mirror of
https://github.com/libretro/ppsspp.git
synced 2024-11-24 16:49:50 +00:00
720 lines
13 KiB
C
720 lines
13 KiB
C
/*
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* amctrl.c -- Reverse engineering of amctrl.prx
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* written by tpu.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "kirk_engine.h"
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#include "AES.h"
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#include "SHA1.h"
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#include "amctrl.h"
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//Turn off optimization in VS2013
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#ifdef _MSC_VER
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#if (_MSC_VER == 1800)
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#pragma optimize( "", off )
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#endif
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#endif
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/*************************************************************/
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static const u8 loc_1CD4[16] = {0xE3, 0x50, 0xED, 0x1D, 0x91, 0x0A, 0x1F, 0xD0, 0x29, 0xBB, 0x1C, 0x3E, 0xF3, 0x40, 0x77, 0xFB};
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static const u8 loc_1CE4[16] = {0x13, 0x5F, 0xA4, 0x7C, 0xAB, 0x39, 0x5B, 0xA4, 0x76, 0xB8, 0xCC, 0xA9, 0x8F, 0x3A, 0x04, 0x45};
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static const u8 loc_1CF4[16] = {0x67, 0x8D, 0x7F, 0xA3, 0x2A, 0x9C, 0xA0, 0xD1, 0x50, 0x8A, 0xD8, 0x38, 0x5E, 0x4B, 0x01, 0x7E};
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static u8 kirk_buf[0x0814]; // 1DC0 1DD4
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/*************************************************************/
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static int kirk4(u8 *buf, int size, int type)
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{
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int retv;
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u32 *header = (u32*)buf;
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header[0] = 4;
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header[1] = 0;
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header[2] = 0;
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header[3] = type;
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header[4] = size;
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retv = sceUtilsBufferCopyWithRange(buf, size+0x14, buf, size, 4);
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if(retv)
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return 0x80510311;
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return 0;
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}
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static int kirk7(u8 *buf, int size, int type)
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{
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int retv;
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u32 *header = (u32*)buf;
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header[0] = 5;
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header[1] = 0;
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header[2] = 0;
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header[3] = type;
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header[4] = size;
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retv = sceUtilsBufferCopyWithRange(buf, size+0x14, buf, size, 7);
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if(retv)
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return 0x80510311;
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return 0;
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}
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static int kirk5(u8 *buf, int size)
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{
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int retv;
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u32 *header = (u32*)buf;
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header[0] = 4;
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header[1] = 0;
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header[2] = 0;
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header[3] = 0x0100;
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header[4] = size;
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retv = sceUtilsBufferCopyWithRange(buf, size+0x14, buf, size, 5);
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if(retv)
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return 0x80510312;
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return 0;
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}
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static int kirk8(u8 *buf, int size)
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{
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int retv;
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u32 *header = (u32*)buf;
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header[0] = 5;
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header[1] = 0;
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header[2] = 0;
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header[3] = 0x0100;
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header[4] = size;
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retv = sceUtilsBufferCopyWithRange(buf, size+0x14, buf, size, 8);
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if(retv)
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return 0x80510312;
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return 0;
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}
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static int kirk14(u8 *buf)
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{
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int retv;
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retv = sceUtilsBufferCopyWithRange(buf, 0x14, 0, 0, 14);
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if(retv)
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return 0x80510315;
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return 0;
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}
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/*************************************************************/
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// Called by sceDrmBBMacUpdate
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// encrypt_buf
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static int sub_158(u8 *buf, int size, u8 *key, int key_type)
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{
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int i, retv;
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for(i=0; i<16; i++){
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buf[0x14+i] ^= key[i];
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}
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retv = kirk4(buf, size, key_type);
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if(retv)
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return retv;
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// copy last 16 bytes to keys
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memcpy(key, buf+size+4, 16);
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return 0;
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}
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// type:
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// 2: use fuse id
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// 3: use fixed id
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int sceDrmBBMacInit(MAC_KEY *mkey, int type)
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{
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mkey->type = type;
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mkey->pad_size = 0;
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memset(mkey->key, 0, 16);
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memset(mkey->pad, 0, 16);
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return 0;
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}
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int sceDrmBBMacUpdate(MAC_KEY *mkey, u8 *buf, int size)
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{
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int retv = 0, ksize, p, type;
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u8 *kbuf;
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if(mkey->pad_size>16){
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retv = 0x80510302;
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goto _exit;
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}
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if(mkey->pad_size+size<=16){
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memcpy(mkey->pad+mkey->pad_size, buf, size);
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mkey->pad_size += size;
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retv = 0;
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}else{
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kbuf = kirk_buf+0x14;
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// copy pad data first
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memcpy(kbuf, mkey->pad, mkey->pad_size);
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p = mkey->pad_size;
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mkey->pad_size += size;
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mkey->pad_size &= 0x0f;
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if(mkey->pad_size==0)
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mkey->pad_size = 16;
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size -= mkey->pad_size;
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// save last data to pad buf
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memcpy(mkey->pad, buf+size, mkey->pad_size);
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type = (mkey->type==2)? 0x3A : 0x38;
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while(size){
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ksize = (size+p>=0x0800)? 0x0800 : size+p;
