot_verify(ops,
requested_partitions,
slot_suffix,
flags,
AVB_HASHTREE_ERROR_MODE_RESTART,
&slot_data);
ret = get_avb_result(slot_data,
allow_verification_error,
verify_result,
&boot_state);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to get avb result for boot");
goto fail;
}
#endif
ret = android_query_image_from_avb_result(slot_data, "boot", &bootimage);
if (EFI_ERROR(ret)) {
avb_error("Cannot find android image partition!\n");
goto fail;
}
ret = android_install_acpi_table_avb(slot_data);
if (EFI_ERROR(ret)) goto fail;
ret = avb_vbmeta_image_verify(slot_data->vbmeta_images[0].vbmeta_data,
slot_data->vbmeta_images[0].vbmeta_size,
&vbmeta_pub_key,
&vbmeta_pub_key_len);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to get the vbmeta_pub_key");
goto fail;
}
ret = get_rot_data(bootimage, boot_state, slot_data, &g_rot_data);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to init rot params");
goto fail;
}
set_boottime_stamp(TM_VERIFY_BOOT_DONE);
/* install acpi tables before starting trusty */
ret = setup_acpi_table(bootimage, boot_target);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"setup_acpi_table");
return ret;
}
#ifdef USE_TRUSTY
if (boot_target == NORMAL_BOOT) {
VOID *tosimage = NULL;
ret = load_tos_image(&tosimage);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Load tos image failed");
goto fail;
}
set_boottime_stamp(TM_LOAD_TOS_DONE);
ret = start_trusty(tosimage);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Unable to start trusty: stop");
goto fail;
}
set_boottime_stamp(TM_PROCRSS_TRUSTY_DONE);
}
#endif
if (boot_state == BOOT_STATE_GREEN) {
avb_update_stored_rollback_indexes_for_slot(ops, slot_data);
}
ret = start_boot_image(bootimage, boot_state, boot_target, slot_data, abl_cmd_line);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to start boot image");
goto fail;
}
fail:
if (slot_data)
avb_slot_verify_data_free(slot_data);
return ret;
}
#endif
#ifndef USE_AVB
/* Load a boot image into RAM.
*
* boot_target - Boot image to load. Values supported are NORMAL_BOOT, RECOVERY,
* and ESP_BOOTIMAGE (for 'fastboot boot')
* target_path - Path to load boot image from for ESP_BOOTIMAGE case, ignored
* otherwise.
* bootimage - Returned allocated pointer value for the loaded boot image.
* oneshot - For ESP_BOOTIMAGE case, flag indicating that the image should
* be deleted.
*
* Return values:
* EFI_INVALID_PARAMETER - Unsupported boot target type, key is not well-formed,
* or loaded boot image was missing or corrupt
* EFI_ACCESS_DENIED - Validation failed against OEM or embedded certificate,
* boot image still usable
*/
static EFI_STATUS load_boot_image(
IN enum boot_target boot_target,
IN CHAR16 *target_path,
OUT VOID **bootimage,
IN BOOLEAN oneshot)
{
EFI_STATUS ret;
switch (boot_target) {
case NORMAL_BOOT:
ret = EFI_NOT_FOUND;
if (use_slot() && !slot_get_active())
break;
do {
const CHAR16 *label = slot_label(BOOT_LABEL);
ret = android_image_load_partition(label, bootimage);
if (EFI_ERROR(ret)) {
efi_perror(ret, L"Failed to load boot image from %s partition",
label);
if (use_slot())
slot_boot_failed(boot_target);
}
} while (EFI_ERROR(ret) && slot_get_active());
break;
case RECOVERY:
if (recovery_in_boot_partition()) {
ret = load_boot_image(NORMAL_BOOT, target_path, bootimage, oneshot);
break;
}
if (use_slot() && !slot_recovery_tries_remaining()) {
ret = EFI_NOT_FOUND;
break;
}
ret = android_image_load_partition(RECOVERY_LABEL, bootimage);
break;
default:
*bootimage = NULL;
return EFI_INVALID_PARAMETER;
}
if (!EFI_ERROR(ret))
debug(L"boot image loaded");
return ret;
}
/* Validate an image.
*
* Parameters:
* boot_target - Boot image to load. Values supported are NORMAL_BOOT,
* RECOVERY, and ESP_BOOTIMAGE (for 'fastboot boot')
* bootimage - Bootimage to validate
* verifier_cert - Return the certificate that validated the boot image
*
* Return values:
* BOOT_STATE_GREEN - Boot image is valid against provided certificate
* BOOT_STATE_YELLOW - Boot image is valid against embedded certificate
* BOOT_STATE_RED - Boot image is not valid
*/
static UINT8 validate_bootimage(
IN enum boot_target boot_target,
IN VOID *bootimage,
OUT X509 **verifier_cert)
{
CHAR16 target[BOOT_TARGET_SIZE];
CHAR16 *expected;
CHAR16 *expected2 = NULL;
UINT8 boot_state;
boot_state = verify_android_boot_image(bootimage, oem_cert,
oem_cert_size, target,
verifier_cert);
if (boot_state == BOOT_STATE_RED) {
error(L"boot image doesn't verify");
return boot_state;
}
switch (boot_target) {
case NORMAL_BOOT:
expected = L"/boot";