Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 1 | // Implementation of the TCG BIOS extension according to the specification |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 2 | // described in specs found at |
| 3 | // http://www.trustedcomputinggroup.org/resources/pc_client_work_group_specific_implementation_specification_for_conventional_bios |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 4 | // |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 5 | // Copyright (C) 2006-2011, 2014, 2015 IBM Corporation |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 6 | // |
| 7 | // Authors: |
| 8 | // Stefan Berger <stefanb@linux.vnet.ibm.com> |
| 9 | // |
| 10 | // This file may be distributed under the terms of the GNU LGPLv3 license. |
| 11 | |
Kevin O'Connor | df50aaa | 2015-11-19 09:24:18 -0500 | [diff] [blame] | 12 | #include "bregs.h" // struct bregs |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 13 | #include "byteorder.h" // cpu_to_* |
Kevin O'Connor | df50aaa | 2015-11-19 09:24:18 -0500 | [diff] [blame] | 14 | #include "config.h" // CONFIG_TCGBIOS |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 15 | #include "farptr.h" // MAKE_FLATPTR |
Kevin O'Connor | df50aaa | 2015-11-19 09:24:18 -0500 | [diff] [blame] | 16 | #include "fw/paravirt.h" // runningOnXen |
| 17 | #include "hw/tpm_drivers.h" // tpm_drivers[] |
| 18 | #include "output.h" // dprintf |
| 19 | #include "sha1.h" // sha1 |
| 20 | #include "std/acpi.h" // RSDP_SIGNATURE, rsdt_descriptor |
| 21 | #include "std/smbios.h" // struct smbios_entry_point |
| 22 | #include "std/tcg.h" // TCG_PC_LOGOVERFLOW |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 23 | #include "string.h" // checksum |
| 24 | #include "tcgbios.h"// tpm_*, prototypes |
| 25 | #include "util.h" // printf, get_keystroke |
Stefan Berger | 320df85 | 2015-11-30 11:14:19 -0500 | [diff] [blame^] | 26 | #include "stacks.h" // wait_threads, reset |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 27 | |
Stefan Berger | 0d289b5 | 2015-06-09 19:56:29 -0400 | [diff] [blame] | 28 | static const u8 Startup_ST_CLEAR[] = { 0x00, TPM_ST_CLEAR }; |
| 29 | static const u8 Startup_ST_STATE[] = { 0x00, TPM_ST_STATE }; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 30 | |
Stefan Berger | 0d289b5 | 2015-06-09 19:56:29 -0400 | [diff] [blame] | 31 | static const u8 PhysicalPresence_CMD_ENABLE[] = { 0x00, 0x20 }; |
| 32 | static const u8 PhysicalPresence_CMD_DISABLE[] = { 0x01, 0x00 }; |
| 33 | static const u8 PhysicalPresence_PRESENT[] = { 0x00, 0x08 }; |
| 34 | static const u8 PhysicalPresence_NOT_PRESENT_LOCK[] = { 0x00, 0x14 }; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 35 | |
| 36 | static const u8 CommandFlag_FALSE[1] = { 0x00 }; |
| 37 | static const u8 CommandFlag_TRUE[1] = { 0x01 }; |
| 38 | |
Stefan Berger | 0d289b5 | 2015-06-09 19:56:29 -0400 | [diff] [blame] | 39 | static const u8 GetCapability_Permanent_Flags[] = { |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 40 | 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, |
| 41 | 0x00, 0x00, 0x01, 0x08 |
| 42 | }; |
| 43 | |
Stefan Berger | 320df85 | 2015-11-30 11:14:19 -0500 | [diff] [blame^] | 44 | static const u8 GetCapability_STClear_Flags[] = { |
| 45 | 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x04, |
| 46 | 0x00, 0x00, 0x01, 0x09 |
| 47 | }; |
| 48 | |
Stefan Berger | 0d289b5 | 2015-06-09 19:56:29 -0400 | [diff] [blame] | 49 | static const u8 GetCapability_OwnerAuth[] = { |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 50 | 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x04, |
| 51 | 0x00, 0x00, 0x01, 0x11 |
| 52 | }; |
| 53 | |
| 54 | static const u8 GetCapability_Timeouts[] = { |
| 55 | 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x04, |
| 56 | 0x00, 0x00, 0x01, 0x15 |
| 57 | }; |
| 58 | |
| 59 | static const u8 GetCapability_Durations[] = { |
| 60 | 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x04, |
| 61 | 0x00, 0x00, 0x01, 0x20 |
| 62 | }; |
| 63 | |
| 64 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 65 | /**************************************************************** |
| 66 | * TPM state tracking |
| 67 | ****************************************************************/ |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 68 | |
| 69 | typedef struct { |
| 70 | u8 tpm_probed:1; |
| 71 | u8 tpm_found:1; |
| 72 | u8 tpm_working:1; |
| 73 | u8 if_shutdown:1; |
| 74 | u8 tpm_driver_to_use:4; |
Stefan Berger | 60bb9e9 | 2015-11-21 14:54:42 -0500 | [diff] [blame] | 75 | struct tcpa_descriptor_rev2 *tcpa; |
| 76 | |
| 77 | /* length of the TCPA log buffer */ |
| 78 | u32 log_area_minimum_length; |
| 79 | |
| 80 | /* start address of TCPA log buffer */ |
| 81 | u8 * log_area_start_address; |
| 82 | |
| 83 | /* number of log entries written */ |
| 84 | u32 entry_count; |
| 85 | |
| 86 | /* address to write next log entry to */ |
| 87 | u8 * log_area_next_entry; |
| 88 | |
| 89 | /* address of last entry written (need for TCG_StatusCheck) */ |
| 90 | u8 * log_area_last_entry; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 91 | } tpm_state_t; |
| 92 | |
Stefan Berger | 60bb9e9 | 2015-11-21 14:54:42 -0500 | [diff] [blame] | 93 | tpm_state_t tpm_state VARLOW = { |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 94 | .tpm_driver_to_use = TPM_INVALID_DRIVER, |
| 95 | }; |
| 96 | |
Stefan Berger | 320df85 | 2015-11-30 11:14:19 -0500 | [diff] [blame^] | 97 | typedef u8 tpm_ppi_code; |
| 98 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 99 | static u32 |
| 100 | is_preboot_if_shutdown(void) |
| 101 | { |
| 102 | return tpm_state.if_shutdown; |
| 103 | } |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 104 | |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 105 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 106 | /**************************************************************** |
| 107 | * TPM hardware interface |
| 108 | ****************************************************************/ |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 109 | |
| 110 | static u32 |
| 111 | is_tpm_present(void) |
| 112 | { |
| 113 | u32 rc = 0; |
| 114 | unsigned int i; |
| 115 | |
| 116 | for (i = 0; i < TPM_NUM_DRIVERS; i++) { |
| 117 | struct tpm_driver *td = &tpm_drivers[i]; |
| 118 | if (td->probe() != 0) { |
| 119 | td->init(); |
| 120 | tpm_state.tpm_driver_to_use = i; |
| 121 | rc = 1; |
| 122 | break; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | return rc; |
| 127 | } |
| 128 | |
| 129 | static void |
| 130 | probe_tpm(void) |
| 131 | { |
| 132 | if (!tpm_state.tpm_probed) { |
| 133 | tpm_state.tpm_probed = 1; |
| 134 | tpm_state.tpm_found = (is_tpm_present() != 0); |
| 135 | tpm_state.tpm_working = tpm_state.tpm_found; |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | static int |
| 140 | has_working_tpm(void) |
| 141 | { |
| 142 | probe_tpm(); |
| 143 | |
| 144 | return tpm_state.tpm_working; |
| 145 | } |
| 146 | |
Stefan Berger | 320df85 | 2015-11-30 11:14:19 -0500 | [diff] [blame^] | 147 | int |
| 148 | tpm_is_working(void) |
| 149 | { |
| 150 | if (!CONFIG_TCGBIOS) |
| 151 | return 0; |
| 152 | |
| 153 | return tpm_state.tpm_working; |
| 154 | } |
| 155 | |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 156 | static u32 |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 157 | transmit(u8 locty, struct tpm_req_header *req, |
| 158 | void *respbuffer, u32 *respbufferlen, |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 159 | enum tpmDurationType to_t) |
| 160 | { |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 161 | if (tpm_state.tpm_driver_to_use == TPM_INVALID_DRIVER) |
| 162 | return TCG_FATAL_COM_ERROR; |
| 163 | |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 164 | struct tpm_driver *td = &tpm_drivers[tpm_state.tpm_driver_to_use]; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 165 | |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 166 | u32 irc = td->activate(locty); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 167 | if (irc != 0) { |
| 168 | /* tpm could not be activated */ |
| 169 | return TCG_FATAL_COM_ERROR; |
| 170 | } |
| 171 | |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 172 | irc = td->senddata((void*)req, be32_to_cpu(req->totlen)); |
| 173 | if (irc != 0) |
| 174 | return TCG_FATAL_COM_ERROR; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 175 | |
| 176 | irc = td->waitdatavalid(); |
| 177 | if (irc != 0) |
| 178 | return TCG_FATAL_COM_ERROR; |
| 179 | |
| 180 | irc = td->waitrespready(to_t); |
| 181 | if (irc != 0) |
| 182 | return TCG_FATAL_COM_ERROR; |
| 183 | |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 184 | irc = td->readresp(respbuffer, respbufferlen); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 185 | if (irc != 0) |
