mirror of
https://github.com/matrix-construct/construct
synced 2024-12-28 16:34:13 +01:00
1468 lines
37 KiB
C++
1468 lines
37 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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ircd::mapi::header
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IRCD_MODULE
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{
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"Matrix event library; modular components."
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};
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namespace ircd::m::vm
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{
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extern const m::hookfn<eval &> issue_missing_auth;
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extern const m::hookfn<eval &> conform_check_origin;
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extern const m::hookfn<eval &> conform_check_size;
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extern const m::hookfn<eval &> conform_report;
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}
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/// Check if an eval with a copts structure (indicating this server is
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/// creating the event) has an origin set to !my_host().
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decltype(ircd::m::vm::conform_check_origin)
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ircd::m::vm::conform_check_origin
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{
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{
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{ "_site", "vm.conform" }
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},
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[](const m::event &event, eval &eval)
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{
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if(unlikely(eval.copts && !my_host(at<"origin"_>(event))))
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throw error
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{
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fault::GENERAL, "Issuing event for origin: %s", at<"origin"_>(event)
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};
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}
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};
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/// Check if an event originating from this server exceeds maximum size.
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decltype(ircd::m::vm::conform_check_size)
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ircd::m::vm::conform_check_size
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{
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{
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{ "_site", "vm.conform" },
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{ "origin", my_host() }
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},
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[](const m::event &event, eval &eval)
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{
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const size_t &event_size
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{
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serialized(event)
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};
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if(event_size > size_t(event::max_size))
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throw m::BAD_JSON
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{
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"Event is %zu bytes which is larger than the maximum %zu bytes",
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event_size,
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size_t(event::max_size)
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};
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}
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};
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/// Check if an event originating from this server exceeds maximum size.
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decltype(ircd::m::vm::conform_report)
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ircd::m::vm::conform_report
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{
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{
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{ "_site", "vm.conform" }
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},
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[](const m::event &event, eval &eval)
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{
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assert(eval.opts);
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auto &opts(*eval.opts);
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// When opts.conformed is set the report is already generated
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if(opts.conformed)
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{
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eval.report = opts.report;
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return;
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}
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// Generate the report here.
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eval.report = event::conforms
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{
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event, opts.non_conform.report
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};
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// When opts.conforming is false a bad report is not an error.
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if(!opts.conforming)
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return;
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// Otherwise this will kill the eval
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if(!eval.report.clean())
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throw error
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{
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fault::INVALID, "Non-conforming event: %s", string(eval.report)
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};
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}
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};
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std::ostream &
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IRCD_MODULE_EXPORT
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ircd::m::pretty(std::ostream &s,
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const event &event)
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{
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const auto out{[&s]
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(const string_view &key, auto&& val)
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{
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if(defined(json::value(val)))
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s << std::setw(16) << std::right << key << " :" << val << std::endl;
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}};
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const string_view top_keys[]
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{
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"origin",
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"event_id",
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"room_id",
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"sender",
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"type",
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"depth",
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"state_key",
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"redacts",
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};
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json::for_each(event, top_keys, out);
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const auto &ts{json::get<"origin_server_ts"_>(event)};
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{
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thread_local char buf[128];
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s << std::setw(16) << std::right << "origin_server_ts" << " :"
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<< timef(buf, ts / 1000L, ircd::localtime)
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<< " (" << ts << ")"
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<< std::endl;
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}
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const json::object &contents{json::get<"content"_>(event)};
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if(!contents.empty())
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s << std::setw(16) << std::right << "content" << " :"
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<< size(contents) << " keys; "
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<< size(string_view{contents}) << " bytes."
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<< std::endl;
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const auto &hashes{json::get<"hashes"_>(event)};
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for(const auto &hash : hashes)
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{
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s << std::setw(16) << std::right << "[hash]" << " :"
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<< hash.first
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<< " "
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<< unquote(hash.second)
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<< std::endl;
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}
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const auto &signatures{json::get<"signatures"_>(event)};
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for(const auto &signature : signatures)
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{
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s << std::setw(16) << std::right << "[signature]" << " :"
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<< signature.first << " ";
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for(const auto &key : json::object{signature.second})
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s << key.first << " ";
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s << std::endl;
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}
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const auto &auth_events{json::get<"auth_events"_>(event)};
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for(const json::array auth_event : auth_events)
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{
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s << std::setw(16) << std::right << "[auth event]"
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<< " :" << unquote(auth_event[0]);
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for(const auto &hash : json::object{auth_event[1]})
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s << " " << unquote(hash.first)
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<< ": " << unquote(hash.second);
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s << std::endl;
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}
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const auto &prev_states{json::get<"prev_state"_>(event)};
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for(const json::array prev_state : prev_states)
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{
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s << std::setw(16) << std::right << "[prev state]"
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<< " :" << unquote(prev_state[0]);
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for(const auto &hash : json::object{prev_state[1]})
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s << " " << unquote(hash.first)
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<< ": " << unquote(hash.second);
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s << std::endl;
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}
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const auto &prev_events{json::get<"prev_events"_>(event)};
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for(const json::array prev_event : prev_events)
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{
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s << std::setw(16) << std::right << "[prev_event]"
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<< " :" << unquote(prev_event[0]);
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for(const auto &hash : json::object{prev_event[1]})
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s << " " << unquote(hash.first)
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<< ": " << unquote(hash.second);
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s << std::endl;
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}
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if(!contents.empty())
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for(const json::object::member &content : contents)
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s << std::setw(16) << std::right << "[content]" << " :"
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<< std::setw(7) << std::left << reflect(json::type(content.second)) << " "
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<< std::setw(5) << std::right << size(string_view{content.second}) << " bytes "
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<< ':' << content.first
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<< std::endl;
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return s;
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}
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std::ostream &
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IRCD_MODULE_EXPORT
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ircd::m::pretty_oneline(std::ostream &s,
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const event &event,
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const bool &content_keys)
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{
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if(defined(json::get<"room_id"_>(event)))
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s << json::get<"room_id"_>(event) << " ";
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else
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s << "* ";
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if(json::get<"depth"_>(event) != json::undefined_number)
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s << json::get<"depth"_>(event) << " ";
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else
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s << "* ";
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if(json::get<"origin_server_ts"_>(event) != json::undefined_number)
