ppsspp/ext/libkirk/amctrl.c
2013-04-26 12:05:21 +08:00

714 lines
13 KiB
C

/*
* amctrl.c -- Reverse engineering of amctrl.prx
* written by tpu.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "kirk_engine.h"
#include "AES.h"
#include "SHA1.h"
#include "amctrl.h"
/*************************************************************/
static const u8 loc_1CD4[16] = {0xE3, 0x50, 0xED, 0x1D, 0x91, 0x0A, 0x1F, 0xD0, 0x29, 0xBB, 0x1C, 0x3E, 0xF3, 0x40, 0x77, 0xFB};
static const u8 loc_1CE4[16] = {0x13, 0x5F, 0xA4, 0x7C, 0xAB, 0x39, 0x5B, 0xA4, 0x76, 0xB8, 0xCC, 0xA9, 0x8F, 0x3A, 0x04, 0x45};
static const u8 loc_1CF4[16] = {0x67, 0x8D, 0x7F, 0xA3, 0x2A, 0x9C, 0xA0, 0xD1, 0x50, 0x8A, 0xD8, 0x38, 0x5E, 0x4B, 0x01, 0x7E};
static u8 kirk_buf[0x0814]; // 1DC0 1DD4
/*************************************************************/
static int kirk4(u8 *buf, int size, int type)
{
int retv;
u32 *header = (u32*)buf;
header[0] = 4;
header[1] = 0;
header[2] = 0;
header[3] = type;
header[4] = size;
retv = sceUtilsBufferCopyWithRange(buf, size+0x14, buf, size, 4);
if(retv)
return 0x80510311;
return 0;
}
static int kirk7(u8 *buf, int size, int type)
{
int retv;
u32 *header = (u32*)buf;
header[0] = 5;
header[1] = 0;
header[2] = 0;
header[3] = type;
header[4] = size;
retv = sceUtilsBufferCopyWithRange(buf, size+0x14, buf, size, 7);
if(retv)
return 0x80510311;
return 0;
}
static int kirk5(u8 *buf, int size)
{
int retv;
u32 *header = (u32*)buf;
header[0] = 4;
header[1] = 0;
header[2] = 0;
header[3] = 0x0100;
header[4] = size;
retv = sceUtilsBufferCopyWithRange(buf, size+0x14, buf, size, 5);
if(retv)
return 0x80510312;
return 0;
}
static int kirk8(u8 *buf, int size)
{
int retv;
u32 *header = (u32*)buf;
header[0] = 5;
header[1] = 0;
header[2] = 0;
header[3] = 0x0100;
header[4] = size;
retv = sceUtilsBufferCopyWithRange(buf, size+0x14, buf, size, 8);
if(retv)
return 0x80510312;
return 0;
}
static int kirk14(u8 *buf)
{
int retv;
retv = sceUtilsBufferCopyWithRange(buf, 0x14, 0, 0, 14);
if(retv)
return 0x80510315;
return 0;
}
/*************************************************************/
// 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;
}
// type:
// 2: use fuse id
// 3: use fixed id
int sceDrmBBMacInit(MAC_KEY *mkey, int type)
{
mkey->type = type;
mkey->pad_size = 0;
memset(mkey->key, 0, 16);
memset(mkey->pad, 0, 16);
return 0;
}
int sceDrmBBMacUpdate(MAC_KEY *mkey, u8 *buf, int size)
{
int retv = 0, ksize, p, type;
u8 *kbuf;
if(mkey->pad_size>16){
retv = 0x80510302;
goto _exit;
}
if(mkey->pad_size+size<=16){
memcpy(mkey->pad+mkey->pad_size, buf, size);
mkey->pad_size += size;
retv = 0;
}else{
kbuf = kirk_buf+0x14;
// copy pad data first
memcpy(kbuf, mkey->pad, mkey->pad_size);
p = mkey->pad_size;
mkey->pad_size += size;
mkey->pad_size &= 0x0f;
if(mkey->pad_size==0)
mkey->pad_size = 16;
size -= mkey->pad_size;
// save last data to pad buf
memcpy(mkey->pad, buf+size, mkey->pad_size);
