src/subcommands/mh/import-key



#!/usr/bin/env bash

# Monkeysphere host import-key subcommand
#
# The monkeysphere scripts are written by:
# Jameson Rollins <jrollins@fifthhorseman.net>
# Jamie McClelland <jm@mayfirst.org>
# Daniel Kahn Gillmor <dkg@fifthhorseman.net>
#
# They are Copyright 2008, and are all released under the GPL, version 3
# or later.

import_key() {

local hostName=$(hostname -f)
local keyFile="/etc/ssh/ssh_host_rsa_key"
local keyExpire
local userID

# check for presense of secret key
# FIXME: is this the proper test to be doing here?
fingerprint_server_key >/dev/null \
    && failure "An OpenPGP host key already exists."

# get options
while true ; do
    case "$1" in
        -f|--keyfile)
        keyFile="$2"
        shift 2
        ;;
        -e|--expire)
        keyExpire="$2"
        shift 2
        ;;
        *)
        if [ "$(echo "$1" | cut -c 1)" = '-' ] ; then
            failure "Unknown option '$1'.
Type '$PGRM help' for usage."
        fi
        hostName="$1"
        shift
        ;;
        break
        ;;
    esac
done

if [ ! -f "$keyFile" ] ; then
    failure "SSH secret key file '$keyFile' not found."
fi

userID="ssh://${hostName}"

# prompt about key expiration if not specified
keyExpire=$(get_gpg_expiration "$keyExpire")

echo "The following key parameters will be used for the host private key:"
echo "Import: $keyFile"
echo "Name-Real: $userID"
echo "Expire-Date: $keyExpire"

read -p "Import key? (Y/n) " OK; OK=${OK:=Y}
if [ ${OK/y/Y} != 'Y' ] ; then
    failure "aborting."
fi

log verbose "importing ssh key..."
# translate ssh key to a private key
(umask 077 && \
    pem2openpgp "$userID" "$keyExpire" < "$sshKey" | gpg_host --import)

# find the key fingerprint of the newly converted key
fingerprint=$(fingerprint_server_key)

# export host ownertrust to authentication keyring
log verbose "setting ultimate owner trust for host key..."
echo "${fingerprint}:6:" | gpg_host "--import-ownertrust"
echo "${fingerprint}:6:" | gpg_authentication "--import-ownertrust"

# export public key to file
gpg_authentication "--export-options export-minimal --armor --export 0x${fingerprint}\!" > "${SYSDATADIR}/ssh_host_rsa_key.pub.gpg"
log info "SSH host public key in OpenPGP form: ${SYSDATADIR}/ssh_host_rsa_key.pub.gpg"

# show info about new key
show_key

}