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 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 8 | #include <commonlib/iobuf.h> |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 9 | #include <console/console.h> |
| 10 | #include <stdlib.h> |
| 11 | #include <string.h> |
| 12 | |
Philipp Deppenwiese | d88fb36 | 2017-10-18 20:26:18 +0200 | [diff] [blame] | 13 | #include "tss_marshaling.h" |
Philipp Deppenwiese | c07f8fb | 2018-02-27 19:40:52 +0100 | [diff] [blame] | 14 | #include <security/tpm/tss/vendor/cr50/cr50.h> |
Frans Hendriks | 589eff7 | 2019-06-26 10:43:40 +0200 | [diff] [blame] | 15 | #include <security/tpm/tss.h> |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 16 | |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 17 | static uint16_t tpm_tag; /* Depends on the command type. */ |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 18 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 19 | #define unmarshal_TPM_CAP(a, b) ibuf_read_be32(a, b) |
| 20 | #define unmarshal_TPM_CC(a, b) ibuf_read_be32(a, b) |
| 21 | #define unmarshal_TPM_PT(a, b) ibuf_read_be32(a, b) |
| 22 | #define unmarshal_TPM_HANDLE(a, b) ibuf_read_be32(a, b) |
| 23 | |
| 24 | #define marshal_TPM_HANDLE(a, b) obuf_write_be32(a, b) |
| 25 | #define marshal_TPMI_ALG_HASH(a, b) obuf_write_be16(a, b) |
| 26 | |
| 27 | static int marshal_startup(struct obuf *ob, struct tpm2_startup *cmd_body) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 28 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 29 | return obuf_write_be16(ob, cmd_body->startup_type); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 30 | } |
| 31 | |
Joel Kitching | 2e690ee | 2018-11-15 16:48:53 +0800 | [diff] [blame] | 32 | static int marshal_shutdown(struct obuf *ob, struct tpm2_shutdown *cmd_body) |
| 33 | { |
| 34 | return obuf_write_be16(ob, cmd_body->shutdown_type); |
| 35 | } |
| 36 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 37 | static int marshal_get_capability(struct obuf *ob, |
| 38 | struct tpm2_get_capability *cmd_body) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 39 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 40 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 41 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 42 | rc |= obuf_write_be32(ob, cmd_body->capability); |
| 43 | rc |= obuf_write_be32(ob, cmd_body->property); |
| 44 | rc |= obuf_write_be32(ob, cmd_body->propertyCount); |
Vadim Bendebury | bc92710 | 2016-07-07 10:52:46 -0700 | [diff] [blame] | 45 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 46 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 47 | } |
| 48 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 49 | static int marshal_TPM2B(struct obuf *ob, TPM2B *data) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 50 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 51 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 52 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 53 | rc |= obuf_write_be16(ob, data->size); |
| 54 | rc |= obuf_write(ob, data->buffer, data->size); |
Vadim Bendebury | bc92710 | 2016-07-07 10:52:46 -0700 | [diff] [blame] | 55 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 56 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 57 | } |
| 58 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 59 | static int marshal_TPMA_NV(struct obuf *ob, TPMA_NV *nv) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 60 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 61 | uint32_t v; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 62 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 63 | memcpy(&v, nv, sizeof(v)); |
| 64 | return obuf_write_be32(ob, v); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 65 | } |
| 66 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 67 | 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] | 68 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 69 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 70 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 71 | rc |= marshal_TPM_HANDLE(ob, nvpub->nvIndex); |
| 72 | rc |= marshal_TPMI_ALG_HASH(ob, nvpub->nameAlg); |
| 73 | rc |= marshal_TPMA_NV(ob, &nvpub->attributes); |
| 74 | rc |= marshal_TPM2B(ob, &nvpub->authPolicy.b); |
| 75 | rc |= obuf_write_be16(ob, nvpub->dataSize); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 76 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 77 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 78 | } |
