X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fmonkeysphere-server;h=a198c33c762e7dd005f7c2f80e164cc662c6d7b2;hb=7d02db7106da26f7705563297544a4ba1edfc71b;hp=0ff06af5b261d67b0c3b011faef74f3687ff4b4c;hpb=ba14c70659e154c3af63e1ee2480a6a75b7ac0e5;p=monkeysphere.git

diff --git a/src/monkeysphere-server b/src/monkeysphere-server
index 0ff06af..a198c33 100755
--- a/src/monkeysphere-server
+++ b/src/monkeysphere-server
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # monkeysphere-server: MonkeySphere server admin tool
 #
@@ -11,9 +11,12 @@
 ########################################################################
 PGRM=$(basename $0)
 
-SHAREDIR=${SHAREDIR:-"/usr/share/monkeysphere"}
-export SHAREDIR
-. "${SHAREDIR}/common"
+SHARE=${SHARE:-"/usr/share/monkeysphere"}
+export SHARE
+. "${SHARE}/common"
+
+VARLIB="/var/lib/monkeysphere"
+export VARLIB
 
 # date in UTF format if needed
 DATE=$(date -u '+%FT%T')
@@ -21,6 +24,9 @@ DATE=$(date -u '+%FT%T')
 # unset some environment variables that could screw things up
 GREP_OPTIONS=
 
+# default return code
+ERR=0
+
 ########################################################################
 # FUNCTIONS
 ########################################################################
@@ -28,14 +34,14 @@ GREP_OPTIONS=
 usage() {
 cat <<EOF
 usage: $PGRM <subcommand> [args]
-Monkeysphere server admin tool.
+MonkeySphere server admin tool.
 
 subcommands:
-  update-users (s) [USER]...            update users authorized_keys files
-  gen-key (g)                           generate gpg key for the server
-  publish-key (p)                       publish server key to keyserver
-  trust-keys (t) KEYID...               mark keyids as trusted
-  update-user-userids (u) USER UID...   add/update userids for a user
+  update-users (u) [USER]...            update users authorized_keys files
+  gen-key (g) [HOSTNAME]                generate gpg key for the server
+  show-fingerprint (f)                  show server's host key fingerprint
+  publish-key (p)                       publish server's host key to keyserver
+  trust-key (t) KEYID [LEVEL]           set owner trust for keyid
   help (h,?)                            this help
 
 EOF
@@ -43,25 +49,46 @@ EOF
 
 # generate server gpg key
 gen_key() {
+    local hostName
+
+    hostName=${1:-$(hostname --fqdn)}
+
+    SERVICE=${SERVICE:-"ssh"}
+    userID="${SERVICE}://${hostName}"
+
+    if gpg --list-key ="$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:-"encrypt,auth"}
-    SERVICE=${SERVICE:-"ssh"}
-    HOSTNAME_FQDN=${HOSTNAME_FQDN:-$(hostname -f)}
-
-    USERID=${USERID:-"$SERVICE"://"$HOSTNAME_FQDN"}
+    KEY_USAGE=${KEY_USAGE:-"auth"}
+    KEY_EXPIRE=${KEY_EXPIRE:-"0"}
+    cat <<EOF
+Please specify how long the key should be valid.
+         0 = key does not expire
+      <n>  = key expires in n days
+      <n>w = key expires in n weeks
+      <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"}
 
     # set key parameters
     keyParameters=$(cat <<EOF
 Key-Type: $KEY_TYPE
 Key-Length: $KEY_LENGTH
 Key-Usage: $KEY_USAGE
-Name-Real: $USERID
+Name-Real: $userID
+Expire-Date: $KEY_EXPIRE
 EOF
 )
 
     # add the revoker field if requested
+    # FIXME: the "1:" below assumes that $REVOKER's key is an RSA key.  why?
+    # FIXME: why is this marked "sensitive"?  how will this signature ever
+    # be transmitted to the expected revoker?
     if [ "$REVOKER" ] ; then
 	keyParameters="${keyParameters}"$(cat <<EOF
 
@@ -70,18 +97,14 @@ EOF
 )
     fi
 
-    log "The following key parameters will be used:"
+    echo "The following key parameters will be used:"
     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
 
