3 # Electrum - lightweight Bitcoin client
4 # Copyright (C) 2011 thomasv@gitorious
6 # This program is free software: you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation, either version 3 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 import sys, base64, os, re, hashlib, copy, operator, ast, threading, random
22 from ecdsa.util import string_to_number, number_to_string
24 ############ functions from pywallet #####################
28 def hash_160(public_key):
30 md = hashlib.new('ripemd160')
31 md.update(hashlib.sha256(public_key).digest())
35 md = ripemd.new(hashlib.sha256(public_key).digest())
39 def public_key_to_bc_address(public_key):
40 h160 = hash_160(public_key)
41 return hash_160_to_bc_address(h160)
43 def hash_160_to_bc_address(h160):
44 vh160 = chr(addrtype) + h160
47 return b58encode(addr)
49 def bc_address_to_hash_160(addr):
50 bytes = b58decode(addr, 25)
53 __b58chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
54 __b58base = len(__b58chars)
57 """ encode v, which is a string of bytes, to base58.
61 for (i, c) in enumerate(v[::-1]):
62 long_value += (256**i) * ord(c)
65 while long_value >= __b58base:
66 div, mod = divmod(long_value, __b58base)
67 result = __b58chars[mod] + result
69 result = __b58chars[long_value] + result
71 # Bitcoin does a little leading-zero-compression:
72 # leading 0-bytes in the input become leading-1s
75 if c == '\0': nPad += 1
78 return (__b58chars[0]*nPad) + result
80 def b58decode(v, length):
81 """ decode v into a string of len bytes
84 for (i, c) in enumerate(v[::-1]):
85 long_value += __b58chars.find(c) * (__b58base**i)
88 while long_value >= 256:
89 div, mod = divmod(long_value, 256)
90 result = chr(mod) + result
92 result = chr(long_value) + result
96 if c == __b58chars[0]: nPad += 1
99 result = chr(0)*nPad + result
100 if length is not None and len(result) != length:
107 return hashlib.sha256(hashlib.sha256(data).digest()).digest()
109 def EncodeBase58Check(vchIn):
111 return b58encode(vchIn + hash[0:4])
113 def DecodeBase58Check(psz):
114 vchRet = b58decode(psz, None)
124 def PrivKeyToSecret(privkey):
125 return privkey[9:9+32]
127 def SecretToASecret(secret):
128 vchIn = chr(addrtype+128) + secret
129 return EncodeBase58Check(vchIn)
131 def ASecretToSecret(key):
132 vch = DecodeBase58Check(key)
133 if vch and vch[0] == chr(addrtype+128):
138 ########### end pywallet functions #######################
141 _ud = re.compile('%([0-9a-hA-H]{2})', re.MULTILINE)
142 urldecode = lambda x: _ud.sub(lambda m: chr(int(m.group(1), 16)), x)
145 def int_to_hex(i, length=1):
146 s = hex(i)[2:].rstrip('L')
147 s = "0"*(2*length - len(s)) + s
148 return s.decode('hex')[::-1].encode('hex')
152 EncodeAES = lambda secret, s: base64.b64encode(aes.encryptData(secret,s))
153 DecodeAES = lambda secret, e: aes.decryptData(secret, base64.b64decode(e))
157 # secp256k1, http://www.oid-info.com/get/1.3.132.0.10
158 _p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2FL
159 _r = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141L
160 _b = 0x0000000000000000000000000000000000000000000000000000000000000007L
161 _a = 0x0000000000000000000000000000000000000000000000000000000000000000L
162 _Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798L
163 _Gy = 0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8L
164 curve_secp256k1 = ecdsa.ellipticcurve.CurveFp( _p, _a, _b )
165 generator_secp256k1 = ecdsa.ellipticcurve.Point( curve_secp256k1, _Gx, _Gy, _r )
166 oid_secp256k1 = (1,3,132,0,10)
167 SECP256k1 = ecdsa.curves.Curve("SECP256k1", curve_secp256k1, generator_secp256k1, oid_secp256k1 )
171 out = re.sub('( [^\n]*|)\n','',s)
172 out = out.replace(' ','')
173 out = out.replace('\n','')
176 def raw_tx( inputs, outputs, for_sig = None ):
177 s = int_to_hex(1,4) + ' version\n'
178 s += int_to_hex( len(inputs) ) + ' number of inputs\n'
179 for i in range(len(inputs)):
