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Avoid reading the old hd master key during wallet encryption #10115

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Merged
merged 1 commit into from
May 3, 2017
Merged

Avoid reading the old hd master key during wallet encryption #10115

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14 changes: 4 additions & 10 deletions src/wallet/wallet.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -637,12 +637,9 @@ 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();
Expand Down Expand Up @@ -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);

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7 changes: 4 additions & 3 deletions src/wallet/wallet.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1056,9 +1056,10 @@ class CWallet : public CCryptoKeyStore, public CValidationInterface
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. */
Expand Down