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diff --git a/contrib/ssh-copy-id b/contrib/ssh-copy-id
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+#!/bin/sh
+
+# Copyright (c) 1999-2020 Philip Hands <phil@hands.com>
+# 2017 Sebastien Boyron <seb@boyron.eu>
+# 2013 Martin Kletzander <mkletzan@redhat.com>
+# 2010 Adeodato =?iso-8859-1?Q?Sim=F3?= <asp16@alu.ua.es>
+# 2010 Eric Moret <eric.moret@gmail.com>
+# 2009 Xr <xr@i-jeuxvideo.com>
+# 2007 Justin Pryzby <justinpryzby@users.sourceforge.net>
+# 2004 Reini Urban <rurban@x-ray.at>
+# 2003 Colin Watson <cjwatson@debian.org>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Shell script to install your public key(s) on a remote machine
+# See the ssh-copy-id(1) man page for details
+
+# shellcheck shell=dash
+
+# check that we have something mildly sane as our shell, or try to find something better
+if false ^ printf "%s: WARNING: ancient shell, hunting for a more modern one... " "$0"
+then
+ SANE_SH=${SANE_SH:-/usr/bin/ksh}
+ if printf 'true ^ false\n' | "$SANE_SH"
+ then
+ printf "'%s' seems viable.\\n" "$SANE_SH"
+ exec "$SANE_SH" "$0" "$@"
+ else
+ cat <<-EOF
+ oh dear.
+
+ If you have a more recent shell available, that supports \$(...) etc.
+ please try setting the environment variable SANE_SH to the path of that
+ shell, and then retry running this script. If that works, please report
+ a bug describing your setup, and the shell you used to make it work.
+
+ EOF
+ printf '%s: ERROR: Less dimwitted shell required.\n' "$0"
+ exit 1
+ fi
+fi
+
+# shellcheck disable=SC2010
+DEFAULT_PUB_ID_FILE=$(ls -t "${HOME}"/.ssh/id*.pub 2>/dev/null | grep -v -- '-cert.pub$' | head -n 1)
+
+usage () {
+ printf 'Usage: %s [-h|-?|-f|-n] [-i [identity_file]] [-p port] [-F alternative ssh_config file] [[-o <ssh -o options>] ...] [user@]hostname\n' "$0" >&2
+ printf '\t-f: force mode -- copy keys without trying to check if they are already installed\n' >&2
+ printf '\t-n: dry run -- no keys are actually copied\n' >&2
+ printf '\t-h|-?: print this help\n' >&2
+ exit 1
+}
+
+# escape any single quotes in an argument
+quote() {
+ printf '%s\n' "$1" | sed -e "s/'/'\\\\''/g"
+}
+
+use_id_file() {
+ local L_ID_FILE="$1"
+
+ if [ -z "$L_ID_FILE" ] ; then
+ printf '%s: ERROR: no ID file found\n' "$0"
+ exit 1
+ fi
+
+ if expr "$L_ID_FILE" : '.*\.pub$' >/dev/null ; then
+ PUB_ID_FILE="$L_ID_FILE"
+ else
+ PUB_ID_FILE="$L_ID_FILE.pub"
+ fi
+
+ [ "$FORCED" ] || PRIV_ID_FILE=$(dirname "$PUB_ID_FILE")/$(basename "$PUB_ID_FILE" .pub)
+
+ # check that the files are readable
+ for f in "$PUB_ID_FILE" ${PRIV_ID_FILE:+"$PRIV_ID_FILE"} ; do
+ ErrMSG=$( { : < "$f" ; } 2>&1 ) || {
+ local L_PRIVMSG=""
+ [ "$f" = "$PRIV_ID_FILE" ] && L_PRIVMSG=" (to install the contents of '$PUB_ID_FILE' anyway, look at the -f option)"
+ 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/.*: *//')"
+ exit 1
+ }
+ done
+ printf '%s: INFO: Source of key(s) to be installed: "%s"\n' "$0" "$PUB_ID_FILE" >&2
+ GET_ID="cat \"$PUB_ID_FILE\""
+}
+
+if [ -n "$SSH_AUTH_SOCK" ] && ssh-add -L >/dev/null 2>&1 ; then
+ GET_ID="ssh-add -L"
+fi
+
+while getopts "i:o:p:F:fnh?" OPT
+do
+
+ case "$OPT" in
+ i)
+ [ "${SEEN_OPT_I}" ] && {
+ printf '\n%s: ERROR: -i option must not be specified more than once\n\n' "$0"
+ usage
+ }
+ SEEN_OPT_I="yes"
+ use_id_file "${OPTARG:-$DEFAULT_PUB_ID_FILE}"
+ ;;
+ o|p|F)
+ SSH_OPTS="${SSH_OPTS:+$SSH_OPTS }-$OPT '$(quote "${OPTARG}")'"
+ ;;
+ f)
+ FORCED=1
+ ;;
+ n)
+ DRY_RUN=1
+ ;;
+ h|\?)
