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authorMauro Sardara <msardara@cisco.com>2020-02-21 11:52:28 +0100
committerMauro Sardara <msardara@cisco.com>2020-02-26 13:19:16 +0100
commitf4433f28b509a9f67ca85d79000ccf9c2f4b7a24 (patch)
tree0f754bc9d8222f3ace11849165753acd85be3b38 /libtransport/src/implementation/tls_socket_producer.cc
parent0e7669445b6be1163189521eabed7dd0124043c8 (diff)
[HICN-534] Major rework on libtransport organization
Change-Id: I361b83a18b4fd59be136d5f0817fc28e17e89884 Signed-off-by: Mauro Sardara <msardara@cisco.com>
Diffstat (limited to 'libtransport/src/implementation/tls_socket_producer.cc')
-rw-r--r--libtransport/src/implementation/tls_socket_producer.cc611
1 files changed, 611 insertions, 0 deletions
diff --git a/libtransport/src/implementation/tls_socket_producer.cc b/libtransport/src/implementation/tls_socket_producer.cc
new file mode 100644
index 000000000..9a5b94a1c
--- /dev/null
+++ b/libtransport/src/implementation/tls_socket_producer.cc
@@ -0,0 +1,611 @@
+/*
+ * 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 <hicn/transport/interfaces/socket_producer.h>
+
+#include <implementation/p2psecure_socket_producer.h>
+#include <implementation/tls_socket_producer.h>
+
+#include <openssl/bio.h>
+#include <openssl/rand.h>
+#include <openssl/ssl.h>
+
+namespace transport {
+namespace implementation {
+
+/* Return the number of read bytes in readbytes */
+int TLSProducerSocket::read(BIO *b, char *buf, size_t size, size_t *readbytes) {
+ int ret;
+
+ if (size > INT_MAX) size = INT_MAX;
+
+ ret = TLSProducerSocket::readOld(b, buf, (int)size);
+
+ if (ret <= 0) {
+ *readbytes = 0;
+ return ret;
+ }
+
+ *readbytes = (size_t)ret;
+
+ return 1;
+}
+
+/* Return the number of read bytes in the return param */
+int TLSProducerSocket::readOld(BIO *b, char *buf, int size) {
+ TLSProducerSocket *socket;
+ socket = (TLSProducerSocket *)BIO_get_data(b);
+
+ /* take a lock on the mutex. It will be unlocked by */
+ std::unique_lock<std::mutex> lck(socket->mtx_);
+ if (!socket->something_to_read_) {
+ (socket->cv_).wait(lck);
+ }
+
+ /* Either there already is something to read, or the thread has been waken up
+ */
+ /* must return the payload in the interest */
+
+ utils::MemBuf *membuf = socket->packet_->next();
+ int size_to_read;
+ if ((int)membuf->length() > size) {
+ size_to_read = size;
+ } else {
+ size_to_read = membuf->length();
+ socket->something_to_read_ = false;
+ }
+
+ std::memcpy(buf, membuf->data(), size_to_read);
+ membuf->trimStart(size_to_read);
+
+ return size_to_read;
+}
+
+/* Return the number of written bytes in written */
+int TLSProducerSocket::write(BIO *b, const char *buf, size_t size,
+ size_t *written) {
+ int ret;
+
+ if (size > INT_MAX) size = INT_MAX;
+
+ ret = TLSProducerSocket::writeOld(b, buf, (int)size);
+
+ if (ret <= 0) {
+ *written = 0;
+ return ret;
+ }
+
+ *written = (size_t)ret;
+
+ return 1;
+}
+
+/* Return the number of written bytes in the return param */
+int TLSProducerSocket::writeOld(BIO *b, const char *buf, int num) {
+ TLSProducerSocket *socket;
+ socket = (TLSProducerSocket *)BIO_get_data(b);
+
+ if ((SSL_in_before(socket->ssl_) || SSL_in_init(socket->ssl_)) &&
