X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;ds=sidebyside;f=src%2Fmonkeysphere;h=8f44bf51ed9cc8e56c0331bfd7d97a1be4dfe9b1;hb=a41b10c287cda37cbb36ae1c56afd1512ea84d00;hp=69741e1c10df0aa177b9b7f903c6ccba8ad14510;hpb=0c2c01095b4e3e707a08e9ff6ebe61f18689bcaa;p=monkeysphere.git

diff --git a/src/monkeysphere b/src/monkeysphere
index 69741e1..8f44bf5 100755
--- a/src/monkeysphere
+++ b/src/monkeysphere
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # monkeysphere: MonkeySphere client tool
 #
@@ -11,196 +11,341 @@
 ########################################################################
 PGRM=$(basename $0)
 
-SHAREDIR=${SHAREDIR:-"/usr/share/monkeysphere"}
-export SHAREDIR
-. "${SHAREDIR}/common"
-
-GLOBAL_CONFIG=${GLOBAL_CONFIG:-"${ETC}/monkeysphere.conf"}
-[ -r "$GLOBAL_CONFIG" ] && . "$GLOBAL_CONFIG"
+SHARE=${MONKEYSPHERE_SHARE:-"/usr/share/monkeysphere"}
+export SHARE
+. "${SHARE}/common" || exit 1
 
 # date in UTF format if needed
 DATE=$(date -u '+%FT%T')
 
 # unset some environment variables that could screw things up
-GREP_OPTIONS=
+unset GREP_OPTIONS
+
+# default return code
+RETURN=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
+usage: $PGRM <subcommand> [options] [args]
+MonkeySphere client tool.
 
 subcommands:
-  update-known_hosts (k) [HOST]...  update known_hosts file
-  update-userids (u) [USERID]...    add/update userid
-  update-authorized_keys (a)        update authorized_keys file
-  gen-ae-subkey (g) KEYID           generate an 'ae' 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)
+   --expire (-e) EXPIRE                date to expire
+ subkey-to-ssh-agent (s)             store authentication subkey in ssh-agent
+ help (h,?)                          this help
 
 EOF
 }
 
-# generate a subkey with the 'a' and 'e' usage flags set
-gen_ae_subkey(){
+# generate a subkey with the 'a' usage flags set
+gen_subkey(){
+    local keyLength
+    local keyExpire
     local keyID
     local gpgOut
     local userID
 
-    log "warning: this function is still not working."
+    # set default key parameter values
+    keyLength=
+    keyExpire=
 
-    keyID="$1"
+    # get options
+    TEMP=$(getopt -o l:e: -l length:,expire: -n "$PGRM" -- "$@")
 
-    # set subkey defaults
-    SUBKEY_TYPE=${KEY_TYPE:-"RSA"}
-    SUBKEY_LENGTH=${KEY_LENGTH:-"1024"}
-    SUBKEY_USAGE=${KEY_USAGE:-"encrypt,auth"}
-
-    gpgOut=$(gpg --fixed-list-mode --list-keys --with-colons \
-	"$keyID" 2> /dev/null)
-
-    # return 1 if there only "tru" lines are output from gpg
-    if [ -z "$(echo "$gpgOut" | grep -v '^tru:')" ] ; then
-	log "  key not found."
-	return 1
+    if [ $? != 0 ] ; then
+	exit 1
     fi
 
-    userID=$(echo "$gpgOut" | grep "^uid:" | cut -d: -f10)
+    # 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
+
+    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."
+	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
 
-    # set key parameters
-    keyParameters=$(cat <<EOF
-Subkey-Type: $SUBKEY_TYPE
-Subkey-Length: $SUBKEY_LENGTH
-Subkey-Usage: $SUBKEY_USAGE
-Name-Real: $userID
-EOF
-)
+    # get key output, and fail if not found
+    gpgOut=$(gpg --quiet --fixed-list-mode --list-secret-keys --with-colons \
+	"$keyID") || failure
 
-    echo "The following key parameters will be used:"
-    echo "$keyParameters"
+    # 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
 
-    read -p "generate key? [Y|n]: " OK; OK=${OK:=Y}
-    if [ ${OK/y/Y} != 'Y' ] ; then
-	failure "aborting."
+    # prompt if an authentication subkey already exists
+    if echo "$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."
+	fi
     fi
 
-    # add commit command
-    keyParameters="${keyParameters}"$(cat <<EOF
+    # 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 ${keyExpire:=0} ; then
+		echo "invalid value"
+		unset keyExpire
+	    fi
+	done
+    elif ! test_gpg_expire "$keyExpire" ; then
+	failure "invalid key expiration value '$keyExpire'."
+    fi
 
-%commit
-%echo done
+    # 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
 )
 
-    echo "generating subkey..."
-    echo "$keyParameters" | gpg --batch --gen-key
+    log "generating subkey..."
+    fifoDir=$(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."
 }
 
-########################################################################
-# MAIN
-########################################################################
+function subkey_to_ssh_agent() {
+    # try to add all authentication subkeys to the agent:
 
-COMMAND="$1"
-[ "$COMMAND" ] || failure "Type '$PGRM help' for usage."
-shift
+    local authsubkeys
+    local secretkeys
+    local subkey
+    local workingdir
+    local kname
 
-# set ms home directory
-MS_HOME=${MS_HOME:-"${HOME}/.config/monkeysphere"}
+    # 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" $1 "!" }')
+    
+    authsubkeys=$(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)
 
-# load configuration file
-MS_CONF=${MS_CONF:-"${MS_HOME}/monkeysphere.conf"}
-[ -e "$MS_CONF" ] && . "$MS_CONF"
+    workingdir=$(mktemp -d)
+    umask 077
+    mkfifo "$workingdir/passphrase"
 
