tencryption of bip32 master private keys - electrum - Electrum Bitcoin wallet
HTML git clone https://git.parazyd.org/electrum
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DIR Files
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---
DIR commit 58538ba825c199b4f3286cc3d7f3b3d2a33473e3
DIR parent a3de537d9b0f8a936b0d90ab1a7cb0acc1b18e39
HTML Author: ThomasV <thomasv@gitorious>
Date: Mon, 5 Aug 2013 13:53:50 +0200
encryption of bip32 master private keys
Diffstat:
M lib/account.py | 33 +++++++++++++++++--------------
M lib/wallet.py | 73 +++++++++++++++++++------------
2 files changed, 63 insertions(+), 43 deletions(-)
---
DIR diff --git a/lib/account.py b/lib/account.py
t@@ -1,18 +1,21 @@
-"""
-todolist:
- * passwords, private keys storage
- * multisig service
- * compatibility with old addresses for restore
- * gui
-
- an account may use one or several MPKs.
- due to the type 1 derivations, we need to pass the mpk to this function
- None : all accounts
- -1 : imported
- 0,1... : seeded sequences
-
- each account has a public and private master key
-"""
+#!/usr/bin/env python
+#
+# Electrum - lightweight Bitcoin client
+# Copyright (C) 2013 thomasv@gitorious
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
from bitcoin import *
DIR diff --git a/lib/wallet.py b/lib/wallet.py
t@@ -195,7 +195,7 @@ class Wallet:
self.create_new_account('Main account')
- def create_new_account(self, name):
+ def create_new_account(self, name, password):
keys = self.accounts.keys()
i = 0
t@@ -205,9 +205,9 @@ class Wallet:
i += 1
start = "m/0'/"
+ master_k = self.get_master_private_key(start, password )
master_c, master_K, master_cK = self.master_public_keys[start]
- master_k = self.master_private_keys[start] # needs decryption
- k, c, K, cK = bip32_private_derivation(master_k, master_c, start, derivation) # this is a type 1 derivation
+ k, c, K, cK = bip32_private_derivation(master_k, master_c, start, derivation)
self.accounts[derivation] = BIP32_Account({ 'name':name, 'c':c, 'K':K, 'cK':cK })
self.save_accounts()
t@@ -269,6 +269,17 @@ class Wallet:
raise
return self.config.get("master_public_key")
+ def get_master_private_key(self, account, password):
+ master_k = pw_decode( self.master_private_keys[account], password)
+ master_c, master_K, master_Kc = self.master_public_keys[account]
+ try:
+ K, Kc = get_pubkeys_from_secret(master_k.decode('hex'))
+ assert K.encode('hex') == master_K
+ except:
+ raise BaseException("Invalid password")
+ return master_k
+
+
def get_address_index(self, address):
if address in self.imported_keys.keys():
return -1, None
t@@ -291,8 +302,29 @@ class Wallet:
#todo: #self.sequences[0].check_seed(seed)
return seed
+
def get_private_key(self, address, password):
- return self.get_private_keys([address], password).get(address)
+ if address in self.imported_keys.keys():
+ return pw_decode( self.imported_keys[address], password )
+ else:
+ account, sequence = self.get_address_index(address)
+ m = re.match("m/0'/(\d+)'", account)
+ if m:
+ num = int(m.group(1))
+ master_k = self.get_master_private_key("m/0'/", password)
+ master_c, _, _ = self.master_public_keys["m/0'/"]
+ master_k, master_c = CKD(master_k, master_c, num + BIP32_PRIME)
+ return self.accounts[account].get_private_key(sequence, master_k)
+
+ m2 = re.match("m/1'/(\d+) & m/2'/(\d+)", account)
+ if m2:
+ num = int(m2.group(1))
+ master_k = self.get_master_private_key("m/1'/", password)
+ master_c, master_K, _ = self.master_public_keys["m/1'/"]
+ master_k, master_c = CKD(master_k.decode('hex'), master_c.decode('hex'), num)
+ return self.accounts[account].get_private_key(sequence, master_k)
+ return
+
def get_private_keys(self, addresses, password):
if not self.seed: return {}
t@@ -300,29 +332,8 @@ class Wallet:
seed = self.decode_seed(password)
out = {}
for address in addresses:
- if address in self.imported_keys.keys():
- out[address] = pw_decode( self.imported_keys[address], password )
- else:
- account, sequence = self.get_address_index(address)
- print_error( "found index", address, account, sequence)
-
- m = re.match("m/0'/(\d+)'", account)
- if m:
- num = int(m.group(1))
- master_k = self.master_private_keys["m/0'/"]
- master_c, _, _ = self.master_public_keys["m/0'/"]
- master_k, master_c = CKD(master_k, master_c, num + BIP32_PRIME)
- pk = self.accounts[account].get_private_key(sequence, master_k)
- out[address] = pk
-
- m2 = re.match("m/1'/(\d+) & m/2'/(\d+)", account)
- if m2:
- num = int(m2.group(1))
- master_k = self.master_private_keys["m/1'/"]
- master_c, master_K, _ = self.master_public_keys["m/1'/"]
- master_k, master_c = CKD(master_k.decode('hex'), master_c.decode('hex'), num)
- pk = self.accounts[account].get_private_key(sequence, master_k)
- out[address] = pk
+ pk = self.get_private_key(address, password)
+ if pk: out[address] = pk
return out
t@@ -724,7 +735,7 @@ class Wallet:
if not self.use_change or account == -1:
change_addr = inputs[-1]['address']
else:
- change_addr = self.accounts[account][1][-self.gap_limit_for_change]
+ change_addr = self.accounts[account].get_addresses(1)[-self.gap_limit_for_change]
# Insert the change output at a random position in the outputs
posn = random.randint(0, len(outputs))
t@@ -949,6 +960,12 @@ class Wallet:
self.imported_keys[k] = c
self.config.set_key('imported_keys', self.imported_keys, True)
+ for k, v in self.master_private_keys.items():
+ b = pw_decode(v, old_password)
+ c = pw_encode(b, new_password)
+ self.master_private_keys[k] = c
+ self.config.set_key('master_private_keys', self.master_private_keys, True)
+
def freeze(self,addr):
if self.is_mine(addr) and addr not in self.frozen_addresses: