include/tpm-v2.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * Copyright (c) 2018 Bootlin
   4  * Author: Miquel Raynal <miquel.raynal@bootlin.com>
   5  */
   6
   7 #ifndef __TPM_V2_H
   8 #define __TPM_V2_H
   9
  10 #include <tpm-common.h>
  11
  12 #define TPM2_DIGEST_LEN         32
  13
  14 /**
  15  * TPM2 Structure Tags for command/response buffers.
  16  *
  17  * @TPM2_ST_NO_SESSIONS: the command does not need an authentication.
  18  * @TPM2_ST_SESSIONS: the command needs an authentication.
  19  */
  20 enum tpm2_structures {
  21         TPM2_ST_NO_SESSIONS     = 0x8001,
  22         TPM2_ST_SESSIONS        = 0x8002,
  23 };
  24
  25 /**
  26  * TPM2 type of boolean.
  27  */
  28 enum tpm2_yes_no {
  29         TPMI_YES                = 1,
  30         TPMI_NO                 = 0,
  31 };
  32
  33 /**
  34  * TPM2 startup values.
  35  *
  36  * @TPM2_SU_CLEAR: reset the internal state.
  37  * @TPM2_SU_STATE: restore saved state (if any).
  38  */
  39 enum tpm2_startup_types {
  40         TPM2_SU_CLEAR           = 0x0000,
  41         TPM2_SU_STATE           = 0x0001,
  42 };
  43
  44 /**
  45  * TPM2 permanent handles.
  46  *
  47  * @TPM2_RH_OWNER: refers to the 'owner' hierarchy.
  48  * @TPM2_RS_PW: indicates a password.
  49  * @TPM2_RH_LOCKOUT: refers to the 'lockout' hierarchy.
  50  * @TPM2_RH_ENDORSEMENT: refers to the 'endorsement' hierarchy.
  51  * @TPM2_RH_PLATFORM: refers to the 'platform' hierarchy.
  52  */
  53 enum tpm2_handles {
  54         TPM2_RH_OWNER           = 0x40000001,
  55         TPM2_RS_PW              = 0x40000009,
  56         TPM2_RH_LOCKOUT         = 0x4000000A,
  57         TPM2_RH_ENDORSEMENT     = 0x4000000B,
  58         TPM2_RH_PLATFORM        = 0x4000000C,
  59 };
  60
  61 /**
  62  * TPM2 command codes used at the beginning of a buffer, gives the command.
  63  *
  64  * @TPM2_CC_STARTUP: TPM2_Startup().
  65  * @TPM2_CC_SELF_TEST: TPM2_SelfTest().
  66  * @TPM2_CC_CLEAR: TPM2_Clear().
  67  * @TPM2_CC_CLEARCONTROL: TPM2_ClearControl().
  68  * @TPM2_CC_HIERCHANGEAUTH: TPM2_HierarchyChangeAuth().
  69  * @TPM2_CC_PCR_SETAUTHPOL: TPM2_PCR_SetAuthPolicy().
  70  * @TPM2_CC_DAM_RESET: TPM2_DictionaryAttackLockReset().
  71  * @TPM2_CC_DAM_PARAMETERS: TPM2_DictionaryAttackParameters().
  72  * @TPM2_CC_GET_CAPABILITY: TPM2_GetCapibility().
  73  * @TPM2_CC_PCR_READ: TPM2_PCR_Read().
  74  * @TPM2_CC_PCR_EXTEND: TPM2_PCR_Extend().
  75  * @TPM2_CC_PCR_SETAUTHVAL: TPM2_PCR_SetAuthValue().
  76  */
  77 enum tpm2_command_codes {
  78         TPM2_CC_STARTUP         = 0x0144,
  79         TPM2_CC_SELF_TEST       = 0x0143,
  80         TPM2_CC_CLEAR           = 0x0126,
  81         TPM2_CC_CLEARCONTROL    = 0x0127,
  82         TPM2_CC_HIERCHANGEAUTH  = 0x0129,
  83         TPM2_CC_PCR_SETAUTHPOL  = 0x012C,
  84         TPM2_CC_DAM_RESET       = 0x0139,
  85         TPM2_CC_DAM_PARAMETERS  = 0x013A,
  86         TPM2_CC_NV_READ         = 0x014E,
  87         TPM2_CC_GET_CAPABILITY  = 0x017A,
  88         TPM2_CC_PCR_READ        = 0x017E,
  89         TPM2_CC_PCR_EXTEND      = 0x0182,
  90         TPM2_CC_PCR_SETAUTHVAL  = 0x0183,
  91 };
  92
  93 /**
  94  * TPM2 return codes.