+ usage
+ ;;
+ esac
+done
+#shift all args to keep only USER_HOST
+shift $((OPTIND-1))
+
+
+
+
+if [ $# = 0 ] ; then
+ usage
+fi
+if [ $# != 1 ] ; then
+ printf '%s: ERROR: Too many arguments. Expecting a target hostname, got: %s\n\n' "$0" "$SAVEARGS" >&2
+ usage
+fi
+
+# drop trailing colon
+USER_HOST="$*"
+# tack the hostname onto SSH_OPTS
+SSH_OPTS="${SSH_OPTS:+$SSH_OPTS }'$(quote "$USER_HOST")'"
+# and populate "$@" for later use (only way to get proper quoting of options)
+eval set -- "$SSH_OPTS"
+
+# shellcheck disable=SC2086
+if [ -z "$(eval $GET_ID)" ] && [ -r "${PUB_ID_FILE:=$DEFAULT_PUB_ID_FILE}" ] ; then
+ use_id_file "$PUB_ID_FILE"
+fi
+
+# shellcheck disable=SC2086
+if [ -z "$(eval $GET_ID)" ] ; then
+ printf '%s: ERROR: No identities found\n' "$0" >&2
+ exit 1
+fi
+
+# populate_new_ids() uses several global variables ($USER_HOST, $SSH_OPTS ...)
+# and has the side effect of setting $NEW_IDS
+populate_new_ids() {
+ local L_SUCCESS="$1"
+
+ # shellcheck disable=SC2086
+ if [ "$FORCED" ] ; then
+ NEW_IDS=$(eval $GET_ID)
+ return
+ fi
+
+ # repopulate "$@" inside this function
+ eval set -- "$SSH_OPTS"
+
+ umask 0177
+ local L_TMP_ID_FILE
+ L_TMP_ID_FILE=$(mktemp ~/.ssh/ssh-copy-id_id.XXXXXXXXXX)
+ if test $? -ne 0 || test "x$L_TMP_ID_FILE" = "x" ; then
+ printf '%s: ERROR: mktemp failed\n' "$0" >&2
+ exit 1
+ fi
+ local L_CLEANUP="rm -f \"$L_TMP_ID_FILE\" \"${L_TMP_ID_FILE}.stderr\""
+ # shellcheck disable=SC2064
+ trap "$L_CLEANUP" EXIT TERM INT QUIT
+ printf '%s: INFO: attempting to log in with the new key(s), to filter out any that are already installed\n' "$0" >&2
+ # shellcheck disable=SC2086
+ NEW_IDS=$(
+ eval $GET_ID | {
+ while read -r ID || [ "$ID" ] ; do
+ printf '%s\n' "$ID" > "$L_TMP_ID_FILE"
+
+ # the next line assumes $PRIV_ID_FILE only set if using a single id file - this
+ # assumption will break if we implement the possibility of multiple -i options.
