SecretKey.h

//------------------------------------------------------------------------------
/*
    This file is part of rippled: https://github.com/ripple/rippled
    Copyright (c) 2012, 2013 Ripple Labs Inc.
 
    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 appear in all copies.
 
    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
 
#ifndef RIPPLE_PROTOCOL_SECRETKEY_H_INCLUDED
#define RIPPLE_PROTOCOL_SECRETKEY_H_INCLUDED
 
#include <ripple/basics/Buffer.h>
#include <ripple/basics/Slice.h>
#include <ripple/protocol/KeyType.h>
#include <ripple/protocol/PublicKey.h>
#include <ripple/protocol/Seed.h>
#include <ripple/protocol/tokens.h>
#include <array>
#include <cstring>
#include <string>
 
namespace ripple {
 
class SecretKey
{
private:
    std::uint8_t buf_[32];
 
public:
    using const_iterator = std::uint8_t const*;
 
    SecretKey() = default;
    SecretKey (SecretKey const&) = default;
    SecretKey& operator= (SecretKey const&) = default;
 
    ~SecretKey();
 
    SecretKey (std::array<std::uint8_t, 32> const& data);
    SecretKey (Slice const& slice);
 
    std::uint8_t const*
    data() const
    {
        return buf_;
    }
 
    std::size_t
    size() const
    {
        return sizeof(buf_);
    }
 
    std::string
    to_string() const;
 
    const_iterator
    begin() const noexcept
    {
        return buf_;
    }
 
    const_iterator
    cbegin() const noexcept
    {
        return buf_;
    }
 
    const_iterator
    end() const noexcept
    {
        return buf_ + sizeof(buf_);
    }
 
    const_iterator
    cend() const noexcept
    {
        return buf_ + sizeof(buf_);
    }
};
 
inline
bool
operator== (SecretKey const& lhs,
    SecretKey const& rhs)
{
    return lhs.size() == rhs.size() &&
        std::memcmp(lhs.data(), rhs.data(), rhs.size()) == 0;
}
 
inline
bool
operator!= (SecretKey const& lhs,
    SecretKey const& rhs)
{
    return ! (lhs == rhs);
}
 
//------------------------------------------------------------------------------
 
template <>
boost::optional<SecretKey>
parseBase58 (TokenType type, std::string const& s);
 
inline
std::string
toBase58 (TokenType type, SecretKey const& sk)
{
    return base58EncodeToken(
        type, sk.data(), sk.size());
}
 
SecretKey
randomSecretKey();
 
SecretKey
generateSecretKey (KeyType type, Seed const& seed);
 
PublicKey
derivePublicKey (KeyType type, SecretKey const& sk);
 
std::pair<PublicKey, SecretKey>
generateKeyPair (KeyType type, Seed const& seed);
 
std::pair<PublicKey, SecretKey>
randomKeyPair (KeyType type);
 
Buffer
signDigest (PublicKey const& pk, SecretKey const& sk,
    uint256 const& digest);
 
inline
Buffer
signDigest (KeyType type, SecretKey const& sk,
    uint256 const& digest)
{
    return signDigest (derivePublicKey(type, sk), sk, digest);
}
Buffer
sign (PublicKey const& pk,
    SecretKey const& sk, Slice const& message);
 
inline
Buffer
sign (KeyType type, SecretKey const& sk,
    Slice const& message)
{
    return sign (derivePublicKey(type, sk), sk, message);
}
} // ripple
 
#endif