mmgen-wallet/mmgen-pywallet

#!/usr/bin/env python
#
# mmgen = Multi-Mode GENerator, command-line Bitcoin cold storage solution
# Copyright (C) 2013 by philemon <mmgen-py@yandex.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
"""
mmgen-pywallet: Dump contents of a bitcoind wallet to file
"""

# Changes by Philemon:
#   password entry at prompt
#   dump keys, addresses or keys for specified addresses (output in flat list)

# PyWallet 1.2.1 (Public Domain)
# http://github.com/joric/pywallet
# Most of the actual PyWallet code placed in the public domain.
# PyWallet includes portions of free software, listed below.

# BitcoinTools (wallet.dat handling code, MIT License)
# https://github.com/gavinandresen/bitcointools
# Copyright (c) 2010 Gavin Andresen

# python-ecdsa (EC_KEY implementation, MIT License)
# http://github.com/warner/python-ecdsa
# "python-ecdsa" Copyright (c) 2010 Brian Warner
# Portions written in 2005 by Peter Pearson and placed in the public domain.

# SlowAES (aes.py code, Apache 2 License)
# http://code.google.com/p/slowaes/
# Copyright (c) 2008, Josh Davis (http://www.josh-davis.org),
# Alex Martelli (http://www.aleax.it)
# Ported from C code written by Laurent Haan (http://www.progressive-coding.com)

from mmgen.Opts import *
from mmgen.util import msg
import mmgen.config as g
from bsddb.db import *
import sys, time
import json
import logging
import struct
import StringIO
import traceback
import socket
import types
import string
import exceptions
import hashlib
import random
import math

max_version = 60000
addrtype = 0
json_db = {}
private_keys = []
password = None

prog_name = sys.argv[0].split("/")[-1]

help_data = {
	'prog_name': prog_name,
	'desc':    "Dump contents of a bitcoind wallet to file",
	'usage':   "[opts] <bitcoind wallet file>",
	'options': """
-h, --help             Print this help message
-d, --outdir=       d  Specify an alternate directory 'd' for output
-e, --echo-passphrase  Display passphrase on screen upon entry
-j, --json             Dump wallet in json format
-k, --keys             Dump all private keys (flat list)
-a, --addrs            Dump all addresses (flat list)
-K, --keysforaddrs= f  Dump private keys for addresses listed in file 'f'
-P, --passwd-file=  f  Get passphrase from file 'f'
-S, --stdout           Dump to stdout rather than file
"""
}

opts,cmd_args = parse_opts(sys.argv,help_data)

if len(cmd_args) == 1:
	from mmgen.util import check_infile
	check_infile(cmd_args[0])
else:
	usage(help_data)

if ('json' not in opts and 'keys' not in opts
		and 'addrs' not in opts and 'keysforaddrs' not in opts):
			usage(help_data)


# from the SlowAES project, http://code.google.com/p/slowaes (aes.py)

def append_PKCS7_padding(s):
	"""return s padded to a multiple of 16-bytes by PKCS7 padding"""
	numpads = 16 - (len(s)%16)
	return s + numpads*chr(numpads)

def strip_PKCS7_padding(s):
	"""return s stripped of PKCS7 padding"""
	if len(s)%16 or not s:
		raise ValueError("String of len %d can't be PCKS7-padded" % len(s))
	numpads = ord(s[-1])
	if numpads > 16:
		raise ValueError("String ending with %r can't be PCKS7-padded" % s[-1])
	return s[:-numpads]

class AES(object):
	# valid key sizes
	keySize = dict(SIZE_128=16, SIZE_192=24, SIZE_256=32)

	# Rijndael S-box
	sbox =  [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67,
			0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59,
			0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7,
			0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1,
			0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05,
			0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83,
			0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29,
			0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b,
			0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa,
			0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c,
			0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc,
			0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec,
			0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19,
			0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee,
			0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49,
			0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
			0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4,
			0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6,
			0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70,
			0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9,
			0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e,
			0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1,
			0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0,
			0x54, 0xbb, 0x16]

	# Rijndael Inverted S-box
	rsbox = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3,
			0x9e, 0x81, 0xf3, 0xd7, 0xfb , 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f,
			0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb , 0x54,
			0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b,
			0x42, 0xfa, 0xc3, 0x4e , 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24,
			0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25 , 0x72, 0xf8,
			0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d,
			0x65, 0xb6, 0x92 , 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda,
			0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84 , 0x90, 0xd8, 0xab,
			0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3,
			0x45, 0x06 , 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1,
			0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b , 0x3a, 0x91, 0x11, 0x41,
			0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6,
			0x73 , 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9,
			0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e , 0x47, 0xf1, 0x1a, 0x71, 0x1d,
			0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b ,
			0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0,
			0xfe, 0x78, 0xcd, 0x5a, 0xf4 , 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07,
			0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f , 0x60,
			0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f,
			0x93, 0xc9, 0x9c, 0xef , 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5,
			0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61 , 0x17, 0x2b,
			0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55,
			0x21, 0x0c, 0x7d]

	def getSBoxValue(self,num):
		"""Retrieves a given S-Box Value"""
		return self.sbox[num]

	def getSBoxInvert(self,num):
		"""Retrieves a given Inverted S-Box Value"""
		return self.rsbox[num]

	def rotate(self, word):
		""" Rijndael's key schedule rotate operation.

		Rotate a word eight bits to the left: eg, rotate(1d2c3a4f) == 2c3a4f1d
		Word is an char list of size 4 (32 bits overall).
		"""
		return word[1:] + word[:1]

	# Rijndael Rcon
	Rcon = [0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,
			0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97,
			0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72,
			0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66,
			0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04,
			0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d,
			0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3,
			0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61,
			0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a,
			0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40,
			0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc,
			0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5,
			0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a,
			0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d,
			0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c,
			0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35,
			0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4,
			0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc,
			0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08,
			0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a,
			0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d,
			0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2,
			0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74,
			0xe8, 0xcb ]

	def getRconValue(self, num):
		"""Retrieves a given Rcon Value"""
		return self.Rcon[num]

	def core(self, word, iteration):
		"""Key schedule core."""
		# rotate the 32-bit word 8 bits to the left
		word = self.rotate(word)
		# apply S-Box substitution on all 4 parts of the 32-bit word
		for i in range(4):
			word[i] = self.getSBoxValue(word[i])
		# XOR the output of the rcon operation with i to the first part
		# (leftmost) only
		word[0] = word[0] ^ self.getRconValue(iteration)
		return word

	def expandKey(self, key, size, expandedKeySize):
		"""Rijndael's key expansion.

