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#ifndef __STM32_CHACHA20_H
#define __STM32_CHACHA20_H
#include <stdint.h>
#define CHACHA20_MAX_BLOCK_COUNTER 0xffffffff
#define CHACHA20_NUM_WORDS 16
#define CHACHA20_BLOCK_SIZE (CHACHA20_NUM_WORDS * 4)
struct cc20_state {
uint32_t i[CHACHA20_NUM_WORDS];
};
extern void chacha20_prng_reseed(struct cc20_state *cc, uint32_t *entropy);
extern void chacha20_prng_block(struct cc20_state *cc, uint32_t block_counter, struct cc20_state *out);
extern int chacha20_prng_self_test();
#endif /* __STM32_CHACHA20_H */
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