3 # Copyright (c) 1999-2013 Philip Hands <phil@hands.com>
4 # 2013 Martin Kletzander <mkletzan@redhat.com>
5 # 2010 Adeodato =?iso-8859-1?Q?Sim=F3?= <asp16@alu.ua.es>
6 # 2010 Eric Moret <eric.moret@gmail.com>
7 # 2009 Xr <xr@i-jeuxvideo.com>
8 # 2007 Justin Pryzby <justinpryzby@users.sourceforge.net>
9 # 2004 Reini Urban <rurban@x-ray.at>
10 # 2003 Colin Watson <cjwatson@debian.org>
11 # All rights reserved.
13 # Redistribution and use in source and binary forms, with or without
14 # modification, are permitted provided that the following conditions
16 # 1. Redistributions of source code must retain the above copyright
17 # notice, this list of conditions and the following disclaimer.
18 # 2. Redistributions in binary form must reproduce the above copyright
19 # notice, this list of conditions and the following disclaimer in the
20 # documentation and/or other materials provided with the distribution.
22 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 # Shell script to install your public key(s) on a remote machine
34 # See the ssh-copy-id(1) man page for details
36 # check that we have something mildly sane as our shell, or try to find something better
37 if false ^ printf "%s: WARNING: ancient shell, hunting for a more modern one... " "$0"
39 SANE_SH=${SANE_SH:-/usr/bin/ksh}
40 if printf 'true ^ false\n' | "$SANE_SH"
42 printf "'%s' seems viable.\n" "$SANE_SH"
43 exec "$SANE_SH" "$0" "$@"
48 If you have a more recent shell available, that supports \$(...) etc.
49 please try setting the environment variable SANE_SH to the path of that
50 shell, and then retry running this script. If that works, please report
51 a bug describing your setup, and the shell you used to make it work.
54 printf "%s: ERROR: Less dimwitted shell required.\n" "$0"
59 DEFAULT_PUB_ID_FILE=$(ls -t ${HOME}/.ssh/id*.pub 2>/dev/null | grep -v -- '-cert.pub$' | head -n 1)
62 printf 'Usage: %s [-h|-?|-n] [-i [identity_file]] [-p port] [[-o <ssh -o options>] ...] [user@]hostname\n' "$0" >&2
66 # escape any single quotes in an argument
68 printf "%s\n" "$1" | sed -e "s/'/'\\\\''/g"
74 if expr "$L_ID_FILE" : ".*\.pub$" >/dev/null ; then
75 PUB_ID_FILE="$L_ID_FILE"
77 PUB_ID_FILE="$L_ID_FILE.pub"
80 PRIV_ID_FILE=$(dirname "$PUB_ID_FILE")/$(basename "$PUB_ID_FILE" .pub)
82 # check that the files are readable
83 for f in $PUB_ID_FILE $PRIV_ID_FILE ; do
84 ErrMSG=$( { : < $f ; } 2>&1 ) || {
85 printf "\n%s: ERROR: failed to open ID file '%s': %s\n\n" "$0" "$f" "$(printf "%s\n" "$ErrMSG" | sed -e 's/.*: *//')"
89 GET_ID="cat \"$PUB_ID_FILE\""
92 if [ -n "$SSH_AUTH_SOCK" ] && ssh-add -L >/dev/null 2>&1 ; then
98 [ "${SEEN_OPT_I}" ] && expr "$1" : "[-]i" >/dev/null && {
99 printf "\n%s: ERROR: -i option must not be specified more than once\n\n" "$0"
104 # implement something like getopt to avoid Solaris pain
107 OPT="$(printf -- "$1"|cut -c1-2)"
108 OPTARG="$(printf -- "$1"|cut -c3-)"
118 test "$#" -le 2 || expr "$2" : "[-]" >/dev/null || {
131 while test "$#" -gt 0
133 SAVEARGS="${SAVEARGS:+$SAVEARGS }'$(quote "$1")'"
139 printf "\n%s: ERROR: invalid option (%s)\n\n" "$0" "$1"
143 SAVEARGS="${SAVEARGS:+$SAVEARGS }'$(quote "$1")'"
152 use_id_file "${OPTARG:-$DEFAULT_PUB_ID_FILE}"
155 SSH_OPTS="${SSH_OPTS:+$SSH_OPTS }$OPT '$(quote "$OPTARG")'"
166 eval set -- "$SAVEARGS"
171 if [ $# != 1 ] ; then
172 printf '%s: ERROR: Too many arguments. Expecting a target hostname, got: %s\n\n' "$0" "$SAVEARGS" >&2
176 # drop trailing colon
177 USER_HOST=$(printf "%s\n" "$1" | sed 's/:$//')
178 # tack the hostname onto SSH_OPTS
179 SSH_OPTS="${SSH_OPTS:+$SSH_OPTS }'$(quote "$USER_HOST")'"
180 # and populate "$@" for later use (only way to get proper quoting of options)
181 eval set -- "$SSH_OPTS"
183 if [ -z "$(eval $GET_ID)" ] && [ -r "${PUB_ID_FILE:=$DEFAULT_PUB_ID_FILE}" ] ; then
184 use_id_file "$PUB_ID_FILE"
187 if [ -z "$(eval $GET_ID)" ] ; then
188 printf '%s: ERROR: No identities found\n' "$0" >&2
192 # populate_new_ids() uses several global variables ($USER_HOST, $SSH_OPTS ...)