type = (mkey->type==2)? 0x3A : 0x38;
while(size){
ksize = (size+p>=0x0800)? 0x0800 : size+p;
memcpy(kbuf+p, buf, ksize-p);
retv = sub_158(kirk_buf, ksize, mkey->key, type);
if(retv)
goto _exit;
size -= (ksize-p);
buf += ksize-p;
p = 0;
}
}
_exit:
return retv;
}
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);
// left shift tmp 1 bit
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;
// padding remain data
if(mkey->pad_size<16){
// left shift tmp 1 bit
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);
}
for(i=0; i<16; i++){
mkey->pad[i] ^= tmp[i];
}
memcpy(kbuf, mkey->pad, 16);
memcpy(tmp1, mkey->key, 16);
retv = sub_158(kirk_buf, 0x10, tmp1, code);
if(retv)
return retv;
for(i=0; i<0x10; i++){
tmp1[i] ^= loc_1CD4[i];
}
if(mkey->type==2){
memcpy(kbuf, tmp1, 16);
retv = kirk5(kirk_buf, 0x10);
if(retv)
goto _exit;
retv = kirk4(kirk_buf, 0x10, code);
if(retv)
goto _exit;
memcpy(tmp1, kbuf, 16);
}
if(vkey){
for(i=0; i<0x10; i++){
tmp1[i] ^= vkey[i];
}
memcpy(kbuf, tmp1, 16);
retv = kirk4(kirk_buf, 0x10, code);
if(retv)
goto _exit;
memcpy(tmp1, kbuf, 16);
}
memcpy(buf, tmp1, 16);
memset(mkey->key, 0, 16);
memset(mkey->pad, 0, 16);
mkey->pad_size = 0;
mkey->type = 0;
retv = 0;
_exit:
return retv;
}
int sceDrmBBMacFinal2(MAC_KEY *mkey, u8 *out, u8 *vkey)
{
int i, retv, type;
u8 *kbuf, tmp[16];
type = mkey->type;
retv = sceDrmBBMacFinal(mkey, tmp, vkey);
if(retv)
return retv;
kbuf = kirk_buf+0x14;
// decrypt bbmac
if(type==3){
memcpy(kbuf, out, 0x10);
kirk7(kirk_buf, 0x10, 0x63);
}else{
memcpy(kirk_buf, out, 0x10);
}
retv = 0;
for(i=0; i<0x10; i++){
if(kirk_buf[i]!=tmp[i]){
retv = 0x80510300;
break;
}
}
return retv;
}
// get key from bbmac
int bbmac_getkey(MAC_KEY *mkey, u8 *bbmac, u8 *vkey)
{
int i, retv, type, code;
u8 *kbuf, tmp[16], tmp1[16];
type = mkey->type;
retv = sceDrmBBMacFinal(mkey, tmp, NULL);
if(retv)
return retv;
kbuf = kirk_buf+0x14;
// decrypt bbmac
if(type==3){
memcpy(kbuf, bbmac, 0x10);
kirk7(kirk_buf, 0x10, 0x63);
}else{
memcpy(kirk_buf, bbmac, 0x10);
}
memcpy(tmp1, kirk_buf, 16);
memcpy(kbuf, tmp1, 16);
code = (type==2)? 0x3A : 0x38;
kirk7(kirk_buf, 0x10, code);
for(i=0; i<0x10; i++){
vkey[i] = tmp[i] ^ kirk_buf[i];
}
return 0;
}
/*************************************************************/
static int sub_1F8(u8 *buf, int size, u8 *key, int key_type)
{
int i, retv;
u8 tmp[16];
// copy last 16 bytes to tmp
memcpy(tmp, buf+size+0x14-16, 16);
retv = kirk7(buf, size, key_type);
if(retv)
return retv;
for(i=0; i<16; i++){
buf[i] ^= key[i];
}
// copy last 16 bytes to keys
memcpy(key, tmp, 16);
return 0;
}
static int sub_428(u8 *kbuf, u8 *dbuf, int size, CIPHER_KEY *ckey)
{
int i, retv;
u8 tmp1[16], tmp2[16];
memcpy(kbuf+0x14, ckey->key, 16);
for(i=0; i<16; i++){
kbuf[0x14+i] ^= loc_1CF4[i];
}
if(ckey->type==2)
retv = kirk8(kbuf, 16);
else
retv = kirk7(kbuf, 16, 0x39);
if(retv)
return retv;
for(i=0; i<16; i++){
