namespace com.hitrust.Security.Cryptography
{
    using System;
    using System.Security.Cryptography;

    public sealed class ARCFourManaged : RC4
    {
        private bool m_IsDisposed = false;

        public override ICryptoTransform CreateDecryptor(byte[] rgbKey, byte[] rgbIV)
        {
            if (this.m_IsDisposed)
            {
                throw new ObjectDisposedException(base.GetType().FullName);
            }
            if (rgbKey == null)
            {
                throw new ArgumentNullException("Key is a null reference.");
            }
            if ((rgbKey.Length == 0) || (rgbKey.Length > 0x100))
            {
                throw new CryptographicException("Invalid Key.");
            }
            if ((rgbIV != null) && (rgbIV.Length > 1))
            {
                throw new CryptographicException("Invalid Initialization Vector.");
            }
            return new ARCFourManagedTransform(rgbKey);
        }

        public override ICryptoTransform CreateEncryptor(byte[] rgbKey, byte[] rgbIV)
        {
            return this.CreateDecryptor(rgbKey, rgbIV);
        }

        protected override void Dispose(bool disposing)
        {
            base.Dispose(true);
            this.m_IsDisposed = true;
        }
    }
}