public virtual ITestResult Perform()
{
KeyParameter key = new KeyParameter(keyBytes);
IBlockCipher cipher = new DesEngine();
IMac mac = new CbcBlockCipherMac(cipher);
//
// standard DAC - zero IV
//
mac.Init(key);
mac.BlockUpdate(input1, 0, input1.Length);
byte[] outBytes = new byte[4];
mac.DoFinal(outBytes, 0);
if (!Arrays.AreEqual(outBytes, output1))
{
return(new SimpleTestResult(false, Name + ": Failed - expected "
+ Hex.ToHexString(output1) + " got " + Hex.ToHexString(outBytes)));
}
//
// mac with IV.
//
ParametersWithIV param = new ParametersWithIV(key, ivBytes);
mac.Init(param);
mac.BlockUpdate(input1, 0, input1.Length);
outBytes = new byte[4];
mac.DoFinal(outBytes, 0);
if (!Arrays.AreEqual(outBytes, output2))
{
return(new SimpleTestResult(false, Name + ": Failed - expected "
+ Hex.ToHexString(output2) + " got " + Hex.ToHexString(outBytes)));
}
//
// CFB mac with IV - 8 bit CFB mode
//
param = new ParametersWithIV(key, ivBytes);
mac = new CfbBlockCipherMac(cipher);
mac.Init(param);
mac.BlockUpdate(input1, 0, input1.Length);
outBytes = new byte[4];
mac.DoFinal(outBytes, 0);
if (!Arrays.AreEqual(outBytes, output3))
{
return(new SimpleTestResult(false, Name + ": Failed - expected "
+ Hex.ToHexString(output3) + " got " + Hex.ToHexString(outBytes)));
}
//
// word aligned data - zero IV
//
mac.Init(key);
mac.BlockUpdate(input2, 0, input2.Length);
outBytes = new byte[4];
mac.DoFinal(outBytes, 0);
if (!Arrays.AreEqual(outBytes, output4))
{
return(new SimpleTestResult(false, Name + ": Failed - expected "
+ Hex.ToHexString(output4) + " got " + Hex.ToHexString(outBytes)));
}
//
// word aligned data - zero IV - CBC padding
//
mac = new CbcBlockCipherMac(cipher, new Pkcs7Padding());
mac.Init(key);
mac.BlockUpdate(input2, 0, input2.Length);
outBytes = new byte[4];
mac.DoFinal(outBytes, 0);
if (!Arrays.AreEqual(outBytes, output5))
{
return(new SimpleTestResult(false, Name + ": Failed - expected "
+ Hex.ToHexString(output5) + " got " + Hex.ToHexString(outBytes)));
}
//
// non-word aligned data - zero IV - CBC padding
//
mac.Reset();
mac.BlockUpdate(input1, 0, input1.Length);
outBytes = new byte[4];
mac.DoFinal(outBytes, 0);
if (!Arrays.AreEqual(outBytes, output6))
{
return(new SimpleTestResult(false, Name + ": Failed - expected "
+ Hex.ToHexString(output6) + " got " + Hex.ToHexString(outBytes)));
}
//
// non-word aligned data - zero IV - CBC padding
//
mac.Init(key);
mac.BlockUpdate(input1, 0, input1.Length);
outBytes = new byte[4];
mac.DoFinal(outBytes, 0);
if (!Arrays.AreEqual(outBytes, output6))
{
return(new SimpleTestResult(false, Name + ": Failed - expected "
+ Hex.ToHexString(output6) + " got " + Hex.ToHexString(outBytes)));
}
return(new SimpleTestResult(true, Name + ": Okay"));
}
private int calculateMac(byte[] data, int dataOff, int dataLen, byte[] macBlock)
{
IMac cMac = new CbcBlockCipherMac(cipher, macSize * 8);
cMac.Init(keyParam);
//
// build b0
//
byte[] b0 = new byte[16];
if (HasAssociatedText())
