1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
// The following code is based on unshield
// Original copyright:
// Copyright (c) 2003 David Eriksson <twogood@users.sourceforge.net>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
// of the Software, and to permit persons to whom the Software is furnished to do
// so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include "common/archive.h"
#include "common/debug.h"
#include "common/hash-str.h"
#include "common/installshield_cab.h"
#include "common/memstream.h"
#include "common/zlib.h"
namespace Common {
class InstallShieldCabinet : public Archive {
public:
InstallShieldCabinet(SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse);
~InstallShieldCabinet();
// Archive API implementation
bool hasFile(const String &name) const;
int listMembers(ArchiveMemberList &list) const;
const ArchiveMemberPtr getMember(const String &name) const;
SeekableReadStream *createReadStreamForMember(const String &name) const;
private:
struct FileEntry {
uint32 uncompressedSize;
uint32 compressedSize;
uint32 offset;
uint16 flags;
};
typedef HashMap<String, FileEntry, IgnoreCase_Hash, IgnoreCase_EqualTo> FileMap;
FileMap _map;
Common::SeekableReadStream *_stream;
DisposeAfterUse::Flag _disposeAfterUse;
};
InstallShieldCabinet::~InstallShieldCabinet() {
_map.clear();
if (_disposeAfterUse == DisposeAfterUse::YES)
delete _stream;
}
InstallShieldCabinet::InstallShieldCabinet(SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse) : _stream(stream), _disposeAfterUse(disposeAfterUse) {
// Note that we only support a limited subset of cabinet files
// Only single cabinet files and ones without data shared between
// cabinets.
// Check for the magic uint32
if (_stream->readUint32LE() != 0x28635349) {
warning("InstallShieldCabinet::InstallShieldCabinet(): Magic ID doesn't match");
return;
}
uint32 version = _stream->readUint32LE();
if (version != 0x01000004) {
warning("Unsupported CAB version %08x", version);
return;
}
/* uint32 volumeInfo = */ _stream->readUint32LE();
uint32 cabDescriptorOffset = _stream->readUint32LE();
/* uint32 cabDescriptorSize = */ _stream->readUint32LE();
_stream->seek(cabDescriptorOffset);
_stream->skip(12);
uint32 fileTableOffset = _stream->readUint32LE();
_stream->skip(4);
uint32 fileTableSize = _stream->readUint32LE();
uint32 fileTableSize2 = _stream->readUint32LE();
uint32 directoryCount = _stream->readUint32LE();
_stream->skip(8);
uint32 fileCount = _stream->readUint32LE();
if (fileTableSize != fileTableSize2)
warning("file table sizes do not match");
// We're ignoring file groups and components since we
// should not need them. Moving on to the files...
_stream->seek(cabDescriptorOffset + fileTableOffset);
uint32 fileTableCount = directoryCount + fileCount;
uint32 *fileTableOffsets = new uint32[fileTableCount];
for (uint32 i = 0; i < fileTableCount; i++)
fileTableOffsets[i] = _stream->readUint32LE();
for (uint32 i = directoryCount; i < fileCount + directoryCount; i++) {
_stream->seek(cabDescriptorOffset + fileTableOffset + fileTableOffsets[i]);
uint32 nameOffset = _stream->readUint32LE();
/* uint32 directoryIndex = */ _stream->readUint32LE();
// First read in data needed by us to get at the file data
FileEntry entry;
entry.flags = _stream->readUint16LE();
entry.uncompressedSize = _stream->readUint32LE();
entry.compressedSize = _stream->readUint32LE();
_stream->skip(20);
entry.offset = _stream->readUint32LE();
// Then let's get the string
_stream->seek(cabDescriptorOffset + fileTableOffset + nameOffset);
String fileName;
char c = _stream->readByte();
while (c) {
fileName += c;
c = _stream->readByte();
}
_map[fileName] = entry;
}
delete[] fileTableOffsets;
}
bool InstallShieldCabinet::hasFile(const String &name) const {
return _map.contains(name);
}
int InstallShieldCabinet::listMembers(ArchiveMemberList &list) const {
for (FileMap::const_iterator it = _map.begin(); it != _map.end(); it++)
list.push_back(getMember(it->_key));
return _map.size();
}
const ArchiveMemberPtr InstallShieldCabinet::getMember(const String &name) const {
return ArchiveMemberPtr(new GenericArchiveMember(name, this));
}
SeekableReadStream *InstallShieldCabinet::createReadStreamForMember(const String &name) const {
if (!_map.contains(name))
return nullptr;
const FileEntry &entry = _map[name];
_stream->seek(entry.offset);
if (!(entry.flags & 0x04)) // Not compressed
return _stream->readStream(entry.uncompressedSize);
#ifdef USE_ZLIB
byte *src = (byte *)malloc(entry.compressedSize);
byte *dst = (byte *)malloc(entry.uncompressedSize);
_stream->read(src, entry.compressedSize);
bool result = inflateZlibInstallShield(dst, entry.uncompressedSize, src, entry.compressedSize);
free(src);
if (!result) {
warning("failed to inflate CAB file '%s'", name.c_str());
free(dst);
return nullptr;
}
return new MemoryReadStream(dst, entry.uncompressedSize, DisposeAfterUse::YES);
#else
warning("zlib required to extract compressed CAB file '%s'", name.c_str());
return 0;
#endif
}
Archive *makeInstallShieldArchive(SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse) {
return new InstallShieldCabinet(stream, disposeAfterUse);
}
} // End of namespace AGOS
|
