X-Git-Url: https://codewiz.org/gitweb?p=monkeysphere.git;a=blobdiff_plain;f=src%2Fmonkeysphere;h=6db4827c15a5ea8fc9248cf2a4c1e0f9e6cd5d79;hp=8936668c3ccef5d117a35497aedafc54b4b97644;hb=e71c7bb4dff26178f714cd0fcdbb3058effa4066;hpb=75279b87bfa5c9abcc64f0a5ddd4c903e2558f70

diff --git a/src/monkeysphere b/src/monkeysphere
index 8936668..6db4827 100755
--- a/src/monkeysphere
+++ b/src/monkeysphere
@@ -1,29 +1,34 @@
-#!/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}/common" || exit 1
+
+# 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
-RETURN=0
-
 # set the file creation mask to be only owner rw
 umask 077
 
@@ -32,281 +37,145 @@ umask 077
 ########################################################################
 
 usage() {
-    cat <<EOF
+    cat <<EOF >&2
 usage: $PGRM <subcommand> [options] [args]
-MonkeySphere client tool.
+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 authentication subkey
    --length (-l) BITS                  key length in bits (2048)
-   --expire (-e) EXPIRE                date to expire
+ 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
-gen_subkey(){
-    local keyLength
-    local keyExpire
-    local keyID
-    local gpgOut
-    local userID
-
-    # set default key parameter values
-    keyLength=
-    keyExpire=
-
-    # get options
-    TEMP=$(getopt -o l:e: -l length:,expire: -n "$PGRM" -- "$@")
-
-    if [ $? != 0 ] ; then
-	exit 1
-    fi
+# user gpg command to define common options
+gpg_user() {
+    gpg --no-greeting --quiet --no-tty "$@"
+}
 
-    # Note the quotes around `$TEMP': they are essential!
-    eval set -- "$TEMP"
-
-    while true ; do
-	case "$1" in
-	    -l|--length)
-		keyLength="$2"
-		shift 2
-		;;
-	    -e|--expire)
-		keyExpire="$2"
-		shift 2
-		;;
-	    --)
-		shift
-		;;
-            *)
-		break
-		;;
-	esac
-    done
+# take a secret key ID and check that only zero or one ID is provided,
+# and that it corresponds to only a single secret key ID
+check_gpg_sec_key_id() {
+    local gpgSecOut
+
+    case "$#" 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
+}
 
