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
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
|
/*
Unix SMB/CIFS implementation.
libndr compression support
Copyright (C) Stefan Metzmacher 2005
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "../compression/mszip.h"
#include "librpc/ndr/libndr.h"
#include "librpc/ndr/ndr_compression.h"
static enum ndr_err_code ndr_pull_compression_mszip_chunk(struct ndr_pull *ndrpull,
struct ndr_push *ndrpush,
struct decomp_state *decomp_state,
bool *last)
{
DATA_BLOB comp_chunk;
uint32_t comp_chunk_offset;
uint32_t comp_chunk_size;
DATA_BLOB plain_chunk;
uint32_t plain_chunk_offset;
uint32_t plain_chunk_size;
int ret;
NDR_CHECK(ndr_pull_uint32(ndrpull, NDR_SCALARS, &plain_chunk_size));
if (plain_chunk_size > 0x00008000) {
return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION, "Bad MSZIP plain chunk size %08X > 0x00008000 (PULL)",
plain_chunk_size);
}
NDR_CHECK(ndr_pull_uint32(ndrpull, NDR_SCALARS, &comp_chunk_size));
DEBUG(10,("MSZIP plain_chunk_size: %08X (%u) comp_chunk_size: %08X (%u)\n",
plain_chunk_size, plain_chunk_size, comp_chunk_size, comp_chunk_size));
comp_chunk_offset = ndrpull->offset;
NDR_CHECK(ndr_pull_advance(ndrpull, comp_chunk_size));
comp_chunk.length = comp_chunk_size;
comp_chunk.data = ndrpull->data + comp_chunk_offset;
plain_chunk_offset = ndrpush->offset;
NDR_CHECK(ndr_push_zero(ndrpush, plain_chunk_size));
plain_chunk.length = plain_chunk_size;
plain_chunk.data = ndrpush->data + plain_chunk_offset;
ret = ZIPdecompress(decomp_state, &comp_chunk, &plain_chunk);
if (ret != DECR_OK) {
return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION, "Bad ZIPdecompress() error %d (PULL)",
ret);
}
if ((plain_chunk_size < 0x00008000) || (ndrpull->offset+4 >= ndrpull->data_size)) {
/* this is the last chunk */
*last = true;
}
return NDR_ERR_SUCCESS;
}
static enum ndr_err_code ndr_pull_compression_mszip(struct ndr_pull *subndr,
struct ndr_pull **_comndr,
ssize_t decompressed_len)
{
struct ndr_push *ndrpush;
struct ndr_pull *comndr;
DATA_BLOB uncompressed;
uint32_t payload_header[4];
uint32_t payload_size;
uint32_t payload_offset;
uint8_t *payload;
struct decomp_state *decomp_state;
bool last = false;
ndrpush = ndr_push_init_ctx(subndr);
NDR_ERR_HAVE_NO_MEMORY(ndrpush);
decomp_state = ZIPdecomp_state(subndr);
NDR_ERR_HAVE_NO_MEMORY(decomp_state);
while (!last) {
NDR_CHECK(ndr_pull_compression_mszip_chunk(subndr, ndrpush, decomp_state, &last));
}
uncompressed = ndr_push_blob(ndrpush);
if (uncompressed.length != decompressed_len) {
return ndr_pull_error(subndr, NDR_ERR_COMPRESSION, "Bad MSZIP uncompressed_len [%u] != [%d] (PULL)",
(int)uncompressed.length, (int)decompressed_len);
}
comndr = talloc_zero(subndr, struct ndr_pull);
NDR_ERR_HAVE_NO_MEMORY(comndr);
comndr->flags = subndr->flags;
comndr->current_mem_ctx = subndr->current_mem_ctx;
comndr->data = uncompressed.data;
comndr->data_size = uncompressed.length;
comndr->offset = 0;
NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[0]));
NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[1]));
NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[2]));
NDR_CHECK(ndr_pull_uint32(comndr, NDR_SCALARS, &payload_header[3]));
if (payload_header[0] != 0x00081001) {
return ndr_pull_error(subndr, NDR_ERR_COMPRESSION, "Bad MSZIP payload_header[0] [0x%08X] != [0x00081001] (PULL)",
payload_header[0]);
}
if (payload_header[1] != 0xCCCCCCCC) {
return ndr_pull_error(subndr, NDR_ERR_COMPRESSION, "Bad MSZIP payload_header[1] [0x%08X] != [0xCCCCCCCC] (PULL)",
payload_header[1]);
}
payload_size = payload_header[2];
if (payload_header[3] != 0x00000000) {
return ndr_pull_error(subndr, NDR_ERR_COMPRESSION, "Bad MSZIP payload_header[3] [0x%08X] != [0x00000000] (PULL)",
payload_header[3]);
}
payload_offset = comndr->offset;
NDR_CHECK(ndr_pull_advance(comndr, payload_size));
payload = comndr->data + payload_offset;
comndr->data = payload;
comndr->data_size = payload_size;
comndr->offset = 0;
*_comndr = comndr;
return NDR_ERR_SUCCESS;
}
