commit 84da51b646ed4ca13729ac79edc27fe8e0f973bd
author Almir Okato <almir.okato@espressif.com> Fri Nov 25 01:25:41 2022 -0300
committer Gustavo Henrique Nihei <38959758+gustavonihei@users.noreply.github.com> Mon Dec 19 11:02:55 2022 -0300
tree 346846f1bbf74cd235cbe96e2691aeb44b072e99
parent 421730e846259afcb54fcca3f8f6fcf8eb26c3be

espressif: add downgrade prevention feature

Signed-off-by: Almir Okato <almir.okato@espressif.com>

boot/espressif/port/esp32/bootloader.conf

diff --git a/boot/espressif/port/esp32/bootloader.conf b/boot/espressif/port/esp32/bootloader.conf
index 67a4d14..8f555ec 100644
--- a/boot/espressif/port/esp32/bootloader.conf
+++ b/boot/espressif/port/esp32/bootloader.conf
@@ -12,6 +12,12 @@
 CONFIG_ESP_SCRATCH_OFFSET=0x210000
 CONFIG_ESP_SCRATCH_SIZE=0x40000
 
+# When enabled, prevents updating image to an older version
+# CONFIG_ESP_DOWNGRADE_PREVENTION=y
+# This option makes downgrade prevention rely also on security
+# counter (defined using imgtool) instead of only image version
+# CONFIG_ESP_DOWNGRADE_PREVENTION_SECURITY_COUNTER=y
+
 # Enables the MCUboot Serial Recovery, that allows the use of
 # MCUMGR to upload a firmware through the serial port
 # CONFIG_ESP_MCUBOOT_SERIAL=y