+ socket->first_) {
+ //! socket->tls_chunks_ corresponds to is_last
+ socket->tls_chunks_--;
+ bool making_manifest = socket->parent_->making_manifest_;
+ socket->parent_->setSocketOption(GeneralTransportOptions::MAKE_MANIFEST,
+ false);
+ socket->parent_->ProducerSocket::produce(
+ socket->name_, (const uint8_t *)buf, num, socket->tls_chunks_ == 0,
+ socket->last_segment_);
+ socket->parent_->setSocketOption(GeneralTransportOptions::MAKE_MANIFEST,
+ making_manifest);
+ socket->first_ = false;
+ } else {
+ socket->still_writing_ = true;
+
+ std::unique_ptr<utils::MemBuf> mbuf =
+ utils::MemBuf::copyBuffer(buf, (std::size_t)num, 0, 0);
+ auto a = mbuf.release();
+ socket->async_thread_.add([socket = socket, a]() {
+ socket->tls_chunks_--;
+ socket->to_call_oncontentproduced_--;
+ auto mbuf = std::unique_ptr<utils::MemBuf>(a);
+ socket->last_segment_ += socket->ProducerSocket::produce(
+ socket->name_, std::move(mbuf), socket->tls_chunks_ == 0,
+ socket->last_segment_);
+ ProducerContentCallback on_content_produced_application;
+ socket->getSocketOption(ProducerCallbacksOptions::CONTENT_PRODUCED,
+ on_content_produced_application);
+ if (socket->to_call_oncontentproduced_ == 0 &&
+ on_content_produced_application) {
+ on_content_produced_application(*socket->getInterface(),
+ std::error_code(), 0);
+ }
+ });
+ }
+
+ return num;
+}
+
+TLSProducerSocket::TLSProducerSocket(interface::ProducerSocket *producer_socket,
+ P2PSecureProducerSocket *parent,
+ const Name &handshake_name)
+ : ProducerSocket(producer_socket),
+ on_content_produced_application_(),
+ mtx_(),
+ cv_(),
+ something_to_read_(),
+ name_(),
+ last_segment_(0),
+ parent_(parent),
+ first_(true),
+ handshake_name_(handshake_name),
+ tls_chunks_(0),
+ to_call_oncontentproduced_(0),
+ still_writing_(false),
+ encryption_thread_() {
+ const SSL_METHOD *meth = TLS_server_method();
+ ctx_ = SSL_CTX_new(meth);
+
+ /*
+ * Setup SSL context (identity and parameter to use TLS 1.3)
+ */
+ SSL_CTX_use_certificate(ctx_, parent->cert_509_);
+ SSL_CTX_use_PrivateKey(ctx_, parent->pkey_rsa_);
+
+ 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.");
+ }
+
+ // We force it to be TLS 1.3
+ 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_num_tickets(ctx_, 0);
+
+ result = SSL_CTX_add_custom_ext(
+ ctx_, 100, SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS,
+ TLSProducerSocket::addHicnKeyIdCb, TLSProducerSocket::freeHicnKeyIdCb,
+ this, TLSProducerSocket::parseHicnKeyIdCb, NULL);
+
+ ssl_ = SSL_new(ctx_);
+ /*
+ * Setup this producer socker as the bio that TLS will use to write and read
+ * data (in stream mode)
+ */
+ BIO_METHOD *bio_meth =
+ BIO_meth_new(BIO_TYPE_ACCEPT, "secure producer socket");
+ BIO_meth_set_read(bio_meth, TLSProducerSocket::readOld);
+ BIO_meth_set_write(bio_meth, TLSProducerSocket::writeOld);
+ BIO_meth_set_ctrl(bio_meth, TLSProducerSocket::ctrl);
+ BIO *bio = BIO_new(bio_meth);
+ BIO_set_init(bio, 1);
+ BIO_set_data(bio, this);
+ SSL_set_bio(ssl_, bio, bio);
+ /*
+ * Set the callback so that when an interest is received we catch it and we
+ * decrypt the payload before passing it to the application.
