1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
// 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 std::string& exe_path) {
v8::V8::InitializeICUDefaultLocation(exe_path.c_str());
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> InitializeV8ForPDFiumWithStartupData(
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);
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) {
return InitializeV8Common(exe_path);
}
#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;
}
|
