mirror of
https://github.com/matrix-construct/construct
synced 2024-09-03 23:35:19 +02:00
347 lines
7.3 KiB
C++
347 lines
7.3 KiB
C++
// Matrix Construct
|
|
//
|
|
// Copyright (C) Matrix Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
ircd::m::request::request(const string_view &method,
|
|
const string_view &uri,
|
|
const mutable_buffer &body_buf,
|
|
const json::members &body)
|
|
:request
|
|
{
|
|
my_host(),
|
|
string_view{},
|
|
method,
|
|
uri,
|
|
json::stringify(mutable_buffer{body_buf}, body)
|
|
}
|
|
{}
|
|
|
|
ircd::m::request::request(const string_view &method,
|
|
const string_view &uri)
|
|
:request
|
|
{
|
|
my_host(),
|
|
string_view{},
|
|
method,
|
|
uri,
|
|
json::object{}
|
|
}
|
|
{}
|
|
|
|
ircd::m::request::request(const string_view &method,
|
|
const string_view &uri,
|
|
const json::object &content)
|
|
:request
|
|
{
|
|
my_host(),
|
|
string_view{},
|
|
method,
|
|
uri,
|
|
content
|
|
}
|
|
{}
|
|
|
|
ircd::m::request::request(const string_view &origin,
|
|
const string_view &destination,
|
|
const string_view &method,
|
|
const string_view &uri,
|
|
const json::object &content)
|
|
{
|
|
json::get<"origin"_>(*this) = origin;
|
|
json::get<"destination"_>(*this) = destination;
|
|
json::get<"method"_>(*this) = method;
|
|
json::get<"uri"_>(*this) = uri;
|
|
json::get<"content"_>(*this) = content;
|
|
|
|
if(unlikely(origin && !rfc3986::valid_remote(std::nothrow, origin)))
|
|
throw m::error
|
|
{
|
|
http::BAD_REQUEST, "M_REQUEST_INVALID_ORIGIN",
|
|
"This origin string '%s' is not a valid remote.",
|
|
origin
|
|
};
|
|
|
|
if(unlikely(destination && !rfc3986::valid_remote(std::nothrow, destination)))
|
|
throw m::error
|
|
{
|
|
http::BAD_REQUEST, "M_REQUEST_INVALID_DESTINATION",
|
|
"This destination string '%s' is not a valid remote.",
|
|
destination
|
|
};
|
|
}
|
|
|
|
decltype(ircd::m::request::headers_max)
|
|
ircd::m::request::headers_max
|
|
{
|
|
32UL
|
|
};
|
|
|
|
ircd::string_view
|
|
ircd::m::request::operator()(const mutable_buffer &out,
|
|
const vector_view<const http::header> &addl_headers)
|
|
const
|
|
{
|
|
thread_local http::header header[headers_max];
|
|
const ctx::critical_assertion ca;
|
|
size_t headers{0};
|
|
|
|
header[headers++] =
|
|
{
|
|
"User-Agent", info::user_agent
|
|
};
|
|
|
|
thread_local char x_matrix[2_KiB];
|
|
if(startswith(json::at<"uri"_>(*this), "/_matrix/federation"))
|
|
{
|
|
const json::string &origin
|
|
{
|
|
json::at<"origin"_>(*this)
|
|
};
|
|
|
|
const auto &my
|
|
{
|
|
m::my(origin)
|
|
};
|
|
|
|
const auto &secret_key
|
|
{
|
|
m::secret_key(my)
|
|
};
|
|
|
|
const auto &public_key_id
|
|
{
|
|
m::public_key_id(my)
|
|
};
|
|
|
|
header[headers++] =
|
|
{
|
|
"Authorization", generate(x_matrix, secret_key, public_key_id)
|
|
};
|
|
}
|
|
|
|
assert(headers <= headers_max);
|
|
assert(headers + addl_headers.size() <= headers_max);
|
|
for(size_t i(0); i < addl_headers.size() && headers < headers_max; ++i)
|
|
header[headers++] = addl_headers.at(i);
|
|
|
|
static const string_view content_type
|
|
{
|
|
"application/json; charset=utf-8"_sv
|
|
};
|
|
|
|
const auto content_length
|
|
{
|
|
string_view(json::get<"content"_>(*this)).size()
|
|
};
|
|
|
|
window_buffer sb{out};
|
|
http::request
|
|
{
|
|
sb,
|
|
json::at<"destination"_>(*this),
|
|
json::at<"method"_>(*this),
|
|
json::at<"uri"_>(*this),
|
|
content_length,
|
|
content_type,
|
|
{ header, headers }
|
|
};
|
|
|
|
return sb.completed();
|
|
}
|
|
|
|
decltype(ircd::m::request::generate_content_max)
|
|
ircd::m::request::generate_content_max
|
|
{
|
|
{ "name", "ircd.m.request.generate.content_max" },
|
|
{ "default", long(1_MiB) },
|
|
};
|
|
|
|
ircd::string_view
|
|
ircd::m::request::generate(const mutable_buffer &out,
|
|
const ed25519::sk &sk,
|
|
const string_view &pkid)
|
|
const
|
|
{
|
|
const ctx::critical_assertion ca;
