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
24 from ecdsa.util import string_to_number, number_to_string
26 print "python-ecdsa does not seem to be installed. Try 'sudo easy_install ecdsa'"
32 print "AES does not seem to be installed. Try 'sudo easy_install slowaes'"
36 ############ functions from pywallet #####################
40 def hash_160(public_key):
42 md = hashlib.new('ripemd160')
43 md.update(hashlib.sha256(public_key).digest())
47 md = ripemd.new(hashlib.sha256(public_key).digest())
51 def public_key_to_bc_address(public_key):
52 h160 = hash_160(public_key)
53 return hash_160_to_bc_address(h160)
55 def hash_160_to_bc_address(h160):
56 vh160 = chr(addrtype) + h160
59 return b58encode(addr)
61 def bc_address_to_hash_160(addr):
62 bytes = b58decode(addr, 25)
65 __b58chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
66 __b58base = len(__b58chars)
69 """ encode v, which is a string of bytes, to base58.
73 for (i, c) in enumerate(v[::-1]):
74 long_value += (256**i) * ord(c)
77 while long_value >= __b58base:
78 div, mod = divmod(long_value, __b58base)
79 result = __b58chars[mod] + result
81 result = __b58chars[long_value] + result
83 # Bitcoin does a little leading-zero-compression:
84 # leading 0-bytes in the input become leading-1s
87 if c == '\0': nPad += 1
90 return (__b58chars[0]*nPad) + result
92 def b58decode(v, length):
93 """ decode v into a string of len bytes
96 for (i, c) in enumerate(v[::-1]):
97 long_value += __b58chars.find(c) * (__b58base**i)
100 while long_value >= 256:
101 div, mod = divmod(long_value, 256)
102 result = chr(mod) + result
104 result = chr(long_value) + result
108 if c == __b58chars[0]: nPad += 1
111 result = chr(0)*nPad + result
112 if length is not None and len(result) != length:
119 return hashlib.sha256(hashlib.sha256(data).digest()).digest()
121 def EncodeBase58Check(vchIn):
123 return b58encode(vchIn + hash[0:4])
125 def DecodeBase58Check(psz):
126 vchRet = b58decode(psz, None)
136 def PrivKeyToSecret(privkey):
137 return privkey[9:9+32]
139 def SecretToASecret(secret):
140 vchIn = chr(addrtype+128) + secret
141 return EncodeBase58Check(vchIn)
143 def ASecretToSecret(key):
144 vch = DecodeBase58Check(key)
145 if vch and vch[0] == chr(addrtype+128):
150 ########### end pywallet functions #######################
153 _ud = re.compile('%([0-9a-hA-H]{2})', re.MULTILINE)
154 urldecode = lambda x: _ud.sub(lambda m: chr(int(m.group(1), 16)), x)
157 def int_to_hex(i, length=1):
158 s = hex(i)[2:].rstrip('L')
159 s = "0"*(2*length - len(s)) + s
160 return s.decode('hex')[::-1].encode('hex')
164 EncodeAES = lambda secret, s: base64.b64encode(aes.encryptData(secret,s))
165 DecodeAES = lambda secret, e: aes.decryptData(secret, base64.b64decode(e))
169 # secp256k1, http://www.oid-info.com/get/1.3.132.0.10
170 _p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2FL
171 _r = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141L
172 _b = 0x0000000000000000000000000000000000000000000000000000000000000007L
173 _a = 0x0000000000000000000000000000000000000000000000000000000000000000L
174 _Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798L
175 _Gy = 0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8L
176 curve_secp256k1 = ecdsa.ellipticcurve.CurveFp( _p, _a, _b )
177 generator_secp256k1 = ecdsa.ellipticcurve.Point( curve_secp256k1, _Gx, _Gy, _r )
178 oid_secp256k1 = (1,3,132,0,10)
179 SECP256k1 = ecdsa.curves.Curve("SECP256k1", curve_secp256k1, generator_secp256k1, oid_secp256k1 )
183 out = re.sub('( [^\n]*|)\n','',s)
184 out = out.replace(' ','')
185 out = out.replace('\n','')
188 def raw_tx( inputs, outputs, for_sig = None ):
189 s = int_to_hex(1,4) + ' version\n'
190 s += int_to_hex( len(inputs) ) + ' number of inputs\n'
191 for i in range(len(inputs)):
192 _, _, p_hash, p_index, p_script, pubkey, sig = inputs[i]
