mirror of
https://github.com/libretro/ppsspp.git
synced 2024-12-13 03:19:25 +00:00
348 lines
8.2 KiB
C++
348 lines
8.2 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include "BlockDevices.h"
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#include <cstdio>
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#include <cstring>
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extern "C"
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{
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#include "zlib.h"
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#include "ext/libkirk/amctrl.h"
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#include "ext/libkirk/kirk_engine.h"
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};
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BlockDevice *constructBlockDevice(const char *filename) {
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// Check for CISO
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FILE *f = fopen(filename, "rb");
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if (!f)
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return 0;
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char buffer[4];
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auto size = fread(buffer, 1, 4, f); //size_t
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fseek(f, 0, SEEK_SET);
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if (!memcmp(buffer, "CISO", 4) && size == 4)
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return new CISOFileBlockDevice(f);
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else if (!memcmp(buffer, "\x00PBP", 4) && size == 4)
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return new NPDRMDemoBlockDevice(f);
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else
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return new FileBlockDevice(f);
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}
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FileBlockDevice::FileBlockDevice(FILE *file)
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: f(file)
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{
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fseek(f,0,SEEK_END);
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filesize = ftell(f);
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fseek(f,0,SEEK_SET);
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}
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FileBlockDevice::~FileBlockDevice()
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{
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fclose(f);
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}
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bool FileBlockDevice::ReadBlock(int blockNumber, u8 *outPtr)
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{
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fseek(f, blockNumber * GetBlockSize(), SEEK_SET);
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if(fread(outPtr, 1, 2048, f) != 2048)
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DEBUG_LOG(LOADER, "Could not read 2048 bytes from block");
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return true;
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}
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// .CSO format
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// compressed ISO(9660) header format
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typedef struct ciso_header
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{
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unsigned char magic[4]; // +00 : 'C','I','S','O'
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u32 header_size; // +04 : header size (==0x18)
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u64 total_bytes; // +08 : number of original data size
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u32 block_size; // +10 : number of compressed block size
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unsigned char ver; // +14 : version 01
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unsigned char align; // +15 : align of index value
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unsigned char rsv_06[2]; // +16 : reserved
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#if 0
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// INDEX BLOCK
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unsigned int index[0]; // +18 : block[0] index
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unsigned int index[1]; // +1C : block[1] index
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:
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:
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unsigned int index[last]; // +?? : block[last]
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unsigned int index[last+1]; // +?? : end of last data point
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// DATA BLOCK
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unsigned char data[]; // +?? : compressed or plain sector data
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#endif
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} CISO_H;
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// TODO: Need much better error handling.
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CISOFileBlockDevice::CISOFileBlockDevice(FILE *file)
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: f(file)
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{
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// CISO format is EXTREMELY crappy and incomplete. All tools make broken CISO.
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f = file;
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CISO_H hdr;
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size_t readSize = fread(&hdr, sizeof(CISO_H), 1, f);
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if (readSize != 1 || memcmp(hdr.magic, "CISO", 4) != 0)
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{
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WARN_LOG(LOADER, "Invalid CSO!");
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}
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else
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{
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VERBOSE_LOG(LOADER, "Valid CSO!");
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}
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if (hdr.ver > 1)
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{
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ERROR_LOG(LOADER, "CSO version too high!");
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//ARGH!
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}
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int hdrSize = hdr.header_size;
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blockSize = hdr.block_size;
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if (blockSize != 0x800)
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{
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ERROR_LOG(LOADER, "CSO Unsupported Block Size");
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}
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indexShift = hdr.align;
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u64 totalSize = hdr.total_bytes;
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numBlocks = (u32)(totalSize / blockSize);
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VERBOSE_LOG(LOADER, "CSO hdrSize=%i numBlocks=%i align=%i", hdrSize, numBlocks, indexShift);
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u32 indexSize = numBlocks + 1;
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index = new u32[indexSize];
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if(fread(index, sizeof(u32), indexSize, f) != indexSize)
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memset(index, 0, indexSize * sizeof(u32));
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}
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CISOFileBlockDevice::~CISOFileBlockDevice()
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{
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fclose(f);
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delete [] index;
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}
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bool CISOFileBlockDevice::ReadBlock(int blockNumber, u8 *outPtr)
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{
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if ((u32)blockNumber >= numBlocks)
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{
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memset(outPtr, 0, 2048);
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return false;
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}
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u32 idx = index[blockNumber];
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u32 idx2 = index[blockNumber+1];
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u8 inbuffer[4096]; //too big
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z_stream z;
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int plain = idx & 0x80000000;
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idx = (idx & 0x7FFFFFFF) << indexShift;
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idx2 = (idx2 & 0x7FFFFFFF) << indexShift;
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u32 compressedReadPos = idx;
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u32 compressedReadSize = idx2 - idx;
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fseek(f, compressedReadPos, SEEK_SET);
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u32 readSize = (u32)fread(inbuffer, 1, compressedReadSize, f);
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if (plain)
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{
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memset(outPtr, 0, 2048);
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memcpy(outPtr, inbuffer, readSize);
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}
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else
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{
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memset(outPtr, 0, 2048);
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z.zalloc = Z_NULL;
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z.zfree = Z_NULL;
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z.opaque = Z_NULL;
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if(inflateInit2(&z, -15) != Z_OK)
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{
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ERROR_LOG(LOADER, "deflateInit ERROR : %s\n", (z.msg) ? z.msg : "???");
