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construct/include/ircd/ed25519.h
2019-10-02 18:16:55 -07:00

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// 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.
#pragma once
#define HAVE_IRCD_ED25519_H
/// y^2 = x^3 + 486662x^2 + x GF(2^255 19)
namespace ircd::ed25519
{
IRCD_EXCEPTION(ircd::error, error)
IRCD_EXCEPTION(error, bad_sig)
const size_t SK_SZ { 32 + 32 };
const size_t PK_SZ { 32 };
const size_t SIG_SZ { 64 };
const size_t SEED_SZ { 32 };
struct pk;
struct sk;
struct sig;
}
class ircd::ed25519::sk
{
std::unique_ptr<uint8_t[], void (*)(void *)> key;
public:
sig sign(const const_buffer &msg) const;
sk(const string_view &filename, pk *const & = nullptr);
sk(pk *const &, const const_buffer &seed);
sk(): key{nullptr, std::free} {}
};
struct ircd::ed25519::pk
:fixed_mutable_buffer<PK_SZ>
{
bool verify(const const_buffer &msg, const sig &) const;
using fixed_mutable_buffer<PK_SZ>::fixed_mutable_buffer;
pk()
:fixed_mutable_buffer<PK_SZ>{nullptr}
{}
};
struct ircd::ed25519::sig
:fixed_mutable_buffer<SIG_SZ>
{
using fixed_mutable_buffer<SIG_SZ>::fixed_mutable_buffer;
sig()
:fixed_mutable_buffer<SIG_SZ>{nullptr}
{}
};