| private static bytes2uint ( byte src, int offset ) : uint | ||
| src | byte | |
| offset | int | |
| Résultat | uint | |
private int processBlock192or256(byte[] input, int inOff, byte[] output, int outOff)
{
for (int i = 0; i < 4; i++)
{
this.state[i] = CamelliaEngine.bytes2uint(input, inOff + i * 4);
this.state[i] ^= this.kw[i];
}
CamelliaEngine.camelliaF2(this.state, this.subkey, 0);
CamelliaEngine.camelliaF2(this.state, this.subkey, 4);
CamelliaEngine.camelliaF2(this.state, this.subkey, 8);
CamelliaEngine.camelliaFLs(this.state, this.ke, 0);
CamelliaEngine.camelliaF2(this.state, this.subkey, 12);
CamelliaEngine.camelliaF2(this.state, this.subkey, 16);
CamelliaEngine.camelliaF2(this.state, this.subkey, 20);
CamelliaEngine.camelliaFLs(this.state, this.ke, 4);
CamelliaEngine.camelliaF2(this.state, this.subkey, 24);
CamelliaEngine.camelliaF2(this.state, this.subkey, 28);
CamelliaEngine.camelliaF2(this.state, this.subkey, 32);
CamelliaEngine.camelliaFLs(this.state, this.ke, 8);
CamelliaEngine.camelliaF2(this.state, this.subkey, 36);
CamelliaEngine.camelliaF2(this.state, this.subkey, 40);
CamelliaEngine.camelliaF2(this.state, this.subkey, 44);
this.state[2] ^= this.kw[4];
this.state[3] ^= this.kw[5];
this.state[0] ^= this.kw[6];
this.state[1] ^= this.kw[7];
CamelliaEngine.uint2bytes(this.state[2], output, outOff);
CamelliaEngine.uint2bytes(this.state[3], output, outOff + 4);
CamelliaEngine.uint2bytes(this.state[0], output, outOff + 8);
CamelliaEngine.uint2bytes(this.state[1], output, outOff + 12);
return(16);
}
private void setKey(bool forEncryption, byte[] key)
{
uint[] array = new uint[8];
uint[] array2 = new uint[4];
uint[] array3 = new uint[4];
uint[] array4 = new uint[4];
int num = key.Length;
if (num != 16)
{
if (num != 24)
{
if (num != 32)
{
throw new ArgumentException("key sizes are only 16/24/32 bytes.");
}
array[0] = CamelliaEngine.bytes2uint(key, 0);
array[1] = CamelliaEngine.bytes2uint(key, 4);
array[2] = CamelliaEngine.bytes2uint(key, 8);
array[3] = CamelliaEngine.bytes2uint(key, 12);
array[4] = CamelliaEngine.bytes2uint(key, 16);
array[5] = CamelliaEngine.bytes2uint(key, 20);
array[6] = CamelliaEngine.bytes2uint(key, 24);
array[7] = CamelliaEngine.bytes2uint(key, 28);
this._keyIs128 = false;
}
else
{
array[0] = CamelliaEngine.bytes2uint(key, 0);
array[1] = CamelliaEngine.bytes2uint(key, 4);
array[2] = CamelliaEngine.bytes2uint(key, 8);
array[3] = CamelliaEngine.bytes2uint(key, 12);
array[4] = CamelliaEngine.bytes2uint(key, 16);
array[5] = CamelliaEngine.bytes2uint(key, 20);
array[6] = ~array[4];
array[7] = ~array[5];
this._keyIs128 = false;
}
}
else
{
this._keyIs128 = true;
array[0] = CamelliaEngine.bytes2uint(key, 0);
array[1] = CamelliaEngine.bytes2uint(key, 4);
array[2] = CamelliaEngine.bytes2uint(key, 8);
array[3] = CamelliaEngine.bytes2uint(key, 12);
array[4] = (array[5] = (array[6] = (array[7] = 0u)));
}
for (int i = 0; i < 4; i++)
{
array2[i] = (array[i] ^ array[i + 4]);
}
CamelliaEngine.camelliaF2(array2, CamelliaEngine.SIGMA, 0);
for (int j = 0; j < 4; j++)
{
array2[j] ^= array[j];
}
CamelliaEngine.camelliaF2(array2, CamelliaEngine.SIGMA, 4);
if (this._keyIs128)
{
if (forEncryption)
{
this.kw[0] = array[0];
this.kw[1] = array[1];
this.kw[2] = array[2];
this.kw[3] = array[3];
CamelliaEngine.roldq(15, array, 0, this.subkey, 4);
CamelliaEngine.roldq(30, array, 0, this.subkey, 12);
CamelliaEngine.roldq(15, array, 0, array4, 0);
this.subkey[18] = array4[2];
this.subkey[19] = array4[3];
CamelliaEngine.roldq(17, array, 0, this.ke, 4);
CamelliaEngine.roldq(17, array, 0, this.subkey, 24);
CamelliaEngine.roldq(17, array, 0, this.subkey, 32);
this.subkey[0] = array2[0];
this.subkey[1] = array2[1];
this.subkey[2] = array2[2];
