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// Copyright 2017 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string>
#include <vector>
#include "public/fpdf_attachment.h"
#include "public/fpdfview.h"
#include "testing/embedder_test.h"
#include "testing/fx_string_testhelpers.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/utils/hash.h"
static constexpr char kDateKey[] = "CreationDate";
static constexpr char kChecksumKey[] = "CheckSum";
class FPDFAttachmentEmbedderTest : public EmbedderTest {};
TEST_F(FPDFAttachmentEmbedderTest, ExtractAttachments) {
// Open a file with two attachments.
ASSERT_TRUE(OpenDocument("embedded_attachments.pdf"));
EXPECT_EQ(2, FPDFDoc_GetAttachmentCount(document()));
// Try to retrieve attachments at bad indices.
EXPECT_FALSE(FPDFDoc_GetAttachment(document(), -1));
EXPECT_FALSE(FPDFDoc_GetAttachment(document(), 2));
// Retrieve the first attachment.
FPDF_ATTACHMENT attachment = FPDFDoc_GetAttachment(document(), 0);
ASSERT_TRUE(attachment);
// Check that the name of the first attachment is correct.
unsigned long length_bytes = FPDFAttachment_GetName(attachment, nullptr, 0);
ASSERT_EQ(12u, length_bytes);
std::vector<FPDF_WCHAR> buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(12u, FPDFAttachment_GetName(attachment, buf.data(), length_bytes));
EXPECT_EQ(L"1.txt", GetPlatformWString(buf.data()));
// Check some unsuccessful cases of FPDFAttachment_GetFile.
EXPECT_FALSE(FPDFAttachment_GetFile(attachment, nullptr, 0, nullptr));
EXPECT_FALSE(FPDFAttachment_GetFile(nullptr, nullptr, 0, &length_bytes));
// Check that the content of the first attachment is correct.
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, nullptr, 0, &length_bytes));
std::vector<uint8_t> content_buf(length_bytes);
unsigned long actual_length_bytes;
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, content_buf.data(),
length_bytes, &actual_length_bytes));
ASSERT_THAT(content_buf, testing::ElementsAre('t', 'e', 's', 't'));
// Check that a non-existent key does not exist.
EXPECT_FALSE(FPDFAttachment_HasKey(attachment, "none"));
// Check that the string value of a non-string dictionary entry is empty.
static constexpr char kSizeKey[] = "Size";
EXPECT_EQ(FPDF_OBJECT_NUMBER,
FPDFAttachment_GetValueType(attachment, kSizeKey));
EXPECT_EQ(2u,
FPDFAttachment_GetStringValue(attachment, kSizeKey, nullptr, 0));
// Check that the creation date of the first attachment is correct.
length_bytes =
FPDFAttachment_GetStringValue(attachment, kDateKey, nullptr, 0);
ASSERT_EQ(48u, length_bytes);
buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(48u, FPDFAttachment_GetStringValue(attachment, kDateKey, buf.data(),
length_bytes));
EXPECT_EQ(L"D:20170712214438-07'00'", GetPlatformWString(buf.data()));
// Retrieve the second attachment.
attachment = FPDFDoc_GetAttachment(document(), 1);
ASSERT_TRUE(attachment);
// Retrieve the second attachment file.
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, nullptr, 0, &length_bytes));
content_buf.clear();
content_buf.resize(length_bytes);
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, content_buf.data(),
length_bytes, &actual_length_bytes));
ASSERT_EQ(5869u, actual_length_bytes);
// Check that the calculated checksum of the file data matches expectation.
const char kCheckSum[] = "72afcddedf554dda63c0c88e06f1ce18";
const wchar_t kCheckSumW[] = L"<72AFCDDEDF554DDA63C0C88E06F1CE18>";
const std::string generated_checksum = GenerateMD5Base16(content_buf);
EXPECT_EQ(kCheckSum, generated_checksum);
// Check that the stored checksum matches expectation.
length_bytes =
FPDFAttachment_GetStringValue(attachment, kChecksumKey, nullptr, 0);
ASSERT_EQ(70u, length_bytes);
buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(70u, FPDFAttachment_GetStringValue(attachment, kChecksumKey,
buf.data(), length_bytes));
EXPECT_EQ(kCheckSumW, GetPlatformWString(buf.data()));
}
TEST_F(FPDFAttachmentEmbedderTest, NoAttachmentToExtract) {
// Open a file with no attachments.
ASSERT_TRUE(OpenDocument("hello_world.pdf"));
EXPECT_EQ(0, FPDFDoc_GetAttachmentCount(document()));
// Try to retrieve attachments at bad indices.
