X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fmonkeysphere;h=da72c9a1c906a6af9c4ff6457730a07b52645439;hb=189781e00c89227612942ff7dc30eaa756cb78ae;hp=59b7e4a2464746bc4eaf8a6fa5896bade7fe223d;hpb=c8b42c1d77005ab3f41d20cc2524f4307086ec4f;p=monkeysphere.git

diff --git a/src/monkeysphere b/src/monkeysphere
index 59b7e4a..94279f4 100755
--- a/src/monkeysphere
+++ b/src/monkeysphere
@@ -1,249 +1,287 @@
-#!/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)
 
-SHARE=${MONKEYSPHERE_SHARE:-"/usr/share/monkeysphere"}
-export SHARE
-. "${SHARE}/common" || exit 1
+SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"}
+export SYSSHAREDIR
+. "${SYSSHAREDIR}/defaultenv"
+. "${SYSSHAREDIR}/common"
+
+# sharedir for host functions
+MSHAREDIR="${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
 unset GREP_OPTIONS
 
-# default return code
-ERR=0
+# 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
-    -l|--length BITS                  key length in bits (2048)
-    -e|--expire EXPIRE                date to expire
-  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 HOST [PORT]        monkeysphere ssh ProxyCommand
+   --no-connect                        do not make TCP connection to host
+ subkey-to-ssh-agent (s)             store authentication subkey in ssh-agent
+ sshfpr (f) KEYID                    output ssh fingerprint of gpg key
+ 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"
+# output the ssh fingerprint of a gpg key
+gpg_ssh_fingerprint() {
+    keyid="$1"
+    local tmpfile=$(mktemp)
 
-    gpgOut=$(gpg --quiet --fixed-list-mode --list-keys --with-colons \
-	"$keyID" 2> /dev/null)
+    # trap to remove tmp file if break
+    trap "rm -f $tmpfile" EXIT
 
-    # fail if there only "tru" lines are output from gpg, which
-    # indicates the key was not found.
-    if [ -z "$(echo "$gpgOut" | grep -v '^tru:')" ] ; then
-	failure "Key ID '$keyID' not found."
-    fi
+    # use temporary file, since ssh-keygen won't accept keys on stdin
+    gpg_user --export "$keyid" | openpgp2ssh "$keyid" >"$tmpfile"
+    ssh-keygen -l -f "$tmpfile" | awk '{ print $1, $2, $4 }'
 
-    # fail if multiple pub lines are returned, which means the id given
-    # is not unique
-    if [ $(echo "$gpgOut" | grep '^pub:' | wc -l) -gt '1' ] ; then
-	failure "Key ID '$keyID' is not unique."
-    fi
+    # remove the tmp file
+    trap - EXIT
+    rm -rf "$tmpfile"
+}
 
-    # prompt if an authentication subkey already exists
-    if echo "$gpgOut" | egrep "^(pub|sub):" | cut -d: -f 12 | grep -q a ; then
-	echo "An authentication subkey already exists for key '$keyID'."
-	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
-    fi
+# 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
 
-    # set subkey defaults
-    KEY_TYPE="RSA"
-    KEY_LENGTH=${KEY_LENGTH:-}
-    KEY_USAGE="auth"
-    # prompt about key expiration if not specified
-    if [ -z "$KEY_EXPIRE" ] ; then
-	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
-	while [ -z "$KEY_EXPIRE" ] ; do
-	    read -p "Key is valid for? (0) " KEY_EXPIRE
-	    if ! test_gpg_expire ${KEY_EXPIRE:=0} ; then
-		echo "invalid value"
-		unset KEY_EXPIRE
-	    fi
-	done
-    elif ! test_gpg_expire "$KEY_EXPIRE" ; then
-	failure "invalid key expiration value '$KEY_EXPIRE'."
-    fi
+    case "$#" 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 "$1" | egrep '^sec:') || failure
+	    ;;
+	*)
+	    failure "You must specify only a single primary key ID."
+	    ;;
+    esac
 
-    # generate the list of commands that will be passed to edit-key
-    editCommands=$(cat <<EOF
-addkey
-7
-S
-E
-A
-Q
-$KEY_LENGTH
-$KEY_EXPIRE
-save
-EOF
-)
+    # 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 "$gpgSecOut" | cut -d: -f5
+	    ;;
+	*)
+	    local seckeys=$(echo "$gpgSecOut" | cut -d: -f5)
+	    failure "Multiple primary secret keys found:
+$seckeys
+Please specify which primary key to use."
+	    ;;
+    esac
+}
+
+# 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
+
+    keyID="$1"
+
+    # check that a valid authentication key does not already exist
+    IFS=$'\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
+		printf "Are you sure you would like to generate another one? (y/N) " >&2
+		read OK; OK=${OK:N}
+		if [ "${OK/y/Y}" != 'Y' ] ; then
+		    failure "aborting."
+		fi
+		break
+	    else
+		failure "aborting."
+	    fi
+	fi
+    done
 }
 
 ########################################################################
 # MAIN
 ########################################################################
 
