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mkextunpack_main.c
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mkextunpack_main.c
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/*
* Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <CoreFoundation/CoreFoundation.h>
#include <IOKit/kext/OSKext.h>
#include <IOKit/kext/OSKextPrivate.h>
#include <IOKit/kext/fat_util.h>
#include <System/libkern/mkext.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <unistd.h>
#include <libc.h>
#include <mach-o/arch.h>
#include <mach-o/fat.h>
#include <mach/mach.h>
#include <mach/mach_types.h>
#include <mach/kmod.h>
#include "kext_tools_util.h"
// not a utility.[ch] customer yet
static const char * progname = "mkextunpack";
static Boolean gVerbose = false;
u_int32_t local_adler32(u_int8_t *buffer, int32_t length);
Boolean getMkextDataForArch(
u_int8_t * fileData,
size_t fileSize,
const NXArchInfo * archInfo,
void ** mkextStart,
void ** mkextEnd,
uint32_t * mkextVersion);
CFArrayRef copyKextsFromMkext2(
void * mkextStart,
void * mkextEnd,
const NXArchInfo * archInfo);
Boolean writeMkext2EntriesToDirectory(
CFArrayRef kexts,
char * outputDirectory);
Boolean writeMkext2ToDirectory(
OSKextRef aKext,
const char * outputDirectory,
CFMutableSetRef kextNames);
CFDictionaryRef extractEntriesFromMkext1(
void * mkextStart,
void * mkextEnd);
Boolean uncompressMkext1Entry(
void * mkext_base_address,
mkext_file * entry_address,
CFDataRef * uncompressedEntry);
Boolean writeMkext1EntriesToDirectory(CFDictionaryRef entries,
char * outputDirectory);
CFStringRef createKextNameFromPlist(
CFDictionaryRef entries, CFDictionaryRef kextPlist);
int getBundleIDAndVersion(CFDictionaryRef kextPlist, unsigned index,
char ** bundle_id_out, char ** bundle_version_out);
Boolean writeFileInDirectory(
const char * basePath,
char * subPath,
const char * fileName,
const char * fileData,
size_t fileLength);
#if 0
/*******************************************************************************
* NOTES!
*******************************************************************************/
How to unpack all arches from an mkext:
Unpack each arch in a fat mkext to a separate array of kexts.
For each arch:
- Get kext plist
- Check {kext path, id, vers} against assembled kexts:
- Already have?
- Plist identical:
- "lipo" executable into assembled
- Add all resources IF NOT PRESENT (check for different?)
- Plist different:
- cannot handle, error; or save to separate path
- Else add kext to assembled list
- Need to save infoDict, executable, resources
#endif /* 0 */
/*******************************************************************************
*******************************************************************************/
void usage(int num) {
fprintf(stderr, "usage: %s [-v] [-a arch] [-d output_dir] mkextfile\n", progname);
fprintf(stderr, " -d output_dir: where to put kexts (must exist)\n");
fprintf(stderr, " -a arch: pick architecture from fat mkext file\n");
fprintf(stderr, " -v: verbose output; list kexts in mkextfile\n");
return;
}
/*******************************************************************************
*******************************************************************************/
int main (int argc, const char * argv[]) {
int exit_code = 0;
char optchar;
char * outputDirectory = NULL;
const char * mkextFile = NULL;
int mkextFileFD;
struct stat stat_buf;
uint8_t * mkextFileContents = NULL;
void * mkextStart = NULL;
void * mkextEnd = NULL;
CFDictionaryRef entries = NULL;
CFArrayRef oskexts = NULL;
const NXArchInfo * archInfo = NULL;
uint32_t mkextVersion;
progname = argv[0];
/* Set the OSKext log callback right away.
