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REWise/src/rewise.c

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/* This file is part of REWise.
*
* REWise is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* REWise is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <linux/limits.h> // PATH_MAX, NAME_MAX
#include <stdlib.h>
#include <getopt.h>
#include <time.h>
#include <libgen.h> // dirname
#include <errno.h>
#include <sys/stat.h> // mkdir
#include <utime.h>
#include <sys/statvfs.h>
#include "print.h"
#include "reader.h"
#include "inflate.h"
#include "pefile.h"
#include "errors.h"
#include "wiseoverlay.h"
#include "wisescript.h"
#include "version.h"
#ifndef REWISE_DEFAULT_TMP_PATH
#define REWISE_DEFAULT_TMP_PATH "/tmp/"
#endif
#define SIZE_KiB 1024
#define SIZE_MiB 1048576 // 1024^2
#define SIZE_GiB 1073741824 // 1024^3
enum Operation {
OP_NONE = 0,
OP_EXTRACT = 1,
OP_EXTRACT_RAW = 2,
OP_LIST = 3,
OP_VERIFY = 4,
OP_HELP = 5,
OP_SCRIPT_DEBUG = 6
};
void printPrettySize(size_t size) {
if (size > SIZE_GiB) {
printf("%.2f GiB", (float)size / SIZE_GiB);
}
else
if (size > SIZE_MiB) {
printf("%.2f MiB", (float)size / SIZE_MiB);
}
else
if (size > SIZE_KiB) {
printf("%.2f KiB", (float)size / SIZE_KiB);
}
else {
printf("%zu bytes", size);
}
}
unsigned long getFreeDiskSpace(char * path) {
struct statvfs fsStats;
if (statvfs((const char *)path, &fsStats) != 0) {
printError("Failed to determine free disk space for '%s'. Errno: %s\n",
strerror(errno));
return 0;
}
return fsStats.f_bsize * fsStats.f_bavail;
}
void convertMsDosTime(struct tm * destTime, uint16_t date, uint16_t time) {
destTime->tm_year = (int)((date >> 9) + 80);
destTime->tm_mon = (int)((date >> 5) & 0b0000000000001111);
destTime->tm_mday = (int)(date & 0b0000000000011111);
destTime->tm_hour = (int)(time >> 11);
destTime->tm_min = (int)((time >> 5) & 0b0000000000111111);
destTime->tm_sec = (int)(time & 0b0000000000011111) * 2;
}
static InflateObject * InflateObjPtr;
static long ScriptDeflateOffset;
#define MAX_OUTPUT_PATH (PATH_MAX - WIN_PATH_MAX) - 2
static char OutputPath[MAX_OUTPUT_PATH]; // should be absolute and end with a '/'
static char TempPath[MAX_OUTPUT_PATH] = REWISE_DEFAULT_TMP_PATH;
static char PreserveTmp = 0;
static char NoExtract = 0;
void printHelp(void) {
printf("==============================================================\n");
printf(" Welcome to REWise version %s\n", REWISE_VERSION_STR);
printf("==============================================================\n\n");
printf(" Usage: rewise [OPERATION] [OPTIONS] INPUT_FILE\n\n");
printf(" OPERATIONS\n");
printf(" -x --extract OUTPUT_PATH Extract files.\n");
printf(" -r --raw OUTPUT_PATH Extract all files in the overlay "
"data. This does not move/rename "
"files!\n");
printf(" -l --list List files.\n");
printf(" -V --verify Run extract without actually "
"outputting files, crc32s will be "
"checked.\n");
printf(" -z --script-debug Print parsed WiseScript.bin\n");
printf(" -v --version Print version and exit.\n");
printf(" -h --help Display this HELP.\n");
printf("\n");
printf(" OPTIONS\n");
printf(" -p --preserve Don't delete TMP files.\n");
printf(" -t --tmp-path TMP_PATH Set temporary path, default: %s\n",
REWISE_DEFAULT_TMP_PATH);
printf(" -d --debug Print debug info.\n");
printf(" -s --silent Be silent, don't print anything.\n");
printf(" -n --no-extract Don't extract anything. This will "
"be ignored with -x or -r. It also "
"will not try to remove TMP files, "
"so -p won't do anything.\n");
printf("\n");
printf(" NOTES\n");
printf(" - Path to directory OUTPUT_PATH and TMP_PATH should exist and "
"be writable.\n");
}
void printFile(WiseScriptFileHeader * data) {
struct tm fileDatetime;
convertMsDosTime(&fileDatetime, data->date, data->time);
printf("% 12u %02d-%02d-%04d %02d:%02d:%02d '%s'\n", data->inflatedSize,
fileDatetime.tm_mday, fileDatetime.tm_mon, fileDatetime.tm_year + 1900,
fileDatetime.tm_hour, fileDatetime.tm_min, fileDatetime.tm_sec,
data->destFile);
}
/* preparePath() - Joins the two given paths to dest and tries to create the
* directories that don't exist yet.
