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 mkdir -p "${MADATADIR}"
17 mkdir -p "${MATMPDIR}"
18 mkdir -p "${GNUPGHOME_CORE}"
19 chmod 700 "${GNUPGHOME_CORE}"
20 mkdir -p "${GNUPGHOME_SPHERE}"
21 chmod 700 "${GNUPGHOME_SPHERE}"
22 mkdir -p "${MADATADIR}"/authorized_keys
24 # deliberately replace the config files via truncation
25 # FIXME: should we be dumping to tmp files and then moving atomically?
26 cat >"${GNUPGHOME_CORE}"/gpg.conf <<EOF
27 # Monkeysphere trust core GnuPG configuration
28 # This file is maintained by the Monkeysphere software.
29 # Edits will be overwritten.
31 list-options show-uid-validity
34 cat >"${GNUPGHOME_SPHERE}"/gpg.conf <<EOF
35 # Monkeysphere trust sphere GnuPG configuration
36 # This file is maintained by the Monkeysphere software.
37 # Edits will be overwritten.
39 primary-keyring ${GNUPGHOME_SPHERE}/pubring.gpg
40 list-options show-uid-validity
43 # make sure the monkeysphere user owns everything in th sphere
45 chown -R "$MONKEYPSHER_USER" "${GNUPGHOME_SPHERE}"
46 chgrp -R "$MONKEYPSHER_USER" "${GNUPGHOME_SPHERE}"
48 # get fingerprint of core key. this should be empty on unconfigured systems.
49 local CORE_FPR=$(gpg_core --with-colons --fixed-list-mode --fingerprint --list-secret-key | grep ^fpr: | cut -f10 -d: )
51 if [ -z "$CORE_FPR" ] ; then
52 log info "Setting up Monkeysphere authentication trust core..."
54 local CORE_UID=$(printf "Monkeysphere authentication trust core UID (random string: %s)" $(head -c21 </dev/urandom | base64))
56 local TMPLOC=$(mktemp -d "${MATMPDIR}"/tmp.XXXXXXXXXX) || failure "Could not create temporary directory!"
58 # generate the key with ssh-keygen...
59 log debug "generating ssh key ($CORE_KEYLENGTH bits)..."
60 ssh-keygen -q -b "$CORE_KEYLENGTH" -t rsa -N '' -f "${TMPLOC}/authkey" || failure "Could not generate new key for Monkeysphere authentication trust core"
61 # and then translate to openpgp encoding and import
62 # FIXME: pem2openpgp currently sets the A flag and a short
63 # expiration date. We should set the C flag and no expiration
65 log debug "converting ssh key to openpgp key and importing into core..."
66 < "${TMPLOC}/authkey" pem2openpgp "$CORE_UID" | gpg_core --import || 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 log debug "get core key fingerprint..."
70 CORE_FPR=$(gpg_core --with-colons --fixed-list-mode --fingerprint --list-secret-key | grep ^fpr: | cut -f10 -d: )
71 if [ -z "$CORE_FPR" ] ; then
72 failure "Failed to create Monkeysphere authentication trust core!"
76 log verbose "This system has already set up the Monkeysphere authentication trust core."
80 # ensure that the authentication sphere checker has absolute ownertrust on the expected key.
81 log debug "set ultimate owner trust on core key in gpg_sphere..."
82 printf "%s:6:\n" "$CORE_FPR" | gpg_sphere --import-ownertrust
84 log debug "check gpg_sphere owner trust set properly..."
85 if ORIG_TRUST=$(gpg_sphere --export-ownertrust | grep '^[^#]') ; then
86 if [ "${CORE_FPR}:6:" != "$ORIG_TRUST" ] ; then
87 failure "Monkeysphere authentication trust sphere should explicitly trust the core. It does not have proper ownertrust settings."
90 failure "Could not get monkeysphere-authentication trust guidelines."
93 # ensure that we're using the extended trust model (1), and that
94 # our preferences are reasonable (i.e. 3 marginal OR 1 fully
95 # trusted certifications are sufficient to grant full validity.
96 log debug "check trust level of core key..."
97 if [ "1:3:1" != $(gpg_sphere --with-colons --fixed-list-mode --list-keys | head -n1 | grep ^tru: cut -f3,6,7 -d:) ] ; then
98 failure "monkeysphere-authentication does not have the expected trust model settings."