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Code Issues Releases Wiki Activity

feat(core): implement syscall verifiers

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[no changelog]
This commit is contained in:
cepetr 2024-09-26 12:55:37 +02:00 committed by cepetr
parent 93af056c13
commit 63f5f72804
16 changed files with 1091 additions and 65 deletions
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19
core/embed/kernel/main.c
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@ -183,10 +183,21 @@ static void coreapp_init(applet_t *applet) {
(applet_header_t *)COREAPP_CODE_ALIGN(KERNEL_START + KERNEL_SIZE);
applet_layout_t coreapp_layout = {
.data1_start = (uint32_t)&_coreapp_clear_ram_0_start,
.data1_size = (uint32_t)&_coreapp_clear_ram_0_size,
.data2_start = (uint32_t)&_coreapp_clear_ram_1_start,
.data2_size = (uint32_t)&_coreapp_clear_ram_1_size,
.data1.start = (uint32_t)&_coreapp_clear_ram_0_start,
.data1.size = (uint32_t)&_coreapp_clear_ram_0_size,
.data2.start = (uint32_t)&_coreapp_clear_ram_1_start,
.data2.size = (uint32_t)&_coreapp_clear_ram_1_size,
#ifdef FIRMWARE_P1_START
.code1.start = FIRMWARE_P1_START + KERNEL_SIZE,
.code1.size = FIRMWARE_P1_MAXSIZE - KERNEL_SIZE,
.code2.start = FIRMWARE_P2_START,
.code2.size = FIRMWARE_P2_MAXSIZE,
#else
.code1.start = FIRMWARE_START + KERNEL_SIZE,
.code1.size = FIRMWARE_MAXSIZE - KERNEL_SIZE,
.code2.start = 0,
.code2.size = 0,
#endif
};
applet_init(applet, coreapp_header, &coreapp_layout);

27
core/embed/trezorhal/applet.h
View File

@ -30,23 +30,29 @@
// Applet entry point
typedef void (*applet_startup_t)(const char* args, uint32_t random);
typedef struct {
uint32_t start;
uint32_t size;
} memory_area_t;
// Applet header found at the beginning of the applet binary
typedef struct {
// Stack area
uint32_t stack_start;
uint32_t stack_size;
memory_area_t stack;
// Applet entry point
applet_startup_t startup;
} applet_header_t;
// Applet memory layout
typedef struct {
// Data area 1
uint32_t data1_start;
uint32_t data1_size;
// Data area 2
uint32_t data2_start;
uint32_t data2_size;
// Read/write data area #1
memory_area_t data1;
// Read/write data area #2
memory_area_t data2;
// Read-only code area #1
memory_area_t code1;
// Read-only code area #2
memory_area_t code2;
} applet_layout_t;
@ -76,6 +82,11 @@ void applet_init(applet_t* applet, applet_header_t* header,
bool applet_reset(applet_t* applet, uint32_t cmd, const void* arg,
size_t arg_size);
// Returns the currently active applet.
//
// Returns `NULL` if no applet is currently active.
applet_t* applet_active(void);
#endif // SYSCALL_DISPATCH
#endif // TREZORHAL_APPLET_H

22
core/embed/trezorhal/stm32f4/applet.c
View File

@ -35,11 +35,11 @@ void applet_init(applet_t* applet, applet_header_t* header,
}
static void applet_clear_memory(applet_t* applet) {
if (applet->layout.data1_size > 0) {
memset((void*)applet->layout.data1_start, 0, applet->layout.data1_size);
if (applet->layout.data1.size > 0) {
memset((void*)applet->layout.data1.start, 0, applet->layout.data1.size);
}
if (applet->layout.data2_size > 0) {
memset((void*)applet->layout.data2_start, 0, applet->layout.data2_size);
if (applet->layout.data2.size > 0) {
memset((void*)applet->layout.data2.start, 0, applet->layout.data2.size);
}
}
@ -49,8 +49,8 @@ bool applet_reset(applet_t* applet, uint32_t cmd, const void* arg,
applet_clear_memory(applet);
// Reset the applet task (stack pointer, etc.)
systask_init(&applet->task, applet->header->stack_start,
applet->header->stack_size);
systask_init(&applet->task, applet->header->stack.start,
applet->header->stack.size, applet);
// Copy the arguments onto the applet stack
void* arg_copy = NULL;
@ -70,4 +70,14 @@ bool applet_reset(applet_t* applet, uint32_t cmd, const void* arg,
arg3);
}
applet_t* applet_active(void) {
systask_t* task = systask_active();
if (task == NULL) {
return NULL;
}
return (applet_t*)task->applet;
}
#endif // SYSCALL_DISPATCH