* param subPath: Rest of the filepath (including file) from WiseScript.bin
* Should not be larger then (WIN_PATH_MAX + 1)
* param dest : A pre-allocated char buffer with size PATH_MAX */
bool preparePath(char * basePath, char * subPath, char * dest) {
// Join paths
if ((strlen(basePath) + strlen(subPath) + 1) > PATH_MAX) {
printError("Overflow of final path > PATH_MAX\n");
return false;
}
strcpy(dest, basePath);
strcat(dest, subPath);
// Try to create directories as needed
char * outputFilePath;
char * currentSubPath;
char * separator;
// make a copy which strchr may manipulate.
outputFilePath = strdup(dest);
if (outputFilePath == NULL) {
printError("Errno: %s\n", strerror(errno));
return false;
}
// get the path without filename
currentSubPath = dirname(outputFilePath);
// get the path its root (string until first '/')
separator = strchr(currentSubPath, '/');
// This should not happen because the given path by the user should exist.
if (separator == NULL) {
printError("This should not happen, please report if it does! (1)\n");
return false;
}
// iterate through all sub-directories from root
while (separator != NULL) {
// terminate the dirName string on next occurance of '/'
separator[0] = 0x00;
// do not create root
if (currentSubPath[0] != 0x00) {
// stat currentSubPath
if (access(currentSubPath, F_OK) != 0) {
// currentSubPath exists but is not a directory
if (errno == ENOTDIR) {
printError("Extract subpath '%s' exists but is not a directory!\n",
currentSubPath);
free(outputFilePath);
return false;
}
// currentSubPath does not exist, try to create a new directory
if (errno == ENOENT) {
errno = 0;
if (mkdir(currentSubPath, 0777) != 0) {
printError("Failed to create subpath (1): '%s'\n", currentSubPath);
printError("Errno: %s\n", strerror(errno));
free(outputFilePath);
return false;
}
}
}
}
// reset the previous set terminator
separator[0] = '/';
// set separator to next occurrence of '/' (will be set to NULL when
// there are no more occurrences of '/'.
separator = strchr(separator + 1, '/');
}
// last subdir
if (access(currentSubPath, F_OK) != 0) {
// currentSubPath exists but is not a directory
if (errno == ENOTDIR) {
printError("Extract path '%s' exists but is not a directory!\n",
currentSubPath);
free(outputFilePath);
return false;
}
// currentSubPath does not exist, try to create a new directory
if (errno == ENOENT) {
if (mkdir(currentSubPath, 0777) != 0) {
printError("Failed to create subpath (2): '%s'\n", currentSubPath);
printError("Errno: %s\n", strerror(errno));
free(outputFilePath);
return false;
}
}
}
// cleanup
free(outputFilePath);
return true;
}
void extractFile(WiseScriptFileHeader * data) {
bool result;
char outputFilePath[PATH_MAX];
// Create the final absolute filepath and make sure the path exists (will be
// created when it doesn't exist).
