'\" t
.\"     Title: struct rng_alg
.\"    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 "STRUCT RNG_ALG" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Programming Interface"
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.SH "NAME"
struct_rng_alg \- random number generator definition
.SH "SYNOPSIS"
.sp
.nf
struct rng_alg {
  int (* generate) (struct crypto_rng *tfm,const u8 *src, unsigned int slen,u8 *dst, unsigned int dlen);
  int (* seed) (struct crypto_rng *tfm, const u8 *seed, unsigned int slen);
  void (* set_ent) (struct crypto_rng *tfm, const u8 *data,unsigned int len);
  unsigned int seedsize;
  struct crypto_alg base;
};  
.fi
.SH "MEMBERS"
.PP
generate
.RS 4
The function defined by this variable obtains a random number\&. The random number generator transform must generate the random number out of the context provided with this call, plus any additional data if provided to the call\&.
.RE
.PP
seed
.RS 4
Seed or reseed the random number generator\&. With the invocation of this function call, the random number generator shall become ready for generation\&. If the random number generator requires a seed for setting up a new state, the seed must be provided by the consumer while invoking this function\&. The required size of the seed is defined with
\fIseedsize\fR
\&.
.RE
.PP
set_ent
.RS 4
Set entropy that would otherwise be obtained from entropy source\&. Internal use only\&.
.RE
.PP
seedsize
.RS 4
The seed size required for a random number generator initialization defined with this variable\&. Some random number generators does not require a seed as the seeding is implemented internally without the need of support by the consumer\&. In this case, the seed size is set to zero\&.
.RE
.PP
base
.RS 4
Common crypto API algorithm data structure\&.
.RE
.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