2 # This should be sourced by bash (though we welcome changes to make it POSIX sh compliant)
4 # Monkeysphere authentication setup 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 2009, and are all released under the GPL,
15 # make all needed directories
16 log debug "checking authentication directory structure..."
17 mkdir -p "${MADATADIR}"
18 chmod 0750 "${MADATADIR}"
19 chgrp "$MONKEYSPHERE_USER" "${MADATADIR}"
20 mkdir -p "${MATMPDIR}"
21 chmod 0750 "${MATMPDIR}"
22 chgrp "$MONKEYSPHERE_USER" "${MATMPDIR}"
23 mkdir -p "${GNUPGHOME_CORE}"
24 chmod 0700 "${GNUPGHOME_CORE}"
25 mkdir -p "${GNUPGHOME_SPHERE}"
26 chmod 0700 "${GNUPGHOME_SPHERE}"
27 mkdir -p "${SYSDATADIR}"/authorized_keys
29 # deliberately replace the config files via truncation
30 # FIXME: should we be dumping to tmp files and then moving atomically?
31 log debug "writing core gpg.conf..."
32 cat >"${GNUPGHOME_CORE}"/gpg.conf <<EOF
33 # Monkeysphere trust core GnuPG configuration
34 # This file is maintained by the Monkeysphere software.
35 # Edits will be overwritten.
39 log debug "writing sphere gpg.conf..."
40 cat >"${GNUPGHOME_SPHERE}"/gpg.conf <<EOF
41 # Monkeysphere trust sphere GnuPG configuration
42 # This file is maintained by the Monkeysphere software.
43 # Edits will be overwritten.
45 list-options show-uid-validity
48 # make sure the monkeysphere user owns everything in the sphere
50 log debug "fixing sphere gnupg home ownership..."
51 chown "$MONKEYSPHERE_USER:$MONKEYSPHERE_USER" "${GNUPGHOME_SPHERE}" "${GNUPGHOME_SPHERE}"/gpg.conf
53 # get fingerprint of core key. this should be empty on unconfigured systems.
54 local CORE_FPR=$(core_fingerprint)
55 log debug "core fingerprint: $CORE_FPR"
57 if [ -z "$CORE_FPR" ] ; then
58 log info "setting up Monkeysphere authentication trust core..."
60 local CORE_UID=$(printf "Monkeysphere authentication trust core UID (random string: %s)" $(head -c21 </dev/urandom | perl -MMIME::Base64 -ne 'print encode_base64($_)'))
62 log debug "generating monkeysphere authentication trust core key ($CORE_KEYLENGTH bits)..."
63 PEM2OPENPGP_USAGE_FLAGS=certify \
64 PEM2OPENPGP_NEWKEY=$CORE_KEYLENGTH pem2openpgp "$CORE_UID" \
66 || failure "Could not import new key for Monkeysphere authentication trust core"
68 # get fingerprint of core key. should definitely not be empty at this point
69 CORE_FPR=$(core_fingerprint)
70 log debug "core fingerprint: $CORE_FPR"
71 if [ -z "$CORE_FPR" ] ; then
72 failure "Failed to create Monkeysphere authentication trust core!"
76 log verbose "Monkeysphere authentication trust core already exists."
79 # export the core key to the sphere keyring
80 log debug "exporting core pub key to sphere keyring..."
81 gpg_core --export | gpg_sphere "--import"
83 # ensure that the authentication sphere checker has absolute ownertrust on the expected key.
84 log debug "setting ultimate owner trust on core key in gpg_sphere..."
85 printf "%s:6:\n" "$CORE_FPR" | gpg_sphere "--import-ownertrust" 2>&1 | log verbose
86 gpg_sphere "--export-ownertrust" 2>&1 | log debug
88 # check the owner trust
89 log debug "checking gpg_sphere owner trust set properly..."
91 if ORIG_TRUST=$(gpg_sphere "--export-ownertrust" | grep '^[^#]') ; then
92 if [ "${CORE_FPR}:6:" != "$ORIG_TRUST" ] ; then
93 failure "Monkeysphere authentication trust sphere should explicitly trust the core. It does not have proper ownertrust settings."
96 failure "Could not get monkeysphere-authentication trust guidelines."
97 # FIXME: what does this mean? should we suggest how to fix?
100 # ensure that we're using the extended trust model (1), and that
101 # our preferences are reasonable (i.e. 3 marginal OR 1 fully
102 # trusted certifications are sufficient to grant full validity.
103 log debug "checking trust model for authentication ..."
104 local TRUST_MODEL=$(gpg_sphere "--with-colons --fixed-list-mode --list-keys" 2>/dev/null \
105 | head -n1 | grep "^tru:" | cut -d: -f3,6,7)
106 log debug "sphere trust model: $TRUST_MODEL"
107 if [ "$TRUST_MODEL" != '1:3:1' ] ; then
108 failure "monkeysphere-authentication does not have the expected trust model settings."
109 # FIXME: what does this mean? should we suggest how to fix?