-#!/bin/bash
+#!/usr/bin/env bash
-# monkeysphere: MonkeySphere client tool
+# monkeysphere: Monkeysphere client tool
#
# The monkeysphere scripts are written by:
# Jameson Rollins <jrollins@fifthhorseman.net>
+# Jamie McClelland <jm@mayfirst.org>
+# Daniel Kahn Gillmor <dkg@fifthhorseman.net>
+# Micah Anderson <micah@riseup.net>
#
-# They are Copyright 2008, and are all released under the GPL, version 3
+# They are Copyright 2008-2009, and are all released under the GPL, version 3
# or later.
########################################################################
+set -e
+
PGRM=$(basename $0)
-SHAREDIR=${SHAREDIR:-"/usr/share/monkeysphere"}
-export SHAREDIR
-. "${SHAREDIR}/common"
+SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"}
+export SYSSHAREDIR
+. "${SYSSHAREDIR}/common" || exit 1
-GLOBAL_CONFIG=${GLOBAL_CONFIG:-"${ETC}/monkeysphere.conf"}
-[ -r "$GLOBAL_CONFIG" ] && . "$GLOBAL_CONFIG"
+# sharedir for host functions
+MSHAREDIR="${SYSSHAREDIR}/m"
-# date in UTF format if needed
+# UTC date in ISO 8601 format if needed
DATE=$(date -u '+%FT%T')
# unset some environment variables that could screw things up
-GREP_OPTIONS=
+unset GREP_OPTIONS
+
+# set the file creation mask to be only owner rw
+umask 077
########################################################################
# FUNCTIONS
########################################################################
usage() {
-cat <<EOF
-usage: $PGRM <subcommand> [args]
-MonkeySphere client tool.
+ cat <<EOF >&2
+usage: $PGRM <subcommand> [options] [args]
+Monkeysphere client tool.
subcommands:
- update-known_hosts (k) [HOST]... update known_hosts file
- update-authorized_keys (a) update authorized_keys file
- gen-subkey (g) KEYID generate an 'a' capable subkey
- help (h,?) this help
+ update-known_hosts (k) [HOST]... update known_hosts file
+ update-authorized_keys (a) update authorized_keys file
+ gen-subkey (g) [KEYID] generate an authentication subkey
+ --length (-l) BITS key length in bits (2048)
+ ssh-proxycommand monkeysphere ssh ProxyCommand
+ subkey-to-ssh-agent (s) store authentication subkey in ssh-agent
+ version (v) show version number
+ help (h,?) this help
EOF
}
-# generate a subkey with the 'a' usage flags set
-# FIXME: this needs some tweaking to clean it up
-gen_subkey(){
- local keyID
- local gpgOut
- local userID
+# user gpg command to define common options
+gpg_user() {
+ gpg --no-greeting --quiet --no-tty "$@"
+}
- keyID="$1"
+# take a secret key ID and check that only zero or one ID is provided,
+# and that it corresponds to only a single secret key ID
+check_gpg_sec_key_id() {
+ local gpgSecOut
+
+ case "$#" in
+ 0)
+ gpgSecOut=$(gpg_user --fixed-list-mode --list-secret-keys --with-colons 2>/dev/null | egrep '^sec:')
+ ;;
+ 1)
+ gpgSecOut=$(gpg_user --fixed-list-mode --list-secret-keys --with-colons "$keyID" | egrep '^sec:') || failure
+ ;;
+ *)
+ failure "You must specify only a single primary key ID."
+ ;;
+ esac
+
+ # check that only a single secret key was found
+ case $(echo "$gpgSecOut" | grep -c '^sec:') in
+ 0)
+ failure "No secret keys found. Create an OpenPGP key with the following command:
+ gpg --gen-key"
+ ;;
+ 1)
+ echo "$gpgSecOut" | cut -d: -f5
+ ;;
+ *)
+ echo "Multiple primary secret keys found:"
+ echo "$gpgSecOut" | cut -d: -f5
+ echo "Please specify which primary key to use."
+ failure
+ ;;
+ esac
+}
- gpgOut=$(gpg --quiet --fixed-list-mode --list-keys --with-colons \
- "$keyID" 2> /dev/null)
+# check that a valid authentication subkey does not already exist
+check_gpg_authentication_subkey() {
+ local keyID
+ local IFS
+ local line
+ local type
+ local validity
+ local usage
- # return 1 if there only "tru" lines are output from gpg
- if [ -z "$(echo "$gpgOut" | grep -v '^tru:')" ] ; then
- failure "Key ID '$keyID' not found."
