tpm-util.c (9292B)
1 /* 2 * QTest TPM utilities 3 * 4 * Copyright (c) 2018 IBM Corporation 5 * Copyright (c) 2018 Red Hat, Inc. 6 * 7 * Authors: 8 * Stefan Berger <stefanb@linux.vnet.ibm.com> 9 * Marc-André Lureau <marcandre.lureau@redhat.com> 10 * 11 * This work is licensed under the terms of the GNU GPL, version 2 or later. 12 * See the COPYING file in the top-level directory. 13 */ 14 15 #include "qemu/osdep.h" 16 #include <glib/gstdio.h> 17 18 #include "hw/acpi/tpm.h" 19 #include "libqtest.h" 20 #include "tpm-util.h" 21 #include "qapi/qmp/qdict.h" 22 23 void tpm_util_crb_transfer(QTestState *s, 24 const unsigned char *req, size_t req_size, 25 unsigned char *rsp, size_t rsp_size) 26 { 27 uint64_t caddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_CMD_LADDR); 28 uint64_t raddr = qtest_readq(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_RSP_ADDR); 29 30 qtest_writeb(s, TPM_CRB_ADDR_BASE + A_CRB_LOC_CTRL, 1); 31 32 qtest_memwrite(s, caddr, req, req_size); 33 34 uint32_t sts, start = 1; 35 uint64_t end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND; 36 qtest_writel(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START, start); 37 while (true) { 38 start = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START); 39 if ((start & 1) == 0) { 40 break; 41 } 42 if (g_get_monotonic_time() >= end_time) { 43 break; 44 } 45 }; 46 start = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_START); 47 g_assert_cmpint(start & 1, ==, 0); 48 sts = qtest_readl(s, TPM_CRB_ADDR_BASE + A_CRB_CTRL_STS); 49 g_assert_cmpint(sts & 1, ==, 0); 50 51 qtest_memread(s, raddr, rsp, rsp_size); 52 } 53 54 void tpm_util_tis_transfer(QTestState *s, 55 const unsigned char *req, size_t req_size, 56 unsigned char *rsp, size_t rsp_size) 57 { 58 uint32_t sts; 59 uint16_t bcount; 60 size_t i; 61 62 /* request use of locality 0 */ 63 qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_ACCESS), TPM_TIS_ACCESS_REQUEST_USE); 64 qtest_writel(s, TIS_REG(0, TPM_TIS_REG_STS), TPM_TIS_STS_COMMAND_READY); 65 66 sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS)); 67 bcount = (sts >> 8) & 0xffff; 68 g_assert_cmpint(bcount, >=, req_size); 69 70 /* transmit command */ 71 for (i = 0; i < req_size; i++) { 72 qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_DATA_FIFO), req[i]); 73 } 74 75 /* start processing */ 76 qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_STS), TPM_TIS_STS_TPM_GO); 77 78 uint64_t end_time = g_get_monotonic_time() + 50 * G_TIME_SPAN_SECOND; 79 do { 80 sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS)); 81 if ((sts & TPM_TIS_STS_DATA_AVAILABLE) != 0) { 82 break; 83 } 84 } while (g_get_monotonic_time() < end_time); 85 86 sts = qtest_readl(s, TIS_REG(0, TPM_TIS_REG_STS)); 87 bcount = (sts >> 8) & 0xffff; 88 89 memset(rsp, 0, rsp_size); 90 for (i = 0; i < bcount; i++) { 91 rsp[i] = qtest_readb(s, TIS_REG(0, TPM_TIS_REG_DATA_FIFO)); 92 } 93 94 /* relinquish use