diff --git a/src/h2load.cc b/src/h2load.cc
index 281b5410..e0f75596 100644
--- a/src/h2load.cc
+++ b/src/h2load.cc
@@ -1027,12 +1027,9 @@ int Client::connection_made() {
     if (next_proto) {
       auto proto = StringRef{next_proto, next_proto_len};
       if (config.is_quic()) {
-        if (util::streq(StringRef{&NGTCP2_ALPN_H3[1]}, proto)) {
-          auto s = std::make_unique<Http3Session>(this);
-          if (s->init_conn() == -1) {
-            return -1;
-          }
-          session = std::move(s);
+        assert(session);
+        if (!util::streq(StringRef{&NGTCP2_ALPN_H3[1]}, proto)) {
+          return -1;
         }
       } else if (util::check_h2_is_selected(proto)) {
         session = std::make_unique<Http2Session>(this);
@@ -1043,6 +1040,9 @@ int Client::connection_made() {
       // Just assign next_proto to selected_proto anyway to show the
       // negotiation result.
       selected_proto = proto.str();
+    } else if (config.is_quic()) {
+      std::cerr << "QUIC requires ALPN negotiation" << std::endl;
+      return -1;
     } else {
       std::cout << "No protocol negotiated. Fallback behaviour may be activated"
                 << std::endl;
@@ -1778,79 +1778,6 @@ int client_select_next_proto_cb(SSL *ssl, unsigned char **out,
 } // namespace
 #endif // !OPENSSL_NO_NEXTPROTONEG
 
-namespace {
-int quic_transport_params_add_cb(SSL *ssl, unsigned int ext_type,
-                                 unsigned int content,
-                                 const unsigned char **out, size_t *outlen,
-                                 X509 *x, size_t chainidx, int *al,
-                                 void *add_arg) {
-  auto c = static_cast<Client *>(SSL_get_app_data(ssl));
-  auto conn = c->quic.conn;
-
-  ngtcp2_transport_params params;
-
-  ngtcp2_conn_get_local_transport_params(conn, &params);
-
-  constexpr size_t bufsize = 128;
-  auto buf = std::make_unique<uint8_t[]>(bufsize);
-
-  auto nwrite = ngtcp2_encode_transport_params(
-      buf.get(), bufsize, NGTCP2_TRANSPORT_PARAMS_TYPE_CLIENT_HELLO, &params);
-  if (nwrite < 0) {
-    std::cerr << "ngtcp2_encode_transport_params: " << ngtcp2_strerror(nwrite)
-              << std::endl;
-    *al = SSL_AD_INTERNAL_ERROR;
-    return -1;
-  }
-
-  *out = buf.release();
-  *outlen = static_cast<size_t>(nwrite);
-
-  return 1;
-}
-} // namespace
-
-namespace {
-void quic_transport_params_free_cb(SSL *ssl, unsigned int ext_type,
-                                   unsigned int context,
-                                   const unsigned char *out, void *add_arg) {
-  delete[] const_cast<unsigned char *>(out);
-}
-} // namespace
-
-namespace {
-int quic_transport_params_parse_cb(SSL *ssl, unsigned int ext_type,
-                                   unsigned int context,
-                                   const unsigned char *in, size_t inlen,
-                                   X509 *x, size_t chainidx, int *al,
-                                   void *parse_arg) {
-  auto c = static_cast<Client *>(SSL_get_app_data(ssl));
-  auto conn = c->quic.conn;
-
-  int rv;
-  ngtcp2_transport_params params;
-
-  rv = ngtcp2_decode_transport_params(
-      &params, NGTCP2_TRANSPORT_PARAMS_TYPE_ENCRYPTED_EXTENSIONS, in, inlen);
-  if (rv != 0) {
-    std::cerr << "ngtcp2_decode_transport_params: " << ngtcp2_strerror(rv)
-              << std::endl;
-    *al = SSL_AD_ILLEGAL_PARAMETER;
-    return -1;
-  }
-
-  rv = ngtcp2_conn_set_remote_transport_params(conn, &params);
-  if (rv != 0) {
-    std::cerr << "ngtcp2_conn_set_remote_transport_params: "
-              << ngtcp2_strerror(rv) << std::endl;
-    *al = SSL_AD_ILLEGAL_PARAMETER;
-    return -1;
-  }
-
-  return 1;
-}
-} // namespace
-
 namespace {
 constexpr char UNIX_PATH_PREFIX[] = "unix:";
 } // namespace
@@ -2250,8 +2177,6 @@ Options:
 }
 } // namespace
 
-extern ngtcp2_crypto_ctx in_crypto_ctx;
-
 int main(int argc, char **argv) {
   tls::libssl_init();
 
