use login5 authentication instead of keymaster

fixes #306

Author: Googolplexed0

librespot/core.py

@@ -29,7 +29,7 @@
 from Cryptodome.PublicKey import RSA
 from Cryptodome.Signature import PKCS1_v1_5
 
-from librespot import util, oauth
+from librespot import util
 from librespot import Version
 from librespot.audio import AudioKeyManager
 from librespot.audio import CdnManager
@@ -57,6 +57,8 @@
 from librespot.proto import Metadata_pb2 as Metadata
 from librespot.proto import Playlist4External_pb2 as Playlist4External
 from librespot.proto.ExplicitContentPubsub_pb2 import UserAttributesUpdate
+from librespot.proto.spotify.login5.v3 import Login5_pb2 as Login5
+from librespot.proto.spotify.login5.v3.credentials import Credentials_pb2 as Login5Credentials
 from librespot.structure import Closeable
 from librespot.structure import MessageListener
 from librespot.structure import RequestListener
@@ -908,6 +910,8 @@ class Session(Closeable, MessageListener, SubListener):
     __dealer_client: typing.Union[DealerClient, None] = None
     __event_service: typing.Union[EventService, None] = None
     __keys: DiffieHellman
+    __login5_access_token: typing.Union[str, None] = None
+    __login5_token_expiry: typing.Union[int, None] = None
     __mercury_client: MercuryClient
     __receiver: typing.Union[Receiver, None] = None
     __search: typing.Union[SearchManager, None]
@@ -968,6 +972,7 @@ def authenticate(self,
 
         """
         self.__authenticate_partial(credential, False)
+        self.__authenticate_login5()
         with self.__auth_lock:
             self.__mercury_client = MercuryClient(self)
             self.__token_provider = TokenProvider(self)
@@ -1203,6 +1208,13 @@ def is_valid(self) -> bool:
         self.__wait_auth_lock()
         return self.__ap_welcome is not None and self.connection is not None
 
+    def login5(self) -> tuple[str, int]:
+        """ """
+        self.__wait_auth_lock()
+        if self.__login5_access_token is None or self.__login5_token_expiry is None:
+            raise RuntimeError("Session isn't authenticated!")
+        return self.__login5_access_token, self.__login5_token_expiry
+
     def mercury(self) -> MercuryClient:
         """ """
         self.__wait_auth_lock()
@@ -1382,6 +1394,43 @@ def __authenticate_partial(self,
         else:
             raise RuntimeError("Unknown CMD 0x" + packet.cmd.hex())
 
+    def __authenticate_login5(self) -> None:
+        """Authenticate using Login5 to get access token"""
+        login5_request = Login5.LoginRequest()
+        login5_request.client_info.client_id = MercuryRequests.keymaster_client_id
+        login5_request.client_info.device_id = self.__inner.device_id
+        
+        # Set stored credential from APWelcome
+        if hasattr(self, '_Session__ap_welcome') and self.__ap_welcome:
+            stored_cred = Login5Credentials.StoredCredential()
+            stored_cred.username = self.__ap_welcome.canonical_username
+            stored_cred.data = self.__ap_welcome.reusable_auth_credentials
+            login5_request.stored_credential.CopyFrom(stored_cred)
+            
+            response = requests.post(
+                "https://login5.spotify.com/v3/login",
+                data=login5_request.SerializeToString(),
+                headers={
+                "Content-Type": "application/x-protobuf",
+                "Accept": "application/x-protobuf"
+                }
+            )
+            
+            if response.status_code == 200:
+                login5_response = Login5.LoginResponse()
+                login5_response.ParseFromString(response.content)
+                
+                if login5_response.HasField('ok'):
+                    self.__login5_access_token = login5_response.ok.access_token
+                    self.__login5_token_expiry = int(time.time()) + login5_response.ok.access_token_expires_in
+                    self.logger.info("Login5 authentication successful, got access token")
+                else:
+                    self.logger.warning("Login5 authentication failed: {}".format(login5_response.error))
+            else:
+                self.logger.warning("Login5 request failed with status: {}".format(response.status_code))
+        else:
+            self.logger.error("Login5 authentication failed: No APWelcome found")
+    
     def __send_unchecked(self, cmd: bytes, payload: bytes) -> None:
         self.cipher_pair.send_encoded(self.connection, cmd, payload)
 
@@ -2258,7 +2307,7 @@ class TokenProvider:
     __tokens: typing.List[StoredToken] = []
 
     def __init__(self, session: Session):
-        self._session = session
+        self.__session = session
 
     def find_token_with_all_scopes(
             self, scopes: typing.List[str]) -> typing.Union[StoredToken, None]:
@@ -2289,24 +2338,27 @@ def get_token(self, *scopes) -> StoredToken:
         scopes = list(scopes)
         if len(scopes) == 0:
             raise RuntimeError("The token doesn't have any scope")
+
         token = self.find_token_with_all_scopes(scopes)
         if token is not None:
             if token.expired():
                 self.__tokens.remove(token)
             else:
                 return token
-        self.logger.debug(
-            "Token expired or not suitable, requesting again. scopes: {}, old_token: {}"
-            .format(scopes, token))
-        response = self._session.mercury().send_sync_json(
-            MercuryRequests.request_token(self._session.device_id(),
-                                          ",".join(scopes)))
-        token = TokenProvider.StoredToken(response)
-        self.logger.debug(
-            "Updated token successfully! scopes: {}, new_token: {}".format(
-                scopes, token))
-        self.__tokens.append(token)
-        return token
+
+        login5_token = None
+        login5_access_token, login5_token_expiry = self.__session.login5()
+        if int(time.time()) < login5_token_expiry - 60:  # 60 second buffer
+            login5_token = TokenProvider.StoredToken({
+                "expiresIn": login5_token_expiry - int(time.time()),
+                "accessToken": login5_access_token,
+                "scope": scopes
+            })
+            self.__tokens.append(login5_token)
+            self.logger.debug("Using Login5 access token for scopes: {}".format(scopes))
+        else:
+            self.logger.debug("Login5 token expired, need to re-authenticate")
+        return login5_token
 
     class StoredToken:
         """ """