+ */
+ this->ProducerSocket::setSocketOption(
+ ProducerCallbacksOptions::CACHE_MISS,
+ (ProducerInterestCallback)std::bind(&TLSProducerSocket::cacheMiss, this,
+ std::placeholders::_1,
+ std::placeholders::_2));
+ this->ProducerSocket::setSocketOption(
+ ProducerCallbacksOptions::CONTENT_PRODUCED,
+ (ProducerContentCallback)bind(
+ &TLSProducerSocket::onContentProduced, this, std::placeholders::_1,
+ std::placeholders::_2, std::placeholders::_3));
+}
+
+/*
+ * The producer interface is not owned by the application, so is TLSSocket task
+ * to deallocate the memory
+ */
+TLSProducerSocket::~TLSProducerSocket() { delete producer_interface_; }
+
+void TLSProducerSocket::accept() {
+ if (SSL_in_before(ssl_) || SSL_in_init(ssl_)) {
+ tls_chunks_ = 1;
+ int result = SSL_accept(ssl_);
+ if (result != 1)
+ throw errors::RuntimeException("Unable to perform client handshake");
+ }
+ TRANSPORT_LOGD("Handshake performed!");
+ parent_->list_secure_producers.push_front(
+ std::move(parent_->map_secure_producers[handshake_name_]));
+ parent_->map_secure_producers.erase(handshake_name_);
+
+ ProducerInterestCallback on_interest_process_decrypted;
+ getSocketOption(ProducerCallbacksOptions::CACHE_MISS,
+ on_interest_process_decrypted);
+
+ if (on_interest_process_decrypted) {
+ Interest inter(std::move(packet_));
+ on_interest_process_decrypted(*getInterface(), inter);
+ } else {
+ throw errors::RuntimeException(
+ "On interest process unset. Unable to perform handshake");
+ }
+}
+
+int TLSProducerSocket::async_accept() {
+ if (!async_thread_.stopped()) {
+ async_thread_.add([this]() { this->accept(); });
+ } else {
+ throw errors::RuntimeException(
+ "Async thread not running, impossible to perform handshake");
+ }
+
+ return 1;
+}
+
+void TLSProducerSocket::onInterest(ProducerSocket &p, Interest &interest) {
+ /* Based on the state machine of (D)TLS, we know what action to do */
+ if (SSL_in_before(ssl_) || SSL_in_init(ssl_)) {
+ std::unique_lock<std::mutex> lck(mtx_);
+ name_ = interest.getName();
+ something_to_read_ = true;
+ packet_ = interest.acquireMemBufReference();
+ if (head_) {
+ payload_->prependChain(interest.getPayload());
+ } else {
+ payload_ = interest.getPayload(); // std::move(interest.getPayload());
+ }
+ cv_.notify_one();
+ } else {
+ name_ = interest.getName();
+ packet_ = interest.acquireMemBufReference();
+ payload_ = interest.getPayload();
+ something_to_read_ = true;
+
+ if (interest.getPayload()->length() > 0)
+ SSL_read(
+ ssl_,
+ const_cast<unsigned char *>(interest.getPayload()->writableData()),
+ interest.getPayload()->length());
+ }
+
+ ProducerInterestCallback on_interest_input_decrypted;
+ getSocketOption(ProducerCallbacksOptions::INTEREST_INPUT,
+ on_interest_input_decrypted);
+ if (on_interest_input_decrypted)
+ (on_interest_input_decrypted)(*getInterface(), interest);
+}
+
+void TLSProducerSocket::cacheMiss(interface::ProducerSocket &p,
+ Interest &interest) {
+ if (SSL_in_before(ssl_) || SSL_in_init(ssl_)) {
+ std::unique_lock<std::mutex> lck(mtx_);