| 186 | return TCG_FATAL_COM_ERROR; |
| 187 | |
| 188 | td->ready(); |
| 189 | |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 190 | return 0; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 194 | /**************************************************************** |
| 195 | * ACPI TCPA table interface |
| 196 | ****************************************************************/ |
| 197 | |
| 198 | static struct tcpa_descriptor_rev2 * |
| 199 | find_tcpa_by_rsdp(struct rsdp_descriptor *rsdp) |
| 200 | { |
| 201 | u32 ctr = 0; |
| 202 | struct tcpa_descriptor_rev2 *tcpa = NULL; |
| 203 | struct rsdt_descriptor *rsdt; |
| 204 | u32 length; |
| 205 | u16 off; |
| 206 | |
| 207 | rsdt = (struct rsdt_descriptor *)rsdp->rsdt_physical_address; |
| 208 | if (!rsdt) |
| 209 | return NULL; |
| 210 | |
| 211 | length = rsdt->length; |
| 212 | off = offsetof(struct rsdt_descriptor, entry); |
| 213 | |
| 214 | while ((off + sizeof(rsdt->entry[0])) <= length) { |
| 215 | /* try all pointers to structures */ |
| 216 | tcpa = (struct tcpa_descriptor_rev2 *)(int)rsdt->entry[ctr]; |
| 217 | |
| 218 | /* valid TCPA ACPI table ? */ |
| 219 | if (tcpa->signature == TCPA_SIGNATURE && |
| 220 | checksum((u8 *)tcpa, tcpa->length) == 0) |
| 221 | break; |
| 222 | |
| 223 | tcpa = NULL; |
| 224 | off += sizeof(rsdt->entry[0]); |
| 225 | ctr++; |
| 226 | } |
| 227 | |
| 228 | /* cache it */ |
| 229 | if (tcpa) |
| 230 | tpm_state.tcpa = tcpa; |
| 231 | |
| 232 | return tcpa; |
| 233 | } |
| 234 | |
| 235 | static struct tcpa_descriptor_rev2 * |
| 236 | find_tcpa_table(void) |
| 237 | { |
| 238 | struct tcpa_descriptor_rev2 *tcpa = NULL; |
| 239 | struct rsdp_descriptor *rsdp = RsdpAddr; |
| 240 | |
| 241 | if (tpm_state.tcpa) |
| 242 | return tpm_state.tcpa; |
| 243 | |
| 244 | if (rsdp) |
| 245 | tcpa = find_tcpa_by_rsdp(rsdp); |
| 246 | else |
| 247 | tpm_state.if_shutdown = 1; |
| 248 | |
| 249 | if (!rsdp) |
| 250 | dprintf(DEBUG_tcg, |
| 251 | "TCGBIOS: RSDP was NOT found! -- Disabling interface.\n"); |
| 252 | else if (!tcpa) |
| 253 | dprintf(DEBUG_tcg, "TCGBIOS: TCPA ACPI was NOT found!\n"); |
| 254 | |
| 255 | return tcpa; |
| 256 | } |
| 257 | |
| 258 | static u8 * |
| 259 | get_lasa_base_ptr(u32 *log_area_minimum_length) |
| 260 | { |
| 261 | u8 *log_area_start_address = 0; |
| 262 | struct tcpa_descriptor_rev2 *tcpa = find_tcpa_table(); |
| 263 | |
| 264 | if (tcpa) { |
| 265 | log_area_start_address = (u8 *)(long)tcpa->log_area_start_address; |
| 266 | if (log_area_minimum_length) |
| 267 | *log_area_minimum_length = tcpa->log_area_minimum_length; |
| 268 | } |
| 269 | |
| 270 | return log_area_start_address; |
| 271 | } |
| 272 | |
| 273 | /* clear the ACPI log */ |
| 274 | static void |
| 275 | reset_acpi_log(void) |
| 276 | { |
| 277 | tpm_state.log_area_start_address = |
| 278 | get_lasa_base_ptr(&tpm_state.log_area_minimum_length); |
| 279 | |
| 280 | if (tpm_state.log_area_start_address) |
| 281 | memset(tpm_state.log_area_start_address, 0, |
| 282 | tpm_state.log_area_minimum_length); |
| 283 | |
| 284 | tpm_state.log_area_next_entry = tpm_state.log_area_start_address; |
| 285 | tpm_state.log_area_last_entry = NULL; |
| 286 | tpm_state.entry_count = 0; |
| 287 | } |
| 288 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 289 | /* |
| 290 | * Extend the ACPI log with the given entry by copying the |
| 291 | * entry data into the log. |
| 292 | * Input |
| 293 | * pcpes : Pointer to the event 'header' to be copied into the log |
| 294 | * event : Pointer to the event 'body' to be copied into the log |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 295 | * |
| 296 | * Output: |
| 297 | * Returns an error code in case of faiure, 0 in case of success |
| 298 | */ |
| 299 | static u32 |
Kevin O'Connor | 4e7cf9c | 2015-11-22 18:51:31 -0500 | [diff] [blame] | 300 | tpm_log_event(struct pcpes *pcpes, const void *event) |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 301 | { |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 302 | dprintf(DEBUG_tcg, "TCGBIOS: LASA = %p, next entry = %p\n", |
| 303 | tpm_state.log_area_start_address, tpm_state.log_area_next_entry); |
| 304 | |
Kevin O'Connor | f4820ac | 2015-11-22 11:00:06 -0500 | [diff] [blame] | 305 | if (tpm_state.log_area_next_entry == NULL) |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 306 | return TCG_PC_LOGOVERFLOW; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 307 | |
Kevin O'Connor | 7bf7738 | 2015-11-22 17:28:36 -0500 | [diff] [blame] | 308 | u32 size = sizeof(*pcpes) + pcpes->eventdatasize; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 309 | |
| 310 | if ((tpm_state.log_area_next_entry + size - tpm_state.log_area_start_address) > |
| 311 | tpm_state.log_area_minimum_length) { |
| 312 | dprintf(DEBUG_tcg, "TCGBIOS: LOG OVERFLOW: size = %d\n", size); |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 313 | return TCG_PC_LOGOVERFLOW; |
| 314 | } |
| 315 | |
Kevin O'Connor | bad6f96 | 2015-11-23 22:32:09 -0500 | [diff] [blame] | 316 | memcpy(tpm_state.log_area_next_entry, pcpes, sizeof(*pcpes)); |
| 317 | memcpy(tpm_state.log_area_next_entry + sizeof(*pcpes), |
Kevin O'Connor | 7bf7738 | 2015-11-22 17:28:36 -0500 | [diff] [blame] | 318 | event, pcpes->eventdatasize); |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 319 | |
| 320 | tpm_state.log_area_last_entry = tpm_state.log_area_next_entry; |
| 321 | tpm_state.log_area_next_entry += size; |
| 322 | tpm_state.entry_count++; |
| 323 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 324 | return 0; |
| 325 | } |
| 326 | |
| 327 | |
| 328 | /**************************************************************** |
| 329 | * Helper functions |
| 330 | ****************************************************************/ |
| 331 | |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 332 | /* |
| 333 | * Send a TPM command with the given ordinal. Append the given buffer |
| 334 | * containing all data in network byte order to the command (this is |
| 335 | * the custom part per command) and expect a response of the given size. |
| 336 | * If a buffer is provided, the response will be copied into it. |
| 337 | */ |
| 338 | static u32 |
Stefan Berger | 47b9df5 | 2015-11-21 14:54:40 -0500 | [diff] [blame] | 339 | build_and_send_cmd(u8 locty, u32 ordinal, const u8 *append, u32 append_size, |
| 340 | u8 *resbuffer, u32 return_size, u32 *returnCode, |
| 341 | enum tpmDurationType to_t) |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 342 | { |
Kevin O'Connor | b82bc51 | 2015-11-22 17:56:53 -0500 | [diff] [blame] | 343 | struct { |
| 344 | struct tpm_req_header trqh; |
| 345 | u8 cmd[20]; |
| 346 | } PACKED req = { |
| 347 | .trqh.tag = cpu_to_be16(TPM_TAG_RQU_CMD), |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 348 | .trqh.totlen = cpu_to_be32(sizeof(req.trqh) + append_size), |
Kevin O'Connor | b82bc51 | 2015-11-22 17:56:53 -0500 | [diff] [blame] | 349 | .trqh.ordinal = cpu_to_be32(ordinal), |
| 350 | }; |
Stefan Berger | ece2561 | 2015-11-12 10:14:46 -0500 | [diff] [blame] | 351 | u8 obuffer[64]; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 352 | struct tpm_rsp_header *trsh = (struct tpm_rsp_header *)obuffer; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 353 | u32 obuffer_len = sizeof(obuffer); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 354 | memset(obuffer, 0x0, sizeof(obuffer)); |
| 355 | |
Kevin O'Connor | b82bc51 | 2015-11-22 17:56:53 -0500 | [diff] [blame] | 356 | if (return_size > sizeof(obuffer) || append_size > sizeof(req.cmd)) { |
| 357 | warn_internalerror(); |
| 358 | return TCG_FIRMWARE_ERROR; |
| 359 | } |
| 360 | if (append_size) |
| 361 | memcpy(req.cmd, append, append_size); |
| 362 | |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 363 | u32 rc = transmit(locty, &req.trqh, obuffer, &obuffer_len, to_t); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 364 | if (rc) |
| 365 | return rc; |
| 366 | |
| 367 | *returnCode = be32_to_cpu(trsh->errcode); |
| 368 | |
| 369 | if (resbuffer) |
| 370 | memcpy(resbuffer, trsh, return_size); |
| 371 | |
| 372 | return 0; |
| 373 | } |
| 374 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 375 | static void |
| 376 | tpm_set_failure(void) |
| 377 | { |
| 378 | u32 returnCode; |
| 379 | |
| 380 | /* we will try to deactivate the TPM now - ignoring all errors */ |
| 381 | build_and_send_cmd(0, TPM_ORD_PhysicalPresence, |
| 382 | PhysicalPresence_CMD_ENABLE, |
| 383 | sizeof(PhysicalPresence_CMD_ENABLE), |
| 384 | NULL, 0, &returnCode, |
| 385 | TPM_DURATION_TYPE_SHORT); |
| 386 | |
| 387 | build_and_send_cmd(0, TPM_ORD_PhysicalPresence, |
| 388 | PhysicalPresence_PRESENT, |
| 389 | sizeof(PhysicalPresence_PRESENT), |
| 390 | NULL, 0, &returnCode, |
