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// Copyright 2018 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.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "fpdfsdk/cpdfsdk_helpers.h"
#include "build/build_config.h"
#include "constants/form_fields.h"
#include "constants/stream_dict_common.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fpdfapi/render/cpdf_renderoptions.h"
#include "core/fpdfdoc/cpdf_annot.h"
#include "core/fpdfdoc/cpdf_interactiveform.h"
#include "core/fpdfdoc/cpdf_metadata.h"
#include "fpdfsdk/cpdfsdk_formfillenvironment.h"
namespace {
constexpr char kQuadPoints[] = "QuadPoints";
// 0 bit: FPDF_POLICY_MACHINETIME_ACCESS
uint32_t g_sandbox_policy = 0xFFFFFFFF;
UNSUPPORT_INFO* g_unsupport_info = nullptr;
bool RaiseUnsupportedError(int nError) {
if (!g_unsupport_info)
return false;
if (g_unsupport_info->FSDK_UnSupport_Handler)
g_unsupport_info->FSDK_UnSupport_Handler(g_unsupport_info, nError);
return true;
}
// Use the existence of the XFA array as a signal for XFA forms.
bool DocHasXFA(const CPDF_Document* doc) {
const CPDF_Dictionary* root = doc->GetRoot();
if (!root)
return false;
const CPDF_Dictionary* form = root->GetDictFor("AcroForm");
return form && form->GetArrayFor("XFA");
}
unsigned long GetStreamMaybeCopyAndReturnLengthImpl(const CPDF_Stream* stream,
void* buffer,
unsigned long buflen,
bool decode) {
ASSERT(stream);
auto stream_acc = pdfium::MakeRetain<CPDF_StreamAcc>(stream);
if (decode)
stream_acc->LoadAllDataFiltered();
else
stream_acc->LoadAllDataRaw();
const auto stream_data_size = stream_acc->GetSize();
if (!buffer || buflen < stream_data_size)
return stream_data_size;
memcpy(buffer, stream_acc->GetData(), stream_data_size);
return stream_data_size;
}
#ifdef PDF_ENABLE_XFA
class FPDF_FileHandlerContext final : public IFX_SeekableStream {
public:
CONSTRUCT_VIA_MAKE_RETAIN;
// IFX_SeekableStream:
FX_FILESIZE GetSize() override;
bool IsEOF() override;
FX_FILESIZE GetPosition() override;
bool ReadBlockAtOffset(void* buffer,
FX_FILESIZE offset,
size_t size) override;
size_t ReadBlock(void* buffer, size_t size) override;
bool WriteBlockAtOffset(const void* buffer,
FX_FILESIZE offset,
size_t size) override;
bool Flush() override;
void SetPosition(FX_FILESIZE pos) { m_nCurPos = pos; }
private:
explicit FPDF_FileHandlerContext(FPDF_FILEHANDLER* pFS);
~FPDF_FileHandlerContext() override;
FPDF_FILEHANDLER* m_pFS;
FX_FILESIZE m_nCurPos;
};
FPDF_FileHandlerContext::FPDF_FileHandlerContext(FPDF_FILEHANDLER* pFS) {
m_pFS = pFS;
m_nCurPos = 0;
}
FPDF_FileHandlerContext::~FPDF_FileHandlerContext() {
if (m_pFS && m_pFS->Release)
m_pFS->Release(m_pFS->clientData);
}
FX_FILESIZE FPDF_FileHandlerContext::GetSize() {
if (m_pFS && m_pFS->GetSize)
return (FX_FILESIZE)m_pFS->GetSize(m_pFS->clientData);
return 0;
}
bool FPDF_FileHandlerContext::IsEOF() {
return m_nCurPos >= GetSize();
}
FX_FILESIZE FPDF_FileHandlerContext::GetPosition() {
return m_nCurPos;
}
bool FPDF_FileHandlerContext::ReadBlockAtOffset(void* buffer,