180 _, _, p_hash, p_index, p_script, pubkey, sig = inputs[i]
181 s += p_hash.decode('hex')[::-1].encode('hex') + ' prev hash\n'
182 s += int_to_hex(p_index,4) + ' prev index\n'
184 sig = sig + chr(1) # hashtype
185 script = int_to_hex( len(sig)) + ' push %d bytes\n'%len(sig)
186 script += sig.encode('hex') + ' sig\n'
187 pubkey = chr(4) + pubkey
188 script += int_to_hex( len(pubkey)) + ' push %d bytes\n'%len(pubkey)
189 script += pubkey.encode('hex') + ' pubkey\n'
191 script = p_script + ' scriptsig \n'
194 s += int_to_hex( len(filter(script))/2 ) + ' script length \n'
196 s += "ffffffff" + ' sequence\n'
197 s += int_to_hex( len(outputs) ) + ' number of outputs\n'
198 for output in outputs:
199 addr, amount = output
200 s += int_to_hex( amount, 8) + ' amount: %d\n'%amount
201 script = '76a9' # op_dup, op_hash_160
202 script += '14' # push 0x14 bytes
203 script += bc_address_to_hash_160(addr).encode('hex')
204 script += '88ac' # op_equalverify, op_checksig
205 s += int_to_hex( len(filter(script))/2 ) + ' script length \n'
206 s += script + ' script \n'
207 s += int_to_hex(0,4) # lock time
208 if for_sig is not None: s += int_to_hex(1, 4) # hash type
214 def format_satoshis(x, is_diff=False, num_zeros = 0):
215 from decimal import Decimal
216 s = str( Decimal(x) /100000000 )
219 if not '.' in s: s += '.'
221 s += "0"*( 1 + num_zeros - ( len(s) - p ))
222 s += " "*( 9 - ( len(s) - p ))
223 s = " "*( 5 - ( p )) + s
227 from version import ELECTRUM_VERSION, SEED_VERSION
228 from interface import DEFAULT_SERVERS
234 def __init__(self, gui_callback = lambda: None):
236 self.electrum_version = ELECTRUM_VERSION
237 self.seed_version = SEED_VERSION
238 self.gui_callback = gui_callback
240 self.gap_limit = 5 # configuration
243 self.master_public_key = ''
246 self.use_encryption = False
247 self.addresses = [] # receiving addresses visible for user
248 self.change_addresses = [] # addresses used as change
249 self.seed = '' # encrypted
251 self.labels = {} # labels for addresses and transactions
252 self.aliases = {} # aliases for addresses
253 self.authorities = {} # trusted addresses
254 self.frozen_addresses = []
256 self.receipts = {} # signed URIs
257 self.receipt = None # next receipt
258 self.addressbook = [] # outgoing addresses, for payments
263 self.imported_keys = {}
264 self.remote_url = None
266 self.was_updated = True
270 # there is a difference between self.up_to_date and self.is_up_to_date()
271 # self.is_up_to_date() returns true when all requests have been answered and processed
272 # self.up_to_date is true when the wallet is synchronized (stronger requirement)
273 self.up_to_date_event = threading.Event()
274 self.up_to_date_event.clear()
275 self.up_to_date = False
276 self.lock = threading.Lock()
277 self.tx_event = threading.Event()
279 self.pick_random_server()
283 def pick_random_server(self):
284 self.server = random.choice( DEFAULT_SERVERS ) # random choice when the wallet is created
286 def is_up_to_date(self):
287 return self.interface.responses.empty() and not self.interface.unanswered_requests
289 def set_server(self, server):
290 # raise an error if the format isnt correct
291 a,b,c = server.split(':')
293 assert c in ['t','h','n']
295 if server != self.server:
298 self.interface.is_connected = False # this exits the polling loop
299 self.interface.poke()
301 def set_path(self, wallet_path):
303 if wallet_path is not None:
304 self.path = wallet_path
306 # backward compatibility: look for wallet file in the default data directory
307 if "HOME" in os.environ:
308 wallet_dir = os.path.join( os.environ["HOME"], '.electrum')
309 elif "LOCALAPPDATA" in os.environ:
310 wallet_dir = os.path.join( os.environ["LOCALAPPDATA"], 'Electrum' )
311 elif "APPDATA" in os.environ:
312 wallet_dir = os.path.join( os.environ["APPDATA"], 'Electrum' )
314 raise BaseException("No home directory found in environment variables.")
