X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fmonkeysphere-server;h=0a2f04b00bcb9624b7b4fdfba23bfb197d339bf2;hb=dda1c93bc94daa24bf7b0f5671f8a222c0089efd;hp=68c4b243ce5e50b8541f0ece0e7498c0621a4570;hpb=de3031b28bbccd2cb47a9029e69064330ee137e8;p=monkeysphere.git diff --git a/src/monkeysphere-server b/src/monkeysphere-server index 68c4b24..0a2f04b 100755 --- a/src/monkeysphere-server +++ b/src/monkeysphere-server @@ -37,28 +37,26 @@ usage: $PGRM [options] [args] MonkeySphere server admin tool. subcommands: - update-users (u) [USER]... update user authorized_keys files - - gen-key (g) [HOSTNAME] 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 - show-fingerprint (f) show server's host key fingerprint - publish-key (p) publish server's host key to keyserver - - add-identity-certifier (a) KEYID import and tsign a certification key - -n|--domain DOMAIN domain of certifier () - -t|--trust TRUST trust level of certifier (2) - -d|--depth DEPTH trust depth for certifier (1) - remove-identity-certifier (r) KEYID remove a certification key - list-identity-certifiers (l) list certification keys - - gpg-authentication-cmd execute a gpg command to the - authentication keyring as the - monkeysphere user - - help (h,?) this help - + update-users (u) [USER]... update user authorized_keys files + + gen-key (g) [HOSTNAME] 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 + show-fingerprint (f) show server's host key fingerprint + publish-key (p) publish server's host key to keyserver + diagnostics (d) report on the server's monkeysphere status + + add-identity-certifier (a) KEYID import and tsign a certification key + -n|--domain DOMAIN limit ID certifications to IDs in DOMAIN + -t|--trust TRUST trust level of certifier (full) + -d|--depth DEPTH trust depth for certifier (1) + remove-identity-certifier (r) KEYID remove a certification key + list-identity-certifiers (l) list certification keys + + gpg-authentication-cmd CMD gnupg-authentication command + + help (h,?) this help EOF } @@ -145,13 +143,15 @@ update_users() { log "----- user: $uname -----" + # exit if the authorized_user_ids file is empty if ! check_key_file_permissions "$uname" "$AUTHORIZED_USER_IDS" ; then - log "Improper permissions on authorized_user_ids file." + log "Improper permissions on authorized_user_ids file path." continue fi + # check permissions on the authorized_keys file path if ! check_key_file_permissions "$uname" "$RAW_AUTHORIZED_KEYS" ; then - log "Improper permissions on authorized_keys file." + log "Improper permissions on authorized_keys file path path." continue fi @@ -208,8 +208,7 @@ update_users() { chgrp $(getent passwd "$uname" | cut -f4 -d:) "$AUTHORIZED_KEYS" chmod g+r "$AUTHORIZED_KEYS" - # if the resulting authorized_keys file is not empty, move - # it into place + # move the resulting authorized_keys file into place mv -f "$AUTHORIZED_KEYS" "${VARLIB}/authorized_keys/${uname}" # destroy temporary directory @@ -237,7 +236,7 @@ gen_key() { revoker= # get options - TEMP=$(getopt -o l:e:r: -l length:,expire:,revoker: -n "$PGRM" -- "$@") + TEMP=$(getopt -o e:l:r -l expire:,length:,revoker: -n "$PGRM" -- "$@") if [ $? != 0 ] ; then exit 1 @@ -344,6 +343,10 @@ EOF fingerprint=$(gpg_host --list-key --with-colons --with-fingerprint "=${userID}" | \ grep '^fpr:' | head -1 | cut -d: -f10) + # export host ownertrust to authentication keyring + log "setting ultimate owner trust for server key..." + echo "${fingerprint}:6:" | gpg_authentication "--import-ownertrust" + # translate the private key to ssh format, and export to a file # for sshs usage. # NOTE: assumes that the primary key is the proper key to use @@ -360,7 +363,7 @@ fingerprint_server_key() { # publish server key to keyserver publish_server_key() { - read -p "really publish key to $KEYSERVER? (y/N) " OK; OK=${OK:=N} + read -p "Really publish key to $KEYSERVER? (y/N) " OK; OK=${OK:=N} if [ ${OK/y/Y} != 'Y' ] ; then failure "aborting." fi @@ -369,8 +372,123 @@ publish_server_key() { # FIXME: need to figure out better way to identify host key # dummy command so as not to publish fakes keys during testing # eventually: - #gpg_authentication "--keyring $GNUPGHOME_HOST/pubring.gpg --keyserver $KEYSERVER --send-keys $(hostname -f)" - failure "NOT PUBLISHED (to avoid permanent publication errors during monkeysphere development)." + #gpg_authentication "--keyserver $KEYSERVER --send-keys $(hostname -f)" + echo "NOT PUBLISHED (to avoid permanent publication errors during monkeysphere development)." + echo "The following command should publish the key:" + echo "monkeysphere-server gpg-authentication-cmd '--keyserver $KEYSERVER --send-keys $(hostname -f)'" + exit 255 +} + +diagnostics() { +# * check on the status and validity of the key and public certificates + local seckey + local keysfound + local curdate + local warnwindow + local warndate + local create + local expire + local uid + local fingerprint + local badhostkeys + + seckey=$(gpg_host --list-secret-keys --fingerprint --with-colons --fixed-list-mode) + keysfound=$(echo "$seckey" | grep -c ^sec:) + curdate=$(date +%s) + # warn when anything is 2 months away