786 lines
27 KiB
C++
786 lines
27 KiB
C++
// Copyright (c) 2014-2019, 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 "net/http_auth.h"
|
|
|
|
#include <array>
|
|
#include <boost/algorithm/string/find_iterator.hpp>
|
|
#include <boost/algorithm/string/predicate.hpp>
|
|
#include <boost/fusion/adapted/std_tuple.hpp>
|
|
#include <boost/fusion/algorithm/iteration/for_each.hpp>
|
|
#include <boost/fusion/algorithm/iteration/iter_fold.hpp>
|
|
#include <boost/fusion/algorithm/query/any.hpp>
|
|
#include <boost/fusion/iterator/distance.hpp>
|
|
#include <boost/fusion/iterator/value_of.hpp>
|
|
#include <boost/fusion/sequence/intrinsic/begin.hpp>
|
|
#include <boost/fusion/sequence/intrinsic/size.hpp>
|
|
#include <boost/range/algorithm/copy.hpp>
|
|
#include <boost/range/algorithm/find_if.hpp>
|
|
#include <boost/range/iterator_range_core.hpp>
|
|
#include <boost/range/join.hpp>
|
|
#include <boost/spirit/include/karma_generate.hpp>
|
|
#include <boost/spirit/include/karma_uint.hpp>
|
|
#include <boost/spirit/include/qi_alternative.hpp>
|
|
#include <boost/spirit/include/qi_and_predicate.hpp>
|
|
#include <boost/spirit/include/qi_char.hpp>
|
|
#include <boost/spirit/include/qi_char_class.hpp>
|
|
#include <boost/spirit/include/qi_difference.hpp>
|
|
#include <boost/spirit/include/qi_kleene.hpp>
|
|
#include <boost/spirit/include/qi_parse.hpp>
|
|
#include <boost/spirit/include/qi_plus.hpp>
|
|
#include <boost/spirit/include/qi_no_case.hpp>
|
|
#include <boost/spirit/include/qi_not_predicate.hpp>
|
|
#include <boost/spirit/include/qi_raw.hpp>
|
|
#include <boost/spirit/include/qi_rule.hpp>
|
|
#include <boost/spirit/include/qi_sequence.hpp>
|
|
#include <boost/spirit/include/qi_string.hpp>
|
|
#include <boost/spirit/include/qi_symbols.hpp>
|
|
#include <boost/spirit/include/qi_uint.hpp>
|
|
#include <cassert>
|
|
#include <iterator>
|
|
#include <limits>
|
|
#include <tuple>
|
|
#include <type_traits>
|
|
|
|
#include "hex.h"
|
|
#include "md5_l.h"
|
|
#include "string_coding.h"
|
|
|
|
/* This file uses the `u8` prefix and specifies all chars by ASCII numeric
|
|
value. This is for maximum portability - C++ does not actually specify ASCII
|
|
as the encoding type for unprefixed string literals, etc. Although rare, the
|
|
effort required to support rare compiler encoding types is low.
