gen_ssl_cert: new tool to generate SSL certs for Monero

src/CMakeLists.txt

@@ -129,6 +129,7 @@ add_subdirectory(cryptonote_protocol)
 if(NOT IOS)
   add_subdirectory(simplewallet)
   add_subdirectory(gen_multisig)
+  add_subdirectory(gen_ssl_cert)
   add_subdirectory(daemonizer)
   add_subdirectory(daemon)
   add_subdirectory(blockchain_utilities)

src/gen_ssl_cert/CMakeLists.txt

@@ -0,0 +1,49 @@
+# Copyright (c) 2017-2019, The Monero Project
+#
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without modification, are
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of source code must retain the above copyright notice, this list of
+#    conditions and the following disclaimer.
+#
+# 2. Redistributions in binary form must reproduce the above copyright notice, this list
+#    of conditions and the following disclaimer in the documentation and/or other
+#    materials provided with the distribution.
+#
+# 3. Neither the name of the copyright holder nor the names of its contributors may be
+#    used to endorse or promote products derived from this software without specific
+#    prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set(gen_ssl_cert_sources
+  gen_ssl_cert.cpp)
+
+monero_add_executable(gen_ssl_cert
+  ${gen_ssl_cert_sources})
+target_link_libraries(gen_ssl_cert
+  PRIVATE
+    common
+    epee
+    version
+    ${EPEE_READLINE}
+    ${Boost_PROGRAM_OPTIONS_LIBRARY}
+    ${Boost_FILESYSTEM_LIBRARY}
+    ${CMAKE_THREAD_LIBS_INIT}
+    ${EXTRA_LIBRARIES})
+add_dependencies(gen_ssl_cert
+  version)
+set_property(TARGET gen_ssl_cert
+  PROPERTY
+    OUTPUT_NAME "monero-gen-ssl-cert")
+install(TARGETS gen_ssl_cert DESTINATION bin)

