From e1306b6f0fe4028b3d62538c15099b993e3c64c9 Mon Sep 17 00:00:00 2001 From: Jameson Graef Rollins Date: Sat, 31 Jan 2009 16:42:02 -0500 Subject: - break out monkeysphere-server command into monkeysphere-{host,authentication} commands - break out etc config into host/authentication configs --- src/subcommands/m/ssh-proxycommand | 250 +++++++++++++++++++++++++++++++++++++ 1 file changed, 250 insertions(+) create mode 100755 src/subcommands/m/ssh-proxycommand (limited to 'src/subcommands') diff --git a/src/subcommands/m/ssh-proxycommand b/src/subcommands/m/ssh-proxycommand new file mode 100755 index 0000000..a609199 --- /dev/null +++ b/src/subcommands/m/ssh-proxycommand @@ -0,0 +1,250 @@ +#!/usr/bin/env bash + +# monkeysphere-ssh-proxycommand: MonkeySphere ssh ProxyCommand hook +# +# The monkeysphere scripts are written by: +# Jameson Rollins +# +# They are Copyright 2008, and are all released under the GPL, version 3 +# or later. + +# This is meant to be run as an ssh ProxyCommand to initiate a +# monkeysphere known_hosts update before an ssh connection to host is +# established. Can be added to ~/.ssh/config as follows: +# ProxyCommand monkeysphere-ssh-proxycommand %h %p + +######################################################################## +PGRM=$(basename $0) + +SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"} +export SYSSHAREDIR +. "${SYSSHAREDIR}/common" || exit 1 + +######################################################################## +# FUNCTIONS +######################################################################## + +usage() { + cat <&2 +usage: ssh -o ProxyCommand="$(basename $0) %h %p" ... +EOF +} + +log() { + echo "$@" >&2 +} + +output_no_valid_key() { + local sshKeyOffered + local userID + local type + local validity + local keyid + local uidfpr + local usage + local sshKeyGPG + local tmpkey + local sshFingerprint + local gpgSigOut + + userID="ssh://${HOSTP}" + + log "-------------------- Monkeysphere warning -------------------" + log "Monkeysphere found OpenPGP keys for this hostname, but none had full validity." + + # retrieve the actual ssh key + sshKeyOffered=$(ssh-keyscan -t rsa -p "$PORT" "$HOST" 2>/dev/null | awk '{ print $2, $3 }') + # FIXME: should we do any checks for failed keyscans, eg. host not + # found? + + # get the gpg info for userid + gpgOut=$(gpg --list-key --fixed-list-mode --with-colon \ + --with-fingerprint --with-fingerprint \ + ="$userID" 2>/dev/null) + + # find all 'pub' and 'sub' lines in the gpg output, which each + # represent a retrieved key for the user ID + echo "$gpgOut" | cut -d: -f1,2,5,10,12 | \ + while IFS=: read -r type validity keyid uidfpr usage ; do + case $type in + 'pub'|'sub') + # get the ssh key of the gpg key + sshKeyGPG=$(gpg2ssh "$keyid") + + # if one of keys found matches the one offered by the + # host, then output info + if [ "$sshKeyGPG" = "$sshKeyOffered" ] ; then + log "An OpenPGP key matching the ssh key offered by the host was found:" + log + + # do some crazy "Here Strings" redirection to get the key to + # ssh-keygen, since it doesn't read from stdin cleanly + sshFingerprint=$(ssh-keygen -l -f /dev/stdin \ + <<<$(echo "$sshKeyGPG") | \ + awk '{ print $2 }') + + # get the sigs for the matching key + gpgSigOut=$(gpg --check-sigs \ + --list-options show-uid-validity \ + "$keyid") + + # output the sigs, but only those on the user ID + # we are looking for + echo "$gpgSigOut" | awk ' +{ +if (match($0,"^pub")) { print; } +if (match($0,"^uid")) { ok=0; } +if (match($0,"^uid.