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-rw-r--r--core/fpdfapi/parser/cpdf_syntax_parser.cpp48
-rw-r--r--core/fpdfapi/parser/cpdf_syntax_parser.h22
2 files changed, 63 insertions, 7 deletions
diff --git a/core/fpdfapi/parser/cpdf_syntax_parser.cpp b/core/fpdfapi/parser/cpdf_syntax_parser.cpp
index 5fa3372d50..979ccad712 100644
--- a/core/fpdfapi/parser/cpdf_syntax_parser.cpp
+++ b/core/fpdfapi/parser/cpdf_syntax_parser.cpp
@@ -19,6 +19,7 @@
#include "core/fpdfapi/parser/cpdf_name.h"
#include "core/fpdfapi/parser/cpdf_null.h"
#include "core/fpdfapi/parser/cpdf_number.h"
+#include "core/fpdfapi/parser/cpdf_read_validator.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/cpdf_string.h"
@@ -358,8 +359,11 @@ void CPDF_SyntaxParser::ToNextWord() {
}
CFX_ByteString CPDF_SyntaxParser::GetNextWord(bool* bIsNumber) {
+ const CPDF_ReadValidator::Session read_session(GetValidator().Get());
GetNextWordInternal(bIsNumber);
- return CFX_ByteString((const char*)m_WordBuffer, m_WordSize);
+ return GetValidator()->has_read_problems()
+ ? CFX_ByteString()
+ : CFX_ByteString((const char*)m_WordBuffer, m_WordSize);
}
CFX_ByteString CPDF_SyntaxParser::GetKeyword() {
@@ -371,6 +375,18 @@ std::unique_ptr<CPDF_Object> CPDF_SyntaxParser::GetObject(
uint32_t objnum,
uint32_t gennum,
bool bDecrypt) {
+ const CPDF_ReadValidator::Session read_session(GetValidator().Get());
+ auto result = GetObjectInternal(pObjList, objnum, gennum, bDecrypt);
+ if (GetValidator()->has_read_problems())
+ return nullptr;
+ return result;
+}
+
+std::unique_ptr<CPDF_Object> CPDF_SyntaxParser::GetObjectInternal(
+ CPDF_IndirectObjectHolder* pObjList,
+ uint32_t objnum,
+ uint32_t gennum,
+ bool bDecrypt) {
CFX_AutoRestorer<int> restorer(&s_CurrentRecursionDepth);
if (++s_CurrentRecursionDepth > kParserMaxRecursionDepth)
return nullptr;
@@ -492,6 +508,17 @@ std::unique_ptr<CPDF_Object> CPDF_SyntaxParser::GetObjectForStrict(
CPDF_IndirectObjectHolder* pObjList,
uint32_t objnum,
uint32_t gennum) {
+ const CPDF_ReadValidator::Session read_session(GetValidator().Get());
+ auto result = GetObjectForStrictInternal(pObjList, objnum, gennum);
+ if (GetValidator()->has_read_problems())
+ return nullptr;
+ return result;
+}
+
+std::unique_ptr<CPDF_Object> CPDF_SyntaxParser::GetObjectForStrictInternal(
+ CPDF_IndirectObjectHolder* pObjList,
+ uint32_t objnum,
+ uint32_t gennum) {
CFX_AutoRestorer<int> restorer(&s_CurrentRecursionDepth);
if (++s_CurrentRecursionDepth > kParserMaxRecursionDepth)
return nullptr;
@@ -765,16 +792,25 @@ std::unique_ptr<CPDF_Stream> CPDF_SyntaxParser::ReadStream(
void CPDF_SyntaxParser::InitParser(
const CFX_RetainPtr<IFX_SeekableReadStream>& pFileAccess,
uint32_t HeaderOffset) {
- FX_Free(m_pFileBuf);
+ ASSERT(pFileAccess);
+ return InitParserWithValidator(
+ pdfium::MakeRetain<CPDF_ReadValidator>(pFileAccess, nullptr),
+ HeaderOffset);
+}
+void CPDF_SyntaxParser::InitParserWithValidator(
+ const CFX_RetainPtr<CPDF_ReadValidator>& validator,
+ uint32_t HeaderOffset) {
+ ASSERT(validator);
+ FX_Free(m_pFileBuf);
m_pFileBuf = FX_Alloc(uint8_t, m_BufSize);
m_HeaderOffset = HeaderOffset;
- m_FileLen = pFileAccess->GetSize();
+ m_FileLen = validator->GetSize();
m_Pos = 0;
- m_pFileAccess = pFileAccess;
+ m_pFileAccess = validator;
m_BufOffset = 0;
- pFileAccess->ReadBlock(m_pFileBuf, 0,
- std::min(m_BufSize, static_cast<uint32_t>(m_FileLen)));
+ validator->ReadBlock(m_pFileBuf, 0,
+ std::min(m_BufSize, static_cast<uint32_t>(m_FileLen)));
}
uint32_t CPDF_SyntaxParser::GetDirectNum() {
diff --git a/core/fpdfapi/parser/cpdf_syntax_parser.h b/core/fpdfapi/parser/cpdf_syntax_parser.h
index d522b4ae7a..d3bca11e59 100644
--- a/core/fpdfapi/parser/cpdf_syntax_parser.h
+++ b/core/fpdfapi/parser/cpdf_syntax_parser.h
@@ -18,6 +18,7 @@ class CPDF_CryptoHandler;
class CPDF_Dictionary;
class CPDF_IndirectObjectHolder;
class CPDF_Object;
+class CPDF_ReadValidator;
class CPDF_Stream;
class IFX_SeekableReadStream;
@@ -30,6 +31,10 @@ class CPDF_SyntaxParser {
void InitParser(const CFX_RetainPtr<IFX_SeekableReadStream>& pFileAccess,
uint32_t HeaderOffset);
+ void InitParserWithValidator(
+ const CFX_RetainPtr<CPDF_ReadValidator>& pValidator,
+ uint32_t HeaderOffset);
+
FX_FILESIZE GetPos() const { return m_Pos; }
void SetPos(FX_FILESIZE pos) { m_Pos = std::min(pos, m_FileLen); }
@@ -55,6 +60,10 @@ class CPDF_SyntaxParser {
CFX_RetainPtr<IFX_SeekableReadStream> GetFileAccess() const;
+ const CFX_RetainPtr<CPDF_ReadValidator>& GetValidator() const {
+ return m_pFileAccess;
+ }
+
private:
friend class CPDF_Parser;
friend class CPDF_DataAvail;
@@ -86,9 +95,20 @@ class CPDF_SyntaxParser {
static_cast<FX_FILESIZE>(m_BufOffset + m_BufSize) <= pos;
}
+ std::unique_ptr<CPDF_Object> GetObjectInternal(
+ CPDF_IndirectObjectHolder* pObjList,
+ uint32_t objnum,
+ uint32_t gennum,
+ bool bDecrypt);
+
+ std::unique_ptr<CPDF_Object> GetObjectForStrictInternal(
+ CPDF_IndirectObjectHolder* pObjList,
+ uint32_t objnum,
+ uint32_t gennum);
+
FX_FILESIZE m_Pos;
uint32_t m_MetadataObjnum;
- CFX_RetainPtr<IFX_SeekableReadStream> m_pFileAccess;
+ CFX_RetainPtr<CPDF_ReadValidator> m_pFileAccess;
FX_FILESIZE m_HeaderOffset;
FX_FILESIZE m_FileLen;
uint8_t* m_pFileBuf;