Initial commit

lab5-account-manager-security/core/integrity_checker.py

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+import hashlib
+from pathlib import Path
+
+
+class IntegrityChecker:
+    """
+    Класс для проверки целостности файлов по хэш-сумме.
+    """
+
+    def calculate_hash(self, file_path: str) -> str:
+        hasher = hashlib.sha256()
+        with open(file_path, "rb") as f:
+            for chunk in iter(lambda: f.read(4096), b""):
+                hasher.update(chunk)
+        return hasher.hexdigest()
+
+    def save_hash(self, file_path: str, hash_file: str) -> None:
+        file_hash = self.calculate_hash(file_path)
+        Path(hash_file).write_text(file_hash, encoding="utf-8")
+
+    def verify_hash(self, file_path: str, hash_file: str) -> bool:
+        if not Path(hash_file).exists():
+            return False
+        expected = Path(hash_file).read_text(encoding="utf-8").strip()
+        actual = self.calculate_hash(file_path)
+        return expected == actual