PublicKey.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_PUBLICKEY_H_INCLUDED
#define RIPPLE_PROTOCOL_PUBLICKEY_H_INCLUDED
 
#include <xrpl/basics/Slice.h>
#include <xrpl/protocol/KeyType.h>
#include <xrpl/protocol/STExchange.h>
#include <xrpl/protocol/UintTypes.h>
#include <xrpl/protocol/json_get_or_throw.h>
#include <xrpl/protocol/tokens.h>
 
#include <algorithm>
#include <cstdint>
#include <cstring>
#include <optional>
#include <ostream>
#include <utility>
 
namespace ripple {
 
class PublicKey
{
protected:
    // All the constructed public keys are valid, non-empty and contain 33
    // bytes of data.
    static constexpr std::size_t size_ = 33;
    std::uint8_t buf_[size_];  // should be large enough
 
public:
    using const_iterator = std::uint8_t const*;
 
public:
    PublicKey() = delete;
 
    PublicKey(PublicKey const& other);
    PublicKey&
    operator=(PublicKey const& other);
 
    explicit PublicKey(Slice const& slice);
 
    std::uint8_t const*
    data() const noexcept
    {
        return buf_;
    }
 
    std::size_t
    size() const noexcept
    {
        return size_;
    }
 
    const_iterator
    begin() const noexcept
    {
        return buf_;
    }
 
    const_iterator
    cbegin() const noexcept
    {
        return buf_;
    }
 
    const_iterator
    end() const noexcept
    {
        return buf_ + size_;
    }
 
    const_iterator
    cend() const noexcept
    {
        return buf_ + size_;
    }
 
    Slice
    slice() const noexcept
    {
        return {buf_, size_};
    }
 
    operator Slice() const noexcept
    {
        return slice();
    }
};
 
std::ostream&
operator<<(std::ostream& os, PublicKey const& pk);
 
inline bool
operator==(PublicKey const& lhs, PublicKey const& rhs)
{
    return std::memcmp(lhs.data(), rhs.data(), rhs.size()) == 0;
}
 
inline bool
operator<(PublicKey const& lhs, PublicKey const& rhs)
{
    return std::lexicographical_compare(
        lhs.data(),
        lhs.data() + lhs.size(),
        rhs.data(),
        rhs.data() + rhs.size());
}
 
template <class Hasher>
void
hash_append(Hasher& h, PublicKey const& pk)
{
    h(pk.data(), pk.size());
}
 
template <>
struct STExchange<STBlob, PublicKey>
{
    explicit STExchange() = default;
 
    using value_type = PublicKey;
 
    static void
    get(std::optional<value_type>& t, STBlob const& u)
    {
        t.emplace(Slice(u.data(), u.size()));
    }
 
    static std::unique_ptr<STBlob>
    set(SField const& f, PublicKey const& t)
    {
        return std::make_unique<STBlob>(f, t.data(), t.size());
    }
};
 
//------------------------------------------------------------------------------
 
inline std::string
toBase58(TokenType type, PublicKey const& pk)
{
    return encodeBase58Token(type, pk.data(), pk.size());
}
 
template <>
std::optional<PublicKey>
parseBase58(TokenType type, std::string const& s);
 
enum class ECDSACanonicality { canonical, fullyCanonical };
 
std::optional<ECDSACanonicality>
ecdsaCanonicality(Slice const& sig);
 
[[nodiscard]] std::optional<KeyType>
publicKeyType(Slice const& slice);
 
[[nodiscard]] inline std::optional<KeyType>
publicKeyType(PublicKey const& publicKey)
{
    return publicKeyType(publicKey.slice());
}
[[nodiscard]] bool
verifyDigest(
    PublicKey const& publicKey,
    uint256 const& digest,
    Slice const& sig,
    bool mustBeFullyCanonical = true) noexcept;
 
[[nodiscard]] bool
verify(
    PublicKey const& publicKey,
    Slice const& m,
    Slice const& sig,
    bool mustBeFullyCanonical = true) noexcept;
 
NodeID
calcNodeID(PublicKey const&);
 
// VFALCO This belongs in AccountID.h but
//        is here because of header issues
AccountID
calcAccountID(PublicKey const& pk);
 
}  // namespace ripple
 
//------------------------------------------------------------------------------
 
namespace Json {
template <>
inline ripple::PublicKey
getOrThrow(Json::Value const& v, ripple::SField const& field)
{
    using namespace ripple;
    std::string const b58 = getOrThrow<std::string>(v, field);
    if (auto pubKeyBlob = strUnHex(b58); publicKeyType(makeSlice(*pubKeyBlob)))
    {
        return PublicKey{makeSlice(*pubKeyBlob)};
    }
    for (auto const tokenType :
         {TokenType::NodePublic, TokenType::AccountPublic})
    {
        if (auto const pk = parseBase58<PublicKey>(tokenType, b58))
            return *pk;
    }
    Throw<JsonTypeMismatchError>(field.getJsonName(), "PublicKey");
}
}  // namespace Json
 
#endif