402 lines
18 KiB
Bash
Executable file
402 lines
18 KiB
Bash
Executable file
#!/bin/bash
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FILELOGLEVEL=DEBUG
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. $(dirname $0)/../logging
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# loggerfactory
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LANG=C
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usage(){
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cat << EOF
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Usage: $(basename $0) [[-c]|[--create-only]]|[[-t]|[--token-only]]|[[-k]|[--key-only]]|[[-r]|[-f]|[--readd]|[--force]] [<ssh-identity>]
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If started only with <ssh-identity>, the script looks up in configured identity-path \$SSH_IDENTITIES_DIR (${SSH_IDENTITIES_DIR}) if it can find a directory named after <ssh-identity>.
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If no <ssh_identity> is given, the identity is set to \$SSH_DEFAULT_IDENTITY ($SSH_DEFAULT_IDENTITY) configured via Environment.
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IF \$SSH_DEFAULT_IDENTITY is also not set, default is the SSH_DEFAULT_IDENTITY
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The output is the name of the file, where ssh-agent infomations are hold to load it to current shell for further actions.
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Use "$ eval \$(<outputfilenam>)", if you want to load the SSH_AUTH_SOCK and SSH_AGENT_PID in current shell or shorter "$ loadagent [<ssh_identity>]"
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-c|--create-only Create or restart only the agent. Do not load any
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key or token in it.
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The Output is used for loading the agent in the current
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shell. (loadagent <identity>)
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-t|--token-only To add or renew only configured pkcs11-hardware-token
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configured in ${SSH_IDENTITIES_DIR}/<ssh-identity>,
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just use this.
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-k|--key-only To add or renew only configured keys configured in
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${SSH_IDENTITIES_DIR}/<ssh-identity>, just use this.
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-r|-f|--readd-token|--force remove all in ${SSH_IDENTITIES_DIR}/<ssh-identity>
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configured keys and tokens and readd them again.
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Depends on -t an -k Option to select wheter only
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keys or tokens only. If no -t and -k is given, all
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keys and token are removed and readded again.
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Just to be asked for password again, if you plugged off
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hardware-token and plugged it in again.
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--rm|--remove remove keys and token instead of adding them.
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-h|--info Show this info
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EOF
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}
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check_token(){
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# it's the same as "token" in functions.sh
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# defined here also, to work also in environments, where functions.sh couldn't be sourced
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[ -z "${PKCS11_MODULE:+x}" ] && { PKCS11_MODULE=$P11M; export PKCS11_MODULE; }
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# If DISPLAY is set, ssh-add calls ssh-askpass, and if its in remote-terminal, it wont work
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# So remember and unset DISPLAY, and set it at the end again, if it was set before
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[ $DISPLAY ] && local DISPLAY_ORIG=$DISPLAY
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[ $DISPLAY ] && logtrace "unset DISPLAY: $DISPLAY"
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[ $DISPLAY ] && unset DISPLAY
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# Write public keys of all in agent stored keys to a temporary file
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local tmppubkey="$(mktemp -p ${XDG_RUNTIME_DIR} pubkey.XXXXXX.pub)"
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logtrace "tmppubkey: $tmppubkey"
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loginfo "$(ssh-add -L > $tmppubkey)"
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# Check if public-keys in tmppubkey are working. They are not working, if you removed and add back hardware-token.
