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 } 222