|
|
|
|
Also be careful of qi::ascii character classes (`qi::asci::alpha`, etc.) -
|
|
non-ASCII characters will cause undefined behavior in the table lookup until
|
|
boost 1.60. The expression `&qi::ascii::char_` will fail on non-ASCII
|
|
characters without "consuming" the input character. */
|
|
|
|
namespace
|
|
{
|
|
namespace http = epee::net_utils::http;
|
|
|
|
// string_ref is only constexpr if length is given
|
|
template<std::size_t N>
|
|
constexpr boost::string_ref ceref(const char (&arg)[N])
|
|
{
|
|
return boost::string_ref(arg, N - 1);
|
|
}
|
|
|
|
constexpr const auto client_auth_field = ceref(u8"Authorization");
|
|
constexpr const auto server_auth_field = ceref(u8"WWW-authenticate");
|
|
constexpr const auto auth_realm = ceref(u8"monero-rpc");
|
|
constexpr const char comma = 44;
|
|
constexpr const char equal_sign = 61;
|
|
constexpr const char quote = 34;
|
|
constexpr const char zero = 48;
|
|
constexpr const auto sess_algo = ceref(u8"-sess");
|
|
|
|
constexpr const unsigned client_reserve_size = 512; //!< std::string::reserve size for clients
|
|
|
|
//// Digest Algorithms
|
|
|
|
struct md5_
|
|
{
|
|
static constexpr const boost::string_ref name = ceref(u8"MD5");
|
|
|
|
struct update
|
|
{
|
|
template<typename T>
|
|
void operator()(const T& arg) const
|
|
{
|
|
const boost::iterator_range<const char*> data(boost::as_literal(arg));
|
|
md5::MD5Update(
|
|
std::addressof(ctx),
|
|
reinterpret_cast<const std::uint8_t*>(data.begin()),
|
|
data.size()
|
|
);
|
|
}
|
|
void operator()(const std::string& arg) const
|
|
{
|
|
(*this)(boost::string_ref(arg));
|
|
}
|
|
void operator()(const epee::wipeable_string& arg) const
|
|
{
|
|
md5::MD5Update(
|
|
std::addressof(ctx),
|
|
reinterpret_cast<const std::uint8_t*>(arg.data()),
|
|
arg.size()
|
|
);
|
|
}
|
|
|
|
md5::MD5_CTX& ctx;
|
|
};
|
|
|
|
template<typename... T>
|
|
std::array<char, 32> operator()(const T&... args) const
|
|
{
|
|
md5::MD5_CTX ctx{};
|
|
md5::MD5Init(std::addressof(ctx));
|
|
boost::fusion::for_each(std::tie(args...), update{ctx});
|
|
|
|
std::array<std::uint8_t, 16> digest{{}};
|
|
md5::MD5Final(digest.data(), std::addressof(ctx));
|
|
return epee::to_hex::array(digest);
|
|
}
|
|
};
|
|
constexpr const boost::string_ref md5_::name;
|
|
|
|
//! Digest Algorithms available for HTTP Digest Auth. Sort better algos to the left
|
|
constexpr const std::tuple<md5_> digest_algorithms{};
|
|
|
|
//// Various String Utilities
|
|
|
|
struct ascii_tolower_
|
|
{
|
|
template<typename Char>
|
|
constexpr Char operator()(Char value) const noexcept
|
|
{
|
|
static_assert(std::is_integral<Char>::value, "only integral types supported");
|
|
return (65 <= value && value <= 90) ? (value + 32) : value;
|
|
}
|
|
};
|
|
constexpr const ascii_tolower_ ascii_tolower{};
|
|
|
|
struct ascii_iequal_
|
|
{
|
|
template<typename Char>
|
|
constexpr bool operator()(Char left, Char right) const noexcept
|
|
{
|
|
return ascii_tolower(left) == ascii_tolower(right);
|
|
}
|
|
};
|
|
constexpr const ascii_iequal_ ascii_iequal{};
|
|
|
|
struct http_list_separator_
|
|
{
|
|
template<typename Char>
|
|
bool operator()(Char value) const noexcept
|
|
{
|
|
static_assert(std::is_integral<Char>::value, "only integral types supported");
|
|