92
core/embed/trezorhal/stm32f4/syscall_dispatch.c
View File

@ -46,6 +46,8 @@
#include "usb_vcp.h"
#include "usb_webusb.h"
#include "syscall_verifiers.h"
#ifdef SYSCALL_DISPATCH
static PIN_UI_WAIT_CALLBACK storage_init_callback = NULL;
@ -68,31 +70,28 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint32_t syscall) {
switch (syscall) {
case SYSCALL_SYSTEM_EXIT: {
systask_t *task = systask_active();
int exit_code = (int)args[0];
systask_exit(task, exit_code);
system_exit__verified(exit_code);
} break;
case SYSCALL_SYSTEM_EXIT_ERROR: {
systask_t *task = systask_active();
const char *title = (const char *)args[0];
size_t title_len = (size_t)args[1];
const char *message = (const char *)args[2];
size_t message_len = (size_t)args[3];
const char *footer = (const char *)args[4];
size_t footer_len = (size_t)args[5];
systask_exit_error(task, title, title_len, message, message_len, footer,
footer_len);
system_exit_error__verified(title, title_len, message, message_len,
footer, footer_len);
} break;
case SYSCALL_SYSTEM_EXIT_FATAL: {
systask_t *task = systask_active();
const char *message = (const char *)args[0];
size_t message_len = (size_t)args[1];
const char *file = (const char *)args[2];
size_t file_len = (size_t)args[3];
int line = (int)args[4];
systask_exit_fatal(task, message, message_len, file, file_len, line);
system_exit_fatal__verified(message, message_len, file, file_len, line);
} break;
case SYSCALL_SYSTICK_CYCLES: {
@ -123,7 +122,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
} break;
case SYSCALL_REBOOT_DEVICE: {
reboot();
reboot_device();
} break;
case SYSCALL_REBOOT_TO_BOOTLOADER: {
@ -132,7 +131,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
case SYSCALL_REBOOT_AND_UPGRADE: {
const uint8_t *hash = (const uint8_t *)args[0];
reboot_and_upgrade(hash);
reboot_and_upgrade__verified(hash);
} break;
case SYSCALL_DISPLAY_SET_BACKLIGHT: {
@ -156,7 +155,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
#if XFRAMEBUFFER
case SYSCALL_DISPLAY_GET_FB_INFO: {
display_fb_info_t *fb = (display_fb_info_t *)args[0];
args[0] = (uint32_t)display_get_frame_buffer(fb);
args[0] = (uint32_t)display_get_frame_buffer__verified(fb);
} break;
#else
case SYSCALL_DISPLAY_WAIT_FOR_SYNC: {
@ -166,13 +165,13 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
case SYSCALL_DISPLAY_FILL: {
const gfx_bitblt_t *bb = (const gfx_bitblt_t *)args[0];
display_fill(bb);
display_fill__verified(bb);
} break;
#ifdef USE_RGB_COLORS
case SYSCALL_DISPLAY_COPY_RGB565: {
const gfx_bitblt_t *bb = (const gfx_bitblt_t *)args[0];
display_copy_rgb565(bb);
display_copy_rgb565__verified(bb);
} break;
#endif
@ -220,14 +219,14 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint8_t iface_num = (uint8_t)args[0];
uint8_t *buf = (uint8_t *)args[1];
uint32_t len = args[2];
args[0] = usb_hid_read(iface_num, buf, len);
args[0] = usb_hid_read__verified(iface_num, buf, len);
} break;
case SYSCALL_USB_HID_WRITE: {
uint8_t iface_num = (uint8_t)args[0];
const uint8_t *buf = (const uint8_t *)args[1];
uint32_t len = args[2];
args[0] = usb_hid_write(iface_num, buf, len);
args[0] = usb_hid_write__verified(iface_num, buf, len);
} break;
case SYSCALL_USB_HID_READ_SELECT: {
@ -240,7 +239,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint8_t *buf = (uint8_t *)args[1];
uint32_t len = args[2];
int timeout = (int)args[3];
args[0] = usb_hid_read_blocking(iface_num, buf, len, timeout);
args[0] = usb_hid_read_blocking__verified(iface_num, buf, len, timeout);
} break;
case SYSCALL_USB_HID_WRITE_BLOCKING: {
@ -248,7 +247,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
const uint8_t *buf = (const uint8_t *)args[1];
uint32_t len = args[2];
int timeout = (int)args[3];
args[0] = usb_hid_write_blocking(iface_num, buf, len, timeout);
args[0] = usb_hid_write_blocking__verified(iface_num, buf, len, timeout);
} break;
case SYSCALL_USB_VCP_ADD: {
@ -270,14 +269,14 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint8_t iface_num = (uint8_t)args[0];
uint8_t *buf = (uint8_t *)args[1];
uint32_t len = args[2];
args[0] = usb_vcp_read(iface_num, buf, len);
args[0] = usb_vcp_read__verified(iface_num, buf, len);
} break;
case SYSCALL_USB_VCP_WRITE: {
uint8_t iface_num = (uint8_t)args[0];
const uint8_t *buf = (const uint8_t *)args[1];
uint32_t len = args[2];
args[0] = usb_vcp_write(iface_num, buf, len);
args[0] = usb_vcp_write__verified(iface_num, buf, len);
} break;
case SYSCALL_USB_VCP_READ_BLOCKING: {
@ -285,7 +284,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint8_t *buf = (uint8_t *)args[1];
uint32_t len = args[2];
int timeout = (int)args[3];
args[0] = usb_vcp_read_blocking(iface_num, buf, len, timeout);
args[0] = usb_vcp_read_blocking__verified(iface_num, buf, len, timeout);
} break;
case SYSCALL_USB_VCP_WRITE_BLOCKING: {
@ -293,7 +292,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
const uint8_t *buf = (const uint8_t *)args[1];
uint32_t len = args[2];
int timeout = (int)args[3];
args[0] = usb_vcp_write_blocking(iface_num, buf, len, timeout);
args[0] = usb_vcp_write_blocking__verified(iface_num, buf, len, timeout);
} break;
case SYSCALL_USB_WEBUSB_ADD: {
@ -315,14 +314,14 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint8_t iface_num = (uint8_t)args[0];
uint8_t *buf = (uint8_t *)args[1];
uint32_t len = args[2];
args[0] = usb_webusb_read(iface_num, buf, len);
args[0] = usb_webusb_read__verified(iface_num, buf, len);
} break;
case SYSCALL_USB_WEBUSB_WRITE: {
uint8_t iface_num = (uint8_t)args[0];
const uint8_t *buf = (const uint8_t *)args[1];
uint32_t len = args[2];
args[0] = usb_webusb_write(iface_num, buf, len);
args[0] = usb_webusb_write__verified(iface_num, buf, len);
} break;
case SYSCALL_USB_WEBUSB_READ_SELECT: {
@ -335,7 +334,8 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint8_t *buf = (uint8_t *)args[1];
uint32_t len = args[2];