+ name_ = interest.getName();
+ something_to_read_ = true;
+ packet_ = interest.acquireMemBufReference();
+ payload_ = interest.getPayload();
+ cv_.notify_one();
+ } else {
+ name_ = interest.getName();
+ packet_ = interest.acquireMemBufReference();
+ payload_ = interest.getPayload();
+ something_to_read_ = true;
+
+ if (interest.getPayload()->length() > 0)
+ SSL_read(
+ ssl_,
+ const_cast<unsigned char *>(interest.getPayload()->writableData()),
+ interest.getPayload()->length());
+
+ if (on_interest_process_decrypted_ != VOID_HANDLER)
+ on_interest_process_decrypted_(*getInterface(), interest);
+ }
+}
+
+void TLSProducerSocket::onContentProduced(interface::ProducerSocket &p,
+ const std::error_code &err,
+ uint64_t bytes_written) {}
+
+uint32_t TLSProducerSocket::produce(Name content_name,
+ std::unique_ptr<utils::MemBuf> &&buffer,
+ bool is_last, uint32_t start_offset) {
+ if (SSL_in_before(ssl_) || SSL_in_init(ssl_)) {
+ throw errors::RuntimeException(
+ "New handshake on the same P2P secure producer socket not supported");
+ }
+ size_t buf_size = buffer->length();
+ name_ = served_namespaces_.front().mapName(content_name);
+
+ tls_chunks_ = to_call_oncontentproduced_ =
+ ceil((float)buf_size / (float)SSL3_RT_MAX_PLAIN_LENGTH);
+
+ if (!is_last) {
+ tls_chunks_++;
+ }
+
+ last_segment_ = start_offset;
+
+ SSL_write(ssl_, buffer->data(), buf_size);
+ BIO *wbio = SSL_get_wbio(ssl_);
+ int i = BIO_flush(wbio);
+ (void)i; // To shut up gcc 5
+
+ return 0;
+}
+
+void TLSProducerSocket::asyncProduce(const Name &content_name,
+ const uint8_t *buf, size_t buffer_size,
+ bool is_last, uint32_t *start_offset) {
+ if (!encryption_thread_.stopped()) {
+ encryption_thread_.add([this, content_name, buffer = buf,
+ size = buffer_size, is_last, start_offset]() {
+ if (start_offset != NULL) {
+ produce(content_name, buffer, size, is_last, *start_offset);
+ } else {
+ produce(content_name, buffer, size, is_last, 0);
+ }
+ });
+ }
+}
+
+void TLSProducerSocket::asyncProduce(Name content_name,
+ std::unique_ptr<utils::MemBuf> &&buffer,
+ bool is_last, uint32_t offset,
+ uint32_t **last_segment) {
+ if (!encryption_thread_.stopped()) {
+ auto a = buffer.release();
+ encryption_thread_.add(
+ [this, content_name, a, is_last, offset, last_segment]() {
+ auto buf = std::unique_ptr<utils::MemBuf>(a);
+ if (last_segment != NULL) {
+ *last_segment = &last_segment_;
+ }
+ produce(content_name, std::move(buf), is_last, offset);
+ });
+ }
+}
+
+void TLSProducerSocket::asyncProduce(ContentObject &content_object) {
+ throw errors::RuntimeException("API not supported");
+}
+
+void TLSProducerSocket::produce(ContentObject &content_object) {
+ throw errors::RuntimeException("API not supported");
+}
+
+long TLSProducerSocket::ctrl(BIO *b, int cmd, long num, void *ptr) {
+ if (cmd == BIO_CTRL_FLUSH) {
+ }
+ return 1;
+}
+
+int TLSProducerSocket::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) {
+ TLSProducerSocket *socket = reinterpret_cast<TLSProducerSocket *>(add_arg);
+ if (ext_type == 100) {
+ ip_prefix_t ip_prefix =
