/// <summary>
/// A method for getting a ED2K hash from a specified file path
/// </summary>
/// <param name="filePath">The path for the file to hash</param>
/// <returns>A string containing the ED2K hash</returns>
public static string GetED2K(string filePath)
{
string hash = String.Empty;
using (FileStream file = File.OpenRead(filePath))
{
byte[] buffer;
const int CHUNK_SIZE = 9728000;
double totalChunkCount = 0;
long chunkCount = 0;
int bufferLength = 0;
MD4 md4 = new MD4();
List <byte> md4HashedBytes = new List <byte>();
buffer = new byte[CHUNK_SIZE];
totalChunkCount = Math.Ceiling(file.Length * 1.0 / CHUNK_SIZE);
while ((bufferLength = file.Read(buffer, 0, CHUNK_SIZE)) > 0)
{
++chunkCount;
byte[] chunkMd4HashedBytes = MD4.GetByteHashFromBytes(buffer.Take(bufferLength).ToArray());
md4HashedBytes.AddRange(chunkMd4HashedBytes);
buffer = new byte[CHUNK_SIZE];
}
hash = (chunkCount > 1
? MD4.GetHexHashFromBytes(md4HashedBytes.ToArray())
: MD4.BytesToHex(md4HashedBytes.ToArray(), md4HashedBytes.Count)).ToLower();
}
return(hash);
}
/// <summary>
/// A method for getting a ED2K hash from a specified file path
/// </summary>
/// <param name="file">The FileStream to hash</param>
/// <returns>A string containing the ED2K hash</returns>
public static string GetED2K(FileStream file)
{
byte[] buffer;
const int CHUNK_SIZE = 9728000;
long chunkCount = 0;
List <byte> md4HashedBytes = new List <byte>();
buffer = new byte[CHUNK_SIZE];
int bufferLength;
while ((bufferLength = file.Read(buffer, 0, CHUNK_SIZE)) > 0)
{
++chunkCount;
byte[] chunkMd4HashedBytes = MD4.GetByteHashFromBytes(buffer.Take(bufferLength).ToArray());
md4HashedBytes.AddRange(chunkMd4HashedBytes);
buffer = new byte[CHUNK_SIZE];
}
string hash = (chunkCount > 1
? MD4.GetHexHashFromBytes(md4HashedBytes.ToArray())
: MD4.BytesToHex(md4HashedBytes.ToArray(), md4HashedBytes.Count)).ToLower();
return(hash);
}