int timeout = (int)args[3];
args[0] = usb_webusb_read_blocking(iface_num, buf, len, timeout);
args[0] =
usb_webusb_read_blocking__verified(iface_num, buf, len, timeout);
} break;
case SYSCALL_USB_WEBUSB_WRITE_BLOCKING: {
@ -343,7 +343,8 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
const uint8_t *buf = (const uint8_t *)args[1];
uint32_t len = args[2];
int timeout = (int)args[3];
args[0] = usb_webusb_write_blocking(iface_num, buf, len, timeout);
args[0] =
usb_webusb_write_blocking__verified(iface_num, buf, len, timeout);
} break;
#ifdef USE_SD_CARD
@ -367,14 +368,14 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint32_t *dest = (uint32_t *)args[0];
uint32_t block_num = args[1];
uint32_t num_blocks = args[2];
args[0] = sdcard_read_blocks(dest, block_num, num_blocks);
args[0] = sdcard_read_blocks__verified(dest, block_num, num_blocks);
} break;
case SYSCALL_SDCARD_WRITE_BLOCKS: {
const uint32_t *src = (const uint32_t *)args[0];
uint32_t block_num = args[1];
uint32_t num_blocks = args[2];
args[0] = sdcard_write_blocks(src, block_num, num_blocks);
args[0] = sdcard_write_blocks__verified(src, block_num, num_blocks);
} break;
#endif
@ -445,7 +446,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
case SYSCALL_OPTIGA_CERT_SIZE: {
uint8_t index = args[0];
size_t *cert_size = (size_t *)args[1];
args[0] = optiga_cert_size(index, cert_size);
args[0] = optiga_cert_size__verified(index, cert_size);
} break;
case SYSCALL_OPTIGA_READ_CERT: {
@ -453,18 +454,19 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint8_t *cert = (uint8_t *)args[1];
size_t max_cert_size = args[2];
size_t *cert_size = (size_t *)args[3];
args[0] = optiga_read_cert(index, cert, max_cert_size, cert_size);
args[0] =
optiga_read_cert__verified(index, cert, max_cert_size, cert_size);
} break;
case SYSCALL_OPTIGA_READ_SEC: {
uint8_t *sec = (uint8_t *)args[0];
args[0] = optiga_read_sec(sec);
args[0] = optiga_read_sec__verified(sec);
} break;
case SYSCALL_OPTIGA_RANDOM_BUFFER: {
uint8_t *dest = (uint8_t *)args[0];
size_t size = args[1];
args[0] = optiga_random_buffer(dest, size);
args[0] = optiga_random_buffer__verified(dest, size);
} break;
#if PYOPT == 0
@ -479,7 +481,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
const uint8_t *salt = (const uint8_t *)args[1];
uint16_t salt_len = args[2];
mpu_reconfig(MPU_MODE_STORAGE);
storage_init(storage_init_callback_wrapper, salt, salt_len);
storage_init__verified(storage_init_callback_wrapper, salt, salt_len);
} break;
case SYSCALL_STORAGE_WIPE: {
@ -502,7 +504,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
size_t pin_len = args[1];
const uint8_t *ext_salt = (const uint8_t *)args[2];
mpu_reconfig(MPU_MODE_STORAGE);
args[0] = storage_unlock(pin, pin_len, ext_salt);
args[0] = storage_unlock__verified(pin, pin_len, ext_salt);
} break;
case SYSCALL_STORAGE_HAS_PIN: {
@ -528,15 +530,15 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
const uint8_t *old_ext_salt = (const uint8_t *)args[4];
const uint8_t *new_ext_salt = (const uint8_t *)args[5];
mpu_reconfig(MPU_MODE_STORAGE);
args[0] = storage_change_pin(oldpin, oldpin_len, newpin, newpin_len,
old_ext_salt, new_ext_salt);
args[0] = storage_change_pin__verified(
oldpin, oldpin_len, newpin, newpin_len, old_ext_salt, new_ext_salt);
} break;
case SYSCALL_STORAGE_ENSURE_NOT_WIPE_CODE: {
const uint8_t *pin = (const uint8_t *)args[0];
size_t pin_len = args[1];
mpu_reconfig(MPU_MODE_STORAGE);
storage_ensure_not_wipe_code(pin, pin_len);
storage_ensure_not_wipe_code__verified(pin, pin_len);
} break;
case SYSCALL_STORAGE_HAS_WIPE_CODE: {
@ -551,8 +553,8 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
const uint8_t *wipe_code = (const uint8_t *)args[3];
size_t wipe_code_len = args[4];
mpu_reconfig(MPU_MODE_STORAGE);
args[0] = storage_change_wipe_code(pin, pin_len, ext_salt, wipe_code,
wipe_code_len);
args[0] = storage_change_wipe_code__verified(pin, pin_len, ext_salt,
wipe_code, wipe_code_len);
} break;
case SYSCALL_STORAGE_HAS: {
@ -567,7 +569,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint16_t max_len = (uint16_t)args[2];
uint16_t *len = (uint16_t *)args[3];
mpu_reconfig(MPU_MODE_STORAGE);
args[0] = storage_get(key, val, max_len, len);
args[0] = storage_get__verified(key, val, max_len, len);
} break;
case SYSCALL_STORAGE_SET: {
@ -575,7 +577,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
const void *val = (const void *)args[1];
uint16_t len = (uint16_t)args[2];
mpu_reconfig(MPU_MODE_STORAGE);
args[0] = storage_set(key, val, len);
args[0] = storage_set__verified(key, val, len);
} break;
case SYSCALL_STORAGE_DELETE: {
@ -595,12 +597,12 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
uint16_t key = (uint16_t)args[0];
uint32_t *count = (uint32_t *)args[1];
mpu_reconfig(MPU_MODE_STORAGE);
args[0] = storage_next_counter(key, count);
args[0] = storage_next_counter__verified(key, count);
} break;
case SYSCALL_ENTROPY_GET: {
uint8_t *buf = (uint8_t *)args[0];
entropy_get(buf);
entropy_get__verified(buf);
} break;
case SYSCALL_TRANSLATIONS_WRITE: {
@ -631,7 +633,7 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
case SYSCALL_FIRMWARE_GET_VENDOR: {
char *buff = (char *)args[0];
size_t buff_size = args[1];
args[0] = firmware_get_vendor(buff, buff_size);
args[0] = firmware_get_vendor__verified(buff, buff_size);
} break;
case SYSCALL_FIRMWARE_CALC_HASH: {
@ -642,9 +644,9 @@ __attribute((no_stack_protector)) void syscall_handler(uint32_t *args,
firmware_hash_callback = (firmware_hash_callback_t)args[4];
void *callback_context = (void *)args[5];
args[0] =
firmware_calc_hash(challenge, challenge_len, hash, hash_len,
firmware_hash_callback_wrapper, callback_context);
args[0] = firmware_calc_hash__verified(
challenge, challenge_len, hash, hash_len,
firmware_hash_callback_wrapper, callback_context);
} break;
default:

