6c74a7db80
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21242 a1c6a512-1295-4272-9138-f99709370657
279 lines
8.7 KiB
C++
279 lines
8.7 KiB
C++
/* zenutils - Utilities for working with creative firmwares.
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* Copyright 2007 (c) Rasmus Ry <rasmus.ry{at}gmail.com>
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*
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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; either version 2 of the License, or
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* (at your option) any later version.
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*
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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 for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <iostream>
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#include <iomanip>
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#include <ctime>
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#include <getpot/GetPot>
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#include <file.h>
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#include <updater.h>
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#include <utils.h>
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static const char VERSION[] = "0.1";
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void print_version()
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{
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std::cout
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<< "update_extract - Extracts a Creative firmware from an updater"
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" executable." << std::endl
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<< "Version " << VERSION << std::endl
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<< "Copyright (c) 2007 Rasmus Ry" << std::endl;
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}
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void print_help()
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{
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print_version();
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std::cout << std::endl
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<< "Usage: update_extract [command] [options]" << std::endl
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<< std::endl
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<< " Commands:" << std::endl
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<< " -h,--help" << std::endl
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<< " prints this message." << std::endl
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<< " -u,--updater [file]" << std::endl
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<< " specifies the updater executable." << std::endl
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<< std::endl
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<< " Options:" << std::endl
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<< " -V,--verbose" << std::endl
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<< " prints verbose messages." << std::endl
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<< " -f,--firmware [file]" << std::endl
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<< " specifies the firmware arhive file name." << std::endl
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<< " -k,--key [key]" << std::endl
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<< " specifies the firmware archive key." << std::endl
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<< " -o,--offset [offset]" << std::endl
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<< " specifies the firmware archive offset in c-style"
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" hexadecimal." << std::endl
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<< std::endl
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;
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}
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std::string options_name(const std::string& name)
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{
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return shared::replace_extension(name, ".opt");
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}
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std::string default_firmware_name(const std::string& name)
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{
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return shared::replace_extension(name, "_rk.bin");
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}
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int process_arguments(int argc, char* argv[])
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{
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//--------------------------------------------------------------------
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// Parse input variables.
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//--------------------------------------------------------------------
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GetPot cl(argc, argv);
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if (cl.size() == 1 || cl.search(2, "-h", "--help"))
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{
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print_help();
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return 1;
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}
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std::string updatername;
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if (cl.search("-u") || cl.search("--updater"))
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updatername = cl.next("");
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if (updatername.empty())
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{
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std::cerr << "Updater executable must be specified." << std::endl;
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return 2;
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}
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std::string firmarename = default_firmware_name(updatername);
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if (cl.search("-f") || cl.search("--firmware"))
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firmarename = cl.next(firmarename.c_str());
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bool verbose = false;
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if (cl.search("-V") || cl.search("--verbose"))
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verbose = true;
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// Get or find the firmware archive key.
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std::string key;
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if (cl.search("-k") || cl.search("--key"))
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key = cl.next("");
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if (key.empty())
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{
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if (verbose)
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std::cout << "[*] Looking for firmware archive key..."
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<< std::endl;
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shared::bytes buffer;
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if (!shared::read_file(updatername, buffer))
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{
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std::cerr << "Failed to read the firmware updater executable."
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<< std::endl;
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return 3;
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}
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key = zen::find_firmware_key(&buffer[0], buffer.size());
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if (key.empty())
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{
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std::cerr << "Failed to find the firmware archive key."
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<< std::endl;
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return 4;
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}
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}
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// Get or find the firmware archive offset.
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std::string offset;
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dword offset_pa = 0;
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if (cl.search("-o") || cl.search("--ofset"))
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offset = cl.next("");
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if (offset.empty())
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{
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if (verbose)
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std::cout << "[*] Looking for firmware archive offset..."
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<< std::endl;
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dword offset_va = 0;
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if (!zen::find_firmware_archive(updatername, offset_va, offset_pa))
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{
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std::cerr << "Failed to find the firmware archive offset."
