X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=src%2Fmonkeysphere-ssh-proxycommand;h=62760929e1861112c3e17c1bf6ea1af9b1cdffc4;hb=5c769e797dc0b867db7d6e19eaf9ca493dc87091;hp=3887e4897d10eca20c7234761ae3e1451238c68c;hpb=62ff87e0328bc1406979656029a5e313839cac35;p=monkeysphere.git

diff --git a/src/monkeysphere-ssh-proxycommand b/src/monkeysphere-ssh-proxycommand
index 3887e48..6276092 100755
--- a/src/monkeysphere-ssh-proxycommand
+++ b/src/monkeysphere-ssh-proxycommand
@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/usr/bin/env bash
 
 # monkeysphere-ssh-proxycommand: MonkeySphere ssh ProxyCommand hook
 #
@@ -13,8 +13,7 @@
 # established.  Can be added to ~/.ssh/config as follows:
 #  ProxyCommand monkeysphere-ssh-proxycommand %h %p
 
-HOST="$1"
-PORT="$2"
+########################################################################
 
 usage() {
 cat <<EOF >&2
@@ -22,33 +21,81 @@ usage: ssh -o ProxyCommand="$(basename $0) %h %p" ...
 EOF
 }
 
-log() {
-    echo "$@" >&2
-}
+########################################################################
+
+# export the monkeysphere log level
+export MONKEYSPHERE_LOG_LEVEL
+
+if [ "$1" = '--no-connect' ] ; then
+    NO_CONNECT='true'
+    shift 1
+fi
+
+HOST="$1"
+PORT="$2"
 
 if [ -z "$HOST" ] ; then
-    log "host must be specified."
+    echo "Host not specified." >&2
     usage
-    exit 1
+    exit 255
 fi
 if [ -z "$PORT" ] ; then
-    log "port must be specified."
-    usage
-    exit 1
+    PORT=22
+fi
+
+# set the host URI
+if [ "$PORT" != '22' ] ; then
+    HOSTP="${HOST}:${PORT}"
+else
+    HOSTP="${HOST}"
 fi
+URI="ssh://${HOSTP}"
 
-# check for the host key in the known_hosts file
-hostKey=$(ssh-keygen -F "$HOST")
+# specify keyserver checking.  the behavior of this proxy command is
+# intentionally different than that of running monkeyesphere normally,
+# and keyserver checking is intentionally done under certain
+# circumstances.  This can be overridden by setting the
+# MONKEYSPHERE_CHECK_KEYSERVER environment variable.
 
-# if the host key is found in the known_hosts file,
-# don't check the keyserver
-if [ "$hostKey" ] ; then
+# if the host is in the gpg keyring...
+if gpg --list-key ="${URI}" 2>&1 >/dev/null ; then
+    # do not check the keyserver
     CHECK_KEYSERVER="false"
+
+# if the host is NOT in the keyring...
+else
+    # if the host key is found in the known_hosts file...
+    # FIXME: this only works for default known_hosts location
+    hostKey=$(ssh-keygen -F "$HOST" 2>/dev/null)
+
+    if [ "$hostKey" ] ; then
+	# do not check the keyserver
+	# FIXME: more nuanced checking should be done here to properly
+	# take into consideration hosts that join monkeysphere by
+	# converting an existing and known ssh key
+	CHECK_KEYSERVER="false"
+
+    # if the host key is not found in the known_hosts file...
+    else
+	# check the keyserver
+	CHECK_KEYSERVER="true"
+    fi
 fi
-export CHECK_KEYSERVER
+# set and export the variable for use by monkeysphere
+MONKEYSPHERE_CHECK_KEYSERVER=${MONKEYSPHERE_CHECK_KEYSERVER:="$CHECK_KEYSERVER"}
+export MONKEYSPHERE_CHECK_KEYSERVER
 
 # update the known_hosts file for the host
-monkeysphere update-known-hosts "$HOST"
+monkeysphere update-known_hosts "$HOSTP"
 
 # exec a netcat passthrough to host for the ssh connection
-exec nc "$HOST" "$PORT"
+if [ -z "$NO_CONNECT" ] ; then
+    if (which nc 2>/dev/null >/dev/null); then
+	exec nc "$HOST" "$PORT"
+    elif (which socat 2>/dev/null >/dev/null); then
+	exec socat STDIO "TCP:$HOST:$PORT"
+    else
+	echo "Neither netcat nor socat found -- could not complete monkeysphere-ssh-proxycommand connection to $HOST:$PORT" >&2
+	exit 255
+    fi
+fi