FX_FILESIZE offset,
size_t size) {
if (!buffer || !size || !m_pFS->ReadBlock)
return false;
if (m_pFS->ReadBlock(m_pFS->clientData, (FPDF_DWORD)offset, buffer,
(FPDF_DWORD)size) == 0) {
m_nCurPos = offset + size;
return true;
}
return false;
}
size_t FPDF_FileHandlerContext::ReadBlock(void* buffer, size_t size) {
if (!buffer || !size || !m_pFS->ReadBlock)
return 0;
FX_FILESIZE nSize = GetSize();
if (m_nCurPos >= nSize)
return 0;
FX_FILESIZE dwAvail = nSize - m_nCurPos;
if (dwAvail < (FX_FILESIZE)size)
size = static_cast<size_t>(dwAvail);
if (m_pFS->ReadBlock(m_pFS->clientData, (FPDF_DWORD)m_nCurPos, buffer,
(FPDF_DWORD)size) == 0) {
m_nCurPos += size;
return size;
}
return 0;
}
bool FPDF_FileHandlerContext::WriteBlockAtOffset(const void* buffer,
FX_FILESIZE offset,
size_t size) {
if (!m_pFS || !m_pFS->WriteBlock)
return false;
if (m_pFS->WriteBlock(m_pFS->clientData, (FPDF_DWORD)offset, buffer,
(FPDF_DWORD)size) == 0) {
m_nCurPos = offset + size;
return true;
}
return false;
}
bool FPDF_FileHandlerContext::Flush() {
if (!m_pFS || !m_pFS->Flush)
return true;
return m_pFS->Flush(m_pFS->clientData) == 0;
}
#endif // PDF_ENABLE_XFA
} // namespace
IPDF_Page* IPDFPageFromFPDFPage(FPDF_PAGE page) {
return reinterpret_cast<IPDF_Page*>(page);
}
FPDF_PAGE FPDFPageFromIPDFPage(IPDF_Page* page) {
return reinterpret_cast<FPDF_PAGE>(page);
}
CPDF_Document* CPDFDocumentFromFPDFDocument(FPDF_DOCUMENT doc) {
return reinterpret_cast<CPDF_Document*>(doc);
}
FPDF_DOCUMENT FPDFDocumentFromCPDFDocument(CPDF_Document* doc) {
return reinterpret_cast<FPDF_DOCUMENT>(doc);
}
CPDF_Page* CPDFPageFromFPDFPage(FPDF_PAGE page) {
return page ? IPDFPageFromFPDFPage(page)->AsPDFPage() : nullptr;
}
CPDFSDK_InteractiveForm* FormHandleToInteractiveForm(FPDF_FORMHANDLE hHandle) {
CPDFSDK_FormFillEnvironment* pFormFillEnv =
CPDFSDKFormFillEnvironmentFromFPDFFormHandle(hHandle);
return pFormFillEnv ? pFormFillEnv->GetInteractiveForm() : nullptr;
}
ByteString ByteStringFromFPDFWideString(FPDF_WIDESTRING wide_string) {
return WideStringFromFPDFWideString(wide_string).ToUTF8();
}
WideString WideStringFromFPDFWideString(FPDF_WIDESTRING wide_string) {
return WideString::FromUTF16LE(wide_string,
WideString::WStringLength(wide_string));
}
#ifdef PDF_ENABLE_XFA
RetainPtr<IFX_SeekableStream> MakeSeekableStream(
FPDF_FILEHANDLER* pFilehandler) {
return pdfium::MakeRetain<FPDF_FileHandlerContext>(pFilehandler);
}
#endif // PDF_ENABLE_XFA
const CPDF_Array* GetQuadPointsArrayFromDictionary(
const CPDF_Dictionary* dict) {
return dict->GetArrayFor("QuadPoints");
}
CPDF_Array* GetQuadPointsArrayFromDictionary(CPDF_Dictionary* dict) {
return dict->GetArrayFor("QuadPoints");
}
CPDF_Array* AddQuadPointsArrayToDictionary(CPDF_Dictionary* dict) {
return dict->SetNewFor<CPDF_Array>(kQuadPoints);
}
bool IsValidQuadPointsIndex(const CPDF_Array* array, size_t index) {
return array && index < array->size() / 8;
}
bool GetQuadPointsAtIndex(const CPDF_Array* array,
