mbedtls_ctr_drbg_set_entropy_len() function

The CTR_DRBG context.

The amount of entropy to grab, in bytes. This must be at most #MBEDTLS_CTR_DRBG_MAX_SEED_INPUT and at most the maximum length accepted by the entropy function that is set in the context.

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

- 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 resets CTR_DRBG context to the state immediately after initial call of mbedtls_ctr_drbg_init().

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 reseeds the CTR_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 updates the state of the CTR_DRBG context.

This function writes a seed file.

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 reads and updates a seed file. The seed is added to this instance.

Initialize the PSA DRBG.

Deinitialize the PSA DRBG.

Seed the PSA DRBG.