string GenLink(string filename)
{
FileInfo fi = new FileInfo(filename);
if (fi.Exists)
{
AICHHash aich = new AICHHash(fi.Length);
List <byte[]> hashset = new List <byte[]>();
MD4 md4 = MD4.Create();
using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read))
{
byte[] buffer = new byte[EMPARTSIZE];
int readCount;
do
{
readCount = fs.Read(buffer, 0, buffer.Length);
if (readCount > 0)
{
hashset.Add(md4.ComputeHash(buffer, 0, readCount));
aich.CalcAICH(buffer, 0, readCount);
if (worker != null && worker.WorkerReportsProgress)
{
worker.ReportProgress((int)(fs.Position * 100 / fs.Length), this);
}
}
else if (fs.Length % EMPARTSIZE == 0)
{
hashset.Add(md4.ComputeHash(new byte[] { }));
}
}while (readCount != 0);
}
byte[] filehash = new byte[16];
if (hashset.Count == 1)
{
filehash = hashset[0];
}
else
{
filehash = md4.ComputeHash(hashset.SelectMany(bytes => bytes).ToArray());
}
return(string.Format("ed2k://|file|{0}|{1}|{2}|h={3}|/", System.Web.HttpUtility.UrlEncode(fi.Name), fi.Length, String.Concat(filehash.Select(b => b.ToString("X2")).ToArray()), aich.RootHash));
}
else
{
throw new FileNotFoundException();
}
}
public void RFC1320_b(string testName, MD4 hash, byte[] input, byte[] result)
{
byte[] output = hash.ComputeHash(input, 0, input.Length);
AssertEquals(testName + ".b.1", result, output);
AssertEquals(testName + ".b.2", result, hash.Hash);
// required or next operation will still return old hash
hash.Initialize();
}
private static byte[] nTOWFv1(string password)
{
if (password == null)
{
throw new Exception("Password parameter is required");
}
return(MD4.ComputeHash(Encoding.Unicode.GetBytes(password)));
}
public void RFC1320_c(string testName, MD4 hash, byte[] input, byte[] result)
{
MemoryStream ms = new MemoryStream(input);
byte[] output = hash.ComputeHash(ms);
AssertEquals(testName + ".c.1", result, output);
AssertEquals(testName + ".c.2", result, hash.Hash);
// required or next operation will still return old hash
hash.Initialize();
}
/**
* Creates the NTLM Hash of the user's password.
*
* @param password
* The password.
*
* @return The NTLM Hash of the given password, used in the calculation of
* the NTLM Response and the NTLMv2 and LMv2 Hashes.
*/
private byte[] CalculateNtlmHash(String password)
{
byte[] unicodePassword = Encoding.Unicode.GetBytes(password);
byte[] hash;
using (HashAlgorithm md4 = new MD4())
{
hash = md4.ComputeHash(unicodePassword);
}
return(hash);
}
/// <summary>
/// Gets the NT Lan Manager (NTLM) user session key for the given initialization values of this <see cref="CipherGen"/> class.
/// </summary>
/// <returns>The NTLM user session key.</returns>
public byte[] GetNtlmUserSessionKey()
{
if (ntlmUserSessionKey == null)
{
using (HashAlgorithm md4 = new MD4())
{
ntlmUserSessionKey = md4.ComputeHash(GetNtlmHash());
}
}
return(ntlmUserSessionKey);
}
public void TestArgumentExceptions()
{
using (var md4 = new MD4()) {
var buffer = new byte[16];
Assert.Throws <InvalidOperationException> (() => { var x = md4.Hash; });
Assert.Throws <ArgumentNullException> (() => md4.ComputeHash((byte[])null));
Assert.Throws <ArgumentNullException> (() => md4.ComputeHash((Stream)null));
Assert.Throws <ArgumentNullException> (() => md4.ComputeHash(null, 0, buffer.Length));
Assert.Throws <ArgumentOutOfRangeException> (() => md4.ComputeHash(buffer, -1, buffer.Length));
Assert.Throws <ArgumentOutOfRangeException> (() => md4.ComputeHash(buffer, 0, -1));
Assert.Throws <ArgumentNullException> (() => md4.TransformBlock(null, 0, buffer.Length, buffer, 0));
Assert.Throws <ArgumentOutOfRangeException> (() => md4.TransformBlock(buffer, -1, buffer.Length, buffer, 0));
Assert.Throws <ArgumentOutOfRangeException> (() => md4.TransformBlock(buffer, 0, -1, buffer, 0));
Assert.Throws <ArgumentOutOfRangeException> (() => md4.TransformBlock(buffer, 0, buffer.Length, buffer, -1));
