'\" t
.\"     Title: kcapi_cipher_setkey
.\"    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_CIPHER_SETKEY" "3" "November 2020" "libkcapi Manual 1\&.2\&.1" "Programming Interface"
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.SH "NAME"
kcapi_cipher_setkey \- set the key for the cipher handle
.SH "SYNOPSIS"
.HP \w'int\ kcapi_cipher_setkey('u
.BI "int kcapi_cipher_setkey(struct\ kcapi_handle\ *\ " "handle" ", const\ uint8_t\ *\ " "key" ", uint32_t\ " "keylen" ");"
.SH "ARGUMENTS"
.PP
\fIhandle\fR
.RS 4
[in] cipher handle
.RE
.PP
\fIkey\fR
.RS 4
[in] key buffer
.RE
.PP
\fIkeylen\fR
.RS 4
[in] length of key buffer
.RE
.SH "DESCRIPTION"
.PP
With this function, the caller sets the key for subsequent encryption or decryption operations\&.
.PP
After the caller provided the key, the caller may securely destroy the key as it is now maintained by the kernel\&.
.PP
\fIreturn\fR
0 upon success (in case of an akcipher handle, a positive integer is returned that denominates the maximum output size of the cryptographic operation \-\- this value must be used as the size of the output buffer for one cryptographic operation); 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