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# Copyright (C) 2011 by Wayne Walker <wwalker@solid-constructs.com>
#
# Released under one of the versions of the MIT License.
#
# Copyright (C) 2011 by Wayne Walker <wwalker@solid-constructs.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
_LIVE_AGENT_LIST=""
declare -a _LIVE_AGENT_SOCK_LIST
_LIVE_AGENT_SOCK_LIST=()
_debug_print() {
if [[ $_DEBUG -gt 0 ]]
then
printf "%s\n" $1
fi
}
find_all_ssh_agent_sockets() {
_SSH_AGENT_SOCKETS=`find /tmp/ -type s -name agent.\* 2> /dev/null | grep '/tmp/ssh-.*/agent.*'`
_debug_print "$_SSH_AGENT_SOCKETS"
}
find_all_gpg_agent_sockets() {
_GPG_AGENT_SOCKETS=`find /tmp/ -type s -name S.gpg-agent.ssh 2> /dev/null | grep '/tmp/gpg-.*/S.gpg-agent.ssh'`
_debug_print "$_GPG_AGENT_SOCKETS"
}
find_all_gnome_keyring_agent_sockets() {
_GNOME_KEYRING_AGENT_SOCKETS=`find /tmp/ -type s -name ssh 2> /dev/null | grep '/tmp/keyring-.*/ssh$'`
_debug_print "$_GNOME_KEYRING_AGENT_SOCKETS"
}
find_all_osx_keychain_agent_sockets() {
[[ -n "$TMPDIR" ]] || TMPDIR=/tmp
_OSX_KEYCHAIN_AGENT_SOCKETS=`find $TMPDIR/ -type s -regex '.*/ssh-.*/agent..*$' 2> /dev/null`
_debug_print "$_OSX_KEYCHAIN_AGENT_SOCKETS"
}
test_agent_socket() {
local SOCKET=$1
SSH_AUTH_SOCK=$SOCKET ssh-add -l 2> /dev/null > /dev/null
result=$?
_debug_print $result
if [[ $result -eq 0 ]]
then
# contactible and has keys loaded
_KEY_COUNT=`SSH_AUTH_SOCK=$SOCKET ssh-add -l | wc -l | tr -d ' '`
fi
if [[ $result -eq 1 ]]
then
# contactible butno keys loaded
_KEY_COUNT=0
fi
if [[ ( ( $result -eq 0 ) || ( $result -eq 1 ) ) ]]
then
if [[ -n "$_LIVE_AGENT_LIST" ]]
then
_LIVE_AGENT_LIST="${_LIVE_AGENT_LIST} ${SOCKET}:$_KEY_COUNT"
else
_LIVE_AGENT_LIST="${SOCKET}:$_KEY_COUNT"
fi
return 0
fi
return 1
}
find_live_gnome_keyring_agents() {
for i in $_GNOME_KEYRING_AGENT_SOCKETS
do
test_agent_socket $i
done
}
find_live_osx_keychain_agents() {
for i in $_OSX_KEYCHAIN_AGENT_SOCKETS
do
test_agent_socket $i
done
}
find_live_gpg_agents() {
for i in $_GPG_AGENT_SOCKETS
do
test_agent_socket $i
done
}
find_live_ssh_agents() {
for i in $_SSH_AGENT_SOCKETS
do
test_agent_socket $i
done
}
function fingerprints() {
local file="$1"
while read l; do
[[ -n $l && ${l###} = $l ]] && ssh-keygen -l -f /dev/stdin <<<$l
done < $file
}
find_all_agent_sockets() {
_SHOW_IDENTITY=0
if [ "$1" = "-i" ] ; then
_SHOW_IDENTITY=1
fi
_LIVE_AGENT_LIST=
find_all_ssh_agent_sockets
find_all_gpg_agent_sockets
find_all_gnome_keyring_agent_sockets
find_all_osx_keychain_agent_sockets
find_live_ssh_agents
find_live_gpg_agents
find_live_gnome_keyring_agents
find_live_osx_keychain_agents
_debug_print "$_LIVE_AGENT_LIST"
_LIVE_AGENT_LIST=$(echo $_LIVE_AGENT_LIST | tr ' ' '\n' | sort -n -t: -k 2 -k 1 | uniq)
_LIVE_AGENT_SOCK_LIST=()
_debug_print "SORTED: $_LIVE_AGENT_LIST"
if [ -e ~/.ssh/authorized_keys ] ; then
_FINGERPRINTS=$(fingerprints ~/.ssh/authorized_keys)
fi
if [[ $_SHOW_IDENTITY -gt 0 ]]
then
i=0
for a in $_LIVE_AGENT_LIST ; do
sock=${a/:*/}
_LIVE_AGENT_SOCK_LIST[$i]=$sock
# technically we could have multiple keys forwarded
# But I haven't seen anyone do it
akeys=$(SSH_AUTH_SOCK=$sock ssh-add -l)
key_size=$(echo ${akeys} | awk '{print $1}')
fingerprint=$(echo ${akeys} | awk '{print $2}')
remote_name=$(echo ${akeys} | awk '{print $3}')
if [ -e ~/.ssh/authorized_keys ] ; then
authorized_entry=$(fingerprints ~/.ssh/authorized_keys | grep $fingerprint)
fi
comment=$(echo ${authorized_entry} | awk '{print $3,$4,$5,$6,$7}')
printf "export SSH_AUTH_SOCK=%s \t#%i) \t%s\n" "$sock" $((i+1)) "$comment"
i=$((i+1))
done
else
printf "%s\n" "$_LIVE_AGENT_LIST" | sed -e 's/ /\n/g' | sort -n -t: -k 2 -k 1
fi
}
set_ssh_agent_socket() {
if [ "$1" = "-c" -o "$1" = "--choose" ]
then
find_all_agent_sockets -i
if [ -z "$_LIVE_AGENT_LIST" ] ; then
echo "No agents found"
return 1
fi
echo -n "Choose (1-${#_LIVE_AGENT_SOCK_LIST[@]})? "
read choice
if [ -n "$choice" ]
then
n=$((choice-1))
if [ -z "${_LIVE_AGENT_SOCK_LIST[$n]}" ] ; then
echo "Invalid choice"
return 1
fi
echo "Setting export SSH_AUTH_SOCK=${_LIVE_AGENT_SOCK_LIST[$n]}"
export SSH_AUTH_SOCK=${_LIVE_AGENT_SOCK_LIST[$n]}
fi
else
# Choose the first available
SOCK=$(find_all_agent_sockets|tail -n 1|awk -F: '{print $1}')
if [ -z "$SOCK" ] ; then
return 1
fi
export SSH_AUTH_SOCK=$SOCK
fi
# set agent pid
if [ -n "$SSH_AUTH_SOCK" ] ; then
export SSH_AGENT_PID=$((`echo $SSH_AUTH_SOCK | cut -d. -f2` + 1))
fi
return 0
}
ssh-find-agent() {
if [ "$1" = "-c" -o "$1" = "--choose" ]
then
set_ssh_agent_socket -c
return $?
elif [ "$1" = "-a" -o "$1" = "--auto" ]
then
set_ssh_agent_socket
return $?
else
find_all_agent_sockets -i
return 0
fi
}