Obsolete keypool and make sure database removes log files on shutdown.

6 files changed, 89 insertions, 36 deletions

diff --git a/src/bitcoinrpc.cpp b/src/bitcoinrpc.cpp
index 24864030c1..31ef725d79 100644
--- a/src/bitcoinrpc.cpp
+++ b/src/bitcoinrpc.cpp
@@ -1557,6 +1557,11 @@ Value encryptwallet(const Array& params, bool fHelp)
     if (pwalletMain->IsCrypted())
         throw JSONRPCError(-15, "Error: running with an encrypted wallet, but encryptwallet was called.");
 
+#ifdef QT_GUI
+    // shutting down via RPC while the GUI is running does not work (yet):
+    throw runtime_error("Not Yet Implemented: use GUI to encrypt wallet, not RPC command");
+#endif
+
     string strWalletPass;
     strWalletPass.reserve(100);
     mlock(&strWalletPass[0], strWalletPass.capacity());
@@ -1576,7 +1581,11 @@ Value encryptwallet(const Array& params, bool fHelp)
     fill(strWalletPass.begin(), strWalletPass.end(), '\0');
     munlock(&strWalletPass[0], strWalletPass.capacity());
 
-    return Value::null;
+    // BDB seems to have a bad habit of writing old data into
+    // slack space in .dat files; that is bad if the old data is
+    // unencrypted private keys.  So:
+    CreateThread(Shutdown, NULL);
+    return "wallet encrypted; bitcoin server stopping, restart to run with encrypted wallet";
 }
 
 
diff --git a/src/db.cpp b/src/db.cpp
index f083c77736..f163ac949a 100644
--- a/src/db.cpp
+++ b/src/db.cpp
@@ -28,6 +28,34 @@ DbEnv dbenv(0);
 static map<string, int> mapFileUseCount;
 static map<string, Db*> mapDb;
 
+static void EnvShutdown(bool fRemoveLogFiles)
+{
+    if (!fDbEnvInit)
+        return;
+
+    fDbEnvInit = false;
+    dbenv.close(0);
+    DbEnv(0).remove(GetDataDir().c_str(), 0);
+
+    if (fRemoveLogFiles)
+    {
+        filesystem::path datadir(GetDataDir());
+        filesystem::directory_iterator it(datadir / "database");
+        while (it != filesystem::directory_iterator())
+        {
+            const filesystem::path& p = it->path();
+#if BOOST_FILESYSTEM_VERSION == 2
+            std::string f = p.filename();
+#else
+            std::string f = p.filename().generic_string();
+#endif
+            if (f.find("log.") == 0)
+                filesystem::remove(p);
+            ++it;
+        }
+    }
+}
+
 class CDBInit
 {
 public:
@@ -36,11 +64,7 @@ public:
     }
     ~CDBInit()
     {
-        if (fDbEnvInit)
-        {
-            dbenv.close(0);
-            fDbEnvInit = false;
-        }
+        EnvShutdown(false);
     }
 }
 instance_of_cdbinit;
@@ -165,7 +189,7 @@ void static CloseDb(const string& strFile)
     }
 }
 
-bool Resilver(const string& strFile)
+bool CDB::Rewrite(const string& strFile, const char* pszSkip)
 {
     while (!fShutdown)
     {
@@ -180,8 +204,8 @@ bool Resilver(const string& strFile)
                 mapFileUseCount.erase(strFile);
 
                 bool fSuccess = true;
-                printf("Resilvering %s...\n", strFile.c_str());
-                string strFileRes = strFile + ".resilver";
+                printf("Rewriting %s...\n", strFile.c_str());
+                string strFileRes = strFile + ".rewrite";
                 CDB db(strFile.c_str(), "r");
                 Db* pdbCopy = new Db(&dbenv, 0);
 