@@ -2753,20 +2678,6 @@ int main(int argc, char **argv) {
   if (config.is_quic()) {
     SSL_CTX_set_min_proto_version(ssl_ctx, TLS1_3_VERSION);
     SSL_CTX_set_max_proto_version(ssl_ctx, TLS1_3_VERSION);
-
-    SSL_CTX_clear_options(ssl_ctx, SSL_OP_ENABLE_MIDDLEBOX_COMPAT);
-    SSL_CTX_set_mode(ssl_ctx, SSL_MODE_QUIC_HACK);
-
-    if (SSL_CTX_add_custom_ext(
-            ssl_ctx, NGTCP2_TLSEXT_QUIC_TRANSPORT_PARAMETERS,
-            SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS,
-            quic_transport_params_add_cb, quic_transport_params_free_cb,
-            nullptr, quic_transport_params_parse_cb, nullptr) != 1) {
-      std::cerr << "SSL_CTX_add_custom_ext(NGTCP2_TLSEXT_QUIC_TRANSPORT_"
-                   "PARAMETERS) failed: "
-                << ERR_error_string(ERR_get_error(), nullptr) << std::endl;
-      exit(EXIT_FAILURE);
-    }
   } else if (nghttp2::tls::ssl_ctx_set_proto_versions(
                  ssl_ctx, nghttp2::tls::NGHTTP2_TLS_MIN_VERSION,
                  nghttp2::tls::NGHTTP2_TLS_MAX_VERSION) != 0) {
@@ -2909,8 +2820,6 @@ int main(int argc, char **argv) {
     exit(EXIT_FAILURE);
   }
 
-  ngtcp2_crypto_ctx_initial(&in_crypto_ctx);
-
   resolve_host();
 
   std::cout << "starting benchmark..." << std::endl;
diff --git a/src/h2load.h b/src/h2load.h
index 6d746b35..c65f3f0f 100644
--- a/src/h2load.h
+++ b/src/h2load.h
@@ -328,11 +328,6 @@ struct Client {
     ev_timer pkt_timer;
     ngtcp2_conn *conn;
     quic::Error last_error;
-    ngtcp2_crypto_level tx_crypto_level;
-    ngtcp2_crypto_level rx_crypto_level;
-    std::vector<uint8_t> server_handshake;
-    size_t server_handshake_nread;
-    ngtcp2_crypto_ctx crypto_ctx;
     // Client never send CRYPTO in Short packet.
     std::array<Crypto, 2> crypto;
     size_t max_pktlen;
@@ -461,45 +456,21 @@ struct Client {
   void quic_close_connection();
   int quic_setup_initial_crypto();
 
-  int quic_client_initial();
   int quic_recv_crypto_data(ngtcp2_crypto_level crypto_level,
                             const uint8_t *data, size_t datalen);
   int quic_handshake_completed();
-  int quic_in_encrypt(uint8_t *dest, const uint8_t *plaintext,
-                      size_t plaintextlen, const uint8_t *key,
-                      const uint8_t *nonce, size_t noncelen, const uint8_t *ad,
-                      size_t adlen);
-  int quic_in_decrypt(uint8_t *dest, const uint8_t *ciphertext,
-                      size_t ciphertextlen, const uint8_t *key,
-                      const uint8_t *nonce, size_t noncelen, const uint8_t *ad,
-                      size_t adlen);
-  int quic_encrypt(uint8_t *dest, const uint8_t *plaintext, size_t plaintextlen,
-                   const uint8_t *key, const uint8_t *nonce, size_t noncelen,
-                   const uint8_t *ad, size_t adlen);
-  int quic_decrypt(uint8_t *dest, const uint8_t *ciphertext,
-                   size_t ciphertextlen, const uint8_t *key,
-                   const uint8_t *nonce, size_t noncelen, const uint8_t *ad,
-                   size_t adlen);
-  int quic_in_hp_mask(uint8_t *dest, const uint8_t *key, const uint8_t *sample);
-  int quic_hp_mask(uint8_t *dest, const uint8_t *key, const uint8_t *sample);
   int quic_recv_stream_data(int64_t stream_id, int fin, const uint8_t *data,
                             size_t datalen);
   int quic_stream_close(int64_t stream_id, uint64_t app_error_code);
   int quic_stream_reset(int64_t stream_id, uint64_t app_error_code);
   int quic_extend_max_local_streams();
 
-  int quic_tls_handshake(bool initial = false);
-  int quic_read_tls();
-
-  int quic_on_key(int name, const uint8_t *secret, size_t secretlen);
+  int quic_on_key(ngtcp2_crypto_level level, const uint8_t *rx_secret,
+                  const uint8_t *tx_secret, size_t secretlen);
   void quic_set_tls_alert(uint8_t alert);
 
