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AddressGeneration.py
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AddressGeneration.py
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# This script generate addresses for all the blockchain we have chosen to examine
# (Bitcoin, Ethereum, Litecoin, Dogecoin, Bitcoin Cash, Dash, Zcash)
from ecdsa import SigningKey, SECP256k1
import sha3
from binascii import unhexlify
import hashlib
from base58 import b58encode
import bech32
from cashaddress import convert
import datetime
# Computation of the private keys in the subgroup (see the paper for more details)
def PrivateKeyComputation(p1: int, p2: int, p3: int, base: int, n: int):
order = (2 ** 6) * 3 * 149 * 631 * p1 * p2 * p3
prod = p1 * p2 * p3
g = pow(base, prod, order + 1)
privateSet = [None] * n
for i in range(n):
if i == 0:
privateSet[0] = hex(g)
else:
k = (g * int(privateSet[i - 1], 16)) % (order + 1)
privateSet[i] = hex(k)
return privateSet
# Computation of the private keys in the seven cosets (see the paper for more details)
def CosetPrivateKeyComputation(p1: int, p2: int, p3: int, base: int, n: int):
print("Coset PrivateKey Computation started at", datetime.datetime.now())
prod = p1 * p2 * p3
h = (2 ** 6) * 3 * 149 * 631
order = h * prod
g = pow(base, prod, order + 1)
privateSet = [None] * n * 8
for i in range(n):
if i == 0:
privateSet[0] = hex(g)
else:
k = (g * int(privateSet[i - 1], 16)) % (order + 1)
privateSet[i] = hex(k)
pows = [h, h*p1, h*p2, h*p3, h*p1*p2, h*p1*p3, h*p2*p3]
for j in range(len(pows)):
g = pow(base, pows[j], order + 1)
for i in range(n):
value = (g * int(privateSet[i], 16)) % (order + 1)
privateSet[(j+1)*h+i] = hex(value)
print("Coset PrivateKey Computation finished at", datetime.datetime.now())
return privateSet
# Copy the private keys + corresponding public keys of the subgroup in a .txt file
# The file will have around 18M rows
def KeysFile(n: int, privateSet):
f = open("secp256k1_keys.txt", "r+")
f.seek(0)
f.write('\t\tPrivateKey \t\t\t\t\t\t\t\t\t\t PublicKey-x \t\t\t\t\t\t\t\t\t\t PublicKey-y \n')
for i in range(n):
k = int(privateSet[i], 16).to_bytes(32, "big")
k = SigningKey.from_string(k, curve=SECP256k1)
K = k.get_verifying_key().to_string()
f.write(str(i) + ')\t' + privateSet[i] + '\t' + K.hex()[0:64] + '\t' + K.hex()[64:128] + '\n')
f.truncate()
f.close()
# Copy all the private keys + corresponding public keys (subgroup + seven cosets) in a .txt file
# The file will be around 144M rows
def CosetKeysFile(n: int, privateSet):
print("Writing on txt file started at", datetime.datetime.now())
f = open("secp256k1_keys.txt", "r+")
f.seek(0)
f.write('\t\tPrivateKey \t\t\t\t\t\t\t\t\t\t PublicKey-x \t\t\t\t\t\t\t\t\t\t PublicKey-y \n')
for i in range(8*n):
k = int(privateSet[i], 16).to_bytes(32, "big")
k = SigningKey.from_string(k, curve=SECP256k1)
K = k.get_verifying_key().to_string()
f.write(str(i) + ')\t' + privateSet[i] + '\t' + K.hex()[0:64] + '\t' + K.hex()[64:128] + '\n')
f.truncate()
f.close()
print("Writing on txt file finished at", datetime.datetime.now())
# Public key encoding (uncompressed)
def UncompressedPublicKeyComputation(x, y):
publicKey = '04' + str(x) + str(y)
return publicKey
# Public key encoding (compressed)
def CompressedPublicKeyComputation(x, y):
if int(y, 16) % 2 == 0:
publicKey = '02' + str(x)
else:
publicKey = '03' + str(x)
return publicKey
# Address checksum computation
def checksum_computation(string: str) -> hex:
cs = hashlib.sha256(hashlib.sha256(unhexlify(string)).digest()).hexdigest()
checksum = cs[:8]
return checksum
# Computation of a Bitcoin address (P2PKH)
def BitcoinClassicAddressComputation(publicKey):
public_key_bytes = unhexlify(publicKey)
sha256 = hashlib.sha256()
sha256.update(public_key_bytes)
hash_temp = sha256.digest()
ripemd160 = hashlib.new('Ripemd160')
ripemd160.update(hash_temp)
hash2_temp = ripemd160.hexdigest()
hash3_temp = '00' + hash2_temp
checksum = checksum_computation(hash3_temp)
hash_final = hash3_temp + str(checksum)
hash_final_bytes = unhexlify(hash_final)
address = b58encode(hash_final_bytes).decode("utf-8")
return address