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<< std::endl;
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return 5;
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}
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}
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else
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{
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int offset_val;
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if (!sscanf(offset.c_str(), "0x%x", &offset_val))
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{
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if (!sscanf(offset.c_str(), "0x%X", &offset_val))
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{
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std::cerr << "\'" << offset
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<< "\' is not a valid c-style hexadecimal value."
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<< std::endl;
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return 6;
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}
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}
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offset_pa = static_cast<dword>(offset_val);
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}
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// Read firmware archive size.
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shared::bytes buffer;
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if (!shared::read_file(updatername, buffer, offset_pa, sizeof(dword)))
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{
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std::cerr << "Failed to read the firmware archive size." << std::endl;
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return 7;
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}
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dword archive_size = *(dword*)&buffer[0];
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if (verbose)
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{
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std::cout << "[*] Printing input variables..." << std::endl;
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std::cout << " Updater executable: " << updatername << std::endl;
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std::cout << " Firmware archive: " << firmarename << std::endl;
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std::cout << " Key: " << key << std::endl;
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std::cout << " Offset: "
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<< std::hex << std::showbase << std::setw(10)
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<< std::setfill('0') << std::internal
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<< offset_pa << std::endl;
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std::cout << " Size: "
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<< std::hex << std::showbase << std::setw(10)
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<< std::setfill('0') << std::internal
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<< archive_size << std::endl;
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}
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//--------------------------------------------------------------------
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// Extract the firmware archive from the updater.
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//--------------------------------------------------------------------
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if (verbose)
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std::cout << "[*] Reading firmware archive..." << std::endl;
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// Read the firmware archive.
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offset_pa += sizeof(dword);
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if (!shared::read_file(updatername, buffer, offset_pa, archive_size))
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{
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std::cerr << "Failed to read the firmware archive." << std::endl;
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return 8;
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}
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if (verbose)
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std::cout << "[*] Decrypting firmware archive..." << std::endl;
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// Decrypt the firmware archive.
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if (!zen::crypt_firmware(key.c_str(), &buffer[0], buffer.size()))
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{
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std::cerr << "Failed to decrypt the firmware archive." << std::endl;
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return 9;
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}
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if (verbose)
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std::cout << "[*] Decompressing firmware archive..." << std::endl;
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// Inflate the firmware archive to the output file.
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if (!shared::inflate_to_file(buffer, firmarename.c_str()))
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{
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std::cerr << "Failed to decompress the firmware archive." << std::endl;
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return 10;
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}
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//--------------------------------------------------------------------
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// Generate an options file for the extracted firmware archive.
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//--------------------------------------------------------------------
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// Get options filename for the given input file.
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std::string optionsname = options_name(updatername);
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if (verbose)
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std::cout << "[*] Producing options file..." << std::endl;
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// Produce options file for the given input file.
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std::ofstream ofs;
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ofs.open(optionsname.c_str(), std::ios::binary);
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if (!ofs)
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{
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std::cerr << "Failed to create firmware archive options file."
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<< std::endl;
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return 11;
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}
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time_t timeval = time(NULL);
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ofs << "# Options file generated at: " << ctime(&timeval)
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<< "updater = \'" << shared::double_quote(updatername) << "\'"
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<< std::endl
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<< "firmware = \'" << shared::double_quote(firmarename) << "\'"
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<< std::endl
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<< "offset = " << (offset_pa - sizeof(dword)) << std::endl
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<< "size = " << archive_size << std::endl
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<< "key = \'" << key << "\'" << std::endl;
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return 0;
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}
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int main(int argc, char* argv[])
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{
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try
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{
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return process_arguments(argc, argv);
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}
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catch (const std::exception& xcpt)
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{
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std::cerr << "Exception caught: " << xcpt.what() << std::endl;
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return -1;
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}
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catch (...)
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{
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std::cerr << "Unknown exception caught." << std::endl;
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return -2;
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}
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return -3;
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}
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