X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fmonkeysphere-server;h=c81c066f167e5a2b7e10db131aede4a7a6798737;hb=948b21702fbeaf1874286bd9b0d7c27c37d55c2a;hp=4fb82653818927915b9aecf5d552968c3c06dcfe;hpb=cb05f332e617e346aa533d6dde02fb11c6148799;p=monkeysphere.git

diff --git a/src/monkeysphere-server b/src/monkeysphere-server
index 4fb8265..c81c066 100755
--- a/src/monkeysphere-server
+++ b/src/monkeysphere-server
@@ -4,6 +4,7 @@
 #
 # The monkeysphere scripts are written by:
 # Jameson Rollins <jrollins@fifthhorseman.net>
+# Daniel Kahn Gillmor <dkg@fifthhorseman.net>
 #
 # They are Copyright 2008, and are all released under the GPL, version 3
 # or later.
@@ -32,7 +33,7 @@ RETURN=0
 ########################################################################
 
 usage() {
-    cat <<EOF
+    cat <<EOF >&2
 usage: $PGRM <subcommand> [options] [args]
 MonkeySphere server admin tool.
 
@@ -40,26 +41,27 @@ subcommands:
  update-users (u) [USER]...          update user authorized_keys files
 
  gen-key (g) [NAME[:PORT]]           generate gpg key for the server
-   -l|--length BITS                    key length in bits (2048)
-   -e|--expire EXPIRE                  date to expire
-   -r|--revoker FINGERPRINT            add a revoker
+   --length (-l) BITS                  key length in bits (2048)
+   --expire (-e) EXPIRE                date to expire
+   --revoker (-r) FINGERPRINT          add a revoker
+ extend-key (e) EXPIRE               extend expiration to EXPIRE
  add-hostname (n+) NAME[:PORT]       add hostname user ID to server key
  revoke-hostname (n-) NAME[:PORT]    revoke hostname user ID
  show-key (s)                        output all server host key information
- fingerprint (f)                     output just the key fingerprint
  publish-key (p)                     publish server host key to keyserver
  diagnostics (d)                     report on server monkeysphere status
 
  add-id-certifier (c+) KEYID         import and tsign a certification key
-   -n|--domain DOMAIN                  limit ID certifications to DOMAIN
-   -t|--trust TRUST                    trust level of certifier (full)
-   -d|--depth DEPTH                    trust depth for certifier (1)
+   --domain (-n) DOMAIN                limit ID certifications to DOMAIN
+   --trust (-t) TRUST                  trust level of certifier (full)
+   --depth (-d) DEPTH                  trust depth for certifier (1)
  remove-id-certifier (c-) KEYID      remove a certification key
  list-id-certifiers (c)              list certification keys
 
  gpg-authentication-cmd CMD          gnupg-authentication command
 
- -h|--help|help (h,?)                this help
+ help (h,?)                          this help
+
 EOF
 }
 
@@ -102,15 +104,28 @@ gpg_authentication() {
 
 # output just key fingerprint
 fingerprint_server_key() {
-    gpg_host --list-secret-keys --fingerprint --with-colons --fixed-list-mode | \
+    gpg_host --list-secret-keys --fingerprint \
+	--with-colons --fixed-list-mode 2> /dev/null | \
 	grep '^fpr:' | head -1 | cut -d: -f10
 }
 
 # output key information
 show_server_key() {
     local fingerprint
+    local tmpkey
+
     fingerprint=$(fingerprint_server_key)
-    gpg_host --fingerprint --list-secret-key "$fingerprint"
+    gpg_authentication "--fingerprint --list-key --list-options show-unusable-uids $fingerprint"
+
+    # dumping to a file named ' ' so that the ssh-keygen output
+    # doesn't claim any potentially bogus hostname(s):
+    tmpkey=$(mktemp -d)
+    gpg_authentication "--export $fingerprint" | openpgp2ssh "$fingerprint" 2>/dev/null > "$tmpkey/ "
+    echo -n "ssh fingerprint: "
+    (cd "$tmpkey" && ssh-keygen -l -f ' ' | awk '{ print $2 }')
+    rm -rf "$tmpkey"
+    echo -n "OpenPGP fingerprint: "
+    echo "$fingerprint"
 }
 
 # update authorized_keys for users
@@ -141,7 +156,7 @@ update_users() {
     for uname in $unames ; do
 	# check all specified users exist
 	if ! getent passwd "$uname" >/dev/null ; then
-	    log "----- unknown user '$uname' -----"
+	    log info "----- unknown user '$uname' -----"
 	    continue
 	fi
 