return boost::spirit::char_encoding::ascii::isascii_(value) &&
|
|
(value == comma || boost::spirit::char_encoding::ascii::isspace(value));
|
|
}
|
|
};
|
|
constexpr const http_list_separator_ http_list_separator{};
|
|
|
|
std::string to_string(boost::iterator_range<const char*> source)
|
|
{
|
|
return {source.begin(), source.size()};
|
|
}
|
|
|
|
template<typename T>
|
|
void add_first_field(std::string& str, const char* const name, const T& value)
|
|
{
|
|
str.append(name);
|
|
str.push_back(equal_sign);
|
|
boost::copy(value, std::back_inserter(str));
|
|
}
|
|
|
|
template<typename T>
|
|
void add_field(std::string& str, const char* const name, const T& value)
|
|
{
|
|
str.push_back(comma);
|
|
add_first_field(str, name, value);
|
|
}
|
|
|
|
template<typename T>
|
|
using quoted_result = boost::joined_range<
|
|
const boost::joined_range<const boost::string_ref, const T>, const boost::string_ref
|
|
>;
|
|
|
|
template<typename T>
|
|
quoted_result<T> quoted(const T& arg)
|
|
{
|
|
return boost::range::join(boost::range::join(ceref(u8"\""), arg), ceref(u8"\""));
|
|
}
|
|
|
|
//// Digest Authentication
|
|
|
|
template<typename Digest>
|
|
typename std::result_of<Digest()>::type generate_a1(
|
|
Digest digest, const http::login& creds, const boost::string_ref realm)
|
|
{
|
|
return digest(creds.username, u8":", realm, u8":", creds.password);
|
|
}
|
|
|
|
template<typename Digest>
|
|
typename std::result_of<Digest()>::type generate_a1(
|
|
Digest digest, const http::http_client_auth::session& user)
|
|
{
|
|
return generate_a1(std::move(digest), user.credentials, user.server.realm);
|
|
}
|
|
|
|
template<typename T>
|
|
void init_client_value(std::string& str,
|
|
const boost::string_ref algorithm, const http::http_client_auth::session& user,
|
|
const boost::string_ref uri, const T& response)
|
|
{
|
|
str.append(u8"Digest ");
|
|
add_first_field(str, u8"algorithm", algorithm);
|
|
add_field(str, u8"nonce", quoted(user.server.nonce));
|
|
add_field(str, u8"realm", quoted(user.server.realm));
|
|
add_field(str, u8"response", quoted(response));
|
|
add_field(str, u8"uri", quoted(uri));
|
|
add_field(str, u8"username", quoted(user.credentials.username));
|
|
if (!user.server.opaque.empty())
|
|
add_field(str, u8"opaque", quoted(user.server.opaque));
|
|
}
|
|
|
|
//! Implements superseded algorithm specified in RFC 2069
|
|
template<typename Digest>
|
|
struct old_algorithm
|
|
{
|
|
explicit old_algorithm(Digest digest_) : digest(std::move(digest_)) {}
|
|
|
|
std::string operator()(const http::http_client_auth::session& user,
|
|
const boost::string_ref method, const boost::string_ref uri) const
|
|
{
|
|
const auto response = digest(
|
|
generate_a1(digest, user), u8":", user.server.nonce, u8":", digest(method, u8":", uri)
|
|
);
|
|
std::string out{};
|
|
out.reserve(client_reserve_size);
|
|
init_client_value(out, Digest::name, user, uri, response);
|
|
return out;
|
|
}
|
|
private:
|
|
Digest digest;
|
|
};
|
|
|
|
//! Implements the `qop=auth` algorithm specified in RFC 2617
|
|
template<typename Digest>
|
|
struct auth_algorithm
|
|
{
|
|
explicit auth_algorithm(Digest digest_) : digest(std::move(digest_)) {}
|
|
|
|
std::string operator()(const http::http_client_auth::session& user,
|
|