Assert.Throws <ArgumentNullException> (() => md4.TransformFinalBlock(null, 0, buffer.Length));
Assert.Throws <ArgumentOutOfRangeException> (() => md4.TransformFinalBlock(buffer, -1, buffer.Length));
Assert.Throws <ArgumentOutOfRangeException> (() => md4.TransformFinalBlock(buffer, 0, -1));
}
}
public void TestSimpleInput()
{
var text = Encoding.ASCII.GetBytes("This is some sample text that we will hash using the MD4 algorithm.");
const string expected = "69b390afdf693eae92ebea5cc6669b3f";
using (var md4 = new MD4()) {
StringBuilder builder = new StringBuilder();
byte[] hash, output = new byte[16];
Assert.AreEqual(16, md4.TransformBlock(text, 0, 16, output, 0), "TransformBlock");
output = md4.TransformFinalBlock(text, 16, text.Length - 16);
Assert.NotNull(output, "TransformFinalBlock");
Assert.AreEqual(text.Length - 16, output.Length, "TransformFinalBlock");
hash = md4.Hash;
Assert.NotNull(hash, "Hash");
for (int i = 0; i < hash.Length; i++)
{
builder.Append(hash[i].ToString("x2"));
}
Assert.AreEqual(expected, builder.ToString(), "Hash");
}
using (var md4 = new MD4()) {
StringBuilder builder = new StringBuilder();
var hash = md4.ComputeHash(text);
Assert.NotNull(hash, "ComputeHash");
for (int i = 0; i < hash.Length; i++)
{
builder.Append(hash[i].ToString("x2"));
}
Assert.AreEqual(expected, builder.ToString(), "ComputeHash");
}
using (var md4 = new MD4()) {
StringBuilder builder = new StringBuilder();
byte[] hash;
using (var stream = new MemoryStream(text, false))
hash = md4.ComputeHash(stream);
Assert.NotNull(hash, "ComputeHash");
for (int i = 0; i < hash.Length; i++)
{
builder.Append(hash[i].ToString("x2"));
}
Assert.AreEqual(expected, builder.ToString(), "ComputeHash");
}
}
public static int Compute(Type t)
{
string toBeHashed = "s\0\0\0" + t.Namespace + t.Name;
using (HashAlgorithm hash = new MD4())
{
byte[] hashed = hash.ComputeHash(System.Text.Encoding.UTF8.GetBytes(toBeHashed));
int result = 0;
for (int i = 3; i >= 0; --i)
{
result <<= 8;
result |= hashed[i];
}
return(result);
}
}
static byte[] Compute_NTLM_Password(string password)
{
var buffer = new byte [21];
// create NT password
MD4 md4 = MD4.Create();
byte[] data = ((password == null) ? (new byte [0]) : (Encoding.Unicode.GetBytes(password)));
byte[] hash = md4.ComputeHash(data);
Buffer.BlockCopy(hash, 0, buffer, 0, 16);
// clean up
Array.Clear(data, 0, data.Length);
Array.Clear(hash, 0, hash.Length);
return(buffer);
}
private static int Compute(string @namespace, string name)
{
string toBeHashed = $"s\0\0\0{@namespace}{name}";
using (HashAlgorithm hash = new MD4())
{
byte[] hashed = hash.ComputeHash(Encoding.UTF8.GetBytes(toBeHashed));
int result = 0;
for (int i = 3; i >= 0; --i)
{
result <<= 8;
result |= hashed[i];
}
return result;
}
}
public static int ComputeFileID(string ns, string name)
{
using (HashAlgorithm hash = new MD4())
{
byte[] idBytes = Encoding.UTF8.GetBytes($"s\0\0\0{ns}{name}");
byte[] hashed = hash.ComputeHash(idBytes);
int result = 0;
for (int i = 3; i >= 0; --i)
{
result <<= 8;
result |= hashed[i];
}
return(result);
}
}
/// <summary>
/// Computes an NT hash value with a password using NTOWFv1.
/// </summary>
/// <param name="password">A password to compute hash</param>
/// <exception cref="ArgumentNullException">Raised if password is null</exception>
/// <returns>An NT hash value</returns>
public static byte[] GetHashWithNTOWFv1(string password)
{
if (password == null)
{
// Will be changed to StackSdkException after StackSdkException class is updated.
throw new ArgumentNullException("password");
}
byte[] hash;
using (MD4 md4 = MD4.Create())
{
// Get password byte array
byte[] passwordBuffer = Encoding.Unicode.GetBytes(password);
hash = md4.ComputeHash(passwordBuffer);
}
return(hash);
}
public byte[] Reflection() => md4.ComputeHash(data);