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loginfo "$(ssh-add -T ${tmppubkey}|| { ssh-add -e $PKCS11_MODUlE; ssh-add -s $PKCS11_MODUlE; } )"
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logdebug "$(rm "${tmppubkey}")"
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logdebug "$(ssh-add -l )"
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[ $DISPLAY_ORIG ] && logtrace "reset DISPLAY=$DISPLAY_ORIG"
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[ $DISPLAY_ORIG ] && export DISPLAY=$DISPLAY_ORIG
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}
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createonly=false
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tokenonly=false
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readd=false
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keyonly=false
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remove=false
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while :; do
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case $1 in
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-c|--create-only)
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createonly=true
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shift
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;;
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-t|--token-only)
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tokenonly=true
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shift
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;;
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-k|--key-only)
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keyonly=true
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shift
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;;
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-r|-f|--readd-token|--force)
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readd=true
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shift
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;;
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--rm|--remove)
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remove=true
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shift
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;;
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-h|--info)
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usage
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exit 0
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;;
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-*)
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echo "Unknown urgument: »$1«" >&2
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exit 1
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;;
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*)
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#ssh_identity=${1-${SSH_DEFAULT_IDENTITY}}
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ssh_identity=${1}
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break
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;;
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esac
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done
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agent_start_or_restart () {
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logtrace "agent_start_or_restart"
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# If DISPLAY is set, ssh-add calls ssh-askpass, and if its in remote-terminal, it wont work
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# So remember and unset DISPLAY, and set it at the end again, if it was set before
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[ $DISPLAY ] && local DISPLAY_ORIG=$DISPLAY
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[ $DISPLAY ] && logtrace "unset DISPLAY: $DISPLAY"
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[ $DISPLAY ] && unset DISPLAY
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local ssh_identity
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local agentfile
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local agentsocket
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local ret
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if [ -n "${1+x}" ]; then
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ssh_identity="${1}"
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identitydir=${SSH_IDENTITIES_DIR}/${ssh_identity}
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loginfo "ssh-identität: ${ssh_identity}" >&2
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if [ -d ${identitydir} ]; then
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[ -e "${identitydir}/config" ] && . "${identitydir}/config"
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agentfile="${SSH_AGENTS_DIR}/agent-${ssh_identity}-$(hostname)"
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agentsocket="${SSH_AGENT_SOCKETS_DIR}/socket-${ssh_identity}-$(hostname)"
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logtrace "agentfile for ${ssh_identity}: $agentfile"
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logtrace "agentsocket for ${ssh_identity}: $agentsocket"
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if (! $keyonly && ! $tokenonly ) && $remove ; then
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logdebug "delete keys and tokens in this ssh-agent"
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logdebug "$(ssh_runinagent $agentfile ssh-add -D 2>&1)"
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createonly=true
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else
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if [ -e $agentfile ]; then
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local msg
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# TODO make in runinagent
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msg="$(/bin/sh -c "unset SSH_AUTH_SOCK SSH_AGENT_PID; . $agentfile >/dev/null 2>&1; ssh-add -l 2>&1")"
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local ret=$?
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logtrace "Output from check for running: $msg"
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case $ret in
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0)
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logdebug "agent is running"
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;;
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1)
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logdebug "agent is running, but:"
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logwarning "$msg"
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;;
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2)
