1 files changed, 138 insertions, 0 deletions
diff --git a/src/common/openssl_opts_handler.cc b/src/common/openssl_opts_handler.cc
new file mode 100644
index 000000000..c0164dc7b
--- /dev/null
+++ b/src/common/openssl_opts_handler.cc
@@ -0,0 +1,138 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (c) 2020 Huawei Technologies Co., Ltd.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ */
+
+#include "openssl_opts_handler.h"
+
+#include <openssl/bio.h>
+#include <openssl/conf.h>
+#include <openssl/engine.h>
+#include <mutex>
+#include <vector>
+#include <algorithm>
+
+#include "common/debug.h"
+#include "global/global_context.h"
+#include "include/str_list.h"
+#include "include/scope_guard.h"
+
+using std::string;
+using std::vector;
+
+// -----------------------------------------------------------------------------
+#define dout_context g_ceph_context
+#define dout_subsys ceph_subsys_common
+#undef dout_prefix
+#define dout_prefix _prefix(_dout)
+
+static ostream &_prefix(std::ostream *_dout)
+{
+  return *_dout << "OpenSSLOptsHandler: ";
+}
+// -----------------------------------------------------------------------------
+
+string construct_engine_conf(const string &opts)
+{
+  const string conf_header = "openssl_conf=openssl_def\n[openssl_def]\n";
+  const string engine_header = "engines=engine_section\n[engine_section]\n";
+
+  string engine_id, engine_statement, engine_detail;
+  const string id_prefix = "engine";
+  const string suffix = "_section";
+  const char delimiter = '\n';
+
+  int index = 1;
+  vector<string> confs = get_str_vec(opts, ":");
+  for (auto conf : confs) {
+    // Construct engine section statement like "engine1=engine1_section"
+    engine_id = id_prefix + to_string(index++);
+    engine_statement += engine_id + "=" + engine_id + suffix + delimiter;
+
+    // Adapt to OpenSSL parser
+    // Replace ',' with '\n' and add section in front
+    std::replace(conf.begin(), conf.end(), ',', delimiter);
+    engine_detail += "[" + engine_id + suffix + "]" + delimiter;
+    engine_detail += conf + delimiter;
+  }
+
+  return conf_header + engine_header + engine_statement + engine_detail;
+}
+
+string get_openssl_error()
+{
+  BIO *bio = BIO_new(BIO_s_mem());
+  if (bio == nullptr) {
+    return "failed to create BIO for more error printing";
+  }
+  ERR_print_errors(bio);
+  char* buf;
+  size_t len = BIO_get_mem_data(bio, &buf);
+  string ret(buf, len);
+  BIO_free(bio);
+  return ret;
+}
+
+void log_error(const string &err)
+{
+  derr << "Intended OpenSSL engine acceleration failed.\n"
+       << "set by openssl_engine_opts = "
+       << g_ceph_context->_conf->openssl_engine_opts
+       << "\ndetail error information:\n" << err << dendl;
+}
+
+void load_module(const string &engine_conf)
+{
+  BIO *mem = BIO_new_mem_buf(engine_conf.c_str(), engine_conf.size());
+  if (mem == nullptr) {
+    log_error("failed to new BIO memory");
+    return;
+  }
+  auto sg_mem = make_scope_guard([&mem] { BIO_free(mem); });
+
+  CONF *conf = NCONF_new(nullptr);
+  if (conf == nullptr) {
+    log_error("failed to new OpenSSL CONF");
+    return;
+  }
+  auto sg_conf = make_scope_guard([&conf] { NCONF_free(conf); });
+
+  if (NCONF_load_bio(conf, mem, nullptr) <= 0) {
+    log_error("failed to load CONF from BIO:\n" + get_openssl_error());
+    return;
+  }
+
+  OPENSSL_load_builtin_modules();
+  ENGINE_load_builtin_engines();
+
+  if (CONF_modules_load(
+          conf, nullptr,
+          CONF_MFLAGS_DEFAULT_SECTION | CONF_MFLAGS_IGNORE_MISSING_FILE) <= 0) {
+    log_error("failed to load modules from CONF:\n" + get_openssl_error());
+  }
+}
+
+void init_engine()
+{
+  string opts = g_ceph_context->_conf->openssl_engine_opts;
+  if (opts.empty()) {
+    return;
+  }
+  string engine_conf = construct_engine_conf(opts);
+  load_module(engine_conf);
+}
+
+void ceph::crypto::init_openssl_engine_once()
+{
+  static std::once_flag flag;
+  std::call_once(flag, init_engine);
+}