316 if not os.path.exists( wallet_dir ): os.mkdir( wallet_dir )
317 self.path = os.path.join( wallet_dir, 'electrum.dat' )
319 def import_key(self, keypair, password):
320 address, key = keypair.split(':')
321 if not self.is_valid(address): return False
322 if address in self.all_addresses(): return False
323 b = ASecretToSecret( key )
324 if not b: return False
325 secexp = int( b.encode('hex'), 16)
326 private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve=SECP256k1 )
328 public_key = private_key.get_verifying_key()
329 if not address == public_key_to_bc_address( '04'.decode('hex') + public_key.to_string() ): return False
330 self.imported_keys[address] = self.pw_encode( key, password )
333 def new_seed(self, password):
334 seed = "%032x"%ecdsa.util.randrange( pow(2,128) )
337 self.seed = self.pw_encode( seed, password )
340 def init_mpk(self,seed):
343 secexp = self.stretch_key(seed)
344 master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
345 self.master_public_key = master_private_key.get_verifying_key().to_string()
347 def all_addresses(self):
348 return self.addresses + self.change_addresses + self.imported_keys.keys()
350 def is_mine(self, address):
351 return address in self.all_addresses()
353 def is_change(self, address):
354 return address in self.change_addresses
356 def is_valid(self,addr):
357 ADDRESS_RE = re.compile('[1-9A-HJ-NP-Za-km-z]{26,}\\Z')
358 if not ADDRESS_RE.match(addr): return False
360 h = bc_address_to_hash_160(addr)
363 return addr == hash_160_to_bc_address(h)
365 def stretch_key(self,seed):
367 for i in range(100000):
368 seed = hashlib.sha256(seed + oldseed).digest()
369 return string_to_number( seed )
371 def get_sequence(self,n,for_change):
372 return string_to_number( Hash( "%d:%d:"%(n,for_change) + self.master_public_key ) )
374 def get_private_key_base58(self, address, password):
375 pk = self.get_private_key(address, password)
376 if pk is None: return None
377 return SecretToASecret( pk )
379 def get_private_key(self, address, password):
380 """ Privatekey(type,n) = Master_private_key + H(n|S|type) """
381 order = generator_secp256k1.order()
383 if address in self.imported_keys.keys():
384 b = self.pw_decode( self.imported_keys[address], password )
385 b = ASecretToSecret( b )
386 secexp = int( b.encode('hex'), 16)
388 if address in self.addresses:
389 n = self.addresses.index(address)
391 elif address in self.change_addresses:
392 n = self.change_addresses.index(address)
395 raise BaseException("unknown address")
396 if not self.seed: return None
398 seed = self.pw_decode( self.seed, password)
400 raise BaseException("Invalid password")
401 secexp = self.stretch_key(seed)
402 secexp = ( secexp + self.get_sequence(n,for_change) ) % order
404 pk = number_to_string(secexp,order)
407 def msg_magic(self, message):
408 return "\x18Bitcoin Signed Message:\n" + chr( len(message) ) + message
410 def sign_message(self, address, message, password):
411 private_key = ecdsa.SigningKey.from_string( self.get_private_key(address, password), curve = SECP256k1 )
412 public_key = private_key.get_verifying_key()
413 signature = private_key.sign_digest( Hash( self.msg_magic( message ) ), sigencode = ecdsa.util.sigencode_string )
414 assert public_key.verify_digest( signature, Hash( self.msg_magic( message ) ), sigdecode = ecdsa.util.sigdecode_string)
416 sig = base64.b64encode( chr(27+i) + signature )
418 self.verify_message( address, sig, message)
423 raise BaseException("error: cannot sign message")
426 def verify_message(self, address, signature, message):
427 """ See http://www.secg.org/download/aid-780/sec1-v2.pdf for the math """
428 from ecdsa import numbertheory, ellipticcurve, util