*/
OSKextSetLogOutputFunction(&tool_log);
while ((optchar = getopt(argc, (char * const *)argv, "a:d:hv")) != -1) {
switch (optchar) {
case 'd':
if (!optarg) {
fprintf(stderr, "no argument for -d\n");
usage(0);
exit_code = 1;
goto finish;
}
outputDirectory = optarg;
break;
case 'h':
usage(1);
exit_code = 0;
goto finish;
break;
case 'v':
gVerbose = true;
break;
case 'a':
if (archInfo != NULL) {
fprintf(stderr, "architecture already specified; replacing\n");
}
if (!optarg) {
fprintf(stderr, "no argument for -a\n");
usage(0);
exit_code = 1;
goto finish;
}
archInfo = NXGetArchInfoFromName(optarg);
if (!archInfo) {
fprintf(stderr, "architecture '%s' not found\n", optarg);
exit_code = 1;
goto finish;
}
break;
}
}
/* Update argc, argv based on option processing.
*/
argc -= optind;
argv += optind;
if (argc == 0 || argc > 1) {
usage(0);
exit_code = 1;
goto finish;
}
mkextFile = argv[0];
if (!outputDirectory && !gVerbose) {
fprintf(stderr, "no work to do; please specify -d or -v\n");
usage(0);
exit_code = 1;
goto finish;
}
if (!mkextFile) {
fprintf(stderr, "no mkext file given\n");
usage(0);
exit_code = 1;
goto finish;
}
if (outputDirectory) {
if (stat(outputDirectory, &stat_buf) < 0) {
fprintf(stderr, "can't stat directory %s\n",
outputDirectory);
exit_code = 1;
goto finish;
}
if ((stat_buf.st_mode & S_IFMT) != S_IFDIR) {
fprintf(stderr, "%s is not a directory\n",
outputDirectory);
exit_code = 1;
goto finish;
}
if (access(outputDirectory, W_OK) == -1) {
fprintf(stderr, "can't write into directory %s "
"(permission denied)\n", outputDirectory);
exit_code = 1;
goto finish;
}
}
if (stat(mkextFile, &stat_buf) < 0) {
fprintf(stderr, "can't stat file %s\n", mkextFile);
exit_code = 1;
goto finish;
}
if (access(mkextFile, R_OK) == -1) {
fprintf(stderr, "can't read file %s (permission denied)\n",
mkextFile);
exit_code = 1;
goto finish;
}
mkextFileFD = open(mkextFile, O_RDONLY, 0);
if (mkextFileFD < 0) {
fprintf(stderr, "can't open file %s\n", mkextFile);
exit_code = 1;
goto finish;
}
if ( !(stat_buf.st_mode & S_IFREG) ) {
fprintf(stderr, "%s is not a regular file\n",
mkextFile);
exit_code = 1;
goto finish;
}
if (!stat_buf.st_size) {
fprintf(stderr, "%s is an empty file\n",
mkextFile);
exit_code = 1;
goto finish;
}
mkextFileContents = mmap(0, (size_t)stat_buf.st_size, PROT_READ,
MAP_FILE|MAP_PRIVATE, mkextFileFD, 0);
if (mkextFileContents == (u_int8_t *)-1) {
fprintf(stderr, "can't map file %s\n", mkextFile);
exit_code = 1;
goto finish;
}
if (!getMkextDataForArch(mkextFileContents, (size_t)stat_buf.st_size,
archInfo, &mkextStart, &mkextEnd, &mkextVersion)) {
exit_code = 1;
goto finish;
}
if (mkextVersion == MKEXT_VERS_2) {
oskexts = copyKextsFromMkext2(mkextStart, mkextEnd, archInfo);
if (!oskexts) {
exit_code = 1;
goto finish;
}
if (outputDirectory &&
!writeMkext2EntriesToDirectory(oskexts, outputDirectory)) {
exit_code = 1;
goto finish;
}
} else if (mkextVersion == MKEXT_VERS_1) {
entries = extractEntriesFromMkext1(mkextStart, mkextEnd);
if (!entries) {
fprintf(stderr, "can't unpack file %s\n", mkextFile);
exit_code = 1;
goto finish;
}
if (outputDirectory &&
!writeMkext1EntriesToDirectory(entries, outputDirectory)) {
exit_code = 1;
goto finish;
}
}
finish:
SAFE_RELEASE(oskexts);
exit(exit_code);
return exit_code;
}
/*******************************************************************************
*******************************************************************************/
Boolean getMkextDataForArch(
u_int8_t * fileData,
size_t fileSize,