static enum ndr_err_code ndr_push_compression_mszip(struct ndr_push *subndr,
struct ndr_push *comndr)
{
return ndr_push_error(subndr, NDR_ERR_COMPRESSION, "Sorry MSZIP compression is not supported yet (PUSH)");
}
static enum ndr_err_code ndr_pull_compression_xpress_chunk(struct ndr_pull *ndrpull,
struct ndr_push *ndrpush,
bool *last)
{
DATA_BLOB comp_chunk;
uint32_t comp_chunk_offset;
uint32_t comp_chunk_size;
uint32_t plain_chunk_size;
comp_chunk_offset = ndrpull->offset;
NDR_CHECK(ndr_pull_uint32(ndrpull, NDR_SCALARS, &plain_chunk_size));
if (plain_chunk_size > 0x00010000) {
return ndr_pull_error(ndrpull, NDR_ERR_COMPRESSION, "Bad XPRESS plain chunk size %08X > 0x00010000 (PULL)",
plain_chunk_size);
}
NDR_CHECK(ndr_pull_uint32(ndrpull, NDR_SCALARS, &comp_chunk_size));
NDR_CHECK(ndr_pull_advance(ndrpull, comp_chunk_size));
comp_chunk.length = comp_chunk_size + 8;
comp_chunk.data = ndrpull->data + comp_chunk_offset;
DEBUG(10,("XPRESS plain_chunk_size: %08X (%u) comp_chunk_size: %08X (%u)\n",
plain_chunk_size, plain_chunk_size, comp_chunk_size, comp_chunk_size));
/* For now, we just copy over the compressed blob */
NDR_CHECK(ndr_push_bytes(ndrpush, comp_chunk.data, comp_chunk.length));
if ((plain_chunk_size < 0x00010000) || (ndrpull->offset+4 >= ndrpull->data_size)) {
/* this is the last chunk */
*last = true;
}
return NDR_ERR_SUCCESS;
}
static enum ndr_err_code ndr_pull_compression_xpress(struct ndr_pull *subndr,
struct ndr_pull **_comndr,
ssize_t decompressed_len)
{
struct ndr_push *ndrpush;
struct ndr_pull *comndr;
DATA_BLOB uncompressed;
bool last = false;
ndrpush = ndr_push_init_ctx(subndr);
NDR_ERR_HAVE_NO_MEMORY(ndrpush);
while (!last) {
NDR_CHECK(ndr_pull_compression_xpress_chunk(subndr, ndrpush, &last));
}
uncompressed = ndr_push_blob(ndrpush);
comndr = talloc_zero(subndr, struct ndr_pull);
NDR_ERR_HAVE_NO_MEMORY(comndr);
comndr->flags = subndr->flags;
comndr->current_mem_ctx = subndr->current_mem_ctx;
comndr->data = uncompressed.data;
comndr->data_size = uncompressed.length;
comndr->offset = 0;
*_comndr = comndr;
return NDR_ERR_SUCCESS;
}
static enum ndr_err_code ndr_push_compression_xpress(struct ndr_push *subndr,
struct ndr_push *comndr)
{
return ndr_push_error(subndr, NDR_ERR_COMPRESSION, "XPRESS compression is not supported yet (PUSH)");
}
/*
handle compressed subcontext buffers, which in midl land are user-marshalled, but
we use magic in pidl to make them easier to cope with
*/
enum ndr_err_code ndr_pull_compression_start(struct ndr_pull *subndr,
struct ndr_pull **_comndr,
enum ndr_compression_alg compression_alg,
ssize_t decompressed_len)
{
switch (compression_alg) {
case NDR_COMPRESSION_MSZIP:
return ndr_pull_compression_mszip(subndr, _comndr, decompressed_len);
case NDR_COMPRESSION_XPRESS:
return ndr_pull_compression_xpress(subndr, _comndr, decompressed_len);
default:
return ndr_pull_error(subndr, NDR_ERR_COMPRESSION, "Bad compression algorithm %d (PULL)",
compression_alg);
}
return NDR_ERR_SUCCESS;
}
enum ndr_err_code ndr_pull_compression_end(struct ndr_pull *subndr,
struct ndr_pull *comndr,
enum ndr_compression_alg compression_alg,
ssize_t decompressed_len)
{
return NDR_ERR_SUCCESS;
}
/*
push a compressed subcontext
*/
enum ndr_err_code ndr_push_compression_start(struct ndr_push *subndr,
struct ndr_push **_comndr,
enum ndr_compression_alg compression_alg,
ssize_t decompressed_len)
{
struct ndr_push *comndr;
comndr = ndr_push_init_ctx(subndr);
NDR_ERR_HAVE_NO_MEMORY(comndr);
comndr->flags = subndr->flags;
*_comndr = comndr;
return NDR_ERR_SUCCESS;
}
/*
push a compressed subcontext
*/
enum ndr_err_code ndr_push_compression_end(struct ndr_push *subndr,
struct ndr_push *comndr,
enum ndr_compression_alg compression_alg,
ssize_t decompressed_len)
{
switch (compression_alg) {
case NDR_COMPRESSION_MSZIP:
return ndr_push_compression_mszip(subndr, comndr);
case NDR_COMPRESSION_XPRESS:
return ndr_push_compression_xpress(subndr, comndr);
default:
return ndr_push_error(subndr, NDR_ERR_COMPRESSION, "Bad compression algorithm %d (PUSH)",
compression_alg);
}
return NDR_ERR_SUCCESS;
}
|