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logdebug "former agent is not running -> start it"
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logdebug "SSH_AGENT_OPTIONS: $SSH_AGENT_OPTIONS"
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[ -e $agentsocket ] && { logdebug -n "remove socketfile: $( rm -v "$agentsocket" )"; }
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logtrace "$(ssh-agent -a $agentsocket ${SSH_AGENT_OPTIONS} > $agentfile )"
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logdebug "agent started"
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;;
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esac
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else
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logdebug "agent did not exist -> create it"
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logtrace "ssh-agent -a $agentsocket \> $agentfile"
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logtrace "$(ssh-agent -a $agentsocket $SSH_AGENT_OPTIONS > $agentfile )"
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logdebug "agent started"
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fi
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fi
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#logdebug "ssh-agent for identity »$ssh_identity«: $agentfile"
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$createonly && logtrace "current loaded keys after action:
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$(ssh_runinagent $agentfile ssh-add -l)"
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ret=0
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else
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logwarning "ssh-identity »$ssh_identity« is not configured. Please create $identitydir and add keys"
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ret=2
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fi
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else
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if which gnome-keyring-daemon >/dev/null 2>&1; then
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logdebug "no identity given -> gnome-keyrings ssh-agent"
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agentfile="${SSH_AGENTS_DIR}/agent-gnome_session-$(hostname)"
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agentsocket="${SSH_AGENT_SOCKETS_DIR}/socket-gnome-session-$(hostname)"
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gnome-keyring-daemon -s > $agentfile
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logdebug "$(cat $agentfile)"
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logdebug "ssh-agent for identity »$ssh_identity«: $agentfile"
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# logdebug "currently loaded keys after action:
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#$(ssh_runinagent $agentfile ssh-add -l)"
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ret=0
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else
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logwarning "no identity given -> exit"
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ret=1
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fi
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fi
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[ $DISPLAY_ORIG ] && logtrace "reset DISPLAY=$DISPLAY_ORIG"
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[ $DISPLAY_ORIG ] && export DISPLAY=$DISPLAY_ORIG
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return $ret
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}
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agent_load_identity_keys () {
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logtrace "agent_load_identity_keys"
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# If DISPLAY is set, ssh-add calls ssh-askpass, and if its in remote-terminal, it wont work
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# So remember and unset DISPLAY, and set it at the end again, if it was set before
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[ $DISPLAY ] && local DISPLAY_ORIG=$DISPLAY
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[ $DISPLAY ] && logtrace "unset DISPLAY: $DISPLAY"
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[ $DISPLAY ] && unset DISPLAY
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local ssh_identity
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local agentfile
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local agentsocket
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local fingerprints
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declare -a fingerprints
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local pubkeysonly
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declare -a pubkeysonly
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local fingerprint
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local tokenfingerprint
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if [ -n "${1+x}" ]; then
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ssh_identity="${1}"
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identitydir=${SSH_IDENTITIES_DIR}/${ssh_identity}
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if [ -d ${identitydir} ]; then
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[ -e "${identitydir}/config" ] && . "${identitydir}/config"
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agentfile="${SSH_AGENTS_DIR}/agent-${ssh_identity}-$(hostname)"
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agentsocket="${SSH_AGENT_SOCKETS_DIR}/socket-${ssh_identity}-$(hostname)"
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logdebug "SSH_ADD_OPTIONS: $SSH_ADD_OPTIONS"
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logtrace "agentfile: $agentfile"
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logtrace "agentsocket: $agentsocket"
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logtrace "identitydir: $identitydir"
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fingerprints=( $(ssh_runinagent $agentfile "ssh-add -l|awk '{print \$2}'") )
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logdebug "fingerprints from loaded keys before action:"
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for f in ${fingerprints[@]};do
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logdebug "$f"
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done
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if ! $tokenonly ; then
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# load keys
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for key in $(ls ${SSH_IDENTITIES_DIR}/${ssh_identity}/id_*|grep -v "pub$\|so$\|config$\|public$"); do
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fingerprint=$(ssh-keygen -l -f $key|awk '{print $2}')