size_t quad_index,
FS_QUADPOINTSF* quad_points) {
ASSERT(quad_points);
ASSERT(array);
if (!IsValidQuadPointsIndex(array, quad_index))
return false;
quad_index *= 8;
quad_points->x1 = array->GetNumberAt(quad_index);
quad_points->y1 = array->GetNumberAt(quad_index + 1);
quad_points->x2 = array->GetNumberAt(quad_index + 2);
quad_points->y2 = array->GetNumberAt(quad_index + 3);
quad_points->x3 = array->GetNumberAt(quad_index + 4);
quad_points->y3 = array->GetNumberAt(quad_index + 5);
quad_points->x4 = array->GetNumberAt(quad_index + 6);
quad_points->y4 = array->GetNumberAt(quad_index + 7);
return true;
}
CFX_PointF CFXPointFFromFSPointF(const FS_POINTF& point) {
return CFX_PointF(point.x, point.y);
}
CFX_FloatRect CFXFloatRectFromFSRectF(const FS_RECTF& rect) {
return CFX_FloatRect(rect.left, rect.bottom, rect.right, rect.top);
}
FS_RECTF FSRectFFromCFXFloatRect(const CFX_FloatRect& rect) {
return {rect.left, rect.top, rect.right, rect.bottom};
}
CFX_Matrix CFXMatrixFromFSMatrix(const FS_MATRIX& matrix) {
return CFX_Matrix(matrix.a, matrix.b, matrix.c, matrix.d, matrix.e, matrix.f);
}
FS_MATRIX FSMatrixFromCFXMatrix(const CFX_Matrix& matrix) {
return {matrix.a, matrix.b, matrix.c, matrix.d, matrix.e, matrix.f};
}
unsigned long NulTerminateMaybeCopyAndReturnLength(const ByteString& text,
void* buffer,
unsigned long buflen) {
unsigned long len = text.GetLength() + 1;
if (buffer && len <= buflen)
memcpy(buffer, text.c_str(), len);
return len;
}
unsigned long Utf16EncodeMaybeCopyAndReturnLength(const WideString& text,
void* buffer,
unsigned long buflen) {
ByteString encoded_text = text.ToUTF16LE();
unsigned long len = encoded_text.GetLength();
if (buffer && len <= buflen)
memcpy(buffer, encoded_text.c_str(), len);
return len;
}
unsigned long GetRawStreamMaybeCopyAndReturnLength(const CPDF_Stream* stream,
void* buffer,
unsigned long buflen) {
return GetStreamMaybeCopyAndReturnLengthImpl(stream, buffer, buflen,
/*decode=*/false);
}
unsigned long DecodeStreamMaybeCopyAndReturnLength(const CPDF_Stream* stream,
void* buffer,
unsigned long buflen) {
return GetStreamMaybeCopyAndReturnLengthImpl(stream, buffer, buflen,
/*decode=*/true);
}
void SetPDFSandboxPolicy(FPDF_DWORD policy, FPDF_BOOL enable) {
switch (policy) {
case FPDF_POLICY_MACHINETIME_ACCESS: {
uint32_t mask = 1 << policy;
if (enable)
g_sandbox_policy |= mask;
else
g_sandbox_policy &= ~mask;
} break;
default:
break;
}
}
FPDF_BOOL IsPDFSandboxPolicyEnabled(FPDF_DWORD policy) {
switch (policy) {
case FPDF_POLICY_MACHINETIME_ACCESS: {
uint32_t mask = 1 << policy;
return !!(g_sandbox_policy & mask);
}
default:
return false;
}
}
void SetPDFUnsupportInfo(UNSUPPORT_INFO* unsp_info) {
g_unsupport_info = unsp_info;
}
void ReportUnsupportedFeatures(const CPDF_Document* pDoc) {
const CPDF_Dictionary* pRootDict = pDoc->GetRoot();
if (!pRootDict)
return;
// Portfolios and Packages
if (pRootDict->KeyExist("Collection"))
RaiseUnsupportedError(FPDF_UNSP_DOC_PORTABLECOLLECTION);