-  size_t quic_read_server_handshake(uint8_t *buf, size_t buflen);
-  int quic_write_server_handshake(ngtcp2_crypto_level crypto_level,
-                                  const uint8_t *data, size_t datalen);
-  void quic_write_client_handshake(const uint8_t *data, size_t datalen);
-  void quic_write_client_handshake(Crypto &crypto, const uint8_t *data,
-                                   size_t datalen);
+  void quic_write_client_handshake(ngtcp2_crypto_level level,
+                                   const uint8_t *data, size_t datalen);
   int quic_pkt_timeout();
   void quic_restart_pkt_timer();
 };
diff --git a/src/h2load_quic.cc b/src/h2load_quic.cc
index 87c519b3..a010a682 100644
--- a/src/h2load_quic.cc
+++ b/src/h2load_quic.cc
@@ -27,7 +27,6 @@
 #include <iostream>
 
 #include <openssl/err.h>
-#include <openssl/bio.h>
 
 #include "h2load_http3_session.h"
 
@@ -37,13 +36,11 @@ namespace {
 auto randgen = util::make_mt19937();
 } // namespace
 
-ngtcp2_crypto_ctx in_crypto_ctx;
-
 namespace {
 int client_initial(ngtcp2_conn *conn, void *user_data) {
   auto c = static_cast<Client *>(user_data);
 
-  if (c->quic_client_initial() != 0) {
+  if (c->quic_recv_crypto_data(NGTCP2_CRYPTO_LEVEL_INITIAL, nullptr, 0) != 0) {
     return NGTCP2_ERR_CALLBACK_FAILURE;
   }
 
@@ -51,13 +48,6 @@ int client_initial(ngtcp2_conn *conn, void *user_data) {
 }
 } // namespace
 
-int Client::quic_client_initial() {
-  if (quic_tls_handshake(true) != 0) {
-    return -1;
-  }
-  return 0;
-}
-
 namespace {
 int recv_crypto_data(ngtcp2_conn *conn, ngtcp2_crypto_level crypto_level,
                      uint64_t offset, const uint8_t *data, size_t datalen,
@@ -74,20 +64,8 @@ int recv_crypto_data(ngtcp2_conn *conn, ngtcp2_crypto_level crypto_level,
 
 int Client::quic_recv_crypto_data(ngtcp2_crypto_level crypto_level,
                                   const uint8_t *data, size_t datalen) {
-  if (quic_write_server_handshake(crypto_level, data, datalen) != 0) {
-    return -1;
-  }
-
-  if (!ngtcp2_conn_get_handshake_completed(quic.conn)) {
-    if (quic_tls_handshake() != 0) {
-      return -1;
-    }
-    return 0;
-  }
-
-  // SSL_do_handshake() might not consume all data (e.g.,
-  // NewSessionTicket).
-  return quic_read_tls();
+  return ngtcp2_crypto_read_write_crypto_data(quic.conn, ssl, crypto_level,
+                                              data, datalen);
 }
 
 namespace {
@@ -102,12 +80,7 @@ int handshake_completed(ngtcp2_conn *conn, void *user_data) {
 }
 } // namespace
 
-int Client::quic_handshake_completed() {
-  quic.tx_crypto_level = NGTCP2_CRYPTO_LEVEL_APP;
-
-  // TODO Create Http3Session here.
-  return connection_made();
-}
+int Client::quic_handshake_completed() { return connection_made(); }
 
 namespace {
 int recv_retry(ngtcp2_conn *conn, const ngtcp2_pkt_hd *hd,
@@ -124,136 +97,6 @@ int recv_retry(ngtcp2_conn *conn, const ngtcp2_pkt_hd *hd,
 }
 } // namespace
 
