Refactor keytime/metadata and wallet encryption bugfix

Refactor keytime:
* Key metadata is kept in a CWallet::mapKeyMetadata (std::map<CKeyId,CKeyMetadata>).
* When generating a new key, time is put in that map, and new key is written.
* AddKeyPubKey and AddCryptedKey do not take a creation time argument, but instead
  pull it from that map, if it exists there.

Bugfix:
* AddKeyPubKey and AddCryptedKey in CWallet didn't override the CKeyStore
  definition anymore. This is fixed, as they no longed need the nCreationTime
  argument now.

Also a few related other changes:
* Metadata can be overwritten.
* Only GenerateNewKey calls GetTime(), as it's the only place where we know for
  sure a key was not constructed earlier.
* When the nTimeFirstKey is known to be inaccurate, it is set to the value 1
  (instead of 0, which would mean unknown).
* Use CPubKey instead of std::vector<unsigned char> where possible.

1 files changed, 5 insertions, 3 deletions

diff --git a/src/wallet.h b/src/wallet.h
index 2b3131261c..48bd511971 100644
--- a/src/wallet.h
+++ b/src/wallet.h
@@ -87,7 +87,7 @@ public:
     std::string strWalletFile;
 
     std::set<int64> setKeyPool;
-
+    std::map<CKeyID, CKeyMetadata> mapKeyMetadata;
 
     typedef std::map<unsigned int, CMasterKey> MasterKeyMap;
     MasterKeyMap mapMasterKeys;
@@ -140,14 +140,16 @@ public:
     // Generate a new key
     CPubKey GenerateNewKey();
     // Adds a key to the store, and saves it to disk.
-    bool AddKeyPubKey(const CKey& key, const CPubKey &pubkey, int64 nCreateTime = 0);
+    bool AddKeyPubKey(const CKey& key, const CPubKey &pubkey);
     // Adds a key to the store, without saving it to disk (used by LoadWallet)
     bool LoadKey(const CKey& key, const CPubKey &pubkey) { return CCryptoKeyStore::AddKeyPubKey(key, pubkey); }
+    // Load metadata (used by LoadWallet)
+    bool LoadKeyMetadata(const CPubKey &pubkey, const CKeyMetadata &metadata);
 
     bool LoadMinVersion(int nVersion) { nWalletVersion = nVersion; nWalletMaxVersion = std::max(nWalletMaxVersion, nVersion); return true; }
 
     // Adds an encrypted key to the store, and saves it to disk.
-    bool AddCryptedKey(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret, int64 nCreateTime = 0);
+    bool AddCryptedKey(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret);
     // Adds an encrypted key to the store, without saving it to disk (used by LoadWallet)
     bool LoadCryptedKey(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret);
     bool AddCScript(const CScript& redeemScript);