Fixed: Code style and lint fixes
This commit is contained in:
coffeedogs
parent
74ddda8775
commit
ab1dd319e3
13
setup.cfg
13
setup.cfg
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@ -1,10 +1,17 @@
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# Since there is overlap in the violations that the different tools check for, it makes sense to quiesce some warnings
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# in some tools if those warnings in other tools are preferred. This avoids the need to add duplicate lint warnings.
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[pycodestyle]
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max-line-length = 119
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[flake8]
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max-line-length = 119
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ignore = E722
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ignore = E722,F841
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# E722: pylint is preferred for bare-except
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# F841: pylint is preferred for unused-variable
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# pylint
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# pylint honours the [MESSAGES CONTROL] section
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[MESSAGES CONTROL]
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disable=invalid-name,bare-except
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disable=invalid-name,bare-except,broad-except
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# invalid-name: needs fixing during a large, project-wide refactor
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# bare-except,broad-except: Need fixing once thorough testing is easier
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176
src/protocol.py
176
src/protocol.py
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@ -1,3 +1,13 @@
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# pylint: disable=too-many-boolean-expressions,too-many-return-statements,too-many-locals,too-many-statements
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"""
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protocol.py
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===========
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Low-level protocol-related functions.
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"""
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from __future__ import absolute_import
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import base64
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from binascii import hexlify
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import hashlib
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@ -9,17 +19,18 @@ import sys
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import time
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import traceback
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import defaults
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import highlevelcrypto
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import state
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from addresses import calculateInventoryHash, encodeVarint, decodeVarint, decodeAddress, varintDecodeError
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from bmconfigparser import BMConfigParser
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from debug import logger
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import defaults
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from helper_sql import sqlExecute
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import highlevelcrypto
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from inventory import Inventory
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from queues import objectProcessorQueue
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import state
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from version import softwareVersion
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# Service flags
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NODE_NETWORK = 1
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NODE_SSL = 2
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@ -52,7 +63,9 @@ VersionPacket = Struct('>LqQ20s4s36sH')
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# Bitfield
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def getBitfield(address):
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"""Get a bitfield from an address"""
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# bitfield of features supported by me (see the wiki).
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bitfield = 0
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# send ack
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@ -60,36 +73,42 @@ def getBitfield(address):
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bitfield |= BITFIELD_DOESACK
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return pack('>I', bitfield)
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def checkBitfield(bitfieldBinary, flags):
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"""Check if a bitfield matches the given flags"""
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bitfield, = unpack('>I', bitfieldBinary)
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return (bitfield & flags) == flags
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def isBitSetWithinBitfield(fourByteString, n):
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"""Check if a particular bit is set in a bitfeld"""
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# Uses MSB 0 bit numbering across 4 bytes of data
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n = 31 - n
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x, = unpack('>L', fourByteString)
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return x & 2**n != 0
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# ip addresses
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def encodeHost(host):
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"""Encode a given host to be used in low-level socket operations"""
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if host.find('.onion') > -1:
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return '\xfd\x87\xd8\x7e\xeb\x43' + base64.b32decode(host.split(".")[0], True)
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elif host.find(':') == -1:
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return '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF' + \
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socket.inet_aton(host)
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else:
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return socket.inet_pton(socket.AF_INET6, host)
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def networkType(host):
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"""Determine if a host is IPv4, IPv6 or an onion address"""
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if host.find('.onion') > -1:
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return 'onion'
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elif host.find(':') == -1:
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return 'IPv4'
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else:
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return 'IPv6'
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def checkIPAddress(host, private=False):
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"""Returns hostStandardFormat if it is a valid IP address, otherwise returns False"""
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if host[0:12] == '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF':
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hostStandardFormat = socket.inet_ntop(socket.AF_INET, host[12:])
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return checkIPv4Address(host[12:], hostStandardFormat, private)
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@ -110,51 +129,61 @@ def checkIPAddress(host, private=False):
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return False
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return checkIPv6Address(host, hostStandardFormat, private)
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def checkIPv4Address(host, hostStandardFormat, private=False):
