########################################################################
PGRM=$(basename $0)
-SHARE=${SHARE:-"/usr/share/monkeysphere"}
+SHARE=${MONKEYSPHERE_SHARE:="/usr/share/monkeysphere"}
export SHARE
. "${SHARE}/common" || exit 1
DATE=$(date -u '+%FT%T')
# unset some environment variables that could screw things up
-GREP_OPTIONS=
+unset GREP_OPTIONS
# default return code
-ERR=0
+RETURN=0
########################################################################
# FUNCTIONS
usage() {
cat <<EOF
-usage: $PGRM <subcommand> [args]
+usage: $PGRM <subcommand> [options] [args]
MonkeySphere server admin tool.
subcommands:
update-users (u) [USER]... update users authorized_keys files
+
gen-key (g) [HOSTNAME] generate gpg key for the server
+ -l|--length BITS key length in bits (2048)
+ -e|--expire EXPIRE date to expire
+ -r|--revoker FINGERPRINT add a revoker
show-fingerprint (f) show server's host key fingerprint
publish-key (p) publish server's host key to keyserver
- trust-key (t) KEYID import and tsign a certification key
+
+ add-identity-certifier (a) KEYID import and tsign a certification key
+ -n|--domain DOMAIN domain of certifier ()
+ -t|--trust TRUST trust level of certifier ('full')
+ -d|--depth DEPTH trust depth for certifier (1)
+ remove-identity-certifier (r) KEYID remove a certification key
+ list-identity-certifiers (l) list certification keys
+
help (h,?) this help
EOF
}
# function to interact with the authentication gnupg keyring
+# FIXME: this function requires basically accepts only a single
+# argument because of problems with quote expansion. this needs to be
+# fixed/improved.
gpg_authentication() {
GNUPGHOME="$GNUPGHOME_AUTHENTICATION"
export GNUPGHOME
for uname in $unames ; do
# check all specified users exist
if ! getent passwd "$uname" >/dev/null ; then
- error "----- unknown user '$uname' -----"
+ log "----- unknown user '$uname' -----"
continue
fi
log "----- user: $uname -----"
+ if ! check_key_file_permissions "$uname" "$AUTHORIZED_USER_IDS" ; then
+ log "Improper permissions on authorized_user_ids file."
+ continue
+ fi
+
+ if ! check_key_file_permissions "$uname" "$RAW_AUTHORIZED_KEYS" ; then
+ log "Improper permissions on authorized_keys file."
+ continue
+ fi
+
# make temporary directory
TMPDIR=$(mktemp -d)
# user
su_monkeysphere_user \
". ${SHARE}/common; process_authorized_user_ids $TMP_AUTHORIZED_USER_IDS"
- ERR="$?"
+ RETURN="$?"
fi
# add user-controlled authorized_keys file path if specified
local fingerprint
hostName=${1:-$(hostname --fqdn)}
+ userID="ssh://${hostName}"
- SERVICE=${SERVICE:-"ssh"}
- userID="${SERVICE}://${hostName}"
-
+ # check for presense of key with user ID
if gpg_host --list-key ="$userID" > /dev/null 2>&1 ; then
failure "Key for '$userID' already exists"
fi
- # set key defaults
- KEY_TYPE=${KEY_TYPE:-"RSA"}
- KEY_LENGTH=${KEY_LENGTH:-"2048"}
- KEY_USAGE=${KEY_USAGE:-"auth"}
- KEY_EXPIRE=${KEY_EXPIRE:-"0"}
- cat <<EOF
+ # set key variables
+ KEY_TYPE="RSA"
+ KEY_LENGTH=${KEY_LENGTH:="2048"}
+ KEY_USAGE="auth"
+ # prompt about key expiration if not specified
+ if [ -z "$KEY_EXPIRE" ] ; then
+ cat <<EOF
Please specify how long the key should be valid.
0 = key does not expire
<n> = key expires in n days
<n>m = key expires in n months
<n>y = key expires in n years
EOF
- read -p "Key is valid for? ($KEY_EXPIRE) " KEY_EXPIRE; KEY_EXPIRE=${KEY_EXPIRE:-"0"}
+ while [ -z "$KEY_EXPIRE" ] ; do
+ read -p "Key is valid for? (0) " KEY_EXPIRE
+ if ! test_gpg_expire ${KEY_EXPIRE:=0} ; then
+ echo "invalid value"
+ unset KEY_EXPIRE
+ fi
+ done
+ elif ! test_gpg_expire "$KEY_EXPIRE" ; then
+ failure "invalid key expiration value '$KEY_EXPIRE'."