		Expands an 128,192,256 key into an 176,208,240 bytes key

		expandedKey is a char list of large enough size,
		key is the non-expanded key.
		"""
		# current expanded keySize, in bytes
		currentSize = 0
		rconIteration = 1
		expandedKey = [0] * expandedKeySize

		# set the 16, 24, 32 bytes of the expanded key to the input key
		for j in range(size):
			expandedKey[j] = key[j]
		currentSize += size

		while currentSize < expandedKeySize:
			# assign the previous 4 bytes to the temporary value t
			t = expandedKey[currentSize-4:currentSize]

			# every 16,24,32 bytes we apply the core schedule to t
			# and increment rconIteration afterwards
			if currentSize % size == 0:
				t = self.core(t, rconIteration)
				rconIteration += 1
			# For 256-bit keys, we add an extra sbox to the calculation
			if size == self.keySize["SIZE_256"] and ((currentSize % size) == 16):
				for l in range(4): t[l] = self.getSBoxValue(t[l])

			# We XOR t with the four-byte block 16,24,32 bytes before the new
			# expanded key.  This becomes the next four bytes in the expanded
			# key.
			for m in range(4):
				expandedKey[currentSize] = expandedKey[currentSize - size] ^ \
						t[m]
				currentSize += 1

		return expandedKey

	def addRoundKey(self, state, roundKey):
		"""Adds (XORs) the round key to the state."""
		for i in range(16):
			state[i] ^= roundKey[i]
		return state

	def createRoundKey(self, expandedKey, roundKeyPointer):
		"""Create a round key.
		Creates a round key from the given expanded key and the
		position within the expanded key.
		"""
		roundKey = [0] * 16
		for i in range(4):
			for j in range(4):
				roundKey[j*4+i] = expandedKey[roundKeyPointer + i*4 + j]
		return roundKey

	def galois_multiplication(self, a, b):
		"""Galois multiplication of 8 bit characters a and b."""
		p = 0
		for counter in range(8):
			if b & 1: p ^= a
			hi_bit_set = a & 0x80
			a <<= 1
			# keep a 8 bit
			a &= 0xFF
			if hi_bit_set:
				a ^= 0x1b
			b >>= 1
		return p

	#
	# substitute all the values from the state with the value in the SBox
	# using the state value as index for the SBox
	#
	def subBytes(self, state, isInv):
		if isInv: getter = self.getSBoxInvert
		else: getter = self.getSBoxValue
		for i in range(16): state[i] = getter(state[i])
		return state

	# iterate over the 4 rows and call shiftRow() with that row
	def shiftRows(self, state, isInv):
		for i in range(4):
			state = self.shiftRow(state, i*4, i, isInv)
		return state

	# each iteration shifts the row to the left by 1
	def shiftRow(self, state, statePointer, nbr, isInv):
		for i in range(nbr):
			if isInv:
				state[statePointer:statePointer+4] = \
						state[statePointer+3:statePointer+4] + \
						state[statePointer:statePointer+3]
			else:
				state[statePointer:statePointer+4] = \
						state[statePointer+1:statePointer+4] + \
						state[statePointer:statePointer+1]
		return state

	# galois multiplication of the 4x4 matrix
	def mixColumns(self, state, isInv):
		# iterate over the 4 columns
		for i in range(4):
			# construct one column by slicing over the 4 rows
			column = state[i:i+16:4]
			# apply the mixColumn on one column
			column = self.mixColumn(column, isInv)
			# put the values back into the state
			state[i:i+16:4] = column

		return state

	# galois multiplication of 1 column of the 4x4 matrix
	def mixColumn(self, column, isInv):
		if isInv: mult = [14, 9, 13, 11]
		else: mult = [2, 1, 1, 3]
		cpy = list(column)
		g = self.galois_multiplication

		column[0] = g(cpy[0], mult[0]) ^ g(cpy[3], mult[1]) ^ \
					g(cpy[2], mult[2]) ^ g(cpy[1], mult[3])
		column[1] = g(cpy[1], mult[0]) ^ g(cpy[0], mult[1]) ^ \
					g(cpy[3], mult[2]) ^ g(cpy[2], mult[3])
		column[2] = g(cpy[2], mult[0]) ^ g(cpy[1], mult[1]) ^ \
					g(cpy[0], mult[2]) ^ g(cpy[3], mult[3])
		column[3] = g(cpy[3], mult[0]) ^ g(cpy[2], mult[1]) ^ \
					g(cpy[1], mult[2]) ^ g(cpy[0], mult[3])
		return column

	# applies the 4 operations of the forward round in sequence
	def aes_round(self, state, roundKey):
		state = self.subBytes(state, False)
		state = self.shiftRows(state, False)
		state = self.mixColumns(state, False)
		state = self.addRoundKey(state, roundKey)
		return state

	# applies the 4 operations of the inverse round in sequence
	def aes_invRound(self, state, roundKey):
		state = self.shiftRows(state, True)
		state = self.subBytes(state, True)
		state = self.addRoundKey(state, roundKey)
		state = self.mixColumns(state, True)
		return state

	# Perform the initial operations, the standard round, and the final
	# operations of the forward aes, creating a round key for each round
	def aes_main(self, state, expandedKey, nbrRounds):
		state = self.addRoundKey(state, self.createRoundKey(expandedKey, 0))
		i = 1
		while i < nbrRounds:
			state = self.aes_round(state, self.createRoundKey(expandedKey, 16*i))
			i += 1
		state = self.subBytes(state, False)
		state = self.shiftRows(state, False)
		state = self.addRoundKey(state, self.createRoundKey(expandedKey, 16*nbrRounds))
		return state

	# Perform the initial operations, the standard round, and the final
	# operations of the inverse aes, creating a round key for each round
	def aes_invMain(self, state, expandedKey, nbrRounds):
		state = self.addRoundKey(state, self.createRoundKey(expandedKey, 16*nbrRounds))
		i = nbrRounds - 1
		while i > 0:
			state = self.aes_invRound(state, self.createRoundKey(expandedKey, 16*i))
			i -= 1
		state = self.shiftRows(state, True)
		state = self.subBytes(state, True)
		state = self.addRoundKey(state, self.createRoundKey(expandedKey, 0))
		return state

	# encrypts a 128 bit input block against the given key of size specified
	def encrypt(self, iput, key, size):
		output = [0] * 16
		# the number of rounds
		nbrRounds = 0
		# the 128 bit block to encode
		block = [0] * 16
		# set the number of rounds
		if size == self.keySize["SIZE_128"]: nbrRounds = 10
		elif size == self.keySize["SIZE_192"]: nbrRounds = 12
		elif size == self.keySize["SIZE_256"]: nbrRounds = 14
		else: return None

		# the expanded keySize
		expandedKeySize = 16*(nbrRounds+1)

		# Set the block values, for the block:
		# a0,0 a0,1 a0,2 a0,3
		# a1,0 a1,1 a1,2 a1,3
		# a2,0 a2,1 a2,2 a2,3
		# a3,0 a3,1 a3,2 a3,3
		# the mapping order is a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3
		#
		# iterate over the columns
		for i in range(4):
			# iterate over the rows
			for j in range(4):
				block[(i+(j*4))] = iput[(i*4)+j]

		# expand the key into an 176, 208, 240 bytes key
		# the expanded key
		expandedKey = self.expandKey(key, size, expandedKeySize)