@@ -212,6 +236,15 @@ bool Resilver(const string& strFile)
                             fSuccess = false;
                             break;
                         }
+                        if (pszSkip &&
+                            strncmp(&ssKey[0], pszSkip, std::min(ssKey.size(), strlen(pszSkip))) == 0)
+                            continue;
+                        if (strncmp(&ssKey[0], "\x07version", 8) == 0)
+                        {
+                            // Update version:
+                            ssValue.clear();
+                            ssValue << VERSION;
+                        }
                         Dbt datKey(&ssKey[0], ssKey.size());
                         Dbt datValue(&ssValue[0], ssValue.size());
                         int ret2 = pdbCopy->put(NULL, &datKey, &datValue, DB_NOOVERWRITE);
@@ -239,7 +272,7 @@ bool Resilver(const string& strFile)
                         fSuccess = false;
                 }
                 if (!fSuccess)
-                    printf("Resilvering of %s FAILED!\n", strFileRes.c_str());
+                    printf("Rewriting of %s FAILED!\n", strFileRes.c_str());
                 return fSuccess;
             }
         }
@@ -249,7 +282,7 @@ bool Resilver(const string& strFile)
 }
 
 
-void DBFlush(bool fShutdown)
+void DBFlush(bool fShutdown, bool fRemoveLogFiles)
 {
     // Flush log data to the actual data file
     //  on all files that are not in use
@@ -280,9 +313,10 @@ void DBFlush(bool fShutdown)
         {
             char** listp;
             if (mapFileUseCount.empty())
+            {
                 dbenv.log_archive(&listp, DB_ARCH_REMOVE);
-            dbenv.close(0);
-            fDbEnvInit = false;
+                EnvShutdown(fRemoveLogFiles);
+            }
         }
     }
 }
@@ -740,7 +774,6 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
     pwallet->vchDefaultKey.clear();
     int nFileVersion = 0;
     vector<uint256> vWalletUpgrade;
-    bool fIsResilvered = false;
     bool fIsEncrypted = false;
 
     // Modify defaults
@@ -901,7 +934,6 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
                 if (strKey == "fMinimizeOnClose")   ssValue >> fMinimizeOnClose;
                 if (strKey == "fUseProxy")          ssValue >> fUseProxy;
                 if (strKey == "addrProxy")          ssValue >> addrProxy;
-                if (strKey == "fIsResilvered")      ssValue >> fIsResilvered;
                 if (fHaveUPnP && strKey == "fUseUPnP")           ssValue >> fUseUPnP;
             }
             else if (strType == "minversion")
@@ -929,8 +961,11 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
         printf("fUseUPnP = %d\n", fUseUPnP);
 
 
-    // Upgrade
-    if (nFileVersion < VERSION)
+    // Rewrite encrypted wallets of versions 0.4.0 and 0.5.0rc:
+    if (fIsEncrypted && (nFileVersion == 40000 || nFileVersion == 50000))
+        return DB_NEED_REWRITE;
+
+    if (nFileVersion < VERSION) // Update
     {
         // Get rid of old debug.log file in current directory
         if (nFileVersion <= 105 && !pszSetDataDir[0])
@@ -939,9 +974,6 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
         WriteVersion(VERSION);
     }
 
-    if (fIsEncrypted && !fIsResilvered)
-        return DB_NEED_RESILVER;
-
     return DB_LOAD_OK;
 }
 
diff --git a/src/db.h b/src/db.h
index 75748ace01..98af4be9a0 100644
--- a/src/db.h
+++ b/src/db.h
@@ -29,10 +29,9 @@ extern unsigned int nWalletDBUpdated;
 extern DbEnv dbenv;
 
 
-extern void DBFlush(bool fShutdown);
+extern void DBFlush(bool fShutdown, bool fRemoveLogFiles);
 void ThreadFlushWalletDB(void* parg);
 bool BackupWallet(const CWallet& wallet, const std::string& strDest);
-extern bool Resilver(const std::string& strFile);
 
 
 
@@ -258,7 +257,7 @@ public:
         return Write(std::string("version"), nVersion);
     }
 
-    friend bool Resilver(const std::string&);
+    bool static Rewrite(const std::string& strFile, const char* pszSkip = NULL);
 };
 