+ fi
# set key parameters
keyParameters=$(cat <<EOF
)
# add the revoker field if specified
- # FIXME: the "1:" below assumes that $REVOKER's key is an RSA key. why?
- # FIXME: why is this marked "sensitive"? how will this signature ever
- # be transmitted to the expected revoker?
+ # FIXME: the "1:" below assumes that $REVOKER's key is an RSA key.
+ # FIXME: key is marked "sensitive"? is this appropriate?
if [ "$REVOKER" ] ; then
keyParameters="${keyParameters}"$(cat <<EOF
-
Revoker: 1:$REVOKER sensitive
EOF
)
echo "The following key parameters will be used for the host private key:"
echo "$keyParameters"
- read -p "Generate key? [Y|n]: " OK; OK=${OK:=Y}
+ read -p "Generate key? (Y/n) " OK; OK=${OK:=Y}
if [ ${OK/y/Y} != 'Y' ] ; then
failure "aborting."
fi
# publish server key to keyserver
publish_server_key() {
- read -p "really publish key to $KEYSERVER? [y|N]: " OK; OK=${OK:=N}
+ read -p "really publish key to $KEYSERVER? (y/N) " OK; OK=${OK:=N}
if [ ${OK/y/Y} != 'Y' ] ; then
failure "aborting."
fi
failure "NOT PUBLISHED (to avoid permanent publication errors during monkeysphere development)."
}
-# retrieve key from web of trust, and set owner trust to "full"
-# if key is found.
-trust_key() {
+# retrieve key from web of trust, import it into the host keyring, and
+# ltsign the key in the host keyring so that it may certify other keys
+add_certifier() {
local keyID
- local trustLevel
+ local fingerprint
+ local ltsignCommand
keyID="$1"
-
- # default values for trust depth and domain
- DEPTH=${DEPTH:-1}
- DOMAIN=${DOMAIN:-}
-
- if [ -z "$keyID" ] ; then
- failure "You must specify key to trust."
- fi
-
export keyID
# export host ownertrust to authentication keyring
gpg_host --export-ownertrust | gpg_authentication "--import-ownertrust"
# get the key from the key server
- gpg_authentication "--keyserver $KEYSERVER --recv-key $keyID"
+ gpg_authentication "--keyserver $KEYSERVER --recv-key '$keyID'" || failure
# get the full fingerprint of a key ID
fingerprint=$(gpg_authentication "--list-key --with-colons --with-fingerprint $keyID" | \
grep '^fpr:' | grep "$keyID" | cut -d: -f10)
- if [ -z "$fingerprint" ] ; then
- failure "Could not find key '$keyID'."
- fi
-
echo "key found:"
gpg_authentication "--fingerprint $fingerprint"
+ read -p "Are you sure you want to add this key as a certifier of users on this system? (y/N) " OK; OK=${OK:-N}
+ if [ "${OK/y/Y}" != 'Y' ] ; then
+ failure "aborting."