const boost::string_ref method, const boost::string_ref uri) const
|
|
{
|
|
namespace karma = boost::spirit::karma;
|
|
using counter_type = decltype(user.counter);
|
|
static_assert(
|
|
std::numeric_limits<counter_type>::radix == 2, "unexpected radix for counter"
|
|
);
|
|
static_assert(
|
|
std::numeric_limits<counter_type>::digits <= 32,
|
|
"number of digits will cause underflow on padding below"
|
|
);
|
|
|
|
std::string out{};
|
|
out.reserve(client_reserve_size);
|
|
|
|
karma::generate(std::back_inserter(out), karma::hex(user.counter));
|
|
out.insert(out.begin(), 8 - out.size(), zero); // zero left pad
|
|
if (out.size() != 8)
|
|
return {};
|
|
|
|
std::array<char, 8> nc{{}};
|
|
boost::copy(out, nc.data());
|
|
const auto response = digest(
|
|
generate_a1(digest, user), u8":", user.server.nonce, u8":", nc, u8"::auth:", digest(method, u8":", uri)
|
|
);
|
|
out.clear();
|
|
init_client_value(out, Digest::name, user, uri, response);
|
|
add_field(out, u8"qop", ceref(u8"auth"));
|
|
add_field(out, u8"nc", nc);
|
|
return out;
|
|
}
|
|
|
|
private:
|
|
Digest digest;
|
|
};
|
|
|
|
//! Processes client "Authorization" and server "WWW-authenticate" HTTP fields
|
|
struct auth_message
|
|
{
|
|
using iterator = const char*;
|
|
enum status{ kFail = 0, kStale, kPass };
|
|
|
|
//! \return Status of the `response` field from the client
|
|
static status verify(const boost::string_ref method, const boost::string_ref request,
|
|
const http::http_server_auth::session& user)
|
|
{
|
|
const auto parsed = parse(request);
|
|
if (parsed &&
|
|
boost::equals(parsed->username, user.credentials.username) &&
|
|
boost::fusion::any(digest_algorithms, has_valid_response{*parsed, user, method}))
|
|
{
|
|
if (boost::equals(parsed->nonce, user.nonce))
|
|
{
|
|
// RFC 2069 format does not verify nc value - allow just once
|
|
if (user.counter == 1 || (!parsed->qop.empty() && parsed->counter() == user.counter))
|
|
{
|
|
return kPass;
|
|
}
|
|
}
|
|
return kStale;
|
|
}
|
|
return kFail;
|
|
}
|
|
|
|
//! \return Information needed to generate client authentication `response`s.
|
|
static http::http_client_auth::session::keys extract(
|
|
const http::http_response_info& response, const bool is_first)
|
|
{
|
|
using field = std::pair<std::string, std::string>;
|
|
|
|
server_parameters best{};
|
|
|
|
const std::list<field>& fields = response.m_header_info.m_etc_fields;
|
|
auto current = fields.begin();
|
|
const auto end = fields.end();
|
|
while (true)
|
|
{
|
|
current = std::find_if(current, end, [] (const field& value) {
|
|
return boost::equals(server_auth_field, value.first, ascii_iequal);
|
|
});
|
|
if (current == end)
|
|
break;
|
|
|
|
const auto parsed = parse(current->second);
|
|
if (parsed)
|
|
{
|
|
server_parameters local_best = parsed->algorithm.empty() ?
|
|
server_parameters{*parsed, boost::fusion::find<md5_>(digest_algorithms)} :
|
|
boost::fusion::iter_fold(digest_algorithms, server_parameters{}, matches_algorithm{*parsed});
|
|
|
|
if (local_best.index < best.index)
|
|
best = std::move(local_best);
|
|
}
|
|
++current;
|
|
}
|
|
if (is_first || boost::equals(best.stale, ceref(u8"true"), ascii_iequal))
|
|
return best.take();
|
|
return {}; // authentication failed with bad user/pass
|
|
}
|
|
|
|
private:
