process_known_hosts() {
local returnCode
+ log "processing known_hosts file..."
+
# default return code is 0, which assumes a key was found for
# every host. code will be set to 1 if a key is not found for at
# least one host
local userid
local returnCode
+ log "processing authorized_user_ids file..."
+
# default return code is 0, and is set to 1 if a key for a user ID
# is not found
returnCode=0
return "$returnCode"
}
-
-##################################################
-### GPG HELPER FUNCTIONS
-
-# retrieve key from web of trust, and set owner trust to "full"
-# if key is found.
-trust_key() {
- local keyID
- local trustLevel
-
- keyID="$1"
- trustLevel="$2"
-
- if [ -z "$keyID" ] ; then
- failure "You must specify key to trust."
- fi
-
- # get the key from the key server
- if ! gpg --keyserver "$KEYSERVER" --recv-key "$keyID" ; then
- failure "Could not retrieve key '$keyID'."
- fi
-
- # get key fingerprint
- fingerprint=$(get_key_fingerprint "$keyID")
-
- echo "key found:"
- gpg --fingerprint "$fingerprint"
-
- while [ -z "$trustLevel" ] ; do
- cat <<EOF
-Please decide how far you trust this user to correctly verify other users' keys
-(by looking at passports, checking fingerprints from different sources, etc.)
-
- 1 = I don't know or won't say
- 2 = I do NOT trust
- 3 = I trust marginally
- 4 = I trust fully
- 5 = I trust ultimately
-
-EOF
- read -p "Your decision? " trustLevel
- if echo "$trustLevel" | grep -v "[1-5]" ; then
- echo "Unknown trust level '$trustLevel'."
- unset trustLevel
- elif [ "$trustLevel" = 'q' ] ; then
- failure "Aborting."
- fi
- done
-
- # attach a "non-exportable" signature to the key
- # this is required for the key to have any validity at all
- # the 'y's on stdin indicates "yes, i really want to sign"
- echo -e 'y\ny' | gpg --quiet --lsign-key --command-fd 0 "$fingerprint"
-
- # index trustLevel by one to difference between level in ui and level
- # internally
- trustLevel=$((trustLevel+1))
-
- # import new owner trust level for key
- echo "${fingerprint}:${trustLevel}:" | gpg --import-ownertrust
- if [ $? = 0 ] ; then
- log "Owner trust updated."
- else
- failure "There was a problem changing owner trust."
- fi
-}
-
-# publish server key to keyserver
-publish_server_key() {
- read -p "really publish key to $KEYSERVER? [y|N]: " OK; OK=${OK:=N}
- if [ ${OK/y/Y} != 'Y' ] ; then
- failure "aborting."
- fi
-
- # publish host key
- # FIXME: need to figure out better way to identify host key
- # dummy command so as not to publish fakes keys during testing
- # eventually:
- #gpg --keyserver "$KEYSERVER" --send-keys $(hostname -f)
- failure "NOT PUBLISHED (to avoid permanent publication errors during monkeysphere development).
-To publish manually, do: gpg --keyserver $KEYSERVER --send-keys $(hostname -f)"
-}
########################################################################
PGRM=$(basename $0)
+PGRM_PATH=$(dirname $0)
SHARE=${SHARE:-"/usr/share/monkeysphere"}
export SHARE
# generate server gpg key
gen_key() {
local hostName
+ local userID
+ local keyParameters
+ local fingerprint
hostName=${1:-$(hostname --fqdn)}
SERVICE=${SERVICE:-"ssh"}
userID="${SERVICE}://${hostName}"
+ GNUPGHOME="$GNUPGHOME_HOST"
if gpg --list-key ="$userID" > /dev/null 2>&1 ; then
failure "Key for '$userID' already exists"
fi
EOF
)
- log "generating server key... "
+ log "generating server key..."