+ fi
+
# export the key to the host keyring
gpg_authentication "--export $keyID" | gpg_host --import
+ # default values for trust depth and domain
+ DOMAIN=${DOMAIN:-}
+ TRUST=${TRUST:-2}
+ DEPTH=${DEPTH:-1}
+
# ltsign command
# NOTE: *all* user IDs will be ltsigned
ltsignCommand=$(cat <<EOF
ltsign
y
-2
+$TRUST
$DEPTH
$DOMAIN
y
gpg_authentication "--check-trustdb"
}
+# delete a certifiers key from the host keyring
+remove_certifier() {
+ local keyID
+ local fingerprint
+
+ keyID="$1"
+
+ # delete the requested key (with prompting)
+ gpg_host --delete-key "$keyID"
+
+ # update the trustdb for the authentication keyring
+ gpg_authentication "--check-trustdb"
+}
+
+# list the host certifiers
+list_certifiers() {
+ gpg_host --list-keys
+}
+
########################################################################
# MAIN
########################################################################
-COMMAND="$1"
-[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
-shift
+# unset variables that should be defined only in config file
+unset KEYSERVER
+unset AUTHORIZED_USER_IDS
+unset RAW_AUTHORIZED_KEYS
+unset MONKEYSPHERE_USER
# load configuration file
-MS_CONF=${MS_CONF:-"${ETC}/monkeysphere-server.conf"}
-[ -e "$MS_CONF" ] && . "$MS_CONF"
+[ -e ${MONKEYSPHERE_SERVER_CONFIG:="${ETC}/monkeysphere-server.conf"} ] && . "$MONKEYSPHERE_SERVER_CONFIG"
-# set empty config variable with defaults
-MONKEYSPHERE_USER=${MONKEYSPHERE_USER:-"monkeysphere"}
-KEYSERVER=${KEYSERVER:-"subkeys.pgp.net"}
-CHECK_KEYSERVER=${CHECK_KEYSERVER:="true"}
-AUTHORIZED_USER_IDS=${AUTHORIZED_USER_IDS:-"%h/.config/monkeysphere/authorized_user_ids"}
-RAW_AUTHORIZED_KEYS=${RAW_AUTHORIZED_KEYS:-"%h/.ssh/authorized_keys"}
+# set empty config variable with ones from the environment, or with
+# defaults
+KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="subkeys.pgp.net"}}
+AUTHORIZED_USER_IDS=${MONKEYSPHERE_AUTHORIZED_USER_IDS:=${AUTHORIZED_USER_IDS:="%h/.config/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
-REQUIRED_USER_KEY_CAPABILITY=${REQUIRED_USER_KEY_CAPABILITY:-"a"}
-GNUPGHOME_HOST=${GNUPGHOME_HOST:-"${VARLIB}/gnupg-host"}
-GNUPGHOME_AUTHENTICATION=${GNUPGHOME_AUTHENTICATION:-"${VARLIB}/gnupg-authentication"}
+CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:="true"}
+REQUIRED_USER_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"}
+GNUPGHOME_HOST=${MONKEYSPHERE_GNUPGHOME_HOST:="${VARLIB}/gnupg-host"}
+GNUPGHOME_AUTHENTICATION=${MONKEYSPHERE_GNUPGHOME_AUTHENTICATION:="${VARLIB}/gnupg-authentication"}
-# export variables
+# export variables needed in su invocation
export DATE
export MODE
export MONKEYSPHERE_USER
export GNUPGHOME_AUTHENTICATION
export GNUPGHOME
+# get subcommand
+COMMAND="$1"
+[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
+shift
+
+# unset option variables
+unset KEY_LENGTH
+unset KEY_EXPIRE
+unset REVOKER
+unset DOMAIN
+unset TRUST
+unset DEPTH
+
+# get options for key generation and add-certifier functions
+TEMP=$(getopt -o l:e:r:n:t:d: -l length:,expire:,revoker:,domain:,trust:,depth: -n "$PGRM" -- "$@")
+
+if [ $? != 0 ] ; then
+ usage
+ exit 1
+fi
+
+# Note the quotes around `$TEMP': they are essential!
+eval set -- "$TEMP"
+
+while true ; do
+ case "$1" in
+ -l|--length)
+ KEY_LENGTH="$2"
+ shift 2
+ ;;
+ -e|--expire)
+ KEY_EXPIRE="$2"
+ shift 2
+ ;;
+ -r|--revoker)
+ REVOKER="$2"
+ shift 2
+ ;;
+ -n|--domain)
+ DOMAIN="$2"
+ shift 2
+ ;;
+ -t|--trust)
+ TRUST="$2"
+ shift 2
+ ;;
+ -d|--depth)
+ DEPTH="$2"
+ shift 2
+ ;;
+ --)
+ shift
+ ;;
+ *)
+ break
+ ;;
+ esac
+done
+
case $COMMAND in
'update-users'|'update-user'|'u')
update_users "$@"
publish_server_key
;;
- 'trust-key'|'t')
- trust_key "$@"
+ 'add-identity-certifier'|'add-certifier'|'a')
+ if [ -z "$1" ] ; then
+ failure "You must specify a key ID."
+ fi
+ add_certifier "$1"
+ ;;
+
+ 'remove-identity-certifier'|'remove-certifier'|'r')
+ if [ -z "$1" ] ; then
+ failure "You must specify a key ID."
+ fi
+ remove_certifier "$1"
+ ;;
+
+ 'list-identity-certifiers'|'list-certifiers'|'list-certifier'|'l')
+ list_certifiers "$@"
;;
'help'|'h'|'?')
;;
esac
-exit "$ERR"
+exit "$RETURN"
projects / monkeysphere.git / blobdiff