1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2017 Joyent, Inc.
14 */
15
16 #include <sys/socket.h>
17 #include <net/pfkeyv2.h>
18 #include <stdio.h>
19 #include <errno.h>
20 #include <err.h>
21 #include <unistd.h>
22 #include <stdlib.h>
23 #include <string.h>
24
25 #define COOKIE64 0xc0ffee4afee01deaULL
26 #define COOKIE32 0x90125
27 #define RESERVED 0xc0ffee
28
29 #define EXIT_SETUP_FAIL -1
30 #define EXIT_TEST_FAIL 1
31 #define EXIT_SUCCESS 0
32
33 /*
34 * Exits app on failure.
35 */
36 static void
37 write_and_read(int s, sadb_msg_t *samsg, uint64_t *readbuf, int readlen,
38 char *msgtypestr)
39 {
40 ssize_t rc;
41 uint8_t msgtype = samsg->sadb_msg_type;
42 pid_t pid = samsg->sadb_msg_pid;
43 uint8_t seq = samsg->sadb_msg_seq;
44
45 rc = write(s, samsg, SADB_64TO8(samsg->sadb_msg_len));
46 if (rc == -1)
47 err(EXIT_SETUP_FAIL, "%s write error", msgtypestr);
48
49 /* Yes, parameter re-use, but we're done writing. */
50 samsg = (sadb_msg_t *)readbuf;
51 do {
52 rc = read(s, readbuf, readlen);
53 if (rc == -1)
54 err(EXIT_SETUP_FAIL, "%s read reply error", msgtypestr);
55 } while (samsg->sadb_msg_seq != seq || samsg->sadb_msg_pid != pid ||
56 samsg->sadb_msg_type != msgtype);
57
58 if (samsg->sadb_msg_errno != 0) {
59 errno = samsg->sadb_msg_errno;
60 err(EXIT_SETUP_FAIL, "%s reply has error (diag = %d)",
61 msgtypestr, samsg->sadb_x_msg_diagnostic);
62 }
63 }
64
65 int
66 main(int argc, char *argv[])
67 {
68 uint32_t spi;
69 sadb_ext_t *ext;
70 sadb_sa_t *saext;
71 sadb_msg_t *samsg;
72 sadb_address_t *dstext, *srcext;
73 sadb_x_kmc_t *kmcext;
74 struct sockaddr_in *sin;
75 uint64_t writebuf[20]; /* PF_KEY likes 64-bit alignment. */
76 uint64_t readbuf[128];
77 uint64_t *extptr, *endptr;
78 pid_t pid = getpid();
79 boolean_t do_64_test;
80 int s;
81
82 if (argc != 2 && argc != 3) {
83 (void) fprintf(stderr, "Usage: %s <spi-value> {64}\n",
84 argv[0]);
85 exit(EXIT_SETUP_FAIL);
86 }
87 do_64_test = (argc == 3);
88
89 errno = 0; /* Clear for strtoul() call. */
90 spi = strtoul(argv[1], NULL, 0);
91 if (spi == 0) {
92 if (errno != 0) {
93 err(EXIT_SETUP_FAIL,
94 "Argument %s is not a parsable number:", argv[1]);
95 } else {
96 errno = EINVAL;
97 err(EXIT_SETUP_FAIL, "Zero SPI not allowed:");
98 }
99 }
100
101 s = socket(PF_KEY, SOCK_RAW, PF_KEY_V2);
102 if (s == -1)
103 err(EXIT_SETUP_FAIL, "socket(PF_KEY)");
104
105 /* Base message. */
106 samsg = (sadb_msg_t *)writebuf;
107 samsg->sadb_msg_version = PF_KEY_V2;
108 samsg->sadb_msg_type = SADB_UPDATE;
109 samsg->sadb_msg_errno = 0;
110 samsg->sadb_msg_satype = SADB_SATYPE_AH;
111 samsg->sadb_msg_reserved = 0;
112 samsg->sadb_msg_seq = 1;
113 samsg->sadb_msg_pid = pid;
114 samsg->sadb_msg_len = SADB_8TO64(sizeof (*samsg) + sizeof (*saext) +
115 2 * (sizeof (*dstext) + sizeof (*sin)) + sizeof (*kmcext));
116
117 /* SA extension. Only used to set the SPI. */
118 saext = (sadb_sa_t *)(samsg + 1);
119 memset(saext, 0, sizeof (*saext));
120 saext->sadb_sa_len = SADB_8TO64(sizeof (*saext));
121 saext->sadb_sa_exttype = SADB_EXT_SA;
122 saext->sadb_sa_spi = htonl(spi);
123 saext->sadb_sa_state = SADB_SASTATE_MATURE;
124
125 /* Destination IP, always 127.0.0.1 for this test. */
126 dstext = (sadb_address_t *)(saext + 1);
127 dstext->sadb_address_len = SADB_8TO64(sizeof (*dstext) + sizeof (*sin));
128 dstext->sadb_address_exttype = SADB_EXT_ADDRESS_DST;
129 dstext->sadb_address_proto = 0;
130 dstext->sadb_address_prefixlen = 0;
131 dstext->sadb_address_reserved = 0;
132 sin = (struct sockaddr_in *)(dstext + 1);
133 sin->sin_family = AF_INET;
134 sin->sin_port = 0;
135 sin->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
136
137 /* PF_KEY requires a source address, even if it's a wildcard. */
138 srcext = (sadb_address_t *)(sin + 1);
139 srcext->sadb_address_len = SADB_8TO64(sizeof (*srcext) + sizeof (*sin));
140 srcext->sadb_address_exttype = SADB_EXT_ADDRESS_SRC;
141 srcext->sadb_address_proto = 0;
142 srcext->sadb_address_prefixlen = 0;
143 srcext->sadb_address_reserved = 0;
144 sin = (struct sockaddr_in *)(srcext + 1);
145 sin->sin_family = AF_INET;
146 sin->sin_port = 0;
147 sin->sin_addr.s_addr = 0;
148
149 /*
150 * KM cookie. Depending, either make it IKEv1, 32-bit, AND store
151 * garbage in the reserved field, or just put a big 64-bit cookie in.
