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
|
#include <unistd.h>
#include <stdio.h>
#include "sway/config.h"
#include "sway/security.h"
#include "log.h"
struct feature_policy *alloc_feature_policy(const char *program) {
uint32_t default_policy = 0;
for (int i = 0; i < config->feature_policies->length; ++i) {
struct feature_policy *policy = config->feature_policies->items[i];
if (strcmp(policy->program, "*") == 0) {
default_policy = policy->features;
break;
}
}
struct feature_policy *policy = malloc(sizeof(struct feature_policy));
if (!policy) {
return NULL;
}
policy->program = strdup(program);
if (!policy->program) {
free(policy);
return NULL;
}
policy->features = default_policy;
return policy;
}
struct ipc_policy *alloc_ipc_policy(const char *program) {
uint32_t default_policy = 0;
for (int i = 0; i < config->ipc_policies->length; ++i) {
struct ipc_policy *policy = config->ipc_policies->items[i];
if (strcmp(policy->program, "*") == 0) {
default_policy = policy->features;
break;
}
}
struct ipc_policy *policy = malloc(sizeof(struct ipc_policy));
if (!policy) {
return NULL;
}
policy->program = strdup(program);
if (!policy->program) {
free(policy);
return NULL;
}
policy->features = default_policy;
return policy;
}
struct command_policy *alloc_command_policy(const char *command) {
struct command_policy *policy = malloc(sizeof(struct command_policy));
if (!policy) {
return NULL;
}
policy->command = strdup(command);
if (!policy->command) {
free(policy);
return NULL;
}
policy->context = 0;
return policy;
}
static const char *get_pid_exe(pid_t pid) {
#ifdef __FreeBSD__
const char *fmt = "/proc/%d/file";
#else
const char *fmt = "/proc/%d/exe";
#endif
int pathlen = snprintf(NULL, 0, fmt, pid);
char *path = malloc(pathlen + 1);
if (path) {
snprintf(path, pathlen + 1, fmt, pid);
}
static char link[2048];
ssize_t len = !path ? -1 : readlink(path, link, sizeof(link));
if (len < 0) {
sway_log(L_INFO,
"WARNING: unable to read %s for security check. Using default policy.",
path);
strcpy(link, "*");
} else {
link[len] = '\0';
}
free(path);
return link;
}
uint32_t get_feature_policy(pid_t pid) {
uint32_t default_policy = 0;
const char *link = get_pid_exe(pid);
for (int i = 0; i < config->feature_policies->length; ++i) {
struct feature_policy *policy = config->feature_policies->items[i];
if (strcmp(policy->program, "*") == 0) {
default_policy = policy->features;
}
if (strcmp(policy->program, link) == 0) {
return policy->features;
}
}
return default_policy;
}
uint32_t get_ipc_policy(pid_t pid) {
uint32_t default_policy = 0;
const char *link = get_pid_exe(pid);
for (int i = 0; i < config->ipc_policies->length; ++i) {
struct ipc_policy *policy = config->ipc_policies->items[i];
if (strcmp(policy->program, "*") == 0) {
default_policy = policy->features;
}
if (strcmp(policy->program, link) == 0) {
return policy->features;
}
}
return default_policy;
}
uint32_t get_command_policy(const char *cmd) {
uint32_t default_policy = 0;
for (int i = 0; i < config->command_policies->length; ++i) {
struct command_policy *policy = config->command_policies->items[i];
if (strcmp(policy->command, "*") == 0) {
default_policy = policy->context;
}
if (strcmp(policy->command, cmd) == 0) {
return policy->context;
}
}
return default_policy;
}
const char *command_policy_str(enum command_context context) {
switch (context) {
case CONTEXT_ALL:
return "all";
case CONTEXT_CONFIG:
return "config";
case CONTEXT_BINDING:
return "binding";
case CONTEXT_IPC:
return "IPC";
case CONTEXT_CRITERIA:
return "criteria";
default:
return "unknown";
}
}
|