| 391 | TPM_DURATION_TYPE_SHORT); |
| 392 | |
| 393 | build_and_send_cmd(0, TPM_ORD_SetTempDeactivated, |
| 394 | NULL, 0, NULL, 0, &returnCode, |
| 395 | TPM_DURATION_TYPE_SHORT); |
| 396 | |
| 397 | tpm_state.tpm_working = 0; |
| 398 | } |
| 399 | |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 400 | static u32 |
| 401 | determine_timeouts(void) |
| 402 | { |
| 403 | u32 rc; |
| 404 | u32 returnCode; |
| 405 | struct tpm_res_getcap_timeouts timeouts; |
| 406 | struct tpm_res_getcap_durations durations; |
| 407 | struct tpm_driver *td = &tpm_drivers[tpm_state.tpm_driver_to_use]; |
| 408 | u32 i; |
| 409 | |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 410 | rc = build_and_send_cmd(0, TPM_ORD_GetCapability, |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 411 | GetCapability_Timeouts, |
| 412 | sizeof(GetCapability_Timeouts), |
Stefan Berger | fc2e715 | 2015-06-09 19:56:31 -0400 | [diff] [blame] | 413 | (u8 *)&timeouts, sizeof(timeouts), |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 414 | &returnCode, TPM_DURATION_TYPE_SHORT); |
| 415 | |
| 416 | dprintf(DEBUG_tcg, "TCGBIOS: Return code from TPM_GetCapability(Timeouts)" |
| 417 | " = 0x%08x\n", returnCode); |
| 418 | |
| 419 | if (rc || returnCode) |
| 420 | goto err_exit; |
| 421 | |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 422 | rc = build_and_send_cmd(0, TPM_ORD_GetCapability, |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 423 | GetCapability_Durations, |
| 424 | sizeof(GetCapability_Durations), |
Stefan Berger | fc2e715 | 2015-06-09 19:56:31 -0400 | [diff] [blame] | 425 | (u8 *)&durations, sizeof(durations), |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 426 | &returnCode, TPM_DURATION_TYPE_SHORT); |
| 427 | |
| 428 | dprintf(DEBUG_tcg, "TCGBIOS: Return code from TPM_GetCapability(Durations)" |
| 429 | " = 0x%08x\n", returnCode); |
| 430 | |
| 431 | if (rc || returnCode) |
| 432 | goto err_exit; |
| 433 | |
| 434 | for (i = 0; i < 3; i++) |
| 435 | durations.durations[i] = be32_to_cpu(durations.durations[i]); |
| 436 | |
| 437 | for (i = 0; i < 4; i++) |
| 438 | timeouts.timeouts[i] = be32_to_cpu(timeouts.timeouts[i]); |
| 439 | |
| 440 | dprintf(DEBUG_tcg, "TCGBIOS: timeouts: %u %u %u %u\n", |
| 441 | timeouts.timeouts[0], |
| 442 | timeouts.timeouts[1], |
| 443 | timeouts.timeouts[2], |
| 444 | timeouts.timeouts[3]); |
| 445 | |
| 446 | dprintf(DEBUG_tcg, "TCGBIOS: durations: %u %u %u\n", |
| 447 | durations.durations[0], |
| 448 | durations.durations[1], |
| 449 | durations.durations[2]); |
| 450 | |
| 451 | |
| 452 | td->set_timeouts(timeouts.timeouts, durations.durations); |
| 453 | |
| 454 | return 0; |
| 455 | |
| 456 | err_exit: |
| 457 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 458 | |
Stefan Berger | 7fce1d9 | 2015-11-12 10:14:45 -0500 | [diff] [blame] | 459 | tpm_set_failure(); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 460 | if (rc) |
| 461 | return rc; |
| 462 | return TCG_TCG_COMMAND_ERROR; |
| 463 | } |
| 464 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 465 | static u32 |
Kevin O'Connor | 4e7cf9c | 2015-11-22 18:51:31 -0500 | [diff] [blame] | 466 | tpm_log_extend_event(struct pcpes *pcpes, const void *event) |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 467 | { |
Kevin O'Connor | f4820ac | 2015-11-22 11:00:06 -0500 | [diff] [blame] | 468 | if (!has_working_tpm()) |
| 469 | return TCG_GENERAL_ERROR; |
| 470 | |
Kevin O'Connor | 4e7cf9c | 2015-11-22 18:51:31 -0500 | [diff] [blame] | 471 | if (pcpes->pcrindex >= 24) |
| 472 | return TCG_INVALID_INPUT_PARA; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 473 | |
Kevin O'Connor | 948f3c9 | 2015-11-22 19:16:16 -0500 | [diff] [blame] | 474 | struct tpm_req_extend tre = { |
| 475 | .tag = cpu_to_be16(TPM_TAG_RQU_CMD), |
| 476 | .totlen = cpu_to_be32(sizeof(tre)), |
| 477 | .ordinal = cpu_to_be32(TPM_ORD_Extend), |
| 478 | .pcrindex = cpu_to_be32(pcpes->pcrindex), |
| 479 | }; |
| 480 | memcpy(tre.digest, pcpes->digest, sizeof(tre.digest)); |
| 481 | |
| 482 | struct tpm_rsp_extend rsp; |
| 483 | u32 resp_length = sizeof(rsp); |
| 484 | u32 rc = transmit(0, (void*)&tre, &rsp, &resp_length, |
| 485 | TPM_DURATION_TYPE_SHORT); |
| 486 | if (rc || resp_length != sizeof(rsp)) { |
Kevin O'Connor | 4e7cf9c | 2015-11-22 18:51:31 -0500 | [diff] [blame] | 487 | tpm_set_failure(); |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 488 | return rc; |
Kevin O'Connor | 4e7cf9c | 2015-11-22 18:51:31 -0500 | [diff] [blame] | 489 | } |
Kevin O'Connor | 948f3c9 | 2015-11-22 19:16:16 -0500 | [diff] [blame] | 490 | |
| 491 | rc = tpm_log_event(pcpes, event); |
| 492 | if (rc) |
| 493 | tpm_set_failure(); |
| 494 | return rc; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 495 | } |
| 496 | |
Kevin O'Connor | 9224440 | 2015-11-22 16:54:18 -0500 | [diff] [blame] | 497 | static void |
| 498 | tpm_fill_hash(struct pcpes *pcpes, const void *hashdata, u32 hashdata_length) |
| 499 | { |
| 500 | if (hashdata) |
| 501 | sha1(hashdata, hashdata_length, pcpes->digest); |
| 502 | } |
| 503 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 504 | /* |
| 505 | * Add a measurement to the log; the data at data_seg:data/length are |
| 506 | * appended to the TCG_PCClientPCREventStruct |
| 507 | * |
| 508 | * Input parameters: |
| 509 | * pcrindex : which PCR to extend |
| 510 | * event_type : type of event; specs section on 'Event Types' |
| 511 | * event : pointer to info (e.g., string) to be added to log as-is |
| 512 | * event_length: length of the event |
| 513 | * hashdata : pointer to the data to be hashed |
| 514 | * hashdata_length: length of the data to be hashed |
| 515 | */ |
| 516 | static u32 |
| 517 | tpm_add_measurement_to_log(u32 pcrindex, u32 event_type, |
| 518 | const char *event, u32 event_length, |
| 519 | const u8 *hashdata, u32 hashdata_length) |
| 520 | { |
| 521 | struct pcpes pcpes = { |
| 522 | .pcrindex = pcrindex, |
| 523 | .eventtype = event_type, |
Kevin O'Connor | 7bf7738 | 2015-11-22 17:28:36 -0500 | [diff] [blame] | 524 | .eventdatasize = event_length, |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 525 | }; |
Kevin O'Connor | 9224440 | 2015-11-22 16:54:18 -0500 | [diff] [blame] | 526 | tpm_fill_hash(&pcpes, hashdata, hashdata_length); |
Kevin O'Connor | 7bf7738 | 2015-11-22 17:28:36 -0500 | [diff] [blame] | 527 | return tpm_log_extend_event(&pcpes, event); |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 528 | } |
| 529 | |
| 530 | |
| 531 | /**************************************************************** |
| 532 | * Setup and Measurements |
| 533 | ****************************************************************/ |
| 534 | |
Kevin O'Connor | a617542 | 2015-11-22 11:28:14 -0500 | [diff] [blame] | 535 | // Add an EV_ACTION measurement to the list of measurements |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 536 | static u32 |
Kevin O'Connor | a617542 | 2015-11-22 11:28:14 -0500 | [diff] [blame] | 537 | tpm_add_action(u32 pcrIndex, const char *string) |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 538 | { |
Kevin O'Connor | a617542 | 2015-11-22 11:28:14 -0500 | [diff] [blame] | 539 | u32 len = strlen(string); |
| 540 | return tpm_add_measurement_to_log(pcrIndex, EV_ACTION, |
| 541 | string, len, (u8 *)string, len); |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 542 | } |
| 543 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 544 | /* |
| 545 | * Add event separators for PCRs 0 to 7; specs on 'Measuring Boot Events' |
| 546 | */ |
| 547 | static u32 |
| 548 | tpm_add_event_separators(void) |
| 549 | { |
| 550 | u32 rc; |
| 551 | u32 pcrIndex = 0; |
| 552 | |
| 553 | if (!CONFIG_TCGBIOS) |
| 554 | return 0; |
| 555 | |
| 556 | if (!has_working_tpm()) |
| 557 | return TCG_GENERAL_ERROR; |
| 558 | |
Kevin O'Connor | a617542 | 2015-11-22 11:28:14 -0500 | [diff] [blame] | 559 | static const u8 evt_separator[] = {0xff,0xff,0xff,0xff}; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 560 | while (pcrIndex <= 7) { |
Kevin O'Connor | a617542 | 2015-11-22 11:28:14 -0500 | [diff] [blame] | 561 | rc = tpm_add_measurement_to_log(pcrIndex, EV_SEPARATOR, |
| 562 | NULL, 0, |
| 563 | (u8 *)evt_separator, |
| 564 | sizeof(evt_separator)); |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 565 | if (rc) |
| 566 | break; |
| 567 | pcrIndex ++; |
| 568 | } |
| 569 | |
| 570 | return rc; |
| 571 | } |
| 572 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 573 | static u32 |
| 574 | tpm_smbios_measure(void) |
| 575 | { |
| 576 | if (!CONFIG_TCGBIOS) |
| 577 | return 0; |
| 578 | |
| 579 | if (!has_working_tpm()) |
| 580 | return TCG_GENERAL_ERROR; |
| 581 | |
| 582 | u32 rc; |
| 583 | struct pcctes pcctes = { |
| 584 | .eventid = 1, |
