ticket: 6426

Apply revised patch from Apple that ensures that a REJECT token is
sent on error.

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@22178 dc483132-0cff-0310-8789-dd5450dbe970

src/lib/gssapi/spnego/spnego_mech.c

@@ -1248,9 +1248,9 @@ spnego_gss_accept_sec_context(void *ct,
 				 &negState, &return_token);
 	}
 cleanup:
-	if (return_token == INIT_TOKEN_SEND ||
-	    return_token == CONT_TOKEN_SEND) {
-		tmpret = make_spnego_tokenTarg_msg(negState, sc->internal_mech,
+	if (return_token != NO_TOKEN_SEND && return_token != CHECK_MIC) {
+		tmpret = make_spnego_tokenTarg_msg(negState,
+						   sc ? sc->internal_mech : GSS_C_NO_OID,
 						   &mechtok_out, mic_out,
 						   return_token,
 						   output_token);
@@ -2465,6 +2465,8 @@ make_spnego_tokenTarg_msg(OM_uint32 status, gss_OID mech_wanted,
 
 	if (outbuf == GSS_C_NO_BUFFER)
 		return (GSS_S_DEFECTIVE_TOKEN);
+	if (sendtoken == INIT_TOKEN_SEND && mech_wanted == GSS_C_NO_OID)
+	    return (GSS_S_DEFECTIVE_TOKEN);
 
 	outbuf->length = 0;
 	outbuf->value = NULL;