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// Copyright 2015 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "testing/test_support.h"
#include <stdio.h>
#include <string.h>
#include "core/fdrm/crypto/fx_crypt.h"
#include "core/fxcrt/fx_memory.h"
#include "core/fxcrt/fx_string.h"
#include "testing/utils/path_service.h"
#ifdef PDF_ENABLE_V8
#include "v8/include/libplatform/libplatform.h"
#include "v8/include/v8.h"
#endif
namespace {
#ifdef PDF_ENABLE_V8
#ifdef V8_USE_EXTERNAL_STARTUP_DATA
// Returns the full path for an external V8 data file based on either
// the currect exectuable path or an explicit override.
std::string GetFullPathForSnapshotFile(const std::string& exe_path,
const std::string& bin_dir,
const std::string& filename) {
std::string result;
if (!bin_dir.empty()) {
result = bin_dir;
if (*bin_dir.rbegin() != PATH_SEPARATOR) {
result += PATH_SEPARATOR;
}
} else if (!exe_path.empty()) {
size_t last_separator = exe_path.rfind(PATH_SEPARATOR);
if (last_separator != std::string::npos) {
result = exe_path.substr(0, last_separator + 1);
}
}
result += filename;
return result;
}
bool GetExternalData(const std::string& exe_path,
const std::string& bin_dir,
const std::string& filename,
v8::StartupData* result_data) {
std::string full_path =
GetFullPathForSnapshotFile(exe_path, bin_dir, filename);
size_t data_length = 0;
std::unique_ptr<char, pdfium::FreeDeleter> data_buffer =
GetFileContents(full_path.c_str(), &data_length);
if (!data_buffer)
return false;
result_data->data = data_buffer.release();
result_data->raw_size = data_length;
return true;
}
#endif // V8_USE_EXTERNAL_STARTUP_DATA
std::unique_ptr<v8::Platform> InitializeV8Common(const char* exe_path) {
v8::V8::InitializeICUDefaultLocation(exe_path);
std::unique_ptr<v8::Platform> platform = v8::platform::NewDefaultPlatform();
v8::V8::InitializePlatform(platform.get());
// By enabling predictable mode, V8 won't post any background tasks.
// By enabling GC, it makes it easier to chase use-after-free.
const char v8_flags[] = "--predictable --expose-gc";
v8::V8::SetFlagsFromString(v8_flags, static_cast<int>(strlen(v8_flags)));
v8::V8::Initialize();
return platform;
}
#endif // PDF_ENABLE_V8
} // namespace
std::unique_ptr<char, pdfium::FreeDeleter> GetFileContents(const char* filename,
size_t* retlen) {
FILE* file = fopen(filename, "rb");
if (!file) {
fprintf(stderr, "Failed to open: %s\n", filename);
return nullptr;
}
(void)fseek(file, 0, SEEK_END);
size_t file_length = ftell(file);
if (!file_length) {
return nullptr;
}
(void)fseek(file, 0, SEEK_SET);
std::unique_ptr<char, pdfium::FreeDeleter> buffer(
static_cast<char*>(malloc(file_length)));
if (!buffer) {
return nullptr;
}
size_t bytes_read = fread(buffer.get(), 1, file_length, file);
(void)fclose(file);
if (bytes_read != file_length) {
fprintf(stderr, "Failed to read: %s\n", filename);
return nullptr;
}
*retlen = bytes_read;
return buffer;
}
std::string GetPlatformString(FPDF_WIDESTRING wstr) {
WideString wide_string =
WideString::FromUTF16LE(wstr, WideString::WStringLength(wstr));
return std::string(wide_string.UTF8Encode().c_str());
}
std::wstring GetPlatformWString(FPDF_WIDESTRING wstr) {
if (!wstr)
return nullptr;
size_t characters = 0;
while (wstr[characters])
++characters;
std::wstring platform_string(characters, L'\0');
for (size_t i = 0; i < characters + 1; ++i) {
const unsigned char* ptr = reinterpret_cast<const unsigned char*>(&wstr[i]);
platform_string[i] = ptr[0] + 256 * ptr[1];
}
return platform_string;
}
std::vector<std::string> StringSplit(const std::string& str, char delimiter) {
std::vector<std::string> result;
size_t pos = 0;
while (1) {
size_t found = str.find(delimiter, pos);
if (found == std::string::npos)
break;
result.push_back(str.substr(pos, found - pos));
pos = found + 1;
}
result.push_back(str.substr(pos));
return result;
}
std::unique_ptr<unsigned short, pdfium::FreeDeleter> GetFPDFWideString(
const std::wstring& wstr) {
size_t length = sizeof(uint16_t) * (wstr.length() + 1);
std::unique_ptr<unsigned short, pdfium::FreeDeleter> result(
static_cast<unsigned short*>(malloc(length)));
char* ptr = reinterpret_cast<char*>(result.get());
size_t i = 0;
for (wchar_t w : wstr) {
ptr[i++] = w & 0xff;
ptr[i++] = (w >> 8) & 0xff;
}
ptr[i++] = 0;
ptr[i] = 0;
return result;
}
std::string CryptToBase16(const uint8_t* digest) {
static char const zEncode[] = "0123456789abcdef";
std::string ret;
ret.resize(32);
for (int i = 0, j = 0; i < 16; i++, j += 2) {
uint8_t a = digest[i];
ret[j] = zEncode[(a >> 4) & 0xf];
ret[j + 1] = zEncode[a & 0xf];
}
return ret;
}
std::string GenerateMD5Base16(const uint8_t* data, uint32_t size) {
uint8_t digest[16];
CRYPT_MD5Generate(data, size, digest);
return CryptToBase16(digest);
}
#ifdef PDF_ENABLE_V8
#ifdef V8_USE_EXTERNAL_STARTUP_DATA
std::unique_ptr<v8::Platform> InitializeV8ForPDFium(
const std::string& exe_path,
const std::string& bin_dir,
v8::StartupData* natives_blob,
v8::StartupData* snapshot_blob) {
std::unique_ptr<v8::Platform> platform = InitializeV8Common(exe_path.c_str());
if (natives_blob && snapshot_blob) {
if (!GetExternalData(exe_path, bin_dir, "natives_blob.bin", natives_blob))
return nullptr;
if (!GetExternalData(exe_path, bin_dir, "snapshot_blob.bin", snapshot_blob))
return nullptr;
v8::V8::SetNativesDataBlob(natives_blob);
v8::V8::SetSnapshotDataBlob(snapshot_blob);
}
return platform;
}
#else // V8_USE_EXTERNAL_STARTUP_DATA
std::unique_ptr<v8::Platform> InitializeV8ForPDFium(
const std::string& exe_path,
std::unique_ptr<v8::Platform>* platform) {
std::unique_ptr<v8::Platform> platform =
InitializeV8Common(exe_path.c_str(), platform);
return platform;
}
#endif // V8_USE_EXTERNAL_STARTUP_DATA
#endif // PDF_ENABLE_V8
TestLoader::TestLoader(const char* pBuf, size_t len)
: m_pBuf(pBuf), m_Len(len) {
}
// static
int TestLoader::GetBlock(void* param,
unsigned long pos,
unsigned char* pBuf,
unsigned long size) {
TestLoader* pLoader = static_cast<TestLoader*>(param);
if (pos + size < pos || pos + size > pLoader->m_Len)
return 0;
memcpy(pBuf, pLoader->m_pBuf + pos, size);
return 1;
}
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