if (preparePath(OutputPath, data->destFile, outputFilePath) == false) {
printError("preparePath failed.\n");
stopWiseScriptParse();
return;
}
// Seek to deflated file start
if (fseek(InflateObjPtr->inputFile, ((long)data->deflateStart) + ScriptDeflateOffset, SEEK_SET) != 0) {
printError("Failed seek to file offset 0x%08X\n", data->deflateStart);
printError("Errno: %s\n", strerror(errno));
stopWiseScriptParse();
return;
}
// Inflate/extract the file
result = inflateExtractNextFile(InflateObjPtr, outputFilePath);
if (result == false) {
printError("Failed to extract '%s'\n", outputFilePath);
stopWiseScriptParse();
return;
}
// Set file access/modification datetime
struct tm fileCreation;
time_t creationSeconds;
convertMsDosTime(&fileCreation, data->date, data->time);
creationSeconds = mktime(&fileCreation);
const struct utimbuf times = {
.actime = creationSeconds,
.modtime = creationSeconds
};
if (utime(outputFilePath, &times) != 0) {
printWarning("Failed to set access and modification datetime for file "
"'%s'\n", outputFilePath);
}
printInfo("Extracted %s\n", data->destFile);
}
void noExtractFile(WiseScriptFileHeader * data) {
// Inflate/extract the file
bool result = inflateExtractNextFile(InflateObjPtr, NULL);
if (result == false) {
printError("Failed to no-extract '%s'\n", data->destFile);
stopWiseScriptParse();
return;
}
printInfo("CRC32 success for '%s'\n", data->destFile);
}
bool setPath(const char * optarg, char * dest) {
// Resolve absolute path
char * outputPath = realpath(optarg, dest);
if (outputPath == NULL) {
printError("Invalid PATH given, could not resolve absolute path for "
"'%s'. Errno: %s\n", optarg, strerror(errno));
return false;
}
size_t outputPathLen = strlen(outputPath);
// -2 for the potential '/' we may add
if (outputPathLen >= (MAX_OUTPUT_PATH - 1)) {
printError("Absolute path of PATH is to large.\n");
return false;
}
// Make sure the path ends with a '/'
if (dest[outputPathLen - 1] != '/') {
strcat(dest, "/");
}
// Make sure the path exists
if (access(dest, F_OK) != 0) {
// dest exists but is not a directory
if (errno == ENOTDIR) {
printError("'%s' is not a directory.\n", dest);
return false;
}
// NOTE: realpath would have failed when the directory does not exist.
// dest does not exist
/*if (errno == ENOENT) {
printError("'%s' does not exist.\n", dest);
return false;
}*/
}
return true;
}
int main(int argc, char *argv[]) {
char inputFile[PATH_MAX];
long overlayOffset;
FILE * fp;
REWError status;
enum Operation operation = OP_NONE;
inputFile[0] = 0x00;
// https://www.gnu.org/software/libc/manual/html_node/Getopt-Long-Options.html
// https://www.gnu.org/software/libc/manual/html_node/Getopt-Long-Option-Example.html
struct option long_options[] = {
// OPERATIONS
{"extract" , required_argument, NULL, 'x'},
{"raw" , required_argument, NULL, 'r'},
{"list" , no_argument , NULL, 'l'},
{"verify" , no_argument , NULL, 'V'},
{"script-debug", no_argument , NULL, 'z'},
{"version" , no_argument , NULL, 'v'},
{"help" , no_argument , NULL, 'h'},
// OPTIONS
{"temp" , required_argument, NULL, 't'},
{"debug" , no_argument , NULL, 'd'},
{"preserve" , no_argument , NULL, 'p'},
{"silent" , no_argument , NULL, 's'},
{"no-extract" , no_argument , NULL, 'n'},
{NULL , 0 , NULL, 0}
};
int option_index = 0;
for (;;) {
int opt = getopt_long(argc, argv, "x:r:t:lhdspznVv",
long_options, &option_index);
if (opt == -1) {
break;
}
switch (opt) {
// OPERATIONS
case 'x':
{
if (operation != OP_NONE) {
printError("More then one operation is set! Do set only one.\n");
return 1;
}
operation = OP_EXTRACT;
if (setPath(optarg, OutputPath) == false) {
return 1;
}
}
break;
case 'r':
if (operation != OP_NONE) {
printError("More then one operation is set! Do set only one.\n");