-    if gpg --list-key ="$USERID" > /dev/null 2>&1 ; then
-	failure "key for '$USERID' already exists"
-    fi
-
     # add commit command
     keyParameters="${keyParameters}"$(cat <<EOF
 
@@ -90,23 +113,33 @@ EOF
 EOF
 )
 
-    echo "generating server key..."
+    log "generating server key... "
     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}" | \
+	grep '^fpr:' | head -1 | cut -d: -f10)
+
+    # write the key to the file
+    # NOTE: assumes that the primary key is the proper key to use
+    (umask 077 && gpgsecret2ssh "$keyID" > "${MS_HOME}/ssh_host_rsa_key")
+    log "Private SSH host key output to file: ${MS_HOME}/ssh_host_rsa_key"
 }
 
-# publish server key to keyserver
-publish_key() {
-    read -p "publish key to $KEYSERVER? [Y|n]: " OK; OK=${OK:=Y}
-    if [ ${OK/y/Y} != 'Y' ] ; then
-	failure "aborting."
-    fi
+# gpg output key fingerprint
+fingerprint_server_key() {
+    local ID
 
-    keyID=$(gpg --list-key --with-colons ="$USERID" 2> /dev/null | grep '^pub:' | cut -d: -f5)
+    if [ -z "$1" ] ; then
+	ID="$1"
+    else
+	ID="=ssh://$(hostname --fqdn)"
+    fi
 
-    # dummy command so as not to publish fakes keys during testing
-    # eventually:
-    #gpg --send-keys --keyserver "$KEYSERVER" "$keyID"
-    echo "NOT PUBLISHED: gpg --send-keys --keyserver $KEYSERVER $keyID"
+    gpg --fingerprint --list-secret-keys "$ID"
 }
 
 ########################################################################
@@ -125,83 +158,118 @@ MS_CONF=${MS_CONF:-"$MS_HOME"/monkeysphere-server.conf}
 [ -e "$MS_CONF" ] && . "$MS_CONF"
 
 # set empty config variable with defaults
-GNUPGHOME=${GNUPGHOME:-"$MS_HOME"/gnupg}
-KEYSERVER=${KEYSERVER:-subkeys.pgp.net}
-REQUIRED_KEY_CAPABILITY=${REQUIRED_KEY_CAPABILITY:-"e a"}
-USER_CONTROLLED_AUTHORIZED_KEYS=${USER_CONTROLLED_AUTHORIZED_KEYS:-%h/.ssh/authorized_keys}
-
+KEYSERVER=${KEYSERVER:-"subkeys.pgp.net"}
+CHECK_KEYSERVER=${CHECK_KEYSERVER:="true"}
+AUTHORIZED_USER_IDS=${AUTHORIZED_USER_IDS:-"%h/.config/monkeysphere/authorized_user_ids"}
+RAW_AUTHORIZED_KEYS=${RAW_AUTHORIZED_KEYS:-"%h/.ssh/authorized_keys"}
+
+# other variables
+REQUIRED_USER_KEY_CAPABILITY=${REQUIRED_USER_KEY_CAPABILITY:-"a"}
+GNUPGHOME_HOST=${GNUPGHOME_HOST:-"${VARLIB}/gnupg-host"}
+GNUPGHOME_AUTHENTICATION=${GNUPGHOME_AUTHENTICATION:-"${VARLIB}/gnupg-authentication"}
+
+# set default GNUPGHOME, and make sure the directory exists
+GNUPGHOME="$GNUPGHOME_HOST"
 export GNUPGHOME
-
-# make sure gpg home exists with proper permissions
 mkdir -p -m 0700 "$GNUPGHOME"
 
 case $COMMAND in
-    'update-users'|'s')
+    'update-users'|'update-user'|'u')
 	if [ "$1" ] ; then
+	    # get users from command line
 	    unames="$@"
 	else
-	    unames=$(ls -1 "$MS_HOME"/authorized_user_ids)
+	    # or just look at all users if none specified
+	    unames=$(getent passwd | cut -d: -f1)
 	fi
 