  95  */
  96 enum tpm2_return_codes {
  97         TPM2_RC_SUCCESS         = 0x0000,
  98         TPM2_RC_BAD_TAG         = 0x001E,
  99         TPM2_RC_FMT1            = 0x0080,
 100         TPM2_RC_HASH            = TPM2_RC_FMT1 + 0x0003,
 101         TPM2_RC_VALUE           = TPM2_RC_FMT1 + 0x0004,
 102         TPM2_RC_SIZE            = TPM2_RC_FMT1 + 0x0015,
 103         TPM2_RC_BAD_AUTH        = TPM2_RC_FMT1 + 0x0022,
 104         TPM2_RC_HANDLE          = TPM2_RC_FMT1 + 0x000B,
 105         TPM2_RC_VER1            = 0x0100,
 106         TPM2_RC_INITIALIZE      = TPM2_RC_VER1 + 0x0000,
 107         TPM2_RC_FAILURE         = TPM2_RC_VER1 + 0x0001,
 108         TPM2_RC_DISABLED        = TPM2_RC_VER1 + 0x0020,
 109         TPM2_RC_AUTH_MISSING    = TPM2_RC_VER1 + 0x0025,
 110         TPM2_RC_COMMAND_CODE    = TPM2_RC_VER1 + 0x0043,
 111         TPM2_RC_AUTHSIZE        = TPM2_RC_VER1 + 0x0044,
 112         TPM2_RC_AUTH_CONTEXT    = TPM2_RC_VER1 + 0x0045,
 113         TPM2_RC_NEEDS_TEST      = TPM2_RC_VER1 + 0x0053,
 114         TPM2_RC_WARN            = 0x0900,
 115         TPM2_RC_TESTING         = TPM2_RC_WARN + 0x000A,
 116         TPM2_RC_REFERENCE_H0    = TPM2_RC_WARN + 0x0010,
 117         TPM2_RC_LOCKOUT         = TPM2_RC_WARN + 0x0021,
 118 };
 119
 120 /**
 121  * TPM2 algorithms.
 122  */
 123 enum tpm2_algorithms {
 124         TPM2_ALG_XOR            = 0x0A,
 125         TPM2_ALG_SHA256         = 0x0B,
 126         TPM2_ALG_SHA384         = 0x0C,
 127         TPM2_ALG_SHA512         = 0x0D,
 128         TPM2_ALG_NULL           = 0x10,
 129 };
 130
 131 /* NV index attributes */
 132 enum tpm_index_attrs {
 133         TPMA_NV_PPWRITE         = 1UL << 0,
 134         TPMA_NV_OWNERWRITE      = 1UL << 1,
 135         TPMA_NV_AUTHWRITE       = 1UL << 2,
 136         TPMA_NV_POLICYWRITE     = 1UL << 3,
 137         TPMA_NV_COUNTER         = 1UL << 4,
 138         TPMA_NV_BITS            = 1UL << 5,
 139         TPMA_NV_EXTEND          = 1UL << 6,
 140         TPMA_NV_POLICY_DELETE   = 1UL << 10,
 141         TPMA_NV_WRITELOCKED     = 1UL << 11,
 142         TPMA_NV_WRITEALL        = 1UL << 12,
 143         TPMA_NV_WRITEDEFINE     = 1UL << 13,
 144         TPMA_NV_WRITE_STCLEAR   = 1UL << 14,
 145         TPMA_NV_GLOBALLOCK      = 1UL << 15,
 146         TPMA_NV_PPREAD          = 1UL << 16,
 147         TPMA_NV_OWNERREAD       = 1UL << 17,
 148         TPMA_NV_AUTHREAD        = 1UL << 18,
 149         TPMA_NV_POLICYREAD      = 1UL << 19,
 150         TPMA_NV_NO_DA           = 1UL << 25,
 151         TPMA_NV_ORDERLY         = 1UL << 26,
 152         TPMA_NV_CLEAR_STCLEAR   = 1UL << 27,
 153         TPMA_NV_READLOCKED      = 1UL << 28,
 154         TPMA_NV_WRITTEN         = 1UL << 29,
 155         TPMA_NV_PLATFORMCREATE  = 1UL << 30,
 156         TPMA_NV_READ_STCLEAR    = 1UL << 31,
 157
 158         TPMA_NV_MASK_READ       = TPMA_NV_PPREAD | TPMA_NV_OWNERREAD |
 159                                 TPMA_NV_AUTHREAD | TPMA_NV_POLICYREAD,
 160         TPMA_NV_MASK_WRITE      = TPMA_NV_PPWRITE | TPMA_NV_OWNERWRITE |
 161                                         TPMA_NV_AUTHWRITE | TPMA_NV_POLICYWRITE,
 162 };
 163
 164 /**
 165  * Issue a TPM2_Startup command.
 166  *
 167  * @dev         TPM device
 168  * @mode        TPM startup mode
 169  *
 170  * @return code of the operation
 171  */
 172 u32 tpm2_startup(struct udevice *dev, enum tpm2_startup_types mode);
 173
 174 /**
 175  * Issue a TPM2_SelfTest command.
