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epee: add SSL support

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RPC connections now have optional tranparent SSL.

An optional private key and certificate file can be passed,
using the --{rpc,daemon}-ssl-private-key and
--{rpc,daemon}-ssl-certificate options. Those have as
argument a path to a PEM format private private key and
certificate, respectively.
If not given, a temporary self signed certificate will be used.

SSL can be enabled or disabled using --{rpc}-ssl, which
accepts autodetect (default), disabled or enabled.

Access can be restricted to particular certificates using the
--rpc-ssl-allowed-certificates, which takes a list of
paths to PEM encoded certificates. This can allow a wallet to
connect to only the daemon they think they're connected to,
by forcing SSL and listing the paths to the known good
certificates.

To generate long term certificates:

openssl genrsa -out /tmp/KEY 4096
openssl req -new -key /tmp/KEY -out /tmp/REQ
openssl x509 -req -days 999999 -sha256 -in /tmp/REQ -signkey /tmp/KEY -out /tmp/CERT

/tmp/KEY is the private key, and /tmp/CERT is the certificate,
both in PEM format. /tmp/REQ can be removed. Adjust the last
command to set expiration date, etc, as needed. It doesn't
make a whole lot of sense for monero anyway, since most servers
will run with one time temporary self signed certificates anyway.

SSL support is transparent, so all communication is done on the
existing ports, with SSL autodetection. This means you can start
using an SSL daemon now, but you should not enforce SSL yet or
nothing will talk to you.
This commit is contained in:
Martijn Otto 2018-06-14 23:44:48 +01:00
parent 39d7d3113b
commit 057c279cb4
No known key found for this signature in database
GPG key ID: D2E0D5D0B1D606F9
15 changed files with 200 additions and 49 deletions
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7
contrib/epee/include/hex.h
View file

@ -32,6 +32,7 @@
#include <cstdint>
#include <iosfwd>
#include <string>
#include <boost/utility/string_ref.hpp>
#include "wipeable_string.h"
#include "span.h"
@ -68,4 +69,10 @@ namespace epee
//! Write `src` bytes as hex to `out`. `out` must be twice the length
static void buffer_unchecked(char* out, const span<const std::uint8_t> src) noexcept;
};
struct from_hex
{
//! \return An std::vector of unsigned integers from the `src`
static std::vector<uint8_t> vector(boost::string_ref src);
};
}

4
contrib/epee/include/net/abstract_tcp_server2.h
View file

@ -228,8 +228,8 @@ namespace net_utils
std::map<std::string, t_connection_type> server_type_map;
void create_server_type_map();
bool init_server(uint32_t port, const std::string address = "0.0.0.0", epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = std::make_pair(std::string(), std::string()), const std::list<std::string> &allowed_certificates = {}, bool allow_any_cert = false);
bool init_server(const std::string port, const std::string& address = "0.0.0.0", epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = std::make_pair(std::string(), std::string()), const std::list<std::string> &allowed_certificates = {}, bool allow_any_cert = false);
bool init_server(uint32_t port, const std::string address = "0.0.0.0", epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = std::make_pair(std::string(), std::string()), const std::list<std::string> &allowed_certificates = {}, const std::vector<std::vector<uint8_t>> &allowed_fingerprints = {}, bool allow_any_cert = false);
bool init_server(const std::string port, const std::string& address = "0.0.0.0", epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = std::make_pair(std::string(), std::string()), const std::list<std::string> &allowed_certificates = {}, const std::vector<std::vector<uint8_t>> &allowed_fingerprints = {}, bool allow_any_cert = false);
/// Run the server's io_service loop.
bool run_server(size_t threads_count, bool wait = true, const boost::thread::attributes& attrs = boost::thread::attributes());

