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#ifndef CHALLENGE_H
#define CHALLENGE_H 1
#include <stdint.h>
/** challenge_t: This structure contains the pseudo-random challenge used for
* authentication.
*/
typedef struct challenge_t {
/** tv_sec as returned by gettimeofday */
uint32_t sec;
/** tv_usec as returned by gettimeofday + random value */
uint32_t usec_rnd;
/** random values */
uint32_t random[6];
} __attribute__ ((packed)) challenge_t;
challenge_t* generate_challenge(void);
void generate_response(challenge_t *challenge);
int validate_challenge(challenge_t *local, challenge_t *remote);
#endif
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