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Avoid reading the old hd master key during wallet encryption

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This makes SetHDMasterKey responsible for maintinaing the CHDChain
version instead of always creating it with the latest version and
making EncryptWallet responsible for keeping the version from
changing.
This commit is contained in:
Matt Corallo 2017-03-29 12:33:13 -04:00
parent f34cdcbd80
commit 185c7f08be
2 changed files with 8 additions and 13 deletions
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14
src/wallet/wallet.cpp
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@ -637,13 +637,10 @@ bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
// if we are using HD, replace the HD master key (seed) with a new one
if (IsHDEnabled()) {
CKey key;
CPubKey masterPubKey = GenerateNewHDMasterKey();
// preserve the old chains version to not break backward compatibility
CHDChain oldChain = GetHDChain();
if (!SetHDMasterKey(masterPubKey, &oldChain))
if (!SetHDMasterKey(GenerateNewHDMasterKey())) {
return false;
}
}
NewKeyPool();
Lock();
@ -1308,17 +1305,14 @@ CPubKey CWallet::GenerateNewHDMasterKey()
return pubkey;
}
bool CWallet::SetHDMasterKey(const CPubKey& pubkey, CHDChain *possibleOldChain)
bool CWallet::SetHDMasterKey(const CPubKey& pubkey)
{
LOCK(cs_wallet);
// store the keyid (hash160) together with
// the child index counter in the database
// as a hdchain object
CHDChain newHdChain;
if (possibleOldChain) {
// preserve the old chains version
newHdChain.nVersion = possibleOldChain->nVersion;
}
newHdChain.nVersion = CanSupportFeature(FEATURE_HD_SPLIT) ? CHDChain::VERSION_HD_CHAIN_SPLIT : CHDChain::VERSION_HD_BASE;
newHdChain.masterKeyID = pubkey.GetID();
SetHDChain(newHdChain, false);

7
src/wallet/wallet.h
View file

@ -1056,9 +1056,10 @@ public:
CPubKey GenerateNewHDMasterKey();
/* Set the current HD master key (will reset the chain child index counters)
If possibleOldChain is provided, the parameters from the old chain (version)
will be preserved. */
bool SetHDMasterKey(const CPubKey& key, CHDChain *possibleOldChain = nullptr);
Sets the master key's version based on the current wallet version (so the
caller must ensure the current wallet version is correct before calling
this function). */
bool SetHDMasterKey(const CPubKey& key);
};
/** A key allocated from the key pool. */