~singpolyma/biboumi

ref: a13285d0ff360d0a83e007a776d9efbcfc347c76 biboumi/louloulibs/network/credentials_manager.cpp -rw-r--r-- 3.4 KiB
a13285d0 — Florent Le Coz Rename BasicCredentialManager 8 years ago
                                                                                
06db9b36 Florent Le Coz
e8386bd1 Florent Le Coz
f928f762 Florent Le Coz
06db9b36 Florent Le Coz
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e8386bd1 Florent Le Coz
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a13285d0 Florent Le Coz
e8386bd1 Florent Le Coz
a13285d0 Florent Le Coz
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f928f762 Florent Le Coz
e8386bd1 Florent Le Coz
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a13285d0 Florent Le Coz
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e8386bd1 Florent Le Coz
1f8333f2 Florent Le Coz
e8386bd1 Florent Le Coz
f928f762 Florent Le Coz
e8386bd1 Florent Le Coz
a13285d0 Florent Le Coz
f928f762 Florent Le Coz
e8386bd1 Florent Le Coz
a13285d0 Florent Le Coz
e8386bd1 Florent Le Coz
5ce9d3f1 Florent Le Coz
f928f762 Florent Le Coz
5ce9d3f1 Florent Le Coz
a13285d0 Florent Le Coz
5ce9d3f1 Florent Le Coz
f928f762 Florent Le Coz
5ce9d3f1 Florent Le Coz
f928f762 Florent Le Coz
5ce9d3f1 Florent Le Coz
a13285d0 Florent Le Coz
f928f762 Florent Le Coz
e8386bd1 Florent Le Coz
a13285d0 Florent Le Coz
f928f762 Florent Le Coz
06db9b36 Florent Le Coz
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#include "louloulibs.h"

#ifdef BOTAN_FOUND
#include <network/tcp_socket_handler.hpp>
#include <network/credentials_manager.hpp>
#include <logger/logger.hpp>
#include <botan/tls_exceptn.h>
#include <config/config.hpp>

#ifdef USE_DATABASE
# include <database/database.hpp>
#endif

/**
 * TODO find a standard way to find that out.
 */
static const std::vector<std::string> default_cert_files = {
    "/etc/ssl/certs/ca-bundle.crt",
    "/etc/pki/tls/certs/ca-bundle.crt",
    "/etc/ssl/certs/ca-certificates.crt",
    "/etc/ca-certificates/extracted/tls-ca-bundle.pem"
};

Botan::Certificate_Store_In_Memory BasicCredentialsManager::certificate_store;
bool BasicCredentialsManager::certs_loaded = false;

BasicCredentialsManager::BasicCredentialsManager(const TCPSocketHandler* const socket_handler):
    Botan::Credentials_Manager(),
    socket_handler(socket_handler),
    trusted_fingerprint{}
{
  this->load_certs();
}

void BasicCredentialsManager::set_trusted_fingerprint(const std::string& fingerprint)
{
  this->trusted_fingerprint = fingerprint;
}

void BasicCredentialsManager::verify_certificate_chain(const std::string& type,
                                                       const std::string& purported_hostname,
                                                       const std::vector<Botan::X509_Certificate>& certs)
{
  log_debug("Checking remote certificate (" << type << ") for hostname " << purported_hostname);
  try
    {
      Botan::Credentials_Manager::verify_certificate_chain(type, purported_hostname, certs);
      log_debug("Certificate is valid");
    }
  catch (const std::exception& tls_exception)
    {
      log_warning("TLS certificate check failed: " << tls_exception.what());
      if (!this->trusted_fingerprint.empty() && !certs.empty() &&
          this->trusted_fingerprint == certs[0].fingerprint() &&
          certs[0].matches_dns_name(purported_hostname))
        // We trust the certificate, based on the trusted fingerprint and
        // the fact that the hostname matches
        return;

      if (this->socket_handler->abort_on_invalid_cert())
        throw;
    }
}

void BasicCredentialsManager::load_certs()
{
  //  Only load the certificates the first time
  if (BasicCredentialsManager::certs_loaded)
    return;
  const std::string conf_path = Config::get("ca_file", "");
  std::vector<std::string> paths;
  if (conf_path.empty())
    paths = default_cert_files;
  else
    paths.push_back(conf_path);
  for (const auto& path: paths)
    {
      try
        {
          Botan::DataSource_Stream bundle(path);
          log_debug("Using ca bundle: " << path);
          while (!bundle.end_of_data() && bundle.check_available(27))
            {
              const Botan::X509_Certificate cert(bundle);
              BasicCredentialsManager::certificate_store.add_certificate(cert);
            }
          // Only use the first file that can successfully be read.
          goto success;
        }
      catch (Botan::Stream_IO_Error& e)
        {
          log_debug(e.what());
        }
    }
  //  If we could not open one of the files, print a warning
  log_warning("The CA could not be loaded, TLS negociation will probably fail.");
  success:
  BasicCredentialsManager::certs_loaded = true;
}

std::vector<Botan::Certificate_Store*> BasicCredentialsManager::trusted_certificate_authorities(const std::string&, const std::string&)
{
  return {&this->certificate_store};
}

#endif