[HICN-534] Major rework on libtransport organization

Change-Id: I361b83a18b4fd59be136d5f0817fc28e17e89884
Signed-off-by: Mauro Sardara <msardara@cisco.com>

1 files changed, 403 insertions, 0 deletions

diff --git a/libtransport/src/implementation/p2psecure_socket_consumer.cc b/libtransport/src/implementation/p2psecure_socket_consumer.cc
new file mode 100644
index 000000000..40ab58161
--- /dev/null
+++ b/libtransport/src/implementation/p2psecure_socket_consumer.cc
@@ -0,0 +1,403 @@
+/*
+ * Copyright (c) 2017-2020 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.
+ */
+
+#include <implementation/p2psecure_socket_consumer.h>
+#include <interfaces/tls_socket_consumer.h>
+
+#include <openssl/bio.h>
+#include <openssl/ssl.h>
+#include <openssl/tls1.h>
+
+#include <random>
+
+namespace transport {
+namespace implementation {
+
+void P2PSecureConsumerSocket::setInterestPayload(
+    interface::ConsumerSocket &c, const core::Interest &interest) {
+  Interest &int2 = const_cast<Interest &>(interest);
+  random_suffix_ = int2.getName().getSuffix();
+
+  if (payload_ != NULL) int2.appendPayload(std::move(payload_));
+}
+
+// implement void readBufferAvailable(), size_t maxBufferSize() const override,
+// void readError(), void readSuccess(). getReadBuffer() and readDataAvailable()
+// must be implemented even if empty.
+
+/* Return the number of read bytes in the return param */
+int readOld(BIO *b, char *buf, int size) {
+  if (size < 0) return size;
+
+  P2PSecureConsumerSocket *socket;
+  socket = (P2PSecureConsumerSocket *)BIO_get_data(b);
+
+  std::unique_lock<std::mutex> lck(socket->mtx_);
+
+  if (!socket->something_to_read_) {
+    if (!socket->transport_protocol_->isRunning()) {
+      socket->network_name_.setSuffix(socket->random_suffix_);
+      socket->ConsumerSocket::asyncConsume(socket->network_name_);
+    }
+    if (!socket->something_to_read_) socket->cv_.wait(lck);
+  }
+
+  size_t size_to_read, read;
+  size_t chain_size = socket->head_->length();
+  if (socket->head_->isChained())
+    chain_size = socket->head_->computeChainDataLength();
+
+  if (chain_size > (size_t)size) {
+    read = size_to_read = (size_t)size;
+  } else {
+    read = size_to_read = chain_size;
+    socket->something_to_read_ = false;
+  }
+
+  while (size_to_read) {
+    if (socket->head_->length() < size_to_read) {
+      std::memcpy(buf, socket->head_->data(), socket->head_->length());
+      size_to_read -= socket->head_->length();
+      buf += socket->head_->length();
+      socket->head_ = socket->head_->pop();
+    } else {
+      std::memcpy(buf, socket->head_->data(), size_to_read);
+      socket->head_->trimStart(size_to_read);
+      size_to_read = 0;
+    }
+  }
+
+  return read;
+}
+
+/* Return the number of read bytes in readbytes */
+int read(BIO *b, char *buf, size_t size, size_t *readbytes) {
+  int ret;
+
+  if (size > INT_MAX) size = INT_MAX;
+
+  ret = readOld(b, buf, (int)size);
+
+  if (ret <= 0) {
+    *readbytes = 0;
+    return ret;
+  }
+
+  *readbytes = (size_t)ret;
+
+  return 1;
+}
+
+/* Return the number of written bytes in the return param */
+int writeOld(BIO *b, const char *buf, int num) {
+  P2PSecureConsumerSocket *socket;
+  socket = (P2PSecureConsumerSocket *)BIO_get_data(b);
+
+  socket->payload_ = utils::MemBuf::copyBuffer(buf, num);
+  socket->ConsumerSocket::setSocketOption(
+      ConsumerCallbacksOptions::INTEREST_OUTPUT,
+      (ConsumerInterestCallback)std::bind(
+          &P2PSecureConsumerSocket::setInterestPayload, socket,