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"""Returns hostStandardFormat if it is an IPv4 address, otherwise returns False"""
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if host[0] == '\x7F': # 127/8
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if not private:
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logger.debug('Ignoring IP address in loopback range: ' + hostStandardFormat)
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logger.debug('Ignoring IP address in loopback range: %s', hostStandardFormat)
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return hostStandardFormat if private else False
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if host[0] == '\x0A': # 10/8
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if not private:
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logger.debug('Ignoring IP address in private range: ' + hostStandardFormat)
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logger.debug('Ignoring IP address in private range: %s', hostStandardFormat)
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return hostStandardFormat if private else False
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if host[0:2] == '\xC0\xA8': # 192.168/16
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if not private:
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logger.debug('Ignoring IP address in private range: ' + hostStandardFormat)
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logger.debug('Ignoring IP address in private range: %s', hostStandardFormat)
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return hostStandardFormat if private else False
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if host[0:2] >= '\xAC\x10' and host[0:2] < '\xAC\x20': # 172.16/12
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if not private:
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logger.debug('Ignoring IP address in private range:' + hostStandardFormat)
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logger.debug('Ignoring IP address in private range: %s', hostStandardFormat)
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return hostStandardFormat if private else False
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return False if private else hostStandardFormat
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def checkIPv6Address(host, hostStandardFormat, private=False):
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"""Returns hostStandardFormat if it is an IPv6 address, otherwise returns False"""
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if host == ('\x00' * 15) + '\x01':
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if not private:
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logger.debug('Ignoring loopback address: ' + hostStandardFormat)
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logger.debug('Ignoring loopback address: %s', hostStandardFormat)
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return False
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if host[0] == '\xFE' and (ord(host[1]) & 0xc0) == 0x80:
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if not private:
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logger.debug ('Ignoring local address: ' + hostStandardFormat)
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logger.debug('Ignoring local address: %s', hostStandardFormat)
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return hostStandardFormat if private else False
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if (ord(host[0]) & 0xfe) == 0xfc:
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if not private:
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logger.debug ('Ignoring unique local address: ' + hostStandardFormat)
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logger.debug('Ignoring unique local address: %s', hostStandardFormat)
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return hostStandardFormat if private else False
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return False if private else hostStandardFormat
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# checks
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def haveSSL(server=False):
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# python < 2.7.9's ssl library does not support ECDSA server due to missing initialisation of available curves, but client works ok
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if server == False:
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"""
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Predicate to check if ECDSA server support is required and available
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python < 2.7.9's ssl library does not support ECDSA server due to
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missing initialisation of available curves, but client works ok
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"""
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if not server:
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return True
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elif sys.version_info >= (2, 7, 9):
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return True
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return False
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def checkSocksIP(host):
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"""Predicate to check if we're using a SOCKS proxy"""
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try:
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if state.socksIP is None or not state.socksIP:
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state.socksIP = socket.gethostbyname(BMConfigParser().get("bitmessagesettings", "sockshostname"))
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@ -166,6 +195,7 @@ def checkSocksIP(host):
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state.socksIP = BMConfigParser().get("bitmessagesettings", "sockshostname")
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return state.socksIP == host
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def isProofOfWorkSufficient(data,
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nonceTrialsPerByte=0,
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payloadLengthExtraBytes=0):
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@ -179,11 +209,13 @@ def isProofOfWorkSufficient(data,
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TTL = 300
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POW, = unpack('>Q', hashlib.sha512(hashlib.sha512(data[
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:8] + hashlib.sha512(data[8:]).digest()).digest()).digest()[0:8])
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return POW <= 2 ** 64 / (nonceTrialsPerByte*(len(data) + payloadLengthExtraBytes + ((TTL*(len(data)+payloadLengthExtraBytes))/(2 ** 16))))
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return POW <= 2 ** 64 / (nonceTrialsPerByte *
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(len(data) + payloadLengthExtraBytes +
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((TTL * (len(data) + payloadLengthExtraBytes)) / (2 ** 16))))
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# Packet creation
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def CreatePacket(command, payload=''):
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"""Construct and return a number of bytes from a payload"""
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payload_length = len(payload)
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checksum = hashlib.sha512(payload).digest()[0:4]
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@ -192,11 +224,14 @@ def CreatePacket(command, payload=''):
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b[Header.size:] = payload
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return bytes(b)
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def assembleVersionMessage(remoteHost, remotePort, participatingStreams, server=False, nodeid=None):
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"""Construct the payload of a version message, return the resultng bytes of running CreatePacket() on it"""
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payload = ''
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payload += pack('>L', 3) # protocol version.
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# bitflags of the services I offer.
