3 # Copyright (c) 1999-2016 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" "$0"
59 most_recent_id="$(cd "$HOME" ; ls -t .ssh/id*.pub 2>/dev/null | grep -v -- '-cert.pub$' | head -n 1)"
60 DEFAULT_PUB_ID_FILE="${most_recent_id:+$HOME/}$most_recent_id"
63 printf 'Usage: %s [-h|-?|-f|-n] [-i [identity_file]] [-p port] [[-o <ssh -o options>] ...] [user@]hostname\n' "$0" >&2
64 printf '\t-f: force mode -- copy keys without trying to check if they are already installed\n' >&2
65 printf '\t-n: dry run -- no keys are actually copied\n' >&2
66 printf '\t-h|-?: print this help\n' >&2
70 # escape any single quotes in an argument
72 printf "%s\n" "$1" | sed -e "s/'/'\\\\''/g"
78 if [ -z "$L_ID_FILE" ] ; then
79 printf "%s: ERROR: no ID file found\n" "$0"
83 if expr "$L_ID_FILE" : ".*\.pub$" >/dev/null ; then
84 PUB_ID_FILE="$L_ID_FILE"
86 PUB_ID_FILE="$L_ID_FILE.pub"
89 [ "$FORCED" ] || PRIV_ID_FILE=$(dirname "$PUB_ID_FILE")/$(basename "$PUB_ID_FILE" .pub)
91 # check that the files are readable
92 for f in "$PUB_ID_FILE" ${PRIV_ID_FILE:+"$PRIV_ID_FILE"} ; do
93 ErrMSG=$( { : < "$f" ; } 2>&1 ) || {
95 [ "$f" = "$PRIV_ID_FILE" ] && L_PRIVMSG=" (to install the contents of '$PUB_ID_FILE' anyway, look at the -f option)"
96 printf "\n%s: ERROR: failed to open ID file '%s': %s\n" "$0" "$f" "$(printf "%s\n%s\n" "$ErrMSG" "$L_PRIVMSG" | sed -e 's/.*: *//')"
100 printf '%s: INFO: Source of key(s) to be installed: "%s"\n' "$0" "$PUB_ID_FILE" >&2
101 GET_ID="cat \"$PUB_ID_FILE\""
104 if [ -n "$SSH_AUTH_SOCK" ] && ssh-add -L >/dev/null 2>&1 ; then
108 while test "$#" -gt 0
110 [ "${SEEN_OPT_I}" ] && expr "$1" : "[-]i" >/dev/null && {
111 printf "\n%s: ERROR: -i option must not be specified more than once\n\n" "$0"
116 # implement something like getopt to avoid Solaris pain
119 OPT="$(printf -- "$1"|cut -c1-2)"
120 OPTARG="$(printf -- "$1"|cut -c3-)"
130 test "$#" -le 2 || expr "$2" : "[-]" >/dev/null || {
143 while test "$#" -gt 0
145 SAVEARGS="${SAVEARGS:+$SAVEARGS }'$(quote "$1")'"
151 printf "\n%s: ERROR: invalid option (%s)\n\n" "$0" "$1"
155 SAVEARGS="${SAVEARGS:+$SAVEARGS }'$(quote "$1")'"
164 use_id_file "${OPTARG:-$DEFAULT_PUB_ID_FILE}"
167 SSH_OPTS="${SSH_OPTS:+$SSH_OPTS }$OPT '$(quote "$OPTARG")'"
181 eval set -- "$SAVEARGS"
186 if [ $# != 1 ] ; then
187 printf '%s: ERROR: Too many arguments. Expecting a target hostname, got: %s\n\n' "$0" "$SAVEARGS" >&2
191 # drop trailing colon
192 USER_HOST=$(printf "%s\n" "$1" | sed 's/:$//')
193 # tack the hostname onto SSH_OPTS
194 SSH_OPTS="${SSH_OPTS:+$SSH_OPTS }'$(quote "$USER_HOST")'"
195 # and populate "$@" for later use (only way to get proper quoting of options)
196 eval set -- "$SSH_OPTS"
198 if [ -z "$(eval $GET_ID)" ] && [ -r "${PUB_ID_FILE:=$DEFAULT_PUB_ID_FILE}" ] ; then
199 use_id_file "$PUB_ID_FILE"
202 if [ -z "$(eval $GET_ID)" ] ; then
203 printf '%s: ERROR: No identities found\n' "$0" >&2
207 # populate_new_ids() uses several global variables ($USER_HOST, $SSH_OPTS ...)
