'\" t
.\"     Title: struct hash_alg_common
.\"    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 HASH_ALG_COMM" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Programming Interface"
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.SH "NAME"
struct_hash_alg_common \- define properties of message digest
.SH "SYNOPSIS"
.sp
.nf
struct hash_alg_common {
  unsigned int digestsize;
  unsigned int statesize;
  struct crypto_alg base;
};  
.fi
.SH "MEMBERS"
.PP
digestsize
.RS 4
Size of the result of the transformation\&. A buffer of this size must be available to the
\fIfinal\fR
and
\fIfinup\fR
calls, so they can store the resulting hash into it\&. For various predefined sizes, search include/crypto/ using git grep _DIGEST_SIZE include/crypto\&.
.RE
.PP
statesize
.RS 4
Size of the block for partial state of the transformation\&. A buffer of this size must be passed to the
\fIexport\fR
function as it will save the partial state of the transformation into it\&. On the other side, the
\fIimport\fR
function will load the state from a buffer of this size as well\&.
.RE
.PP
base
.RS 4
Start of data structure of cipher algorithm\&. The common data structure of crypto_alg contains information common to all ciphers\&. The hash_alg_common data structure now adds the hash\-specific information\&.
.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