- fi
+ keyID="$1"
- # set subkey defaults
- SUBKEY_TYPE=${SUBKEY_TYPE:-"RSA"}
- #SUBKEY_LENGTH=${SUBKEY_LENGTH:-"2048"}
- SUBKEY_USAGE=${SUBKEY_USAGE:-"auth"}
- SUBKEY_EXPIRE=${SUBKEY_EXPIRE:-"0"}
- cat <<EOF
-Please specify how long the key should be valid.
- 0 = key does not expire
- <n> = key expires in n days
- <n>w = key expires in n weeks
- <n>m = key expires in n months
- <n>y = key expires in n years
-EOF
- read -p "Key is valid for? ($SUBKEY_EXPIRE) " SUBKEY_EXPIRE; SUBKEY_EXPIRE=${SUBKEY_EXPIRE:-"0"}
-
- # generate the list of commands that will be passed to edit-key
- editCommands=$(cat <<EOF
-addkey
-7
-S
-E
-A
-Q
-$SUBKEY_LENGTH
-$SUBKEY_EXPIRE
-save
-EOF
-)
+ # check that a valid authentication key does not already exist
+ IFS=$'\n'
+ for line in $(gpg_user --fixed-list-mode --list-keys --with-colons "$keyID") ; do
+ type=$(echo "$line" | cut -d: -f1)
+ validity=$(echo "$line" | cut -d: -f2)
+ usage=$(echo "$line" | cut -d: -f12)
- log "generating subkey..."
- echo "$editCommands" | gpg --expert --command-fd 0 --edit-key "$keyID"
- log "done."
+ # look at keys only
+ if [ "$type" != 'pub' -a "$type" != 'sub' ] ; then
+ continue
+ fi
+ # check for authentication capability
+ if ! check_capability "$usage" 'a' ; then
+ continue
+ fi
+ # if authentication key is valid, prompt to continue
+ if [ "$validity" = 'u' ] ; then
+ echo "A valid authentication key already exists for primary key '$keyID'." 1>&2
+ if [ "$PROMPT" = "true" ] ; then
+ read -p "Are you sure you would like to generate another one? (y/N) " OK; OK=${OK:N}
+ if [ "${OK/y/Y}" != 'Y' ] ; then
+ failure "aborting."
+ fi
+ break
+ else
+ failure "aborting."
+ fi
+ fi
+ done
}
########################################################################
# MAIN
########################################################################
-COMMAND="$1"
-[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
-shift
-
-# set ms home directory
-MS_HOME=${MS_HOME:-"${HOME}/.config/monkeysphere"}
-
-# load configuration file
-MS_CONF=${MS_CONF:-"${MS_HOME}/monkeysphere.conf"}
-[ -e "$MS_CONF" ] && . "$MS_CONF"
-
-# set empty config variable with defaults
-AUTHORIZED_USER_IDS=${AUTHORIZED_USER_IDS:-"${MS_HOME}/authorized_user_ids"}
-GNUPGHOME=${GNUPGHOME:-"${HOME}/.gnupg"}
-KEYSERVER=${KEYSERVER:-"subkeys.pgp.net"}
-CHECK_KEYSERVER=${CHECK_KEYSERVER:="true"}
-REQUIRED_HOST_KEY_CAPABILITY=${REQUIRED_HOST_KEY_CAPABILITY:-"a"}
-REQUIRED_USER_KEY_CAPABILITY=${REQUIRED_USER_KEY_CAPABILITY:-"a"}
-KNOWN_HOSTS=${KNOWN_HOSTS:-"${HOME}/.ssh/known_hosts"}
-AUTHORIZED_KEYS=${AUTHORIZED_KEYS:-"${HOME}/.ssh/authorized_keys"}
-HASH_KNOWN_HOSTS=${HASH_KNOWN_HOSTS:-"true"}
-
+# set unset default variables
+GNUPGHOME=${GNUPGHOME:="${HOME}/.gnupg"}
+KNOWN_HOSTS="${HOME}/.ssh/known_hosts"
+HASH_KNOWN_HOSTS="true"
+AUTHORIZED_KEYS="${HOME}/.ssh/authorized_keys"
+
+# unset the check keyserver variable, since that needs to have
+# different defaults for the different functions
+unset CHECK_KEYSERVER
+
+# load global config
+[ -r "${SYSCONFIGDIR}/monkeysphere.conf" ] \
+ && . "${SYSCONFIGDIR}/monkeysphere.conf"
+
+# set monkeysphere home directory
+MONKEYSPHERE_HOME=${MONKEYSPHERE_HOME:="${HOME}/.monkeysphere"}
+mkdir -p -m 0700 "$MONKEYSPHERE_HOME"
+
+# load local config
+[ -e ${MONKEYSPHERE_CONFIG:="${MONKEYSPHERE_HOME}/monkeysphere.conf"} ] \
+ && . "$MONKEYSPHERE_CONFIG"
+
+# set empty config variables with ones from the environment