| 79 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 80 | static int marshal_TPMT_HA(struct obuf *ob, TPMT_HA *tpmtha) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 81 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 82 | int rc = 0; |
| 83 | |
| 84 | rc |= marshal_TPMI_ALG_HASH(ob, tpmtha->hashAlg); |
Frans Hendriks | aa771cb | 2019-09-04 11:10:27 +0200 | [diff] [blame] | 85 | switch (tpmtha->hashAlg) { |
| 86 | case TPM_ALG_SHA1: |
| 87 | rc |= obuf_write(ob, tpmtha->digest.sha1, |
Frans Hendriks | 7e220ca | 2019-06-28 10:18:22 +0200 | [diff] [blame] | 88 | tlcl_get_hash_size_from_algo(tpmtha->hashAlg)); |
Frans Hendriks | aa771cb | 2019-09-04 11:10:27 +0200 | [diff] [blame] | 89 | break; |
| 90 | case TPM_ALG_SHA256: |
| 91 | rc |= obuf_write(ob, tpmtha->digest.sha256, |
| 92 | tlcl_get_hash_size_from_algo(tpmtha->hashAlg)); |
| 93 | break; |
| 94 | case TPM_ALG_SM3_256: |
| 95 | rc |= obuf_write(ob, tpmtha->digest.sm3_256, |
| 96 | tlcl_get_hash_size_from_algo(tpmtha->hashAlg)); |
| 97 | break; |
| 98 | case TPM_ALG_SHA384: |
| 99 | rc |= obuf_write(ob, tpmtha->digest.sha384, |
| 100 | tlcl_get_hash_size_from_algo(tpmtha->hashAlg)); |
| 101 | break; |
| 102 | case TPM_ALG_SHA512: |
| 103 | rc |= obuf_write(ob, tpmtha->digest.sha512, |
| 104 | tlcl_get_hash_size_from_algo(tpmtha->hashAlg)); |
| 105 | break; |
| 106 | default: |
| 107 | rc = -1; |
| 108 | } |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 109 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 110 | } |
| 111 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 112 | static int marshal_TPML_DIGEST_VALUES(struct obuf *ob, |
| 113 | TPML_DIGEST_VALUES *dvalues) |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 114 | { |
| 115 | int i; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 116 | int rc = 0; |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 117 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 118 | rc |= obuf_write_be32(ob, dvalues->count); |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 119 | for (i = 0; i < dvalues->count; i++) |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 120 | rc |= marshal_TPMT_HA(ob, &dvalues->digests[i]); |
| 121 | |
| 122 | return rc; |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 123 | } |
| 124 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 125 | static int marshal_session_header(struct obuf *ob, |
| 126 | struct tpm2_session_header *session_header) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 127 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 128 | int rc = 0; |
| 129 | struct obuf ob_sz; |
| 130 | size_t prev_written; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 131 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 132 | /* Snapshot current location to place size of header. */ |
| 133 | if (obuf_splice_current(ob, &ob_sz, sizeof(uint32_t)) < 0) |
| 134 | return -1; |
Vadim Bendebury | bc92710 | 2016-07-07 10:52:46 -0700 | [diff] [blame] | 135 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 136 | /* Write a size placeholder. */ |
| 137 | rc |= obuf_write_be32(ob, 0); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 138 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 139 | /* Keep track of session header data size by tracking num written. */ |
| 140 | prev_written = obuf_nr_written(ob); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 141 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 142 | rc |= obuf_write_be32(ob, session_header->session_handle); |
| 143 | rc |= obuf_write_be16(ob, session_header->nonce_size); |
| 144 | rc |= obuf_write(ob, session_header->nonce, session_header->nonce_size); |
| 145 | rc |= obuf_write_be8(ob, session_header->session_attrs); |
| 146 | rc |= obuf_write_be16(ob, session_header->auth_size); |
| 147 | rc |= obuf_write(ob, session_header->auth, session_header->auth_size); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 148 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 149 | /* Fill back in proper size of session header. */ |
| 150 | rc |= obuf_write_be32(&ob_sz, obuf_nr_written(ob) - prev_written); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 151 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 152 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 153 | } |
| 154 | |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 155 | /* |
| 156 | * Common session header can include one or two handles and an empty |
| 157 | * session_header structure. |