103
core/embed/trezorhal/stm32f4/syscall_probe.c Normal file
View File

@ -0,0 +1,103 @@
/*
* This file is part of the Trezor project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "syscall_probe.h"
#include "applet.h"
#include "model.h"
#ifdef SYSCALL_DISPATCH
static inline bool inside_area(const void *addr, size_t len,
const memory_area_t *area) {
return ((uintptr_t)addr >= area->start) &&
((uintptr_t)addr + len <= area->start + area->size);
}
bool probe_read_access(const void *addr, size_t len) {
applet_t *applet = applet_active();
if (applet == NULL) {
return false;
}
if (addr == NULL) {
return true;
}
// Address overflow check
if ((uintptr_t)addr + len < (uintptr_t)addr) {
return false;
}
if (inside_area(addr, len, &applet->layout.data1)) {
return true;
}
if (inside_area(addr, len, &applet->layout.data2)) {
return true;
}
if (inside_area(addr, len, &applet->layout.code1)) {
return true;
}
if (inside_area(addr, len, &applet->layout.code2)) {
return true;
}
static const memory_area_t assets = {
.start = ASSETS_START,
.size = ASSETS_MAXSIZE,
};
if (inside_area(addr, len, &assets)) {
return true;
}
return false;
}
bool probe_write_access(void *addr, size_t len) {
applet_t *applet = applet_active();
if (applet == NULL) {
return false;
}
if (addr == NULL) {
return true;
}
// Address overflow check
if ((uintptr_t)addr + len < (uintptr_t)addr) {
return false;
}
if (inside_area(addr, len, &applet->layout.data1)) {
return true;
}
if (inside_area(addr, len, &applet->layout.data2)) {
return true;
}
return false;
}
#endif // SYSCALL_DISPATCH

47
core/embed/trezorhal/stm32f4/syscall_probe.h Normal file
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@ -0,0 +1,47 @@
/*
* This file is part of the Trezor project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TREZORHAL_SYSCALL_PROBE_H
#define TREZORHAL_SYSCALL_PROBE_H
#include <stdbool.h>
#include <stddef.h>
#include "system.h"
#ifdef SYSCALL_DISPATCH
// Checks if the current application task has read access to the
// given memory range.
bool probe_read_access(const void *addr, size_t len);
// Checks if the current application task has write access to the
// given memory range.
bool probe_write_access(void *addr, size_t len);
// Exits the current application task with an fatal error
// with the message "Access violation".
#define apptask_access_violation() \
do { \
system_exit_fatal("Access violation", __FILE__, __LINE__); \
} while (0)
#endif // SYSCALL_DISPATCH
#endif // TREZORHAL_SYSCALL_PROBE_H

