int sceDrmBBMacFinal(MAC_KEY *mkey, u8 *buf, u8 *vkey)
{
int i, retv, code;
u8 *kbuf, tmp[16], tmp1[16];
u32 t0, v0, v1;
if (mkey->pad_size > 16)
return 0x80510302;
code = (mkey->type == 2) ? 0x3A : 0x38;
kbuf = kirk_buf + 0x14;
memset(kbuf, 0, 16);
retv = kirk4(kirk_buf, 16, code);
if (retv)
goto _exit;
memcpy(tmp, kbuf, 16);
t0 = (tmp[0] & 0x80) ? 0x87 : 0;
for (i = 0; i < 15; i++)
{
v1 = tmp[i + 0];
v0 = tmp[i + 1];
v1 <<= 1;
v0 >>= 7;
v0 |= v1;
tmp[i + 0] = v0;
}
v0 = tmp[15];
v0 <<= 1;
v0 ^= t0;
tmp[15] = v0;
if (mkey->pad_size < 16)
{
t0 = (tmp[0] & 0x80) ? 0x87 : 0;
for (i = 0; i < 15; i++)
{
v1 = tmp[i + 0];
v0 = tmp[i + 1];
v1 <<= 1;
v0 >>= 7;
v0 |= v1;
tmp[i + 0] = v0;
}
v0 = tmp[15];
v0 <<= 1;
v0 ^= t0;
tmp[15] = v0;
mkey->pad[mkey->pad_size] = 0x80;
if (mkey->pad_size + 1 < 16)
memset(mkey->pad + mkey->pad_size + 1, 0, 16 - mkey->pad_size - 1);
}
// Called by sceDrmBBMacUpdate
// encrypt_buf
static int sub_158(u8 *buf, int size, u8 *key, int key_type)
{
int i, retv;
for(i=0; i<16; i++){
buf[0x14+i] ^= key[i];
}
retv = kirk4(buf, size, key_type);
if(retv)
return retv;
// copy last 16 bytes to keys
memcpy(key, buf+size+4, 16);
return 0;
}
/*
Internal functions.
*/
static int encrypt_buf(u8 *buf, int size, u8 *key, int key_type)
{
int i, retv;
for (i = 0; i < 16; i++) {
buf[0x14+i] ^= key[i];
}
retv = kirk4(buf, size, key_type);
if (retv)
return retv;
memcpy(key, buf + size + 4, 16);
return 0;
}