const NXArchInfo * archInfo,
void ** mkextStart,
void ** mkextEnd,
uint32_t * mkextVersion)
{
Boolean result = false;
uint32_t magic;
fat_iterator fatIterator = NULL; // must fat_iterator_close()
mkext_header * mkextHeader = NULL; // do not free
uint8_t * crc_address = NULL; // do not free
uint32_t checksum;
*mkextStart = *mkextEnd = NULL;
*mkextVersion = 0;
magic = MAGIC32(fileData);
if (ISFAT(magic)) {
if (!archInfo) {
archInfo = NXGetLocalArchInfo();
}
fatIterator = fat_iterator_for_data(fileData,
fileData + fileSize,
1 /* mach-o only */);
if (!fatIterator) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Can't read mkext fat header.");
goto finish;
}
*mkextStart = fat_iterator_find_arch(fatIterator,
archInfo->cputype, archInfo->cpusubtype, mkextEnd);
if (!*mkextStart) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Architecture %s not found in mkext.",
archInfo->name);
goto finish;
}
} else {
*mkextStart = fileData;
*mkextEnd = fileData + fileSize;
}
mkextHeader = (mkext_header *)*mkextStart;
if ((MKEXT_GET_MAGIC(mkextHeader) != MKEXT_MAGIC) ||
(MKEXT_GET_SIGNATURE(mkextHeader) != MKEXT_SIGN)) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Bad mkext magic/signature.");
goto finish;
}
if (MKEXT_GET_LENGTH(mkextHeader) !=
(*mkextEnd - *mkextStart)) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Mkext length field %d does not match mkext actual size %d.",
MKEXT_GET_LENGTH(mkextHeader),
(int)(*mkextEnd - *mkextStart));
goto finish;
}
if (archInfo && MKEXT_GET_CPUTYPE(mkextHeader) != archInfo->cputype) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Mkext cputype %d does not match requested type %d (%s).",
MKEXT_GET_CPUTYPE(mkextHeader),
archInfo->cputype,
archInfo->name);
goto finish;
}
crc_address = (uint8_t *)&mkextHeader->version;
checksum = local_adler32(crc_address,
(int32_t)((uintptr_t)mkextHeader +
MKEXT_GET_LENGTH(mkextHeader) - (uintptr_t)crc_address));
if (MKEXT_GET_CHECKSUM(mkextHeader) != checksum) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Mkext checksum error.");
goto finish;
}
*mkextVersion = MKEXT_GET_VERSION(mkextHeader);
result = true;
finish:
if (fatIterator) {
fat_iterator_close(fatIterator);
}
return result;
}
/*******************************************************************************
*******************************************************************************/
CFArrayRef copyKextsFromMkext2(
void * mkextStart,
void * mkextEnd,
const NXArchInfo * archInfo)
{
CFArrayRef result = NULL; // release on error
Boolean ok = false;
CFDataRef mkextDataObject = NULL; // must release
char kextPath[PATH_MAX];
char * kextIdentifier = NULL; // must free
char kextVersion[kOSKextVersionMaxLength];
if (!archInfo) {
archInfo = NXGetLocalArchInfo();
}
OSKextSetArchitecture(archInfo);
mkextDataObject = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault,
(UInt8 *)mkextStart, mkextEnd - mkextStart, NULL);
if (!mkextDataObject) {
OSKextLogMemError();
goto finish;
}
result = OSKextCreateKextsFromMkextData(kCFAllocatorDefault, mkextDataObject);
if (!result) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Can't read mkext2 archive.");
goto finish;
}
if (gVerbose) {
CFIndex count, i;
count = CFArrayGetCount(result);
fprintf(stdout, "Found %d kexts:\n", (int)count);
for (i = 0; i < count; i++) {
OSKextRef theKext = (OSKextRef)CFArrayGetValueAtIndex(result, i);
SAFE_FREE(kextIdentifier);
if (!CFURLGetFileSystemRepresentation(OSKextGetURL(theKext),
/* resolveToBase */ false, (UInt8 *)kextPath, sizeof(kextPath))) {
