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
|
/***************************************************************************
* Copyright (c) 2009-2010 Open Information Security Foundation
* Copyright (c) 2010-2013 Qualys, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of the Qualys, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
***************************************************************************/
/**
* @file
* @author Ivan Ristic <ivanr@webkreator.com>
*/
#include "htp_config_auto.h"
#include "htp_private.h"
/**
* Transcode all parameters supplied in the table.
*
* @param[in] connp
* @param[in] params
* @param[in] destroy_old
*/
int htp_transcode_params(htp_connp_t *connp, htp_table_t **params, int destroy_old) {
htp_table_t *input_params = *params;
// No transcoding unless necessary
if ((connp->cfg->internal_encoding == NULL)||(connp->cfg->request_encoding == NULL)) return HTP_OK;
// Create a new table that will hold transcoded parameters
htp_table_t *output_params = htp_table_create(htp_table_size(input_params));
if (output_params == NULL) return HTP_ERROR;
// Initialize iconv
iconv_t cd = iconv_open(connp->cfg->internal_encoding, connp->cfg->request_encoding);
if (cd == (iconv_t) -1) {
htp_table_destroy(output_params);
return HTP_ERROR;
}
#if (_LIBICONV_VERSION >= 0x0108 && HAVE_ICONVCTL)
int iconv_param = 0;
iconvctl(cd, ICONV_SET_TRANSLITERATE, &iconv_param);
iconv_param = 1;
iconvctl(cd, ICONV_SET_DISCARD_ILSEQ, &iconv_param);
#endif
// Convert the parameters, one by one
bstr *name = NULL;
bstr *value = NULL;
for (size_t i = 0, n = htp_table_size(input_params); i < n; i++) {
value = htp_table_get_index(input_params, i, &name);
bstr *new_name = NULL, *new_value = NULL;
// Convert name
htp_transcode_bstr(cd, name, &new_name);
if (new_name == NULL) {
iconv_close(cd);
bstr *b = NULL;
for (size_t j = 0, k = htp_table_size(output_params); j < k; j++) {
b = htp_table_get_index(output_params, j, NULL);
bstr_free(b);
}
htp_table_destroy(output_params);
return HTP_ERROR;
}
// Convert value
htp_transcode_bstr(cd, value, &new_value);
if (new_value == NULL) {
bstr_free(new_name);
iconv_close(cd);
bstr *b = NULL;
for (size_t j = 0, k = htp_table_size(output_params); j < k; j++) {
b = htp_table_get_index(output_params, j, NULL);
bstr_free(b);
}
htp_table_destroy(output_params);
return HTP_ERROR;
}
// Add to new table
htp_table_addn(output_params, new_name, new_value);
}
// Replace the old parameter table
*params = output_params;
// Destroy the old parameter table if necessary
if (destroy_old) {
bstr *b = NULL;
for (size_t i = 0, n = htp_table_size(input_params); i < n; i++) {
b = htp_table_get_index(input_params, i, NULL);
bstr_free(b);
}
htp_table_destroy(input_params);
}
iconv_close(cd);
return HTP_OK;
}
/**
* Transcode one bstr.
*
* @param[in] cd
* @param[in] input
* @param[in] output
*/
int htp_transcode_bstr(iconv_t cd, bstr *input, bstr **output) {
// Reset conversion state for every new string
iconv(cd, NULL, 0, NULL, 0);
bstr_builder_t *bb = NULL;
const size_t buflen = 10;
unsigned char *buf = malloc(buflen);
if (buf == NULL) {
return HTP_ERROR;
}
const char *inbuf = (const char *)bstr_ptr(input);
size_t inleft = bstr_len(input);
char *outbuf = (char *)buf;
size_t outleft = buflen;
int loop = 1;
while (loop) {
loop = 0;
if (iconv(cd, (ICONV_CONST char **)&inbuf, &inleft, (char **)&outbuf, &outleft) == (size_t) - 1) {
if (errno == E2BIG) {
// Create bstr builder on-demand
if (bb == NULL) {
bb = bstr_builder_create();
if (bb == NULL) {
free(buf);
return HTP_ERROR;
}
}
// The output buffer is full
bstr_builder_append_mem(bb, buf, buflen - outleft);
outbuf = (char *)buf;
outleft = buflen;
// Continue in the loop, as there's more work to do
loop = 1;
} else {
// Error
if (bb != NULL) bstr_builder_destroy(bb);
free(buf);
return HTP_ERROR;
}
}
}
if (bb != NULL) {
bstr_builder_append_mem(bb, buf, buflen - outleft);
*output = bstr_builder_to_str(bb);
bstr_builder_destroy(bb);
if (*output == NULL) {
free(buf);
return HTP_ERROR;
}
} else {
*output = bstr_dup_mem(buf, buflen - outleft);
if (*output == NULL) {
free(buf);
return HTP_ERROR;
}
}
free(buf);
return HTP_OK;
}
|
