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_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.
#define MBEDTLS_MD_MAX_SIZE
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_reseed_interval(mbedtls_hmac_drbg_context *ctx, int interval)
Set the reseed interval.
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_random(void *p_rng, unsigned char *output, size_t out_len)
This function uses HMAC_DRBG to generate random data.
#define MBEDTLS_PRIVATE(member)
int mbedtls_hmac_drbg_self_test(int verbose)
The HMAC_DRBG Checkup routine.
Threading abstraction layer.
struct mbedtls_hmac_drbg_context mbedtls_hmac_drbg_context
Macro wrapper for struct's members.
Build-time configuration info.
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.
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.
This file contains the generic functions for message-digest (hashing) and HMAC.
void mbedtls_hmac_drbg_init(mbedtls_hmac_drbg_context *ctx)
HMAC_DRBG context initialization.
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_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...
struct mbedtls_md_info_t mbedtls_md_info_t
int mbedtls_hmac_drbg_write_seed_file(mbedtls_hmac_drbg_context *ctx, const char *path)
This function writes a seed file.
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.
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.