+          std::placeholders::_1, std::placeholders::_2));
+
+  return num;
+}
+
+/* Return the number of written bytes in written */
+int write(BIO *b, const char *buf, size_t size, size_t *written) {
+  int ret;
+
+  if (size > INT_MAX) size = INT_MAX;
+
+  ret = writeOld(b, buf, (int)size);
+
+  if (ret <= 0) {
+    *written = 0;
+    return ret;
+  }
+
+  *written = (size_t)ret;
+
+  return 1;
+}
+
+long ctrl(BIO *b, int cmd, long num, void *ptr) { return 1; }
+
+int P2PSecureConsumerSocket::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) {
+  if (ext_type == 100) {
+    *out = (unsigned char *)malloc(4);
+    *(uint32_t *)*out = 10;
+    *outlen = 4;
+  }
+  return 1;
+}
+
+void P2PSecureConsumerSocket::freeHicnKeyIdCb(SSL *s, unsigned int ext_type,
+                                              unsigned int context,
+                                              const unsigned char *out,
+                                              void *add_arg) {
+  free(const_cast<unsigned char *>(out));
+}
+
+int P2PSecureConsumerSocket::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) {
+  P2PSecureConsumerSocket *socket =
+      reinterpret_cast<P2PSecureConsumerSocket *>(add_arg);
+  if (ext_type == 100) {
+    memcpy(&socket->secure_prefix_, in, sizeof(ip_prefix_t));
+  }
+  return 1;
+}
+
+P2PSecureConsumerSocket::P2PSecureConsumerSocket(
+    interface::ConsumerSocket *consumer, int handshake_protocol,
+    int transport_protocol)
+    : ConsumerSocket(consumer, transport_protocol),
+      name_(),
+      tls_consumer_(),
+      buf_pool_(),
+      decrypted_content_(),
+      payload_(),
+      head_(),
+      something_to_read_(false),
+      content_downloaded_(false),
+      random_suffix_(),
+      secure_prefix_(),
+      producer_namespace_(),
+      read_callback_decrypted_(),
+      mtx_(),
+      cv_(),
+      protocol_(transport_protocol) {
+  /* Create the (d)TLS state */
+  const SSL_METHOD *meth = TLS_client_method();
+  ctx_ = SSL_CTX_new(meth);
+
+  int result =
+      SSL_CTX_set_ciphersuites(ctx_,
+                               "TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_"
+                               "SHA256:TLS_AES_128_GCM_SHA256");
+  if (result != 1) {
+    throw errors::RuntimeException(
+        "Unable to set cipher list on TLS subsystem. Aborting.");
+  }
+
+  SSL_CTX_set_min_proto_version(ctx_, TLS1_3_VERSION);
+  SSL_CTX_set_max_proto_version(ctx_, TLS1_3_VERSION);
+  SSL_CTX_set_verify(ctx_, SSL_VERIFY_NONE, NULL);
+  SSL_CTX_set_ssl_version(ctx_, meth);
+
+  result = SSL_CTX_add_custom_ext(
+      ctx_, 100, SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS,
+      P2PSecureConsumerSocket::addHicnKeyIdCb,
+      P2PSecureConsumerSocket::freeHicnKeyIdCb, NULL,
+      P2PSecureConsumerSocket::parseHicnKeyIdCb, this);
+
+  ssl_ = SSL_new(ctx_);
+
+  bio_meth_ = BIO_meth_new(BIO_TYPE_CONNECT, "secure consumer socket");
+  BIO_meth_set_read(bio_meth_, readOld);
+  BIO_meth_set_write(bio_meth_, writeOld);
+  BIO_meth_set_ctrl(bio_meth_, ctrl);
+  BIO *bio = BIO_new(bio_meth_);
+  BIO_set_init(bio, 1);
+  BIO_set_data(bio, this);
+  SSL_set_bio(ssl_, bio, bio);
+
+  ConsumerSocket::getSocketOption(MAX_WINDOW_SIZE, old_max_win_);
+  ConsumerSocket::setSocketOption(MAX_WINDOW_SIZE, (double)1.0);
+
+  ConsumerSocket::getSocketOption(CURRENT_WINDOW_SIZE, old_current_win_);
+  ConsumerSocket::setSocketOption(CURRENT_WINDOW_SIZE, (double)1.0);
+
+  std::default_random_engine generator;