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s << json::get<"origin_server_ts"_>(event) << " ";
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else
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s << "* ";
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if(defined(json::get<"origin"_>(event)))
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s << ':' << json::get<"origin"_>(event) << " ";
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else
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s << ":* ";
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if(defined(json::get<"sender"_>(event)))
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s << json::get<"sender"_>(event) << " ";
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else
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s << "* ";
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if(defined(json::get<"event_id"_>(event)))
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s << json::get<"event_id"_>(event) << " ";
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else
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s << "* ";
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const auto &auth_events{json::get<"auth_events"_>(event)};
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s << "A:" << auth_events.count() << " ";
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const auto &prev_states{json::get<"prev_state"_>(event)};
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s << "S:" << prev_states.count() << " ";
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const auto &prev_events{json::get<"prev_events"_>(event)};
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s << "E:" << prev_events.count() << " ";
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const auto &hashes{json::get<"hashes"_>(event)};
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s << "[ ";
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for(const auto &hash : hashes)
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s << hash.first << " ";
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s << "] ";
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const auto &signatures{json::get<"signatures"_>(event)};
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s << "[ ";
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for(const auto &signature : signatures)
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{
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s << signature.first << "[ ";
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for(const auto &key : json::object{signature.second})
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s << key.first << " ";
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s << "] ";
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}
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s << "] ";
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if(defined(json::get<"type"_>(event)))
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s << json::get<"type"_>(event) << " ";
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else
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s << "* ";
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const auto &state_key
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{
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json::get<"state_key"_>(event)
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};
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if(defined(state_key) && empty(state_key))
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s << "\"\"" << " ";
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else if(defined(state_key))
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s << state_key << " ";
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else
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s << "*" << " ";
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const string_view &membership
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{
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json::get<"type"_>(event) == "m.room.member"?
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m::membership(event):
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"*"_sv
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};
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s << membership << " ";
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if(defined(json::get<"redacts"_>(event)))
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s << json::get<"redacts"_>(event) << " ";
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else
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s << "* ";
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const json::object &contents
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{
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content_keys?
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json::get<"content"_>(event):
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json::object{}
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};
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if(!contents.empty())
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{
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s << "+" << string_view{contents}.size() << " bytes :";
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for(const auto &content : contents)
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s << content.first << " ";
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}
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return s;
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}
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std::ostream &
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IRCD_MODULE_EXPORT
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ircd::m::pretty_msgline(std::ostream &s,
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const event &event)
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{
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s << json::get<"depth"_>(event) << " :";
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s << json::get<"type"_>(event) << " ";
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s << json::get<"sender"_>(event) << " ";
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s << json::get<"event_id"_>(event) << " ";
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const auto &state_key
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{
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json::get<"state_key"_>(event)
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};
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if(defined(state_key) && empty(state_key))
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s << "\"\"" << " ";
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else if(defined(state_key))
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s << state_key << " ";
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else
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s << "*" << " ";
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const json::object &content
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{
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json::get<"content"_>(event)
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};
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switch(hash(json::get<"type"_>(event)))
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{
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case "m.room.message"_:
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s << unquote(content.get("msgtype")) << " ";
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s << unquote(content.get("body")) << " ";
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break;
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default:
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s << string_view{content};
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break;
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}
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return s;
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}
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std::ostream &
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IRCD_MODULE_EXPORT
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ircd::m::pretty(std::ostream &s,
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const event::prev &prev)
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{
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const auto out{[&s]
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(const string_view &key, auto&& val)
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{
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if(json::defined(val))
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s << key << " :" << val << std::endl;
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}};
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const auto &auth_events{json::get<"auth_events"_>(prev)};
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for(const json::array auth_event : auth_events)
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{
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s << std::setw(16) << std::right << "[auth event]"
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<< " :" << unquote(auth_event[0]);
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for(const auto &hash : json::object{auth_event[1]})
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s << " " << unquote(hash.first)
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<< ": " << unquote(hash.second);
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s << std::endl;
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}
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const auto &prev_states{json::get<"prev_state"_>(prev)};
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for(const json::array prev_state : prev_states)
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{
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s << std::setw(16) << std::right << "[prev state]"
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<< " :" << unquote(prev_state[0]);
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for(const auto &hash : json::object{prev_state[1]})
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s << " " << unquote(hash.first)
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<< ": " << unquote(hash.second);
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s << std::endl;
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}
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const auto &prev_events{json::get<"prev_events"_>(prev)};
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for(const json::array prev_event : prev_events)
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{
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s << std::setw(16) << std::right << "[prev_event]"
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<< " :" << unquote(prev_event[0]);
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for(const auto &hash : json::object{prev_event[1]})
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s << " " << unquote(hash.first)
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<< ": " << unquote(hash.second);
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s << std::endl;
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}
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return s;
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}
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std::ostream &
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IRCD_MODULE_EXPORT
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ircd::m::pretty_oneline(std::ostream &s,
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const event::prev &prev)
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{
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const auto &auth_events{json::get<"auth_events"_>(prev)};
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s << "A[ ";
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for(const json::array auth_event : auth_events)
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s << unquote(auth_event[0]) << " ";
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s << "] ";
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const auto &prev_states{json::get<"prev_state"_>(prev)};
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s << "S[ ";
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for(const json::array prev_state : prev_states)
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s << unquote(prev_state[0]) << " ";
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s << "] ";
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const auto &prev_events{json::get<"prev_events"_>(prev)};
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s << "E[ ";
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for(const json::array prev_event : prev_events)
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s << unquote(prev_event[0]) << " ";
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s << "] ";
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return s;
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}
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void
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IRCD_MODULE_EXPORT
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ircd::m::append(json::stack::object &object,
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const event &event,
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const event_append_opts &opts)
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{
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const bool has_event_idx
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{
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opts.event_idx && *opts.event_idx
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};
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const bool has_client_txnid
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{
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opts.client_txnid && *opts.client_txnid
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};
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const bool has_user
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{
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opts.user_id && opts.user_room
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};
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const bool sender_is_user
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{
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has_user && json::get<"sender"_>(event) == *opts.user_id
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};
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const auto txnid_idx
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{
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!has_client_txnid && sender_is_user && opts.query_txnid?
