Add algorithm parameter (Django 3.1) (#489)

* add algorithm parameter

* add algorithm field

* reformat

Author: okapies

django-stubs/contrib/auth/tokens.pyi

@@ -6,6 +6,7 @@ from django.contrib.auth.base_user import AbstractBaseUser
 class PasswordResetTokenGenerator:
     key_salt: str = ...
     secret: Any = ...
+    algorithm: str = ...
     def make_token(self, user: AbstractBaseUser) -> str: ...
     def check_token(self, user: Optional[AbstractBaseUser], token: Optional[str]) -> bool: ...
     def _make_token_with_timestamp(self, user: AbstractBaseUser, timestamp: int) -> str: ...

django-stubs/core/signing.pyi

@@ -6,7 +6,7 @@ class SignatureExpired(BadSignature): ...
 
 def b64_encode(s: bytes) -> bytes: ...
 def b64_decode(s: bytes) -> bytes: ...
-def base64_hmac(salt: str, value: Union[bytes, str], key: Union[bytes, str]) -> str: ...
+def base64_hmac(salt: str, value: Union[bytes, str], key: Union[bytes, str], algorithm: str = ...) -> str: ...
 def get_cookie_signer(salt: str = ...) -> TimestampSigner: ...
 
 class Serializer(Protocol):
@@ -32,7 +32,14 @@ class Signer:
     key: str = ...
     sep: str = ...
     salt: str = ...
-    def __init__(self, key: Optional[Union[bytes, str]] = ..., sep: str = ..., salt: Optional[str] = ...) -> None: ...
+    algorithm: str = ...
+    def __init__(
+        self,
+        key: Optional[Union[bytes, str]] = ...,
+        sep: str = ...,
+        salt: Optional[str] = ...,
+        algorithm: Optional[str] = ...,
+    ) -> None: ...
     def signature(self, value: Union[bytes, str]) -> str: ...
     def sign(self, value: str) -> str: ...
     def unsign(self, signed_value: str) -> str: ...

django-stubs/utils/crypto.pyi

@@ -3,7 +3,9 @@ from typing import Callable, Optional, Union
 
 using_sysrandom: bool
 
-def salted_hmac(key_salt: str, value: Union[bytes, str], secret: Optional[Union[bytes, str]] = ...) -> HMAC: ...
+def salted_hmac(
+    key_salt: str, value: Union[bytes, str], secret: Optional[Union[bytes, str]] = ..., algorithm: str = ...
+) -> HMAC: ...
 def get_random_string(length: int = ..., allowed_chars: str = ...) -> str: ...
 def constant_time_compare(val1: Union[bytes, str], val2: Union[bytes, str]) -> bool: ...
 def pbkdf2(