blob: 354126b409827a293537f03b06220d852a376d68 [file] [log] [blame]
// Copyright 2016 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.
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include "core/fdrm/fx_crypt.h"
#include "core/fxcrt/bytestring.h"
#include "core/fxcrt/cfx_binarybuf.h"
#include "core/fxcrt/fx_memory_wrappers.h"
#include "core/fxcrt/retain_ptr.h"
#include "third_party/base/span.h"
class CPDF_Dictionary;
class CPDF_Object;
class CPDF_CryptoHandler {
enum class Cipher {
kNone = 0,
kRC4 = 1,
kAES = 2,
kAES2 = 3,
static bool IsSignatureDictionary(const CPDF_Dictionary* dictionary);
CPDF_CryptoHandler(Cipher cipher, const uint8_t* key, size_t keylen);
bool DecryptObjectTree(RetainPtr<CPDF_Object> object);
size_t EncryptGetSize(pdfium::span<const uint8_t> source) const;
void EncryptContent(uint32_t objnum,
uint32_t gennum,
pdfium::span<const uint8_t> source,
uint8_t* dest_buf,
size_t& dest_size) const;
bool IsCipherAES() const;
size_t DecryptGetSize(size_t src_size);
void* DecryptStart(uint32_t objnum, uint32_t gennum);
ByteString Decrypt(uint32_t objnum, uint32_t gennum, const ByteString& str);
bool DecryptStream(void* context,
pdfium::span<const uint8_t> source,
CFX_BinaryBuf& dest_buf);
bool DecryptFinish(void* context, CFX_BinaryBuf& dest_buf);
void PopulateKey(uint32_t objnum, uint32_t gennum, uint8_t* key) const;
const size_t m_KeyLen;
const Cipher m_Cipher;
std::unique_ptr<CRYPT_aes_context, FxFreeDeleter> m_pAESContext;
uint8_t m_EncryptKey[32];