[ESP32] Flash Encryption 手動加密檔案失敗

[ken_cheng]

您好, 我在ESP32S3上使用Flash Encryption成功，但是在ESP32上使用不成功，問題如下，謝謝
Ken.

使用流程：
1. 產生固定的key.bin檔案
2. 將key.bin寫進裝置
espefuse.py -p com20 burn_key BLOCK1 esp32_key1.bin --no-protect-key
3. 燒錄Efuse，burn_efuse FLASH_CRYPT_CNT 1、FLASH_CRYPT_CONFIG 0xF
4. 使用以下指令加密檔案
espsecure.py encrypt_flash_data --flash_crypt_conf 0xf --keyfile esp32_key1.bin --address 0x10000 --output app2.ebin GetChipID.ino.bin
5. 燒錄加密的檔案

問題如下：
1. 我使用 --no-protect-key 寫入 key.bin檔案，發現讀回的 key 值，不同於技術文件中，數值的順序相反，我有2台ESP32，使用相同的key.bin 但讀回的 key值皆不同，如附件

2. 要如何加密檔案，使其能夠與--encrypt加密的檔案相同呢？除了使用相同的key.bin、--flash_crypt_conf 0xf，加上 --aes_xts 也是不同，是否還有其他需要注意的地方？

驗證方式
使用 --encrypt 寫入各檔案，再使用 esptool.py read_flash 讀回檔案，發現與自行加密的檔案不同

目前的 Efuse summary

espefuse.py v3.3.2
Connecting...
Failed to get PID of a device on com20, using standard reset sequence.
..
Detecting chip type... Unsupported detection protocol, switching and trying again...
Connecting...
Failed to get PID of a device on com20, using standard reset sequence.
....
Detecting chip type... ESP32

=== Run "summary" command ===
EFUSE_NAME (Block) Description = [Meaningful Value] [Readable/Writeable] (Hex Value)
----------------------------------------------------------------------------------------
Calibration fuses:
BLK3_PART_RESERVE (BLOCK0): BLOCK3 partially served for ADC calibration data = False R/W (0b0)
ADC_VREF (BLOCK0): Voltage reference calibration = 1100 R/W (0b10000)

Config fuses:
XPD_SDIO_FORCE (BLOCK0): Ignore MTDI pin (GPIO12) for VDD_SDIO on reset = False R/W (0b0)
XPD_SDIO_REG (BLOCK0): If XPD_SDIO_FORCE, enable VDD_SDIO reg on reset = False R/W (0b0)
XPD_SDIO_TIEH (BLOCK0): If XPD_SDIO_FORCE & XPD_SDIO_REG = 1.8V R/W (0b0)
CLK8M_FREQ (BLOCK0): 8MHz clock freq override = 51 R/W (0x33)
SPI_PAD_CONFIG_CLK (BLOCK0): Override SD_CLK pad (GPIO6/SPICLK) = 0 R/W (0b00000)
SPI_PAD_CONFIG_Q (BLOCK0): Override SD_DATA_0 pad (GPIO7/SPIQ) = 0 R/W (0b00000)
SPI_PAD_CONFIG_D (BLOCK0): Override SD_DATA_1 pad (GPIO8/SPID) = 0 R/W (0b00000)
SPI_PAD_CONFIG_HD (BLOCK0): Override SD_DATA_2 pad (GPIO9/SPIHD) = 0 R/W (0b00000)
SPI_PAD_CONFIG_CS0 (BLOCK0): Override SD_CMD pad (GPIO11/SPICS0) = 0 R/W (0b00000)
DISABLE_SDIO_HOST (BLOCK0): Disable SDIO host = False R/W (0b0)

Efuse fuses:
WR_DIS (BLOCK0): Efuse write disable mask = 0 R/W (0x0000)
RD_DIS (BLOCK0): Efuse read disable mask = 0 R/W (0x0)
CODING_SCHEME (BLOCK0): Efuse variable block length scheme
= NONE (BLK1-3 len=256 bits) R/W (0b00)
KEY_STATUS (BLOCK0): Usage of efuse block 3 (reserved) = False R/W (0b0)

Identity fuses:
MAC (BLOCK0): Factory MAC Address
= c8:f0:9e:0a:03:a8 (CRC 0x3e OK) R/W
MAC_CRC (BLOCK0): CRC8 for factory MAC address = 62 R/W (0x3e)
CHIP_VER_REV1 (BLOCK0): Silicon Revision 1 = True R/W (0b1)
CHIP_VER_REV2 (BLOCK0): Silicon Revision 2 = True R/W (0b1)
CHIP_VERSION (BLOCK0): Reserved for future chip versions = 2 R/W (0b10)
CHIP_PACKAGE (BLOCK0): Chip package identifier = 1 R/W (0b001)
CHIP_PACKAGE_4BIT (BLOCK0): Chip package identifier #4bit = False R/W (0b0)
MAC_VERSION (BLOCK3): Version of the MAC field = 0 R/W (0x00)

Security fuses:
FLASH_CRYPT_CNT (BLOCK0): Flash encryption mode counter = 1 R/W (0b0000001)
UART_DOWNLOAD_DIS (BLOCK0): Disable UART download mode (ESP32 rev3 only) = False R/W (0b0)
FLASH_CRYPT_CONFIG (BLOCK0): Flash encryption config (key tweak bits) = 15 R/W (0xf)
CONSOLE_DEBUG_DISABLE (BLOCK0): Disable ROM BASIC interpreter fallback = True R/W (0b1)
ABS_DONE_0 (BLOCK0): Secure boot V1 is enabled for bootloader image = False R/W (0b0)
ABS_DONE_1 (BLOCK0): Secure boot V2 is enabled for bootloader image = False R/W (0b0)
JTAG_DISABLE (BLOCK0): Disable JTAG = False R/W (0b0)
DISABLE_DL_ENCRYPT (BLOCK0): Disable flash encryption in UART bootloader = False R/W (0b0)
DISABLE_DL_DECRYPT (BLOCK0): Disable flash decryption in UART bootloader = False R/W (0b0)
DISABLE_DL_CACHE (BLOCK0): Disable flash cache in UART bootloader = False R/W (0b0)
BLOCK1 (BLOCK1): Flash encryption key
= 35 44 30 31 35 41 30 30 35 42 30 33 35 38 30 34 35 46 30 31 35 42 37 37 32 43 37 34 32 46 37 37 R/W
BLOCK2 (BLOCK2): Secure boot key
= 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W
BLOCK3 (BLOCK3): Variable Block 3
= 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 R/W

Flash voltage (VDD_SDIO) determined by GPIO12 on reset (High for 1.8V, Low/NC for 3.3V).