| 585 | .eventdatasize = SHA1_BUFSIZE, |
| 586 | }; |
| 587 | struct smbios_entry_point *sep = SMBiosAddr; |
| 588 | |
| 589 | dprintf(DEBUG_tcg, "TCGBIOS: SMBIOS at %p\n", sep); |
| 590 | |
| 591 | if (!sep) |
| 592 | return 0; |
| 593 | |
| 594 | rc = sha1((const u8 *)sep->structure_table_address, |
| 595 | sep->structure_table_length, pcctes.digest); |
| 596 | if (rc) |
| 597 | return rc; |
| 598 | |
| 599 | return tpm_add_measurement_to_log(1, |
| 600 | EV_EVENT_TAG, |
| 601 | (const char *)&pcctes, sizeof(pcctes), |
| 602 | (u8 *)&pcctes, sizeof(pcctes)); |
| 603 | } |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 604 | |
| 605 | static u32 |
| 606 | tpm_startup(void) |
| 607 | { |
| 608 | u32 rc; |
| 609 | u32 returnCode; |
| 610 | |
| 611 | if (!has_working_tpm()) |
| 612 | return TCG_GENERAL_ERROR; |
| 613 | |
| 614 | dprintf(DEBUG_tcg, "TCGBIOS: Starting with TPM_Startup(ST_CLEAR)\n"); |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 615 | rc = build_and_send_cmd(0, TPM_ORD_Startup, |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 616 | Startup_ST_CLEAR, sizeof(Startup_ST_CLEAR), |
Stefan Berger | fc2e715 | 2015-06-09 19:56:31 -0400 | [diff] [blame] | 617 | NULL, 0, &returnCode, TPM_DURATION_TYPE_SHORT); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 618 | |
| 619 | dprintf(DEBUG_tcg, "Return code from TPM_Startup = 0x%08x\n", |
| 620 | returnCode); |
| 621 | |
| 622 | if (CONFIG_COREBOOT) { |
| 623 | /* with other firmware on the system the TPM may already have been |
| 624 | * initialized |
| 625 | */ |
| 626 | if (returnCode == TPM_INVALID_POSTINIT) |
| 627 | returnCode = 0; |
| 628 | } |
| 629 | |
| 630 | if (rc || returnCode) |
| 631 | goto err_exit; |
| 632 | |
Stefan Berger | ec42c8d | 2015-11-21 14:54:41 -0500 | [diff] [blame] | 633 | rc = determine_timeouts(); |
| 634 | if (rc) |
| 635 | goto err_exit; |
| 636 | |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 637 | rc = build_and_send_cmd(0, TPM_ORD_SelfTestFull, NULL, 0, |
Stefan Berger | fc2e715 | 2015-06-09 19:56:31 -0400 | [diff] [blame] | 638 | NULL, 0, &returnCode, TPM_DURATION_TYPE_LONG); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 639 | |
| 640 | dprintf(DEBUG_tcg, "Return code from TPM_SelfTestFull = 0x%08x\n", |
| 641 | returnCode); |
| 642 | |
| 643 | if (rc || returnCode) |
| 644 | goto err_exit; |
| 645 | |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 646 | rc = build_and_send_cmd(3, TSC_ORD_ResetEstablishmentBit, NULL, 0, |
Stefan Berger | fc2e715 | 2015-06-09 19:56:31 -0400 | [diff] [blame] | 647 | NULL, 0, &returnCode, TPM_DURATION_TYPE_SHORT); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 648 | |
| 649 | dprintf(DEBUG_tcg, "Return code from TSC_ResetEstablishmentBit = 0x%08x\n", |
| 650 | returnCode); |
| 651 | |
| 652 | if (rc || (returnCode != 0 && returnCode != TPM_BAD_LOCALITY)) |
| 653 | goto err_exit; |
| 654 | |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 655 | rc = tpm_smbios_measure(); |
| 656 | if (rc) |
| 657 | goto err_exit; |
| 658 | |
Kevin O'Connor | 1257533 | 2015-11-22 11:34:38 -0500 | [diff] [blame] | 659 | rc = tpm_add_action(2, "Start Option ROM Scan"); |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 660 | if (rc) |
| 661 | goto err_exit; |
| 662 | |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 663 | return 0; |
| 664 | |
| 665 | err_exit: |
| 666 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 667 | |
Stefan Berger | 7fce1d9 | 2015-11-12 10:14:45 -0500 | [diff] [blame] | 668 | tpm_set_failure(); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 669 | if (rc) |
| 670 | return rc; |
| 671 | return TCG_TCG_COMMAND_ERROR; |
| 672 | } |
| 673 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 674 | /* |
| 675 | initialize the TCPA ACPI subsystem; find the ACPI tables and determine |
| 676 | where the TCPA table is. |
| 677 | */ |
| 678 | static void |
| 679 | tpm_acpi_init(void) |
| 680 | { |
| 681 | tpm_state.if_shutdown = 0; |
| 682 | tpm_state.tpm_probed = 0; |
| 683 | tpm_state.tpm_found = 0; |
| 684 | tpm_state.tpm_working = 0; |
| 685 | |
| 686 | if (!has_working_tpm()) { |
| 687 | tpm_state.if_shutdown = 1; |
| 688 | return; |
| 689 | } |
| 690 | |
| 691 | reset_acpi_log(); |
| 692 | } |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 693 | |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 694 | void |
| 695 | tpm_setup(void) |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 696 | { |
| 697 | if (!CONFIG_TCGBIOS) |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 698 | return; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 699 | |
| 700 | tpm_acpi_init(); |
Quan Xu | 6764395 | 2015-04-30 19:43:04 -0400 | [diff] [blame] | 701 | if (runningOnXen()) |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 702 | return; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 703 | |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 704 | tpm_startup(); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 705 | } |
| 706 | |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 707 | void |
| 708 | tpm_prepboot(void) |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 709 | { |
| 710 | u32 rc; |
| 711 | u32 returnCode; |
| 712 | |
| 713 | if (!CONFIG_TCGBIOS) |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 714 | return; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 715 | |
| 716 | if (!has_working_tpm()) |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 717 | return; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 718 | |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 719 | rc = build_and_send_cmd(0, TPM_ORD_PhysicalPresence, |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 720 | PhysicalPresence_CMD_ENABLE, |
| 721 | sizeof(PhysicalPresence_CMD_ENABLE), |
Stefan Berger | fc2e715 | 2015-06-09 19:56:31 -0400 | [diff] [blame] | 722 | NULL, 0, &returnCode, TPM_DURATION_TYPE_SHORT); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 723 | if (rc || returnCode) |
| 724 | goto err_exit; |
| 725 | |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 726 | rc = build_and_send_cmd(0, TPM_ORD_PhysicalPresence, |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 727 | PhysicalPresence_NOT_PRESENT_LOCK, |
| 728 | sizeof(PhysicalPresence_NOT_PRESENT_LOCK), |
Stefan Berger | fc2e715 | 2015-06-09 19:56:31 -0400 | [diff] [blame] | 729 | NULL, 0, &returnCode, TPM_DURATION_TYPE_SHORT); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 730 | if (rc || returnCode) |
| 731 | goto err_exit; |
| 732 | |
Kevin O'Connor | 1257533 | 2015-11-22 11:34:38 -0500 | [diff] [blame] | 733 | rc = tpm_add_action(4, "Calling INT 19h"); |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 734 | if (rc) |
| 735 | goto err_exit; |
| 736 | |
| 737 | rc = tpm_add_event_separators(); |
| 738 | if (rc) |
| 739 | goto err_exit; |
| 740 | |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 741 | return; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 742 | |
| 743 | err_exit: |
| 744 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 745 | |
Stefan Berger | 7fce1d9 | 2015-11-12 10:14:45 -0500 | [diff] [blame] | 746 | tpm_set_failure(); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 747 | } |
| 748 | |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 749 | /* |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 750 | * Add measurement to the log about an option rom |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 751 | */ |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 752 | u32 |
| 753 | tpm_option_rom(const void *addr, u32 len) |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 754 | { |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 755 | if (!CONFIG_TCGBIOS) |
| 756 | return 0; |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 757 | |
Stefan Berger | 7fce1d9 | 2015-11-12 10:14:45 -0500 | [diff] [blame] | 758 | if (!has_working_tpm()) |
| 759 | return TCG_GENERAL_ERROR; |
| 760 | |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 761 | u32 rc; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 762 | struct pcctes_romex pcctes = { |
| 763 | .eventid = 7, |
| 764 | .eventdatasize = sizeof(u16) + sizeof(u16) + SHA1_BUFSIZE, |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 765 | }; |
| 766 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 767 | rc = sha1((const u8 *)addr, len, pcctes.digest); |
Stefan Berger | 6c376b4 | 2015-11-12 10:14:49 -0500 | [diff] [blame] | 768 | if (rc) |
| 769 | return rc; |
| 770 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 771 | return tpm_add_measurement_to_log(2, |
| 772 | EV_EVENT_TAG, |
| 773 | (const char *)&pcctes, sizeof(pcctes), |
| 774 | (u8 *)&pcctes, sizeof(pcctes)); |