152 */
153 kmcext = (sadb_x_kmc_t *)(sin + 1);
154 kmcext->sadb_x_kmc_len = SADB_8TO64(sizeof (*kmcext));
155 kmcext->sadb_x_kmc_exttype = SADB_X_EXT_KM_COOKIE;
156 if (do_64_test) {
157 /* 64-bit cookie test. KINK is non-zero, and non-IKEv1. */
158 kmcext->sadb_x_kmc_proto = SADB_X_KMP_KINK;
159 kmcext->sadb_x_kmc_cookie64 = COOKIE64;
160 } else {
161 /* IKEv1 32-bit cookie test. */
162 kmcext->sadb_x_kmc_proto = SADB_X_KMP_IKE;
163 kmcext->sadb_x_kmc_cookie = COOKIE32;
164 kmcext->sadb_x_kmc_reserved = RESERVED;
165 }
166
167 write_and_read(s, samsg, readbuf, sizeof (readbuf), "SADB_UPDATE");
168
169 /*
170 * Okay, it worked! Now let's find the KMC reported back from the
171 * kernel.
172 */
173 samsg->sadb_msg_type = SADB_GET;
174 samsg->sadb_msg_len -= SADB_8TO64(sizeof (*kmcext));
175
176 /* Everything else in writebuf is good to go. */
177 write_and_read(s, samsg, readbuf, sizeof (readbuf), "SADB_GET");
178
179 /* Actually find the KMC extension. (expand for loop for readability) */
180 samsg = (sadb_msg_t *)readbuf;
181 extptr = (uint64_t *)(samsg + 1);
182 endptr = extptr + samsg->sadb_msg_len - SADB_8TO64(sizeof (*samsg));
183 ext = (sadb_ext_t *)extptr;
184
185 while ((extptr < endptr) &&
186 (ext->sadb_ext_type != SADB_X_EXT_KM_COOKIE)) {
187 extptr += ext->sadb_ext_len;
188 ext = (sadb_ext_t *)extptr;
189 }
190
191 if (extptr == endptr) {
192 (void) fprintf(stderr, "Can't find KMC extension in reply.\n");
193 exit(EXIT_SETUP_FAIL);
194 }
195 kmcext = (sadb_x_kmc_t *)extptr;
196
197 if (do_64_test) {
198 if (kmcext->sadb_x_kmc_proto != SADB_X_KMP_KINK ||
199 kmcext->sadb_x_kmc_cookie64 != COOKIE64) {
200 (void) fprintf(stderr, "Unexpected 64-bit results: "
201 "KMC received was %d, expecting %d,\n",
202 kmcext->sadb_x_kmc_proto, SADB_X_KMP_KINK);
203 (void) fprintf(stderr, "64-bit cookie recevied was "
204 "0x%"PRIx64", expecting 0x%"PRIx64"\n",
205 kmcext->sadb_x_kmc_cookie64, COOKIE64);
206 exit(EXIT_TEST_FAIL);
207 }
208 } else {
209 if (kmcext->sadb_x_kmc_proto != SADB_X_KMP_IKE ||
210 kmcext->sadb_x_kmc_cookie != COOKIE32 ||
211 kmcext->sadb_x_kmc_reserved != 0) {
212 (void) fprintf(stderr, "Unexpected IKE/32-bit results:"
213 " KMC received was %d, expecting %d,\n",
214 kmcext->sadb_x_kmc_proto, SADB_X_KMP_IKE);
215 (void) fprintf(stderr, "32-bit cookie recevied was "
216 "0x%"PRIx32", expecting 0x%"PRIx32"\n",
217 kmcext->sadb_x_kmc_cookie64, COOKIE32);
218 (void) fprintf(stderr, "32-bit reserved recevied was "
219 "0x%"PRIx32", expecting 0\n",
220 kmcext->sadb_x_kmc_cookie64);
221 exit(EXIT_TEST_FAIL);
222 }
223 }
224
225 exit(EXIT_SUCCESS);
226 }