EXPECT_FALSE(FPDFDoc_GetAttachment(document(), -1));
EXPECT_FALSE(FPDFDoc_GetAttachment(document(), 0));
}
TEST_F(FPDFAttachmentEmbedderTest, InvalidAttachmentData) {
// Open a file with an attachment that is missing the embedded file (/EF).
ASSERT_TRUE(OpenDocument("embedded_attachments_invalid_data.pdf"));
ASSERT_EQ(1, FPDFDoc_GetAttachmentCount(document()));
// Retrieve the first attachment.
FPDF_ATTACHMENT attachment = FPDFDoc_GetAttachment(document(), 0);
ASSERT_TRUE(attachment);
// Check that the name of the attachment is correct.
unsigned long length_bytes = FPDFAttachment_GetName(attachment, nullptr, 0);
ASSERT_EQ(12u, length_bytes);
std::vector<FPDF_WCHAR> buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(12u, FPDFAttachment_GetName(attachment, buf.data(), length_bytes));
EXPECT_EQ("1.txt", GetPlatformString(buf.data()));
// Check that is is not possible to retrieve the file data.
EXPECT_FALSE(FPDFAttachment_GetFile(attachment, nullptr, 0, &length_bytes));
// Check that the attachment can be deleted.
EXPECT_TRUE(FPDFDoc_DeleteAttachment(document(), 0));
EXPECT_EQ(0, FPDFDoc_GetAttachmentCount(document()));
}
TEST_F(FPDFAttachmentEmbedderTest, AddAttachments) {
// Open a file with two attachments.
ASSERT_TRUE(OpenDocument("embedded_attachments.pdf"));
EXPECT_EQ(2, FPDFDoc_GetAttachmentCount(document()));
// Check that adding an attachment with an empty name would fail.
EXPECT_FALSE(FPDFDoc_AddAttachment(document(), nullptr));
// Add an attachment to the beginning of the embedded file list.
ScopedFPDFWideString file_name = GetFPDFWideString(L"0.txt");
FPDF_ATTACHMENT attachment =
FPDFDoc_AddAttachment(document(), file_name.get());
ASSERT_TRUE(attachment);
// Check that writing to a file with nullptr but non-zero bytes would fail.
EXPECT_FALSE(FPDFAttachment_SetFile(attachment, document(), nullptr, 10));
// Set the new attachment's file.
constexpr char kContents1[] = "Hello!";
EXPECT_TRUE(FPDFAttachment_SetFile(attachment, document(), kContents1,
strlen(kContents1)));
EXPECT_EQ(3, FPDFDoc_GetAttachmentCount(document()));
// Verify the name of the new attachment (i.e. the first attachment).
attachment = FPDFDoc_GetAttachment(document(), 0);
ASSERT_TRUE(attachment);
unsigned long length_bytes = FPDFAttachment_GetName(attachment, nullptr, 0);
ASSERT_EQ(12u, length_bytes);
std::vector<FPDF_WCHAR> buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(12u, FPDFAttachment_GetName(attachment, buf.data(), length_bytes));
EXPECT_EQ(L"0.txt", GetPlatformWString(buf.data()));
// Verify the content of the new attachment (i.e. the first attachment).
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, nullptr, 0, &length_bytes));
std::vector<char> content_buf(length_bytes);
unsigned long actual_length_bytes;
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, content_buf.data(),
length_bytes, &actual_length_bytes));
ASSERT_EQ(6u, actual_length_bytes);
EXPECT_EQ(std::string(kContents1), std::string(content_buf.data(), 6));
// Add an attachment to the end of the embedded file list and set its file.
file_name = GetFPDFWideString(L"z.txt");
attachment = FPDFDoc_AddAttachment(document(), file_name.get());
ASSERT_TRUE(attachment);
constexpr char kContents2[] = "World!";
EXPECT_TRUE(FPDFAttachment_SetFile(attachment, document(), kContents2,
strlen(kContents2)));
EXPECT_EQ(4, FPDFDoc_GetAttachmentCount(document()));
// Verify the name of the new attachment (i.e. the fourth attachment).
attachment = FPDFDoc_GetAttachment(document(), 3);
ASSERT_TRUE(attachment);
length_bytes = FPDFAttachment_GetName(attachment, nullptr, 0);
ASSERT_EQ(12u, length_bytes);
buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(12u, FPDFAttachment_GetName(attachment, buf.data(), length_bytes));
EXPECT_EQ(L"z.txt", GetPlatformWString(buf.data()));
// Verify the content of the new attachment (i.e. the fourth attachment).