+	# set mode
+	MODE="authorized_keys"
+
+        # 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 $unames ; do
-	    MODE="authorized_keys"
+	    # check all specified users exist
+	    if ! getent passwd "$uname" >/dev/null ; then
+		error "----- unknown user '$uname' -----"
+		continue
+	    fi
+
+	    # set authorized_user_ids and raw authorized_keys variables,
+	    # translating ssh-style path variables
+	    authorizedUserIDs=$(translate_ssh_variables "$uname" "$AUTHORIZED_USER_IDS")
+	    rawAuthorizedKeys=$(translate_ssh_variables "$uname" "$RAW_AUTHORIZED_KEYS")
+
+	    # if neither is found, skip user
+	    if [ ! -s "$authorizedUserIDs" -a ! -s "$rawAuthorizedKeys" ] ; then
+		continue
+	    fi
 
 	    log "----- user: $uname -----"
 
-	    AUTHORIZED_USER_IDS="$MS_HOME"/authorized_user_ids/"$uname"
-	    msAuthorizedKeys="$CACHE"/"$uname"/authorized_keys
-	    cacheDir="$CACHE"/"$uname"/user_keys
+	    # temporary authorized_keys file
+	    AUTHORIZED_KEYS=$(mktemp)
 
-            # make sure authorized_user_ids file exists
-	    if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then
-		log "authorized_user_ids file for '$uname' is empty or does not exist."
-		continue
+	    # trap to delete file on exit
+	    trap "rm -f $AUTHORIZE_KEYS" EXIT
+
+	    # process authorized_user_ids file
+	    if [ -s "$authorizedUserIDs" ] ; then
+		log "processing authorized_user_ids file..."
+		process_authorized_user_ids "$authorizedUserIDs"
 	    fi
 
-	    # set user-controlled authorized_keys file path
-	    if [ "$USER_CONTROLLED_AUTHORIZED_KEYS" ] ; then
-		userHome=$(getent passwd "$uname" | cut -d: -f6)
-		userAuthorizedKeys=${USER_CONTROLLED_AUTHORIZED_KEYS/\%h/"$userHome"}
+	    # add user-controlled authorized_keys file path if specified
+	    if [ "$RAW_AUTHORIZED_KEYS" != '-' ] ; then
+		if [ -s "$rawAuthorizedKeys" ] ; then
+		    log -n "adding raw authorized_keys file... "
+		    cat "$rawAuthorizedKeys" >> "$AUTHORIZED_KEYS"
+		    loge "done."
+		fi
 	    fi
 
-	    # update authorized_keys
-	    update_authorized_keys "$msAuthorizedKeys" "$userAuthorizedKeys" "$cacheDir"
-	done
+	    # if the resulting authorized_keys file is not empty, move
+	    # the temp authorized_keys file into place
+	    if [ -s "$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 "----- done. -----"
+		log "authorized_keys file updated."
+
+	    # else destroy it
+	    else
+		rm -f "$AUTHORIZED_KEYS"
+	    fi
+	done
 	;;
 
     'gen-key'|'g')
-	gen_key
+	gen_key "$1"
 	;;
 
-    'publish-key'|'p')
-	publish_key
+    'show-fingerprint'|'f')
+	fingerprint_server_key "$@"
 	;;
 
-    'trust-keys'|'t')
-	if [ -z "$1" ] ; then
-	    failure "you must specify at least one key to trust."
-	fi
-	for keyID ; do
-	    trust_key "$keyID"
-	done
+    'publish-key'|'p')
+	publish_server_key
 	;;
 
-    'update-user-userids'|'u')
-	uname="$1"
-	shift
-	if [ -z "$uname" ] ; then
-	    failure "you must specify user."
-	fi
-	if [ -z "$1" ] ; then
-	    failure "you must specify at least one userid."
-	fi
-	AUTHORIZED_USER_IDS="$MS_HOME"/authorized_user_ids/"$uname"
-	cacheDir="$CACHE"/"$uname"/user_keys
-	for userID ; do
-	    update_userid "$userID" "$cacheDir"
-	done
+    'trust-key'|'trust-key'|'t')
+	trust_key "$@"
 	;;
 
     'help'|'h'|'?')
@@ -210,6 +278,8 @@ case $COMMAND in
 
     *)
         failure "Unknown command: '$COMMAND'
-Type 'cereal-admin help' for usage."
+Type '$PGRM help' for usage."
         ;;
 esac
+
+exit "$ERR"