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- # -*-shell-script-*-
- # This should be sourced by bash (though we welcome changes to make it POSIX sh compliant)
- # Monkeysphere authentication setup subcommand
- #
- # The monkeysphere scripts are written by:
- # Jameson Rollins <jrollins@finestructure.net>
- # Jamie McClelland <jm@mayfirst.org>
- # Daniel Kahn Gillmor <dkg@fifthhorseman.net>
- #
- # They are Copyright 2009, and are all released under the GPL,
- # version 3 or later.
- setup() {
- # make all needed directories
- mkdir -p "${MADATADIR}"
- mkdir -p "${MATMPDIR}"
- mkdir -p "${GNUPGHOME_CORE}"
- chmod 700 "${GNUPGHOME_CORE}"
- mkdir -p "${GNUPGHOME_SPHERE}"
- chmod 700 "${GNUPGHOME_SPHERE}"
- mkdir -p "${MADATADIR}"/authorized_keys
- # deliberately replace the config files via truncation
- # FIXME: should we be dumping to tmp files and then moving atomically?
- cat >"${GNUPGHOME_CORE}"/gpg.conf <<EOF
- # Monkeysphere trust core GnuPG configuration
- # This file is maintained by the Monkeysphere software.
- # Edits will be overwritten.
- no-greeting
- list-options show-uid-validity
- EOF
-
- cat >"${GNUPGHOME_SPHERE}"/gpg.conf <<EOF
- # Monkeysphere trust sphere GnuPG configuration
- # This file is maintained by the Monkeysphere software.
- # Edits will be overwritten.
- no-greeting
- primary-keyring ${GNUPGHOME_SPHERE}/pubring.gpg
- list-options show-uid-validity
- EOF
- # make sure the monkeysphere user owns everything in th sphere
- # gnupghome
- chown -R "$MONKEYPSHER_USER" "${GNUPGHOME_SPHERE}"
- chgrp -R "$MONKEYPSHER_USER" "${GNUPGHOME_SPHERE}"
- # get fingerprint of core key. this should be empty on unconfigured systems.
- local CORE_FPR=$(gpg_core --with-colons --fixed-list-mode --fingerprint --list-secret-key | grep ^fpr: | cut -f10 -d: )
- if [ -z "$CORE_FPR" ] ; then
- log info "Setting up Monkeysphere authentication trust core..."
- local CORE_UID=$(printf "Monkeysphere authentication trust core UID (random string: %s)" $(head -c21 </dev/urandom | base64))
-
- local TMPLOC=$(mktemp -d "${MATMPDIR}"/tmp.XXXXXXXXXX) || failure "Could not create temporary directory!"
- # generate the key with ssh-keygen...
- log debug "generating ssh key ($CORE_KEYLENGTH bits)..."
- ssh-keygen -q -b "$CORE_KEYLENGTH" -t rsa -N '' -f "${TMPLOC}/authkey" || failure "Could not generate new key for Monkeysphere authentication trust core"
- # and then translate to openpgp encoding and import
- # FIXME: pem2openpgp currently sets the A flag and a short
- # expiration date. We should set the C flag and no expiration
- # date.
- log debug "converting ssh key to openpgp key and importing into core..."
- < "${TMPLOC}/authkey" pem2openpgp "$CORE_UID" | gpg_core --import || failure "Could not import new key for Monkeysphere authentication trust core"
- # get fingerprint of core key. should definitely not be empty at this point
- log debug "get core key fingerprint..."
- CORE_FPR=$(gpg_core --with-colons --fixed-list-mode --fingerprint --list-secret-key | grep ^fpr: | cut -f10 -d: )
- if [ -z "$CORE_FPR" ] ; then
- failure "Failed to create Monkeysphere authentication trust core!"
- fi
-
- else
- log verbose "This system has already set up the Monkeysphere authentication trust core."
- fi
- # ensure that the authentication sphere checker has absolute ownertrust on the expected key.
- log debug "set ultimate owner trust on core key in gpg_sphere..."
- printf "%s:6:\n" "$CORE_FPR" | gpg_sphere --import-ownertrust
- local ORIG_TRUST
- log debug "check gpg_sphere owner trust set properly..."
- if ORIG_TRUST=$(gpg_sphere --export-ownertrust | grep '^[^#]') ; then
- if [ "${CORE_FPR}:6:" != "$ORIG_TRUST" ] ; then
- failure "Monkeysphere authentication trust sphere should explicitly trust the core. It does not have proper ownertrust settings."
- fi
- else
- failure "Could not get monkeysphere-authentication trust guidelines."
- fi
- # ensure that we're using the extended trust model (1), and that
- # our preferences are reasonable (i.e. 3 marginal OR 1 fully
- # trusted certifications are sufficient to grant full validity.
- log debug "check trust level of core key..."
- if [ "1:3:1" != $(gpg_sphere --with-colons --fixed-list-mode --list-keys | head -n1 | grep ^tru: cut -f3,6,7 -d:) ] ; then
- failure "monkeysphere-authentication does not have the expected trust model settings."
- fi
- }
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