diff options
Diffstat (limited to 'src/wallet')
| -rw-r--r-- | src/wallet/wallet.cpp | 78 | ||||
| -rw-r--r-- | src/wallet/wallet.h | 1 |
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) |