+  std::uniform_int_distribution<int> distribution(
+      1, std::numeric_limits<uint32_t>::max());
+  random_suffix_ = 0;
+
+  this->ConsumerSocket::setSocketOption(ConsumerCallbacksOptions::READ_CALLBACK,
+                                        this);
+};
+
+P2PSecureConsumerSocket::~P2PSecureConsumerSocket() {
+  BIO_meth_free(bio_meth_);
+  SSL_shutdown(ssl_);
+}
+
+int P2PSecureConsumerSocket::consume(const Name &name) {
+  if (transport_protocol_->isRunning()) {
+    return CONSUMER_BUSY;
+  }
+
+  if ((SSL_in_before(this->ssl_) || SSL_in_init(this->ssl_))) {
+    ConsumerSocket::setSocketOption(MAX_WINDOW_SIZE, (double)1.0);
+    network_name_ = producer_namespace_.getRandomName();
+    network_name_.setSuffix(0);
+    int result = SSL_connect(this->ssl_);
+    ConsumerSocket::setSocketOption(MAX_WINDOW_SIZE, old_max_win_);
+    ConsumerSocket::setSocketOption(CURRENT_WINDOW_SIZE, old_current_win_);
+    if (result != 1)
+      throw errors::RuntimeException("Unable to perform client handshake");
+  }
+  std::shared_ptr<Name> prefix_name = std::make_shared<Name>(
+      secure_prefix_.family,
+      ip_address_get_buffer(&(secure_prefix_.address), secure_prefix_.family));
+  std::shared_ptr<Prefix> prefix =
+      std::make_shared<Prefix>(*prefix_name, secure_prefix_.len);
+  TLSConsumerSocket tls_consumer(nullptr, this->protocol_, this->ssl_);
+  tls_consumer.setInterface(new interface::TLSConsumerSocket(&tls_consumer));
+
+  ConsumerTimerCallback *stats_summary_callback = nullptr;
+  this->getSocketOption(ConsumerCallbacksOptions::STATS_SUMMARY,
+                        &stats_summary_callback);
+
+  uint32_t lifetime;
+  this->getSocketOption(GeneralTransportOptions::INTEREST_LIFETIME, lifetime);
+  tls_consumer.setSocketOption(GeneralTransportOptions::INTEREST_LIFETIME,
+                               lifetime);
+  tls_consumer.setSocketOption(ConsumerCallbacksOptions::READ_CALLBACK,
+                               read_callback_decrypted_);
+  tls_consumer.setSocketOption(ConsumerCallbacksOptions::STATS_SUMMARY,
+                               *stats_summary_callback);
+  tls_consumer.setSocketOption(GeneralTransportOptions::STATS_INTERVAL,
+                               this->timer_interval_milliseconds_);
+  tls_consumer.setSocketOption(MAX_WINDOW_SIZE, old_max_win_);
+  tls_consumer.setSocketOption(CURRENT_WINDOW_SIZE, old_current_win_);
+  tls_consumer.connect();
+
+  if (payload_ != NULL)
+    return tls_consumer.consume((prefix->mapName(name)), std::move(payload_));
+  else
+    return tls_consumer.consume((prefix->mapName(name)));
+}
+
+int P2PSecureConsumerSocket::asyncConsume(const Name &name) {
+  if ((SSL_in_before(this->ssl_) || SSL_in_init(this->ssl_))) {
+    ConsumerSocket::setSocketOption(CURRENT_WINDOW_SIZE, (double)1.0);
+    ConsumerSocket::setSocketOption(MAX_WINDOW_SIZE, (double)1.0);
+    network_name_ = producer_namespace_.getRandomName();
+    network_name_.setSuffix(0);
+    TRANSPORT_LOGD("Start handshake at %s", network_name_.toString().c_str());
+    interface::ConsumerSocket::ReadCallback *on_payload = VOID_HANDLER;
+    this->getSocketOption(ConsumerCallbacksOptions::READ_CALLBACK, &on_payload);
+    int result = SSL_connect(this->ssl_);
+    ConsumerSocket::setSocketOption(MAX_WINDOW_SIZE, old_max_win_);
+    ConsumerSocket::setSocketOption(CURRENT_WINDOW_SIZE, old_current_win_);
+    if (result != 1)
+      throw errors::RuntimeException("Unable to perform client handshake");
+    TRANSPORT_LOGD("Handshake performed!");
