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enable stack protector

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This commit is contained in:
Pavol Rusnak 2014-07-30 20:34:28 +02:00
parent a2eb43b057
commit 524f2a957a
10 changed files with 27 additions and 94 deletions
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9
Dockerfile
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@ -6,14 +6,9 @@ FROM ubuntu:14.04
RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys FE324A81C208C89497EFC6246D1D8367A3421AFB && echo "deb http://ppa.launchpad.net/terry.guo/gcc-arm-embedded/ubuntu trusty main" >> /etc/apt/sources.list && apt-get update
# define used versions for pinning
ENV GCC_ARM_VERSION 4-8-2014q2-0trusty10
ENV LIBOPENCM3_GITREV f6b6d62ec5628ebb0602c466ee9fd7a6070ef1f0
ENV TREZOR_MCU_GITREV v1.2.0
# install build tools and dependencies
ENV GCC_ARM_VERSION 4-8-2014q2-0trusty10
RUN apt-get install -y build-essential git gcc-arm-none-eabi=$GCC_ARM_VERSION python
# clone the source code
@ -22,8 +17,10 @@ RUN git clone https://github.com/libopencm3/libopencm3 && git clone https://gith
# build libopencm3
ENV LIBOPENCM3_GITREV f6b6d62ec5628ebb0602c466ee9fd7a6070ef1f0
RUN cd libopencm3 && git checkout $LIBOPENCM3_GITREV && make
# build the firmware
ENV TREZOR_MCU_GITREV v1.2.1
RUN cd trezor-mcu && git checkout $TREZOR_MCU_GITREV && git submodule update --init && make && cd firmware && make

1
Makefile.include
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@ -35,6 +35,7 @@ CFLAGS += $(OPTFLAGS) \
-fvisibility=internal \
-ffunction-sections \
-fdata-sections \
-fstack-protector-all \
-mcpu=cortex-m3 \
-mthumb \
-msoft-float \

1
firmware/Makefile
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@ -2,7 +2,6 @@ APPVER = 1.0.0
NAME = trezor
OBJS += ssp.o
OBJS += usb.o
OBJS += messages.o
OBJS += storage.o

40
firmware/ssp.c
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@ -1,40 +0,0 @@
/*
* This file is part of the TREZOR project.
*
* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ssp.h"
#include "rng.h"
#include "layout.h"
void *__stack_chk_guard = 0;
void __stack_chk_guard_setup(void)
{
unsigned char * p;
p = (unsigned char *) &__stack_chk_guard;
p[0] = 0;
p[1] = 0;
p[2] = '\n';
p[3] = 0xFF; // random32() & 0xFF;
}
void __attribute__((noreturn)) __stack_chk_fail(void)
{
layoutDialog(DIALOG_ICON_ERROR, NULL, NULL, NULL, "Stack smashing", "detected.", NULL, "Please unplug", "the device.", NULL);
for (;;) {} // loop forever
}

26
firmware/ssp.h
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@ -1,26 +0,0 @@
/*
* This file is part of the TREZOR project.
*
* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __SSP_H_
#define __SSP_H_
void __stack_chk_guard_setup(void);
void __attribute__((noreturn)) __stack_chk_fail(void);
#endif

7
firmware/storage.c
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@ -63,12 +63,15 @@ static char sessionPassphrase[51];
0x0010 | ? | Storage structure
*/
#define STORAGE_VERSION 1
#define STORAGE_VERSION 2
void storage_from_flash(uint32_t version)
{
switch (version) {
case 1:
case 1: // copy
memcpy(&storage, (void *)(FLASH_STORAGE_START + 4 + sizeof(storage_uuid)), sizeof(Storage));
break;
case 2: // copy
memcpy(&storage, (void *)(FLASH_STORAGE_START + 4 + sizeof(storage_uuid)), sizeof(Storage));
break;
}

4
firmware/transaction.c
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@ -246,7 +246,7 @@ void tx_init(TxStruct *tx, uint32_t inputs_len, uint32_t outputs_len, uint32_t v
bool tx_hash_input(TxStruct *t, TxInputType *input)
{
uint8_t buf[512];
uint8_t buf[1024];
uint32_t r = tx_serialize_input(t, input->prev_hash.bytes, input->prev_index, input->script_sig.bytes, input->script_sig.size, input->sequence, buf);
if (!r) return false;
sha256_Update(&(t->ctx), buf, r);
@ -255,7 +255,7 @@ bool tx_hash_input(TxStruct *t, TxInputType *input)
bool tx_hash_output(TxStruct *t, TxOutputBinType *output)
{
uint8_t buf[512];
uint8_t buf[1024];
uint32_t r = tx_serialize_output(t, output->amount, output->script_pubkey.bytes, output->script_pubkey.size, buf);
if (!r) return false;
sha256_Update(&(t->ctx), buf, r);

13
firmware/trezor.c
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@ -24,18 +24,27 @@
#include "usb.h"
#include "setup.h"
#include "storage.h"
#include "layout.h"
#include "layout2.h"
#include "ssp.h"
#include "rng.h"
uint32_t __stack_chk_guard;
void __attribute__((noreturn)) __stack_chk_fail(void)
{
layoutDialog(DIALOG_ICON_ERROR, NULL, NULL, NULL, "Stack smashing", "detected.", NULL, "Please unplug", "the device.", NULL);
for (;;) {} // loop forever
}
int main(void)
{
__stack_chk_guard = random32();
#ifndef APPVER
setup();
oledInit();
#else
setupApp();
#endif
// __stack_chk_guard_setup();
#if DEBUG_LINK
oledSetDebug(1);
storage_reset(); // wipe storage if debug link

2
firmware/trezor.h
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@ -22,7 +22,7 @@
#define VERSION_MAJOR 1
#define VERSION_MINOR 2
#define VERSION_PATCH 0
#define VERSION_PATCH 1
#define STR(X) #X
#define VERSTR(X) STR(X)

18
serialno.c
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@ -20,27 +20,17 @@
#include <stdint.h>
#include <string.h>
#include <libopencm3/stm32/desig.h>
#include "serialno.h"
#include "util.h"
#include "sha2.h"
#if defined(STM32F4) || defined(STM32F2)
#define UNIQUE_SERIAL_ADDR 0x1FFF7A10
#elif defined(STM32F3)
#define UNIQUE_SERIAL_ADDR 0x1FFFF7AC
#elif defined(STM32L1)
#define UNIQUE_SERIAL_ADDR 0x1FF80050
#else // STM32F1
#define UNIQUE_SERIAL_ADDR 0x1FFFF7E8
#endif
void fill_serialno_fixed(char *s)
{
uint8_t uuid[32];
memcpy(uuid, (uint8_t *)UNIQUE_SERIAL_ADDR, 12);
memcpy(uuid + 12, (uint8_t *)UNIQUE_SERIAL_ADDR, 12);
memcpy(uuid + 24, (uint8_t *)UNIQUE_SERIAL_ADDR, 8);
sha256_Raw(uuid, 32, uuid);
desig_get_unique_id((uint32_t *)uuid);
sha256_Raw(uuid, 12, uuid);
sha256_Raw(uuid, 32, uuid);
data2hex(uuid, 12, s);
}