[capture] Enable uJSON protocol on CW305 #235
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I turns out captures with the CW305 are possible and some checks are done in CI. We just need to enable the uJSON variant and extend the tests in CI (see also #271). |
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For penetration testing, we've been using a second UART on the CW310 and the silicon platform such that the host can directly communicate with the target using the uJSON protocol instead of looping this communication through the simpleserial channel with the scope (available on Husky only anyways). This commit now adds a second UART to the English Breakfast top level such that we can re-align the capture setups again. Ultimately, this will allow removing the simpleserial-based communication which will quite notably simplify code maintenance in the future. For reference, see also lowRISC/ot-sca#235. Signed-off-by: Pirmin Vogel <[email protected]>
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For penetration testing, we've been using a second UART on the CW310 and the silicon platform such that the host can directly communicate with the target using the uJSON protocol instead of looping this communication through the simpleserial channel with the scope (available on Husky only anyways). This commit now adds a second UART to the English Breakfast top level such that we can re-align the capture setups again. Ultimately, this will allow removing the simpleserial-based communication which will quite notably simplify code maintenance in the future. For reference, see also lowRISC/ot-sca#235. Signed-off-by: Pirmin Vogel <[email protected]>
vogelpi
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For penetration testing, we've been using a second UART on the CW310 and the silicon platform such that the host can directly communicate with the target using the uJSON protocol instead of looping this communication through the simpleserial channel with the scope (available on Husky only anyways). This commit now adds a second UART to the English Breakfast top level such that we can re-align the capture setups again. Ultimately, this will allow removing the simpleserial-based communication which will quite notably simplify code maintenance in the future. For reference, see also lowRISC/ot-sca#235. Signed-off-by: Pirmin Vogel <[email protected]>
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The CW305 has a couple of advantages over the CW310/CW340 when it comes to debugging/optimizing countermeasures. However, it currently cannot be used for uJSON captures.
What needs to be done to re-enable captures with it:- [ ] Capture script and config file adjustments- [ ] Update AES binary (bitstream should still be fine) to align the software PRNG for generating the key masks (now AES according to DTR is used)- [ ] Re-enable CIFor the switch to uJSON (OpenTitan repo):
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