+GNUPGHOME=${MONKEYSPHERE_GNUPGHOME:=$GNUPGHOME}
+LOG_LEVEL=${MONKEYSPHERE_LOG_LEVEL:=$LOG_LEVEL}
+KEYSERVER=${MONKEYSPHERE_KEYSERVER:=$KEYSERVER}
+# if keyserver not specified in env or conf, then look in gpg.conf
+if [ -z "$KEYSERVER" ] ; then
+ if [ -f "${GNUPGHOME}/gpg.conf" ] ; then
+ KEYSERVER=$(grep -e "^[[:space:]]*keyserver " "${GNUPGHOME}/gpg.conf" | tail -1 | awk '{ print $2 }')
+ fi
+fi
+PROMPT=${MONKEYSPHERE_PROMPT:=$PROMPT}
+KNOWN_HOSTS=${MONKEYSPHERE_KNOWN_HOSTS:=$KNOWN_HOSTS}
+HASH_KNOWN_HOSTS=${MONKEYSPHERE_HASH_KNOWN_HOSTS:=$HASH_KNOWN_HOSTS}
+AUTHORIZED_KEYS=${MONKEYSPHERE_AUTHORIZED_KEYS:=$AUTHORIZED_KEYS}
+
+# other variables not in config file
+AUTHORIZED_USER_IDS=${MONKEYSPHERE_AUTHORIZED_USER_IDS:="${MONKEYSPHERE_HOME}/authorized_user_ids"}
+REQUIRED_HOST_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_HOST_KEY_CAPABILITY:="a"}
+REQUIRED_USER_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"}
+
+# export GNUPGHOME and make sure gpg home exists with proper
+# permissions
export GNUPGHOME
-
-# make sure gpg home exists with proper permissions
mkdir -p -m 0700 "$GNUPGHOME"
+export LOG_LEVEL
-# make sure the user monkeysphere home directory exists
-mkdir -p -m 0700 "$MS_HOME"
-touch "$AUTHORIZED_USER_IDS"
-touch "$AUTHORIZED_KEYS"
+# get subcommand
+COMMAND="$1"
+[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
+shift
case $COMMAND in
'update-known_hosts'|'update-known-hosts'|'k')
- MODE='known_hosts'
-
- # touch the known_hosts file to make sure it exists
- # ssh-keygen complains if it doesn't exist
- touch "$KNOWN_HOSTS"
+ # whether or not to check keyservers
+ CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
- # if hosts are specified on the command line, process just
- # those hosts
+ # if hosts are specified on the command line, process just
+ # those hosts
if [ "$1" ] ; then
- process_hosts_known_hosts "$@"
+ update_known_hosts "$@"
- # otherwise, if no hosts are specified, process every host
- # in the user's known_hosts file
+ # otherwise, if no hosts are specified, process every host
+ # in the user's known_hosts file
else
- if [ ! -s "$KNOWN_HOSTS" ] ; then
- failure "known_hosts file '$KNOWN_HOSTS' is empty."
- fi
- log "processing known_hosts file..."
process_known_hosts
fi
-
- log "known_hosts file updated."
;;
'update-authorized_keys'|'update-authorized-keys'|'a')
- MODE='authorized_keys'
-
- # fail if the authorized_user_ids file is empty
- if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then
- failure "$AUTHORIZED_USER_IDS is empty."
- fi
+ # whether or not to check keyservers
+ CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
# process authorized_user_ids file
- log "processing authorized_user_ids file..."
process_authorized_user_ids "$AUTHORIZED_USER_IDS"
- log "authorized_keys file updated."
+ ;;
+
+ 'import-subkey'|'i')
+ source "${MSHAREDIR}/import_subkey"
+ import_subkey "$@"
;;
'gen-subkey'|'g')
- keyID="$1"
- if [ -z "$keyID" ] ; then
- failure "You must specify the key ID of your primary key."
- fi
- gen_subkey "$keyID"
+ source "${MSHAREDIR}/gen_subkey"
+ gen_subkey "$@"
+ ;;
+
+ 'ssh-proxycommand'|'p')
+ source "${MSHAREDIR}/ssh_proxycommand"
+ ssh_proxycommand "$@"
+ ;;
+
+ 'subkey-to-ssh-agent'|'s')
+ source "${MSHAREDIR}/subkey_to_ssh_agent"
+ subkey_to_ssh_agent "$@"
+ ;;
+
+ 'version'|'v')
+ version
;;
- 'help'|'h'|'?')
+ '--help'|'help'|'-h'|'h'|'?')
usage
;;
projects / monkeysphere.git / blobdiff