.\" Copyright (C) 2009, 2014-2020 Internet Systems Consortium, Inc. ("ISC")
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.\"     Title: nsec3hash
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: 2009-03-02
.\"    Manual: BIND9
.\"    Source: ISC
.\"  Language: English
.\"
.TH "NSEC3HASH" "8" "2009\-03\-02" "ISC" "BIND9"
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.SH "NAME"
nsec3hash \- generate NSEC3 hash
.SH "SYNOPSIS"
.HP \w'\fBnsec3hash\fR\ 'u
\fBnsec3hash\fR {\fIsalt\fR} {\fIalgorithm\fR} {\fIiterations\fR} {\fIdomain\fR}
.HP \w'\fBnsec3hash\ \-r\fR\ 'u
\fBnsec3hash \-r\fR {\fIalgorithm\fR} {\fIflags\fR} {\fIiterations\fR} {\fIsalt\fR} {\fIdomain\fR}
.SH "DESCRIPTION"
.PP
\fBnsec3hash\fR
generates an NSEC3 hash based on a set of NSEC3 parameters\&. This can be used to check the validity of NSEC3 records in a signed zone\&.
.PP
If this command is invoked as
\fBnsec3hash \-r\fR, it takes arguments in an order matching the first four fields of an NSEC3 record, followed by the domain name: algorithm, flags, iterations, salt, domain\&. This makes it convenient to copy and paste a portion of an NSEC3 or NSEC3PARAM record into a command line to confirm the correctness of an NSEC3 hash\&.
.SH "ARGUMENTS"
.PP
salt
.RS 4
The salt provided to the hash algorithm\&.
.RE
.PP
algorithm
.RS 4
A number indicating the hash algorithm\&. Currently the only supported hash algorithm for NSEC3 is SHA\-1, which is indicated by the number 1; consequently "1" is the only useful value for this argument\&.
.RE
.PP
flags
.RS 4
Provided for compatibility with NSEC3 record presentation format, but ignored since the flags do not affect the hash\&.
.RE
.PP
iterations
.RS 4
The number of additional times the hash should be performed\&.
.RE
.PP
domain
.RS 4
The domain name to be hashed\&.
.RE
.SH "SEE ALSO"
.PP
BIND 9 Administrator Reference Manual,
RFC 5155\&.
.SH "AUTHOR"
.PP
\fBInternet Systems Consortium, Inc\&.\fR
.SH "COPYRIGHT"
.br
Copyright \(co 2009, 2014-2020 Internet Systems Consortium, Inc. ("ISC")
.br