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#ifndef UTIL_H
#define UTIL_H
#include <stdint.h>
#include <sys/types.h>
int bin2hex(char *hex, size_t hexsize, const uint8_t *bin, size_t binlen);
int hex2bin(uint8_t *bin, size_t binsize, const char *hex, size_t hexlen);
void randombytes(uint8_t *buf, uint64_t n);
void memzero(void *ptr, size_t num);
#endif /* end of include guard: UTIL_H */
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