Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 The Chromium OS Authors. All rights reserved. |
Frans Hendriks | 589eff7 | 2019-06-26 10:43:40 +0200 | [diff] [blame] | 3 | * Copyright (c) 2018 Eltan B.V. |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
Victor Prupis | f706020 | 2016-08-19 10:45:04 -0700 | [diff] [blame] | 8 | #include <arch/early_variables.h> |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 9 | #include <commonlib/iobuf.h> |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 10 | #include <console/console.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <string.h> |
| 13 | |
Philipp Deppenwiese | d88fb36 | 2017-10-18 20:26:18 +0200 | [diff] [blame] | 14 | #include "tss_marshaling.h" |
Philipp Deppenwiese | c07f8fb | 2018-02-27 19:40:52 +0100 | [diff] [blame] | 15 | #include <security/tpm/tss/vendor/cr50/cr50.h> |
Frans Hendriks | 589eff7 | 2019-06-26 10:43:40 +0200 | [diff] [blame] | 16 | #include <security/tpm/tss.h> |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 17 | |
Victor Prupis | f706020 | 2016-08-19 10:45:04 -0700 | [diff] [blame] | 18 | static uint16_t tpm_tag CAR_GLOBAL; /* Depends on the command type. */ |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 19 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 20 | #define unmarshal_TPM_CAP(a, b) ibuf_read_be32(a, b) |
| 21 | #define unmarshal_TPM_CC(a, b) ibuf_read_be32(a, b) |
| 22 | #define unmarshal_TPM_PT(a, b) ibuf_read_be32(a, b) |
| 23 | #define unmarshal_TPM_HANDLE(a, b) ibuf_read_be32(a, b) |
| 24 | |
| 25 | #define marshal_TPM_HANDLE(a, b) obuf_write_be32(a, b) |
| 26 | #define marshal_TPMI_ALG_HASH(a, b) obuf_write_be16(a, b) |
| 27 | |
| 28 | static int marshal_startup(struct obuf *ob, struct tpm2_startup *cmd_body) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 29 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 30 | return obuf_write_be16(ob, cmd_body->startup_type); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 31 | } |
| 32 | |
Joel Kitching | 2e690ee | 2018-11-15 16:48:53 +0800 | [diff] [blame] | 33 | static int marshal_shutdown(struct obuf *ob, struct tpm2_shutdown *cmd_body) |
| 34 | { |
| 35 | return obuf_write_be16(ob, cmd_body->shutdown_type); |
| 36 | } |
| 37 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 38 | static int marshal_get_capability(struct obuf *ob, |
| 39 | struct tpm2_get_capability *cmd_body) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 40 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 41 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 42 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 43 | rc |= obuf_write_be32(ob, cmd_body->capability); |
| 44 | rc |= obuf_write_be32(ob, cmd_body->property); |
| 45 | rc |= obuf_write_be32(ob, cmd_body->propertyCount); |
Vadim Bendebury | bc92710 | 2016-07-07 10:52:46 -0700 | [diff] [blame] | 46 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 47 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 48 | } |
| 49 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 50 | static int marshal_TPM2B(struct obuf *ob, TPM2B *data) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 51 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 52 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 53 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 54 | rc |= obuf_write_be16(ob, data->size); |
| 55 | rc |= obuf_write(ob, data->buffer, data->size); |
Vadim Bendebury | bc92710 | 2016-07-07 10:52:46 -0700 | [diff] [blame] | 56 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 57 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 58 | } |
| 59 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 60 | static int marshal_TPMA_NV(struct obuf *ob, TPMA_NV *nv) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 61 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 62 | uint32_t v; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 63 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 64 | memcpy(&v, nv, sizeof(v)); |
| 65 | return obuf_write_be32(ob, v); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 66 | } |
| 67 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 68 | static int marshal_TPMS_NV_PUBLIC(struct obuf *ob, TPMS_NV_PUBLIC *nvpub) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 69 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 70 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 71 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 72 | rc |= marshal_TPM_HANDLE(ob, nvpub->nvIndex); |
| 73 | rc |= marshal_TPMI_ALG_HASH(ob, nvpub->nameAlg); |
| 74 | rc |= marshal_TPMA_NV(ob, &nvpub->attributes); |
| 75 | rc |= marshal_TPM2B(ob, &nvpub->authPolicy.b); |
