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 COPYING 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             if (vchSecret.size() != 32)
  75                 return false;
  76             CKey key;
  77             key.SetSecret(vchSecret);
  78             if (key.GetPubKey() == vchPubKey)
  79                 break;
  80             return false;
  81         }
  82         vMasterKey = vMasterKeyIn;
  83     }
  84     return true;
  85 }
  86
  87 bool CCryptoKeyStore::AddKey(const CKey& key)
  88 {
  89     CRITICAL_BLOCK(cs_KeyStore)
  90     {
  91         if (!IsCrypted())
  92             return CBasicKeyStore::AddKey(key);
  93
  94         if (IsLocked())
  95             return false;
  96
  97         std::vector<unsigned char> vchCryptedSecret;
  98         std::vector<unsigned char> vchPubKey = key.GetPubKey();
  99         if (!EncryptSecret(vMasterKey, key.GetSecret(), Hash(vchPubKey.begin(), vchPubKey.end()), vchCryptedSecret))
 100             return false;
 101
 102         if (!AddCryptedKey(key.GetPubKey(), vchCryptedSecret))
 103             return false;
 104     }
 105     return true;
 106 }
 107
 108
 109 bool CCryptoKeyStore::AddCryptedKey(const std::vector<unsigned char> &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret)
 110 {
 111     CRITICAL_BLOCK(cs_KeyStore)
 112     {
 113         if (!SetCrypted())
 114             return false;
 115
 116         mapCryptedKeys[CBitcoinAddress(vchPubKey)] = make_pair(vchPubKey, vchCryptedSecret);
 117     }
 118     return true;
 119 }
 120
 121 bool CCryptoKeyStore::GetKey(const CBitcoinAddress &address, CKey& keyOut) const
 122 {
 123     CRITICAL_BLOCK(cs_KeyStore)
 124     {
 125         if (!IsCrypted())
 126             return CBasicKeyStore::GetKey(address, keyOut);
 127
 128         CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
 129         if (mi != mapCryptedKeys.end())
 130         {
 131             const std::vector<unsigned char> &vchPubKey = (*mi).second.first;
 132             const std::vector<unsigned char> &vchCryptedSecret = (*mi).second.second;
 133             CSecret vchSecret;
 134             if (!DecryptSecret(vMasterKey, vchCryptedSecret, Hash(vchPubKey.begin(), vchPubKey.end()), vchSecret))
 135                 return false;
 136             if (vchSecret.size() != 32)
 137                 return false;
 138             keyOut.SetSecret(vchSecret);
 139             return true;
 140         }
 141     }
 142     return false;
 143 }
 144
 145 bool CCryptoKeyStore::GetPubKey(const CBitcoinAddress &address, std::vector<unsigned char>& vchPubKeyOut) const
 146 {
 147     CRITICAL_BLOCK(cs_KeyStore)
 148     {
 149         if (!IsCrypted())
 150             return CKeyStore::GetPubKey(address, vchPubKeyOut);
 151
 152         CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
 153         if (mi != mapCryptedKeys.end())
 154         {
 155             vchPubKeyOut = (*mi).second.first;
 156             return true;
 157         }
 158     }
 159     return false;
 160 }
 161
 162 bool CCryptoKeyStore::EncryptKeys(CKeyingMaterial& vMasterKeyIn)
 163 {
 164     CRITICAL_BLOCK(cs_KeyStore)
 165     {
 166         if (!mapCryptedKeys.empty() || IsCrypted())
 167             return false;
 168
 169         fUseCrypto = true;
 170         CKey key;
 171         BOOST_FOREACH(KeyMap::value_type& mKey, mapKeys)
 172         {
 173             if (!key.SetSecret(mKey.second))
 174                 return false;
 175             const std::vector<unsigned char> vchPubKey = key.GetPubKey();
 176             std::vector<unsigned char> vchCryptedSecret;
 177             if (!EncryptSecret(vMasterKeyIn, key.GetSecret(), Hash(vchPubKey.begin(), vchPubKey.end()), vchCryptedSecret))
 178                 return false;
 179             if (!AddCryptedKey(vchPubKey, vchCryptedSecret))
 180                 return false;
 181         }
 182         mapKeys.clear();
 183     }
 184     return true;
 185 }