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fix(espefuse): Fix ECDSA_FORCE_USE_HARDWARE_K for ECDSA key (esp32h2)

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KonstantinKondrashov
2023-11-07 16:44:28 +08:00
committed by Radim Karniš
parent 1b350ce041
commit f607f19296
1 changed files with 9 additions and 0 deletions
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9
espefuse/efuse/esp32h2/operations.py
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@@ -323,6 +323,15 @@ def burn_key(esp, efuses, args, digest=None):
if efuses[block.key_purpose_name].is_writeable():
disable_wr_protect_key_purpose = True
if keypurpose == "ECDSA_KEY":
if efuses["ECDSA_FORCE_USE_HARDWARE_K"].get() == 0:
# For ECDSA key purpose block permanently enable
# the hardware TRNG supplied k mode (most secure mode)
print("\tECDSA_FORCE_USE_HARDWARE_K: 0 -> 1")
efuses["ECDSA_FORCE_USE_HARDWARE_K"].save(1)
else:
print("\tECDSA_FORCE_USE_HARDWARE_K is already '1'")
if disable_wr_protect_key_purpose:
print("\tDisabling write to '%s'." % block.key_purpose_name)
efuses[block.key_purpose_name].disable_write()