		# encrypt the block using the expandedKey
		block = self.aes_main(block, expandedKey, nbrRounds)

		# unmap the block again into the output
		for k in range(4):
			# iterate over the rows
			for l in range(4):
				output[(k*4)+l] = block[(k+(l*4))]
		return output

	# decrypts a 128 bit input block against the given key of size specified
	def decrypt(self, iput, key, size):
		output = [0] * 16
		# the number of rounds
		nbrRounds = 0
		# the 128 bit block to decode
		block = [0] * 16
		# set the number of rounds
		if size == self.keySize["SIZE_128"]: nbrRounds = 10
		elif size == self.keySize["SIZE_192"]: nbrRounds = 12
		elif size == self.keySize["SIZE_256"]: nbrRounds = 14
		else: return None

		# the expanded keySize
		expandedKeySize = 16*(nbrRounds+1)

		# Set the block values, for the block:
		# a0,0 a0,1 a0,2 a0,3
		# a1,0 a1,1 a1,2 a1,3
		# a2,0 a2,1 a2,2 a2,3
		# a3,0 a3,1 a3,2 a3,3
		# the mapping order is a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3

		# iterate over the columns
		for i in range(4):
			# iterate over the rows
			for j in range(4):
				block[(i+(j*4))] = iput[(i*4)+j]
		# expand the key into an 176, 208, 240 bytes key
		expandedKey = self.expandKey(key, size, expandedKeySize)
		# decrypt the block using the expandedKey
		block = self.aes_invMain(block, expandedKey, nbrRounds)
		# unmap the block again into the output
		for k in range(4):
			# iterate over the rows
			for l in range(4):
				output[(k*4)+l] = block[(k+(l*4))]
		return output

class AESModeOfOperation(object):

	aes = AES()

	# structure of supported modes of operation
	modeOfOperation = dict(OFB=0, CFB=1, CBC=2)

	# converts a 16 character string into a number array
	def convertString(self, string, start, end, mode):
		if end - start > 16: end = start + 16
		if mode == self.modeOfOperation["CBC"]: ar = [0] * 16
		else: ar = []

		i = start
		j = 0
		while len(ar) < end - start:
			ar.append(0)
		while i < end:
			ar[j] = ord(string[i])
			j += 1
			i += 1
		return ar

	# Mode of Operation Encryption
	# stringIn - Input String
	# mode - mode of type modeOfOperation
	# hexKey - a hex key of the bit length size
	# size - the bit length of the key
	# hexIV - the 128 bit hex Initilization Vector
	def encrypt(self, stringIn, mode, key, size, IV):
		if len(key) % size:
			return None
		if len(IV) % 16:
			return None
		# the AES input/output
		plaintext = []
		iput = [0] * 16
		output = []
		ciphertext = [0] * 16
		# the output cipher string
		cipherOut = []
		# char firstRound
		firstRound = True
		if stringIn != None:
			for j in range(int(math.ceil(float(len(stringIn))/16))):
				start = j*16
				end = j*16+16
				if  end > len(stringIn):
					end = len(stringIn)
				plaintext = self.convertString(stringIn, start, end, mode)
				# print 'PT@%s:%s' % (j, plaintext)
				if mode == self.modeOfOperation["CFB"]:
					if firstRound:
						output = self.aes.encrypt(IV, key, size)
						firstRound = False
					else:
						output = self.aes.encrypt(iput, key, size)
					for i in range(16):
						if len(plaintext)-1 < i:
							ciphertext[i] = 0 ^ output[i]
						elif len(output)-1 < i:
							ciphertext[i] = plaintext[i] ^ 0
						elif len(plaintext)-1 < i and len(output) < i:
							ciphertext[i] = 0 ^ 0
						else:
							ciphertext[i] = plaintext[i] ^ output[i]
					for k in range(end-start):
						cipherOut.append(ciphertext[k])
					iput = ciphertext
				elif mode == self.modeOfOperation["OFB"]:
					if firstRound:
						output = self.aes.encrypt(IV, key, size)
						firstRound = False
					else:
						output = self.aes.encrypt(iput, key, size)
					for i in range(16):
						if len(plaintext)-1 < i:
							ciphertext[i] = 0 ^ output[i]
						elif len(output)-1 < i:
							ciphertext[i] = plaintext[i] ^ 0
						elif len(plaintext)-1 < i and len(output) < i:
							ciphertext[i] = 0 ^ 0
						else:
							ciphertext[i] = plaintext[i] ^ output[i]
					for k in range(end-start):
						cipherOut.append(ciphertext[k])
					iput = output
				elif mode == self.modeOfOperation["CBC"]:
					for i in range(16):
						if firstRound:
							iput[i] =  plaintext[i] ^ IV[i]
						else:
							iput[i] =  plaintext[i] ^ ciphertext[i]
					# print 'IP@%s:%s' % (j, iput)
					firstRound = False
					ciphertext = self.aes.encrypt(iput, key, size)
					# always 16 bytes because of the padding for CBC
					for k in range(16):
						cipherOut.append(ciphertext[k])
		return mode, len(stringIn), cipherOut

	# Mode of Operation Decryption
	# cipherIn - Encrypted String
	# originalsize - The unencrypted string length - required for CBC
	# mode - mode of type modeOfOperation
	# key - a number array of the bit length size
	# size - the bit length of the key
	# IV - the 128 bit number array Initilization Vector
	def decrypt(self, cipherIn, originalsize, mode, key, size, IV):
		# cipherIn = unescCtrlChars(cipherIn)
		if len(key) % size:
			return None
		if len(IV) % 16:
			return None
		# the AES input/output
		ciphertext = []
		iput = []
		output = []
		plaintext = [0] * 16
		# the output plain text string
		stringOut = ''
		# char firstRound
		firstRound = True
		if cipherIn != None:
			for j in range(int(math.ceil(float(len(cipherIn))/16))):
				start = j*16
				end = j*16+16
				if j*16+16 > len(cipherIn):
					end = len(cipherIn)
				ciphertext = cipherIn[start:end]
				if mode == self.modeOfOperation["CFB"]:
					if firstRound:
						output = self.aes.encrypt(IV, key, size)
						firstRound = False
					else:
						output = self.aes.encrypt(iput, key, size)
					for i in range(16):
						if len(output)-1 < i:
							plaintext[i] = 0 ^ ciphertext[i]
						elif len(ciphertext)-1 < i:
							plaintext[i] = output[i] ^ 0
						elif len(output)-1 < i and len(ciphertext) < i:
							plaintext[i] = 0 ^ 0
						else:
							plaintext[i] = output[i] ^ ciphertext[i]
					for k in range(end-start):
						stringOut += chr(plaintext[k])
					iput = ciphertext
				elif mode == self.modeOfOperation["OFB"]:
					if firstRound:
						output = self.aes.encrypt(IV, key, size)
						firstRound = False
					else:
						output = self.aes.encrypt(iput, key, size)
					for i in range(16):
						if len(output)-1 < i:
							plaintext[i] = 0 ^ ciphertext[i]
						elif len(ciphertext)-1 < i:
							plaintext[i] = output[i] ^ 0
						elif len(output)-1 < i and len(ciphertext) < i:
							plaintext[i] = 0 ^ 0
						else:
							plaintext[i] = output[i] ^ ciphertext[i]
					for k in range(end-start):
						stringOut += chr(plaintext[k])
					iput = output
				elif mode == self.modeOfOperation["CBC"]:
					output = self.aes.decrypt(ciphertext, key, size)
					for i in range(16):
						if firstRound:
							plaintext[i] = IV[i] ^ output[i]
						else:
							plaintext[i] = iput[i] ^ output[i]
					firstRound = False
					if originalsize is not None and originalsize < end:
						for k in range(originalsize-start):
							stringOut += chr(plaintext[k])
					else:
						for k in range(end-start):
							stringOut += chr(plaintext[k])
					iput = ciphertext
		return stringOut