Stefan Berger | 6c376b4 | 2015-11-12 10:14:49 -0500 | [diff] [blame] | 775 | } |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 776 | |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 777 | u32 |
| 778 | tpm_add_bcv(u32 bootdrv, const u8 *addr, u32 length) |
| 779 | { |
| 780 | if (!CONFIG_TCGBIOS) |
| 781 | return 0; |
| 782 | |
| 783 | if (!has_working_tpm()) |
| 784 | return TCG_GENERAL_ERROR; |
| 785 | |
Stefan Berger | 4cdbc41 | 2015-11-30 11:14:18 -0500 | [diff] [blame] | 786 | if (length < 0x200) |
| 787 | return TCG_INVALID_INPUT_PARA; |
| 788 | |
Kevin O'Connor | 8bd4a08 | 2015-11-19 17:43:27 -0500 | [diff] [blame] | 789 | const char *string = "Booting BCV device 00h (Floppy)"; |
| 790 | if (bootdrv == 0x80) |
| 791 | string = "Booting BCV device 80h (HDD)"; |
| 792 | u32 rc = tpm_add_action(4, string); |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 793 | if (rc) |
| 794 | return rc; |
| 795 | |
Kevin O'Connor | 7ea191b | 2015-11-22 11:15:51 -0500 | [diff] [blame] | 796 | /* specs: see section 'Hard Disk Device or Hard Disk-Like Devices' */ |
| 797 | /* equivalent to: dd if=/dev/hda ibs=1 count=440 | sha1sum */ |
Kevin O'Connor | 8bd4a08 | 2015-11-19 17:43:27 -0500 | [diff] [blame] | 798 | string = "MBR"; |
Kevin O'Connor | 7ea191b | 2015-11-22 11:15:51 -0500 | [diff] [blame] | 799 | rc = tpm_add_measurement_to_log(4, EV_IPL, |
| 800 | string, strlen(string), |
| 801 | addr, 0x1b8); |
| 802 | if (rc) |
| 803 | return rc; |
| 804 | |
| 805 | /* equivalent to: dd if=/dev/hda ibs=1 count=72 skip=440 | sha1sum */ |
| 806 | string = "MBR PARTITION_TABLE"; |
| 807 | return tpm_add_measurement_to_log(5, EV_IPL_PARTITION_DATA, |
| 808 | string, strlen(string), |
| 809 | addr + 0x1b8, 0x48); |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 810 | } |
| 811 | |
| 812 | u32 |
| 813 | tpm_add_cdrom(u32 bootdrv, const u8 *addr, u32 length) |
| 814 | { |
| 815 | if (!CONFIG_TCGBIOS) |
| 816 | return 0; |
| 817 | |
| 818 | if (!has_working_tpm()) |
| 819 | return TCG_GENERAL_ERROR; |
| 820 | |
Kevin O'Connor | 8bd4a08 | 2015-11-19 17:43:27 -0500 | [diff] [blame] | 821 | u32 rc = tpm_add_action(4, "Booting from CD ROM device"); |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 822 | if (rc) |
| 823 | return rc; |
| 824 | |
Kevin O'Connor | 7ea191b | 2015-11-22 11:15:51 -0500 | [diff] [blame] | 825 | /* specs: see section 'El Torito' */ |
| 826 | const char *string = "EL TORITO IPL"; |
| 827 | return tpm_add_measurement_to_log(4, EV_IPL, |
| 828 | string, strlen(string), |
| 829 | addr, length); |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 830 | } |
| 831 | |
| 832 | u32 |
| 833 | tpm_add_cdrom_catalog(const u8 *addr, u32 length) |
| 834 | { |
| 835 | if (!CONFIG_TCGBIOS) |
| 836 | return 0; |
| 837 | |
| 838 | if (!has_working_tpm()) |
| 839 | return TCG_GENERAL_ERROR; |
| 840 | |
Kevin O'Connor | 8bd4a08 | 2015-11-19 17:43:27 -0500 | [diff] [blame] | 841 | u32 rc = tpm_add_action(4, "Booting from CD ROM device"); |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 842 | if (rc) |
| 843 | return rc; |
| 844 | |
Kevin O'Connor | 7ea191b | 2015-11-22 11:15:51 -0500 | [diff] [blame] | 845 | /* specs: see section 'El Torito' */ |
| 846 | const char *string = "BOOT CATALOG"; |
| 847 | return tpm_add_measurement_to_log(5, EV_IPL_PARTITION_DATA, |
| 848 | string, strlen(string), |
| 849 | addr, length); |
Stefan Berger | 2aff1c1 | 2015-05-26 15:48:33 -0400 | [diff] [blame] | 850 | } |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 851 | |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 852 | void |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 853 | tpm_s3_resume(void) |
| 854 | { |
| 855 | u32 rc; |
| 856 | u32 returnCode; |
| 857 | |
| 858 | if (!CONFIG_TCGBIOS) |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 859 | return; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 860 | |
| 861 | if (!has_working_tpm()) |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 862 | return; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 863 | |
| 864 | dprintf(DEBUG_tcg, "TCGBIOS: Resuming with TPM_Startup(ST_STATE)\n"); |
| 865 | |
Stefan Berger | 5aa2a75 | 2015-03-23 14:22:17 -0400 | [diff] [blame] | 866 | rc = build_and_send_cmd(0, TPM_ORD_Startup, |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 867 | Startup_ST_STATE, sizeof(Startup_ST_STATE), |
Stefan Berger | fc2e715 | 2015-06-09 19:56:31 -0400 | [diff] [blame] | 868 | NULL, 0, &returnCode, TPM_DURATION_TYPE_SHORT); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 869 | |
| 870 | dprintf(DEBUG_tcg, "TCGBIOS: ReturnCode from TPM_Startup = 0x%08x\n", |
| 871 | returnCode); |
| 872 | |
| 873 | if (rc || returnCode) |
| 874 | goto err_exit; |
| 875 | |
Kevin O'Connor | d6aca44 | 2015-06-10 11:00:17 -0400 | [diff] [blame] | 876 | return; |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 877 | |
| 878 | err_exit: |
| 879 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 880 | |
Stefan Berger | 7fce1d9 | 2015-11-12 10:14:45 -0500 | [diff] [blame] | 881 | tpm_set_failure(); |
Stefan Berger | b310dfa | 2015-03-23 14:22:16 -0400 | [diff] [blame] | 882 | } |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 883 | |
| 884 | |
| 885 | /**************************************************************** |
| 886 | * BIOS interface |
| 887 | ****************************************************************/ |
| 888 | |
| 889 | static inline void *input_buf32(struct bregs *regs) |
| 890 | { |
| 891 | return MAKE_FLATPTR(regs->es, regs->di); |
| 892 | } |
| 893 | |
| 894 | static inline void *output_buf32(struct bregs *regs) |
| 895 | { |
| 896 | return MAKE_FLATPTR(regs->ds, regs->si); |
| 897 | } |
| 898 | |
| 899 | static u32 |
| 900 | hash_log_extend_event_int(const struct hleei_short *hleei_s, |
| 901 | struct hleeo *hleeo) |
| 902 | { |
| 903 | u32 rc = 0; |
| 904 | struct hleo hleo; |
| 905 | struct hleei_long *hleei_l = (struct hleei_long *)hleei_s; |
| 906 | const void *logdataptr; |
| 907 | u32 logdatalen; |
| 908 | struct pcpes *pcpes; |
| 909 | u32 pcrindex; |
| 910 | |
| 911 | if (is_preboot_if_shutdown() != 0) { |
| 912 | rc = TCG_INTERFACE_SHUTDOWN; |
| 913 | goto err_exit; |
| 914 | } |
| 915 | |
| 916 | /* short or long version? */ |
| 917 | switch (hleei_s->ipblength) { |
| 918 | case sizeof(struct hleei_short): |
| 919 | /* short */ |
| 920 | logdataptr = hleei_s->logdataptr; |
| 921 | logdatalen = hleei_s->logdatalen; |
| 922 | pcrindex = hleei_s->pcrindex; |
| 923 | break; |
| 924 | |
| 925 | case sizeof(struct hleei_long): |
| 926 | /* long */ |
| 927 | logdataptr = hleei_l->logdataptr; |
| 928 | logdatalen = hleei_l->logdatalen; |
| 929 | pcrindex = hleei_l->pcrindex; |
| 930 | break; |
| 931 | |
| 932 | default: |
| 933 | /* bad input block */ |
| 934 | rc = TCG_INVALID_INPUT_PARA; |
| 935 | goto err_exit; |
| 936 | } |
| 937 | |
| 938 | pcpes = (struct pcpes *)logdataptr; |
| 939 | |
Kevin O'Connor | 7bf7738 | 2015-11-22 17:28:36 -0500 | [diff] [blame] | 940 | if (pcpes->pcrindex >= 24 || pcpes->pcrindex != pcrindex |
| 941 | || logdatalen != sizeof(*pcpes) + pcpes->eventdatasize) { |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 942 | rc = TCG_INVALID_INPUT_PARA; |
| 943 | goto err_exit; |
| 944 | } |
| 945 | |
Kevin O'Connor | 9224440 | 2015-11-22 16:54:18 -0500 | [diff] [blame] | 946 | tpm_fill_hash(pcpes, hleei_s->hashdataptr, hleei_s->hashdatalen); |
Kevin O'Connor | 7bf7738 | 2015-11-22 17:28:36 -0500 | [diff] [blame] | 947 | rc = tpm_log_extend_event(pcpes, pcpes->event); |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 948 | if (rc) |
| 949 | goto err_exit; |
| 950 | |
| 951 | hleeo->opblength = sizeof(struct hleeo); |
| 952 | hleeo->reserved = 0; |
| 953 | hleeo->eventnumber = hleo.eventnumber; |
| 954 | |
| 955 | err_exit: |
| 956 | if (rc != 0) { |
| 957 | hleeo->opblength = 4; |
| 958 | hleeo->reserved = 0; |
| 959 | } |
| 960 | |
| 961 | return rc; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 962 | } |
| 963 | |
| 964 | static u32 |
| 965 | pass_through_to_tpm_int(struct pttti *pttti, struct pttto *pttto) |
| 966 | { |
| 967 | u32 rc = 0; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 968 | |
| 969 | if (is_preboot_if_shutdown()) { |
| 970 | rc = TCG_INTERFACE_SHUTDOWN; |
| 971 | goto err_exit; |
| 972 | } |
| 973 | |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 974 | struct tpm_req_header *trh = (void*)pttti->tpmopin; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 975 | |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 976 | if (pttti->ipblength < sizeof(struct pttti) + sizeof(trh) |
| 977 | || pttti->ipblength != sizeof(struct pttti) + be32_to_cpu(trh->totlen) |
| 978 | || pttti->opblength < sizeof(struct pttto)) { |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 979 | rc = TCG_INVALID_INPUT_PARA; |
