public void TestMixColumns()
{
string s = "12345689abcdefgh";
byte[] expectedStateData = { 0x33, 0x34, 0x39, 0x3a,
0x31, 0x28, 0x38, 0x23,
0x63, 0x64, 0x69, 0x6a,
0x6f, 0x68, 0x75, 0x7e };
State expectedState = new State(expectedStateData);
Encoding encoding = Encoding.UTF8;
byte[] inputPlain = encoding.GetBytes(s);
State start = new State(inputPlain);
start = start.mixColumns();
Console.Out.WriteLine("mix:\n" + start);
Assert.AreEqual(start.ToString(), expectedState.ToString());
}
public void TestShiftRows()
{
string s = "12345689abcdefgh";
byte[] expectedStateData = { 0x31, 0x36, 0x63, 0x68,
0x35, 0x62, 0x67, 0x34,
0x61, 0x66, 0x33, 0x39,
0x65, 0x32, 0x38, 0x64 };
State expectedState = new State(expectedStateData);
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
byte[] inputPlain = encoding.GetBytes(s);
State start = new State(inputPlain);
start = start.shiftRows();
Console.Out.WriteLine("shift:\n" + start);
Assert.AreEqual(start.ToString(), expectedState.ToString());
}
public void TestSubBytes()
{
// test vector: according to Casper Schellekens
string s = "12345689abcdefgh";
byte[] expectedStateData = { 0xc7, 0x23, 0xc3, 0x18,
0x96, 0x05, 0x07, 0x12,
0xef, 0xaa, 0xfb, 0x43,
0x4d, 0x33, 0x85, 0x45 };
State expectedState = new State(expectedStateData);
System.Text.Encoding encoding = System.Text.Encoding.UTF8;
byte[] inputPlain = encoding.GetBytes(s);
State start = new State(inputPlain);
start = start.subBytes();
Console.Out.WriteLine("subBytes:\n" + start);
Assert.AreEqual(start.ToString(), expectedState.ToString());
}
public void TestAddRoundKey0()
{
string s = "12345689abcdefgh";
byte[] inputKey = { 0x11, 0x22, 0x33, 0x44,
0x55, 0x66, 0x77, 0x88,
0x99, 0x00, 0xaa, 0xbb,
0xcc, 0xdd, 0xee, 0xff };
byte[] expectedStateData = { 32, 16, 0, 112, 96, 80, 79, 177, 248, 98, 201, 223, 169, 187, 137, 151 };
State expectedState = new State(expectedStateData);
Encoding encoding = Encoding.UTF8;
byte[] inputPlain = encoding.GetBytes(s);
Key key = new Key(inputKey);
State start = new State(inputPlain);
start = start.addRoundKey(key, 0);
Console.Out.WriteLine("add0:\n" + start);
Assert.AreEqual(start.ToString(), expectedState.ToString());
}
public void TestMixColumnsInv()
{
string s = "12345689abcdefgh";
byte[] expectedStateData = { 0x1b, 0x0c, 0x11, 0x02,
0x15, 0x04, 0x1c, 0x0f,
0x4b, 0x5c, 0x41, 0x52,
0x07, 0x30, 0x1d, 0x26 };
State expectedState = new State(expectedStateData);
Encoding encoding = Encoding.UTF8;
byte[] inputPlain = encoding.GetBytes(s);
State start = new State(inputPlain);
start = start.mixColumnsInv();
Console.Out.WriteLine("mix:\n" + start);
Assert.AreEqual(start.ToString(), expectedState.ToString());
}
public void TestSubBytesInv()
{
string s = "12345689abcdefgh";
byte[] expectedStateData = { 0x2e, 0xa1, 0x66, 0x28,
0xd9, 0x24, 0x76, 0x5b,
0xd8, 0xab, 0x00, 0x8c,
0xbc, 0xd3, 0x0a, 0xf7 };