| 158 | */ |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 159 | static int marshal_common_session_header(struct obuf *ob, |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 160 | const uint32_t *handles, |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 161 | size_t handle_count) |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 162 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 163 | size_t i; |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 164 | struct tpm2_session_header session_header; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 165 | int rc = 0; |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 166 | |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 167 | tpm_tag = TPM_ST_SESSIONS; |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 168 | |
| 169 | for (i = 0; i < handle_count; i++) |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 170 | rc |= marshal_TPM_HANDLE(ob, handles[i]); |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 171 | |
| 172 | memset(&session_header, 0, sizeof(session_header)); |
| 173 | session_header.session_handle = TPM_RS_PW; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 174 | rc |= marshal_session_header(ob, &session_header); |
| 175 | |
| 176 | return rc; |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 177 | } |
| 178 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 179 | static int marshal_nv_define_space(struct obuf *ob, |
| 180 | struct tpm2_nv_define_space_cmd *nvd_in) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 181 | { |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 182 | const uint32_t handle[] = { TPM_RH_PLATFORM }; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 183 | struct obuf ob_sz; |
| 184 | size_t prev_written; |
| 185 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 186 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 187 | rc |= marshal_common_session_header(ob, handle, ARRAY_SIZE(handle)); |
| 188 | rc |= marshal_TPM2B(ob, &nvd_in->auth.b); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 189 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 190 | /* Snapshot current location to place size field. */ |
| 191 | if (obuf_splice_current(ob, &ob_sz, sizeof(uint16_t)) < 0) |
| 192 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 193 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 194 | /* Put placeholder for size */ |
| 195 | rc |= obuf_write_be16(ob, 0); |
Vadim Bendebury | bc92710 | 2016-07-07 10:52:46 -0700 | [diff] [blame] | 196 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 197 | /* Keep track of nv define space data size by tracking num written. */ |
| 198 | prev_written = obuf_nr_written(ob); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 199 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 200 | rc |= marshal_TPMS_NV_PUBLIC(ob, &nvd_in->publicInfo); |
| 201 | rc |= obuf_write_be16(&ob_sz, obuf_nr_written(ob) - prev_written); |
Vadim Bendebury | bc92710 | 2016-07-07 10:52:46 -0700 | [diff] [blame] | 202 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 203 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 204 | } |
| 205 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 206 | static int marshal_nv_write(struct obuf *ob, |
| 207 | struct tpm2_nv_write_cmd *command_body) |
| 208 | { |
| 209 | int rc = 0; |
| 210 | uint32_t handles[] = { TPM_RH_PLATFORM, command_body->nvIndex }; |
| 211 | |
| 212 | rc |= marshal_common_session_header(ob, handles, ARRAY_SIZE(handles)); |
| 213 | rc |= marshal_TPM2B(ob, &command_body->data.b); |
| 214 | rc |= obuf_write_be16(ob, command_body->offset); |
| 215 | |
| 216 | return rc; |
| 217 | } |
| 218 | |
| 219 | static int marshal_nv_write_lock(struct obuf *ob, |
| 220 | struct tpm2_nv_write_lock_cmd *command_body) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 221 | { |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 222 | uint32_t handles[] = { TPM_RH_PLATFORM, command_body->nvIndex }; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 223 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 224 | return marshal_common_session_header(ob, handles, ARRAY_SIZE(handles)); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 225 | } |
| 226 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 227 | static int marshal_pcr_extend(struct obuf *ob, |
| 228 | struct tpm2_pcr_extend_cmd *command_body) |
Vadim Bendebury | 4c0851c | 2016-07-03 17:08:10 -0700 | [diff] [blame] | 229 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 230 | int rc = 0; |
| 231 | uint32_t handles[] = { command_body->pcrHandle }; |
| 232 | |
| 233 | rc |= marshal_common_session_header(ob, handles, ARRAY_SIZE(handles)); |
| 234 | rc |= marshal_TPML_DIGEST_VALUES(ob, &command_body->digests); |
| 235 | |
| 236 | return rc; |