10
contrib/epee/include/net/abstract_tcp_server2.inl
View file

@ -900,7 +900,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
m_thread_index(0),
m_connection_type( connection_type ),
new_connection_(),
m_ssl_context({boost::asio::ssl::context(boost::asio::ssl::context::sslv23), {}})
m_ssl_context({boost::asio::ssl::context(boost::asio::ssl::context::tlsv12), {}})
{
create_server_type_map();
m_thread_name_prefix = "NET";
@ -939,14 +939,14 @@ PRAGMA_WARNING_DISABLE_VS(4355)
}
//---------------------------------------------------------------------------------
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::init_server(uint32_t port, const std::string address, epee::net_utils::ssl_support_t ssl_support, const std::pair<std::string, std::string> &private_key_and_certificate_path, const std::list<std::string> &allowed_certificates, bool allow_any_cert)
bool boosted_tcp_server<t_protocol_handler>::init_server(uint32_t port, const std::string address, epee::net_utils::ssl_support_t ssl_support, const std::pair<std::string, std::string> &private_key_and_certificate_path, const std::list<std::string> &allowed_certificates, const std::vector<std::vector<uint8_t>> &allowed_fingerprints, bool allow_any_cert)
{
TRY_ENTRY();
m_stop_signal_sent = false;
m_port = port;
m_address = address;
if (ssl_support != epee::net_utils::ssl_support_t::e_ssl_support_disabled)
m_ssl_context = create_ssl_context(private_key_and_certificate_path, allowed_certificates, allow_any_cert);
m_ssl_context = create_ssl_context(private_key_and_certificate_path, allowed_certificates, allowed_fingerprints, allow_any_cert);
// Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
boost::asio::ip::tcp::resolver resolver(io_service_);
boost::asio::ip::tcp::resolver::query query(address, boost::lexical_cast<std::string>(port), boost::asio::ip::tcp::resolver::query::canonical_name);
@ -980,7 +980,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
PUSH_WARNINGS
DISABLE_GCC_WARNING(maybe-uninitialized)
template<class t_protocol_handler>
bool boosted_tcp_server<t_protocol_handler>::init_server(const std::string port, const std::string& address, epee::net_utils::ssl_support_t ssl_support, const std::pair<std::string, std::string> &private_key_and_certificate_path, const std::list<std::string> &allowed_certificates, bool allow_any_cert)
bool boosted_tcp_server<t_protocol_handler>::init_server(const std::string port, const std::string& address, epee::net_utils::ssl_support_t ssl_support, const std::pair<std::string, std::string> &private_key_and_certificate_path, const std::list<std::string> &allowed_certificates, const std::vector<std::vector<uint8_t>> &allowed_fingerprints, bool allow_any_cert)
{
uint32_t p = 0;
@ -988,7 +988,7 @@ DISABLE_GCC_WARNING(maybe-uninitialized)
MERROR("Failed to convert port no = " << port);
return false;
}
return this->init_server(p, address, ssl_support, private_key_and_certificate_path, allowed_certificates, allow_any_cert);
return this->init_server(p, address, ssl_support, private_key_and_certificate_path, allowed_certificates, allowed_fingerprints, allow_any_cert);
}
POP_WARNINGS
//---------------------------------------------------------------------------------

10
contrib/epee/include/net/http_client.h
View file

@ -278,6 +278,7 @@ namespace net_utils
epee::net_utils::ssl_support_t m_ssl_support;
std::pair<std::string, std::string> m_ssl_private_key_and_certificate_path;
std::list<std::string> m_ssl_allowed_certificates;
std::vector<std::vector<uint8_t>> m_ssl_allowed_fingerprints;
bool m_ssl_allow_any_cert;
public:
@ -302,16 +303,16 @@ namespace net_utils
const std::string &get_host() const { return m_host_buff; };
const std::string &get_port() const { return m_port; };
bool set_server(const std::string& address, boost::optional<login> user, epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = {}, const std::list<std::string> &allowed_ssl_certificates = {}, bool allow_any_cert = false)
bool set_server(const std::string& address, boost::optional<login> user, epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = {}, const std::list<std::string> &allowed_ssl_certificates = {}, const std::vector<std::vector<uint8_t>> &allowed_ssl_fingerprints = {}, bool allow_any_cert = false)
{
http::url_content parsed{};
const bool r = parse_url(address, parsed);
CHECK_AND_ASSERT_MES(r, false, "failed to parse url: " << address);
set_server(std::move(parsed.host), std::to_string(parsed.port), std::move(user), ssl_support, private_key_and_certificate_path, allowed_ssl_certificates, allow_any_cert);
set_server(std::move(parsed.host), std::to_string(parsed.port), std::move(user), ssl_support, private_key_and_certificate_path, allowed_ssl_certificates, allowed_ssl_fingerprints, allow_any_cert);
return true;
}
void set_server(std::string host, std::string port, boost::optional<login> user, epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = {}, const std::list<std::string> &allowed_ssl_certificates = {}, bool allow_any_cert = false)
void set_server(std::string host, std::string port, boost::optional<login> user, epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = {}, const std::list<std::string> &allowed_ssl_certificates = {}, const std::vector<std::vector<uint8_t>> &allowed_ssl_fingerprints = {}, bool allow_any_cert = false)
{
CRITICAL_REGION_LOCAL(m_lock);
disconnect();
@ -321,8 +322,9 @@ namespace net_utils
m_ssl_support = ssl_support;
m_ssl_private_key_and_certificate_path = private_key_and_certificate_path;
m_ssl_allowed_certificates = allowed_ssl_certificates;
m_ssl_allowed_fingerprints = allowed_ssl_fingerprints;
m_ssl_allow_any_cert = allow_any_cert;
m_net_client.set_ssl(m_ssl_support, m_ssl_private_key_and_certificate_path, m_ssl_allowed_certificates, m_ssl_allow_any_cert);
m_net_client.set_ssl(m_ssl_support, m_ssl_private_key_and_certificate_path, m_ssl_allowed_certificates, m_ssl_allowed_fingerprints, m_ssl_allow_any_cert);
}
bool connect(std::chrono::milliseconds timeout)

