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/* ctr_prng.h - TinyCrypt interface to an CTR-PRNG implementation */
#ifndef __TC_CTR_PRNG_H__
#define __TC_CTR_PRNG_H__
#include <tinycrypt/aes.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct
{
/* updated each time another BLOCKLEN_BYTES bytes are produced */
uint8_t V[TC_AES_BLOCK_SIZE];
/* updated whenever the PRNG is reseeded */
struct tc_aes_key_sched_struct key;
/* number of requests since initialisation/reseeding */
uint64_t reseedCount;
} TCCtrPrng_t;
//todo comment
int32_t tc_ctr_prng_init(TCCtrPrng_t * const ctx,
uint8_t const entropy[],
uint32_t entropyLen,
uint8_t const personalization[],
uint32_t pLen);
//todo comment
int32_t tc_ctr_prng_reseed(TCCtrPrng_t * const ctx,
uint8_t const entropy[],
uint32_t entropyLen);
int32_t tc_ctr_prng_generate(TCCtrPrng_t * const ctx,
uint8_t out[],
uint32_t outlen);
#ifdef __cplusplus
}
#endif
#endif
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