diff options
| -rw-r--r-- | src/wallet/scriptpubkeyman.cpp | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/wallet/scriptpubkeyman.cpp b/src/wallet/scriptpubkeyman.cpp index bba31dfe0b..3391d56b15 100644 --- a/src/wallet/scriptpubkeyman.cpp +++ b/src/wallet/scriptpubkeyman.cpp @@ -1084,6 +1084,13 @@ CPubKey LegacyScriptPubKeyMan::GenerateNewKey(WalletBatch &batch, CHDChain& hd_c return pubkey; } +//! Try to derive an extended key, throw if it fails. +static void DeriveExtKey(CExtKey& key_in, unsigned int index, CExtKey& key_out) { + if (!key_in.Derive(key_out, index)) { + throw std::runtime_error("Could not derive extended key"); + } +} + void LegacyScriptPubKeyMan::DeriveNewChildKey(WalletBatch &batch, CKeyMetadata& metadata, CKey& secret, CHDChain& hd_chain, bool internal) { // for now we use a fixed keypath scheme of m/0'/0'/k @@ -1101,11 +1108,11 @@ void LegacyScriptPubKeyMan::DeriveNewChildKey(WalletBatch &batch, CKeyMetadata& // derive m/0' // use hardened derivation (child keys >= 0x80000000 are hardened after bip32) - masterKey.Derive(accountKey, BIP32_HARDENED_KEY_LIMIT); + DeriveExtKey(masterKey, BIP32_HARDENED_KEY_LIMIT, accountKey); // derive m/0'/0' (external chain) OR m/0'/1' (internal chain) assert(internal ? m_storage.CanSupportFeature(FEATURE_HD_SPLIT) : true); - accountKey.Derive(chainChildKey, BIP32_HARDENED_KEY_LIMIT+(internal ? 1 : 0)); + DeriveExtKey(accountKey, BIP32_HARDENED_KEY_LIMIT+(internal ? 1 : 0), chainChildKey); // derive child key at next index, skip keys already known to the wallet do { @@ -1113,7 +1120,7 @@ void LegacyScriptPubKeyMan::DeriveNewChildKey(WalletBatch &batch, CKeyMetadata& // childIndex | BIP32_HARDENED_KEY_LIMIT = derive childIndex in hardened child-index-range // example: 1 | BIP32_HARDENED_KEY_LIMIT == 0x80000001 == 2147483649 if (internal) { - chainChildKey.Derive(childKey, hd_chain.nInternalChainCounter | BIP32_HARDENED_KEY_LIMIT); + DeriveExtKey(chainChildKey, hd_chain.nInternalChainCounter | BIP32_HARDENED_KEY_LIMIT, childKey); metadata.hdKeypath = "m/0'/1'/" + ToString(hd_chain.nInternalChainCounter) + "'"; metadata.key_origin.path.push_back(0 | BIP32_HARDENED_KEY_LIMIT); metadata.key_origin.path.push_back(1 | BIP32_HARDENED_KEY_LIMIT); @@ -1121,7 +1128,7 @@ void LegacyScriptPubKeyMan::DeriveNewChildKey(WalletBatch &batch, CKeyMetadata& hd_chain.nInternalChainCounter++; } else { - chainChildKey.Derive(childKey, hd_chain.nExternalChainCounter | BIP32_HARDENED_KEY_LIMIT); + DeriveExtKey(chainChildKey, hd_chain.nExternalChainCounter | BIP32_HARDENED_KEY_LIMIT, childKey); metadata.hdKeypath = "m/0'/0'/" + ToString(hd_chain.nExternalChainCounter) + "'"; metadata.key_origin.path.push_back(0 | BIP32_HARDENED_KEY_LIMIT); metadata.key_origin.path.push_back(0 | BIP32_HARDENED_KEY_LIMIT); |