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payload += pack('>q',
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payload += pack(
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'>q',
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NODE_NETWORK |
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(NODE_SSL if haveSSL(server) else 0) |
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(NODE_DANDELION if state.dandelion else 0)
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@ -213,18 +248,17 @@ def assembleVersionMessage(remoteHost, remotePort, participatingStreams, server
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payload += pack('>H', remotePort) # remote IPv6 and port
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# bitflags of the services I offer.
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payload += pack('>q',
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payload += pack(
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'>q',
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NODE_NETWORK |
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(NODE_SSL if haveSSL(server) else 0) |
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(NODE_DANDELION if state.dandelion else 0)
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)
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payload += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF' + pack(
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'>L', 2130706433) # = 127.0.0.1. This will be ignored by the remote host. The actual remote connected IP will be used.
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# we have a separate extPort and
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# incoming over clearnet or
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# outgoing through clearnet
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# = 127.0.0.1. This will be ignored by the remote host. The actual remote connected IP will be used.
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payload += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF' + pack('>L', 2130706433)
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# we have a separate extPort and incoming over clearnet or outgoing through clearnet
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if BMConfigParser().safeGetBoolean('bitmessagesettings', 'upnp') and state.extPort \
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and ((server and not checkSocksIP(remoteHost)) or \
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and ((server and not checkSocksIP(remoteHost)) or
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(BMConfigParser().get("bitmessagesettings", "socksproxytype") == "none" and not server)):
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payload += pack('>H', state.extPort)
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elif checkSocksIP(remoteHost) and server: # incoming connection over Tor
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@ -253,7 +287,9 @@ def assembleVersionMessage(remoteHost, remotePort, participatingStreams, server
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return CreatePacket('version', payload)
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def assembleErrorMessage(fatal=0, banTime=0, inventoryVector='', errorText=''):
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"""Construct the payload of an error message, return the resultng bytes of running CreatePacket() on it"""
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payload = encodeVarint(fatal)
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payload += encodeVarint(banTime)
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payload += encodeVarint(len(inventoryVector))
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@ -262,7 +298,6 @@ def assembleErrorMessage(fatal=0, banTime=0, inventoryVector='', errorText=''):
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payload += errorText
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return CreatePacket('error', payload)
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# Packet decoding
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def decryptAndCheckPubkeyPayload(data, address):
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"""
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@ -271,6 +306,7 @@ def decryptAndCheckPubkeyPayload(data, address):
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off of the wire or we might have had it already in our inventory when we tried
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to send a msg to this particular address.
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"""
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# pylint: disable=unused-variable
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try:
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status, addressVersion, streamNumber, ripe = decodeAddress(address)
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@ -279,7 +315,8 @@ def decryptAndCheckPubkeyPayload(data, address):
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readPosition += varintLength
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embeddedStreamNumber, varintLength = decodeVarint(data[readPosition:readPosition + 10])
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readPosition += varintLength
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storedData = data[20:readPosition] # We'll store the address version and stream number (and some more) in the pubkeys table.
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# We'll store the address version and stream number (and some more) in the pubkeys table.
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storedData = data[20:readPosition]
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if addressVersion != embeddedAddressVersion:
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logger.info('Pubkey decryption was UNsuccessful due to address version mismatch.')
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@ -290,15 +327,21 @@ def decryptAndCheckPubkeyPayload(data, address):
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tag = data[readPosition:readPosition + 32]
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readPosition += 32
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signedData = data[8:readPosition] # the time through the tag. More data is appended onto signedData below after the decryption.
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# the time through the tag. More data is appended onto signedData below after the decryption.
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signedData = data[8:readPosition]
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encryptedData = data[readPosition:]
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# Let us try to decrypt the pubkey
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toAddress, cryptorObject = state.neededPubkeys[tag]
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if toAddress != address:
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logger.critical('decryptAndCheckPubkeyPayload failed due to toAddress mismatch. This is very peculiar. toAddress: %s, address %s', toAddress, address)
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# the only way I can think that this could happen is if someone encodes their address data two different ways.
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# That sort of address-malleability should have been caught by the UI or API and an error given to the user.
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logger.critical(
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('decryptAndCheckPubkeyPayload failed due to toAddress mismatch. '
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'This is very peculiar. toAddress: %s, address %s'),
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toAddress,
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address)
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# the only way I can think that this could happen is if someone encodes their address data two different
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# ways. That sort of address-malleability should have been caught by the UI or API and an error given to
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# the user.
