/// Encodes the specified string.
/// @param text The string to encode.
/// @returns The encoded string.
public string Encode(string text)
{
var buffer = Encoding.Default.GetBytes(text);
var hash = MD4.Create().ComputeHash(buffer);
return(HexCodec.GetString(hash));
}
public override void Create()
{
// try creating ourselve using Create
HashAlgorithm h = MD4.Create("MD4Managed");
Assert.IsTrue((h is MD4Managed), "MD4Managed");
}
public static long SerializationIndexFromObjectIdentifier(ObjectIdentifier objectID)
{
byte[] bytes;
var md4 = MD4.Create();
if (objectID.fileType == FileType.MetaAssetType || objectID.fileType == FileType.SerializedAssetType)
{
// TODO: Variant info
// NOTE: ToString() required as unity5 used the guid as a string to hash
bytes = Encoding.ASCII.GetBytes(objectID.guid.ToString());
md4.TransformBlock(bytes, 0, bytes.Length, bytes, 0);
bytes = BitConverter.GetBytes((int)objectID.fileType);
md4.TransformBlock(bytes, 0, bytes.Length, bytes, 0);
}
// Or path
else
{
bytes = Encoding.ASCII.GetBytes(objectID.filePath);
md4.TransformBlock(bytes, 0, bytes.Length, bytes, 0);
}
bytes = BitConverter.GetBytes(objectID.localIdentifierInFile);
md4.TransformFinalBlock(bytes, 0, bytes.Length);
var hash = BitConverter.ToInt64(md4.Hash, 0);
return(hash);
}
public virtual void Create()
{
// create the default implementation
HashAlgorithm h = MD4.Create();
Assert("MD4Managed", (h is MD4Managed));
// Note: will fail is default is changed in machine.config
}
public static string GenerateInternalFileName(string name)
{
var md4 = MD4.Create();
var bytes = Encoding.ASCII.GetBytes(name);
md4.TransformFinalBlock(bytes, 0, bytes.Length);
return("CAB-" + BitConverter.ToString(md4.Hash, 0).ToLower().Replace("-", ""));
}
private static int ComputeGuid(Type t) // TODO why does scriptable build pipeline not provide this
{
string hashGenerator = "s\0\0\0" + t.Namespace + t.Name;
using (var md4 = MD4.Create())
{
byte[] hash = md4.ComputeHash(Encoding.UTF8.GetBytes(hashGenerator));
return(BitConverter.ToInt32(hash, 0));
}
}
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();
}
}
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);
}
/// <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);
}
static internal HashAlgorithm CreateFromName(string name)
{
#if FULL_AOT_RUNTIME
switch (name)
{
case "MD2":
return(MD2.Create());
case "MD4":
return(MD4.Create());
case "MD5":
return(MD5.Create());
case "SHA1":
return(SHA1.Create());
case "SHA256":
return(SHA256.Create());
case "SHA384":
return(SHA384.Create());
case "SHA512":
return(SHA512.Create());
case "RIPEMD160":
return(RIPEMD160.Create());
default:
try {
return((HashAlgorithm)Activator.CreateInstance(Type.GetType(name)));
}
catch {
throw new CryptographicException("Unsupported hash algorithm: " + name);
}
}
#else
return(HashAlgorithm.Create(name));
#endif
}
static SecurityUtils()
{
MD4Singleton = MD4.Create();
}
public V3Store(string storeBasePath)
: base(storeBasePath, "v3\\p", "v3\\w", MD4.Create(), V3Store.BinaryHashLength, V3Store.BinaryHashOffset)
{
}
public static byte[] ComputeMD4Binary(byte[] data)
{
using (HashAlgorithm cryptor = MD4.Create()) {
return(cryptor.ComputeHash(data));
}
}