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if [[ ${fingerprints[*]} =~ "$fingerprint" ]]; then
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logdebug "key: $(basename $key) (with fp $fingerprint) is loaded"
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if $readd || $remove ; then
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$readd && logdebug "re-add key $key"
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$remove && logdebug "remove key $key"
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logdebug "$(ssh_runinagent $agentfile ssh-add ${SSH_ADD_OPTIONS} -d ${key} 2>&1)"
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$remove || logdebug "$(ssh_runinagent $agentfile ssh-add ${SSH_ADD_OPTIONS} ${key} 2>&1)"
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fi
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else
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logdebug "key: $key is not loaded -> load it"
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#logdebug "$(ssh_runinagent $agentfile ssh-add ${SSH_ADD_OPTIONS} -d ${key} 2>&1)"
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$remove || logdebug "$(ssh_runinagent $agentfile ssh-add ${SSH_ADD_OPTIONS} ${key} 2>&1)"
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fi
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done
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fi
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if ! $keyonly ; then
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# load tokens
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for pubkey in $(ls ${SSH_IDENTITIES_DIR}/${ssh_identity}/id_*|grep "pub$\|public$"|grep -v "cert.pub"); do
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if $( ls ${pubkey%.pub} 1>/dev/null 2>&1);then
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logdebug "pubkey with privkey: $pubkey"
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else
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logdebug "pubkey without privkey: $pubkey"
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pubkeysonly+=($pubkey)
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fi
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if [ -e "${pubkey%.pub}-cert.pub" ]; then
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#logwarning "${pubkey%.pub}-cert.pub: $(date +%s -d $(ssh-keygen -L -f "${pubkey%.pub}-cert.pub"|awk '$1 == "Valid:"{print $5}'))"
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#logwarning "now: $(date +%s -d NOW)"
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cert_exp_date=$(ssh-keygen -L -f "${pubkey%.pub}-cert.pub"|awk '$1 == "Valid:"{print $5}')
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#[ $(date +%s -d $(ssh-keygen -L -f "${pubkey%.pub}-cert.pub"|awk '$1 == "Valid:"{print $5}')) -gt $(date +%s -d NOW) ] \
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[ $(date +%s -d $cert_exp_date) -gt $(date +%s -d NOW) ] \
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|| logwarning "CERTIFICATE IS NOT VALID ANYMORE: ${pubkey%.pub}-cert.pub"
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#[ $(date +%s -d $(ssh-keygen -L -f "${pubkey%.pub}-cert.pub"|awk '$1 == "Valid:"{print $5}')) -lt $(date +%s -d "$SSH_CERT_VALIDITY_WARN_SEC") ] \
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[ $(date +%s -d $cert_exp_date) -lt $(date +%s -d "$SSH_CERT_VALIDITY_WARN_SEC") ] \
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&& logwarning "CERTIFICATE expires in $(echo "scale=0; ( `date -d $cert_exp_date +%s` - `date -d now +%s`) / (24*3600)" | bc -l) days: ${pubkey%.pub}-cert.pub"
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fi
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done
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loginfo "pubkeysonly: ${pubkeysonly[@]} (count: ${#pubkeysonly[*]})"
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for key in $(ls ${SSH_IDENTITIES_DIR}/${ssh_identity}/*|grep "\.so$"); do
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logdebug "PKCS11_MODULE: ${PKCS11_MODULE:-not set} - key: $key"
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#[ -e "${P11M-x}" ] || [ "$(readlink - f $key)" == "$P11M" ] || key="$P11M"
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#[ "$(readlink - f $key)" == "$P11M" ] || key="$P11M"
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[ "$(readlink -f $key)" != "$PKCS11_MODULE" -a "${PKCS11_MODULE:-x}" != "x" ] && key="$PKCS11_MODULE"
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export PKCS11_MODULE=$(readlink -f $key)
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export P11M=$PKCS11_MODULE
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logdebug "PKCS11_MODULE: ${PKCS11_MODULE:-not set} - key: $key"
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grep -q "PKCS11_MODULE" "${agentfile}" >/dev/null 2>&1 && sed -i -e '/PKCS11_MODULE/d' "${agentfile}"
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echo "PKCS11_MODULE=$(readlink -f $key)" | tee -a "${agentfile}" >&2
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tokenfingerprints=($(ssh-keygen -l -D $key|tr -s ' '|awk '{print $2}'))
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logtrace "fingerprints: ${fingerprints[*]}"
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logtrace "tokenfingerprints count: ${#tokenfingerprints[@]}"
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if [ ${#tokenfingerprints[@]} -gt 1 ]; then
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logerr "Found ${#tokenfingerprints[@]} in $key! Check if only one token is plugged into your computer"
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else
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tokenfingerprint=${tokenfingerprints[0]}
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logtrace "tokenfingerprint: ${tokenfingerprint}"
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if [[ "${fingerprints[@]}" =~ "$tokenfingerprint" ]]; then
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logdebug "token: $key ($tokenfingerprint) is loaded"
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check_pubkeysonly
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if $readd || $remove ; then
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$readd && logdebug "re-add token $key"
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$remove && logdebug "remove token $key"
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logtrace "agentfile1 $agentfile \$SSH_ADD_OPTIONS $key "
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logdebug "$(ssh_runinagent $agentfile ssh-add ${SSH_ADD_OPTIONS} -e "${key}" 2>&1)"
