diff --git a/st_eur.sha1 b/st_eur.sha1
new file mode 100644
index 00000000..10822861
--- /dev/null
+++ b/st_eur.sha1
@@ -0,0 +1 @@
+4c950473fa0694cea04eed517e05631f529b35ed  st_eur.nds
diff --git a/st_jp.sha1 b/st_jp.sha1
new file mode 100644
index 00000000..e56aee2f
--- /dev/null
+++ b/st_jp.sha1
@@ -0,0 +1 @@
+eaee3602b8a2235211b2e20cdcd4cb357956a264  st_jp.nds
diff --git a/tools/sha1.py b/tools/sha1.py
new file mode 100644
index 00000000..8cd6edd8
--- /dev/null
+++ b/tools/sha1.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python
+
+from pathlib import Path
+import argparse
+import hashlib
+import sys
+
+def eprint(*args, **kwargs):
+    print(*args, file=sys.stderr, **kwargs)
+
+parser = argparse.ArgumentParser(description="Computes and verifies a SHA1 checksum")
+parser.add_argument('file', help="Input file to verify")
+parser.add_argument('-c', type=str, dest='checksum_file', required=False, help='Checksum file')
+args = parser.parse_args()
+
+file_path = Path(args.file)
+checksum_path = Path(args.checksum_file)
+
+with checksum_path.open('r') as file:
+    target_sha1, _ = file.readline().split(' ', 1)
+
+with file_path.open('rb') as file:
+    file_sha1 = hashlib.sha1(file.read()).hexdigest()
+
+if target_sha1 != file_sha1:
+    eprint(f"{file_path}: FAILED")
+    exit(1)
+else:
+    eprint(f"{file_path}: OK")