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
|
diff --git a/logging.c b/logging.c
index 9e86808..613ff4b 100644
--- a/logging.c
+++ b/logging.c
@@ -171,7 +171,14 @@ vsf_log_do_log_to_file(int fd, struct mystr* p_str)
return;
}
}
- str_replace_unprintable(p_str, '?');
+ if (tunable_wc_logs_enable)
+ {
+ str_replace_unprintable_with_hex_wc(p_str);
+ }
+ else
+ {
+ str_replace_unprintable_with_hex(p_str);
+ }
str_append_char(p_str, '\n');
/* Ignore write failure; maybe the disk filled etc. */
(void) str_write_loop(p_str, fd);
diff --git a/parseconf.c b/parseconf.c
index 3cfe7da..3729818 100644
--- a/parseconf.c
+++ b/parseconf.c
@@ -113,6 +113,7 @@ parseconf_bool_array[] =
{ "allow_writeable_chroot", &tunable_allow_writeable_chroot },
{ "better_stou", &tunable_better_stou },
{ "log_die", &tunable_log_die },
+ { "wc_logs_enable", &tunable_wc_logs_enable },
{ 0, 0 }
};
diff --git a/str.c b/str.c
index 82b8ae4..c03e7d8 100644
--- a/str.c
+++ b/str.c
@@ -20,6 +20,11 @@
#include "utility.h"
#include "sysutil.h"
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+#include <wctype.h>
+
/* File local functions */
static void str_split_text_common(struct mystr* p_src, struct mystr* p_rhs,
const char* p_text, int is_reverse);
@@ -723,6 +728,102 @@ str_replace_unprintable(struct mystr* p_str, char new_char)
}
}
+void
+str_replace_unprintable_with_hex(struct mystr* p_str)
+{
+ unsigned int ups_size = sizeof(unsigned int) * (p_str->len);
+ if (ups_size < p_str->len)
+ {
+ str_replace_unprintable(p_str, '?');
+ str_append_text(p_str, ": BUG: string is too long");
+ bug(p_str->p_buf);
+ }
+ unsigned int* ups = vsf_sysutil_malloc(ups_size);
+ unsigned int up_count = 0;
+ for (unsigned int i=0; i < p_str->len; i++)
+ {
+ if (!vsf_sysutil_isprint(p_str->p_buf[i]))
+ {
+ ups[up_count++] = i;
+ }
+ }
+ str_replace_positions_with_hex(p_str, ups, up_count);
+ vsf_sysutil_free(ups);
+}
+
+void str_replace_unprintable_with_hex_wc(struct mystr* p_str)
+{
+ unsigned int ups_size = sizeof(unsigned int) * (p_str->len);
+ if (ups_size < p_str->len)
+ {
+ str_replace_unprintable(p_str, '?');
+ str_append_text(p_str, ": BUG: string is too long");
+ bug(p_str->p_buf);
+ }
+ unsigned int* ups = vsf_sysutil_malloc(ups_size);
+ unsigned int up_count = 0;
+
+ size_t current = 0;
+ wchar_t pwc;
+ mbstate_t ps;
+ memset(&ps, 0, sizeof(ps));
+ ssize_t len = 0;
+ while ((len = mbrtowc(&pwc, p_str->p_buf, p_str->len - current, &ps)) > 0)
+ {
+ if (!iswprint(pwc))
+ {
+ for (int i = 0; i < len; i++)
+ {
+ ups[up_count++] = current++;
+ }
+ }
+ else
+ {
+ current += len;
+ }
+ }
+ if (len < 0)
+ {
+ while (current < p_str->len)
+ {
+ ups[up_count++] = current++;
+ }
+ }
+ str_replace_positions_with_hex(p_str, ups, up_count);
+ vsf_sysutil_free(ups);
+}
+
+void
+str_replace_positions_with_hex(struct mystr* p_str, const unsigned int* poss, const unsigned int pos_count)
+{
+ if (pos_count == 0)
+ return;
+
+ struct mystr tmp_str = INIT_MYSTR;