| 76 | rc |= obuf_write_be16(ob, nvpub->dataSize); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 77 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 78 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 79 | } |
| 80 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 81 | static int marshal_TPMT_HA(struct obuf *ob, TPMT_HA *tpmtha) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 82 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 83 | int rc = 0; |
| 84 | |
| 85 | rc |= marshal_TPMI_ALG_HASH(ob, tpmtha->hashAlg); |
Frans Hendriks | aa771cb | 2019-09-04 11:10:27 +0200 | [diff] [blame^] | 86 | switch (tpmtha->hashAlg) { |
| 87 | case TPM_ALG_SHA1: |
| 88 | rc |= obuf_write(ob, tpmtha->digest.sha1, |
Frans Hendriks | 7e220ca | 2019-06-28 10:18:22 +0200 | [diff] [blame] | 89 | tlcl_get_hash_size_from_algo(tpmtha->hashAlg)); |
Frans Hendriks | aa771cb | 2019-09-04 11:10:27 +0200 | [diff] [blame^] | 90 | break; |
| 91 | case TPM_ALG_SHA256: |
| 92 | rc |= obuf_write(ob, tpmtha->digest.sha256, |
| 93 | tlcl_get_hash_size_from_algo(tpmtha->hashAlg)); |
| 94 | break; |
| 95 | case TPM_ALG_SM3_256: |
| 96 | rc |= obuf_write(ob, tpmtha->digest.sm3_256, |
| 97 | tlcl_get_hash_size_from_algo(tpmtha->hashAlg)); |
| 98 | break; |
| 99 | case TPM_ALG_SHA384: |
| 100 | rc |= obuf_write(ob, tpmtha->digest.sha384, |
| 101 | tlcl_get_hash_size_from_algo(tpmtha->hashAlg)); |
| 102 | break; |
| 103 | case TPM_ALG_SHA512: |
| 104 | rc |= obuf_write(ob, tpmtha->digest.sha512, |
| 105 | tlcl_get_hash_size_from_algo(tpmtha->hashAlg)); |
| 106 | break; |
| 107 | default: |
| 108 | rc = -1; |
| 109 | } |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 110 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 111 | } |
| 112 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 113 | static int marshal_TPML_DIGEST_VALUES(struct obuf *ob, |
| 114 | TPML_DIGEST_VALUES *dvalues) |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 115 | { |
| 116 | int i; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 117 | int rc = 0; |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 118 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 119 | rc |= obuf_write_be32(ob, dvalues->count); |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 120 | for (i = 0; i < dvalues->count; i++) |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 121 | rc |= marshal_TPMT_HA(ob, &dvalues->digests[i]); |
| 122 | |
| 123 | return rc; |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 124 | } |
| 125 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 126 | static int marshal_session_header(struct obuf *ob, |
| 127 | struct tpm2_session_header *session_header) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 128 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 129 | int rc = 0; |
| 130 | struct obuf ob_sz; |
| 131 | size_t prev_written; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 132 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 133 | /* Snapshot current location to place size of header. */ |
| 134 | if (obuf_splice_current(ob, &ob_sz, sizeof(uint32_t)) < 0) |
| 135 | return -1; |
Vadim Bendebury | bc92710 | 2016-07-07 10:52:46 -0700 | [diff] [blame] | 136 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 137 | /* Write a size placeholder. */ |
| 138 | rc |= obuf_write_be32(ob, 0); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 139 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 140 | /* Keep track of session header data size by tracking num written. */ |
| 141 | prev_written = obuf_nr_written(ob); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 142 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 143 | rc |= obuf_write_be32(ob, session_header->session_handle); |
| 144 | rc |= obuf_write_be16(ob, session_header->nonce_size); |
| 145 | rc |= obuf_write(ob, session_header->nonce, session_header->nonce_size); |
| 146 | rc |= obuf_write_be8(ob, session_header->session_attrs); |
| 147 | rc |= obuf_write_be16(ob, session_header->auth_size); |
| 148 | rc |= obuf_write(ob, session_header->auth, session_header->auth_size); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 149 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 150 | /* Fill back in proper size of session header. */ |
| 151 | rc |= obuf_write_be32(&ob_sz, obuf_nr_written(ob) - prev_written); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 152 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 153 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 154 | } |
| 155 | |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 156 | /* |
| 157 | * Common session header can include one or two handles and an empty |
| 158 | * session_header structure. |