| 980 | goto err_exit; |
| 981 | } |
| 982 | |
Kevin O'Connor | 7ba0568 | 2015-11-22 18:21:45 -0500 | [diff] [blame] | 983 | u32 resbuflen = pttti->opblength - offsetof(struct pttto, tpmopout); |
| 984 | rc = transmit(0, trh, pttto->tpmopout, &resbuflen, |
| 985 | TPM_DURATION_TYPE_LONG /* worst case */); |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 986 | if (rc) |
| 987 | goto err_exit; |
| 988 | |
| 989 | pttto->opblength = offsetof(struct pttto, tpmopout) + resbuflen; |
| 990 | pttto->reserved = 0; |
| 991 | |
| 992 | err_exit: |
| 993 | if (rc != 0) { |
| 994 | pttto->opblength = 4; |
| 995 | pttto->reserved = 0; |
| 996 | } |
| 997 | |
| 998 | return rc; |
| 999 | } |
| 1000 | |
| 1001 | static u32 |
| 1002 | shutdown_preboot_interface(void) |
| 1003 | { |
| 1004 | u32 rc = 0; |
| 1005 | |
| 1006 | if (!is_preboot_if_shutdown()) { |
| 1007 | tpm_state.if_shutdown = 1; |
| 1008 | } else { |
| 1009 | rc = TCG_INTERFACE_SHUTDOWN; |
| 1010 | } |
| 1011 | |
| 1012 | return rc; |
| 1013 | } |
| 1014 | |
| 1015 | static u32 |
| 1016 | hash_log_event_int(const struct hlei *hlei, struct hleo *hleo) |
| 1017 | { |
| 1018 | u32 rc = 0; |
| 1019 | u16 size; |
| 1020 | struct pcpes *pcpes; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 1021 | |
| 1022 | if (is_preboot_if_shutdown() != 0) { |
| 1023 | rc = TCG_INTERFACE_SHUTDOWN; |
| 1024 | goto err_exit; |
| 1025 | } |
| 1026 | |
| 1027 | size = hlei->ipblength; |
| 1028 | if (size != sizeof(*hlei)) { |
| 1029 | rc = TCG_INVALID_INPUT_PARA; |
| 1030 | goto err_exit; |
| 1031 | } |
| 1032 | |
| 1033 | pcpes = (struct pcpes *)hlei->logdataptr; |
| 1034 | |
Kevin O'Connor | 7bf7738 | 2015-11-22 17:28:36 -0500 | [diff] [blame] | 1035 | if (pcpes->pcrindex >= 24 || pcpes->pcrindex != hlei->pcrindex |
| 1036 | || pcpes->eventtype != hlei->logeventtype |
| 1037 | || hlei->logdatalen != sizeof(*pcpes) + pcpes->eventdatasize) { |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 1038 | rc = TCG_INVALID_INPUT_PARA; |
| 1039 | goto err_exit; |
| 1040 | } |
| 1041 | |
Kevin O'Connor | 9224440 | 2015-11-22 16:54:18 -0500 | [diff] [blame] | 1042 | tpm_fill_hash(pcpes, hlei->hashdataptr, hlei->hashdatalen); |
Kevin O'Connor | 7bf7738 | 2015-11-22 17:28:36 -0500 | [diff] [blame] | 1043 | rc = tpm_log_event(pcpes, pcpes->event); |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 1044 | if (rc) |
| 1045 | goto err_exit; |
| 1046 | |
| 1047 | /* updating the log was fine */ |
| 1048 | hleo->opblength = sizeof(struct hleo); |
| 1049 | hleo->reserved = 0; |
Kevin O'Connor | 5afdced | 2015-11-22 16:39:59 -0500 | [diff] [blame] | 1050 | hleo->eventnumber = tpm_state.entry_count; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 1051 | |
| 1052 | err_exit: |
| 1053 | if (rc != 0) { |
| 1054 | hleo->opblength = 2; |
| 1055 | hleo->reserved = 0; |
| 1056 | } |
| 1057 | |
| 1058 | return rc; |
| 1059 | } |
| 1060 | |
| 1061 | static u32 |
| 1062 | hash_all_int(const struct hai *hai, u8 *hash) |
| 1063 | { |
| 1064 | if (is_preboot_if_shutdown() != 0) |
| 1065 | return TCG_INTERFACE_SHUTDOWN; |
| 1066 | |
| 1067 | if (hai->ipblength != sizeof(struct hai) || |
| 1068 | hai->hashdataptr == 0 || |
| 1069 | hai->hashdatalen == 0 || |
| 1070 | hai->algorithmid != TPM_ALG_SHA) |
| 1071 | return TCG_INVALID_INPUT_PARA; |
| 1072 | |
| 1073 | return sha1((const u8 *)hai->hashdataptr, hai->hashdatalen, hash); |
| 1074 | } |
| 1075 | |
| 1076 | static u32 |
| 1077 | tss_int(struct ti *ti, struct to *to) |
| 1078 | { |
| 1079 | u32 rc = 0; |
| 1080 | |
| 1081 | if (is_preboot_if_shutdown() == 0) { |
| 1082 | rc = TCG_PC_UNSUPPORTED; |
| 1083 | } else { |
| 1084 | rc = TCG_INTERFACE_SHUTDOWN; |
| 1085 | } |
| 1086 | |
| 1087 | to->opblength = sizeof(struct to); |
| 1088 | to->reserved = 0; |
| 1089 | |
| 1090 | return rc; |
| 1091 | } |
| 1092 | |
| 1093 | static u32 |
| 1094 | compact_hash_log_extend_event_int(u8 *buffer, |
| 1095 | u32 info, |
| 1096 | u32 length, |
| 1097 | u32 pcrindex, |
| 1098 | u32 *edx_ptr) |
| 1099 | { |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 1100 | struct pcpes pcpes = { |
| 1101 | .pcrindex = pcrindex, |
| 1102 | .eventtype = EV_COMPACT_HASH, |
| 1103 | .eventdatasize = sizeof(info), |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 1104 | }; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 1105 | |
| 1106 | if (is_preboot_if_shutdown() != 0) |
| 1107 | return TCG_INTERFACE_SHUTDOWN; |
| 1108 | |
Kevin O'Connor | 9224440 | 2015-11-22 16:54:18 -0500 | [diff] [blame] | 1109 | tpm_fill_hash(&pcpes, buffer, length); |
Kevin O'Connor | 7bf7738 | 2015-11-22 17:28:36 -0500 | [diff] [blame] | 1110 | u32 rc = tpm_log_extend_event(&pcpes, &info); |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 1111 | if (rc == 0) |
Kevin O'Connor | 5afdced | 2015-11-22 16:39:59 -0500 | [diff] [blame] | 1112 | *edx_ptr = tpm_state.entry_count; |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 1113 | |
| 1114 | return rc; |
| 1115 | } |
| 1116 | |
| 1117 | void VISIBLE32FLAT |
| 1118 | tpm_interrupt_handler32(struct bregs *regs) |
| 1119 | { |
| 1120 | if (!CONFIG_TCGBIOS) |
| 1121 | return; |
| 1122 | |
| 1123 | set_cf(regs, 0); |
| 1124 | |
Kevin O'Connor | f51c50a | 2015-11-22 10:57:52 -0500 | [diff] [blame] | 1125 | switch ((enum irq_ids)regs->al) { |
| 1126 | case TCG_StatusCheck: |
| 1127 | if (is_tpm_present() == 0) { |
| 1128 | /* no TPM available */ |
| 1129 | regs->eax = TCG_PC_TPM_NOT_PRESENT; |
| 1130 | } else { |
| 1131 | regs->eax = 0; |
| 1132 | regs->ebx = TCG_MAGIC; |
| 1133 | regs->ch = TCG_VERSION_MAJOR; |
| 1134 | regs->cl = TCG_VERSION_MINOR; |
| 1135 | regs->edx = 0x0; |
| 1136 | regs->esi = (u32)tpm_state.log_area_start_address; |
| 1137 | regs->edi = (u32)tpm_state.log_area_last_entry; |
| 1138 | } |
| 1139 | break; |
| 1140 | |
| 1141 | case TCG_HashLogExtendEvent: |
| 1142 | regs->eax = |
| 1143 | hash_log_extend_event_int( |
| 1144 | (struct hleei_short *)input_buf32(regs), |
| 1145 | (struct hleeo *)output_buf32(regs)); |
| 1146 | break; |
| 1147 | |
| 1148 | case TCG_PassThroughToTPM: |
| 1149 | regs->eax = |
| 1150 | pass_through_to_tpm_int((struct pttti *)input_buf32(regs), |
| 1151 | (struct pttto *)output_buf32(regs)); |
| 1152 | break; |
| 1153 | |
| 1154 | case TCG_ShutdownPreBootInterface: |
| 1155 | regs->eax = shutdown_preboot_interface(); |
| 1156 | break; |
| 1157 | |
| 1158 | case TCG_HashLogEvent: |
| 1159 | regs->eax = hash_log_event_int((struct hlei*)input_buf32(regs), |
| 1160 | (struct hleo*)output_buf32(regs)); |
| 1161 | break; |
| 1162 | |
| 1163 | case TCG_HashAll: |
| 1164 | regs->eax = |
| 1165 | hash_all_int((struct hai*)input_buf32(regs), |
| 1166 | (u8 *)output_buf32(regs)); |
| 1167 | break; |
| 1168 | |
| 1169 | case TCG_TSS: |
| 1170 | regs->eax = tss_int((struct ti*)input_buf32(regs), |
| 1171 | (struct to*)output_buf32(regs)); |
| 1172 | break; |
| 1173 | |
| 1174 | case TCG_CompactHashLogExtendEvent: |
| 1175 | regs->eax = |
| 1176 | compact_hash_log_extend_event_int((u8 *)input_buf32(regs), |
| 1177 | regs->esi, |
| 1178 | regs->ecx, |
| 1179 | regs->edx, |
| 1180 | ®s->edx); |
| 1181 | break; |
| 1182 | |
| 1183 | default: |
| 1184 | set_cf(regs, 1); |
| 1185 | } |
| 1186 | |
| 1187 | return; |
| 1188 | } |
Stefan Berger | 320df85 | 2015-11-30 11:14:19 -0500 | [diff] [blame^] | 1189 | |
| 1190 | static u32 |
| 1191 | read_stclear_flags(char *buf, int buf_len) |
| 1192 | { |
| 1193 | u32 rc; |
| 1194 | u32 returnCode; |
| 1195 | struct tpm_res_getcap_stclear_flags stcf; |
| 1196 | |
| 1197 | memset(buf, 0, buf_len); |
| 1198 | |
| 1199 | rc = build_and_send_cmd(0, TPM_ORD_GetCapability, |
| 1200 | GetCapability_STClear_Flags, |
| 1201 | sizeof(GetCapability_STClear_Flags), |
| 1202 | (u8 *)&stcf, sizeof(stcf), |
| 1203 | &returnCode, TPM_DURATION_TYPE_SHORT); |
| 1204 | |
| 1205 | dprintf(DEBUG_tcg, "TCGBIOS: Return code from TPM_GetCapability() " |
| 1206 | "= 0x%08x\n", returnCode); |
| 1207 | |
| 1208 | if (rc || returnCode) |
| 1209 | goto err_exit; |
| 1210 | |
| 1211 | memcpy(buf, &stcf.stclear_flags, buf_len); |
| 1212 | |
| 1213 | return 0; |
| 1214 | |
| 1215 | err_exit: |
| 1216 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 1217 | |
| 1218 | tpm_set_failure(); |
| 1219 | if (rc) |
| 1220 | return rc; |
| 1221 | return TCG_TCG_COMMAND_ERROR; |
| 1222 | } |
| 1223 | |
| 1224 | static u32 |
| 1225 | assert_physical_presence(int verbose) |
| 1226 | { |
| 1227 | u32 rc = 0; |
| 1228 | u32 returnCode; |
| 1229 | struct tpm_stclear_flags stcf; |
| 1230 | |
| 1231 | rc = read_stclear_flags((char *)&stcf, sizeof(stcf)); |
| 1232 | if (rc) { |
| 1233 | dprintf(DEBUG_tcg, |
| 1234 | "Error reading STClear flags: 0x%08x\n", rc); |
