AES_RETURN aes_decrypt_key256(const unsigned char *key, aes_decrypt_ctx cx[1])
{ uint_32t ss[9];
#if defined( d_vars )
d_vars;
#endif
cx->ks[v(56,(0))] = ss[0] = word_in(key, 0);
cx->ks[v(56,(1))] = ss[1] = word_in(key, 1);
cx->ks[v(56,(2))] = ss[2] = word_in(key, 2);
cx->ks[v(56,(3))] = ss[3] = word_in(key, 3);
#ifdef DEC_KS_UNROLL
ss[4] = word_in(key, 4);
cx->ks[v(56,(4))] = ff(ss[4]);
ss[4] = word_in(key, 5);
cx->ks[v(56,(5))] = ff(ss[5]);
ss[4] = word_in(key, 6);
cx->ks[v(56,(6))] = ff(ss[6]);
ss[4] = word_in(key, 7);
cx->ks[v(56,(7))] = ff(ss[7]);
kdf8(cx->ks, 0); kd8(cx->ks, 1);
kd8(cx->ks, 2); kd8(cx->ks, 3);
kd8(cx->ks, 4); kd8(cx->ks, 5);
kdl8(cx->ks, 6);
#else
cx->ks[v(56,(4))] = ss[4] = word_in(key, 4);
cx->ks[v(56,(5))] = ss[5] = word_in(key, 5);
cx->ks[v(56,(6))] = ss[6] = word_in(key, 6);
cx->ks[v(56,(7))] = ss[7] = word_in(key, 7);
{ uint_32t i;
for(i = 0; i < 6; ++i)
k8e(cx->ks, i);
k8ef(cx->ks, 6);
#if !(DEC_ROUND == NO_TABLES)
for(i = N_COLS; i < 14 * N_COLS; ++i)
cx->ks[i] = inv_mcol(cx->ks[i]);
#endif
}
#endif
cx->inf.l = 0;
cx->inf.b[0] = 14 * 16;
#ifdef USE_VIA_ACE_IF_PRESENT
if(VIA_ACE_AVAILABLE)
cx->inf.b[1] = 0xff;
#endif
return EXIT_SUCCESS;
}
static void
aes_decrypt_key256(const unsigned char *key, uint32_t rk[])
{
uint32_t ss[9];
#if defined(d_vars)
d_vars;
#endif
rk[v(56, (0))] = ss[0] = word_in(key, 0);
rk[v(56, (1))] = ss[1] = word_in(key, 1);
rk[v(56, (2))] = ss[2] = word_in(key, 2);
rk[v(56, (3))] = ss[3] = word_in(key, 3);
#ifdef DEC_KS_UNROLL
ss[4] = word_in(key, 4);
rk[v(56, (4))] = ff(ss[4]);
ss[5] = word_in(key, 5);
rk[v(56, (5))] = ff(ss[5]);
ss[6] = word_in(key, 6);
rk[v(56, (6))] = ff(ss[6]);
ss[7] = word_in(key, 7);
rk[v(56, (7))] = ff(ss[7]);
kdf8(rk, 0); kd8(rk, 1);
kd8(rk, 2); kd8(rk, 3);
kd8(rk, 4); kd8(rk, 5);
kdl8(rk, 6);
#else
rk[v(56, (4))] = ss[4] = word_in(key, 4);
rk[v(56, (5))] = ss[5] = word_in(key, 5);
rk[v(56, (6))] = ss[6] = word_in(key, 6);
rk[v(56, (7))] = ss[7] = word_in(key, 7);
{
uint32_t i;
for (i = 0; i < 6; ++i)
k8e(rk, i);
k8ef(rk, 6);
#if !(DEC_ROUND == NO_TABLES)
for (i = MAX_AES_NB; i < 14 * MAX_AES_NB; ++i)
rk[i] = inv_mcol(rk[i]);
#endif
}
#endif /* DEC_KS_UNROLL */
}