430 curve = curve_secp256k1
431 G = generator_secp256k1
433 # extract r,s from signature
434 sig = base64.b64decode(signature)
435 if len(sig) != 65: raise BaseException("Wrong encoding")
436 r,s = util.sigdecode_string(sig[1:], order)
437 recid = ord(sig[0]) - 27
439 x = r + (recid/2) * order
441 alpha = ( x * x * x + curve.a() * x + curve.b() ) % curve.p()
442 beta = msqr.modular_sqrt(alpha, curve.p())
443 y = beta if (beta - recid) % 2 == 0 else curve.p() - beta
444 # 1.4 the constructor checks that nR is at infinity
445 R = ellipticcurve.Point(curve, x, y, order)
446 # 1.5 compute e from message:
447 h = Hash( self.msg_magic( message ) )
448 e = string_to_number(h)
450 # 1.6 compute Q = r^-1 (sR - eG)
451 inv_r = numbertheory.inverse_mod(r,order)
452 Q = inv_r * ( s * R + minus_e * G )
453 public_key = ecdsa.VerifyingKey.from_public_point( Q, curve = SECP256k1 )
454 # check that Q is the public key
455 public_key.verify_digest( sig[1:], h, sigdecode = ecdsa.util.sigdecode_string)
456 # check that we get the original signing address
457 addr = public_key_to_bc_address( '04'.decode('hex') + public_key.to_string() )
460 print "bad signature"
461 raise BaseException("Bad signature")
464 def create_new_address(self, for_change):
465 """ Publickey(type,n) = Master_public_key + H(n|S|type)*point """
467 n = len(self.change_addresses) if for_change else len(self.addresses)
468 z = self.get_sequence(n,for_change)
469 master_public_key = ecdsa.VerifyingKey.from_string( self.master_public_key, curve = SECP256k1 )
470 pubkey_point = master_public_key.pubkey.point + z*curve.generator
471 public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
472 address = public_key_to_bc_address( '04'.decode('hex') + public_key2.to_string() )
474 self.change_addresses.append(address)
476 self.addresses.append(address)
478 self.history[address] = []
484 def synchronize(self):
485 if not self.master_public_key:
490 if self.change_addresses == []:
491 new_addresses.append( self.create_new_address(True) )
493 a = self.change_addresses[-1]
494 if self.history.get(a):
495 new_addresses.append( self.create_new_address(True) )
501 if len(self.addresses) < n:
502 new_addresses.append( self.create_new_address(False) )
504 if map( lambda a: self.history.get(a), self.addresses[-n:] ) == n*[[]]:
507 new_addresses.append( self.create_new_address(False) )
510 num = self.get_remote_number()
511 while len(self.addresses)<num:
512 new_addresses.append( self.create_new_address(False) )
517 def get_remote_number(self):
519 server = jsonrpclib.Server(self.remote_url)
520 out = server.getnum()
523 def get_remote_mpk(self):
525 server = jsonrpclib.Server(self.remote_url)
526 out = server.getkey()
530 return (len(self.change_addresses) > 1 ) or ( len(self.addresses) > self.gap_limit )
532 def fill_addressbook(self):
533 for tx in self.tx_history.values():
535 for i in tx['outputs']:
536 if not self.is_mine(i) and i not in self.addressbook:
537 self.addressbook.append(i)
539 self.update_tx_labels()
544 'seed_version':self.seed_version,
545 'use_encryption':self.use_encryption,
546 'master_public_key': self.master_public_key.encode('hex'),
548 'server':self.server,
550 'addresses':self.addresses,
551 'change_addresses':self.change_addresses,
552 'history':self.history,
553 'labels':self.labels,
554 'contacts':self.addressbook,
555 'imported_keys':self.imported_keys,
556 'aliases':self.aliases,
557 'authorities':self.authorities,
558 'receipts':self.receipts,
559 'num_zeros':self.num_zeros,
560 'frozen_addresses':self.frozen_addresses,
562 f = open(self.path,"w")
569 upgrade_msg = """This wallet seed is deprecated. Please run upgrade.py for a diagnostic."""