660
core/embed/trezorhal/stm32f4/syscall_verifiers.c Normal file
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@ -0,0 +1,660 @@
/*
* This file is part of the Trezor project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "common.h"
#include "syscall_probe.h"
#include "syscall_verifiers.h"
#include "systask.h"
#ifdef SYSCALL_DISPATCH
// ---------------------------------------------------------------------
void system_exit__verified(int exit_code) {
systask_t *task = systask_active();
systask_exit(task, exit_code);
}
void system_exit_error__verified(const char *title, size_t title_len,
const char *message, size_t message_len,
const char *footer, size_t footer_len) {
char title_copy[64] = {0};
char message_copy[64] = {0};
char footer_copy[64] = {0};
if (title != NULL) {
if (!probe_read_access(title, title_len)) {
goto access_violation;
}
title_len = MIN(title_len, sizeof(title_copy) - 1);
title = strncpy(title_copy, title, title_len);
} else {
title_len = 0;
}
if (message != NULL) {
if (!probe_read_access(message, message_len)) {
goto access_violation;
}
message_len = MIN(message_len, sizeof(message_copy) - 1);
message = strncpy(message_copy, message, message_len);
} else {
message_len = 0;
}
if (footer != NULL) {
if (!probe_read_access(footer, footer_len)) {
goto access_violation;
}
footer_len = MIN(footer_len, sizeof(footer_copy) - 1);
footer = strncpy(footer_copy, footer, footer_len);
} else {
footer_len = 0;
}
systask_t *task = systask_active();
systask_exit_error(task, title, title_len, message, message_len, footer,
footer_len);
return;
access_violation:
apptask_access_violation();
}
void system_exit_fatal__verified(const char *message, size_t message_len,
const char *file, size_t file_len, int line) {
char message_copy[64] = {0};
char file_copy[64] = {0};
if (message != NULL) {
if (!probe_read_access(message, message_len)) {
goto access_violation;
}
message_len = MIN(message_len, sizeof(message_copy) - 1);
message = strncpy(message_copy, message, message_len);
} else {
message_len = 0;
}
if (file != NULL) {
if (!probe_read_access(file, file_len)) {
goto access_violation;
}
file_len = MIN(file_len, sizeof(file_copy) - 1);
file = strncpy(file_copy, file, file_len);
} else {
file_len = 0;
}
systask_t *task = systask_active();
systask_exit_fatal(task, message, message_len, file, file_len, line);
return;
access_violation:
apptask_access_violation();
}
// ---------------------------------------------------------------------
void reboot_and_upgrade__verified(const uint8_t hash[32]) {
if (!probe_read_access(hash, 32)) {
goto access_violation;
}
reboot_and_upgrade(hash);
access_violation:
apptask_access_violation();
}
// ---------------------------------------------------------------------
#ifdef XFRAMEBUFFER
bool display_get_frame_buffer__verified(display_fb_info_t *fb) {
if (!probe_write_access(fb, sizeof(*fb))) {
goto access_violation;
}
display_fb_info_t fb_copy = {0};
bool result = display_get_frame_buffer(&fb_copy);
*fb = fb_copy;
return result;
access_violation:
apptask_access_violation();
return false;
}
#endif // XFRAMEBUFFER
void display_fill__verified(const gfx_bitblt_t *bb) {
if (!probe_read_access(bb, sizeof(*bb))) {
goto access_violation;
}
gfx_bitblt_t bb_copy = *bb;
display_fill(&bb_copy);
return;
access_violation:
apptask_access_violation();
}
void display_copy_rgb565__verified(const gfx_bitblt_t *bb) {
if (!probe_read_access(bb, sizeof(*bb))) {
goto access_violation;
}
gfx_bitblt_t bb_copy = *bb;
uint8_t *src_ptr = (uint8_t *)bb_copy.src_row;
size_t src_len = bb_copy.src_stride * bb_copy.height;
if (!probe_read_access(src_ptr, src_len)) {
goto access_violation;
}
display_copy_rgb565(&bb_copy);
return;
access_violation:
apptask_access_violation();
}
// ---------------------------------------------------------------------
int usb_hid_read__verified(uint8_t iface_num, uint8_t *buf, uint32_t len) {
if (!probe_write_access(buf, len)) {
goto access_violation;
}
return usb_hid_read(iface_num, buf, len);
access_violation:
apptask_access_violation();
return 0;
}
int usb_hid_write__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len) {
if (!probe_read_access(buf, len)) {
goto access_violation;
}
return usb_hid_write(iface_num, buf, len);
access_violation:
apptask_access_violation();
return 0;
}
int usb_hid_read_blocking__verified(uint8_t iface_num, uint8_t *buf,
uint32_t len, int timeout) {
if (!probe_write_access(buf, len)) {
goto access_violation;
}
return usb_hid_read_blocking(iface_num, buf, len, timeout);
access_violation:
apptask_access_violation();
return 0;
}
int usb_hid_write_blocking__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len, int timeout) {
if (!probe_read_access(buf, len)) {
goto access_violation;
}
return usb_hid_write_blocking(iface_num, buf, len, timeout);
access_violation:
apptask_access_violation();
return 0;
}
// ---------------------------------------------------------------------
int usb_vcp_read__verified(uint8_t iface_num, uint8_t *buf, uint32_t len) {
if (!probe_write_access(buf, len)) {
goto access_violation;
}
return usb_vcp_read(iface_num, buf, len);
access_violation:
apptask_access_violation();
return 0;
}
int usb_vcp_write__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len) {
if (!probe_read_access(buf, len)) {
goto access_violation;
}
return usb_vcp_write(iface_num, buf, len);
access_violation:
apptask_access_violation();
return 0;
}
int usb_vcp_read_blocking__verified(uint8_t iface_num, uint8_t *buf,
uint32_t len, int timeout) {
if (!probe_write_access(buf, len)) {
goto access_violation;
}
return usb_vcp_read_blocking(iface_num, buf, len, timeout);
access_violation:
apptask_access_violation();
return 0;
}
int usb_vcp_write_blocking__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len, int timeout) {
if (!probe_read_access(buf, len)) {
goto access_violation;
}
return usb_vcp_write_blocking(iface_num, buf, len, timeout);
access_violation:
apptask_access_violation();
return 0;
}
// ---------------------------------------------------------------------
int usb_webusb_read__verified(uint8_t iface_num, uint8_t *buf, uint32_t len) {
if (!probe_write_access(buf, len)) {
goto access_violation;
}
return usb_webusb_read(iface_num, buf, len);
access_violation:
apptask_access_violation();
return 0;
}
int usb_webusb_write__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len) {
if (!probe_read_access(buf, len)) {
goto access_violation;
}
return usb_webusb_write(iface_num, buf, len);
access_violation:
apptask_access_violation();
return 0;
}
int usb_webusb_read_blocking__verified(uint8_t iface_num, uint8_t *buf,
uint32_t len, int timeout) {
if (!probe_write_access(buf, len)) {
goto access_violation;
}
return usb_webusb_read_blocking(iface_num, buf, len, timeout);
access_violation:
apptask_access_violation();
return 0;
}
int usb_webusb_write_blocking__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len, int timeout) {
if (!probe_read_access(buf, len)) {
goto access_violation;
}
return usb_webusb_write_blocking(iface_num, buf, len, timeout);
access_violation:
apptask_access_violation();
return 0;
}
// ---------------------------------------------------------------------
secbool __wur sdcard_read_blocks__verified(uint32_t *dest, uint32_t block_num,
uint32_t num_blocks) {
if (num_blocks >= (UINT32_MAX / SDCARD_BLOCK_SIZE)) {
goto access_violation;
}
if (!probe_write_access(dest, num_blocks * SDCARD_BLOCK_SIZE)) {
goto access_violation;
}
return sdcard_read_blocks(dest, block_num, num_blocks);
access_violation:
apptask_access_violation();
return secfalse;
}
secbool __wur sdcard_write_blocks__verified(const uint32_t *src,
uint32_t block_num,
uint32_t num_blocks) {
if (num_blocks >= (UINT32_MAX / SDCARD_BLOCK_SIZE)) {
goto access_violation;
}
if (!probe_read_access(src, num_blocks * SDCARD_BLOCK_SIZE)) {
goto access_violation;
}
return sdcard_write_blocks(src, block_num, num_blocks);
access_violation:
apptask_access_violation();
return secfalse;
}
// ---------------------------------------------------------------------
bool __wur optiga_cert_size__verified(uint8_t index, size_t *cert_size) {
if (!probe_write_access(cert_size, sizeof(*cert_size))) {
goto access_violation;
}
return optiga_cert_size(index, cert_size);
access_violation:
apptask_access_violation();
return false;
}
bool __wur optiga_read_cert__verified(uint8_t index, uint8_t *cert,
size_t max_cert_size, size_t *cert_size) {
if (!probe_write_access(cert, max_cert_size)) {
goto access_violation;
}
if (!probe_write_access(cert_size, sizeof(*cert_size))) {
goto access_violation;
}
return optiga_read_cert(index, cert, max_cert_size, cert_size);
access_violation:
apptask_access_violation();
return false;
}
bool __wur optiga_read_sec__verified(uint8_t *sec) {
if (!probe_write_access(sec, sizeof(*sec))) {
goto access_violation;
}
return optiga_read_sec(sec);
access_violation:
apptask_access_violation();
return false;
}
bool __wur optiga_random_buffer__verified(uint8_t *dest, size_t size) {
if (!probe_write_access(dest, size)) {
goto access_violation;
}
return optiga_random_buffer(dest, size);
access_violation:
apptask_access_violation();
return false;
}
// ---------------------------------------------------------------------
void storage_init__verified(PIN_UI_WAIT_CALLBACK callback, const uint8_t *salt,
const uint16_t salt_len) {
if (!probe_read_access(salt, salt_len)) {
goto access_violation;
}
storage_init(callback, salt, salt_len);
return;
access_violation:
apptask_access_violation();
}
secbool storage_unlock__verified(const uint8_t *pin, size_t pin_len,
const uint8_t *ext_salt) {
if (!probe_read_access(pin, pin_len)) {
goto access_violation;
}
if (!probe_read_access(ext_salt, EXTERNAL_SALT_SIZE)) {
goto access_violation;
}
return storage_unlock(pin, pin_len, ext_salt);
access_violation:
apptask_access_violation();
return secfalse;
}
secbool storage_change_pin__verified(const uint8_t *oldpin, size_t oldpin_len,
const uint8_t *newpin, size_t newpin_len,
const uint8_t *old_ext_salt,
const uint8_t *new_ext_salt) {
if (!probe_read_access(oldpin, oldpin_len)) {
goto access_violation;
}
if (!probe_read_access(newpin, newpin_len)) {
goto access_violation;
}
if (!probe_read_access(old_ext_salt, EXTERNAL_SALT_SIZE)) {
goto access_violation;
}
if (!probe_read_access(new_ext_salt, EXTERNAL_SALT_SIZE)) {
goto access_violation;
}
return storage_change_pin(oldpin, oldpin_len, newpin, newpin_len,
old_ext_salt, new_ext_salt);
access_violation:
apptask_access_violation();
return secfalse;
}
void storage_ensure_not_wipe_code__verified(const uint8_t *pin,
size_t pin_len) {
if (!probe_read_access(pin, pin_len)) {
goto access_violation;
}
storage_ensure_not_wipe_code(pin, pin_len);
return;
access_violation:
apptask_access_violation();
}
secbool storage_change_wipe_code__verified(const uint8_t *pin, size_t pin_len,
const uint8_t *ext_salt,
const uint8_t *wipe_code,
size_t wipe_code_len) {
if (!probe_read_access(pin, pin_len)) {
goto access_violation;
}
if (!probe_read_access(ext_salt, EXTERNAL_SALT_SIZE)) {
goto access_violation;
}
if (!probe_read_access(wipe_code, wipe_code_len)) {
goto access_violation;
}
return storage_change_wipe_code(pin, pin_len, ext_salt, wipe_code,
wipe_code_len);
access_violation:
apptask_access_violation();
return secfalse;
}
secbool storage_get__verified(const uint16_t key, void *val,
const uint16_t max_len, uint16_t *len) {
if (!probe_write_access(val, max_len)) {
goto access_violation;
}
if (!probe_write_access(len, sizeof(*len))) {
goto access_violation;
}
return storage_get(key, val, max_len, len);
access_violation:
apptask_access_violation();
return secfalse;
}
secbool storage_set__verified(const uint16_t key, const void *val,
const uint16_t len) {
if (!probe_read_access(val, len)) {
goto access_violation;
}
return storage_set(key, val, len);
access_violation:
apptask_access_violation();
return secfalse;
}
secbool storage_next_counter__verified(const uint16_t key, uint32_t *count) {
if (!probe_write_access(count, sizeof(*count))) {
goto access_violation;
}
return storage_next_counter(key, count);
access_violation:
apptask_access_violation();
return secfalse;
}
// ---------------------------------------------------------------------
bool translations_write__verified(const uint8_t *data, uint32_t offset,
uint32_t len) {
if (!probe_read_access(data, len)) {
goto access_violation;
}
return translations_write(data, offset, len);
access_violation:
apptask_access_violation();
return false;
}
const uint8_t *translations_read__verified(uint32_t *len, uint32_t offset) {
if (!probe_write_access(len, sizeof(*len))) {
goto access_violation;
}
return translations_read(len, offset);
access_violation:
apptask_access_violation();
return NULL;
}
// ---------------------------------------------------------------------
void entropy_get__verified(uint8_t *buf) {
if (!probe_write_access(buf, HW_ENTROPY_LEN)) {
goto access_violation;
}
entropy_get(buf);
return;
access_violation:
apptask_access_violation();
}
// ---------------------------------------------------------------------
secbool firmware_calc_hash__verified(const uint8_t *challenge,
size_t challenge_len, uint8_t *hash,
size_t hash_len,
firmware_hash_callback_t callback,
void *callback_context) {
if (!probe_read_access(challenge, challenge_len)) {
goto access_violation;
}
if (!probe_write_access(hash, hash_len)) {
goto access_violation;
}
return firmware_calc_hash(challenge, challenge_len, hash, hash_len, callback,
callback_context);
access_violation:
apptask_access_violation();
return secfalse;
}
secbool firmware_get_vendor__verified(char *buff, size_t buff_size) {
if (!probe_write_access(buff, buff_size)) {
goto access_violation;
}
return firmware_get_vendor(buff, buff_size);
access_violation:
apptask_access_violation();
return secfalse;
}
#endif // SYSCALL_DISPATCH

