Move tpm_buf code to common include/linux/tpm.h header so that it can be reused via other subsystems like trusted keys etc. Also rename trusted keys and asymmetric keys usage of TPM 1.x buffer implementation to tpm1_buf to avoid any compilation errors.
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| @@ -21,6 +21,7 @@ · 20 unmodified lines | ||
| 21 | 21 | #include <linux/acpi.h> |
| 22 | 22 | #include <linux/cdev.h> |
| 23 | 23 | #include <linux/fs.h> |
| 24 | +#include <linux/highmem.h> | |
| 24 | 25 | #include <crypto/hash_info.h> |
| 25 | 26 | |
| 26 | 27 | #define TPM_DIGEST_SIZE 20 /* Max TPM v1.2 PCR size */ |
| @@ -163,6 +164,217 @@ struct tpm_chip { · 136 unmodified lines | ||
| 163 | 164 | int locality; |
| 164 | 165 | }; |
| 165 | 166 | |
| 167 | +#define TPM_HEADER_SIZE 10 | |
| 168 | + | |
| 169 | +enum tpm2_const { | |
| 170 | + TPM2_PLATFORM_PCR = 24, | |
| 171 | + TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8), | |
| 172 | +}; | |
| 173 | + | |
| 174 | +enum tpm2_timeouts { | |
| 175 | + TPM2_TIMEOUT_A = 750, | |
| 176 | + TPM2_TIMEOUT_B = 2000, | |
| 177 | + TPM2_TIMEOUT_C = 200, | |
| 178 | + TPM2_TIMEOUT_D = 30, | |
| 179 | + TPM2_DURATION_SHORT = 20, | |
| 180 | + TPM2_DURATION_MEDIUM = 750, | |
| 181 | + TPM2_DURATION_LONG = 2000, | |
| 182 | + TPM2_DURATION_LONG_LONG = 300000, | |
| 183 | + TPM2_DURATION_DEFAULT = 120000, | |
| 184 | +}; | |
| 185 | + | |
| 186 | +enum tpm2_structures { | |
| 187 | + TPM2_ST_NO_SESSIONS = 0x8001, | |
| 188 | + TPM2_ST_SESSIONS = 0x8002, | |
| 189 | +}; | |
| 190 | + | |
| 191 | +/* Indicates from what layer of the software stack the error comes from */ | |
| 192 | +#define TSS2_RC_LAYER_SHIFT 16 | |
| 193 | +#define TSS2_RESMGR_TPM_RC_LAYER (11 << TSS2_RC_LAYER_SHIFT) | |
| 194 | + | |
| 195 | +enum tpm2_return_codes { | |
| 196 | + TPM2_RC_SUCCESS = 0x0000, | |
| 197 | + TPM2_RC_HASH = 0x0083, /* RC_FMT1 */ | |
| 198 | + TPM2_RC_HANDLE = 0x008B, | |
| 199 | + TPM2_RC_INITIALIZE = 0x0100, /* RC_VER1 */ | |
| 200 | + TPM2_RC_FAILURE = 0x0101, | |
| 201 | + TPM2_RC_DISABLED = 0x0120, | |
| 202 | + TPM2_RC_COMMAND_CODE = 0x0143, | |
| 203 | + TPM2_RC_TESTING = 0x090A, /* RC_WARN */ | |
| 204 | + TPM2_RC_REFERENCE_H0 = 0x0910, | |
| 205 | + TPM2_RC_RETRY = 0x0922, | |
| 206 | +}; | |
| 207 | + | |
| 208 | +enum tpm2_command_codes { | |
| 209 | + TPM2_CC_FIRST = 0x011F, | |
| 210 | + TPM2_CC_HIERARCHY_CONTROL = 0x0121, | |
| 211 | + TPM2_CC_HIERARCHY_CHANGE_AUTH = 0x0129, | |
| 212 | + TPM2_CC_CREATE_PRIMARY = 0x0131, | |
| 213 | + TPM2_CC_SEQUENCE_COMPLETE = 0x013E, | |
| 214 | + TPM2_CC_SELF_TEST = 0x0143, | |
| 215 | + TPM2_CC_STARTUP = 0x0144, | |
| 216 | + TPM2_CC_SHUTDOWN = 0x0145, | |
| 217 | + TPM2_CC_NV_READ = 0x014E, | |
| 218 | + TPM2_CC_CREATE = 0x0153, | |
| 219 | + TPM2_CC_LOAD = 0x0157, | |
| 220 | + TPM2_CC_SEQUENCE_UPDATE = 0x015C, | |
