X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fmonkeysphere;h=b10adb7a4231bf5cd214daf269cab2895ed6a623;hb=3c73575de77e8d4d211258641179c71080b56856;hp=a6ca62d7949189104cea0978e814b723b160143e;hpb=c32302172e3533b2170329206ff011d6e3a26a49;p=monkeysphere.git

diff --git a/src/monkeysphere b/src/monkeysphere
index a6ca62d..fd96f45 100755
--- a/src/monkeysphere
+++ b/src/monkeysphere
@@ -1,209 +1,248 @@
-#!/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-userids (u) [USERID]...    add/update user IDs
-  remove-userids (r) [USERID]...    remove user IDs
-  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=$(gpg --fixed-list-mode --list-keys --with-colons \
-	"$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)
 
-    echo "generating subkey..."
-    echo "$editCommands" | gpg --expert --command-fd 0 --edit-key "$keyID"
+	# 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 '$keyID'."
+	    if [ "$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"}
-REQUIRED_HOST_KEY_CAPABILITY=${REQUIRED_HOST_KEY_CAPABILITY:-"e a"}
-REQUIRED_USER_KEY_CAPABILITY=${REQUIRED_USER_KEY_CAPABILITY:-"a"}
-USER_CONTROLLED_AUTHORIZED_KEYS=${USER_CONTROLLED_AUTHORIZED_KEYS:-"${HOME}/.ssh/authorized_keys"}
-USER_KNOWN_HOSTS=${USER_KNOWN_HOSTS:-"${HOME}/.ssh/known_hosts"}
-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=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"}
+
+# export GNUPGHOME and make sure gpg home exists with proper
+# permissions
 export GNUPGHOME
-
-# stagging locations
-hostKeysCacheDir="${MS_HOME}/host_keys"
-userKeysCacheDir="${MS_HOME}/user_keys"
-msAuthorizedKeys="${MS_HOME}/authorized_keys"
-
-# 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 "$MS_HOME"
-mkdir -p "$hostKeysCacheDir"
-mkdir -p "$userKeysCacheDir"
-touch "$AUTHORIZED_USER_IDS"
+# get subcommand
+COMMAND="$1"
+[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
+shift
 
 case $COMMAND in
     'update-known_hosts'|'update-known-hosts'|'k')
-	MODE='known_hosts'
-
-        # touch the known_hosts file to make sure it exists
-	# ssh-keygen complains if it doesn't exist
-	touch "$USER_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 [ "$1" ] ; then
-            for host ; do
-		process_host "$host" "$hostKeysCacheDir"
-	    done
+	    update_known_hosts "$@"
 
-        # otherwise, if no hosts are specified, process every user
-        # 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 "$USER_KNOWN_HOSTS" ] ; then
-		failure "known_hosts file '$USER_KNOWN_HOSTS' is empty."
-	    fi
-	    log "processing known_hosts file..."
-	    process_known_hosts "$hostKeysCacheDir"
+	    process_known_hosts
 	fi
 	;;
 
-    'update-userids'|'update-userid'|'u')
-	if [ -z "$1" ] ; then
-	    failure "you must specify at least one userid."
-	fi
-	for userID ; do
-	    update_userid "$userID" "$userKeysCacheDir"
-	done
-	log "Run the following to update your monkeysphere authorized_keys file:"
-	log "$PGRM update-authorized_keys"
+    'update-authorized_keys'|'update-authorized-keys'|'a')
+	# whether or not to check keyservers
+	CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
+
+	# process authorized_user_ids file
+	process_authorized_user_ids "$AUTHORIZED_USER_IDS"
 	;;
 
-    'remove-userids'|'remove-userid'|'r')
-	if [ -z "$1" ] ; then
-	    failure "you must specify at least one userid."
-	fi
-	for userID ; do
-	    remove_userid "$userID"
-	done
-	log "Run the following to update your monkeysphere authorized_keys file:"
-	log "$PGRM update-authorized_keys"
+    'import-subkey'|'i')
+	source "${MSHAREDIR}/import_subkey"
+	import_subkey "$@"
 	;;
 
-    'update-authorized_keys'|'update-authorized-keys'|'a')
-	MODE='authorized_keys'
+    'gen-subkey'|'g')
+	source "${MSHAREDIR}/gen_subkey"
+	gen_subkey "$@"
+	;;
 
-        # fail if the authorized_user_ids file is empty
-	if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then
-	    failure "$AUTHORIZED_USER_IDS is empty."
-	fi
+    'ssh-proxycommand'|'p')
+	source "${MSHAREDIR}/ssh_proxycommand"
+	ssh_proxycommand "$@"
+	;;
 
-	# update authorized_keys
-	update_authorized_keys "$msAuthorizedKeys" "$USER_CONTROLLED_AUTHORIZED_KEYS" "$userKeysCacheDir"
+    'subkey-to-ssh-agent'|'s')
+	source "${MSHAREDIR}/subkey_to_ssh_agent"
+	subkey_to_ssh_agent "$@"
 	;;
 
-    'gen-subkey'|'g')
-	keyID="$1"
-	if [ -z "$keyID" ] ; then
-	    failure "You must specify the key ID of your primary key."
-	fi
-	gen_subkey "$keyID"
+    'version'|'v')
+	echo "$VERSION"
 	;;
 
-    'help'|'h'|'?')
+    '--help'|'help'|'-h'|'h'|'?')
         usage
         ;;