/* -------------------------------------------------------------------------- */
void aes_mixColumns(uint8_t *buf)
{
register uint8_t i, a, b, c, d, e;
for (i = 0; i < 16; i += 4)
{
a = buf[i];
b = buf[i + 1];
c = buf[i + 2];
d = buf[i + 3];
e = a ^ b ^ c ^ d;
buf[i] ^= e ^ rj_xtime(a^b);
buf[i+1] ^= e ^ rj_xtime(b^c);
buf[i+2] ^= e ^ rj_xtime(c^d);
buf[i+3] ^= e ^ rj_xtime(d^a);
}
} /* aes_mixColumns */
void Aes256::mix_columns(unsigned char* buffer)
{
register unsigned char i, a, b, c, d, e;
for (i = 0; i < 16; i += 4)
{
a = buffer[i];
b = buffer[i + 1];
c = buffer[i + 2];
d = buffer[i + 3];
e = a ^ b ^ c ^ d;
buffer[i] ^= e ^ rj_xtime(a^b);
buffer[i + 1] ^= e ^ rj_xtime(b^c);
buffer[i + 2] ^= e ^ rj_xtime(c^d);
buffer[i + 3] ^= e ^ rj_xtime(d^a);
}
}
/* -------------------------------------------------------------------------- */
void aes_mixColumns_inv(uint8_t *buf)
{
register uint8_t i, a, b, c, d, e, x, y, z;
for (i = 0; i < 16; i += 4)
{
a = buf[i];
b = buf[i + 1];
c = buf[i + 2];
d = buf[i + 3];
e = a ^ b ^ c ^ d;
z = rj_xtime(e);
x = e ^ rj_xtime(rj_xtime(z^a^c));
y = e ^ rj_xtime(rj_xtime(z^b^d));
buf[i] ^= x ^ rj_xtime(a^b);
buf[i+1] ^= y ^ rj_xtime(b^c);
buf[i+2] ^= x ^ rj_xtime(c^d);
buf[i+3] ^= y ^ rj_xtime(d^a);
}
} /* aes_mixColumns_inv */
void Aes256::mix_columns_inv(unsigned char* buffer)
{
register unsigned char i, a, b, c, d, e, x, y, z;
for (i = 0; i < 16; i += 4)
{
a = buffer[i];
b = buffer[i + 1];
c = buffer[i + 2];
d = buffer[i + 3];
e = a ^ b ^ c ^ d;
z = rj_xtime(e);
x = e ^ rj_xtime(rj_xtime(z^a^c)); y = e ^ rj_xtime(rj_xtime(z^b^d));
buffer[i] ^= x ^ rj_xtime(a^b);
buffer[i + 1] ^= y ^ rj_xtime(b^c);
buffer[i + 2] ^= x ^ rj_xtime(c^d);
buffer[i + 3] ^= y ^ rj_xtime(d^a);
}
}
