diff --git a/MANIFEST b/MANIFEST
index 8b5f2cf8..c231ce0f 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -30,6 +30,7 @@ mmgen/rpc/proxy.py
 mmgen/rpc/util.py
 scripts/bitcoind-walletunlock.py
 scripts/deinstall.sh
+scripts/pywallet.py
 tests/addr.py
 tests/bitcoin.py
 tests/mn_electrum.py
diff --git a/mmgen-txcreate b/mmgen-txcreate
index d1782331..01af238e 100755
--- a/mmgen-txcreate
+++ b/mmgen-txcreate
@@ -16,7 +16,7 @@
 # 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-txcreate: Send BTC to specified addresses
+mmgen-txcreate: Create a BTC transaction, sending to specified addresses
 """
 
 import sys
@@ -33,7 +33,7 @@ prog_name = sys.argv[0].split("/")[-1]
 
 help_data = {
 	'prog_name': prog_name,
-	'desc':    "Send BTC to specified addresses",
+	'desc':    "Create a BTC transaction, sending to specified addresses",
 	'usage':   "[opts] <address:amount>[,...] <transaction fee> <change address>",
 	'options': """
 -h, --help                Print this help message
diff --git a/mmgen/tx.py b/mmgen/tx.py
index 7e0623be..308112f7 100755
--- a/mmgen/tx.py
+++ b/mmgen/tx.py
@@ -224,9 +224,14 @@ View options: [g]roup, show [m]mgen addr
 			elif reply == 'g': group = False if group else True; break
 			elif reply == 'm': mmaddr = False if mmaddr else True; break
 			elif reply == 'p':
-				f = "listunspent.out"
-				write_to_file(f,"\n".join(output)+"\n")
-				msg("\nData written to '%s'" % f)
+				outfile = "listunspent.out"
+				o = "Date: {} UTC\n\n{}\n\nTotal BTC: {}\n".format(
+						make_timestr(),
+						"\n".join(output),
+						trim_exponent(sum([i.amount for i in unspent]))
+					)
+				write_to_file(outfile, o)
+				msg("\nData written to '%s'" % outfile)
 				sys.exit(1)
 			elif reply == 'q': break
 			else: msg("Invalid input")
diff --git a/mmgen/utils.py b/mmgen/utils.py
index 0a6c3687..54c4f170 100755
--- a/mmgen/utils.py
+++ b/mmgen/utils.py
@@ -516,6 +516,11 @@ def make_timestamp():
 	tv = time.gmtime(time.time())[:6]
 	return "{:04d}{:02d}{:02d}_{:02d}{:02d}{:02d}".format(*tv)
 
+def make_timestr():
+	import time
+	tv = time.gmtime(time.time())[:6]
+	return "{:04d}/{:02d}/{:02d} {:02d}:{:02d}:{:02d}".format(*tv)
+
 def write_wallet_to_file(seed, passwd, key_id, salt, enc_seed, opts):
 
