Merge pull request #4996

d0c4197 change exit(1) to an assert in CWallet::EncryptWallet (Philip Kaufmann)
870da77 fix possible memory leaks in CWallet::EncryptWallet (Philip Kaufmann)
f606bb9 fix a possible memory leak in CWalletDB::Recover (Philip Kaufmann)

src/wallet.cpp

@@ -15,6 +15,8 @@
 #include "util.h"
 #include "utilmoneystr.h"
 
+#include <assert.h>
+
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/thread.hpp>
 
@@ -426,17 +428,25 @@ bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
         mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
         if (fFileBacked)
         {
+            assert(!pwalletdbEncryption);
             pwalletdbEncryption = new CWalletDB(strWalletFile);
-            if (!pwalletdbEncryption->TxnBegin())
+            if (!pwalletdbEncryption->TxnBegin()) {
+                delete pwalletdbEncryption;
+                pwalletdbEncryption = NULL;
                 return false;
+            }
             pwalletdbEncryption->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
         }
 
         if (!EncryptKeys(vMasterKey))
         {
-            if (fFileBacked)
+            if (fFileBacked) {
                 pwalletdbEncryption->TxnAbort();
-            exit(1); //We now probably have half of our keys encrypted in memory, and half not...die and let the user reload their unencrypted wallet.
+                delete pwalletdbEncryption;
+            }
+            // We now probably have half of our keys encrypted in memory, and half not...
+            // die and let the user reload their unencrypted wallet.
+            assert(false);
         }
 
         // Encryption was introduced in version 0.4.0
@@ -444,8 +454,12 @@ bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
 
         if (fFileBacked)
         {
-            if (!pwalletdbEncryption->TxnCommit())
-                exit(1); //We now have keys encrypted in memory, but no on disk...die to avoid confusion and let the user reload their unencrypted wallet.
+            if (!pwalletdbEncryption->TxnCommit()) {
+                delete pwalletdbEncryption;
+                // We now have keys encrypted in memory, but no on disk...
+                // die to avoid confusion and let the user reload their unencrypted wallet.
+                assert(false);
+            }
 
             delete pwalletdbEncryption;
             pwalletdbEncryption = NULL;
@@ -1068,7 +1082,7 @@ CAmount CWallet::GetWatchOnlyBalance() const
                 nTotal += pcoin->GetAvailableWatchOnlyCredit();
         }
     }
-    
+
     return nTotal;
 }
 

src/wallet.h

@@ -143,6 +143,7 @@ public:
     {
         SetNull();
     }
+
     CWallet(std::string strWalletFileIn)
     {
         SetNull();
@@ -150,6 +151,13 @@ public:
         strWalletFile = strWalletFileIn;
         fFileBacked = true;
     }
+
+    ~CWallet()
+    {
+        delete pwalletdbEncryption;
+        pwalletdbEncryption = NULL;
+    }
+
     void SetNull()
     {
         nWalletVersion = FEATURE_BASE;

src/walletdb.cpp

@@ -15,11 +15,11 @@
 
 #include <boost/filesystem.hpp>
 #include <boost/foreach.hpp>
+#include <boost/scoped_ptr.hpp>
 #include <boost/thread.hpp>
 
-using namespace std;
 using namespace boost;
-
+using namespace std;
 
 static uint64_t nAccountingEntryNumber = 0;
 
@@ -918,7 +918,7 @@ bool CWalletDB::Recover(CDBEnv& dbenv, std::string filename, bool fOnlyKeys)
     LogPrintf("Salvage(aggressive) found %u records\n", salvagedData.size());
 
     bool fSuccess = allOK;
-    Db* pdbCopy = new Db(&dbenv.dbenv, 0);
+    boost::scoped_ptr<Db> pdbCopy(new Db(&dbenv.dbenv, 0));
     int ret = pdbCopy->open(NULL,               // Txn pointer
                             filename.c_str(),   // Filename
                             "main",             // Logical db name
@@ -959,7 +959,6 @@ bool CWalletDB::Recover(CDBEnv& dbenv, std::string filename, bool fOnlyKeys)
     }
     ptxn->commit(0);
     pdbCopy->close(0);
-    delete pdbCopy;
 
     return fSuccess;
 }