14#ifndef MBEDTLS_HMAC_DRBG_H
15#define MBEDTLS_HMAC_DRBG_H
22#if defined(MBEDTLS_THREADING_C)
30#define MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG -0x0003
32#define MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG -0x0005
34#define MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR -0x0007
36#define MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED -0x0009
46#if !defined(MBEDTLS_HMAC_DRBG_RESEED_INTERVAL)
47#define MBEDTLS_HMAC_DRBG_RESEED_INTERVAL 10000
50#if !defined(MBEDTLS_HMAC_DRBG_MAX_INPUT)
51#define MBEDTLS_HMAC_DRBG_MAX_INPUT 256
54#if !defined(MBEDTLS_HMAC_DRBG_MAX_REQUEST)
55#define MBEDTLS_HMAC_DRBG_MAX_REQUEST 1024
58#if !defined(MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT)
59#define MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT 384
64#define MBEDTLS_HMAC_DRBG_PR_OFF 0
65#define MBEDTLS_HMAC_DRBG_PR_ON 1
91#if defined(MBEDTLS_THREADING_C)
150#if defined(MBEDTLS_THREADING_C)
188 int (*f_entropy)(
void *,
unsigned char *,
size_t),
190 const unsigned char *custom,
199#if defined(MBEDTLS_THREADING_C)
223 const unsigned char *data,
size_t data_len);
286 const unsigned char *additional,
size_t add_len);
313 const unsigned char *additional,
size_t len);
347 unsigned char *output,
size_t output_len,
348 const unsigned char *additional,
357#if defined(MBEDTLS_THREADING_C)
388#if defined(MBEDTLS_FS_IO)
420#if defined(MBEDTLS_SELF_TEST)
int mbedtls_hmac_drbg_update_seed_file(mbedtls_hmac_drbg_context *ctx, const char *path)
This function reads and updates a seed file. The seed is added to this instance.
void mbedtls_hmac_drbg_set_prediction_resistance(mbedtls_hmac_drbg_context *ctx, int resistance)
This function turns prediction resistance on or off. The default value is off.
int mbedtls_hmac_drbg_seed(mbedtls_hmac_drbg_context *ctx, const mbedtls_md_info_t *md_info, int(*f_entropy)(void *, unsigned char *, size_t), void *p_entropy, const unsigned char *custom, size_t len)
HMAC_DRBG initial seeding.
int mbedtls_hmac_drbg_reseed(mbedtls_hmac_drbg_context *ctx, const unsigned char *additional, size_t len)
This function reseeds the HMAC_DRBG context, that is extracts data from the entropy source.
void mbedtls_hmac_drbg_init(mbedtls_hmac_drbg_context *ctx)
HMAC_DRBG context initialization.
void mbedtls_hmac_drbg_set_reseed_interval(mbedtls_hmac_drbg_context *ctx, int interval)
Set the reseed interval.
int mbedtls_hmac_drbg_self_test(int verbose)
The HMAC_DRBG Checkup routine.
void mbedtls_hmac_drbg_free(mbedtls_hmac_drbg_context *ctx)
This function resets HMAC_DRBG context to the state immediately after initial call of mbedtls_hmac_dr...
int mbedtls_hmac_drbg_seed_buf(mbedtls_hmac_drbg_context *ctx, const mbedtls_md_info_t *md_info, const unsigned char *data, size_t data_len)
Initialisation of simplified HMAC_DRBG (never reseeds).
void mbedtls_hmac_drbg_set_entropy_len(mbedtls_hmac_drbg_context *ctx, size_t len)
This function sets the amount of entropy grabbed on each seed or reseed.
int mbedtls_hmac_drbg_write_seed_file(mbedtls_hmac_drbg_context *ctx, const char *path)
This function writes a seed file.
int mbedtls_hmac_drbg_random_with_add(void *p_rng, unsigned char *output, size_t output_len, const unsigned char *additional, size_t add_len)
This function updates an HMAC_DRBG instance with additional data and uses it to generate random data.
int mbedtls_hmac_drbg_random(void *p_rng, unsigned char *output, size_t out_len)
This function uses HMAC_DRBG to generate random data.
int mbedtls_hmac_drbg_update(mbedtls_hmac_drbg_context *ctx, const unsigned char *additional, size_t add_len)
This function updates the state of the HMAC_DRBG context.
struct mbedtls_hmac_drbg_context mbedtls_hmac_drbg_context
Build-time configuration info.
This file contains the generic functions for message-digest (hashing) and HMAC.
struct mbedtls_md_info_t mbedtls_md_info_t
#define MBEDTLS_MD_MAX_SIZE
Macro wrapper for struct's members.
#define MBEDTLS_PRIVATE(member)
Threading abstraction layer.