| 159 | */ |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 160 | static int marshal_common_session_header(struct obuf *ob, |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 161 | const uint32_t *handles, |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 162 | size_t handle_count) |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 163 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 164 | size_t i; |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 165 | struct tpm2_session_header session_header; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 166 | int rc = 0; |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 167 | |
Victor Prupis | f706020 | 2016-08-19 10:45:04 -0700 | [diff] [blame] | 168 | car_set_var(tpm_tag, TPM_ST_SESSIONS); |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 169 | |
| 170 | for (i = 0; i < handle_count; i++) |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 171 | rc |= marshal_TPM_HANDLE(ob, handles[i]); |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 172 | |
| 173 | memset(&session_header, 0, sizeof(session_header)); |
| 174 | session_header.session_handle = TPM_RS_PW; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 175 | rc |= marshal_session_header(ob, &session_header); |
| 176 | |
| 177 | return rc; |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 178 | } |
| 179 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 180 | static int marshal_nv_define_space(struct obuf *ob, |
| 181 | struct tpm2_nv_define_space_cmd *nvd_in) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 182 | { |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 183 | const uint32_t handle[] = { TPM_RH_PLATFORM }; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 184 | struct obuf ob_sz; |
| 185 | size_t prev_written; |
| 186 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 187 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 188 | rc |= marshal_common_session_header(ob, handle, ARRAY_SIZE(handle)); |
| 189 | rc |= marshal_TPM2B(ob, &nvd_in->auth.b); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 190 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 191 | /* Snapshot current location to place size field. */ |
| 192 | if (obuf_splice_current(ob, &ob_sz, sizeof(uint16_t)) < 0) |
| 193 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 194 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 195 | /* Put placeholder for size */ |
| 196 | rc |= obuf_write_be16(ob, 0); |
Vadim Bendebury | bc92710 | 2016-07-07 10:52:46 -0700 | [diff] [blame] | 197 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 198 | /* Keep track of nv define space data size by tracking num written. */ |
| 199 | prev_written = obuf_nr_written(ob); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 200 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 201 | rc |= marshal_TPMS_NV_PUBLIC(ob, &nvd_in->publicInfo); |
| 202 | rc |= obuf_write_be16(&ob_sz, obuf_nr_written(ob) - prev_written); |
Vadim Bendebury | bc92710 | 2016-07-07 10:52:46 -0700 | [diff] [blame] | 203 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 204 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 205 | } |
| 206 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 207 | static int marshal_nv_write(struct obuf *ob, |
| 208 | struct tpm2_nv_write_cmd *command_body) |
| 209 | { |
| 210 | int rc = 0; |
| 211 | uint32_t handles[] = { TPM_RH_PLATFORM, command_body->nvIndex }; |
| 212 | |
| 213 | rc |= marshal_common_session_header(ob, handles, ARRAY_SIZE(handles)); |
| 214 | rc |= marshal_TPM2B(ob, &command_body->data.b); |
| 215 | rc |= obuf_write_be16(ob, command_body->offset); |
| 216 | |
| 217 | return rc; |
| 218 | } |
| 219 | |
| 220 | static int marshal_nv_write_lock(struct obuf *ob, |
| 221 | struct tpm2_nv_write_lock_cmd *command_body) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 222 | { |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 223 | uint32_t handles[] = { TPM_RH_PLATFORM, command_body->nvIndex }; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 224 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 225 | return marshal_common_session_header(ob, handles, ARRAY_SIZE(handles)); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 226 | } |
| 227 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 228 | static int marshal_pcr_extend(struct obuf *ob, |
| 229 | struct tpm2_pcr_extend_cmd *command_body) |
Vadim Bendebury | 4c0851c | 2016-07-03 17:08:10 -0700 | [diff] [blame] | 230 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 231 | int rc = 0; |
| 232 | uint32_t handles[] = { command_body->pcrHandle }; |
| 233 | |
| 234 | rc |= marshal_common_session_header(ob, handles, ARRAY_SIZE(handles)); |
