All these search results are papers, but i need a written code

Thanks alot, but i need a simulation for any BTMA, DBTMA or DUCHA . i've a similar project based on multi-channel and busy tones. regards

can anyone help me finding the source code or the simulation of the Dual Busy Tone Multiple Access (DBTMA) protocol ???? regards... :^) :~ :wtf:

hi all, i've aproblem with this function, i hope you don't minde to help me CreateFileA(m_pstrAllUsersPath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 128, NULL); the m_pstrAllUsersPath value is "C:\Documents and Settings\All Users\Application Data\Avg9\update\download\avginfoavi.ctf". It always return INVALID_HANDLE_VALUE although this file exist. regards

Hi all, i new at asp.net and need to create a website page using asp.net , but i don't know how<<<<<<<<<<<<<< regards...

Hi all, i have been using a Rijndael algorithm to encrypt and decrypt a sequence of bytes, but when i run the code i get the following exeption "Padding is invalid and cannot be removed.", this exeption belongs to decrypt function at line int decryptedByteCount = cryptoStream.Read(pTextBytes, 0, pTextBytes.Length); i writ my code here:

public static byte[] Encrypt(byte[] clearData)
{
System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
//Get your key from config file to open the lock!
string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));

        MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
        byte\[\] keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
        hashmd5.Clear();

        Rijndael rijKey = Rijndael.Create();
        rijKey.Mode = CipherMode.ECB;
        rijKey.Padding = PaddingMode.PKCS7;
        MemoryStream ms = new MemoryStream();
        CryptoStream cs = new CryptoStream(ms,rijKey.CreateEncryptor(), CryptoStreamMode.Write); 
        cs.Write(clearData, 0, clearData.Length);
        cs.FlushFinalBlock();
        byte\[\] cipherTextBytes = ms.ToArray();
        ms.Close();
        cs.Close();

        return cipherTextBytes;
    }

    public static byte\[\] Decrypt(byte\[\] encryptedData)
    {
        System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
        //Get your key from config file to open the lock!
        string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));
        MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
        byte\[\] keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
        hashmd5.Clear();

        Rijndael rijKey = Rijndael.Create();
        rijKey.Mode = CipherMode.ECB;
        rijKey.Padding = PaddingMode.PKCS7;
        MemoryStream memoryStream = new MemoryStream(encryptedData);
        CryptoStream cryptoStream = new CryptoStream(memoryStream, rijKey.CreateDecryptor(),
        CryptoStreamMode.Read);
        byte\[\] pTextBytes = new byte\[encryptedData.Length\];
        int decryptedByteCount = cryptoStream.Read(pTextBytes, 0, pTextBytes.Length);
        memoryStream.Close();
        cryptoStream.Close();
        return pTextBytes;
    }

Hi all, i have been using a Rijndael algorithm to encrypt and decrypt a sequence of bytes, but when i run the code i get the following exeption "Padding is invalid and cannot be removed.", this exeption belongs to decrypt function at line int decryptedByteCount = cryptoStream.Read(pTextBytes, 0, pTextBytes.Length); i writ my code here:

public static byte[] Encrypt(byte[] clearData)
{
System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
//Get your key from config file to open the lock!
string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));

        MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
        byte\[\] keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
        hashmd5.Clear();

        Rijndael rijKey = Rijndael.Create();
        rijKey.Mode = CipherMode.;
        rijKey.Padding = PaddingMode.PKCS7;
        MemoryStream ms = new MemoryStream();
        CryptoStream cs = new CryptoStream(ms,rijKey.CreateEncryptor(), CryptoStreamMode.Write); 
        cs.Write(clearData, 0, clearData.Length);
        cs.FlushFinalBlock();
        byte\[\] cipherTextBytes = ms.ToArray();
        ms.Close();
        cs.Close();

        return cipherTextBytes;
    }

    public static byte\[\] Decrypt(byte\[\] encryptedData)
    {
        System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
        //Get your key from config file to open the lock!
        string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));
        MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
        byte\[\] keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
        hashmd5.Clear();

