X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fmonkeysphere;h=cd7719345caefedbc9068327d809d6908d2941df;hb=dda1c93bc94daa24bf7b0f5671f8a222c0089efd;hp=58f0fdc632edaeb8f7aa679b24dbfa6e6c81809c;hpb=736054b1c1d8e3433d709ea8bbeb1b8ac7257927;p=monkeysphere.git

diff --git a/src/monkeysphere b/src/monkeysphere
index 58f0fdc..cd77193 100755
--- a/src/monkeysphere
+++ b/src/monkeysphere
@@ -11,18 +11,21 @@
 ########################################################################
 PGRM=$(basename $0)
 
-SHAREDIR=${SHAREDIR:-"/usr/share/monkeysphere"}
-export SHAREDIR
-. "${SHAREDIR}/common"
-
-GLOBAL_CONFIG=${GLOBAL_CONFIG:-"${ETC}/monkeysphere.conf"}
-[ -r "$GLOBAL_CONFIG" ] && . "$GLOBAL_CONFIG"
+SHARE=${MONKEYSPHERE_SHARE:-"/usr/share/monkeysphere"}
+export SHARE
+. "${SHARE}/common" || exit 1
 
 # date in UTF format if needed
 DATE=$(date -u '+%FT%T')
 
 # unset some environment variables that could screw things up
-GREP_OPTIONS=
+unset GREP_OPTIONS
+
+# default return code
+RETURN=0
+
+# set the file creation mask to be only owner rw
+umask 077
 
 ########################################################################
 # FUNCTIONS
@@ -30,13 +33,15 @@ GREP_OPTIONS=
 
 usage() {
 cat <<EOF
-usage: $PGRM <subcommand> [args]
+usage: $PGRM <subcommand> [options] [args]
 MonkeySphere client tool.
 
 subcommands:
   update-known_hosts (k) [HOST]...  update known_hosts file
   update-authorized_keys (a)        update authorized_keys file
   gen-subkey (g) KEYID              generate an 'a' capable subkey
+    -l|--length BITS                  key length in bits (2048)
+    -e|--expire EXPIRE                date to expire
   help (h,?)                        this help
 
 EOF
@@ -45,26 +50,73 @@ EOF
 # generate a subkey with the 'a' usage flags set
 # FIXME: this needs some tweaking to clean it up
 gen_subkey(){
+    local keyLength
+    local keyExpire
     local keyID
     local gpgOut
     local userID
 
+    # set default key parameter values
+    keyLength=
+    keyExpire=
+
+    # get options
+    TEMP=$(getopt -o l:e: -l length:,expire: -n "$PGRM" -- "$@")
+
+    if [ $? != 0 ] ; then
+	exit 1
+    fi
+
+    # Note the quotes around `$TEMP': they are essential!
+    eval set -- "$TEMP"
+
+    while true ; do
+	case "$1" in
+	    -l|--length)
+		keyLength="$2"
+		shift 2
+		;;
+	    -e|--expire)
+		keyExpire="$2"
+		shift 2
+		;;
+	    --)
+		shift
+		;;
+            *)
+		break
+		;;
+	esac
+    done
+
     keyID="$1"
+    if [ -z "$keyID" ] ; then
+	failure "You must specify the key ID of your primary key."
+    fi
 
-    gpgOut=$(gpg --quiet --fixed-list-mode --list-keys --with-colons \
-	"$keyID" 2> /dev/null)
+    # get key output, and fail if not found
+    gpgOut=$(gpg --quiet --fixed-list-mode --list-secret-keys --with-colons \
+	"$keyID") || failure
 
-    # return 1 if there only "tru" lines are output from gpg
-    if [ -z "$(echo "$gpgOut" | grep -v '^tru:')" ] ; then
-	failure "Key ID '$keyID' not found."
+    # fail if multiple sec lines are returned, which means the id
+    # given is not unique
+    if [ $(echo "$gpgOut" | grep '^sec:' | wc -l) -gt '1' ] ; then
+	failure "Key ID '$keyID' is not unique."
+    fi
+
+    # prompt if an authentication subkey already exists
+    if echo "$gpgOut" | egrep "^(sec|ssb):" | cut -d: -f 12 | grep -q a ; then
+	echo "An authentication subkey already exists for key '$keyID'."
+	read -p "Are you sure you would like to generate another one? (y/N) " OK; OK=${OK:N}
+	if [ "${OK/y/Y}" != 'Y' ] ; then
+	    failure "aborting."
+	fi
     fi
 
