Populate cert_key_types on OpenSSL.

third_party/tlslite/tlslite/messages.py

 # Authors: 
 #   Trevor Perrin
 #   Google - handling CertificateRequest.certificate_types
 #   Google (adapted by Sam Rushing and Marcelo Fernandez) - NPN support
 #   Dimitris Moraitis - Anon ciphersuites
 #
 # See the LICENSE file for legal information regarding use of this file.
 
 """Classes representing TLS messages."""
 
@@ skipping 436 matching lines @@
 
     def write(self):
         w = Writer()
         w.add(CertificateStatusType.ocsp, 1)
         w.addVarSeq(bytearray(self.ocsp_response), 1, 3)
         return self.postWrite(w)
 
 class CertificateRequest(HandshakeMsg):
     def __init__(self):
         HandshakeMsg.__init__(self, HandshakeType.certificate_request)
-        #Apple's Secure Transport library rejects empty certificate_types, so
-        #default to rsa_sign.
-        self.certificate_types = [ClientCertificateType.rsa_sign]
+        self.certificate_types = []
         self.certificate_authorities = []
 
     def create(self, certificate_types, certificate_authorities):
         self.certificate_types = certificate_types
         self.certificate_authorities = certificate_authorities
         return self
 
     def parse(self, p):
         p.startLengthCheck(3)
         self.certificate_types = p.getVarList(1, 1)
@@ skipping 286 matching lines @@
         newMsg = ApplicationData().create(self.bytes[:1])
         self.bytes = self.bytes[1:]
         return newMsg
 
     def parse(self, p):
         self.bytes = p.bytes
         return self
 
     def write(self):
         return self.bytes