{
b0[0] |= 0x40;
}
b0[0] |= (byte)((((cMac.GetMacSize() - 2) / 2) & 0x7) << 3);
b0[0] |= (byte)(((15 - nonce.Length) - 1) & 0x7);
Array.Copy(nonce, 0, b0, 1, nonce.Length);
int q = dataLen;
int count = 1;
while (q > 0)
{
b0[b0.Length - count] = (byte)(q & 0xff);
q >>= 8;
count++;
}
cMac.BlockUpdate(b0, 0, b0.Length);
//
// process associated text
//
if (HasAssociatedText())
{
int extra;
int textLength = GetAssociatedTextLength();
if (textLength < ((1 << 16) - (1 << 8)))
{
cMac.Update((byte)(textLength >> 8));
cMac.Update((byte)textLength);
extra = 2;
}
else // can't go any higher than 2^32
{
cMac.Update((byte)0xff);
cMac.Update((byte)0xfe);
cMac.Update((byte)(textLength >> 24));
cMac.Update((byte)(textLength >> 16));
cMac.Update((byte)(textLength >> 8));
cMac.Update((byte)textLength);
extra = 6;
}
if (initialAssociatedText != null)
{
cMac.BlockUpdate(initialAssociatedText, 0, initialAssociatedText.Length);
}
if (associatedText.Position > 0)
{
cMac.BlockUpdate(associatedText.ToArray() /*GetBuffer()*/, 0, (int)associatedText.Position);
}
extra = (extra + textLength) % 16;
if (extra != 0)
{
for (int i = extra; i < 16; ++i)
{
cMac.Update((byte)0x00);
}
}
}
//
// add the text
//
cMac.BlockUpdate(data, dataOff, dataLen);
return(cMac.DoFinal(macBlock, 0));
}
private int CalculateMac(byte[] data, int dataOff, int dataLen, byte[] macBlock)
{
IMac mac = new CbcBlockCipherMac(cipher, macSize * 8);
mac.Init(keyParam);
byte[] array = new byte[16];
byte[] array2;
if (HasAssociatedText())
{
(array2 = array)[0] = (byte)(array2[0] | 0x40u);
}
(array2 = array)[0] = (byte)(array2[0] | (byte)((((mac.GetMacSize() - 2) / 2) & 7) << 3));
(array2 = array)[0] = (byte)(array2[0] | (byte)((uint)(15 - nonce.Length - 1) & 7u));
global::System.Array.Copy((global::System.Array)nonce, 0, (global::System.Array)array, 1, nonce.Length);
int num = dataLen;
int num2 = 1;
while (num > 0)
{
array[array.Length - num2] = (byte)((uint)num & 0xFFu);
num >>= 8;
num2++;
}
mac.BlockUpdate(array, 0, array.Length);
if (HasAssociatedText())
{
int associatedTextLength = GetAssociatedTextLength();
int num3;
if (associatedTextLength < 65280)
{
mac.Update((byte)(associatedTextLength >> 8));
mac.Update((byte)associatedTextLength);
num3 = 2;
}
else
{
mac.Update(255);
mac.Update(254);
mac.Update((byte)(associatedTextLength >> 24));
mac.Update((byte)(associatedTextLength >> 16));
mac.Update((byte)(associatedTextLength >> 8));
mac.Update((byte)associatedTextLength);
num3 = 6;
}
if (initialAssociatedText != null)
{
mac.BlockUpdate(initialAssociatedText, 0, initialAssociatedText.Length);
}
if (((Stream)associatedText).get_Position() > 0)
{
byte[] buffer = associatedText.GetBuffer();
int len = (int)((Stream)associatedText).get_Position();
mac.BlockUpdate(buffer, 0, len);
}
num3 = (num3 + associatedTextLength) % 16;
if (num3 != 0)
{
for (int i = num3; i < 16; i++)
{
mac.Update(0);
}
}
}
mac.BlockUpdate(data, dataOff, dataLen);
return(mac.DoFinal(macBlock, 0));
}