-# unset variables that should be defined only in config file
-unset KEYSERVER
+# 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
-unset KNOWN_HOSTS
-unset HASH_KNOWN_HOSTS
-unset AUTHORIZED_KEYS
 
 # load global config
-[ -r "${ETC}/monkeysphere.conf" ] && . "${ETC}/monkeysphere.conf"
+[ -r "${SYSCONFIGDIR}/monkeysphere.conf" ] \
+    && . "${SYSCONFIGDIR}/monkeysphere.conf"
 
 # set monkeysphere home directory
-MONKEYSPHERE_HOME=${MONKEYSPHERE_HOME:="${HOME}/.config/monkeysphere"}
+MONKEYSPHERE_HOME=${MONKEYSPHERE_HOME:="${HOME}/.monkeysphere"}
 mkdir -p -m 0700 "$MONKEYSPHERE_HOME"
 
 # load local config
-[ -e ${MONKEYSPHERE_CONFIG:="${MONKEYSPHERE_HOME}/monkeysphere.conf"} ] && . "$MONKEYSPHERE_CONFIG"
-
-# set empty config variables with ones from the environment, or from
-# config file, or with defaults
-GNUPGHOME=${MONKEYSPHERE_GNUPGHOME:=${GNUPGHOME:="${HOME}/.gnupg"}}
-KEYSERVER=${MONKEYSPHERE_KEYSERVER:=${KEYSERVER:="subkeys.pgp.net"}}
-CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
-KNOWN_HOSTS=${MONKEYSPHERE_KNOWN_HOSTS:=${KNOWN_HOSTS:="${HOME}/.ssh/known_hosts"}}
-HASH_KNOWN_HOSTS=${MONKEYSPHERE_HASH_KNOWN_HOSTS:=${HASH_KNOWN_HOSTS:="true"}}
-AUTHORIZED_KEYS=${MONKEYSPHERE_AUTHORIZED_KEYS:=${AUTHORIZED_KEYS:="${HOME}/.ssh/authorized_keys"}}
+[ -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:=$PROMPT}
+# check the known_hosts file
+if [ "$MONKEYSPHERE_KNOWN_HOSTS" ] ; then
+    if [ -f "$MONKEYSPHERE_KNOWN_HOSTS" ] ; then
+	KNOWN_HOSTS="$MONKEYSPHERE_KNOWN_HOSTS"
+    else
+	failure "specified monkeysphere known_hosts file '$MONKEYSPHERE_KNOWN_HOSTS' does not exist."
+    fi
+fi
+[ -d $(dirname "$KNOWN_HOSTS") ] \
+    || mkdir -m 0700 $(dirname "$KNOWN_HOSTS")
+[ -f "$KNOWN_HOSTS" ] \
+    || touch "$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"}
+# note that only using '=' instead of ':=' tests only if the variable
+# in unset, not if it's "null"
+LOG_PREFIX=${MONKEYSPHERE_LOG_PREFIX='ms: '}
 
 # export GNUPGHOME and make sure gpg home exists with proper
 # permissions
 export GNUPGHOME
 mkdir -p -m 0700 "$GNUPGHOME"
+export LOG_LEVEL
 
 # get subcommand
 COMMAND="$1"
 [ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
 shift
 
-# unset option variables
-unset KEY_LENGTH
-unset KEY_EXPIRE
-
-# get options for key generation and add-certifier functions
-TEMP=$(getopt -o l:e: -l length:,expire: -n "$PGRM" -- "$@")
-
-if [ $? != 0 ] ; then
-    usage
-    exit 1
-fi
-
-# Note the quotes around `$TEMP': they are essential!
-eval set -- "$TEMP"
-
-while true ; do
-    case "$1" in
-	-l|--length)
-	    KEY_LENGTH="$2"
-	    shift 2
-	    ;;
-	-e|--expire)
-	    KEY_EXPIRE="$2"
-	    shift 2
-	    ;;
-	--)
-	    shift
-	    ;;
-        *)
-            break
-            ;;
-    esac
-done
-
 case $COMMAND in
     'update-known_hosts'|'update-known-hosts'|'k')
-	MODE='known_hosts'
+	# whether or not to check keyservers
+	CHECK_KEYSERVER=${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 [ "$1" ] ; then
 	    update_known_hosts "$@"
-	    ERR="$?"
 
-        # 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 or does not exist."
-	    fi
-
 	    process_known_hosts
-	    ERR="$?"
 	fi
 	;;
 
     '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 or does not exist."
-	fi
+	# whether or not to check keyservers
+	CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
 
 	# process authorized_user_ids file
 	process_authorized_user_ids "$AUTHORIZED_USER_IDS"
-	ERR="$?"
+	;;
+
+    '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 "$@"
+	;;
+
+    'sshfpr'|'f')
+	gpg_ssh_fingerprint "$@"
+	;;
+
+    'version'|'v')
+	version
 	;;
 
-    'help'|'h'|'?')
+    '--help'|'help'|'-h'|'h'|'?')
         usage
         ;;
 
@@ -252,5 +290,3 @@ case $COMMAND in
 Type '$PGRM help' for usage."
         ;;
 esac
-
-exit "$ERR"