| 221 | + TPM2_CC_UNSEAL = 0x015E, | |
| 222 | + TPM2_CC_CONTEXT_LOAD = 0x0161, | |
| 223 | + TPM2_CC_CONTEXT_SAVE = 0x0162, | |
| 224 | + TPM2_CC_FLUSH_CONTEXT = 0x0165, | |
| 225 | + TPM2_CC_VERIFY_SIGNATURE = 0x0177, | |
| 226 | + TPM2_CC_GET_CAPABILITY = 0x017A, | |
| 227 | + TPM2_CC_GET_RANDOM = 0x017B, | |
| 228 | + TPM2_CC_PCR_READ = 0x017E, | |
| 229 | + TPM2_CC_PCR_EXTEND = 0x0182, | |
| 230 | + TPM2_CC_EVENT_SEQUENCE_COMPLETE = 0x0185, | |
| 231 | + TPM2_CC_HASH_SEQUENCE_START = 0x0186, | |
| 232 | + TPM2_CC_CREATE_LOADED = 0x0191, | |
| 233 | + TPM2_CC_LAST = 0x0193, /* Spec 1.36 */ | |
| 234 | +}; | |
| 235 | + | |
| 236 | +enum tpm2_permanent_handles { | |
| 237 | + TPM2_RS_PW = 0x40000009, | |
| 238 | +}; | |
| 239 | + | |
| 240 | +enum tpm2_capabilities { | |
| 241 | + TPM2_CAP_HANDLES = 1, | |
| 242 | + TPM2_CAP_COMMANDS = 2, | |
| 243 | + TPM2_CAP_PCRS = 5, | |
| 244 | + TPM2_CAP_TPM_PROPERTIES = 6, | |
| 245 | +}; | |
| 246 | + | |
| 247 | +enum tpm2_properties { | |
| 248 | + TPM_PT_TOTAL_COMMANDS = 0x0129, | |
| 249 | +}; | |
| 250 | + | |
| 251 | +enum tpm2_startup_types { | |
| 252 | + TPM2_SU_CLEAR = 0x0000, | |
| 253 | + TPM2_SU_STATE = 0x0001, | |
| 254 | +}; | |
| 255 | + | |
| 256 | +enum tpm2_cc_attrs { | |
| 257 | + TPM2_CC_ATTR_CHANDLES = 25, | |
| 258 | + TPM2_CC_ATTR_RHANDLE = 28, | |
| 259 | +}; | |
| 260 | + | |
| 261 | +#define TPM_VID_INTEL 0x8086 | |
| 262 | +#define TPM_VID_WINBOND 0x1050 | |
| 263 | +#define TPM_VID_STM 0x104A | |
| 264 | + | |
| 265 | +enum tpm_chip_flags { | |
| 266 | + TPM_CHIP_FLAG_TPM2 = BIT(1), | |
| 267 | + TPM_CHIP_FLAG_IRQ = BIT(2), | |
| 268 | + TPM_CHIP_FLAG_VIRTUAL = BIT(3), | |
| 269 | + TPM_CHIP_FLAG_HAVE_TIMEOUTS = BIT(4), | |
| 270 | + TPM_CHIP_FLAG_ALWAYS_POWERED = BIT(5), | |
| 271 | + TPM_CHIP_FLAG_FIRMWARE_POWER_MANAGED = BIT(6), | |
| 272 | +}; | |
| 273 | + | |
| 274 | +#define to_tpm_chip(d) container_of(d, struct tpm_chip, dev) | |
| 275 | + | |
| 276 | +struct tpm_header { | |
| 277 | + __be16 tag; | |
| 278 | + __be32 length; | |
| 279 | + union { | |
| 280 | + __be32 ordinal; | |
| 281 | + __be32 return_code; | |
| 282 | + }; | |
| 283 | +} __packed; | |
| 284 | + | |
| 285 | +/* A string buffer type for constructing TPM commands. This is based on the | |
| 286 | + * ideas of string buffer code in security/keys/trusted.h but is heap based | |
| 287 | + * in order to keep the stack usage minimal. | |
| 288 | + */ | |
| 289 | + | |
| 290 | +enum tpm_buf_flags { | |
| 291 | + TPM_BUF_OVERFLOW = BIT(0), | |
| 292 | +}; | |
| 293 | + | |
| 294 | +struct tpm_buf { | |
| 295 | + unsigned int flags; | |
| 296 | + u8 *data; | |
| 297 | +}; | |
| 298 | + | |
| 299 | +static inline void tpm_buf_reset(struct tpm_buf *buf, u16 tag, u32 ordinal) | |
| 300 | +{ | |
| 301 | + struct tpm_header *head = (struct tpm_header *)buf->data; | |
