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,
19 local authorizedKeysDir
20 local authorizedUserIDs
23 # get users from command line
26 # or just look at all users if none specified
31 GNUPGHOME="$GNUPGHOME_SPHERE"
33 # the authorized_keys directory
34 authorizedKeysDir="${SYSDATADIR}/authorized_keys"
36 # check to see if the gpg trust database has been initialized
37 if [ ! -s "${GNUPGHOME}/trustdb.gpg" ] ; then
38 failure "GNUPG trust database uninitialized. Please see MONKEYSPHERE-SERVER(8)."
41 # make sure the authorized_keys directory exists
42 mkdir -p "${authorizedKeysDir}"
45 for uname in $unames ; do
46 # check all specified users exist
47 if ! id "$uname" >/dev/null ; then
48 log error "----- unknown user '$uname' -----"
52 log verbose "----- user: $uname -----"
54 # make temporary directory
55 TMPLOC=$(mktemp -d ${MATMPDIR}/tmp.XXXXXXXXXX) || failure "Could not create temporary directory!"
57 # trap to delete temporary directory on exit
58 trap "rm -rf $TMPLOC" EXIT
60 # create temporary authorized_user_ids file
61 TMP_AUTHORIZED_USER_IDS="${TMPLOC}/authorized_user_ids"
62 touch "$TMP_AUTHORIZED_USER_IDS"
64 # create temporary authorized_keys file
65 AUTHORIZED_KEYS="${TMPLOC}/authorized_keys"
66 touch "$AUTHORIZED_KEYS"
68 # set restrictive permissions on the temporary files
69 # FIXME: is there a better way to do this?
71 chmod 0600 "$AUTHORIZED_KEYS"
72 chmod 0600 "$TMP_AUTHORIZED_USER_IDS"
73 chown -R "$MONKEYSPHERE_USER" "$TMPLOC"
75 # process authorized_user_ids file
76 log debug "checking for authorized_user_ids..."
77 # translating ssh-style path variables
78 authorizedUserIDs=$(translate_ssh_variables "$uname" "$AUTHORIZED_USER_IDS")
79 if [ -s "$authorizedUserIDs" ] ; then
80 log debug "authorized_user_ids file found."
81 # check permissions on the authorized_user_ids file path
82 if check_key_file_permissions "$uname" "$authorizedUserIDs" ; then
83 # copy user authorized_user_ids file to temporary
85 cat "$authorizedUserIDs" > "$TMP_AUTHORIZED_USER_IDS"
87 # export needed variables
88 export AUTHORIZED_KEYS
89 export TMP_AUTHORIZED_USER_IDS
91 # process authorized_user_ids file, as monkeysphere user
92 su_monkeysphere_user \
93 ". ${SYSSHAREDIR}/common; STRICT_MODES='$STRICT_MODES' process_authorized_user_ids $TMP_AUTHORIZED_USER_IDS" \
96 log debug "not processing authorized_user_ids."
99 log debug "empty or absent authorized_user_ids file."
102 # add user-controlled authorized_keys file if specified translate
103 # ssh-style path variables
104 rawAuthorizedKeys=$(translate_ssh_variables "$uname" "$RAW_AUTHORIZED_KEYS")
105 if [ "$rawAuthorizedKeys" != 'none' ] ; then
106 log debug "checking for raw authorized_keys..."
107 if [ -s "$rawAuthorizedKeys" ] ; then
108 # check permissions on the authorized_keys file path
109 if check_key_file_permissions "$uname" "$rawAuthorizedKeys" ; then
110 log verbose "adding raw authorized_keys file... "
111 cat "$rawAuthorizedKeys" >> "$AUTHORIZED_KEYS"
113 log debug "not adding raw authorized_keys file."
116 log debug "empty or absent authorized_keys file."
120 # move the new authorized_keys file into place
121 if [ -s "$AUTHORIZED_KEYS" ] ; then
122 # openssh appears to check the contents of the authorized_keys
123 # file as the user in question, so the file must be readable
124 # by that user at least.
126 # but in general, we don't want the user tampering with this
127 # file directly, so we'll adopt this approach: Own the file by
128 # the monkeysphere-server invoker (usually root, but should be
129 # the same uid that sshd is launched as); change the group of
130 # the file so that members of the user's group can read it.
132 # FIXME: is there a better way to do this?
133 chown $(whoami) "$AUTHORIZED_KEYS" && \
134 chgrp $(id -g "$uname") "$AUTHORIZED_KEYS" && \
135 chmod g+r "$AUTHORIZED_KEYS" && \
136 mv -f "$AUTHORIZED_KEYS" "${authorizedKeysDir}/${uname}" || \
138 log error "Failed to install authorized_keys for '$uname'!"
139 rm -f "${authorizedKeysDir}/${uname}"
140 # indicate that there has been a failure:
144 rm -f "${authorizedKeysDir}/${uname}"
150 # destroy temporary directory