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return 'failed'
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try:
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decryptedData = cryptorObject.decrypt(encryptedData)
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@ -349,7 +392,8 @@ def decryptAndCheckPubkeyPayload(data, address):
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# Everything checked out. Insert it into the pubkeys table.
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logger.info('within decryptAndCheckPubkeyPayload, addressVersion: %s, streamNumber: %s \n\
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logger.info(
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'within decryptAndCheckPubkeyPayload, addressVersion: %s, streamNumber: %s \n\
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ripe %s\n\
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publicSigningKey in hex: %s\n\
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publicEncryptionKey in hex: %s', addressVersion,
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@ -362,13 +406,16 @@ def decryptAndCheckPubkeyPayload(data, address):
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t = (address, addressVersion, storedData, int(time.time()), 'yes')
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sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''', *t)
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return 'successful'
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except varintDecodeError as e:
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except varintDecodeError:
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logger.info('Pubkey decryption was UNsuccessful due to a malformed varint.')
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return 'failed'
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except Exception as e:
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logger.critical('Pubkey decryption was UNsuccessful because of an unhandled exception! This is definitely a bug! \n%s', traceback.format_exc())
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except Exception:
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logger.critical(
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'Pubkey decryption was UNsuccessful because of an unhandled exception! This is definitely a bug! \n%s',
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traceback.format_exc())
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return 'failed'
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def checkAndShareObjectWithPeers(data):
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"""
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This function is called after either receiving an object off of the wire
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@ -385,11 +432,14 @@ def checkAndShareObjectWithPeers(data):
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return 0
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endOfLifeTime, = unpack('>Q', data[8:16])
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if endOfLifeTime - int(time.time()) > 28 * 24 * 60 * 60 + 10800: # The TTL may not be larger than 28 days + 3 hours of wiggle room
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# The TTL may not be larger than 28 days + 3 hours of wiggle room
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if endOfLifeTime - int(time.time()) > 28 * 24 * 60 * 60 + 10800:
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logger.info('This object\'s End of Life time is too far in the future. Ignoring it. Time is %s', endOfLifeTime)
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return 0
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if endOfLifeTime - int(time.time()) < - 3600: # The EOL time was more than an hour ago. That's too much.
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logger.info('This object\'s End of Life time was more than an hour ago. Ignoring the object. Time is %s', endOfLifeTime)
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logger.info(
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'This object\'s End of Life time was more than an hour ago. Ignoring the object. Time is %s',
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endOfLifeTime)
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return 0
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intObjectType, = unpack('>I', data[16:20])
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try:
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@ -405,17 +455,23 @@ def checkAndShareObjectWithPeers(data):
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elif intObjectType == 3:
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_checkAndShareBroadcastWithPeers(data)
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return 0.6
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else:
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_checkAndShareUndefinedObjectWithPeers(data)
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return 0.6
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except varintDecodeError as e:
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logger.debug("There was a problem with a varint while checking to see whether it was appropriate to share an object with peers. Some details: %s", e)
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except Exception as e:
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logger.critical('There was a problem while checking to see whether it was appropriate to share an object with peers. This is definitely a bug! \n%s', traceback.format_exc())
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except varintDecodeError as err:
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logger.debug(
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("There was a problem with a varint while checking to see whether it was appropriate to share an object "
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"with peers. Some details: %s"),
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err)
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except Exception:
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logger.critical(
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('There was a problem while checking to see whether it was appropriate to share an object with peers. '
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'This is definitely a bug! \n%s'),
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traceback.format_exc())
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return 0
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def _checkAndShareUndefinedObjectWithPeers(data):
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# pylint: disable=unused-variable
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embeddedTime, = unpack('>Q', data[8:16])
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readPosition = 20 # bypass nonce, time, and object type
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objectVersion, objectVersionLength = decodeVarint(
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@ -423,7 +479,7 @@ def _checkAndShareUndefinedObjectWithPeers(data):
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readPosition += objectVersionLength
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streamNumber, streamNumberLength = decodeVarint(
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data[readPosition:readPosition + 9])
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if not streamNumber in state.streamsInWhichIAmParticipating:
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if streamNumber not in state.streamsInWhichIAmParticipating:
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logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
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return
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@ -441,12 +497,12 @@ def _checkAndShareUndefinedObjectWithPeers(data):
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def _checkAndShareMsgWithPeers(data):
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embeddedTime, = unpack('>Q', data[8:16])
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readPosition = 20 # bypass nonce, time, and object type
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objectVersion, objectVersionLength = decodeVarint(
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objectVersion, objectVersionLength = decodeVarint( # pylint: disable=unused-variable
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data[readPosition:readPosition + 9])
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readPosition += objectVersionLength
|
||||
streamNumber, streamNumberLength = decodeVarint(
|
||||
data[readPosition:readPosition + 9])
|
||||
if not streamNumber in state.streamsInWhichIAmParticipating:
|
||||
if streamNumber not in state.streamsInWhichIAmParticipating:
|
||||
logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
|
||||
return
|
||||
readPosition += streamNumberLength
|
||||
|
|
@ -464,7 +520,9 @@ def _checkAndShareMsgWithPeers(data):
