55 #ifndef MBEDTLS_HMAC_DRBG_H
56 #define MBEDTLS_HMAC_DRBG_H
58 #if !defined(MBEDTLS_CONFIG_FILE)
61 #include MBEDTLS_CONFIG_FILE
66 #if defined(MBEDTLS_THREADING_C)
73 #define MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG -0x0003
74 #define MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG -0x0005
75 #define MBEDTLS_ERR_HMAC_DRBG_FILE_IO_ERROR -0x0007
76 #define MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED -0x0009
86 #if !defined(MBEDTLS_HMAC_DRBG_RESEED_INTERVAL)
87 #define MBEDTLS_HMAC_DRBG_RESEED_INTERVAL 10000
90 #if !defined(MBEDTLS_HMAC_DRBG_MAX_INPUT)
91 #define MBEDTLS_HMAC_DRBG_MAX_INPUT 256
94 #if !defined(MBEDTLS_HMAC_DRBG_MAX_REQUEST)
95 #define MBEDTLS_HMAC_DRBG_MAX_REQUEST 1024
98 #if !defined(MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT)
99 #define MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT 384
104 #define MBEDTLS_HMAC_DRBG_PR_OFF 0
105 #define MBEDTLS_HMAC_DRBG_PR_ON 1
129 int (*f_entropy)(
void *,
unsigned char *, size_t);
132 #if defined(MBEDTLS_THREADING_C)
133 mbedtls_threading_mutex_t mutex;
207 int (*f_entropy)(
void *,
unsigned char *,
size_t),
209 const unsigned char *custom,
232 const unsigned char *data,
size_t data_len );
290 const unsigned char *additional,
size_t add_len );
306 const unsigned char *additional,
329 const unsigned char *additional,
size_t len );
358 unsigned char *output,
size_t output_len,
359 const unsigned char *additional,
389 #if defined(MBEDTLS_FS_IO)
421 #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)
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.
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)
This function uses HMAC_DRBG to generate random data.
Configuration options (set of defines)
int mbedtls_hmac_drbg_self_test(int verbose)
The HMAC_DRBG Checkup routine.
Threading abstraction layer.
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_update(mbedtls_hmac_drbg_context *ctx, const unsigned char *additional, size_t add_len)
HMAC_DRBG update state.
The generic message-digest wrapper.
void mbedtls_hmac_drbg_init(mbedtls_hmac_drbg_context *ctx)
HMAC_DRBG context initialization.
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)
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
mbedtls_md_context_t md_ctx
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_update_ret(mbedtls_hmac_drbg_context *ctx, const unsigned char *additional, size_t add_len)
This function updates the state of the HMAC_DRBG context.
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.