add validation check for PASSFILE and CHOICE

rofi and bemenu don't prevent garbage input from getting allocated to
the PASSFILE and CHOICE variables. We need to check for the validity of
the user input and fail if needed.

1 files changed, 21 insertions, 3 deletions

diff --git a/tessen b/tessen
index 2d436e7..94f78ec 100755
--- a/tessen
+++ b/tessen
@@ -31,7 +31,7 @@ get_pass_file() {
 
   PASSFILE="$(printf '%s\n' "${tmp_pass_3[@]}" | "${BACKEND[@]}")"
 
-  if [[ -z "$PASSFILE" ]]; then
+  if ! [[ -e "$PASS_STORE/$PASSFILE".gpg ]]; then
     exit 1
   fi
 }
@@ -65,18 +65,36 @@ get_pass_data() {
 
 # get the key that the user chooses to copy
 choice_data_copy() {
+  local ch flag
+  flag=""
+
   CHOICE="$(printf '%s\n' "username" "password" "${!PASSDATA_ARR[@]}" | "${BACKEND[@]}")"
 
-  if [[ -z "$CHOICE" ]]; then
+  for ch in "username" "password" "${!PASSDATA_ARR[@]}"; do
+    if [[ "$CHOICE" == "$ch" ]]; then
+      flag=1
+    fi
+  done
+
+  if [[ "$flag" -ne 1 ]]; then
     exit 1
   fi
 }
 
 # get the key that the user chooses to autotype
 choice_data_autotype() {
+  local ch flag
+  flag=""
+
   CHOICE="$(printf '%s\n' "autotype" "username" "password" "${!PASSDATA_ARR[@]}" | "${BACKEND[@]}")"
 
-  if [[ -z "$CHOICE" ]]; then
+  for ch in "autotype" "username" "password" "${!PASSDATA_ARR[@]}"; do
+    if [[ "$CHOICE" == "$ch" ]]; then
+      flag=1
+    fi
+  done
+
+  if [[ "$flag" -ne 1 ]]; then
     exit 1
   fi
 }