kbuf[i] ^= loc_1CE4[i];
}
memcpy(tmp2, kbuf, 0x10);
if(ckey->seed==1){
memset(tmp1, 0, 0x10);
}else{
memcpy(tmp1, tmp2, 0x10);
*(u32*)(tmp1+0x0c) = ckey->seed-1;
}
for(i=0; i<size; i+=16){
memcpy(kbuf+0x14+i, tmp2, 12);
*(u32*)(kbuf+0x14+i+12) = ckey->seed;
ckey->seed += 1;
}
retv = sub_1F8(kbuf, size, tmp1, 0x63);
if(retv)
return retv;
for(i=0; i<size; i++){
dbuf[i] ^= kbuf[i];
}
return 0;
}
// type: 1 use fixed key
// 2 use fuse id
// mode: 1 for encrypt
// 2 for decrypt
int sceDrmBBCipherInit(CIPHER_KEY *ckey, int type, int mode, u8 *header_key, u8 *version_key, u32 seed)
{
int i, retv;
u8 *kbuf;
kbuf = kirk_buf+0x14;
ckey->type = type;
if(mode==2){
ckey->seed = seed+1;
for(i=0; i<16; i++){
ckey->key[i] = header_key[i];
}
if(version_key){
for(i=0; i<16; i++){
ckey->key[i] ^= version_key[i];
}
}
retv = 0;
}else if(mode==1){
ckey->seed = 1;
retv = kirk14(kirk_buf);
if(retv)
return retv;
memcpy(kbuf, kirk_buf, 0x10);
memset(kbuf+0x0c, 0, 4);
if(ckey->type==2){
for(i=0; i<16; i++){
kbuf[i] ^= loc_1CE4[i];
}
retv = kirk5(kirk_buf, 0x10);
for(i=0; i<16; i++){
kbuf[i] ^= loc_1CF4[i];
}
}else{
for(i=0; i<16; i++){
kbuf[i] ^= loc_1CE4[i];
}
retv = kirk4(kirk_buf, 0x10, 0x39);
for(i=0; i<16; i++){
kbuf[i] ^= loc_1CF4[i];
}
}
if(retv)
return retv;
memcpy(ckey->key, kbuf, 0x10);
memcpy(header_key, kbuf, 0x10);
if(version_key){
for(i=0; i<16; i++){
ckey->key[i] ^= version_key[i];
}
}
}else{
retv = 0;
}
return retv;
}
int sceDrmBBCipherUpdate(CIPHER_KEY *ckey, u8 *data, int size)
{
int p, retv, dsize;
retv = 0;
p = 0;
while(size>0){
dsize = (size>=0x0800)? 0x0800 : size;
retv = sub_428(kirk_buf, data+p, dsize, ckey);
if(retv)
break;
size -= dsize;
p += dsize;
}
return retv;
}
int sceDrmBBCipherFinal(CIPHER_KEY *ckey)
{
memset(ckey->key, 0, 16);
ckey->type = 0;
ckey->seed = 0;
return 0;
}
/*************************************************************/
// AES128 encrypt key
static const u8 key_357C[0x30] = {
0x07,0x3D,0x9E,0x9D,0xA8,0xFD,0x3B,0x2F,0x63,0x18,0x93,0x2E,0xF8,0x57,0xA6,0x64,
0x37,0x49,0xB7,0x01,0xCA,0xE2,0xE0,0xC5,0x44,0x2E,0x06,0xB6,0x1E,0xFF,0x84,0xF2,
0x9D,0x31,0xB8,0x5A,0xC8,0xFA,0x16,0x80,0x73,0x60,0x18,0x82,0x18,0x77,0x91,0x9D,
};
static const u8 key_363C[16] = {
0x38,0x20,0xD0,0x11,0x07,0xA3,0xFF,0x3E,0x0A,0x4C,0x20,0x85,0x39,0x10,0xB5,0x54,
};
int sceNpDrmGetFixedKey(u8 *key, char *npstr, int type)
{
AES_ctx akey;
MAC_KEY mkey;
char strbuf[0x30];
int retv;
if((type&0x01000000)==0)
return 0x80550901;
type &= 0x000000ff;
memset(strbuf, 0, 0x30);
strncpy(strbuf, npstr, 0x30);
retv = sceDrmBBMacInit(&mkey, 1);
if(retv)
return retv;
retv = sceDrmBBMacUpdate(&mkey, (u8*)strbuf, 0x30);
if(retv)
return retv;
retv = sceDrmBBMacFinal(&mkey, key, (u8*)key_363C);
if(retv)
return 0x80550902;
if(type==0)
return 0;
if(type>3)
return 0x80550901;
type = (type-1)*16;
AES_set_key(&akey, &key_357C[type], 128);
AES_encrypt(&akey, key, key);