|
|
explicit auth_message()
|
|
: algorithm()
|
|
, cnonce()
|
|
, nc()
|
|
, nonce()
|
|
, qop()
|
|
, realm()
|
|
, response()
|
|
, stale()
|
|
, uri()
|
|
, username() {
|
|
}
|
|
|
|
static boost::optional<auth_message> parse(const boost::string_ref request)
|
|
{
|
|
struct parser
|
|
{
|
|
using field_parser = std::function<bool(const parser&, iterator&, iterator, auth_message&)>;
|
|
|
|
explicit parser() : field_table(), skip_whitespace(), header(), quoted_string(), token(), fields() {
|
|
using namespace std::placeholders;
|
|
namespace qi = boost::spirit::qi;
|
|
|
|
struct parse_nc
|
|
{
|
|
bool operator()(const parser&, iterator& current, const iterator end, auth_message& result) const
|
|
{
|
|
return qi::parse(
|
|
current, end,
|
|
(qi::raw[qi::uint_parser<std::uint32_t, 16, 8, 8>{}]),
|
|
result.nc
|
|
);
|
|
}
|
|
};
|
|
struct parse_token
|
|
{
|
|
bool operator()(const parser& parse, iterator& current, const iterator end,
|
|
boost::iterator_range<iterator>& result) const
|
|
{
|
|
return qi::parse(current, end, parse.token, result);
|
|
}
|
|
};
|
|
struct parse_string
|
|
{
|
|
bool operator()(const parser& parse, iterator& current, const iterator end,
|
|
boost::iterator_range<iterator>& result) const
|
|
{
|
|
return qi::parse(current, end, parse.quoted_string, result);
|
|
}
|
|
bool operator()(const parser& parse, iterator& current, const iterator end) const
|
|
{
|
|
return qi::parse(current, end, parse.quoted_string);
|
|
}
|
|
};
|
|
struct parse_response
|
|
{
|
|
bool operator()(const parser&, iterator& current, const iterator end, auth_message& result) const
|
|
{
|
|
using byte = qi::uint_parser<std::uint8_t, 16, 2, 2>;
|
|
return qi::parse(
|
|
current, end,
|
|
(qi::lit(quote) >> qi::raw[+(byte{})] >> qi::lit(quote)),
|
|
result.response
|
|
);
|
|
}
|
|
};
|
|
|
|
field_table.add
|
|
(u8"algorithm", std::bind(parse_token{}, _1, _2, _3, std::bind(&auth_message::algorithm, _4)))
|
|
(u8"cnonce", std::bind(parse_string{}, _1, _2, _3, std::bind(&auth_message::cnonce, _4)))
|
|
(u8"domain", std::bind(parse_string{}, _1, _2, _3)) // ignore field
|
|
(u8"nc", parse_nc{})
|
|
(u8"nonce", std::bind(parse_string{}, _1, _2, _3, std::bind(&auth_message::nonce, _4)))
|
|
(u8"opaque", std::bind(parse_string{}, _1, _2, _3, std::bind(&auth_message::opaque, _4)))
|
|
(u8"qop", std::bind(parse_token{}, _1, _2, _3, std::bind(&auth_message::qop, _4)))
|
|
(u8"realm", std::bind(parse_string{}, _1, _2, _3, std::bind(&auth_message::realm, _4)))
|
|
(u8"response", parse_response{})
|
|
(u8"stale", std::bind(parse_token{}, _1, _2, _3, std::bind(&auth_message::stale, _4)))
|
|
(u8"uri", std::bind(parse_string{}, _1, _2, _3, std::bind(&auth_message::uri, _4)))
|
|
(u8"username", std::bind(parse_string{}, _1, _2, _3, std::bind(&auth_message::username, _4)));
|
|
|
|
skip_whitespace = *(&qi::ascii::char_ >> qi::ascii::space);
|
|
header = skip_whitespace >> qi::ascii::no_case[u8"digest"] >> skip_whitespace;
|
|
quoted_string = (qi::lit(quote) >> qi::raw[+(u8"\\\"" | (qi::ascii::char_ - quote))] >> qi::lit(quote));
|
|
token =
|
|
(!qi::lit(quote) >> qi::raw[+(&qi::ascii::char_ >> (qi::ascii::graph - qi::ascii::char_(u8"()<>@,;:\\\"/[]?={}")))]) |
|
|
quoted_string;
|
|