Vadim Bendebury | 4c0851c | 2016-07-03 17:08:10 -0700 | [diff] [blame] | 237 | } |
| 238 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 239 | static int marshal_nv_read(struct obuf *ob, |
| 240 | struct tpm2_nv_read_cmd *command_body) |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 241 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 242 | int rc = 0; |
Vadim Bendebury | ebba4d7 | 2016-07-07 11:04:06 -0700 | [diff] [blame] | 243 | uint32_t handles[] = { TPM_RH_PLATFORM, command_body->nvIndex }; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 244 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 245 | rc |= marshal_common_session_header(ob, handles, ARRAY_SIZE(handles)); |
| 246 | rc |= obuf_write_be16(ob, command_body->size); |
| 247 | rc |= obuf_write_be16(ob, command_body->offset); |
| 248 | |
| 249 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 250 | } |
| 251 | |
Elyes HAOUAS | 3d45000 | 2018-08-09 18:55:58 +0200 | [diff] [blame] | 252 | /* TPM2_Clear command does not require parameters. */ |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 253 | static int marshal_clear(struct obuf *ob) |
Vadim Bendebury | 6acb9a6 | 2016-06-30 20:50:49 -0700 | [diff] [blame] | 254 | { |
| 255 | const uint32_t handle[] = { TPM_RH_PLATFORM }; |
| 256 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 257 | return marshal_common_session_header(ob, handle, ARRAY_SIZE(handle)); |
Vadim Bendebury | 6acb9a6 | 2016-06-30 20:50:49 -0700 | [diff] [blame] | 258 | } |
| 259 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 260 | static int marshal_selftest(struct obuf *ob, |
| 261 | struct tpm2_self_test *command_body) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 262 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 263 | return obuf_write_be8(ob, command_body->yes_no); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 264 | } |
| 265 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 266 | static int marshal_hierarchy_control(struct obuf *ob, |
| 267 | struct tpm2_hierarchy_control_cmd *command_body) |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 268 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 269 | int rc = 0; |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 270 | struct tpm2_session_header session_header; |
| 271 | |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 272 | tpm_tag = TPM_ST_SESSIONS; |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 273 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 274 | rc |= marshal_TPM_HANDLE(ob, TPM_RH_PLATFORM); |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 275 | memset(&session_header, 0, sizeof(session_header)); |
| 276 | session_header.session_handle = TPM_RS_PW; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 277 | rc |= marshal_session_header(ob, &session_header); |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 278 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 279 | rc |= marshal_TPM_HANDLE(ob, command_body->enable); |
| 280 | rc |= obuf_write_be8(ob, command_body->state); |
| 281 | |
| 282 | return rc; |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 283 | } |
| 284 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 285 | static int marshal_cr50_vendor_command(struct obuf *ob, void *command_body) |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 286 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 287 | int rc = 0; |
| 288 | uint16_t *sub_command = command_body; |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 289 | |
| 290 | switch (*sub_command) { |
Keith Short | e0f3400 | 2019-02-05 16:15:10 -0700 | [diff] [blame] | 291 | case TPM2_CR50_SUB_CMD_IMMEDIATE_RESET: |
| 292 | /* The 16-bit timeout parameter is optional for the |
| 293 | * IMMEDIATE_RESET command. However in coreboot, the timeout |
| 294 | * parameter must be specified. |
| 295 | */ |
| 296 | rc |= obuf_write_be16(ob, sub_command[0]); |
| 297 | rc |= obuf_write_be16(ob, sub_command[1]); |
| 298 | break; |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 299 | case TPM2_CR50_SUB_CMD_NVMEM_ENABLE_COMMITS: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 300 | rc |= obuf_write_be16(ob, *sub_command); |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 301 | break; |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 302 | case TPM2_CR50_SUB_CMD_TURN_UPDATE_ON: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 303 | rc |= obuf_write_be16(ob, sub_command[0]); |
| 304 | rc |= obuf_write_be16(ob, sub_command[1]); |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 305 | break; |