return 0;
}
/*************************************************************/
static const u8 dnas_key1A90[] = {0xED,0xE2,0x5D,0x2D,0xBB,0xF8,0x12,0xE5,0x3C,0x5C,0x59,0x32,0xFA,0xE3,0xE2,0x43};
static const u8 dnas_key1AA0[] = {0x27,0x74,0xFB,0xEB,0xA4,0xA0, 1,0xD7, 2,0x56,0x9E,0x33,0x8C,0x19,0x57,0x83};
PGD_DESC *pgd_open(u8 *pgd_buf, int pgd_flag, u8 *pgd_vkey)
{
PGD_DESC *pgd;
MAC_KEY mkey;
CIPHER_KEY ckey;
u8 *fkey;
int retv;
//DEBUG_LOG(HLE, "Open PGD ...");
pgd = (PGD_DESC*)malloc(sizeof(PGD_DESC));
memset(pgd, 0, sizeof(PGD_DESC));
pgd->key_index = *(u32*)(pgd_buf+4);
pgd->drm_type = *(u32*)(pgd_buf+8);
if(pgd->drm_type==1){
pgd->mac_type = 1;
pgd_flag |= 4;
if(pgd->key_index>1){
pgd->mac_type = 3;
pgd_flag |= 8;
}
pgd->cipher_type = 1;
}else{
pgd->mac_type = 2;
pgd->cipher_type = 2;
}
pgd->open_flag = pgd_flag;
// select fixed key
fkey = NULL;
if(pgd_flag&2)
fkey = (u8*)dnas_key1A90;
if(pgd_flag&1)
fkey = (u8*)dnas_key1AA0;
if(fkey==NULL){
//ERROR_LOG(HLE, "pgd_open: invalid pgd_flag! %08x\n", pgd_flag);
free(pgd);
return NULL;
}
// MAC_0x80 check
sceDrmBBMacInit(&mkey, pgd->mac_type);
sceDrmBBMacUpdate(&mkey, pgd_buf+0x00, 0x80);
retv = sceDrmBBMacFinal2(&mkey, pgd_buf+0x80, fkey);
if(retv){
//ERROR_LOG(HLE, "pgd_open: MAC_80 check failed!: %08x(%d)\n", retv, retv);
free(pgd);
return NULL;
}
// MAC_0x70
sceDrmBBMacInit(&mkey, pgd->mac_type);
sceDrmBBMacUpdate(&mkey, pgd_buf+0x00, 0x70);
if(pgd_vkey){
// use given vkey
retv = sceDrmBBMacFinal2(&mkey, pgd_buf+0x70, pgd_vkey);
if(retv){
//ERROR_LOG(HLE, "pgd_open: MAC_70 check failed!: %08x(%d)\n", retv, retv);
free(pgd);
return NULL;
}else{
memcpy(pgd->vkey, pgd_vkey, 16);
}
}else{
// get vkey from MAC_70
bbmac_getkey(&mkey, pgd_buf+0x70, pgd->vkey);
}
// decrypt PGD_DESC
sceDrmBBCipherInit(&ckey, pgd->cipher_type, 2, pgd_buf+0x10, pgd->vkey, 0);
sceDrmBBCipherUpdate(&ckey, pgd_buf+0x30, 0x30);
sceDrmBBCipherFinal(&ckey);
pgd->data_size = *(u32*)(pgd_buf+0x44);
pgd->block_size = *(u32*)(pgd_buf+0x48);
pgd->data_offset = *(u32*)(pgd_buf+0x4c);
memcpy(pgd->dkey, pgd_buf+0x30, 16);
pgd->align_size = (pgd->data_size+15)&~15;
pgd->table_offset = pgd->data_offset+pgd->align_size;
pgd->block_nr = (pgd->align_size+pgd->block_size-1)&~(pgd->block_size-1);
pgd->block_nr = pgd->block_nr/pgd->block_size;
pgd->file_offset = 0;
pgd->current_block = -1;
pgd->block_buf = (u8*)malloc(pgd->block_size*2);
return pgd;
}
int pgd_decrypt_block(PGD_DESC *pgd, int block)
{
CIPHER_KEY ckey;
u32 block_offset;
block_offset = block*pgd->block_size;
// decrypt block data
sceDrmBBCipherInit(&ckey, pgd->cipher_type, 2, pgd->dkey, pgd->vkey, block_offset>>4);
sceDrmBBCipherUpdate(&ckey, pgd->block_buf, pgd->block_size);
sceDrmBBCipherFinal(&ckey);
return pgd->block_size;
}
int pgd_close(PGD_DESC *pgd)
{
if(pgd){
free(pgd->block_buf);
free(pgd);
}
return 0;
}
/*************************************************************/