*'$userID'$")) { ok=1; print; } +if (ok) { if (match($0,"^sig")) { print; } } +} +' >&2 + log + + # output the other user IDs for reference + if (echo "$gpgSigOut" | grep "^uid" | grep -v -q "$userID") ; then + log "Other user IDs on this key:" + echo "$gpgSigOut" | grep "^uid" | grep -v "$userID" >&2 + log + fi + + # output ssh fingerprint + log "RSA key fingerprint is ${sshFingerprint}." + + # this whole process is in a "while read" + # subshell. the only way to get information out + # of the subshell is to change the return code. + # therefore we return 1 here to indicate that a + # matching gpg key was found for the ssh key + # offered by the host + return 1 + fi + ;; + esac + done + + # if no key match was made (and the "while read" subshell returned + # 1) output how many keys were found + if (($? != 1)) ; then + log "None of the found keys matched the key offered by the host." + log "Run the following command for more info about the found keys:" + log "gpg --check-sigs --list-options show-uid-validity =${userID}" + # FIXME: should we do anything extra here if the retrieved + # host key is actually in the known_hosts file and the ssh + # connection will succeed? Should the user be warned? + # prompted? + fi + + log "-------------------- ssh continues below --------------------" +} + +######################################################################## + +# export the monkeysphere log level +export MONKEYSPHERE_LOG_LEVEL + +if [ "$1" = '--no-connect' ] ; then + NO_CONNECT='true' + shift 1 +fi + +HOST="$1" +PORT="$2" + +if [ -z "$HOST" ] ; then + log "Host not specified." + usage + exit 255 +fi +if [ -z "$PORT" ] ; then + PORT=22 +fi + +# set the host URI +if [ "$PORT" != '22' ] ; then + HOSTP="${HOST}:${PORT}" +else + HOSTP="${HOST}" +fi +URI="ssh://${HOSTP}" + +# specify keyserver checking. the behavior of this proxy command is +# intentionally different than that of running monkeyesphere normally, +# and keyserver checking is intentionally done under certain +# circumstances. This can be overridden by setting the +# MONKEYSPHERE_CHECK_KEYSERVER environment variable. + +# if the host is in the gpg keyring... +if gpg --list-key ="${URI}" 2>&1 >/dev/null ; then + # do not check the keyserver + CHECK_KEYSERVER="false" + +# if the host is NOT in the keyring... +else + # if the host key is found in the known_hosts file... + # FIXME: this only works for default known_hosts location + hostKey=$(ssh-keygen -F "$HOST" 2>/dev/null) + + if [ "$hostKey" ] ; then + # do not check the keyserver + # FIXME: more nuanced checking should be done here to properly + # take into consideration hosts that join monkeysphere by + # converting an existing and known ssh key + CHECK_KEYSERVER="false" + + # if the host key is not found in the known_hosts file... + else + # check the keyserver + CHECK_KEYSERVER="true" + fi +fi +# set and export the variable for use by monkeysphere +MONKEYSPHERE_CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:="$CHECK_KEYSERVER"} +export MONKEYSPHERE_CHECK_KEYSERVER + +# update the known_hosts file for the host +monkeysphere update-known_hosts "$HOSTP" + +# output on depending on the return of the update-known_hosts +# subcommand, which is (ultimately) the return code of the +# update_known_hosts function in common +case $? in + 0) + # acceptable host key found so continue to ssh + true + ;; + 1) + # no hosts at all found so also continue (drop through to + # regular ssh host verification) + true + ;; + 2) + # at least one *bad* host key (and no good host keys) was + # found, so output some usefull information + output_no_valid_key + ;; + *) + # anything else drop through + true + ;; +esac + +# FIXME: what about the case where monkeysphere successfully finds a +# valid key for the host and adds it to the known_hosts file, but a +# different non-monkeysphere key for the host already exists in the +# known_hosts, and it is this non-ms key that is offered by the host? +# monkeysphere will succeed, and the ssh connection will succeed, and +# the user will be left with the impression that they are dealing with +# a OpenPGP/PKI host key when in fact they are not. should we use +# ssh-keyscan to compare the keys first? + +# exec a netcat passthrough to host for the ssh connection +if [ -z "$NO_CONNECT" ] ; then + if (which nc 2>/dev/null >/dev/null); then + exec nc "$HOST" "$PORT" + elif (which socat 2>/dev/null >/dev/null); then + exec socat STDIO "TCP:$HOST:$PORT" + else + echo "Neither netcat nor socat found -- could not complete monkeysphere-ssh-proxycommand connection to $HOST:$PORT" >&2 + exit 255 + fi +fi -- cgit v1.2.3 From 53fdf9b3e431d9f3538c1b2196276492bec2fc7e Mon Sep 17 00:00:00 2001 From: Jameson Graef Rollins Date: Sat, 31 Jan 2009 17:01:59 -0500 Subject: break out import-key and gen-key from monkeysphere-host break out diagnostics and update-users from monkeysphere-authentication --- src/monkeysphere-authentication | 138 ----------------------------- src/monkeysphere-host | 187 ---------------------------------------- src/subcommands/ma/diagnostics | 12 +++ src/subcommands/ma/update-users | 144 +++++++++++++++++++++++++++++++ src/subcommands/mh/gen-key | 118 +++++++++++++++++++++++++ src/subcommands/mh/import-key | 85 ++++++++++++++++++ 6 files changed, 359 insertions(+), 325 deletions(-) create mode 100755 src/subcommands/ma/diagnostics create mode 100755 src/subcommands/ma/update-users create mode 100755 src/subcommands/mh/gen-key create mode 100755 src/subcommands/mh/import-key (limited to 'src/subcommands') diff --git a/src/monkeysphere-authentication b/src/monkeysphere-authentication index 71ca91f..cac0e18 100755 --- a/src/monkeysphere-authentication +++ b/src/monkeysphere-authentication @@ -134,144 +134,6 @@ check_host_keyring() { || 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 diff --git a/src/monkeysphere-host b/src/monkeysphere-host index 9eed3ac..830646a 100755 --- a/src/monkeysphere-host +++ b/src/monkeysphere-host @@ -160,193 +160,6 @@ show_server_key() { return $ret } -# import an existing ssh key to a gpg key -import_key() { - local hostName=$(hostname -f) - local keyFile="/etc/ssh/ssh_host_rsa_key" - local keyExpire - local userID - - # check for presense of secret key - # FIXME: is this the proper test to be doing here? - fingerprint_server_key >/dev/null \ - && failure "An OpenPGP host key already exists." - - # get options - while true ; do - case "$1" in - -h|--hostname) - hostName="$2" - shift 2 - ;; - -f|--keyfile) - keyFile="$2" - shift 2 - ;; - -e|--expire) - keyExpire="$2" - shift 2 - ;; - *) - if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then - failure "Unknown option '$1'. -Type '$PGRM help' for usage." - fi - break - ;; - esac - done - - if [ ! -f "$keyFile" ] ; then - failure "SSH secret key file '$keyFile' not found." - fi - - userID="ssh://${hostName}" - - # prompt about key expiration if not specified - keyExpire=$(get_gpg_expiration "$keyExpire") - - echo "The following key parameters will be used for the host private key:" - echo "Import: $keyFile" - echo "Name-Real: $userID" - echo "Expire-Date: $keyExpire" - - read -p "Import key? (Y/n) " OK; OK=${OK:=Y} - if [ ${OK/y/Y} != 'Y' ] ; then - failure "aborting." - fi - - log verbose "importing ssh key..." - # translate ssh key to a private key - (umask 077 && \ - pem2openpgp "$userID" "$keyExpire" < "$sshKey" | gpg_host --import) - - # find the key fingerprint of the newly converted key - fingerprint=$(fingerprint_server_key) - - # export host ownertrust to authentication keyring - log verbose "setting ultimate owner trust for host key..." - echo "${fingerprint}:6:" | gpg_host "--import-ownertrust" - echo "${fingerprint}:6:" | gpg_authentication "--import-ownertrust" - - # export public key to file - gpg_authentication "--export-options export-minimal --armor --export 0x${fingerprint}\!" > "${SYSDATADIR}/ssh_host_rsa_key.pub.gpg" - log info "SSH host public key in OpenPGP form: ${SYSDATADIR}/ssh_host_rsa_key.pub.gpg" - - # show info about new key - show_server_key -} - -# generate server gpg key -gen_key() { - local keyType="RSA" - local keyLength="2048" - local keyUsage="auth" - local keyExpire - local revoker - local hostName=$(hostname -f) - local userID - local keyParameters - local fingerprint - - # check for presense of secret key - # FIXME: is this the proper test to be doing here? - fingerprint_server_key >/dev/null \ - && failure "An OpenPGP host key already exists." - - # get options - while true ; do - case "$1" in - -h|--hostname) - hostName="$2" - shift 2 - ;; - -l|--length) - keyLength="$2" - shift 2 - ;; - -e|--expire) - keyExpire="$2" - shift 2 - ;; - -r|--revoker) - revoker="$2" - shift 2 - ;; - *) - if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then - failure "Unknown option '$1'. -Type '$PGRM help' for usage." - fi - break - ;; - esac - done - - userID="ssh://${hostName}" - - # prompt about key expiration if not specified - keyExpire=$(get_gpg_expiration "$keyExpire") - - # set key parameters - keyParameters=\ -"Key-Type: $keyType -Key-Length: $keyLength -Key-Usage: $keyUsage -Name-Real: $userID -Expire-Date: $keyExpire" - - # add the revoker field if specified - # FIXME: the "1:" below assumes that $REVOKER's key is an RSA key. - # FIXME: key is marked "sensitive"? is this appropriate? - if [ "$revoker" ] ; then - keyParameters=\ -"${keyParameters} -Revoker: 1:${revoker} sensitive" - fi - - echo "The following key parameters will be used for the host private key:" - echo "$keyParameters" - - read -p "Generate key? (Y/n) " OK; OK=${OK:=Y} - if [ ${OK/y/Y} != 'Y' ] ; then - failure "aborting." - fi - - # add commit command - # must include blank line! - keyParameters=\ -"${keyParameters} - -%commit -%echo done" - - log verbose "generating host key..." - echo "$keyParameters" | gpg_host --batch --gen-key - - # find the key fingerprint of the newly generated key - fingerprint=$(fingerprint_server_key) - - # export host ownertrust to authentication keyring - log verbose "setting ultimate owner trust for host key..." - echo "${fingerprint}:6:" | gpg_authentication "--import-ownertrust" - - # translate the private key to ssh format, and export to a file - # for sshs usage. - # NOTE: assumes that the primary key is the proper key to use - (umask 077 && \ - gpg_host --export-secret-key "$fingerprint" | \ - openpgp2ssh "$fingerprint" > "${SYSDATADIR}/ssh_host_rsa_key") - log info "SSH host private key output to file: ${SYSDATADIR}/ssh_host_rsa_key" - ssh-keygen -y -f "${SYSDATADIR}/ssh_host_rsa_key" > "${SYSDATADIR}/ssh_host_rsa_key.pub" - log info "SSH host