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opts.user_room->get(std::nothrow, "ircd.client.txnid", at<"event_id"_>(event)):
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0UL
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};
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#if defined(RB_DEBUG) && 0
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if(!has_client_txnid && !txnid_idx && sender_is_user && opts.query_txnid)
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log::dwarning
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{
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log, "Could not find transaction_id for %s from %s in %s",
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json::get<"event_id"_>(event),
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json::get<"sender"_>(event),
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json::get<"room_id"_>(event)
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};
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#endif
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if(!json::get<"state_key"_>(event) && has_user)
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{
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const m::user::ignores ignores{*opts.user_id};
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if(ignores.enforce("events") && ignores.has(json::get<"sender"_>(event)))
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{
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log::debug
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{
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log, "Not sending event '%s' because '%s' is ignored by '%s'",
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json::get<"event_id"_>(event),
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json::get<"sender"_>(event),
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string_view{*opts.user_id}
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};
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return;
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}
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}
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object.append(event);
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if(json::get<"state_key"_>(event) && has_event_idx)
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{
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const auto prev_idx
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{
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room::state::prev(*opts.event_idx)
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};
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if(prev_idx)
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m::get(std::nothrow, prev_idx, "content", [&object]
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(const json::object &content)
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{
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json::stack::member
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{
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object, "prev_content", content
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};
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});
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}
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json::stack::object unsigned_
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{
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object, "unsigned"
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};
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json::stack::member
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{
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unsigned_, "age", json::value
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{
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opts.age != std::numeric_limits<long>::min()?
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opts.age:
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json::get<"origin_server_ts"_>(event)?
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ircd::time<milliseconds>() - json::get<"origin_server_ts"_>(event):
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0L
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}
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};
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if(has_client_txnid)
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json::stack::member
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{
|
|
unsigned_, "transaction_id", *opts.client_txnid
|
|
};
|
|
|
|
if(txnid_idx)
|
|
m::get(std::nothrow, txnid_idx, "content", [&unsigned_]
|
|
(const json::object &content)
|
|
{
|
|
json::stack::member
|
|
{
|
|
unsigned_, "transaction_id", unquote(content.get("transaction_id"))
|
|
};
|
|
});
|
|
}
|
|
|
|
bool
|
|
IRCD_MODULE_EXPORT
|
|
ircd::m::event::auth::chain::for_each(const auth::chain &c,
|
|
const closure_bool &closure)
|
|
{
|
|
m::event::fetch e, a;
|
|
std::set<event::idx> ae;
|
|
std::deque<event::idx> aq {c.idx}; do
|
|
{
|
|
const auto idx(aq.front());
|
|
aq.pop_front();
|
|
if(!seek(e, idx, std::nothrow))
|
|
continue;
|
|
|
|
const m::event::prev prev{e};
|
|
const auto count(prev.auth_events_count());
|
|
for(size_t i(0); i < count && i < 4; ++i)
|
|
{
|
|
const auto &auth_event_id(prev.auth_event(i));
|
|
const auto &auth_event_idx(index(auth_event_id, std::nothrow));
|
|
if(!auth_event_idx)
|
|
continue;
|
|
|
|
auto it(ae.lower_bound(auth_event_idx));
|
|
if(it == end(ae) || *it != auth_event_idx)
|
|
{
