Starting from the ESP32-S31, the ECDSA peripheral can use a private key
written into its key registers by software, in addition to the eFuse
and Key Manager key sources.
Report whether the SHA peripheral can run the SM3 mode. The LL function
sha_ll_is_sm3_supported() exists on every chip. ESP32-S31 reads the
DIS_SM_CRYPT eFuse, which disables SM2 and SM3 permanently. ESP32-C5 and
ESP32-H4 have SM3 but no such eFuse. All other chips have no SM3.
The Key Manager hardware peripheral in its current form needs further
design changes before it can be offered as a production feature.
Until a revised peripheral design is available, withdraw ESP-IDF
support for it on all Key Manager capable targets.
Laukik Hase
nilesh.kale
Ashish Sharma
harshal.patil
Chen Jichang
Aditya Patwardhan