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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright 2019 Google LLC
*/
#include <errno.h>
#include <stdlib.h>
#define TST_NO_DEFAULT_MAIN
#include "tst_test.h"
#include "tst_af_alg.h"
#include "lapi/socket.h"
int tst_alg_create(void)
{
TEST(socket(AF_ALG, SOCK_SEQPACKET, 0));
if (TST_RET >= 0)
return TST_RET;
if (TST_ERR == EAFNOSUPPORT)
tst_brk(TCONF, "kernel doesn't support AF_ALG");
tst_brk(TBROK | TTERRNO, "unexpected error creating AF_ALG socket");
return -1;
}
void tst_alg_bind_addr(int algfd, const struct sockaddr_alg *addr)
{
TEST(bind(algfd, (const struct sockaddr *)addr, sizeof(*addr)));
if (TST_RET == 0)
return;
if (TST_ERR == ENOENT) {
tst_brk(TCONF, "kernel doesn't support %s algorithm '%s'",
addr->salg_type, addr->salg_name);
}
tst_brk(TBROK | TTERRNO,
"unexpected error binding AF_ALG socket to %s algorithm '%s'",
addr->salg_type, addr->salg_name);
}
static void init_sockaddr_alg(struct sockaddr_alg *addr,
const char *algtype, const char *algname)
{
memset(addr, 0, sizeof(*addr));
addr->salg_family = AF_ALG;
strncpy((char *)addr->salg_type, algtype, sizeof(addr->salg_type));
if (addr->salg_type[sizeof(addr->salg_type) - 1] != '\0')
tst_brk(TBROK, "algorithm type too long: '%s'", algtype);
strncpy((char *)addr->salg_name, algname, sizeof(addr->salg_name));
if (addr->salg_name[sizeof(addr->salg_name) - 1] != '\0')
tst_brk(TBROK, "algorithm name too long: '%s'", algname);
}
void tst_alg_bind(int algfd, const char *algtype, const char *algname)
{
struct sockaddr_alg addr;
init_sockaddr_alg(&addr, algtype, algname);
tst_alg_bind_addr(algfd, &addr);
}
bool tst_have_alg(const char *algtype, const char *algname)
{
int algfd;
struct sockaddr_alg addr;
bool have_alg = true;
algfd = tst_alg_create();
init_sockaddr_alg(&addr, algtype, algname);
TEST(bind(algfd, (const struct sockaddr *)&addr, sizeof(addr)));
if (TST_RET != 0) {
if (TST_ERR != ENOENT) {
tst_brk(TBROK | TTERRNO,
"unexpected error binding AF_ALG socket to %s algorithm '%s'",
algtype, algname);
}
have_alg = false;
}
close(algfd);
return have_alg;
}
void tst_require_alg(const char *algtype, const char *algname)
{
int algfd = tst_alg_create();
tst_alg_bind(algfd, algtype, algname);
close(algfd);
}
void tst_alg_setkey(int algfd, const uint8_t *key, unsigned int keylen)
{
uint8_t *keybuf = NULL;
unsigned int i;
if (key == NULL) {
/* generate a random key */
keybuf = SAFE_MALLOC(keylen);
for (i = 0; i < keylen; i++)
keybuf[i] = rand();
key = keybuf;
}
TEST(setsockopt(algfd, SOL_ALG, ALG_SET_KEY, key, keylen));
if (TST_RET != 0) {
tst_brk(TBROK | TTERRNO,
"unexpected error setting key (len=%u)", keylen);
}
free(keybuf);
}
int tst_alg_accept(int algfd)
{
TEST(accept(algfd, NULL, NULL));
if (TST_RET < 0) {
tst_brk(TBROK | TTERRNO,
"unexpected error accept()ing AF_ALG request socket");
}
return TST_RET;
}
int tst_alg_setup(const char *algtype, const char *algname,
const uint8_t *key, unsigned int keylen)
{
int algfd = tst_alg_create();
tst_alg_bind(algfd, algtype, algname);
if (keylen != 0)
tst_alg_setkey(algfd, key, keylen);
return algfd;
}
int tst_alg_setup_reqfd(const char *algtype, const char *algname,
const uint8_t *key, unsigned int keylen)
{
int algfd = tst_alg_setup(algtype, algname, key, keylen);
int reqfd = tst_alg_accept(algfd);
close(algfd);
return reqfd;
}
void tst_alg_sendmsg(int reqfd, const void *data, size_t datalen,
const struct tst_alg_sendmsg_params *params)
{
struct iovec iov = {
.iov_base = (void *)data,
.iov_len = datalen,
};
struct msghdr msg = {
.msg_iov = &iov,
.msg_iovlen = 1,
.msg_flags = params->msg_flags,
};
size_t controllen;
uint8_t *control;
struct cmsghdr *cmsg;
struct af_alg_iv *alg_iv;
if (params->encrypt && params->decrypt)
tst_brk(TBROK, "Both encrypt and decrypt are specified");
controllen = 0;
if (params->encrypt || params->decrypt)
controllen += CMSG_SPACE(sizeof(uint32_t));
if (params->ivlen)
controllen += CMSG_SPACE(sizeof(struct af_alg_iv) +
params->ivlen);
if (params->assoclen)
controllen += CMSG_SPACE(sizeof(uint32_t));
control = SAFE_MALLOC(controllen);
memset(control, 0, controllen);
msg.msg_control = control;
msg.msg_controllen = controllen;
cmsg = CMSG_FIRSTHDR(&msg);
if (params->encrypt || params->decrypt) {
cmsg->cmsg_level = SOL_ALG;
cmsg->cmsg_type = ALG_SET_OP;
cmsg->cmsg_len = CMSG_LEN(sizeof(uint32_t));
*(uint32_t *)CMSG_DATA(cmsg) =
params->encrypt ? ALG_OP_ENCRYPT : ALG_OP_DECRYPT;
cmsg = CMSG_NXTHDR(&msg, cmsg);
}
if (params->ivlen) {
cmsg->cmsg_level = SOL_ALG;
cmsg->cmsg_type = ALG_SET_IV;
cmsg->cmsg_len = CMSG_LEN(sizeof(struct af_alg_iv) +
params->ivlen);
alg_iv = (struct af_alg_iv *)CMSG_DATA(cmsg);
alg_iv->ivlen = params->ivlen;
memcpy(alg_iv->iv, params->iv, params->ivlen);
cmsg = CMSG_NXTHDR(&msg, cmsg);
}
if (params->assoclen) {
cmsg->cmsg_level = SOL_ALG;
cmsg->cmsg_type = ALG_SET_AEAD_ASSOCLEN;
cmsg->cmsg_len = CMSG_LEN(sizeof(uint32_t));
*(uint32_t *)CMSG_DATA(cmsg) = params->assoclen;
cmsg = CMSG_NXTHDR(&msg, cmsg);
}
SAFE_SENDMSG(datalen, reqfd, &msg, 0);
}
|
