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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_UTILITY_IMPORTER_NSS_DECRYPTOR_WIN_H_
      6 #define CHROME_UTILITY_IMPORTER_NSS_DECRYPTOR_WIN_H_
      7 
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "base/basictypes.h"
     12 #include "base/native_library.h"
     13 #include "base/strings/string16.h"
     14 
     15 // The following declarations of functions and types are from Firefox
     16 // NSS library.
     17 // source code:
     18 //   security/nss/lib/util/seccomon.h
     19 //   security/nss/lib/nss/nss.h
     20 // The license block is:
     21 
     22 /* ***** BEGIN LICENSE BLOCK *****
     23 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
     24 *
     25 * The contents of this file are subject to the Mozilla Public License Version
     26 * 1.1 (the "License"); you may not use this file except in compliance with
     27 * the License. You may obtain a copy of the License at
     28 * http://www.mozilla.org/MPL/
     29 *
     30 * Software distributed under the License is distributed on an "AS IS" basis,
     31 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
     32 * for the specific language governing rights and limitations under the
     33 * License.
     34 *
     35 * The Original Code is the Netscape security libraries.
     36 *
     37 * The Initial Developer of the Original Code is
     38 * Netscape Communications Corporation.
     39 * Portions created by the Initial Developer are Copyright (C) 1994-2000
     40 * the Initial Developer. All Rights Reserved.
     41 *
     42 * Contributor(s):
     43 *
     44 * Alternatively, the contents of this file may be used under the terms of
     45 * either the GNU General Public License Version 2 or later (the "GPL"), or
     46 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
     47 * in which case the provisions of the GPL or the LGPL are applicable instead
     48 * of those above. If you wish to allow use of your version of this file only
     49 * under the terms of either the GPL or the LGPL, and not to allow others to
     50 * use your version of this file under the terms of the MPL, indicate your
     51 * decision by deleting the provisions above and replace them with the notice
     52 * and other provisions required by the GPL or the LGPL. If you do not delete
     53 * the provisions above, a recipient may use your version of this file under
     54 * the terms of any one of the MPL, the GPL or the LGPL.
     55 *
     56 * ***** END LICENSE BLOCK ***** */
     57 
     58 enum SECItemType {
     59   siBuffer = 0,
     60   siClearDataBuffer = 1,
     61   siCipherDataBuffer = 2,
     62   siDERCertBuffer = 3,
     63   siEncodedCertBuffer = 4,
     64   siDERNameBuffer = 5,
     65   siEncodedNameBuffer = 6,
     66   siAsciiNameString = 7,
     67   siAsciiString = 8,
     68   siDEROID = 9,
     69   siUnsignedInteger = 10,
     70   siUTCTime = 11,
     71   siGeneralizedTime = 12
     72 };
     73 
     74 struct SECItem {
     75   SECItemType type;
     76   unsigned char *data;
     77   unsigned int len;
     78 };
     79 
     80 enum SECStatus {
     81   SECWouldBlock = -2,
     82   SECFailure = -1,
     83   SECSuccess = 0
     84 };
     85 
     86 typedef int PRBool;
     87 #define PR_TRUE 1
     88 #define PR_FALSE 0
     89 
     90 typedef enum { PR_FAILURE = -1, PR_SUCCESS = 0 } PRStatus;
     91 
     92 typedef struct PK11SlotInfoStr PK11SlotInfo;
     93 
     94 typedef SECStatus (*NSSInitFunc)(const char *configdir);
     95 typedef SECStatus (*NSSShutdownFunc)(void);
     96 typedef PK11SlotInfo* (*PK11GetInternalKeySlotFunc)(void);
     97 typedef void (*PK11FreeSlotFunc)(PK11SlotInfo *slot);
     98 typedef SECStatus (*PK11CheckUserPasswordFunc)(PK11SlotInfo *slot, char *pw);
     99 typedef SECStatus
    100     (*PK11AuthenticateFunc)(PK11SlotInfo *slot, PRBool loadCerts, void *wincx);
    101 typedef SECStatus
    102     (*PK11SDRDecryptFunc)(SECItem *data, SECItem *result, void *cx);
    103 typedef void (*SECITEMFreeItemFunc)(SECItem *item, PRBool free_it);
    104 typedef void (*PLArenaFinishFunc)(void);
    105 typedef PRStatus (*PRCleanupFunc)(void);
    106 
    107 namespace autofill {
    108 struct PasswordForm;
    109 }
    110 
    111 // A wrapper for Firefox NSS decrypt component.
    112 class NSSDecryptor {
    113  public:
    114   NSSDecryptor();
    115   ~NSSDecryptor();
    116 
    117   // Loads NSS3 library and returns true if successful.
    118   // |dll_path| indicates the location of NSS3 DLL files, and |db_path|
    119   // is the location of the database file that stores the keys.
    120   bool Init(const base::FilePath& dll_path, const base::FilePath& db_path);
    121 
    122   // Frees the libraries.
    123   void Free();
    124 
    125   // Decrypts Firefox stored passwords. Before using this method,
    126   // make sure Init() returns true.
    127   base::string16 Decrypt(const std::string& crypt) const;
    128 
    129   // Parses the Firefox password file content, decrypts the
    130   // username/password and reads other related information.
    131   // The result will be stored in |forms|.
    132   void ParseSignons(const std::string& content,
    133                     std::vector<autofill::PasswordForm>* forms);
    134 
    135   // Reads and parses the Firefox password sqlite db, decrypts the
    136   // username/password and reads other related information.
    137   // The result will be stored in |forms|.
    138   bool ReadAndParseSignons(const base::FilePath& sqlite_file,
    139                            std::vector<autofill::PasswordForm>* forms);
    140 
    141  private:
    142   // Call NSS initialization funcs.
    143   bool InitNSS(const base::FilePath& db_path,
    144                base::NativeLibrary plds4_dll,
    145                base::NativeLibrary nspr4_dll);
    146 
    147   PK11SlotInfo* GetKeySlotForDB() const { return PK11_GetInternalKeySlot(); }
    148   void FreeSlot(PK11SlotInfo* slot) const { PK11_FreeSlot(slot); }
    149 
    150   // Methods in Firefox security components.
    151   NSSInitFunc NSS_Init;
    152   NSSShutdownFunc NSS_Shutdown;
    153   PK11GetInternalKeySlotFunc PK11_GetInternalKeySlot;
    154   PK11CheckUserPasswordFunc PK11_CheckUserPassword;
    155   PK11FreeSlotFunc PK11_FreeSlot;
    156   PK11AuthenticateFunc PK11_Authenticate;
    157   PK11SDRDecryptFunc PK11SDR_Decrypt;
    158   SECITEMFreeItemFunc SECITEM_FreeItem;
    159   PLArenaFinishFunc PL_ArenaFinish;
    160   PRCleanupFunc PR_Cleanup;
    161 
    162   // Libraries necessary for decrypting the passwords.
    163   static const wchar_t kNSS3Library[];
    164   static const wchar_t kSoftokn3Library[];
    165   static const wchar_t kPLDS4Library[];
    166   static const wchar_t kNSPR4Library[];
    167 
    168   // NSS3 module handles.
    169   base::NativeLibrary nss3_dll_;
    170   base::NativeLibrary softokn3_dll_;
    171 
    172   // True if NSS_Init() has been called
    173   bool is_nss_initialized_;
    174 
    175   DISALLOW_COPY_AND_ASSIGN(NSSDecryptor);
    176 };
    177 
    178 #endif  // CHROME_UTILITY_IMPORTER_NSS_DECRYPTOR_WIN_H_
    179