268 lines
7.4 KiB
Bash
268 lines
7.4 KiB
Bash
#!/bin/bash
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_extractpubkey () {
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name=${2:-$(basename $1)}
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ssh-keygen -y -f $1 | sed "s/$/ ${name}/"
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}
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getkeyname () {
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if [[ $(echo $1 | awk -F . '{print $NF}') == "pub" ]]; then
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basename "$1" | rev | cut -f 2- -d '.' | rev
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else
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basename $1
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fi
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}
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extractpubkey () {
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[[ $1 ]] || return 1
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[[ -f $1 ]] && _extractpubkey $1 && return 0
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# echo try pubkeys dir
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[[ $SSH_PUB_KEYS_DIR ]] && [[ -f $SSH_PUB_KEYS_DIR/$1 ]] && _extractpubkey $SSH_PUB_KEYS_DIR/$1 && return 0
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# echo try home
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[[ -f $HOME/.ssh/$1 ]] && _extractpubkey $HOME/.ssh/$1 && return 0
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return 1
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}
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# need to use full filename including any .pub
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catpubkey () {
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[[ $1 ]] || return 1
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local key; local pub
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key=$1
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if [[ $(echo $1 | awk -F . '{print $NF}') == "pub" ]]; then
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key=$(basename "$1" | rev | cut -f 2- -d '.' | rev)
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pub=$1
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else
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pub="${1}.pub"
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key=$(basename $1)
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fi
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# echo try agent $key
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key=$(ssh-add -L | sed -n /$key/p)
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[[ $key ]] && echo $key && return 0
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# echo try $pub
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[[ -f $pub ]] && cat $pub && return 0
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# echo try $SSH_PUB_KEYS_DIR/$pub
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[[ $SSH_PUB_KEYS_DIR ]] && [[ -f $SSH_PUB_KEYS_DIR/$pub ]] && cat $SSH_PUB_KEYS_DIR/$pub && return 0
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# echo $HOME/.ssh/$pub
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[[ -f $HOME/.ssh/$pub ]] && cat $HOME/.ssh/$pub && return 0
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# echo try extract key from private key
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extractpubkey $key
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}
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#example:
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# initial xfer of pubkey with a password
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# sshpubkey <pubkey opts> host <ssh run options> -- <more ssh options>
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# TODO way to get public key
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# try agent first with sed ssh-add -L | sed -n /sysadmin.kebler.net/p
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# then in current directory, in SSH_PUB_DIR directory, in .ssh directory (or within)
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# try pub file, then extract from private key
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export SSH_PUB_KEYS
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module_load path
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module_load net-utils
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module_load remote
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sshpubkey () {
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# echo default pub key dir: $SSH_PUB_KEYS
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local kname=id_rsa
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local user
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local opts;local dr="true";local rm;
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local vkey; local kuser; local host; local upass; local remove
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local _sudo; local list;
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help() {
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cat <<EOF
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usage: sshpubkey <pubkey opts> host <ssh script options>
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-a, <alternate user> put the key at another user on remote. if you want to put it to root use 'root' will require remote sudo
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-u, <user> remote user if not available in host
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-k, <key> can be either the path to a public key file or the name of the key currently loaded in an ssh agent
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-l, list the keys for the remote user
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-r, remove the key from the user, use the comment identifier of the public key
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-o, <options> additional ssh options
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-e, required to actually make the remote changes, otherwise it's a dry run. This to avoid making a mistake and locking out of remote
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-h, this help text
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EOF
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}
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local OPTION;local OPTARG;local OPTIND
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while getopts 'sp:hu:a:r:ek:o:s:l' OPTION; do
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# echo OPTION $OPTION ARG $OPTARG
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case "$OPTION" in
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a)
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# to put the key at another user on remote. will require sudo on remote
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kuser="-u $OPTARG"
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;;
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u)
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# user if not explicit from host
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user=$OPTARG
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;;
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p)
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upass="-p $OPTARG"
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;;
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l)
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list=true
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;;
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r)
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# remove key, must be "comment identifier in public key"
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rm=$OPTARG
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;;
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k)
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kpath=$OPTARG
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key=$(getkeyname $kpath)
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;;
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o)
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opts=$OPTARG
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;;
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e)
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dr=""
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;;
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h)
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help
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;;
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*)
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echo unknown option -$OPTARG
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help
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# opts="$opts ${@:$OPTIND:1}"
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# # ((OPTIND+=1))
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# #echo remaining ${@:$OPTIND}
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return 1
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;;
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esac
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done
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shift $((OPTIND - 1))
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host=$1
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shift 1
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if [[ ! $host ]]; then
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>&2 echo "no host supplied, aborting"
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help
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return 2
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fi
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sshsopts=("${@}")
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user=${user:-$(get_user_host $host)}
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[[ ! $user ]] && >&2 echo "unable to determine remote user, aborting" && return 2
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run () (
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local func; local _sudo
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func=$1; shift
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if [[ "${kuser}" =~ "root" ]]; then
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kuser=""
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_sudo=-s
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fi
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# echo run opts: $@
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[[ $upass || "${sshsopts[*]}" ]] && opts="-- "
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echo remote_script $_sudo $kuser -x $func $host "$@" $opts $upass "${sshsopts[@]}"
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remote_script $_sudo $kuser -x $func $host "$@" $opts $upass "${sshsopts[@]}"
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)
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if [[ $list ]]; then
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run list_keys
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return $?
