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-rw-r--r--BUILD.gn1
-rw-r--r--core/include/fpdfapi/fpdf_parser.h18
-rw-r--r--core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp20
-rw-r--r--core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp20
-rw-r--r--core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp52
-rw-r--r--pdfium.gyp1
6 files changed, 85 insertions, 27 deletions
diff --git a/BUILD.gn b/BUILD.gn
index 199d115d9e..2168a8246c 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1474,6 +1474,7 @@ static_library("xfa") {
test("pdfium_unittests") {
sources = [
"core/src/fpdfapi/fpdf_font/fpdf_font_unittest.cpp",
+ "core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp",
"core/src/fxcodec/codec/fx_codec_jpx_unittest.cpp",
"core/src/fxcrt/fx_basic_bstring_unittest.cpp",
"core/src/fxcrt/fx_basic_memmgr_unittest.cpp",
diff --git a/core/include/fpdfapi/fpdf_parser.h b/core/include/fpdfapi/fpdf_parser.h
index 32509eb837..d87be61ef9 100644
--- a/core/include/fpdfapi/fpdf_parser.h
+++ b/core/include/fpdfapi/fpdf_parser.h
@@ -945,6 +945,24 @@ enum PDF_DATAAVAIL_STATUS {
PDF_DATAAVAIL_TRAILER_APPEND
};
+// Public for testing.
+FX_DWORD A85Decode(const uint8_t* src_buf,
+ FX_DWORD src_size,
+ uint8_t*& dest_buf,
+ FX_DWORD& dest_size);
+// Public for testing.
+FX_DWORD HexDecode(const uint8_t* src_buf,
+ FX_DWORD src_size,
+ uint8_t*& dest_buf,
+ FX_DWORD& dest_size);
+// Public for testing.
+FX_DWORD FPDFAPI_FlateOrLZWDecode(FX_BOOL bLZW,
+ const uint8_t* src_buf,
+ FX_DWORD src_size,
+ CPDF_Dictionary* pParams,
+ FX_DWORD estimated_size,
+ uint8_t*& dest_buf,
+ FX_DWORD& dest_size);
FX_BOOL PDF_DataDecode(const uint8_t* src_buf,
FX_DWORD src_size,
const CPDF_Dictionary* pDict,
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
index 1fa27e3805..187d6152e9 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
@@ -278,21 +278,7 @@ ICodec_ScanlineDecoder* FPDFAPI_CreateFaxDecoder(
int width,
int height,
const CPDF_Dictionary* pParams);
-FX_DWORD _A85Decode(const uint8_t* src_buf,
- FX_DWORD src_size,
- uint8_t*& dest_buf,
- FX_DWORD& dest_size);
-FX_DWORD _HexDecode(const uint8_t* src_buf,
- FX_DWORD src_size,
- uint8_t*& dest_buf,
- FX_DWORD& dest_size);
-FX_DWORD FPDFAPI_FlateOrLZWDecode(FX_BOOL bLZW,
- const uint8_t* src_buf,
- FX_DWORD src_size,
- CPDF_Dictionary* pParams,
- FX_DWORD estimated_size,
- uint8_t*& dest_buf,
- FX_DWORD& dest_size);
+
FX_DWORD PDF_DecodeInlineStream(const uint8_t* src_buf,
FX_DWORD limit,
int width,
@@ -307,10 +293,10 @@ FX_DWORD PDF_DecodeInlineStream(const uint8_t* src_buf,
return _DecodeAllScanlines(pDecoder, dest_buf, dest_size);
}
if (decoder == FX_BSTRC("ASCII85Decode") || decoder == FX_BSTRC("A85")) {
- return _A85Decode(src_buf, limit, dest_buf, dest_size);
+ return A85Decode(src_buf, limit, dest_buf, dest_size);
}
if (decoder == FX_BSTRC("ASCIIHexDecode") || decoder == FX_BSTRC("AHx")) {
- return _HexDecode(src_buf, limit, dest_buf, dest_size);
+ return HexDecode(src_buf, limit, dest_buf, dest_size);
}
if (decoder == FX_BSTRC("FlateDecode") || decoder == FX_BSTRC("Fl")) {
return FPDFAPI_FlateOrLZWDecode(FALSE, src_buf, limit, pParam, dest_size,
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp
index 255d0ce29c..e68fcb6800 100644
--- a/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.cpp
