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Do not expand file path since its not necessary for glTF asset path(U…
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…RI) and for security reason(`wordexp`).
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@syoyo
syoyo committed Aug 16, 2022
1 parent 544969b commit 52ff00a
Showing 1 changed file with 44 additions and 20 deletions.
64 changes: 44 additions & 20 deletions tiny_gltf.h
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Expand Up @@ -26,6 +26,7 @@
// THE SOFTWARE.

// Version:
// - v2.6.0 Disable expanding file path for security(no use of awkward `wordexp` anymore).
// - v2.5.0 Add SetPreserveImageChannels() option to load image data as is.
// - v2.4.3 Fix null object output when when material has all default
// parameters.
Expand Down Expand Up @@ -108,7 +109,11 @@ namespace tinygltf {
#define TINYGLTF_COMPONENT_TYPE_INT (5124)
#define TINYGLTF_COMPONENT_TYPE_UNSIGNED_INT (5125)
#define TINYGLTF_COMPONENT_TYPE_FLOAT (5126)
#define TINYGLTF_COMPONENT_TYPE_DOUBLE (5130) // OpenGL double type. Note that some of glTF 2.0 validator does not support double type even the schema seems allow any value of integer: https://github.com/KhronosGroup/glTF/blob/b9884a2fd45130b4d673dd6c8a706ee21ee5c5f7/specification/2.0/schema/accessor.schema.json#L22
#define TINYGLTF_COMPONENT_TYPE_DOUBLE \
(5130) // OpenGL double type. Note that some of glTF 2.0 validator does not
// support double type even the schema seems allow any value of
// integer:
// https://github.com/KhronosGroup/glTF/blob/b9884a2fd45130b4d673dd6c8a706ee21ee5c5f7/specification/2.0/schema/accessor.schema.json#L22

#define TINYGLTF_TEXTURE_FILTER_NEAREST (9728)
#define TINYGLTF_TEXTURE_FILTER_LINEAR (9729)
Expand Down Expand Up @@ -613,7 +618,8 @@ struct Sampler {
int wrapT =
TINYGLTF_TEXTURE_WRAP_REPEAT; // ["CLAMP_TO_EDGE", "MIRRORED_REPEAT",
// "REPEAT"], default "REPEAT"
//int wrapR = TINYGLTF_TEXTURE_WRAP_REPEAT; // TinyGLTF extension. currently not used.
// int wrapR = TINYGLTF_TEXTURE_WRAP_REPEAT; // TinyGLTF extension. currently
// not used.

Value extras;
ExtensionMap extensions;
Expand Down Expand Up @@ -1302,8 +1308,10 @@ class TinyGLTF {
///
/// Loads glTF ASCII asset from string(memory).
/// `length` = strlen(str);
/// Set warning message to `warn` for example it fails to load asserts.
/// Returns false and set error string to `err` if there's an error.
/// `base_dir` is a search path of glTF asset(e.g. images). Path Must be an
/// expanded path (e.g. no tilde(`~`), no environment variables). Set warning
/// message to `warn` for example it fails to load asserts. Returns false and
/// set error string to `err` if there's an error.
///
bool LoadASCIIFromString(Model *model, std::string *err, std::string *warn,
const char *str, const unsigned int length,
Expand All @@ -1322,6 +1330,8 @@ class TinyGLTF {
///
/// Loads glTF binary asset from memory.
/// `length` = strlen(str);
/// `base_dir` is a search path of glTF asset(e.g. images). Path Must be an
/// expanded path (e.g. no tilde(`~`), no environment variables).
/// Set warning message to `warn` for example it fails to load asserts.
/// Returns false and set error string to `err` if there's an error.
///
Expand Down Expand Up @@ -1605,7 +1615,7 @@ class TinyGLTF {
#endif

#elif !defined(__ANDROID__) && !defined(__OpenBSD__)
#include <wordexp.h>
//#include <wordexp.h>
#endif

#if defined(__sparcv9) || defined(__powerpc__)
Expand Down Expand Up @@ -1933,10 +1943,9 @@ bool Sampler::operator==(const Sampler &other) const {
return this->extensions == other.extensions && this->extras == other.extras &&
this->magFilter == other.magFilter &&
this->minFilter == other.minFilter && this->name == other.name &&
this->wrapS == other.wrapS &&
this->wrapT == other.wrapT;
this->wrapS == other.wrapS && this->wrapT == other.wrapT;

//this->wrapR == other.wrapR
// this->wrapR == other.wrapR
}
bool Scene::operator==(const Scene &other) const {
return this->extensions == other.extensions && this->extras == other.extras &&
Expand Down Expand Up @@ -2042,8 +2051,7 @@ static std::string GetBaseDir(const std::string &filepath) {

static std::string GetBaseFilename(const std::string &filepath) {
auto idx = filepath.find_last_of("/\\");
if (idx != std::string::npos)
return filepath.substr(idx + 1);
if (idx != std::string::npos) return filepath.substr(idx + 1);
return filepath;
}

