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 if not b: return None
386 b = ASecretToSecret( b )
387 secexp = int( b.encode('hex'), 16)
389 if address in self.addresses:
390 n = self.addresses.index(address)
392 elif address in self.change_addresses:
393 n = self.change_addresses.index(address)
396 raise BaseException("unknown address")
398 seed = self.pw_decode( self.seed, password)
400 raise BaseException("Invalid password")
401 if not seed: return None
402 secexp = self.stretch_key(seed)
403 secexp = ( secexp + self.get_sequence(n,for_change) ) % order
405 pk = number_to_string(secexp,order)
408 def msg_magic(self, message):
409 return "\x18Bitcoin Signed Message:\n" + chr( len(message) ) + message
411 def sign_message(self, address, message, password):
412 private_key = ecdsa.SigningKey.from_string( self.get_private_key(address, password), curve = SECP256k1 )
413 public_key = private_key.get_verifying_key()
414 signature = private_key.sign_digest( Hash( self.msg_magic( message ) ), sigencode = ecdsa.util.sigencode_string )
415 assert public_key.verify_digest( signature, Hash( self.msg_magic( message ) ), sigdecode = ecdsa.util.sigdecode_string)
417 sig = base64.b64encode( chr(27+i) + signature )
419 self.verify_message( address, sig, message)
424 raise BaseException("error: cannot sign message")
427 def verify_message(self, address, signature, message):
428 """ See http://www.secg.org/download/aid-780/sec1-v2.pdf for the math """
429 from ecdsa import numbertheory, ellipticcurve, util
431 curve = curve_secp256k1
432 G = generator_secp256k1
434 # extract r,s from signature
435 sig = base64.b64decode(signature)
436 if len(sig) != 65: raise BaseException("Wrong encoding")
437 r,s = util.sigdecode_string(sig[1:], order)
438 recid = ord(sig[0]) - 27
440 x = r + (recid/2) * order
442 alpha = ( x * x * x + curve.a() * x + curve.b() ) % curve.p()
443 beta = msqr.modular_sqrt(alpha, curve.p())
444 y = beta if (beta - recid) % 2 == 0 else curve.p() - beta
445 # 1.4 the constructor checks that nR is at infinity
446 R = ellipticcurve.Point(curve, x, y, order)
447 # 1.5 compute e from message:
448 h = Hash( self.msg_magic( message ) )
449 e = string_to_number(h)
451 # 1.6 compute Q = r^-1 (sR - eG)
452 inv_r = numbertheory.inverse_mod(r,order)
453 Q = inv_r * ( s * R + minus_e * G )
454 public_key = ecdsa.VerifyingKey.from_public_point( Q, curve = SECP256k1 )
455 # check that Q is the public key
456 public_key.verify_digest( sig[1:], h, sigdecode = ecdsa.util.sigdecode_string)
457 # check that we get the original signing address
458 addr = public_key_to_bc_address( '04'.decode('hex') + public_key.to_string() )
461 print "bad signature"
462 raise BaseException("Bad signature")
465 def create_new_address(self, for_change):
466 """ Publickey(type,n) = Master_public_key + H(n|S|type)*point """
468 n = len(self.change_addresses) if for_change else len(self.addresses)
469 z = self.get_sequence(n,for_change)
470 master_public_key = ecdsa.VerifyingKey.from_string( self.master_public_key, curve = SECP256k1 )
471 pubkey_point = master_public_key.pubkey.point + z*curve.generator
472 public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
473 address = public_key_to_bc_address( '04'.decode('hex') + public_key2.to_string() )
475 self.change_addresses.append(address)
477 self.addresses.append(address)
479 self.history[address] = []
485 def synchronize(self):
486 if not self.master_public_key:
491 if self.change_addresses == []:
492 new_addresses.append( self.create_new_address(True) )
494 a = self.change_addresses[-1]
495 if self.history.get(a):
496 new_addresses.append( self.create_new_address(True) )
502 if len(self.addresses) < n:
503 new_addresses.append( self.create_new_address(False) )