this.subkey[3] = array2[3];
CamelliaEngine.roldq(15, array2, 0, this.subkey, 8);
CamelliaEngine.roldq(15, array2, 0, this.ke, 0);
CamelliaEngine.roldq(15, array2, 0, array4, 0);
this.subkey[16] = array4[0];
this.subkey[17] = array4[1];
CamelliaEngine.roldq(15, array2, 0, this.subkey, 20);
CamelliaEngine.roldqo32(34, array2, 0, this.subkey, 28);
CamelliaEngine.roldq(17, array2, 0, this.kw, 4);
return;
}
this.kw[4] = array[0];
this.kw[5] = array[1];
this.kw[6] = array[2];
this.kw[7] = array[3];
CamelliaEngine.decroldq(15, array, 0, this.subkey, 28);
CamelliaEngine.decroldq(30, array, 0, this.subkey, 20);
CamelliaEngine.decroldq(15, array, 0, array4, 0);
this.subkey[16] = array4[0];
this.subkey[17] = array4[1];
CamelliaEngine.decroldq(17, array, 0, this.ke, 0);
CamelliaEngine.decroldq(17, array, 0, this.subkey, 8);
CamelliaEngine.decroldq(17, array, 0, this.subkey, 0);
this.subkey[34] = array2[0];
this.subkey[35] = array2[1];
this.subkey[32] = array2[2];
this.subkey[33] = array2[3];
CamelliaEngine.decroldq(15, array2, 0, this.subkey, 24);
CamelliaEngine.decroldq(15, array2, 0, this.ke, 4);
CamelliaEngine.decroldq(15, array2, 0, array4, 0);
this.subkey[18] = array4[2];
this.subkey[19] = array4[3];
CamelliaEngine.decroldq(15, array2, 0, this.subkey, 12);
CamelliaEngine.decroldqo32(34, array2, 0, this.subkey, 4);
CamelliaEngine.roldq(17, array2, 0, this.kw, 0);
return;
}
else
{
for (int k = 0; k < 4; k++)
{
array3[k] = (array2[k] ^ array[k + 4]);
}
CamelliaEngine.camelliaF2(array3, CamelliaEngine.SIGMA, 8);
if (forEncryption)
{
this.kw[0] = array[0];
this.kw[1] = array[1];
this.kw[2] = array[2];
this.kw[3] = array[3];
CamelliaEngine.roldqo32(45, array, 0, this.subkey, 16);
CamelliaEngine.roldq(15, array, 0, this.ke, 4);
CamelliaEngine.roldq(17, array, 0, this.subkey, 32);
CamelliaEngine.roldqo32(34, array, 0, this.subkey, 44);
CamelliaEngine.roldq(15, array, 4, this.subkey, 4);
CamelliaEngine.roldq(15, array, 4, this.ke, 0);
CamelliaEngine.roldq(30, array, 4, this.subkey, 24);
CamelliaEngine.roldqo32(34, array, 4, this.subkey, 36);
CamelliaEngine.roldq(15, array2, 0, this.subkey, 8);
CamelliaEngine.roldq(30, array2, 0, this.subkey, 20);
this.ke[8] = array2[1];
this.ke[9] = array2[2];
this.ke[10] = array2[3];
this.ke[11] = array2[0];
CamelliaEngine.roldqo32(49, array2, 0, this.subkey, 40);
this.subkey[0] = array3[0];
this.subkey[1] = array3[1];
this.subkey[2] = array3[2];
this.subkey[3] = array3[3];
CamelliaEngine.roldq(30, array3, 0, this.subkey, 12);
CamelliaEngine.roldq(30, array3, 0, this.subkey, 28);
CamelliaEngine.roldqo32(51, array3, 0, this.kw, 4);
return;
}
this.kw[4] = array[0];
this.kw[5] = array[1];
this.kw[6] = array[2];
this.kw[7] = array[3];
CamelliaEngine.decroldqo32(45, array, 0, this.subkey, 28);
CamelliaEngine.decroldq(15, array, 0, this.ke, 4);
CamelliaEngine.decroldq(17, array, 0, this.subkey, 12);
CamelliaEngine.decroldqo32(34, array, 0, this.subkey, 0);
CamelliaEngine.decroldq(15, array, 4, this.subkey, 40);
CamelliaEngine.decroldq(15, array, 4, this.ke, 8);
CamelliaEngine.decroldq(30, array, 4, this.subkey, 20);
CamelliaEngine.decroldqo32(34, array, 4, this.subkey, 8);
CamelliaEngine.decroldq(15, array2, 0, this.subkey, 36);
CamelliaEngine.decroldq(30, array2, 0, this.subkey, 24);
this.ke[2] = array2[1];
this.ke[3] = array2[2];
this.ke[0] = array2[3];
this.ke[1] = array2[0];
CamelliaEngine.decroldqo32(49, array2, 0, this.subkey, 4);
this.subkey[46] = array3[0];
this.subkey[47] = array3[1];
this.subkey[44] = array3[2];
this.subkey[45] = array3[3];
CamelliaEngine.decroldq(30, array3, 0, this.subkey, 32);
CamelliaEngine.decroldq(30, array3, 0, this.subkey, 16);
CamelliaEngine.roldqo32(51, array3, 0, this.kw, 0);
return;
}
}