+ socket->parent_->served_namespaces_.front().toIpPrefixStruct();
+ int inet_family =
+ socket->parent_->served_namespaces_.front().getAddressFamily();
+ uint16_t prefix_len_bits =
+ socket->parent_->served_namespaces_.front().getPrefixLength();
+ uint8_t prefix_len_bytes = prefix_len_bits / 8;
+ uint8_t prefix_len_u32 = prefix_len_bits / 32;
+
+ ip_prefix_t *out_ip = (ip_prefix_t *)malloc(sizeof(ip_prefix_t));
+ out_ip->family = inet_family;
+ out_ip->len = prefix_len_bits + 32;
+ u8 *out_ip_buf = const_cast<u8 *>(
+ ip_address_get_buffer(&(out_ip->address), inet_family));
+ *out = reinterpret_cast<unsigned char *>(out_ip);
+
+ RAND_bytes((unsigned char *)&socket->key_id_, 4);
+
+ memcpy(out_ip_buf, ip_address_get_buffer(&(ip_prefix.address), inet_family),
+ prefix_len_bytes);
+ memcpy((out_ip_buf + prefix_len_bytes), &socket->key_id_, 4);
+ *outlen = sizeof(ip_prefix_t);
+
+ ip_address_t mask = {};
+ ip_address_t keyId_component = {};
+ u32 *mask_buf;
+ u32 *keyId_component_buf;
+ switch (inet_family) {
+ case AF_INET:
+ mask_buf = &(mask.v4.as_u32);
+ keyId_component_buf = &(keyId_component.v4.as_u32);
+ break;
+ case AF_INET6:
+ mask_buf = mask.v6.as_u32;
+ keyId_component_buf = keyId_component.v6.as_u32;
+ break;
+ default:
+ throw errors::RuntimeException("Unknown protocol");
+ }
+
+ if (prefix_len_bits > (inet_family == AF_INET6 ? IPV6_ADDR_LEN_BITS - 32
+ : IPV4_ADDR_LEN_BITS - 32))
+ throw errors::RuntimeException(
+ "Not enough space in the content name to add key_id");
+
+ mask_buf[prefix_len_u32] = 0xffffffff;
+ keyId_component_buf[prefix_len_u32] = socket->key_id_;
+ socket->last_segment_ = 0;
+
+ socket->on_interest_process_decrypted_ =
+ socket->parent_->on_interest_process_decrypted_;
+
+ socket->registerPrefix(
+ Prefix(socket->parent_->served_namespaces_.front().getName(
+ Name(inet_family, (uint8_t *)&mask),
+ Name(inet_family, (uint8_t *)&keyId_component),
+ socket->parent_->served_namespaces_.front().getName()),
+ out_ip->len));
+ socket->connect();
+ }
+ return 1;
+}
+
+void TLSProducerSocket::freeHicnKeyIdCb(SSL *s, unsigned int ext_type,
+ unsigned int context,
+ const unsigned char *out,
+ void *add_arg) {
+ free(const_cast<unsigned char *>(out));
+}
+
+int TLSProducerSocket::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) {
+ return 1;
+}
+
+int TLSProducerSocket::setSocketOption(
+ int socket_option_key, ProducerInterestCallback socket_option_value) {
+ return rescheduleOnIOService(
+ socket_option_key, socket_option_value,
+ [this](int socket_option_key,
+ ProducerInterestCallback socket_option_value) -> int {
+ int result = SOCKET_OPTION_SET;
+ switch (socket_option_key) {
+ case ProducerCallbacksOptions::INTEREST_INPUT:
+ on_interest_input_decrypted_ = socket_option_value;
+ break;
+
+ case ProducerCallbacksOptions::INTEREST_DROP:
+ on_interest_dropped_input_buffer_ = socket_option_value;
+ break;
+
+ case ProducerCallbacksOptions::INTEREST_PASS:
+ on_interest_inserted_input_buffer_ = socket_option_value;
+ break;
+
+ case ProducerCallbacksOptions::CACHE_HIT:
