Add GetSecret() and GetKeys() to CKeyStore

[novacoin.git] / src / keystore.h

diff --git a/src/keystore.h b/src/keystore.h
index 6080d7d..3b91de6 100644 (file)
--- a/src/keystore.h
+++ b/src/keystore.h
@@ -1,30 +1,177 @@
-// Copyright (c) 2009-2011 Satoshi Nakamoto & Bitcoin developers
+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Copyright (c) 2011 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"
+
+// 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 
+    {
+        CSecret vchSecret;
+        if (!GetSecret(address, vchSecret))
+            return false;
+        if (!keyOut.SetSecret(vchSecret))
+            return false;
+        return true;
+    }
+    virtual void GetKeys(std::set<CBitcoinAddress> &setAddress) const =0;
+    virtual bool GetPubKey(const CBitcoinAddress &address, std::vector<unsigned char>& vchPubKeyOut) const;
+
+    // Generate a new key, and add it to the store
+    virtual std::vector<unsigned char> GenerateNewKey();
+    virtual bool GetSecret(const CBitcoinAddress &address, CSecret& vchSecret) const
+    {
+        CKey key;
+        if (!GetKey(address, key))
+            return false;
+        vchSecret = key.GetSecret();
+        return true;
+    }
+};
+
+typedef std::map<CBitcoinAddress, CSecret> KeyMap;
+
+// Basic key store, that keeps keys in an address->secret map
+class CBasicKeyStore : public CKeyStore
+{
+protected:
+    KeyMap mapKeys;
+
 public:
-    std::map<std::vector<unsigned char>, CPrivKey> mapKeys;
-    mutable CCriticalSection cs_mapKeys;
-    virtual bool AddKey(const CKey& key);
-    bool HaveKey(const std::vector<unsigned char> &vchPubKey) const
+    bool AddKey(const CKey& key);
+    bool HaveKey(const CBitcoinAddress &address) const
     {
-        return (mapKeys.count(vchPubKey) > 0);
+        bool result;
+        CRITICAL_BLOCK(cs_KeyStore)
+            result = (mapKeys.count(address) > 0);
+        return result;
     }
-    bool GetPrivKey(const std::vector<unsigned char> &vchPubKey, CPrivKey& keyOut) const
+    void GetKeys(std::set<CBitcoinAddress> &setAddress) const
     {
-        std::map<std::vector<unsigned char>, CPrivKey>::const_iterator mi = mapKeys.find(vchPubKey);
-        if (mi != mapKeys.end())
+        setAddress.clear();
+        CRITICAL_BLOCK(cs_KeyStore)
         {
-            keyOut = (*mi).second;
-            return true;
+            KeyMap::const_iterator mi = mapKeys.begin();
+            while (mi != mapKeys.end())
+            {
+                setAddress.insert((*mi).first);
+                mi++;
+            }
+        }
+    }
+    bool GetSecret(const CBitcoinAddress &address, CSecret &vchSecret) const
+    {
+        CRITICAL_BLOCK(cs_KeyStore)
+        {
+            KeyMap::const_iterator mi = mapKeys.find(address);
+            if (mi != mapKeys.end())
+            {
+                vchSecret = (*mi).second;
+                return true;
+            }
         }
         return false;
     }
+};
+
+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);
     std::vector<unsigned char> GenerateNewKey();
+    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 GetSecret(const CBitcoinAddress &address, CSecret& vchSecret) 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