Implement 8370 message encryption

device.py

@@ -171,12 +171,26 @@ class MiedaDevice(threading.Thread):
 
     def send_message_v3(self, data, msg_type=MSGTYPE_ENCRYPTED_REQUEST):
         data = self._security.encode_8370(data, msg_type)
+
+        print("=== encrypted ===")
+        print(data)
+
         self.send_message_v2(data)
 
     def build_send(self, cmd):
         data = cmd.serialize()
+
+        print("=== data ===")
+        print(data)
+        print
+
         _LOGGER.debug(f"[{self._device_id}] Sending: {cmd}")
         msg = PacketBuilder(self._device_id, data).finalize()
+
+        print("=== msg ===")
+        print(msg)
+        print
+
         self.send_message(msg)
 
     def refresh_status(self, wait_response=False):

midea.py

@@ -71,31 +71,6 @@ async def test():
                     if dev.connect(True):
                         return dev
 
-
-
-t = datetime.datetime.now().strftime("%Y%m%d%H%M%S%f")[:16]
-
-t = "20230929142324212188673"[:16]
-
-print(t)
-
-b = bytearray()
-
-for i in range(0, len(t), 2):
-
-
-    tmp = t[i:i+2]
-    d = int(tmp)
-
-
-    b.insert(0, d)
-
-
-print(b)
-
-b_ref = bytearray([21, 24, 23, 14, 29, 9, 23, 20])
-print(b_ref)
-
 dev = asyncio.run(test())
 
 print(dev)

src/command/request.rs

@@ -6,6 +6,9 @@ pub trait RequestSerializer {
 }
 
 pub struct CommandRequest {
+    #[cfg(debug_assertions)]
+    pub name: &'static str,
+
     command: Command,
 }
 
@@ -19,6 +22,7 @@ impl CommandRequest {
         device_type: u8,
         message_type: MessageType,
         body: Body,
+        #[cfg(debug_assertions)] name: &'static str,
     ) -> Self {
         Self {
             command: Command {
@@ -30,6 +34,8 @@ impl CommandRequest {
                 ),
                 body,
             },
+
+            name,
         }
     }
 
@@ -69,7 +75,9 @@ impl CommandQuerySubtype {
                 0,
                 device_type,
                 MessageType::QuerySubtype,
-                Body::from([0x00; 18].as_slice()),
+                Body::from(([0x00; 18].as_slice(), 0x00)),
+                #[cfg(debug_assertions)]
+                "QuerySubtype",
             ),
         }
     }
@@ -100,7 +108,14 @@ pub struct CommandQueryCustom {
 impl CommandQueryCustom {
     pub fn new(device_type: u8, message_type: MessageType, body: Body) -> Self {
         Self {
-            command: CommandRequest::new(0, device_type, message_type, body),
+            command: CommandRequest::new(
+                0,
+                device_type,
+                message_type,
+                body,
+                #[cfg(debug_assertions)]
+                "QueryCustom",
+            ),
         }
     }
 

src/device.rs

@@ -151,7 +151,7 @@ impl Device {
     }
 
     fn parse_message(&mut self, msg: &[u8]) -> Result<ParseMessage> {
-        let (messages, buffer) = self.security.decode_8370(&self.buffer, msg)?;
+        let (messages, buffer) = self.security.decode_8370([&self.buffer, msg].concat())?;
         self.buffer = buffer;
 