const CPDF_Dictionary* pNameDict = pRootDict->GetDictFor("Names");
if (pNameDict) {
if (pNameDict->KeyExist("EmbeddedFiles"))
RaiseUnsupportedError(FPDF_UNSP_DOC_ATTACHMENT);
const CPDF_Dictionary* pJSDict = pNameDict->GetDictFor("JavaScript");
if (pJSDict) {
const CPDF_Array* pArray = pJSDict->GetArrayFor("Names");
if (pArray) {
for (size_t i = 0; i < pArray->size(); i++) {
ByteString cbStr = pArray->GetStringAt(i);
if (cbStr.Compare("com.adobe.acrobat.SharedReview.Register") == 0) {
RaiseUnsupportedError(FPDF_UNSP_DOC_SHAREDREVIEW);
break;
}
}
}
}
}
// SharedForm
const CPDF_Stream* pStream = pRootDict->GetStreamFor("Metadata");
if (pStream) {
CPDF_Metadata metadata(pStream);
for (const UnsupportedFeature& feature : metadata.CheckForSharedForm())
RaiseUnsupportedError(static_cast<int>(feature));
}
}
void ReportUnsupportedXFA(const CPDF_Document* pDoc) {
if (!pDoc->GetExtension() && DocHasXFA(pDoc))
RaiseUnsupportedError(FPDF_UNSP_DOC_XFAFORM);
}
void CheckForUnsupportedAnnot(const CPDF_Annot* pAnnot) {
switch (pAnnot->GetSubtype()) {
case CPDF_Annot::Subtype::FILEATTACHMENT:
RaiseUnsupportedError(FPDF_UNSP_ANNOT_ATTACHMENT);
break;
case CPDF_Annot::Subtype::MOVIE:
RaiseUnsupportedError(FPDF_UNSP_ANNOT_MOVIE);
break;
case CPDF_Annot::Subtype::RICHMEDIA:
RaiseUnsupportedError(FPDF_UNSP_ANNOT_SCREEN_RICHMEDIA);
break;
case CPDF_Annot::Subtype::SCREEN: {
const CPDF_Dictionary* pAnnotDict = pAnnot->GetAnnotDict();
ByteString cbString = pAnnotDict->GetStringFor("IT");
if (cbString != "Img")
RaiseUnsupportedError(FPDF_UNSP_ANNOT_SCREEN_MEDIA);
break;
}
case CPDF_Annot::Subtype::SOUND:
RaiseUnsupportedError(FPDF_UNSP_ANNOT_SOUND);
break;
case CPDF_Annot::Subtype::THREED:
RaiseUnsupportedError(FPDF_UNSP_ANNOT_3DANNOT);
break;
case CPDF_Annot::Subtype::WIDGET: {
const CPDF_Dictionary* pAnnotDict = pAnnot->GetAnnotDict();
ByteString cbString = pAnnotDict->GetStringFor(pdfium::form_fields::kFT);
if (cbString == pdfium::form_fields::kSig)
RaiseUnsupportedError(FPDF_UNSP_ANNOT_SIG);
break;
}
default:
break;
}
}
void ProcessParseError(CPDF_Parser::Error err) {
uint32_t err_code = FPDF_ERR_SUCCESS;
// Translate FPDFAPI error code to FPDFVIEW error code
switch (err) {
case CPDF_Parser::SUCCESS:
err_code = FPDF_ERR_SUCCESS;
break;
case CPDF_Parser::FILE_ERROR:
err_code = FPDF_ERR_FILE;
break;
case CPDF_Parser::FORMAT_ERROR:
err_code = FPDF_ERR_FORMAT;
break;
case CPDF_Parser::PASSWORD_ERROR:
err_code = FPDF_ERR_PASSWORD;
break;
case CPDF_Parser::HANDLER_ERROR:
err_code = FPDF_ERR_SECURITY;
break;
}
FXSYS_SetLastError(err_code);
}
void SetColorFromScheme(const FPDF_COLORSCHEME* pColorScheme,
CPDF_RenderOptions* pRenderOptions) {
CPDF_RenderOptions::ColorScheme color_scheme;
color_scheme.path_fill_color = pColorScheme->path_fill_color;
color_scheme.path_stroke_color = pColorScheme->path_stroke_color;
color_scheme.text_fill_color = pColorScheme->text_fill_color;
color_scheme.text_stroke_color = pColorScheme->text_stroke_color;
pRenderOptions->SetColorScheme(color_scheme);
}