# end of aes.py code

# pywallet crypter implementation

crypter = None

try:
	from Crypto.Cipher import AES
	crypter = 'pycrypto'
except:
	pass

class Crypter_pycrypto( object ):
	def SetKeyFromPassphrase(self, vKeyData, vSalt, nDerivIterations, nDerivationMethod):
		if nDerivationMethod != 0:
			return 0
		data = vKeyData + vSalt
		for i in xrange(nDerivIterations):
			data = hashlib.sha512(data).digest()
		self.SetKey(data[0:32])
		self.SetIV(data[32:32+16])
		return len(data)

	def SetKey(self, key):
		self.chKey = key

	def SetIV(self, iv):
		self.chIV = iv[0:16]

	def Encrypt(self, data):
		return AES.new(self.chKey,AES.MODE_CBC,self.chIV).encrypt(data)[0:32]

	def Decrypt(self, data):
		return AES.new(self.chKey,AES.MODE_CBC,self.chIV).decrypt(data)[0:32]

try:
	if not crypter:
		import ctypes
		import ctypes.util
		ssl = ctypes.cdll.LoadLibrary (ctypes.util.find_library ('ssl') or 'libeay32')
		crypter = 'ssl'
except:
	pass

class Crypter_ssl(object):
	def __init__(self):
		self.chKey = ctypes.create_string_buffer (32)
		self.chIV = ctypes.create_string_buffer (16)

	def SetKeyFromPassphrase(self, vKeyData, vSalt, nDerivIterations, nDerivationMethod):
		if nDerivationMethod != 0:
			return 0
		strKeyData = ctypes.create_string_buffer (vKeyData)
		chSalt = ctypes.create_string_buffer (vSalt)
		return ssl.EVP_BytesToKey(ssl.EVP_aes_256_cbc(), ssl.EVP_sha512(), chSalt, strKeyData,
			len(vKeyData), nDerivIterations, ctypes.byref(self.chKey), ctypes.byref(self.chIV))

	def SetKey(self, key):
		self.chKey = ctypes.create_string_buffer(key)

	def SetIV(self, iv):
		self.chIV = ctypes.create_string_buffer(iv)

	def Encrypt(self, data):
		buf = ctypes.create_string_buffer(len(data) + 16)
		written = ctypes.c_int(0)
		final = ctypes.c_int(0)
		ctx = ssl.EVP_CIPHER_CTX_new()
		ssl.EVP_CIPHER_CTX_init(ctx)
		ssl.EVP_EncryptInit_ex(ctx, ssl.EVP_aes_256_cbc(), None, self.chKey, self.chIV)
		ssl.EVP_EncryptUpdate(ctx, buf, ctypes.byref(written), data, len(data))
		output = buf.raw[:written.value]
		ssl.EVP_EncryptFinal_ex(ctx, buf, ctypes.byref(final))
		output += buf.raw[:final.value]
		return output

	def Decrypt(self, data):
		buf = ctypes.create_string_buffer(len(data) + 16)
		written = ctypes.c_int(0)
		final = ctypes.c_int(0)
		ctx = ssl.EVP_CIPHER_CTX_new()
		ssl.EVP_CIPHER_CTX_init(ctx)
		ssl.EVP_DecryptInit_ex(ctx, ssl.EVP_aes_256_cbc(), None, self.chKey, self.chIV)
		ssl.EVP_DecryptUpdate(ctx, buf, ctypes.byref(written), data, len(data))
		output = buf.raw[:written.value]
		ssl.EVP_DecryptFinal_ex(ctx, buf, ctypes.byref(final))
		output += buf.raw[:final.value]
		return output

class Crypter_pure(object):
	def __init__(self):
		self.m = AESModeOfOperation()
		self.cbc = self.m.modeOfOperation["CBC"]
		self.sz = self.m.aes.keySize["SIZE_256"]

	def SetKeyFromPassphrase(self, vKeyData, vSalt, nDerivIterations, nDerivationMethod):
		if nDerivationMethod != 0:
			return 0
		data = vKeyData + vSalt
		for i in xrange(nDerivIterations):
			data = hashlib.sha512(data).digest()
		self.SetKey(data[0:32])
		self.SetIV(data[32:32+16])
		return len(data)

	def SetKey(self, key):
		self.chKey = [ord(i) for i in key]

	def SetIV(self, iv):
		self.chIV = [ord(i) for i in iv]

	def Encrypt(self, data):
		mode, size, cypher = self.m.encrypt(data, self.cbc, self.chKey, self.sz, self.chIV)
		return ''.join(map(chr, cypher))

	def Decrypt(self, data):
		chData = [ord(i) for i in data]
		return self.m.decrypt(chData, self.sz, self.cbc, self.chKey, self.sz, self.chIV)

# secp256k1

_p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2FL
_r = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141L
_b = 0x0000000000000000000000000000000000000000000000000000000000000007L
_a = 0x0000000000000000000000000000000000000000000000000000000000000000L
_Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798L
_Gy = 0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8L

# python-ecdsa code (EC_KEY implementation)

class CurveFp( object ):
	def __init__( self, p, a, b ):
		self.__p = p
		self.__a = a
		self.__b = b

	def p( self ):
		return self.__p

	def a( self ):
		return self.__a

	def b( self ):
		return self.__b

	def contains_point( self, x, y ):
		return ( y * y - ( x * x * x + self.__a * x + self.__b ) ) % self.__p == 0

class Point( object ):
	def __init__( self, curve, x, y, order = None ):
		self.__curve = curve
		self.__x = x
		self.__y = y
		self.__order = order
		if self.__curve: assert self.__curve.contains_point( x, y )
		if order: assert self * order == INFINITY

	def __add__( self, other ):
		if other == INFINITY: return self
		if self == INFINITY: return other
		assert self.__curve == other.__curve
		if self.__x == other.__x:
			if ( self.__y + other.__y ) % self.__curve.p() == 0:
				return INFINITY
			else:
				return self.double()