|
|
seek(a, auth_event_idx, std::nothrow);
|
|
ae.emplace_hint(it, auth_event_idx);
|
|
if(a.valid)
|
|
aq.emplace_back(auth_event_idx);
|
|
}
|
|
}
|
|
}
|
|
while(!aq.empty());
|
|
|
|
for(const auto &idx : ae)
|
|
if(!closure(idx))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
IRCD_MODULE_EXPORT
|
|
ircd::m::event::refs::rebuild()
|
|
{
|
|
static const size_t pool_size{96};
|
|
static const size_t log_interval{8192};
|
|
|
|
db::txn txn
|
|
{
|
|
*m::dbs::events
|
|
};
|
|
|
|
auto &column
|
|
{
|
|
dbs::event_json
|
|
};
|
|
|
|
auto it
|
|
{
|
|
column.begin()
|
|
};
|
|
|
|
ctx::dock dock;
|
|
ctx::pool pool;
|
|
pool.min(pool_size);
|
|
|
|
size_t i(0), j(0);
|
|
const ctx::uninterruptible::nothrow ui;
|
|
for(; it; ++it)
|
|
{
|
|
if(ctx::interruption_requested())
|
|
break;
|
|
|
|
const m::event::idx event_idx
|
|
{
|
|
byte_view<m::event::idx>(it->first)
|
|
};
|
|
|
|
std::string event{it->second};
|
|
pool([&txn, &dock, &i, &j, event(std::move(event)), event_idx]
|
|
{
|
|
m::dbs::write_opts wopts;
|
|
wopts.event_idx = event_idx;
|
|
|
|
m::dbs::_index_event_refs(txn, json::object{event}, wopts);
|
|
|
|
if(++j % log_interval == 0) log::info
|
|
{
|
|
m::log, "Refs builder @%zu:%zu of %lu (@idx: %lu)",
|
|
i,
|
|
j,
|
|
m::vm::sequence::retired,
|
|
event_idx
|
|
};
|
|
|
|
if(j >= i)
|
|
dock.notify_one();
|
|
});
|
|
|
|
++i;
|
|
}
|
|
|
|
dock.wait([&i, &j]
|
|
{
|
|
return i == j;
|
|
});
|
|
|
|
txn();
|
|
}
|
|
|
|
ircd::string_view
|
|
IRCD_MODULE_EXPORT
|
|
ircd::m::event::auth::failed(const m::event &event)
|
|
{
|
|
const m::event::prev refs(event);
|
|
const auto count(refs.auth_events_count());
|
|
if(count > 4)
|
|
return "Too many auth_events references.";
|
|
|
|
const m::event *authv[4];
|
|
const m::event::fetch auth[4]
|
|
{
|
|
{ count > 0? refs.auth_event(0) : event::id{}, std::nothrow },
|
|
{ count > 1? refs.auth_event(1) : event::id{}, std::nothrow },
|
|
{ count > 2? refs.auth_event(2) : event::id{}, std::nothrow },
|
|
{ count > 3? refs.auth_event(3) : event::id{}, std::nothrow },
|
|
};
|
|
|
|
size_t i(0), j(0);
|
|
for(; i < 4; ++i)
|
|
if(auth[i].valid)
|
|
authv[j++] = &auth[i];
|
|
|
|
return failed(event, {authv, j});
|
|
}
|
|
|
|
ircd::string_view
|
|
IRCD_MODULE_EXPORT
|
|
ircd::m::event::auth::failed(const m::event &event,
|
|
const vector_view<const m::event *> &auth_events)
|
|
{
|
|
const m::event::prev refs{event};
|
|
|
|
// 1. If type is m.room.create
|
|
if(json::get<"type"_>(event) == "m.room.create")
|
|
{
|
|
// a. If it has any previous events, reject.
|
|
if(count(refs) || !empty(auth_events))
|
|
return "m.room.create has previous events.";
|
|
|
|
// b. If the domain of the room_id does not match the domain of the
|
|
// sender, reject.
|
|
assert(!conforms(event).has(conforms::MISMATCH_CREATE_SENDER));
|
|
if(conforms(event).has(conforms::MISMATCH_CREATE_SENDER))
|
|
return "m.room.create room_id domain does not match sender domain.";
|
|
|
|
// c. If content.room_version is present and is not a recognised
|
|
// version, reject.
|
|
if(json::get<"content"_>(event).has("room_version"))
|
|
if(unquote(json::get<"content"_>(event).get("room_version")) != "1")
|
|
return "m.room.create room_version is not recognized.";
|
|
|
|
// d. If content has no creator field, reject.
|
|
assert(!empty(json::get<"content"_>(event).get("creator")));
|
|
if(empty(json::get<"content"_>(event).get("creator")))
|
|
return "m.room.create content.creator is missing.";
|
|
|
|
// e. Otherwise, allow.
|
|
return {};
|
|
}
|
|
|
|
// 2. Reject if event has auth_events that:
|
|
const m::event *auth_create{nullptr};
|
|
const m::event *auth_power{nullptr};
|
|
const m::event *auth_join_rules{nullptr};
|
|
const m::event *auth_member_target{nullptr};
|
|
const m::event *auth_member_sender{nullptr};
|
|
for(size_t i(0); i < auth_events.size(); ++i)
|
|
{
|
|
// a. have duplicate entries for a given type and state_key pair
|
|
assert(auth_events.at(i));
|
|
const m::event &a(*auth_events.at(i));
|
|
for(size_t j(0); j < auth_events.size(); ++j) if(i != j)
|
|
{
|
|
assert(auth_events.at(j));
|
|
const auto &b(*auth_events.at(j));
|
|
if(json::get<"type"_>(a) == json::get<"type"_>(b))
|
|
if(json::get<"state_key"_>(a) == json::get<"state_key"_>(b))
|
|
return "Duplicate (type,state_key) in auth_events.";
|
|
}
|
|
|
|
// b. have entries whose type and state_key don't match those specified by
|
|
// the auth events selection algorithm described in the server...
|
|
const auto &type(json::get<"type"_>(a));
|
|
if(type == "m.room.create")
|
|
{
|
|
assert(!auth_create);
|
|
auth_create = &a;
|
|
continue;
|
|
}
|
|
|
|
if(type == "m.room.power_levels")
|
|
{
|
|
assert(!auth_power);
|
|
auth_power = &a;
|
|
continue;
|
|
}
|
|
|
|
if(type == "m.room.join_rules")
|
|
{
|
|
assert(!auth_join_rules);
|
|
auth_join_rules = &a;
|
|
continue;
|
|
}
|
|
|
|
if(type == "m.room.member")
|
|
{
|
|
if(json::get<"sender"_>(event) == json::get<"state_key"_>(a))
|
|
{
|
|
assert(!auth_member_sender);
|
|
auth_member_sender = &a;
|
|
}
|
|
|
|
if(json::get<"state_key"_>(event) == json::get<"state_key"_>(a))
|
|
{
|
|
assert(!auth_member_target);
|
|
auth_member_target = &a;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
return "Reference in auth_events is not an auth_event.";
|
|
}
|
|
|
|
// 3. If event does not have a m.room.create in its auth_events, reject.
|
|
if(!auth_create)
|
|
return "Missing m.room.create in auth_events";
|
|
|
|
const m::room::power power
|
|
{
|
|
auth_power? *auth_power : m::event{}, *auth_create
|
|
};
|
|
|
|
// 4. If type is m.room.aliases:
|
|
if(json::get<"type"_>(event) == "m.room.aliases")
|
|
{
|
|
// a. If event has no state_key, reject.
