diff options
| -rw-r--r-- | etc/authentication/config (renamed from etc/monkeysphere-server.conf) | 8 | ||||
| -rw-r--r-- | etc/authentication/gpg.conf (renamed from etc/gnupg-authentication.conf) | 4 | ||||
| -rw-r--r-- | etc/host/config | 11 | ||||
| -rw-r--r-- | etc/host/gpg.conf (renamed from etc/gnupg-host.conf) | 0 | ||||
| -rwxr-xr-x | src/monkeysphere-authentication | 729 | ||||
| -rwxr-xr-x | src/monkeysphere-host (renamed from src/monkeysphere-server) | 434 | ||||
| -rwxr-xr-x | src/subcommands/m/ssh-proxycommand (renamed from src/monkeysphere-ssh-proxycommand) | 0 |
7 files changed, 780 insertions, 406 deletions
diff --git a/etc/monkeysphere-server.conf b/etc/authentication/config index 8b9ffa4..c9b57d2 100644 --- a/etc/monkeysphere-server.conf +++ b/etc/authentication/config @@ -1,4 +1,4 @@ -# Monkeysphere server configuration file. +# Monkeysphere authentication configuration file. # This is an sh-style shell configuration file. Variable names should # be separated from their assignments by a single '=' and no spaces. @@ -6,13 +6,13 @@ # prefaced by "MONKEYSPHERE_" will take precedence over the values # specified here. -# User who controls the monkeysphere authentication keyring. -#MONKEYSPHERE_USER=monkeysphere - # Log level. Can be SILENT, ERROR, INFO, VERBOSE, DEBUG, in # increasing order of verbosity. #LOG_LEVEL=INFO +# User who controls the monkeysphere 'sphere' keyring. +#MONKEYSPHERE_USER=monkeysphere + # Path to authorized_user_ids file to process to create # authorized_keys file. '%h' will be replaced by the home directory # of the user, and '%u' will be replaced by the username of the user. diff --git a/etc/gnupg-authentication.conf b/etc/authentication/gpg.conf index 7e5620b..77b96e1 100644 --- a/etc/gnupg-authentication.conf +++ b/etc/authentication/gpg.conf @@ -4,8 +4,8 @@ # It is highly recommended that you # DO NOT MODIFY # these variables. -primary-keyring /var/lib/monkeysphere/gnupg-authentication/pubring.gpg -keyring /var/lib/monkeysphere/gnupg-host/pubring.gpg +primary-keyring /var/lib/monkeysphere/authentication/sphere/pubring.gpg +keyring /var/lib/monkeysphere/authentication/core/pubring.gpg # PGP keyserver to use for PGP queries. keyserver hkp://pool.sks-keyservers.net diff --git a/etc/host/config b/etc/host/config new file mode 100644 index 0000000..293cbe0 --- /dev/null +++ b/etc/host/config @@ -0,0 +1,11 @@ +# Monkeysphere host configuration file. + +# This is an sh-style shell configuration file. Variable names should +# be separated from their assignments by a single '=' and no spaces. +# Environment variables with the same names as these variables but +# prefaced by "MONKEYSPHERE_" will take precedence over the values +# specified here. + +# Log level. Can be SILENT, ERROR, INFO, VERBOSE, DEBUG, in +# increasing order of verbosity. +#LOG_LEVEL=INFO diff --git a/etc/gnupg-host.conf b/etc/host/gpg.conf index 66c668b..66c668b 100644 --- a/etc/gnupg-host.conf +++ b/etc/host/gpg.conf diff --git a/src/monkeysphere-authentication b/src/monkeysphere-authentication new file mode 100755 index 0000000..71ca91f --- /dev/null +++ b/src/monkeysphere-authentication @@ -0,0 +1,729 @@ +#!/usr/bin/env bash + +# monkeysphere-authentication: Monkeysphere authentication admin tool +# +# The monkeysphere scripts are written by: +# Jameson Rollins <jrollins@fifthhorseman.net> +# Jamie McClelland <jm@mayfirst.org> +# Daniel Kahn Gillmor <dkg@fifthhorseman.net> +# +# They are Copyright 2008, and are all released under the GPL, version 3 +# or later. + +######################################################################## +PGRM=$(basename $0) + +SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"} +export SYSSHAREDIR +. "${SYSSHAREDIR}/common" || exit 1 + +SYSDATADIR=${MONKEYSPHERE_SYSDATADIR:-"/var/lib/monkeysphere/authentication"} +export SYSDATADIR + +# monkeysphere temp directory, in sysdatadir to enable atomic moves of +# authorized_keys files +MSTMPDIR="${SYSDATADIR}/tmp" +export MSTMPDIR + +# UTC date in ISO 8601 format if needed +DATE=$(date -u '+%FT%T') + +# unset some environment variables that could screw things up +unset GREP_OPTIONS + +# default return code +RETURN=0 + +######################################################################## +# FUNCTIONS +######################################################################## + +usage() { + cat <<EOF >&2 +usage: $PGRM <subcommand> [options] [args] +Monkeysphere authentication admin tool. + +subcommands: + update-users (u) [USER]... update