return 1;
}
operation = OP_EXTRACT_RAW;
if (setPath(optarg, OutputPath) == false) {
return 1;
}
break;
case 'l':
if (operation != OP_NONE) {
printError("More then one operation is set! Do set only one.\n");
return 1;
}
operation = OP_LIST;
break;
case 'V':
if (operation != OP_NONE) {
printError("More then one operation is set! Do set only one.\n");
return 1;
}
operation = OP_VERIFY;
break;
case 'z':
if (operation != OP_NONE) {
printError("More then one operation is set! Do set only one.\n");
return 1;
}
operation = OP_SCRIPT_DEBUG;
break;
case 'v':
printf("REWise v%s\n", REWISE_VERSION_STR);
return 0;
case 'h':
printHelp();
return 0;
// OPTIONS
case 'd':
setPrintFlag(PRINT_DEBUG);
break;
case 's':
setPrintFlags(PRINT_SILENT);
break;
case 't':
if (setPath(optarg, TempPath) == false) {
printError("Invalid TMP_PATH given.\n");
return 1;
}
break;
case 'p':
PreserveTmp = 1;
break;
case 'n':
NoExtract = 1;
break;
case '?':
// invalid option
printError("Invalid operation or option\n");
return 1;
default:
printError("default\n");
break;
}
}
if ((argc - 1 ) < optind) {
printError("Please supply a input file\n");
return 1;
}
if ((argc - 1 ) > optind) {
printError("Please supply only one input file\n");
return 1;
}
if (strlen(argv[optind]) > (PATH_MAX - 1)) {
printError("What are you trying to do? INPUT_FILE is larger then PATH_MAX\n");
return 1;
}
strcpy(inputFile, argv[optind]);
if (operation == OP_NONE) {
printError("Please specify a operation.\n");
return 1;
}
/* Check if input file exists */
if (access(inputFile, F_OK) != 0) {
printError("InputFile '%s' not found. Errno: %s\n", inputFile,
strerror(errno));
return 1;
}
// Get offset to overlay data
overlayOffset = pefileGetOverlayOffset(inputFile);
if (overlayOffset == -1) {
printError("Failed to find overlay offset.\n", inputFile);
return 1;
}
printDebug("InputFile: %s\n", inputFile);
printDebug("OverlayOffset: %ld\n", overlayOffset);
/* Open inputFile */
fp = fopen(inputFile, "rb");
if (fp == NULL) {
printError("Failed to open inputFile '%s'\n", inputFile);
printError("Errno: %s\n", strerror(errno));
return 1;
};
// Seek to overlayData
if (fseek(fp, overlayOffset, SEEK_SET) != 0) {
printError("Failed to seek to overlayData. Offset: 0x%08X\n", overlayOffset);
printError("Errno: %s\n", strerror(errno));
fclose(fp);
return 1;
}
// Read Wise overlay header
WiseOverlayHeader overlayHeader;
if ((status = readWiseOverlayHeader(fp, &overlayHeader)) != REWERR_OK) {
printError("Failed to read WiseOverlayHeader.\n");
fclose(fp);
return 1;
}
freeWiseOverlayHeader(&overlayHeader);
// Here we arrived at the delated data, each entry followed by a CRC32
// https://en.wikipedia.org/wiki/DEFLATE
if (huffmanInitFixedTrees() == false) {
printError("Failed to huffmanInitFixedTrees, out of mem?\n");
fclose(fp);
return 1;
}
// Initial check on free disk space (TMP_PATH)
unsigned long tmpFreeDiskSpace = getFreeDiskSpace(TempPath);
if (tmpFreeDiskSpace == 0) { // failed to determine free disk space
fclose(fp);
return 1;
}
// make sure at-least 1 MiB is available at the TMP path
if (tmpFreeDiskSpace < SIZE_MiB) {
printError("At-least 1 MiB of free space is required in the TMP_PATH.\n");
fclose(fp);
return 1;
}
bool result;
InflateObject inflateObj;
inflateInit(&inflateObj, fp);
InflateObjPtr = &inflateObj;
// Raw extract
if (operation == OP_EXTRACT_RAW) {
uint32_t extractCount = 0;
char extractFilePath[PATH_MAX];
// Start inflating and outputting files
while (ftell(fp) < inflateObj.inputFileSize) {
char fileName[21];
if (snprintf(fileName, 20, "EXTRACTED_%09u", extractCount) > 20) {
// truncated
printError("Failed to format filename, it truncated.\n");
fclose(fp);
huffmanFreeFixedTrees();