|
|||
# Now let's enqueue it to be processed ourselves.
|
||||
objectProcessorQueue.put((objectType, data))
|
||||
|
||||
|
||||
def _checkAndShareGetpubkeyWithPeers(data):
|
||||
# pylint: disable=unused-variable
|
||||
if len(data) < 42:
|
||||
logger.info('getpubkey message doesn\'t contain enough data. Ignoring.')
|
||||
return
|
||||
|
|
@ -477,7 +535,7 @@ def _checkAndShareGetpubkeyWithPeers(data):
|
|||
readPosition += addressVersionLength
|
||||
streamNumber, streamNumberLength = decodeVarint(
|
||||
data[readPosition:readPosition + 10])
|
||||
if not streamNumber in state.streamsInWhichIAmParticipating:
|
||||
if streamNumber not in state.streamsInWhichIAmParticipating:
|
||||
logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
|
||||
return
|
||||
readPosition += streamNumberLength
|
||||
|
|
@ -497,6 +555,7 @@ def _checkAndShareGetpubkeyWithPeers(data):
|
|||
# Now let's queue it to be processed ourselves.
|
||||
objectProcessorQueue.put((objectType, data))
|
||||
|
||||
|
||||
def _checkAndSharePubkeyWithPeers(data):
|
||||
if len(data) < 146 or len(data) > 440: # sanity check
|
||||
return
|
||||
|
|
@ -508,7 +567,7 @@ def _checkAndSharePubkeyWithPeers(data):
|
|||
streamNumber, varintLength = decodeVarint(
|
||||
data[readPosition:readPosition + 10])
|
||||
readPosition += varintLength
|
||||
if not streamNumber in state.streamsInWhichIAmParticipating:
|
||||
if streamNumber not in state.streamsInWhichIAmParticipating:
|
||||
logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
|
||||
return
|
||||
if addressVersion >= 4:
|
||||
|
|
@ -528,14 +587,15 @@ def _checkAndSharePubkeyWithPeers(data):
|
|||
logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
|
||||
broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))
|
||||
|
||||
|
||||
# Now let's queue it to be processed ourselves.
|
||||
objectProcessorQueue.put((objectType, data))
|
||||
|
||||
|
||||
def _checkAndShareBroadcastWithPeers(data):
|
||||
if len(data) < 180:
|
||||
logger.debug('The payload length of this broadcast packet is unreasonably low. Someone is probably trying funny business. Ignoring message.')
|
||||
logger.debug(
|
||||
'The payload length of this broadcast packet is unreasonably low. '
|
||||
'Someone is probably trying funny business. Ignoring message.')
|
||||
return
|
||||
embeddedTime, = unpack('>Q', data[8:16])
|
||||
readPosition = 20 # bypass the nonce, time, and object type
|
||||
|
|
@ -545,7 +605,7 @@ def _checkAndShareBroadcastWithPeers(data):
|
|||
if broadcastVersion >= 2:
|
||||
streamNumber, streamNumberLength = decodeVarint(data[readPosition:readPosition + 10])
|
||||
readPosition += streamNumberLength
|
||||
if not streamNumber in state.streamsInWhichIAmParticipating:
|
||||
if streamNumber not in state.streamsInWhichIAmParticipating:
|
||||
logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
|
||||
return
|
||||
if broadcastVersion >= 3:
|
||||
|
|
@ -567,20 +627,23 @@ def _checkAndShareBroadcastWithPeers(data):
|
|||
# Now let's queue it to be processed ourselves.
|
||||
objectProcessorQueue.put((objectType, data))
|
||||
|
||||
# If you want to command all of the sendDataThreads to do something, like shutdown or send some data, this
|
||||
# function puts your data into the queues for each of the sendDataThreads. The sendDataThreads are
|
||||
# responsible for putting their queue into (and out of) the sendDataQueues list.
|
||||
|
||||
def broadcastToSendDataQueues(data):
|
||||
# logger.debug('running broadcastToSendDataQueues')
|
||||
"""
|
||||
If you want to command all of the sendDataThreads to do something, like shutdown or send some data, this
|
||||
function puts your data into the queues for each of the sendDataThreads. The sendDataThreads are
|
||||
responsible for putting their queue into (and out of) the sendDataQueues list.
