23 #ifndef MBEDTLS_HMAC_DRBG_H
24 #define MBEDTLS_HMAC_DRBG_H
28 #if defined(MBEDTLS_THREADING_C)
35 #define MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG -0x0003
36 #define MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG -0x0005
37 #define MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR -0x0007
38 #define MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED -0x0009
48 #if !defined(MBEDTLS_HMAC_DRBG_RESEED_INTERVAL)
49 #define MBEDTLS_HMAC_DRBG_RESEED_INTERVAL 10000
52 #if !defined(MBEDTLS_HMAC_DRBG_MAX_INPUT)
53 #define MBEDTLS_HMAC_DRBG_MAX_INPUT 256
56 #if !defined(MBEDTLS_HMAC_DRBG_MAX_REQUEST)
57 #define MBEDTLS_HMAC_DRBG_MAX_REQUEST 1024
60 #if !defined(MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT)
61 #define MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT 384
66 #define MBEDTLS_HMAC_DRBG_PR_OFF 0
67 #define MBEDTLS_HMAC_DRBG_PR_ON 1
91 int (*f_entropy)(
void *,
unsigned char *, size_t);
94 #if defined(MBEDTLS_THREADING_C)
95 mbedtls_threading_mutex_t mutex;
135 int (*f_entropy)(
void *,
unsigned char *,
size_t),
137 const unsigned char *custom,
155 const unsigned char *data,
size_t data_len );
201 const unsigned char *additional,
size_t add_len );
214 const unsigned char *additional,
size_t len );
233 unsigned char *output,
size_t output_len,
234 const unsigned char *additional,
259 #if defined(MBEDTLS_FS_IO)
286 #if defined(MBEDTLS_SELF_TEST)
292 int mbedtls_hmac_drbg_self_test(
int verbose );
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 Seed and setup entropy source for future reseeds.
#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)
Initilisation of simpified HMAC_DRBG (never reseeds).
void mbedtls_hmac_drbg_set_reseed_interval(mbedtls_hmac_drbg_context *ctx, int interval)
Set the reseed interval (Default: MBEDTLS_HMAC_DRBG_RESEED_INTERVAL)
void mbedtls_hmac_drbg_free(mbedtls_hmac_drbg_context *ctx)
Free an HMAC_DRBG context.
int mbedtls_hmac_drbg_random(void *p_rng, unsigned char *output, size_t out_len)
HMAC_DRBG generate random.
Generic message digest context.
Threading abstraction layer.
void mbedtls_hmac_drbg_update(mbedtls_hmac_drbg_context *ctx, const unsigned char *additional, size_t add_len)
HMAC_DRBG update state.
Generic message digest wrapper.
void mbedtls_hmac_drbg_init(mbedtls_hmac_drbg_context *ctx)
HMAC_DRBG context initialization Makes the context ready for mbedtls_hmac_drbg_seed(), mbedtls_hmac_drbg_seed_buf() or mbedtls_hmac_drbg_free().
int prediction_resistance
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)
HMAC_DRBG generate random with additional update input.
int mbedtls_hmac_drbg_reseed(mbedtls_hmac_drbg_context *ctx, const unsigned char *additional, size_t len)
HMAC_DRBG reseeding (extracts data from entropy source)
Message digest information.
mbedtls_md_context_t md_ctx
void mbedtls_hmac_drbg_set_entropy_len(mbedtls_hmac_drbg_context *ctx, size_t len)
Set the amount of entropy grabbed on each reseed (Default: given by the security strength, which depends on the hash used, see mbedtls_hmac_drbg_init() )
void mbedtls_hmac_drbg_set_prediction_resistance(mbedtls_hmac_drbg_context *ctx, int resistance)
Enable / disable prediction resistance (Default: Off)