CRYPTO_SHASH_DESCSIZ(9)               Programming Interface               CRYPTO_SHASH_DESCSIZ(9)



NAME
       crypto_shash_descsize - obtain the operational state size

SYNOPSIS
       unsigned int crypto_shash_descsize(struct crypto_shash * tfm);

ARGUMENTS
       tfm
           cipher handle

DESCRIPTION
       The size of the operational state the cipher needs during operation is returned for the
       hash referenced with the cipher handle. This size is required to calculate the memory
       requirements to allow the caller allocating sufficient memory for operational state.

       The operational state is defined with struct shash_desc where the size of that data
       structure is to be calculated as sizeof(struct shash_desc) + crypto_shash_descsize(alg)

RETURN
       size of the operational state

AUTHORS
       Stephan Mueller <smueller AT chronox.de>
           Author.

       Marek Vasut <marek AT denx.de>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   CRYPTO_SHASH_DESCSIZ(9)