src/gen_ssl_cert/gen_ssl_cert.cpp

@@ -0,0 +1,254 @@
+// Copyright (c) 2019, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <boost/program_options.hpp>
+#include <boost/format.hpp>
+#include <boost/algorithm/string.hpp>
+#include <openssl/ssl.h>
+#include <openssl/pem.h>
+#include "include_base_utils.h"
+#include "file_io_utils.h"
+#include "net/net_ssl.h"
+#include "crypto/crypto.h"
+#include "common/util.h"
+#include "common/i18n.h"
+#include "common/command_line.h"
+#include "common/scoped_message_writer.h"
+#include "common/password.h"
+#include "version.h"
+
+namespace po = boost::program_options;
+
+#undef MONERO_DEFAULT_LOG_CATEGORY
+#define MONERO_DEFAULT_LOG_CATEGORY "gen_ssl_cert"
+
+namespace gencert
+{
+  const char* tr(const char* str)
+  {
+    return i18n_translate(str, "tools::gen_ssl_cert");
+  }
+
+}
+
+namespace
+{
+  const command_line::arg_descriptor<std::string> arg_certificate_filename = {"certificate-filename", gencert::tr("Filename to save the certificate"), ""};
+  const command_line::arg_descriptor<std::string> arg_private_key_filename = {"private-key-filename", gencert::tr("Filename to save the private key"), ""};
+  const command_line::arg_descriptor<std::string> arg_passphrase = {"passphrase", gencert::tr("Passphrase with which to encrypt the private key"), ""};
+  const command_line::arg_descriptor<std::string> arg_passphrase_file = {"passphrase-file", gencert::tr("File containing the passphrase with which to encrypt the private key"), ""};
+  const command_line::arg_descriptor<bool> arg_prompt_for_passphrase = {"prompt-for-passphrase", gencert::tr("Prompt for a passphrase with which to encrypt the private key"), false};
+}
+
+// adapted from openssl's apps/x509.c
+static std::string get_fingerprint(X509 *cert, const EVP_MD *fdig)
+{
+  unsigned int j;
+  unsigned int n;
+  unsigned char md[EVP_MAX_MD_SIZE];
+  std::string fingerprint;
+
+  if (!X509_digest(cert, fdig, md, &n))
+  {
+    tools::fail_msg_writer() << tr("Failed to create fingerprint: ") << ERR_reason_error_string(ERR_get_error());
+    return fingerprint;
+  }
+  fingerprint.resize(n * 3 - 1);
+  char *out = &fingerprint[0];
+  for (j = 0; j < n; ++j)
+  {
+    snprintf(out, 3 + (j + 1 < n), "%02X%s", md[j], (j + 1 == n) ? "" : ":");
+    out += 3;
+  }
+  return fingerprint;
+}
+
+int main(int argc, char* argv[])
+{
+  TRY_ENTRY();
+
+  tools::on_startup();
+
+  po::options_description desc_cmd_only("Command line options");
+  po::options_description desc_cmd_sett("Command line options and settings options");
+
+  command_line::add_arg(desc_cmd_sett, arg_certificate_filename);
+  command_line::add_arg(desc_cmd_sett, arg_private_key_filename);
+  command_line::add_arg(desc_cmd_sett, arg_passphrase);
+  command_line::add_arg(desc_cmd_sett, arg_passphrase_file);
+  command_line::add_arg(desc_cmd_sett, arg_prompt_for_passphrase);
+
+  command_line::add_arg(desc_cmd_only, command_line::arg_help);
+  command_line::add_arg(desc_cmd_only, command_line::arg_version);
+
+  po::options_description desc_options("Allowed options");
+  desc_options.add(desc_cmd_only).add(desc_cmd_sett);
+
+  po::variables_map vm;
+  bool r = command_line::handle_error_helper(desc_options, [&]()
+  {
+    po::store(po::parse_command_line(argc, argv, desc_options), vm);
+    po::notify(vm);
+    return true;
+  });
+  if (!r)
+    return 1;
+
+  if (command_line::get_arg(vm, command_line::arg_help))
+  {
+    std::cout << "Monero '" << MONERO_RELEASE_NAME << "' (v" << MONERO_VERSION_FULL << ")" << ENDL << ENDL;
+    std::cout << desc_options << std::endl;
+    return 0;
+  }
+  if (command_line::get_arg(vm, command_line::arg_version))
+  {
+    std::cout << "Monero '" << MONERO_RELEASE_NAME << "' (v" << MONERO_VERSION_FULL << ")" << ENDL;
+    return 0;
+  }
+
+  const std::string certificate_filename = command_line::get_arg(vm, arg_certificate_filename);
+  if (certificate_filename.empty())
+  {
+    tools::fail_msg_writer() << gencert::tr("Argument is needed: ") << "--" << arg_certificate_filename.name;
+    return 1;
+  }
+  const std::string private_key_filename = command_line::get_arg(vm, arg_private_key_filename);
+  if (private_key_filename.empty())