208 # and has the side effect of setting $NEW_IDS
212 if [ "$FORCED" ] ; then
213 NEW_IDS=$(eval $GET_ID)
217 # repopulate "$@" inside this function
218 eval set -- "$SSH_OPTS"
221 local L_TMP_ID_FILE=$(mktemp ~/.ssh/ssh-copy-id_id.XXXXXXXXXX)
222 if test $? -ne 0 || test "x$L_TMP_ID_FILE" = "x" ; then
223 printf '%s: ERROR: mktemp failed\n' "$0" >&2
226 local L_CLEANUP="rm -f \"$L_TMP_ID_FILE\" \"${L_TMP_ID_FILE}.stderr\""
227 trap "$L_CLEANUP" EXIT TERM INT QUIT
228 printf '%s: INFO: attempting to log in with the new key(s), to filter out any that are already installed\n' "$0" >&2
231 while read ID || [ "$ID" ] ; do
232 printf '%s\n' "$ID" > "$L_TMP_ID_FILE"
234 # the next line assumes $PRIV_ID_FILE only set if using a single id file - this
235 # assumption will break if we implement the possibility of multiple -i options.
236 # The point being that if file based, ssh needs the private key, which it cannot
237 # find if only given the contents of the .pub file in an unrelated tmpfile
238 ssh -i "${PRIV_ID_FILE:-$L_TMP_ID_FILE}" \
239 -o ControlPath=none \
241 -o PreferredAuthentications=publickey \
242 -o IdentitiesOnly=yes "$@" exit 2>"$L_TMP_ID_FILE.stderr" </dev/null
243 if [ "$?" = "$L_SUCCESS" ] ; then
246 grep 'Permission denied' "$L_TMP_ID_FILE.stderr" >/dev/null || {
247 sed -e 's/^/ERROR: /' <"$L_TMP_ID_FILE.stderr" >"$L_TMP_ID_FILE"
248 cat >/dev/null #consume the other keys, causing loop to end
256 eval "$L_CLEANUP" && trap - EXIT TERM INT QUIT
258 if expr "$NEW_IDS" : "^ERROR: " >/dev/null ; then
259 printf '\n%s: %s\n\n' "$0" "$NEW_IDS" >&2
262 if [ -z "$NEW_IDS" ] ; then
263 printf '\n%s: WARNING: All keys were skipped because they already exist on the remote system.\n' "$0" >&2
264 printf '\t\t(if you think this is a mistake, you may want to use -f option)\n\n' >&2
267 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' "$NEW_IDS" | wc -l)" >&2
270 REMOTE_VERSION=$(ssh -v -o PreferredAuthentications=',' -o ControlPath=none "$@" 2>&1 |
271 sed -ne 's/.*remote software version //p')
273 case "$REMOTE_VERSION" in
276 for KEY in $(printf "%s" "$NEW_IDS" | cut -d' ' -f2) ; do
277 KEY_NO=$(($KEY_NO + 1))
278 printf "%s\n" "$KEY" | grep ssh-dss >/dev/null || {
279 printf '%s: WARNING: Non-dsa key (#%d) skipped (NetScreen only supports DSA keys)\n' "$0" "$KEY_NO" >&2
282 [ "$DRY_RUN" ] || printf 'set ssh pka-dsa key %s\nsave\nexit\n' "$KEY" | ssh -T "$@" >/dev/null 2>&1
283 if [ $? = 255 ] ; then
284 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
286 ADDED=$(($ADDED + 1))
289 if [ -z "$ADDED" ] ; then
294 # Assuming that the remote host treats ~/.ssh/authorized_keys as one might expect
296 # in ssh below - to defend against quirky remote shells: use 'exec sh -c' to get POSIX;
297 # 'cd' to be at $HOME; add a newline if it's missing; and all on one line, because tcsh.
298 [ "$DRY_RUN" ] || printf '%s\n' "$NEW_IDS" | \
299 ssh "$@" "exec sh -c 'cd ; umask 077 ; mkdir -p .ssh && { [ -z "'`tail -1c .ssh/authorized_keys 2>/dev/null`'" ] || echo >> .ssh/authorized_keys ; } && cat >> .ssh/authorized_keys || exit 1 ; if type restorecon >/dev/null 2>&1 ; then restorecon -F .ssh .ssh/authorized_keys ; fi'" \
301 ADDED=$(printf '%s\n' "$NEW_IDS" | wc -l)
305 if [ "$DRY_RUN" ] ; then
308 Would have added the following key(s):
316 Number of key(s) added: $ADDED
318 Now try logging into the machine, with: "ssh $SSH_OPTS"
319 and check to make sure that only the key(s) you wanted were added.