/// <summary>ctor</summary>
public AesCtrCryptoTransform(byte[] key, ArraySegment<byte> counterBufferSegment, Func<Aes> aesFactory = null)
{
if (counterBufferSegment.Count != AesConstants.AES_BLOCK_SIZE)
throw new ArgumentException("counterBufferSegment.Count must be " + AesConstants.STR_AES_BLOCK_SIZE + ".");
this.aes = aesFactory == null ? AesFactories.Aes() : aesFactory();
this.aes.Mode = CipherMode.ECB;
this.aes.Padding = PaddingMode.None;
Utils.BlockCopy(counterBufferSegment.Array, counterBufferSegment.Offset, counterBuffer, 0, AesConstants.AES_BLOCK_SIZE);
this.cryptoTransform = aes.CreateEncryptor(rgbKey: key, rgbIV: null);
}// ctor
/// <summary>ctor</summary>
public AesCtrCryptoTransform(byte[] key, ArraySegment<byte> counterBufferSegment, Func<Aes> aesFactory = null)
{
if (counterBufferSegment.Count != AesConstants.AES_BLOCK_SIZE)
ThrowNewArgumentException("counterBufferSegment.Count must be " + AesConstants.STR_AES_BLOCK_SIZE + ".");
var aes = this.aes = aesFactory == null ? AesFactories.Aes() : aesFactory();
(aes.Mode, aes.Padding) = (CipherMode.ECB, PaddingMode.None);
(var counterBufferSegmentArray, var counterBufferSegmentOffset) = (counterBufferSegment.Array, counterBufferSegment.Offset);
System.Diagnostics.Debug.Assert(AesConstants.AES_BLOCK_SIZE == 16);
(Unsafe.As<byte, ulong>(ref this.counterBuffer_KeyStreamBuffer[0]), this.counterStruct.UlongValue) =
Unsafe.As<byte, (ulong, ulong)>(ref counterBufferSegmentArray[counterBufferSegmentOffset]);
if (BitConverter.IsLittleEndian)
this.counterStruct.UlongValue = Utils.ReverseEndianness(this.counterStruct.UlongValue);
this.cryptoTransform = aes.CreateEncryptor(rgbKey: key, rgbIV: null);
}// ctor
/// <summary>ctor</summary>
public AesCtrCryptoTransform(byte[] key, ArraySegment<byte> counterBufferSegment, Func<Aes> aesFactory = null)
{
if (counterBufferSegment.Count != AesConstants.AES_BLOCK_SIZE)
throw new ArgumentException("counterBufferSegment.Count must be " + AesConstants.STR_AES_BLOCK_SIZE + ".");
var aes = aesFactory == null ? AesFactories.Aes() : aesFactory();
aes.Mode = CipherMode.ECB;
aes.Padding = PaddingMode.None;
var counterBufferSegmentArray = counterBufferSegment.Array;
var counterBufferSegmentOffset = counterBufferSegment.Offset;
byte[] counterBuffer_KeyStreamBuffer = this.counterBuffer_KeyStreamBuffer; // looks dumb, but local-access is faster than field-access
System.Diagnostics.Debug.Assert(AesConstants.AES_BLOCK_SIZE == 16);
//Utils.BlockCopy(counterBufferSegment.Array, counterBufferSegment.Offset, counterBuffer_KeyStreamBuffer, 0, AesConstants.AES_BLOCK_SIZE);
counterBuffer_KeyStreamBuffer[00] = counterBufferSegmentArray[counterBufferSegmentOffset + 00];
counterBuffer_KeyStreamBuffer[01] = counterBufferSegmentArray[counterBufferSegmentOffset + 01];
counterBuffer_KeyStreamBuffer[02] = counterBufferSegmentArray[counterBufferSegmentOffset + 02];
counterBuffer_KeyStreamBuffer[03] = counterBufferSegmentArray[counterBufferSegmentOffset + 03];
counterBuffer_KeyStreamBuffer[04] = counterBufferSegmentArray[counterBufferSegmentOffset + 04];
counterBuffer_KeyStreamBuffer[05] = counterBufferSegmentArray[counterBufferSegmentOffset + 05];
counterBuffer_KeyStreamBuffer[06] = counterBufferSegmentArray[counterBufferSegmentOffset + 06];
counterBuffer_KeyStreamBuffer[07] = counterBufferSegmentArray[counterBufferSegmentOffset + 07];
this.counterStruct = new Utils.LongStruct
{
B8 = counterBufferSegmentArray[counterBufferSegmentOffset + 08],
B7 = counterBufferSegmentArray[counterBufferSegmentOffset + 09],
B6 = counterBufferSegmentArray[counterBufferSegmentOffset + 10],
B5 = counterBufferSegmentArray[counterBufferSegmentOffset + 11],
B4 = counterBufferSegmentArray[counterBufferSegmentOffset + 12],
B3 = counterBufferSegmentArray[counterBufferSegmentOffset + 13],
B2 = counterBufferSegmentArray[counterBufferSegmentOffset + 14],
B1 = counterBufferSegmentArray[counterBufferSegmentOffset + 15]
};
this.cryptoTransform = aes.CreateEncryptor(rgbKey: key, rgbIV: null);
this.aes = aes;
}// ctor