user authorized_keys files + add-id-certifier (c+) KEYID import and tsign a certification key + --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 + + expert + diagnostics (d) monkeysphere authentication status + gpg-cmd CMD execute gpg command + + version (v) show version number + help (h,?) this help + +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 "$@" + fi +} + +# function to interact with the host gnupg keyring +gpg_host() { + local returnCode + + GNUPGHOME="$GNUPGHOME_HOST" + export GNUPGHOME + + # NOTE: we supress this warning because we need the monkeysphere + # user to be able to read the host pubring. we realize this might + # be problematic, but it's the simplest solution, without too much + # loss of security. + gpg --no-permission-warning "$@" + returnCode="$?" + + # always reset the permissions on the host pubring so that the + # monkeysphere user can read the trust signatures + chgrp "$MONKEYSPHERE_USER" "${GNUPGHOME_HOST}/pubring.gpg" + chmod g+r "${GNUPGHOME_HOST}/pubring.gpg" + + return "$returnCode" +} + +# function to interact with the authentication gnupg keyring +# FIXME: this function requires basically accepts only a single +# argument because of problems with quote expansion. this needs to be +# fixed/improved. +gpg_authentication() { + GNUPGHOME="$GNUPGHOME_AUTHENTICATION" + export GNUPGHOME + + su_monkeysphere_user "gpg $@" +} + +# check if user is root +is_root() { + [ $(id -u 2>/dev/null) = '0' ] +} + +# check that user is root, for functions that require root access +check_user() { + is_root || failure "You must be root to run this command." +} + +# output just key fingerprint +fingerprint_server_key() { + # set the pipefail option so functions fails if can't read sec key + set -o pipefail + + gpg_host --list-secret-keys --fingerprint \ + --with-colons --fixed-list-mode 2> /dev/null | \ + grep '^fpr:' | head -1 | cut -d: -f10 2>/dev/null +} + +# function to check for host secret key +check_host_keyring() { + fingerprint_server_key >/dev/null \ + || failure "You don't appear to have a Monkeysphere host key on this server. Please run 'monkeysphere-server gen-key' first." +} + +# update authorized_keys for users +update_users() { + if [ "$1" ] ; then + # get users from command line + unames="$@" + else + # or just look at all users if none specified + unames=$(getent passwd | cut -d: -f1) + fi + + RETCODE=0 + + # set mode + MODE="authorized_keys" + + # set gnupg home + GNUPGHOME="$GNUPGHOME_AUTHENTICATION" + + # check to see if the gpg trust database has been initialized + if [ ! -s "${GNUPGHOME}/trustdb.gpg" ] ; then + failure "GNUPG trust database uninitialized. Please see MONKEYSPHERE-SERVER(8)." + fi + + # make sure the authorized_keys directory exists + mkdir -p "${SYSDATADIR}/authorized_keys" + + # loop over users + for uname in $unames ; do + # check all specified users exist + if ! id "$uname" >/dev/null ; then + log error "----- unknown user '$uname' -----" + continue + fi + + log verbose "----- user: $uname -----" + + # make temporary directory + TMPLOC=$(mktemp -d ${MSTMPDIR}/tmp.XXXXXXXXXX) || failure "Could not create temporary directory!" + + # trap to delete temporary directory on exit + trap "rm -rf $TMPLOC" EXIT + + # create temporary authorized_user_ids file + TMP_AUTHORIZED_USER_IDS="${TMPLOC}/authorized_user_ids" + touch "$TMP_AUTHORIZED_USER_IDS" + + # create temporary authorized_keys file + AUTHORIZED_KEYS="${TMPLOC}/authorized_keys" + touch "$AUTHORIZED_KEYS" + + # set restrictive permissions on the temporary files + # FIXME: is there a better way to do this? + chmod 0700 "$TMPLOC" + chmod 0600 "$AUTHORIZED_KEYS" + chmod 0600 "$TMP_AUTHORIZED_USER_IDS" + chown -R "$MONKEYSPHERE_USER" "$TMPLOC" + + # process authorized_user_ids file + log debug "checking for authorized_user_ids..." + # translating ssh-style path variables + authorizedUserIDs=$(translate_ssh_variables "$uname" "$AUTHORIZED_USER_IDS") + if [ -s "$authorizedUserIDs" ] ; then + # check permissions on the authorized_user_ids file path + if check_key_file_permissions "$uname" "$authorizedUserIDs" ; then + # copy user authorized_user_ids file to temporary + # location + cat "$authorizedUserIDs" > "$TMP_AUTHORIZED_USER_IDS" + + # export needed variables + export AUTHORIZED_KEYS + export TMP_AUTHORIZED_USER_IDS + + # process authorized_user_ids file, as monkeysphere + # user + su_monkeysphere_user \ + ". ${SYSSHAREDIR}/common; process_authorized_user_ids $TMP_AUTHORIZED_USER_IDS" + RETURN="$?" + else + log debug "not processing authorized_user_ids." + fi + else + log debug "empty or absent authorized_user_ids file." + fi + + # add user-controlled authorized_keys file if specified + # translate ssh-style path variables + rawAuthorizedKeys=$(translate_ssh_variables "$uname" "$RAW_AUTHORIZED_KEYS") + if [ "$rawAuthorizedKeys" != 'none' ] ; then + log debug "checking for raw authorized_keys..." + if [ -s "$rawAuthorizedKeys" ] ; then + # check permissions on the authorized_keys file path + if check_key_file_permissions "$uname" "$rawAuthorizedKeys" ; then + log verbose "adding raw authorized_keys file... " + cat "$rawAuthorizedKeys" >> "$AUTHORIZED_KEYS" + else + log debug "not adding raw authorized_keys file." + fi + else + log debug "empty or absent authorized_keys file." + fi + fi + + # move the new authorized_keys file into place + if [ -s "$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. + + # but in general, we don't want the user tampering with + # this file directly, so we'll adopt this approach: Own + # the file by the monkeysphere-server invoker (usually + # root, but should be the same uid that sshd is launched + # as); change the group of the file so that members of the + # user's group can read it. + + # FIXME: is there a better way to do this? + chown $(whoami) "$AUTHORIZED_KEYS" && \ + chgrp $(id -g "$uname") "$AUTHORIZED_KEYS" && \ + chmod g+r "$AUTHORIZED_KEYS" && \ + mv -f "$AUTHORIZED_KEYS" "${SYSDATADIR}/authorized_keys/${uname}" || \ + { + log error "Failed to install authorized_keys for '$uname'!" + rm -f "${SYSDATADIR}/authorized_keys/${uname}" + # indicate that there has been a failure: + RETURN=1 + } + else + rm -f "${SYSDATADIR}/authorized_keys/${uname}" + fi + + # unset the trap + trap - EXIT + + # destroy temporary directory + rm -rf "$TMPLOC" + done +} + +diagnostics() { +# * check on the status and validity of the key and public certificates + local seckey + local keysfound + local curdate + local warnwindow + local warndate + local create + local expire + local uid + local fingerprint + local badhostkeys + local sshd_config + local problemsfound=0 + + # FIXME: what's the correct, cross-platform answer? + sshd_config=/etc/ssh/sshd_config + seckey=$(gpg_host --list-secret-keys --fingerprint --with-colons --fixed-list-mode) + keysfound=$(echo "$seckey" | grep -c ^sec:) + curdate=$(date +%s) + # warn when anything is 2 months away from expiration + warnwindow='2 months' + warndate=$(advance_date $warnwindow +%s) + + if ! id monkeysphere >/dev/null ; then + echo "! No monkeysphere user found! Please create a monkeysphere system user with bash as its shell." + problemsfound=$(($problemsfound+1)) + fi + + if ! [ -d "$SYSDATADIR" ] ; then + echo "! no $SYSDATADIR directory found. Please create it." + problemsfound=$(($problemsfound+1)) + fi + + echo "Checking host GPG key..." + if (( "$keysfound" < 1 )); then + echo "! No host key found." + echo " - Recommendation: run 'monkeysphere-server gen-key'" + problemsfound=$(($problemsfound+1)) + elif (( "$keysfound" > 1 )); then + echo "! More than one host key found?" + # FIXME: recommend a way to resolve this + problemsfound=$(($problemsfound+1)) + else + create=$(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." + echo " - Recommendation: extend lifetime of key with 'monkeysphere-server extend-key'" + problemsfound=$(($problemsfound+1)) + elif (( "$expire" < "$warndate" )); then + echo "! Host key expires in less than $warnwindow:" $(advance_date $(( $expire - $curdate )) seconds +%F) + echo " - Recommendation: extend lifetime of key with 'monkeysphere-server extend-key'" + problemsfound=$(($problemsfound+1)) + fi + fi + + # and weirdnesses: + if [ "$create" ] && (( "$create" > "$curdate" )); then + echo "! Host key was created in the future(?!). Is your clock correct?" + echo " - Recommendation: Check clock ($(date +%F_%T)); use NTP?" + problemsfound=$(($problemsfound+1)) + fi + + # check for UserID expiration: + echo "$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 ($(date +%F_%T)); use NTP?" + problemsfound=$(($problemsfound+1)) + fi + if [ "$expire" ] ; then + if (( "$expire" < "$curdate" )); then + echo "! User ID '$uid' is expired." + # FIXME: recommend a way to resolve this + problemsfound=$(($problemsfound+1)) + elif (( "$expire" < "$warndate" )); then + echo "! User ID '$uid' expires in less than $warnwindow:" $(advance_date $(( $expire - $curdate )) seconds +%F) + # FIXME: recommend a way to resolve this + problemsfound=$(($problemsfound+1)) + fi + fi + done + +# FIXME: verify that the host key is properly published to the +# keyservers (do this with the non-privileged user) + +# FIXME: check that there are valid, non-expired certifying signatures +# attached to the host key after fetching from the public keyserver +# (do this with the non-privileged user as well) + +# FIXME: propose adding a revoker to the host key if none exist (do we +# have a way to do that after key generation?) + + # Ensure that the ssh_host_rsa_key file is present and non-empty: + echo + echo "Checking host SSH key..." + if [ ! -s "${SYSDATADIR}/ssh_host_rsa_key" ] ; then + echo "! The host key as prepared for SSH (${SYSDATADIR}/ssh_host_rsa_key) is missing or empty." + problemsfound=$(($problemsfound+1)) + else + if [ $(ls -l "${SYSDATADIR}/ssh_host_rsa_key" | cut -f1 -d\ ) != '-rw-------' ] ; then + echo "! Permissions seem wrong for ${SYSDATADIR}/ssh_host_rsa_key -- should be 0600." + problemsfound=$(($problemsfound+1)) + fi + + # propose changes needed for sshd_config (if any) + if ! grep -q "^HostKey[[:space:]]\+${SYSDATADIR}/ssh_host_rsa_key$" "$sshd_config"; then + echo "! $sshd_config does not point to the monkeysphere host key (${SYSDATADIR}/ssh_host_rsa_key)." + echo " - Recommendation: add a line to $sshd_config: 'HostKey ${SYSDATADIR}/ssh_host_rsa_key'" + problemsfound=$(($problemsfound+1)) + fi + if badhostkeys=$(grep -i '^HostKey' "$sshd_config" | grep -v "^HostKey[[:space:]]\+${SYSDATADIR}/ssh_host_rsa_key$") ; then + echo "! $sshd_config refers to some non-monkeysphere host keys:" + echo "$badhostkeys" + echo " - Recommendation: remove the above HostKey lines from $sshd_config" + problemsfound=$(($problemsfound+1)) + fi + + # FIXME: test (with ssh-keyscan?) that the running ssh + # daemon is actually offering the monkeysphere host key. + + fi + fi + +# FIXME: look at the ownership/privileges of the various keyrings, +# directories housing them, etc (what should those values be? can +# we make them as minimal as possible?) + +# FIXME: look to see that the ownertrust rules are set properly on the +# authentication keyring + +# FIXME: make sure that at least one identity certifier exists + +# FIXME: look at the timestamps on the monkeysphere-generated +# authorized_keys files -- warn if they seem out-of-date. + +# FIXME: check for a cronjob that updates monkeysphere-generated +# authorized_keys? + + echo + echo "Checking for MonkeySphere-enabled public-key authentication for users ..." + # Ensure that User ID authentication is enabled: + if ! grep -q "^AuthorizedKeysFile[[:space:]]\+${SYSDATADIR}/authorized_keys/%u$" "$sshd_config"; then + echo "! $sshd_config does not point to monkeysphere authorized keys." + echo " - Recommendation: add a line to $sshd_config: 'AuthorizedKeysFile ${SYSDATADIR}/authorized_keys/%u'" + problemsfound=$(($problemsfound+1)) + fi + if badauthorizedkeys=$(grep -i '^AuthorizedKeysFile' "$sshd_config" | grep -v "^AuthorizedKeysFile[[:space:]]\+${SYSDATADIR}/authorized_keys/%u$") ; then + echo "! $sshd_config refers to non-monkeysphere authorized_keys files:" + echo "$badauthorizedkeys" + echo " - Recommendation: remove the above AuthorizedKeysFile lines from $sshd_config" + problemsfound=$(($problemsfound+1)) + fi + + if [ "$problemsfound" -gt 0 ]; then + echo "When the above $problemsfound issue"$(if [ "$problemsfound" -eq 1 ] ; then echo " is" ; else echo "s are" ; fi)" resolved, please re-run:" + echo " monkeysphere-server diagnostics" + else + echo "Everything seems to be in order!" + fi +} + +# retrieve key from web of trust, import it into the host keyring, and +# ltsign the key in the host keyring so that it may certify other keys +add_certifier() { + local domain + local trust + local depth + local keyID + local fingerprint + local ltsignCommand + local trustval + + # set default values for trust depth and domain + domain= + trust=full + depth=1 + + # get options + while true ; do + case "$1" in + -n|--domain) + domain="$2" + shift 2 + ;; + -t|--trust) + trust="$2" + shift 2 + ;; + -d|--depth) + depth="$2" + shift 2 + ;; + *) + if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then + failure "Unknown option '$1'. +Type '$PGRM help' for usage." + fi + break + ;; + esac + done + + keyID="$1" + if [ -z "$keyID" ] ; then + failure "You must specify the key ID of a key to add, or specify a file to read the key from." + fi + if [ -f "$keyID" ] ; then + echo "Reading key from file '$keyID':" + importinfo=$(gpg_authentication "--import" < "$keyID" 2>&1) || failure "could not read key from '$keyID'" + # FIXME: if this is tried when the key database is not + # up-to-date, i got these errors (using set -x): + +# ++ su -m monkeysphere -c '\''gpg --import'\'' +# Warning: using insecure memory! +# gpg: key D21739E9: public key "Daniel Kahn Gillmor <dkg@fifthhorseman.net>" imported +# gpg: Total number processed: 1 +# gpg: imported: 1 (RSA: 1) +# gpg: can'\''t create `/var/monkeysphere/gnupg-host/pubring.gpg.tmp'\'': Permission denied +# gpg: failed to rebuild keyring cache: Permission denied +# gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model +# gpg: depth: 0 valid: 1 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 1u +# gpg: next trustdb check due at 2009-01-10' +# + failure 'could not read key from '\''/root/dkg.gpg'\''' +# + echo 'could not read key from '\''/root/dkg.gpg'\''' + + keyID=$(echo "$importinfo" | grep '^gpg: key ' | cut -f2 -d: | cut -f3 -d\ ) + if [ -z "$keyID" ] || [ $(echo "$keyID" | wc -l) -ne 1 ] ; then + failure "Expected there to be a single gpg key in the file." + fi + else + # get the key from the key server + gpg_authentication "--keyserver $KEYSERVER --recv-key '0x${keyID}!'" || failure "Could not receive a key with this ID from the '$KEYSERVER' keyserver." + fi + + export keyID + + + # get the full fingerprint of a key ID + fingerprint=$(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 0x${fingerprint}!" + + echo "Are you sure you want to add the above key as a" + read -p "certifier of users on this system? (y/N) " OK; OK=${OK:-N} + if [ "${OK/y/Y}" != 'Y' ] ; then + failure "Identity certifier not added." + fi + + # export the key to the host keyring + gpg_authentication "--export 0x${fingerprint}!" | gpg_host --import + + if [ "$trust" = marginal ]; then + trustval=1 + elif [ "$trust" = full ]; then + trustval=2 + else + failure "Trust value requested ('$trust') was unclear (only 'marginal' or 'full' are supported)." + fi + + # ltsign command + # NOTE: *all* user IDs will be ltsigned + ltsignCommand=$(cat <<EOF +ltsign +y +$trustval +$depth +$domain +y +save +EOF + ) + + # ltsign the key + if echo "$ltsignCommand" | \ + gpg_host --quiet --command-fd 0 --edit-key "0x${fingerprint}!" ; then + + # update the trustdb for the authentication keyring + gpg_authentication "--check-trustdb" + + echo + echo "Identity certifier added." + else + failure "Problem adding identify certifier." + fi +} + +# delete a certifiers key from the host keyring +remove_certifier() { + local keyID + local fingerprint + + keyID="$1" + if [ -z "$keyID" ] ; then + failure "You must specify the key ID of a key to remove." + fi + + 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" + + echo + echo "Identity certifier removed." + else + failure "Problem removing identity certifier." + fi +} + +# list the host certifiers +list_certifiers() { + 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 +} + +######################################################################## +# MAIN +######################################################################## + +# unset variables that should be defined only in config file +unset KEYSERVER +unset AUTHORIZED_USER_IDS +unset RAW_AUTHORIZED_KEYS +unset MONKEYSPHERE_USER + +# load configuration file +[ -e ${MONKEYSPHERE_SERVER_CONFIG:="${SYSCONFIGDIR}/monkeysphere-server.conf"} ] && . "$MONKEYSPHERE_SERVER_CONFIG" + +# set empty config variable with ones from the environment, or with +# defaults +LOG_LEVEL=${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:=${MONKEYSPHERE_USER:="monkeysphere"}} + +# other variables +CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:="true"} +REQUIRED_USER_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"} +GNUPGHOME_HOST=${MONKEYSPHERE_GNUPGHOME_HOST:="${SYSDATADIR}/gnupg-host"} +GNUPGHOME_AUTHENTICATION=${MONKEYSPHERE_GNUPGHOME_AUTHENTICATION:="${SYSDATADIR}/gnupg-authentication"} + +# export variables needed in su invocation +export DATE +export MODE +export MONKEYSPHERE_USER +export LOG_LEVEL +export KEYSERVER +export CHECK_KEYSERVER +export REQUIRED_USER_KEY_CAPABILITY +export GNUPGHOME_HOST +export GNUPGHOME_AUTHENTICATION +export GNUPGHOME + +# get subcommand +COMMAND="$1" +[ "$COMMAND" ] || failure "Type '$PGRM help' for usage." +shift + +case $COMMAND in + 'update-users'|'update-user'|'u') + check_user + check_host_keyring + update_users "$@" + ;; + + 'add-identity-certifier'|'add-id-certifier'|'add-certifier'|'c+') + check_user + check_host_keyring + add_certifier "$@" + ;; + + 'remove-identity-certifier'|'remove-id-certifier'|'remove-certifier'|'c-') + check_user + check_host_keyring + remove_certifier "$@" + ;; + + 'list-identity-certifiers'|'list-id-certifiers'|'list-certifiers'|'list-certifier'|'c') + check_user + check_host_keyring + list_certifiers "$@" + ;; + + 'expert'|'e') + check_user + SUBCOMMAND="$1" + shift + case "$SUBCOMMAND" in + 'diagnostics'|'d') + diagnostics + ;; + + 'gpg-cmd') + gpg_authentication "$@" + ;; + + *) + failure "Unknown expert subcommand: '$COMMAND' +Type '$PGRM help' for usage." + ;; + esac + ;; + + 'version'|'v') + echo "$VERSION" + ;; + + '--help'|'help'|'-h'|'h'|'?') + usage + ;; + + *) + failure "Unknown command: '$COMMAND' +Type '$PGRM help' for usage." + ;; +esac + +exit "$RETURN" diff --git a/src/monkeysphere-server b/src/monkeysphere-host index 96f5b56..9eed3ac 100755 --- a/src/monkeysphere-server +++ b/src/monkeysphere-host @@ -1,6 +1,6 @@ #!/usr/bin/env bash -# monkeysphere-server: MonkeySphere server admin tool +# monkeysphere-host: Monkeysphere host admin tool # # The monkeysphere scripts are written by: # Jameson Rollins <jrollins@fifthhorseman.net> @@ -17,7 +17,7 @@ SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"} export SYSSHAREDIR . "${SYSSHAREDIR}/common" || exit 1 -SYSDATADIR=${MONKEYSPHERE_SYSDATADIR:-"/var/lib/monkeysphere"} +SYSDATADIR=${MONKEYSPHERE_SYSDATADIR:-"/var/lib/monkeysphere/host"} export SYSDATADIR # monkeysphere temp directory, in sysdatadir to enable atomic moves of @@ -41,38 +41,28 @@ RETURN=0 usage() { cat <<EOF >&2 usage: $PGRM <subcommand> [options] [args] -Monkeysphere server admin tool. +Monkeysphere host admin tool. subcommands: - update-users (u) [USER]... update user authorized_keys files + show-key (s) output all host key information + extend-key (e) EXPIRE extend 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 server host key to keyserver - import-key (i) import existing ssh key to gpg + expert + import-key (i) import existing ssh key to gpg --hostname (-h) NAME[:PORT] hostname for key user ID --keyfile (-f) FILE key file to import --expire (-e) EXPIRE date to expire - gen-key (g) generate gpg key for the host + gen-key (g) generate gpg key for the host --hostname (-h) NAME[:PORT] hostname for key user ID --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 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 - show-key (s) output all server host key information - 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 - --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 give a gpg command to the - authentication keyring + diagnostics (d) monkeysphere host status version (v) show version number help (h,?) this help @@ -115,17 +105,6 @@ gpg_host() { return "$returnCode" } -# function to interact with the authentication gnupg keyring -# FIXME: this function requires basically accepts only a single -# argument because of problems with quote expansion. this needs to be -# fixed/improved. -gpg_authentication() { - GNUPGHOME="$GNUPGHOME_AUTHENTICATION" - export GNUPGHOME - - su_monkeysphere_user "gpg $@" -} - # check if user is root is_root() { [ $(id -u 2>/dev/null) = '0' ] @@ -181,144 +160,6 @@ show_server_key() { return $ret } -# update authorized_keys for users -update_users() { - if [ "$1" ] ; then - # get users from command line - unames="$@" - else - # or just look at all users if none specified - unames=$(getent passwd | cut -d: -f1) - fi - - RETCODE=0 - - # set mode - MODE="authorized_keys" - - # set gnupg home - GNUPGHOME="$GNUPGHOME_AUTHENTICATION" - - # check to see if the gpg trust database has been initialized - if [ ! -s "${GNUPGHOME}/trustdb.gpg" ] ; then - failure "GNUPG trust database uninitialized. Please see MONKEYSPHERE-SERVER(8)." - fi - - # make sure the authorized_keys directory exists - mkdir -p "${SYSDATADIR}/authorized_keys" - - # loop over users - for uname in $unames ; do - # check all specified users exist - if ! id "$uname" >/dev/null ; then - log error "----- unknown user '$uname' -----" - continue - fi - - log verbose "----- user: $uname -----" - - # make temporary directory - TMPLOC=$(mktemp -d ${MSTMPDIR}/tmp.XXXXXXXXXX) || failure "Could not create temporary directory!" - - # trap to delete temporary directory on exit - trap "rm -rf $TMPLOC" EXIT - - # create temporary authorized_user_ids file - TMP_AUTHORIZED_USER_IDS="${TMPLOC}/authorized_user_ids" - touch "$TMP_AUTHORIZED_USER_IDS" - - # create temporary authorized_keys