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