-namespace {
-int in_encrypt(ngtcp2_conn *conn, uint8_t *dest, const uint8_t *plaintext,
-               size_t plaintextlen, const uint8_t *key, const uint8_t *nonce,
-               size_t noncelen, const uint8_t *ad, size_t adlen,
-               void *user_data) {
-  auto c = static_cast<Client *>(user_data);
-
-  if (c->quic_in_encrypt(dest, plaintext, plaintextlen, key, nonce, noncelen,
-                         ad, adlen) != 0) {
-    return NGTCP2_ERR_CALLBACK_FAILURE;
-  }
-
-  return 0;
-}
-} // namespace
-
-int Client::quic_in_encrypt(uint8_t *dest, const uint8_t *plaintext,
-                            size_t plaintextlen, const uint8_t *key,
-                            const uint8_t *nonce, size_t noncelen,
-                            const uint8_t *ad, size_t adlen) {
-  return ngtcp2_crypto_encrypt(dest, &in_crypto_ctx.aead, plaintext,
-                               plaintextlen, key, nonce, noncelen, ad, adlen);
-}
-
-namespace {
-int in_decrypt(ngtcp2_conn *conn, uint8_t *dest, const uint8_t *ciphertext,
-               size_t ciphertextlen, const uint8_t *key, const uint8_t *nonce,
-               size_t noncelen, const uint8_t *ad, size_t adlen,
-               void *user_data) {
-  auto c = static_cast<Client *>(user_data);
-
-  if (c->quic_in_decrypt(dest, ciphertext, ciphertextlen, key, nonce, noncelen,
-                         ad, adlen) != 0) {
-    return NGTCP2_ERR_TLS_DECRYPT;
-  }
-
-  return 0;
-}
-} // namespace
-
-int Client::quic_in_decrypt(uint8_t *dest, const uint8_t *ciphertext,
-                            size_t ciphertextlen, const uint8_t *key,
-                            const uint8_t *nonce, size_t noncelen,
-                            const uint8_t *ad, size_t adlen) {
-  return ngtcp2_crypto_decrypt(dest, &in_crypto_ctx.aead, ciphertext,
-                               ciphertextlen, key, nonce, noncelen, ad, adlen);
-}
-
-namespace {
-int encrypt(ngtcp2_conn *conn, uint8_t *dest, const uint8_t *plaintext,
-            size_t plaintextlen, const uint8_t *key, const uint8_t *nonce,
-            size_t noncelen, const uint8_t *ad, size_t adlen, void *user_data) {
-  auto c = static_cast<Client *>(user_data);
-
-  if (c->quic_encrypt(dest, plaintext, plaintextlen, key, nonce, noncelen, ad,
-                      adlen) != 0) {
-    return NGTCP2_ERR_CALLBACK_FAILURE;
-  }
-
-  return 0;
-}
-} // namespace
-
-int Client::quic_encrypt(uint8_t *dest, const uint8_t *plaintext,
-                         size_t plaintextlen, const uint8_t *key,
-                         const uint8_t *nonce, size_t noncelen,
-                         const uint8_t *ad, size_t adlen) {
-  return ngtcp2_crypto_encrypt(dest, &quic.crypto_ctx.aead, plaintext,
-                               plaintextlen, key, nonce, noncelen, ad, adlen);
-}
-
-namespace {
-int decrypt(ngtcp2_conn *conn, uint8_t *dest, const uint8_t *ciphertext,
-            size_t ciphertextlen, const uint8_t *key, const uint8_t *nonce,
-            size_t noncelen, const uint8_t *ad, size_t adlen, void *user_data) {
-  auto c = static_cast<Client *>(user_data);
-
-  if (c->quic_decrypt(dest, ciphertext, ciphertextlen, key, nonce, noncelen, ad,
-                      adlen) != 0) {
-    return NGTCP2_ERR_TLS_DECRYPT;
-  }
-
-  return 0;
-}
-} // namespace
-
-int Client::quic_decrypt(uint8_t *dest, const uint8_t *ciphertext,
-                         size_t ciphertextlen, const uint8_t *key,
-                         const uint8_t *nonce, size_t noncelen,
-                         const uint8_t *ad, size_t adlen) {
-  return ngtcp2_crypto_decrypt(dest, &quic.crypto_ctx.aead, ciphertext,
-                               ciphertextlen, key, nonce, noncelen, ad, adlen);
-}
-
-namespace {
-int in_hp_mask(ngtcp2_conn *conn, uint8_t *dest, const uint8_t *key,
-               const uint8_t *sample, void *user_data) {
-  auto c = static_cast<Client *>(user_data);
-
-  if (c->quic_in_hp_mask(dest, key, sample) != 0) {
-    return NGTCP2_ERR_CALLBACK_FAILURE;
-  }
-
-  return 0;
-}
-} // namespace
-
-int Client::quic_in_hp_mask(uint8_t *dest, const uint8_t *key,
-                            const uint8_t *sample) {
-  return ngtcp2_crypto_hp_mask(dest, &in_crypto_ctx.hp, key, sample);
-}
-
-namespace {
-int hp_mask(ngtcp2_conn *conn, uint8_t *dest, const uint8_t *key,
-            const uint8_t *sample, void *user_data) {
-  auto c = static_cast<Client *>(user_data);
-
-  if (c->quic_hp_mask(dest, key, sample) != 0) {
-    return NGTCP2_ERR_CALLBACK_FAILURE;
-  }
-
-  return 0;
-}
-} // namespace
-
-int Client::quic_hp_mask(uint8_t *dest, const uint8_t *key,
-                         const uint8_t *sample) {
-  return ngtcp2_crypto_hp_mask(dest, &quic.crypto_ctx.hp, key, sample);
-}
-
 namespace {
 int recv_stream_data(ngtcp2_conn *conn, int64_t stream_id, int fin,
                      uint64_t offset, const uint8_t *data, size_t datalen,
@@ -393,119 +236,67 @@ ngtcp2_tstamp timestamp(struct ev_loop *loop) {
 } // namespace
 