505 if map( lambda a: self.history.get(a), self.addresses[-n:] ) == n*[[]]:
508 new_addresses.append( self.create_new_address(False) )
511 num = self.get_remote_number()
512 while len(self.addresses)<num:
513 new_addresses.append( self.create_new_address(False) )
518 def get_remote_number(self):
520 server = jsonrpclib.Server(self.remote_url)
521 out = server.getnum()
524 def get_remote_mpk(self):
526 server = jsonrpclib.Server(self.remote_url)
527 out = server.getkey()
531 return (len(self.change_addresses) > 1 ) or ( len(self.addresses) > self.gap_limit )
533 def fill_addressbook(self):
534 for tx in self.tx_history.values():
536 for i in tx['outputs']:
537 if not self.is_mine(i) and i not in self.addressbook:
538 self.addressbook.append(i)
540 self.update_tx_labels()
545 'seed_version':self.seed_version,
546 'use_encryption':self.use_encryption,
547 'master_public_key': self.master_public_key.encode('hex'),
549 'server':self.server,
551 'addresses':self.addresses,
552 'change_addresses':self.change_addresses,
553 'history':self.history,
554 'labels':self.labels,
555 'contacts':self.addressbook,
556 'imported_keys':self.imported_keys,
557 'aliases':self.aliases,
558 'authorities':self.authorities,
559 'receipts':self.receipts,
560 'num_zeros':self.num_zeros,
561 'frozen_addresses':self.frozen_addresses,
563 f = open(self.path,"w")
570 upgrade_msg = """This wallet seed is deprecated. Please run upgrade.py for a diagnostic."""
571 self.file_exists = False
573 f = open(self.path,"r")
578 data = interface.old_to_new(data)
580 d = ast.literal_eval( data )
581 self.seed_version = d.get('seed_version')
582 self.master_public_key = d.get('master_public_key').decode('hex')
583 self.use_encryption = d.get('use_encryption')
584 self.fee = int( d.get('fee') )
585 self.seed = d.get('seed')
586 self.server = d.get('server')
587 #blocks = d.get('blocks')
588 self.addresses = d.get('addresses')
589 self.change_addresses = d.get('change_addresses')
590 self.history = d.get('history')
591 self.labels = d.get('labels')
592 self.addressbook = d.get('contacts')
593 self.imported_keys = d.get('imported_keys',{})
594 self.aliases = d.get('aliases',{})
595 self.authorities = d.get('authorities',{})
596 self.receipts = d.get('receipts',{})
597 self.num_zeros = d.get('num_zeros',0)
598 self.frozen_addresses = d.get('frozen_addresses',[])
600 raise BaseException("cannot read wallet file")
602 self.update_tx_history()
604 if self.seed_version != SEED_VERSION:
605 raise BaseException(upgrade_msg)
607 if self.remote_url: assert self.master_public_key.encode('hex') == self.get_remote_mpk()
609 self.file_exists = True
614 def get_addr_balance(self, addr):
615 assert self.is_mine(addr)
616 h = self.history.get(addr,[])
626 def get_balance(self):
628 for addr in self.all_addresses():
629 c, u = self.get_addr_balance(addr)
635 def choose_tx_inputs( self, amount, fixed_fee, from_addr = None ):
636 """ todo: minimize tx size """
638 fee = self.fee if fixed_fee is None else fixed_fee
641 domain = [from_addr] if from_addr else self.all_addresses()
642 for i in self.frozen_addresses:
643 if i in domain: domain.remove(i)
646 h = self.history.get(addr)
647 if h is None: continue
649 if item.get('raw_output_script'):
650 coins.append( (addr,item))
652 coins = sorted( coins, key = lambda x: x[1]['timestamp'] )
656 v = item.get('value')
658 inputs.append((addr, v, item['tx_hash'], item['index'], item['raw_output_script'], None, None) )
659 fee = self.fee*len(inputs) if fixed_fee is None else fixed_fee
660 if total >= amount + fee: break
662 #print "not enough funds: %d %d"%(total, fee)
664 return inputs, total, fee
666 def choose_tx_outputs( self, to_addr, amount, fee, total, change_addr=None ):
667 outputs = [ (to_addr, amount) ]
668 change_amount = total - ( amount + fee )