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, nullptr, 0, &length_bytes));
content_buf.clear();
content_buf.resize(length_bytes);
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, content_buf.data(),
length_bytes, &actual_length_bytes));
ASSERT_EQ(6u, actual_length_bytes);
EXPECT_EQ(std::string(kContents2), std::string(content_buf.data(), 6));
}
TEST_F(FPDFAttachmentEmbedderTest, AddAttachmentsWithParams) {
// Open a file with two attachments.
ASSERT_TRUE(OpenDocument("embedded_attachments.pdf"));
EXPECT_EQ(2, FPDFDoc_GetAttachmentCount(document()));
// Add an attachment to the embedded file list.
ScopedFPDFWideString file_name = GetFPDFWideString(L"5.txt");
FPDF_ATTACHMENT attachment =
FPDFDoc_AddAttachment(document(), file_name.get());
ASSERT_TRUE(attachment);
constexpr char kContents[] = "Hello World!";
EXPECT_TRUE(FPDFAttachment_SetFile(attachment, document(), kContents,
strlen(kContents)));
// Set the date to be an arbitrary value.
constexpr wchar_t kDateW[] = L"D:20170720161527-04'00'";
ScopedFPDFWideString ws_date = GetFPDFWideString(kDateW);
EXPECT_TRUE(
FPDFAttachment_SetStringValue(attachment, kDateKey, ws_date.get()));
// Set the checksum to be an arbitrary value.
constexpr wchar_t kCheckSumW[] = L"<ABCDEF01234567899876543210FEDCBA>";
ScopedFPDFWideString ws_checksum = GetFPDFWideString(kCheckSumW);
EXPECT_TRUE(FPDFAttachment_SetStringValue(attachment, kChecksumKey,
ws_checksum.get()));
// Verify the name of the new attachment (i.e. the second attachment).
attachment = FPDFDoc_GetAttachment(document(), 1);
ASSERT_TRUE(attachment);
unsigned long length_bytes = FPDFAttachment_GetName(attachment, nullptr, 0);
ASSERT_EQ(12u, length_bytes);
std::vector<FPDF_WCHAR> buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(12u, FPDFAttachment_GetName(attachment, buf.data(), length_bytes));
EXPECT_EQ(L"5.txt", GetPlatformWString(buf.data()));
// Verify the content of the new attachment.
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, nullptr, 0, &length_bytes));
std::vector<char> content_buf(length_bytes);
unsigned long actual_length_bytes;
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, content_buf.data(),
length_bytes, &actual_length_bytes));
ASSERT_EQ(12u, actual_length_bytes);
EXPECT_EQ(std::string(kContents), std::string(content_buf.data(), 12));
// Verify the creation date of the new attachment.
length_bytes =
FPDFAttachment_GetStringValue(attachment, kDateKey, nullptr, 0);
ASSERT_EQ(48u, length_bytes);
buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(48u, FPDFAttachment_GetStringValue(attachment, kDateKey, buf.data(),
length_bytes));
EXPECT_EQ(kDateW, GetPlatformWString(buf.data()));
// Verify the checksum of the new attachment.
length_bytes =
FPDFAttachment_GetStringValue(attachment, kChecksumKey, nullptr, 0);
ASSERT_EQ(70u, length_bytes);
buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(70u, FPDFAttachment_GetStringValue(attachment, kChecksumKey,
buf.data(), length_bytes));
EXPECT_EQ(kCheckSumW, GetPlatformWString(buf.data()));
// Overwrite the existing file with empty content, and check that the checksum
// gets updated to the correct value.
EXPECT_TRUE(FPDFAttachment_SetFile(attachment, document(), nullptr, 0));
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, nullptr, 0, &length_bytes));
EXPECT_EQ(0u, length_bytes);
length_bytes =
FPDFAttachment_GetStringValue(attachment, kChecksumKey, nullptr, 0);
ASSERT_EQ(70u, length_bytes);
buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(70u, FPDFAttachment_GetStringValue(attachment, kChecksumKey,
buf.data(), length_bytes));
EXPECT_EQ(L"<D41D8CD98F00B204E9800998ECF8427E>",
GetPlatformWString(buf.data()));
}
TEST_F(FPDFAttachmentEmbedderTest, AddAttachmentsToFileWithNoAttachments) {
// Open a file with no attachments.