OSKextLogStringError(theKext);
goto finish;
}
kextIdentifier = createUTF8CStringForCFString(OSKextGetIdentifier(theKext));
OSKextVersionGetString(OSKextGetVersion(theKext), kextVersion,
sizeof(kextVersion));
fprintf(stdout, "%s - %s (%s)\n", kextPath, kextIdentifier,
kextVersion);
}
}
ok = true;
finish:
if (!ok) {
SAFE_RELEASE_NULL(result);
}
SAFE_RELEASE(mkextDataObject);
return result;
}
/*******************************************************************************
*******************************************************************************/
Boolean writeMkext2EntriesToDirectory(
CFArrayRef kexts,
char * outputDirectory)
{
Boolean result = false;
CFMutableSetRef kextNames = NULL; // must release
CFIndex count, i;
if (!createCFMutableSet(&kextNames, &kCFTypeSetCallBacks)) {
OSKextLogMemError();
}
count = CFArrayGetCount(kexts);
for (i = 0; i < count; i++) {
OSKextRef theKext = (OSKextRef)CFArrayGetValueAtIndex(kexts, i);
if (!writeMkext2ToDirectory(theKext, outputDirectory, kextNames)) {
goto finish;
}
}
finish:
return result;
}
/*******************************************************************************
*******************************************************************************/
Boolean writeMkext2ToDirectory(
OSKextRef aKext,
const char * outputDirectory,
CFMutableSetRef kextNames)
{
Boolean result = false;
CFDictionaryRef infoDict = NULL; // must release
CFDataRef infoDictData = NULL; // must release
CFErrorRef error = NULL; // must release
CFDataRef executable = NULL; // must release
CFURLRef kextURL = NULL; // do not release
CFStringRef kextName = NULL; // must release
CFStringRef executableName = NULL; // do not release
uint32_t pathLength;
char kextPath[PATH_MAX]; // gets trashed during use
char * kextNameCString = NULL; // do not free
char * kextNameSuffix = NULL; // do not free
char * kextNameCStringAlloced = NULL; // must free
char * executableNameCStringAlloced = NULL; // must free
const void * file_data = NULL; // do not free
char subPath[PATH_MAX];
CFIndex i;
infoDict = OSKextCopyInfoDictionary(aKext);
executable = OSKextCopyExecutableForArchitecture(aKext, NULL);
if (!infoDict) {
OSKextLogMemError();
goto finish;
}
kextURL = OSKextGetURL(aKext);
if (!CFURLGetFileSystemRepresentation(kextURL, /* resolveToBase */ true,
(UInt8 *)kextPath, sizeof(kextPath))) {
OSKextLogStringError(aKext);
goto finish;
}
pathLength = (uint32_t)strlen(kextPath);
if (pathLength && kextPath[pathLength-1] == '/') {
kextPath[pathLength-1] = '\0';
}
kextNameCString = rindex(kextPath, '/');
if (kextNameCString) {
kextNameCString++;
}
SAFE_RELEASE_NULL(kextName);
kextName = CFStringCreateWithCString(kCFAllocatorDefault,
kextNameCString, kCFStringEncodingUTF8);
if (!kextName) {
OSKextLogMemError();
goto finish;
}
/* Splat off the ".kext" suffix if needed so we can build
* numbered variants.
*/
if (CFSetContainsValue(kextNames, kextName)) {
kextNameSuffix = strstr(kextNameCString, ".kext");
if (!kextNameSuffix) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Bad mkext data; kext missing suffix.");
goto finish;
}
*kextNameSuffix = '\0'; // truncate at the period
}
i = 1;
while (CFSetContainsValue(kextNames, kextName)) {
SAFE_RELEASE_NULL(kextName);
kextName = CFStringCreateWithFormat(kCFAllocatorDefault,
/* formatOptions */ NULL, CFSTR("%s-%zd.kext"),
kextNameCString, i);
i++;
}
CFSetAddValue(kextNames, kextName);
kextNameCStringAlloced = createUTF8CStringForCFString(kextName);
/*****
* Write the plist file.
