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fix(wallet): increment wallet key manager index during recovery (#2973)
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222 changes: 222 additions & 0 deletions
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base_layer/wallet/src/output_manager_service/master_key_manager.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,222 @@ | ||
| // Copyright 2021. The Tari Project | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without modification, are permitted provided that the | ||
| // following conditions are met: | ||
| // | ||
| // 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following | ||
| // disclaimer. | ||
| // | ||
| // 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the | ||
| // following disclaimer in the documentation and/or other materials provided with the distribution. | ||
| // | ||
| // 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote | ||
| // products derived from this software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, | ||
| // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | ||
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | ||
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | ||
| // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | ||
| // USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
|
|
||
| use crate::{ | ||
| output_manager_service::{ | ||
| error::OutputManagerError, | ||
| handle::PublicRewindKeys, | ||
| storage::database::{KeyManagerState, OutputManagerBackend, OutputManagerDatabase}, | ||
| }, | ||
| types::KeyDigest, | ||
| }; | ||
| use futures::lock::Mutex; | ||
| use log::*; | ||
| use tari_core::transactions::{ | ||
| transaction_protocol::RewindData, | ||
| types::{PrivateKey, PublicKey}, | ||
| }; | ||
| use tari_crypto::{keys::PublicKey as PublicKeyTrait, range_proof::REWIND_USER_MESSAGE_LENGTH}; | ||
| use tari_key_manager::{ | ||
| key_manager::KeyManager, | ||
| mnemonic::{from_secret_key, MnemonicLanguage}, | ||
| }; | ||
|
|
||
| const LOG_TARGET: &str = "wallet::output_manager_service::master_key_manager"; | ||
|
|
||
| const KEY_MANAGER_COINBASE_BRANCH_KEY: &str = "coinbase"; | ||
| const KEY_MANAGER_COINBASE_SCRIPT_BRANCH_KEY: &str = "coinbase_script"; | ||
| const KEY_MANAGER_SCRIPT_BRANCH_KEY: &str = "script"; | ||
| const KEY_MANAGER_RECOVERY_VIEWONLY_BRANCH_KEY: &str = "recovery_viewonly"; | ||
| const KEY_MANAGER_RECOVERY_BLINDING_BRANCH_KEY: &str = "recovery_blinding"; | ||
| const KEY_MANAGER_MAX_SEARCH_DEPTH: u64 = 1_000_000; | ||
|
|
||
| pub(crate) struct MasterKeyManager<TBackend> | ||
| where TBackend: OutputManagerBackend + 'static | ||
| { | ||
| utxo_key_manager: Mutex<KeyManager<PrivateKey, KeyDigest>>, | ||
| utxo_script_key_manager: Mutex<KeyManager<PrivateKey, KeyDigest>>, | ||
| coinbase_key_manager: Mutex<KeyManager<PrivateKey, KeyDigest>>, | ||
| coinbase_script_key_manager: Mutex<KeyManager<PrivateKey, KeyDigest>>, | ||
| rewind_data: RewindData, | ||
| db: OutputManagerDatabase<TBackend>, | ||
| } | ||
|
|
||
| impl<TBackend> MasterKeyManager<TBackend> | ||
| where TBackend: OutputManagerBackend + 'static | ||
| { | ||
| pub async fn new( | ||
| master_secret_key: PrivateKey, | ||
| db: OutputManagerDatabase<TBackend>, | ||
| ) -> Result<Self, OutputManagerError> { | ||
| // Check to see if there is any persisted state. If there is confirm that the provided master secret key matches | ||
| let key_manager_state = match db.get_key_manager_state().await? { | ||
| None => { | ||
| let starting_state = KeyManagerState { | ||
| master_key: master_secret_key, | ||
| branch_seed: "".to_string(), | ||
| primary_key_index: 0, | ||
| }; | ||
| db.set_key_manager_state(starting_state.clone()).await?; | ||
| starting_state | ||
| }, | ||
| Some(km) => { | ||
| if km.master_key != master_secret_key { | ||
| return Err(OutputManagerError::MasterSecretKeyMismatch); | ||
| } | ||
| km | ||
| }, | ||
| }; | ||
|
|
||
| let utxo_key_manager = KeyManager::<PrivateKey, KeyDigest>::from( | ||
| key_manager_state.master_key.clone(), | ||
| key_manager_state.branch_seed, | ||
| key_manager_state.primary_key_index, | ||
| ); | ||
|
|
||
| let utxo_script_key_manager = KeyManager::<PrivateKey, KeyDigest>::from( | ||
| key_manager_state.master_key.clone(), | ||
| KEY_MANAGER_SCRIPT_BRANCH_KEY.to_string(), | ||
| key_manager_state.primary_key_index, | ||
| ); | ||
|
|
||
| let coinbase_key_manager = KeyManager::<PrivateKey, KeyDigest>::from( | ||
| key_manager_state.master_key.clone(), | ||
| KEY_MANAGER_COINBASE_BRANCH_KEY.to_string(), | ||
| 0, | ||
| ); | ||
|
|
||
| let coinbase_script_key_manager = KeyManager::<PrivateKey, KeyDigest>::from( | ||