193 s += p_hash.decode('hex')[::-1].encode('hex') + ' prev hash\n'
194 s += int_to_hex(p_index,4) + ' prev index\n'
196 sig = sig + chr(1) # hashtype
197 script = int_to_hex( len(sig)) + ' push %d bytes\n'%len(sig)
198 script += sig.encode('hex') + ' sig\n'
199 pubkey = chr(4) + pubkey
200 script += int_to_hex( len(pubkey)) + ' push %d bytes\n'%len(pubkey)
201 script += pubkey.encode('hex') + ' pubkey\n'
203 script = p_script + ' scriptsig \n'
206 s += int_to_hex( len(filter(script))/2 ) + ' script length \n'
208 s += "ffffffff" + ' sequence\n'
209 s += int_to_hex( len(outputs) ) + ' number of outputs\n'
210 for output in outputs:
211 addr, amount = output
212 s += int_to_hex( amount, 8) + ' amount: %d\n'%amount
213 script = '76a9' # op_dup, op_hash_160
214 script += '14' # push 0x14 bytes
215 script += bc_address_to_hash_160(addr).encode('hex')
216 script += '88ac' # op_equalverify, op_checksig
217 s += int_to_hex( len(filter(script))/2 ) + ' script length \n'
218 s += script + ' script \n'
219 s += int_to_hex(0,4) # lock time
220 if for_sig is not None: s += int_to_hex(1, 4) # hash type
226 def format_satoshis(x, is_diff=False, num_zeros = 0):
227 from decimal import Decimal
228 s = str( Decimal(x) /100000000 )
231 if not '.' in s: s += '.'
233 s += "0"*( 1 + num_zeros - ( len(s) - p ))
234 s += " "*( 9 - ( len(s) - p ))
235 s = " "*( 5 - ( p )) + s
239 from version import ELECTRUM_VERSION, SEED_VERSION
240 from interface import DEFAULT_SERVERS
246 def __init__(self, gui_callback = lambda: None):
248 self.electrum_version = ELECTRUM_VERSION
249 self.seed_version = SEED_VERSION
250 self.gui_callback = gui_callback
252 self.gap_limit = 5 # configuration
255 self.master_public_key = ''
258 self.use_encryption = False
259 self.addresses = [] # receiving addresses visible for user
260 self.change_addresses = [] # addresses used as change
261 self.seed = '' # encrypted
263 self.labels = {} # labels for addresses and transactions
264 self.aliases = {} # aliases for addresses
265 self.authorities = {} # trusted addresses
266 self.frozen_addresses = []
268 self.receipts = {} # signed URIs
269 self.receipt = None # next receipt
270 self.addressbook = [] # outgoing addresses, for payments
275 self.imported_keys = {}
276 self.remote_url = None
278 self.was_updated = True
282 # there is a difference between self.up_to_date and self.is_up_to_date()
283 # self.is_up_to_date() returns true when all requests have been answered and processed
284 # self.up_to_date is true when the wallet is synchronized (stronger requirement)
285 self.up_to_date_event = threading.Event()
286 self.up_to_date_event.clear()
287 self.up_to_date = False
288 self.lock = threading.Lock()
289 self.tx_event = threading.Event()
291 self.pick_random_server()
295 def pick_random_server(self):
296 self.server = random.choice( DEFAULT_SERVERS ) # random choice when the wallet is created
298 def is_up_to_date(self):
299 return self.interface.responses.empty() and not self.interface.unanswered_requests
301 def set_server(self, server):
302 # raise an error if the format isnt correct
303 a,b,c = server.split(':')
305 assert c in ['t','h','n']
307 if server != self.server:
310 self.interface.is_connected = False # this exits the polling loop
312 def set_path(self, wallet_path):
314 if wallet_path is not None:
315 self.path = wallet_path
317 # backward compatibility: look for wallet file in the default data directory
318 if "HOME" in os.environ:
319 wallet_dir = os.path.join( os.environ["HOME"], '.electrum')
320 elif "LOCALAPPDATA" in os.environ:
321 wallet_dir = os.path.join( os.environ["LOCALAPPDATA"], 'Electrum' )
322 elif "APPDATA" in os.environ:
323 wallet_dir = os.path.join( os.environ["APPDATA"], 'Electrum' )
325 raise BaseException("No home directory found in environment variables.")
