def on_JM_REQUEST_MSGSIG_VERIFY(self, msg, fullmsg, sig, pubkey, nick,
hashlen, max_encoded, hostid):
verif_result = True
if not btc.ecdsa_verify(str(msg), sig, pubkey):
# workaround for hostid, which sometimes is lowercase-only for some IRC connections
if not btc.ecdsa_verify(str(msg[:-len(hostid)] + hostid.lower()),
sig, pubkey):
jlog.debug("nick signature verification failed, ignoring: " +
str(nick))
verif_result = False
#check that nick matches hash of pubkey
nick_pkh_raw = btc.bin_sha256(pubkey)[:hashlen]
nick_stripped = nick[2:2 + max_encoded]
#strip right padding
nick_unpadded = ''.join([x for x in nick_stripped if x != 'O'])
if not nick_unpadded == btc.b58encode(nick_pkh_raw):
jlog.debug("Nick hash check failed, expected: " +
str(nick_unpadded) + ", got: " +
str(btc.b58encode(nick_pkh_raw)))
verif_result = False
d = self.callRemote(commands.JMMsgSignatureVerify,
verif_result=verif_result,
nick=nick,
fullmsg=fullmsg,
hostid=hostid)
self.defaultCallbacks(d)
return {'accepted': True}
def make_valid_nick(i=0):
nick_priv = hashlib.sha256(chr(i) * 16).hexdigest() + '01'
nick_pubkey = bitcoin.privtopub(nick_priv)
nick_pkh_raw = hashlib.sha256(nick_pubkey).digest()[:NICK_HASH_LENGTH]
nick_pkh = bitcoin.b58encode(nick_pkh_raw)
#right pad to maximum possible; b58 is not fixed length.
#Use 'O' as one of the 4 not included chars in base58.
nick_pkh += 'O' * (NICK_MAX_ENCODED - len(nick_pkh))
#The constructed length will be 1 + 1 + NICK_MAX_ENCODED
return JOINMARKET_NICK_HEADER + str(JM_VERSION) + nick_pkh
def set_nick(self):
self.nick_pubkey = btc.privtopub(self.nick_priv)
self.nick_pkh_raw = btc.bin_sha256(
self.nick_pubkey)[:self.nick_hashlen]
self.nick_pkh = btc.b58encode(self.nick_pkh_raw)
#right pad to maximum possible; b58 is not fixed length.
#Use 'O' as one of the 4 not included chars in base58.
self.nick_pkh += 'O' * (self.nick_maxencoded - len(self.nick_pkh))
#The constructed length will be 1 + 1 + NICK_MAX_ENCODED
self.nick = self.nick_header + str(self.jm_version) + self.nick_pkh
jm_single().nickname = self.nick
informuser = getattr(self.client, "inform_user_details", None)
if callable(informuser):
informuser()
def get_dummy_nick():
"""In Joinmarket-CS nick creation is negotiated
between client and server/daemon so as to allow
client to sign for messages; here we only ever publish
an orderbook request, so no such need, but for better
privacy, a conformant nick is created based on a random
pseudo-pubkey."""
nick_pkh_raw = hashlib.sha256(os.urandom(10)).digest()[:NICK_HASH_LENGTH]
nick_pkh = btc.b58encode(nick_pkh_raw)
#right pad to maximum possible; b58 is not fixed length.
#Use 'O' as one of the 4 not included chars in base58.
nick_pkh += 'O' * (NICK_MAX_ENCODED - len(nick_pkh))
#The constructed length will be 1 + 1 + NICK_MAX_ENCODED
nick = JOINMARKET_NICK_HEADER + str(JM_VERSION) + nick_pkh
jm_single().nickname = nick
return nick