+  {
+    tools::fail_msg_writer() << gencert::tr("Argument is needed: ") << "--" << arg_private_key_filename.name;
+    return 1;
+  }
+
+  epee::wipeable_string private_key_passphrase;
+  if (command_line::get_arg(vm, arg_prompt_for_passphrase))
+  {
+    auto pwd_container = tools::password_container::prompt(true, "Enter passphrase for the new SSL private key");
+    if (!pwd_container)
+    {
+      tools::fail_msg_writer() << gencert::tr("Failed to read passphrase");
+      return 1;
+    }
+    private_key_passphrase = pwd_container->password();
+  }
+  else if (!command_line::is_arg_defaulted(vm, arg_passphrase_file))
+  {
+    std::string passphrase_file = command_line::get_arg(vm, arg_passphrase_file);
+    if (!passphrase_file.empty())
+    {
+      std::string passphrase;
+      if (!epee::file_io_utils::load_file_to_string(passphrase_file, passphrase))
+      { 
+        MERROR("Failed to load passphrase");
+        return 1;
+      }
+
+      // Remove line breaks the user might have inserted
+      boost::trim_right_if(passphrase, boost::is_any_of("\r\n"));
+      private_key_passphrase = passphrase;
+      memwipe(&passphrase[0], passphrase.size());
+    }
+  }
+  else
+  {
+    private_key_passphrase = command_line::get_arg(vm, arg_passphrase);
+  }
+  if (private_key_passphrase.empty())
+    tools::msg_writer(epee::console_color_yellow) << (boost::format(tr("Empty passphrase, the private key will be saved to disk unencrypted, use --%s to set a passphrase or --%s to prompt for one")) % arg_passphrase.name % arg_prompt_for_passphrase.name).str();
+
+  EVP_PKEY *pkey;
+  X509 *cert;
+  r = epee::net_utils::create_rsa_ssl_certificate(pkey, cert);
+  if (!r)
+  {
+    tools::fail_msg_writer() << gencert::tr("Failed to create certificate");
+    return 1;
+  }
+
+  // write cert
+  BIO *bio_cert = BIO_new(BIO_s_mem());
+  r = PEM_write_bio_X509(bio_cert, cert);
+  if (!r)
+  {
+    BIO_free(bio_cert);
+    tools::fail_msg_writer() << gencert::tr("Failed to write certificate: ") << ERR_reason_error_string(ERR_get_error());
+    return 1;
+  }
+  BUF_MEM *buf = NULL;
+  BIO_get_mem_ptr(bio_cert, &buf);
+  if (!buf || !buf->data || !buf->length)
+  {
+    BIO_free(bio_cert);
+    tools::fail_msg_writer() << gencert::tr("Failed to write certificate: ") << ERR_reason_error_string(ERR_get_error());
+    return 1;
+  }
+  const std::string certificate(std::string(buf->data, buf->length));
+  BIO_free(bio_cert);
+
+  // write private key
+  BIO *bio_pkey = BIO_new(BIO_s_mem());
+  r = PEM_write_bio_PKCS8PrivateKey(bio_pkey, pkey, private_key_passphrase.empty() ? NULL : EVP_aes_128_cfb(), private_key_passphrase.data(), private_key_passphrase.size(), NULL, NULL);
+  if (!r)
+  {
+    BIO_free(bio_pkey);
+    tools::fail_msg_writer() << gencert::tr("Failed to write private key: ") << ERR_reason_error_string(ERR_get_error());
+    return 1;
+  }
+  buf = NULL;
+  BIO_get_mem_ptr(bio_pkey, &buf);
+  if (!buf || !buf->data || !buf->length)
+  {
+    BIO_free(bio_pkey);
+    tools::fail_msg_writer() << gencert::tr("Failed to write private key: ") << ERR_reason_error_string(ERR_get_error());
+    return 1;
+  }
+  const std::string private_key(std::string(buf->data, buf->length));
+  BIO_free(bio_pkey);
+
+  // write files
+  tools::set_strict_default_file_permissions(true);
+  r = epee::file_io_utils::save_string_to_file(certificate_filename, certificate);
+  if (!r)
+  {
+    tools::fail_msg_writer() << gencert::tr("Failed to save certificate file");
+    return 1;
+  }
+  r = epee::file_io_utils::save_string_to_file(private_key_filename, private_key);
+  if (!r)
+  {
+    tools::fail_msg_writer() << gencert::tr("Failed to save private key file");
+    return 1;
+  }
+
+  tools::success_msg_writer() << tr("New certificate created:");
+  tools::success_msg_writer() << tr("Certificate: ") << certificate_filename;
+  tools::success_msg_writer() << tr("SHA-256 Fingerprint: ") << get_fingerprint(cert, EVP_sha256());
+  tools::success_msg_writer() << tr("Private key: ") << private_key_filename << " (" << (private_key_passphrase.empty() ? "unencrypted" : "encrypted") << ")";
+
+  return 0;
+  CATCH_ENTRY_L0("main", 1);
+}