Adding encryption and decryption

README.md

@@ -42,6 +42,17 @@ Converts currency based on realtime exchange rates
 
 </div>
 
+
+## Encryption & Decryption
+
+A wrapper for openssl that allows for quickly encrypting and decrypting files
+
+<div align="center">
+
+<img max-height="500px" max-width="500px" src="https://github.com/alexanderepstein/Bash-Snippets/blob/master/crypt/crypt.png?raw=true">
+
+</div>
+
 #### To Be Added
 [ ] Pass in arguments as well on top of the option to have it guide you through input
 

crypt/crypt

@@ -0,0 +1,41 @@
+#!/bin/bash
+# Author: Alexander Epstein https://github.com/alexanderepstein
+
+encrypt()
+{
+  openssl enc -aes-256-cbc -salt -a -in $1 -out $2 || { echo "File not found"; exit 1; }
+    echo "Successfully encrypted"
+}
+
+decrypt()
+{
+  openssl enc -aes-256-cbc -d -a -in $1 -out $2 || { echo "File not found"; exit 1; }
+  echo "Successfully decrypted"
+}
+
+while getopts ":e:d::" opt; do
+  case $opt in
+    e)
+      if [[ $# -gt 3 ]]; then
+        echo "Option -e only accepts two arguments" <&2
+        exit 1
+      fi
+      encrypt $2 $3
+    ;;
+    \?)
+      echo "Invalid option: -$OPTARG" >&2
+      exit 1
+    ;;
+    d)
+      if [[ $# -gt 3 ]]; then
+        echo "Option -e only accepts two arguments" <&2
+        exit 1
+      fi
+      decrypt $2 $3
+    ;;
+    :)
+      echo "Option -$OPTARG requires an argument." >&2
+      exit 1
+    ;;
+  esac
+done

crypt/install.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+# Author: Alexander Epstein https://github.com/alexanderepstein
+echo -n "Installing crypt: "
+chmod a+x crypt
+cp crypt /usr/local/bin > /dev/null 2>&1 || { echo "Failure"; echo "Error copying file, try running install script as sudo"; exit 1; }
+echo "Success"

crypt/uninstall.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+# Author: Alexander Epstein https://github.com/alexanderepstein
+echo -n "Removing crypt: "
+rm -f /usr/local/bin/crypt > /dev/null 2>&1 || { echo "Failed" ; echo "Error removing file, try running uninstall script as sudo"; exit 1; }
+echo "Success"

install.sh

@@ -1,10 +1,13 @@
 #!/bin/bash
 # Author: Alexander Epstein https://github.com/alexanderepstein
-cd currency
+cd currency || exit 1
 ./install.sh || exit 1
-cd ..
-cd stocks
+cd .. || exit 1
+cd stocks || exit 1
 ./install.sh
-cd ..
-cd weather
+cd .. || exit 1
+cd weather || exit 1
+./install.sh
+cd .. || exit 1
+cd crypt || exit 1
 ./install.sh

uninstall.sh

@@ -1,10 +1,13 @@
 #!/bin/bash
 # Author: Alexander Epstein https://github.com/alexanderepstein
-cd currency
+cd currency || exit 1
 ./uninstall.sh || exit 1
-cd ..
-cd stocks
+cd .. || exit 1
+cd stocks || exit 1
 ./uninstall.sh
-cd ..
-cd weather
+cd .. || exit 1
+cd weather || exit 1
+./uninstall.sh
+cd .. || exit 1
+cd crypt || exit 1
 ./uninstall.sh