1 files changed, 126 insertions, 0 deletions
diff --git a/examples/tls_client_context_boringssl.cc b/examples/tls_client_context_boringssl.cc
new file mode 100644
index 0000000..bfdc525
--- /dev/null
+++ b/examples/tls_client_context_boringssl.cc
@@ -0,0 +1,126 @@
+/*
+ * ngtcp2
+ *
+ * Copyright (c) 2021 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_context_boringssl.h"
+
+#include <iostream>
+#include <fstream>
+
+#include <ngtcp2/ngtcp2_crypto_boringssl.h>
+
+#include <openssl/err.h>
+
+#include "client_base.h"
+#include "template.h"
+
+extern Config config;
+
+TLSClientContext::TLSClientContext() : ssl_ctx_{nullptr} {}
+
+TLSClientContext::~TLSClientContext() {
+  if (ssl_ctx_) {
+    SSL_CTX_free(ssl_ctx_);
+  }
+}
+
+SSL_CTX *TLSClientContext::get_native_handle() const { return ssl_ctx_; }
+
+namespace {
+int new_session_cb(SSL *ssl, SSL_SESSION *session) {
+  auto f = BIO_new_file(config.session_file, "w");
+  if (f == nullptr) {
+    std::cerr << "Could not write TLS session in " << config.session_file
+              << std::endl;
+    return 0;
+  }
+
+  if (!PEM_write_bio_SSL_SESSION(f, session)) {
+    std::cerr << "Unable to write TLS session to file" << std::endl;
+  }
+
+  BIO_free(f);
+
+  return 0;
+}
+} // namespace
+
+int TLSClientContext::init(const char *private_key_file,
+                           const char *cert_file) {
+  ssl_ctx_ = SSL_CTX_new(TLS_client_method());
+  if (!ssl_ctx_) {
+    std::cerr << "SSL_CTX_new: " << ERR_error_string(ERR_get_error(), nullptr)
+              << std::endl;
+    return -1;
+  }
+
+  if (ngtcp2_crypto_boringssl_configure_client_context(ssl_ctx_) != 0) {
+    std::cerr << "ngtcp2_crypto_boringssl_configure_client_context failed"
+              << std::endl;
+    return -1;
+  }
+
+  SSL_CTX_set_default_verify_paths(ssl_ctx_);
+
+  if (SSL_CTX_set1_curves_list(ssl_ctx_, config.groups) != 1) {
+    std::cerr << "SSL_CTX_set1_curves_list failed" << std::endl;
+    return -1;
+  }
+
+  if (private_key_file && cert_file) {
+    if (SSL_CTX_use_PrivateKey_file(ssl_ctx_, private_key_file,
+                                    SSL_FILETYPE_PEM) != 1) {
+      std::cerr << "SSL_CTX_use_PrivateKey_file: "
+                << ERR_error_string(ERR_get_error(), nullptr) << std::endl;
+      return -1;
+    }
+
+    if (SSL_CTX_use_certificate_chain_file(ssl_ctx_, cert_file) != 1) {
+      std::cerr << "SSL_CTX_use_certificate_chain_file: "
+                << ERR_error_string(ERR_get_error(), nullptr) << std::endl;
+      return -1;
+    }
+  }
+
+  if (config.session_file) {
+    SSL_CTX_set_session_cache_mode(ssl_ctx_, SSL_SESS_CACHE_CLIENT |
+                                                 SSL_SESS_CACHE_NO_INTERNAL);
+    SSL_CTX_sess_set_new_cb(ssl_ctx_, new_session_cb);
+  }
+
+  return 0;
+}
+
+extern std::ofstream keylog_file;
+
+namespace {
+void keylog_callback(const SSL *ssl, const char *line) {
+  keylog_file.write(line, strlen(line));
+  keylog_file.put('\n');
+  keylog_file.flush();
+}
+} // namespace
+
+void TLSClientContext::enable_keylog() {
+  SSL_CTX_set_keylog_callback(ssl_ctx_, keylog_callback);
+}