# -*-shell-script-*- # This should be sourced by bash (though we welcome changes to make it POSIX sh compliant) # Monkeysphere host add-revoker 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 2008-2010, and are all released under the GPL, # version 3 or later. # add a revoker to the host key add_revoker() { local revokerKeyID local keyID local tmpDir local fingerprint local addrevokerCommand # check that key ID or file is specified if [ -z "$1" ] ; then failure "You must specify the key ID of a revoker key, or specify a file to read the key from." fi revokerKeyID="$1" shift keyID=$(check_key_input "$@") # make a temporary directory for storing keys during import, and set # the trap to delete it on exit tmpDir=$(msmktempdir) trap "rm -rf $tmpDir" EXIT # if file is specified if [ -f "$revokerKeyID" -o "$revokerKeyID" = '-' ] ; then # load the key from stdin if [ "$revokerKeyID" = '-' ] ; then # make a temporary file to hold the key from stdin revokerKeyID="$tmpDir"/importkey log verbose "reading revoker key from stdin..." cat > "$revokerKeyID" # load the key from the file elif [ -f "$revokerKeyID" ] ; then log verbose "reading revoker key from file '$revokerKeyID'..." fi # check the key is ok as monkeysphere user before loading log debug "checking keys in file..." fingerprint=$(su_monkeysphere_user \ ". ${SYSSHAREDIR}/list_primary_fingerprints" < "$revokerKeyID") if [ $(printf "%s" "$fingerprint" | egrep -c '^[A-F0-9]{40}$') -ne 1 ] ; then failure "There was not exactly one gpg key in the file." fi # load the key gpg_host --import <"$revokerKeyID" \ || failure "could not read revoker key from '$revokerKeyID'" # else, get the revoker key from the keyserver else # fix permissions and ownership on temporary directory which will # be used by monkeysphere user for storing the downloaded key chmod 0700 "$tmpDir" chown "$MONKEYSPHERE_USER":"$MONKEYSPHERE_GROUP" "$tmpDir" # download the key from the keyserver as the monkeysphere user log verbose "searching keyserver $KEYSERVER for revoker keyID $revokerKeyID..." su_monkeysphere_user "GNUPGHOME=$tmpDir gpg --quiet --keyserver $KEYSERVER --recv-key 0x${revokerKeyID}!" \ || failure "Could not receive a key with this ID from keyserver '$KEYSERVER'." # get the full fingerprint of new revoker key log debug "getting fingerprint of revoker key..." fingerprint=$(su_monkeysphere_user "GNUPGHOME=$tmpDir gpg --list-key --with-colons --with-fingerprint ${revokerKeyID}" \ | grep '^fpr:' | cut -d: -f10) # test that there is only a single fingerprint if (( $(echo "$fingerprint" | wc -l) != 1 )) ; then cat <<EOF More than one fingerprint found: $fingerprint Please use a more specific key ID. EOF failure fi log info "revoker key found:" su_monkeysphere_user "GNUPGHOME=$tmpDir gpg --fingerprint 0x${fingerprint}!" if [ "$PROMPT" = "true" ] ; then printf "Are you sure you want to add the above key as a revoker\nof the key '$keyID'? (Y/n) " >&2 read OK; OK=${OK:-Y} if [ "${OK/y/Y}" != 'Y' ] ; then failure "revoker not added." fi else log debug "adding revoker without prompting." fi # export the new key to the host keyring log debug "loading revoker key into host keyring..." su_monkeysphere_user "GNUPGHOME=$tmpDir gpg --quiet --export 0x${fingerprint}!" \ | gpg_host --import fi # edit-key script to add revoker addrevokerCommand="addrevoker $fingerprint y save " # end script # core ltsigns the newly imported revoker key log debug "executing add revoker script..." if echo "$addrevokerCommand" | gpg_host_edit "0x${keyID}!" ; then update_pgp_pub_file log info "Revoker added." else failure "Problem adding revoker." fi # remove the temporary directory trap - EXIT rm -rf "$tmpDir" }