Keith Short | e371d42 | 2019-01-11 07:52:32 -0700 | [diff] [blame] | 306 | case TPM2_CR50_SUB_CMD_GET_REC_BTN: |
| 307 | rc |= obuf_write_be16(ob, *sub_command); |
| 308 | break; |
Keith Short | e0f3400 | 2019-02-05 16:15:10 -0700 | [diff] [blame] | 309 | case TPM2_CR50_SUB_CMD_TPM_MODE: |
| 310 | /* The Cr50 TPM_MODE command supports an optional parameter. |
| 311 | * When the parameter is present the Cr50 will attempt to change |
| 312 | * the TPM state (enable or disable) and returns the new state |
| 313 | * in the response. When the parameter is absent, the Cr50 |
| 314 | * returns the current TPM state. |
| 315 | * |
| 316 | * coreboot currently only uses the TPM get capability and does |
| 317 | * not set a new TPM state with the Cr50. |
| 318 | */ |
| 319 | rc |= obuf_write_be16(ob, *sub_command); |
| 320 | break; |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 321 | default: |
| 322 | /* Unsupported subcommand. */ |
| 323 | printk(BIOS_WARNING, "Unsupported cr50 subcommand: 0x%04x\n", |
| 324 | *sub_command); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 325 | rc = -1; |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 326 | break; |
| 327 | } |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 328 | return rc; |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 329 | } |
| 330 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 331 | 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] | 332 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 333 | struct obuf ob_hdr; |
| 334 | const size_t hdr_sz = sizeof(uint16_t) + 2 * sizeof(uint32_t); |
| 335 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 336 | |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 337 | tpm_tag = TPM_ST_NO_SESSIONS; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 338 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 339 | if (obuf_splice_current(ob, &ob_hdr, hdr_sz) < 0) |
| 340 | return -1; |
| 341 | |
| 342 | /* Write TPM command header with placeholder field values. */ |
| 343 | rc |= obuf_write_be16(ob, 0); |
| 344 | rc |= obuf_write_be32(ob, 0); |
| 345 | rc |= obuf_write_be32(ob, command); |
| 346 | |
| 347 | if (rc != 0) |
| 348 | return rc; |
| 349 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 350 | switch (command) { |
| 351 | case TPM2_Startup: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 352 | rc |= marshal_startup(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 353 | break; |
| 354 | |
Joel Kitching | 2e690ee | 2018-11-15 16:48:53 +0800 | [diff] [blame] | 355 | case TPM2_Shutdown: |
| 356 | rc |= marshal_shutdown(ob, tpm_command_body); |
| 357 | break; |
| 358 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 359 | case TPM2_GetCapability: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 360 | rc |= marshal_get_capability(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 361 | break; |
| 362 | |
| 363 | case TPM2_NV_Read: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 364 | rc |= marshal_nv_read(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 365 | break; |
| 366 | |
| 367 | case TPM2_NV_DefineSpace: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 368 | rc |= marshal_nv_define_space(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 369 | break; |
| 370 | |
| 371 | case TPM2_NV_Write: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 372 | rc |= marshal_nv_write(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 373 | break; |
| 374 | |
Vadim Bendebury | 4c0851c | 2016-07-03 17:08:10 -0700 | [diff] [blame] | 375 | case TPM2_NV_WriteLock: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 376 | rc |= marshal_nv_write_lock(ob, tpm_command_body); |
Vadim Bendebury | 4c0851c | 2016-07-03 17:08:10 -0700 | [diff] [blame] | 377 | break; |
| 378 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 379 | case TPM2_SelfTest: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 380 | rc |= marshal_selftest(ob, tpm_command_body); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 381 | break; |
| 382 | |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 383 | case TPM2_Hierarchy_Control: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 384 | rc |= marshal_hierarchy_control(ob, tpm_command_body); |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 385 | break; |
| 386 | |
Vadim Bendebury | 6acb9a6 | 2016-06-30 20:50:49 -0700 | [diff] [blame] | 387 | case TPM2_Clear: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 388 | rc |= marshal_clear(ob); |
Vadim Bendebury | 6acb9a6 | 2016-06-30 20:50:49 -0700 | [diff] [blame] | 389 | break; |