570 self.file_exists = False
572 f = open(self.path,"r")
577 data = interface.old_to_new(data)
579 d = ast.literal_eval( data )
580 self.seed_version = d.get('seed_version')
581 self.master_public_key = d.get('master_public_key').decode('hex')
582 self.use_encryption = d.get('use_encryption')
583 self.fee = int( d.get('fee') )
584 self.seed = d.get('seed')
585 self.server = d.get('server')
586 #blocks = d.get('blocks')
587 self.addresses = d.get('addresses')
588 self.change_addresses = d.get('change_addresses')
589 self.history = d.get('history')
590 self.labels = d.get('labels')
591 self.addressbook = d.get('contacts')
592 self.imported_keys = d.get('imported_keys',{})
593 self.aliases = d.get('aliases',{})
594 self.authorities = d.get('authorities',{})
595 self.receipts = d.get('receipts',{})
596 self.num_zeros = d.get('num_zeros',0)
597 self.frozen_addresses = d.get('frozen_addresses',[])
599 raise BaseException("cannot read wallet file")
601 self.update_tx_history()
603 if self.seed_version != SEED_VERSION:
604 raise BaseException(upgrade_msg)
606 if self.remote_url: assert self.master_public_key.encode('hex') == self.get_remote_mpk()
608 self.file_exists = True
613 def get_addr_balance(self, addr):
614 assert self.is_mine(addr)
615 h = self.history.get(addr,[])
625 def get_balance(self):
627 for addr in self.all_addresses():
628 c, u = self.get_addr_balance(addr)
634 def choose_tx_inputs( self, amount, fixed_fee, from_addr = None ):
635 """ todo: minimize tx size """
637 fee = self.fee if fixed_fee is None else fixed_fee
640 domain = [from_addr] if from_addr else self.all_addresses()
641 for i in self.frozen_addresses:
642 if i in domain: domain.remove(i)
645 h = self.history.get(addr)
646 if h is None: continue
648 if item.get('raw_output_script'):
649 coins.append( (addr,item))
651 coins = sorted( coins, key = lambda x: x[1]['timestamp'] )
655 v = item.get('value')
657 inputs.append((addr, v, item['tx_hash'], item['index'], item['raw_output_script'], None, None) )
658 fee = self.fee*len(inputs) if fixed_fee is None else fixed_fee
659 if total >= amount + fee: break
661 #print "not enough funds: %d %d"%(total, fee)
663 return inputs, total, fee
665 def choose_tx_outputs( self, to_addr, amount, fee, total, change_addr=None ):
666 outputs = [ (to_addr, amount) ]
667 change_amount = total - ( amount + fee )
668 if change_amount != 0:
669 # normally, the update thread should ensure that the last change address is unused
671 change_addr = self.change_addresses[-1]
672 outputs.append( ( change_addr, change_amount) )
675 def sign_inputs( self, inputs, outputs, password ):
677 for i in range(len(inputs)):
678 addr, v, p_hash, p_pos, p_scriptPubKey, _, _ = inputs[i]
679 private_key = ecdsa.SigningKey.from_string( self.get_private_key(addr, password), curve = SECP256k1 )
680 public_key = private_key.get_verifying_key()
681 pubkey = public_key.to_string()
682 tx = filter( raw_tx( inputs, outputs, for_sig = i ) )
683 sig = private_key.sign_digest( Hash( tx.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
