public byte[] Decrypt(byte[] chiphertext)
{
AESBlock chipherBlock = new AESBlock(chiphertext);
AESBlock plainBlock = Decrypt(chipherBlock);
return(plainBlock.data);
}
public void AddRoundKey(AESBlock rkey)
{
for (int i = 0; i < BLOCK_SIZE; ++i)
{
data[i] ^= rkey.data[i];
}
}
public byte[] Encrypt(byte[] plaintext)
{
AESBlock plainBlock = new AESBlock(plaintext);
AESBlock chipherBlock = Encrypt(plainBlock);
return(chipherBlock.data);
}
public AESBlock(AESBlock block)
{
data = new byte[BLOCK_SIZE];
for (int i = 0; i < BLOCK_SIZE; ++i)
{
data[i] = block.data[i];
}
}
private void GenerateSubKeys()
{
roundKeys[0] = new AESBlock(key);
for (int i = 0; i < ROUND_NO; ++i)
{
roundKeys[i + 1] = new AESBlock(roundKeys[i]);
roundKeys[i + 1].KeyTransform(roundCoefficient[i]);
}
}
public AES(byte[] key)
{
this.key = new AESBlock(key);
for (int i = 0; i < ROUND_NO + 1; ++i)
{
roundKeys[i] = new AESBlock();
}
GenerateSubKeys();
}
public AESBlock Decrypt(AESBlock chipherBlock)
{
AESBlock outputBlock = new AESBlock(chipherBlock);
for (int r = 0; r < ROUND_NO; ++r)
{
outputBlock.AddRoundKey(roundKeys[ROUND_NO - r]);
if (r > 0)
{
outputBlock.inverseMixColumns();
}
outputBlock.InverseShiftRows();
outputBlock.SubBytesInverse();
}
outputBlock.AddRoundKey(roundKeys[0]);
return(outputBlock);
}
public AESBlock Encrypt(AESBlock inputBlock)
{
AESBlock chipherBlock = new AESBlock(inputBlock);
chipherBlock.AddRoundKey(roundKeys[0]);
for (int r = 0; r < ROUND_NO; ++r)
{
chipherBlock.SubBytesForward();
chipherBlock.ShiftRows();
if (r < ROUND_NO - 1)
{
chipherBlock.MixColumns();
}
chipherBlock.AddRoundKey(roundKeys[r + 1]);
}
return(chipherBlock);
}
static void Main(string[] args)
{
//AES
AESBlock input1 = new AESBlock(new byte[] { 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 });
Console.WriteLine("AES:");
Console.WriteLine("\tInput block: " + input1.ToString());
AES aes = new AES(new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 });
AESBlock chipheredBlock1 = aes.Encrypt(input1);
Console.WriteLine("\tEncripted block: " + chipheredBlock1.ToString());
AESBlock output1 = aes.Decrypt(chipheredBlock1);
Console.WriteLine("\tDecripted vlock: " + output1.ToString());
//Kalyna
KalynaBlock input2 = new KalynaBlock(new byte[] { 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 });
Console.WriteLine("Kalyna:");
Console.WriteLine("\tInput block: " + input2.ToString());
Kalyna kalyna = new Kalyna(new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 });
KalynaBlock chipheredBlock2 = kalyna.Encrypt(input2);
Console.WriteLine("\tEncripted block: " + chipheredBlock2.ToString());
KalynaBlock output2 = kalyna.Decrypt(chipheredBlock2);
Console.WriteLine("\tDecripted vlock: " + output2.ToString());
var rootpath = Directory.GetCurrentDirectory();
var inpFileName = "Lorem_ipsum.pdf";
//AES
{
Console.WriteLine("AES:");
FileChipherer chipherer = new FileChipherer(ChiphererAlgo.AES, new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 });
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
chipherer.Encrypt(Path.Combine(rootpath, inpFileName), Path.Combine(rootpath, "Encr_" + inpFileName));
stopwatch.Stop();
Console.WriteLine($"\tSpent {stopwatch.ElapsedMilliseconds} ms to encrypt");
stopwatch.Reset();
stopwatch.Start();
chipherer.Decrypt(Path.Combine(rootpath, "Encr_" + inpFileName), Path.Combine(rootpath, "Decr_" + inpFileName));
stopwatch.Stop();
Console.WriteLine($"\tSpent {stopwatch.ElapsedMilliseconds} ms to decrypt");
}
//Kalyna
{
Console.WriteLine("Kalyna:");
FileChipherer chipherer = new FileChipherer(ChiphererAlgo.Kalyna, new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 });
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
chipherer.Encrypt(Path.Combine(rootpath, inpFileName), Path.Combine(rootpath, "Encr_" + inpFileName));
stopwatch.Stop();
Console.WriteLine($"\tSpent {stopwatch.ElapsedMilliseconds} ms to encrypt");
stopwatch.Reset();
stopwatch.Start();
chipherer.Decrypt(Path.Combine(rootpath, "Encr_" + inpFileName), Path.Combine(rootpath, "Decr_" + inpFileName));
stopwatch.Stop();
Console.WriteLine($"\tSpent {stopwatch.ElapsedMilliseconds} ms to decrypt");
}
Console.ReadKey();
}