@@ -42,10 +42,10 @@ const FX_WORD PDFDocEncoding[256] = {
0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, 0x00f8, 0x00f9, 0x00fa, 0x00fb,
0x00fc, 0x00fd, 0x00fe, 0x00ff};
-FX_DWORD _A85Decode(const uint8_t* src_buf,
- FX_DWORD src_size,
- uint8_t*& dest_buf,
- FX_DWORD& dest_size) {
+FX_DWORD A85Decode(const uint8_t* src_buf,
+ FX_DWORD src_size,
+ uint8_t*& dest_buf,
+ FX_DWORD& dest_size) {
dest_size = 0;
dest_buf = NULL;
if (src_size == 0) {
@@ -117,10 +117,10 @@ FX_DWORD _A85Decode(const uint8_t* src_buf,
}
return pos;
}
-FX_DWORD _HexDecode(const uint8_t* src_buf,
- FX_DWORD src_size,
- uint8_t*& dest_buf,
- FX_DWORD& dest_size) {
+FX_DWORD HexDecode(const uint8_t* src_buf,
+ FX_DWORD src_size,
+ uint8_t*& dest_buf,
+ FX_DWORD& dest_size) {
FX_DWORD i;
for (i = 0; i < src_size; i++)
if (src_buf[i] == '>') {
@@ -380,10 +380,10 @@ FX_BOOL PDF_DataDecode(const uint8_t* src_buf,
estimated_size, new_buf, new_size);
} else if (decoder == FX_BSTRC("ASCII85Decode") ||
decoder == FX_BSTRC("A85")) {
- offset = _A85Decode(last_buf, last_size, new_buf, new_size);
+ offset = A85Decode(last_buf, last_size, new_buf, new_size);
} else if (decoder == FX_BSTRC("ASCIIHexDecode") ||
decoder == FX_BSTRC("AHx")) {
- offset = _HexDecode(last_buf, last_size, new_buf, new_size);
+ offset = HexDecode(last_buf, last_size, new_buf, new_size);
} else if (decoder == FX_BSTRC("RunLengthDecode") ||
decoder == FX_BSTRC("RL")) {
if (bImageAcc && i == DecoderList.GetSize() - 1) {
diff --git a/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp
new file mode 100644
index 0000000000..f01e21293c
--- /dev/null
+++ b/core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp
@@ -0,0 +1,52 @@
+// 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/gtest/include/gtest/gtest.h"
+
+#include "../../../include/fpdfapi/fpdf_parser.h"
+
+TEST(fpdf_parser_decode, HexDecode) {
+ {
+ // Empty src string.
+ uint8_t* dest = nullptr;
+ FX_DWORD dest_size;
+ uint8_t src[] = "";
+ EXPECT_EQ(0, HexDecode(src, 0, dest, dest_size));
+ EXPECT_EQ(0, dest_size);
+ EXPECT_EQ('\0', dest[0]);
+ }
+
+ {
+ // Regular conversion.
+ uint8_t* dest = nullptr;
+ FX_DWORD dest_size;
+ uint8_t src[] = "12Ac>zzz";
+ EXPECT_EQ(5, HexDecode(src, 8, dest, dest_size));
+ EXPECT_EQ(2, dest_size);
+ EXPECT_EQ(18, dest[0]);
+ EXPECT_EQ(172, dest[1]);
+ }
+
+ {
+ // Non-multiple length.
+ uint8_t* dest = nullptr;
+ FX_DWORD dest_size;
+ uint8_t src[] = "12A>zzz";
+ EXPECT_EQ(4, HexDecode(src, 8, dest, dest_size));
+ EXPECT_EQ(2, dest_size);
+ EXPECT_EQ(18, dest[0]);
+ EXPECT_EQ(160, dest[1]);
+ }
+
+ {
+ // Skips unknown characters.
+ uint8_t* dest = nullptr;
+ FX_DWORD dest_size;
+ uint8_t src[] = "12tk \tAc>zzz";
+ EXPECT_EQ(10, HexDecode(src, 13, dest, dest_size));
+ EXPECT_EQ(2, dest_size);
+ EXPECT_EQ(18, dest[0]);
+ EXPECT_EQ(172, dest[1]);
+ }
+}
diff --git a/pdfium.gyp b/pdfium.gyp
index 44a7611740..0ca90687d1 100644
--- a/pdfium.gyp
+++ b/pdfium.gyp
@@ -749,6 +749,7 @@
],
'sources': [
'core/src/fpdfapi/fpdf_font/fpdf_font_unittest.cpp',
+ 'core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_unittest.cpp',
'core/src/fxcodec/codec/fx_codec_jpx_unittest.cpp',
'core/src/fxcrt/fx_basic_bstring_unittest.cpp',
'core/src/fxcrt/fx_basic_memmgr_unittest.cpp',
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 20:15:21 +0000