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$remove || logdebug "$(ssh_runinagent $agentfile ssh-add ${SSH_ADD_OPTIONS} -s "${key}" 2>&1)"
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fi
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else
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logdebug "token: $key is not loaded -> load it"
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logdebug "$(ssh_runinagent $agentfile ssh-add -v ${SSH_ADD_OPTIONS} -e ${key} 2>&1)"
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$remove || logdebug "$(ssh_runinagent $agentfile ssh-add ${SSH_ADD_OPTIONS} -s ${key} 2>&1)"
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fi
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fi
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done
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fi
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loginfo "currently loaded keys after action: $(ssh_runinagent $agentfile ssh-add -l|wc -l)"
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logdebug "$(ssh_runinagent $agentfile ssh-add -l)"
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else
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logwarning "ssh-identity $ssh_identity is not configured. Please create $identitydir and add keys"
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fi
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fi
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[ $DISPLAY_ORIG ] && logtrace "reset DISPLAY=$DISPLAY_ORIG"
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[ $DISPLAY_ORIG ] && export DISPLAY=$DISPLAY_ORIG
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}
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function check_pubkeysonly () {
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if [ ${#pubkeysonly[*]} -gt 0 ] ; then
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for p in ${pubkeysonly[@]}; do
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logtrace "pubkeyonly: $p"
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logtrace "$(ssh_runinagent $agentfile ssh-add -T ${p} 2>&1)"
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ssh_runinagent $agentfile ssh-add -T ${p} 2>&1 || { $remove || readd=true; break; }
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done
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else
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logwarning "obviously there is no pubkey for the token in ${SSH_IDENTITIES_DIR}/${ssh_identity}/"
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logwarning "you can add the pubkey with"
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logwarning " ssh-add -L > ${SSH_IDENTITIES_DIR}/${ssh_identity}/id_etoken.pub"
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logwarning "make sure, only the token is loaded into ssh-agent with"
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logwarning " ssh-add -l"
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logwarning "only one line should be the output"
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fi
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logdebug "readd: $readd"
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}
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ssh_runinagent () {
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local agentfile
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local command
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local agentfile=${1}
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shift
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local sshcommand=${@}
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logtrace "run command »$sshcommand« in agent $agentfile"
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if [ -e "$agentfile" ]; then
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/bin/sh -c "unset SSH_AUTH_SOCK SSH_AGENT_PID; . $agentfile >/dev/null 2>/dev/null; $sshcommand"
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ret=$?
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else
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logwarning "agentfile not existent"
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ret=99
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fi
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return $ret
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}
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SCRIPTENTRY
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[ -z "${SSH_IDENTITIES_DIR+x}" ] && { SSH_IDENTITIES_DIR="${SSH_IDENTITIES_DEFAULT_DIR-${HOME}/.ssh/identities}"; export SSH_IDENTITIES_DIR; }
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[ -z "${SSH_AGENTS_DIR+x}" ] && { SSH_AGENTS_DIR=${SSH_AGENTS_DEFAULT_DIR-~/.ssh/agents}; export SSH_AGENTS_DIR; }
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[ -z "${SSH_AGENT_SOCKETS_DIR+x}" ] && { SSH_AGENT_SOCKETS_DIR=${SSH_AGENT_SOCKETS_DEFAULT_DIR-~/.ssh/agents}; export SSH_AGENT_SOCKETS_DIR; }
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[ -z "${SSH_AGENT_OPTIONS+x}" ] && { SSH_AGENT_OPTIONS=${SSH_AGENT_DEFAULT_OPTIONS--t 7200 }; export SSH_AGENT_OPTIONS; }
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logtrace " SSH_AGENTS_DIR: $SSH_AGENTS_DIR"
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logtrace "SSH_AGENT_SOCKETS_DIR: $SSH_AGENT_SOCKETS_DIR"
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logtrace " SSH_IDENTITIES_DIR: $SSH_IDENTITIES_DIR"
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[ -z "${SSH_AGENTS_DIR-x}" ] || mkdir -vp "$SSH_AGENTS_DIR"
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[ -z "${SSH_AGENT_SOCKETS_DIR-x}" ] || mkdir -vp "$SSH_AGENT_SOCKETS_DIR"
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[ -z "${SSH_IDENTITIES_DIR-x}" ] || mkdir -vp "$SSH_IDENTITIES_DIR"
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if [[ $SSH_TTY || $X2GO_SESSION ]] ; then
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logdebug "Shell running with forwarded ssh-agent. Please add local token manually"
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check_token
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res=1
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else
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logdebug "run with local ssh-agent"
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agent_start_or_restart $ssh_identity
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! $createonly && agent_load_identity_keys $ssh_identity
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res=0
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fi
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SCRIPTEXIT
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exit $res
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