Trying to replicate Ethereum Keystore File using AES 128 CTR

Question

I am trying to replicate the Ethereum Keystore File by performing the encryption using the pyscrypt and Crypto libraries in Python. I created an Ethereum Keystore file using MyEtherWallet. I took the values of SALT, IV, Private Key, Password from MyEtherWallet and hardcoded them into my program.

from os import urandom
from Crypto.Cipher import AES
from Crypto.Util import Counter
import pyscrypt

private_key = bytes.fromhex('ec675d66dfda85e4fad4196766ff212d3b56ed9961eae353a74eec001614b785')
print(private_key) # This Gives b'\xecg]f\xdf\xda\x85\xe4\xfa\xd4\x19gf\xff!-;V\xed\x99a\xea\xe3S\xa7N\xec\x00\x16\x14\xb7\x85'

salt_bytes = bytes.fromhex('90adac19fc79271237944861e8b53c20aa5b6816acd4e9a0593cfda1dda8c62a')
print(salt_bytes) # This Gives b"\x90\xad\xac\x19\xfcy'\x127\x94Ha\xe8\xb5< \xaa[h\x16\xac\xd4\xe9\xa0Y<\xfd\xa1\xdd\xa8\xc6*"

iv_int = int("3153ecf2defd7f3a00418b6656b4bd83", 16)
print(iv_int) # This Gives 65567938323613189934818362641343626627

ctr = Counter.new(nbits=64,initial_value = iv_int)
print(ctr) # This Gives {'counter_len': 8, 'prefix': b'', 'suffix': b'', 'initial_value': 65567938323613189934818362641343626627, 'little_endian': False}

def enc_key(password):
    key =  pyscrypt.hash(password = b"test12345", 
                       salt = salt_bytes, 
                       N = 8192, 
                       r = 8, 
                       p = 1, 
                       dkLen = 32)
    print(key) # This Gives b'p\xd0+\xd6X"\xa9\x06\x02\xf3\x1d*\x95\xbd\xdb,p\xecJK\x11\x0c\x12\x83\xd3k\xe84\x86^\xbaO'
    return key

def encrypt_private_key(password,private_key):
    cipher = AES.new(enc_key(password),AES.MODE_CTR, counter = ctr)
    ciphertext = cipher.encrypt(private_key)
    return ciphertext

def decrypt_private_key(password,ciphertext):
    cipher = AES.new(enc_key(password),AES.MODE_CTR, counter = ctr)
    plaintext = cipher.decrypt(ciphertext)
    return plaintext


print(private_key.hex()) # This Gives ec675d66dfda85e4fad4196766ff212d3b56ed9961eae353a74eec001614b785
print(encrypt_private_key('test12345',private_key).hex()) # This Gives b5bbacb90c61b82dd30ebbf7fa107ec6926e8129049a088f37c25f7499a848d3 but it should give f5f3b92da81c85a19c7b85f9218f76943bc9227765443214063d56e02199c385
print(decrypt_private_key('test12345',encrypt_private_key('test12345',private_key)).hex()) # This Gives ec675d66dfda85e4fad4196766ff212d3b56ed9961eae353a74eec001614b785

My CipherText is different from the ciphertext in the Ethereum Keystore file. I want to obtain the same cipher text value as given by MyEtherWallet. Only parameters that are different is probably the counter value.

Trying to replicate Ethereum Keystore File using AES 128 CTR

0 Answers0