327 if not os.path.exists( wallet_dir ): os.mkdir( wallet_dir )
328 self.path = os.path.join( wallet_dir, 'electrum.dat' )
330 def import_key(self, keypair, password):
331 address, key = keypair.split(':')
332 if not self.is_valid(address): return False
333 if address in self.all_addresses(): return False
334 b = ASecretToSecret( key )
335 if not b: return False
336 secexp = int( b.encode('hex'), 16)
337 private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve=SECP256k1 )
339 public_key = private_key.get_verifying_key()
340 if not address == public_key_to_bc_address( '04'.decode('hex') + public_key.to_string() ): return False
341 self.imported_keys[address] = self.pw_encode( key, password )
344 def new_seed(self, password):
345 seed = "%032x"%ecdsa.util.randrange( pow(2,128) )
348 self.seed = self.pw_encode( seed, password )
351 def init_mpk(self,seed):
354 secexp = self.stretch_key(seed)
355 master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
356 self.master_public_key = master_private_key.get_verifying_key().to_string()
358 def all_addresses(self):
359 return self.addresses + self.change_addresses + self.imported_keys.keys()
361 def is_mine(self, address):
362 return address in self.all_addresses()
364 def is_change(self, address):
365 return address in self.change_addresses
367 def is_valid(self,addr):
368 ADDRESS_RE = re.compile('[1-9A-HJ-NP-Za-km-z]{26,}\\Z')
369 if not ADDRESS_RE.match(addr): return False
371 h = bc_address_to_hash_160(addr)
374 return addr == hash_160_to_bc_address(h)
376 def stretch_key(self,seed):
378 for i in range(100000):
379 seed = hashlib.sha256(seed + oldseed).digest()
380 return string_to_number( seed )
382 def get_sequence(self,n,for_change):
383 return string_to_number( Hash( "%d:%d:"%(n,for_change) + self.master_public_key ) )
385 def get_private_key(self, address, password):
386 """ Privatekey(type,n) = Master_private_key + H(n|S|type) """
387 order = generator_secp256k1.order()
389 if address in self.imported_keys.keys():
390 b = self.pw_decode( self.imported_keys[address], password )
391 b = ASecretToSecret( b )
392 secexp = int( b.encode('hex'), 16)
394 if address in self.addresses:
395 n = self.addresses.index(address)
397 elif address in self.change_addresses:
398 n = self.change_addresses.index(address)
401 raise BaseException("unknown address")
403 seed = self.pw_decode( self.seed, password)
405 raise BaseException("Invalid password")
406 secexp = self.stretch_key(seed)
407 secexp = ( secexp + self.get_sequence(n,for_change) ) % order
409 pk = number_to_string(secexp,order)
412 def msg_magic(self, message):
413 return "\x18Bitcoin Signed Message:\n" + chr( len(message) ) + message
415 def sign_message(self, address, message, password):
416 private_key = ecdsa.SigningKey.from_string( self.get_private_key(address, password), curve = SECP256k1 )
417 public_key = private_key.get_verifying_key()
418 signature = private_key.sign_digest( Hash( self.msg_magic( message ) ), sigencode = ecdsa.util.sigencode_string )
419 assert public_key.verify_digest( signature, Hash( self.msg_magic( message ) ), sigdecode = ecdsa.util.sigdecode_string)
421 sig = base64.b64encode( chr(27+i) + signature )
423 self.verify_message( address, sig, message)
428 raise BaseException("error: cannot sign message")
431 def verify_message(self, address, signature, message):
432 """ See http://www.secg.org/download/aid-780/sec1-v2.pdf for the math """
433 from ecdsa import numbertheory, ellipticcurve, util
435 curve = curve_secp256k1
436 G = generator_secp256k1
438 # extract r,s from signature
