.\" $OpenBSD: gzsig.1,v 1.1 2005/05/28 01:57:30 marius Exp $
.\" $Id: gzsig.1,v 1.1 2005/05/28 01:57:30 marius Exp $
.\"
.\"  Copyright (c) 2001 Dug Song <dugsong@arbor.net>
.\"  Copyright (c) 2001 Arbor Networks, Inc.
.\" 
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.\"    modification, are permitted provided that the following conditions
.\"    are met:
.\"  
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.\"    THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
.\"    INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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.\" 
.Dd July 6, 2001
.Dt GZSIG 1
.Sh NAME
.Nm gzsig
.Nd gzip signing utility
.Sh SYNOPSIS
.Nm gzsig sign
.Op Fl v
.Ar privkey
.Op Ar
.Pp
.Nm gzsig verify
.Op Fl v
.Ar pubkey
.Op Ar
.Sh DESCRIPTION
.Nm
embeds or verifies RSA PKCS #1 v2.0 or DSA SHA1 signatures in
.Xr gzip 1
compressed files using SSH2 identity keys or X509 certificates.
.Pp
The
.Ar file
operands are processed in command-line order. If 
.Ar file
is a single dash
.Pq Sq \&-
or absent,
.Nm
reads from the standard input.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Nm sign
Sign the input using the private key in
.Ar privkey .
.It Nm verify
Verify the signature using the public key in
.Ar pubkey .
.It Fl v
Enable verbose mode.
.It Fl p
Supply a passphrase for decrypting private keys when signing.
.El
.Pp
The
.Nm
utility exits 0 on success or >0 if an error occured.
.Sh EXAMPLES
.Cm gzsign sign ~/.ssh/id_rsa file1 file2
.Pp
Sign 
.Ar file1
and
.Ar file2
with the SSH2 identity key in
.Ar ~/.ssh/id_rsa .
.Pp
.Cm gzsign sign ~/.ssh/id_rsa < file1 > file2
.Pp
Sign
.Ar file1
with the SSH2 identity key, saving the signed file in
.Ar file2 .
.Pp
.Cm gzsign verify /etc/ssl/server.crt < file1
.Pp
Verify the signature on
.Ar file1
using the SSL certificate in
.Ar /etc/ssl/server.crt .
.Pp
.Sh SEE ALSO
.Xr gzip 1 ,
.Xr ssh-keygen 1 ,
.Xr ssl 8
.Sh AUTHORS
Dug Song
.Aq dugsong@arbor.net
.Pp
SSH2 support by
Marius Eriksen
.Aq marius@openbsd.org