src/keystore.cpp

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2011 The Bitcoin developers
   3 // Distributed under the MIT/X11 software license, see the accompanying
   4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #include "headers.h"
   7 #include "db.h"
   8 #include "crypter.h"
   9
  10 std::vector<unsigned char> CKeyStore::GenerateNewKey()
  11 {
  12     RandAddSeedPerfmon();
  13     CKey key;
  14     key.MakeNewKey();
  15     if (!AddKey(key))
  16         throw std::runtime_error("CKeyStore::GenerateNewKey() : AddKey failed");
  17     return key.GetPubKey();
  18 }
  19
  20 bool CKeyStore::GetPubKey(const CBitcoinAddress &address, std::vector<unsigned char> &vchPubKeyOut) const
  21 {
  22     CKey key;
  23     if (!GetKey(address, key))
  24         return false;
  25     vchPubKeyOut = key.GetPubKey();
  26     return true;
  27 }
  28
  29 bool CBasicKeyStore::AddKey(const CKey& key)
  30 {
  31     CRITICAL_BLOCK(cs_KeyStore)
  32         mapKeys[key.GetAddress()] = key.GetSecret();
  33     return true;
  34 }
  35
  36 bool CCryptoKeyStore::SetCrypted()
  37 {
  38     CRITICAL_BLOCK(cs_KeyStore)
  39     {
  40         if (fUseCrypto)
  41             return true;
  42         if (!mapKeys.empty())
  43             return false;
  44         fUseCrypto = true;
  45     }
  46     return true;
  47 }
  48
  49 std::vector<unsigned char> CCryptoKeyStore::GenerateNewKey()
  50 {
  51     RandAddSeedPerfmon();
  52     CKey key;
  53     key.MakeNewKey();
  54     if (!AddKey(key))
  55         throw std::runtime_error("CCryptoKeyStore::GenerateNewKey() : AddKey failed");
  56     return key.GetPubKey();
  57 }
  58
  59 bool CCryptoKeyStore::Unlock(const CKeyingMaterial& vMasterKeyIn)
  60 {
  61     CRITICAL_BLOCK(cs_KeyStore)
  62     {
  63         if (!SetCrypted())
  64             return false;
  65
  66         CryptedKeyMap::const_iterator mi = mapCryptedKeys.begin();
  67         for (; mi != mapCryptedKeys.end(); ++mi)
  68         {
  69             const std::vector<unsigned char> &vchPubKey = (*mi).second.first;
  70             const std::vector<unsigned char> &vchCryptedSecret = (*mi).second.second;
  71             CSecret vchSecret;
  72             if(!DecryptSecret(vMasterKeyIn, vchCryptedSecret, Hash(vchPubKey.begin(), vchPubKey.end()), vchSecret))
  73                 return false;
  74             CKey key;
  75             key.SetSecret(vchSecret);
  76             if (key.GetPubKey() == vchPubKey)
  77                 break;
  78             return false;
  79         }
  80         vMasterKey = vMasterKeyIn;
  81     }
  82     return true;
  83 }
  84
  85 bool CCryptoKeyStore::AddKey(const CKey& key)
  86 {
  87     CRITICAL_BLOCK(cs_KeyStore)
  88     {
  89         if (!IsCrypted())
  90             return CBasicKeyStore::AddKey(key);
  91
  92         if (IsLocked())
  93             return false;
  94
  95         std::vector<unsigned char> vchCryptedSecret;
  96         std::vector<unsigned char> vchPubKey = key.GetPubKey();
  97         if (!EncryptSecret(vMasterKey, key.GetSecret(), Hash(vchPubKey.begin(), vchPubKey.end()), vchCryptedSecret))
  98             return false;
  99
 100         if (!AddCryptedKey(key.GetPubKey(), vchCryptedSecret))
 101             return false;
 102     }
 103     return true;
 104 }
 105
 106
 107 bool CCryptoKeyStore::AddCryptedKey(const std::vector<unsigned char> &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret)
 108 {
 109     CRITICAL_BLOCK(cs_KeyStore)
 110     {
 111         if (!SetCrypted())
 112             return false;
 113
 114         mapCryptedKeys[CBitcoinAddress(vchPubKey)] = make_pair(vchPubKey, vchCryptedSecret);
 115     }
 116     return true;
 117 }
 118
 119 bool CCryptoKeyStore::GetKey(const CBitcoinAddress &address, CKey& keyOut) const
 120 {
 121     CRITICAL_BLOCK(cs_KeyStore)
 122     {
 123         if (!IsCrypted())
 124             return CBasicKeyStore::GetKey(address, keyOut);
 125
 126         CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
 127         if (mi != mapCryptedKeys.end())
 128         {
 129             const std::vector<unsigned char> &vchPubKey = (*mi).second.first;
 130             const std::vector<unsigned char> &vchCryptedSecret = (*mi).second.second;
 131             CSecret vchSecret;
 132             if (!DecryptSecret(vMasterKey, vchCryptedSecret, Hash(vchPubKey.begin(), vchPubKey.end()), vchSecret))
 133                 return false;
 134             keyOut.SetSecret(vchSecret);
 135             return true;
 136         }
 137     }
 138     return false;
 139 }
 140
 141 bool CCryptoKeyStore::GetPubKey(const CBitcoinAddress &address, std::vector<unsigned char>& vchPubKeyOut) const
 142 {
 143     CRITICAL_BLOCK(cs_KeyStore)
 144     {
 145         if (!IsCrypted())
 146             return CKeyStore::GetPubKey(address, vchPubKeyOut);
 147
 148         CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
 149         if (mi != mapCryptedKeys.end())
 150         {
 151             vchPubKeyOut = (*mi).second.first;
 152             return true;
 153         }
 154     }
 155     return false;
 156 }
 157
 158 bool CCryptoKeyStore::EncryptKeys(CKeyingMaterial& vMasterKeyIn)
 159 {
 160     CRITICAL_BLOCK(cs_KeyStore)
 161     {
 162         if (!mapCryptedKeys.empty() || IsCrypted())
 163             return false;
 164
 165         fUseCrypto = true;
 166         CKey key;
 167         BOOST_FOREACH(KeyMap::value_type& mKey, mapKeys)
 168         {
 169             if (!key.SetSecret(mKey.second))
 170                 return false;
 171             const std::vector<unsigned char> vchPubKey = key.GetPubKey();
 172             std::vector<unsigned char> vchCryptedSecret;
 173             if (!EncryptSecret(vMasterKeyIn, key.GetSecret(), Hash(vchPubKey.begin(), vchPubKey.end()), vchCryptedSecret))
 174                 return false;
 175             if (!AddCryptedKey(vchPubKey, vchCryptedSecret))
 176                 return false;
 177         }
 178         mapKeys.clear();
 179     }
 180     return true;
 181 }