*/
infoDictData = CFPropertyListCreateData(kCFAllocatorDefault,
infoDict, kCFPropertyListXMLFormat_v1_0, /* options */ 0, &error);
if (!infoDictData) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Can't serialize kext info dictionary.");
goto finish;
}
file_data = (u_int8_t *)CFDataGetBytePtr(infoDictData);
if (!file_data) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Internal error; info dictionary has no data.");
goto finish;
}
if (snprintf(subPath, sizeof(subPath),
"%s/Contents", kextNameCStringAlloced) >= sizeof(subPath) - 1) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag | kOSKextLogFileAccessFlag,
"Output path is too long - %s.", subPath);
goto finish;
}
if (!writeFileInDirectory(outputDirectory, subPath, "Info.plist",
file_data, CFDataGetLength(infoDictData))) {
goto finish;
}
if (!executable) {
result = true;
goto finish;
}
/*****
* Write the executable file.
*/
file_data = (u_int8_t *)CFDataGetBytePtr(executable);
if (!file_data) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Internal error; executable has no data.");
goto finish;
}
if (snprintf(subPath, sizeof(subPath),
"%s/Contents/MacOS", kextNameCStringAlloced) >= sizeof(subPath) - 1) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag | kOSKextLogFileAccessFlag,
"Output path is too long - %s.", subPath);
goto finish;
}
executableName = CFDictionaryGetValue(infoDict, CFSTR("CFBundleExecutable"));
if (!executableName) {
OSKextLog(/* kext */ NULL,
kOSKextLogErrorLevel | kOSKextLogArchiveFlag,
"Kext %s has an executable but no CFBundleExecutable property.",
kextNameCStringAlloced);
goto finish;
}
executableNameCStringAlloced = createUTF8CStringForCFString(executableName);
if (!executableNameCStringAlloced) {
OSKextLogMemError();
goto finish;
}
if (!writeFileInDirectory(outputDirectory, subPath,
executableNameCStringAlloced,
file_data, CFDataGetLength(executable))) {
goto finish;
}
result = true;
finish:
SAFE_RELEASE(infoDict);
SAFE_RELEASE(infoDictData);
SAFE_RELEASE(error);
SAFE_RELEASE(executable);
SAFE_RELEASE(kextName);
SAFE_FREE(kextNameCStringAlloced);
SAFE_FREE(executableNameCStringAlloced);
return result;
}
/*******************************************************************************
*******************************************************************************/
static Boolean CaseInsensitiveEqual(CFTypeRef left, CFTypeRef right)
{
CFComparisonResult compResult;
compResult = CFStringCompare(left, right, kCFCompareCaseInsensitive);
if (compResult == kCFCompareEqualTo) {
return true;
}
return false;
}
/*******************************************************************************
*******************************************************************************/
static CFHashCode CaseInsensitiveHash(const void *key)
{
return (CFStringGetLength(key));
}
/*******************************************************************************
*******************************************************************************/
CFDictionaryRef extractEntriesFromMkext1(
void * mkextStart,
void * mkextEnd)
{
CFMutableDictionaryRef entries = NULL; // returned
Boolean error = false;
unsigned int i;
mkext1_header * mkextHeader = NULL; // don't free
mkext_kext * onekext_data = 0; // don't free
mkext_file * plist_file = 0; // don't free
mkext_file * module_file = 0; // don't free
CFStringRef entryName = NULL; // must release
CFMutableDictionaryRef entryDict = NULL; // must release
