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esp-idf/components/esp_system
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Mahavir Jain d3b4acf7a0 fix(esp32h2): program use_hardware_k efuse bit for ECDSA key purpose 
In ESP32-H2, the ECDSA peripheral by default uses the TRNG (hardware)
generated k value but it can be overridden to software supplied k.
This can happen through by overriding the `ECDSA_SOFTWARE_SET_K` bit
in the configuration register. Even though the HAL API is not exposed
for this but still it could be achieved by direct register
programming. And for this scenario, if sufficiently random k is not
supplied by the software then it could posses a security risk.

In this change, we are unconditionally programming the efuse
`ESP_EFUSE_ECDSA_FORCE_USE_HARDWARE_K` bit during startup security
checks itself. Additionally, same is ensured in the `esp_efuse_write_key`
API as well. This always enforces the hardware k mode in the ECDSA
peripheral and ensures strongest possible security.
2023-11-17 07:13:53 +00:00
..
include feat(wdt): add multicore support for WDTs on RISCV 2023-10-23 18:26:08 +08:00
ld fix: Fix ESP32-P4 lp_reserved_seg origin 2023-10-25 08:09:33 +02:00
port fix(esp_system): increase esp32h2 slow clock calibration timeout watchdog threshold 2023-11-03 19:08:28 +08:00
task_wdt feat(wdt): add multicore support for WDTs on RISCV 2023-10-23 18:26:08 +08:00
test_apps feat(uart): spilt LP and HP uart set_baudrate function 2023-10-08 10:10:02 +08:00
test_eh_frame_parser System: implement libunwind library for RISC-V backtracing 2023-05-15 11:19:03 +08:00
app.lf feat(tcm): added tcm basic support on esp32p4 2023-07-25 05:59:10 +00:00
check_system_init_priorities.py esp_system: add a script to check the startup priorities 2022-07-12 16:58:14 +02:00
CMakeLists.txt feat(esp_system): implement hw stack guard for riscv chips 2023-07-01 16:27:40 +00:00
crosscore_int.c feat(wdt): add multicore support for WDTs on RISCV 2023-10-23 18:26:08 +08:00
debug_stubs.c esp_system: fix and reenable no-format warning 2023-03-28 13:42:44 +02:00
eh_frame_parser.c fix(esp_system): fix gcc 13.1.0 warnings 2023-10-09 12:13:02 +04:00
esp_err.c feature: add ram loadable app support 2023-02-01 17:57:22 +08:00
esp_ipc.c refactor(freertos): Refactor usage of portBASE_TYPE to BaseType_t 2023-07-31 17:10:34 +02:00
esp_system.c System: remove digital-system reset within OS restart when Memprot on 2023-06-26 20:22:59 +02:00
fpga_overrides.c feat(gptimer): use RCC atomic block to enable/reset peripheral 2023-08-22 17:05:35 +08:00
freertos_hooks.c hal: Deprecate interrupt_controller_hal.h, cpu_hal.h and cpu_ll.h interfaces 2022-07-22 00:06:06 +08:00
hw_stack_guard.c feat(esp_system): implement hw stack guard for riscv chips 2023-07-01 16:27:40 +00:00
int_wdt.c feat(gptimer): use RCC atomic block to enable/reset peripheral 2023-08-22 17:05:35 +08:00
Kconfig feat(esp_system): Support IPC_ISR for ESP32P4 2023-09-15 23:38:12 +08:00
linker.lf feat(uart): Add sdkconfig.ci.iram_safe test for UART driver 2023-08-30 11:30:03 +08:00
panic.c Merge branch 'check_debug_aware_config' into 'master' 2023-10-21 15:20:26 +08:00
README.md brownout: Disable the hardware BOD when BOD interrupt is enabled 2023-04-21 10:22:59 +08:00
sdkconfig.rename TWDT: Use the new TWDT Kconfig options in the examples and tests 2023-02-17 11:22:25 +08:00
sdkconfig.rename.esp32 kconfig: move remaining kconfig options out of target component 2022-05-23 17:57:45 +08:00
sdkconfig.rename.esp32c3 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
sdkconfig.rename.esp32s2 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
sdkconfig.rename.esp32s3 soc: moved kconfig options out of the target component. 2022-04-21 12:09:43 +08:00
stack_check.c esp_system: fix placement of __stack_chk_fail from flash to RAM 2022-12-07 08:49:12 +01:00
startup.c fix(esp32h2): program use_hardware_k efuse bit for ECDSA key purpose 2023-11-17 07:13:53 +00:00
system_init_fn.txt feat(esp_system): implement hw stack guard for riscv chips 2023-07-01 16:27:40 +00:00
system_time.c feat(esp_system): base support on p4 2023-07-25 05:59:10 +00:00
systick_etm.c systimer: assign counter and alarm in esp_hw_support 2023-01-10 17:05:49 +08:00
ubsan.c hal: Deprecate interrupt_controller_hal.h, cpu_hal.h and cpu_ll.h interfaces 2022-07-22 00:06:06 +08:00
xt_wdt.c esp_system: fix and reenable no-format warning 2023-03-28 13:42:44 +02:00

README.md

System Notes

Timekeeping

The following are the timekeeping mechanisms available and their differences:

  1. System time (esp_system_get_time)

Time with the origin at g_startup_time. The implementation is not handled by esp_system, but it does provide a default implementation using RTC timer. Currently, esp_timer provides system time, since the hardware timers are under the control of that component. However, no matter the underlying timer, the system time provider should maintain the definition of having the origin point at g_startup_time.

  1. esp_timer time (esp_timer_get_time)

This is the time read from an underlying hardware timer, controlled through config. Origin is at the point where the underlying timer starts counting.

  1. newlib time (gettimeofday)

Timekeeping function in standard library. Can be set (settimeofday) or moved forward/backward (adjtime); with the possibility of the changes being made persistent through config. Currently implemented in terms of system time, as the point of origin is fixed. If persistence is enabled, RTC time is also used in conjuction with system time.

  1. RTC time (esp_rtc_get_time_us)

Time read from RTC timer.

Brownout

on some boards, we name BOD1 as ana_bod, to unify the usage, using BOD1 in following passage.

BOD1 will be a little faster then BOD0, but BOD0 can be widely used(can reset rf, flash, or using interrupt, etc.) So, in IDF code, we use BOD1 in bootloader and BOD0 in the app.