X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fmonkeysphere-host;h=4ec533d5e5ff92dd9733ac3a4f4b339e0cf65333;hb=8af517bd1dc3eea66a64387af3e69188a536b2ee;hp=aa764dbcd54cdabb415b23b8f226318d1eb080fc;hpb=770f45b0c1d72a1bb89fd98fe070a6dfdcc4c0bf;p=monkeysphere.git

diff --git a/src/monkeysphere-host b/src/monkeysphere-host
index aa764db..4ec533d 100755
--- a/src/monkeysphere-host
+++ b/src/monkeysphere-host
@@ -14,11 +14,15 @@
 ########################################################################
 set -e
 
+# set the pipefail option so pipelines fail on first command failure
+set -o pipefail
+
 PGRM=$(basename $0)
 
 SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"}
 export SYSSHAREDIR
-. "${SYSSHAREDIR}/common" || exit 1
+. "${SYSSHAREDIR}/defaultenv"
+. "${SYSSHAREDIR}/common"
 
 SYSDATADIR=${MONKEYSPHERE_SYSDATADIR:-"/var/lib/monkeysphere"}
 export SYSDATADIR
@@ -29,15 +33,15 @@ MHSHAREDIR="${SYSSHAREDIR}/mh"
 # datadir for host functions
 MHDATADIR="${SYSDATADIR}/host"
 
+# host pub key files
+HOST_KEY_FILE="${SYSDATADIR}/ssh_host_rsa_key.pub.gpg"
+
 # UTC date in ISO 8601 format if needed
 DATE=$(date -u '+%FT%T')
 
 # unset some environment variables that could screw things up
 unset GREP_OPTIONS
 
-# default return code
-RETURN=0
-
 ########################################################################
 # FUNCTIONS
 ########################################################################
@@ -48,42 +52,30 @@ usage: $PGRM <subcommand> [options] [args]
 Monkeysphere host admin tool.
 
 subcommands:
+ import-key (i) FILE NAME[:PORT]     import existing ssh key to gpg
  show-key (s)                        output all host key information
- set-expire (e) EXPIRE               set host key expiration
+ publish-key (p)                     publish host key to keyserver
+ set-expire (e) [EXPIRE]             set host key expiration
  add-hostname (n+) NAME[:PORT]       add hostname user ID to host key
  revoke-hostname (n-) NAME[:PORT]    revoke hostname user ID
- add-revoker (o) FINGERPRINT         add a revoker to the host key
- revoke-key (r)                      revoke host key
- publish-key (p)                     publish host key to keyserver
-
- expert <expert-subcommand>          run expert command
- expert help                         expert command help
+ add-revoker (r+) KEYID|FILE         add a revoker to the host key
+ revoke-key                          generate and/or publish revocation
+                                     certificate for host key
 
  version (v)                         show version number
  help (h,?)                          this help
 
+See ${PGRM}(8) for more info.
 EOF
 }
 
-# function to run command as monkeysphere user
-su_monkeysphere_user() {
-    # if the current user is the monkeysphere user, then just eval
-    # command
-    if [ $(id -un) = "$MONKEYSPHERE_USER" ] ; then
-	eval "$@"
-
-    # otherwise su command as monkeysphere user
-    else
-	su "$MONKEYSPHERE_USER" -c "$@"
-    fi
-}
-
 # function to interact with the gpg keyring
 gpg_host() {
-    GNUPGHOME="$GNUPGHOME_HOST" gpg "$@"
+    GNUPGHOME="$GNUPGHOME_HOST" gpg --no-greeting --quiet --no-tty "$@"
 }
 
-# command to list the info about the host key, in colon format
+# command to list the info about the host key, in colon format, to
+# stdout
 gpg_host_list() {
     gpg_host --list-keys --with-colons --fixed-list-mode \
 	--with-fingerprint --with-fingerprint \
@@ -93,200 +85,228 @@ gpg_host_list() {
 
 # command for edit key scripts, takes scripts on stdin
 gpg_host_edit() {
-    gpg_host --quiet --command-fd 0 --edit-key \
-	"0x${HOST_FINGERPRINT}!" "$@"
+    gpg_host --command-fd 0 --edit-key "0x${HOST_FINGERPRINT}!" "$@"
 }
 