 	seed_id = make_chksum_8(seed)
diff --git a/scripts/pywallet.py b/scripts/pywallet.py
new file mode 100755
index 00000000..dfb2c539
--- /dev/null
+++ b/scripts/pywallet.py
@@ -0,0 +1,1755 @@
+#!/usr/bin/env python
+
+# 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.utils import msg
+from bsddb.db import *
+import os, 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
+
+# def determine_db_dir():
+# 	import os
+# 	import os.path
+# 	import platform
+# 	if platform.system() == "Darwin":
+# 		return os.path.expanduser("~/Library/Application Support/Bitcoin/")
+# 	elif platform.system() == "Windows":
+# 		return os.path.join(os.environ['APPDATA'], "Bitcoin")
+# 	return os.path.expanduser("~/.bitcoin")
+
+# 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 rewrite_wallet(db_env, destFileName, pre_put_callback=None):
+# 	db = open_wallet(db_env)
+#
+# 	db_out = DB(db_env)
+# 	try:
+# 		r = db_out.open(destFileName, "main", DB_BTREE, DB_CREATE)
+# 	except DBError:
+# 		r = True
+#
+# 	if r is not None:
+# 		logging.error("Couldn't open %s."%destFileName)
+# 		sys.exit(1)
+#
+# 	def item_callback(type, d):
+# 		if (pre_put_callback is None or pre_put_callback(type, d)):
+# 			db_out.put(d["__key__"], d["__value__"])
+#
+# 	parse_wallet(db, item_callback)
+# 	db_out.close()
+# 	db.close()
+#
+# end of bitcointools wallet.dat handling code
+
+# wallet.dat reader / writer
+
+def read_wallet(json_db, db_env, db_file, print_wallet, print_wallet_transactions, transaction_filter):
+	global password
+
+	db = open_wallet(db_env, db_file)
+
+	json_db['keys'] = []
+	json_db['pool'] = []
+	json_db['names'] = {}
+
+	def item_callback(type, d):
+
+		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:
+				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
+
+	crypted = 'mkey' in json_db.keys()
+
+	if (crypted and not password) and \
+			(options.dump or options.keysforaddrs or options.privkeys):
+		print("Encrypted wallet.  Specify '--password' to decrypt")
+		sys.exit(1)
+
+	if crypted and password:
+		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'])
+
+def importprivkey(db, sec):
+
+	pkey = regenerate_key(sec)
+	if not pkey:
+		return False
+
+	compressed = is_compressed(sec)
+
+	secret = GetSecret(pkey)
+	private_key = GetPrivKey(pkey, compressed)
+	public_key = GetPubKey(pkey, compressed)
+	addr = public_key_to_bc_address(public_key)
+
+	print "Address: %s" % addr
+	print "Privkey: %s" % SecretToASecret(secret, compressed)
+
+	global crypter, password, json_db
+
+	crypted = 'mkey' in json_db.keys()
+
+	if crypted:
+		if password:
+			crypter.SetIV(Hash(public_key))
+			crypted_key = crypter.Encrypt(secret)
+			update_wallet(db, 'ckey', { 'public_key' : public_key, 'crypted_key' : crypted_key })
+			update_wallet(db, 'name', { 'hash' : addr, 'name' : '' })
+			return True
+		else:
+			logging.error("password not specified")
+			sys.exit(1)
+	else:
+		update_wallet(db, 'key', { 'public_key' : public_key, 'private_key' : private_key })
+		update_wallet(db, 'name', { 'hash' : addr, 'name' : '' })
+		return True
+
+	return False
+
+
+def parse_wallet_file_arg(path):
+
+	import os
+	try:
+		os.stat(path)
+	except:
+		print "File '%s' does not exist" % path
+		sys.exit(1)
+
+	s = path.rfind("/")
+
+	if path[0] == '/':
+		if s == 0:
+			return "/", path
+		else:
+			return path[0:s], path[s+1:]
+	else:
+		curdir = os.path.abspath(".")
+		if s == -1:
+			return curdir,path
+		else:
+			return curdir + "/" + path[0:s], path[s+1:]
+
+
+from optparse import OptionParser
+def main():
+
+	global max_version, addrtype
+
+	parser = OptionParser(usage="%prog [options] walletfile", version="%prog 1.2")
+
+	parser.add_option("--dumpwallet", dest="dump", action="store_true",
+		help="dump wallet in json format")
+
+	parser.add_option("--privkeys", dest="privkeys", action="store_true",
+		help="dump all private keys in wallet (flat list)")
+
+	parser.add_option("--addrs", dest="addrs", action="store_true",
+		help="dump all addresses in wallet (flat list)")
+
+	parser.add_option("--keysforaddrs", dest="keysforaddrs",
+		help="dump all private keys corresponding to addresses in file KEYSFORADDRS (flat list)")
+
+	parser.add_option("--importprivkey", dest="key",
+		help="import private key from vanitygen")
+
+	parser.add_option("--testnet", dest="testnet", action="store_true",
+		help="use testnet subdirectory and address type")
+
+	parser.add_option("--password", dest="password", action="store_true",
+		help="prompt for password for the encrypted wallet")
+
+	global options
+
+	(options, args) = parser.parse_args()
+
+	if options.dump is None and options.key is None \
+		and options.keysforaddrs is None \
+		and options.addrs is None and options.privkeys is None:
+		print "A mandatory option is missing\n"
+		parser.print_help()
+		sys.exit(1)
+
+	db_dir,db_file = parse_wallet_file_arg(args[0])
+#	print "[%s] [%s]" % (db_dir,db_file)
+#	sys.exit()
+
+	if options.testnet: addrtype = 111
+
+	db_env = create_env(db_dir)
+
+	global password
+
+	if options.password:
+		from mmgen.utils import my_getpass
+		password = my_getpass("Enter password: ")
+
+	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)
+
+	if options.dump:
+		print json.dumps(json_db, sort_keys=True, indent=4)
+
+	elif options.privkeys:
+		for i in json_db['keys']:
+			print i['sec']
+
+	elif options.addrs:
+		for i in json_db['keys']:
+			print i['addr']
+
+	elif options.keysforaddrs:
+		from mmgen.utils import get_lines_from_file
+		addrs = get_lines_from_file(options.keysforaddrs,"addresses")
+		for i in json_db['keys']:
+			if i['addr'] in addrs:
+				print i['sec']
+
+	elif options.key:
+		if options.key in private_keys:
+			print "Already exists"
+		else:
+			db = open_wallet(db_env, db_file, writable=True)
+
+			if importprivkey(db, options.key):
+				print "Imported successfully"
+			else:
+				print "Bad private key"
+
+			db.close()
+
+if __name__ == '__main__':
+	main()
diff --git a/setup.py b/setup.py
index 7bc12976..9eb26469 100755
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@ from distutils.core import setup
 
 setup(
 		name         = 'mmgen',
-		version      = '0.6.3',
+		version      = '0.6.4',
 		author       = 'Philemon',
 		author_email = 'mmgen-py@yandex.com',
 		url          = 'https://github.com/mmgen/mmgen',
@@ -51,6 +51,7 @@ setup(
 		])],
 		scripts=[
 			'scripts/bitcoind-walletunlock.py',
+			'scripts/pywallet.py',
 			'scripts/deinstall.sh'
 		]
 	)