fields = field_table >> skip_whitespace >> equal_sign >> skip_whitespace;
|
|
}
|
|
|
|
boost::optional<auth_message> operator()(const boost::string_ref request) const
|
|
{
|
|
namespace qi = boost::spirit::qi;
|
|
|
|
iterator current = request.begin();
|
|
const iterator end = request.end();
|
|
|
|
if (!qi::parse(current, end, header))
|
|
{
|
|
return boost::none;
|
|
}
|
|
|
|
auth_message info{};
|
|
field_parser null_parser{};
|
|
std::reference_wrapper<const field_parser> field = null_parser;
|
|
|
|
do // require at least one field; require field after `,` character
|
|
{
|
|
if (!qi::parse(current, end, fields, field) || !field(*this, current, end, info))
|
|
{
|
|
return boost::none;
|
|
}
|
|
qi::parse(current, end, skip_whitespace);
|
|
} while (qi::parse(current, end, qi::char_(comma) >> skip_whitespace));
|
|
return boost::make_optional(current == end, info);
|
|
}
|
|
|
|
private:
|
|
boost::spirit::qi::symbols<
|
|
char, field_parser, boost::spirit::qi::tst<char, field_parser>, ascii_tolower_
|
|
> field_table;
|
|
boost::spirit::qi::rule<iterator> skip_whitespace;
|
|
boost::spirit::qi::rule<iterator> header;
|
|
boost::spirit::qi::rule<iterator, boost::iterator_range<iterator>()> quoted_string;
|
|
boost::spirit::qi::rule<iterator, boost::iterator_range<iterator>()> token;
|
|
boost::spirit::qi::rule<iterator, std::reference_wrapper<const field_parser>()> fields;
|
|
}; // parser
|
|
|
|
static const parser parse_;
|
|
return parse_(request);
|
|
}
|
|
|
|
struct has_valid_response
|
|
{
|
|
template<typename Digest, typename Result>
|
|
Result generate_old_response(Digest digest, const Result& key, const Result& auth) const
|
|
{
|
|
return digest(key, u8":", request.nonce, u8":", auth);
|
|
}
|
|
|
|
template<typename Digest, typename Result>
|
|
Result generate_new_response(Digest digest, const Result& key, const Result& auth) const
|
|
{
|
|
return digest(
|
|
key, u8":", request.nonce, u8":", request.nc, u8":", request.cnonce, u8":", request.qop, u8":", auth
|
|
);
|
|
}
|
|
|
|
template<typename Result>
|
|
bool check(const Result& result) const
|
|
{
|
|
return boost::equals(request.response, result, ascii_iequal);
|
|
}
|
|
|
|
template<typename Digest>
|
|
bool operator()(const Digest& digest) const
|
|
{
|
|
if (boost::starts_with(request.algorithm, Digest::name, ascii_iequal) ||
|
|
(request.algorithm.empty() && std::is_same<md5_, Digest>::value))
|
|
{
|
|
auto key = generate_a1(digest, user.credentials, auth_realm);
|
|
if (boost::ends_with(request.algorithm, sess_algo, ascii_iequal))
|
|
{
|
|
key = digest(key, u8":", request.nonce, u8":", request.cnonce);
|
|
}
|
|
|
|
auto auth = digest(method, u8":", request.uri);
|
|
if (request.qop.empty())
|
|
{
|
|
return check(generate_old_response(std::move(digest), std::move(key), std::move(auth)));
|
|
}
|
|
else if (boost::equals(ceref(u8"auth"), request.qop, ascii_iequal))
|
|
{
|
|
return check(generate_new_response(std::move(digest), std::move(key), std::move(auth)));
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
const auth_message& request;
|
|
const http::http_server_auth::session& user;
|
|
const boost::string_ref method;
|
|
};
|
|
|
|
boost::optional<std::uint32_t> counter() const
|
|
{
|
|
namespace qi = boost::spirit::qi;
|
|
using hex = qi::uint_parser<std::uint32_t, 16>;