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fi
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if [[ $rm ]]; then
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############# REMOVE PUBLIC KEY #################
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# todo allow removeall without access to public key
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echo ">>>>> removing public key: \"$rm\" from ${kuser:-$user}"
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[[ ! $dr ]] && remove="_remove_"
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run rm_key "$remove" "$rm"
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return $?
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fi
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vkey=$(catpubkey $kpath) # get actaul content of public key
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[[ $? -gt 0 ]] && echo no valid public key for $key at $kpath found && return 4
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# ## Alternate remote user?
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# if [[ $kuser ]]; then
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# [[ ! $supass ]] && { echo remote user, $user, password must be supplied for sudo. use -s;return 7; }
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# fi
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if [[ $key ]] ; then
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############## ADD PUBLIC KEY ########################
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echo ">>>>>> sending key $key to remote user ${kuser:-$user}"
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run cpy_key $vkey
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return $?
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fi
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}
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function cpy_key () {
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vkey=$*
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if [[ $(cat $HOME/.ssh/authorized_keys | grep "$vkey") ]]; then
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echo key $key already in authorized_keys for remote user $USER
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else
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echo -e "\nInstalling key for $USER"
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echo -e "\n############ appending key to -s$HOME/.ssh/authorized_keys ############"
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cat $HOME/.ssh/authorized_keys
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echo "###########################"
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# echo "#################### adding ####################"
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# echo $vkey
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# echo "#################################################"
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if [[ ! -f $HOME/.ssh/authorized_keys ]]; then
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mkdir $HOME/.ssh >/dev/null 2>&1
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touch $HOME/.ssh/authorized_keys >/dev/null 2>&1
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chmod 600 $HOME/.ssh/authorized_keys >/dev/null 2>&1
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ls -la $HOME/.ssh/authorized_keys
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fi
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echo "$vkey" >> $HOME/.ssh/authorized_keys
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ls -la $HOME/.ssh/authorized_keys
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echo "******** updated authorized_keys for $USER *******************"
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cat $HOME/.ssh/authorized_keys
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echo "******************************************************"
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fi
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}
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function rm_key () {
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local kname; local remove; local found
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echo "$@"
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[[ $1 = "_remove_" ]] && remove="-i" && shift 1
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kname="$*"
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if [[ ! -f $HOME/.ssh/authorized_keys ]]; then
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echo no $HOME/authorized_keys file nothing to remove
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else
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# found=$(sed "\,$kname$,p" $HOME/.ssh/authorized_keys)
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found=$(cat $HOME/.ssh/authorized_keys | grep "${kname}$")
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if [[ $found ]]; then
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echo key found in authorized_keys, removing...
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echo "$found"
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if [[ $remove ]]; then
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echo "********updated authorized_keys file for $USER *******************"
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sed $remove "\,$kname$,d" $HOME/.ssh/authorized_keys
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cat $HOME/.ssh/authorized_keys
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echo "******************************************************"
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else
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echo "--- this is a dry run by default ---"
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echo "--- if you are SURE this is the key you want removed"
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echo "--- run again with -e to actaully remove this key ---"
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echo "!!! REMOVING THE WRONG KEY MAY RESULT IN LOOSING ACCESS TO THE MACHINE !!!"
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fi
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else
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echo no key $kname found in the authorized_keys, nothing to remove
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fi
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fi
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}
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function list_keys () {
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echo "********authorized_keys file for user: $USER at host: $HOSTNAME *******************"
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cat $HOME/.ssh/authorized_keys
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echo "******************************************************"
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}
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