169
core/embed/trezorhal/stm32f4/syscall_verifiers.h Normal file
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@ -0,0 +1,169 @@
/*
* This file is part of the Trezor project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TREZORHAL_SYSCALL_VERIFIERS_H
#define TREZORHAL_SYSCALL_VERIFIERS_H
#ifdef SYSCALL_DISPATCH
// ---------------------------------------------------------------------
#include "systask.h"
void system_exit__verified(int exit_code);
void system_exit_error__verified(const char *title, size_t title_len,
const char *message, size_t message_len,
const char *footer, size_t footer_len);
void system_exit_fatal__verified(const char *message, size_t message_len,
const char *file, size_t file_len, int line);
// ---------------------------------------------------------------------
#include "bootutils.h"
void reboot_and_upgrade__verified(const uint8_t hash[32]);
// ---------------------------------------------------------------------
#include "display.h"
#ifdef XFRAMEBUFFER
bool display_get_frame_buffer__verified(display_fb_info_t *fb);
#endif
void display_fill__verified(const gfx_bitblt_t *bb);
void display_copy_rgb565__verified(const gfx_bitblt_t *bb);
// ---------------------------------------------------------------------
#include "usb_hid.h"
int usb_hid_read__verified(uint8_t iface_num, uint8_t *buf, uint32_t len);
int usb_hid_write__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len);
int usb_hid_read_blocking__verified(uint8_t iface_num, uint8_t *buf,
uint32_t len, int timeout);
int usb_hid_write_blocking__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len, int timeout);
// ---------------------------------------------------------------------
#include "usb_vcp.h"
int usb_vcp_read__verified(uint8_t iface_num, uint8_t *buf, uint32_t len);
int usb_vcp_write__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len);
int usb_vcp_read_blocking__verified(uint8_t iface_num, uint8_t *buf,
uint32_t len, int timeout);
int usb_vcp_write_blocking__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len, int timeout);
// ---------------------------------------------------------------------
#include "usb_webusb.h"
int usb_webusb_read__verified(uint8_t iface_num, uint8_t *buf, uint32_t len);
int usb_webusb_write__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len);
int usb_webusb_read_blocking__verified(uint8_t iface_num, uint8_t *buf,
uint32_t len, int timeout);
int usb_webusb_write_blocking__verified(uint8_t iface_num, const uint8_t *buf,
uint32_t len, int timeout);
// ---------------------------------------------------------------------
#include "sdcard.h"
secbool __wur sdcard_read_blocks__verified(uint32_t *dest, uint32_t block_num,
uint32_t num_blocks);
secbool __wur sdcard_write_blocks__verified(const uint32_t *src,
uint32_t block_num,
uint32_t num_blocks);
// ---------------------------------------------------------------------
#include "optiga.h"
bool __wur optiga_cert_size__verified(uint8_t index, size_t *cert_size);
bool __wur optiga_read_cert__verified(uint8_t index, uint8_t *cert,
size_t max_cert_size, size_t *cert_size);
bool __wur optiga_read_sec__verified(uint8_t *sec);
bool __wur optiga_random_buffer__verified(uint8_t *dest, size_t size);
// ---------------------------------------------------------------------
#include "storage.h"
void storage_init__verified(PIN_UI_WAIT_CALLBACK callback, const uint8_t *salt,
const uint16_t salt_len);
secbool storage_unlock__verified(const uint8_t *pin, size_t pin_len,
const uint8_t *ext_salt);
secbool storage_change_pin__verified(const uint8_t *oldpin, size_t oldpin_len,
const uint8_t *newpin, size_t newpin_len,
const uint8_t *old_ext_salt,
const uint8_t *new_ext_salt);
void storage_ensure_not_wipe_code__verified(const uint8_t *pin, size_t pin_len);
secbool storage_change_wipe_code__verified(const uint8_t *pin, size_t pin_len,
const uint8_t *ext_salt,
const uint8_t *wipe_code,
size_t wipe_code_len);
secbool storage_get__verified(const uint16_t key, void *val,
const uint16_t max_len, uint16_t *len);
secbool storage_set__verified(const uint16_t key, const void *val,
const uint16_t len);
secbool storage_next_counter__verified(const uint16_t key, uint32_t *count);
// ---------------------------------------------------------------------
#include "translations.h"
bool translations_write__verified(const uint8_t *data, uint32_t offset,
uint32_t len);
const uint8_t *translations_read__verified(uint32_t *len, uint32_t offset);
// ---------------------------------------------------------------------
#include "entropy.h"
void entropy_get__verified(uint8_t *buf);
// ---------------------------------------------------------------------
#include "fwutils.h"
secbool firmware_calc_hash__verified(const uint8_t *challenge,
size_t challenge_len, uint8_t *hash,
size_t hash_len,
firmware_hash_callback_t callback,
void *callback_context);
secbool firmware_get_vendor__verified(char *buff, size_t buff_size);
#endif // SYSCALL_DISPATCH
#endif // TREZORHAL_SYSCALL_VERIFIERS_H

