add encription shell file

tidb_encryption.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+# Copyright 2021 PingCAP, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script is used to encrypt the compress.
+
+printFunc(){
+  echo -e "Usage:\n"
+	echo -e "\t -e file/dir --- [compressing and encrypting]\n"
+	echo -e "\t -u file ------- [uncompressing and unencrypting]\n"
+	exit 0;
+}
+
+if [ $# -eq 2 ]; then
+	echo ""
+else
+  printFunc
+fi
+
+opt=0
+case "$1" in
+  -e)
+    echo -e "Found -e option \n"
+    opt=1
+    ;;
+  -u)
+    echo -e "Found -u option \n"
+    opt=2
+    ;;
+  *)
+    echo -e "$1 is not the option \n"
+    printFunc
+    ;;
+esac
+shift
+
+type tar >/dev/null 2>&1 || { echo >&2 "Cmd tar is required but it's not installed.  Aborting."; exit 1; }
+type openssl >/dev/null 2>&1 || { echo >&2 "Cmd openssl is required but it's not installed.  Aborting."; exit 1; }
+
+if [ -e $1 ]; then
+  echo ""
+else
+  printFunc
+fi
+
+backup_file=$1
+
+if [ $opt -eq 1 ]; then
+  echo "compressing and encrypting"
+  tar -czvf - $backup_file | openssl enc -e -aes256 -out backup.tar.gz
+else
+  echo "uncompressing and unencrypting"
+  openssl aes256 -d -in $backup_file | tar xzvf -
+fi