Index: Lib/ftplib.py
===================================================================
--- Lib/ftplib.py	(revision 79421)
+++ Lib/ftplib.py	(working copy)
@@ -582,6 +582,16 @@
 except ImportError:
     pass
 else:
+    # SSL helper to unwrap the connection reliably.  Issue 8108.
+    # See also: http://marc.info/?l=openssl-users&m=126838806919896
+    def _ssl_unwrap(conn):
+        try:
+            conn.unwrap()
+        except ssl.SSLError, err:
+            if err.args[0] not in (ssl.SSL_ERROR_WANT_READ,
+                                   ssl.SSL_ERROR_WANT_WRITE):
+                raise
+
     class FTP_TLS(FTP):
         '''A FTP subclass which adds TLS support to FTP as described
         in RFC-4217.
@@ -684,7 +694,7 @@
                     callback(data)
                 # shutdown ssl layer
                 if isinstance(conn, ssl.SSLSocket):
-                    conn.unwrap()
+                    _ssl_unwrap(conn)
             finally:
                 conn.close()
             return self.voidresp()
@@ -707,7 +717,7 @@
                     callback(line)
                 # shutdown ssl layer
                 if isinstance(conn, ssl.SSLSocket):
-                    conn.unwrap()
+                    _ssl_unwrap(conn)
             finally:
                 fp.close()
                 conn.close()
@@ -724,7 +734,7 @@
                     if callback: callback(buf)
                 # shutdown ssl layer
                 if isinstance(conn, ssl.SSLSocket):
-                    conn.unwrap()
+                    _ssl_unwrap(conn)
             finally:
                 conn.close()
             return self.voidresp()
@@ -743,7 +753,7 @@
                     if callback: callback(buf)
                 # shutdown ssl layer
                 if isinstance(conn, ssl.SSLSocket):
-                    conn.unwrap()
+                    _ssl_unwrap(conn)
             finally:
                 conn.close()
             return self.voidresp()
Index: Lib/test/test_ftplib.py
===================================================================
--- Lib/test/test_ftplib.py	(revision 79421)
+++ Lib/test/test_ftplib.py	(working copy)
@@ -318,7 +318,19 @@
             try:
                 if isinstance(self.socket, ssl.SSLSocket):
                     if self.socket._sslobj is not None:
-                        self.socket.unwrap()
+                        # Unwrap the connection reliably.  Issue 8108.
+                        # http://marc.info/?l=openssl-users&m=126838806919896
+                        try:
+                            self.socket.unwrap()
+                        except ssl.SSLError, err:
+                            if err.args[0] not in (ssl.SSL_ERROR_WANT_READ,
+                                                   ssl.SSL_ERROR_WANT_WRITE):
+                                raise
+                            # assert err.args[0] == ssl.SSL_ERROR_WANT_READ
+                        except socket.error, err:
+                            # the client dropped the connection
+                            if err.args[0] not in (errno.EPIPE, 0):
+                                raise
             finally:
                 super(SSLConnection, self).close()