+ # The point being that if file based, ssh needs the private key, which it cannot
+ # find if only given the contents of the .pub file in an unrelated tmpfile
+ ssh -i "${PRIV_ID_FILE:-$L_TMP_ID_FILE}" \
+ -o ControlPath=none \
+ -o LogLevel=INFO \
+ -o PreferredAuthentications=publickey \
+ -o IdentitiesOnly=yes "$@" exit 2>"$L_TMP_ID_FILE.stderr" </dev/null
+ if [ "$?" = "$L_SUCCESS" ] ; then
+ : > "$L_TMP_ID_FILE"
+ else
+ grep 'Permission denied' "$L_TMP_ID_FILE.stderr" >/dev/null || {
+ sed -e 's/^/ERROR: /' <"$L_TMP_ID_FILE.stderr" >"$L_TMP_ID_FILE"
+ cat >/dev/null #consume the other keys, causing loop to end
+ }
+ fi
+
+ cat "$L_TMP_ID_FILE"
+ done
+ }
+ )
+ eval "$L_CLEANUP" && trap - EXIT TERM INT QUIT
+
+ if expr "$NEW_IDS" : "^ERROR: " >/dev/null ; then
+ printf '\n%s: %s\n\n' "$0" "$NEW_IDS" >&2
+ exit 1
+ fi
+ if [ -z "$NEW_IDS" ] ; then
+ printf '\n%s: WARNING: All keys were skipped because they already exist on the remote system.\n' "$0" >&2
+ printf '\t\t(if you think this is a mistake, you may want to use -f option)\n\n' >&2
+ exit 0
+ fi
+ 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' "$NEW_IDS" | wc -l)" >&2
+}
+
+# installkey_sh [target_path]
+# produce a one-liner to add the keys to remote authorized_keys file
+# optionally takes an alternative path for authorized_keys
+installkeys_sh() {
+ local AUTH_KEY_FILE=${1:-.ssh/authorized_keys}
+
+ # In setting INSTALLKEYS_SH:
+ # the tr puts it all on one line (to placate tcsh)
+ # (hence the excessive use of semi-colons (;) )
+ # then in the command:
+ # cd to be at $HOME, just in case;
+ # the -z `tail ...` checks for a trailing newline. The echo adds one if was missing
+ # the cat adds the keys we're getting via STDIN
+ # and if available restorecon is used to restore the SELinux context
+ INSTALLKEYS_SH=$(tr '\t\n' ' ' <<-EOF)
+ cd;
+ umask 077;
+ mkdir -p $(dirname "${AUTH_KEY_FILE}") &&
+ { [ -z \`tail -1c ${AUTH_KEY_FILE} 2>/dev/null\` ] || echo >> ${AUTH_KEY_FILE}; } &&
+ cat >> ${AUTH_KEY_FILE} ||
+ exit 1;
+ if type restorecon >/dev/null 2>&1; then
+ restorecon -F .ssh ${AUTH_KEY_FILE};
+ fi
+EOF
+
+ # to defend against quirky remote shells: use 'exec sh -c' to get POSIX;
+ printf "exec sh -c '%s'" "${INSTALLKEYS_SH}"
+}
+
+REMOTE_VERSION=$(ssh -v -o PreferredAuthentications=',' -o ControlPath=none "$@" 2>&1 |
+ sed -ne 's/.*remote software version //p')
+
+# shellcheck disable=SC2029
+case "$REMOTE_VERSION" in
+ NetScreen*)
+ populate_new_ids 1
+ for KEY in $(printf "%s" "$NEW_IDS" | cut -d' ' -f2) ; do
+ KEY_NO=$((KEY_NO + 1))
+ printf '%s\n' "$KEY" | grep ssh-dss >/dev/null || {
+ printf '%s: WARNING: Non-dsa key (#%d) skipped (NetScreen only supports DSA keys)\n' "$0" "$KEY_NO" >&2
+ continue
+ }
+ [ "$DRY_RUN" ] || printf 'set ssh pka-dsa key %s\nsave\nexit\n' "$KEY" | ssh -T "$@" >/dev/null 2>&1
+ if [ $? = 255 ] ; then
+ 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
+ else
+ ADDED=$((ADDED + 1))
+ fi
+ done
+ if [ -z "$ADDED" ] ; then
+ exit 1
+ fi
+ ;;
+ dropbear*)
+ populate_new_ids 0
+ [ "$DRY_RUN" ] || printf '%s\n' "$NEW_IDS" | \
+ ssh "$@" "$(installkeys_sh /etc/dropbear/authorized_keys)" \
+ || exit 1
+ ADDED=$(printf '%s\n' "$NEW_IDS" | wc -l)
+ ;;
+ *)
+ # Assuming that the remote host treats ~/.ssh/authorized_keys as one might expect
+ populate_new_ids 0
+ [ "$DRY_RUN" ] || printf '%s\n' "$NEW_IDS" | \
+ ssh "$@" "$(installkeys_sh)" \
+ || exit 1
+ ADDED=$(printf '%s\n' "$NEW_IDS" | wc -l)
+ ;;
+esac
+
+if [ "$DRY_RUN" ] ; then
+ cat <<-EOF
+ =-=-=-=-=-=-=-=
+ Would have added the following key(s):
+
+ $NEW_IDS
+ =-=-=-=-=-=-=-=
+ EOF
+else
+ cat <<-EOF
+
+ Number of key(s) added: $ADDED
+
+ Now try logging into the machine, with: "ssh $SSH_OPTS"
+ and check to make sure that only the key(s) you wanted were added.
+
+ EOF
+fi
+
+# =-=-=-=