439 sig = base64.b64decode(signature)
440 if len(sig) != 65: raise BaseException("Wrong encoding")
441 r,s = util.sigdecode_string(sig[1:], order)
442 recid = ord(sig[0]) - 27
444 x = r + (recid/2) * order
446 alpha = ( x * x * x + curve.a() * x + curve.b() ) % curve.p()
447 beta = msqr.modular_sqrt(alpha, curve.p())
448 y = beta if (beta - recid) % 2 == 0 else curve.p() - beta
449 # 1.4 the constructor checks that nR is at infinity
450 R = ellipticcurve.Point(curve, x, y, order)
451 # 1.5 compute e from message:
452 h = Hash( self.msg_magic( message ) )
453 e = string_to_number(h)
455 # 1.6 compute Q = r^-1 (sR - eG)
456 inv_r = numbertheory.inverse_mod(r,order)
457 Q = inv_r * ( s * R + minus_e * G )
458 public_key = ecdsa.VerifyingKey.from_public_point( Q, curve = SECP256k1 )
459 # check that Q is the public key
460 public_key.verify_digest( sig[1:], h, sigdecode = ecdsa.util.sigdecode_string)
461 # check that we get the original signing address
462 addr = public_key_to_bc_address( '04'.decode('hex') + public_key.to_string() )
465 print "bad signature"
466 raise BaseException("Bad signature")
469 def create_new_address(self, for_change):
470 """ Publickey(type,n) = Master_public_key + H(n|S|type)*point """
472 n = len(self.change_addresses) if for_change else len(self.addresses)
473 z = self.get_sequence(n,for_change)
474 master_public_key = ecdsa.VerifyingKey.from_string( self.master_public_key, curve = SECP256k1 )
475 pubkey_point = master_public_key.pubkey.point + z*curve.generator
476 public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
477 address = public_key_to_bc_address( '04'.decode('hex') + public_key2.to_string() )
479 self.change_addresses.append(address)
481 self.addresses.append(address)
483 self.history[address] = []
489 def synchronize(self):
490 if not self.master_public_key:
495 if self.change_addresses == []:
496 new_addresses.append( self.create_new_address(True) )
498 a = self.change_addresses[-1]
499 if self.history.get(a):
500 new_addresses.append( self.create_new_address(True) )
506 if len(self.addresses) < n:
507 new_addresses.append( self.create_new_address(False) )
509 if map( lambda a: self.history.get(a), self.addresses[-n:] ) == n*[[]]:
512 new_addresses.append( self.create_new_address(False) )
515 num = self.get_remote_number()
516 while len(self.addresses)<num:
517 new_addresses.append( self.create_new_address(False) )
522 def get_remote_number(self):
524 server = jsonrpclib.Server(self.remote_url)
525 out = server.getnum()
528 def get_remote_mpk(self):
530 server = jsonrpclib.Server(self.remote_url)
531 out = server.getkey()
535 return (len(self.change_addresses) > 1 ) or ( len(self.addresses) > self.gap_limit )
537 def fill_addressbook(self):
538 for tx in self.tx_history.values():
540 for i in tx['outputs']:
541 if not self.is_mine(i) and i not in self.addressbook:
542 self.addressbook.append(i)
544 self.update_tx_labels()
549 'seed_version':self.seed_version,
550 'use_encryption':self.use_encryption,
551 'master_public_key': self.master_public_key.encode('hex'),
553 'server':self.server,
555 'addresses':self.addresses,
556 'change_addresses':self.change_addresses,
557 'history':self.history,
558 'labels':self.labels,
559 'contacts':self.addressbook,
560 'imported_keys':self.imported_keys,
561 'aliases':self.aliases,
562 'authorities':self.authorities,
563 'receipts':self.receipts,
564 'num_zeros':self.num_zeros,
565 'frozen_addresses':self.frozen_addresses,
567 f = open(self.path,"w")
574 upgrade_msg = """This wallet seed is deprecated. Please run upgrade.py for a diagnostic."""