Expand Down Expand Up @@ -2605,6 +2613,18 @@ bool FileExists(const std::string &abs_filename, void *) {
}

std::string ExpandFilePath(const std::string &filepath, void *) {
// https://github.com/syoyo/tinygltf/issues/368
//
// No file path expansion in built-in FS function anymore, since glTF URI
// should not contain tilde('~') and environment variables, and for security
// reason(`wordexp`).
//
// Users need to supply `base_dir`(in `LoadASCIIFromString`,
// `LoadBinaryFromMemory`) in expanded absolute path.

return filepath;

#if 0
#ifdef _WIN32
// Assume input `filepath` is encoded in UTF-8
std::wstring wfilepath = UTF8ToWchar(filepath);
Expand Down Expand Up @@ -2652,6 +2672,7 @@ std::string ExpandFilePath(const std::string &filepath, void *) {

return s;
#endif
#endif
}

bool ReadWholeFile(std::vector<unsigned char> *out, std::string *err,
Expand Down Expand Up @@ -4242,20 +4263,20 @@ static bool ParseSparseAccessor(Accessor *accessor, std::string *err,
const json &values_obj = GetValue(values_iterator);

int indices_buffer_view = 0, indices_byte_offset = 0, component_type = 0;
if (!ParseIntegerProperty(&indices_buffer_view, err, indices_obj, "bufferView",
true, "SparseAccessor")) {
if (!ParseIntegerProperty(&indices_buffer_view, err, indices_obj,
"bufferView", true, "SparseAccessor")) {
return false;
}
ParseIntegerProperty(&indices_byte_offset, err, indices_obj, "byteOffset",
false);
if (!ParseIntegerProperty(&component_type, err, indices_obj, "componentType",
true, "SparseAccessor")) {
true, "SparseAccessor")) {
return false;
}

int values_buffer_view = 0, values_byte_offset = 0;
if (!ParseIntegerProperty(&values_buffer_view, err, values_obj, "bufferView",
true, "SparseAccessor")) {
true, "SparseAccessor")) {
return false;
}
ParseIntegerProperty(&values_byte_offset, err, values_obj, "byteOffset",
Expand Down Expand Up @@ -5094,12 +5115,13 @@ static bool ParseSampler(Sampler *sampler, std::string *err, const json &o,
int magFilter = -1;
int wrapS = TINYGLTF_TEXTURE_WRAP_REPEAT;
int wrapT = TINYGLTF_TEXTURE_WRAP_REPEAT;
//int wrapR = TINYGLTF_TEXTURE_WRAP_REPEAT;
// int wrapR = TINYGLTF_TEXTURE_WRAP_REPEAT;
ParseIntegerProperty(&minFilter, err, o, "minFilter", false);
ParseIntegerProperty(&magFilter, err, o, "magFilter", false);
ParseIntegerProperty(&wrapS, err, o, "wrapS", false);
ParseIntegerProperty(&wrapT, err, o, "wrapT", false);
//ParseIntegerProperty(&wrapR, err, o, "wrapR", false); // tinygltf extension
// ParseIntegerProperty(&wrapR, err, o, "wrapR", false); // tinygltf
// extension

// TODO(syoyo): Check the value is alloed one.
// (e.g. we allow 9728(NEAREST), but don't allow 9727)
Expand All @@ -5108,7 +5130,7 @@ static bool ParseSampler(Sampler *sampler, std::string *err, const json &o,
sampler->magFilter = magFilter;
sampler->wrapS = wrapS;
sampler->wrapT = wrapT;
//sampler->wrapR = wrapR;
// sampler->wrapR = wrapR;

ParseExtensionsProperty(&(sampler->extensions), err, o);
ParseExtrasProperty(&(sampler->extras), o);
Expand Down Expand Up @@ -7171,7 +7193,7 @@ static void SerializeGltfSampler(Sampler &sampler, json &o) {
if (sampler.minFilter != -1) {
SerializeNumberProperty("minFilter", sampler.minFilter, o);
}
//SerializeNumberProperty("wrapR", sampler.wrapR, o);
// SerializeNumberProperty("wrapR", sampler.wrapR, o);
SerializeNumberProperty("wrapS", sampler.wrapS, o);
SerializeNumberProperty("wrapT", sampler.wrapT, o);

Expand Down Expand Up @@ -7534,8 +7556,10 @@ static void WriteBinaryGltfStream(std::ostream &stream,
const uint32_t content_size = uint32_t(content.size());
const uint32_t binBuffer_size = uint32_t(binBuffer.size());
// determine number of padding bytes required to ensure 4 byte alignment
const uint32_t content_padding_size = content_size % 4 == 0 ? 0 : 4 - content_size % 4;
const uint32_t bin_padding_size = binBuffer_size % 4 == 0 ? 0 : 4 - binBuffer_size % 4;
const uint32_t content_padding_size =
content_size % 4 == 0 ? 0 : 4 - content_size % 4;
const uint32_t bin_padding_size =
binBuffer_size % 4 == 0 ? 0 : 4 - binBuffer_size % 4;

// 12 bytes for header, JSON content length, 8 bytes for JSON chunk info.
// Chunk data must be located at 4-byte boundary, which may require padding
Expand Down

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