@@ -157,17 +172,17 @@ update_users() {
 	    fi
 	fi
 
-	log "----- user: $uname -----"
+	log info "----- user: $uname -----"
 
         # exit if the authorized_user_ids file is empty
 	if ! check_key_file_permissions "$uname" "$AUTHORIZED_USER_IDS" ; then
-	    log "Improper permissions on authorized_user_ids file path."
+	    log error "Improper permissions on authorized_user_ids file path."
 	    continue
 	fi
 
 	# check permissions on the authorized_keys file path
 	if ! check_key_file_permissions "$uname" "$RAW_AUTHORIZED_KEYS" ; then
-	    log "Improper permissions on authorized_keys file path path."
+	    log error "Improper permissions on authorized_keys file path path."
 	    continue
 	fi
 
@@ -211,9 +226,8 @@ update_users() {
 
 	# add user-controlled authorized_keys file path if specified
 	if [ "$rawAuthorizedKeys" != '-' -a -s "$rawAuthorizedKeys" ] ; then
-	    log -n "adding raw authorized_keys file... "
+	    log info "adding raw authorized_keys file... "
 	    cat "$rawAuthorizedKeys" >> "$AUTHORIZED_KEYS"
-	    loge "done."
 	fi
 
 	# openssh appears to check the contents of the
@@ -293,25 +307,7 @@ gen_key() {
     fi
 
     # prompt about key expiration if not specified
-    if [ -z "$keyExpire" ] ; then
-	cat <<EOF
-Please specify how long the key should be valid.
-         0 = key does not expire
-      <n>  = key expires in n days
-      <n>w = key expires in n weeks
-      <n>m = key expires in n months
-      <n>y = key expires in n years
-EOF
-	while [ -z "$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 '$keyExpire'."
-    fi
+    keyExpire=$(get_gpg_expiration "$keyExpire")
 
     # set key parameters
     keyParameters=$(cat <<EOF
@@ -349,7 +345,7 @@ EOF
 EOF
 )
 
-    log "generating server key..."
+    log info "generating server key..."
     echo "$keyParameters" | gpg_host --batch --gen-key
 
     # output the server fingerprint
@@ -359,7 +355,7 @@ EOF
     fingerprint=$(fingerprint_server_key)
 
     # export host ownertrust to authentication keyring
-    log "setting ultimate owner trust for server key..."
+    log info "setting ultimate owner trust for server key..."
     echo "${fingerprint}:6:" | gpg_authentication "--import-ownertrust"
 
     # translate the private key to ssh format, and export to a file
@@ -368,7 +364,30 @@ EOF
     (umask 077 && \
 	gpg_host --export-secret-key "$fingerprint" | \
 	openpgp2ssh "$fingerprint" > "${VARLIB}/ssh_host_rsa_key")
-    log "Private SSH host key output to file: ${VARLIB}/ssh_host_rsa_key"
+    log info "Private SSH host key output to file: ${VARLIB}/ssh_host_rsa_key"
+}
+
+# extend the lifetime of a host key:
+extend_key() {
+    local fpr=$(fingerprint_server_key)
+    local extendTo="$1"
+
+    if [ -z "$fpr" ] ; then
+	failure "You don't appear to have a MonkeySphere host key on this server.  Try 'monkeysphere-server gen-key' first."
+    fi
+
+    # get the new expiration date
+    extendTo=$(get_gpg_expiration "$extendTo")
+
+    gpg_host --quiet --command-fd 0 --edit-key "$fpr" <<EOF 
+expire
+$extendTo
+save
+EOF
+
+    echo
+    echo "NOTE: Host key expiration date adjusted, but not yet published."
+    echo "Run '$PGRM publish-key' to publish the new expiration date."
 }
 
 # add hostname user ID to server key
@@ -393,7 +412,7 @@ add_hostname() {
     # 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
-    if line=$(gpg_host --list-keys --with-colons --fixed-list-mode "0x${fingerprint}"\! \
+    if line=$(gpg_host --list-keys --with-colons --fixed-list-mode "0x${fingerprint}!" \
 	| egrep '^(uid|uat):' | cut -f2,10 -d: | grep -n -x -F "$tmpuidMatch") ; then
 	failure "Host userID '$userID' already exists."
     fi
@@ -402,7 +421,7 @@ add_hostname() {
     echo "  $userID"
     read -p "Are you sure you would like to add this user ID? (y/N) " OK; OK=${OK:=N}
     if [ ${OK/y/Y} != 'Y' ] ; then
-	failure "user ID not added."
+	failure "User ID not added."
     fi
 