6
contrib/epee/include/net/http_server_impl_base.h
View file

@ -61,7 +61,9 @@ namespace epee
boost::optional<net_utils::http::login> user = boost::none,
epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect,
const std::pair<std::string, std::string> &private_key_and_certificate_path = {},
const std::list<std::string> &allowed_certificates = std::list<std::string>(), bool allow_any_cert = false)
std::list<std::string> allowed_certificates = {},
std::vector<std::vector<uint8_t>> allowed_fingerprints = {},
bool allow_any_cert = false)
{
//set self as callback handler
@ -78,7 +80,7 @@ namespace epee
m_net_server.get_config_object().m_user = std::move(user);
MGINFO("Binding on " << bind_ip << ":" << bind_port);
bool res = m_net_server.init_server(bind_port, bind_ip, ssl_support, private_key_and_certificate_path, allowed_certificates, allow_any_cert);
bool res = m_net_server.init_server(bind_port, bind_ip, ssl_support, private_key_and_certificate_path, std::move(allowed_certificates), std::move(allowed_fingerprints), allow_any_cert);
if(!res)
{
LOG_ERROR("Failed to bind server");

8
contrib/epee/include/net/net_helper.h
View file

@ -93,7 +93,7 @@ namespace net_utils
m_deadline(m_io_service),
m_shutdowned(0),
m_ssl_support(epee::net_utils::ssl_support_t::e_ssl_support_autodetect),
m_ctx({boost::asio::ssl::context(boost::asio::ssl::context::sslv23), {}}),
m_ctx({boost::asio::ssl::context(boost::asio::ssl::context::tlsv12), {}}),
m_ssl_socket(new boost::asio::ssl::stream<boost::asio::ip::tcp::socket>(m_io_service,m_ctx.context))
{
@ -118,12 +118,12 @@ namespace net_utils
catch(...) { /* ignore */ }
}
inline void set_ssl(epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = {}, const std::list<std::string> &allowed_certificates = std::list<std::string>(), bool allow_any_cert = false)
inline void set_ssl(epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = {}, std::list<std::string> allowed_certificates = {}, std::vector<std::vector<uint8_t>> allowed_fingerprints = {}, bool allow_any_cert = false)
{
if (ssl_support == epee::net_utils::ssl_support_t::e_ssl_support_disabled)
m_ctx = {boost::asio::ssl::context(boost::asio::ssl::context::sslv23), {}};
m_ctx = {boost::asio::ssl::context(boost::asio::ssl::context::tlsv12), {}, {}};
else
m_ctx = create_ssl_context(private_key_and_certificate_path, allowed_certificates, allow_any_cert);
m_ctx = create_ssl_context(private_key_and_certificate_path, std::move(allowed_certificates), std::move(allowed_fingerprints), allow_any_cert);
m_ssl_support = ssl_support;
}

5
contrib/epee/include/net/net_ssl.h
View file

@ -50,16 +50,17 @@ namespace net_utils
{
boost::asio::ssl::context context;
std::list<std::string> allowed_certificates;
std::vector<std::vector<uint8_t>> allowed_fingerprints;
bool allow_any_cert;
};
// https://security.stackexchange.com/questions/34780/checking-client-hello-for-https-classification
constexpr size_t get_ssl_magic_size() { return 9; }
bool is_ssl(const unsigned char *data, size_t len);
ssl_context_t create_ssl_context(const std::pair<std::string, std::string> &private_key_and_certificate_path, std::list<std::string> allowed_certificates, bool allow_any_cert);
ssl_context_t create_ssl_context(const std::pair<std::string, std::string> &private_key_and_certificate_path, std::list<std::string> allowed_certificates, std::vector<std::vector<uint8_t>> allowed_fingerprints, bool allow_any_cert);
void use_ssl_certificate(ssl_context_t &ssl_context, const std::pair<std::string, std::string> &private_key_and_certificate_path);
bool create_ssl_certificate(std::string &pkey_buffer, std::string &cert_buffer);
bool is_certificate_allowed(boost::asio::ssl::verify_context &ctx, const std::list<std::string> &allowed_certificates);
bool is_certificate_allowed(boost::asio::ssl::verify_context &ctx, const ssl_context_t &ssl_context);
bool ssl_handshake(boost::asio::ssl::stream<boost::asio::ip::tcp::socket> &socket, boost::asio::ssl::stream_base::handshake_type type, const epee::net_utils::ssl_context_t &ssl_context);
bool ssl_support_from_string(ssl_support_t &ssl, boost::string_ref s);
}