diff options
Diffstat (limited to 'src/subcommands/ma')
| -rwxr-xr-x | src/subcommands/ma/add-certifier | 141 | ||||
| -rwxr-xr-x | src/subcommands/ma/diagnostics | 167 | ||||
| -rwxr-xr-x | src/subcommands/ma/list-certifiers | 25 | ||||
| -rwxr-xr-x | src/subcommands/ma/remove-certifier | 45 |
4 files changed, 378 insertions, 0 deletions
diff --git a/src/subcommands/ma/add-certifier b/src/subcommands/ma/add-certifier new file mode 100755 index 0000000..3bd800c --- /dev/null +++ b/src/subcommands/ma/add-certifier @@ -0,0 +1,141 @@ +#!/usr/bin/env bash + +# Monkeysphere authentication add-certifier subcommand +# +# 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. + +# 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 + +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${fingerprint}!" ; then + + # update the trustdb for the authentication keyring + gpg_authentication "--check-trustdb" + + echo + echo "Identity certifier added." +else + failure "Problem adding identify certifier." +fi diff --git a/src/subcommands/ma/diagnostics b/src/subcommands/ma/diagnostics index 3eadeed..b6003b0 100755 --- a/src/subcommands/ma/diagnostics +++ b/src/subcommands/ma/diagnostics @@ -10,3 +10,170 @@ # They are Copyright 2008, and are all released under the GPL, version 3 # or later. +# * check on the status and validity of the key and public certificates +local seckey +local keysfound +local curdate +local warnwindow +local warndate +local create +local expire +local uid +local fingerprint +local badhostkeys +local sshd_config +local problemsfound=0 + +# FIXME: what's the correct, cross-platform answer? +sshd_config=/etc/ssh/sshd_config +seckey=$(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 [ "$problemsfound" -eq 1 ] ; then echo " is" ; else echo "s are" ; fi)" resolved, please re-run:" + echo " monkeysphere-server diagnostics" +else + echo "Everything seems to be in order!" +fi diff --git a/src/subcommands/ma/list-certifiers b/src/subcommands/ma/list-certifiers new file mode 100755 index 0000000..789d553 --- /dev/null +++ b/src/subcommands/ma/list-certifiers @@ -0,0 +1,25 @@ +#!/usr/bin/env bash + +# Monkeysphere authentication list-certifiers subcommand +# +# The monkeysphere scripts are written by: +# Jameson Rollins <jrollins@fifthhorseman.net> +# Jamie McClelland <jm@mayfirst.org> +# Daniel Kahn Gillmor <dkg@fifthhorseman.net> +# +# They are Copyright 2008, and are all released under the GPL, version 3 +# or later. + +# list the host certifiers + +local keys +local key + +# find trusted keys in authentication keychain +keys=$(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 diff --git a/src/subcommands/ma/remove-certifier b/src/subcommands/ma/remove-certifier new file mode 100755 index 0000000..a4eaf54 --- /dev/null +++ b/src/subcommands/ma/remove-certifier @@ -0,0 +1,45 @@ +#!/usr/bin/env bash + +# Monkeysphere authentication remove-certifier subcommand +# +# 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. + +# delete a certifiers key from the host keyring + +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 + |