Sig block 0 signed with untrusted key on ESP32

[Eric Hsieh]

Hi All,

My device is ESP32-WROVER-E with branch release/v5.1 from GitHub.
I try to enable sign and encrypt like this.

Screenshot 2023-11-20 at 10.45.03.png (91.71 KiB) Viewed 2583 times

Screenshot 2023-11-20 at 10.46.44.png (32.13 KiB) Viewed 2583 times

I already enable ABS_DONE_1 and write Security boot key, please check attachment.

Screenshot 2023-11-20 at 10.48.29.png (354.09 KiB) Viewed 2583 times

This is my partition table.

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Partition table binary generated. Contents:
*******************************************************************************
# ESP-IDF Partition Table
# Name, Type, SubType, Offset, Size, Flags
nvs,data,nvs,0x10000,24K,
phy_init,data,phy,0x16000,4K,
factory,app,factory,0x20000,1M,

I try to use following commands to flash my device.

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# write encrypt bootloader
# esptool.py --chip esp32 --port=/dev/tty.usbserial-141430 --baud=115200 --before=default_reset --after=no_reset write_flash --encrypt --flash_mode dio --flash_freq 40m --flash_size keep 0x1000 build/bootloader/bootloader.bin

# write encrypt partition table
# esptool.py -p /dev/tty.usbserial-141430 -b 460800 --before default_reset --after no_reset --chip esp32 write_flash --encrypt 0xf000 build/partition_table/partition-table.bin

# write encrypt app
# esptool.py -p /dev/tty.usbserial-141430 -b 460800 --before default_reset --after no_reset --chip esp32 write_flash --encrypt --flash_mode dio --flash_size keep --flash_freq 40m 0x20000 build/app-template.bin

When I try to run "hello world" example code, I will have following output.

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rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:2, clock div:2
secure boot v2 enabled
Sig block 0 signed with untrusted key
secure boot verification failed

Anyone can help or teach which part is wrong? I would like to try sign and encrypt at ESP32 to see my understanding for whole secure boot. Thanks.

[Eric Hsieh]

Anyone can help? Thanks.