-# output just key fingerprint
-fingerprint_host_key() {
-    # set the pipefail option so functions fails if can't read sec key
-    set -o pipefail
+# export the host public key to the monkeysphere gpg pub key file
+update_gpg_pub_file() {
+    log debug "updating openpgp public key file '$HOST_KEY_FILE'..."
+    gpg_host --export --armor --export-options export-minimal \
+	"0x${HOST_FINGERPRINT}!" > "$HOST_KEY_FILE"
+}
 
-    gpg_host --list-secret-keys --fingerprint \
-	--with-colons --fixed-list-mode 2> /dev/null | \
-	grep '^fpr:' | head -1 | cut -d: -f10 2>/dev/null
+# load the host fingerprint into the fingerprint variable, using the
+# export gpg pub key file
+# FIXME: this seems much less than ideal, with all this temp keyring
+# stuff.  is there a way we can do this without having to create temp
+# files?  what if we stored the fingerprint in MHDATADIR/fingerprint?
+load_fingerprint() {
+    if [ -f "$HOST_KEY_FILE" ] ; then
+	HOST_FINGERPRINT=$( \
+	    (FUBAR=$(msmktempdir) && export GNUPGHOME="$FUBAR" \
+	    && gpg --quiet --import \
+	    && gpg --quiet --list-keys --with-colons --with-fingerprint \
+	    && rm -rf "$FUBAR") <"$HOST_KEY_FILE" \
+	    | grep '^fpr:' | cut -d: -f10 )
+    else
+	failure "host key gpg pub file not found."
+    fi
+}
+
+# load the host fingerprint into the fingerprint variable, using the
+# gpg host secret key
+load_fingerprint_secret() {
+    HOST_FINGERPRINT=$( \
+	gpg_host --list-secret-key --with-colons --with-fingerprint \
+	| grep '^fpr:' | cut -d: -f10 )
+}
+
+# fail if host key present
+check_host_key() {
+    [ ! -s "$HOST_KEY_FILE" ] \
+	|| failure "An OpenPGP host key already exists."
 }
 
-# output the index of a user ID on the host key
-# return 1 if user ID not found
+# fail if host key not present
+check_host_no_key() {
+    [ -s "$HOST_KEY_FILE" ] \
+	|| failure "You don't appear to have a Monkeysphere host key on this server.
+Please run 'monkeysphere-host import-key...' first."
+}
+
+# return 0 if user ID was found.
+# return 1 if user ID not found.
 find_host_userid() {
     local userID="$1"
     local tmpuidMatch
-    local line
-
-    # match to only ultimately trusted user IDs
-    tmpuidMatch="u:$(echo $userID | gpg_escape)"
 
-    # find the index of the requsted user ID
-    # NOTE: this is based on circumstantial evidence that the order of
-    # this output is the appropriate index
-    line=$(gpg_host_list | egrep '^(uid|uat):' | cut -f2,10 -d: | \
-	grep -n -x -F "$tmpuidMatch" 2>/dev/null)
-
-    if [ "$line" ] ; then
-	echo ${line%%:*}
-	return 0
-    else
-	return 1
-    fi
-}
+    # match to only "unknown" user IDs (host has no need for ultimate trust)
+    tmpuidMatch="uid:-:$(echo $userID | gpg_escape)"
 
-# function to check for host secret key
-check_host_fail() {
-    [ "$HOST_FINGERPRINT" ] || \
-	failure "You don't appear to have a Monkeysphere host key on this server.  Please run 'monkeysphere-host expert import-key' first."
+    # See whether the requsted user ID is present
+    gpg_host_list | cut -f1,2,10 -d: | \
+	grep -q -x -F "$tmpuidMatch" 2>/dev/null
 }
 
