Variable name reworking; laid foundation for GPG encryption (instead of OpenSSL)

src/includes/libencryption.sh

@@ -1,8 +1,18 @@
 function encrypt(){
-    openssl enc -aes-256-cbc -salt -in "$TARGET" -out "$NOTE" -pass pass:"$ENC_KEY"
+# This function, given a recipient, $PUBKEY; a file to encrypt, $TARGET; and an
+# output file, "$NOTE", will encrypt $TARGET to $NOTE against $PUBKEY's private
+# GPG key.
+
+gpg -r "$PUBKEY" --encrypt-files "$TARGET" --output "$NOTE"
+
 }
 
 function decrypt(){
-    TARGET="$ROOTDIR"/tmp/"$RANDOM"
-    openssl enc -d -aes-256-cbc -in "$NOTE" -pass pass:"$ENC_KEY" > "$TARGET"
+# This function, given a recipient, $PUBKEY; a file to decrypt, $TARGET; and an
+# output file, "$NOTE", will decrpyt $TARGET to $NOTE against $PUBKEY's private
+# GPG key.
+
+    if [ ! -d "$ROOT_DIR"/tmp ]; then mkdir "$ROOT_DIR"/tmp; fi
+    TARGET="$TMP_DIR/$RANDOM"
+    gpg -d "$NOTE" > "$TARGET"
 }