converting python to c# .net

[ogtheterror]

Hi I have a very limited understanding of Python and have given this the best shot i have but still have not been able to get it working.
Is there anyone that knows how to get this into a .net assembly?

_________________________________________________________
def encrypt_password(challenge, password):
    if challenge['algorithm'] == 'md5':
        inner = md5(challenge['salt'] + password).hexdigest()
    elif challenge['algorithm'] == 'sha1':
        inner = sha(challenge['salt'] + password).hexdigest()
    else:
        raise NotImplementedError(
            "Password encryption algorithm '%s' not implemented." %
            challenge['algorithm'])
    return md5(inner + challenge['nonce']).hexdigest()
_________________________________________________________

This is my attempt at this:

_________________________________________________________
 
        public static String GetEncryptedPassword(String password, String username)
        {
            INoncesChallengeUser proxyNoncesChallengeUser = XmlRpcProxyGen.Create<INoncesChallengeUser>();
            XmlRpcStruct NoncesChallengeUser = proxyNoncesChallengeUser.GetNoncesChallengeUser(username);
 
            StringBuilder s = new StringBuilder();
            String nonce = (String)NoncesChallengeUser["nonce"];
            String salt = (String)NoncesChallengeUser["salt"];
            String algorithm = (String)NoncesChallengeUser["algorithm"];
 
            byte[] nonceBytes = new byte[nonce.Length];
            byte[] saltBytes = new byte[salt.Length];
            byte[] passwordBytes = new byte[password.Length];
            byte[] algorithmBytes = new byte[salt.Length + password.Length];
            byte[] InnerBytes;
 
            saltBytes = Encoding.UTF8.GetBytes(salt);
            passwordBytes = Encoding.UTF8.GetBytes(password);
            nonceBytes = Encoding.UTF8.GetBytes(nonce);
 
            //Copy password bytes into resulting array
            for (int i = 0; i < passwordBytes.Length; i++)
                algorithmBytes[i] = passwordBytes[i];
 
            //Append salt bytes to the resulting array.
            for (int i = 0; i < saltBytes.Length; i++)
                algorithmBytes[saltBytes.Length + i] = saltBytes[i];
 
            switch (algorithm.ToUpper())
            {
                case "SHA1":
                    //String encrypted_password = md5(sha1(salt + password) + nonce);
                    SHA1CryptoServiceProvider sha1 = new SHA1CryptoServiceProvider();
                    InnerBytes = sha1.ComputeHash(algorithmBytes);
                    break;
 
                default: //MD5
                    //String encrypted_password = md5(sha1(salt + password) + nonce);
                    MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
                    InnerBytes = md5.ComputeHash(algorithmBytes);
                    break;
            }
 
            //Create finalEncryptedPassword array
            byte[] encryptedPasswordBytes = new byte[InnerBytes.Length + nonceBytes.Length];
 
            //Copy inner bytes into resulting array
            for (int i = 0; i < InnerBytes.Length; i++)
                encryptedPasswordBytes[i] = InnerBytes[i];
 
            //Append nonce bytes to the resulting array.
            for (int i = 0; i < nonceBytes.Length; i++)
                encryptedPasswordBytes[InnerBytes.Length + i] = nonceBytes[i];
 
            //Now do the final md5 Encryption
            byte[] finalEncryptedPasswordBytes = new byte[32];
            MD5CryptoServiceProvider md5Final = new MD5CryptoServiceProvider();
            finalEncryptedPasswordBytes = md5Final.ComputeHash(encryptedPasswordBytes);
 
            foreach (byte b in finalEncryptedPasswordBytes)
            {
                s.Append(b.ToString("x2").ToLower());
            }
            return s.ToString();
        }
_________________________________________________________

[tlhintoq]

Looks like the long way around to me.
If all you're looking to do is encode a password or some other text maybe this will help get you on your way.

using System.Security;
using System.Security.Cryptography;
using System.Globalization;
 
        public static string EncodePassword(string originalPassword)
        {
            //Declarations
            Byte[] originalBytes;
            Byte[] encodedBytes;
            MD5 md5;
 
