aes_rval ccaes_gladman_decrypt_key192(const unsigned char *key, ccaes_gladman_decrypt_ctx cx[1])
{ aes_32t ss[7];
#if defined( d_vars )
d_vars;
#endif
cx->ks[0] = ss[0] = word_in(key, 0);
cx->ks[1] = ss[1] = word_in(key, 1);
cx->ks[2] = ss[2] = word_in(key, 2);
cx->ks[3] = ss[3] = word_in(key, 3);
#if DEC_UNROLL == NONE
cx->ks[4] = ss[4] = word_in(key, 4);
cx->ks[5] = ss[5] = word_in(key, 5);
{ aes_32t i;
for(i = 0; i < (13 * N_COLS - 7) / 6; ++i)
ke6(cx->ks, i);
kel6(cx->ks, 7);
#if !(DEC_ROUND == NO_TABLES)
for(i = N_COLS; i < 12 * N_COLS; ++i)
cx->ks[i] = inv_mcol(cx->ks[i]);
#endif
}
#else
cx->ks[4] = ff(ss[4] = word_in(key, 4));
cx->ks[5] = ff(ss[5] = word_in(key, 5));
kdf6(cx->ks, 0); kd6(cx->ks, 1);
kd6(cx->ks, 2); kd6(cx->ks, 3);
kd6(cx->ks, 4); kd6(cx->ks, 5);
kd6(cx->ks, 6); kdl6(cx->ks, 7);
#endif
cx->rn = 12;
}
AES_RETURN aes_decrypt_key192(const unsigned char *key, aes_decrypt_ctx cx[1])
{ uint_32t ss[7];
#if defined( d_vars )
d_vars;
#endif
cx->ks[v(48,(0))] = ss[0] = word_in(key, 0);
cx->ks[v(48,(1))] = ss[1] = word_in(key, 1);
cx->ks[v(48,(2))] = ss[2] = word_in(key, 2);
cx->ks[v(48,(3))] = ss[3] = word_in(key, 3);
#if DEC_UNROLL == NONE
cx->ks[v(48,(4))] = ss[4] = word_in(key, 4);
cx->ks[v(48,(5))] = ss[5] = word_in(key, 5);
{ uint_32t i;
for(i = 0; i < 7; ++i)
k6e(cx->ks, i);
k6ef(cx->ks, 7);
#if !(DEC_ROUND == NO_TABLES)
for(i = N_COLS; i < 12 * N_COLS; ++i)
cx->ks[i] = inv_mcol(cx->ks[i]);
#endif
}
#else
cx->ks[v(48,(4))] = ff(ss[4] = word_in(key, 4));
cx->ks[v(48,(5))] = ff(ss[5] = word_in(key, 5));
kdf6(cx->ks, 0); kd6(cx->ks, 1);
kd6(cx->ks, 2); kd6(cx->ks, 3);
kd6(cx->ks, 4); kd6(cx->ks, 5);
kd6(cx->ks, 6); kdl6(cx->ks, 7);
#endif
cx->inf.l = 0;
cx->inf.b[0] = 12 * 16;
#ifdef USE_VIA_ACE_IF_PRESENT
if(VIA_ACE_AVAILABLE)
cx->inf.b[1] = 0xff;
#endif
#if defined( AES_ERR_CHK )
return EXIT_SUCCESS;
#endif
}
aes_rval aes_decrypt_key192(const unsigned char *key, aes_decrypt_ctx cx[1])
{ aes_32t ss[7];
#if defined( d_vars )
d_vars;
#endif
cx->ks[0] = ss[0] = word_in(key, 0);
cx->ks[1] = ss[1] = word_in(key, 1);
cx->ks[2] = ss[2] = word_in(key, 2);
cx->ks[3] = ss[3] = word_in(key, 3);
#if DEC_UNROLL == NONE
cx->ks[4] = ss[4] = word_in(key, 4);
cx->ks[5] = ss[5] = word_in(key, 5);
{ aes_32t i;
for(i = 0; i < (13 * N_COLS - 7) / 6; ++i)
ke6(cx->ks, i);
kel6(cx->ks, 7);