+ GNUPGHOME="$GNUPGHOME_HOST"
echo "$keyParameters" | gpg --batch --gen-key
# output the server fingerprint
fingerprint_server_key "=${userID}"
# find the key fingerprint of the server primary key
- keyID=$(gpg --list-key --with-colons --with-fingerprint "=${userID}" | \
+ GNUPGHOME="$GNUPGHOME_HOST"
+ fingerprint=$(gpg --list-key --with-colons --with-fingerprint "=${userID}" | \
grep '^fpr:' | head -1 | cut -d: -f10)
+ # export the host key to the authentication keyring
+ GNUPGHOME="$GNUPGHOME_HOST" gpg --export "$fingerprint" | \
+ su --preserve-environment "$MONKEYSPHERE_USER" -c -- \
+ "GNUPGHOME=$GNUPGHOME_AUTHENTICATION gpg --import"
+
+ # set host key owner trust to ultimate in authentication keyring
+ echo "${fingerprint}:6:" | \
+ su --preserve-environment "$MONKEYSPHERE_USER" -c -- \
+ "GNUPGHOME=$GNUPGHOME_AUTHENTICATION gpg --import-ownertrust"
+
# write the key to the file
# NOTE: assumes that the primary key is the proper key to use
- (umask 077 && gpgsecret2ssh "$keyID" > "${VARLIB}/ssh_host_rsa_key")
+ GNUPGHOME="$GNUPGHOME_HOST"
+ (umask 077 && gpgsecret2ssh "$fingerprint" > "${VARLIB}/ssh_host_rsa_key")
log "Private SSH host key output to file: ${VARLIB}/ssh_host_rsa_key"
}
fingerprint_server_key() {
local ID
- if [ -z "$1" ] ; then
+ if [ "$1" ] ; then
ID="$1"
else
ID="=ssh://$(hostname --fqdn)"
gpg --fingerprint --list-secret-keys "$ID"
}
+# publish server key to keyserver
+publish_server_key() {
+ read -p "really publish key to $KEYSERVER? [y|N]: " OK; OK=${OK:=N}
+ if [ ${OK/y/Y} != 'Y' ] ; then
+ failure "aborting."
+ fi
+
+ # publish host key
+ # FIXME: need to figure out better way to identify host key
+ # dummy command so as not to publish fakes keys during testing
+ # eventually:
+ #gpg --keyserver "$KEYSERVER" --send-keys $(hostname -f)
+ failure "NOT PUBLISHED (to avoid permanent publication errors during monkeysphere development).
+To publish manually, do: gpg --keyserver $KEYSERVER --send-keys $(hostname -f)"
+}
+
+
+# retrieve key from web of trust, and set owner trust to "full"
+# if key is found.
+trust_key() {
+ local keyID
+ local trustLevel
+
+ keyID="$1"
+ trustLevel="$2"
+
+ if [ -z "$keyID" ] ; then
+ failure "You must specify key to trust."
+ fi
+
+ export keyID
+
+ # get the key from the key server
+ GNUPGHOME="$GNUPGHOME_AUTHENTICATION"
+ su --preserve-environment "$MONKEYSPHERE_USER" -c -- \
+ "gpg --keyserver $KEYSERVER --recv-key $keyID"
+ if [ "$?" != 0 ] ; then
+ failure "Could not retrieve key '$keyID'."
+ fi
+
+ # move the key from the authentication keyring to the host keyring
+ GNUPGHOME="$GNUPGHOME_AUTHENTICATION"
+ su --preserve-environment "$MONKEYSPHERE_USER" -c -- \
+ "gpg --export $keyID" | \
+ GNUPGHOME="$GNUPGHOME_HOST" gpg --import
+
+ # get key fingerprint
+ GNUPGHOME="$GNUPGHOME_HOST"
+ fingerprint=$(get_key_fingerprint "$keyID")
+
+ echo "key found:"
+ GNUPGHOME="$GNUPGHOME_HOST"
+ gpg --fingerprint "$fingerprint"
+
+ while [ -z "$trustLevel" ] ; do
+ cat <<EOF
+Please decide how far you trust this user to correctly verify other users' keys
+(by looking at passports, checking fingerprints from different sources, etc.)
+
+ 1 = I don't know or won't say
+ 2 = I do NOT trust
+ 3 = I trust marginally
+ 4 = I trust fully
+ 5 = I trust ultimately
+
+EOF
+ read -p "Your decision? " trustLevel
+ if echo "$trustLevel" | grep -v "[1-5]" ; then
+ echo "Unknown trust level '$trustLevel'."
+ unset trustLevel
+ elif [ "$trustLevel" = 'q' ] ; then
+ failure "Aborting."