| 302 | + | |
| 303 | + head->tag = cpu_to_be16(tag); | |
| 304 | + head->length = cpu_to_be32(sizeof(*head)); | |
| 305 | + head->ordinal = cpu_to_be32(ordinal); | |
| 306 | +} | |
| 307 | + | |
| 308 | +static inline int tpm_buf_init(struct tpm_buf *buf, u16 tag, u32 ordinal) | |
| 309 | +{ | |
| 310 | + buf->data = (u8 *)__get_free_page(GFP_KERNEL); | |
| 311 | + if (!buf->data) | |
| 312 | + return -ENOMEM; | |
| 313 | + | |
| 314 | + buf->flags = 0; | |
| 315 | + tpm_buf_reset(buf, tag, ordinal); | |
| 316 | + return 0; | |
| 317 | +} | |
| 318 | + | |
| 319 | +static inline void tpm_buf_destroy(struct tpm_buf *buf) | |
| 320 | +{ | |
| 321 | + free_page((unsigned long)buf->data); | |
| 322 | +} | |
| 323 | + | |
| 324 | +static inline u32 tpm_buf_length(struct tpm_buf *buf) | |
| 325 | +{ | |
| 326 | + struct tpm_header *head = (struct tpm_header *)buf->data; | |
| 327 | + | |
| 328 | + return be32_to_cpu(head->length); | |
| 329 | +} | |
| 330 | + | |
| 331 | +static inline u16 tpm_buf_tag(struct tpm_buf *buf) | |
| 332 | +{ | |
| 333 | + struct tpm_header *head = (struct tpm_header *)buf->data; | |
| 334 | + | |
| 335 | + return be16_to_cpu(head->tag); | |
| 336 | +} | |
| 337 | + | |
| 338 | +static inline void tpm_buf_append(struct tpm_buf *buf, | |
| 339 | + const unsigned char *new_data, | |
| 340 | + unsigned int new_len) | |
| 341 | +{ | |
| 342 | + struct tpm_header *head = (struct tpm_header *)buf->data; | |
| 343 | + u32 len = tpm_buf_length(buf); | |
| 344 | + | |
| 345 | + /* Return silently if overflow has already happened. */ | |
| 346 | + if (buf->flags & TPM_BUF_OVERFLOW) | |
| 347 | + return; | |
| 348 | + | |
| 349 | + if ((len + new_len) > PAGE_SIZE) { | |
| 350 | + WARN(1, "tpm_buf: overflow\n"); | |
| 351 | + buf->flags |= TPM_BUF_OVERFLOW; | |
| 352 | + return; | |
| 353 | + } | |
| 354 | + | |
| 355 | + memcpy(&buf->data[len], new_data, new_len); | |
| 356 | + head->length = cpu_to_be32(len + new_len); | |
| 357 | +} | |
| 358 | + | |
| 359 | +static inline void tpm_buf_append_u8(struct tpm_buf *buf, const u8 value) | |
| 360 | +{ | |
| 361 | + tpm_buf_append(buf, &value, 1); | |
| 362 | +} | |
| 363 | + | |
| 364 | +static inline void tpm_buf_append_u16(struct tpm_buf *buf, const u16 value) | |
| 365 | +{ | |
| 366 | + __be16 value2 = cpu_to_be16(value); | |
| 367 | + | |
| 368 | + tpm_buf_append(buf, (u8 *) &value2, 2); | |
| 369 | +} | |
| 370 | + | |
| 371 | +static inline void tpm_buf_append_u32(struct tpm_buf *buf, const u32 value) | |
| 372 | +{ | |
| 373 | + __be32 value2 = cpu_to_be32(value); | |
| 374 | + | |
| 375 | + tpm_buf_append(buf, (u8 *) &value2, 4); | |
| 376 | +} | |
| 377 | + | |
| 166 | 378 | #if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE) |
| 167 | 379 | |
| 168 | 380 | extern int tpm_is_tpm2(struct tpm_chip *chip); |