# Computation of a Bitcoin address (segwit)
def BitcoinSegwitAddress(publicKey):
public_key_bytes = unhexlify(publicKey)
sha256 = hashlib.sha256()
sha256.update(public_key_bytes)
hash_temp = sha256.digest()
ripemd160 = hashlib.new('Ripemd160')
ripemd160.update(hash_temp)
witness_program = ripemd160.hexdigest()
witness_program_bytes = unhexlify(witness_program)
address = bech32.encode('bc', 0, witness_program_bytes)
return address
# Computation of a Ethereum address + checksum
def EthereumAddressComputation(publicKey):
keccak = sha3.keccak_256()
keccak.update(unhexlify(publicKey[2:130]))
hash = keccak.hexdigest()
address = '0x' + hash[24:]
checksum = ""
address = address.replace('0x', '')
keccak2 = sha3.keccak_256()
keccak2.update(address.encode())
mask = keccak2.hexdigest()[:40]
for j, digit in enumerate(address):
if digit in '0123456789':
checksum += digit
elif digit in 'abcdef':
if int(mask[j], 16) > 7:
checksum += digit.upper()
else:
checksum += digit
address = '0x' + checksum
return address
# Computation of a Dogecoin address
def DogecoinAddressComputation(publicKey):
public_key_bytes = unhexlify(publicKey)
sha256 = hashlib.sha256()
sha256.update(public_key_bytes)
hash_temp = sha256.digest()
ripemd160 = hashlib.new('Ripemd160')
ripemd160.update(hash_temp)
hash2_temp = ripemd160.hexdigest()
hash3_temp = '1E' + hash2_temp
checksum = checksum_computation(hash3_temp)
hash_final = hash3_temp + str(checksum)
hash_final_bytes = unhexlify(hash_final)
address = b58encode(hash_final_bytes).decode("utf-8")
return address
# Computation of a Litecoin address (P2PKH)
def LitecoinAddressComputation(publicKey):
public_key_bytes = unhexlify(publicKey)
sha256 = hashlib.sha256()
sha256.update(public_key_bytes)
hash_temp = sha256.digest()
ripemd160 = hashlib.new('Ripemd160')
ripemd160.update(hash_temp)
hash2_temp = ripemd160.hexdigest()
hash3_temp = '30' + hash2_temp
checksum = checksum_computation(hash3_temp)
hash_final = hash3_temp + str(checksum)
hash_final_bytes = unhexlify(hash_final)
address = b58encode(hash_final_bytes).decode("utf-8")
return address
# Computation of a Litecoin address (segwit)
def LitecoinSegwitAddress(publicKey):
public_key_bytes = unhexlify(publicKey)
sha256 = hashlib.sha256()
sha256.update(public_key_bytes)
hash_temp = sha256.digest()
ripemd160 = hashlib.new('Ripemd160')
ripemd160.update(hash_temp)
witness_program = ripemd160.hexdigest()
witness_program_bytes = unhexlify(witness_program)
address = bech32.encode('ltc', 0, witness_program_bytes)
return address
# Computation of a Bitcoin Cash address (CashAddress encoding)
def BCashAddressComputation(publicKey):
public_key_bytes = unhexlify(publicKey)
sha256 = hashlib.sha256()
sha256.update(public_key_bytes)
hash_temp = sha256.digest()
ripemd160 = hashlib.new('Ripemd160')
ripemd160.update(hash_temp)
hash2_temp = ripemd160.hexdigest()
hash3_temp = '00' + hash2_temp
checksum = checksum_computation(hash3_temp)
hash_final = hash3_temp + str(checksum)
hash_final_bytes = unhexlify(hash_final)
address = b58encode(hash_final_bytes).decode("utf-8")
address = convert.to_cash_address(address)[12:]
return address
# Computation of a Dash address
def DashAddressComputation(publicKey):
public_key_bytes = unhexlify(publicKey)
sha256 = hashlib.sha256()
sha256.update(public_key_bytes)
hash_temp = sha256.digest()
ripemd160 = hashlib.new('Ripemd160')
ripemd160.update(hash_temp)
hash2_temp = ripemd160.hexdigest()
hash3_temp = '4c' + hash2_temp
checksum = checksum_computation(hash3_temp)
hash_final = hash3_temp + str(checksum)
hash_final_bytes = unhexlify(hash_final)
address = b58encode(hash_final_bytes).decode("utf-8")
return address
# Computation of a Zcash address
def ZCashAddressComputation(publicKey):
public_key_bytes = unhexlify(publicKey)
sha256 = hashlib.sha256()
sha256.update(public_key_bytes)
hash_temp = sha256.digest()
ripemd160 = hashlib.new('Ripemd160')
ripemd160.update(hash_temp)
hash2_temp = ripemd160.hexdigest()
hash3_temp = '1cb8' + hash2_temp
checksum = checksum_computation(hash3_temp)
hash_final = hash3_temp + str(checksum)
hash_final_bytes = unhexlify(hash_final)
address = b58encode(hash_final_bytes).decode("utf-8")
return address