file - AUTHORIZED_KEYS="${TMPLOC}/authorized_keys" - touch "$AUTHORIZED_KEYS" - - # set restrictive permissions on the temporary files - # FIXME: is there a better way to do this? - chmod 0700 "$TMPLOC" - chmod 0600 "$AUTHORIZED_KEYS" - chmod 0600 "$TMP_AUTHORIZED_USER_IDS" - chown -R "$MONKEYSPHERE_USER" "$TMPLOC" - - # process authorized_user_ids file - log debug "checking for authorized_user_ids..." - # translating ssh-style path variables - authorizedUserIDs=$(translate_ssh_variables "$uname" "$AUTHORIZED_USER_IDS") - if [ -s "$authorizedUserIDs" ] ; then - # check permissions on the authorized_user_ids file path - if check_key_file_permissions "$uname" "$authorizedUserIDs" ; then - # copy user authorized_user_ids file to temporary - # location - cat "$authorizedUserIDs" > "$TMP_AUTHORIZED_USER_IDS" - - # export needed variables - export AUTHORIZED_KEYS - export TMP_AUTHORIZED_USER_IDS - - # process authorized_user_ids file, as monkeysphere - # user - su_monkeysphere_user \ - ". ${SYSSHAREDIR}/common; process_authorized_user_ids $TMP_AUTHORIZED_USER_IDS" - RETURN="$?" - else - log debug "not processing authorized_user_ids." - fi - else - log debug "empty or absent authorized_user_ids file." - fi - - # add user-controlled authorized_keys file if specified - # translate ssh-style path variables - rawAuthorizedKeys=$(translate_ssh_variables "$uname" "$RAW_AUTHORIZED_KEYS") - if [ "$rawAuthorizedKeys" != 'none' ] ; then - log debug "checking for raw authorized_keys..." - if [ -s "$rawAuthorizedKeys" ] ; then - # check permissions on the authorized_keys file path - if check_key_file_permissions "$uname" "$rawAuthorizedKeys" ; then - log verbose "adding raw authorized_keys file... " - cat "$rawAuthorizedKeys" >> "$AUTHORIZED_KEYS" - else - log debug "not adding raw authorized_keys file." - fi - else - log debug "empty or absent authorized_keys file." - fi - fi - - # move the new authorized_keys file into place - if [ -s "$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. - - # but in general, we don't want the user tampering with - # this file directly, so we'll adopt this approach: Own - # the file by the monkeysphere-server invoker (usually - # root, but should be the same uid that sshd is launched - # as); change the group of the file so that members of the - # user's group can read it. - - # FIXME: is there a better way to do this? - chown $(whoami) "$AUTHORIZED_KEYS" && \ - chgrp $(id -g "$uname") "$AUTHORIZED_KEYS" && \ - chmod g+r "$AUTHORIZED_KEYS" && \ - mv -f "$AUTHORIZED_KEYS" "${SYSDATADIR}/authorized_keys/${uname}" || \ - { - log error "Failed to install authorized_keys for '$uname'!" - rm -f "${SYSDATADIR}/authorized_keys/${uname}" - # indicate that there has been a failure: - RETURN=1 - } - else - rm -f "${SYSDATADIR}/authorized_keys/${uname}" - fi - - # unset the trap - trap - EXIT - - # destroy temporary directory - rm -rf "$TMPLOC" - done -} - # import an existing ssh key to a gpg key import_key() { local hostName=$(hostname -f) @@ -691,7 +532,6 @@ publish_server_key() { gpg_authentication "--keyserver $KEYSERVER --send-keys '0x${fingerprint}!'" } - diagnostics() { # * check on the status and validity of the key and public certificates local seckey @@ -862,192 +702,6 @@ diagnostics() { fi } -# retrieve key from web of trust, import it into the host keyring, and -# ltsign the key in the host keyring so that it may certify other keys -add_certifier() { - local domain - local trust - local depth - local keyID - local fingerprint - local ltsignCommand - local trustval - - # set default values for trust depth and domain - domain= - trust=full - depth=1 - - # get options - while true ; do - case "$1" in - -n|--domain) - domain="$2" - shift 2 - ;; - -t|--trust) - trust="$2" - shift 2 - ;; - -d|--depth) - depth="$2" - shift 2 - ;; - *) - if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then - failure "Unknown option '$1'. -Type '$PGRM help' for usage." - fi - break - ;; - esac - done - - keyID="$1" - if [ -z "$keyID" ] ; then - failure "You must specify the key ID of a key to add, or specify a file to read the key from." - fi - if [ -f "$keyID" ] ; then - echo "Reading key from file '$keyID':" - importinfo=$(gpg_authentication "--import" < "$keyID" 2>&1) || failure "could not read key from '$keyID'" - # FIXME: if this is tried when the key database is not - # up-to-date, i got these errors (using set -x): - -# ++ su -m monkeysphere -c '\''gpg --import'\'' -# Warning: using insecure memory! -# gpg: