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
|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/capability.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
/*
* tests for cap_launch.
*/
#define MORE_THAN_ENOUGH 20
#define NO_MORE 1
struct test_case_s {
int pass_on;
const char *chroot;
uid_t uid;
gid_t gid;
int ngroups;
const gid_t groups[MORE_THAN_ENOUGH];
const char *args[MORE_THAN_ENOUGH];
const char **envp;
const char *iab;
cap_mode_t mode;
int launch_abort;
int result;
int (*callback_fn)(void *detail);
};
#ifdef WITH_PTHREADS
#include <pthread.h>
#else /* WITH_PTHREADS */
#endif /* WITH_PTHREADS */
/*
* clean_out drops all process capabilities.
*/
static int clean_out(void *data) {
cap_t empty;
empty = cap_init();
cap_set_proc(empty);
cap_free(empty);
return 0;
}
int main(int argc, char **argv) {
static struct test_case_s vs[] = {
{
.args = { "../progs/tcapsh-static", "--", "-c", "echo hello" },
.result = 0
},
{
.args = { "../progs/tcapsh-static", "--", "-c", "echo hello" },
.callback_fn = &clean_out,
.result = 0
},
{
.callback_fn = &clean_out,
.result = 0
},
{
.args = { "../progs/tcapsh-static", "--is-uid=123" },
.result = 256
},
{
.args = { "/", "won't", "work" },
.launch_abort = 1,
},
{
.args = { "../progs/tcapsh-static", "--is-uid=123" },
.uid = 123,
.result = 0,
},
{
.args = { "../progs/tcapsh-static", "--is-uid=123" },
.callback_fn = &clean_out,
.uid = 123,
.launch_abort = 1,
},
{
.args = { "../progs/tcapsh-static", "--is-gid=123" },
.result = 0,
.gid = 123,
.ngroups = 1,
.groups = { 456 },
.iab = "",
},
{
.args = { "../progs/tcapsh-static", "--dropped=cap_chown",
"--has-i=cap_chown" },
.result = 0,
.iab = "!%cap_chown"
},
{
.args = { "../progs/tcapsh-static", "--dropped=cap_chown",
"--has-i=cap_chown", "--is-uid=234",
"--has-a=cap_chown", "--has-p=cap_chown" },
.uid = 234,
.result = 0,
.iab = "!^cap_chown"
},
{
.args = { "../progs/tcapsh-static", "--inmode=NOPRIV",
"--has-no-new-privs" },
.result = 0,
.mode = CAP_MODE_NOPRIV
},
{
.args = { "/noop" },
.result = 0,
.chroot = ".",
},
{
.pass_on = NO_MORE
},
};
cap_t orig = cap_get_proc();
int success = 1, i;
for (i=0; vs[i].pass_on != NO_MORE; i++) {
const struct test_case_s *v = &vs[i];
printf("[%d] test should %s\n", i,
v->result || v->launch_abort ? "generate error" : "work");
cap_launch_t attr;
if (v->args[0] != NULL) {
attr = cap_new_launcher(v->args[0], v->args, v->envp);
if (v->callback_fn != NULL) {
cap_launcher_callback(attr, v->callback_fn);
}
} else {
attr = cap_func_launcher(v->callback_fn);
}
if (v->chroot) {
cap_launcher_set_chroot(attr, v->chroot);
}
if (v->uid) {
cap_launcher_setuid(attr, v->uid);
}
if (v->gid) {
cap_launcher_setgroups(attr, v->gid, v->ngroups, v->groups);
}
if (v->iab) {
cap_iab_t iab = cap_iab_from_text(v->iab);
if (iab == NULL) {
fprintf(stderr, "[%d] failed to decode iab [%s]", i, v->iab);
perror(":");
success = 0;
continue;
}
cap_iab_t old = cap_launcher_set_iab(attr, iab);
if (cap_free(old)) {
fprintf(stderr, "[%d] failed to decode iab [%s]", i, v->iab);
perror(":");
success = 0;
continue;
}
}
if (v->mode) {
cap_launcher_set_mode(attr, v->mode);
}
pid_t child = cap_launch(attr, NULL);
if (child <= 0) {
fprintf(stderr, "[%d] failed to launch: ", i);
perror("");
if (!v->launch_abort) {
success = 0;
}
continue;
}
if (cap_free(attr)) {
fprintf(stderr, "[%d] failed to free launcher: ", i);
perror("");
success = 0;
}
int result;
int ret = waitpid(child, &result, 0);
if (ret != child) {
fprintf(stderr, "[%d] failed to wait: ", i);
perror("");
success = 0;
continue;
}
if (result != v->result) {
fprintf(stderr, "[%d] bad result: got=%d want=%d: ", i, result,
v->result);
perror("");
success = 0;
continue;
}
}
cap_t final = cap_get_proc();
if (cap_compare(orig, final)) {
char *was = cap_to_text(orig, NULL);
char *is = cap_to_text(final, NULL);
printf("cap_launch_test: orig:'%s' != final:'%s'\n", was, is);
cap_free(is);
cap_free(was);
success = 0;
}
cap_free(final);
cap_free(orig);
if (!success) {
printf("cap_launch_test: FAILED\n");
exit(1);
}
printf("cap_launch_test: PASSED\n");
exit(0);
}
|