| 235 | rc |= marshal_TPML_DIGEST_VALUES(ob, &command_body->digests); |
| 236 | |
| 237 | return rc; |
Vadim Bendebury | 4c0851c | 2016-07-03 17:08:10 -0700 | [diff] [blame] | 238 | } |
| 239 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 240 | static int marshal_nv_read(struct obuf *ob, |
| 241 | struct tpm2_nv_read_cmd *command_body) |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 242 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 243 | int rc = 0; |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 244 | uint32_t handles[] = { TPM_RH_PLATFORM, command_body->nvIndex }; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 245 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 246 | rc |= marshal_common_session_header(ob, handles, ARRAY_SIZE(handles)); |
| 247 | rc |= obuf_write_be16(ob, command_body->size); |
| 248 | rc |= obuf_write_be16(ob, command_body->offset); |
| 249 | |
| 250 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 251 | } |
| 252 | |
Elyes HAOUAS | 3d45000 | 2018-08-09 18:55:58 +0200 | [diff] [blame] | 253 | /* TPM2_Clear command does not require parameters. */ |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 254 | static int marshal_clear(struct obuf *ob) |
Vadim Bendebury | 6acb9a6 | 2016-06-30 20:50:49 -0700 | [diff] [blame] | 255 | { |
| 256 | const uint32_t handle[] = { TPM_RH_PLATFORM }; |
| 257 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 258 | return marshal_common_session_header(ob, handle, ARRAY_SIZE(handle)); |
Vadim Bendebury | 6acb9a6 | 2016-06-30 20:50:49 -0700 | [diff] [blame] | 259 | } |
| 260 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 261 | static int marshal_selftest(struct obuf *ob, |
| 262 | struct tpm2_self_test *command_body) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 263 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 264 | return obuf_write_be8(ob, command_body->yes_no); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 265 | } |
| 266 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 267 | static int marshal_hierarchy_control(struct obuf *ob, |
| 268 | struct tpm2_hierarchy_control_cmd *command_body) |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 269 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 270 | int rc = 0; |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 271 | struct tpm2_session_header session_header; |
| 272 | |
| 273 | car_set_var(tpm_tag, TPM_ST_SESSIONS); |
| 274 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 275 | rc |= marshal_TPM_HANDLE(ob, TPM_RH_PLATFORM); |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 276 | memset(&session_header, 0, sizeof(session_header)); |
| 277 | session_header.session_handle = TPM_RS_PW; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 278 | rc |= marshal_session_header(ob, &session_header); |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 279 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 280 | rc |= marshal_TPM_HANDLE(ob, command_body->enable); |
| 281 | rc |= obuf_write_be8(ob, command_body->state); |
| 282 | |
| 283 | return rc; |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 284 | } |
| 285 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 286 | static int marshal_cr50_vendor_command(struct obuf *ob, void *command_body) |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 287 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 288 | int rc = 0; |
| 289 | uint16_t *sub_command = command_body; |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 290 | |
| 291 | switch (*sub_command) { |
Keith Short | e0f3400 | 2019-02-05 16:15:10 -0700 | [diff] [blame] | 292 | case TPM2_CR50_SUB_CMD_IMMEDIATE_RESET: |
| 293 | /* The 16-bit timeout parameter is optional for the |
| 294 | * IMMEDIATE_RESET command. However in coreboot, the timeout |
| 295 | * parameter must be specified. |
| 296 | */ |
| 297 | rc |= obuf_write_be16(ob, sub_command[0]); |
| 298 | rc |= obuf_write_be16(ob, sub_command[1]); |
| 299 | break; |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 300 | case TPM2_CR50_SUB_CMD_NVMEM_ENABLE_COMMITS: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 301 | rc |= obuf_write_be16(ob, *sub_command); |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 302 | break; |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 303 | case TPM2_CR50_SUB_CMD_TURN_UPDATE_ON: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 304 | rc |= obuf_write_be16(ob, sub_command[0]); |
| 305 | rc |= obuf_write_be16(ob, sub_command[1]); |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 306 | break; |
Keith Short | e371d42 | 2019-01-11 07:52:32 -0700 | [diff] [blame] | 307 | case TPM2_CR50_SUB_CMD_GET_REC_BTN: |