+  }
+
+  std::shared_ptr<Name> prefix_name = std::make_shared<Name>(
+      secure_prefix_.family,
+      ip_address_get_buffer(&(secure_prefix_.address), secure_prefix_.family));
+  std::shared_ptr<Prefix> prefix =
+      std::make_shared<Prefix>(*prefix_name, secure_prefix_.len);
+
+  tls_consumer_ =
+      std::make_shared<TLSConsumerSocket>(nullptr, this->protocol_, this->ssl_);
+  tls_consumer_->setInterface(
+      new interface::TLSConsumerSocket(tls_consumer_.get()));
+
+  ConsumerTimerCallback *stats_summary_callback = nullptr;
+  this->getSocketOption(ConsumerCallbacksOptions::STATS_SUMMARY,
+                        &stats_summary_callback);
+
+  uint32_t lifetime;
+  this->getSocketOption(GeneralTransportOptions::INTEREST_LIFETIME, lifetime);
+  tls_consumer_->setSocketOption(GeneralTransportOptions::INTEREST_LIFETIME,
+                                 lifetime);
+  tls_consumer_->setSocketOption(ConsumerCallbacksOptions::READ_CALLBACK,
+                                 read_callback_decrypted_);
+  tls_consumer_->setSocketOption(ConsumerCallbacksOptions::STATS_SUMMARY,
+                                 *stats_summary_callback);
+  tls_consumer_->setSocketOption(GeneralTransportOptions::STATS_INTERVAL,
+                                 this->timer_interval_milliseconds_);
+  tls_consumer_->setSocketOption(MAX_WINDOW_SIZE, old_max_win_);
+  tls_consumer_->setSocketOption(CURRENT_WINDOW_SIZE, old_current_win_);
+  tls_consumer_->connect();
+
+  if (payload_ != NULL)
+    return tls_consumer_->asyncConsume((prefix->mapName(name)),
+                                       std::move(payload_));
+  else
+    return tls_consumer_->asyncConsume((prefix->mapName(name)));
+}
+
+void P2PSecureConsumerSocket::registerPrefix(const Prefix &producer_namespace) {
+  producer_namespace_ = producer_namespace;
+}
+
+int P2PSecureConsumerSocket::setSocketOption(
+    int socket_option_key, ReadCallback *socket_option_value) {
+  return rescheduleOnIOService(
+      socket_option_key, socket_option_value,
+      [this](int socket_option_key, ReadCallback *socket_option_value) -> int {
+        switch (socket_option_key) {
+          case ConsumerCallbacksOptions::READ_CALLBACK:
+            read_callback_decrypted_ = socket_option_value;
+            break;
+          default:
+            return SOCKET_OPTION_NOT_SET;
+        }
+
+        return SOCKET_OPTION_SET;
+      });
+}
+
+void P2PSecureConsumerSocket::getReadBuffer(uint8_t **application_buffer,
+                                            size_t *max_length){};
+
+void P2PSecureConsumerSocket::readDataAvailable(size_t length) noexcept {};
+
+size_t P2PSecureConsumerSocket::maxBufferSize() const {
+  return SSL3_RT_MAX_PLAIN_LENGTH;
+}
+
+void P2PSecureConsumerSocket::readBufferAvailable(
+    std::unique_ptr<utils::MemBuf> &&buffer) noexcept {
+  std::unique_lock<std::mutex> lck(this->mtx_);
+  if (head_) {
+    head_->prependChain(std::move(buffer));
+  } else {
+    head_ = std::move(buffer);
+  }
+
+  something_to_read_ = true;
+  cv_.notify_one();
+}
+
+void P2PSecureConsumerSocket::readError(const std::error_code ec) noexcept {};
+
+void P2PSecureConsumerSocket::readSuccess(std::size_t total_size) noexcept {
+  std::unique_lock<std::mutex> lck(this->mtx_);
+  content_downloaded_ = true;
+  something_to_read_ = true;
+  cv_.notify_one();
+}
+
+bool P2PSecureConsumerSocket::isBufferMovable() noexcept { return true; }
+
+}  // namespace implementation
+
+}  // namespace transport