 namespace {
-int bio_write(BIO *b, const char *buf, int len) {
-  assert(0);
-  return -1;
-}
-} // namespace
-
-namespace {
-int bio_read(BIO *b, char *buf, int len) {
-  BIO_clear_retry_flags(b);
-
-  auto c = static_cast<Client *>(BIO_get_data(b));
-
-  len = c->quic_read_server_handshake(reinterpret_cast<uint8_t *>(buf), len);
-  if (len == 0) {
-    BIO_set_retry_read(b);
-    return -1;
-  }
-
-  return len;
-}
-} // namespace
-
-namespace {
-int bio_puts(BIO *b, const char *str) { return bio_write(b, str, strlen(str)); }
-} // namespace
-
-namespace {
-int bio_gets(BIO *b, char *buf, int len) { return -1; }
-} // namespace
-
-namespace {
-long bio_ctrl(BIO *b, int cmd, long num, void *ptr) {
-  switch (cmd) {
-  case BIO_CTRL_FLUSH:
-    return 1;
-  }
-
-  return 0;
-}
-} // namespace
-
-namespace {
-int bio_create(BIO *b) {
-  BIO_set_init(b, 1);
-  return 1;
-}
-} // namespace
-
-namespace {
-int bio_destroy(BIO *b) {
-  if (b == nullptr) {
-    return 0;
-  }
-
-  return 1;
-}
-} // namespace
-
-namespace {
-BIO_METHOD *create_bio_method() {
-  static auto meth = BIO_meth_new(BIO_TYPE_FD, "bio");
-  BIO_meth_set_write(meth, bio_write);
-  BIO_meth_set_read(meth, bio_read);
-  BIO_meth_set_puts(meth, bio_puts);
-  BIO_meth_set_gets(meth, bio_gets);
-  BIO_meth_set_ctrl(meth, bio_ctrl);
-  BIO_meth_set_create(meth, bio_create);
-  BIO_meth_set_destroy(meth, bio_destroy);
-  return meth;
-}
-} // namespace
-
-namespace {
-int key_cb(SSL *ssl, int name, const unsigned char *secret, size_t secretlen,
-           void *arg) {
-  auto c = static_cast<Client *>(arg);
-
-  if (c->quic_on_key(name, secret, secretlen) != 0) {
-    return 0;
-  }
-
-  return 1;
-}
-} // namespace
-
-namespace {
-void msg_cb(int write_p, int version, int content_type, const void *buf,
-            size_t len, SSL *ssl, void *arg) {
-  if (!write_p) {
-    return;
-  }
-
-  auto c = static_cast<Client *>(arg);
-  auto msg = reinterpret_cast<const uint8_t *>(buf);
-
-  switch (content_type) {
-  case SSL3_RT_HANDSHAKE:
-    break;
-  case SSL3_RT_ALERT:
-    assert(len == 2);
-    if (msg[0] != 2 /* FATAL */) {
-      return;
-    }
-    c->quic_set_tls_alert(msg[1]);
-    return;
+ngtcp2_crypto_level from_ossl_level(OSSL_ENCRYPTION_LEVEL ossl_level) {
+  switch (ossl_level) {
+  case ssl_encryption_initial:
+    return NGTCP2_CRYPTO_LEVEL_INITIAL;
+  case ssl_encryption_early_data:
+    return NGTCP2_CRYPTO_LEVEL_EARLY;
+  case ssl_encryption_handshake:
+    return NGTCP2_CRYPTO_LEVEL_HANDSHAKE;
+  case ssl_encryption_application:
+    return NGTCP2_CRYPTO_LEVEL_APP;
   default:
-    return;
+    assert(0);
+  }
+}
+} // namespace
+
+namespace {
+int set_encryption_secrets(SSL *ssl, OSSL_ENCRYPTION_LEVEL ossl_level,
+                           const uint8_t *rx_secret, const uint8_t *tx_secret,
+                           size_t secret_len) {
+  auto c = static_cast<Client *>(SSL_get_app_data(ssl));
+
+  if (c->quic_on_key(from_ossl_level(ossl_level), rx_secret, tx_secret,
+                     secret_len) != 0) {
+    return 0;
   }
 
-  c->quic_write_client_handshake(reinterpret_cast<const uint8_t *>(buf), len);
+  return 1;
 }
 } // namespace
 
