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
216
217
218
219
220
221
222
223
224
225
226
|
/*
* Copyright (C) 2016 Red Hat Inc.
*
* 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.
* * The names of contributors to this software may not 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 OWNER 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.
*
* Author: Daiki Ueno
*/
#include "config.h"
#include "client.h"
#include "compat.h"
#include "library.h"
#include "path.h"
#include "rpc.h"
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct _State {
p11_virtual virt;
p11_rpc_transport *rpc;
CK_FUNCTION_LIST *wrapped;
struct _State *next;
} State;
static State *all_instances = NULL;
static CK_RV
get_runtime_directory (char **directoryp)
{
const char *envvar;
static const char * const bases[] = { "/run", "/var/run", NULL };
char prefix[13 + 1 + 20 + 6 + 1];
char *directory;
uid_t uid;
struct stat sb;
struct passwd pwbuf, *pw;
char buf[1024];
int i;
/* We can't always assume the XDG_RUNTIME_DIR envvar here,
* because the PKCS#11 module can be loaded by a program that
* calls setuid(). */
envvar = secure_getenv ("XDG_RUNTIME_DIR");
if (envvar != NULL && envvar[0] != '\0') {
directory = strdup (envvar);
if (!directory)
return CKR_HOST_MEMORY;
*directoryp = directory;
return CKR_OK;
}
uid = getuid ();
for (i = 0; bases[i] != NULL; i++) {
snprintf (prefix, sizeof prefix, "%s/user/%u",
bases[i], (unsigned int) uid);
if (stat (prefix, &sb) != -1 && S_ISDIR (sb.st_mode)) {
directory = strdup (prefix);
if (!directory)
return CKR_HOST_MEMORY;
*directoryp = directory;
return CKR_OK;
}
}
/* We can't use /run/user/<UID>, fallback to ~/.cache. */
envvar = secure_getenv ("XDG_CACHE_HOME");
if (envvar != NULL && envvar[0] != '\0') {
directory = strdup (envvar);
if (!directory)
return CKR_HOST_MEMORY;
*directoryp = directory;
return CKR_OK;
}
if (getpwuid_r (uid, &pwbuf, buf, sizeof buf, &pw) < 0 ||
pw == NULL || pw->pw_dir == NULL || *pw->pw_dir != '/')
return CKR_GENERAL_ERROR;
if (asprintf (&directory, "%s/.cache", pw->pw_dir) < 0)
return CKR_HOST_MEMORY;
*directoryp = directory;
return CKR_OK;
}
static CK_RV
get_server_address (char **addressp)
{
const char *envvar;
char *path;
char *encoded;
char *address;
char *directory;
int ret;
CK_RV rv;
envvar = secure_getenv ("P11_KIT_SERVER_ADDRESS");
if (envvar != NULL && envvar[0] != '\0') {
address = strdup (envvar);
if (!address)
return CKR_HOST_MEMORY;
*addressp = address;
return CKR_OK;
}
rv = get_runtime_directory (&directory);
if (rv != CKR_OK)
return rv;
ret = asprintf (&path, "%s/p11-kit/pkcs11", directory);
free (directory);
if (ret < 0)
return CKR_HOST_MEMORY;
encoded = p11_path_encode (path);
free (path);
if (!encoded)
return CKR_HOST_MEMORY;
ret = asprintf (&address, "unix:path=%s", encoded);
free (encoded);
if (ret < 0)
return CKR_HOST_MEMORY;
*addressp = address;
return CKR_OK;
}
#ifdef OS_WIN32
__declspec(dllexport)
#endif
CK_RV
C_GetFunctionList (CK_FUNCTION_LIST_PTR_PTR list)
{
char *address = NULL;
State *state;
CK_FUNCTION_LIST_PTR module = NULL;
CK_RV rv = CKR_OK;
p11_library_init_once ();
p11_lock ();
rv = get_server_address (&address);
if (rv == CKR_OK) {
state = calloc (1, sizeof (State));
if (!state)
rv = CKR_HOST_MEMORY;
}
if (rv == CKR_OK) {
state->rpc = p11_rpc_transport_new (&state->virt,
address,
"client");
if (!state->rpc)
rv = CKR_GENERAL_ERROR;
}
if (rv == CKR_OK) {
module = p11_virtual_wrap (&state->virt, free);
if (!module)
rv = CKR_GENERAL_ERROR;
}
if (rv == CKR_OK) {
*list = module;
state->wrapped = module;
state->next = all_instances;
all_instances = state;
}
p11_unlock ();
free (address);
return rv;
}
void
p11_client_module_cleanup (void)
{
State *state, *next;
state = all_instances;
all_instances = NULL;
for (; state != NULL; state = next) {
next = state->next;
p11_rpc_transport_free (state->rpc);
p11_virtual_unwrap (state->wrapped);
}
}
|
