[riot-notifications] [RIOT-OS/RIOT] drivers/at86rf2xx; spi security module (AES) (#14113)

fabian18 notifications at github.com
Thu May 21 19:07:26 CEST 2020


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### Contribution description
The at86rf2xx IEEE 802.15.4 transceivers are capable to perform `AES` in hardware and support block cipher modes `ECB` and `CBC`.

This PR adds a `pseudomodule` in the `at86rf2xx` driver. You will be able to perform hardware encryption and decryption of blocks of data using `ECB` and `CBC` block ciphers. Nothing is changed from the actual driver.

Only `SPI` transceivers are supported, for now. Although for MCU integrated transceivers `atmega128rfa1` and `atmega256rfr2` it is even simpler and could be added later.
The SPI security module supports `fast SPI`, which means that you will read output block `i`, if you write input block `i + 1` to the SPI bus.

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### Testing procedure
I provided a test in `tests/driver_at86rf2xx_aes/`.
Test vectors are taken from: [RFC3602](https://tools.ietf.org/html/rfc3602)
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### Issues/PRs references

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None
You can view, comment on, or merge this pull request online at:

  https://github.com/RIOT-OS/RIOT/pull/14113

-- Commit Summary --

  * drivers/at86rf2xx: SPI AES security module
  * tests/driver_at86rf2xx_aes: Test for at86rf2xx AES security module

-- File Changes --

    M drivers/at86rf2xx/Makefile (6)
    A drivers/at86rf2xx/aes_spi.c (432)
    A drivers/at86rf2xx/include/at86rf2xx_aes.h (259)
    M makefiles/pseudomodules.inc.mk (1)
    A tests/driver_at86rf2xx_aes/Makefile (23)
    A tests/driver_at86rf2xx_aes/main.c (230)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/14113.patch
https://github.com/RIOT-OS/RIOT/pull/14113.diff

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