+namespace {
+int add_handshake_data(SSL *ssl, OSSL_ENCRYPTION_LEVEL ossl_level,
+                       const uint8_t *data, size_t len) {
+  auto c = static_cast<Client *>(SSL_get_app_data(ssl));
+  c->quic_write_client_handshake(from_ossl_level(ossl_level), data, len);
+  return 1;
+}
+} // namespace
+
+namespace {
+int flush_flight(SSL *ssl) { return 1; }
+} // namespace
+
+namespace {
+int send_alert(SSL *ssl, enum ssl_encryption_level_t level, uint8_t alert) {
+  auto c = static_cast<Client *>(SSL_get_app_data(ssl));
+  c->quic_set_tls_alert(alert);
+  return 1;
+}
+} // namespace
+
+namespace {
+auto quic_method = SSL_QUIC_METHOD{
+    set_encryption_secrets,
+    add_handshake_data,
+    flush_flight,
+    send_alert,
+};
+} // namespace
+
 int Client::quic_init(const sockaddr *local_addr, socklen_t local_addrlen,
                       const sockaddr *remote_addr, socklen_t remote_addrlen) {
   int rv;
@@ -513,15 +304,9 @@ int Client::quic_init(const sockaddr *local_addr, socklen_t local_addrlen,
   if (!ssl) {
     ssl = SSL_new(worker->ssl_ctx);
 
-    auto bio = BIO_new(create_bio_method());
-    BIO_set_data(bio, this);
-
-    SSL_set_bio(ssl, bio, bio);
     SSL_set_app_data(ssl, this);
     SSL_set_connect_state(ssl);
-    SSL_set_msg_callback(ssl, msg_cb);
-    SSL_set_msg_callback_arg(ssl, this);
-    SSL_set_key_callback(ssl, key_cb, this);
+    SSL_set_quic_method(ssl, &quic_method);
   }
 
   switch (remote_addr->sa_family) {
@@ -541,12 +326,9 @@ int Client::quic_init(const sockaddr *local_addr, socklen_t local_addrlen,
       h2load::recv_crypto_data,
       h2load::handshake_completed,
       nullptr, // recv_version_negotiation
-      h2load::in_encrypt,
-      h2load::in_decrypt,
-      h2load::encrypt,
-      h2load::decrypt,
-      h2load::in_hp_mask,
-      h2load::hp_mask,
+      ngtcp2_crypto_encrypt_cb,
+      ngtcp2_crypto_decrypt_cb,
+      ngtcp2_crypto_hp_mask_cb,
       h2load::recv_stream_data,
       nullptr, // acked_crypto_offset
       nullptr, // acked_stream_data_offset
@@ -600,6 +382,25 @@ int Client::quic_init(const sockaddr *local_addr, socklen_t local_addrlen,
     return -1;
   }
 
+  ngtcp2_transport_params params;
+  ngtcp2_conn_get_local_transport_params(quic.conn, &params);
+
+  std::array<uint8_t, 64> buf;
+
+  auto nwrite = ngtcp2_encode_transport_params(
+      buf.data(), buf.size(), NGTCP2_TRANSPORT_PARAMS_TYPE_CLIENT_HELLO,
+      &params);
+  if (nwrite < 0) {
+    std::cerr << "ngtcp2_encode_transport_params: " << ngtcp2_strerror(nwrite)
+              << std::endl;
+    return -1;
+  }
+
+  if (SSL_set_quic_transport_params(ssl, buf.data(), nwrite) != 1) {
+    std::cerr << "SSL_set_quic_transport_params failed" << std::endl;
+    return -1;
+  }
+
   rv = quic_setup_initial_crypto();
   if (rv != 0) {
     ngtcp2_conn_del(quic.conn);
@@ -648,216 +449,55 @@ void Client::quic_close_connection() {
 }
 
 int Client::quic_setup_initial_crypto() {
-  std::array<uint8_t, 32> tx_secret, rx_secret;
   auto dcid = ngtcp2_conn_get_dcid(quic.conn);
-  if (ngtcp2_crypto_derive_initial_secrets(rx_secret.data(), tx_secret.data(),
-                                           nullptr, dcid,
-                                           NGTCP2_CRYPTO_SIDE_CLIENT) != 0) {
-    std::cerr << "ngtcp2_crypto_derive_initial_secrets() failed" << std::endl;
+
+  if (ngtcp2_crypto_derive_and_install_initial_key(
+          quic.conn, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+          nullptr, nullptr, nullptr, dcid, NGTCP2_CRYPTO_SIDE_CLIENT) != 0) {
+    std::cerr << "ngtcp2_crypto_derive_and_install_initial_key() failed"
+              << std::endl;
     return -1;
   }
 