     # edit-key script command to add user ID
@@ -416,14 +435,17 @@ EOF
 	)
 
     # execute edit-key script
-    if echo "$adduidCommand" | gpg_host --quiet --command-fd 0 --edit-key "0x${fingerprint}"\! ; then
-        # update trust db
-	gpg_host --check-trustdb
+    if echo "$adduidCommand" | \
+	gpg_host --quiet --command-fd 0 --edit-key "0x${fingerprint}!" ; then
+
+        # update the trustdb for the authentication keyring
+	gpg_authentication "--check-trustdb"
 
 	show_server_key
 
-	echo "NOTE: User ID added but key not published."
-	echo "Run '$PGRM publish-key' to publish the key"
+	echo
+	echo "NOTE: User ID added to key, but key not published."
+	echo "Run '$PGRM publish-key' to publish the new user ID."
     else
 	failure "Problem adding user ID."
     fi
@@ -443,6 +465,15 @@ revoke_hostname() {
 	failure "You must specify a hostname to revoke."
     fi
 
+    echo "WARNING: There is a known bug in this function."
+    echo "This function has been known to occasionally revoke the wrong user ID."
+    echo "Please see the following bug report for more information:"
+    echo "http://web.monkeysphere.info/bugs/revoke-hostname-revoking-wrong-userid/"
+    read -p "Are you sure you would like to proceed? (y/N) " OK; OK=${OK:=N}
+    if [ ${OK/y/Y} != 'Y' ] ; then
+	failure "aborting."
+    fi
+
     userID="ssh://${1}"
 
     fingerprint=$(fingerprint_server_key)
@@ -453,18 +484,18 @@ revoke_hostname() {
     # find the index of the requsted user ID
     # NOTE: this is based on circumstantial evidence that the order of
     # this output is the appropriate index
-    if line=$(gpg_host --list-keys --with-colons --fixed-list-mode "0x${fingerprint}"\! \
+    if line=$(gpg_host --list-keys --with-colons --fixed-list-mode "0x${fingerprint}!" \
 	| egrep '^(uid|uat):' | cut -f2,10 -d: | grep -n -x -F "$tmpuidMatch") ; then
 	uidIndex=${line%%:*}
     else
 	failure "No non-revoked user ID '$userID' is found."
     fi
 
-    echo "The following user ID will be revoked from the host key:"
+    echo "The following host key user ID will be revoked:"
     echo "  $userID"
     read -p "Are you sure you would like to revoke this user ID? (y/N) " OK; OK=${OK:=N}
     if [ ${OK/y/Y} != 'Y' ] ; then
-	failure "user ID not revoked."
+	failure "User ID not revoked."
     fi
 
     message="Hostname removed by monkeysphere-server $DATE"
@@ -483,14 +514,17 @@ EOF
 	)	
 
     # execute edit-key script
-    if echo "$revuidCommand" | gpg_host --quiet --command-fd 0 --edit-key "0x${fingerprint}"\! ; then
-        # update trust db
-	gpg_host --check-trustdb
+    if echo "$revuidCommand" | \
+	gpg_host --quiet --command-fd 0 --edit-key "0x${fingerprint}!" ; then
+
+        # update the trustdb for the authentication keyring
+	gpg_authentication "--check-trustdb"
 
 	show_server_key
 
-	echo "NOTE: User ID revoked but key not published."
-	echo "Run '$PGRM publish-key' to publish the key"
+	echo
+	echo "NOTE: User ID revoked, but revocation not published."
+	echo "Run '$PGRM publish-key' to publish the revocation."
     else
 	failure "Problem revoking user ID."
     fi
@@ -507,7 +541,7 @@ publish_server_key() {
     fingerprint=$(fingerprint_server_key)
 
     # publish host key
-    gpg_authentication "--keyserver $KEYSERVER --send-keys $fingerprint"
+    gpg_authentication "--keyserver $KEYSERVER --send-keys '0x${fingerprint}!'"
 }
 
 diagnostics() {
@@ -526,7 +560,7 @@ diagnostics() {
 
     # FIXME: what's the correct, cross-platform answer?
     sshd_config=/etc/ssh/sshd_config
-    seckey=$(fingerprint_server_key)
+    seckey=$(gpg_host --list-secret-keys --fingerprint --with-colons --fixed-list-mode)
     keysfound=$(echo "$seckey" | grep -c ^sec:)
     curdate=$(date +%s)
     # warn when anything is 2 months away from expiration
@@ -548,10 +582,10 @@ diagnostics() {
 	if [ "$expire" ]; then
 	    if (( "$expire"  < "$curdate" )); then
 		echo "! Host key is expired."
-		# FIXME: recommend a way to resolve this other than re-keying?
+		echo " - Recommendation: extend lifetime of key with 'monkeysphere-server extend-key'"
 	    elif (( "$expire" < "$warndate" )); then
 		echo "! Host key expires in less than $warnwindow:" $(date -d "$(( $expire - $curdate )) seconds" +%F)
-		# FIXME: recommend a way to resolve this?
+		echo " - Recommendation: extend lifetime of key with 'monkeysphere-server extend-key'"
 	    fi
 	fi
 
@@ -593,6 +627,7 @@ diagnostics() {
 #   have a way to do that after key generation?)
 