         if messages.is_empty() {
@@ -207,6 +207,12 @@ impl Device {
 
     fn send_message(&self, msg: &[u8]) -> Result<()> {
         let data = self.security.encode_8370(msg, MsgType::ENCRYPTED_REQUEST)?;
+
+        // encrypted
+        let e =  b"\x83p\x00~ fq\xa8\xa9b(\x8c\r,\x96X\xbdT\x1d\x06\xa1/\xb5@\xa2\xeb\x96\x0c\x01s\xf0\x8c\x98ELT\x89\x81\xcc\x9d\xaa\xb6[dq\xcf\x98\xd1s\x8c\x08\x0e\xe6u1D\x80\x17I\xe2\x987s\xbe\xb2\xa9\x13\x86\xce\xb3qq\xfe\xa6\x11\x10\xcfi\xc2\xaeXJH\xb8\xa8\x0b5\x08z\x00\xec\xa2t\x13\xeds\xe7:\x0f\x0eP\xfe\x80w7\xbb\xdf\x0f\x14D\xfd9\xceZ\xda\x1a\xda\xfb\x0b\xe0\x92\xc2D\xb4\xdfWE\x89_\xd9\xd0\xb2\xb6\xd9";
+
+        // assert_eq!(data, e);
+
         self.socket.lock().unwrap().write(&data)?;
 
         Ok(())
@@ -219,6 +225,12 @@ impl Device {
 
     fn build_send(&self, cmd: impl RequestSerializer) -> Result<()> {
         let data = PacketBuilder::builder(self.info.id, cmd).finalize(1);
+
+        // msg
+        let d = b"ZZ\x01\x11X\x00 \x00\x00\x00\x00\x00\x0435\x06\x02\n\x17\x14\x02\x86\x02\x00\x00\x8b\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x17G\x0b\xc3\xe7\r\xaa\xb93\x81r0?\x02s\xf8\x88\xe9G)\xa5\x127\x99\xdd\x8afi\xbd\xf6\xc3\xf5\xf1B\x84\x8a&n\xd9\xdb\xba\xee(\\\'\xb2\x0c\x02";
+
+        // assert_eq!(data, d);
+
         self.send_message(&data)
     }
 }

src/devices/e1.rs

@@ -293,9 +293,14 @@ pub struct CommandE1Base {
 }
 
 impl CommandE1Base {
-    pub fn new(device_protocol_version: u8, message_type: MessageType, body: Body) -> Self {
+    pub fn new(
+        device_protocol_version: u8,
+        message_type: MessageType,
+        body: Body,
+        #[cfg(debug_assertions)] name: &'static str,
+    ) -> Self {
         Self {
-            command: CommandRequest::new(device_protocol_version, 0xE1, message_type, body),
+            command: CommandRequest::new(device_protocol_version, 0xE1, message_type, body, name),
         }
     }
 }
@@ -325,6 +330,8 @@ impl CommandPower {
                 device_protocol_version,
                 MessageType::Set,
                 Body::from(([0x00; 4].as_slice(), 0x08)),
+                #[cfg(debug_assertions)]
+                "Power",
             ),
         }
     }
@@ -361,6 +368,8 @@ impl CommandLock {
                 device_protocol_version,
                 MessageType::Set,
                 Body::from((concat!(vec![0x04], vec![0x00; 36],).as_slice(), 0x08)),
+                #[cfg(debug_assertions)]
+                "Lock",
             ),
         }
     }
@@ -400,6 +409,8 @@ impl CommandStorage {
                     concat!(vec![0x00; 4], vec![0xFF; 6], vec![0x00; 27],).as_slice(),
                     0x81,
                 )),
+                #[cfg(debug_assertions)]
+                "Storage",
             ),
         }
     }
@@ -436,6 +447,8 @@ impl CommandQuery {
                 device_protocol_version,
                 MessageType::Query,
                 Body::from(([].as_slice(), 0x00)),
+                #[cfg(debug_assertions)]
+                "Query",
             ),
         }
     }

src/packet_builder.rs

@@ -63,6 +63,12 @@ impl<S: RequestSerializer> PacketBuilder<S> {
             packet[6] = 0x7b;
         } else {
             let mut data = self.command.serialize();
+
+            // data
+            let d = b"\xaa\x1d\xe1\x00\x00\x00\x00\x00\x00\xa0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00b";
+
+            assert_eq!(data, d);
+
             Security::aes_encrypt(&mut data);
 
             packet.extend(data);

src/security.rs

@@ -74,13 +74,18 @@ impl Security {
         }
     }
 
-    pub fn aes_cbc_encrypt(&self, raw: [u8; 32], key: &[u8; 32]) -> [u8; 32] {
+    pub fn aes_cbc_encrypt(&self, raw: &[u8], key: &[u8; 32]) -> Vec<u8> {
         type Aes256CbcEnc = cbc::Encryptor<aes::Aes256>;
 