key D21739E9: public key "Daniel Kahn Gillmor <dkg@fifthhorseman.net>" imported -# gpg: Total number processed: 1 -# gpg: imported: 1 (RSA: 1) -# gpg: can'\''t create `/var/monkeysphere/gnupg-host/pubring.gpg.tmp'\'': Permission denied -# gpg: failed to rebuild keyring cache: Permission denied -# gpg: 3 marginal(s) needed, 1 complete(s) needed, PGP trust model -# gpg: depth: 0 valid: 1 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 1u -# gpg: next trustdb check due at 2009-01-10' -# + failure 'could not read key from '\''/root/dkg.gpg'\''' -# + echo 'could not read key from '\''/root/dkg.gpg'\''' - - keyID=$(echo "$importinfo" | grep '^gpg: key ' | cut -f2 -d: | cut -f3 -d\ ) - if [ -z "$keyID" ] || [ $(echo "$keyID" | wc -l) -ne 1 ] ; then - failure "Expected there to be a single gpg key in the file." - fi - else - # get the key from the key server - gpg_authentication "--keyserver $KEYSERVER --recv-key '0x${keyID}!'" || failure "Could not receive a key with this ID from the '$KEYSERVER' keyserver." - fi - - export keyID - - - # get the full fingerprint of a key ID - fingerprint=$(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 0x${fingerprint}!" - - echo "Are you sure you want to add the above key as a" - read -p "certifier of users on this system? (y/N) " OK; OK=${OK:-N} - if [ "${OK/y/Y}" != 'Y' ] ; then - failure "Identity certifier not added." - fi - - # export the key to the host keyring - gpg_authentication "--export 0x${fingerprint}!" | gpg_host --import - - if [ "$trust" = marginal ]; then - trustval=1 - elif [ "$trust" = full ]; then - trustval=2 - else - failure "Trust value requested ('$trust') was unclear (only 'marginal' or 'full' are supported)." - fi - - # ltsign command - # NOTE: *all* user IDs will be ltsigned - ltsignCommand=$(cat <<EOF -ltsign -y -$trustval -$depth -$domain -y -save -EOF - ) - - # ltsign the key - if echo "$ltsignCommand" | \ - gpg_host --quiet --command-fd 0 --edit-key "0x${fingerprint}!" ; then - - # update the trustdb for the authentication keyring - gpg_authentication "--check-trustdb" - - echo - echo "Identity certifier added." - else - failure "Problem adding identify certifier." - fi -} - -# delete a certifiers key from the host keyring -remove_certifier() { - local keyID - local fingerprint - - keyID="$1" - if [ -z "$keyID" ] ; then - failure "You must specify the key ID of a key to remove." - fi - - 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" - - echo - echo "Identity certifier removed." - else - failure "Problem removing identity certifier." - fi -} - -# list the host certifiers -list_certifiers() { - 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 $key" - done -} - -# issue command to gpg-authentication keyring -gpg_authentication_cmd() { - gpg_authentication "$@" -} - ######################################################################## # MAIN ######################################################################## @@ -1093,20 +747,8 @@ COMMAND="$1" shift case $COMMAND in - 'update-users'|'update-user'|'u') - check_user - check_host_keyring - update_users "$@" - ;; - - 'import-key'|'i') - check_user - import_key "$@" - ;; - - 'gen-key'|'g') - check_user - gen_key "$@" + 'show-key'|'show'|'s') + show_server_key ;; 'extend-key'|'e') @@ -1139,42 +781,34 @@ case $COMMAND in revoke_key "$@" ;; - 'show-key'|'show'|'s') - show_server_key - ;; - 'publish-key'|'publish'|'p') check_user check_host_keyring publish_server_key ;; - 'diagnostics'|'d') + 'expert'|'e') check_user - diagnostics - ;; - - 'add-identity-certifier'|'add-id-certifier'|'add-certifier'|'c+') - check_user - check_host_keyring - add_certifier "$@" - ;; + SUBCOMMAND="$1" + shift + case "$SUBCOMMAND" in + 'import-key'|'i') + import_key "$@" + ;; - 'remove-identity-certifier'|'remove-id-certifier'|'remove-certifier'|'c-') - check_user - check_host_keyring - remove_certifier "$@" - ;; + 'gen-key'|'g') + gen_key "$@" + ;; - 'list-identity-certifiers'|'list-id-certifiers'|'list-certifiers'|'list-certifier'|'c') - check_user - check_host_keyring - list_certifiers "$@" - ;; + 'diagnostics'|'d') + diagnostics + ;; - 'gpg-authentication-cmd') - check_user - gpg_authentication_cmd "$@" + *) + failure "Unknown expert subcommand: '$COMMAND' +Type '$PGRM help' for usage." + ;; + esac ;; 'version'|'v') diff --git a/src/monkeysphere-ssh-proxycommand b/src/subcommands/m/ssh-proxycommand index a609199..a609199 100755 --- a/src/monkeysphere-ssh-proxycommand +++ b/src/subcommands/m/ssh-proxycommand |