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Diffstat (limited to 'engines/kyra/resource.cpp')
-rw-r--r--engines/kyra/resource.cpp69
1 files changed, 41 insertions, 28 deletions
diff --git a/engines/kyra/resource.cpp b/engines/kyra/resource.cpp
index 9b3ccebb25..569a4cf036 100644
--- a/engines/kyra/resource.cpp
+++ b/engines/kyra/resource.cpp
@@ -51,9 +51,8 @@ Resource::Resource(KyraEngine *engine) {
return;
// only VRM file we need in the *whole* game for kyra1
- if (_engine->gameFlags().isTalkie) {
+ if (_engine->gameFlags().isTalkie)
loadPakFile("CHAPTER1.VRM");
- }
} else if (_engine->game() == GI_KYRA3) {
// load the installation package file for kyra3
INSFile *insFile = new INSFile("WESTWOOD.001");
@@ -66,9 +65,8 @@ Resource::Resource(KyraEngine *engine) {
FSList fslist;
FilesystemNode dir(ConfMan.get("path"));
- if (!dir.listDir(fslist, FilesystemNode::kListFilesOnly)) {
+ if (!dir.listDir(fslist, FilesystemNode::kListFilesOnly))
error("invalid game path '%s'", dir.path().c_str());
- }
if (_engine->game() == GI_KYRA1 && _engine->gameFlags().isTalkie) {
static const char *list[] = {
@@ -125,6 +123,7 @@ Resource::~Resource() {
bool Resource::loadPakFile(const Common::String &filename, const bool forcePC) {
Common::List<ResourceFile*>::iterator start = _pakfiles.begin();
uint hash = Common::hashit_lower(filename.c_str());
+
for (;start != _pakfiles.end(); ++start) {
if ((*start)->filename() == hash) {
(*start)->open();
@@ -140,13 +139,12 @@ bool Resource::loadPakFile(const Common::String &filename, const bool forcePC) {
return false;
}
- PAKFile *file = 0;
-
- file = new PAKFile(filename.c_str(), handle.name(), handle, (_engine->gameFlags().platform == Common::kPlatformAmiga) && !forcePC);
+ PAKFile *file = new PAKFile(filename.c_str(), handle.name(), handle, (_engine->gameFlags().platform == Common::kPlatformAmiga) && !forcePC);
handle.close();
if (!file)
return false;
+
if (!file->isValid()) {
warning("'%s' is no valid pak file", filename.c_str());
delete file;
@@ -239,9 +237,8 @@ bool Resource::getFileHandle(const char *file, uint32 *size, Common::File &fileh
if (!(*size))
continue;
- if ((*start)->getFileHandle(fileHash, filehandle)) {
+ if ((*start)->getFileHandle(fileHash, filehandle))
return true;
- }
}
return false;
@@ -271,6 +268,7 @@ uint32 Resource::getFileSize(const char *file) {
bool Resource::loadFileToBuf(const char *file, void *buf, uint32 maxSize) {
Common::File tempHandle;
uint32 size = 0;
+
if (!getFileHandle(file, &size, tempHandle))
return false;
@@ -287,8 +285,6 @@ bool Resource::loadFileToBuf(const char *file, void *buf, uint32 maxSize) {
// Pak file manager
#define PAKFile_Iterate Common::List<PakChunk>::iterator start=_files.begin();start != _files.end(); ++start
PAKFile::PAKFile(const char *file, const char *physfile, Common::File &pakfile, bool isAmiga) : ResourceFile() {
- _isAmiga = isAmiga;
-
_open = false;
if (!pakfile.isOpen()) {
@@ -299,14 +295,18 @@ PAKFile::PAKFile(const char *file, const char *physfile, Common::File &pakfile,
uint32 off = pakfile.pos();
uint32 filesize = pakfile.size();
- // works with the file
uint32 pos = 0, startoffset = 0, endoffset = 0;
- if (!_isAmiga) {
+ if (!isAmiga)
startoffset = pakfile.readUint32LE();
- } else {
+ else
startoffset = pakfile.readUint32BE();
+
+ if (startoffset > filesize) {
+ warning("PAK file '%s' is corrupted", file);
+ return;
}
+
pos += 4;
while (pos < filesize) {
@@ -318,7 +318,10 @@ PAKFile::PAKFile(const char *file, const char *physfile, Common::File &pakfile,
pakfile.seek(pos);
// Read in the header
- pakfile.read(&buffer, 64);
+ if (pakfile.read(&buffer, 64) < 5) {
+ warning("PAK file '%s' is corrupted", file);
+ return;
+ }
// Quit now if we encounter an empty string
if (!(*((const char*)buffer)))
@@ -327,20 +330,29 @@ PAKFile::PAKFile(const char *file, const char *physfile, Common::File &pakfile,
chunk._name = Common::hashit_lower((const char*)buffer);
nameLength = strlen((const char*)buffer) + 1;
- if (!_isAmiga) {
+ if (nameLength > 60) {
+ warning("PAK file '%s' is corrupted", file);
+ return;
+ }
+
+ if (!isAmiga)
endoffset = READ_LE_UINT32(buffer + nameLength);
- } else {
+ else
endoffset = READ_BE_UINT32(buffer + nameLength);
- }
- if (endoffset == 0) {
+ if (!endoffset) {
endoffset = filesize;
+ } else if (endoffset > filesize || startoffset > endoffset) {
+ warning("PAK file '%s' is corrupted", file);
+ return;
}
- chunk._start = startoffset;
- chunk._size = endoffset - startoffset;
+ if (startoffset != endoffset) {
+ chunk._start = startoffset;
+ chunk._size = endoffset - startoffset;
- _files.push_back(chunk);
+ _files.push_back(chunk);
+ }
if (endoffset == filesize)
break;
@@ -369,6 +381,7 @@ uint8 *PAKFile::getFile(uint hash) {
Common::File pakfile;
if (!openFile(pakfile))
return false;
+
pakfile.seek(start->_start, SEEK_CUR);
uint8 *buffer = new uint8[start->_size];
assert(buffer);
@@ -386,6 +399,7 @@ bool PAKFile::getFileHandle(uint hash, Common::File &filehandle) {
if (start->_name == hash) {
if (!openFile(filehandle))
return false;
+
filehandle.seek(start->_start, SEEK_CUR);
return true;
}
@@ -404,9 +418,8 @@ uint32 PAKFile::getFileSize(uint hash) {
bool PAKFile::openFile(Common::File &filehandle) {
filehandle.close();
- if (!filehandle.open(_physfile)) {
+ if (!filehandle.open(_physfile))
return false;
- }
filehandle.seek(_physOffset, SEEK_CUR);
return true;
@@ -481,9 +494,9 @@ uint8 *INSFile::getFile(uint hash) {
for (INSFile_Iterate) {
if (start->_name == hash) {
Common::File pakfile;
- if (!pakfile.open(_physfile)) {
+ if (!pakfile.open(_physfile))
return false;
- }
+
pakfile.seek(start->_start);
uint8 *buffer = new uint8[start->_size];
assert(buffer);
@@ -497,9 +510,9 @@ uint8 *INSFile::getFile(uint hash) {
bool INSFile::getFileHandle(uint hash, Common::File &filehandle) {
for (INSFile_Iterate) {
if (start->_name == hash) {
- if (!filehandle.open(_physfile)) {
+ if (!filehandle.open(_physfile))
return false;
- }
+
filehandle.seek(start->_start, SEEK_CUR);
return true;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 08:45:35 +0000