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// Copyright (c) 2014-2020, 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.
#pragma once
#include <boost/optional/optional.hpp>
#include <boost/utility/string_ref.hpp>
#include <cstdint>
#include <functional>
#include <string>
#include <utility>
#include "wipeable_string.h"
#include "http_base.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net.http"
namespace epee
{
namespace net_utils
{
namespace http
{
struct login
{
login() : username(), password() {}
login(std::string username_, wipeable_string password_)
: username(std::move(username_)), password(std::move(password_))
{}
std::string username;
wipeable_string password;
};
//! Implements RFC 2617 digest auth. Digests from RFC 7616 can be added.
class http_server_auth
{
public:
struct session
{
session(login credentials_)
: credentials(std::move(credentials_)), nonce(), counter(0)
{}
login credentials;
std::string nonce;
std::uint32_t counter;
};
http_server_auth() : user(), rng() {}
http_server_auth(login credentials, std::function<void(size_t, uint8_t*)> r);
//! \return Auth response, or `boost::none` iff `request` had valid auth.
boost::optional<http_response_info> get_response(const http_request_info& request)
{
if (user)
return do_get_response(request);
return boost::none;
}
private:
boost::optional<http_response_info> do_get_response(const http_request_info& request);
boost::optional<session> user;
std::function<void(size_t, uint8_t*)> rng;
};
//! Implements RFC 2617 digest auth. Digests from RFC 7616 can be added.
class http_client_auth
{
public:
enum status : std::uint8_t { kSuccess = 0, kBadPassword, kParseFailure };
struct session
{
session(login credentials_)
: credentials(std::move(credentials_)), server(), counter(0)
{}
struct keys
{
using algorithm =
std::function<std::string(const session&, boost::string_ref, boost::string_ref)>;
keys() : nonce(), opaque(), realm(), generator() {}
keys(std::string nonce_, std::string opaque_, std::string realm_, algorithm generator_)
: nonce(std::move(nonce_))
, opaque(std::move(opaque_))
, realm(std::move(realm_))
, generator(std::move(generator_))
{}
std::string nonce;
std::string opaque;
std::string realm;
algorithm generator;
};
login credentials;
keys server;
std::uint32_t counter;
};
http_client_auth() : user() {}
http_client_auth(login credentials);
/*!
Clients receiving a 401 response code from the server should call this
function to process the server auth. Then, before every client request,
`get_auth_field()` should be called to retrieve the newest
authorization request.
\return `kBadPassword` if client will never be able to authenticate,
`kParseFailure` if all server authentication responses were invalid,
and `kSuccess` if `get_auth_field` is ready to generate authorization
fields.
*/
status handle_401(const http_response_info& response)
{
if (user)
return do_handle_401(response);
return kBadPassword;
}
/*!
After calling `handle_401`, clients should call this function to
generate an authentication field for every request.
\return A HTTP "Authorization" field if `handle_401(...)` previously
returned `kSuccess`.
*/
boost::optional<std::pair<std::string, std::string>> get_auth_field(
const boost::string_ref method, const boost::string_ref uri)
{
if (user)
return do_get_auth_field(method, uri);
return boost::none;
}
private:
status do_handle_401(const http_response_info&);
boost::optional<std::pair<std::string, std::string>> do_get_auth_field(boost::string_ref, boost::string_ref);
boost::optional<session> user;
};
}
}
}
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