added decrypt script

decryptKey

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+KEY=$1
+KEYLENGTH=${#KEY}
+TOKEN=$2
+
+if [ "$#" -ne 2 ]; then
+	echo "Usage: ${0} pin \"token\""
+	echo "With:"
+	echo -e "  pin\t\t numeric pin with 1 to 32 numbers"
+	echo -e "  token\t\t the token from Snipe"
+	exit 1
+fi
+if ! [[ $KEY =~ ^[0-9]+$ ]];
+then
+	echo "Invalid key"
+	exit 1
+fi
+
+if [ $KEYLENGTH -gt 32 ]; then
+	echo "Key is too long"
+	exit 1
+fi
+while [ $KEYLENGTH -lt 32 ]
+do
+	KEY="0${KEY}"
+	KEYLENGTH=${#KEY}
+done
+echo -n $TOKEN >/tmp/apitoken_snipe
+K=$(echo -n $KEY | xxd -p -c 100)
+DEC=$(openssl enc -aes-256-ecb -d -in /tmp/apitoken_snipe -K $K -base64 -A)
+echo "$DEC"
+rm /tmp/apitoken_snipe