1 files changed, 147 insertions, 0 deletions
diff --git a/examples/tls_client_session_picotls.cc b/examples/tls_client_session_picotls.cc
new file mode 100644
index 0000000..8f5bdfc
--- /dev/null
+++ b/examples/tls_client_session_picotls.cc
@@ -0,0 +1,147 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2022 ngtcp2 contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "tls_client_session_picotls.h"
+
+#include <iostream>
+#include <memory>
+
+#include <ngtcp2/ngtcp2_crypto_picotls.h>
+
+#include <openssl/bio.h>
+#include <openssl/pem.h>
+
+#include <picotls.h>
+
+#include "tls_client_context_picotls.h"
+#include "client_base.h"
+#include "template.h"
+#include "util.h"
+
+using namespace std::literals;
+
+extern Config config;
+
+TLSClientSession::TLSClientSession() {}
+
+TLSClientSession::~TLSClientSession() {
+  auto &hsprops = cptls_.handshake_properties;
+
+  delete[] hsprops.client.session_ticket.base;
+}
+
+namespace {
+auto negotiated_protocols = std::array<ptls_iovec_t, 1>{{
+    {
+        .base = const_cast<uint8_t *>(&H3_ALPN_V1[1]),
+        .len = H3_ALPN_V1[0],
+    },
+}};
+} // namespace
+
+int TLSClientSession::init(bool &early_data_enabled, TLSClientContext &tls_ctx,
+                           const char *remote_addr, ClientBase *client,
+                           uint32_t quic_version, AppProtocol app_proto) {
+  cptls_.ptls = ptls_client_new(tls_ctx.get_native_handle());
+  if (!cptls_.ptls) {
+    std::cerr << "ptls_client_new failed" << std::endl;
+    return -1;
+  }
+
+  *ptls_get_data_ptr(cptls_.ptls) = client->conn_ref();
+
+  auto conn = client->conn();
+  auto &hsprops = cptls_.handshake_properties;
+
+  hsprops.additional_extensions = new ptls_raw_extension_t[2]{
+      {
+          .type = UINT16_MAX,
+      },
+      {
+          .type = UINT16_MAX,
+      },
+  };
+
+  if (ngtcp2_crypto_picotls_configure_client_session(&cptls_, conn) != 0) {
+    std::cerr << "ngtcp2_crypto_picotls_configure_client_session failed"
+              << std::endl;
+    return -1;
+  }
+
+  hsprops.client.negotiated_protocols.list = negotiated_protocols.data();
+  hsprops.client.negotiated_protocols.count = negotiated_protocols.size();
+
+  if (util::numeric_host(remote_addr)) {
+    // If remote host is numeric address, just send "localhost" as SNI
+    // for now.
+    ptls_set_server_name(cptls_.ptls, "localhost", strlen("localhost"));
+  } else {
+    ptls_set_server_name(cptls_.ptls, remote_addr, strlen(remote_addr));
+  }
+
+  if (config.session_file) {
+    auto f = BIO_new_file(config.session_file, "r");
+    if (f == nullptr) {
+      std::cerr << "Could not read TLS session file " << config.session_file
+                << std::endl;
+    } else {
+      auto f_d = defer(BIO_free, f);
+
+      char *name, *header;
+      unsigned char *data;
+      long datalen;
+
+      if (PEM_read_bio(f, &name, &header, &data, &datalen) != 1) {
+        std::cerr << "Could not read TLS session file " << config.session_file
+                  << std::endl;
+      } else {
+        if ("PICOTLS SESSION PARAMETERS"sv != name) {
+          std::cerr << "TLS session file contains unexpected name: " << name
+                    << std::endl;
+        } else {
+          hsprops.client.session_ticket.base = new uint8_t[datalen];
+          hsprops.client.session_ticket.len = datalen;
+          memcpy(hsprops.client.session_ticket.base, data, datalen);
+
+          if (!config.disable_early_data) {
+            // No easy way to check max_early_data from ticket.  We
+            // need to run ptls_handle_message.
+            early_data_enabled = true;
+          }
+        }
+
+        OPENSSL_free(name);
+        OPENSSL_free(header);
+        OPENSSL_free(data);
+      }
+    }
+  }
+
+  return 0;
+}
+
+bool TLSClientSession::get_early_data_accepted() const {
+  return cptls_.handshake_properties.client.early_data_acceptance ==
+         PTLS_EARLY_DATA_ACCEPTED;
+}