2 # This should be sourced by bash (though we welcome changes to make it POSIX sh compliant)
4 # Monkeysphere authentication update-users subcommand
6 # The monkeysphere scripts are written by:
7 # Jameson Rollins <jrollins@finestructure.net>
8 # Jamie McClelland <jm@mayfirst.org>
9 # Daniel Kahn Gillmor <dkg@fifthhorseman.net>
11 # They are Copyright 2008-2009, and are all released under the GPL,
18 local authorizedKeysDir
19 local authorizedUserIDs
22 # get users from command line
25 # or just look at all users if none specified
26 unames=$(getent passwd | cut -d: -f1)
32 MODE="authorized_keys"
35 GNUPGHOME="$GNUPGHOME_SPHERE"
37 # the authorized_keys directory
38 authorizedKeysDir="${SYSDATADIR}/authentication/authorized_keys"
40 # check to see if the gpg trust database has been initialized
41 if [ ! -s "${GNUPGHOME}/trustdb.gpg" ] ; then
42 failure "GNUPG trust database uninitialized. Please see MONKEYSPHERE-SERVER(8)."
45 # make sure the authorized_keys directory exists
46 mkdir -p "${authorizedKeysDir}"
49 for uname in $unames ; do
50 # check all specified users exist
51 if ! id "$uname" >/dev/null ; then
52 log error "----- unknown user '$uname' -----"
56 log verbose "----- user: $uname -----"
58 # make temporary directory
59 TMPLOC=$(mktemp -d ${MATMPDIR}/tmp.XXXXXXXXXX) || failure "Could not create temporary directory!"
61 # trap to delete temporary directory on exit
62 trap "rm -rf $TMPLOC" EXIT
64 # create temporary authorized_user_ids file
65 TMP_AUTHORIZED_USER_IDS="${TMPLOC}/authorized_user_ids"
66 touch "$TMP_AUTHORIZED_USER_IDS"
68 # create temporary authorized_keys file
69 AUTHORIZED_KEYS="${TMPLOC}/authorized_keys"
70 touch "$AUTHORIZED_KEYS"
72 # set restrictive permissions on the temporary files
73 # FIXME: is there a better way to do this?
75 chmod 0600 "$AUTHORIZED_KEYS"
76 chmod 0600 "$TMP_AUTHORIZED_USER_IDS"
77 chown -R "$MONKEYSPHERE_USER" "$TMPLOC"
79 # process authorized_user_ids file
80 log debug "checking for authorized_user_ids..."
81 # translating ssh-style path variables
82 authorizedUserIDs=$(translate_ssh_variables "$uname" "$AUTHORIZED_USER_IDS")
83 if [ -s "$authorizedUserIDs" ] ; then
84 # check permissions on the authorized_user_ids file path
85 if check_key_file_permissions "$uname" "$authorizedUserIDs" ; then
86 # copy user authorized_user_ids file to temporary
88 cat "$authorizedUserIDs" > "$TMP_AUTHORIZED_USER_IDS"
90 # export needed variables
91 export AUTHORIZED_KEYS
92 export TMP_AUTHORIZED_USER_IDS
94 # process authorized_user_ids file, as monkeysphere user
95 su_monkeysphere_user \
96 ". ${SYSSHAREDIR}/common; process_authorized_user_ids $TMP_AUTHORIZED_USER_IDS"
99 log debug "not processing authorized_user_ids."
102 log debug "empty or absent authorized_user_ids file."
105 # add user-controlled authorized_keys file if specified translate
106 # ssh-style path variables
107 rawAuthorizedKeys=$(translate_ssh_variables "$uname" "$RAW_AUTHORIZED_KEYS")
108 if [ "$rawAuthorizedKeys" != 'none' ] ; then
109 log debug "checking for raw authorized_keys..."
110 if [ -s "$rawAuthorizedKeys" ] ; then
111 # check permissions on the authorized_keys file path
112 if check_key_file_permissions "$uname" "$rawAuthorizedKeys" ; then
113 log verbose "adding raw authorized_keys file... "
114 cat "$rawAuthorizedKeys" >> "$AUTHORIZED_KEYS"
116 log debug "not adding raw authorized_keys file."
119 log debug "empty or absent authorized_keys file."
123 # move the new authorized_keys file into place
124 if [ -s "$AUTHORIZED_KEYS" ] ; then
125 # openssh appears to check the contents of the authorized_keys
126 # file as the user in question, so the file must be readable
127 # by that user at least.
129 # but in general, we don't want the user tampering with this
130 # file directly, so we'll adopt this approach: Own the file by
131 # the monkeysphere-server invoker (usually root, but should be
132 # the same uid that sshd is launched as); change the group of
133 # the file so that members of the user's group can read it.
135 # FIXME: is there a better way to do this?
136 chown $(whoami) "$AUTHORIZED_KEYS" && \
137 chgrp $(id -g "$uname") "$AUTHORIZED_KEYS" && \
138 chmod g+r "$AUTHORIZED_KEYS" && \
139 mv -f "$AUTHORIZED_KEYS" "${authorizedKeysDir}/${uname}" || \
141 log error "Failed to install authorized_keys for '$uname'!"
142 rm -f "${authorizedKeysDir}/${uname}"
143 # indicate that there has been a failure:
147 rm -f "${authorizedKeysDir}/${uname}"
153 # destroy temporary directory