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logicog
bd84a542ff
Add an implementation in 8051 assembler for the generation of a ChaCha20 keystream and an encryption function using the keystream in C. A test function using the example from RFC7539 is provided in chacha20_test. Keys, nonce, and block counter and the pointers to the input plaintext, its length and the output pointer are provided via a struct chacha20, which also holds the working state of the ChaCha20 algorithm