     # set subkey defaults
-    SUBKEY_TYPE=${SUBKEY_TYPE:-"RSA"}
-    #SUBKEY_LENGTH=${SUBKEY_LENGTH:-"2048"}
-    SUBKEY_USAGE=${SUBKEY_USAGE:-"auth"}
-    SUBKEY_EXPIRE=${SUBKEY_EXPIRE:-"0"}
-    cat <<EOF
+    # prompt about key expiration if not specified
+    if [ -z "$keyExpire" ] ; then
+	cat <<EOF
 Please specify how long the key should be valid.
          0 = key does not expire
       <n>  = key expires in n days
@@ -72,7 +124,16 @@ Please specify how long the key should be valid.
       <n>m = key expires in n months
       <n>y = key expires in n years
 EOF
-    read -p "Key is valid for? ($SUBKEY_EXPIRE) " SUBKEY_EXPIRE; SUBKEY_EXPIRE=${SUBKEY_EXPIRE:-"0"}
+	while [ -z "$keyExpire" ] ; do
+	    read -p "Key is valid for? (0) " keyExpire
+	    if ! test_gpg_expire ${keyExpire:=0} ; then
+		echo "invalid value"
+		unset keyExpire
+	    fi
+	done
+    elif ! test_gpg_expire "$keyExpire" ; then
+	failure "invalid key expiration value '$keyExpire'."
+    fi
 
     # generate the list of commands that will be passed to edit-key
     editCommands=$(cat <<EOF
@@ -82,8 +143,8 @@ S
 E
 A
 Q
-$SUBKEY_LENGTH
-$SUBKEY_EXPIRE
+$keyLength
+$keyExpire
 save
 EOF
 )
@@ -97,84 +158,102 @@ EOF
 # MAIN
 ########################################################################
 
-COMMAND="$1"
-[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
-shift
-
-# set ms home directory
-MS_HOME=${MS_HOME:-"${HOME}/.config/monkeysphere"}
-
-# load configuration file
-MS_CONF=${MS_CONF:-"${MS_HOME}/monkeysphere.conf"}
-[ -e "$MS_CONF" ] && . "$MS_CONF"
-
-# set empty config variable with defaults
-AUTHORIZED_USER_IDS=${AUTHORIZED_USER_IDS:-"${MS_HOME}/authorized_user_ids"}
-GNUPGHOME=${GNUPGHOME:-"${HOME}/.gnupg"}
-KEYSERVER=${KEYSERVER:-"subkeys.pgp.net"}
-CHECK_KEYSERVER=${CHECK_KEYSERVER:="true"}
-REQUIRED_HOST_KEY_CAPABILITY=${REQUIRED_HOST_KEY_CAPABILITY:-"a"}
-REQUIRED_USER_KEY_CAPABILITY=${REQUIRED_USER_KEY_CAPABILITY:-"a"}
-KNOWN_HOSTS=${KNOWN_HOSTS:-"${HOME}/.ssh/known_hosts"}
-AUTHORIZED_KEYS=${AUTHORIZED_KEYS:-"${HOME}/.ssh/authorized_keys"}
-HASH_KNOWN_HOSTS=${HASH_KNOWN_HOSTS:-"true"}
-
+# unset variables that should be defined only in config file
+unset KEYSERVER
+unset CHECK_KEYSERVER
+unset KNOWN_HOSTS
+unset HASH_KNOWN_HOSTS
+unset AUTHORIZED_KEYS
+
+# load global config
+[ -r "${ETC}/monkeysphere.conf" ] && . "${ETC}/monkeysphere.conf"
+
+# set monkeysphere home directory
+MONKEYSPHERE_HOME=${MONKEYSPHERE_HOME:="${HOME}/.config/monkeysphere"}
+mkdir -p -m 0700 "$MONKEYSPHERE_HOME"
+
+# load local config
+[ -e ${MONKEYSPHERE_CONFIG:="${MONKEYSPHERE_HOME}/monkeysphere.conf"} ] && . "$MONKEYSPHERE_CONFIG"
+
+# set empty config variables with ones from the environment, or from
+# config file, or with defaults
+GNUPGHOME=${MONKEYSPHERE_GNUPGHOME:=${GNUPGHOME:="${HOME}/.gnupg"}}
+KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="subkeys.pgp.net"}}
+CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
+KNOWN_HOSTS=${MONKEYSPHERE_KNOWN_HOSTS:=${KNOWN_HOSTS:="${HOME}/.ssh/known_hosts"}}
+HASH_KNOWN_HOSTS=${MONKEYSPHERE_HASH_KNOWN_HOSTS:=${HASH_KNOWN_HOSTS:="true"}}
+AUTHORIZED_KEYS=${MONKEYSPHERE_AUTHORIZED_KEYS:=${AUTHORIZED_KEYS:="${HOME}/.ssh/authorized_keys"}}
+
+# other variables not in config file
+AUTHORIZED_USER_IDS=${MONKEYSPHERE_AUTHORIZED_USER_IDS:="${MONKEYSPHERE_HOME}/authorized_user_ids"}
+REQUIRED_HOST_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_HOST_KEY_CAPABILITY:="a"}
+REQUIRED_USER_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"}
+
+# export GNUPGHOME and make sure gpg home exists with proper
+# permissions
 export GNUPGHOME
-
-# make sure gpg home exists with proper permissions
 mkdir -p -m 0700 "$GNUPGHOME"
 