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memcpy(kbuf+p, buf, ksize-p);
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retv = sub_158(kirk_buf, ksize, mkey->key, type);
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if(retv)
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goto _exit;
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size -= (ksize-p);
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buf += ksize-p;
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p = 0;
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}
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}
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_exit:
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return retv;
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}
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int sceDrmBBMacFinal(MAC_KEY *mkey, u8 *buf, u8 *vkey)
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{
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int i, retv, code;
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u8 *kbuf, tmp[16], tmp1[16];
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u32 t0, v0, v1;
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if(mkey->pad_size>16)
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return 0x80510302;
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code = (mkey->type==2)? 0x3A : 0x38;
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kbuf = kirk_buf+0x14;
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memset(kbuf, 0, 16);
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retv = kirk4(kirk_buf, 16, code);
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if(retv)
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goto _exit;
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memcpy(tmp, kbuf, 16);
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// left shift tmp 1 bit
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t0 = (tmp[0]&0x80)? 0x87 : 0;
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for(i=0; i<15; i++){
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v1 = tmp[i+0];
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v0 = tmp[i+1];
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v1 <<= 1;
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v0 >>= 7;
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v0 |= v1;
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tmp[i+0] = v0;
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}
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v0 = tmp[15];
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v0 <<= 1;
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v0 ^= t0;
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tmp[15] = v0;
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// padding remain data
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if(mkey->pad_size<16){
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// left shift tmp 1 bit
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t0 = (tmp[0]&0x80)? 0x87 : 0;
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for(i=0; i<15; i++){
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v1 = tmp[i+0];
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v0 = tmp[i+1];
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v1 <<= 1;
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v0 >>= 7;
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v0 |= v1;
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tmp[i+0] = v0;
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}
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v0 = tmp[15];
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v0 <<= 1;
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v0 ^= t0;
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tmp[15] = v0;
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mkey->pad[mkey->pad_size] = 0x80;
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if(mkey->pad_size+1<16)
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memset(mkey->pad+mkey->pad_size+1, 0, 16-mkey->pad_size-1);
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}
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for(i=0; i<16; i++){
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mkey->pad[i] ^= tmp[i];
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}
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memcpy(kbuf, mkey->pad, 16);
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memcpy(tmp1, mkey->key, 16);
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retv = sub_158(kirk_buf, 0x10, tmp1, code);
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if(retv)
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return retv;
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for(i=0; i<0x10; i++){
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tmp1[i] ^= loc_1CD4[i];
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}
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if(mkey->type==2){
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memcpy(kbuf, tmp1, 16);
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retv = kirk5(kirk_buf, 0x10);
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if(retv)
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goto _exit;
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retv = kirk4(kirk_buf, 0x10, code);
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if(retv)
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goto _exit;
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memcpy(tmp1, kbuf, 16);
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}
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if(vkey){
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for(i=0; i<0x10; i++){
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tmp1[i] ^= vkey[i];
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}
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memcpy(kbuf, tmp1, 16);
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retv = kirk4(kirk_buf, 0x10, code);
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if(retv)
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goto _exit;
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memcpy(tmp1, kbuf, 16);
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}
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memcpy(buf, tmp1, 16);
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memset(mkey->key, 0, 16);
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memset(mkey->pad, 0, 16);
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mkey->pad_size = 0;
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mkey->type = 0;
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retv = 0;
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_exit:
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return retv;
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}
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int sceDrmBBMacFinal2(MAC_KEY *mkey, u8 *out, u8 *vkey)
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{
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int i, retv, type;
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u8 *kbuf, tmp[16];
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type = mkey->type;
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retv = sceDrmBBMacFinal(mkey, tmp, vkey);
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if(retv)
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return retv;
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kbuf = kirk_buf+0x14;
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// decrypt bbmac
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if(type==3){
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memcpy(kbuf, out, 0x10);
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kirk7(kirk_buf, 0x10, 0x63);
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}else{
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memcpy(kirk_buf, out, 0x10);
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}
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retv = 0;
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for(i=0; i<0x10; i++){
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if(kirk_buf[i]!=tmp[i]){
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retv = 0x80510300;
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break;
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}
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}
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return retv;
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}
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// get key from bbmac
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int bbmac_getkey(MAC_KEY *mkey, u8 *bbmac, u8 *vkey)
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{
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int i, retv, type, code;
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u8 *kbuf, tmp[16], tmp1[16];
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type = mkey->type;
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retv = sceDrmBBMacFinal(mkey, tmp, NULL);
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if(retv)
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return retv;
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kbuf = kirk_buf+0x14;
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// decrypt bbmac
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if(type==3){
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memcpy(kbuf, bbmac, 0x10);
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kirk7(kirk_buf, 0x10, 0x63);
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}else{
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memcpy(kirk_buf, bbmac, 0x10);
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}
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memcpy(tmp1, kirk_buf, 16);
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memcpy(kbuf, tmp1, 16);
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code = (type==2)? 0x3A : 0x38;
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kirk7(kirk_buf, 0x10, code);
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for(i=0; i<0x10; i++){