return 1;
}
if (preparePath(OutputPath, fileName, extractFilePath) == false) {
printError("Failed to create directories for '%s'.\n", fileName);
fclose(fp);
huffmanFreeFixedTrees();
return 1;
}
result = inflateExtractNextFile(&inflateObj, (const char *)extractFilePath);
if (result == false) {
printError("Failed to extract '%s'.\n", extractFilePath);
fclose(fp);
huffmanFreeFixedTrees();
return 1;
}
printInfo("Extracted '%s'\n", extractFilePath);
extractCount++;
}
printInfo("Extracted %d files.\n", extractCount);
}
else {
char tmpFileScript[PATH_MAX];
// Skip WiseColors.dib
if (NoExtract == 0) {
result = inflateExtractNextFile(&inflateObj, NULL);
if (result == false) {
printError("Failed to extract 'WiseColors.dib'.\n");
fclose(fp);
huffmanFreeFixedTrees();
return 1;
}
}
// Create filepath for WiseScript.bin
if (preparePath(TempPath, "WiseScript.bin", tmpFileScript) == false) {
fclose(fp);
huffmanFreeFixedTrees();
printf("Failed to create filepath for WiseScript.bin.\n");
return 1;
}
// Extract WiseScript.bin
if (NoExtract == 0) {
result = inflateExtractNextFile(&inflateObj, tmpFileScript);
if (result == false) {
printError("Failed to extract '%s'.\n", tmpFileScript);
fclose(fp);
huffmanFreeFixedTrees();
return 1;
}
}
// Determine the inflate data offset inside WiseScript.bin (this needs to
// be added to the inflateStart we got for files from WiseScript to get to
// the real inflateStart offset in the PE file.)
WiseScriptParsedInfo * parsedInfo = wiseScriptGetParsedInfo(tmpFileScript);
ScriptDeflateOffset = inflateObj.inputFileSize - parsedInfo->inflateStartOffset;
printDebug("scriptDeflateOffset: %ld (0x%08X).\n", parsedInfo->inflateStartOffset);
WiseScriptCallbacks callbacks;
initWiseScriptCallbacks(&callbacks);
// LIST
if (operation == OP_LIST) {
callbacks.cb_0x00 = &printFile;
printf(" FILESIZE FILEDATE FILETIME FILEPATH\n");
printf("------------ ---------- -------- ----------------------------\n");
status = parseWiseScript(tmpFileScript, &callbacks);
if (status != REWERR_OK) {
printError("Parsing WiseScript failed.\n");
}
printf("------------ ---------- -------- ----------------------------\n");
printf("Total size: ");
printPrettySize(parsedInfo->inflatedSize0x00);
printf(" (%zu bytes)\n", parsedInfo->inflatedSize0x00);
}
// EXTRACT
else
if (operation == OP_EXTRACT) {
// Check if there is enough free disk space
unsigned long outputFreeDiskSpace = getFreeDiskSpace(OutputPath);
if (outputFreeDiskSpace == 0) { // failed to determine free disk space
fclose(fp);
return 1;
}
if (outputFreeDiskSpace <= parsedInfo->inflatedSize0x00) {
printError("Not enough free disk space at '%s'. Required: %ld Left: "
"%ld\n", OutputPath, parsedInfo->inflatedSize0x00,
outputFreeDiskSpace);
fclose(fp);
return 1;
}
// Start inflating and outputting files
callbacks.cb_0x00 = &extractFile;
status = parseWiseScript(tmpFileScript, &callbacks);
// Something went wrong
if (status != REWERR_OK) {
printError("Parsing WiseScript failed.\n");
}
}
// SCRIPT_DEBUG
else
if (operation == OP_SCRIPT_DEBUG) {
status = wiseScriptDebugPrint(tmpFileScript);
if (status != REWERR_OK) {
printError("Debug print WiseScript failed.\n");
}
}
else
if (operation == OP_VERIFY) {
callbacks.cb_0x00 = &noExtractFile;
status = parseWiseScript(tmpFileScript, &callbacks);
if (status != REWERR_OK) {
printError("Parsing WiseScript failed.\n");
}
printInfo("All looks good!\n");
}
// remove tmp files
if (PreserveTmp == 0 && NoExtract == 0) {
if (remove(tmpFileScript) != 0) {
printError("Failed to remove '%s'. Errno: %s\n", tmpFileScript,
strerror(errno));
}
}
}
// Cleanup
huffmanFreeFixedTrees();
fclose(fp);
return status;
}
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