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#!/bin/python | |
# Calculate address from public key according to http://www.multichain.com/developers/address-key-format/ | |
import asn1 | |
import base58 | |
import base64 | |
import binascii | |
import hashlib | |
import os | |
import sys | |
from pypassport import epassport, reader | |
from pypassport import fingerPrint | |
from pypassport.doc9303 import converter | |
from ecdsa import VerifyingKey, BRAINPOOLP320r1 | |
from pyasn1.codec.der.decoder import decode | |
from pyasn1.type import univ, namedtype | |
sys.dont_write_bytecode = True | |
def main(): | |
r = reader.ReaderManager().waitForCard(10) | |
MRZ = "" # enter last line of MRZ here | |
ep = epassport.EPassport(r, MRZ) | |
ep.doBasicAccessControl() | |
public = ep._getDG(15).body | |
received_record, rest_of_substrate = decode(public) | |
bitList = received_record.__getitem__(1) | |
bits = '' | |
for x in bitList: | |
bits = bits + str(x) | |
# step 2 | |
pubkey = hex(int(bits, 2))[3:-1] | |
print "The multichain address of document " + MRZ[:9] + " is " + pubkeyToAddress(pubkey) | |
def pubkeyToAddress(pubkey): | |
# Taken from params.dat | |
version = ['00','8c','b5','d6'] | |
# version = ['00','af','ea','21'] | |
addressChecksum = '5afce7b2' | |
# addressChecksum = '953abc69' | |
# step 3 | |
pubkeyHash = hashlib.sha256(binascii.unhexlify(pubkey)) | |
h = hashlib.new('ripemd160') | |
h.update(pubkeyHash.digest()) | |
# step 4 | |
pubkey160Hash = h.hexdigest() | |
# step 5 | |
pubkey160HashWithVersion = '' | |
for x in range(4): | |
pubkey160HashWithVersion = pubkey160HashWithVersion + version[x] + pubkey160Hash[(x*10):(x*10)+10] | |
# step 6 | |
sha256of160hash = hashlib.sha256(binascii.unhexlify(pubkey160HashWithVersion)) | |
sha256of160hash.hexdigest() | |
# step 7 | |
sha256ofPrevSha256 = hashlib.sha256(sha256of160hash.digest()) | |
# step 8 | |
checksum = sha256ofPrevSha256.hexdigest()[0:8] | |
# step 9 | |
xorChecksum = '{:08x}'.format(int(int(checksum, 16) ^ int(addressChecksum, 16))) | |
# step 10 | |
binaryAddress = pubkey160HashWithVersion + xorChecksum | |
# step 11 | |
return base58.b58encode(binascii.unhexlify(binaryAddress)) | |
if __name__ == "__main__": | |
main() |
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