from expiration + warnwindow='2 months' + warndate=$(date +%s -d "$warnwindow") + + echo "Checking host GPG key..." + if (( "$keysfound" < 1 )); then + echo "! No host key found." + echo " - Recommendation: run 'monkeysphere-server gen-key'" + elif (( "$keysfound" > 1 )); then + echo "! More than one host key found?" + # FIXME: recommend a way to resolve this + else + create=$(echo "$seckey" | grep ^sec: | cut -f6 -d:) + expire=$(echo "$seckey" | grep ^sec: | cut -f7 -d:) + fingerprint=$(echo "$seckey" | grep ^fpr: | head -n1 | cut -f10 -d:) + # check for key expiration: + if [ "$expire" ]; then + if (( "$expire" < "$curdate" )); then + echo "! Host key is expired." + # FIXME: recommend a way to resolve this other than re-keying? + elif (( "$expire" < "$warndate" )); then + echo "! Host key expires in less than $warnwindow:" $(date -d "$(( $expire - $curdate )) seconds" +%F) + # FIXME: recommend a way to resolve this? + fi + fi + + # and weirdnesses: + if [ "$create" ] && (( "$create" > "$curdate" )); then + echo "! Host key was created in the future(?!). Is your clock correct?" + echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?" + fi + + # check for UserID expiration: + echo "$seckey" | grep ^uid: | cut -d: -f6,7,10 | \ + while IFS=: read create expire uid ; do + # FIXME: should we be doing any checking on the form + # of the User ID? Should we be unmangling it somehow? + + if [ "$create" ] && (( "$create" > "$curdate" )); then + echo "! User ID '$uid' was created in the future(?!). Is your clock correct?" + echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?" + fi + if [ "$expire" ] ; then + if (( "$expire" < "$curdate" )); then + echo "! User ID '$uid' is expired." + # FIXME: recommend a way to resolve this + elif (( "$expire" < "$warndate" )); then + echo "! User ID '$uid' expires in less than $warnwindow:" $(date -d "$(( $expire - $curdate )) seconds" +%F) + # FIXME: recommend a way to resolve this + fi + fi + done + +# FIXME: verify that the host key is properly published to the +# keyservers (do this with the non-privileged user) + +# FIXME: check that there are valid, non-expired certifying signatures +# attached to the host key after fetching from the public keyserver +# (do this with the non-privileged user as well) + +# FIXME: propose adding a revoker to the host key if none exist (do we +# have a way to do that after key generation?) + + # Ensure that the ssh_host_rsa_key file is present and non-empty: + echo "Checking host SSH key..." + if [ ! -s "${VARLIB}/ssh_host_rsa_key" ] ; then + echo "! The host key as prepared for SSH (${VARLIB}/ssh_host_rsa_key) is missing or empty." + else + if [ $(stat -c '%a' "${VARLIB}/ssh_host_rsa_key") != 600 ] ; then + echo "! Permissions seem wrong for ${VARLIB}/ssh_host_rsa_key -- should be 0600." + fi + + # propose changes needed for sshd_config (if any) + if ! grep -q "^HostKey ${VARLIB}/ssh_host_rsa_key$" /etc/ssh/sshd_config; then + echo "! /etc/ssh/sshd_config does not point to the monkeysphere host key (${VARLIB}/ssh_host_rsa_key)." + echo " - Recommendation: add a line to /etc/ssh/sshd_config: 'HostKey ${VARLIB}/ssh_host_rsa_key'" + fi + if badhostkeys=$(grep '^HostKey' | grep -q -v "^HostKey ${VARLIB}/ssh_host_rsa_key$") ; then + echo "! /etc/sshd_config refers to some non-monkeysphere host keys:" + echo "$badhostkeys" + echo "- Recommendation: remove the above HostKey lines from /etc/ssh/sshd_config" + fi + fi + fi + +# FIXME: look at the ownership/privileges of the various keyrings, +# directories housing them, etc (what should those values be? can +# we make them as minimal as possible?) + +# FIXME: look to see that the ownertrust rules are set properly on the +# authentication keyring + +# FIXME: make sure that at least one identity certifier exists + } # retrieve key from web of trust, import it into the host keyring, and @@ -382,10 +500,11 @@ add_certifier() { local keyID local fingerprint local ltsignCommand + local trustval # set default values for trust depth and domain domain= - trust=2 + trust=full depth=1 # get options @@ -422,11 +541,11 @@ add_certifier() { done keyID="$1" + if [ -z "$keyID" ] ; then + failure "You must specify the key ID of a key to add." + fi export keyID - # export host ownertrust to authentication keyring - gpg_host --export-ownertrust | gpg_authentication "--import-ownertrust" - # get the key from the key server gpg_authentication "--keyserver $KEYSERVER --recv-key '$keyID'" @@ -437,7 +556,8 @@ add_certifier() { echo "key found:" gpg_authentication "--fingerprint $fingerprint" - read -p "Are you sure you want to add this key as a certifier of users on this system? (y/N) " OK; OK=${OK:-N} + echo "Are you sure you want to add this key as a certifier of" + read -p "users on this system? (y/N) " OK; OK=${OK:-N} if [ "${OK/y/Y}" != 'Y' ] ; then failure "aborting." fi @@ -445,18 +565,26 @@ add_certifier() { # export the key to the host keyring gpg_authentication "--export $keyID" | gpg_host --import + if [ "$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)" + fi + # ltsign command # NOTE: *all* user IDs will be ltsigned ltsignCommand=$(cat <