'\" t
.\"     Title: crypto_rng_seedsize
.\"    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_RNG_SEEDSIZE" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Programming Interface"
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.SH "NAME"
crypto_rng_seedsize \- obtain seed size of RNG
.SH "SYNOPSIS"
.HP \w'int\ crypto_rng_seedsize('u
.BI "int crypto_rng_seedsize(struct\ crypto_rng\ *\ " "tfm" ");"
.SH "ARGUMENTS"
.PP
\fItfm\fR
.RS 4
cipher handle
.RE
.SH "DESCRIPTION"
.PP
The function returns the seed size for the random number generator referenced by the cipher handle\&. This value may be zero if the random number generator does not implement or require a reseeding\&. For example, the SP800\-90A DRBGs implement an automated reseeding after reaching a pre\-defined threshold\&.
.SH "RETURN"
.PP
seed size for the random number generator
.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