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/*
* Copyright (c) 2021 Cisco and/or its affiliates.
* Licensed 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 <hicn/transport/interfaces/socket_consumer.h>
#include <implementation/tls_socket_consumer.h>
#include <openssl/bio.h>
#include <openssl/ssl.h>
namespace transport {
namespace implementation {
class P2PSecureConsumerSocket : public ConsumerSocket,
public interface::ConsumerSocket::ReadCallback {
/* Return the number of read bytes in readbytes */
friend int read(BIO *b, char *buf, size_t size, size_t *readbytes);
/* Return the number of read bytes in the return param */
friend int readOld(BIO *h, char *buf, int size);
/* Return the number of written bytes in written */
friend int write(BIO *b, const char *buf, size_t size, size_t *written);
/* Return the number of written bytes in the return param */
friend int writeOld(BIO *h, const char *buf, int num);
friend long ctrl(BIO *b, int cmd, long num, void *ptr);
public:
explicit P2PSecureConsumerSocket(interface::ConsumerSocket *consumer,
int handshake_protocol,
int transport_protocol);
~P2PSecureConsumerSocket();
int consume(const Name &name) override;
void registerPrefix(const Prefix &producer_namespace);
int setSocketOption(
int socket_option_key,
interface::ConsumerSocket::ReadCallback *socket_option_value) override;
using ConsumerSocket::getSocketOption;
using ConsumerSocket::setSocketOption;
protected:
/* Callback invoked once an interest has been received and its payload
* decrypted */
ConsumerInterestCallback on_interest_input_decrypted_;
ConsumerInterestCallback on_interest_process_decrypted_;
private:
Name name_;
std::shared_ptr<TLSConsumerSocket> tls_consumer_;
/* SSL handle */
SSL *ssl_;
SSL_CTX *ctx_;
BIO_METHOD *bio_meth_;
/* Chain of MemBuf to be used as a temporary buffer to pass descypted data
* from the underlying layer to the application */
std::unique_ptr<utils::MemBuf> decrypted_content_;
/* Chain of MemBuf holding the payload to be written into interest or data */
std::unique_ptr<utils::MemBuf> payload_;
/* Chain of MemBuf holding the data retrieved from the underlying layer */
std::unique_ptr<utils::MemBuf> head_;
bool something_to_read_;
bool content_downloaded_;
double old_max_win_;
double old_current_win_;
uint32_t random_suffix_;
ip_prefix_t secure_prefix_;
Prefix producer_namespace_;
interface::ConsumerSocket::ReadCallback *read_callback_decrypted_;
std::mutex mtx_;
/* Condition variable for the wait */
std::condition_variable cv_;
int protocol_;
void setInterestPayload(interface::ConsumerSocket &c,
const core::Interest &interest);
static int addHicnKeyIdCb(SSL *s, unsigned int ext_type, unsigned int context,
const unsigned char **out, size_t *outlen, X509 *x,
size_t chainidx, int *al, void *add_arg);
static void freeHicnKeyIdCb(SSL *s, unsigned int ext_type,
unsigned int context, const unsigned char *out,
void *add_arg);
static int parseHicnKeyIdCb(SSL *s, unsigned int ext_type,
unsigned int context, const unsigned char *in,
size_t inlen, X509 *x, size_t chainidx, int *al,
void *add_arg);
virtual void getReadBuffer(uint8_t **application_buffer,
size_t *max_length) override;
virtual void readDataAvailable(size_t length) noexcept override;
virtual size_t maxBufferSize() const override;
virtual void readBufferAvailable(
std::unique_ptr<utils::MemBuf> &&buffer) noexcept override;
virtual void readError(const std::error_code &ec) noexcept override;
virtual void readSuccess(std::size_t total_size) noexcept override;
virtual bool isBufferMovable() noexcept override;
int handshake();
void initSessionSocket();
};
} // namespace implementation
} // end namespace transport
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