'\" t
.\"     Title: crypto_shash_descsize
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Programming Interface
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "CRYPTO_SHASH_DESCSIZ" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Programming Interface"
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.SH "NAME"
crypto_shash_descsize \- obtain the operational state size
.SH "SYNOPSIS"
.HP \w'unsigned\ int\ crypto_shash_descsize('u
.BI "unsigned int crypto_shash_descsize(struct\ crypto_shash\ *\ " "tfm" ");"
.SH "ARGUMENTS"
.PP
\fItfm\fR
.RS 4
cipher handle
.RE
.SH "DESCRIPTION"
.PP
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\&.
.PP
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)
.SH "RETURN"
.PP
size of the operational state
.SH "AUTHORS"
.PP
\fBStephan Mueller\fR <\&smueller@chronox.de\&>
.RS 4
Author.
.RE
.PP
\fBMarek Vasut\fR <\&marek@denx.de\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br