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Code Issues Releases Wiki Activity

ircd:Ⓜ️ Event verification.

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This commit is contained in:
Jason Volk 2018-03-20 19:01:47 -07:00
parent 0b3ec2b476
commit f121509dba
2 changed files with 140 additions and 0 deletions
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5
include/ircd/m/event.h
View file

@ -81,6 +81,11 @@ struct ircd::m::event
static constexpr size_t MAX_SIZE = 64_KiB;
static conf::item<size_t> max_size;
static bool verify(const string_view &, const ed25519::pk &, const ed25519::sig &sig);
static bool verify(const json::object &, const ed25519::pk &, const ed25519::sig &sig);
static bool verify(const m::event &, const ed25519::pk &, const ed25519::sig &sig);
static bool verify(const m::event &, const ed25519::pk &, const string_view &origin, const string_view &pkid);
static ed25519::sig sign(const string_view &, const ed25519::sk &);
static ed25519::sig sign(const string_view &);
static ed25519::sig sign(const json::object &, const ed25519::sk &);

135
ircd/m/event.cc
View file

@ -677,6 +677,141 @@ ircd::m::event::sign(const string_view &event,
return sig;
}
bool
ircd::m::event::verify(const m::event &event,
const ed25519::pk &pk,
const string_view &origin,
const string_view &keyid)
{
const json::object &signatures
{
at<"signatures"_>(event)
};
const json::object &origin_sigs
{
signatures.at(origin)
};
const ed25519::sig sig
{
[&origin_sigs, &keyid](auto &buf)
{
b64decode(buf, unquote(origin_sigs.at(keyid)));
}
};
return verify(event, pk, sig);
}
bool
ircd::m::event::verify(const m::event &event_,
const ed25519::pk &pk,
const ed25519::sig &sig)
{
//TODO: tuple::keys::selection
m::event event{event_};
json::get<"signatures"_>(event) = {};
const auto &type
{
json::at<"type"_>(event)
};
json::object &content
{
json::get<"content"_>(event)
};
thread_local char contentbuf[64_KiB];
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
{
content = "{}"_sv;
}
thread_local char buf[64_KiB];
const string_view preimage
{
stringify(buf, event)
};
return verify(preimage, pk, sig);
}
bool
ircd::m::event::verify(const json::object &event,
const ed25519::pk &pk,
const ed25519::sig &sig)
{
//TODO: skip rewrite
thread_local char buf[64_KiB];
const string_view preimage
{
stringify(buf, event)
};
return verify(preimage, pk, sig);
}
bool
ircd::m::event::verify(const string_view &event,
const ed25519::pk &pk,
const ed25519::sig &sig)
{
return pk.verify(event, sig);
}
//
// event::prev
//