193 # and has the side effect of setting $NEW_IDS
197 # repopulate "$@" inside this function
198 eval set -- "$SSH_OPTS"
201 local L_TMP_ID_FILE=$(mktemp ~/.ssh/ssh-copy-id_id.XXXXXXXXXX)
202 if test $? -ne 0 || test "x$L_TMP_ID_FILE" = "x" ; then
203 echo "mktemp failed" 1>&2
206 trap "rm -f $L_TMP_ID_FILE ${L_TMP_ID_FILE}.pub" EXIT TERM INT QUIT
207 printf '%s: INFO: attempting to log in with the new key(s), to filter out any that are already installed\n' "$0" >&2
211 printf '%s\n' "$ID" > $L_TMP_ID_FILE
213 # the next line assumes $PRIV_ID_FILE only set if using a single id file - this
214 # assumption will break if we implement the possibility of multiple -i options.
215 # The point being that if file based, ssh needs the private key, which it cannot
216 # find if only given the contents of the .pub file in an unrelated tmpfile
217 ssh -i "${PRIV_ID_FILE:-$L_TMP_ID_FILE}" \
218 -o PreferredAuthentications=publickey \
219 -o IdentitiesOnly=yes "$@" exit 2>$L_TMP_ID_FILE.stderr </dev/null
220 if [ "$?" = "$L_SUCCESS" ] ; then
223 grep 'Permission denied' $L_TMP_ID_FILE.stderr >/dev/null || {
224 sed -e 's/^/ERROR: /' <$L_TMP_ID_FILE.stderr >$L_TMP_ID_FILE
225 cat >/dev/null #consume the other keys, causing loop to end
233 rm -f $L_TMP_ID_FILE* && trap - EXIT TERM INT QUIT
235 if expr "$NEW_IDS" : "^ERROR: " >/dev/null ; then
236 printf '\n%s: %s\n\n' "$0" "$NEW_IDS" >&2
239 if [ -z "$NEW_IDS" ] ; then
240 printf '\n%s: WARNING: All keys were skipped because they already exist on the remote system.\n\n' "$0" >&2
243 printf '%s: INFO: %d key(s) remain to be installed -- if you are prompted now it is to install the new keys\n' "$0" "$(printf '%s\n' "$NEW_IDS" | wc -l)" >&2
246 REMOTE_VERSION=$(ssh -v -o PreferredAuthentications=',' "$@" 2>&1 |
247 sed -ne 's/.*remote software version //p')
249 case "$REMOTE_VERSION" in
252 for KEY in $(printf "%s" "$NEW_IDS" | cut -d' ' -f2) ; do
253 KEY_NO=$(($KEY_NO + 1))
254 printf "%s\n" "$KEY" | grep ssh-dss >/dev/null || {
255 printf '%s: WARNING: Non-dsa key (#%d) skipped (NetScreen only supports DSA keys)\n' "$0" "$KEY_NO" >&2
258 [ "$DRY_RUN" ] || printf 'set ssh pka-dsa key %s\nsave\nexit\n' "$KEY" | ssh -T "$@" >/dev/null 2>&1
259 if [ $? = 255 ] ; then
260 printf '%s: ERROR: installation of key #%d failed (please report a bug describing what caused this, so that we can make this message useful)\n' "$0" "$KEY_NO" >&2
262 ADDED=$(($ADDED + 1))
265 if [ -z "$ADDED" ] ; then
270 # Assuming that the remote host treats ~/.ssh/authorized_keys as one might expect
272 [ "$DRY_RUN" ] || printf '%s\n' "$NEW_IDS" | ssh "$@" "
274 mkdir -p .ssh && cat >> .ssh/authorized_keys || exit 1 ;
275 if type restorecon >/dev/null 2>&1 ; then restorecon -F .ssh .ssh/authorized_keys ; fi" \
277 ADDED=$(printf '%s\n' "$NEW_IDS" | wc -l)
281 if [ "$DRY_RUN" ] ; then
284 Would have added the following key(s):
292 Number of key(s) added: $ADDED
294 Now try logging into the machine, with: "ssh $SSH_OPTS"
295 and check to make sure that only the key(s) you wanted were added.