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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_KEYSTORE_H
#define BITCOIN_KEYSTORE_H
#include "crypter.h"
#include "script.h"
/** A virtual base class for key stores */
class CKeyStore
{
protected:
mutable CCriticalSection cs_KeyStore;
public:
// Add a key to the store.
virtual bool AddKey(const CKey& key) =0;
// Check whether a key corresponding to a given address is present in the store.
virtual bool HaveKey(const CBitcoinAddress &address) const =0;
virtual bool GetKey(const CBitcoinAddress &address, CKey& keyOut) const =0;
virtual void GetKeys(std::set<CBitcoinAddress> &setAddress) const =0;
virtual bool GetPubKey(const CBitcoinAddress &address, std::vector<unsigned char>& vchPubKeyOut) const;
// Support for BIP 0013 : see https://en.bitcoin.it/wiki/BIP_0013
virtual bool AddCScript(const CScript& redeemScript) =0;
virtual bool HaveCScript(const uint160 &hash) const =0;
virtual bool GetCScript(const uint160 &hash, CScript& redeemScriptOut) const =0;
virtual bool GetSecret(const CBitcoinAddress &address, CSecret& vchSecret, bool &fCompressed) const
{
CKey key;
if (!GetKey(address, key))
return false;
vchSecret = key.GetSecret(fCompressed);
return true;
}
};
typedef std::map<CBitcoinAddress, std::pair<CSecret, bool> > KeyMap;
typedef std::map<uint160, CScript > ScriptMap;
/** Basic key store, that keeps keys in an address->secret map */
class CBasicKeyStore : public CKeyStore
{
protected:
KeyMap mapKeys;
ScriptMap mapScripts;
public:
bool AddKey(const CKey& key);
bool HaveKey(const CBitcoinAddress &address) const
{
bool result;
CRITICAL_BLOCK(cs_KeyStore)
result = (mapKeys.count(address) > 0);
return result;
}
void GetKeys(std::set<CBitcoinAddress> &setAddress) const
{
setAddress.clear();
CRITICAL_BLOCK(cs_KeyStore)
{
KeyMap::const_iterator mi = mapKeys.begin();
while (mi != mapKeys.end())
{
setAddress.insert((*mi).first);
mi++;
}
}
}
bool GetKey(const CBitcoinAddress &address, CKey &keyOut) const
{
CRITICAL_BLOCK(cs_KeyStore)
{
KeyMap::const_iterator mi = mapKeys.find(address);
if (mi != mapKeys.end())
{
keyOut.Reset();
keyOut.SetSecret((*mi).second.first, (*mi).second.second);
return true;
}
}
return false;
}
virtual bool AddCScript(const CScript& redeemScript);
virtual bool HaveCScript(const uint160 &hash) const;
virtual bool GetCScript(const uint160 &hash, CScript& redeemScriptOut) const;
};
typedef std::map<CBitcoinAddress, std::pair<std::vector<unsigned char>, std::vector<unsigned char> > > CryptedKeyMap;
/** Keystore which keeps the private keys encrypted.
* It derives from the basic key store, which is used if no encryption is active.
*/
class CCryptoKeyStore : public CBasicKeyStore
{
private:
CryptedKeyMap mapCryptedKeys;
CKeyingMaterial vMasterKey;
// if fUseCrypto is true, mapKeys must be empty
// if fUseCrypto is false, vMasterKey must be empty
bool fUseCrypto;
protected:
bool SetCrypted();
// will encrypt previously unencrypted keys
bool EncryptKeys(CKeyingMaterial& vMasterKeyIn);
bool Unlock(const CKeyingMaterial& vMasterKeyIn);
public:
CCryptoKeyStore() : fUseCrypto(false)
{
}
bool IsCrypted() const
{
return fUseCrypto;
}
bool IsLocked() const
{
if (!IsCrypted())
return false;
bool result;
CRITICAL_BLOCK(cs_KeyStore)
result = vMasterKey.empty();
return result;
}
bool Lock()
{
if (!SetCrypted())
return false;
CRITICAL_BLOCK(cs_KeyStore)
vMasterKey.clear();
return true;
}
virtual bool AddCryptedKey(const std::vector<unsigned char> &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret);
bool AddKey(const CKey& key);
bool HaveKey(const CBitcoinAddress &address) const
{
CRITICAL_BLOCK(cs_KeyStore)
{
if (!IsCrypted())
return CBasicKeyStore::HaveKey(address);
return mapCryptedKeys.count(address) > 0;
}
return false;
}
bool GetKey(const CBitcoinAddress &address, CKey& keyOut) const;
bool GetPubKey(const CBitcoinAddress &address, std::vector<unsigned char>& vchPubKeyOut) const;
void GetKeys(std::set<CBitcoinAddress> &setAddress) const
{
if (!IsCrypted())
{
CBasicKeyStore::GetKeys(setAddress);
return;
}
setAddress.clear();
CryptedKeyMap::const_iterator mi = mapCryptedKeys.begin();
while (mi != mapCryptedKeys.end())
{
setAddress.insert((*mi).first);
mi++;
}
}
};
#endif
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