-  auto aead = &in_crypto_ctx.aead;
-  auto md = &in_crypto_ctx.md;
-
-  std::array<uint8_t, 16> key, iv, hp;
-  auto keylen = ngtcp2_crypto_aead_keylen(aead);
-  auto ivlen = ngtcp2_crypto_packet_protection_ivlen(aead);
-  auto hplen = keylen;
-
-  if (ngtcp2_crypto_derive_packet_protection_key(key.data(), iv.data(), aead,
-                                                 md, tx_secret.data(),
-                                                 tx_secret.size()) != 0) {
-    return -1;
-  }
-
-  if (ngtcp2_crypto_derive_header_protection_key(
-          hp.data(), aead, md, tx_secret.data(), tx_secret.size()) != 0) {
-    return -1;
-  }
-
-  ngtcp2_conn_install_initial_tx_keys(quic.conn, key.data(), keylen, iv.data(),
-                                      ivlen, hp.data(), hplen);
-
-  if (ngtcp2_crypto_derive_packet_protection_key(key.data(), iv.data(), aead,
-                                                 md, rx_secret.data(),
-                                                 rx_secret.size()) != 0) {
-    return -1;
-  }
-
-  if (ngtcp2_crypto_derive_header_protection_key(
-          hp.data(), aead, md, rx_secret.data(), rx_secret.size()) != 0) {
-    return -1;
-  }
-
-  ngtcp2_conn_install_initial_rx_keys(quic.conn, key.data(), keylen, iv.data(),
-                                      ivlen, hp.data(), hplen);
-
-  return 0;
-}
-
-int Client::quic_on_key(int name, const uint8_t *secret, size_t secretlen) {
-  switch (name) {
-  case SSL_KEY_CLIENT_EARLY_TRAFFIC:
-  case SSL_KEY_CLIENT_HANDSHAKE_TRAFFIC:
-  case SSL_KEY_SERVER_HANDSHAKE_TRAFFIC:
-  case SSL_KEY_CLIENT_APPLICATION_TRAFFIC:
-  case SSL_KEY_SERVER_APPLICATION_TRAFFIC:
-    break;
-  default:
-    return 0;
-  }
-
-  if (quic.crypto_ctx.aead.native_handle == nullptr) {
-    ngtcp2_crypto_ctx_tls(&quic.crypto_ctx, ssl);
-    ngtcp2_conn_set_aead_overhead(
-        quic.conn, ngtcp2_crypto_aead_taglen(&quic.crypto_ctx.aead));
-  }
-
-  auto aead = &quic.crypto_ctx.aead;
-  auto md = &quic.crypto_ctx.md;
-
-  std::array<uint8_t, 64> key, iv, hp;
-  auto keylen = ngtcp2_crypto_aead_keylen(aead);
-  auto ivlen = ngtcp2_crypto_packet_protection_ivlen(aead);
-  auto hplen = keylen;
-
-  if (ngtcp2_crypto_derive_packet_protection_key(key.data(), iv.data(), aead,
-                                                 md, secret, secretlen) != 0) {
-    return -1;
-  }
-
-  if (ngtcp2_crypto_derive_header_protection_key(hp.data(), aead, md, secret,
-                                                 secretlen) != 0) {
-    return -1;
-  }
-
-  switch (name) {
-  case SSL_KEY_CLIENT_EARLY_TRAFFIC:
-    ngtcp2_conn_install_early_keys(quic.conn, key.data(), keylen, iv.data(),
-                                   ivlen, hp.data(), hplen);
-    break;
-  case SSL_KEY_CLIENT_HANDSHAKE_TRAFFIC:
-    ngtcp2_conn_install_handshake_tx_keys(quic.conn, key.data(), keylen,
-                                          iv.data(), ivlen, hp.data(), hplen);
-    quic.tx_crypto_level = NGTCP2_CRYPTO_LEVEL_HANDSHAKE;
-    break;
-  case SSL_KEY_CLIENT_APPLICATION_TRAFFIC:
-    ngtcp2_conn_install_tx_keys(quic.conn, key.data(), keylen, iv.data(), ivlen,
-                                hp.data(), hplen);
-    break;
-  case SSL_KEY_SERVER_HANDSHAKE_TRAFFIC:
-    ngtcp2_conn_install_handshake_rx_keys(quic.conn, key.data(), keylen,
-                                          iv.data(), ivlen, hp.data(), hplen);
-    quic.rx_crypto_level = NGTCP2_CRYPTO_LEVEL_HANDSHAKE;
-    break;
-  case SSL_KEY_SERVER_APPLICATION_TRAFFIC:
-    ngtcp2_conn_install_rx_keys(quic.conn, key.data(), keylen, iv.data(), ivlen,
-                                hp.data(), hplen);
-    quic.rx_crypto_level = NGTCP2_CRYPTO_LEVEL_APP;
-    break;
-  }
-
   return 0;
 }
 