|
|
assert(!conforms(event).has(conforms::MISMATCH_ALIASES_STATE_KEY));
|
|
if(empty(json::get<"state_key"_>(event)))
|
|
return "m.room.aliases event is missing a state_key.";
|
|
|
|
// b. If sender's domain doesn't matches state_key, reject.
|
|
if(json::get<"state_key"_>(event) != m::user::id(json::get<"sender"_>(event)).host())
|
|
return "m.room.aliases event state_key is not the sender's domain.";
|
|
|
|
// c. Otherwise, allow
|
|
return {};
|
|
}
|
|
|
|
// 5. If type is m.room.member:
|
|
if(json::get<"type"_>(event) == "m.room.member")
|
|
{
|
|
// a. If no state_key key ...
|
|
assert(!conforms(event).has(conforms::MISSING_MEMBER_STATE_KEY));
|
|
if(empty(json::get<"state_key"_>(event)))
|
|
return "m.room.member event is missing a state_key.";
|
|
|
|
// a. ... or membership key in content, reject.
|
|
assert(!conforms(event).has(conforms::MISSING_CONTENT_MEMBERSHIP));
|
|
if(empty(unquote(json::get<"content"_>(event).get("membership"))))
|
|
return "m.room.member event is missing a content.membership.";
|
|
|
|
assert(!conforms(event).has(conforms::INVALID_MEMBER_STATE_KEY));
|
|
if(!valid(m::id::USER, json::get<"state_key"_>(event)))
|
|
return "m.room.member event state_key is not a valid user mxid.";
|
|
|
|
// b. If membership is join
|
|
if(membership(event) == "join")
|
|
{
|
|
// i. If the only previous event is an m.room.create and the
|
|
// state_key is the creator, allow.
|
|
if(refs.prev_events_count() == 1 && refs.auth_events_count() == 1)
|
|
if(auth_create && at<"event_id"_>(*auth_create) == refs.prev_event(0))
|
|
return {};
|
|
|
|
// ii. If the sender does not match state_key, reject.
|
|
if(json::get<"sender"_>(event) != json::get<"state_key"_>(event))
|
|
return "m.room.member membership=join sender does not match state_key.";
|
|
|
|
// iii. If the sender is banned, reject.
|
|
if(auth_member_target)
|
|
if(membership(*auth_member_target) == "ban")
|
|
return "m.room.member membership=join references membership=ban auth_event.";
|
|
|
|
if(auth_member_sender)
|
|
if(membership(*auth_member_sender) == "ban")
|
|
return "m.room.member membership=join references membership=ban auth_event.";
|
|
|
|
if(auth_join_rules)
|
|
{
|
|
// iv. If the join_rule is invite then allow if membership state
|
|
// is invite or join.
|
|
if(unquote(json::get<"content"_>(*auth_join_rules).get("join_rule")) == "invite")
|
|
if(auth_member_target)
|
|
{
|
|
if(membership(*auth_member_target) == "invite")
|
|
return {};
|
|
|
|
if(membership(*auth_member_target) == "join")
|
|
return {};
|
|
}
|
|
|
|
// v. If the join_rule is public, allow.
|
|
if(unquote(json::get<"content"_>(*auth_join_rules).get("join_rule")) == "public")
|
|
return {};
|
|
|
|
}
|
|
|
|
// vi. Otherwise, reject.
|
|
return "m.room.member membership=join fails authorization.";
|
|
}
|
|
|
|
// c. If membership is invite
|
|
if(membership(event) == "invite")
|
|
{
|
|
// i. If content has third_party_invite key
|
|
if(json::get<"content"_>(event).has("third_party_invite"))
|
|
{
|
|
//TODO: XXX
|
|
// 1. If target user is banned, reject.
|
|
// 2. If content.third_party_invite does not have a signed key, reject.
|
|
// 3. If signed does not have mxid and token keys, reject.
|
|
// 4. If mxid does not match state_key, reject.
|
|
// 5. If there is no m.room.third_party_invite event in the current room state with state_key matching token, reject.
|
|
// 6. If sender does not match sender of the m.room.third_party_invite, reject.
|
|
// 7. If any signature in signed matches any public key in the m.room.third_party_invite event, allow. The public keys are in content of m.room.third_party_invite as:
|
|
// 7.1. A single public key in the public_key field.
|
|
// 7.2. A list of public keys in the public_keys field.
|
|
// 8. Otherwise, reject.
|
|
return "third_party_invite fails authorization.";
|
|
}
|
|
|
|
// ii. If the sender's current membership state is not join, reject.
|
|
if(auth_member_sender)
|
|
if(membership(*auth_member_sender) != "join")
|
|
return "m.room.member membership=invite sender must have membership=join.";
|
|
|
|
// iii. If target user's current membership state is join or ban, reject.
|
|
if(auth_member_target)
|
|
{
|
|
if(membership(*auth_member_target) == "join")
|
|
return "m.room.member membership=invite target cannot have membership=join.";
|
|
|
|
if(membership(*auth_member_target) == "ban")
|
|
return "m.room.member membership=invite target cannot have membership=ban.";
|
|
}
|
|
|
|
// iv. If the sender's power level is greater than or equal to the invite level,
|
|
// allow.
|
|
if(power(at<"sender"_>(event), "invite"))
|
|
return {};
|
|
|
|
// v. Otherwise, reject.
|
|
return "m.room.member membership=invite fails authorization.";
|
|
}
|
|
|
|
// d. If membership is leave
|
|
if(membership(event) == "leave")
|
|
{
|
|
// i. If the sender matches state_key, allow if and only if that
|
|
// user's current membership state is invite or join.
|
|
if(json::get<"sender"_>(event) == json::get<"state_key"_>(event))
|
|
{
|
|
if(membership(*auth_member_target) == "join")
|
|
return {};
|
|
|
|
if(membership(*auth_member_target) == "invite")
|
|
return {};
|
|
|
|
return "m.room.member membership=leave self-target must have membership=join|invite.";
|
|
}
|
|
|
|
// ii. If the sender's current membership state is not join, reject.