-# make sure the user monkeysphere home directory exists
-mkdir -p -m 0700 "$MS_HOME"
-touch "$AUTHORIZED_USER_IDS"
-touch "$AUTHORIZED_KEYS"
+# get subcommand
+COMMAND="$1"
+[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
+shift
 
 case $COMMAND in
     'update-known_hosts'|'update-known-hosts'|'k')
 	MODE='known_hosts'
 
-        # touch the known_hosts file to make sure it exists
-	# ssh-keygen complains if it doesn't exist
-	touch "$KNOWN_HOSTS"
+	# check permissions on the known_hosts file path
+	if ! check_key_file_permissions "$USER" "$KNOWN_HOSTS" ; then
+	    failure "Improper permissions on known_hosts file path."
+	fi
 
         # if hosts are specified on the command line, process just
         # those hosts
 	if [ "$1" ] ; then
-	    process_hosts_known_hosts "$@"
+	    update_known_hosts "$@"
+	    RETURN="$?"
 
         # otherwise, if no hosts are specified, process every host
         # in the user's known_hosts file
 	else
-	    if [ ! -s "$KNOWN_HOSTS" ] ; then
-		failure "known_hosts file '$KNOWN_HOSTS' is empty."
+	    # exit if the known_hosts file does not exist
+	    if [ ! -e "$KNOWN_HOSTS" ] ; then
+		log "known_hosts file '$KNOWN_HOSTS' does not exist."
+		exit
 	    fi
-	    log "processing known_hosts file..."
+
 	    process_known_hosts
+	    RETURN="$?"
 	fi
-
-	log "known_hosts file updated."
 	;;
 
     'update-authorized_keys'|'update-authorized-keys'|'a')
 	MODE='authorized_keys'
 
-        # fail if the authorized_user_ids file is empty
-	if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then
-	    failure "$AUTHORIZED_USER_IDS is empty."
+	# check permissions on the authorized_user_ids file path
+	if ! check_key_file_permissions "$USER" "$AUTHORIZED_USER_IDS" ; then
+	    failure "Improper permissions on authorized_user_ids file path."
+	fi
+
+	# check permissions on the authorized_keys file path
+	if ! check_key_file_permissions "$USER" "$AUTHORIZED_KEYS" ; then
+	    failure "Improper permissions on authorized_keys file path."
+	fi
+
+        # exit if the authorized_user_ids file is empty
+	if [ ! -e "$AUTHORIZED_USER_IDS" ] ; then
+	    log "authorized_user_ids file '$AUTHORIZED_USER_IDS' does not exist."
+	    exit
 	fi
 
 	# process authorized_user_ids file
-	log "processing authorized_user_ids file..."
 	process_authorized_user_ids "$AUTHORIZED_USER_IDS"
-	log "authorized_keys file updated."
+	RETURN="$?"
 	;;
 
     'gen-subkey'|'g')
-	keyID="$1"
-	if [ -z "$keyID" ] ; then
-	    failure "You must specify the key ID of your primary key."
-	fi
-	gen_subkey "$keyID"
+	gen_subkey "$@"
 	;;
 
     'help'|'h'|'?')
@@ -186,3 +265,5 @@ case $COMMAND in
 Type '$PGRM help' for usage."
         ;;
 esac
+
+exit "$RETURN"