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// Copyright (c) 2009-2011 Satoshi Nakamoto & 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
typedef std::vector<unsigned char, secure_allocator<unsigned char> > CMasterKey;
class CKeyStore
{
public:
mutable CCriticalSection cs_KeyStore;
virtual bool AddKey(const CKey& key) =0;
virtual bool HaveKey(const std::vector<unsigned char> &vchPubKey) const =0;
virtual bool GetPrivKey(const std::vector<unsigned char> &vchPubKey, CPrivKey& keyOut) const =0;
virtual std::vector<unsigned char> GenerateNewKey();
};
class CBasicKeyStore : public CKeyStore
{
protected:
std::map<std::vector<unsigned char>, CPrivKey> mapKeys;
public:
bool AddKey(const CKey& key);
bool HaveKey(const std::vector<unsigned char> &vchPubKey) const
{
return (mapKeys.count(vchPubKey) > 0);
}
bool GetPrivKey(const std::vector<unsigned char> &vchPubKey, CPrivKey& keyOut) const
{
std::map<std::vector<unsigned char>, CPrivKey>::const_iterator mi = mapKeys.find(vchPubKey);
if (mi != mapKeys.end())
{
keyOut = (*mi).second;
return true;
}
return false;
}
};
class CCryptoKeyStore : public CBasicKeyStore
{
private:
std::map<std::vector<unsigned char>, std::vector<unsigned char> > mapCryptedKeys;
CMasterKey vMasterKey;
// if fUseCrypto is true, mapKeys must be empty
// if fUseCrypto is false, vMasterKey must be empty
bool fUseCrypto;
protected:
bool IsCrypted() const
{
return fUseCrypto;
}
bool SetCrypted()
{
if (fUseCrypto)
return true;
if (!mapKeys.empty())
return false;
fUseCrypto = true;
}
// will encrypt previously unencrypted keys
bool GenerateMasterKey();
bool GetMasterKey(CMasterKey &vMasterKeyOut) const
{
if (!IsCrypted())
return false;
if (IsLocked())
return false;
vMasterKeyOut = vMasterKey;
return true;
}
bool Unlock(const CMasterKey& vMasterKeyIn);
public:
CCryptoKeyStore() : fUseCrypto(false)
{
}
bool IsLocked() const
{
if (!IsCrypted())
return false;
return vMasterKey.empty();
}
bool Lock()
{
if (!SetCrypted())
return false;
vMasterKey.clear();
}
virtual bool AddCryptedKey(const std::vector<unsigned char> &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret);
bool AddKey(const CKey& key);
bool HaveKey(const std::vector<unsigned char> &vchPubKey) const
{
if (!IsCrypted())
return CBasicKeyStore::HaveKey(vchPubKey);
return mapCryptedKeys.count(vchPubKey) > 0;
}
bool GetPrivKey(const std::vector<unsigned char> &vchPubKey, CPrivKey& keyOut) const;
};
#endif
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