bpo-37404: Raising value error if an SSLSocket is passed to asyncio functions (GH-16457)

https://bugs.python.org/issue37404
(cherry picked from commit 892f9e0)

Co-authored-by: idomic <michael.ido@gmail.com>

Author: miss-islington

Diff for: Lib/asyncio/selector_events.py

@@ -345,6 +345,8 @@ async def sock_recv(self, sock, n):
         The maximum amount of data to be received at once is specified by
         nbytes.
         """
+        if isinstance(sock, ssl.SSLSocket):
+            raise TypeError("Socket cannot be of type SSLSocket")
         if self._debug and sock.gettimeout() != 0:
             raise ValueError("the socket must be non-blocking")
         fut = self.create_future()
@@ -378,6 +380,8 @@ async def sock_recv_into(self, sock, buf):
         The received data is written into *buf* (a writable buffer).
         The return value is the number of bytes written.
         """
+        if isinstance(sock, ssl.SSLSocket):
+            raise TypeError("Socket cannot be of type SSLSocket")
         if self._debug and sock.gettimeout() != 0:
             raise ValueError("the socket must be non-blocking")
         fut = self.create_future()
@@ -415,6 +419,8 @@ async def sock_sendall(self, sock, data):
         raised, and there is no way to determine how much data, if any, was
         successfully processed by the receiving end of the connection.
         """
+        if isinstance(sock, ssl.SSLSocket):
+            raise TypeError("Socket cannot be of type SSLSocket")
         if self._debug and sock.gettimeout() != 0:
             raise ValueError("the socket must be non-blocking")
         fut = self.create_future()
@@ -451,6 +457,8 @@ async def sock_connect(self, sock, address):
 
         This method is a coroutine.
         """
+        if isinstance(sock, ssl.SSLSocket):
+            raise TypeError("Socket cannot be of type SSLSocket")
         if self._debug and sock.gettimeout() != 0:
             raise ValueError("the socket must be non-blocking")
 
@@ -508,6 +516,8 @@ async def sock_accept(self, sock):
         object usable to send and receive data on the connection, and address
         is the address bound to the socket on the other end of the connection.
         """
+        if isinstance(sock, ssl.SSLSocket):
+            raise TypeError("Socket cannot be of type SSLSocket")
         if self._debug and sock.gettimeout() != 0:
             raise ValueError("the socket must be non-blocking")
         fut = self.create_future()

Diff for: Misc/NEWS.d/next/Build/2019-12-01-21-45-24.bpo-37404.cNsA7S.rst

@@ -0,0 +1,2 @@
+:mod:`asyncio` now raises :exc:`TyperError` when calling incompatible methods
+with an :class:`ssl.SSLSocket` socket.  Patch by Ido Michael.