| public EncryptMessage ( byte plainText, int length ) : byte[] | ||
| plainText | byte | The plain text buffer. |
| length | int | /// The number of bytes to encrypt. /// Should be less than or equal to plainText.Length. /// |
| return | byte[] | |
public byte[] EncryptMessage(byte[] plainText, int length)
{
if (plainText == null)
throw new ArgumentNullException("plaintext");
if (length > plainText.Length)
throw new ArgumentOutOfRangeException("length",
"Bad length during Encryption: The length parameter must be smaller than or equal to the size of the destination array.");
byte[] cipherText = new byte[length];
for (int i = 0; i < length; i++)
{
byte C = plainText[i];
cipherText[i] = (byte)(plainText[i] ^ MagicByte);
UpdateKeys(C);
}
return cipherText;
}
public override void Write(byte[] buffer, int offset, int count)
{
if (_mode == CryptoMode.Decrypt)
{
throw new NotSupportedException("This stream does not Decrypt via Write()");
}
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
// workitem 7696
if (count == 0)
{
return;
}
byte[] plaintext = null;
if (offset != 0)
{
plaintext = new byte[count];
for (int i = 0; i < count; i++)
{
plaintext[i] = buffer[offset + i];
}
}
else
{
plaintext = buffer;
}
byte[] encrypted = _cipher.EncryptMessage(plaintext, count);
_s.Write(encrypted, 0, encrypted.Length);
}