-# set empty config variable with defaults
-AUTHORIZED_USER_IDS=${AUTHORIZED_USER_IDS:-"${MS_HOME}/authorized_user_ids"}
-GNUPGHOME=${GNUPGHOME:-"${HOME}/.gnupg"}
-KEYSERVER=${KEYSERVER:-"subkeys.pgp.net"}
-REQUIRED_KEY_CAPABILITY=${REQUIRED_KEY_CAPABILITY:-"e a"}
-USER_CONTROLLED_AUTHORIZED_KEYS=${USER_CONTROLLED_AUTHORIZED_KEYS:-"%h/.ssh/authorized_keys"}
-USER_KNOWN_HOSTS=${USER_KNOWN_HOSTS:-"${HOME}/.ssh/known_hosts"}
-HASH_KNOWN_HOSTS=${HASH_KNOWN_HOSTS:-"true"}
+    # 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> 
 
-export GNUPGHOME
+    # FIXME: how do we know if we succeeded or failed?  ssh-add gives
+    # weird return values under setsid, and if there are more than one 
 
-# stagging locations
-hostKeysCacheDir="${MS_HOME}/host_keys"
-userKeysCacheDir="${MS_HOME}/user_keys"
-msAuthorizedKeys="${MS_HOME}/authorized_keys"
+    for subkey in $authsubkeys; do 
+	kname="MonkeySphere Key $subkey"
+
+	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 MonkeySphere Key $subkey: " "$workingdir/passphrase"
+	    wait
+	fi
+	rm -f "$workingdir/$kname"
+    done
+
+    rm -rf "$workingdir"
+}
 
-# make sure gpg home exists with proper permissions
+########################################################################
+# MAIN
+########################################################################
+
+# unset variables that should be defined only in config file
+unset KEYSERVER
+unset CHECK_KEYSERVER
+unset KNOWN_HOSTS
+unset HASH_KNOWN_HOSTS
+unset AUTHORIZED_KEYS
+
+# load global config
+[ -r "${ETC}/monkeysphere.conf" ] && . "${ETC}/monkeysphere.conf"
+
+# set monkeysphere home directory
+MONKEYSPHERE_HOME=${MONKEYSPHERE_HOME:="${HOME}/.config/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
+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"}}
+
+# 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
 mkdir -p -m 0700 "$GNUPGHOME"
 
-# make sure the user monkeysphere home directory exists
-mkdir -p -m 0700 "$MS_HOME"
-mkdir -p "$hostKeysCacheDir"
-mkdir -p "$userKeysCacheDir"
+# 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 "$USER_KNOWN_HOSTS"
+	# check permissions on the known_hosts file path
+	if ! check_key_file_permissions "$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 [ "$1" ] ; then
-            for host ; do
-		process_host "$host" "$hostKeysCacheDir"
-	    done
+	    update_known_hosts "$@"
+	    RETURN="$?"
 
-        # otherwise, if no hosts are specified, process every user
+        # 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."
+	    # 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
-	    log "processing known_hosts file..."
-	    process_known_hosts "$USER_KNOWN_HOSTS" "$hostKeysCacheDir"
+
+	    process_known_hosts
+	    RETURN="$?"
 	fi
 	;;
 
     'update-authorized_keys'|'update-authorized-keys'|'a')
 	MODE='authorized_keys'
 
-        # make sure authorized_user_ids file exists
-	if [ ! -s "$AUTHORIZED_USER_IDS" ] ; then
-	    failure "authorized_user_ids file is empty or does not exist."
+	# check permissions on the authorized_user_ids file path
+	if ! check_key_file_permissions "$USER" "$AUTHORIZED_USER_IDS" ; then
+	    failure "Improper permissions on authorized_user_ids file path."
 	fi
 
-	# set user-controlled authorized_keys file path
-	userAuthorizedKeys=${USER_CONTROLLED_AUTHORIZED_KEYS/\%h/"$HOME"}
+	# 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
 
-	# update authorized_keys
-	update_authorized_keys "$msAuthorizedKeys" "$userAuthorizedKeys" "$userKeysCacheDir"
+        # exit if the authorized_user_ids file is empty
+	if [ ! -e "$AUTHORIZED_USER_IDS" ] ; then
+	    log "authorized_user_ids file '$AUTHORIZED_USER_IDS' does not exist."
+	    exit
+	fi
+
+	# process authorized_user_ids file
+	process_authorized_user_ids "$AUTHORIZED_USER_IDS"
+	RETURN="$?"
 	;;
 
-    'update-userids'|'u')
-	if [ -z "$1" ] ; then
-	    failure "you must specify at least one userid."
-	fi
-	for userID ; do
-	    update_userid "$userID" "$userKeysCacheDir"
-	done
+    'gen-subkey'|'g')
+	gen_subkey "$@"
 	;;
 
-    'gen-ae-subkey'|'g')
-	keyID="$1"
-	if [ -z "$keyID" ] ; then
-	    failure "you must specify keyid of primary key."
-	fi
-	gen_ae_subkey "$keyID"
+    'subkey-to-ssh-agent'|'s')
+	subkey_to_ssh_agent "$@"
 	;;
 
-    'help'|'h'|'?')
+    '--help'|'help'|'-h'|'h'|'?')
         usage
         ;;
 
     *)
         failure "Unknown command: '$COMMAND'
-Type 'cereal-admin help' for usage."
+Type '$PGRM help' for usage."
         ;;
 esac
+
+exit "$RETURN"