 
@@ -351,7 +350,7 @@ enum DBErrors
     DB_CORRUPT,
     DB_TOO_NEW,
     DB_LOAD_FAIL,
-    DB_NEED_RESILVER
+    DB_NEED_REWRITE
 };
 
 class CWalletDB : public CDB
diff --git a/src/init.cpp b/src/init.cpp
index d6e153285e..c91c098e03 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -44,8 +44,8 @@ void Shutdown(void* parg)
 {
     static CCriticalSection cs_Shutdown;
     static bool fTaken;
-    bool fFirstThread;
-    CRITICAL_BLOCK(cs_Shutdown)
+    bool fFirstThread = false;
+    TRY_CRITICAL_BLOCK(cs_Shutdown)
     {
         fFirstThread = !fTaken;
         fTaken = true;
@@ -55,9 +55,9 @@ void Shutdown(void* parg)
     {
         fShutdown = true;
         nTransactionsUpdated++;
-        DBFlush(false);
+        DBFlush(false, false);
         StopNode();
-        DBFlush(true);
+        DBFlush(true, true);
         boost::filesystem::remove(GetPidFile());
         UnregisterWallet(pwalletMain);
         delete pwalletMain;
@@ -362,6 +362,12 @@ bool AppInit2(int argc, char* argv[])
             strErrors += _("Error loading wallet.dat: Wallet corrupted      \n");
         else if (nLoadWalletRet == DB_TOO_NEW)
             strErrors += _("Error loading wallet.dat: Wallet requires newer version of Bitcoin      \n");
+        else if (nLoadWalletRet == DB_NEED_REWRITE)
+        {
+            strErrors += _("Wallet needed to be rewritten: restart Bitcoin to complete    \n");
+            wxMessageBox(strErrors, "Bitcoin", wxOK | wxICON_ERROR);
+            return false;
+        }
         else
             strErrors += _("Error loading wallet.dat      \n");
     }
diff --git a/src/serialize.h b/src/serialize.h
index beb87f1d04..53867e939a 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -60,7 +60,7 @@ class CDataStream;
 class CAutoFile;
 static const unsigned int MAX_SIZE = 0x02000000;
 
-static const int VERSION = 50000;
+static const int VERSION = 50001;
 static const char* pszSubVer = "";
 static const bool VERSION_IS_BETA = true;
 
diff --git a/src/wallet.cpp b/src/wallet.cpp
index 3ed880f600..e3ca7d297d 100644
--- a/src/wallet.cpp
+++ b/src/wallet.cpp
@@ -187,10 +187,12 @@ bool CWallet::EncryptWallet(const string& strWalletPassphrase)
         }
 
         Lock();
-    }
 
-    if (Resilver(strWalletFile))
-        CWalletDB(strWalletFile, "r+").WriteSetting("fIsResilvered", true);
+        // Need to completely rewrite the wallet file; if we don't, bdb might keep
+        // bits of the unencrypted private key in slack space in the database file.
+        setKeyPool.clear();
+        CDB::Rewrite(strWalletFile, "\x04pool");
+    }
 
     return true;
 }
@@ -1145,11 +1147,16 @@ int CWallet::LoadWallet(bool& fFirstRunRet)
         return false;
     fFirstRunRet = false;
     int nLoadWalletRet = CWalletDB(strWalletFile,"cr+").LoadWallet(this);
-    if (nLoadWalletRet == DB_NEED_RESILVER)
+    if (nLoadWalletRet == DB_NEED_REWRITE)
     {
-        if (Resilver(strWalletFile))
-            CWalletDB(strWalletFile, "r+").WriteSetting("fIsResilvered", true);
-        nLoadWalletRet = DB_LOAD_OK;
+        if (CDB::Rewrite(strWalletFile, "\x04pool"))
+        {
+            setKeyPool.clear();
+            // Note: can't top-up keypool here, because wallet is locked.
+            // User will be prompted to unlock wallet the next operation
+            // the requires a new key.
+        }
+        nLoadWalletRet = DB_NEED_REWRITE;
     }
 
     if (nLoadWalletRet != DB_LOAD_OK)