 # show info about the host key
 show_key() {
-    local fingerprintSSH
-
-    # FIXME: should not have to be priviledged user to see this info.
-    # should be taken from publicly accessible key files, instead of
-    # the keyring.
-
-    gpg_host --fingerprint --list-key --list-options show-unusable-uids \
-	"0x${HOST_FINGERPRINT}!" 2>/dev/null
+    local GNUPGHOME
+    local TMPSSH
+    local revokers
+
+    # tmp gpghome dir
+    export GNUPGHOME=$(msmktempdir)
+
+    # trap to remove tmp dir if break
+    trap "rm -rf $GNUPGHOME" EXIT
+
+    # import the host key into the tmp dir
+    gpg --quiet --import <"$HOST_KEY_FILE"
+
+    # create the ssh key
+    TMPSSH="$GNUPGHOME"/ssh_host_key_rsa_pub
+    gpg --export | openpgp2ssh 2>/dev/null >"$TMPSSH"
+
+    # get the gpg fingerprint
+    HOST_FINGERPRINT=$(gpg --quiet --list-keys --with-colons --with-fingerprint \
+	| grep '^fpr:' | cut -d: -f10 )
+
+    # list the host key info
+    # FIXME: make no-show-keyring work so we don't have to do the grep'ing
+    # FIXME: can we show uid validity somehow?
+    gpg --list-keys --fingerprint \
+	--list-options show-unusable-uids 2>/dev/null \
+	| grep -v "^${GNUPGHOME}/pubring.gpg$" \
+	| egrep -v '^-+$'
+
+    # list revokers, if there are any
+    revokers=$(gpg --list-keys --with-colons --fixed-list-mode \
+	| awk -F: '/^rvk:/{ print $10 }' )
+    if [ "$revokers" ] ; then
+	echo "The following keys are allowed to revoke this host key:"
+	for key in $revokers ; do
+	    echo "revoker: $key"
+	done
+	echo
+    fi
 
+    # list the pgp fingerprint
     echo "OpenPGP fingerprint: $HOST_FINGERPRINT"
 
-    if [ -f "${MHDATADIR}/ssh_host_rsa_key.pub" ] ; then
-	fingerprintSSH=$(ssh-keygen -l -f "${MHDATADIR}/ssh_host_rsa_key.pub" | \
-	    awk '{ print $1, $2, $4 }')
-	echo "ssh fingerprint: $fingerprintSSH"
-    else
-	log info "SSH host key not found."
-    fi
+    # list the ssh fingerprint
+    echo -n "ssh fingerprint: "
+    ssh-keygen -l -f "$TMPSSH" | awk '{ print $1, $2, $4 }'
 
-    # FIXME: show expiration date
-    # FIXME: other relevant key parameters?
+    # remove the tmp file
+    trap - EXIT
+    rm -rf "$GNUPGHOME"
 }
 
 ########################################################################
 # MAIN
 ########################################################################
 
-# unset variables that should be defined only in config file
-unset KEYSERVER
-unset MONKEYSPHERE_USER
-
 # load configuration file
-[ -e ${MONKEYSPHERE_HOST_CONFIG:="${SYSCONFIGDIR}/monkeysphere-host.conf"} ] && . "$MONKEYSPHERE_HOST_CONFIG"
+[ -e ${MONKEYSPHERE_HOST_CONFIG:="${SYSCONFIGDIR}/monkeysphere-host.conf"} ] \
+    && . "$MONKEYSPHERE_HOST_CONFIG"
 
 # set empty config variable with ones from the environment, or with
 # defaults
-LOG_LEVEL=${MONKEYSPHERE_LOG_LEVEL:=${LOG_LEVEL:="INFO"}}
-KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="pool.sks-keyservers.net"}}
-AUTHORIZED_USER_IDS=${MONKEYSPHERE_AUTHORIZED_USER_IDS:=${AUTHORIZED_USER_IDS:="%h/.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"}}
+LOG_LEVEL=${MONKEYSPHERE_LOG_LEVEL:=$LOG_LEVEL}
+KEYSERVER=${MONKEYSPHERE_KEYSERVER:=$KEYSERVER}
+CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=$CHECK_KEYSERVER}
+MONKEYSPHERE_USER=${MONKEYSPHERE_MONKEYSPHERE_USER:=$MONKEYSPHERE_USER}
+MONKEYSPHERE_GROUP=$(get_primary_group "$MONKEYSPHERE_USER")
+PROMPT=${MONKEYSPHERE_PROMPT:=$PROMPT}
 
