X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fmonkeysphere-server;h=db2f428e5a9377caa2628ee7966ec2bb03b8a7ab;hb=0f1c6ac9c3c18a46720a8b96854a6624f3a1b8df;hp=f1b4892f75b33cd328dc1096389c59cf23eefbad;hpb=4793624c65673268128fb0146cd9bd1b3cfeb6c4;p=monkeysphere.git

diff --git a/src/monkeysphere-server b/src/monkeysphere-server
index f1b4892..db2f428 100755
--- a/src/monkeysphere-server
+++ b/src/monkeysphere-server
@@ -1,4 +1,12 @@
-#!/bin/sh
+#!/bin/bash
+
+# monkeysphere-server: MonkeySphere server admin tool
+#
+# The monkeysphere scripts are written by:
+# Jameson Rollins <jrollins@fifthhorseman.net>
+#
+# They are Copyright 2008, and are all released under the GPL, version 3
+# or later.
 
 ########################################################################
 PGRM=$(basename $0)
@@ -13,6 +21,9 @@ DATE=$(date -u '+%FT%T')
 # unset some environment variables that could screw things up
 GREP_OPTIONS=
 
+# default return code
+ERR=0
+
 ########################################################################
 # FUNCTIONS
 ########################################################################
@@ -20,82 +31,111 @@ GREP_OPTIONS=
 usage() {
 cat <<EOF
 usage: $PGRM <subcommand> [args]
-Monkeysphere server admin tool.
+MonkeySphere server admin tool.
 
 subcommands:
-  update-users (s) [USER]...                update authorized_keys file
-  gen-key (g)                               generate gpg key for the host
-  publish-key (p)                           publish host gpg to keyserver
-  trust-key (t) KEYID [KEYID]...            mark keyid as trusted
-  update-user-userid (u) USER UID [UID]...  add/update userid for user
-  help (h,?)                                this help
+  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
 }
 
 # generate server gpg key
 gen_key() {
-    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)}
+    local hostName
+
+    hostName=${1:-$(hostname --fqdn)}
+    service=${SERVICE:-"ssh"}
+    userID="${service}://${hostName}"
 
-    USERID=${USERID:-"$SERVICE"://"$HOSTNAME_FQDN"}
+    if gpg --list-key ="$userID" > /dev/null 2>&1 ; then
+	failure "Key for '$userID' already exists"
+    fi
 
-    echo "key parameters:"
+    # 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
+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
+
+Revoker: 1:$REVOKER sensitive
+EOF
+)
+    fi
+
+    echo "The following key parameters will be used:"
+    echo "$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
 
-    echo "generating server key..."
-    gpg --batch --gen-key <<EOF
-Key-Type: $KEY_TYPE
-Key-Length: $KEY_LENGTH
-Key-Usage: $KEY_USAGE
-Name-Real: $USERID
 %commit
+%echo done
 EOF
-}
+)
 
-# publish server key to keyserver
-publish_key() {
-    read -p "publish key to $KEYSERVER? [Y|n]: " OK; OK=${OK:=Y}
-    if [ ${OK/y/Y} != 'Y' ] ; then
-	failure "aborting."
-    fi
+    log "generating server key... "
+    echo "$keyParameters" | gpg --batch --gen-key
+
+    # output the server fingerprint
+    fingerprint_server_key "=${userID}"
 
-    keyID=$(gpg --list-key --with-colons ="$USERID" 2> /dev/null | grep '^pub:' | cut -d: -f5)
+    # 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)
 
-    # dummy command so as not to publish fakes keys during testing
-    # eventually:
-    #gpg --send-keys --keyserver "$KEYSERVER" "$keyID"
-    echo "gpg --send-keys --keyserver $KEYSERVER $keyID"
+    # write the key to the file
+    # NOTE: assumes that the primary key is the proper key to use
+    (umask 077 && gpgsecret2ssh "$keyID" > "${MS_HOME}/ssh_host_rsa_key")
+    log "Private SSH host key output to file: ${MS_HOME}/ssh_host_rsa_key"
 }
 
-# trust key
-trust_key() {
-    for keyID ; do
-	# get the key from the key server
-	gpg --keyserver "$KEYSERVER" --recv-key "$keyID" || failure "could not retrieve key '$keyID'"
-
-	# edit the key to change trust
-	# FIXME: need to figure out how to automate this,
-	# in a batch mode or something.
-	gpg --edit-key "$keyID"
-    done
+# gpg output key fingerprint
+fingerprint_server_key() {
+    local ID
+
+    if [ -z "$1" ] ; then
+	ID="$1"
+    else
+	ID="=ssh://$(hostname --fqdn)"
+    fi
+
+    gpg --fingerprint --list-secret-keys "$ID"
 }
 
 ########################################################################
@@ -114,98 +154,102 @@ 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=${USER_CONTROLLED_AUTHORIZED_KEYS:-%h/.ssh/authorized_keys}
-STAGING_AREA=${STAGING_AREA:-"$LIB"/stage}
+GNUPGHOME=${GNUPGHOME:-"${MS_HOME}/gnupg"}
+KEYSERVER=${KEYSERVER:-"subkeys.pgp.net"}
+CHECK_KEYSERVER=${CHECK_KEYSERVER:="true"}
+REQUIRED_USER_KEY_CAPABILITY=${REQUIRED_USER_KEY_CAPABILITY:-"a"}
+AUTHORIZED_USER_IDS=${AUTHORIZED_USER_IDS:-"%h/.config/monkeysphere/authorized_user_ids"}
+USER_CONTROLLED_AUTHORIZED_KEYS=${USER_CONTROLLED_AUTHORIZED_KEYS:-"%h/.ssh/authorized_keys"}
 
 export GNUPGHOME
 
+# make sure the monkeysphere home directory exists
+mkdir -p "${MS_HOME}/authorized_user_ids"
 # make sure gpg home exists with proper permissions
 mkdir -p -m 0700 "$GNUPGHOME"
+# make sure the authorized_keys directory exists
+mkdir -p "${CACHE}/authorized_keys"
 