4
core/embed/trezorhal/stm32f4/systask.c
View File

@ -123,12 +123,14 @@ void systask_yield_to(systask_t* task) {
systask_yield();
}
void systask_init(systask_t* task, uint32_t stack_ptr, uint32_t stack_size) {
void systask_init(systask_t* task, uint32_t stack_ptr, uint32_t stack_size,
void* applet) {
memset(task, 0, sizeof(systask_t));
task->sp = stack_ptr + stack_size;
task->sp_lim = stack_ptr + 256;
task->exc_return = 0xFFFFFFED; // Thread mode, use PSP, pop FP context
task->mpu_mode = MPU_MODE_APP;
task->applet = applet;
}
uint32_t* systask_push_data(systask_t* task, const void* data, size_t size) {

1
core/embed/trezorhal/stm32u5/syscall_probe.c Symbolic link
View File

@ -0,0 +1 @@
../stm32f4/syscall_probe.c

1
core/embed/trezorhal/stm32u5/syscall_probe.h Symbolic link
View File

@ -0,0 +1 @@
../stm32f4/syscall_probe.h

1
core/embed/trezorhal/stm32u5/syscall_verifiers.c Symbolic link
View File

@ -0,0 +1 @@
../stm32f4/syscall_verifiers.c

1
core/embed/trezorhal/stm32u5/syscall_verifiers.h Symbolic link
View File

@ -0,0 +1 @@
../stm32f4/syscall_verifiers.h

5
core/embed/trezorhal/systask.h
View File

@ -117,6 +117,8 @@ typedef struct {
mpu_mode_t mpu_mode;
// Task post-mortem information
systask_postmortem_t pminfo;
// Applet bound to the task
void* applet;
} systask_t;
@ -134,7 +136,8 @@ void systask_yield_to(systask_t* task);
// Initializes a task with the given stack pointer, stack size
//
// The task must be not be running when the function is called
void systask_init(systask_t* task, uint32_t stack_ptr, uint32_t stack_size);
void systask_init(systask_t* task, uint32_t stack_ptr, uint32_t stack_size,
void* context);
// Pushes data onto the stack of the task
//

2
core/site_scons/models/stm32f4_common.py
View File

@ -56,7 +56,9 @@ def stm32f4_common_files(env, defines, sources, paths):
"embed/trezorhal/stm32f4/secret.c",
"embed/trezorhal/stm32f4/syscall.c",
"embed/trezorhal/stm32f4/syscall_dispatch.c",
"embed/trezorhal/stm32f4/syscall_probe.c",
"embed/trezorhal/stm32f4/syscall_stubs.c",
"embed/trezorhal/stm32f4/syscall_verifiers.c",
"embed/trezorhal/stm32f4/system.c",
"embed/trezorhal/stm32f4/systask.c",
"embed/trezorhal/stm32f4/systick.c",

2
core/site_scons/models/stm32u5_common.py
View File

@ -67,7 +67,9 @@ def stm32u5_common_files(env, defines, sources, paths):
"embed/trezorhal/stm32u5/secure_aes.c",
"embed/trezorhal/stm32u5/syscall.c",
"embed/trezorhal/stm32u5/syscall_dispatch.c",
"embed/trezorhal/stm32u5/syscall_probe.c",
"embed/trezorhal/stm32u5/syscall_stubs.c",
"embed/trezorhal/stm32u5/syscall_verifiers.c",
"embed/trezorhal/stm32u5/system.c",
"embed/trezorhal/stm32u5/systask.c",
"embed/trezorhal/stm32u5/systick.c",