669 if change_amount != 0:
670 # normally, the update thread should ensure that the last change address is unused
672 change_addr = self.change_addresses[-1]
673 outputs.append( ( change_addr, change_amount) )
676 def sign_inputs( self, inputs, outputs, password ):
678 for i in range(len(inputs)):
679 addr, v, p_hash, p_pos, p_scriptPubKey, _, _ = inputs[i]
680 private_key = ecdsa.SigningKey.from_string( self.get_private_key(addr, password), curve = SECP256k1 )
681 public_key = private_key.get_verifying_key()
682 pubkey = public_key.to_string()
683 tx = filter( raw_tx( inputs, outputs, for_sig = i ) )
684 sig = private_key.sign_digest( Hash( tx.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
685 assert public_key.verify_digest( sig, Hash( tx.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
686 s_inputs.append( (addr, v, p_hash, p_pos, p_scriptPubKey, pubkey, sig) )
689 def pw_encode(self, s, password):
691 secret = Hash(password)
692 return EncodeAES(secret, s)
696 def pw_decode(self, s, password):
697 if password is not None:
698 secret = Hash(password)
699 d = DecodeAES(secret, s)
704 raise BaseException("Invalid password")
709 def get_status(self, address):
710 h = self.history.get(address)
715 status = lastpoint['block_hash']
716 if status == 'mempool':
717 status = status + ':%d'% len(h)
720 def receive_status_callback(self, addr, status):
722 if self.get_status(addr) != status:
723 #print "updating status for", addr, status
724 self.interface.get_history(addr)
726 def receive_history_callback(self, addr, data):
727 #print "updating history for", addr
729 self.history[addr] = data
730 self.update_tx_history()
733 def get_tx_history(self):
734 lines = self.tx_history.values()
735 lines = sorted(lines, key=operator.itemgetter("timestamp"))
738 def update_tx_history(self):
740 for addr in self.all_addresses():
741 h = self.history.get(addr)
742 if h is None: continue
744 tx_hash = tx['tx_hash']
745 line = self.tx_history.get(tx_hash)
747 self.tx_history[tx_hash] = copy.copy(tx)
748 line = self.tx_history.get(tx_hash)
750 line['value'] += tx['value']
751 if line['height'] == 0:
752 line['timestamp'] = 1e12
753 self.update_tx_labels()
755 def update_tx_labels(self):
756 for tx in self.tx_history.values():
759 for o_addr in tx['outputs']:
760 if not self.is_change(o_addr):
761 dest_label = self.labels.get(o_addr)
763 default_label = 'to: ' + dest_label
765 default_label = 'to: ' + o_addr
767 for o_addr in tx['outputs']:
768 if self.is_mine(o_addr) and not self.is_change(o_addr):
771 for o_addr in tx['outputs']:
772 if self.is_mine(o_addr):
778 dest_label = self.labels.get(o_addr)
780 default_label = 'at: ' + dest_label
782 default_label = 'at: ' + o_addr
784 tx['default_label'] = default_label
786 def mktx(self, to_address, amount, label, password, fee=None, change_addr=None, from_addr= None):
787 if not self.is_valid(to_address):
788 raise BaseException("Invalid address")
789 inputs, total, fee = self.choose_tx_inputs( amount, fee, from_addr )
791 raise BaseException("Not enough funds")
792 outputs = self.choose_tx_outputs( to_address, amount, fee, total, change_addr )
793 s_inputs = self.sign_inputs( inputs, outputs, password )
795 tx = filter( raw_tx( s_inputs, outputs ) )
796 if to_address not in self.addressbook:
797 self.addressbook.append(to_address)
799 tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex')
800 self.labels[tx_hash] = label
804 def sendtx(self, tx):
805 tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex')
806 self.tx_event.clear()
807 self.interface.send([('blockchain.transaction.broadcast', [tx])])
811 return False, "error: " + out
813 self.receipts[tx_hash] = self.receipt
818 def read_alias(self, alias):
819 # this might not be the right place for this function.
