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Side by Side Diff: core/fpdfapi/fpdf_parser/cpdf_standard_security_handler.cpp

Issue 1862123003: Rename both As{Byte,Wide}StringC() helpers to AsStringC(). (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@master
Patch Set: Rebase, fix new usage. Created 4 years, 8 months ago
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1 // Copyright 2014 PDFium Authors. All rights reserved. 1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6 6
7 #include "core/fpdfapi/fpdf_parser/cpdf_standard_security_handler.h" 7 #include "core/fpdfapi/fpdf_parser/cpdf_standard_security_handler.h"
8 8
9 #include <time.h> 9 #include <time.h>
10 10
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166 m_Revision = pEncryptDict->GetIntegerBy("R"); 166 m_Revision = pEncryptDict->GetIntegerBy("R");
167 m_Permissions = pEncryptDict->GetIntegerBy("P", -1); 167 m_Permissions = pEncryptDict->GetIntegerBy("P", -1);
168 if (m_Version < 4) { 168 if (m_Version < 4) {
169 return _LoadCryptInfo(pEncryptDict, CFX_ByteStringC(), m_Cipher, m_KeyLen); 169 return _LoadCryptInfo(pEncryptDict, CFX_ByteStringC(), m_Cipher, m_KeyLen);
170 } 170 }
171 CFX_ByteString stmf_name = pEncryptDict->GetStringBy("StmF"); 171 CFX_ByteString stmf_name = pEncryptDict->GetStringBy("StmF");
172 CFX_ByteString strf_name = pEncryptDict->GetStringBy("StrF"); 172 CFX_ByteString strf_name = pEncryptDict->GetStringBy("StrF");
173 if (stmf_name != strf_name) { 173 if (stmf_name != strf_name) {
174 return FALSE; 174 return FALSE;
175 } 175 }
176 if (!_LoadCryptInfo(pEncryptDict, strf_name.AsByteStringC(), m_Cipher, 176 if (!_LoadCryptInfo(pEncryptDict, strf_name.AsStringC(), m_Cipher,
177 m_KeyLen)) { 177 m_KeyLen)) {
178 return FALSE; 178 return FALSE;
179 } 179 }
180 return TRUE; 180 return TRUE;
181 } 181 }
182 182
183 FX_BOOL CPDF_StandardSecurityHandler::LoadDict(CPDF_Dictionary* pEncryptDict, 183 FX_BOOL CPDF_StandardSecurityHandler::LoadDict(CPDF_Dictionary* pEncryptDict,
184 uint32_t type, 184 uint32_t type,
185 int& cipher, 185 int& cipher,
186 int& key_len) { 186 int& key_len) {
187 m_pEncryptDict = pEncryptDict; 187 m_pEncryptDict = pEncryptDict;
188 m_Version = pEncryptDict->GetIntegerBy("V"); 188 m_Version = pEncryptDict->GetIntegerBy("V");
189 m_Revision = pEncryptDict->GetIntegerBy("R"); 189 m_Revision = pEncryptDict->GetIntegerBy("R");
190 m_Permissions = pEncryptDict->GetIntegerBy("P", -1); 190 m_Permissions = pEncryptDict->GetIntegerBy("P", -1);
191 CFX_ByteString strf_name, stmf_name; 191 CFX_ByteString strf_name, stmf_name;
192 if (m_Version >= 4) { 192 if (m_Version >= 4) {
193 stmf_name = pEncryptDict->GetStringBy("StmF"); 193 stmf_name = pEncryptDict->GetStringBy("StmF");
194 strf_name = pEncryptDict->GetStringBy("StrF"); 194 strf_name = pEncryptDict->GetStringBy("StrF");
195 if (stmf_name != strf_name) { 195 if (stmf_name != strf_name) {
196 return FALSE; 196 return FALSE;
197 } 197 }
198 } 198 }
199 if (!_LoadCryptInfo(pEncryptDict, strf_name.AsByteStringC(), cipher, 199 if (!_LoadCryptInfo(pEncryptDict, strf_name.AsStringC(), cipher, key_len)) {
200 key_len)) {
201 return FALSE; 200 return FALSE;
202 } 201 }
203 m_Cipher = cipher; 202 m_Cipher = cipher;
204 m_KeyLen = key_len; 203 m_KeyLen = key_len;
205 return TRUE; 204 return TRUE;
206 } 205 }
207 206
208 FX_BOOL CPDF_StandardSecurityHandler::GetCryptInfo(int& cipher, 207 FX_BOOL CPDF_StandardSecurityHandler::GetCryptInfo(int& cipher,
209 const uint8_t*& buffer, 208 const uint8_t*& buffer,
210 int& keylen) { 209 int& keylen) {
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707 buf[11] = 'b'; 706 buf[11] = 'b';
708 uint8_t* aes = FX_Alloc(uint8_t, 2048); 707 uint8_t* aes = FX_Alloc(uint8_t, 2048);
709 CRYPT_AESSetKey(aes, 16, key, 32, TRUE); 708 CRYPT_AESSetKey(aes, 16, key, 32, TRUE);
710 uint8_t iv[16], buf1[16]; 709 uint8_t iv[16], buf1[16];
711 FXSYS_memset(iv, 0, 16); 710 FXSYS_memset(iv, 0, 16);
712 CRYPT_AESSetIV(aes, iv); 711 CRYPT_AESSetIV(aes, iv);
713 CRYPT_AESEncrypt(aes, buf1, buf, 16); 712 CRYPT_AESEncrypt(aes, buf1, buf, 16);
714 FX_Free(aes); 713 FX_Free(aes);
715 pEncryptDict->SetAtString("Perms", CFX_ByteString(buf1, 16)); 714 pEncryptDict->SetAtString("Perms", CFX_ByteString(buf1, 16));
716 } 715 }
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