'\" t .\" Title: crypto_aead_authsize .\" Author: .\" Generator: DocBook XSL Stylesheets v1.79.1 .\" Date: January 2017 .\" Manual: Programming Interface .\" Source: Kernel Hackers Manual 4.8.15 .\" Language: English .\" .TH "CRYPTO_AEAD_AUTHSIZE" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Programming Interface" .\" ----------------------------------------------------------------- .\" * Define some portability stuff .\" ----------------------------------------------------------------- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" http://bugs.debian.org/507673 .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" ----------------------------------------------------------------- .\" * set default formatting .\" ----------------------------------------------------------------- .\" disable hyphenation .nh .\" disable justification (adjust text to left margin only) .ad l .\" ----------------------------------------------------------------- .\" * MAIN CONTENT STARTS HERE * .\" ----------------------------------------------------------------- .SH "NAME" crypto_aead_authsize \- obtain maximum authentication data size .SH "SYNOPSIS" .HP \w'unsigned\ int\ crypto_aead_authsize('u .BI "unsigned int crypto_aead_authsize(struct\ crypto_aead\ *\ " "tfm" ");" .SH "ARGUMENTS" .PP \fItfm\fR .RS 4 cipher handle .RE .SH "DESCRIPTION" .PP The maximum size of the authentication data for the AEAD cipher referenced by the AEAD cipher handle is returned\&. The authentication data size may be zero if the cipher implements a hard\-coded maximum\&. .PP The authentication data may also be known as \(lqtag value\(rq\&. .SH "RETURN" .PP authentication data size / tag size in bytes .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