triangles_v5/src/keystore.cpp

// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "keystore.h"
#include "script.h"

bool CKeyStore::GetPubKey(const CKeyID &address, CPubKey &vchPubKeyOut) const
{
    CKey key;
    if (!GetKey(address, key))
        return false;
    vchPubKeyOut = key.GetPubKey();
    return true;
}

bool CBasicKeyStore::AddKey(const CKey& key)
{
    bool fCompressed = false;
    CSecret secret = key.GetSecret(fCompressed);
    {
        LOCK(cs_KeyStore);
        mapKeys[key.GetPubKey().GetID()] = make_pair(secret, fCompressed);
    }
    return true;
}

bool CBasicKeyStore::AddCScript(const CScript& redeemScript)
{
    {
        LOCK(cs_KeyStore);
        mapScripts[redeemScript.GetID()] = redeemScript;
    }
    return true;
}

bool CBasicKeyStore::HaveCScript(const CScriptID& hash) const
{
    bool result;
    {
        LOCK(cs_KeyStore);
        result = (mapScripts.count(hash) > 0);
    }
    return result;
}


bool CBasicKeyStore::GetCScript(const CScriptID &hash, CScript& redeemScriptOut) const
{
    {
        LOCK(cs_KeyStore);
        if (auto mi = mapScripts.find(hash); mi != mapScripts.end())
        {
            redeemScriptOut = mi->second;
            return true;
        }
    }
    return false;
}

bool CCryptoKeyStore::SetCrypted()
{
    {
        LOCK(cs_KeyStore);
        if (fUseCrypto)
            return true;
        if (!mapKeys.empty())
            return false;
        fUseCrypto = true;
    }
    return true;
}

bool CCryptoKeyStore::LockKeyStore()
{
    if (!SetCrypted())
        return false;

    {
        LOCK(cs_KeyStore);
        vMasterKey.clear();
    }

    NotifyStatusChanged(this);
    return true;
}

bool CCryptoKeyStore::Unlock(const CKeyingMaterial& vMasterKeyIn)
{
    {
        LOCK(cs_KeyStore);
        if (!SetCrypted())
            return false;

        for (const auto& [pubKeyHash, val] : mapCryptedKeys)
        {
            const CPubKey &vchPubKey = val.first;
            const std::vector<unsigned char> &vchCryptedSecret = val.second;
            CSecret vchSecret;
            if(!DecryptSecret(vMasterKeyIn, vchCryptedSecret, vchPubKey.GetHash(), vchSecret))
                return false;
            if (vchSecret.size() != 32)
                return false;
            CKey decryptedKey;
            decryptedKey.SetPubKey(vchPubKey);
            decryptedKey.SetSecret(vchSecret);
            if (decryptedKey.GetPubKey() == vchPubKey)
                break;
            return false;
        }
        vMasterKey = vMasterKeyIn;
    }
    NotifyStatusChanged(this);
    return true;
}

bool CCryptoKeyStore::AddKey(const CKey& key)
{
    {
        LOCK(cs_KeyStore);
        if (!IsCrypted())
            return CBasicKeyStore::AddKey(key);

        if (IsLocked())
            return false;

        std::vector<unsigned char> vchCryptedSecret;
        CPubKey vchPubKey = key.GetPubKey();
        bool fCompressed;
        if (!EncryptSecret(vMasterKey, key.GetSecret(fCompressed), vchPubKey.GetHash(), vchCryptedSecret))
            return false;

        if (!AddCryptedKey(key.GetPubKey(), vchCryptedSecret))
            return false;
    }
    return true;
}


bool CCryptoKeyStore::AddCryptedKey(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret)
{
    {
        LOCK(cs_KeyStore);
        if (!SetCrypted())
            return false;

        mapCryptedKeys[vchPubKey.GetID()] = make_pair(vchPubKey, vchCryptedSecret);
    }
    return true;
}

bool CCryptoKeyStore::GetKey(const CKeyID &address, CKey& keyOut) const
{
    {
        LOCK(cs_KeyStore);
        if (!IsCrypted())
            return CBasicKeyStore::GetKey(address, keyOut);

        if (auto mi = mapCryptedKeys.find(address); mi != mapCryptedKeys.end())
        {
            const CPubKey &vchPubKey = mi->second.first;
            const std::vector<unsigned char> &vchCryptedSecret = mi->second.second;
            CSecret vchSecret;
            if (!DecryptSecret(vMasterKey, vchCryptedSecret, vchPubKey.GetHash(), vchSecret))
                return false;
            if (vchSecret.size() != 32)
                return false;
            keyOut.SetPubKey(vchPubKey);
            keyOut.SetSecret(vchSecret);
            return true;
        }
    }
    return false;
}

bool CCryptoKeyStore::GetPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const
{
    {
        LOCK(cs_KeyStore);
        if (!IsCrypted())
            return CKeyStore::GetPubKey(address, vchPubKeyOut);

        if (auto mi = mapCryptedKeys.find(address); mi != mapCryptedKeys.end())
        {
            vchPubKeyOut = mi->second.first;
            return true;
        }
    }
    return false;
}

bool CCryptoKeyStore::PrepareKeyEncryption(CKeyingMaterial& vMasterKeyIn,
                                           CryptedKeyMap& cryptedKeysOut) const
{
    LOCK(cs_KeyStore);
    if (!mapCryptedKeys.empty() || IsCrypted())
        return false;

    cryptedKeysOut.clear();
    for (const KeyMap::value_type& mKey : mapKeys)
    {
        CKey key;
        if (!key.SetSecret(mKey.second.first, mKey.second.second))
            return false;
        const CPubKey vchPubKey = key.GetPubKey();
        std::vector<unsigned char> vchCryptedSecret;
        bool fCompressed;
        if (!EncryptSecret(vMasterKeyIn, key.GetSecret(fCompressed),
                           vchPubKey.GetHash(), vchCryptedSecret))
            return false;
        if (!cryptedKeysOut.emplace(vchPubKey.GetID(),
                                    std::make_pair(vchPubKey,
                                                   std::move(vchCryptedSecret))).second)
            return false;
    }
    return cryptedKeysOut.size() == mapKeys.size();
}

bool CCryptoKeyStore::CommitKeyEncryption(CryptedKeyMap&& cryptedKeys)
{
    LOCK(cs_KeyStore);
    if (!mapCryptedKeys.empty() || IsCrypted() || cryptedKeys.size() != mapKeys.size())
        return false;

    mapCryptedKeys = std::move(cryptedKeys);
    mapKeys.clear();
    fUseCrypto = true;
    return true;
}

bool CCryptoKeyStore::EncryptKeys(CKeyingMaterial& vMasterKeyIn)
{
    CryptedKeyMap cryptedKeys;
    if (!PrepareKeyEncryption(vMasterKeyIn, cryptedKeys))
        return false;
    return CommitKeyEncryption(std::move(cryptedKeys));
}