| 390 | |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 391 | case TPM2_PCR_Extend: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 392 | rc |= marshal_pcr_extend(ob, tpm_command_body); |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 393 | break; |
| 394 | |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 395 | case TPM2_CR50_VENDOR_COMMAND: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 396 | rc |= marshal_cr50_vendor_command(ob, tpm_command_body); |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 397 | break; |
| 398 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 399 | default: |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 400 | printk(BIOS_INFO, "%s:%d:Request to marshal unsupported command %#x\n", |
| 401 | __FILE__, __LINE__, command); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 402 | rc = -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 403 | } |
| 404 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 405 | if (rc != 0) |
| 406 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 407 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 408 | /* Fix up the command header with known values. */ |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 409 | rc |= obuf_write_be16(&ob_hdr, tpm_tag); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 410 | rc |= obuf_write_be32(&ob_hdr, obuf_nr_written(ob)); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 411 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 412 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 413 | } |
| 414 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 415 | static int unmarshal_get_capability(struct ibuf *ib, |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 416 | struct get_cap_response *gcr) |
| 417 | { |
| 418 | int i; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 419 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 420 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 421 | rc |= ibuf_read_be8(ib, &gcr->more_data); |
| 422 | rc |= unmarshal_TPM_CAP(ib, &gcr->cd.capability); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 423 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 424 | if (rc != 0) |
| 425 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 426 | |
| 427 | switch (gcr->cd.capability) { |
| 428 | case TPM_CAP_TPM_PROPERTIES: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 429 | if (ibuf_read_be32(ib, &gcr->cd.data.tpmProperties.count)) |
| 430 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 431 | if (gcr->cd.data.tpmProperties.count > ARRAY_SIZE |
| 432 | (gcr->cd.data.tpmProperties.tpmProperty)) { |
| 433 | printk(BIOS_INFO, "%s:%s:%d - %d - too many properties\n", |
| 434 | __FILE__, __func__, __LINE__, |
| 435 | gcr->cd.data.tpmProperties.count); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 436 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 437 | } |
| 438 | for (i = 0; i < gcr->cd.data.tpmProperties.count; i++) { |
| 439 | TPMS_TAGGED_PROPERTY *pp; |
| 440 | |
| 441 | pp = gcr->cd.data.tpmProperties.tpmProperty + i; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 442 | rc |= unmarshal_TPM_PT(ib, &pp->property); |
| 443 | rc |= ibuf_read_be32(ib, &pp->value); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 444 | } |
| 445 | break; |
Frans Hendriks | 589eff7 | 2019-06-26 10:43:40 +0200 | [diff] [blame] | 446 | case TPM_CAP_PCRS: |
| 447 | if (ibuf_read_be32(ib, &gcr->cd.data.assignedPCR.count)) |
| 448 | return -1; |
| 449 | if (gcr->cd.data.assignedPCR.count > |
| 450 | ARRAY_SIZE(gcr->cd.data.assignedPCR.pcrSelections)) { |
| 451 | printk(BIOS_INFO, "%s:%s:%d - %d - too many properties\n", |
| 452 | __FILE__, __func__, __LINE__, |
| 453 | gcr->cd.data.assignedPCR.count); |
| 454 | return -1; |
| 455 | } |
| 456 | for (i = 0; i < gcr->cd.data.assignedPCR.count; i++) { |
| 457 | TPMS_PCR_SELECTION *pp = |
| 458 | &gcr->cd.data.assignedPCR.pcrSelections[i]; |
| 459 | rc |= ibuf_read(ib, pp, sizeof(TPMS_PCR_SELECTION)); |
| 460 | } |
| 461 | break; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 462 | default: |
| 463 | printk(BIOS_ERR, |
| 464 | "%s:%d - unable to unmarshal capability response", |
| 465 | __func__, __LINE__); |
| 466 | printk(BIOS_ERR, " for %d\n", gcr->cd.capability); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 467 | rc = -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 468 | break; |
| 469 | } |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 470 | |
| 471 | return rc; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 472 | } |