|
|
if(auth_member_sender)
|
|
if(membership(*auth_member_sender) != "join")
|
|
return "m.room.member membership=leave sender must have membership=join.";
|
|
|
|
// iii. If the target user's current membership state is ban, and the sender's
|
|
// power level is less than the ban level, reject.
|
|
if(auth_member_target)
|
|
if(membership(*auth_member_target) == "ban")
|
|
if(!power(at<"sender"_>(event), "ban"))
|
|
return "m.room.member membership=ban->leave sender must have ban power to unban.";
|
|
|
|
// iv. If the sender's power level is greater than or equal to the
|
|
// kick level, and the target user's power level is less than the
|
|
// sender's power level, allow.
|
|
if(power(at<"sender"_>(event), "kick"))
|
|
if(power.level_user(at<"state_key"_>(event)) < power.level_user(at<"sender"_>(event)))
|
|
return {};
|
|
|
|
// v. Otherwise, reject.
|
|
return "m.room.member membership=leave fails authorization.";
|
|
}
|
|
|
|
// e. If membership is ban
|
|
if(membership(event) == "ban")
|
|
{
|
|
// i. If the sender's current membership state is not join, reject.
|
|
if(auth_member_sender)
|
|
if(membership(*auth_member_sender) != "join")
|
|
return "m.room.member membership=ban sender must have membership=join.";
|
|
|
|
// ii. If the sender's power level is greater than or equal to the
|
|
// ban level, and the target user's power level is less than the
|
|
// sender's power level, allow.
|
|
if(power(at<"sender"_>(event), "ban"))
|
|
if(power.level_user(at<"state_key"_>(event)) < power.level_user(at<"sender"_>(event)))
|
|
return {};
|
|
|
|
// iii. Otherwise, reject.
|
|
return "m.room.member membership=ban fails authorization.";
|
|
}
|
|
|
|
// f. Otherwise, the membership is unknown. Reject.
|
|
return "m.room.member membership=unknown.";
|
|
}
|
|
|
|
// 6. If the sender's current membership state is not join, reject.
|
|
if(auth_member_sender)
|
|
if(membership(*auth_member_sender) != "join")
|
|
return "sender is not joined to room.";
|
|
|
|
// 7. If type is m.room.third_party_invite:
|
|
if(json::get<"type"_>(event) == "m.room.third_party_invite")
|
|
{
|
|
// a. Allow if and only if sender's current power level is greater
|
|
// than or equal to the invite level.
|
|
if(power(at<"sender"_>(event), "invite"))
|
|
return {};
|
|
|
|
return "sender has power level less than required for invite.";
|
|
}
|
|
|
|
// 8. If the event type's required power level is greater than the
|
|
// sender's power level, reject.
|
|
if(!power(at<"sender"_>(event), "events", at<"type"_>(event)))
|
|
return "sender has insufficient power for event type.";
|
|
|
|
// 9. If the event has a state_key that starts with an @ and does not
|
|
// match the sender, reject.
|
|
if(startswith(json::get<"state_key"_>(event), '@'))
|
|
if(at<"state_key"_>(event) != at<"sender"_>(event))
|
|
return "sender cannot set another user's mxid in a state_key.";
|
|
|
|
// 10. If type is m.room.power_levels:
|
|
if(json::get<"type"_>(event) == "m.room.power_levels")
|
|
{
|
|
// a. If users key in content is not a dictionary with keys that are
|
|
// valid user IDs with values that are integers (or a string that is
|
|
// an integer), reject.
|
|
if(json::type(json::get<"content"_>(event).get("users")) != json::OBJECT)
|
|
return "m.room.power_levels content.users is not a json object.";
|
|
|
|
for(const auto &member : json::object(at<"content"_>(event).at("users")))
|
|
{
|
|
if(!m::valid(m::id::USER, member.first))
|
|
return "m.room.power_levels content.users key is not a user mxid";
|
|
|
|
if(!try_lex_cast<int64_t>(unquote(member.second)))
|
|
return "m.room.power_levels content.users value is not an integer.";
|
|
}
|
|
|
|
// b. If there is no previous m.room.power_levels event in the room, allow.
|
|
if(!auth_power)
|
|
return {};
|
|
|
|
const m::room::power old_power{*auth_power, *auth_create};
|
|
const m::room::power new_power{event, *auth_create};
|
|
const int64_t current_level
|
|
{
|
|
old_power.level_user(at<"sender"_>(event))
|
|
};
|
|
|
|
// c. For each of the keys users_default, events_default,
|
|
// state_default, ban, redact, kick, invite, as well as each entry
|
|
// being changed under the events or users keys:
|
|
static const string_view keys[]
|
|
{
|
|
"users_default",
|
|
"events_default",
|
|
"state_default",
|
|
"ban",
|
|
"redact",
|
|
"kick",
|
|
"invite",
|
|
};
|
|
|
|
for(const auto &key : keys)
|
|
{
|
|
const int64_t old_level(old_power.level(key));
|
|
const int64_t new_level(new_power.level(key));
|
|
if(old_level == new_level)
|
|
continue;
|
|
|
|
// i. If the current value is higher than the sender's current
|
|
// power level, reject.
|
|
if(old_level > current_level)
|
|
return "m.room.power_levels property denied to sender's power level.";
|
|
|
|
// ii. If the new value is higher than the sender's current power
|
|
// level, reject.
|
|
if(new_level > current_level)
|
|
return "m.room.power_levels property exceeds sender's power level.";
|
|
}
|
|
|
|
string_view ret;
|
|
using closure = m::room::power::closure_bool;
|
|
old_power.for_each("users", closure{[&ret, &new_power, ¤t_level]
|
|
(const string_view &user_id, const int64_t &old_level)
|
|
{
|
|
if(new_power.has_user(user_id))
|
|
if(new_power.level_user(user_id) == old_level)
|
|
return true;
|
|
|
|
// i. If the current value is higher than the sender's current
|
|
// power level, reject.
