BaseCipherSuitePlugin.SSLv3DeriveBytes.GetBytes C# (CSharp) Method

        public override byte[] GetBytes(int count)
        {
            byte[] ret = new byte[count];

            int filled = 0;
            while (filled < count) {
                if (filled + _hash.Length < count) {
                    /* Copy current hash into results */
                    Array.Copy(_hash, 0, ret, filled, _hash.Length);
                    filled += _hash.Length;

                    /* Calculate the next hash */
                    if (_iteration > 26) {
                        throw new Exception("SSL3 pseudorandom function can't output more bytes");
                    }

                    byte[] header = new byte[_iteration];
                    for (int i=0; i<header.Length; i++) {
                        header[i] = (byte)(64 + _iteration);
                    }

                    _sha1.Initialize();
                    _sha1.TransformBlock(header, 0, header.Length, header, 0);
                    _sha1.TransformBlock(_secret, 0, _secret.Length, _secret, 0);
                    _sha1.TransformFinalBlock(_seed, 0, _seed.Length);
                    byte[] sha1Hash = _sha1.Hash;

                    _md5.Initialize();
                    _md5.TransformBlock(_secret, 0, _secret.Length, _secret, 0);
                    _md5.TransformFinalBlock(sha1Hash, 0, sha1Hash.Length);
                    _hash = _md5.Hash;

                    _iteration++;
                } else {
                    /* Count how many bytes to consume */
                    int consumed = count - filled;

                    /* Make a partial copy of the current hash */
                    Array.Copy(_hash, 0, ret, filled, consumed);
                    filled += consumed;

                    /* Remove read bytes from the current hash */
                    byte[] tmp = new byte[_hash.Length - consumed];
                    Array.Copy(_hash, _hash.Length - tmp.Length, tmp, 0, tmp.Length);
                    _hash = tmp;
                }
            }

            return ret;
        }