1#!/bin/sh
2#-
3# Copyright (c) 2012 Eitan Adler
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9# 1. Redistributions of source code must retain the above copyright
10#    notice, this list of conditions and the following disclaimer
11#    in this position and unchanged.
12# 2. Redistributions in binary form must reproduce the above copyright
13#    notice, this list of conditions and the following disclaimer in the
14#    documentation and/or other materials provided with the distribution.
15#
16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26# SUCH DAMAGE.
27#
28# $FreeBSD$
29
30usage() {
31	echo "usage: ssh-copy-id [-l] [-i keyfile] [-o option] [-p port] [user@]hostname" >&2
32	exit 1
33}
34
35sendkey() {
36	local h="$1"
37	local k="$2"
38	printf "%s\n" "$k" | ssh $port -S none $options "$user$h" /bin/sh -c \'' \
39		set -e; \
40		umask 077; \
41		keyfile=$HOME/.ssh/authorized_keys ; \
42		mkdir -p -- "$HOME/.ssh/" ; \
43		while read alg key comment ; do \
44			[ -n "$key" ] || continue; \
45			if ! grep -sqwF "$key" "$keyfile"; then \
46				printf "$alg $key $comment\n" >> "$keyfile" ; \
47			fi ; \
48		done \
49	'\' 
50}
51
52agentKeys() {
53	keys="$(ssh-add -L | grep -v 'The agent has no identities.')$nl$keys"
54}
55
56keys=""
57host=""
58hasarg=""
59user=""
60port=""
61nl="
62"
63options=""
64
65IFS=$nl
66
67while getopts 'i:lo:p:' arg; do
68	case $arg in
69	i)	
70		hasarg="x"
71		if [ -r "$OPTARG" ]; then
72			keys="$(cat -- "$OPTARG")$nl$keys"
73		else
74			echo "File $OPTARG not found" >&2
75			exit 1
76		fi
77		;;
78	l)	
79		hasarg="x"
80		agentKeys
81		;;
82	p)	
83		port=-p$nl$OPTARG
84		;;
85	o)	
86		options=$options$nl-o$nl$OPTARG
87		;;
88	*)	
89		usage
90		;;
91	esac
92done >&2
93
94shift $((OPTIND-1))
95
96if [ -z "$hasarg" ]; then
97	agentKeys
98fi
99if [ -z "$keys" ] || [ "$keys" = "$nl" ]; then
100	echo "no keys found" >&2
101	exit 1
102fi
103if [ "$#" -eq 0 ]; then
104	usage
105fi
106
107for host in "$@"; do
108	sendkey "$host" "$keys"
109done
110