| 308 | rc |= obuf_write_be16(ob, *sub_command); |
| 309 | break; |
Keith Short | e0f3400 | 2019-02-05 16:15:10 -0700 | [diff] [blame] | 310 | case TPM2_CR50_SUB_CMD_TPM_MODE: |
| 311 | /* The Cr50 TPM_MODE command supports an optional parameter. |
| 312 | * When the parameter is present the Cr50 will attempt to change |
| 313 | * the TPM state (enable or disable) and returns the new state |
| 314 | * in the response. When the parameter is absent, the Cr50 |
| 315 | * returns the current TPM state. |
| 316 | * |
| 317 | * coreboot currently only uses the TPM get capability and does |
| 318 | * not set a new TPM state with the Cr50. |
| 319 | */ |
| 320 | rc |= obuf_write_be16(ob, *sub_command); |
| 321 | break; |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 322 | default: |
| 323 | /* Unsupported subcommand. */ |
| 324 | printk(BIOS_WARNING, "Unsupported cr50 subcommand: 0x%04x\n", |
| 325 | *sub_command); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 326 | rc = -1; |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 327 | break; |
| 328 | } |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 329 | return rc; |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 330 | } |
| 331 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 332 | int tpm_marshal_command(TPM_CC command, void *tpm_command_body, struct obuf *ob) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 333 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 334 | struct obuf ob_hdr; |
| 335 | const size_t hdr_sz = sizeof(uint16_t) + 2 * sizeof(uint32_t); |
| 336 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 337 | |
Victor Prupis | f706020 | 2016-08-19 10:45:04 -0700 | [diff] [blame] | 338 | car_set_var(tpm_tag, TPM_ST_NO_SESSIONS); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 339 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 340 | if (obuf_splice_current(ob, &ob_hdr, hdr_sz) < 0) |
| 341 | return -1; |
| 342 | |
| 343 | /* Write TPM command header with placeholder field values. */ |
| 344 | rc |= obuf_write_be16(ob, 0); |
| 345 | rc |= obuf_write_be32(ob, 0); |
| 346 | rc |= obuf_write_be32(ob, command); |
| 347 | |
| 348 | if (rc != 0) |
| 349 | return rc; |
| 350 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 351 | switch (command) { |
| 352 | case TPM2_Startup: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 353 | rc |= marshal_startup(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 354 | break; |
| 355 | |
Joel Kitching | 2e690ee | 2018-11-15 16:48:53 +0800 | [diff] [blame] | 356 | case TPM2_Shutdown: |
| 357 | rc |= marshal_shutdown(ob, tpm_command_body); |
| 358 | break; |
| 359 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 360 | case TPM2_GetCapability: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 361 | rc |= marshal_get_capability(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 362 | break; |
| 363 | |
| 364 | case TPM2_NV_Read: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 365 | rc |= marshal_nv_read(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 366 | break; |
| 367 | |
| 368 | case TPM2_NV_DefineSpace: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 369 | rc |= marshal_nv_define_space(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 370 | break; |
| 371 | |
| 372 | case TPM2_NV_Write: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 373 | rc |= marshal_nv_write(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 374 | break; |
| 375 | |
Vadim Bendebury | 4c0851c | 2016-07-03 17:08:10 -0700 | [diff] [blame] | 376 | case TPM2_NV_WriteLock: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 377 | rc |= marshal_nv_write_lock(ob, tpm_command_body); |
Vadim Bendebury | 4c0851c | 2016-07-03 17:08:10 -0700 | [diff] [blame] | 378 | break; |
| 379 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 380 | case TPM2_SelfTest: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 381 | rc |= marshal_selftest(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 382 | break; |
| 383 | |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 384 | case TPM2_Hierarchy_Control: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 385 | rc |= marshal_hierarchy_control(ob, tpm_command_body); |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 386 | break; |
| 387 | |
Vadim Bendebury | 6acb9a6 | 2016-06-30 20:50:49 -0700 | [diff] [blame] | 388 | case TPM2_Clear: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 389 | rc |= marshal_clear(ob); |
Vadim Bendebury | 6acb9a6 | 2016-06-30 20:50:49 -0700 | [diff] [blame] | 390 | break; |
| 391 | |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 392 | case TPM2_PCR_Extend: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 393 | rc |= marshal_pcr_extend(ob, tpm_command_body); |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 394 | break; |