+        debug_assert_eq!(raw.len() % key.len(), 0);
+
+        raw.chunks(key.len())
+            .map(|r| {
                 Aes256CbcEnc::new(key.into(), &Self::IV.into())
-            .encrypt_padded_vec_mut::<NoPadding>(&raw)
+                    .encrypt_padded_vec_mut::<NoPadding>(r)
-            .try_into()
+            })
-            .unwrap()
+            .flatten()
+            .collect()
     }
 
     pub fn aes_cbc_decrypt(&self, raw: [u8; 32], key: &[u8; 32]) -> [u8; 32] {
@@ -163,9 +168,7 @@ impl Security {
                 .into_iter()
                 .collect();
 
-            data = self
+            data = self.aes_cbc_encrypt(&data, self.tcp_key.as_ref().unwrap());
-                .aes_cbc_encrypt(data.try_into().unwrap(), self.tcp_key.as_ref().unwrap())
-                .to_vec();
             data.extend(sign);
         }
 
@@ -178,8 +181,70 @@ impl Security {
         lhs
     }
 
-    pub fn decode_8370(&self, buffer: &[u8], msg: &[u8]) -> Result<(Vec<Vec<u8>>, Vec<u8>)> {
+    pub fn decode_8370(&self, mut data: Vec<u8>) -> Result<(Vec<Vec<u8>>, Vec<u8>)> {
-        todo!()
+        if data.len() < 6 {
+            return Ok((Vec::new(), data));
+        }
+
+        let header = data[..6].to_vec();
+
+        if header[0] != 0x83 || header[1] != 0x70 {
+            bail!("no an 8370 message");
+        } else if header[4] != 0x20 {
+            bail!("missing byte 4");
+        }
+
+        let size = u16::from_be_bytes(header[2..4].try_into().unwrap()) as usize + 8;
+
+        let mut leftover = Vec::new();
+
+        if data.len() < size {
+            return Ok((Vec::new(), data.to_vec()));
+        } else if data.len() > size {
+            leftover = data[size..].to_vec();
+            data = data[..size].to_vec();
+        }
+
+        let padding = header[5] >> 4;
+        let msgtype = header[5] & 0xf;
+        data = data[6..].to_vec();
+
+        if msgtype == MsgType::ENCRYPTED_RESPONSE as u8
+            || msgtype == MsgType::ENCRYPTED_REQUEST as u8
+        {
+            let sign = data[(data.len() - 32)..].to_vec();
+            data = data[..(data.len() - 32)].to_vec();
+            data = self
+                .aes_cbc_decrypt(data.try_into().unwrap(), &self.tcp_key.unwrap())
+                .to_vec();
+
+            let compare_sign: Vec<u8> = Sha256::digest(&[header.to_vec(), data.clone()].concat())
+                .into_iter()
+                .collect();
+
+            if sign != compare_sign {
+                bail!("sign does not match");
+            }
+
+            if padding != 0 {
+                data = data[..(data.len() - padding as usize)].to_vec();
+            }
+        }
+
+        self.response_count
+            .store(u16::from_be_bytes(data[..2].try_into().unwrap()), SeqCst);
+
+        data = data[2..].to_vec();
+
+        if leftover.len() > 0 {
+            let (mut packets, incomplete) = self.decode_8370(leftover)?;
+
+            packets.insert(0, data);
+
+            Ok((packets, incomplete))
+        } else {
+            Ok((vec![data], Vec::new()))
+        }
     }
 }