X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fmonkeysphere;h=0726ff94a61fdd492f6475978fec41bee711ba80;hb=fd03070ba488f9be9c479734bea9b0f741350221;hp=da5f406165469e942654c5865a99f66ea80cc3d6;hpb=44dfeaec9209521ca6a65e85c1276bad4bdf5c01;p=monkeysphere.git

diff --git a/src/monkeysphere b/src/monkeysphere
index da5f406..0726ff9 100755
--- a/src/monkeysphere
+++ b/src/monkeysphere
@@ -12,11 +12,14 @@
 # or later.
 
 ########################################################################
+set -e
+
 PGRM=$(basename $0)
 
 SYSSHAREDIR=${MONKEYSPHERE_SYSSHAREDIR:-"/usr/share/monkeysphere"}
 export SYSSHAREDIR
-. "${SYSSHAREDIR}/common" || exit 1
+. "${SYSSHAREDIR}/defaultenv"
+. "${SYSSHAREDIR}/common"
 
 # sharedir for host functions
 MSHAREDIR="${SYSSHAREDIR}/m"
@@ -27,9 +30,6 @@ DATE=$(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
 
@@ -45,70 +45,177 @@ Monkeysphere client tool.
 subcommands:
  update-known_hosts (k) [HOST]...    update known_hosts file
  update-authorized_keys (a)          update authorized_keys file
- import-subkey (i)                   import existing ssh key as gpg subkey
-   --keyfile (-f) FILE                 key file to import
-   --expire (-e) EXPIRE                date to expire
+ 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
+
+ keys-from-userid (u) USERID         output valid keys for user id literal
  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
 }
 
+# user gpg command to define common options
+gpg_user() {
+    gpg --no-greeting --quiet --no-tty "$@"
+}
+
+# output the ssh fingerprint of a gpg key
+gpg_ssh_fingerprint() {
+    keyid="$1"
+    local tmpfile=$(mktemp)
+
+    # trap to remove tmp file if break
+    trap "rm -f $tmpfile" EXIT
+
+    # use temporary file, since ssh-keygen won't accept keys on stdin
+    gpg_user --export "$keyid" | openpgp2ssh "$keyid" >"$tmpfile"
+    ssh-keygen -l -f "$tmpfile" | awk '{ print $1, $2, $4 }'
+
+    # remove the tmp file
+    trap - EXIT
+    rm -rf "$tmpfile"
+}
+
+# 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 "$1" | 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 "$gpgSecOut" | cut -d: -f5
+	    ;;
+	*)
+	    local seckeys=$(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)
+
+	# 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 "${SYSCONFIGDIR}/monkeysphere.conf" ] && . "${SYSCONFIGDIR}/monkeysphere.conf"
+[ -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"} ] && . "$MONKEYSPHERE_CONFIG"
-
-# set empty config variables with ones from the environment, or from
-# config file, or with defaults
-LOG_LEVEL=${MONKEYSPHERE_LOG_LEVEL:=${LOG_LEVEL:="INFO"}}
-GNUPGHOME=${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}
+STRICT_MODES=${MONKEYSPHERE_STRICT_MODES:=$STRICT_MODES}
 
 # 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
+export LOG_PREFIX
 
 # get subcommand
 COMMAND="$1"
@@ -117,53 +224,27 @@ shift
 
 case $COMMAND in
     'update-known_hosts'|'update-known-hosts'|'k')
-	MODE='known_hosts'
-
-	# touch the known_hosts file so that the file permission check
-	# below won't fail upon not finding the file
-	(umask 0022 && touch "$KNOWN_HOSTS")
+	# whether or not to check keyservers
+	CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:=${CHECK_KEYSERVER:="true"}}
 
-	# check permissions on the known_hosts file path
-	check_key_file_permissions "$USER" "$KNOWN_HOSTS" || failure
-
-        # 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 "$KNOWN_HOSTS" ] ; then
-		log error "known_hosts file '$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
-	check_key_file_permissions "$USER" "$AUTHORIZED_USER_IDS" || failure
-
-	# check permissions on the authorized_keys file path
-	check_key_file_permissions "$USER" "$AUTHORIZED_KEYS" || failure
-
-        # exit if the authorized_user_ids file is empty
-	if [ ! -e "$AUTHORIZED_USER_IDS" ] ; then
-	    log error "authorized_user_ids file '$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')
@@ -186,8 +267,16 @@ case $COMMAND in
 	subkey_to_ssh_agent "$@"
 	;;
 
+    'sshfpr'|'f')
+	gpg_ssh_fingerprint "$@"
+	;;
+
+    'keys-from-userid'|'u')
+	keys_from_userid "$@"
+	;;
+
     'version'|'v')
-	echo "$VERSION"
+	version
 	;;
 
     '--help'|'help'|'-h'|'h'|'?')
@@ -199,5 +288,3 @@ case $COMMAND in
 Type '$PGRM help' for usage."
         ;;
 esac
-
-exit "$RETURN"