|
||||
"""
|
||||
for q in state.sendDataQueues:
|
||||
q.put(data)
|
||||
|
||||
|
||||
# sslProtocolVersion
|
||||
if sys.version_info >= (2, 7, 13):
|
||||
# this means TLSv1 or higher
|
||||
# in the future change to
|
||||
# ssl.PROTOCOL_TLS1.2
|
||||
sslProtocolVersion = ssl.PROTOCOL_TLS
|
||||
sslProtocolVersion = ssl.PROTOCOL_TLS # pylint: disable=no-member
|
||||
elif sys.version_info >= (2, 7, 9):
|
||||
# this means any SSL/TLS. SSLv2 and 3 are excluded with an option after context is created
|
||||
sslProtocolVersion = ssl.PROTOCOL_SSLv23
|
||||
|
|
@ -589,6 +652,7 @@ else:
|
|||
# "TLSv1.2" in < 2.7.9
|
||||
sslProtocolVersion = ssl.PROTOCOL_TLSv1
|
||||
|
||||
|
||||
# ciphers
|
||||
if ssl.OPENSSL_VERSION_NUMBER >= 0x10100000 and not ssl.OPENSSL_VERSION.startswith("LibreSSL"):
|
||||
sslProtocolCiphers = "AECDH-AES256-SHA@SECLEVEL=0"
|
||||
|
|
|
|||
|
|
@ -1,4 +1,7 @@
|
|||
import hashlib, re
|
||||
# pylint: disable=missing-docstring,too-many-function-args
|
||||
|
||||
import hashlib
|
||||
import re
|
||||
|
||||
P = 2**256 - 2**32 - 2**9 - 2**8 - 2**7 - 2**6 - 2**4 - 1
|
||||
A = 0
|
||||
|
|
@ -6,6 +9,7 @@ Gx = 550662630222773436695787188951685343262506034537775941755001873603891167292
|
|||
Gy = 32670510020758816978083085130507043184471273380659243275938904335757337482424
|
||||
G = (Gx, Gy)
|
||||
|
||||
|
||||
def inv(a, n):
|
||||
lm, hm = 1, 0
|
||||
low, high = a % n, n
|
||||
|
|
@ -15,13 +19,21 @@ def inv(a,n):
|
|||
lm, low, hm, high = nm, new, lm, low
|
||||
return lm % n
|
||||
|
||||
|
||||
def get_code_string(base):
|
||||
if base == 2: return '01'
|
||||
elif base == 10: return '0123456789'
|
||||
elif base == 16: return "0123456789abcdef"
|
||||
elif base == 58: return "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
|
||||
elif base == 256: return ''.join([chr(x) for x in range(256)])
|
||||
else: raise ValueError("Invalid base!")
|
||||
if base == 2:
|
||||
return '01'
|
||||
elif base == 10:
|
||||
return '0123456789'
|
||||
elif base == 16:
|
||||
return "0123456789abcdef"
|
||||
elif base == 58:
|
||||
return "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
|
||||
elif base == 256:
|
||||
return ''.join([chr(x) for x in range(256)])
|
||||
else:
|
||||
raise ValueError("Invalid base!")