State expectedState = new State(expectedStateData);
Encoding encoding = Encoding.UTF8;
byte[] inputPlain = encoding.GetBytes(s);
State start = new State(inputPlain);
start = start.subBytesInv();
Console.Out.WriteLine("subBytes:\n" + start);
Assert.AreEqual(start.ToString(), expectedState.ToString());
}
public void TestShiftRowsInv()
{
string s = "12345689abcdefgh";
byte[] expectedStateData = { 0x31, 0x66, 0x63, 0x39,
0x35,0x32,0x67,0x64,
0x61,0x36,0x33,0x68,
0x65,0x62,0x38,0x34 };
State expectedState = new State(expectedStateData);
Encoding encoding = Encoding.UTF8;
byte[] inputPlain = encoding.GetBytes(s);
State start = new State(inputPlain);
start = start.shiftRowsInv();
Assert.AreEqual(start.ToString(), expectedState.ToString());
}
public void TestAddRoundKey7()
{
string s = "12345689abcdefgh";
byte[] inputKey = { 0x11, 0x22, 0x33, 0x44,
0x55, 0x66, 0x77, 0x88,
0x99, 0x00, 0xaa, 0xbb,
0xcc, 0xdd, 0xee, 0xff };
byte[] expectedStateData = { 42, 45, 180, 25, 155, 188, 117, 243, 155, 228, 10, 60, 124, 122, 249, 208 };
State expectedState = new State(expectedStateData);
Encoding encoding = Encoding.UTF8;
byte[] inputPlain = encoding.GetBytes(s);
Key key = new Key(inputKey);
State start = new State(inputPlain);
start = start.addRoundKey(key, 7);
Console.Out.WriteLine("add7:\n" + start);
Assert.AreEqual(start.ToString(), expectedState.ToString());
}
public State addRoundKey(Key key, int round)
{
State s = new State();
for (int c = 0; c < nrofCol; c++)
{
for (int r = 0; r < nrofRow; r++)
{
s.buf[r, c] = (byte)(buf[r, c] ^ key.w[r, c + 4 * round]);
}
}
return (s);
}
public State mixColumnsInv()
{
State s = new State();
for (int c = 0; c < nrofCol; c++)
{
s.buf[0, c] = (byte)(mul14[buf[0, c]] ^ mul11[buf[1, c]] ^ mul13[buf[2, c]] ^ mul09[buf[3, c]]);
s.buf[1, c] = (byte)(mul09[buf[0, c]] ^ mul14[buf[1, c]] ^ mul11[buf[2, c]] ^ mul13[buf[3, c]]);
s.buf[2, c] = (byte)(mul13[buf[0, c]] ^ mul09[buf[1, c]] ^ mul14[buf[2, c]] ^ mul11[buf[3, c]]);
s.buf[3, c] = (byte)(mul11[buf[0, c]] ^ mul13[buf[1, c]] ^ mul09[buf[2, c]] ^ mul14[buf[3, c]]);
}
return (s);
}
public State shiftRowsInv()
{
State s = new State();
for (int i = 0; i < nrofRow; i++)
{
for (int j = 0; j < nrofCol; j++)
{
s.buf[i, (i + j) % 4] = buf[i, j];
}
}
return (s);
}
public State subBytesInv()
{
State s = new State();
for (int i = 0; i < nrofRow; i++)
{
for (int j = 0; j < nrofCol; j++)
{
s.buf[i, j] = Sbox.inverseSbox[buf[i, j]];
}
}
return (s);
}
public State mixColumns()
{
State s = new State();
for (int c = 0; c < nrofCol; c++)
{
s.buf[0, c] = (byte)(mul2[buf[0, c]] ^ mul3[buf[1, c]] ^ buf[2, c] ^ buf[3, c]);
s.buf[1, c] = (byte)(buf[0, c] ^ mul2[buf[1, c]] ^ mul3[buf[2, c]] ^ buf[3, c]);
s.buf[2, c] = (byte)(buf[0, c] ^ buf[1, c] ^ mul2[buf[2, c]] ^ mul3[buf[3, c]]);
s.buf[3, c] = (byte)(mul3[buf[0, c]] ^ buf[1, c] ^ buf[2, c] ^ mul2[buf[3, c]]);
}
return (s);
}
