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-rw-r--r--src/wallet/wallet.cpp78
-rw-r--r--src/wallet/wallet.h1
2 files changed, 42 insertions, 37 deletions
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 43e22383f4..a1f69dd94d 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -100,43 +100,7 @@ CPubKey CWallet::GenerateNewKey()
// use HD key derivation if HD was enabled during wallet creation
if (IsHDEnabled()) {
- // for now we use a fixed keypath scheme of m/0'/0'/k
- CKey key; //master key seed (256bit)
- CExtKey masterKey; //hd master key
- CExtKey accountKey; //key at m/0'
- CExtKey externalChainChildKey; //key at m/0'/0'
- CExtKey childKey; //key at m/0'/0'/<n>'
-
- // try to get the master key
- if (!GetKey(hdChain.masterKeyID, key))
- throw std::runtime_error(std::string(__func__) + ": Master key not found");
-
- masterKey.SetMaster(key.begin(), key.size());
-
- // derive m/0'
- // use hardened derivation (child keys >= 0x80000000 are hardened after bip32)
- masterKey.Derive(accountKey, BIP32_HARDENED_KEY_LIMIT);
-
- // derive m/0'/0'
- accountKey.Derive(externalChainChildKey, BIP32_HARDENED_KEY_LIMIT);
-
- // derive child key at next index, skip keys already known to the wallet
- do
- {
- // always derive hardened keys
- // childIndex | BIP32_HARDENED_KEY_LIMIT = derive childIndex in hardened child-index-range
- // example: 1 | BIP32_HARDENED_KEY_LIMIT == 0x80000001 == 2147483649
- externalChainChildKey.Derive(childKey, hdChain.nExternalChainCounter | BIP32_HARDENED_KEY_LIMIT);
- metadata.hdKeypath = "m/0'/0'/"+std::to_string(hdChain.nExternalChainCounter)+"'";
- metadata.hdMasterKeyID = hdChain.masterKeyID;
- // increment childkey index
- hdChain.nExternalChainCounter++;
- } while(HaveKey(childKey.key.GetPubKey().GetID()));
- secret = childKey.key;
-
- // update the chain model in the database
- if (!CWalletDB(strWalletFile).WriteHDChain(hdChain))
- throw std::runtime_error(std::string(__func__) + ": Writing HD chain model failed");
+ DeriveNewChildKey(metadata, secret);
} else {
secret.MakeNewKey(fCompressed);
}
@@ -157,6 +121,46 @@ CPubKey CWallet::GenerateNewKey()
return pubkey;
}
+void CWallet::DeriveNewChildKey(CKeyMetadata& metadata, CKey& secret)
+{
+ // for now we use a fixed keypath scheme of m/0'/0'/k
+ CKey key; //master key seed (256bit)
+ CExtKey masterKey; //hd master key
+ CExtKey accountKey; //key at m/0'
+ CExtKey externalChainChildKey; //key at m/0'/0'
+ CExtKey childKey; //key at m/0'/0'/<n>'
+
+ // try to get the master key
+ if (!GetKey(hdChain.masterKeyID, key))
+ throw std::runtime_error(std::string(__func__) + ": Master key not found");
+
+ masterKey.SetMaster(key.begin(), key.size());
+
+ // derive m/0'
+ // use hardened derivation (child keys >= 0x80000000 are hardened after bip32)
+ masterKey.Derive(accountKey, BIP32_HARDENED_KEY_LIMIT);
+
+ // derive m/0'/0'
+ accountKey.Derive(externalChainChildKey, BIP32_HARDENED_KEY_LIMIT);
+
+ // derive child key at next index, skip keys already known to the wallet
+ do {
+ // always derive hardened keys
+ // childIndex | BIP32_HARDENED_KEY_LIMIT = derive childIndex in hardened child-index-range
+ // example: 1 | BIP32_HARDENED_KEY_LIMIT == 0x80000001 == 2147483649
+ externalChainChildKey.Derive(childKey, hdChain.nExternalChainCounter | BIP32_HARDENED_KEY_LIMIT);
+ metadata.hdKeypath = "m/0'/0'/" + std::to_string(hdChain.nExternalChainCounter) + "'";
+ metadata.hdMasterKeyID = hdChain.masterKeyID;
+ // increment childkey index
+ hdChain.nExternalChainCounter++;
+ } while (HaveKey(childKey.key.GetPubKey().GetID()));
+ secret = childKey.key;
+
+ // update the chain model in the database
+ if (!CWalletDB(strWalletFile).WriteHDChain(hdChain))
+ throw std::runtime_error(std::string(__func__) + ": Writing HD chain model failed");
+}
+
bool CWallet::AddKeyPubKey(const CKey& secret, const CPubKey &pubkey)
{
AssertLockHeld(cs_wallet); // mapKeyMetadata
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index c700e0ca7c..077edcab2d 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -698,6 +698,7 @@ public:
* Generate a new key
*/
CPubKey GenerateNewKey();
+ void DeriveNewChildKey(CKeyMetadata& metadata, CKey& secret);
//! Adds a key to the store, and saves it to disk.
bool AddKeyPubKey(const CKey& key, const CPubKey &pubkey);
//! Adds a key to the store, without saving it to disk (used by LoadWallet)