From 7dfdea2395a77695ec525e82437bec2422de513d Mon Sep 17 00:00:00 2001
From: Mark Qvist <bc7291552be7a58f361522990465165c>
Date: Thu, 21 May 2026 17:16:31 +0200
Subject: [PATCH] Raise descriptive error if hashlib.file_digest is not
 available.

---
 RNS/Cryptography/Hashes.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/RNS/Cryptography/Hashes.py b/RNS/Cryptography/Hashes.py
index a96c8e1d..87cda589 100644
--- a/RNS/Cryptography/Hashes.py
+++ b/RNS/Cryptography/Hashes.py
@@ -65,4 +65,6 @@ def sha512(data):
 
 def file_sha256(file):
     if not hashlib: raise SystemError("The hashlib module is not available on this system")
+    # TODO: Could implement fallback for old snakes here
+    if not hasattr(hashlib, "file_digest"): raise SystemError("The file_digest method is not available on this system. This functionality requires Python 3.11 or later.")
     else: return hashlib.file_digest(file, "sha256").digest()