| 395 | |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 396 | case TPM2_CR50_VENDOR_COMMAND: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 397 | rc |= marshal_cr50_vendor_command(ob, tpm_command_body); |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 398 | break; |
| 399 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 400 | default: |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 401 | printk(BIOS_INFO, "%s:%d:Request to marshal unsupported command %#x\n", |
| 402 | __FILE__, __LINE__, command); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 403 | rc = -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 404 | } |
| 405 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 406 | if (rc != 0) |
| 407 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 408 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 409 | /* Fix up the command header with known values. */ |
| 410 | rc |= obuf_write_be16(&ob_hdr, car_get_var(tpm_tag)); |
| 411 | rc |= obuf_write_be32(&ob_hdr, obuf_nr_written(ob)); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 412 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 413 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 414 | } |
| 415 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 416 | static int unmarshal_get_capability(struct ibuf *ib, |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 417 | struct get_cap_response *gcr) |
| 418 | { |
| 419 | int i; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 420 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 421 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 422 | rc |= ibuf_read_be8(ib, &gcr->more_data); |
| 423 | rc |= unmarshal_TPM_CAP(ib, &gcr->cd.capability); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 424 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 425 | if (rc != 0) |
| 426 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 427 | |
| 428 | switch (gcr->cd.capability) { |
| 429 | case TPM_CAP_TPM_PROPERTIES: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 430 | if (ibuf_read_be32(ib, &gcr->cd.data.tpmProperties.count)) |
| 431 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 432 | if (gcr->cd.data.tpmProperties.count > ARRAY_SIZE |
| 433 | (gcr->cd.data.tpmProperties.tpmProperty)) { |
| 434 | printk(BIOS_INFO, "%s:%s:%d - %d - too many properties\n", |
| 435 | __FILE__, __func__, __LINE__, |
| 436 | gcr->cd.data.tpmProperties.count); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 437 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 438 | } |
| 439 | for (i = 0; i < gcr->cd.data.tpmProperties.count; i++) { |
| 440 | TPMS_TAGGED_PROPERTY *pp; |
| 441 | |
| 442 | pp = gcr->cd.data.tpmProperties.tpmProperty + i; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 443 | rc |= unmarshal_TPM_PT(ib, &pp->property); |
| 444 | rc |= ibuf_read_be32(ib, &pp->value); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 445 | } |
| 446 | break; |
Frans Hendriks | 589eff7 | 2019-06-26 10:43:40 +0200 | [diff] [blame] | 447 | case TPM_CAP_PCRS: |
| 448 | if (ibuf_read_be32(ib, &gcr->cd.data.assignedPCR.count)) |
| 449 | return -1; |
| 450 | if (gcr->cd.data.assignedPCR.count > |
| 451 | ARRAY_SIZE(gcr->cd.data.assignedPCR.pcrSelections)) { |
| 452 | printk(BIOS_INFO, "%s:%s:%d - %d - too many properties\n", |
| 453 | __FILE__, __func__, __LINE__, |
| 454 | gcr->cd.data.assignedPCR.count); |
| 455 | return -1; |
| 456 | } |
| 457 | for (i = 0; i < gcr->cd.data.assignedPCR.count; i++) { |
| 458 | TPMS_PCR_SELECTION *pp = |
| 459 | &gcr->cd.data.assignedPCR.pcrSelections[i]; |
| 460 | rc |= ibuf_read(ib, pp, sizeof(TPMS_PCR_SELECTION)); |
| 461 | } |
| 462 | break; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 463 | default: |
| 464 | printk(BIOS_ERR, |
| 465 | "%s:%d - unable to unmarshal capability response", |
| 466 | __func__, __LINE__); |
| 467 | printk(BIOS_ERR, " for %d\n", gcr->cd.capability); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 468 | rc = -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 469 | break; |
| 470 | } |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 471 | |
| 472 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 473 | } |
| 474 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 475 | static int unmarshal_TPM2B_MAX_NV_BUFFER(struct ibuf *ib, |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 476 | TPM2B_MAX_NV_BUFFER *nv_buffer) |
| 477 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 478 | if (ibuf_read_be16(ib, &nv_buffer->t.size)) |
| 479 | return -1; |
| 480 | |