| 1235 | return rc; |
| 1236 | } |
| 1237 | |
| 1238 | if (stcf.flags[STCLEAR_FLAG_IDX_PHYSICAL_PRESENCE]) |
| 1239 | /* physical presence already asserted */ |
| 1240 | return 0; |
| 1241 | |
| 1242 | rc = build_and_send_cmd(0, TPM_ORD_PhysicalPresence, |
| 1243 | PhysicalPresence_CMD_ENABLE, |
| 1244 | sizeof(PhysicalPresence_CMD_ENABLE), |
| 1245 | NULL, 0, &returnCode, TPM_DURATION_TYPE_SHORT); |
| 1246 | |
| 1247 | dprintf(DEBUG_tcg, |
| 1248 | "Return code from TSC_PhysicalPresence(CMD_ENABLE) = 0x%08x\n", |
| 1249 | returnCode); |
| 1250 | |
| 1251 | if (rc || returnCode) { |
| 1252 | if (verbose) |
| 1253 | printf("Error: Could not enable physical presence.\n\n"); |
| 1254 | goto err_exit; |
| 1255 | } |
| 1256 | |
| 1257 | rc = build_and_send_cmd(0, TPM_ORD_PhysicalPresence, |
| 1258 | PhysicalPresence_PRESENT, |
| 1259 | sizeof(PhysicalPresence_PRESENT), |
| 1260 | NULL, 0, &returnCode, TPM_DURATION_TYPE_SHORT); |
| 1261 | |
| 1262 | dprintf(DEBUG_tcg, |
| 1263 | "Return code from TSC_PhysicalPresence(PRESENT) = 0x%08x\n", |
| 1264 | returnCode); |
| 1265 | |
| 1266 | if (rc || returnCode) { |
| 1267 | if (verbose) |
| 1268 | printf("Error: Could not set presence flag.\n\n"); |
| 1269 | goto err_exit; |
| 1270 | } |
| 1271 | |
| 1272 | return 0; |
| 1273 | |
| 1274 | err_exit: |
| 1275 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 1276 | |
| 1277 | tpm_set_failure(); |
| 1278 | if (rc) |
| 1279 | return rc; |
| 1280 | return TCG_TCG_COMMAND_ERROR; |
| 1281 | } |
| 1282 | |
| 1283 | static u32 |
| 1284 | read_permanent_flags(char *buf, int buf_len) |
| 1285 | { |
| 1286 | u32 rc; |
| 1287 | u32 returnCode; |
| 1288 | struct tpm_res_getcap_perm_flags pf; |
| 1289 | |
| 1290 | memset(buf, 0, buf_len); |
| 1291 | |
| 1292 | rc = build_and_send_cmd(0, TPM_ORD_GetCapability, |
| 1293 | GetCapability_Permanent_Flags, |
| 1294 | sizeof(GetCapability_Permanent_Flags), |
| 1295 | (u8 *)&pf, sizeof(pf), |
| 1296 | &returnCode, TPM_DURATION_TYPE_SHORT); |
| 1297 | |
| 1298 | dprintf(DEBUG_tcg, "TCGBIOS: Return code from TPM_GetCapability() " |
| 1299 | "= 0x%08x\n", returnCode); |
| 1300 | |
| 1301 | if (rc || returnCode) |
| 1302 | goto err_exit; |
| 1303 | |
| 1304 | memcpy(buf, &pf.perm_flags, buf_len); |
| 1305 | |
| 1306 | return 0; |
| 1307 | |
| 1308 | err_exit: |
| 1309 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 1310 | |
| 1311 | tpm_set_failure(); |
| 1312 | if (rc) |
| 1313 | return rc; |
| 1314 | return TCG_TCG_COMMAND_ERROR; |
| 1315 | } |
| 1316 | |
| 1317 | static u32 |
| 1318 | read_has_owner(int *has_owner) |
| 1319 | { |
| 1320 | u32 rc; |
| 1321 | u32 returnCode; |
| 1322 | struct tpm_res_getcap_ownerauth oauth; |
| 1323 | |
| 1324 | rc = build_and_send_cmd(0, TPM_ORD_GetCapability, |
| 1325 | GetCapability_OwnerAuth, |
| 1326 | sizeof(GetCapability_OwnerAuth), |
| 1327 | (u8 *)&oauth, sizeof(oauth), |
| 1328 | &returnCode, TPM_DURATION_TYPE_SHORT); |
| 1329 | |
| 1330 | dprintf(DEBUG_tcg, "TCGBIOS: Return code from TPM_GetCapability() " |
| 1331 | "= 0x%08x\n", returnCode); |
| 1332 | |
| 1333 | if (rc || returnCode) |
| 1334 | goto err_exit; |
| 1335 | |
| 1336 | *has_owner = oauth.flag; |
| 1337 | |
| 1338 | return 0; |
| 1339 | |
| 1340 | err_exit: |
| 1341 | dprintf(DEBUG_tcg,"TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 1342 | |
| 1343 | tpm_set_failure(); |
| 1344 | if (rc) |
| 1345 | return rc; |
| 1346 | return TCG_TCG_COMMAND_ERROR; |
| 1347 | } |
| 1348 | |
| 1349 | static u32 |
| 1350 | enable_tpm(int enable, u32 *returnCode, int verbose) |
| 1351 | { |
| 1352 | u32 rc; |
| 1353 | struct tpm_permanent_flags pf; |
| 1354 | |
| 1355 | rc = read_permanent_flags((char *)&pf, sizeof(pf)); |
| 1356 | if (rc) |
| 1357 | return rc; |
| 1358 | |
| 1359 | if (pf.flags[PERM_FLAG_IDX_DISABLE] && !enable) |
| 1360 | return 0; |
| 1361 | |
| 1362 | rc = assert_physical_presence(verbose); |
| 1363 | if (rc) { |
| 1364 | dprintf(DEBUG_tcg, "TCGBIOS: Asserting physical presence failed.\n"); |
| 1365 | return rc; |
| 1366 | } |
| 1367 | |
| 1368 | rc = build_and_send_cmd(0, enable ? TPM_ORD_PhysicalEnable |
| 1369 | : TPM_ORD_PhysicalDisable, |
| 1370 | NULL, 0, NULL, 0, returnCode, |
| 1371 | TPM_DURATION_TYPE_SHORT); |
| 1372 | if (enable) |
| 1373 | dprintf(DEBUG_tcg, "Return code from TPM_PhysicalEnable = 0x%08x\n", |
| 1374 | *returnCode); |
| 1375 | else |
| 1376 | dprintf(DEBUG_tcg, "Return code from TPM_PhysicalDisable = 0x%08x\n", |
| 1377 | *returnCode); |
| 1378 | |
| 1379 | if (rc || *returnCode) |
| 1380 | goto err_exit; |
| 1381 | |
| 1382 | return 0; |
| 1383 | |
| 1384 | err_exit: |
| 1385 | if (enable) |
| 1386 | dprintf(DEBUG_tcg, "TCGBIOS: Enabling the TPM failed.\n"); |
| 1387 | else |
| 1388 | dprintf(DEBUG_tcg, "TCGBIOS: Disabling the TPM failed.\n"); |
| 1389 | |
| 1390 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 1391 | |
| 1392 | tpm_set_failure(); |
| 1393 | if (rc) |
| 1394 | return rc; |
| 1395 | return TCG_TCG_COMMAND_ERROR; |
| 1396 | } |
| 1397 | |
| 1398 | static u32 |
| 1399 | activate_tpm(int activate, int allow_reset, u32 *returnCode, int verbose) |
| 1400 | { |
| 1401 | u32 rc; |
| 1402 | struct tpm_permanent_flags pf; |
| 1403 | |
| 1404 | rc = read_permanent_flags((char *)&pf, sizeof(pf)); |
| 1405 | if (rc) |
| 1406 | return rc; |
| 1407 | |
| 1408 | if (pf.flags[PERM_FLAG_IDX_DEACTIVATED] && !activate) |
| 1409 | return 0; |
| 1410 | |
| 1411 | if (pf.flags[PERM_FLAG_IDX_DISABLE]) |
| 1412 | return 0; |
| 1413 | |
| 1414 | rc = assert_physical_presence(verbose); |
| 1415 | if (rc) { |
| 1416 | dprintf(DEBUG_tcg, "TCGBIOS: Asserting physical presence failed.\n"); |
| 1417 | return rc; |
| 1418 | } |
| 1419 | |
| 1420 | rc = build_and_send_cmd(0, TPM_ORD_PhysicalSetDeactivated, |
| 1421 | activate ? CommandFlag_FALSE |
| 1422 | : CommandFlag_TRUE, |
| 1423 | activate ? sizeof(CommandFlag_FALSE) |
| 1424 | : sizeof(CommandFlag_TRUE), |
| 1425 | NULL, 0, returnCode, TPM_DURATION_TYPE_SHORT); |
| 1426 | |
| 1427 | dprintf(DEBUG_tcg, |
| 1428 | "Return code from PhysicalSetDeactivated(%d) = 0x%08x\n", |
| 1429 | activate ? 0 : 1, *returnCode); |
| 1430 | |
| 1431 | if (rc || *returnCode) |
| 1432 | goto err_exit; |
| 1433 | |
| 1434 | if (activate && allow_reset) { |
| 1435 | if (verbose) { |
| 1436 | printf("Requiring a reboot to activate the TPM.\n"); |
| 1437 | |
| 1438 | msleep(2000); |
| 1439 | } |
| 1440 | reset(); |
| 1441 | } |
| 1442 | |
| 1443 | return 0; |
| 1444 | |
| 1445 | err_exit: |
| 1446 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 1447 | |
| 1448 | tpm_set_failure(); |
| 1449 | if (rc) |
| 1450 | return rc; |
| 1451 | return TCG_TCG_COMMAND_ERROR; |
| 1452 | } |
| 1453 | |
| 1454 | static u32 |
| 1455 | enable_activate(int allow_reset, u32 *returnCode, int verbose) |
| 1456 | { |
| 1457 | u32 rc; |
| 1458 | |
| 1459 | rc = enable_tpm(1, returnCode, verbose); |
| 1460 | if (rc) |
| 1461 | return rc; |
| 1462 | |
| 1463 | rc = activate_tpm(1, allow_reset, returnCode, verbose); |
| 1464 | |
| 1465 | return rc; |
| 1466 | } |
| 1467 | |
| 1468 | static u32 |
| 1469 | force_clear(int enable_activate_before, int enable_activate_after, |
| 1470 | u32 *returnCode, int verbose) |
| 1471 | { |
| 1472 | u32 rc; |
| 1473 | int has_owner; |
| 1474 | |
| 1475 | rc = read_has_owner(&has_owner); |
| 1476 | if (rc) |
| 1477 | return rc; |
| 1478 | if (!has_owner) { |
| 1479 | if (verbose) |
| 1480 | printf("TPM does not have an owner.\n"); |
| 1481 | return 0; |
| 1482 | } |
| 1483 | |
| 1484 | if (enable_activate_before) { |
| 1485 | rc = enable_activate(0, returnCode, verbose); |
| 1486 | if (rc) { |
| 1487 | dprintf(DEBUG_tcg, |
| 1488 | "TCGBIOS: Enabling/activating the TPM failed.\n"); |
| 1489 | return rc; |
| 1490 | } |
| 1491 | } |
| 1492 | |
| 1493 | rc = assert_physical_presence(verbose); |
| 1494 | if (rc) { |
| 1495 | dprintf(DEBUG_tcg, "TCGBIOS: Asserting physical presence failed.\n"); |
| 1496 | return rc; |
| 1497 | } |
| 1498 | |
| 1499 | rc = build_and_send_cmd(0, TPM_ORD_ForceClear, |
| 1500 | NULL, 0, NULL, 0, returnCode, |
| 1501 | TPM_DURATION_TYPE_SHORT); |
| 1502 | |
| 1503 | dprintf(DEBUG_tcg, "Return code from TPM_ForceClear() = 0x%08x\n", |
| 1504 | *returnCode); |
| 1505 | |
| 1506 | if (rc || *returnCode) |
| 1507 | goto err_exit; |
| 1508 | |
| 1509 | if (!enable_activate_after) { |
| 1510 | if (verbose) |
| 1511 | printf("Owner successfully cleared.\n" |
| 1512 | "You will need to enable/activate the TPM again.\n\n"); |
| 1513 | return 0; |
| 1514 | } |
| 1515 | |
| 1516 | enable_activate(1, returnCode, verbose); |
| 1517 | |
| 1518 | return 0; |
| 1519 | |
| 1520 | err_exit: |
| 1521 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 1522 | |
| 1523 | tpm_set_failure(); |
| 1524 | if (rc) |