CFDataRef kextPlistDataObject = 0; // must release
CFDictionaryRef kextPlist = 0; // must release
CFStringRef errorString = NULL; // must release
CFDataRef kextExecutable = 0; // must release
CFDictionaryKeyCallBacks keyCallBacks;
keyCallBacks = kCFTypeDictionaryKeyCallBacks;
keyCallBacks.equal = &CaseInsensitiveEqual;
keyCallBacks.hash = &CaseInsensitiveHash;
entries = CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
&keyCallBacks,
&kCFTypeDictionaryValueCallBacks);
if (!entries) {
goto finish;
}
mkextHeader = (mkext1_header *)mkextStart;
if (gVerbose) {
fprintf(stdout, "Found %u kexts:\n", MKEXT_GET_COUNT(mkextHeader));
}
for (i = 0; i < MKEXT_GET_COUNT(mkextHeader); i++) {
if (entryName) {
CFRelease(entryName);
entryName = NULL;
}
if (entryDict) {
CFRelease(entryDict);
entryDict = NULL;
}
if (kextPlistDataObject) {
CFRelease(kextPlistDataObject);
kextPlistDataObject = NULL;
}
if (kextPlist) {
CFRelease(kextPlist);
kextPlist = NULL;
}
if (errorString) {
CFRelease(errorString);
errorString = NULL;
}
if (kextExecutable) {
CFRelease(kextExecutable);
kextExecutable = NULL;
}
entryDict = CFDictionaryCreateMutable(kCFAllocatorDefault, 0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
if (!entryDict) {
fprintf(stderr, "internal error.\n");
error = true;
goto finish;
}
onekext_data = &mkextHeader->kext[i];
plist_file = &onekext_data->plist;
module_file = &onekext_data->module;
/*****
* Get the plist
*/
if (!uncompressMkext1Entry(mkextStart,
plist_file, &kextPlistDataObject) || !kextPlistDataObject) {
fprintf(stderr, "couldn't uncompress plist at index %d.\n", i);
continue;
}
CFErrorRef error;
kextPlist = CFPropertyListCreateWithData(kCFAllocatorDefault,
kextPlistDataObject,
kCFPropertyListImmutable,
NULL,
&error);
if (!kextPlist) {
errorString = CFErrorCopyDescription(error);
CFRelease(error);
if (errorString) {
CFIndex bufsize = CFStringGetMaximumSizeForEncoding(
CFStringGetLength(errorString), kCFStringEncodingUTF8);
char * error_string = (char *)malloc((1+bufsize) * sizeof(char));
if (!error_string) {
fprintf(stderr, "memory allocation failure\n");
error = true;
goto finish;
}
if (CFStringGetCString(errorString, error_string,
bufsize, kCFStringEncodingUTF8)) {
fprintf(stderr, "error reading plist: %s",
error_string);
}
free(error_string);
} else {
fprintf(stderr, "error reading plist");
}
goto finish;
}
entryName = createKextNameFromPlist(entries, kextPlist);
if (!entryName) {
fprintf(stderr, "internal error.\n");
error = true;
goto finish;
}
CFDictionarySetValue(entryDict, CFSTR("plistData"), kextPlistDataObject);
CFDictionarySetValue(entryDict, CFSTR("plist"), kextPlist);
if (gVerbose) {
char kext_name[PATH_MAX];
char * bundle_id = NULL; // don't free
char * bundle_vers = NULL; // don't free
if (!CFStringGetCString(entryName, kext_name, sizeof(kext_name) - 1,
kCFStringEncodingUTF8)) {
fprintf(stderr, "memory or string conversion error\n");
} else {
switch (getBundleIDAndVersion(kextPlist, i, &bundle_id,
&bundle_vers)) {
case 1:
fprintf(stdout, "%s - %s (%s)\n", kext_name, bundle_id,
bundle_vers);
break;
case 0:
continue;
case -1:
default:
error = true;
goto finish;
break;
}
}
}
/*****
* Get the executable
*/
if (OSSwapBigToHostInt32(module_file->offset) ||
OSSwapBigToHostInt32(module_file->compsize) ||
OSSwapBigToHostInt32(module_file->realsize) ||
OSSwapBigToHostInt32(module_file->modifiedsecs)) {
if (!uncompressMkext1Entry(mkextStart,
module_file, &kextExecutable)) {