| 481 | nv_buffer->t.buffer = ibuf_oob_drain(ib, nv_buffer->t.size); |
| 482 | |
| 483 | if (nv_buffer->t.buffer == NULL) { |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 484 | printk(BIOS_ERR, "%s:%d - " |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 485 | "size mismatch: expected %d, remaining %zd\n", |
| 486 | __func__, __LINE__, nv_buffer->t.size, |
| 487 | ibuf_remaining(ib)); |
| 488 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 489 | } |
| 490 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 491 | return 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 492 | } |
| 493 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 494 | static int unmarshal_nv_read(struct ibuf *ib, struct nv_read_response *nvr) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 495 | { |
| 496 | /* Total size of the parameter field. */ |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 497 | if (ibuf_read_be32(ib, &nvr->params_size)) |
| 498 | return -1; |
| 499 | |
| 500 | if (unmarshal_TPM2B_MAX_NV_BUFFER(ib, &nvr->buffer)) |
| 501 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 502 | |
| 503 | if (nvr->params_size != |
| 504 | (nvr->buffer.t.size + sizeof(nvr->buffer.t.size))) { |
| 505 | printk(BIOS_ERR, |
| 506 | "%s:%d - parameter/buffer %d/%d size mismatch", |
| 507 | __func__, __LINE__, nvr->params_size, |
| 508 | nvr->buffer.t.size); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 509 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 510 | } |
| 511 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 512 | /* |
Frans Hendriks | 8bd5c99 | 2018-10-29 10:47:52 +0100 | [diff] [blame] | 513 | * Let's ignore the authorization section. It should be 5 bytes total, |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 514 | * just confirm that this is the case and report any discrepancy. |
| 515 | */ |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 516 | if (ibuf_remaining(ib) != 5) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 517 | printk(BIOS_ERR, |
Frans Hendriks | 8bd5c99 | 2018-10-29 10:47:52 +0100 | [diff] [blame] | 518 | "%s:%d - unexpected authorization section size %zd\n", |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 519 | __func__, __LINE__, ibuf_remaining(ib)); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 520 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 521 | ibuf_oob_drain(ib, ibuf_remaining(ib)); |
| 522 | |
| 523 | return 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 524 | } |
| 525 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 526 | static int unmarshal_vendor_command(struct ibuf *ib, |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 527 | struct vendor_command_response *vcr) |
| 528 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 529 | if (ibuf_read_be16(ib, &vcr->vc_subcommand)) |
| 530 | return -1; |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 531 | |
| 532 | switch (vcr->vc_subcommand) { |
Keith Short | e0f3400 | 2019-02-05 16:15:10 -0700 | [diff] [blame] | 533 | case TPM2_CR50_SUB_CMD_IMMEDIATE_RESET: |
| 534 | break; |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 535 | case TPM2_CR50_SUB_CMD_NVMEM_ENABLE_COMMITS: |
| 536 | break; |
| 537 | case TPM2_CR50_SUB_CMD_TURN_UPDATE_ON: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 538 | return ibuf_read_be8(ib, &vcr->num_restored_headers); |
Keith Short | e371d42 | 2019-01-11 07:52:32 -0700 | [diff] [blame] | 539 | case TPM2_CR50_SUB_CMD_GET_REC_BTN: |
| 540 | return ibuf_read_be8(ib, &vcr->recovery_button_state); |
Keith Short | e0f3400 | 2019-02-05 16:15:10 -0700 | [diff] [blame] | 541 | case TPM2_CR50_SUB_CMD_TPM_MODE: |
| 542 | return ibuf_read_be8(ib, &vcr->tpm_mode); |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 543 | default: |
| 544 | printk(BIOS_ERR, |
| 545 | "%s:%d - unsupported vendor command %#04x!\n", |
| 546 | __func__, __LINE__, vcr->vc_subcommand); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 547 | return -1; |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 548 | } |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 549 | |
| 550 | return 0; |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 551 | } |
| 552 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 553 | struct tpm2_response *tpm_unmarshal_response(TPM_CC command, struct ibuf *ib) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 554 | { |
Duncan Laurie | 4a56076 | 2016-09-01 16:09:43 -0700 | [diff] [blame] | 555 | static struct tpm2_response tpm2_static_resp CAR_GLOBAL; |
| 556 | struct tpm2_response *tpm2_resp = car_get_var_ptr(&tpm2_static_resp); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 557 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 558 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 559 | rc |= ibuf_read_be16(ib, &tpm2_resp->hdr.tpm_tag); |
