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path: root/src/cc20rng/stm32f4xx_it.h
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2019-12-18WIP Revamp ChaCha20 seedingln/cc20rng-revampLinus Nordberg
- 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
2016-11-21add RNG using ChaCha20 as CSPRNGFredrik Thulin