|
|
if(old_level > current_level)
|
|
{
|
|
ret = "m.room.power_levels user property denied to sender's power level.";
|
|
return false;
|
|
};
|
|
|
|
// ii. If the new value is higher than the sender's current power
|
|
// level, reject.
|
|
if(new_power.level_user(user_id) > current_level)
|
|
{
|
|
ret = "m.room.power_levels user property exceeds sender's power level.";
|
|
return false;
|
|
};
|
|
|
|
return true;
|
|
}});
|
|
|
|
if(ret)
|
|
return ret;
|
|
|
|
new_power.for_each("users", closure{[&ret, &old_power, ¤t_level]
|
|
(const string_view &user_id, const int64_t &new_level)
|
|
{
|
|
if(old_power.has_user(user_id))
|
|
if(old_power.level_user(user_id) == new_level)
|
|
return true;
|
|
|
|
// i. If the current value is higher than the sender's current
|
|
// power level, reject.
|
|
if(new_level > current_level)
|
|
{
|
|
ret = "m.room.power_levels user property exceeds sender's power level.";
|
|
return false;
|
|
};
|
|
|
|
return true;
|
|
}});
|
|
|
|
if(ret)
|
|
return ret;
|
|
|
|
old_power.for_each("events", closure{[&ret, &new_power, ¤t_level]
|
|
(const string_view &type, const int64_t &old_level)
|
|
{
|
|
if(new_power.has_event(type))
|
|
if(new_power.level_event(type) == old_level)
|
|
return true;
|
|
|
|
// i. If the current value is higher than the sender's current
|
|
// power level, reject.
|
|
if(old_level > current_level)
|
|
{
|
|
ret = "m.room.power_levels event property denied to sender's power level.";
|
|
return false;
|
|
};
|
|
|
|
// ii. If the new value is higher than the sender's current power
|
|
// level, reject.
|
|
if(new_power.level_event(type) > current_level)
|
|
{
|
|
ret = "m.room.power_levels event property exceeds sender's power level.";
|
|
return false;
|
|
};
|
|
|
|
return true;
|
|
}});
|
|
|
|
if(ret)
|
|
return ret;
|
|
|
|
new_power.for_each("events", closure{[&ret, &old_power, ¤t_level]
|
|
(const string_view &type, const int64_t &new_level)
|
|
{
|
|
if(old_power.has_event(type))
|
|
if(old_power.level_event(type) == new_level)
|
|
return true;
|
|
|
|
// i. If the current value is higher than the sender's current
|
|
// power level, reject.
|
|
if(new_level > current_level)
|
|
{
|
|
ret = "m.room.power_levels event property exceeds sender's power level.";
|
|
return false;
|
|
};
|
|
|
|
return true;
|
|
}});
|
|
|
|
// d. For each entry being changed under the users key...
|
|
old_power.for_each("users", closure{[&ret, &event, &new_power, ¤t_level]
|
|
(const string_view &user_id, const int64_t &old_level)
|
|
{
|
|
// ...other than the sender's own entry:
|
|
if(user_id == at<"sender"_>(event))
|
|
return true;
|
|
|
|
if(new_power.has_user(user_id))
|
|
if(new_power.level_user(user_id) == old_level)
|
|
return true;
|
|
|
|
// i. If the current value is equal to the sender's current power
|
|
// level, reject.
|
|
if(old_level == current_level)
|
|
{
|
|
ret = "m.room.power_levels user property denied to sender's power level.";
|
|
return false;
|
|
};
|
|
|
|
return true;
|
|
}});
|
|
|
|
if(ret)
|
|
return ret;
|
|
|
|
// e. Otherwise, allow.
|
|
assert(!ret);
|
|
return ret;
|
|
}
|
|
|
|
// 11. If type is m.room.redaction:
|
|
if(json::get<"type"_>(event) == "m.room.redaction")
|
|
{
|
|
// a. If the sender's power level is greater than or equal to the
|
|
// redact level, allow.
|
|
if(power(at<"sender"_>(event), "redact"))
|
|
return {};
|
|
|
|
// b. If the domain of the event_id of the event being redacted is the
|
|
// same as the domain of the event_id of the m.room.redaction, allow.
|
|
if(event::id(json::get<"redacts"_>(event)).host() == event::id(at<"event_id"_>(event)).host())
|
|
return {};
|
|
|
|
// c. Otherwise, reject.
|
|
return "m.room.redaction fails authorization.";
|
|
}
|
|
|
|
// 12. Otherwise, allow.