-    if [ -z "$1" ] ; then
-	# find all secret keys
-	keyID=$(gpg --with-colons --list-secret-keys | grep ^sec | cut -f5 -d:)
-	# if multiple sec keys exist, fail
-	if (( $(echo "$keyID" | wc -l) > 1 )) ; then
-	    echo "Multiple secret keys found:"
-	    echo "$keyID"
-	    failure "Please specify which primary key to use."
+# 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)
+
+	# look at keys only
+	if [ "$type" != 'pub' -a "$type" != 'sub' ] ; then
+	    continue
 	fi
-    else
-	keyID="$1"
-    fi
-    if [ -z "$keyID" ] ; then
-	failure "You have no secret key available.  You should create an OpenPGP
-key before joining the monkeysphere. You can do this with:
-   gpg --gen-key"
-    fi
-
-    # get key output, and fail if not found
-    gpgOut=$(gpg --quiet --fixed-list-mode --list-secret-keys --with-colons \
-	"$keyID") || failure
-
-    # fail if multiple sec lines are returned, which means the id
-    # given is not unique
-    if [ $(echo "$gpgOut" | grep '^sec:' | wc -l) -gt '1' ] ; then
-	failure "Key ID '$keyID' is not unique."
-    fi
-
-    # prompt if an authentication subkey already exists
-    if echo "$gpgOut" | egrep "^(sec|ssb):" | 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 [ "${OK/y/Y}" != 'Y' ] ; then
-	    failure "aborting."
+	# check for authentication capability
+	if ! check_capability "$usage" 'a' ; then
+	    continue
 	fi
-    fi
-
-    # set subkey defaults
-    # prompt about key expiration if not specified
-    if [ -z "$keyExpire" ] ; then
-	cat <<EOF
-Please specify how long the key should be valid.
-         0 = key does not expire
-      <n>  = key expires in n days
-      <n>w = key expires in n weeks
-      <n>m = key expires in n months
-      <n>y = key expires in n years
-EOF
-	while [ -z "$keyExpire" ] ; do
-	    read -p "Key is valid for? (0) " keyExpire
-	    if ! test_gpg_expire ${keyExpire:=0} ; then
-		echo "invalid value"
-		unset keyExpire
+	# if authentication key is valid, prompt to continue
+	if [ "$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
-	done
-    elif ! test_gpg_expire "$keyExpire" ; then
-	failure "invalid key expiration value '$keyExpire'."
-    fi
-
-    # generate the list of commands that will be passed to edit-key
-    editCommands=$(cat <<EOF
-addkey
-7
-S
-E
-A
-Q
-$keyLength
-$keyExpire
-save
-EOF
-)
-
-    log "generating subkey..."
-    fifoDir=$(mktemp -d)
-    (umask 077 && mkfifo "$fifoDir/pass")
-    echo "$editCommands" | gpg --passphrase-fd 3 3< "$fifoDir/pass" --expert --command-fd 0 --edit-key "$keyID" &
-
-    passphrase_prompt  "Please enter your passphrase for $keyID: " "$fifoDir/pass"
-
-    rm -rf "$fifoDir"
-    wait
-    log "done."
-}
-
-function subkey_to_ssh_agent() {
-    # try to add all authentication subkeys to the agent:
-
-    local authsubkeys
-    local secretkeys
-    local subkey
-    local workingdir
-    local kname
-    local sshaddresponse
-    local keysuccess
-
-    if ! test_gnu_dummy_s2k_extension ; then
-	failure "Your version of GnuTLS does not seem capable of using with gpg's exported subkeys.
-You may want to consider patching or upgrading.
-
-For more details, see:
- http://lists.gnu.org/archive/html/gnutls-devel/2008-08/msg00005.html"
-    fi
-
-    # if there's no agent running, don't bother:
-    if [ -z "$SSH_AUTH_SOCK" ] || ! which ssh-add >/dev/null ; then
-	failure "No ssh-agent available."
-    fi
-
-    # and if it looks like it's running, but we can't actually talk to
-    # it, bail out:
-    ssh-add -l >/dev/null
-    sshaddresponse="$?"
-    if [ "$sshaddresponse" = "2" ]; then
-	failure "Could not connect to ssh-agent"
-    fi
-    
-    # get list of secret keys (to work around https://bugs.g10code.com/gnupg/issue945):
-    secretkeys=$(gpg --list-secret-keys --with-colons --fixed-list-mode --fingerprint | grep '^fpr:' | cut -f10 -d: | awk '{ print "0x" $1 "!" }')
-
-    if [ -z "$secretkeys" ]; then
-	failure "You have no secret keys in your keyring!
-You might want to run 'gpg --gen-key'."
-    fi
-    
-    authsubkeys=$(gpg --list-secret-keys --with-colons --fixed-list-mode --fingerprint --fingerprint $secretkeys | cut -f1,5,10,12 -d: | grep -A1 '^ssb:[^:]*::[^:]*a[^:]*$' | grep '^fpr::' | cut -f3 -d: | sort -u)
-
-    if [ -z "$authsubkeys" ]; then
-	failure "no authentication-capable subkeys available.
-You might want to 'monkeysphere gen-subkey'"
-    fi
-
-    workingdir=$(mktemp -d)
-    umask 077
-    mkfifo "$workingdir/passphrase"
-    keysuccess=1
-
-    # FIXME: we're currently allowing any other options to get passed
-    # through to ssh-add.  should we limit it to known ones?  For
-    # example: -d or -c and/or -t <lifetime> 
-
-    for subkey in $authsubkeys; do 
-	# choose a label by which this key will be known in the agent:
-	# we are labelling the key by User ID instead of by
-	# fingerprint, but filtering out all / characters to make sure
-	# the filename is legit.
-
-	primaryuid=$(gpg --with-colons --list-key "0x${subkey}!" | grep '^pub:' | cut -f10 -d: | tr -d /)
-
-	#kname="[monkeysphere] $primaryuid"
-	kname="'$primaryuid'"
-
-	if [ "$1" = '-d' ]; then
-	    # we're removing the subkey:
-	    gpg --export "0x${subkey}!" | openpgp2ssh "$subkey" > "$workingdir/$kname"
-	    (cd "$workingdir" && ssh-add -d "$kname")
-	else
-	    # we're adding the subkey:
-	    mkfifo "$workingdir/$kname"
-	    gpg --quiet --passphrase-fd 3 3<"$workingdir/passphrase" \
-		--export-options export-reset-subkey-passwd,export-minimal,no-export-attributes \
-		--export-secret-subkeys "0x${subkey}!" | openpgp2ssh "$subkey" > "$workingdir/$kname" &
-	    (cd "$workingdir" && DISPLAY=nosuchdisplay SSH_ASKPASS=/bin/false ssh-add "$@" "$kname" </dev/null )&
-
-	    passphrase_prompt "Enter passphrase for key for $primaryuid: " "$workingdir/passphrase"
-	    wait %2
 	fi
-	keysuccess="$?"
-
-	rm -f "$workingdir/$kname"
     done
-
-    rm -rf "$workingdir"
-
-    # FIXME: sort out the return values: we're just returning the
-    # success or failure of the final authentication subkey in this
-    # case.  What if earlier ones failed?
-    exit "$keysuccess"
 }
 