|
|
std::uint32_t value = 0;
|
|
const bool converted = qi::parse(nc.begin(), nc.end(), hex{}, value);
|
|
return boost::make_optional(converted, value);
|
|
}
|
|
|
|
struct server_parameters
|
|
{
|
|
server_parameters()
|
|
: nonce(), opaque(), realm(), stale(), value_generator()
|
|
, index(boost::fusion::size(digest_algorithms))
|
|
{}
|
|
|
|
template<typename DigestIter>
|
|
explicit server_parameters(const auth_message& request, const DigestIter& digest)
|
|
: nonce(request.nonce)
|
|
, opaque(request.opaque)
|
|
, stale(request.stale)
|
|
, realm(request.realm)
|
|
, value_generator()
|
|
, index(boost::fusion::distance(boost::fusion::begin(digest_algorithms), digest))
|
|
{
|
|
using digest_type = typename boost::fusion::result_of::value_of<DigestIter>::type;
|
|
|
|
// debug check internal state of the auth_message class
|
|
assert(
|
|
(std::is_same<digest_type, md5_>::value) ||
|
|
boost::equals((*digest).name, request.algorithm, ascii_iequal)
|
|
);
|
|
if (request.qop.empty())
|
|
value_generator = old_algorithm<digest_type>{*digest};
|
|
else
|
|
{
|
|
for (auto elem = boost::make_split_iterator(request.qop, boost::token_finder(http_list_separator));
|
|
!elem.eof();
|
|
++elem)
|
|
{
|
|
if (boost::equals(ceref(u8"auth"), *elem, ascii_iequal))
|
|
{
|
|
value_generator = auth_algorithm<digest_type>{*digest};
|
|
break;
|
|
}
|
|
}
|
|
if (!value_generator) // no supported qop mode
|
|
index = boost::fusion::size(digest_algorithms);
|
|
}
|
|
}
|
|
|
|
http::http_client_auth::session::keys take()
|
|
{
|
|
return {to_string(nonce), to_string(opaque), to_string(realm), std::move(value_generator)};
|
|
}
|
|
|
|
boost::iterator_range<iterator> nonce;
|
|
boost::iterator_range<iterator> opaque;
|
|
boost::iterator_range<iterator> realm;
|
|
boost::iterator_range<iterator> stale;
|
|
http::http_client_auth::session::keys::algorithm value_generator;
|
|
unsigned index;
|
|
};
|
|
|
|
struct matches_algorithm
|
|
{
|
|
template<typename DigestIter>
|
|
server_parameters operator()(server_parameters current, const DigestIter& digest) const
|
|
{
|
|
if (!current.value_generator)
|
|
{
|
|
if (boost::equals(response.algorithm, (*digest).name, ascii_iequal))
|
|
{
|
|
current = server_parameters{response, digest};
|
|
}
|
|
}
|
|
return current;
|
|
}
|
|
const auth_message& response;
|
|
};
|
|
|
|
|
|
boost::iterator_range<iterator> algorithm;
|
|
boost::iterator_range<iterator> cnonce;
|
|
boost::iterator_range<iterator> nc;
|
|
boost::iterator_range<iterator> nonce;
|
|
boost::iterator_range<iterator> opaque;
|
|
boost::iterator_range<iterator> qop;
|
|
boost::iterator_range<iterator> realm;
|
|
boost::iterator_range<iterator> response;
|
|
boost::iterator_range<iterator> stale;
|
|
boost::iterator_range<iterator> uri;
|
|
boost::iterator_range<iterator> username;
|
|
}; // auth_message
|
|
|
|
struct add_challenge
|
|
{
|
|
template<typename Digest>
|
|
void operator()(const Digest& digest) const
|
|
{
|
|
static constexpr const auto fvalue = ceref(u8"Digest qop=\"auth\"");
|
|
|
|
for (unsigned i = 0; i < 2; ++i)
|
|
{
|
|
std::string out(fvalue);
|
|
|
|
const auto algorithm = boost::range::join(
|
|
Digest::name, (i == 0 ? boost::string_ref{} : sess_algo)
|
|
);
|
|
