From e4289f69a28d26d14c94bcc0c0b8368dbc2f7e1c Mon Sep 17 00:00:00 2001
From: Artem Strygin <art-snake@yandex-team.ru>
Date: Tue, 3 Oct 2017 18:16:25 +0300
Subject: Remove the parser from the CPDF_SecurityHandler .

Change-Id: I9fb651285c158e0f61d19e1aaf0d8bcfd302a22f
Reviewed-on: https://pdfium-review.googlesource.com/15290
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Art Snake <art-snake@yandex-team.ru>
---
 core/fpdfapi/parser/cpdf_parser.cpp           |  3 ++-
 core/fpdfapi/parser/cpdf_security_handler.cpp | 26 ++++++++++++--------------
 core/fpdfapi/parser/cpdf_security_handler.h   |  7 +++++--
 3 files changed, 19 insertions(+), 17 deletions(-)

diff --git a/core/fpdfapi/parser/cpdf_parser.cpp b/core/fpdfapi/parser/cpdf_parser.cpp
index 1965146728..17f49c6324 100644
--- a/core/fpdfapi/parser/cpdf_parser.cpp
+++ b/core/fpdfapi/parser/cpdf_parser.cpp
@@ -311,7 +311,8 @@ CPDF_Parser::Error CPDF_Parser::SetEncryptHandler() {
 
     std::unique_ptr<CPDF_SecurityHandler> pSecurityHandler =
         pdfium::MakeUnique<CPDF_SecurityHandler>();
-    if (!pSecurityHandler->OnInit(this, m_pEncryptDict.Get()))
+    if (!pSecurityHandler->OnInit(m_pEncryptDict.Get(), GetIDArray(),
+                                  m_Password))
       return PASSWORD_ERROR;
 
     m_pSecurityHandler = std::move(pSecurityHandler);
diff --git a/core/fpdfapi/parser/cpdf_security_handler.cpp b/core/fpdfapi/parser/cpdf_security_handler.cpp
index b838e9cf05..dce2ac4fdc 100644
--- a/core/fpdfapi/parser/cpdf_security_handler.cpp
+++ b/core/fpdfapi/parser/cpdf_security_handler.cpp
@@ -17,7 +17,6 @@
 #include "core/fpdfapi/parser/cpdf_crypto_handler.h"
 #include "core/fpdfapi/parser/cpdf_dictionary.h"
 #include "core/fpdfapi/parser/cpdf_object.h"
-#include "core/fpdfapi/parser/cpdf_parser.h"
 #include "core/fpdfapi/parser/cpdf_string.h"
 
 namespace {
@@ -33,7 +32,7 @@ void CalcEncryptKey(CPDF_Dictionary* pEncrypt,
                     uint8_t* key,
                     int keylen,
                     bool bIgnoreMeta,
-                    CPDF_Array* pIdArray) {
+                    const CPDF_Array* pIdArray) {
   int revision = pEncrypt->GetIntegerFor("R");
   uint8_t passcode[32];
   for (uint32_t i = 0; i < 32; i++) {
@@ -75,7 +74,6 @@ void CalcEncryptKey(CPDF_Dictionary* pEncrypt,
 CPDF_SecurityHandler::CPDF_SecurityHandler()
     : m_Version(0),
       m_Revision(0),
-      m_pParser(nullptr),
       m_pEncryptDict(nullptr),
       m_Permissions(0),
       m_Cipher(FXCIPHER_NONE),
@@ -84,9 +82,11 @@ CPDF_SecurityHandler::CPDF_SecurityHandler()
 
 CPDF_SecurityHandler::~CPDF_SecurityHandler() {}
 
-bool CPDF_SecurityHandler::OnInit(CPDF_Parser* pParser,
-                                  CPDF_Dictionary* pEncryptDict) {
-  m_pParser = pParser;
+bool CPDF_SecurityHandler::OnInit(CPDF_Dictionary* pEncryptDict,
+                                  const CPDF_Array* pIdArray,
+                                  const ByteString& password) {
+  m_pIdArray = pIdArray;
+  m_Password = password;
   if (!LoadDict(pEncryptDict)) {
     return false;
   }
@@ -97,14 +97,13 @@ bool CPDF_SecurityHandler::OnInit(CPDF_Parser* pParser,
 }
 
 bool CPDF_SecurityHandler::CheckSecurity(int32_t key_len) {
-  ByteString password = m_pParser->GetPassword();
-  if (!password.IsEmpty() &&
-      CheckPassword(password.raw_str(), password.GetLength(), true,
+  if (!m_Password.IsEmpty() &&
+      CheckPassword(m_Password.raw_str(), m_Password.GetLength(), true,
                     m_EncryptKey, key_len)) {
     m_bOwnerUnlocked = true;
     return true;
   }
-  return CheckPassword(password.raw_str(), password.GetLength(), false,
+  return CheckPassword(m_Password.raw_str(), m_Password.GetLength(), false,
                        m_EncryptKey, key_len);
 }
 
@@ -414,7 +413,7 @@ bool CPDF_SecurityHandler::CheckUserPassword(const uint8_t* password,
                                              uint8_t* key,
                                              int32_t key_len) {
   CalcEncryptKey(m_pEncryptDict.Get(), password, pass_size, key, key_len,
-                 bIgnoreEncryptMeta, m_pParser->GetIDArray());
+                 bIgnoreEncryptMeta, m_pIdArray.Get());
   ByteString ukey =
       m_pEncryptDict ? m_pEncryptDict->GetStringFor("U") : ByteString();
   if (ukey.GetLength() < 16) {
@@ -441,9 +440,8 @@ bool CPDF_SecurityHandler::CheckUserPassword(const uint8_t* password,
     CRYPT_md5_context md5;
     CRYPT_MD5Start(&md5);
     CRYPT_MD5Update(&md5, defpasscode, 32);
-    CPDF_Array* pIdArray = m_pParser->GetIDArray();
-    if (pIdArray) {
-      ByteString id = pIdArray->GetStringAt(0);
+    if (m_pIdArray) {
+      ByteString id = m_pIdArray->GetStringAt(0);
       CRYPT_MD5Update(&md5, (uint8_t*)id.c_str(), id.GetLength());
     }
     CRYPT_MD5Finish(&md5, ukeybuf);
diff --git a/core/fpdfapi/parser/cpdf_security_handler.h b/core/fpdfapi/parser/cpdf_security_handler.h
index 656aba0058..8b55fa21a7 100644
--- a/core/fpdfapi/parser/cpdf_security_handler.h
+++ b/core/fpdfapi/parser/cpdf_security_handler.h
@@ -27,7 +27,9 @@ class CPDF_SecurityHandler {
   CPDF_SecurityHandler();
   ~CPDF_SecurityHandler();
 
-  bool OnInit(CPDF_Parser* pParser, CPDF_Dictionary* pEncryptDict);
+  bool OnInit(CPDF_Dictionary* pEncryptDict,
+              const CPDF_Array* pIdArray,
+              const ByteString& password);
   uint32_t GetPermissions();
   bool GetCryptInfo(int& cipher, const uint8_t*& buffer, int& keylen);
   bool IsMetadataEncrypted() const;
@@ -97,8 +99,9 @@ class CPDF_SecurityHandler {
 
   int m_Version;
   int m_Revision;
-  UnownedPtr<CPDF_Parser> m_pParser;
   UnownedPtr<CPDF_Dictionary> m_pEncryptDict;
+  UnownedPtr<const CPDF_Array> m_pIdArray;
+  ByteString m_Password;
   uint32_t m_Permissions;
   int m_Cipher;
   uint8_t m_EncryptKey[32];
-- 
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