575 self.file_exists = False
577 f = open(self.path,"r")
582 data = interface.old_to_new(data)
584 d = ast.literal_eval( data )
585 self.seed_version = d.get('seed_version')
586 self.master_public_key = d.get('master_public_key').decode('hex')
587 self.use_encryption = d.get('use_encryption')
588 self.fee = int( d.get('fee') )
589 self.seed = d.get('seed')
590 self.server = d.get('server')
591 #blocks = d.get('blocks')
592 self.addresses = d.get('addresses')
593 self.change_addresses = d.get('change_addresses')
594 self.history = d.get('history')
595 self.labels = d.get('labels')
596 self.addressbook = d.get('contacts')
597 self.imported_keys = d.get('imported_keys',{})
598 self.aliases = d.get('aliases',{})
599 self.authorities = d.get('authorities',{})
600 self.receipts = d.get('receipts',{})
601 self.num_zeros = d.get('num_zeros',0)
602 self.frozen_addresses = d.get('frozen_addresses',[])
604 raise BaseException("cannot read wallet file")
606 self.update_tx_history()
608 if self.seed_version != SEED_VERSION:
609 raise BaseException(upgrade_msg)
611 if self.remote_url: assert self.master_public_key.encode('hex') == self.get_remote_mpk()
613 self.file_exists = True
618 def get_addr_balance(self, addr):
619 assert self.is_mine(addr)
620 h = self.history.get(addr,[])
630 def get_balance(self):
632 for addr in self.all_addresses():
633 c, u = self.get_addr_balance(addr)
639 def choose_tx_inputs( self, amount, fixed_fee, from_addr = None ):
640 """ todo: minimize tx size """
642 fee = self.fee if fixed_fee is None else fixed_fee
645 domain = [from_addr] if from_addr else self.all_addresses()
646 for i in self.frozen_addresses:
647 if i in domain: domain.remove(i)
650 h = self.history.get(addr)
651 if h is None: continue
653 if item.get('raw_output_script'):
654 coins.append( (addr,item))
656 coins = sorted( coins, key = lambda x: x[1]['timestamp'] )
660 v = item.get('value')
662 inputs.append((addr, v, item['tx_hash'], item['index'], item['raw_output_script'], None, None) )
663 fee = self.fee*len(inputs) if fixed_fee is None else fixed_fee
664 if total >= amount + fee: break
666 #print "not enough funds: %d %d"%(total, fee)
668 return inputs, total, fee
670 def choose_tx_outputs( self, to_addr, amount, fee, total, change_addr=None ):
671 outputs = [ (to_addr, amount) ]
672 change_amount = total - ( amount + fee )
673 if change_amount != 0:
674 # normally, the update thread should ensure that the last change address is unused
676 change_addr = self.change_addresses[-1]
677 outputs.append( ( change_addr, change_amount) )
680 def sign_inputs( self, inputs, outputs, password ):
682 for i in range(len(inputs)):
683 addr, v, p_hash, p_pos, p_scriptPubKey, _, _ = inputs[i]
684 private_key = ecdsa.SigningKey.from_string( self.get_private_key(addr, password), curve = SECP256k1 )
685 public_key = private_key.get_verifying_key()
686 pubkey = public_key.to_string()
687 tx = filter( raw_tx( inputs, outputs, for_sig = i ) )
688 sig = private_key.sign_digest( Hash( tx.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
689 assert public_key.verify_digest( sig, Hash( tx.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
690 s_inputs.append( (addr, v, p_hash, p_pos, p_scriptPubKey, pubkey, sig) )
693 def pw_encode(self, s, password):
695 secret = Hash(password)
696 return EncodeAES(secret, s)
700 def pw_decode(self, s, password):
701 if password is not None:
702 secret = Hash(password)
703 d = DecodeAES(secret, s)
708 raise BaseException("Invalid password")
713 def get_status(self, address):
714 h = self.history.get(address)
719 status = lastpoint['block_hash']
720 if status == 'mempool':
721 status = status + ':%d'% len(h)
724 def receive_status_callback(self, addr, status):
726 if self.get_status(addr) != status:
727 #print "updating status for", addr, status
728 self.interface.get_history(addr)
730 def receive_history_callback(self, addr, data):
731 #print "updating history for", addr
733 self.history[addr] = data
734 self.update_tx_history()
737 def get_tx_history(self):
738 lines = self.tx_history.values()
739 lines = sorted(lines, key=operator.itemgetter("timestamp"))
742 def update_tx_history(self):
744 for addr in self.all_addresses():
745 h = self.history.get(addr)
746 if h is None: continue
748 tx_hash = tx['tx_hash']
749 line = self.tx_history.get(tx_hash)
751 self.tx_history[tx_hash] = copy.copy(tx)
752 line = self.tx_history.get(tx_hash)
754 line['value'] += tx['value']
755 if line['height'] == 0:
756 line['timestamp'] = 1e12
757 self.update_tx_labels()
759 def update_tx_labels(self):
760 for tx in self.tx_history.values():
763 for o_addr in tx['outputs']:
764 if not self.is_change(o_addr):
765 dest_label = self.labels.get(o_addr)
767 default_label = 'to: ' + dest_label
769 default_label = 'to: ' + o_addr
771 for o_addr in tx['outputs']:
772 if self.is_mine(o_addr) and not self.is_change(o_addr):
773 dest_label = self.labels.get(o_addr)
775 default_label = 'at: ' + dest_label
777 default_label = 'at: ' + o_addr
778 tx['default_label'] = default_label
780 def mktx(self, to_address, amount, label, password, fee=None, change_addr=None, from_addr= None):
781 if not self.is_valid(to_address):
782 raise BaseException("Invalid address")
783 inputs, total, fee = self.choose_tx_inputs( amount, fee, from_addr )
785 raise BaseException("Not enough funds")
786 outputs = self.choose_tx_outputs( to_address, amount, fee, total, change_addr )
787 s_inputs = self.sign_inputs( inputs, outputs, password )
789 tx = filter( raw_tx( s_inputs, outputs ) )
790 if to_address not in self.addressbook:
791 self.addressbook.append(to_address)
793 tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex')
794 self.labels[tx_hash] = label
798 def sendtx(self, tx):
799 tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex')
800 self.tx_event.clear()
801 self.interface.send([('blockchain.transaction.broadcast', [tx])])
805 return False, "error: " + out
807 self.receipts[tx_hash] = self.receipt
812 def read_alias(self, alias):
813 # this might not be the right place for this function.