+ str_reserve(&tmp_str, p_str->len + 3 * pos_count);
+ unsigned int current = 0;
+
+ for (unsigned int i=0; i < pos_count; i++)
+ {
+ unsigned int pos = poss[i];
+
+ if (current < pos)
+ private_str_append_memchunk(&tmp_str, p_str->p_buf + current, pos - current);
+
+ char hex_buf[5];
+ memset(hex_buf, 0, sizeof(hex_buf));
+ sprintf(hex_buf, "\\x%02X", (unsigned char) p_str->p_buf[pos]);
+ str_append_text(&tmp_str, hex_buf);
+ current = pos + 1;
+ }
+
+ if (current < p_str->len)
+ private_str_append_memchunk(&tmp_str, p_str->p_buf + current, p_str->len - current);
+
+ str_copy(p_str, &tmp_str);
+ str_free(&tmp_str);
+}
+
void
str_basename (struct mystr* d_str, const struct mystr* path)
{
diff --git a/str.h b/str.h
index 44270da..95a83b5 100644
--- a/str.h
+++ b/str.h
@@ -98,6 +98,10 @@ int str_contains_space(const struct mystr* p_str);
int str_all_space(const struct mystr* p_str);
int str_contains_unprintable(const struct mystr* p_str);
void str_replace_unprintable(struct mystr* p_str, char new_char);
+void str_replace_unprintable_with_hex(struct mystr* p_str);
+void str_replace_unprintable_with_hex_wc(struct mystr* p_str);
+void str_replace_positions_with_hex(struct mystr* p_str, const unsigned int* poss,
+ const unsigned int pos_count);
int str_atoi(const struct mystr* p_str);
filesize_t str_a_to_filesize_t(const struct mystr* p_str);
unsigned int str_octal_to_uint(const struct mystr* p_str);
diff --git a/tunables.c b/tunables.c
index a7ce9c8..c96c1ac 100644
--- a/tunables.c
+++ b/tunables.c
@@ -94,6 +94,7 @@ int tunable_seccomp_sandbox;
int tunable_allow_writeable_chroot;
int tunable_better_stou;
int tunable_log_die;
+int tunable_wc_logs_enable;
unsigned int tunable_accept_timeout;
unsigned int tunable_connect_timeout;
@@ -244,6 +245,7 @@ tunables_load_defaults()
tunable_allow_writeable_chroot = 0;
tunable_better_stou = 0;
tunable_log_die = 0;
+ tunable_wc_logs_enable = 0;
tunable_accept_timeout = 60;
tunable_connect_timeout = 60;
diff --git a/tunables.h b/tunables.h
index 029d645..8d50150 100644
--- a/tunables.h
+++ b/tunables.h
@@ -98,6 +98,7 @@ extern int tunable_better_stou; /* Use better file name generation
*/
extern int tunable_log_die; /* Log calls to die(), die2()
* and bug() */
+extern int tunable_wc_logs_enable; /* Allow non ASCII characters in logs */
/* Integer/numeric defines */
extern unsigned int tunable_accept_timeout;
diff --git a/vsftpd.conf.5 b/vsftpd.conf.5
index ce3fba3..815773f 100644
--- a/vsftpd.conf.5
+++ b/vsftpd.conf.5
@@ -735,6 +735,12 @@ If enabled, use CLONE_NEWPID and CLONE_NEWIPC to isolate processes to their
ipc and pid namespaces. So separated processes can not interact with each other.
Default: YES
+.TP
+.B wc_logs_enable
+If enabled, logs will be treated as wide-character strings and not just
+ASCII strings when filtering out non-printable characters.
+
+Default: NO
.SH NUMERIC OPTIONS
Below is a list of numeric options. A numeric option must be set to a non
|
