Hi all,
I'm trying to implement a Python equivalent of a C# method that encrypts
a string.
My Python attempt is in the attached file, but does not return the same
value as the C# method (see below).
Any hints?
Thanks,
Andreas
The C# method:
public static string Encrypt(string decrypted)
{
byte[] data = System.Text.ASCIIEncoding.ASCII.GetBytes(decrypted );
byte[] rgbKey = System.Text.ASCIIEncoding.ASCII.GetBytes("12345678 ");
byte[] rgbIV = System.Text.ASCIIEncoding.ASCII.GetBytes("87654321 ");
MemoryStream memoryStream = new MemoryStream(1024);
DESCryptoServiceProvider desCryptoServiceProvider = new
DESCryptoServiceProvider();
CryptoStream cryptoStream = new CryptoStream(memoryStream,
desCryptoServiceProvider.CreateEncryptor(rgbKey, rgbIV),
CryptoStreamMode.Write);
cryptoStream.Write(data, 0, data.Length);
cryptoStream.FlushFinalBlock();
byte[] result = new byte[(int)memoryStream.Position];
memoryStream.Position = 0;
memoryStream.Read(result, 0, result.Length);
cryptoStream.Close();
return System.Convert.ToBase64String(result);
}
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#!/usr/bin/env python
from Crypto.Cipher import DES
import base64
def base64DESEncrypt(plaintext):
# Set the key to be used:
rgbKey = "12345678"
# Set the Initial Value (IV) to be used:
rgbIV = "87654321"
des_object=DES.new(rgbKey, DES.MODE_ECB)
des_object.IV = rgbIV
ciphertext = des_object.encrypt(plaintext)
base64_ciphertext = base64.encodestring(ciphertext)
return base64_ciphertext
if __name__ == '__main__':
# The length of the string has to be a multiple of 8, for simplicity (for now).
# The C# code does not have this limitation, so I'd have to look at
# that as well.
print base64DESEncrypt('password')
# Original C# method that I'm trying to translate:
#
#public static string Encrypt(string decrypted)
#{
# byte[] data = System.Text.ASCIIEncoding.ASCII.GetBytes(decrypted );
# byte[] rgbKey = System.Text.ASCIIEncoding.ASCII.GetBytes("12345678 ");
# byte[] rgbIV = System.Text.ASCIIEncoding.ASCII.GetBytes("87654321 ");
#
# MemoryStream memoryStream = new MemoryStream(1024);
#
# DESCryptoServiceProvider desCryptoServiceProvider = new DESCryptoServiceProvider();
#
# CryptoStream cryptoStream = new CryptoStream(memoryStream,
# desCryptoServiceProvider.CreateEncryptor(rgbKey, rgbIV),
# CryptoStreamMode.Write);
#
# cryptoStream.Write(data, 0, data.Length);
# cryptoStream.FlushFinalBlock();
# byte[] result = new byte[(int)memoryStream.Position];
# memoryStream.Position = 0;
# memoryStream.Read(result, 0, result.Length);
# cryptoStream.Close();
# return System.Convert.ToBase64String(result);
#}