 176  *
 177  * @dev         TPM device
 178  * @full_test   Asking to perform all tests or only the untested ones
 179  *
 180  * @return code of the operation
 181  */
 182 u32 tpm2_self_test(struct udevice *dev, enum tpm2_yes_no full_test);
 183
 184 /**
 185  * Issue a TPM2_Clear command.
 186  *
 187  * @dev         TPM device
 188  * @handle      Handle
 189  * @pw          Password
 190  * @pw_sz       Length of the password
 191  *
 192  * @return code of the operation
 193  */
 194 u32 tpm2_clear(struct udevice *dev, u32 handle, const char *pw,
 195                const ssize_t pw_sz);
 196
 197 /**
 198  * Issue a TPM2_PCR_Extend command.
 199  *
 200  * @dev         TPM device
 201  * @index       Index of the PCR
 202  * @digest      Value representing the event to be recorded
 203  *
 204  * @return code of the operation
 205  */
 206 u32 tpm2_pcr_extend(struct udevice *dev, u32 index, const uint8_t *digest);
 207
 208 /**
 209  * Issue a TPM2_PCR_Read command.
 210  *
 211  * @dev         TPM device
 212  * @idx         Index of the PCR
 213  * @idx_min_sz  Minimum size in bytes of the pcrSelect array
 214  * @data        Output buffer for contents of the named PCR
 215  * @updates     Optional out parameter: number of updates for this PCR
 216  *
 217  * @return code of the operation
 218  */
 219 u32 tpm2_pcr_read(struct udevice *dev, u32 idx, unsigned int idx_min_sz,
 220                   void *data, unsigned int *updates);
 221
 222 /**
 223  * Issue a TPM2_GetCapability command.  This implementation is limited
 224  * to query property index that is 4-byte wide.
 225  *
 226  * @dev         TPM device
 227  * @capability  Partition of capabilities
 228  * @property    Further definition of capability, limited to be 4 bytes wide
 229  * @buf         Output buffer for capability information
 230  * @prop_count  Size of output buffer
 231  *
 232  * @return code of the operation
 233  */
 234 u32 tpm2_get_capability(struct udevice *dev, u32 capability, u32 property,
 235                         void *buf, size_t prop_count);
 236
 237 /**
 238  * Issue a TPM2_DictionaryAttackLockReset command.
 239  *
 240  * @dev         TPM device
 241  * @pw          Password
 242  * @pw_sz       Length of the password
 243  *
 244  * @return code of the operation
 245  */
 246 u32 tpm2_dam_reset(struct udevice *dev, const char *pw, const ssize_t pw_sz);
 247
 248 /**
 249  * Issue a TPM2_DictionaryAttackParameters command.
 250  *
 251  * @dev         TPM device
 252  * @pw          Password
 253  * @pw_sz       Length of the password
 254  * @max_tries   Count of authorizations before lockout
 255  * @recovery_time Time before decrementation of the failure count
 256  * @lockout_recovery Time to wait after a lockout
 257  *
 258  * @return code of the operation
 259  */
 260 u32 tpm2_dam_parameters(struct udevice *dev, const char *pw,
 261                         const ssize_t pw_sz, unsigned int max_tries,
 262                         unsigned int recovery_time,
 263                         unsigned int lockout_recovery);
 264
 265 /**
 266  * Issue a TPM2_HierarchyChangeAuth command.
 267  *
 268  * @dev         TPM device
 269  * @handle      Handle
 270  * @newpw       New password
 271  * @newpw_sz    Length of the new password
 272  * @oldpw       Old password
 273  * @oldpw_sz    Length of the old password
 274  *
 275  * @return code of the operation
 276  */
 277 int tpm2_change_auth(struct udevice *dev, u32 handle, const char *newpw,
 278                      const ssize_t newpw_sz, const char *oldpw,
 279                      const ssize_t oldpw_sz);
 280
 281 /**
 282  * Issue a TPM_PCR_SetAuthPolicy command.
 283  *
 284  * @dev         TPM device
 285  * @pw          Platform password
 286  * @pw_sz       Length of the password
 287  * @index       Index of the PCR
 288  * @digest      New key to access the PCR
 289  *
 290  * @return code of the operation
 291  */
 292 u32 tpm2_pcr_setauthpolicy(struct udevice *dev, const char *pw,
 293                            const ssize_t pw_sz, u32 index, const char *key);
 294
 295 /**
 296  * Issue a TPM_PCR_SetAuthValue command.
 297  *
 298  * @dev         TPM device
 299  * @pw          Platform password
 300  * @pw_sz       Length of the password
 301  * @index       Index of the PCR
 302  * @digest      New key to access the PCR
 303  * @key_sz      Length of the new key
 304  *
 305  * @return code of the operation
 306  */
 307 u32 tpm2_pcr_setauthvalue(struct udevice *dev, const char *pw,
 308                           const ssize_t pw_sz, u32 index, const char *key,
 309                           const ssize_t key_sz);
 310
 311 #endif /* __TPM_V2_H */