|
|
thread_local unique_buffer<mutable_buffer> buf
|
|
{
|
|
size_t(generate_content_max)
|
|
};
|
|
|
|
if(unlikely(json::serialized(*this) > buffer::size(buf)))
|
|
throw m::error
|
|
{
|
|
"M_REQUEST_TOO_LARGE", "This server generated a request of %zu bytes; limit is %zu",
|
|
json::serialized(*this),
|
|
buffer::size(buf)
|
|
};
|
|
|
|
const json::object object
|
|
{
|
|
stringify(mutable_buffer{buf}, *this)
|
|
};
|
|
|
|
const json::string &origin
|
|
{
|
|
json::at<"origin"_>(*this)
|
|
};
|
|
|
|
const auto &secret_key
|
|
{
|
|
m::secret_key(my(origin))
|
|
};
|
|
|
|
const ed25519::sig sig
|
|
{
|
|
secret_key.sign(object)
|
|
};
|
|
|
|
thread_local char sigb64[1_KiB];
|
|
return fmt::sprintf
|
|
{
|
|
out, "X-Matrix origin=%s,key=\"%s\",sig=\"%s\"",
|
|
origin,
|
|
pkid,
|
|
b64encode_unpadded(sigb64, sig)
|
|
};
|
|
}
|
|
|
|
bool
|
|
ircd::m::request::verify(const string_view &key,
|
|
const string_view &sig_)
|
|
const
|
|
{
|
|
const ed25519::sig sig
|
|
{
|
|
[&sig_](auto &buf)
|
|
{
|
|
b64decode(buf, sig_);
|
|
}
|
|
};
|
|
|
|
const json::string &origin
|
|
{
|
|
json::at<"origin"_>(*this)
|
|
};
|
|
|
|
const m::node node
|
|
{
|
|
origin
|
|
};
|
|
|
|
bool verified{false};
|
|
node.key(key, [this, &verified, &sig]
|
|
(const ed25519::pk &pk)
|
|
{
|
|
verified = verify(pk, sig);
|
|
});
|
|
|
|
return verified;
|
|
}
|
|
|
|
decltype(ircd::m::request::verify_content_max)
|
|
ircd::m::request::verify_content_max
|
|
{
|
|
{ "name", "ircd.m.request.verify.content_max" },
|
|
{ "default", long(1_MiB) },
|
|
};
|
|
|
|
bool
|
|
ircd::m::request::verify(const ed25519::pk &pk,
|
|
const ed25519::sig &sig)
|
|
const
|
|
{
|
|
// Matrix spec sez that an empty content object {} is excluded entirely
|
|
// from the verification. Our JSON only excludes members if they evaluate
|
|
// to undefined i.e json::object{}/string_view{} but not json::object{"{}"}
|
|
// or even json::object{""}; rather than burdening the caller with ensuring
|
|
// their assignment conforms perfectly, we ensure correctness manually.
|
|
auto _this(*this);
|
|
if(empty(json::get<"content"_>(*this)))
|
|
json::get<"content"_>(_this) = json::object{};
|
|
|
|
const ctx::critical_assertion ca;
|
|
thread_local unique_buffer<mutable_buffer> buf
|
|
{
|
|
size_t(verify_content_max)
|
|
};
|
|
|
|
const size_t request_size
|
|
{
|
|
json::serialized(_this)
|
|
};
|
|
|
|
if(unlikely(request_size > buffer::size(buf)))
|
|
throw m::error
|
|
{
|
|
http::PAYLOAD_TOO_LARGE, "M_REQUEST_TOO_LARGE",
|
|
"The request size %zu bytes exceeds maximum of %zu bytes",
|
|
request_size,
|
|
buffer::size(buf)
|
|
};
|
|
|
|
const json::object object
|
|
{
|
|
stringify(mutable_buffer{buf}, _this)
|
|
};
|
|
|
|
return verify(pk, sig, object);
|
|
}
|
|
|
|
bool
|
|
ircd::m::request::verify(const ed25519::pk &pk,
|
|
const ed25519::sig &sig,
|
|
const json::object &object)
|
|
{
|
|
return pk.verify(object, sig);
|
|
}
|
|
|
|
//
|
|
// x_matrix
|
|
//
|
|
|
|
ircd::m::request::x_matrix::x_matrix(const string_view &input)
|
|
{
|
|
string_view tokens[3];
|
|
if(ircd::tokens(split(input, ' ').second, ',', tokens) != 3)
|
|
throw std::out_of_range
|
|
{
|
|
"The x_matrix header is malformed"
|
|
};
|
|
|
|
for(const auto &token : tokens)
|
|
{
|
|
const auto &kv{split(token, '=')};
|
|
const auto &val{unquote(kv.second)};
|
|
switch(hash(kv.first))
|
|
{
|
|
case hash("origin"): origin = val; break;
|
|
case hash("key"): key = val; break;
|
|
case hash("sig"): sig = val; break;
|
|
}
|
|
}
|
|
|
|
if(empty(origin))
|
|
throw std::out_of_range
|
|
{
|
|
"The x_matrix header is missing 'origin='"
|
|
};
|
|
|
|
if(empty(key))
|
|
throw std::out_of_range
|
|
{
|
|
"The x_matrix header is missing 'key='"
|
|
};
|
|
|
|
if(empty(sig))
|
|
throw std::out_of_range
|
|
{
|
|
"The x_matrix header is missing 'sig='"
|
|
};
|
|
}
|