mbedtls_ctr_drbg_free() function

The CTR_DRBG context to clear.

This function initializes the CTR_DRBG context, and prepares it for mbedtls_ctr_drbg_seed() or mbedtls_ctr_drbg_free().

This function updates the state of the CTR_DRBG context.

This function reseeds the CTR_DRBG context, that is extracts data from the entropy source.

- The \p custom string. In addition, if you do not pass a nonce in \p custom, the sum of the entropy length and the entropy nonce length must be: - at least 24 bytes for a 128-bit strength (maximum achievable strength when using AES-128); - at least 48 bytes for a 256-bit strength (maximum achievable strength when using AES-256).

This function sets the amount of entropy grabbed as a nonce for the initial seeding. Call this function before calling mbedtls_ctr_drbg_seed() to read a nonce from the entropy source during the initial seeding.

This function sets the reseed interval. The reseed interval is the number of calls to mbedtls_ctr_drbg_random() or mbedtls_ctr_drbg_random_with_add() after which the entropy function is called again. The default value is #MBEDTLS_CTR_DRBG_RESEED_INTERVAL.

This function turns prediction resistance on or off. The default value is off.

This function sets the amount of entropy grabbed on each seed or reseed. The default value is #MBEDTLS_CTR_DRBG_ENTROPY_LEN.