src/zlevis: add main binary w.r.t. issue #2

src/zlevis

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# Exit immediately if a command exits with a non-zero status
+set -e
+
+# Summary of the script's functionality
+summary="A tool that enables automatic decryption of ZFS rpools with TPM2"
+
+# Display summary if requested
+if [ "$1" = "--summary" ]; then
+    echo "$summary"
+    exit 0
+fi
+
+# Display usage information if input is from a terminal
+if [ -t 0 ]; then
+    exec >&2
+    echo "Usage: zlevis {decrypt|encrypt} {pool|*} [options]"
+    exit 2
+fi
+
+case "$1" in
+    decrypt) 
+        case "$2" in 
+            pool) zfs list -Ho tpm:jwe $3 | zlevis-decrypt;;
+            *) zlevis-decrypt $2;;
+        esac
+    ;;
+    encrypt)
+        case "$2" in
+            pool) read -r -d . key || zfs set tpm:jwe=$(printf "%s" "$key" | zlevis-encrypt $4) $3;;
+            *) zlevis-encrypt $2;;
+        esac
+    ;;
+    *) exit 1;;
+esac
+
+# Exit with the status of the last command
+exit $?