		p = self.__curve.p()
		l = ( ( other.__y - self.__y ) * \
					inverse_mod( other.__x - self.__x, p ) ) % p
		x3 = ( l * l - self.__x - other.__x ) % p
		y3 = ( l * ( self.__x - x3 ) - self.__y ) % p
		return Point( self.__curve, x3, y3 )

	def __mul__( self, other ):
		def leftmost_bit( x ):
			assert x > 0
			result = 1L
			while result <= x: result = 2 * result
			return result / 2

		e = other
		if self.__order: e = e % self.__order
		if e == 0: return INFINITY
		if self == INFINITY: return INFINITY
		assert e > 0
		e3 = 3 * e
		negative_self = Point( self.__curve, self.__x, -self.__y, self.__order )
		i = leftmost_bit( e3 ) / 2
		result = self
		while i > 1:
			result = result.double()
			if ( e3 & i ) != 0 and ( e & i ) == 0: result = result + self
			if ( e3 & i ) == 0 and ( e & i ) != 0: result = result + negative_self
			i = i / 2
		return result

	def __rmul__( self, other ):
		return self * other

	def __str__( self ):
		if self == INFINITY: return "infinity"
		return "(%d,%d)" % ( self.__x, self.__y )

	def double( self ):
		if self == INFINITY:
			return INFINITY

		p = self.__curve.p()
		a = self.__curve.a()
		l = ( ( 3 * self.__x * self.__x + a ) * \
					inverse_mod( 2 * self.__y, p ) ) % p
		x3 = ( l * l - 2 * self.__x ) % p
		y3 = ( l * ( self.__x - x3 ) - self.__y ) % p
		return Point( self.__curve, x3, y3 )

	def x( self ):
		return self.__x

	def y( self ):
		return self.__y

	def curve( self ):
		return self.__curve

	def order( self ):
		return self.__order

INFINITY = Point( None, None, None )

def inverse_mod( a, m ):
	if a < 0 or m <= a: a = a % m
	c, d = a, m
	uc, vc, ud, vd = 1, 0, 0, 1
	while c != 0:
		q, c, d = divmod( d, c ) + ( c, )
		uc, vc, ud, vd = ud - q*uc, vd - q*vc, uc, vc
	assert d == 1
	if ud > 0: return ud
	else: return ud + m

class Signature( object ):
	def __init__( self, r, s ):
		self.r = r
		self.s = s

class Public_key( object ):
	def __init__( self, generator, point ):
		self.curve = generator.curve()
		self.generator = generator
		self.point = point
		n = generator.order()
		if not n:
			raise RuntimeError, "Generator point must have order."
		if not n * point == INFINITY:
			raise RuntimeError, "Generator point order is bad."
		if point.x() < 0 or n <= point.x() or point.y() < 0 or n <= point.y():
			raise RuntimeError, "Generator point has x or y out of range."

	def verifies( self, hash, signature ):
		G = self.generator
		n = G.order()
		r = signature.r
		s = signature.s
		if r < 1 or r > n-1: return False
		if s < 1 or s > n-1: return False
		c = inverse_mod( s, n )
		u1 = ( hash * c ) % n
		u2 = ( r * c ) % n
		xy = u1 * G + u2 * self.point
		v = xy.x() % n
		return v == r

class Private_key( object ):
	def __init__( self, public_key, secret_multiplier ):
		self.public_key = public_key
		self.secret_multiplier = secret_multiplier

	def der( self ):
		hex_der_key = '06052b8104000a30740201010420' + \
			'%064x' % self.secret_multiplier + \
			'a00706052b8104000aa14403420004' + \
			'%064x' % self.public_key.point.x() + \
			'%064x' % self.public_key.point.y()
		return hex_der_key.decode('hex')

	def sign( self, hash, random_k ):
		G = self.public_key.generator
		n = G.order()
		k = random_k % n
		p1 = k * G
		r = p1.x()
		if r == 0: raise RuntimeError, "amazingly unlucky random number r"
		s = ( inverse_mod( k, n ) * \
					( hash + ( self.secret_multiplier * r ) % n ) ) % n
		if s == 0: raise RuntimeError, "amazingly unlucky random number s"
		return Signature( r, s )

class EC_KEY(object):
	def __init__( self, secret ):
		curve = CurveFp( _p, _a, _b )
		generator = Point( curve, _Gx, _Gy, _r )
		self.pubkey = Public_key( generator, generator * secret )
		self.privkey = Private_key( self.pubkey, secret )
		self.secret = secret

# end of python-ecdsa code

# pywallet openssl private key implementation

def i2d_ECPrivateKey(pkey, compressed=False):
	if compressed:
		key = '3081d30201010420' + \
			'%064x' % pkey.secret + \
			'a081a53081a2020101302c06072a8648ce3d0101022100' + \
			'%064x' % _p + \
			'3006040100040107042102' + \
			'%064x' % _Gx + \
			'022100' + \
			'%064x' % _r + \
			'020101a124032200'
	else:
		key = '308201130201010420' + \
			'%064x' % pkey.secret + \
			'a081a53081a2020101302c06072a8648ce3d0101022100' + \
			'%064x' % _p + \
			'3006040100040107044104' + \
			'%064x' % _Gx + \
			'%064x' % _Gy + \
			'022100' + \
			'%064x' % _r + \
			'020101a144034200'

	return key.decode('hex') + i2o_ECPublicKey(pkey, compressed)

def i2o_ECPublicKey(pkey, compressed=False):
	# public keys are 65 bytes long (520 bits)
	# 0x04 + 32-byte X-coordinate + 32-byte Y-coordinate
	# 0x00 = point at infinity, 0x02 and 0x03 = compressed, 0x04 = uncompressed
	# compressed keys: <sign> <x> where <sign> is 0x02 if y is even and 0x03 if y is odd
	if compressed:
		if pkey.pubkey.point.y() & 1:
			key = '03' + '%064x' % pkey.pubkey.point.x()
		else:
			key = '02' + '%064x' % pkey.pubkey.point.x()
	else:
		key = '04' + \
			'%064x' % pkey.pubkey.point.x() + \
			'%064x' % pkey.pubkey.point.y()

	return key.decode('hex')

# bitcointools hashes and base58 implementation

def hash_160(public_key):
	md = hashlib.new('ripemd160')
	md.update(hashlib.sha256(public_key).digest())
	return md.digest()

def public_key_to_bc_address(public_key):
	h160 = hash_160(public_key)
	return hash_160_to_bc_address(h160)

def hash_160_to_bc_address(h160):
	vh160 = chr(addrtype) + h160
	h = Hash(vh160)
	addr = vh160 + h[0:4]
	return b58encode(addr)

def bc_address_to_hash_160(addr):
	bytes = b58decode(addr, 25)
	return bytes[1:21]

__b58chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
__b58base = len(__b58chars)

def b58encode(v):
	""" encode v, which is a string of bytes, to base58.
	"""

	long_value = 0L
	for (i, c) in enumerate(v[::-1]):
		long_value += (256**i) * ord(c)

	result = ''
	while long_value >= __b58base:
		div, mod = divmod(long_value, __b58base)
		result = __b58chars[mod] + result
		long_value = div
	result = __b58chars[long_value] + result