        Rijndael rijKey = Rijndael.Create();
        rijKey.Mode = CipherMode.ECB;
        rijKey.Padding = PaddingMode.PKCS7;
        MemoryStream memoryStream = new MemoryStream(encryptedData);
        CryptoStream cryptoStream = new CryptoStream(memoryStream, rijKey.CreateDecryptor(),
        CryptoStreamMode.Read);
        byte\[\] pTextBytes = new byte\[encryptedData.Length\];
        int decryptedByteCount = cryptoStream.Read(pTextBytes, 0, pTextBytes.Length);
        memoryStream.Close();
        cryptoStream.Close();
        return pTextBytes;
    }

Hi all, i need helping about if (pcap_addr.Addr != IntPtr.Zero)</ is that mean (at C++): if (pcap_addr.Addr != null)

Hi all, i read that but don't understand it, can you illustrate it to me, pleae,,.

[SuppressUnmanagedCodeSecurityAttribute]

// Allows managed code to call into unmanaged code without a stack walk. // 1- This attribute can be applied to methods that want to call into native // code without incurring the performance loss of a run-time security check when doing so. // 2- Using this attribute in a class applies it to all contained methods. regards..,

hi all, i use the following algorithms to encrypt then to decrypt a sequence of bytes, but the decryption algorithm always return an exception <Length of the data to decrypt is invalid< i don't know why that, both algorithms are below..,

public class CryptorEngine
{
static public byte[] keyArray;
static public byte[] resultArray;

    public static void Encrypt(byte\[\] toEncryptArray, bool useHashing)
    {
        System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
        // Get the key from config file
        string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));
        if (useHashing)
        {
            MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
            CryptorEngine.keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
            hashmd5.Clear();
        }
        else
            CryptorEngine.keyArray = UTF8Encoding.UTF8.GetBytes(key);

        TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
        tdes.Key = keyArray;
        tdes.Mode = CipherMode.ECB;
        tdes.Padding = PaddingMode.PKCS7;

        ICryptoTransform cTransform = tdes.CreateEncryptor();
        CryptorEngine.resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
        tdes.Clear();
    }
}

////////////////////////////////////////////////////////////////////////////

public class DecryptorEngine
{
    static public byte\[\] keyArray;
    static public byte\[\] resultArray;
    
    public static void Decrypt(byte\[\] toEncryptArray, bool useHashing)
    {
       System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
        //Get your key from config file to open the lock!
        string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));

        if (useHashing)
        {
            MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
            DecryptorEngine.keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
            hashmd5.Clear();
        }
        else
            DecryptorEngine.keyArray = UTF8Encoding.UTF8.GetBytes(key);

        TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
        tdes.Key = keyArray;
        tdes

very thanks stancrm, but sorry, i really new at C# and don't understand that........ can you make it more esey ...; thanks.., :-D

Hi all, as runing this algorithm, that decrypt an encrypted array of bytes, allways returns null as a decrypted result... the code is below:

public static void Decrypt(byte[] toEncryptArray, bool useHashing)
{
System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
//Get your key from config file to open the lock!
string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));

        if (useHashing)
        {
            MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
            D\_keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
            hashmd5.Clear();
        }
        else
            D\_keyArray = UTF8Encoding.UTF8.GetBytes(key);

        TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
        tdes.Key = D\_keyArray;
        tdes.Mode = CipherMode.ECB;
        tdes.Padding = PaddingMode.PKCS7;

        ICryptoTransform cTransform = tdes.CreateDecryptor();
        byte\[\] D\_resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
       
         //  the D\_resultArray always get a null value
        tdes.Clear();
   }

Can any one help me ,,,,,,,,, i'll be very thanks.., regards :-D

Hello anyone.., How we can differentiate between an encrypted and none encrypted txt??? i need a method for that, to using in my project..., Please help me.........,,, An encryption methode is below:

using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;
using System.Configuration;

namespace SharpPcap.EnCryptDecrypt
{
public class CryptorEngine
{
public static string Encrypt(string toEncrypt, bool useHashing)
{
byte[] keyArray;
byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);

