| public BlockUpdate ( byte input, int inOff, int len ) : void | ||
| input | byte | |
| inOff | int | |
| len | int | |
| Résultat | void | |
static void PolyUpdateMacText(Macs.Poly1305 poly, byte[] buf)
{
poly.BlockUpdate(buf, 0, buf.Length);
int partial = buf.Length % 16;
if (partial != 0)
{
var zeroPadding = new byte[15];
poly.BlockUpdate(zeroPadding, 0, 16 - partial);
}
}
static void PolyUpdateMacLength(Macs.Poly1305 poly, int len)
{
byte[] longLen = BitConverter.GetBytes((ulong)len);
poly.BlockUpdate(longLen, 0, longLen.Length);
}
private void testSequential()
{
// Sequential test, adapted from test-poly1305aes
int len;
byte[] kr = new byte[32];
byte[] m = new byte[MAXLEN];
byte[] n = new byte[16];
byte[] output = new byte[16];
int c = 0;
IMac mac = new Poly1305(new AesFastEngine());
for (int loop = 0; loop < 13; loop++)
{
len = 0;
for (;;)
{
c++;
mac.Init(new ParametersWithIV(new KeyParameter(kr), n));
mac.BlockUpdate(m, 0, len);
mac.DoFinal(output, 0);
// if (c == 678)
// {
// TestCase tc = CASES[0];
//
// if (!Arrays.AreEqual(tc.key, kr))
// {
// System.err.println("Key bad");
// System.err.println(Hex.ToHexString(tc.key)));
// System.err.println(Hex.ToHexString(kr)));
// System.exit(1);
// }
// if (!Arrays.AreEqual(tc.nonce, n))
// {
// System.err.println("Nonce bad");
// System.exit(1);
// }
// System.out.printf("[%d] m: %s\n", c, Hex.ToHexString(m, 0, len)));
// System.out.printf("[%d] K: %s\n", c, new string(Hex.encodje(kr)));
// System.out.printf("[%d] N: %s\n", c, Hex.ToHexString(n)));
// System.out.printf("[%d] M: ", c);
// }
// System.out.printf("%d/%s\n", c, Hex.ToHexString(out)));
if (len >= MAXLEN)
break;
n[0] = (byte)(n[0] ^ loop);
for (int i = 0; i < 16; ++i)
n[i] ^= output[i];
if (len % 2 != 0)
for (int i = 0; i < 16; ++i)
kr[i] ^= output[i];
if (len % 3 != 0)
for (int i = 0; i < 16; ++i)
kr[i + 16] ^= output[i];
Poly1305KeyGenerator.Clamp(kr);
m[len++] ^= output[0];
}
}
// Output after 13 loops as generated by poly1305 ref
if (c != 13013 || !Arrays.AreEqual(output, Hex.Decode("c96f60a23701a5b0fd2016f58cbe4f7e")))
{
Fail("Sequential Poly1305 " + c, "c96f60a23701a5b0fd2016f58cbe4f7e", Hex.ToHexString(output));
}
}
private void testReset()
{
CipherKeyGenerator gen = new Poly1305KeyGenerator();
gen.Init(new KeyGenerationParameters(new SecureRandom(), 256));
byte[] k = gen.GenerateKey();
byte[] m = new byte[10000];
byte[] check = new byte[16];
byte[] output = new byte[16];
// Generate baseline
IMac poly = new Poly1305(new AesFastEngine());
poly.Init(new ParametersWithIV(new KeyParameter(k), new byte[16]));
poly.BlockUpdate(m, 0, m.Length);
poly.DoFinal(check, 0);
// Check reset after doFinal
poly.BlockUpdate(m, 0, m.Length);
poly.DoFinal(output, 0);
if (!Arrays.AreEqual(check, output))
{
Fail("Mac not reset after doFinal");
}
// Check reset
poly.Update((byte)1);
poly.Update((byte)2);
poly.Reset();
poly.BlockUpdate(m, 0, m.Length);
poly.DoFinal(output, 0);
if (!Arrays.AreEqual(check, output))
{
Fail("Mac not reset after doFinal");
}
// Check init resets
poly.Update((byte)1);
poly.Update((byte)2);
poly.Init(new ParametersWithIV(new KeyParameter(k), new byte[16]));
poly.BlockUpdate(m, 0, m.Length);
poly.DoFinal(output, 0);
if (!Arrays.AreEqual(check, output))
{
Fail("Mac not reset after doFinal");
}
}
private void CheckVector(byte[] keyMaterial, byte[] input, byte[] tag)
{
Poly1305 poly1305 = new Poly1305();
poly1305.Init(new KeyParameter(keyMaterial));
poly1305.BlockUpdate(input, 0, input.Length);
byte[] mac = new byte[poly1305.GetMacSize()];
poly1305.DoFinal(mac, 0);
if (!Arrays.AreEqual(tag, mac))
{
Fail("rfc7539", Hex.ToHexString(tag), Hex.ToHexString(mac));
}
}