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
|
/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2011-2015 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pwd.h>
#include <grp.h>
#include <unistd.h>
#include <sudoers.h>
#include <sudo_iolog.h>
/*
* Like strlcpy(3) but replaces '/' with '_'.
*/
static size_t
strlcpy_no_slash(char *dst, const char *src, size_t size)
{
size_t len = 0;
char ch;
debug_decl(strlcpy_no_slash, SUDOERS_DEBUG_UTIL);
while ((ch = *src++) != '\0') {
if (size > 1) {
/* Replace '/' with '_' */
if (ch == '/')
ch = '_';
*dst++ = ch;
size--;
}
len++;
}
if (size > 0)
*dst = '\0';
debug_return_size_t(len);
}
static size_t
fill_seq(char *str, size_t strsize, void *v)
{
#ifdef SUDOERS_NO_SEQ
debug_decl(fill_seq, SUDOERS_DEBUG_UTIL);
debug_return_size_t(strlcpy(str, "%{seq}", strsize));
#else
struct sudoers_context *ctx = v;
static char sessid[7];
int len;
debug_decl(fill_seq, SUDOERS_DEBUG_UTIL);
if (sessid[0] == '\0') {
if (!iolog_nextid(ctx->iolog_dir, sessid))
debug_return_size_t((size_t)-1);
}
/* Path is of the form /var/log/sudo-io/00/00/01. */
len = snprintf(str, strsize, "%c%c/%c%c/%c%c", sessid[0],
sessid[1], sessid[2], sessid[3], sessid[4], sessid[5]);
if (len < 0)
debug_return_size_t(strsize); /* handle non-standard snprintf() */
debug_return_size_t((size_t)len);
#endif /* SUDOERS_NO_SEQ */
}
static size_t
fill_user(char *str, size_t strsize, void *v)
{
struct sudoers_context *ctx = v;
debug_decl(fill_user, SUDOERS_DEBUG_UTIL);
debug_return_size_t(strlcpy_no_slash(str, ctx->user.name, strsize));
}
static size_t
fill_group(char *str, size_t strsize, void *v)
{
struct sudoers_context *ctx = v;
struct group *grp;
size_t len;
debug_decl(fill_group, SUDOERS_DEBUG_UTIL);
if ((grp = sudo_getgrgid(ctx->user.gid)) != NULL) {
len = strlcpy_no_slash(str, grp->gr_name, strsize);
sudo_gr_delref(grp);
} else {
len = (size_t)snprintf(str, strsize, "#%u", (unsigned int)ctx->user.gid);
}
debug_return_size_t(len);
}
static size_t
fill_runas_user(char *str, size_t strsize, void *v)
{
struct sudoers_context *ctx = v;
debug_decl(fill_runas_user, SUDOERS_DEBUG_UTIL);
debug_return_size_t(strlcpy_no_slash(str, ctx->runas.pw->pw_name, strsize));
}
static size_t
fill_runas_group(char *str, size_t strsize, void *v)
{
struct sudoers_context *ctx = v;
struct group *grp;
size_t len;
debug_decl(fill_runas_group, SUDOERS_DEBUG_UTIL);
if (ctx->runas.gr != NULL) {
len = strlcpy_no_slash(str, ctx->runas.gr->gr_name, strsize);
} else {
if ((grp = sudo_getgrgid(ctx->runas.pw->pw_gid)) != NULL) {
len = strlcpy_no_slash(str, grp->gr_name, strsize);
sudo_gr_delref(grp);
} else {
len = (size_t)snprintf(str, strsize, "#%u",
(unsigned int)ctx->runas.pw->pw_gid);
}
}
debug_return_size_t(len);
}
static size_t
fill_hostname(char *str, size_t strsize, void *v)
{
struct sudoers_context *ctx = v;
debug_decl(fill_hostname, SUDOERS_DEBUG_UTIL);
debug_return_size_t(strlcpy_no_slash(str, ctx->user.shost, strsize));
}
static size_t
fill_command(char *str, size_t strsize, void *v)
{
struct sudoers_context *ctx = v;
debug_decl(fill_command, SUDOERS_DEBUG_UTIL);
debug_return_size_t(strlcpy_no_slash(str, ctx->user.cmnd_base, strsize));
}
/* Note: "seq" must be first in the list. */
static const struct iolog_path_escape path_escapes[] = {
{ "seq", fill_seq },
{ "user", fill_user },
{ "group", fill_group },
{ "runas_user", fill_runas_user },
{ "runas_group", fill_runas_group },
{ "hostname", fill_hostname },
{ "command", fill_command },
{ NULL, NULL }
};
const struct iolog_path_escape *sudoers_iolog_path_escapes = path_escapes;
|