 ########################################################################
 # 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"}
-# if keyserver not specified in env or monkeysphere.conf,
-# look in gpg.conf
+[ -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 $2 }')
     fi
 fi
-# if it's still not specified, use the default
-KEYSERVER=${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"}}
+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"}
@@ -317,6 +186,7 @@ REQUIRED_USER_KEY_CAPABILITY=${MONKEYSPHERE_REQUIRED_USER_KEY_CAPABILITY:="a"}
 # permissions
 export GNUPGHOME
 mkdir -p -m 0700 "$GNUPGHOME"
+export LOG_LEVEL
 
 # get subcommand
 COMMAND="$1"
@@ -325,65 +195,53 @@ shift
 
 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"}}
 
-	# check permissions on the known_hosts file path
-	if ! check_key_file_permissions "$USER" "$KNOWN_HOSTS" ; then
-	    failure "Improper permissions on known_hosts file path."
-	fi
-
-        # 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 [ "$1" ] ; then
 	    update_known_hosts "$@"
-	    RETURN="$?"
 
-        # 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
-	    # exit if the known_hosts file does not exist
-	    if [ ! -e "$KNOWN_HOSTS" ] ; then
-		log "known_hosts file '$KNOWN_HOSTS' does not exist."
-		exit
-	    fi
-
 	    process_known_hosts
-	    RETURN="$?"
 	fi
 	;;
 
     'update-authorized_keys'|'update-authorized-keys'|'a')
-	MODE='authorized_keys'
-
-	# check permissions on the authorized_user_ids file path
-	if ! check_key_file_permissions "$USER" "$AUTHORIZED_USER_IDS" ; then
-	    failure "Improper permissions on authorized_user_ids file path."
-	fi
-
-	# check permissions on the authorized_keys file path
-	if ! check_key_file_permissions "$USER" "$AUTHORIZED_KEYS" ; then
-	    failure "Improper permissions on authorized_keys file path."
-	fi
-
-        # exit if the authorized_user_ids file is empty
-	if [ ! -e "$AUTHORIZED_USER_IDS" ] ; then
-	    log "authorized_user_ids file '$AUTHORIZED_USER_IDS' does not exist."
-	    exit
-	fi
+	# whether or not to check keyservers
+	CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
 
 	# process authorized_user_ids file
 	process_authorized_user_ids "$AUTHORIZED_USER_IDS"
-	RETURN="$?"
+	;;
+
+    'import-subkey'|'i')
+	source "${MSHAREDIR}/import_subkey"
+	import_subkey "$@"
 	;;
 
     'gen-subkey'|'g')
+	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'|'help'|'-h'|'h'|'?')
         usage
         ;;
@@ -393,5 +251,3 @@ case $COMMAND in
 Type '$PGRM help' for usage."
         ;;
 esac
-
-exit "$RETURN"