+ fi
+ done
+
+ # attach a "non-exportable" signature to the key
+ # this is required for the key to have any validity at all
+ # the 'y's on stdin indicates "yes, i really want to sign"
+ GNUPGHOME="$GNUPGHOME_HOST"
+ echo -e 'y\ny' | \
+ gpg --quiet --lsign-key --command-fd 0 "$fingerprint"
+
+ # copy the host keyring into the authentication keyring
+ mv "$GNUPGHOME_AUTHENTICATION"/pubring.gpg{,.old}
+ cp "$GNUPGHOME_HOST"/pubring.gpg "$GNUPGHOME_AUTHENTICATION"/pubring.gpg
+ chown "$MONKEYSPHERE_USER" "$GNUPGHOME_AUTHENTICATION"/pubring.gpg
+ GNUPGHOME="$GNUPGHOME_AUTHENTICATION"
+ su --preserve-environment "$MONKEYSPHERE_USER" -c -- \
+ "gpg --import ${GNUPGHOME_AUTHENTICATION}/pubring.gpg.old"
+
+ # index trustLevel by one to difference between level in ui and level
+ # internally
+ trustLevel=$((trustLevel+1))
+
+ # import new owner trust level for key
+ GNUPGHOME="$GNUPGHOME_AUTHENTICATION"
+ echo "${fingerprint}:${trustLevel}:" | \
+ su --preserve-environment "$MONKEYSPHERE_USER" -c -- \
+ "GNUPGHOME=$GNUPGHOME_AUTHENTICATION gpg --import-ownertrust"
+
+ if [ $? = 0 ] ; then
+ log "Owner trust updated."
+ else
+ failure "There was a problem changing owner trust."
+ fi
+}
+
########################################################################
# MAIN
########################################################################
GNUPGHOME_HOST=${GNUPGHOME_HOST:-"${VARLIB}/gnupg-host"}
GNUPGHOME_AUTHENTICATION=${GNUPGHOME_AUTHENTICATION:-"${VARLIB}/gnupg-authentication"}
-# set default GNUPGHOME, and make sure the directory exists. this is
-# true for all functions expect user authentication
-# (ie. update-users).
-GNUPGHOME="$GNUPGHOME_HOST"
+# export variables
+export MODE
+export MONKEYSPHERE_USER
+export KEYSERVER
+export CHECK_KEYSERVER
+export REQUIRED_USER_KEY_CAPABILITY
+export GNUPGHOME_HOST
+export GNUPGHOME_AUTHENTICATION
export GNUPGHOME
-mkdir -p -m 0700 "$GNUPGHOME"
case $COMMAND in
'update-users'|'update-user'|'u')
# set mode
MODE="authorized_keys"
+ # set gnupg home
+ GNUPGHOME="$GNUPGHOME_AUTHENTICATION"
+
+ # check to see if the gpg trust database has been initialized
+ if [ ! -s "${GNUPGHOME}/trustdb.gpg" ] ; then
+ failure "GNUPG trust database uninitialized. Please see MONKEYSPHERE-SERVER(8)."
+ fi
+
# make sure the authorized_keys directory exists
mkdir -p "${VARLIB}/authorized_keys"
- # set GNUPGHOME, and make sure the directory exists
- GNUPGHOME="$GNUPGHOME_AUTHENTICATION"
- export GNUPGHOME
- mkdir -p -m 0700 "$GNUPGHOME"
-
# loop over users
for uname in $unames ; do
# check all specified users exist
rawAuthorizedKeys=$(translate_ssh_variables "$uname" "$RAW_AUTHORIZED_KEYS")
# if neither is found, skip user
- if [ ! -s "$authorizedUserIDs" -a ! -s "$rawAuthorizedKeys" ] ; then
- continue
+ if [ ! -s "$authorizedUserIDs" ] ; then
+ if [ "$rawAuthorizedKeys" = '-' -o ! -s "$rawAuthorizedKeys" ] ; then
+ continue
+ fi
fi
log "----- user: $uname -----"
- # temporary authorized_keys file
- AUTHORIZED_KEYS=$(mktemp)
+ # make temporary directory
+ TMPDIR=$(mktemp -d)
+
+ # trap to delete temporary directory on exit
+ trap "rm -rf $TMPDIR" EXIT
+
+ # create temporary authorized_user_ids file
+ TMP_AUTHORIZED_USER_IDS="${TMPDIR}/authorized_user_ids"
+ touch "$TMP_AUTHORIZED_USER_IDS"
- # trap to delete file on exit
- trap "rm -f $AUTHORIZE_KEYS" EXIT
+ # create temporary authorized_keys file
+ AUTHORIZED_KEYS="${TMPDIR}/authorized_keys"
+ touch "$AUTHORIZED_KEYS"
- # process authorized_user_ids file
+ # set restrictive permissions on the temporary files
+ # FIXME: is there a better way to do this?