| 473 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 474 | static int unmarshal_TPM2B_MAX_NV_BUFFER(struct ibuf *ib, |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 475 | TPM2B_MAX_NV_BUFFER *nv_buffer) |
| 476 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 477 | if (ibuf_read_be16(ib, &nv_buffer->t.size)) |
| 478 | return -1; |
| 479 | |
| 480 | nv_buffer->t.buffer = ibuf_oob_drain(ib, nv_buffer->t.size); |
| 481 | |
| 482 | if (nv_buffer->t.buffer == NULL) { |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 483 | printk(BIOS_ERR, "%s:%d - " |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 484 | "size mismatch: expected %d, remaining %zd\n", |
| 485 | __func__, __LINE__, nv_buffer->t.size, |
| 486 | ibuf_remaining(ib)); |
| 487 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 488 | } |
| 489 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 490 | return 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 491 | } |
| 492 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 493 | 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] | 494 | { |
| 495 | /* Total size of the parameter field. */ |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 496 | if (ibuf_read_be32(ib, &nvr->params_size)) |
| 497 | return -1; |
| 498 | |
| 499 | if (unmarshal_TPM2B_MAX_NV_BUFFER(ib, &nvr->buffer)) |
| 500 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 501 | |
| 502 | if (nvr->params_size != |
| 503 | (nvr->buffer.t.size + sizeof(nvr->buffer.t.size))) { |
| 504 | printk(BIOS_ERR, |
| 505 | "%s:%d - parameter/buffer %d/%d size mismatch", |
| 506 | __func__, __LINE__, nvr->params_size, |
| 507 | nvr->buffer.t.size); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 508 | return -1; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 509 | } |
| 510 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 511 | /* |
Frans Hendriks | 8bd5c99 | 2018-10-29 10:47:52 +0100 | [diff] [blame] | 512 | * Let's ignore the authorization section. It should be 5 bytes total, |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 513 | * just confirm that this is the case and report any discrepancy. |
| 514 | */ |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 515 | if (ibuf_remaining(ib) != 5) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 516 | printk(BIOS_ERR, |
Frans Hendriks | 8bd5c99 | 2018-10-29 10:47:52 +0100 | [diff] [blame] | 517 | "%s:%d - unexpected authorization section size %zd\n", |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 518 | __func__, __LINE__, ibuf_remaining(ib)); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 519 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 520 | ibuf_oob_drain(ib, ibuf_remaining(ib)); |
| 521 | |
| 522 | return 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 523 | } |
| 524 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 525 | static int unmarshal_vendor_command(struct ibuf *ib, |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 526 | struct vendor_command_response *vcr) |
| 527 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 528 | if (ibuf_read_be16(ib, &vcr->vc_subcommand)) |
| 529 | return -1; |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 530 | |
| 531 | switch (vcr->vc_subcommand) { |
Keith Short | e0f3400 | 2019-02-05 16:15:10 -0700 | [diff] [blame] | 532 | case TPM2_CR50_SUB_CMD_IMMEDIATE_RESET: |
| 533 | break; |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 534 | case TPM2_CR50_SUB_CMD_NVMEM_ENABLE_COMMITS: |
| 535 | break; |
| 536 | case TPM2_CR50_SUB_CMD_TURN_UPDATE_ON: |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 537 | return ibuf_read_be8(ib, &vcr->num_restored_headers); |
Keith Short | e371d42 | 2019-01-11 07:52:32 -0700 | [diff] [blame] | 538 | case TPM2_CR50_SUB_CMD_GET_REC_BTN: |
| 539 | return ibuf_read_be8(ib, &vcr->recovery_button_state); |
Keith Short | e0f3400 | 2019-02-05 16:15:10 -0700 | [diff] [blame] | 540 | case TPM2_CR50_SUB_CMD_TPM_MODE: |
| 541 | return ibuf_read_be8(ib, &vcr->tpm_mode); |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 542 | default: |
| 543 | printk(BIOS_ERR, |
| 544 | "%s:%d - unsupported vendor command %#04x!\n", |
| 545 | __func__, __LINE__, vcr->vc_subcommand); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 546 | return -1; |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 547 | } |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 548 | |
| 549 | return 0; |
Vadim Bendebury | 021ec28 | 2017-03-22 16:01:53 -0700 | [diff] [blame] | 550 | } |
