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mbedtls_hmac_drbg_update() function
This function updates the state of the HMAC_DRBG context.
Syntax
int mbedtls_hmac_drbg_update(mbedtls_hmac_drbg_context *ctx,
const unsigned char *additional,
size_t add_len);
Implemented in ![]()
hmac_drbg.c:43
Return value
\c 0 on success, or an error from the underlying hash calculation.
Notes
This function is not thread-safe. It is not safe to call this function if another thread might be concurrently obtaining random numbers from the same context or updating or reseeding the same context.
Related Functions
Found 11 other functions taking a ![]()
mbedtls_hmac_drbg_context
argument:
Function
Description
This function resets HMAC_DRBG context to the state immediately after initial call of mbedtls_hmac_drbg_init().
HMAC_DRBG context initialization. This function makes the context ready for mbedtls_hmac_drbg_seed(), mbedtls_hmac_drbg_seed_buf() or mbedtls_hmac_drbg_free().
This function reseeds the HMAC_DRBG context, that is extracts data from the entropy source.
This function turns prediction resistance on or off. The default value is off.
This function writes a seed file.
This function sets the amount of entropy grabbed on each seed or reseed. See the documentation of mbedtls_hmac_drbg_seed() for the default value.
Set the reseed interval. The reseed interval is the number of calls to mbedtls_hmac_drbg_random() or mbedtls_hmac_drbg_random_with_add() after which the entropy function is called again. The default value is #MBEDTLS_HMAC_DRBG_RESEED_INTERVAL.
This function reads and updates a seed file. The seed is added to this instance.
References
Code
Location
Referrer
Call Tree
mbedtls_hmac_drbg_update() is called by 4 functions and calls 6 functions:
Data Use
mbedtls_hmac_drbg_update() reads 3 variables: