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Member "encfs-1.9.5/encfs/FSConfig.h" (27 Apr 2018, 3763 Bytes) of package /linux/misc/encfs-1.9.5.tar.gz:

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    1 /*****************************************************************************
    2  * Author:   Valient Gough <vgough@pobox.com>
    3  *
    4  *****************************************************************************
    5  * Copyright (c) 2010 Valient Gough
    6  *
    7  * This program is free software: you can redistribute it and/or modify it
    8  * under the terms of the GNU Lesser General Public License as published by the
    9  * Free Software Foundation, either version 3 of the License, or (at your
   10  * option) any later version.
   11  *
   12  * This program is distributed in the hope that it will be useful, but WITHOUT
   13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
   15  * for more details.
   16  *
   17  * You should have received a copy of the GNU Lesser General Public License
   18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   19  */
   20 
   21 #ifndef _FSConfig_incl_
   22 #define _FSConfig_incl_
   23 
   24 #include <memory>
   25 #include <string>
   26 #include <vector>
   27 
   28 #include "CipherKey.h"
   29 #include "Interface.h"
   30 #include "encfs.h"
   31 
   32 namespace encfs {
   33 
   34 enum ConfigType {
   35   Config_None = 0,
   36   Config_Prehistoric,
   37   Config_V3,
   38   Config_V4,
   39   Config_V5,
   40   Config_V6
   41 };
   42 
   43 struct EncFS_Opts;
   44 class Cipher;
   45 class NameIO;
   46 
   47 /**
   48  * Persistent configuration (stored in config file .encfs6.xml)
   49  */
   50 struct EncFSConfig {
   51   ConfigType cfgType;
   52 
   53   std::string creator;
   54   int subVersion;
   55 
   56   // interface of cipher
   57   Interface cipherIface;
   58   // interface used for file name coding
   59   Interface nameIface;
   60 
   61   int keySize;    // reported in bits
   62   int blockSize;  // reported in bytes
   63 
   64   std::vector<unsigned char> keyData;
   65   std::vector<unsigned char> salt;
   66 
   67   int kdfIterations;
   68   long desiredKDFDuration;
   69 
   70   bool plainData;         // do not encrypt file content
   71 
   72   int blockMACBytes;      // MAC headers on blocks..
   73   int blockMACRandBytes;  // number of random bytes in the block header
   74 
   75   bool uniqueIV;            // per-file Initialization Vector
   76   bool externalIVChaining;  // IV seeding by filename IV chaining
   77 
   78   bool chainedNameIV;  // filename IV chaining
   79   bool allowHoles;     // allow holes in files (implicit zero blocks)
   80 
   81   EncFSConfig() : keyData(), salt() {
   82     cfgType = Config_None;
   83     subVersion = 0;
   84     plainData = false;
   85     blockMACBytes = 0;
   86     blockMACRandBytes = 0;
   87     uniqueIV = false;
   88     externalIVChaining = false;
   89     chainedNameIV = false;
   90     allowHoles = false;
   91 
   92     kdfIterations = 0;
   93     desiredKDFDuration = 500;
   94   }
   95 
   96   CipherKey getUserKey(bool useStdin);
   97   CipherKey getUserKey(const std::string &passwordProgram,
   98                        const std::string &rootDir);
   99   CipherKey getNewUserKey();
  100 
  101   std::shared_ptr<Cipher> getCipher() const;
  102 
  103   // deprecated
  104   void assignKeyData(const std::string &in);
  105   void assignKeyData(unsigned char *data, int length);
  106   void assignSaltData(unsigned char *data, int length);
  107 
  108   unsigned char *getKeyData() const;
  109   unsigned char *getSaltData() const;
  110 
  111  private:
  112   CipherKey makeKey(const char *password, int passwdLen);
  113 };
  114 
  115 // helpers for serializing to/from a stream
  116 std::ostream &operator<<(std::ostream &os, const EncFSConfig &cfg);
  117 std::istream &operator>>(std::istream &os, EncFSConfig &cfg);
  118 
  119 struct FSConfig {
  120   std::shared_ptr<EncFSConfig> config;
  121   std::shared_ptr<EncFS_Opts> opts;
  122 
  123   std::shared_ptr<Cipher> cipher;
  124   CipherKey key;
  125   std::shared_ptr<NameIO> nameCoding;
  126 
  127   bool forceDecode;        // force decode on MAC block failures
  128   bool reverseEncryption;  // reverse encryption operation
  129 
  130   bool idleTracking;  // turn on idle monitoring of filesystem
  131 
  132   FSConfig()
  133       : forceDecode(false), reverseEncryption(false), idleTracking(false) {}
  134 };
  135 
  136 using FSConfigPtr = std::shared_ptr<FSConfig>;
  137 
  138 }  // namespace encfs
  139 
  140 #endif