|
||||
|
||||
|
||||
def encode(val, base, minlen=0):
|
||||
code_string = get_code_string(base)
|
||||
|
|
@ -33,68 +45,92 @@ def encode(val,base,minlen=0):
|
|||
result = code_string[0] * (minlen - len(result)) + result
|
||||
return result
|
||||
|
||||
|
||||
def decode(string, base):
|
||||
code_string = get_code_string(base)
|
||||
result = 0
|
||||
if base == 16: string = string.lower()
|
||||
while len(string) > 0:
|
||||
if base == 16:
|
||||
string = string.lower()
|
||||
while string:
|
||||
result *= base
|
||||
result += code_string.find(string[0])
|
||||
string = string[1:]
|
||||
return result
|
||||
|
||||
|
||||
def changebase(string, frm, to, minlen=0):
|
||||
return encode(decode(string, frm), to, minlen)
|
||||
|
||||
|
||||
def base10_add(a, b):
|
||||
if a == None: return b[0],b[1]
|
||||
if b == None: return a[0],a[1]
|
||||
if a is None:
|
||||
return b[0], b[1]
|
||||
if b is None:
|
||||
return a[0], a[1]
|
||||
if a[0] == b[0]:
|
||||
if a[1] == b[1]: return base10_double(a[0],a[1])
|
||||
else: return None
|
||||
if a[1] == b[1]:
|
||||
return base10_double(a[0], a[1])
|
||||
return None
|
||||
m = ((b[1] - a[1]) * inv(b[0] - a[0], P)) % P
|
||||
x = (m * m - a[0] - b[0]) % P
|
||||
y = (m * (a[0] - x) - a[1]) % P
|
||||
return (x, y)
|
||||
|
||||
|
||||
def base10_double(a):
|
||||
if a == None: return None
|
||||
if a is None:
|
||||
return None
|
||||
m = ((3 * a[0] * a[0] + A) * inv(2 * a[1], P)) % P
|
||||
x = (m * m - 2 * a[0]) % P
|
||||
y = (m * (a[0] - x) - a[1]) % P
|
||||
return (x, y)
|
||||
|
||||
|
||||
def base10_multiply(a, n):
|
||||
if n == 0: return G
|
||||
if n == 1: return a
|
||||
if (n%2) == 0: return base10_double(base10_multiply(a,n/2))
|
||||
if (n%2) == 1: return base10_add(base10_double(base10_multiply(a,n/2)),a)
|
||||
if n == 0:
|
||||
return G
|
||||
if n == 1:
|
||||
return a
|
||||
if (n % 2) == 0:
|
||||
return base10_double(base10_multiply(a, n / 2))
|
||||
if (n % 2) == 1:
|
||||
return base10_add(base10_double(base10_multiply(a, n / 2)), a)
|
||||
return None
|
||||
|
||||
def hex_to_point(h): return (decode(h[2:66],16),decode(h[66:],16))
|
||||
|
||||
def point_to_hex(p): return '04'+encode(p[0],16,64)+encode(p[1],16,64)
|
||||
def hex_to_point(h):
|
||||
return (decode(h[2:66], 16), decode(h[66:], 16))
|
||||
|
||||
|
||||
def point_to_hex(p):
|
||||
return '04' + encode(p[0], 16, 64) + encode(p[1], 16, 64)
|
||||
|
||||
|
||||
def multiply(privkey, pubkey):
|
||||
return point_to_hex(base10_multiply(hex_to_point(pubkey), decode(privkey, 16)))
|
||||
|
||||
|
||||
def privtopub(privkey):
|
||||
return point_to_hex(base10_multiply(G, decode(privkey, 16)))
|
||||
|
||||
|
||||
def add(p1, p2):
|
||||
if (len(p1)==32):
|
||||
if len(p1) == 32:
|
||||
return encode(decode(p1, 16) + decode(p2, 16) % P, 16, 32)
|
||||
else:
|
||||
return point_to_hex(base10_add(hex_to_point(p1), hex_to_point(p2)))
|
||||
|
||||
|
||||
def hash_160(string):
|
||||
intermed = hashlib.sha256(string).digest()
|
||||
ripemd160 = hashlib.new('ripemd160')
|
||||
ripemd160.update(intermed)
|
||||
return ripemd160.digest()
|
||||
|
||||
|
||||
def dbl_sha256(string):
|
||||
return hashlib.sha256(hashlib.sha256(string).digest()).digest()
|
||||
|
||||
|
||||
def bin_to_b58check(inp):
|
||||
inp_fmtd = '\x00' + inp
|
||||
leadingzbytes = len(re.match('^\x00*', inp_fmtd).group(0))
|
||||
|
|
@ -102,5 +138,7 @@ def bin_to_b58check(inp):
|
|||
return '1' * leadingzbytes + changebase(inp_fmtd + checksum, 256, 58)
|
||||
|
||||
# Convert a public key (in hex) to a Bitcoin address
|
||||
|
||||
|
||||
def pubkey_to_address(pubkey):
|
||||
return bin_to_b58check(hash_160(changebase(pubkey, 16, 256)))
|
||||
|
|
|
|||
Loading…
Reference in New Issue