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vkey[i] = tmp[i] ^ kirk_buf[i];
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}
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return 0;
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}
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/*************************************************************/
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static int sub_1F8(u8 *buf, int size, u8 *key, int key_type)
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{
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int i, retv;
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u8 tmp[16];
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// copy last 16 bytes to tmp
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memcpy(tmp, buf+size+0x14-16, 16);
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retv = kirk7(buf, size, key_type);
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if(retv)
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return retv;
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for(i=0; i<16; i++){
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buf[i] ^= key[i];
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}
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// copy last 16 bytes to keys
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memcpy(key, tmp, 16);
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return 0;
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}
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static int sub_428(u8 *kbuf, u8 *dbuf, int size, CIPHER_KEY *ckey)
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{
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int i, retv;
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u8 tmp1[16], tmp2[16];
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memcpy(kbuf+0x14, ckey->key, 16);
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for(i=0; i<16; i++){
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kbuf[0x14+i] ^= loc_1CF4[i];
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}
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if(ckey->type==2)
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retv = kirk8(kbuf, 16);
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else
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retv = kirk7(kbuf, 16, 0x39);
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if(retv)
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return retv;
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for(i=0; i<16; i++){
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kbuf[i] ^= loc_1CE4[i];
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}
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memcpy(tmp2, kbuf, 0x10);
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if(ckey->seed==1){
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memset(tmp1, 0, 0x10);
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}else{
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memcpy(tmp1, tmp2, 0x10);
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*(u32*)(tmp1+0x0c) = ckey->seed-1;
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}
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for(i=0; i<size; i+=16){
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memcpy(kbuf+0x14+i, tmp2, 12);
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*(u32*)(kbuf+0x14+i+12) = ckey->seed;
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ckey->seed += 1;
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}
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retv = sub_1F8(kbuf, size, tmp1, 0x63);
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if(retv)
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return retv;
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for(i=0; i<size; i++){
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dbuf[i] ^= kbuf[i];
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}
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return 0;
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}
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// type: 1 use fixed key
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// 2 use fuse id
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// mode: 1 for encrypt
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// 2 for decrypt
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int sceDrmBBCipherInit(CIPHER_KEY *ckey, int type, int mode, u8 *header_key, u8 *version_key, u32 seed)
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{
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int i, retv;
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u8 *kbuf;
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kbuf = kirk_buf+0x14;
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ckey->type = type;
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if(mode==2){
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ckey->seed = seed+1;
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for(i=0; i<16; i++){
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ckey->key[i] = header_key[i];
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}
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if(version_key){
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for(i=0; i<16; i++){
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ckey->key[i] ^= version_key[i];
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}
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}
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retv = 0;
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}else if(mode==1){
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ckey->seed = 1;
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retv = kirk14(kirk_buf);
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if(retv)
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return retv;
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memcpy(kbuf, kirk_buf, 0x10);
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memset(kbuf+0x0c, 0, 4);
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if(ckey->type==2){
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for(i=0; i<16; i++){
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kbuf[i] ^= loc_1CE4[i];
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}
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retv = kirk5(kirk_buf, 0x10);
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for(i=0; i<16; i++){
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kbuf[i] ^= loc_1CF4[i];
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}
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}else{
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for(i=0; i<16; i++){
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kbuf[i] ^= loc_1CE4[i];
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}
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retv = kirk4(kirk_buf, 0x10, 0x39);
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for(i=0; i<16; i++){
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kbuf[i] ^= loc_1CF4[i];
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}
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}
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if(retv)
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return retv;
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memcpy(ckey->key, kbuf, 0x10);
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memcpy(header_key, kbuf, 0x10);
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if(version_key){
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for(i=0; i<16; i++){
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ckey->key[i] ^= version_key[i];
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}
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}
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}else{
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retv = 0;
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}
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return retv;
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}
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int sceDrmBBCipherUpdate(CIPHER_KEY *ckey, u8 *data, int size)
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{
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int p, retv, dsize;
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retv = 0;
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p = 0;
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while(size>0){
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dsize = (size>=0x0800)? 0x0800 : size;
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retv = sub_428(kirk_buf, data+p, dsize, ckey);
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if(retv)
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break;
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size -= dsize;
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p += dsize;
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}
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return retv;
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}
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int sceDrmBBCipherFinal(CIPHER_KEY *ckey)
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{
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memset(ckey->key, 0, 16);
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ckey->type = 0;
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ckey->seed = 0;
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return 0;
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}
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/*************************************************************/
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// AES128 encrypt key
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static const u8 key_357C[0x30] = {
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0x07,0x3D,0x9E,0x9D,0xA8,0xFD,0x3B,0x2F,0x63,0x18,0x93,0x2E,0xF8,0x57,0xA6,0x64,
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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;
|
|
}
|
|
|
|
/*************************************************************/
|
|
|