MD5 and TripleDES - C# and Python implementation

C implementation

using System.Security.Cryptography;

class Program
    {
        static void Main(string[] args)
        {
            var privatekey = "RN4nog0661VvjzphNg48372t747365mNfSxirueSDYstqsqeQn?=";
            var skey = "e99308c2e3373fb041775a0c813f397d";
            var c = new Program();
            var encrypted = c.crypto(skey, privatekey, "encrypt");
            Console.WriteLine("ENCRYPTED: {0}", encrypted);
            var decrypted = c.crypto(encrypted, privatekey, "decrypt");
            Console.WriteLine("DECRYPTED: {0}", decrypted);   
        }

        public string crypto(string sk, string privatekey, string type)
        {
            byte[] results;
            System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();

            MD5CryptoServiceProvider hashProvider = new MD5CryptoServiceProvider();
            byte[] tdeskey = hashProvider.ComputeHash(UTF8.GetBytes(privatekey));
            TripleDESCryptoServiceProvider tripDES = new TripleDESCryptoServiceProvider();
            
            tripDES.Key = tdeskey;
            tripDES.Mode = CipherMode.ECB;
            tripDES.Padding = PaddingMode.PKCS7;

            byte[] data = null;
            ICryptoTransform enc = null;

            switch (type)
            {
                case "encrypt":
                    enc = tripDES.CreateEncryptor();
                    data = UTF8.GetBytes(sk);
                    break;
                case "decrypt":
                    enc = tripDES.CreateDecryptor();
                    data = Convert.FromBase64String(sk);
                    break;
            }       

            try
            {
                results = enc.TransformFinalBlock(data, 0, data.Length);
            }
            finally
            {
                tripDES.Clear();
                hashProvider.Clear();
            }

            if (type == "decrypt")
                return UTF8.GetString(results);
            else
                return Convert.ToBase64String(results);
        }
    }

C# implementation

class Program
    {
        static void Main(string[] args)
        {
            var privatekey = "RN4nog0661VvjzphNg48372t747365mNfSxirueSDYstqsqeQn?=";
            var skey = "e99308c2e3373fb041775a0c813f397d";
            var c = new Program();
            var encrypted = c.crypto(skey, privatekey, "encrypt");
            Console.WriteLine("ENCRYPTED: {0}", encrypted);
            var decrypted = c.crypto(encrypted, privatekey, "decrypt");
            Console.WriteLine("DECRYPTED: {0}", decrypted);   
        }

        public string crypto(string sk, string privatekey, string type)
        {
            byte[] results;
            System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();

            MD5CryptoServiceProvider hashProvider = new MD5CryptoServiceProvider();
            byte[] tdeskey = hashProvider.ComputeHash(UTF8.GetBytes(privatekey));
            TripleDESCryptoServiceProvider tripDES = new TripleDESCryptoServiceProvider();
            
            tripDES.Key = tdeskey;
            tripDES.Mode = CipherMode.ECB;
            tripDES.Padding = PaddingMode.PKCS7;

            byte[] data = null;
            ICryptoTransform enc = null;

            switch (type)
            {
                case "encrypt":
                    enc = tripDES.CreateEncryptor();
                    data = UTF8.GetBytes(sk);
                    break;
                case "decrypt":
                    enc = tripDES.CreateDecryptor();
                    data = Convert.FromBase64String(sk);
                    break;
            }       

            try
            {
                results = enc.TransformFinalBlock(data, 0, data.Length);
            }
            finally
            {
                tripDES.Clear();
                hashProvider.Clear();
            }

            if (type == "decrypt")
                return UTF8.GetString(results);
            else
                return Convert.ToBase64String(results);
        }
    }

Python implementation

from Crypto.Cipher import DES3
import hashlib

privatekey = "RN4nog0661VvjzphNg48372t747365mNfSxirueSDYstqsqeQn?="
skey = "e99308c2e3373fb041775a0c813f397d"

BS = DES3.block_size

pad = lambda s: s + (BS - len(s) % BS) * chr(BS - len(s) % BS)
unpad = lambda s : s[0:-ord(s[-1])]

m = hashlib.md5()
m.update(privatekey)

cipher = DES3.new(m.digest())

enc = cipher.encrypt(pad(skey))
dec = unpad(cipher.decrypt(enc))

print 'ENCRYPTED: {0}',enc.encode('base64')
print 'DECRYPTED: {0}',dec