684 assert public_key.verify_digest( sig, Hash( tx.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
685 s_inputs.append( (addr, v, p_hash, p_pos, p_scriptPubKey, pubkey, sig) )
688 def pw_encode(self, s, password):
690 secret = Hash(password)
691 return EncodeAES(secret, s)
695 def pw_decode(self, s, password):
696 if password is not None:
697 secret = Hash(password)
698 d = DecodeAES(secret, s)
703 raise BaseException("Invalid password")
708 def get_status(self, address):
709 h = self.history.get(address)
714 status = lastpoint['block_hash']
715 if status == 'mempool':
716 status = status + ':%d'% len(h)
719 def receive_status_callback(self, addr, status):
721 if self.get_status(addr) != status:
722 #print "updating status for", addr, status
723 self.interface.get_history(addr)
725 def receive_history_callback(self, addr, data):
726 #print "updating history for", addr
728 self.history[addr] = data
729 self.update_tx_history()
732 def get_tx_history(self):
733 lines = self.tx_history.values()
734 lines = sorted(lines, key=operator.itemgetter("timestamp"))
737 def update_tx_history(self):
739 for addr in self.all_addresses():
740 h = self.history.get(addr)
741 if h is None: continue
743 tx_hash = tx['tx_hash']
744 line = self.tx_history.get(tx_hash)
746 self.tx_history[tx_hash] = copy.copy(tx)
747 line = self.tx_history.get(tx_hash)
749 line['value'] += tx['value']
750 if line['height'] == 0:
751 line['timestamp'] = 1e12
752 self.update_tx_labels()
754 def update_tx_labels(self):
755 for tx in self.tx_history.values():
758 for o_addr in tx['outputs']:
759 if not self.is_change(o_addr):
760 dest_label = self.labels.get(o_addr)
762 default_label = 'to: ' + dest_label
764 default_label = 'to: ' + o_addr
766 for o_addr in tx['outputs']:
767 if self.is_mine(o_addr) and not self.is_change(o_addr):
768 dest_label = self.labels.get(o_addr)
770 default_label = 'at: ' + dest_label
772 default_label = 'at: ' + o_addr
773 tx['default_label'] = default_label
775 def mktx(self, to_address, amount, label, password, fee=None, change_addr=None, from_addr= None):
776 if not self.is_valid(to_address):
777 raise BaseException("Invalid address")
778 inputs, total, fee = self.choose_tx_inputs( amount, fee, from_addr )
780 raise BaseException("Not enough funds")
781 outputs = self.choose_tx_outputs( to_address, amount, fee, total, change_addr )
782 s_inputs = self.sign_inputs( inputs, outputs, password )
784 tx = filter( raw_tx( s_inputs, outputs ) )
785 if to_address not in self.addressbook:
786 self.addressbook.append(to_address)
788 tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex')
789 self.labels[tx_hash] = label
793 def sendtx(self, tx):
794 tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex')
795 self.tx_event.clear()
796 self.interface.send([('blockchain.transaction.broadcast', [tx])])
800 return False, "error: " + out
802 self.receipts[tx_hash] = self.receipt
807 def read_alias(self, alias):
808 # this might not be the right place for this function.