            //Instantiate MD5CryptoServiceProvider, get bytes for original password and compute hash (encoded password)
            md5 = new MD5CryptoServiceProvider();
            originalBytes = ASCIIEncoding.Default.GetBytes(originalPassword);
            encodedBytes = md5.ComputeHash(originalBytes);
 
            //Convert encoded bytes back to a 'readable' string
            return BitConverter.ToString(encodedBytes);
        }
 
 

[ogtheterror]

Thanks for your speedy response, I've revised the code and yes its way neater but i still don't seem to be getting the correct response.

        public static String GetEncryptedPassword(String password, String username)
        {
            INoncesChallengeUser proxyNoncesChallengeUser = XmlRpcProxyGen.Create<INoncesChallengeUser>();
            XmlRpcStruct NoncesChallengeUser = proxyNoncesChallengeUser.GetNoncesChallengeUser(username);
 
            String nonce = (String)NoncesChallengeUser["nonce"];
            String salt = (String)NoncesChallengeUser["salt"];
            String algorithm = (String)NoncesChallengeUser["algorithm"];
            String inner;
            String final;
 
            //encrypted_password = md5(sha1(salt + password) + nonce);
            if (algorithm.ToUpper() == "SHA1")
                inner = Sha1EncodePassword(salt + password);
            else
                inner = Md5EncodePassword(salt + password);
 
            final = Md5EncodePassword(inner + nonce);
            return final;
        }
 
        private static string Md5EncodePassword(string originalPassword)
        {
            //Declarations
            Byte[] originalBytes;
            Byte[] encodedBytes;
            MD5 md5;
 
            //Instantiate MD5CryptoServiceProvider, get bytes for original password and compute hash (encoded password)
            md5 = new MD5CryptoServiceProvider();
            originalBytes = ASCIIEncoding.Default.GetBytes(originalPassword);
            encodedBytes = md5.ComputeHash(originalBytes);
 
            //Convert encoded bytes back to a 'readable' string
            return BitConverter.ToString(encodedBytes).ToLower();
        }
 
        private static string Sha1EncodePassword(string originalPassword)
        {
            //Declarations
            Byte[] originalBytes;
            Byte[] encodedBytes;
            SHA1 sha1;
 
            //Instantiate MD5CryptoServiceProvider, get bytes for original password and compute hash (encoded password)
            sha1 = new SHA1CryptoServiceProvider();
            originalBytes = ASCIIEncoding.Default.GetBytes(originalPassword);
            encodedBytes = sha1.ComputeHash(originalBytes);
 
            //Convert encoded bytes back to a 'readable' string
            return BitConverter.ToString(encodedBytes).ToLower();
        }

[bvdet]

ogtheterror

In the future, please use code tags when posting code.

posting guidelines

-BV
Moderator

[tlhintoq]

Thanks for your speedy response, I've revised the code and yes its way neater but i still don't seem to be getting the correct response.

Feel free to expand on that... What *are* you getting and in what way is it not what you were expecting? Are you getting errors, crashes, or just not what you thought you would get and how?

[toanmh]

Hi all!
I'm looking in google found some code in python to unwrap package in oracle. But I don't know it.Some one help me to convert it to C# or Java. Please.
Thanks.!

