added first pubkey automation for yubikey

sshin

@@ -14,6 +14,12 @@ IP_PREFIX="192.168.1."
 [[ $# -le 1 ]] && usage && exit 1
 [[ $1 = "-h" ]] && usage -h && exit 1
 re='^[0-9]+$'
+
+USUAL_PUBKEY=~/.ssh/id_rsa
+YUBIKEY_PUBKEY=~/.ssh/id_ed25519_sk
+
+HOSTS_FILE=~/.local/share/sshin/hosts
+
 command="ssh ${1}@"
 shift
 if [[ $1 =~ $re ]]
@@ -27,5 +33,17 @@ else
 	dport=$(grep $1 $ports_file | awk '{print $NF}')
 	[[ -n $port ]] && command="${command} -D$dport"
 fi
+
+#check if Yubikey is present
+lsusb | grep -q "Yubico" && YUBIKEY_PRESENCE=1 || YUBIKEY_PRESENCE=0
+
+#check if the host you are connecting to has Yubikey support (both client and server need openssh >= 8.2)
+YUBIKEY_SUPPORT=$(cat $HOSTS_FILE | grep $1 | awk '{print $2}')
+[[ $YUBIKEY_SUPPORT = "" ]] && echo "vuoto" && YUBIKEY_SUPPORT=0
+
+
+[[ $YUBIKEY_PRESENCE -eq 1 ]] && [[ $YUBIKEY_SUPPORT -eq 1 ]] && command="${command} -i $YUBIKEY_PUBKEY" || command="${command} -i $USUAL_PUBKEY" 
+
 echo $command
+#echo $YUBIKEY_SUPPORT
 $command