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1" class="hl"># or later.

########################################################################

PGRM=$(basename $0)

SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"}

export SYSSHAREDIR

. "${SYSSHAREDIR}/common" || exit 1

SYSDATADIR=${MONKEYSPHERE_SYSDATADIR:-"/var/lib/monkeysphere/host"}

export SYSDATADIR

# UTC date in ISO 8601 format if needed

DATE=$(date -u '+%FT%T')

# unset some environment variables that could screw things up

unset GREP_OPTIONS

# default return code

RETURN=0

########################################################################

# FUNCTIONS

########################################################################

usage() {

cat <<EOF >&2

usage: $PGRM <subcommand> [options] [args]

Monkeysphere host admin tool.

subcommands:

show-key (s) output all host key information

extend-key (e) EXPIRE extend host key expiration

add-hostname (n+) NAME[:PORT] add hostname user ID to host key

revoke-hostname (n-) NAME[:PORT] revoke hostname user ID

add-revoker (o) FINGERPRINT add a revoker to the host key

revoke-key (r) revoke host key

publish-key (p) publish server host key to keyserver

expert

import-key (i) [NAME[:PORT]] import existing ssh key to gpg

--keyfile (-f) FILE key file to import

--expire (-e) EXPIRE date to expire

gen-key (g) [NAME[:PORT]] generate gpg key for the host

--length (-l) BITS key length in bits (2048)

--expire (-e) EXPIRE date to expire

diagnostics (d) monkeysphere host status

version (v) show version number

help (h,?) this help

EOF

}

# function to run command as monkeysphere user

su_monkeysphere_user() {

# if the current user is the monkeysphere user, then just eval

# command

if [ $(id -un) = "$MONKEYSPHERE_USER" ] ; then

eval "$@"

# otherwise su command as monkeysphere user

else

su "$MONKEYSPHERE_USER" -c "$@"

}

# function to interact with the host gnupg keyring

gpg_host() {

local returnCode

GNUPGHOME="$GNUPGHOME_HOST"

export GNUPGHOME

# NOTE: we supress this warning because we need the monkeysphere

# user to be able to read the host pubring. we realize this might

# be problematic, but it's the simplest solution, without too much

# loss of security.

gpg --no-permission-warning "$@"

returnCode="$?"

# always reset the permissions on the host pubring so that the

# monkeysphere user can read the trust signatures

chgrp "$MONKEYSPHERE_USER" "${GNUPGHOME_HOST}/pubring.gpg"

chmod g+r "${GNUPGHOME_HOST}/pubring.gpg"

return "$returnCode"

}

# output just key fingerprint

fingerprint_server_key() {

# set the pipefail option so functions fails if can't read sec key

set -o pipefail

gpg_host --list-secret-keys --fingerprint \

--with-colons --fixed-list-mode 2> /dev/null | \

grep '^fpr:' | head -1 | cut -d: -f10 2>/dev/null

}

# function to check for host secret key

check_host_keyring() {

fingerprint_server_key >/dev/null \

|| failure "You don't appear to have a Monkeysphere host key on this server. Please run 'monkeysphere-server gen-key' first."

}

# show info about the host key

show_key() {

local fingerprintPGP

local fingerprintSSH

local ret=0

# FIXME: you shouldn't have to be root to see the host key fingerprint

if is_root ; then

check_host_keyring

fingerprintPGP=$(fingerprint_server_key)

gpg_authentication "--fingerprint --list-key --list-options show-unusable-uids $fingerprintPGP" 2>/dev/null

echo "OpenPGP fingerprint: $fingerprintPGP"

else

log info "You must be root to see host OpenPGP fingerprint."

ret='1'

if [ -f "${SYSDATADIR}/ssh_host_rsa_key.pub" ] ; then

fingerprintSSH=$(ssh-keygen -l -f "${SYSDATADIR}/ssh_host_rsa_key.pub" | \

awk '{ print $1, $2, $4 }')

echo "ssh fingerprint: $fingerprintSSH"

else

log info "SSH host key not found."

ret='1'

return $ret

}

########################################################################

# MAIN

########################################################################

# unset variables that should be defined only in config file

unset KEYSERVER

unset AUTHORIZED_USER_IDS

unset RAW_AUTHORIZED_KEYS

unset MONKEYSPHERE_USER

# load configuration file

[ -e ${MONKEYSPHERE_SERVER_CONFIG:="${SYSCONFIGDIR}/monkeysphere-server.conf"} ] && . "$MONKEYSPHERE_SERVER_CONFIG"

# set empty config variable with ones from the environment, or with

# defaults

LOG_LEVEL=${MONKEYSPHERE_LOG_LEVEL:=${LOG_LEVEL:="INFO"}}

KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="pool.sks-keyservers.net"}}

AUTHORIZED_USER_IDS=${MONKEYSPHERE_AUTHORIZED_USER_IDS:=${AUTHORIZED_USER_IDS:="%h/.monkeysphere/authorized_user_ids"}}

RAW_AUTHORIZED_KEYS=${MONKEYSPHERE_RAW_AUTHORIZED_KEYS:=${RAW_AUTHORIZED_KEYS:="%h/.ssh/authorized_keys"}}

MONKEYSPHERE_USER=${MONKEYSPHERE_MONKEYSPHERE_USER:=${MONKEYSPHERE_USER:="monkeysphere"}}

# other variables

CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:="true"}

REQUIRED_USER_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"}

GNUPGHOME_HOST=${MONKEYSPHERE_GNUPGHOME_HOST:="${SYSDATADIR}/gnupg-host"}

GNUPGHOME_AUTHENTICATION=${MONKEYSPHERE_GNUPGHOME_AUTHENTICATION:="${SYSDATADIR}/gnupg-authentication"}

# export variables needed in su invocation

export DATE

export MODE

export MONKEYSPHERE_USER

export LOG_LEVEL

export KEYSERVER

export CHECK_KEYSERVER

export REQUIRED_USER_KEY_CAPABILITY

export GNUPGHOME_HOST

export GNUPGHOME_AUTHENTICATION

export GNUPGHOME

# get subcommand

COMMAND="$1"

[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."

shift

case $COMMAND in

'show-key'|'show'|'s')

show_server_key

;;

'extend-key'|'e')

check_host_keyring

extend_key "$@"

;;