 # other variables
-CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:="true"}
 GNUPGHOME_HOST=${MONKEYSPHERE_GNUPGHOME_HOST:="${MHDATADIR}"}
-
-# host key fingerprint
-HOST_FINGERPRINT=$(fingerprint_host_key)
+LOG_PREFIX=${MONKEYSPHERE_LOG_PREFIX:='ms: '}
 
 # export variables needed in su invocation
 export DATE
-export MODE
 export LOG_LEVEL
-export MONKEYSPHERE_USER
 export KEYSERVER
+export CHECK_KEYSERVER
+export MONKEYSPHERE_USER
+export MONKEYSPHERE_GROUP
+export PROMPT
 export GNUPGHOME_HOST
 export GNUPGHOME
 export HOST_FINGERPRINT
+export LOG_PREFIX
 
 # get subcommand
 COMMAND="$1"
 [ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
 shift
 
-
 case $COMMAND in
+    'import-key'|'i')
+	check_host_key
+	source "${MHSHAREDIR}/import_key"
+	import_key "$@"
+	;;
+
     'show-key'|'show'|'s')
-	check_host_keyring
+	check_host_no_key
 	show_key
 	;;
 
     'set-expire'|'extend-key'|'e')
-	check_host_keyring
+	check_host_no_key
+	load_fingerprint
 	source "${MHSHAREDIR}/set_expire"
 	set_expire "$@"
 	;;
 
     'add-hostname'|'add-name'|'n+')
-	check_host_keyring
+	check_host_no_key
+	load_fingerprint
 	source "${MHSHAREDIR}/add_hostname"
 	add_hostname "$@"
 	;;
 
     'revoke-hostname'|'revoke-name'|'n-')
-	check_host_keyring
+	check_host_no_key
+	load_fingerprint
 	source "${MHSHAREDIR}/revoke_hostname"
 	revoke_hostname "$@"
 	;;
 
-    'add-revoker'|'o')
-	check_host_keyring
+    'add-revoker'|'r+')
+	check_host_no_key
+	load_fingerprint
 	source "${MHSHAREDIR}/add_revoker"
 	add_revoker "$@"
 	;;
 
-    'revoke-key'|'r')
-	check_host_keyring
+    'revoke-key')
+	check_host_no_key
+	load_fingerprint
 	source "${MHSHAREDIR}/revoke_key"
 	revoke_key "$@"
 	;;
 
     'publish-key'|'publish'|'p')
-	check_host_keyring
+	check_host_no_key
+	load_fingerprint
 	source "${MHSHAREDIR}/publish_key"
 	publish_key
 	;;
 
-    'expert')
-	SUBCOMMAND="$1"
-	shift
-	case "$SUBCOMMAND" in
-	    'help'|'h'|'?')
-		cat <<EOF
-usage: $PGRM expert <subcommand> [options] [args]
-
-expert subcommands:
- import-key (i) [NAME[:PORT]]        import existing ssh key to gpg
- gen-key (g) [NAME[:PORT]]           generate gpg key for the host
-   --length (-l) BITS                  key length in bits (2048)
- diagnostics (d)                     monkeysphere host status
-
-EOF
-		;;
-
-	    'import-key'|'i')
-		source "${MHSHAREDIR}/import_key"
-		import_key "$@"
-		;;
-
-	    'gen-key'|'g')
-		source "${MHSHAREDIR}/gen_key"
-		gen_key "$@"
-		;;
-
-	    'diagnostics'|'d')
-		source "${MHSHAREDIR}/diagnostics"
-		diagnostics
-		;;
+    'diagnostics'|'d')
+	source "${MHSHAREDIR}/diagnostics"
+	diagnostics
+	;;
 
-	    *)
-		failure "Unknown expert subcommand: '$COMMAND'
-Type '$PGRM help' for usage."
-		;;
-	esac
+    'update-gpg-pub-file')
+	load_fingerprint_secret
+	update_gpg_pub_file
 	;;
 
     'version'|'v')
-	echo "$VERSION"
+	version
 	;;
 
     '--help'|'help'|'-h'|'h'|'?')
@@ -298,5 +318,3 @@ Type '$PGRM help' for usage."
 Type '$PGRM help' for usage."
         ;;
 esac
-
-exit "$RETURN"