'\" t
.\"     Title: kcapi_pbkdf
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: November 2020
.\"    Manual: Programming Interface
.\"    Source: libkcapi Manual 1.2.1
.\"  Language: English
.\"
.TH "KCAPI_PBKDF" "3" "November 2020" "libkcapi Manual 1\&.2\&.1" "Programming Interface"
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.SH "NAME"
kcapi_pbkdf \- Password\-based Key Derivation Function
.SH "SYNOPSIS"
.HP \w'int32_t\ kcapi_pbkdf('u
.BI "int32_t kcapi_pbkdf(const\ char\ *\ " "hashname" ", const\ uint8_t\ *\ " "pw" ", uint32_t\ " "pwlen" ", const\ uint8_t\ *\ " "salt" ", uint32_t\ " "saltlen" ", uint32_t\ " "count" ", uint8_t\ *\ " "key" ", uint32_t\ " "keylen" ");"
.SH "ARGUMENTS"
.PP
\fIhashname\fR
.RS 4
[in] kernel crypto API name of a keyed hash (e\&.g\&. hmac(sha1))
.RE
.PP
\fIpw\fR
.RS 4
[in] Password a key shall be derived from
.RE
.PP
\fIpwlen\fR
.RS 4
[in] Length of password string
.RE
.PP
\fIsalt\fR
.RS 4
[in] Salt as defined in SP800\-132
.RE
.PP
\fIsaltlen\fR
.RS 4
[in] Length of salt buffer
.RE
.PP
\fIcount\fR
.RS 4
[in] Numbers of iterations to be performed for the PBKDF
.RE
.PP
\fIkey\fR
.RS 4
[out] Buffer to store the generated key in
.RE
.PP
\fIkeylen\fR
.RS 4
[in] Size of the key to be generated (i\&.e\&. length of the key buffer)
.RE
.SH "DESCRIPTION"
.PP
This function is an implementation of the PBKDF as defined in SP800\-132\&.
.PP
\fIreturn\fR
0 upon success; a negative errno\-style error code if an error occurred
.SH "AUTHOR"
.PP
\fBStephan Mueller\fR <\&smueller@chronox.de\&>
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br