public key output to file: ${SYSDATADIR}/ssh_host_rsa_key.pub" - gpg_authentication "--export-options export-minimal --armor --export 0x${fingerprint}\!" > "${SYSDATADIR}/ssh_host_rsa_key.pub.gpg" - log info "SSH host public key in OpenPGP form: ${SYSDATADIR}/ssh_host_rsa_key.pub.gpg" - - # show info about new key - show_server_key -} - # extend the lifetime of a host key: extend_key() { local fpr=$(fingerprint_server_key) diff --git a/src/subcommands/ma/diagnostics b/src/subcommands/ma/diagnostics new file mode 100755 index 0000000..3eadeed --- /dev/null +++ b/src/subcommands/ma/diagnostics @@ -0,0 +1,12 @@ +#!/usr/bin/env bash + +# Monkeysphere authentication diagnostics subcommand +# +# The monkeysphere scripts are written by: +# Jameson Rollins +# Jamie McClelland +# Daniel Kahn Gillmor +# +# They are Copyright 2008, and are all released under the GPL, version 3 +# or later. + diff --git a/src/subcommands/ma/update-users b/src/subcommands/ma/update-users new file mode 100755 index 0000000..a26d3fb --- /dev/null +++ b/src/subcommands/ma/update-users @@ -0,0 +1,144 @@ +#!/usr/bin/env bash + +# Monkeysphere authentication update-users subcommand +# +# The monkeysphere scripts are written by: +# Jameson Rollins +# Jamie McClelland +# Daniel Kahn Gillmor +# +# They are Copyright 2008, and are all released under the GPL, version 3 +# or later. + +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 "$TMPLOC" + done diff --git a/src/subcommands/mh/gen-key b/src/subcommands/mh/gen-key new file mode 100755 index 0000000..37469c7 --- /dev/null +++ b/src/subcommands/mh/gen-key @@ -0,0 +1,118 @@ +#!/usr/bin/env bash + +# Monkeysphere host gen-key subcommand +# +# The monkeysphere scripts are written by: +# Jameson Rollins +# Jamie McClelland +# Daniel Kahn Gillmor +# +# They are Copyright 2008, and are all released under the GPL, version 3 +# or later. + +local keyType="RSA" +local keyLength="2048" +local keyUsage="auth" +local keyExpire +local revoker +local hostName=$(hostname -f) +local userID +local keyParameters +local fingerprint + +# check for presense of secret key +# FIXME: is this the proper test to be doing here? +fingerprint_server_key >/dev/null \ + && failure "An OpenPGP host key already exists." + +# get options +while true ; do + case "$1" in + -h|--hostname) + hostName="$2" + shift 2 + ;; + -l|--length) + keyLength="$2" + shift 2 + ;; + -e|--expire) + keyExpire="$2" + shift 2 + ;; + -r|--revoker) + revoker="$2" + shift 2 + ;; + *) + if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then + failure "Unknown option '$1'. +Type '$PGRM help' for usage." + fi + break + ;; + esac +done + +userID="ssh://${hostName}" + +# prompt about key expiration if not specified +keyExpire=$(get_gpg_expiration "$keyExpire") + +# set key parameters +keyParameters=\ +"Key-Type: $keyType +Key-Length: $keyLength +Key-Usage: $keyUsage +Name-Real: $userID +Expire-Date: $keyExpire" + +# add the revoker field if specified +# FIXME: the "1:" below assumes that $REVOKER's key is an RSA key. +# FIXME: key is marked "sensitive"? is this appropriate? +if [ "$revoker" ] ; then + keyParameters=\ +"${keyParameters} +Revoker: 1:${revoker} sensitive" +fi + +echo "The following key parameters will be used for the host private key:" +echo "$keyParameters" + +read -p "Generate key? (Y/n) " OK; OK=${OK:=Y} +if [ ${OK/y/Y} != 'Y' ] ; then + failure "aborting." +fi + +# add commit command +# must include blank line! +keyParameters=\ +"${keyParameters} + +%commit +%echo done" + +log verbose "generating