| key_manager_state.master_key.clone(), | ||
| KEY_MANAGER_COINBASE_SCRIPT_BRANCH_KEY.to_string(), | ||
| 0, | ||
| ); | ||
|
|
||
| let rewind_key_manager = KeyManager::<PrivateKey, KeyDigest>::from( | ||
| key_manager_state.master_key.clone(), | ||
| KEY_MANAGER_RECOVERY_VIEWONLY_BRANCH_KEY.to_string(), | ||
| 0, | ||
| ); | ||
| let rewind_key = rewind_key_manager.derive_key(0)?.k; | ||
|
|
||
| let rewind_blinding_key_manager = KeyManager::<PrivateKey, KeyDigest>::from( | ||
| key_manager_state.master_key, | ||
| KEY_MANAGER_RECOVERY_BLINDING_BRANCH_KEY.to_string(), | ||
| 0, | ||
| ); | ||
| let rewind_blinding_key = rewind_blinding_key_manager.derive_key(0)?.k; | ||
|
|
||
| let rewind_data = RewindData { | ||
| rewind_key, | ||
| rewind_blinding_key, | ||
| proof_message: [0u8; REWIND_USER_MESSAGE_LENGTH], | ||
| }; | ||
|
|
||
| Ok(Self { | ||
| utxo_key_manager: Mutex::new(utxo_key_manager), | ||
| utxo_script_key_manager: Mutex::new(utxo_script_key_manager), | ||
| coinbase_key_manager: Mutex::new(coinbase_key_manager), | ||
| coinbase_script_key_manager: Mutex::new(coinbase_script_key_manager), | ||
| rewind_data, | ||
| db, | ||
| }) | ||
| } | ||
|
|
||
| pub fn rewind_data(&self) -> &RewindData { | ||
| &self.rewind_data | ||
| } | ||
|
|
||
| /// Return the next pair of (spending_key, script_private_key) from the key managers. These will always be generated | ||
| /// in tandem and at corresponding increments | ||
| pub async fn get_next_spend_and_script_key(&self) -> Result<(PrivateKey, PrivateKey), OutputManagerError> { | ||
| let mut km = self.utxo_key_manager.lock().await; | ||
| let key = km.next_key()?; | ||
|
|
||
| let mut skm = self.utxo_script_key_manager.lock().await; | ||
| let script_key = skm.next_key()?; | ||
|
|
||
| self.db.increment_key_index().await?; | ||
| Ok((key.k, script_key.k)) | ||
| } | ||
|
|
||
| pub async fn get_script_key_at_index(&self, index: u64) -> Result<PrivateKey, OutputManagerError> { | ||
| let skm = self.utxo_script_key_manager.lock().await; | ||
| let script_key = skm.derive_key(index)?; | ||
| Ok(script_key.k) | ||
| } | ||
|
|
||
| pub async fn get_coinbase_spend_and_script_key_for_height( | ||
| &self, | ||
| height: u64, | ||
| ) -> Result<(PrivateKey, PrivateKey), OutputManagerError> { | ||
| let km = self.coinbase_key_manager.lock().await; | ||
| let spending_key = km.derive_key(height)?; | ||
|
|
||
| let mut skm = self.coinbase_script_key_manager.lock().await; | ||
| let script_key = skm.next_key()?; | ||
| Ok((spending_key.k, script_key.k)) | ||
| } | ||
|
|
||
| /// Return the Seed words for the current Master Key set in the Key Manager | ||
| pub async fn get_seed_words(&self, language: &MnemonicLanguage) -> Result<Vec<String>, OutputManagerError> { | ||
| Ok(from_secret_key( | ||
| self.utxo_key_manager.lock().await.master_key(), | ||
| language, | ||
| )?) | ||
| } | ||
|
|
||
| /// Return the public rewind keys | ||
| pub fn get_rewind_public_keys(&self) -> PublicRewindKeys { | ||
| PublicRewindKeys { | ||
| rewind_public_key: PublicKey::from_secret_key(&self.rewind_data.rewind_key), | ||
| rewind_blinding_public_key: PublicKey::from_secret_key(&self.rewind_data.rewind_blinding_key), | ||
| } | ||
| } | ||
|
|
||
| /// Search the current key manager key chain to find the index of the specified key. | ||
| pub async fn find_utxo_key_index(&self, key: PrivateKey) -> Result<u64, OutputManagerError> { | ||
| let utxo_key_manager = self.utxo_key_manager.lock().await; | ||
| let current_index = (*utxo_key_manager).key_index(); | ||
|
|
||
| for i in 0u64..current_index + KEY_MANAGER_MAX_SEARCH_DEPTH { | ||
| if (*utxo_key_manager).derive_key(i)?.k == key { | ||
| trace!(target: LOG_TARGET, "Key found in Key Chain at index {}", i); | ||
| return Ok(i); | ||
| } | ||
| } | ||
|
|
||
| Err(OutputManagerError::KeyNotFoundInKeyChain) | ||
| } | ||
|
|
||
| /// If the supplied index is higher than the current UTXO key chain indices then they will be updated. | ||
| pub async fn update_current_index_if_higher(&self, index: u64) -> Result<(), OutputManagerError> { | ||
| let mut utxo_key_manager = self.utxo_key_manager.lock().await; | ||
| let mut utxo_script_key_manager = self.utxo_script_key_manager.lock().await; | ||
| let current_index = (*utxo_key_manager).key_index(); | ||
| if index > current_index { | ||
| (*utxo_key_manager).update_key_index(index); | ||
| (*utxo_script_key_manager).update_key_index(index); | ||
| self.db.set_key_index(index).await?; | ||
| trace!(target: LOG_TARGET, "Updated UTXO Key Index to {}", index); | ||
| } | ||
| Ok(()) | ||
| } | ||
| } |
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