| 1525 | return rc; |
| 1526 | return TCG_TCG_COMMAND_ERROR; |
| 1527 | } |
| 1528 | |
| 1529 | static u32 |
| 1530 | set_owner_install(int allow, u32 *returnCode, int verbose) |
| 1531 | { |
| 1532 | u32 rc; |
| 1533 | int has_owner; |
| 1534 | struct tpm_permanent_flags pf; |
| 1535 | |
| 1536 | rc = read_has_owner(&has_owner); |
| 1537 | if (rc) |
| 1538 | return rc; |
| 1539 | if (has_owner) { |
| 1540 | if (verbose) |
| 1541 | printf("Must first remove owner.\n"); |
| 1542 | return 0; |
| 1543 | } |
| 1544 | |
| 1545 | rc = read_permanent_flags((char *)&pf, sizeof(pf)); |
| 1546 | if (rc) |
| 1547 | return rc; |
| 1548 | |
| 1549 | if (pf.flags[PERM_FLAG_IDX_DISABLE]) { |
| 1550 | if (verbose) |
| 1551 | printf("TPM must first be enable.\n"); |
| 1552 | return 0; |
| 1553 | } |
| 1554 | |
| 1555 | rc = assert_physical_presence(verbose); |
| 1556 | if (rc) { |
| 1557 | dprintf(DEBUG_tcg, "TCGBIOS: Asserting physical presence failed.\n"); |
| 1558 | return rc; |
| 1559 | } |
| 1560 | |
| 1561 | rc = build_and_send_cmd(0, TPM_ORD_SetOwnerInstall, |
| 1562 | (allow) ? CommandFlag_TRUE : |
| 1563 | CommandFlag_FALSE, |
| 1564 | sizeof(CommandFlag_TRUE), |
| 1565 | NULL, 0, returnCode, TPM_DURATION_TYPE_SHORT); |
| 1566 | |
| 1567 | dprintf(DEBUG_tcg, "Return code from TPM_SetOwnerInstall() = 0x%08x\n", |
| 1568 | *returnCode); |
| 1569 | |
| 1570 | if (rc || *returnCode) |
| 1571 | goto err_exit; |
| 1572 | |
| 1573 | if (verbose) |
| 1574 | printf("Installation of owner %s.\n", allow ? "enabled" : "disabled"); |
| 1575 | |
| 1576 | return 0; |
| 1577 | |
| 1578 | err_exit: |
| 1579 | dprintf(DEBUG_tcg, "TCGBIOS: TPM malfunctioning (line %d).\n", __LINE__); |
| 1580 | tpm_set_failure(); |
| 1581 | if (rc) |
| 1582 | return rc; |
| 1583 | return TCG_TCG_COMMAND_ERROR; |
| 1584 | } |
| 1585 | |
| 1586 | static u32 |
| 1587 | tpm_process_cfg(tpm_ppi_code msgCode, int verbose, u32 *returnCode) |
| 1588 | { |
| 1589 | u32 rc = 0; |
| 1590 | |
| 1591 | switch (msgCode) { |
| 1592 | case TPM_PPI_OP_NOOP: /* no-op */ |
| 1593 | break; |
| 1594 | |
| 1595 | case TPM_PPI_OP_ENABLE: |
| 1596 | rc = enable_tpm(1, returnCode, verbose); |
| 1597 | break; |
| 1598 | |
| 1599 | case TPM_PPI_OP_DISABLE: |
| 1600 | rc = enable_tpm(0, returnCode, verbose); |
| 1601 | break; |
| 1602 | |
| 1603 | case TPM_PPI_OP_ACTIVATE: |
| 1604 | rc = activate_tpm(1, 1, returnCode, verbose); |
| 1605 | break; |
| 1606 | |
| 1607 | case TPM_PPI_OP_DEACTIVATE: |
| 1608 | rc = activate_tpm(0, 1, returnCode, verbose); |
| 1609 | break; |
| 1610 | |
| 1611 | case TPM_PPI_OP_CLEAR: |
| 1612 | rc = force_clear(1, 0, returnCode, verbose); |
| 1613 | break; |
| 1614 | |
| 1615 | case TPM_PPI_OP_SET_OWNERINSTALL_TRUE: |
| 1616 | rc = set_owner_install(1, returnCode, verbose); |
| 1617 | break; |
| 1618 | |
| 1619 | case TPM_PPI_OP_SET_OWNERINSTALL_FALSE: |
| 1620 | rc = set_owner_install(0, returnCode, verbose); |
| 1621 | break; |
| 1622 | |
| 1623 | default: |
| 1624 | break; |
| 1625 | } |
| 1626 | |
| 1627 | if (rc) |
| 1628 | printf("Op %d: An error occurred: 0x%x TPM return code: 0x%x\n", |
| 1629 | msgCode, rc, *returnCode); |
| 1630 | |
| 1631 | return rc; |
| 1632 | } |
| 1633 | |
| 1634 | static int |
| 1635 | get_tpm_state(void) |
| 1636 | { |
| 1637 | int state = 0; |
| 1638 | struct tpm_permanent_flags pf; |
| 1639 | int has_owner; |
| 1640 | |
| 1641 | if (read_permanent_flags((char *)&pf, sizeof(pf)) || |
| 1642 | read_has_owner(&has_owner)) |
| 1643 | return ~0; |
| 1644 | |
| 1645 | if (!pf.flags[PERM_FLAG_IDX_DISABLE]) |
| 1646 | state |= TPM_STATE_ENABLED; |
| 1647 | |
| 1648 | if (!pf.flags[PERM_FLAG_IDX_DEACTIVATED]) |
| 1649 | state |= TPM_STATE_ACTIVE; |
| 1650 | |
| 1651 | if (has_owner) { |
| 1652 | state |= TPM_STATE_OWNED; |
| 1653 | } else { |
| 1654 | if (pf.flags[PERM_FLAG_IDX_OWNERSHIP]) |
| 1655 | state |= TPM_STATE_OWNERINSTALL; |
| 1656 | } |
| 1657 | |
| 1658 | return state; |
| 1659 | } |
| 1660 | |
| 1661 | static void |
| 1662 | show_tpm_menu(int state, int next_scancodes[7]) |
| 1663 | { |
| 1664 | int i = 0; |
| 1665 | |
| 1666 | printf("\nThe current state of the TPM is:\n"); |
| 1667 | |
| 1668 | if (state & TPM_STATE_ENABLED) |
| 1669 | printf(" Enabled"); |
| 1670 | else |
| 1671 | printf(" Disabled"); |
| 1672 | |
| 1673 | if (state & TPM_STATE_ACTIVE) |
| 1674 | printf(" and active\n"); |
| 1675 | else |
| 1676 | printf(" and deactivated\n"); |
| 1677 | |
| 1678 | if (state & TPM_STATE_OWNED) |
| 1679 | printf(" Ownership has been taken\n"); |
| 1680 | else { |
| 1681 | printf(" Ownership has not been taken\n"); |
| 1682 | if (state & TPM_STATE_OWNERINSTALL) |
| 1683 | printf(" A user can take ownership of the TPM\n"); |
| 1684 | else |
| 1685 | printf(" Taking ownership of the TPM has been disabled\n"); |
| 1686 | } |
| 1687 | |
| 1688 | if ((state & (TPM_STATE_ENABLED | TPM_STATE_ACTIVE)) != |
| 1689 | (TPM_STATE_ENABLED | TPM_STATE_ACTIVE)) { |
| 1690 | printf("\nNote: To make use of all functionality, the TPM must be " |
| 1691 | "enabled and active.\n"); |
| 1692 | } |
| 1693 | |
| 1694 | printf("\nAvailable options are:\n"); |
| 1695 | if (state & TPM_STATE_ENABLED) { |
| 1696 | printf(" d. Disable the TPM\n"); |
| 1697 | next_scancodes[i++] = 32; |
| 1698 | |
| 1699 | if (state & TPM_STATE_ACTIVE) { |
| 1700 | printf(" v. Deactivate the TPM\n"); |
| 1701 | next_scancodes[i++] = 47; |
| 1702 | |
| 1703 | if (state & TPM_STATE_OWNERINSTALL) { |
| 1704 | printf(" p. Prevent installation of an owner\n"); |
| 1705 | next_scancodes[i++] = 25; |
| 1706 | } else { |
| 1707 | printf(" s. Allow installation of an owner\n"); |
| 1708 | next_scancodes[i++] = 31; |
| 1709 | } |
| 1710 | } else { |
| 1711 | printf(" a. Activate the TPM\n"); |
| 1712 | next_scancodes[i++] = 30; |
| 1713 | } |
| 1714 | |
| 1715 | } else { |
| 1716 | printf(" e. Enable the TPM\n"); |
| 1717 | next_scancodes[i++] = 18; |
| 1718 | } |
| 1719 | |
| 1720 | if (state & TPM_STATE_OWNED) { |
| 1721 | printf(" c. Clear ownership\n"); |
| 1722 | next_scancodes[i++] = 46; |
| 1723 | } |
| 1724 | |
| 1725 | next_scancodes[i++] = 0; |
| 1726 | } |
| 1727 | |
| 1728 | void |
| 1729 | tpm_menu(void) |
| 1730 | { |
| 1731 | if (!CONFIG_TCGBIOS) |
| 1732 | return; |
| 1733 | |
| 1734 | int scancode, next_scancodes[7]; |
| 1735 | u32 rc, returnCode; |
| 1736 | tpm_ppi_code msgCode; |
| 1737 | int state = 0, i; |
| 1738 | int waitkey; |
| 1739 | |
| 1740 | while (get_keystroke(0) >= 0) |
| 1741 | ; |
| 1742 | wait_threads(); |
| 1743 | |
| 1744 | printf("The Trusted Platform Module (TPM) is a hardware device in " |
| 1745 | "this machine.\n" |
| 1746 | "It can help verify the integrity of system software.\n\n"); |
| 1747 | |
| 1748 | for (;;) { |
| 1749 | if ((state = get_tpm_state()) != ~0) { |
| 1750 | show_tpm_menu(state, next_scancodes); |
| 1751 | } else { |
| 1752 | printf("TPM is not working correctly.\n"); |
| 1753 | return; |
| 1754 | } |
| 1755 | |
| 1756 | printf("\nIf no change is desired or if this menu was reached by " |
| 1757 | "mistake, press ESC to\n" |
| 1758 | "reboot the machine.\n"); |
| 1759 | |
| 1760 | msgCode = TPM_PPI_OP_NOOP; |
| 1761 | |
| 1762 | waitkey = 1; |
| 1763 | |
| 1764 | while (waitkey) { |
| 1765 | while ((scancode = get_keystroke(1000)) == ~0) |
| 1766 | ; |
| 1767 | |
| 1768 | switch (scancode) { |
| 1769 | case 1: |
| 1770 | // ESC |
| 1771 | reset(); |
| 1772 | break; |
| 1773 | case 18: /* e. enable */ |
| 1774 | msgCode = TPM_PPI_OP_ENABLE; |
| 1775 | break; |
| 1776 | case 32: /* d. disable */ |
| 1777 | msgCode = TPM_PPI_OP_DISABLE; |
| 1778 | break; |
| 1779 | case 30: /* a. activate */ |
| 1780 | msgCode = TPM_PPI_OP_ACTIVATE; |
| 1781 | break; |
| 1782 | case 47: /* v. deactivate */ |
| 1783 | msgCode = TPM_PPI_OP_DEACTIVATE; |
| 1784 | break; |
| 1785 | case 46: /* c. clear owner */ |
| 1786 | msgCode = TPM_PPI_OP_CLEAR; |
| 1787 | break; |
| 1788 | case 25: /* p. prevent ownerinstall */ |
| 1789 | msgCode = TPM_PPI_OP_SET_OWNERINSTALL_FALSE; |
| 1790 | break; |
| 1791 | case 31: /* s. allow ownerinstall */ |
| 1792 | msgCode = TPM_PPI_OP_SET_OWNERINSTALL_TRUE; |
| 1793 | break; |
| 1794 | default: |
| 1795 | continue; |
| 1796 | } |
| 1797 | |
| 1798 | /* |
| 1799 | * Using the next_scancodes array, check whether the |
| 1800 | * pressed key is currently a valid option. |
| 1801 | */ |
| 1802 | for (i = 0; i < sizeof(next_scancodes); i++) { |
| 1803 | if (next_scancodes[i] == 0) |
| 1804 | break; |
| 1805 | |
| 1806 | if (next_scancodes[i] == scancode) { |
| 1807 | rc = tpm_process_cfg(msgCode, 1, &returnCode); |
| 1808 | |
| 1809 | if (rc) |
| 1810 | printf("An error occurred: 0x%x\n", rc); |
| 1811 | waitkey = 0; |
| 1812 | break; |
| 1813 | } |
| 1814 | } |
| 1815 | } |
| 1816 | } |
| 1817 | } |