host key..." +echo "$keyParameters" | gpg_host --batch --gen-key + +# find the key fingerprint of the newly generated key +fingerprint=$(fingerprint_server_key) + +# export host ownertrust to authentication keyring +log verbose "setting ultimate owner trust for host key..." +echo "${fingerprint}:6:" | gpg_authentication "--import-ownertrust" + +# translate the private key to ssh format, and export to a file +# for sshs usage. +# NOTE: assumes that the primary key is the proper key to use +(umask 077 && \ + gpg_host --export-secret-key "$fingerprint" | \ + openpgp2ssh "$fingerprint" > "${SYSDATADIR}/ssh_host_rsa_key") +log info "SSH host private key output to file: ${SYSDATADIR}/ssh_host_rsa_key" +ssh-keygen -y -f "${SYSDATADIR}/ssh_host_rsa_key" > "${SYSDATADIR}/ssh_host_rsa_key.pub" +log info "SSH host public key output to file: ${SYSDATADIR}/ssh_host_rsa_key.pub" +gpg_authentication "--export-options export-minimal --armor --export 0x${fingerprint}\!" > "${SYSDATADIR}/ssh_host_rsa_key.pub.gpg" +log info "SSH host public key in OpenPGP form: ${SYSDATADIR}/ssh_host_rsa_key.pub.gpg" + +# show info about new key +show_server_key diff --git a/src/subcommands/mh/import-key b/src/subcommands/mh/import-key new file mode 100755 index 0000000..c33550b --- /dev/null +++ b/src/subcommands/mh/import-key @@ -0,0 +1,85 @@ +#!/usr/bin/env bash + +# Monkeysphere host import-key subcommand +# +# The monkeysphere scripts are written by: +# Jameson Rollins +# Jamie McClelland +# Daniel Kahn Gillmor +# +# They are Copyright 2008, and are all released under the GPL, version 3 +# or later. + +local hostName=$(hostname -f) +local keyFile="/etc/ssh/ssh_host_rsa_key" +local keyExpire +local userID + +# check for presense of secret key +# FIXME: is this the proper test to be doing here? +fingerprint_server_key >/dev/null \ + && failure "An OpenPGP host key already exists." + +# get options +while true ; do + case "$1" in + -h|--hostname) + hostName="$2" + shift 2 + ;; + -f|--keyfile) + keyFile="$2" + shift 2 + ;; + -e|--expire) + keyExpire="$2" + shift 2 + ;; + *) + if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then + failure "Unknown option '$1'. +Type '$PGRM help' for usage." + fi + break + ;; + esac +done + +if [ ! -f "$keyFile" ] ; then + failure "SSH secret key file '$keyFile' not found." +fi + +userID="ssh://${hostName}" + +# prompt about key expiration if not specified +keyExpire=$(get_gpg_expiration "$keyExpire") + +echo "The following key parameters will be used for the host private key:" +echo "Import: $keyFile" +echo "Name-Real: $userID" +echo "Expire-Date: $keyExpire" + +read -p "Import key? (Y/n) " OK; OK=${OK:=Y} +if [ ${OK/y/Y} != 'Y' ] ; then + failure "aborting." +fi + +log verbose "importing ssh key..." +# translate ssh key to a private key +(umask 077 && \ + pem2openpgp "$userID" "$keyExpire" < "$sshKey" | gpg_host --import) + +# find the key fingerprint of the newly converted key +fingerprint=$(fingerprint_server_key) + +# export host ownertrust to authentication keyring +log verbose "setting ultimate owner trust for host key..." +echo "${fingerprint}:6:" | gpg_host "--import-ownertrust" +echo "${fingerprint}:6:" | gpg_authentication "--import-ownertrust" + +# export public key to file +gpg_authentication "--export-options export-minimal --armor --export 0x${fingerprint}\!" > "${SYSDATADIR}/ssh_host_rsa_key.pub.gpg" +log info "SSH host public key in OpenPGP form: ${SYSDATADIR}/ssh_host_rsa_key.pub.gpg" + +# show info about new key +show_server_key -- cgit v1.2.3