of locality 0 */ 95 qtest_writeb(s, TIS_REG(0, TPM_TIS_REG_ACCESS), 96 TPM_TIS_ACCESS_ACTIVE_LOCALITY); 97 } 98 99 void tpm_util_startup(QTestState *s, tx_func *tx) 100 { 101 unsigned char buffer[1024]; 102 static const unsigned char tpm_startup[] = 103 "\x80\x01\x00\x00\x00\x0c\x00\x00\x01\x44\x00\x00"; 104 static const unsigned char tpm_startup_resp[] = 105 "\x80\x01\x00\x00\x00\x0a\x00\x00\x00\x00"; 106 107 tx(s, tpm_startup, sizeof(tpm_startup), buffer, sizeof(buffer)); 108 109 g_assert_cmpmem(buffer, sizeof(tpm_startup_resp), 110 tpm_startup_resp, sizeof(tpm_startup_resp)); 111 } 112 113 void tpm_util_pcrextend(QTestState *s, tx_func *tx) 114 { 115 unsigned char buffer[1024]; 116 static const unsigned char tpm_pcrextend[] = 117 "\x80\x02\x00\x00\x00\x41\x00\x00\x01\x82\x00\x00\x00\x0a\x00\x00" 118 "\x00\x09\x40\x00\x00\x09\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00" 119 "\x0b\x74\x65\x73\x74\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" 120 "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" 121 "\x00"; 122 123 static const unsigned char tpm_pcrextend_resp[] = 124 "\x80\x02\x00\x00\x00\x13\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" 125 "\x01\x00\x00"; 126 127 tx(s, tpm_pcrextend, sizeof(tpm_pcrextend), buffer, sizeof(buffer)); 128 129 g_assert_cmpmem(buffer, sizeof(tpm_pcrextend_resp), 130 tpm_pcrextend_resp, sizeof(tpm_pcrextend_resp)); 131 } 132 133 void tpm_util_pcrread(QTestState *s, tx_func *tx, 134 const unsigned char *exp_resp, size_t exp_resp_size) 135 { 136 unsigned char buffer[1024]; 137 static const unsigned char tpm_pcrread[] = 138 "\x80\x01\x00\x00\x00\x14\x00\x00\x01\x7e\x00\x00\x00\x01\x00\x0b" 139 "\x03\x00\x04\x00"; 140 141 tx(s, tpm_pcrread, sizeof(tpm_pcrread), buffer, sizeof(buffer)); 142 143 /* skip pcrUpdateCounter (14th byte) in comparison */ 144 g_assert(exp_resp_size >= 15); 145 g_assert_cmpmem(buffer, 13, exp_resp, 13); 146 g_assert_cmpmem(&buffer[14], exp_resp_size - 14, 147 &exp_resp[14], exp_resp_size - 14); 148 } 149 150 bool tpm_util_swtpm_has_tpm2(void) 151 { 152 bool has_tpm2 = false; 153 char *out = NULL; 154 static const char *argv[] = { 155 "swtpm", "socket", "--help", NULL 156 }; 157 158 if (!g_spawn_sync(NULL /* working_dir */, 159 (char **)argv, 160 NULL /* envp */, 161 G_SPAWN_SEARCH_PATH, 162 NULL /* child_setup */, 163 NULL /* user_data */, 164 &out, 165 NULL /* err */, 166 NULL /* exit_status */, 167 NULL)) { 168 return false; 169 } 170 171 if (strstr(out, "--tpm2")) { 172 has_tpm2 = true; 173 } 174 175 g_free(out); 176 return has_tpm2; 177 } 178 179 gboolean tpm_util_swtpm_start(const char *path, GPid *pid, 180 SocketAddress **addr, GError **error) 181 { 182 char *swtpm_argv_tpmstate = g_strdup_printf("dir=%s", path); 183 char *swtpm_argv_ctrl = g_strdup_printf("type=unixio,path=%s/sock", 184 path); 185 gchar *swtpm_argv[] = { 186 g_strdup("swtpm"), g_strdup("socket"), 187 g_strdup("--tpmstate"), swtpm_argv_tpmstate, 