| 560 | rc |= ibuf_read_be32(ib, &tpm2_resp->hdr.tpm_size); |
| 561 | rc |= unmarshal_TPM_CC(ib, &tpm2_resp->hdr.tpm_code); |
| 562 | |
| 563 | if (rc != 0) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 564 | return NULL; |
| 565 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 566 | if (ibuf_remaining(ib) == 0) { |
| 567 | if (tpm2_resp->hdr.tpm_size != ibuf_nr_read(ib)) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 568 | printk(BIOS_ERR, |
| 569 | "%s: size mismatch in response to command %#x\n", |
| 570 | __func__, command); |
Duncan Laurie | 4a56076 | 2016-09-01 16:09:43 -0700 | [diff] [blame] | 571 | return tpm2_resp; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 572 | } |
| 573 | |
| 574 | switch (command) { |
| 575 | case TPM2_Startup: |
Joel Kitching | 2e690ee | 2018-11-15 16:48:53 +0800 | [diff] [blame] | 576 | case TPM2_Shutdown: |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 577 | break; |
| 578 | |
| 579 | case TPM2_GetCapability: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 580 | rc |= unmarshal_get_capability(ib, &tpm2_resp->gc); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 581 | break; |
| 582 | |
| 583 | case TPM2_NV_Read: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 584 | rc |= unmarshal_nv_read(ib, &tpm2_resp->nvr); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 585 | break; |
| 586 | |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 587 | case TPM2_Hierarchy_Control: |
Vadim Bendebury | 6acb9a6 | 2016-06-30 20:50:49 -0700 | [diff] [blame] | 588 | case TPM2_Clear: |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 589 | case TPM2_NV_DefineSpace: |
| 590 | case TPM2_NV_Write: |
Vadim Bendebury | 4c0851c | 2016-07-03 17:08:10 -0700 | [diff] [blame] | 591 | case TPM2_NV_WriteLock: |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 592 | case TPM2_PCR_Extend: |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 593 | /* Session data included in response can be safely ignored. */ |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 594 | ibuf_oob_drain(ib, ibuf_remaining(ib)); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 595 | break; |
| 596 | |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 597 | case TPM2_CR50_VENDOR_COMMAND: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 598 | rc |= unmarshal_vendor_command(ib, &tpm2_resp->vcr); |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 599 | break; |
| 600 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 601 | default: |
| 602 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 603 | size_t i; |
| 604 | size_t sz_left; |
| 605 | const uint8_t *data; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 606 | |
| 607 | printk(BIOS_INFO, "%s:%d:" |
| 608 | "Request to unmarshal unexpected command %#x," |
| 609 | " code %#x", |
| 610 | __func__, __LINE__, command, |
Duncan Laurie | 4a56076 | 2016-09-01 16:09:43 -0700 | [diff] [blame] | 611 | tpm2_resp->hdr.tpm_code); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 612 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 613 | sz_left = ibuf_remaining(ib); |
| 614 | data = ibuf_oob_drain(ib, sz_left); |
| 615 | |
| 616 | for (i = 0; i < sz_left; i++) { |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 617 | if (!(i % 16)) |
| 618 | printk(BIOS_INFO, "\n"); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 619 | printk(BIOS_INFO, "%2.2x ", data[i]); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 620 | } |
| 621 | } |
| 622 | printk(BIOS_INFO, "\n"); |
| 623 | return NULL; |
| 624 | } |
| 625 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 626 | if (ibuf_remaining(ib)) { |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 627 | printk(BIOS_INFO, |
| 628 | "%s:%d got %d bytes back in response to %#x," |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 629 | " failed to parse (%zd)\n", |
Duncan Laurie | 4a56076 | 2016-09-01 16:09:43 -0700 | [diff] [blame] | 630 | __func__, __LINE__, tpm2_resp->hdr.tpm_size, |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 631 | command, ibuf_remaining(ib)); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 632 | return NULL; |
| 633 | } |
Richard Spiegel | 248c60a | 2018-08-07 09:24:14 -0700 | [diff] [blame] | 634 | if (rc) |
| 635 | printk(BIOS_WARNING, "Warning: %s had one or more failures.\n", |
| 636 | __func__); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 637 | |
| 638 | /* The entire message have been parsed. */ |
Duncan Laurie | 4a56076 | 2016-09-01 16:09:43 -0700 | [diff] [blame] | 639 | return tpm2_resp; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 640 | } |