	# Bitcoin does a little leading-zero-compression:
	# leading 0-bytes in the input become leading-1s
	nPad = 0
	for c in v:
		if c == '\0': nPad += 1
		else: break

	return (__b58chars[0]*nPad) + result

def b58decode(v, length):
	""" decode v into a string of len bytes
	"""
	long_value = 0L
	for (i, c) in enumerate(v[::-1]):
		long_value += __b58chars.find(c) * (__b58base**i)

	result = ''
	while long_value >= 256:
		div, mod = divmod(long_value, 256)
		result = chr(mod) + result
		long_value = div
	result = chr(long_value) + result

	nPad = 0
	for c in v:
		if c == __b58chars[0]: nPad += 1
		else: break

	result = chr(0)*nPad + result
	if length is not None and len(result) != length:
		return None

	return result

# end of bitcointools base58 implementation


# address handling code

def Hash(data):
	return hashlib.sha256(hashlib.sha256(data).digest()).digest()

def EncodeBase58Check(secret):
	hash = Hash(secret)
	return b58encode(secret + hash[0:4])

def DecodeBase58Check(sec):
	vchRet = b58decode(sec, None)
	secret = vchRet[0:-4]
	csum = vchRet[-4:]
	hash = Hash(secret)
	cs32 = hash[0:4]
	if cs32 != csum:
		return None
	else:
		return secret

def PrivKeyToSecret(privkey):
	if len(privkey) == 279:
		return privkey[9:9+32]
	else:
		return privkey[8:8+32]

def SecretToASecret(secret, compressed=False):
	vchIn = chr((addrtype+128)&255) + secret
	if compressed: vchIn += '\01'
	return EncodeBase58Check(vchIn)

def ASecretToSecret(sec):
	vch = DecodeBase58Check(sec)
	if vch and vch[0] == chr((addrtype+128)&255):
		return vch[1:]
	else:
		return False

def regenerate_key(sec):
	b = ASecretToSecret(sec)
	if not b:
		return False
	b = b[0:32]
	secret = int('0x' + b.encode('hex'), 16)
	return EC_KEY(secret)

def GetPubKey(pkey, compressed=False):
	return i2o_ECPublicKey(pkey, compressed)

def GetPrivKey(pkey, compressed=False):
	return i2d_ECPrivateKey(pkey, compressed)

def GetSecret(pkey):
	return ('%064x' % pkey.secret).decode('hex')

def is_compressed(sec):
	b = ASecretToSecret(sec)
	return len(b) == 33

# bitcointools wallet.dat handling code

def create_env(db_dir):
	db_env = DBEnv(0)
	r = db_env.open(db_dir, (DB_CREATE|DB_INIT_LOCK|DB_INIT_LOG|DB_INIT_MPOOL|DB_INIT_TXN|DB_THREAD|DB_RECOVER))
	return db_env

def parse_CAddress(vds):
	d = {'ip':'0.0.0.0','port':0,'nTime': 0}
	try:
		d['nVersion'] = vds.read_int32()
		d['nTime'] = vds.read_uint32()
		d['nServices'] = vds.read_uint64()
		d['pchReserved'] = vds.read_bytes(12)
		d['ip'] = socket.inet_ntoa(vds.read_bytes(4))
		d['port'] = vds.read_uint16()
	except:
		pass
	return d

def deserialize_CAddress(d):
	return d['ip']+":"+str(d['port'])

def parse_BlockLocator(vds):
	d = { 'hashes' : [] }
	nHashes = vds.read_compact_size()
	for i in xrange(nHashes):
		d['hashes'].append(vds.read_bytes(32))
		return d

def deserialize_BlockLocator(d):
  result = "Block Locator top: "+d['hashes'][0][::-1].encode('hex_codec')
  return result

def parse_setting(setting, vds):
	if setting[0] == "f":    # flag (boolean) settings
		return str(vds.read_boolean())
	elif setting[0:4] == "addr": # CAddress
		d = parse_CAddress(vds)
		return deserialize_CAddress(d)
	elif setting == "nTransactionFee":
		return vds.read_int64()
	elif setting == "nLimitProcessors":
		return vds.read_int32()
	return 'unknown setting'

class SerializationError(Exception):
	""" Thrown when there's a problem deserializing or serializing """

class BCDataStream(object):
	def __init__(self):
		self.input = None
		self.read_cursor = 0

	def clear(self):
		self.input = None
		self.read_cursor = 0

	def write(self, bytes):    # Initialize with string of bytes
		if self.input is None:
			self.input = bytes
		else:
			self.input += bytes

	def map_file(self, file, start):    # Initialize with bytes from file
		self.input = mmap.mmap(file.fileno(), 0, access=mmap.ACCESS_READ)
		self.read_cursor = start
	def seek_file(self, position):
		self.read_cursor = position
	def close_file(self):
		self.input.close()

	def read_string(self):
		# Strings are encoded depending on length:
		# 0 to 252 :    1-byte-length followed by bytes (if any)
		# 253 to 65,535 : byte'253' 2-byte-length followed by bytes
		# 65,536 to 4,294,967,295 : byte '254' 4-byte-length followed by bytes
		# ... and the Bitcoin client is coded to understand:
		# greater than 4,294,967,295 : byte '255' 8-byte-length followed by bytes of string
		# ... but I don't think it actually handles any strings that big.
		if self.input is None:
			raise SerializationError("call write(bytes) before trying to deserialize")

		try:
			length = self.read_compact_size()
		except IndexError:
			raise SerializationError("attempt to read past end of buffer")

		return self.read_bytes(length)

	def write_string(self, string):
		# Length-encoded as with read-string
		self.write_compact_size(len(string))
		self.write(string)

	def read_bytes(self, length):
		try:
			result = self.input[self.read_cursor:self.read_cursor+length]
			self.read_cursor += length
			return result
		except IndexError:
			raise SerializationError("attempt to read past end of buffer")

		return ''

	def read_boolean(self): return self.read_bytes(1)[0] != chr(0)
	def read_int16(self): return self._read_num('<h')
	def read_uint16(self): return self._read_num('<H')
	def read_int32(self): return self._read_num('<i')
	def read_uint32(self): return self._read_num('<I')
	def read_int64(self): return self._read_num('<q')
	def read_uint64(self): return self._read_num('<Q')

	def write_boolean(self, val): return self.write(chr(1) if val else chr(0))
	def write_int16(self, val): return self._write_num('<h', val)
	def write_uint16(self, val): return self._write_num('<H', val)
	def write_int32(self, val): return self._write_num('<i', val)
	def write_uint32(self, val): return self._write_num('<I', val)
	def write_int64(self, val): return self._write_num('<q', val)
	def write_uint64(self, val): return self._write_num('<Q', val)