import re
import base64
import zlib
import sys
 
# simple substitution table
charmap = [0x3d, 0x65, 0x85, 0xb3, 0x18, 0xdb, 0xe2, 0x87, 0xf1, 0x52, 0xab, 0x63, 0x4b, 0xb5, 0xa0, 0x5f, 0x7d, 0x68, 0x7b, 0x9b, 0x24, 0xc2, 0x28, 0x67, 0x8a, 0xde, 0xa4, 0x26, 0x1e, 0x03, 0xeb, 0x17, 0x6f, 0x34, 0x3e, 0x7a, 0x3f, 0xd2, 0xa9, 0x6a, 0x0f, 0xe9, 0x35, 0x56, 0x1f, 0xb1, 0x4d, 0x10, 0x78, 0xd9, 0x75, 0xf6, 0xbc, 0x41, 0x04, 0x81, 0x61, 0x06, 0xf9, 0xad, 0xd6, 0xd5, 0x29, 0x7e, 0x86, 0x9e, 0x79, 0xe5, 0x05, 0xba, 0x84, 0xcc, 0x6e, 0x27, 0x8e, 0xb0, 0x5d, 0xa8, 0xf3, 0x9f, 0xd0, 0xa2, 0x71, 0xb8, 0x58, 0xdd, 0x2c, 0x38, 0x99, 0x4c, 0x48, 0x07, 0x55, 0xe4, 0x53, 0x8c, 0x46, 0xb6, 0x2d, 0xa5, 0xaf, 0x32, 0x22, 0x40, 0xdc, 0x50, 0xc3, 0xa1, 0x25, 0x8b, 0x9c, 0x16, 0x60, 0x5c, 0xcf, 0xfd, 0x0c, 0x98, 0x1c, 0xd4, 0x37, 0x6d, 0x3c, 0x3a, 0x30, 0xe8, 0x6c, 0x31, 0x47, 0xf5, 0x33, 0xda, 0x43, 0xc8, 0xe3, 0x5e, 0x19, 0x94, 0xec, 0xe6, 0xa3, 0x95, 0x14, 0xe0, 0x9d, 0x64, 0xfa, 0x59, 0x15, 0xc5, 0x2f, 0xca, 0xbb, 0x0b, 0xdf, 0xf2, 0x97, 0xbf, 0x0a, 0x76, 0xb4, 0x49, 0x44, 0x5a, 0x1d, 0xf0, 0x00, 0x96, 0x21, 0x80, 0x7f, 0x1a, 0x82, 0x39, 0x4f, 0xc1, 0xa7, 0xd7, 0x0d, 0xd1, 0xd8, 0xff, 0x13, 0x93, 0x70, 0xee, 0x5b, 0xef, 0xbe, 0x09, 0xb9, 0x77, 0x72, 0xe7, 0xb2, 0x54, 0xb7, 0x2a, 0xc7, 0x73, 0x90, 0x66, 0x20, 0x0e, 0x51, 0xed, 0xf8, 0x7c, 0x8f, 0x2e, 0xf4, 0x12, 0xc6, 0x2b, 0x83, 0xcd, 0xac, 0xcb, 0x3b, 0xc4, 0x4e, 0xc0, 0x69, 0x36, 0x62, 0x02, 0xae, 0x88, 0xfc, 0xaa, 0x42, 0x08, 0xa6, 0x45, 0x57, 0xd3, 0x9a, 0xbd, 0xe1, 0x23, 0x8d, 0x92, 0x4a, 0x11, 0x89, 0x74, 0x6b, 0x91, 0xfb, 0xfe, 0xc9, 0x01, 0xea, 0x1b, 0xf7, 0xce]
 
def decode_base64_package(base64str):
    base64dec = base64.b64decode(base64str)[20:] # we strip the first 20 chars (SHA1 hash, I don't bother checking it at the moment)
    decoded = ''
    for byte in range(0, len(base64dec)):
        decoded += chr(charmap[ord(base64dec[byte])])
    return zlib.decompress(decoded)
 
 
sys.stderr.write("=== Oracle 10g/11g PL/SQL unwrapper - by Niels Teusink - blog.teusink.net ===\n\n" )
if len(sys.argv) < 2:
    sys.stderr.write("Usage: %s infile.plb [outfile]\n" % sys.argv[0])
    sys.exit(1)
 
infile = open(sys.argv[1])
outfile = None
if len(sys.argv) == 3:
    outfile = open(sys.argv[2], 'w')
 
lines = infile.readlines()
if outfile:
for i in range(0, len(lines)):
    # this is really naive parsing, but works on every package I've thrown at it
    matches = re.compile(r"^[0-9a-f]+ ([0-9a-f]+)$").match(lines[i])
    if matches:
        base64len = int(matches.groups()[0], 16)
        #print matches.groups()[0]
        base64str = ''
        j = 0
        #print base64len
        while len(base64str) < base64len:
            j+=1
            base64str += lines[i+j]
            #print j
        base64str = base64str.replace("\n","")
 
        if outfile:
            outfile.write(decode_base64_package(base64str) + "\n")
        else:
            print decode_base64_package(base64str)
print "Unwrap is successfully!"
 
 

[hitmanjd]

@toanmh
hello all, migrate the python code to IronPython, but I have problems with the zlib library, there is no way to load the program.
Anyone know how I can load this library.