|
|
return {};
|
|
}
|
|
|
|
bool
|
|
IRCD_MODULE_EXPORT
|
|
ircd::m::event::auth::is_power_event(const m::event &event)
|
|
{
|
|
if(json::get<"type"_>(event) == "m.room.create")
|
|
return true;
|
|
|
|
if(json::get<"type"_>(event) == "m.room.power_levels")
|
|
return true;
|
|
|
|
if(json::get<"type"_>(event) == "m.room.join_rules")
|
|
return true;
|
|
|
|
if(json::get<"type"_>(event) != "m.room.member")
|
|
return false;
|
|
|
|
if(at<"sender"_>(event) == at<"state_key"_>(event))
|
|
return false;
|
|
|
|
if(membership(event) == "leave" || membership(event) == "ban")
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
void
|
|
IRCD_MODULE_EXPORT
|
|
ircd::m::event::essential(json::iov &event,
|
|
const json::iov &contents,
|
|
const event::closure_iov_mutable &closure)
|
|
{
|
|
const auto &type
|
|
{
|
|
event.at("type")
|
|
};
|
|
|
|
if(type == "m.room.aliases")
|
|
{
|
|
const json::iov::push _content{event,
|
|
{
|
|
"content", json::members
|
|
{
|
|
{ "aliases", contents.at("aliases") }
|
|
}
|
|
}};
|
|
|
|
closure(event);
|
|
}
|
|
else if(type == "m.room.create")
|
|
{
|
|
const json::iov::push _content{event,
|
|
{
|
|
"content", json::members
|
|
{
|
|
{ "creator", contents.at("creator") }
|
|
}
|
|
}};
|
|
|
|
closure(event);
|
|
}
|
|
else if(type == "m.room.history_visibility")
|
|
{
|
|
const json::iov::push _content{event,
|
|
{
|
|
"content", json::members
|
|
{
|
|
{ "history_visibility", contents.at("history_visibility") }
|
|
}
|
|
}};
|
|
|
|
closure(event);
|
|
}
|
|
else if(type == "m.room.join_rules")
|
|
{
|
|
const json::iov::push _content{event,
|
|
{
|
|
"content", json::members
|
|
{
|
|
{ "join_rule", contents.at("join_rule") }
|
|
}
|
|
}};
|
|
|
|
closure(event);
|
|
}
|
|
else if(type == "m.room.member")
|
|
{
|
|
const json::iov::push _content{event,
|
|
{
|
|
"content", json::members
|
|
{
|
|
{ "membership", contents.at("membership") }
|
|
}
|
|
}};
|
|
|
|
closure(event);
|
|
}
|
|
else if(type == "m.room.power_levels")
|
|
{
|
|
const json::iov::push _content{event,
|
|
{
|
|
"content", json::members
|
|
{
|
|
{ "ban", contents.at("ban") },
|
|
{ "events", contents.at("events") },
|
|
{ "events_default", contents.at("events_default") },
|
|
{ "kick", contents.at("kick") },
|
|
{ "redact", contents.at("redact") },
|
|
{ "state_default", contents.at("state_default") },
|
|
{ "users", contents.at("users") },
|
|
{ "users_default", contents.at("users_default") },
|
|
}
|
|
}};
|
|
|
|
closure(event);
|
|
}
|
|
else if(type == "m.room.redaction")
|
|
{
|
|
// This simply finds the redacts key and swaps it with jsundefined for
|
|
// the scope's duration. The redacts key will still be present and
|
|
// visible in the json::iov which is incorrect if directly serialized.
|
|
// However, this iov is turned into a json::tuple (m::event) which ends
|
|
// up being serialized for signing. That serialization is where the
|
|
// jsundefined redacts value is ignored.
|
|
auto &redacts{event.at("redacts")};
|
|
json::value temp(std::move(redacts));
|
|
redacts = json::value{};
|
|
const unwind _{[&redacts, &temp]
|
|
{
|
|
redacts = std::move(temp);
|
|
}};
|
|
|
|
const json::iov::push _content
|
|
{
|
|
event, { "content", "{}" }
|
|
};
|
|
|
|
closure(event);
|
|
}
|
|
else
|
|
{
|
|
const json::iov::push _content
|
|
{
|
|
event, { "content", "{}" }
|
|
};
|
|
|
|
closure(event);
|
|
}
|
|
}
|
|
|
|
ircd::m::event
|
|
IRCD_MODULE_EXPORT
|
|
ircd::m::essential(m::event event,
|
|
const mutable_buffer &contentbuf)
|
|
{
|
|
const auto &type
|
|
{
|
|
json::at<"type"_>(event)
|
|
};
|
|
|
|
json::object &content
|
|
{
|
|
json::get<"content"_>(event)
|
|
};
|
|
|
|
mutable_buffer essential
|
|
{
|
|
contentbuf
|
|
};
|
|
|
|
if(type == "m.room.aliases")
|
|
{
|
|
content = json::stringify(essential, json::members
|
|
{
|
|
{ "aliases", unquote(content.at("aliases")) }
|
|
});
|
|
}
|
|
else if(type == "m.room.create")
|
|
{
|
|
content = json::stringify(essential, json::members
|
|
{
|
|
{ "creator", unquote(content.at("creator")) }
|
|
});
|
|
}
|
|
else if(type == "m.room.history_visibility")
|
|
{
|
|
content = json::stringify(essential, json::members
|
|
{
|
|
{ "history_visibility", unquote(content.at("history_visibility")) }
|
|
});
|
|
}
|
|
else if(type == "m.room.join_rules")
|
|
{
|
|
content = json::stringify(essential, json::members
|
|
{
|
|
{ "join_rule", unquote(content.at("join_rule")) }
|
|
});
|
|
}
|
|
else if(type == "m.room.member")
|
|
{
|
|
content = json::stringify(essential, json::members
|
|
{
|
|
{ "membership", unquote(content.at("membership")) }
|
|
});
|
|
}
|
|
else if(type == "m.room.power_levels")
|
|
{
|
|
content = json::stringify(essential, json::members
|
|
{
|
|
{ "ban", unquote(content.at("ban")) },
|
|
{ "events", unquote(content.at("events")) },
|
|
{ "events_default", unquote(content.at("events_default")) },
|
|
{ "kick", unquote(content.at("kick")) },
|
|
{ "redact", unquote(content.at("redact")) },
|
|
{ "state_default", unquote(content.at("state_default")) },
|
|
{ "users", unquote(content.at("users")) },
|
|
{ "users_default", unquote(content.at("users_default")) },
|
|
});
|
|
}
|
|
else if(type == "m.room.redaction")
|
|
{
|
|
json::get<"redacts"_>(event) = string_view{};
|
|
content = "{}"_sv;
|
|
}
|
|
else
|
|
{
|
|
content = "{}"_sv;
|
|
}
|
|
|
|
json::get<"signatures"_>(event) = {};
|
|
return event;
|
|
}
|