iocore/net/TLSSessionResumptionSupport.h

/** @file

  TLSSessionResumptionSupport implements common methods and members to
  support TLS Ssssion Resumption

  @section license License

  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
  regarding copyright ownership.  The ASF licenses this file
  to you under the Apache License, Version 2.0 (the
  "License"); you may not use this file except in compliance
  with the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
 */

#pragma once

#include <openssl/ssl.h>

#include "tscore/ink_inet.h"
#include "P_SSLCertLookup.h"
#include "P_SSLUtils.h"

class TLSSessionResumptionSupport
{
public:
  virtual ~TLSSessionResumptionSupport() = default;

  static void initialize();
  static TLSSessionResumptionSupport *getInstance(SSL *ssl);
  static void bind(SSL *ssl, TLSSessionResumptionSupport *srs);

  int processSessionTicket(SSL *ssl, unsigned char *keyname, unsigned char *iv, EVP_CIPHER_CTX *cipher_ctx, HMAC_CTX *hctx,
                           int enc);
  bool getSSLSessionCacheHit() const;
  ssl_curve_id getSSLCurveNID() const;

  SSL_SESSION *getSession(SSL *ssl, const unsigned char *id, int len, int *copy);

protected:
  void clear();
  virtual const IpEndpoint &_getLocalEndpoint() = 0;

private:
  static int _ex_data_index;

  bool _sslSessionCacheHit = false;
  int _sslCurveNID         = NID_undef;

  int _setSessionInformation(ssl_ticket_key_block *keyblock, SSL *ssl, unsigned char *keyname, unsigned char *iv,
                             EVP_CIPHER_CTX *cipher_ctx, HMAC_CTX *hctx);
  int _getSessionInformation(ssl_ticket_key_block *keyblock, SSL *ssl, unsigned char *keyname, unsigned char *iv,
                             EVP_CIPHER_CTX *cipher_ctx, HMAC_CTX *hctx);

  void _setSSLSessionCacheHit(bool state);
  void _setSSLCurveNID(ssl_curve_id curve_nid);
};