-int Client::quic_tls_handshake(bool initial) {
-  ERR_clear_error();
+int Client::quic_on_key(ngtcp2_crypto_level level, const uint8_t *rx_secret,
+                        const uint8_t *tx_secret, size_t secretlen) {
+  if (ngtcp2_crypto_derive_and_install_key(
+          quic.conn, ssl, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr,
+          level, rx_secret, tx_secret, secretlen,
+          NGTCP2_CRYPTO_SIDE_CLIENT) != 0) {
+    std::cerr << "ngtcp2_crypto_derive_and_install_key() failed" << std::endl;
+    return -1;
+  }
 
-  int rv;
-
-  rv = SSL_do_handshake(ssl);
-  if (rv <= 0) {
-    auto err = SSL_get_error(ssl, rv);
-    switch (err) {
-    case SSL_ERROR_WANT_READ:
-    case SSL_ERROR_WANT_WRITE:
-      return 0;
-    case SSL_ERROR_SSL:
-      std::cerr << "TLS handshake error: "
-                << ERR_error_string(ERR_get_error(), nullptr) << std::endl;
-      return -1;
-    default:
-      std::cerr << "TLS handshake error: " << err << std::endl;
+  if (level == NGTCP2_CRYPTO_LEVEL_APP) {
+    auto s = std::make_unique<Http3Session>(this);
+    if (s->init_conn() == -1) {
       return -1;
     }
-  }
-
-  ngtcp2_conn_handshake_completed(quic.conn);
-
-  if (quic_read_tls() != 0) {
-    return -1;
+    session = std::move(s);
   }
 
   return 0;
 }
 
-int Client::quic_read_tls() {
-  ERR_clear_error();
-
-  std::array<uint8_t, 4096> buf;
-  size_t nread;
-
-  for (;;) {
-    auto rv = SSL_read_ex(ssl, buf.data(), buf.size(), &nread);
-    if (rv == 1) {
-      continue;
-    }
-    auto err = SSL_get_error(ssl, 0);
-    switch (err) {
-    case SSL_ERROR_WANT_READ:
-    case SSL_ERROR_WANT_WRITE:
-      return 0;
-    case SSL_ERROR_SSL:
-    case SSL_ERROR_ZERO_RETURN:
-      std::cerr << "TLS read error: "
-                << ERR_error_string(ERR_get_error(), nullptr) << std::endl;
-      return NGTCP2_ERR_CRYPTO;
-    default:
-      std::cerr << "TLS read error: " << err << std::endl;
-      return NGTCP2_ERR_CRYPTO;
-    }
-  }
-}
-
 void Client::quic_set_tls_alert(uint8_t alert) {
   quic.last_error = quic::err_transport_tls(alert);
 }
 
-size_t Client::quic_read_server_handshake(uint8_t *buf, size_t buflen) {
-  auto n = std::min(buflen,
-                    quic.server_handshake.size() - quic.server_handshake_nread);
-  std::copy_n(std::begin(quic.server_handshake) + quic.server_handshake_nread,
-              n, buf);
-  quic.server_handshake_nread += n;
-  return n;
-}
-
-int Client::quic_write_server_handshake(ngtcp2_crypto_level crypto_level,
-                                        const uint8_t *data, size_t datalen) {
-  if (quic.rx_crypto_level != crypto_level) {
-    std::cerr << "Got crypto level "
-              << ", want " << quic.rx_crypto_level << std::endl;
-    return -1;
-  }
-  std::copy_n(data, datalen, std::back_inserter(quic.server_handshake));
-  return 0;
-}
-
-void Client::quic_write_client_handshake(const uint8_t *data, size_t datalen) {
-  assert(quic.tx_crypto_level < 2);
-  quic_write_client_handshake(quic.crypto[quic.tx_crypto_level], data, datalen);
-}
-
-void Client::quic_write_client_handshake(Crypto &crypto, const uint8_t *data,
-                                         size_t datalen) {
+void Client::quic_write_client_handshake(ngtcp2_crypto_level level,
+                                         const uint8_t *data, size_t datalen) {
+  assert(level < 2);
+  auto &crypto = quic.crypto[level];
   assert(crypto.data.size() >= crypto.datalen + datalen);
 
   auto p = std::begin(crypto.data) + crypto.datalen;
   std::copy_n(data, datalen, p);
   crypto.datalen += datalen;
 
-  ngtcp2_conn_submit_crypto_data(quic.conn, quic.tx_crypto_level, p, datalen);
+  ngtcp2_conn_submit_crypto_data(quic.conn, level, p, datalen);
 }
 
 void quic_pkt_timeout_cb(struct ev_loop *loop, ev_timer *w, int revents) {