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return false;
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}
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z.avail_in = readSize;
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z.next_out = outPtr;
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z.avail_out = blockSize;
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z.next_in = inbuffer;
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int status = inflate(&z, Z_FULL_FLUSH);
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if(status != Z_STREAM_END)
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//if (status != Z_OK)
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{
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ERROR_LOG(LOADER, "block %d:inflate : %s[%d]\n", blockNumber, (z.msg) ? z.msg : "error", status);
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inflateEnd(&z);
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return 1;
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}
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int cmp_size = blockSize - z.avail_out;
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if (cmp_size != (int)blockSize)
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{
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ERROR_LOG(LOADER, "block %d : block size error %d != %d\n", blockNumber, cmp_size, blockSize);
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inflateEnd(&z);
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return false;
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}
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inflateEnd(&z);
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}
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return true;
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}
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NPDRMDemoBlockDevice::NPDRMDemoBlockDevice(FILE *file)
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: f(file)
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{
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MAC_KEY mkey;
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CIPHER_KEY ckey;
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u8 np_header[256];
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u32 tableOffset, tableSize;
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u32 lbaStart, lbaEnd;
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fseek(f, 0x24, SEEK_SET);
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fread(&psarOffset, 1, 4, f);
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fseek(f, psarOffset, SEEK_SET);
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size_t readSize = fread(&np_header, 1, 256, f);
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if(readSize!=256){
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ERROR_LOG(LOADER, "Invalid NPUMDIMG header!");
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}
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kirk_init();
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// getkey
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sceDrmBBMacInit(&mkey, 3);
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sceDrmBBMacUpdate(&mkey, np_header, 0xc0);
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bbmac_getkey(&mkey, np_header+0xc0, vkey);
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// decrypt NP header
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memcpy(hkey, np_header+0xa0, 0x10);
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sceDrmBBCipherInit(&ckey, 1, 2, hkey, vkey, 0);
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sceDrmBBCipherUpdate(&ckey, np_header+0x40, 0x60);
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sceDrmBBCipherFinal(&ckey);
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lbaStart = *(u32*)(np_header+0x54); // LBA start
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lbaEnd = *(u32*)(np_header+0x64); // LBA end
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lbaSize = (lbaEnd-lbaStart+1); // LBA size of ISO
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blockLBAs = *(u32*)(np_header+0x0c); // block size in LBA
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blockSize = blockLBAs*2048;
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numBlocks = (lbaSize+blockLBAs-1)/blockLBAs; // total blocks;
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blockBuf = new u8[blockSize];
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tempBuf = new u8[blockSize];
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tableOffset = *(u32*)(np_header+0x6c); // table offset
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fseek(f, psarOffset+tableOffset, SEEK_SET);
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tableSize = numBlocks*32;
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table = new table_info[numBlocks];
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readSize = fread(table, 1, tableSize, f);
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if(readSize!=tableSize){
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ERROR_LOG(LOADER, "Invalid NPUMDIMG table!");
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}
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u32 *p = (u32*)table;
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u32 i, k0, k1, k2, k3;
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for(i=0; i<numBlocks; i++){
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k0 = p[0]^p[1];
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k1 = p[1]^p[2];
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k2 = p[0]^p[3];
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k3 = p[2]^p[3];
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p[4] ^= k3;
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p[5] ^= k1;
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p[6] ^= k2;
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p[7] ^= k0;
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p += 8;
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}
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currentBlock = -1;
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}
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NPDRMDemoBlockDevice::~NPDRMDemoBlockDevice()
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{
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fclose(f);
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delete [] table;
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delete [] tempBuf;
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delete [] blockBuf;
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}
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int lzrc_decompress(void *out, int out_len, void *in, int in_len);
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bool NPDRMDemoBlockDevice::ReadBlock(int blockNumber, u8 *outPtr)
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{
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CIPHER_KEY ckey;
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int block, lba, lzsize;
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size_t readSize;
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u8 *readBuf;
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lba = blockNumber-currentBlock;
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if(lba>=0 && lba<blockLBAs){
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memcpy(outPtr, blockBuf+lba*2048, 2048);
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return true;
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}
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block = blockNumber/blockLBAs;
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lba = blockNumber%blockLBAs;
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currentBlock = block*blockLBAs;
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if(table[block].unk_1c!=0){
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if(block==(numBlocks-1))
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return true; // demos make by fake_np
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else
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return false;
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}
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fseek(f, psarOffset+table[block].offset, SEEK_SET);
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if(table[block].size<blockSize)
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readBuf = tempBuf;
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else
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readBuf = blockBuf;
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readSize = fread(readBuf, 1, table[block].size, f);
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if(readSize != (size_t)table[block].size){
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if(block==(numBlocks-1))
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return true;
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else
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return false;
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}
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if((table[block].flag&1)==0){
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// skip mac check
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}
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if((table[block].flag&4)==0){
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sceDrmBBCipherInit(&ckey, 1, 2, hkey, vkey, table[block].offset>>4);
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sceDrmBBCipherUpdate(&ckey, readBuf, table[block].size);
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sceDrmBBCipherFinal(&ckey);
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}
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if(table[block].size<blockSize){
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lzsize = lzrc_decompress(blockBuf, 0x00100000, readBuf, table[block].size);
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if(lzsize!=blockSize){
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ERROR_LOG(LOADER, "LZRC decompress error! lzsize=%d\n", lzsize);
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return false;
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}
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}
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memcpy(outPtr, blockBuf+lba*2048, 2048);
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return true;
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}
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