#if !(DEC_ROUND == NO_TABLES)
for(i = N_COLS; i < 12 * N_COLS; ++i)
cx->ks[i] = inv_mcol(cx->ks[i]);
#endif
}
#else
cx->ks[4] = ff(ss[4] = word_in(key, 4));
cx->ks[5] = ff(ss[5] = word_in(key, 5));
kdf6(cx->ks, 0); kd6(cx->ks, 1);
kd6(cx->ks, 2); kd6(cx->ks, 3);
kd6(cx->ks, 4); kd6(cx->ks, 5);
kd6(cx->ks, 6); kdl6(cx->ks, 7);
#endif
cx->rn = 12;
#if CC_AES_USE_HARDWARE
bcopy(key, cx->keyBytes, 24);
cx->keyLength = 24;
#endif
#if defined( AES_ERR_CHK )
return aes_good;
#endif
}
aes_rval aes_decrypt_key192(const void *in_key, aes_decrypt_ctx cx[1])
{ aes_32t ss[7];
#ifdef d_vars
d_vars;
#endif
cx->ks[0] = ss[0] = word_in(in_key, 0);
cx->ks[1] = ss[1] = word_in(in_key, 1);
cx->ks[2] = ss[2] = word_in(in_key, 2);
cx->ks[3] = ss[3] = word_in(in_key, 3);
#if DEC_UNROLL == NONE
cx->ks[4] = ss[4] = word_in(in_key, 4);
cx->ks[5] = ss[5] = word_in(in_key, 5);
{ aes_32t i;
for(i = 0; i < (13 * N_COLS - 1) / 6; ++i)
ke6(cx->ks, i);
#if !(DEC_ROUND == NO_TABLES)
for(i = N_COLS; i < 12 * N_COLS; ++i)
cx->ks[i] = inv_mcol(cx->ks[i]);
#endif
}
#else
cx->ks[4] = ff(ss[4] = word_in(in_key, 4));
cx->ks[5] = ff(ss[5] = word_in(in_key, 5));
kdf6(cx->ks, 0); kd6(cx->ks, 1);
kd6(cx->ks, 2); kd6(cx->ks, 3);
kd6(cx->ks, 4); kd6(cx->ks, 5);
kd6(cx->ks, 6); kdl6(cx->ks, 7);
#endif
/* cx->ks[45] ^ cx->ks[52] ^ cx->ks[53] is zero for a 256 bit */
/* key and must be non-zero for 128 and 192 bits keys */
cx->ks[53] = cx->ks[45];
cx->ks[52] = 12;
#ifdef AES_ERR_CHK
return aes_good;
#endif
}
static void
aes_decrypt_key192(const unsigned char *key, uint32_t rk[])
{
uint32_t ss[7];
#if defined(d_vars)
d_vars;
#endif
rk[v(48, (0))] = ss[0] = word_in(key, 0);
rk[v(48, (1))] = ss[1] = word_in(key, 1);
rk[v(48, (2))] = ss[2] = word_in(key, 2);
rk[v(48, (3))] = ss[3] = word_in(key, 3);
#ifdef DEC_KS_UNROLL
ss[4] = word_in(key, 4);
rk[v(48, (4))] = ff(ss[4]);
ss[5] = word_in(key, 5);
rk[v(48, (5))] = ff(ss[5]);
kdf6(rk, 0); kd6(rk, 1);
kd6(rk, 2); kd6(rk, 3);
kd6(rk, 4); kd6(rk, 5);
kd6(rk, 6); kdl6(rk, 7);
#else
rk[v(48, (4))] = ss[4] = word_in(key, 4);
rk[v(48, (5))] = ss[5] = word_in(key, 5);
{
uint32_t i;
for (i = 0; i < 7; ++i)
k6e(rk, i);
k6ef(rk, 7);
#if !(DEC_ROUND == NO_TABLES)
for (i = MAX_AES_NB; i < 12 * MAX_AES_NB; ++i)
rk[i] = inv_mcol(rk[i]);
#endif
}
#endif
}
