Zephyr bus fault when using PSA crypto with CC310 and Openthread L2 layer

RE: Zephyr bus fault when using PSA crypto with CC310 and Openthread L2 layer

Utkarsh — Mon, 05 Aug 2024 12:22:04 GMT

Any update?

RE: Zephyr bus fault when using PSA crypto with CC310 and Openthread L2 layer

Priyanka — Fri, 14 Jul 2023 11:18:08 GMT

Hi Neal,

Amanda is on vacation and I have been assigned the case for the time being. I have asked internally for the updates and will get back to you once I hear from them. But this might take a while as we are currently short staffed due to the summer holidays here in Norway.

Thank you very much for your patience and understanding.

Regards,

Priyanka

RE: Zephyr bus fault when using PSA crypto with CC310 and Openthread L2 layer

nealjack — Thu, 06 Jul 2023 15:13:13 GMT

This issue is still present on 2.4.0. Does Nordic have any plans or ideas on how to resolve this? Our development is stalled as we require cryptographic operations in tandem with Openthread networking.

This problem can be replicated with the nrf/crypto/ecdsa sample with this configuration:

# The Zephyr CMSIS emulation assumes that ticks are ms, currently
CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000

CONFIG_MAIN_STACK_SIZE=8192
CONFIG_HEAP_MEM_POOL_SIZE=8192

# Enable logging
CONFIG_CONSOLE=y
CONFIG_LOG=y

# Enable nordic security backend and PSA APIs
CONFIG_NRF_SECURITY=y
CONFIG_MBEDTLS_PSA_CRYPTO_C=y

CONFIG_MBEDTLS_ENABLE_HEAP=y
CONFIG_MBEDTLS_HEAP_SIZE=8192

CONFIG_NETWORKING=y
CONFIG_NET_L2_OPENTHREAD=y

CONFIG_CC3XX_BACKEND=y
CONFIG_PSA_CRYPTO_DRIVER_CC3XX=y

RE: Zephyr bus fault when using PSA crypto with CC310 and Openthread L2 layer

Amanda Hsieh — Thu, 18 May 2023 15:17:43 GMT

Hi,

Sorry for the late reply.

Seems Openthread does not support PSA API and probably for this reason, it caused the issue with the configuration. Unfortunately, the team doesn't have a solution currently, but I suggest you try to check your application on the v2.4.0-rc1 tag or once the final tag v2.4.0 is released.

-Amanda H.

RE: Zephyr bus fault when using PSA crypto with CC310 and Openthread L2 layer

nealjack — Thu, 18 May 2023 14:20:17 GMT

Do you have any updates regarding this issue?

RE: Zephyr bus fault when using PSA crypto with CC310 and Openthread L2 layer

nealjack — Mon, 17 Apr 2023 14:19:15 GMT

I wrote too soon. The patch just fixes the key generation issue with oberon. Generating a hash and signing a hash still results in a -134 error.

RE: Zephyr bus fault when using PSA crypto with CC310 and Openthread L2 layer

nealjack — Mon, 17 Apr 2023 13:52:19 GMT

I can confirm that the patch included by zcornelius in this linked post fixes the generate keys error (-134) that I mentioned.
Both the modified crypto samples as well as my own application no longer exhibit the error when using the oberon backend.

I am still experiencing the bus fault when enabling the crypto cell with CONFIG_PSA_CRYPTO_DRIVER_CC3XX=y.

RE: Zephyr bus fault when using PSA crypto with CC310 and Openthread L2 layer

Amanda Hsieh — Fri, 14 Apr 2023 14:24:24 GMT

Hi,

We are looking into the issue. It would take time to investigate the issue. I would update the case later if I have anything to share.

Regards,
Amanda H.

RE: Zephyr bus fault when using PSA crypto with CC310 and Openthread L2 layer

nealjack — Thu, 13 Apr 2023 17:20:38 GMT

This problem is likely related to this one:
devzone.nordicsemi.com/.../psa-crypto-features-not-enabled-when-config_mbedtls_legacy_crypto_c-is-enabled