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authorLinus Nordberg <linus@nordberg.se>2019-12-18 23:36:25 +0100
committerLinus Nordberg <linus@nordberg.se>2019-12-18 23:36:25 +0100
commite47310c3d5ef6fc10e60562d2d88da0927bc1fce (patch)
treee5120a2cbfb18deeca95c6670dfd3216745d4d8c /Drivers/CMSIS/Device/ST/STM32F4xx/Release_Notes.html
parentbef34ab8ac602d36d86b4a3f3013b89e3e2e5402 (diff)
WIP Revamp ChaCha20 seedingln/cc20rng-revamp
- chacha20_prng_block() uses counter in the state struct - chacha20_setup() replaces chacha20_prng_reseed() and fills the whole state struct, fixing a bug where only half of the key was being set; as a result of 'counter' being set, a state struct filled with entropy from the TRNG makes reseeding occur after a random number of rounds instead of after a fixed 2^32-1 rounds - decrementing of the block counter is done in chacha20_prng_block() - chacha output is copied to buf _after_ the interrupt driven transmission of buf to UART has finished, to stop the race between reading and refilling of buf
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