816 m1 = re.match('([\w\-\.]+)@((\w[\w\-]+\.)+[\w\-]+)', alias)
817 m2 = re.match('((\w[\w\-]+\.)+[\w\-]+)', alias)
819 url = 'http://' + m1.group(2) + '/bitcoin.id/' + m1.group(1)
821 url = 'http://' + alias + '/bitcoin.id'
825 lines = urllib.urlopen(url).readlines()
830 line = lines[0].strip().split(':')
833 target = signing_addr = line[0]
835 target, auth_name, signing_addr, signature = line
836 msg = "alias:%s:%s:%s"%(alias,target,auth_name)
838 self.verify_message(signing_addr, signature, msg)
840 # other lines are signed updates
841 for line in lines[1:]:
843 if not line: continue
844 line = line.split(':')
847 target, signature = line
848 self.verify_message(previous, signature, "alias:%s:%s"%(alias,target))
850 if not self.is_valid(target):
851 raise BaseException("Invalid bitcoin address")
853 return target, signing_addr, auth_name
855 def update_password(self, seed, new_password):
856 if new_password == '': new_password = None
857 self.use_encryption = (new_password != None)
858 self.seed = self.pw_encode( seed, new_password)
859 for k in self.imported_keys.keys():
860 a = self.imported_keys[k]
861 b = self.pw_decode(a, password)
862 c = self.pw_encode(b, new_password)
863 self.imported_keys[k] = c
866 def get_alias(self, alias, interactive = False, show_message=None, question = None):
868 target, signing_address, auth_name = self.read_alias(alias)
869 except BaseException, e:
870 # raise exception if verify fails (verify the chain)
872 show_message("Alias error: " + e.message)
875 print target, signing_address, auth_name
877 if auth_name is None:
878 a = self.aliases.get(alias)
880 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)
881 if interactive and question( msg ):
882 self.aliases[alias] = (signing_address, target)
886 if signing_address != a[0]:
887 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
888 if interactive and question( msg ):
889 self.aliases[alias] = (signing_address, target)
893 if signing_address not in self.authorities.keys():
894 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)
895 if interactive and question( msg ):
896 self.authorities[signing_address] = auth_name
901 self.aliases[alias] = (signing_address, target)
906 def parse_url(self, url, show_message, question):
907 o = url[8:].split('?')
910 params = o[1].split('&')
914 amount = label = message = signature = identity = ''
918 if k == 'amount': amount = uv
919 elif k == 'message': message = uv
920 elif k == 'label': label = uv
921 elif k == 'signature':
922 identity, signature = uv.split(':')
923 url = url.replace('&%s=%s'%(k,v),'')
928 if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', identity):
929 signing_address = self.get_alias(identity, True, show_message, question)
930 elif self.is_valid(identity):
931 signing_address = identity
933 signing_address = None
934 if not signing_address:
937 self.verify_message(signing_address, signature, url )
938 self.receipt = (signing_address, signature, url)
940 show_message('Warning: the URI contains a bad signature.\nThe identity of the recipient cannot be verified.')
941 address = amount = label = identity = message = ''
943 if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', address):
944 payto_address = self.get_alias(address, True, show_message, question)
946 address = address + ' <' + payto_address + '>'
948 return address, amount, label, message, signature, identity, url
952 self.interface.poke()
953 self.up_to_date_event.wait()
956 def start_session(self, interface):
957 self.interface = interface
958 self.interface.send([('server.banner',[]), ('blockchain.numblocks.subscribe',[]), ('server.peers.subscribe',[])])
959 self.interface.subscribe(self.all_addresses())