188 g_strdup("--ctrl"), swtpm_argv_ctrl, 189 g_strdup("--tpm2"), 190 NULL 191 }; 192 gboolean succ; 193 unsigned i; 194 195 *addr = g_new0(SocketAddress, 1); 196 (*addr)->type = SOCKET_ADDRESS_TYPE_UNIX; 197 (*addr)->u.q_unix.path = g_build_filename(path, "sock", NULL); 198 199 succ = g_spawn_async(NULL, swtpm_argv, NULL, G_SPAWN_SEARCH_PATH, 200 NULL, NULL, pid, error); 201 202 for (i = 0; swtpm_argv[i]; i++) { 203 g_free(swtpm_argv[i]); 204 } 205 206 return succ; 207 } 208 209 void tpm_util_swtpm_kill(GPid pid) 210 { 211 int n; 212 213 if (!pid) { 214 return; 215 } 216 217 g_spawn_close_pid(pid); 218 219 n = kill(pid, 0); 220 if (n < 0) { 221 return; 222 } 223 224 kill(pid, SIGKILL); 225 } 226 227 void tpm_util_migrate(QTestState *who, const char *uri) 228 { 229 QDict *rsp; 230 231 rsp = qtest_qmp(who, 232 "{ 'execute': 'migrate', 'arguments': { 'uri': %s } }", 233 uri); 234 g_assert(qdict_haskey(rsp, "return")); 235 qobject_unref(rsp); 236 } 237 238 void tpm_util_wait_for_migration_complete(QTestState *who) 239 { 240 while (true) { 241 QDict *rsp; 242 QDict *rsp_return; 243 bool completed; 244 const char *status; 245 246 rsp = qtest_qmp(who, "{ 'execute': 'query-migrate' }"); 247 g_assert(qdict_haskey(rsp, "return")); 248 rsp_return = qdict_get_qdict(rsp, "return"); 249 250 g_assert(!qdict_haskey(rsp_return, "error")); 251 status = qdict_get_str(rsp_return, "status"); 252 completed = strcmp(status, "completed") == 0; 253 g_assert_cmpstr(status, !=, "failed"); 254 qobject_unref(rsp); 255 if (completed) { 256 return; 257 } 258 usleep(1000); 259 } 260 } 261 262 void tpm_util_migration_start_qemu(QTestState **src_qemu, 263 QTestState **dst_qemu, 264 SocketAddress *src_tpm_addr, 265 SocketAddress *dst_tpm_addr, 266 const char *miguri, 267 const char *ifmodel, 268 const char *machine_options) 269 { 270 char *src_qemu_args, *dst_qemu_args; 271 272 src_qemu_args = g_strdup_printf( 273 "%s " 274 "-chardev socket,id=chr,path=%s " 275 "-tpmdev emulator,id=dev,chardev=chr " 276 "-device %s,tpmdev=dev ", 277 machine_options ? : "", src_tpm_addr->u.q_unix.path, ifmodel); 278 279 *src_qemu = qtest_init(src_qemu_args); 280 281 dst_qemu_args = g_strdup_printf( 282 "%s " 283 "-chardev socket,id=chr,path=%s " 284 "-tpmdev emulator,id=dev,chardev=chr " 285 "-device %s,tpmdev=dev " 286 "-incoming %s", 287 machine_options ? : "", 288 dst_tpm_addr->u.q_unix.path, 289 ifmodel, miguri); 290 291 *dst_qemu = qtest_init(dst_qemu_args); 292 293 g_free(src_qemu_args); 294 g_free(dst_qemu_args); 295 } 296 297 /* Remove directory with remainders of swtpm */ 298 void tpm_util_rmdir(const char *path) 299 { 300 char *filename; 301 int ret; 302 303 filename = g_strdup_printf("%s/tpm2-00.permall", path); 304 g_unlink(filename); 305 g_free(filename); 306 307 filename = g_strdup_printf("%s/.lock", path); 308 g_unlink(filename); 309 g_free(filename); 310 311 ret = g_rmdir(path); 312 g_assert(!ret); 313 }