The CTR_DRBG context structure. More...

#include <ctr_drbg.h>

Data Fields
unsigned char	counter [16]

int	reseed_counter

int	prediction_resistance

size_t	entropy_len

int	reseed_interval

mbedtls_aes_context	aes_ctx

int(*	f_entropy )(void , unsigned char , size_t)

void *	p_entropy

Detailed Description

The CTR_DRBG context structure.

Definition at line 176 of file ctr_drbg.h.

Field Documentation

◆ counter

unsigned char counter[16]

The counter (V).

Definition at line 178 of file ctr_drbg.h.

◆ reseed_counter

int reseed_counter

The reseed counter. This is the number of requests that have been made since the last (re)seeding, minus one. Before the initial seeding, this field contains the amount of entropy in bytes to use as a nonce for the initial seeding, or -1 if no nonce length has been explicitly set (see mbedtls_ctr_drbg_set_nonce_len()).

Definition at line 179 of file ctr_drbg.h.

◆ prediction_resistance

int prediction_resistance

This determines whether prediction resistance is enabled, that is whether to systematically reseed before each random generation.

Definition at line 189 of file ctr_drbg.h.

◆ entropy_len

size_t entropy_len

The amount of entropy grabbed on each seed or reseed operation, in bytes.

Definition at line 193 of file ctr_drbg.h.

◆ reseed_interval

int reseed_interval

The reseed interval. This is the maximum number of requests that can be made between reseedings.

Definition at line 195 of file ctr_drbg.h.

◆ aes_ctx

mbedtls_aes_context aes_ctx

The AES context.

Definition at line 199 of file ctr_drbg.h.

◆ f_entropy

int(* f_entropy) (void *, unsigned char *, size_t)

The entropy callback function.

Definition at line 204 of file ctr_drbg.h.

◆ p_entropy

void* p_entropy

The context for the entropy function.

Definition at line 207 of file ctr_drbg.h.

Data Fields