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ircd:Ⓜ️ Add signature appending routine.

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This commit is contained in:
Jason Volk 2018-05-15 19:53:08 -07:00
parent 7e512eecdc
commit a62f453e58
2 changed files with 43 additions and 0 deletions
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1
include/ircd/m/event.h
View file

@ -119,6 +119,7 @@ struct ircd::m::event
static ed25519::sig sign(json::iov &event, const json::iov &content, const ed25519::sk &);
static ed25519::sig sign(json::iov &event, const json::iov &content);
static string_view signatures(const mutable_buffer &, json::iov &event, const json::iov &content);
friend event signatures(const mutable_buffer &, const m::event &);
friend bool verify_sha256b64(const event &, const string_view &);
friend bool verify_hash(const event &, const sha256::buf &);

42
ircd/m/event.cc
View file

@ -723,6 +723,48 @@ ircd::m::event::signatures(const mutable_buffer &out,
return json::stringify(mutable_buffer{out}, sigs);
}
ircd::m::event
ircd::m::signatures(const mutable_buffer &out,
const m::event &event_)
{
thread_local char content[64_KiB];
m::event event
{
essential(event_, content)
};
thread_local char buf[64_KiB];
const json::object &preimage
{
stringify(buf, event)
};
const ed25519::sig sig
{
sign(preimage)
};
thread_local char sigb64buf[b64encode_size(sizeof(sig))];
const json::member my_sig
{
my_host(), json::members
{
{ self::public_key_id, b64encode_unpadded(sigb64buf, sig) }
}
};
static const size_t SIG_MAX{64};
thread_local std::array<json::member, SIG_MAX> sigs;
size_t i(0);
sigs.at(i++) = my_sig;
for(const auto &other : json::get<"signatures"_>(event_))
sigs.at(i++) = { other.first, other.second };
json::get<"signatures"_>(event) = json::stringify(mutable_buffer{out}, sigs.data(), sigs.data() + i);
return event;
}
ircd::ed25519::sig
ircd::m::event::sign(json::iov &event,
const json::iov &contents)