fprintf(stderr, "couldn't uncompress executable at index %d.\n",
i);
continue;
}
if (kextExecutable) {
CFDictionarySetValue(entryDict, CFSTR("executable"),
kextExecutable);
}
}
CFDictionarySetValue(entries, entryName, entryDict);
}
finish:
if (error) {
if (entries) {
CFRelease(entries);
entries = NULL;
}
}
if (entryName) CFRelease(entryName);
if (entryDict) CFRelease(entryDict);
if (kextPlistDataObject) CFRelease(kextPlistDataObject);
if (kextPlist) CFRelease(kextPlist);
if (errorString) CFRelease(errorString);
if (kextExecutable) CFRelease(kextExecutable);
return entries;
}
/*******************************************************************************
*******************************************************************************/
Boolean uncompressMkext1Entry(
void * mkext_base_address,
mkext_file * entry_address,
CFDataRef * uncompressedEntry)
{
Boolean result = true;
u_int8_t * uncompressed_data = NULL; // must free
CFDataRef uncompressedData = NULL; // returned
size_t uncompressed_size = 0;
size_t offset = OSSwapBigToHostInt32(entry_address->offset);
size_t compsize = OSSwapBigToHostInt32(entry_address->compsize);
size_t realsize = OSSwapBigToHostInt32(entry_address->realsize);
time_t modifiedsecs = OSSwapBigToHostInt32(entry_address->modifiedsecs);
*uncompressedEntry = NULL;
/* If realsize is 0 there is nothing to uncompress or if any of the other
* three fields are 0, but that isn't an error.
*/
if (realsize == 0 ||
(offset == 0 && compsize == 0 && modifiedsecs == 0)) {
goto finish;
}
uncompressed_data = malloc(realsize);
if (!uncompressed_data) {
fprintf(stderr, "malloc failure\n");
result = false;
goto finish;
}
if (compsize != 0) {
uncompressed_size = decompress_lzss(uncompressed_data,
(u_int32_t)realsize,
mkext_base_address + offset,
(u_int32_t)compsize);
if (uncompressed_size != realsize) {
fprintf(stderr, "uncompressed file is not the length "
"recorded.\n");
result = false;
goto finish;
}
} else {
bcopy(mkext_base_address + offset, uncompressed_data,
realsize);
}
uncompressedData = CFDataCreate(kCFAllocatorDefault,
(const UInt8 *)uncompressed_data, realsize);
if (!uncompressedData) {
fprintf(stderr, "malloc failure\n");
result = false;
goto finish;
}
*uncompressedEntry = uncompressedData;
finish:
if (uncompressed_data) free(uncompressed_data);
return result;
}
/*******************************************************************************
*******************************************************************************/
Boolean writeMkext1EntriesToDirectory(CFDictionaryRef entryDict,
char * outputDirectory)
{
Boolean result = false;
CFStringRef * kextNames = NULL; // must free
CFDictionaryRef * entries = NULL; // must free
char * kext_name = NULL; // must free
char * executable_name = NULL; // must free
char subPath[PATH_MAX];
unsigned int count, i;
count = (unsigned int)CFDictionaryGetCount(entryDict);
kextNames = (CFStringRef *)malloc(count * sizeof(CFStringRef));
entries = (CFDictionaryRef *)malloc(count * sizeof(CFDictionaryRef));
if (!kextNames || !entries) {
fprintf(stderr, "malloc failure\n");
result = false;
goto finish;
}
CFDictionaryGetKeysAndValues(entryDict, (const void **)kextNames,
(const void **)entries);
for (i = 0; i < count; i++) {
CFStringRef kextName = kextNames[i];
CFDictionaryRef kextEntry = entries[i];
CFStringRef executableName = NULL; // do not release
CFDataRef fileData = NULL; // do not release
CFDictionaryRef plist;
const void * file_data = NULL;