[Upstream] deps: add handling for x509 and client hello cb

This commit will need to be submitted upstream then backed out
once it lands and we can update

PR-URL: nodejs#138
Reviewed-By: Anna Henningsen <anna@addaleax.net>

Author: jasnell

deps/ngtcp2/crypto/openssl/openssl.c

@@ -318,6 +318,10 @@ int ngtcp2_crypto_read_write_crypto_data(ngtcp2_conn *conn, void *tls,
       case SSL_ERROR_WANT_READ:
       case SSL_ERROR_WANT_WRITE:
         return 0;
+      case SSL_ERROR_WANT_CLIENT_HELLO_CB:
+        return NGTCP2_ERR_TLS_WANT_CLIENT_HELLO_CB;
+      case SSL_ERROR_WANT_X509_LOOKUP:
+        return NGTCP2_ERR_TLS_WANT_X509_LOOKUP;
       case SSL_ERROR_SSL:
         return -1;
       default:

deps/ngtcp2/lib/includes/ngtcp2/ngtcp2.h

@@ -248,6 +248,8 @@ typedef enum ngtcp2_lib_error {
   NGTCP2_ERR_INTERNAL = -238,
   NGTCP2_ERR_CRYPTO_BUFFER_EXCEEDED = -239,
   NGTCP2_ERR_WRITE_STREAM_MORE = -240,
+  NGTCP2_ERR_TLS_WANT_X509_LOOKUP = -241,
+  NGTCP2_ERR_TLS_WANT_CLIENT_HELLO_CB = -242,
   NGTCP2_ERR_FATAL = -500,
   NGTCP2_ERR_NOMEM = -501,
   NGTCP2_ERR_CALLBACK_FAILURE = -502,