aes_rval aes_set_decrypt_key(const unsigned char in_key[], unsigned int klen, aes_ctx cx[1])
{ aes_32t ss[8];
d_vars
#if !defined(FIXED_TABLES)
#ifdef GLOBALS
if(!t_use(in,it)) gen_tabs();
#else
if(!cx->t_ptr || !t_use(in,it)) gen_tabs(cx);
#endif
#endif
#if !defined(BLOCK_SIZE)
if(!cx->n_blk) cx->n_blk = 16;
#else
cx->n_blk = BLOCK_SIZE;
#endif
if(((klen & 7) || klen < 16 || klen > 32) && ((klen & 63) || klen < 128 || klen > 256))
{
cx->n_rnd = 0; return aes_bad;
}
klen >>= (klen < 128 ? 2 : 5);
cx->n_blk = (cx->n_blk & ~3) | 2;
cx->k_sch[0] = ss[0] = word_in(in_key );
cx->k_sch[1] = ss[1] = word_in(in_key + 4);
cx->k_sch[2] = ss[2] = word_in(in_key + 8);
cx->k_sch[3] = ss[3] = word_in(in_key + 12);
#if (BLOCK_SIZE == 16) && (DEC_UNROLL != NONE)
switch(klen)
{
case 4:
kdf4(cx->k_sch, 0); kd4(cx->k_sch, 1);
kd4(cx->k_sch, 2); kd4(cx->k_sch, 3);
kd4(cx->k_sch, 4); kd4(cx->k_sch, 5);
kd4(cx->k_sch, 6); kd4(cx->k_sch, 7);
kd4(cx->k_sch, 8); kdl4(cx->k_sch, 9);
cx->n_rnd = 10; break;
case 6:
cx->k_sch[4] = ff(ss[4] = word_in(in_key + 16));
cx->k_sch[5] = ff(ss[5] = word_in(in_key + 20));
kdf6(cx->k_sch, 0); kd6(cx->k_sch, 1);
kd6(cx->k_sch, 2); kd6(cx->k_sch, 3);
kd6(cx->k_sch, 4); kd6(cx->k_sch, 5);
kd6(cx->k_sch, 6); kdl6(cx->k_sch, 7);
cx->n_rnd = 12; break;
case 8:
cx->k_sch[4] = ff(ss[4] = word_in(in_key + 16));
cx->k_sch[5] = ff(ss[5] = word_in(in_key + 20));
cx->k_sch[6] = ff(ss[6] = word_in(in_key + 24));
cx->k_sch[7] = ff(ss[7] = word_in(in_key + 28));
kdf8(cx->k_sch, 0); kd8(cx->k_sch, 1);
kd8(cx->k_sch, 2); kd8(cx->k_sch, 3);
kd8(cx->k_sch, 4); kd8(cx->k_sch, 5);
kdl8(cx->k_sch, 6);
cx->n_rnd = 14; break;
default:
;
}
#else
cx->n_rnd = (klen > nc ? klen : nc) + 6;
{ aes_32t i, l;
l = (nc * cx->n_rnd + nc - 1) / klen;
switch(klen)
{
case 4:
for(i = 0; i < l; ++i)
ke4(cx->k_sch, i);
break;
case 6:
cx->k_sch[4] = ss[4] = word_in(in_key + 16);
cx->k_sch[5] = ss[5] = word_in(in_key + 20);
for(i = 0; i < l; ++i)
ke6(cx->k_sch, i);
break;
case 8:
cx->k_sch[4] = ss[4] = word_in(in_key + 16);
cx->k_sch[5] = ss[5] = word_in(in_key + 20);
cx->k_sch[6] = ss[6] = word_in(in_key + 24);
cx->k_sch[7] = ss[7] = word_in(in_key + 28);
for(i = 0; i < l; ++i)
ke8(cx->k_sch, i);
break;
default:
;
}
#if (DEC_ROUND != NO_TABLES)
for(i = nc; i < nc * cx->n_rnd; ++i)
cx->k_sch[i] = inv_mcol(cx->k_sch[i]);
#endif
}
#endif
return aes_good;
}