 	# Ensure that the ssh_host_rsa_key file is present and non-empty:
+	echo
 	echo "Checking host SSH key..."
 	if [ ! -s "${VARLIB}/ssh_host_rsa_key" ] ; then
 	    echo "! The host key as prepared for SSH (${VARLIB}/ssh_host_rsa_key) is missing or empty."
@@ -607,7 +642,7 @@ diagnostics() {
 		echo " - Recommendation: add a line to $sshd_config: 'HostKey ${VARLIB}/ssh_host_rsa_key'"
 	    fi
 	    if badhostkeys=$(grep -i '^HostKey' "$sshd_config" | grep -q -v "^HostKey[[:space:]]\+${VARLIB}/ssh_host_rsa_key$") ; then
-		echo "! /etc/sshd_config refers to some non-monkeysphere host keys:"
+		echo "! $sshd_config refers to some non-monkeysphere host keys:"
 		echo "$badhostkeys"
 		echo " - Recommendation: remove the above HostKey lines from $sshd_config"
 	    fi
@@ -623,6 +658,7 @@ diagnostics() {
 
 # FIXME:  make sure that at least one identity certifier exists
 
+    echo
     echo "Checking for MonkeySphere-enabled public-key authentication for users ..."
     # Ensure that User ID authentication is enabled:
     if ! grep -q "^AuthorizedKeysFile[[:space:]]\+${VARLIB}/authorized_keys/%u$" "$sshd_config"; then
@@ -630,7 +666,7 @@ diagnostics() {
 	echo " - Recommendation: add a line to $sshd_config: 'AuthorizedKeysFile ${VARLIB}/authorized_keys/%u'"
     fi
     if badauthorizedkeys=$(grep -i '^AuthorizedKeysFile' "$sshd_config" | grep -q -v "^AuthorizedKeysFile[[:space:]]\+${VARLIB}/authorized_keys/%u$") ; then
-	echo "! /etc/sshd_config refers to non-monkeysphere authorized_keys files:"
+	echo "! $sshd_config refers to non-monkeysphere authorized_keys files:"
 	echo "$badauthorizedkeys"
 	echo " - Recommendation: remove the above AuthorizedKeysFile lines from $sshd_config"
     fi
@@ -692,30 +728,35 @@ add_certifier() {
     export keyID
 
     # get the key from the key server
-    gpg_authentication "--keyserver $KEYSERVER --recv-key '$keyID'"
+    gpg_authentication "--keyserver $KEYSERVER --recv-key '0x${keyID}!'"
 
     # get the full fingerprint of a key ID
-    fingerprint=$(gpg_authentication "--list-key --with-colons --with-fingerprint $keyID" | \
+    fingerprint=$(gpg_authentication "--list-key --with-colons --with-fingerprint 0x${keyID}!" | \
 	grep '^fpr:' | grep "$keyID" | cut -d: -f10)
 
+    if [ -z "$fingerprint" ] ; then
+	failure "Key '$keyID' not found."
+    fi
+
+    echo
     echo "key found:"
-    gpg_authentication "--fingerprint $fingerprint"
+    gpg_authentication "--fingerprint 0x${fingerprint}!"
 
-    echo "Are you sure you want to add this key as a certifier of"
-    read -p "users on this system? (y/N) " OK; OK=${OK:-N}
+    echo "Are you sure you want to add the above key as a"
+    read -p "certifier of users on this system? (y/N) " OK; OK=${OK:-N}
     if [ "${OK/y/Y}" != 'Y' ] ; then
-	failure "aborting."
+	failure "Identity certifier not added."
     fi
 
     # export the key to the host keyring
-    gpg_authentication "--export $keyID" | gpg_host --import
+    gpg_authentication "--export 0x${fingerprint}!" | gpg_host --import
 
     if [ "$trust" == marginal ]; then
 	trustval=1
     elif [ "$trust" == full ]; then
 	trustval=2
     else
-	failure "trust value requested ('$trust') was unclear (only 'marginal' or 'full' are supported)"
+	failure "Trust value requested ('$trust') was unclear (only 'marginal' or 'full' are supported)."
     fi
 
