Properly handle alerts from the peer in SSL_read.

third_party/tlslite/tlslite/tlsconnection.py

 # Authors: 
 #   Trevor Perrin
 #   Google - added reqCAs parameter
 #   Google (adapted by Sam Rushing and Marcelo Fernandez) - NPN support
 #   Dimitris Moraitis - Anon ciphersuites
 #   Martin von Loewis - python 3 port
 #   Yngve Pettersen (ported by Paul Sokolovsky) - TLS 1.2
 #
 # See the LICENSE file for legal information regarding use of this file.
 
@@ skipping 1203 matching lines @@
             privateKey=privateKey, reqCert=reqCert,
             sessionCache=sessionCache, settings=settings, 
             reqCAs=reqCAs, reqCertTypes=reqCertTypes,
             tacks=tacks, activationFlags=activationFlags, 
             nextProtos=nextProtos, anon=anon,
             signedCertTimestamps=signedCertTimestamps,
             fallbackSCSV=fallbackSCSV,
             ocspResponse=ocspResponse)
         for result in self._handshakeWrapperAsync(handshaker, checker):
             yield result
+        if settings and settings.alertAfterHandshake:
+            for result in self._sendError(AlertDescription.internal_error,
+                                          "Spurious alert"):
+                yield result
 
 
     def _handshakeServerAsyncHelper(self, verifierDB,
                              certChain, privateKey, reqCert, sessionCache,
                              settings, reqCAs, reqCertTypes,
                              tacks, activationFlags, 
                              nextProtos, anon,
                              signedCertTimestamps, fallbackSCSV,
                              ocspResponse):
 
@@ skipping 727 matching lines @@
             except TLSAlert as alert:
                 if not self.fault:
                     raise
                 if alert.description not in Fault.faultAlerts[self.fault]:
                     raise TLSFaultError(str(alert))
                 else:
                     pass
             except:
                 self._shutdown(False)
                 raise