811 m1 = re.match('([\w\-\.]+)@((\w[\w\-]+\.)+[\w\-]+)', alias)
812 m2 = re.match('((\w[\w\-]+\.)+[\w\-]+)', alias)
814 url = 'http://' + m1.group(2) + '/bitcoin.id/' + m1.group(1)
816 url = 'http://' + alias + '/bitcoin.id'
820 lines = urllib.urlopen(url).readlines()
825 line = lines[0].strip().split(':')
828 target = signing_addr = line[0]
830 target, auth_name, signing_addr, signature = line
831 msg = "alias:%s:%s:%s"%(alias,target,auth_name)
833 self.verify_message(signing_addr, signature, msg)
835 # other lines are signed updates
836 for line in lines[1:]:
838 if not line: continue
839 line = line.split(':')
842 target, signature = line
843 self.verify_message(previous, signature, "alias:%s:%s"%(alias,target))
845 if not self.is_valid(target):
846 raise BaseException("Invalid bitcoin address")
848 return target, signing_addr, auth_name
850 def update_password(self, seed, new_password):
851 if new_password == '': new_password = None
852 self.use_encryption = (new_password != None)
853 self.seed = self.pw_encode( seed, new_password)
854 for k in self.imported_keys.keys():
855 a = self.imported_keys[k]
856 b = self.pw_decode(a, password)
857 c = self.pw_encode(b, new_password)
858 self.imported_keys[k] = c
861 def get_alias(self, alias, interactive = False, show_message=None, question = None):
863 target, signing_address, auth_name = self.read_alias(alias)
864 except BaseException, e:
865 # raise exception if verify fails (verify the chain)
867 show_message("Alias error: " + str(e))
870 print target, signing_address, auth_name
872 if auth_name is None:
873 a = self.aliases.get(alias)
875 msg = "Warning: the alias '%s' is self-signed.\nThe signing address is %s.\n\nDo you want to add this alias to your list of contacts?"%(alias,signing_address)
876 if interactive and question( msg ):
877 self.aliases[alias] = (signing_address, target)
881 if signing_address != a[0]:
882 msg = "Warning: the key of alias '%s' has changed since your last visit! It is possible that someone is trying to do something nasty!!!\nDo you accept to change your trusted key?"%alias
883 if interactive and question( msg ):
884 self.aliases[alias] = (signing_address, target)
888 if signing_address not in self.authorities.keys():
889 msg = "The alias: '%s' links to %s\n\nWarning: this alias was signed by an unknown key.\nSigning authority: %s\nSigning address: %s\n\nDo you want to add this key to your list of trusted keys?"%(alias,target,auth_name,signing_address)
890 if interactive and question( msg ):
891 self.authorities[signing_address] = auth_name
896 self.aliases[alias] = (signing_address, target)
901 def parse_url(self, url, show_message, question):
902 o = url[8:].split('?')
905 params = o[1].split('&')
909 amount = label = message = signature = identity = ''
913 if k == 'amount': amount = uv
914 elif k == 'message': message = uv
915 elif k == 'label': label = uv
916 elif k == 'signature':
917 identity, signature = uv.split(':')
918 url = url.replace('&%s=%s'%(k,v),'')
923 if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', identity):
924 signing_address = self.get_alias(identity, True, show_message, question)
925 elif self.is_valid(identity):
926 signing_address = identity
928 signing_address = None
929 if not signing_address:
932 self.verify_message(signing_address, signature, url )
933 self.receipt = (signing_address, signature, url)
935 show_message('Warning: the URI contains a bad signature.\nThe identity of the recipient cannot be verified.')
936 address = amount = label = identity = message = ''
938 if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', address):
939 payto_address = self.get_alias(address, True, show_message, question)
941 address = address + ' <' + payto_address + '>'
943 return address, amount, label, message, signature, identity, url
947 self.interface.poke()
948 self.up_to_date_event.wait()
951 def start_session(self, interface):
952 self.interface = interface
953 self.interface.send([('server.banner',[]), ('blockchain.numblocks.subscribe',[]), ('server.peers.subscribe',[])])
954 self.interface.subscribe(self.all_addresses())