+ on_interest_satisfied_output_buffer_ = socket_option_value;
+ break;
+
+ case ProducerCallbacksOptions::CACHE_MISS:
+ on_interest_process_decrypted_ = socket_option_value;
+ break;
+
+ default:
+ result = SOCKET_OPTION_NOT_SET;
+ break;
+ }
+ return result;
+ });
+}
+
+int TLSProducerSocket::setSocketOption(
+ int socket_option_key, ProducerContentCallback socket_option_value) {
+ return rescheduleOnIOService(
+ socket_option_key, socket_option_value,
+ [this](int socket_option_key,
+ ProducerContentCallback socket_option_value) -> int {
+ switch (socket_option_key) {
+ case ProducerCallbacksOptions::CONTENT_PRODUCED:
+ on_content_produced_application_ = socket_option_value;
+ break;
+
+ default:
+ return SOCKET_OPTION_NOT_SET;
+ }
+
+ return SOCKET_OPTION_SET;
+ });
+}
+
+int TLSProducerSocket::getSocketOption(
+ int socket_option_key, ProducerContentCallback **socket_option_value) {
+ return rescheduleOnIOService(
+ socket_option_key, socket_option_value,
+ [this](int socket_option_key,
+ ProducerContentCallback **socket_option_value) -> int {
+ switch (socket_option_key) {
+ case ProducerCallbacksOptions::CONTENT_PRODUCED:
+ *socket_option_value = &on_content_produced_application_;
+ break;
+
+ default:
+ return SOCKET_OPTION_NOT_GET;
+ }
+
+ return SOCKET_OPTION_GET;
+ });
+}
+
+int TLSProducerSocket::getSocketOption(
+ int socket_option_key, ProducerContentCallback &socket_option_value) {
+ return rescheduleOnIOServiceWithReference(
+ socket_option_key, socket_option_value,
+ [this](int socket_option_key,
+ ProducerContentCallback &socket_option_value) -> int {
+ switch (socket_option_key) {
+ case ProducerCallbacksOptions::CONTENT_PRODUCED:
+ socket_option_value = on_content_produced_application_;
+ break;
+
+ default:
+ return SOCKET_OPTION_NOT_GET;
+ }
+
+ return SOCKET_OPTION_GET;
+ });
+}
+
+int TLSProducerSocket::getSocketOption(
+ int socket_option_key, ProducerInterestCallback &socket_option_value) {
+ // Reschedule the function on the io_service to avoid race condition in case
+ // setSocketOption is called while the io_service is running.
+ return rescheduleOnIOServiceWithReference(
+ socket_option_key, socket_option_value,
+ [this](int socket_option_key,
+ ProducerInterestCallback &socket_option_value) -> int {
+ switch (socket_option_key) {
+ case ProducerCallbacksOptions::INTEREST_INPUT:
+ socket_option_value = on_interest_input_decrypted_;
+ break;
+
+ case ProducerCallbacksOptions::INTEREST_DROP:
+ socket_option_value = on_interest_dropped_input_buffer_;
+ break;
+
+ case ProducerCallbacksOptions::INTEREST_PASS:
+ socket_option_value = on_interest_inserted_input_buffer_;
+ break;
+
+ case ProducerCallbacksOptions::CACHE_HIT:
+ socket_option_value = on_interest_satisfied_output_buffer_;
+ break;
+
+ case ProducerCallbacksOptions::CACHE_MISS:
+ socket_option_value = on_interest_process_decrypted_;
+ break;
+
+ default:
+ return SOCKET_OPTION_NOT_GET;
+ }
+
+ return SOCKET_OPTION_GET;
+ });
+}
+
+} // namespace implementation
+
+} // namespace transport