 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
 
+	# loop over users
 	for uname in $unames ; do
 	    MODE="authorized_keys"
-	    authorizedUserIDs="$MS_HOME"/authorized_user_ids/"$uname"
-	    cacheDir="$STAGING_AREA"/"$uname"/user_keys
-	    msAuthorizedKeys="$STAGING_AREA"/"$uname"/authorized_keys
 
-            # make sure authorized_user_ids file exists
-	    if [ ! -s "$authorizedUserIDs" ] ; then
-		log "authorized_user_ids file for '$uname' is empty or does not exist."
+	    # check all specified users exist
+	    if ! getent passwd "$uname" >/dev/null ; then
+		error "----- unknown user '$uname' -----"
 		continue
 	    fi
 
-	    log "processing authorized_keys for user '$uname'..."
+	    log "----- user: $uname -----"
 
-	    process_authorized_ids "$authorizedUserIDs" "$cacheDir"
+	    # set authorized_user_ids variable, translating ssh-style
+	    # path variables
+	    authorizedUserIDs=$(translate_ssh_variables "$uname" "$AUTHORIZED_USER_IDS")
 
-            # write output key file
-	    log "writing monkeysphere authorized_keys file... "
-	    touch "$msAuthorizedKeys"
-	    if [ "$(ls "$cacheDir")" ] ; then
-		log -n "adding gpg keys... "
-		cat "$cacheDir"/* > "$msAuthorizedKeys"
-		echo "done."
-	    else
-		log "no gpg keys to add."
+	    # temporary authorized_keys file
+	    AUTHORIZED_KEYS=$(mktemp)
+
+	    # process authorized_user_ids file
+	    if [ -s "$authorizedUserIDs" ] ; then
+		log "processing authorized_user_ids file..."
+		process_authorized_user_ids "$authorizedUserIDs"
 	    fi
-	    if [ "$USER_CONTROLLED_AUTHORIZED_KEYS" ] ; then
-		userHome=$(getent passwd "$uname" | cut -d: -f6)
-		userAuthorizedKeys=${USER_CONTROLLED_AUTHORIZED_KEYS/\%h/"$userHome"}
+
+	    # add user-controlled authorized_keys file path if specified
+	    if [ "$USER_CONTROLLED_AUTHORIZED_KEYS" != '-' ] ; then
+		userAuthorizedKeys=$(translate_ssh_variables "$uname" "$USER_CONTROLLED_AUTHORIZED_KEYS")
 		if [ -s "$userAuthorizedKeys" ] ; then
-		    log -n "adding user authorized_keys file... "
-		    cat "$userAuthorizedKeys" >> "$msAuthorizedKeys"
-		    echo "done."
+		    log -n "adding user's authorized_keys file... "
+		    cat "$userAuthorizedKeys" >> "$AUTHORIZED_KEYS"
+		    loge "done."
 		fi
 	    fi
-	    log "monkeysphere authorized_keys file generated:"
-	    log "$msAuthorizedKeys"
+
+	    # if the resulting authorized_keys file is not empty
+	    if [ -s "$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"
+
+		# move the temp authorized_keys file into place
+		mv -f "$AUTHORIZED_KEYS" "${CACHE}/authorized_keys/${uname}"
+
+		log "authorized_keys file updated."
+
+	    # else destroy it
+	    else
+		rm -f "$AUTHORIZED_KEYS"
+	    fi
 	done
 	;;
 
     'gen-key'|'g')
-	gen_key
+	gen_key "$1"
 	;;
 
-    'publish-key'|'p')
-	publish_key
+    'show-fingerprint'|'f')
+	fingerprint_server_key "$@"
 	;;
 
-    'trust-key'|'t')
-	if [ -z "$1" ] ; then
-	    failure "you must specify at least one key to trust."
-	fi
-	trust_key "$@"
+    'publish-key'|'p')
+	publish_server_key
 	;;
 
-    'update-user-userid'|'u')
-	uname="$1"
-	shift
-	if [ -z "$uname" ] ; then
-	    failure "you must specify user."
-	fi
-	if [ -z "$1" ] ; then
-	    failure "you must specify at least one userid."
-	fi
-	for userID ; do
-	    AUTHORIZED_USER_IDS="$MS_HOME"/authorized_user_ids/"$uname"
-	    if ! grep -q "^${userID}\$" "$AUTHORIZED_USER_IDS" ; then
-		log "userid '$userID' not in authorized_user_ids file."
-		continue
-	    fi
-	    log "processing user id: '$userID'"
-	    process_user_id "$userID" "$userKeysCacheDir" > /dev/null
-	done
+    'trust-key'|'trust-key'|'t')
+	trust_key "$@"
 	;;
 
     'help'|'h'|'?')
@@ -214,6 +258,8 @@ case $COMMAND in
 
     *)
         failure "Unknown command: '$COMMAND'
-Type 'cereal-admin help' for usage."
+Type '$PGRM help' for usage."
         ;;
 esac
+
+exit "$ERR"