ASSERT_TRUE(OpenDocument("hello_world.pdf"));
EXPECT_EQ(0, FPDFDoc_GetAttachmentCount(document()));
// Add an attachment to the beginning of the embedded file list.
ScopedFPDFWideString file_name = GetFPDFWideString(L"0.txt");
FPDF_ATTACHMENT attachment =
FPDFDoc_AddAttachment(document(), file_name.get());
ASSERT_TRUE(attachment);
// Set the new attachment's file.
constexpr char kContents1[] = "Hello!";
EXPECT_TRUE(FPDFAttachment_SetFile(attachment, document(), kContents1,
strlen(kContents1)));
EXPECT_EQ(1, FPDFDoc_GetAttachmentCount(document()));
// Verify the name of the new attachment (i.e. the first attachment).
attachment = FPDFDoc_GetAttachment(document(), 0);
ASSERT_TRUE(attachment);
unsigned long length_bytes = FPDFAttachment_GetName(attachment, nullptr, 0);
ASSERT_EQ(12u, length_bytes);
std::vector<FPDF_WCHAR> buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(12u, FPDFAttachment_GetName(attachment, buf.data(), length_bytes));
EXPECT_EQ(L"0.txt", GetPlatformWString(buf.data()));
// Verify the content of the new attachment (i.e. the first attachment).
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, nullptr, 0, &length_bytes));
std::vector<char> content_buf(length_bytes);
unsigned long actual_length_bytes;
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, content_buf.data(),
length_bytes, &actual_length_bytes));
ASSERT_EQ(6u, actual_length_bytes);
EXPECT_EQ(std::string(kContents1), std::string(content_buf.data(), 6));
// Add an attachment to the end of the embedded file list and set its file.
file_name = GetFPDFWideString(L"z.txt");
attachment = FPDFDoc_AddAttachment(document(), file_name.get());
ASSERT_TRUE(attachment);
constexpr char kContents2[] = "World!";
EXPECT_TRUE(FPDFAttachment_SetFile(attachment, document(), kContents2,
strlen(kContents2)));
EXPECT_EQ(2, FPDFDoc_GetAttachmentCount(document()));
// Verify the name of the new attachment (i.e. the second attachment).
attachment = FPDFDoc_GetAttachment(document(), 1);
ASSERT_TRUE(attachment);
length_bytes = FPDFAttachment_GetName(attachment, nullptr, 0);
ASSERT_EQ(12u, length_bytes);
buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(12u, FPDFAttachment_GetName(attachment, buf.data(), length_bytes));
EXPECT_EQ(L"z.txt", GetPlatformWString(buf.data()));
// Verify the content of the new attachment (i.e. the second attachment).
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, nullptr, 0, &length_bytes));
content_buf.clear();
content_buf.resize(length_bytes);
ASSERT_TRUE(FPDFAttachment_GetFile(attachment, content_buf.data(),
length_bytes, &actual_length_bytes));
ASSERT_EQ(6u, actual_length_bytes);
EXPECT_EQ(std::string(kContents2), std::string(content_buf.data(), 6));
}
TEST_F(FPDFAttachmentEmbedderTest, DeleteAttachment) {
// Open a file with two attachments.
ASSERT_TRUE(OpenDocument("embedded_attachments.pdf"));
EXPECT_EQ(2, FPDFDoc_GetAttachmentCount(document()));
// Verify the name of the first attachment.
FPDF_ATTACHMENT attachment = FPDFDoc_GetAttachment(document(), 0);
ASSERT_TRUE(attachment);
unsigned long length_bytes = FPDFAttachment_GetName(attachment, nullptr, 0);
ASSERT_EQ(12u, length_bytes);
std::vector<FPDF_WCHAR> buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(12u, FPDFAttachment_GetName(attachment, buf.data(), length_bytes));
EXPECT_EQ(L"1.txt", GetPlatformWString(buf.data()));
// Delete the first attachment.
EXPECT_TRUE(FPDFDoc_DeleteAttachment(document(), 0));
EXPECT_EQ(1, FPDFDoc_GetAttachmentCount(document()));
// Verify the name of the new first attachment.
attachment = FPDFDoc_GetAttachment(document(), 0);
ASSERT_TRUE(attachment);
length_bytes = FPDFAttachment_GetName(attachment, nullptr, 0);
ASSERT_EQ(26u, length_bytes);
buf = GetFPDFWideStringBuffer(length_bytes);
EXPECT_EQ(26u, FPDFAttachment_GetName(attachment, buf.data(), length_bytes));
EXPECT_EQ(L"attached.pdf", GetPlatformWString(buf.data()));
}
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