add_field(out, u8"algorithm", algorithm);
|
|
add_field(out, u8"realm", quoted(auth_realm));
|
|
add_field(out, u8"nonce", quoted(nonce));
|
|
add_field(out, u8"stale", is_stale ? ceref("true") : ceref("false"));
|
|
|
|
fields.push_back(std::make_pair(std::string(server_auth_field), std::move(out)));
|
|
}
|
|
}
|
|
|
|
const boost::string_ref nonce;
|
|
std::list<std::pair<std::string, std::string>>& fields;
|
|
const bool is_stale;
|
|
};
|
|
|
|
http::http_response_info create_digest_response(const boost::string_ref nonce, const bool is_stale)
|
|
{
|
|
epee::net_utils::http::http_response_info rc{};
|
|
rc.m_response_code = 401;
|
|
rc.m_response_comment = u8"Unauthorized";
|
|
rc.m_mime_tipe = u8"text/html";
|
|
rc.m_body =
|
|
u8"<html><head><title>Unauthorized Access</title></head><body><h1>401 Unauthorized</h1></body></html>";
|
|
|
|
boost::fusion::for_each(
|
|
digest_algorithms, add_challenge{nonce, rc.m_additional_fields, is_stale}
|
|
);
|
|
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
namespace epee
|
|
{
|
|
namespace net_utils
|
|
{
|
|
namespace http
|
|
{
|
|
http_server_auth::http_server_auth(login credentials, std::function<void(size_t, uint8_t*)> r)
|
|
: user(session{std::move(credentials)}), rng(std::move(r)) {
|
|
}
|
|
|
|
boost::optional<http_response_info> http_server_auth::do_get_response(const http_request_info& request)
|
|
{
|
|
assert(user);
|
|
using field = std::pair<std::string, std::string>;
|
|
|
|
const std::list<field>& fields = request.m_header_info.m_etc_fields;
|
|
const auto auth = boost::find_if(fields, [] (const field& value) {
|
|
return boost::equals(client_auth_field, value.first, ascii_iequal);
|
|
});
|
|
|
|
bool is_stale = false;
|
|
if (auth != fields.end())
|
|
{
|
|
++(user->counter);
|
|
switch (auth_message::verify(request.m_http_method_str, auth->second, *user))
|
|
{
|
|
case auth_message::kPass:
|
|
return boost::none;
|
|
|
|
case auth_message::kStale:
|
|
is_stale = true;
|
|
break;
|
|
|
|
default:
|
|
case auth_message::kFail:
|
|
break;
|
|
}
|
|
}
|
|
user->counter = 0;
|
|
{
|
|
std::array<std::uint8_t, 16> rand_128bit{{}};
|
|
rng(rand_128bit.size(), rand_128bit.data());
|
|
user->nonce = string_encoding::base64_encode(rand_128bit.data(), rand_128bit.size());
|
|
}
|
|
return create_digest_response(user->nonce, is_stale);
|
|
}
|
|
|
|
http_client_auth::http_client_auth(login credentials)
|
|
: user(session{std::move(credentials)}) {
|
|
}
|
|
|
|
http_client_auth::status http_client_auth::do_handle_401(const http_response_info& response)
|
|
{
|
|
assert(user);
|
|
const bool first_auth = (user->counter == 0);
|
|
user->server = auth_message::extract(response, first_auth);
|
|
if (user->server.generator)
|
|
{
|
|
user->counter = 0;
|
|
return kSuccess;
|
|
}
|
|
return first_auth ? kParseFailure : kBadPassword;
|
|
}
|
|
|
|
boost::optional<std::pair<std::string, std::string>> http_client_auth::do_get_auth_field(
|
|
const boost::string_ref method, const boost::string_ref uri)
|
|
{
|
|
assert(user);
|
|
if (user->server.generator)
|
|
{
|
|
++(user->counter);
|
|
return std::make_pair(std::string(client_auth_field), user->server.generator(*user, method, uri));
|
|
}
|
|
return boost::none;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|