monero/contrib/epee/include/net/http_auth.h

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// Copyright (c) 2014-2017, 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"
Change logging to easylogging++ This replaces the epee and data_loggers logging systems with a single one, and also adds filename:line and explicit severity levels. Categories may be defined, and logging severity set by category (or set of categories). epee style 0-4 log level maps to a sensible severity configuration. Log files now also rotate when reaching 100 MB. To select which logs to output, use the MONERO_LOGS environment variable, with a comma separated list of categories (globs are supported), with their requested severity level after a colon. If a log matches more than one such setting, the last one in the configuration string applies. A few examples: This one is (mostly) silent, only outputting fatal errors: MONERO_LOGS=*:FATAL This one is very verbose: MONERO_LOGS=*:TRACE This one is totally silent (logwise): MONERO_LOGS="" This one outputs all errors and warnings, except for the "verify" category, which prints just fatal errors (the verify category is used for logs about incoming transactions and blocks, and it is expected that some/many will fail to verify, hence we don't want the spam): MONERO_LOGS=*:WARNING,verify:FATAL Log levels are, in decreasing order of priority: FATAL, ERROR, WARNING, INFO, DEBUG, TRACE Subcategories may be added using prefixes and globs. This example will output net.p2p logs at the TRACE level, but all other net* logs only at INFO: MONERO_LOGS=*:ERROR,net*:INFO,net.p2p:TRACE Logs which are intended for the user (which Monero was using a lot through epee, but really isn't a nice way to go things) should use the "global" category. There are a few helper macros for using this category, eg: MGINFO("this shows up by default") or MGINFO_RED("this is red"), to try to keep a similar look and feel for now. Existing epee log macros still exist, and map to the new log levels, but since they're used as a "user facing" UI element as much as a logging system, they often don't map well to log severities (ie, a log level 0 log may be an error, or may be something we want the user to see, such as an important info). In those cases, I tried to use the new macros. In other cases, I left the existing macros in. When modifying logs, it is probably best to switch to the new macros with explicit levels. The --log-level options and set_log commands now also accept category settings, in addition to the epee style log levels.
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#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_))
{}
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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
{
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session(login credentials_)
: credentials(std::move(credentials_)), nonce(), counter(0)
{}
login credentials;
std::string nonce;
std::uint32_t counter;
};
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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;
}
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private:
boost::optional<http_response_info> do_get_response(const http_request_info& request);
boost::optional<session> user;
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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;
};
}
}
}