	def read_compact_size(self):
		size = ord(self.input[self.read_cursor])
		self.read_cursor += 1
		if size == 253:
			size = self._read_num('<H')
		elif size == 254:
			size = self._read_num('<I')
		elif size == 255:
			size = self._read_num('<Q')
		return size

	def write_compact_size(self, size):
		if size < 0:
			raise SerializationError("attempt to write size < 0")
		elif size < 253:
			self.write(chr(size))
		elif size < 2**16:
			self.write('\xfd')
			self._write_num('<H', size)
		elif size < 2**32:
			self.write('\xfe')
			self._write_num('<I', size)
		elif size < 2**64:
			self.write('\xff')
			self._write_num('<Q', size)

	def _read_num(self, format):
		(i,) = struct.unpack_from(format, self.input, self.read_cursor)
		self.read_cursor += struct.calcsize(format)
		return i

	def _write_num(self, format, num):
		s = struct.pack(format, num)
		self.write(s)

def open_wallet(db_env, db_file="wallet.dat", writable=False):
	db = DB(db_env)
	flags = DB_THREAD | (DB_CREATE if writable else DB_RDONLY)
	try:
		r = db.open(db_file, "main", DB_BTREE, flags)
	except DBError:
		r = True

	if r is not None:
		logging.error("Couldn't open " + db_file + "/main. Try quitting Bitcoin and running this again.")
		sys.exit(1)

	return db

def parse_wallet(db, item_callback):
	kds = BCDataStream()
	vds = BCDataStream()

	for (key, value) in db.items():
		d = { }

		kds.clear(); kds.write(key)
		vds.clear(); vds.write(value)

		type = kds.read_string()

		d["__key__"] = key
		d["__value__"] = value
		d["__type__"] = type

		try:
			if type == "tx":
				d["tx_id"] = kds.read_bytes(32)
			elif type == "name":
				d['hash'] = kds.read_string()
				d['name'] = vds.read_string()
			elif type == "version":
				d['version'] = vds.read_uint32()
			elif type == "minversion":
				d['minversion'] = vds.read_uint32()
			elif type == "setting":
				d['setting'] = kds.read_string()
				d['value'] = parse_setting(d['setting'], vds)
			elif type == "key":
				d['public_key'] = kds.read_bytes(kds.read_compact_size())
				d['private_key'] = vds.read_bytes(vds.read_compact_size())
			elif type == "wkey":
				d['public_key'] = kds.read_bytes(kds.read_compact_size())
				d['private_key'] = vds.read_bytes(vds.read_compact_size())
				d['created'] = vds.read_int64()
				d['expires'] = vds.read_int64()
				d['comment'] = vds.read_string()
			elif type == "ckey":
				d['public_key'] = kds.read_bytes(kds.read_compact_size())
				d['crypted_key'] = vds.read_bytes(vds.read_compact_size())
			elif type == "mkey":
				d['nID'] = kds.read_int32()
				d['crypted_key'] = vds.read_bytes(vds.read_compact_size())
				d['salt'] = vds.read_bytes(vds.read_compact_size())
				d['nDerivationMethod'] = vds.read_int32()
				d['nDeriveIterations'] = vds.read_int32()
				d['vchOtherDerivationParameters'] = vds.read_bytes(vds.read_compact_size())
			elif type == "defaultkey":
				d['key'] = vds.read_bytes(vds.read_compact_size())
			elif type == "pool":
				d['n'] = kds.read_int64()
				d['nVersion'] = vds.read_int32()
				d['nTime'] = vds.read_int64()
				d['public_key'] = vds.read_bytes(vds.read_compact_size())
			elif type == "acc":
				d['account'] = kds.read_string()
				d['nVersion'] = vds.read_int32()
				d['public_key'] = vds.read_bytes(vds.read_compact_size())
			elif type == "acentry":
				d['account'] = kds.read_string()
				d['n'] = kds.read_uint64()
				d['nVersion'] = vds.read_int32()
				d['nCreditDebit'] = vds.read_int64()
				d['nTime'] = vds.read_int64()
				d['otherAccount'] = vds.read_string()
				d['comment'] = vds.read_string()
			elif type == "bestblock":
				d['nVersion'] = vds.read_int32()
				d.update(parse_BlockLocator(vds))

			item_callback(type, d)

		except Exception, e:
			traceback.print_exc()
			print("ERROR parsing wallet.dat, type %s" % type)
			print("key data in hex: %s"%key.encode('hex_codec'))
			print("value data in hex: %s"%value.encode('hex_codec'))
			sys.exit(1)

def update_wallet(db, type, data):
	"""Write a single item to the wallet.
	db must be open with writable=True.
	type and data are the type code and data dictionary as parse_wallet would
	give to item_callback.
	data's __key__, __value__ and __type__ are ignored; only the primary data
	fields are used.
	"""
	d = data
	kds = BCDataStream()
	vds = BCDataStream()

	# Write the type code to the key
	kds.write_string(type)
	vds.write("")                         # Ensure there is something

	try:
		if type == "tx":
			raise NotImplementedError("Writing items of type 'tx'")
			kds.write(d['tx_id'])
		elif type == "name":
			kds.write_string(d['hash'])
			vds.write_string(d['name'])
		elif type == "version":
			vds.write_uint32(d['version'])
		elif type == "minversion":
			vds.write_uint32(d['minversion'])
		elif type == "setting":
			raise NotImplementedError("Writing items of type 'setting'")
			kds.write_string(d['setting'])
			#d['value'] = parse_setting(d['setting'], vds)
		elif type == "key":
			kds.write_string(d['public_key'])
			vds.write_string(d['private_key'])
		elif type == "wkey":
			kds.write_string(d['public_key'])
			vds.write_string(d['private_key'])
			vds.write_int64(d['created'])
			vds.write_int64(d['expires'])
			vds.write_string(d['comment'])
		elif type == "ckey":
			kds.write_string(d['public_key'])
			vds.write_string(d['crypted_key'])
		elif type == "defaultkey":
			vds.write_string(d['key'])
		elif type == "pool":
			kds.write_int64(d['n'])
			vds.write_int32(d['nVersion'])
			vds.write_int64(d['nTime'])
			vds.write_string(d['public_key'])
		elif type == "acc":
			kds.write_string(d['account'])
			vds.write_int32(d['nVersion'])
			vds.write_string(d['public_key'])
		elif type == "acentry":
			kds.write_string(d['account'])
			kds.write_uint64(d['n'])
			vds.write_int32(d['nVersion'])
			vds.write_int64(d['nCreditDebit'])
			vds.write_int64(d['nTime'])
			vds.write_string(d['otherAccount'])
			vds.write_string(d['comment'])
		elif type == "bestblock":
			vds.write_int32(d['nVersion'])
			vds.write_compact_size(len(d['hashes']))
			for h in d['hashes']:
				vds.write(h)
		else:
			print "Unknown key type: "+type

