initial commit

cryptr.bash

@@ -0,0 +1,99 @@
+#!/usr/bin/env bash
+
+###############################################################################
+# Copyright 2017 Justin Keller
+#
+# 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,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+###############################################################################
+
+set -eo pipefail; [[ $TRACE ]] && set -x
+
+readonly VERSION="1.0.0"
+
+cryptr_version() {
+  echo "cryptr $VERSION"
+}
+
+cryptr_info() {
+  cryptr_version
+  echo
+}
+
+cryptr_help() {
+  echo "Usage: cryptr command <command-specific-options>"
+  echo
+  cat<<EOF | column -c2 -t -s,
+  encrypt <file>, Encrypt file
+  decrypt <file.aes>, Decrypt encrypted file
+  help, Displays help
+  version, Displays the current version
+EOF
+  echo
+}
+
+cryptr_encrypt() {
+  local _file="$1"
+  if [[ ! -f "$_file" ]]; then
+    echo "File not found or invalid" 1>&2
+    exit 4
+  fi
+
+  openssl aes-128-cbc -salt -in "$_file" -out "$_file".aes
+}
+
+cryptr_decrypt() {
+local _file="$1"
+  if [[ ! -f "$_file" ]]; then
+    echo "File not found or invalid" 1>&2
+    exit 5
+  fi
+
+  openssl aes-128-cbc -d -salt -in "$_file" -out "${_file%\.aes}"
+}
+
+cryptr_main() {
+  local _command="$1"
+
+  if [[ -z $_command ]]; then
+    cryptr_info
+    cryptr_help
+    exit 0
+  fi
+
+  shift 1
+  case "$_command" in
+    "encrypt")
+      cryptr_encrypt "$@"
+      ;;
+
+    "decrypt")
+      cryptr_decrypt "$@"
+      ;;
+
+    "version")
+      cryptr_version
+      ;;
+
+    "help")
+      cryptr_help
+      ;;
+
+    *)
+      cryptr_help >&2
+      exit 3
+  esac
+}
+
+if [[ "$0" == "$BASH_SOURCE" ]]; then
+  cryptr_main "$@"
+fi