822 m1 = re.match('([\w\-\.]+)@((\w[\w\-]+\.)+[\w\-]+)', alias)
823 m2 = re.match('((\w[\w\-]+\.)+[\w\-]+)', alias)
825 url = 'http://' + m1.group(2) + '/bitcoin.id/' + m1.group(1)
827 url = 'http://' + alias + '/bitcoin.id'
831 lines = urllib.urlopen(url).readlines()
836 line = lines[0].strip().split(':')
839 target = signing_addr = line[0]
841 target, auth_name, signing_addr, signature = line
842 msg = "alias:%s:%s:%s"%(alias,target,auth_name)
844 self.verify_message(signing_addr, signature, msg)
846 # other lines are signed updates
847 for line in lines[1:]:
849 if not line: continue
850 line = line.split(':')
853 target, signature = line
854 self.verify_message(previous, signature, "alias:%s:%s"%(alias,target))
856 if not self.is_valid(target):
857 raise BaseException("Invalid bitcoin address")
859 return target, signing_addr, auth_name
861 def update_password(self, seed, old_password, new_password):
862 if new_password == '': new_password = None
863 self.use_encryption = (new_password != None)
864 self.seed = self.pw_encode( seed, new_password)
865 for k in self.imported_keys.keys():
866 a = self.imported_keys[k]
867 b = self.pw_decode(a, old_password)
868 c = self.pw_encode(b, new_password)
869 self.imported_keys[k] = c
872 def get_alias(self, alias, interactive = False, show_message=None, question = None):
874 target, signing_address, auth_name = self.read_alias(alias)
875 except BaseException, e:
876 # raise exception if verify fails (verify the chain)
878 show_message("Alias error: " + str(e))
881 print target, signing_address, auth_name
883 if auth_name is None:
884 a = self.aliases.get(alias)
886 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)
887 if interactive and question( msg ):
888 self.aliases[alias] = (signing_address, target)
892 if signing_address != a[0]:
893 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
894 if interactive and question( msg ):
895 self.aliases[alias] = (signing_address, target)
899 if signing_address not in self.authorities.keys():
900 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)
901 if interactive and question( msg ):
902 self.authorities[signing_address] = auth_name
907 self.aliases[alias] = (signing_address, target)
912 def parse_url(self, url, show_message, question):
913 o = url[8:].split('?')
916 params = o[1].split('&')
920 amount = label = message = signature = identity = ''
924 if k == 'amount': amount = uv
925 elif k == 'message': message = uv
926 elif k == 'label': label = uv
927 elif k == 'signature':
928 identity, signature = uv.split(':')
929 url = url.replace('&%s=%s'%(k,v),'')
934 if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', identity):
935 signing_address = self.get_alias(identity, True, show_message, question)
936 elif self.is_valid(identity):
937 signing_address = identity
939 signing_address = None
940 if not signing_address:
943 self.verify_message(signing_address, signature, url )
944 self.receipt = (signing_address, signature, url)
946 show_message('Warning: the URI contains a bad signature.\nThe identity of the recipient cannot be verified.')
947 address = amount = label = identity = message = ''
949 if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', address):
950 payto_address = self.get_alias(address, True, show_message, question)
952 address = address + ' <' + payto_address + '>'
954 return address, amount, label, message, signature, identity, url
958 self.interface.poke()
959 self.up_to_date_event.wait()
962 def start_session(self, interface):
963 self.interface = interface
964 self.interface.send([('server.banner',[]), ('blockchain.numblocks.subscribe',[]), ('server.peers.subscribe',[])])
965 self.interface.subscribe(self.all_addresses())