+ chmod 0700 "$TMPDIR"
+ chmod 0600 "$AUTHORIZED_KEYS"
+ chmod 0600 "$TMP_AUTHORIZED_USER_IDS"
+ chown -R "$MONKEYSPHERE_USER" "$TMPDIR"
+
+ # if the authorized_user_ids file exists...
if [ -s "$authorizedUserIDs" ] ; then
- log "processing authorized_user_ids file..."
- process_authorized_user_ids "$authorizedUserIDs"
+ # copy user authorized_user_ids file to temporary
+ # location
+ cat "$authorizedUserIDs" > "$TMP_AUTHORIZED_USER_IDS"
+
+ # export needed variables
+ export AUTHORIZED_KEYS
+ export TMP_AUTHORIZED_USER_IDS
+
+ # process authorized_user_ids file, as monkeysphere
+ # user
+ su --preserve-environment "$MONKEYSPHERE_USER" -c -- \
+ ". ${SHARE}/common; process_authorized_user_ids $TMP_AUTHORIZED_USER_IDS"
fi
# add user-controlled authorized_keys file path if specified
- if [ "$RAW_AUTHORIZED_KEYS" != '-' ] ; then
- if [ -s "$rawAuthorizedKeys" ] ; then
- log -n "adding raw authorized_keys file... "
- cat "$rawAuthorizedKeys" >> "$AUTHORIZED_KEYS"
- loge "done."
- fi
+ if [ "$rawAuthorizedKeys" != '-' -a -s "$rawAuthorizedKeys" ] ; then
+ log -n "adding raw authorized_keys file... "
+ cat "$rawAuthorizedKeys" >> "$AUTHORIZED_KEYS"
+ loge "done."
fi
+ # openssh appears to check the contents of the
+ # authorized_keys file as the user in question, so the
+ # file must be readable by that user at least.
+ # FIXME: is there a better way to do this?
+ chown root "$AUTHORIZED_KEYS"
+ chgrp $(getent passwd "$uname" | cut -f4 -d:) "$AUTHORIZED_KEYS"
+ chmod g+r "$AUTHORIZED_KEYS"
+
# if the resulting authorized_keys file is not empty, move
- # the temp authorized_keys file into place
- if [ -s "$AUTHORIZED_KEYS" ] ; then
- # openssh appears to check the contents of the
- # authorized_keys file as the user in question, so the
- # file must be readable by that user at least.
- # FIXME: is there a better way to do this?
- chgrp $(getent passwd "$uname" | cut -f4 -d:) "$AUTHORIZED_KEYS"
- chmod g+r "$AUTHORIZED_KEYS"
-
- mv -f "$AUTHORIZED_KEYS" "${VARLIB}/authorized_keys/${uname}"
-
- log "authorized_keys file updated."
-
- # else destroy it
- else
- rm -f "$AUTHORIZED_KEYS"
- fi
+ # it into place
+ mv -f "$AUTHORIZED_KEYS" "${VARLIB}/authorized_keys/${uname}"
+
+ log "authorized_keys file updated."
+
+ # destroy temporary directory
+ rm -rf "$TMPDIR"
done
;;
'gen-key'|'g')
- gen_key "$1"
+ # set gnupg home
+ GNUPGHOME="$GNUPGHOME_HOST"
+ gen_key "$@"
;;
'show-fingerprint'|'f')
+ # set gnupg home
+ GNUPGHOME="$GNUPGHOME_HOST"
fingerprint_server_key "$@"
;;
'publish-key'|'p')
+ # set gnupg home
+ GNUPGHOME="$GNUPGHOME_HOST"
publish_server_key
;;
- 'trust-key'|'trust-key'|'t')
+ 'trust-key'|'t')
trust_key "$@"
;;
projects / monkeysphere.git / commitdiff