     # ltsign command
@@ -732,10 +773,17 @@ EOF
 	)
 
     # ltsign the key
-    echo "$ltsignCommand" | gpg_host --quiet --command-fd 0 --edit-key "$fingerprint"
+    if echo "$ltsignCommand" | \
+	gpg_host --quiet --command-fd 0 --edit-key "0x${fingerprint}!" ; then
 
-    # update the trustdb for the authentication keyring
-    gpg_authentication "--check-trustdb"
+        # update the trustdb for the authentication keyring
+	gpg_authentication "--check-trustdb"
+
+	echo
+	echo "Identity certifier added."
+    else
+	failure "Problem adding identify certifier."
+    fi
 }
 
 # delete a certifiers key from the host keyring
@@ -748,16 +796,43 @@ remove_certifier() {
 	failure "You must specify the key ID of a key to remove."
     fi
 
-    # delete the requested key (with prompting)
-    gpg_host --delete-key "$keyID"
+    if gpg_authentication "--no-options --list-options show-uid-validity --keyring ${GNUPGHOME_AUTHENTICATION}/pubring.gpg --list-key 0x${keyID}!" ; then
+	read -p "Really remove above listed identity certifier? (y/N) " OK; OK=${OK:-N}
+	if [ "${OK/y/Y}" != 'Y' ] ; then
+	    failure "Identity certifier not removed."
+	fi
+    else
+	failure
+    fi
+
+    # delete the requested key
+    if gpg_authentication "--delete-key --batch --yes 0x${keyID}!" ; then
+	# delete key from host keyring as well
+	gpg_host --delete-key --batch --yes "0x${keyID}!"
 
-    # update the trustdb for the authentication keyring
-    gpg_authentication "--check-trustdb"
+        # update the trustdb for the authentication keyring
+	gpg_authentication "--check-trustdb"
+
+	echo
+	echo "Identity certifier removed."
+    else
+	failure "Problem removing identity certifier."
+    fi
 }
 
 # list the host certifiers
 list_certifiers() {
-    gpg_host --list-keys
+    local keys
+    local key
+
+    # find trusted keys in authentication keychain
+    keys=$(gpg_authentication "--no-options --list-options show-uid-validity --keyring ${GNUPGHOME_AUTHENTICATION}/pubring.gpg --list-keys --with-colons --fingerprint" | \
+        grep ^pub: | cut -d: -f2,5 | egrep '^(u|f):' | cut -d: -f2)
+
+    # output keys
+    for key in $keys ; do
+        gpg_authentication "--no-options --list-options show-uid-validity --keyring ${GNUPGHOME_AUTHENTICATION}/pubring.gpg --list-key --fingerprint $key"
+    done
 }
 
 # issue command to gpg-authentication keyring
@@ -780,6 +855,7 @@ unset MONKEYSPHERE_USER
 
 # set empty config variable with ones from the environment, or with
 # defaults
+LOG_LEVEL=${MONKEYSPHERE_LOG_LEVEL:=${LOG_LEVEL:="info"}}
 KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="subkeys.pgp.net"}}
 AUTHORIZED_USER_IDS=${MONKEYSPHERE_AUTHORIZED_USER_IDS:=${AUTHORIZED_USER_IDS:="%h/.config/monkeysphere/authorized_user_ids"}}
 RAW_AUTHORIZED_KEYS=${MONKEYSPHERE_RAW_AUTHORIZED_KEYS:=${RAW_AUTHORIZED_KEYS:="%h/.ssh/authorized_keys"}}
@@ -795,6 +871,7 @@ GNUPGHOME_AUTHENTICATION=${MONKEYSPHERE_GNUPGHOME_AUTHENTICATION:="${VARLIB}/gnu
 export DATE
 export MODE
 export MONKEYSPHERE_USER
+export LOG_LEVEL
 export KEYSERVER
 export CHECK_KEYSERVER
 export REQUIRED_USER_KEY_CAPABILITY
@@ -816,6 +893,10 @@ case $COMMAND in
 	gen_key "$@"
 	;;
 
+    'extend-key'|'e')
+	extend_key "$@"
+	;;
+
     'add-hostname'|'add-name'|'n+')
 	add_hostname "$@"
 	;;
@@ -828,10 +909,6 @@ case $COMMAND in
 	show_server_key
 	;;
 
-    'show-fingerprint'|'fingerprint'|'f')
-	fingerprint_server_key
-	;;
-
     'publish-key'|'publish'|'p')
 	publish_server_key
 	;;