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 "$MONKEYSPHERE_GROUP" "${MADATADIR}"
20 mkdir -p "${MATMPDIR}"
21 chmod 0750 "${MATMPDIR}"
22 chgrp "$MONKEYSPHERE_GROUP" "${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 >"${GNUPGHOME_SPHERE}"/gpg.conf <<EOF
41 # Monkeysphere trust sphere GnuPG configuration
42 # This file is maintained by the Monkeysphere software.
43 # Edits will be overwritten.
45 list-options show-uid-validity
46 keyserver-options ca-cert-file=${SYSCONFIGDIR}/monkeysphere-authentication-x509-anchors.crt
49 # make sure the monkeysphere user owns everything in the sphere
51 log debug "fixing sphere gnupg home ownership..."
52 chown "$MONKEYSPHERE_USER:$MONKEYSPHERE_GROUP" "${GNUPGHOME_SPHERE}" "${GNUPGHOME_SPHERE}"/gpg.conf
54 # get fingerprint of core key. this should be empty on unconfigured systems.
55 local CORE_FPR=$(core_fingerprint)
56 log debug "core fingerprint: $CORE_FPR"
58 if [ -z "$CORE_FPR" ] ; then
59 log info "setting up Monkeysphere authentication trust core..."
61 local CORE_UID=$(printf "Monkeysphere authentication trust core UID (random string: %s)" $(dd if=/dev/urandom bs=21 count=1 2>/dev/null | perl -MMIME::Base64 -ne 'print encode_base64($_)'))
63 printf "generating monkeysphere authentication trust core key:\nsize: %d bits\nuid: '%s'\n" "$CORE_KEYLENGTH" "$CORE_UID" | log debug
64 PEM2OPENPGP_USAGE_FLAGS=certify \
65 PEM2OPENPGP_NEWKEY=$CORE_KEYLENGTH pem2openpgp "$CORE_UID" \
67 || failure "Could not import new key for Monkeysphere authentication trust core"
69 # get fingerprint of core key. should definitely not be empty at this point
70 CORE_FPR=$(core_fingerprint)
71 log debug "core fingerprint: $CORE_FPR"
72 if [ -z "$CORE_FPR" ] ; then
73 failure "Failed to create Monkeysphere authentication trust core!"
77 log verbose "Monkeysphere authentication trust core already exists."
80 # export the core key to the sphere keyring
81 log debug "exporting core pub key to sphere keyring..."
82 gpg_core --export | gpg_sphere "--import"
84 # ensure that the authentication sphere checker has absolute ownertrust on the expected key.
85 log debug "setting ultimate owner trust on core key in gpg_sphere..."
86 printf "%s:6:\n" "$CORE_FPR" | gpg_sphere "--import-ownertrust" 2>&1 | log verbose
87 gpg_sphere "--export-ownertrust" 2>&1 | log debug
89 # check the owner trust
90 log debug "checking gpg_sphere owner trust set properly..."
92 if ORIG_TRUST=$(gpg_sphere "--export-ownertrust" | grep '^[^#]') ; then
93 if [ "${CORE_FPR}:6:" != "$ORIG_TRUST" ] ; then
94 failure "Monkeysphere authentication trust sphere should explicitly trust the core. It does not have proper ownertrust settings."
97 failure "Could not get monkeysphere-authentication trust guidelines."
98 # FIXME: what does this mean? should we suggest how to fix?
101 # ensure that we're using the extended trust model (1), and that
102 # our preferences are reasonable (i.e. 3 marginal OR 1 fully
103 # trusted certifications are sufficient to grant full validity.
104 log debug "checking trust model for authentication ..."
105 local TRUST_MODEL=$(gpg_sphere "--with-colons --fixed-list-mode --list-keys" 2>/dev/null \
106 | head -n1 | grep "^tru:" | cut -d: -f3,6,7)
107 log debug "sphere trust model: $TRUST_MODEL"
108 if [ "$TRUST_MODEL" != '1:3:1' ] ; then
109 failure "monkeysphere-authentication does not have the expected trust model settings."
110 # FIXME: what does this mean? should we suggest how to fix?