		# Write the key/value pair to the database
		db.put(kds.input, vds.input)

	except Exception, e:
		print("ERROR writing to wallet.dat, type %s"%type)
		print("data dictionary: %r"%data)
		traceback.print_exc()


def read_wallet(json_db, db_env, db_file, print_wallet, print_wallet_transactions, transaction_filter):

	db = open_wallet(db_env, db_file)

	json_db['keys'] = []
	json_db['pool'] = []
	json_db['names'] = {}

	def item_callback(type, d):

		global password

		if type == "name":
			json_db['names'][d['hash']] = d['name']

		elif type == "version":
			json_db['version'] = d['version']

		elif type == "minversion":
			json_db['minversion'] = d['minversion']

		elif type == "setting":
			if not json_db.has_key('settings'): json_db['settings'] = {}
			json_db["settings"][d['setting']] = d['value']

		elif type == "defaultkey":
			json_db['defaultkey'] = public_key_to_bc_address(d['key'])

		elif type == "key":
			addr = public_key_to_bc_address(d['public_key'])
			compressed = d['public_key'][0] != '\04'
			sec = SecretToASecret(PrivKeyToSecret(d['private_key']), compressed)
			private_keys.append(sec)
			json_db['keys'].append({'addr' : addr, 'sec' : sec})
#            json_db['keys'].append({'addr' : addr, 'sec' : sec,
#                'secret':PrivKeyToSecret(d['private_key']).encode('hex'),
#                'pubkey':d['public_key'].encode('hex'),
#                'privkey':d['private_key'].encode('hex')})

		elif type == "wkey":
			if not json_db.has_key('wkey'): json_db['wkey'] = []
			json_db['wkey']['created'] = d['created']

		elif type == "ckey":
			addr = public_key_to_bc_address(d['public_key'])
			ckey = d['crypted_key']
			pubkey = d['public_key']
			json_db['keys'].append( {'addr' : addr, 'ckey': ckey.encode('hex'), 'pubkey': pubkey.encode('hex') })

		elif type == "mkey":
			mkey = {}
			mkey['nID'] = d['nID']
			mkey['crypted_key'] = d['crypted_key'].encode('hex')
			mkey['salt'] = d['salt'].encode('hex')
			mkey['nDeriveIterations'] = d['nDeriveIterations']
			mkey['nDerivationMethod'] = d['nDerivationMethod']
			mkey['vchOtherDerivationParameters'] = d['vchOtherDerivationParameters'].encode('hex')
			json_db['mkey'] = mkey

			if password == None and \
				('json' in opts or 'keysforaddrs' in opts or 'keys' in opts):
				from mmgen.util import get_bitcoind_passphrase
				password = get_bitcoind_passphrase("Enter password: ",opts)

			if password != None:
				global crypter
				if crypter == 'pycrypto':
					crypter = Crypter_pycrypto()
				elif crypter == 'ssl':
					crypter = Crypter_ssl()
				else:
					crypter = Crypter_pure()
					logging.warning("pycrypto or libssl not found, decryption may be slow")
				res = crypter.SetKeyFromPassphrase(password, d['salt'], d['nDeriveIterations'], d['nDerivationMethod'])
				if res == 0:
					logging.error("Unsupported derivation method")
					sys.exit(1)
				masterkey = crypter.Decrypt(d['crypted_key'])
				crypter.SetKey(masterkey)

		elif type == "pool":
			json_db['pool'].append( {'n': d['n'], 'addr': public_key_to_bc_address(d['public_key']), 'nTime' : d['nTime'] } )

		elif type == "acc":
			json_db['acc'] = d['account']
#			msg("Account %s (current key: %s)"%(d['account'], public_key_to_bc_address(d['public_key'])))

		elif type == "acentry":
			json_db['acentry'] = (d['account'], d['nCreditDebit'], d['otherAccount'], time.ctime(d['nTime']), d['n'], d['comment'])

		elif type == "bestblock":
			json_db['bestblock'] = d['hashes'][0][::-1].encode('hex_codec')

		else:
			json_db[type] = 'unsupported'

	parse_wallet(db, item_callback)

	db.close()

	for k in json_db['keys']:
		addr = k['addr']
		if addr in json_db['names'].keys():
			k["label"] = json_db['names'][addr]
		else:
			k["reserve"] = 1

	if 'mkey' in json_db.keys() and password != None:
		check = True
		for k in json_db['keys']:
			ckey = k['ckey'].decode('hex')
			public_key = k['pubkey'].decode('hex')
			crypter.SetIV(Hash(public_key))
			secret = crypter.Decrypt(ckey)
			compressed = public_key[0] != '\04'

			if check:
				check = False
				pkey = EC_KEY(int('0x' + secret.encode('hex'), 16))
				if public_key != GetPubKey(pkey, compressed):
					logging.error("wrong password")
					sys.exit(1)

			sec = SecretToASecret(secret, compressed)
			k['sec'] = sec
			k['secret'] = secret.encode('hex')
			del(k['ckey'])
			del(k['secret'])
			del(k['pubkey'])
			private_keys.append(sec)

	del(json_db['pool'])
	del(json_db['names'])


# Non-portable.  For Windows, works only if supplied filename is in current dir

# main()

import os.path
infile = os.path.abspath(cmd_args[0])
db_dir,db_file = os.path.dirname(infile),os.path.basename(infile)

#	print "[%s] [%s]" % (db_dir,db_file)

db_env = create_env(db_dir)

read_wallet(json_db, db_env, db_file, True, True, "")

if json_db.get('minversion') > max_version:
	print "Version mismatch (must be <= %d)" % max_version
	exit(1)

wallet_addrs = [i['addr'] for i in json_db['keys']]

if 'json' in opts:
	data = [json.dumps(json_db, sort_keys=True, indent=4)]
	ext,what = "json","json dump"

elif 'keys' in opts:
	data = sorted([i['sec'] for i in json_db['keys']])
	ext,what = "keys","private keys"

elif 'addrs' in opts:
	data = sorted([i['addr'] for i in json_db['keys']])
	ext,what = "addrs","addresses"

elif 'keysforaddrs' in opts:
	from mmgen.util import get_lines_from_file
	usr_addrs = set(get_lines_from_file(opts['keysforaddrs'],"addresses",remove_comments=True))
	data = [i['sec'] for i in json_db['keys'] if i['addr'] in usr_addrs]
	ext,what = "keys","private keys"
	if len(data) < len(usr_addrs):
		msg("Warning: not all requested keys found")

len_arg = "%s" % len(wallet_addrs) \
   if len(data) == len(wallet_addrs) or ext == "json" \
   else "%s:%s" % (len(data),len(wallet_addrs))

from mmgen.util import make_chksum_8,write_walletdat_dump_to_file,write_to_stdout
wallet_id = make_chksum_8(str(sorted(wallet_addrs)))

data = "\n".join(data) + "\n"

# Output data
if 'stdout' in opts:
	confirm = False if 'addrs' in opts else True
	write_to_stdout(data,"secret keys",confirm)
elif not sys.stdout.isatty():
	write_to_stdout(data,"secret keys",confirm=False)
else:
	write_walletdat_dump_to_file(wallet_id, data, len_arg, ext, what, opts)