updated IS codes

IS/Lab/Lab5/socket/clienthash.py

@@ -0,0 +1,29 @@
+import socket
+import hashlib
+
+
+def main() -> None:
+    host = "127.0.0.1"
+    port = 5001
+
+    message = b"hello integrity"
+    tamper = False  # change to True to simulate corruption
+
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+        s.connect((host, port))
+        send_data = message if not tamper else message[:-1] + b"X"
+        s.sendall(send_data)
+
+        server_digest = s.recv(128).decode()
+        local_digest = hashlib.sha256(message).hexdigest()
+
+        ok = (server_digest == local_digest)
+        print("server:", server_digest)
+        print("local :", local_digest)
+        print("match :", ok)
+
+
+if __name__ == "__main__":
+    main()
+
+