BcTlsBlockCipherImpl
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using System;
namespace Org.BouncyCastle.Tls.Crypto.Impl.BC
{
internal sealed class BcTlsBlockCipherImpl : TlsBlockCipherImpl
{
private readonly bool m_isEncrypting;
private readonly IBlockCipher m_cipher;
private KeyParameter key;
internal BcTlsBlockCipherImpl(IBlockCipher cipher, bool isEncrypting)
{
m_cipher = cipher;
m_isEncrypting = isEncrypting;
}
public void SetKey(byte[] key, int keyOff, int keyLen)
{
this.key = new KeyParameter(key, keyOff, keyLen);
}
public void SetKey(ReadOnlySpan<byte> key)
{
this.key = new KeyParameter(key);
}
public void Init(byte[] iv, int ivOff, int ivLen)
{
m_cipher.Init(m_isEncrypting, new ParametersWithIV(key, iv, ivOff, ivLen));
}
public void Init(ReadOnlySpan<byte> iv)
{
m_cipher.Init(m_isEncrypting, new ParametersWithIV(key, iv));
}
public int DoFinal(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset)
{
int blockSize = m_cipher.GetBlockSize();
for (int i = 0; i < inputLength; i += blockSize) {
m_cipher.ProcessBlock(input, inputOffset + i, output, outputOffset + i);
}
return inputLength;
}
public int GetBlockSize()
{
return m_cipher.GetBlockSize();
}
}
}