HashProviderBase
using System;
namespace SshNet.Security.Cryptography
{
internal abstract class HashProviderBase : IHashProvider, IDisposable
{
private bool _disposed;
private byte[] _hashValue;
public byte[] Hash {
get {
if (_disposed)
throw new ObjectDisposedException(GetType().FullName);
return (byte[])_hashValue.Clone();
}
}
public abstract int HashSize { get; }
public abstract int InputBlockSize { get; }
public abstract int OutputBlockSize { get; }
public int TransformBlock(byte[] inputBuffer, int inputOffset, int inputCount, byte[] outputBuffer, int outputOffset)
{
if (_disposed)
throw new ObjectDisposedException(GetType().FullName);
if (inputBuffer == null)
throw new ArgumentNullException("inputBuffer");
if (inputOffset < 0)
throw new ArgumentOutOfRangeException("inputOffset");
if (inputCount < 0 || inputCount > inputBuffer.Length)
throw new ArgumentException("XX");
if (inputBuffer.Length - inputCount < inputOffset)
throw new ArgumentException("xx");
HashCore(inputBuffer, inputOffset, inputCount);
Buffer.BlockCopy(inputBuffer, inputOffset, outputBuffer, outputOffset, inputCount);
return inputCount;
}
public byte[] TransformFinalBlock(byte[] inputBuffer, int inputOffset, int inputCount)
{
if (_disposed)
throw new ObjectDisposedException(GetType().FullName);
if (inputBuffer == null)
throw new ArgumentNullException("inputBuffer");
if (inputOffset < 0)
throw new ArgumentOutOfRangeException("inputOffset");
if (inputCount < 0 || inputCount > inputBuffer.Length)
throw new ArgumentException("XX");
if (inputBuffer.Length - inputCount < inputOffset)
throw new ArgumentException("xx");
HashCore(inputBuffer, inputOffset, inputCount);
_hashValue = HashFinal();
byte[] array = new byte[inputCount];
Buffer.BlockCopy(inputBuffer, inputOffset, array, 0, inputCount);
return array;
}
public byte[] ComputeHash(byte[] buffer)
{
if (_disposed)
throw new ObjectDisposedException(GetType().FullName);
if (buffer == null)
throw new ArgumentNullException("buffer");
HashCore(buffer, 0, buffer.Length);
_hashValue = HashFinal();
Reset();
return Hash;
}
public void Dispose()
{
GC.SuppressFinalize(this);
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
_hashValue = null;
_disposed = true;
}
public abstract void Reset();
public abstract void HashCore(byte[] array, int ibStart, int cbSize);
public abstract byte[] HashFinal();
}
}