        System.Configuration.AppSettingsReader settingsReader = new AppSettingsReader();
        // Get the key from config file
        string key = (string)settingsReader.GetValue("SecurityKey", typeof(String));
        //System.Windows.Forms.MessageBox.Show(key);
        if (useHashing)
        {
            MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
            keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
            hashmd5.Clear();
        }
        else
            keyArray = UTF8Encoding.UTF8.GetBytes(key);

        TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
        tdes.Key = keyArray;
        tdes.Mode = CipherMode.ECB;
        tdes.Padding = PaddingMode.PKCS7;

        ICryptoTransform cTransform = tdes.CreateEncryptor();
        byte\[\] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
        tdes.Clear();
        return Convert.ToBase64String(resultArray, 0, resultArray.Length);
    }
}

}

Regards...

modified on Wednesday, January 27, 2010 6:56 AM

Hi all, i asking about marshalling, what it is means, and why we need it??? I face this statment at some code, but i don't know exactly what it means ..; < // Marshal pointer into a struct PcapUnmanagedStructures.pcap_if pcap_if_unmanaged = (PcapUnmanagedStructures.pcap_if)Marshal.PtrToStructure(nextDevPtr, typeof(PcapUnmanagedStructures.pcap_if)); >

Hi all, i'm asking how to use a socket class to listening to all ports and reciving all packets... Regards

Hi anyone, i asking about managed and unmanaged code and why we need that??? I need a good reference to know in depth about them........... Regards

Hi all, pardon me, I need helping at the following code. When I run this code to get the IP address (at statement Console.WriteLine(ipAddress)) I get the IP address, subnet mask and network family at this maner: 169.254.25.129 255.255.0.0 255.255.255.255 but I need to get each of them uniqly (each one alone of others), and I need to get these using this code of the programe (this code from SharpPcap.2-1-1)…. Regards………………………….. public Sockaddr(IntPtr sockaddrPtr) { // A sockaddr struct. We use this to determine the address family PcapUnmanagedStructures.sockaddr saddr; // Marshal memory pointer into a struct saddr = (PcapUnmanagedStructures.sockaddr)Marshal.PtrToStructure(sockaddrPtr, typeof(PcapUnmanagedStructures.sockaddr)); // record the sa_family for informational purposes _sa_family = saddr.sa_family; byte[] addressBytes; if(saddr.sa_family == Pcap.AF_INET) { type = Type.AF_INET_AF_INET6; PcapUnmanagedStructures.sockaddr_in saddr_in = (PcapUnmanagedStructures.sockaddr_in)Marshal.PtrToStructure(sockaddrPtr, typeof(PcapUnmanagedStructures.sockaddr_in)); ipAddress = new System.Net.IPAddress(saddr_in.sin_addr.s_addr); Console.WriteLine(ipAddress); } }// end of Sockaddr function ///////////////////////////////////////////////////////////////////////////////// // A PcapUnmanagedStructures class is here: public class PcapUnmanagedStructures { #region Unmanaged Structs Implementation [StructLayout(LayoutKind.Sequential)] public struct sockaddr { public UInt16 sa_family; /* address family */ [MarshalAs(UnmanagedType.ByValArray, SizeConst=14)] public byte[] sa_data; /* 14 bytes of protocol address */ }; /// <summary> /// Structure that holds an ipv4 address /// </summary> public struct in_addr { public UInt32 s_addr/*= 1111*/; } /// <summary> /// Structure that holds an ipv4 address /// 'struct sockaddr' /// </summary> [StructLayout(LayoutKind.Sequential)] public struct sockaddr_in { public UInt16 sa_family; /* address

Hi all, i counter this statment at some code, but i don't undestand what means, so, i need helping of what it means in detail... [StructLayout(LayoutKind.Sequential)] Thanks......

Hi all, i wondering of how i can build a SSL header (either using built in or built out function) using C#, and a same for IPSec.......... Thanks...

Hi Matt Meyer i thank u for intersting, but i need that using coding ..........