CryptoPkg: Add Null instance of the TlsLib class

https://bugzilla.tianocore.org/show_bug.cgi?id=2258

Add a Null instance of the TlsLib class.  This lib instance
can be used as a template for new implementations of the TlsLib
class and can also be used to reduce CI build times for build
checks that depend on the TlsLib class.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Xiaoyu Lu <xiaoyux.lu@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>

CryptoPkg/Library/TlsLibNull/TlsInitNull.c

@@ -0,0 +1,111 @@
+/** @file
+  SSL/TLS Initialization Null Library Wrapper Implementation.
+
+Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.<BR>
+(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "InternalTlsLib.h"
+
+/**
+  Initializes the library.
+
+  This function registers ciphers and digests used directly and indirectly
+  by SSL/TLS, and initializes the readable error messages.
+  This function must be called before any other action takes places.
+
+  @retval TRUE   The library has been initialized.
+  @retval FALSE  Failed to initialize the library.
+
+**/
+BOOLEAN
+EFIAPI
+TlsInitialize (
+  VOID
+  )
+{
+  ASSERT(FALSE);
+  return FALSE;
+}
+
+/**
+  Free an allocated SSL_CTX object.
+
+  @param[in]  TlsCtx    Pointer to the SSL_CTX object to be released.
+
+**/
+VOID
+EFIAPI
+TlsCtxFree (
+  IN   VOID                  *TlsCtx
+  )
+{
+  ASSERT(FALSE);
+  return;
+}
+
+/**
+  Creates a new SSL_CTX object as framework to establish TLS/SSL enabled
+  connections.
+
+  @param[in]  MajorVer    Major Version of TLS/SSL Protocol.
+  @param[in]  MinorVer    Minor Version of TLS/SSL Protocol.
+
+  @return  Pointer to an allocated SSL_CTX object.
+           If the creation failed, TlsCtxNew() returns NULL.
+
+**/
+VOID *
+EFIAPI
+TlsCtxNew (
+  IN     UINT8                    MajorVer,
+  IN     UINT8                    MinorVer
+  )
+{
+  ASSERT(FALSE);
+  return NULL;
+}
+
+/**
+  Free an allocated TLS object.
+
+  This function removes the TLS object pointed to by Tls and frees up the
+  allocated memory. If Tls is NULL, nothing is done.
+
+  @param[in]  Tls    Pointer to the TLS object to be freed.
+
+**/
+VOID
+EFIAPI
+TlsFree (
+  IN     VOID                     *Tls
+  )
+{
+  ASSERT(FALSE);
+}
+
+/**
+  Create a new TLS object for a connection.
+
+  This function creates a new TLS object for a connection. The new object
+  inherits the setting of the underlying context TlsCtx: connection method,
+  options, verification setting.
+
+  @param[in]  TlsCtx    Pointer to the SSL_CTX object.
+
+  @return  Pointer to an allocated SSL object.
+           If the creation failed, TlsNew() returns NULL.
+
+**/
+VOID *
+EFIAPI
+TlsNew (
+  IN     VOID                     *TlsCtx
+  )
+{
+  ASSERT(FALSE);
+  return NULL;
+}
+