expdfpk解包完整项目代码（for VS2013）

// expdfpk.cpp, v1.19 2013/11/27 // coded by asmodean // contact: // web: http://asmodean.reverse.net // email: asmodean [at] hush.com // irc: asmodean on efnet (irc.efnet.net) // This tool extracts data from FPK 0100 (*.fpk) archives used in Pretty Devil. //#include "as-util.h" #include "common.h" struct FPKHDR { //uint8_t signature[8]; // "FPK\x000100" uint32_t toc_offset; uint32_t entry_count; uint32_t unknown1; // char directory_name[?]; // don't care }; struct FPKENTRY { uint32_t obfuscated; uint32_t offset; uint32_t length; char filename[12]; }; struct FBXHDR { uint8_t signature[4]; // "FBX\x1" uint8_t extension[3]; uint8_t hdr_length; uint32_t length; uint32_t original_length; }; void unobfuscate(uint8_t* buff, uint32_t len, uint32_t seed) { auto p = (uint32_t*)buff; p += (len / 4) - 1; uint32_t k1 = seed + len - 4; uint32_t k2 = seed; while (p >= (uint32_t*)buff) { *p = (*p - k1) ^ k2; k2 = ((k2 - *p) >> 7) ^ ((k1 + k2) << 7); k1 -= 3; p--; } } uint32_t guess_unobfuscate(uint8_t* buff, uint32_t len) { static const uint32_t SEEDS[] = { 0x00000000, 0x392B2A31, 0x962C0093, 0xD308A71F, 0xE09A774B, 0x430A939D, 0xCF09A4E1, 0xB071CC95, 0xE293F307, 0x26E183B5, 0x0527CC63, 0x7A0F44E3, 0x902ACC72, 0xC34A7BB7, 0x12CA06E3, 0xDF16A057, 0x250EB69A, 0xF244B07E, 0x7EF244B0, 0x3E14884A, 0x7B2A67E1, 0x2F0598B4, 0x0F24A3A9, 0x192A3B4C, 0x90AC22B9, }; static const uint32_t SEED_COUNT = sizeof(SEEDS) / sizeof(SEEDS[0]); struct TRL { uint32_t length; uint32_t unknown; }; static uint32_t seed = -1; if (seed == -1) { auto temp_buff = new uint8_t[len]; auto trl = (TRL*)(temp_buff + len - sizeof(TRL)); for (uint32_t i = 0; i < SEED_COUNT && seed == -1; i++) { memcpy(temp_buff, buff, len); unobfuscate(temp_buff, len, SEEDS[i]); if (((trl->length + 3) & ~3) == len - 8) { seed = SEEDS[i]; break; } } delete[] temp_buff; } if (seed != -1) { unobfuscate(buff, len, seed); auto trl = (TRL*)(buff + len - sizeof(TRL)); len = trl->length; } return len; } void unfbx(uint8_t* buff, uint32_t len, uint8_t* out_buff, uint32_t out_len) { auto end = buff + len; auto out_end = out_buff + out_len; while (out_buff < out_end) { uint8_t flags = *buff++; uint32_t p = 0; uint32_t n = 0; for (uint32_t i = 0; i < 4 && out_buff < out_end; i++) { switch (flags & 3) { case 0: *out_buff++ = *buff++; break; case 1: n = *buff++ + 2; while (n--) { *out_buff++ = *buff++; } break; case 2: p = *buff++ << 8; p |= *buff++; n = (p & 0x1F) + 4; p >>= 5; while (n-- && out_buff < out_end) { *out_buff = *(out_buff - p - 1); out_buff++; } break; case 3: { uint8_t c = *buff++; n = c & 0x3F; switch (c >> 6) { case 0: n = (n << 8) + *buff++ + 0x102; while (n-- && out_buff < out_end) { *out_buff++ = *buff++; } break; case 1: p = *buff++ << 8; p |= *buff++; n = (n << 5) | (p & 0x1F); n += 0x24; p >>= 5; while (n-- && out_buff < out_end) { *out_buff = *(out_buff - p - 1); out_buff++; } break; case 2: break; // What the hell is this for case 3: buff += n; i = 4; break; } } break; } flags >>= 2; } } } int main(int argc, char** argv) { if (argc != 2) { fprintf(stderr, "expdfpk v1.19 by asmodean\n\n"); fprintf(stderr, "usage: %s <input.fpk>\n", argv[0]); return -1; } using namespace std; string in_filename(argv[1]); //string in_filename_upper = as::stringtou(in_filename); int fd = as::open_or_die(in_filename, O_RDONLY | O_BINARY); FPKHDR hdr; _read(fd, &hdr, sizeof(hdr)); auto entries = new FPKENTRY[hdr.entry_count]; _lseek(fd, hdr.toc_offset, SEEK_SET); _read(fd, entries, sizeof(FPKENTRY)* hdr.entry_count); for (uint32_t i = 0; i < hdr.entry_count; i++) { uint32_t len = entries[i].length; auto buff = new uint8_t[len]; _lseek(fd, entries[i].offset, SEEK_SET); _read(fd, buff, len); if (entries[i].obfuscated) { len = guess_unobfuscate(buff, len); } auto fbxhdr = (FBXHDR*)buff; char filename[sizeof(entries[i].filename) + 1] = { 0 }; memcpy(filename, entries[i].filename, sizeof(entries[i].filename)); if (!memcmp(fbxhdr->signature, "FBX\x01", 4)) { uint32_t out_len = fbxhdr->original_length; auto out_buff = new uint8_t[out_len]; unfbx(buff + sizeof(*fbxhdr), len - sizeof(*fbxhdr), out_buff, out_len); char ext[sizeof(fbxhdr->extension) + 1] = { 0 }; memcpy(ext, fbxhdr->extension, sizeof(fbxhdr->extension)); as::write_file(as::stringf("%s.%s", as::get_file_prefix(filename).c_str(), ext), out_buff, out_len); delete[] out_buff; } else { as::write_file(filename, buff, len); } delete[] buff; } _close(fd); return 0; }