| 551 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 552 | struct tpm2_response *tpm_unmarshal_response(TPM_CC command, struct ibuf *ib) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 553 | { |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 554 | static struct tpm2_response tpm2_static_resp; |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 555 | int rc = 0; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 556 | |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 557 | rc |= ibuf_read_be16(ib, &tpm2_static_resp.hdr.tpm_tag); |
| 558 | rc |= ibuf_read_be32(ib, &tpm2_static_resp.hdr.tpm_size); |
| 559 | rc |= unmarshal_TPM_CC(ib, &tpm2_static_resp.hdr.tpm_code); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 560 | |
| 561 | if (rc != 0) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 562 | return NULL; |
| 563 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 564 | if (ibuf_remaining(ib) == 0) { |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 565 | if (tpm2_static_resp.hdr.tpm_size != ibuf_nr_read(ib)) |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 566 | printk(BIOS_ERR, |
| 567 | "%s: size mismatch in response to command %#x\n", |
| 568 | __func__, command); |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 569 | return &tpm2_static_resp; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 570 | } |
| 571 | |
| 572 | switch (command) { |
| 573 | case TPM2_Startup: |
Joel Kitching | 2e690ee | 2018-11-15 16:48:53 +0800 | [diff] [blame] | 574 | case TPM2_Shutdown: |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 575 | break; |
| 576 | |
| 577 | case TPM2_GetCapability: |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 578 | rc |= unmarshal_get_capability(ib, &tpm2_static_resp.gc); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 579 | break; |
| 580 | |
| 581 | case TPM2_NV_Read: |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 582 | rc |= unmarshal_nv_read(ib, &tpm2_static_resp.nvr); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 583 | break; |
| 584 | |
Aaron Durbin | f56c778 | 2017-01-10 17:44:42 -0600 | [diff] [blame] | 585 | case TPM2_Hierarchy_Control: |
Vadim Bendebury | 6acb9a6 | 2016-06-30 20:50:49 -0700 | [diff] [blame] | 586 | case TPM2_Clear: |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 587 | case TPM2_NV_DefineSpace: |
| 588 | case TPM2_NV_Write: |
Vadim Bendebury | 4c0851c | 2016-07-03 17:08:10 -0700 | [diff] [blame] | 589 | case TPM2_NV_WriteLock: |
Vadim Bendebury | f5ef699 | 2016-07-03 22:20:17 -0700 | [diff] [blame] | 590 | case TPM2_PCR_Extend: |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 591 | /* Session data included in response can be safely ignored. */ |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 592 | ibuf_oob_drain(ib, ibuf_remaining(ib)); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 593 | break; |
| 594 | |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 595 | case TPM2_CR50_VENDOR_COMMAND: |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 596 | rc |= unmarshal_vendor_command(ib, &tpm2_static_resp.vcr); |
Aaron Durbin | eeb7737 | 2017-03-08 11:23:11 -0600 | [diff] [blame] | 597 | break; |
| 598 | |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 599 | default: |
| 600 | { |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 601 | size_t i; |
| 602 | size_t sz_left; |
| 603 | const uint8_t *data; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 604 | |
| 605 | printk(BIOS_INFO, "%s:%d:" |
| 606 | "Request to unmarshal unexpected command %#x," |
| 607 | " code %#x", |
| 608 | __func__, __LINE__, command, |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 609 | tpm2_static_resp.hdr.tpm_code); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 610 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 611 | sz_left = ibuf_remaining(ib); |
| 612 | data = ibuf_oob_drain(ib, sz_left); |
| 613 | |
| 614 | for (i = 0; i < sz_left; i++) { |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 615 | if (!(i % 16)) |
| 616 | printk(BIOS_INFO, "\n"); |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 617 | printk(BIOS_INFO, "%2.2x ", data[i]); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 618 | } |
| 619 | } |
| 620 | printk(BIOS_INFO, "\n"); |
| 621 | return NULL; |
| 622 | } |
| 623 | |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 624 | if (ibuf_remaining(ib)) { |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 625 | printk(BIOS_INFO, |
| 626 | "%s:%d got %d bytes back in response to %#x," |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 627 | " failed to parse (%zd)\n", |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 628 | __func__, __LINE__, tpm2_static_resp.hdr.tpm_size, |
Aaron Durbin | ee049fa | 2017-03-25 00:38:45 -0500 | [diff] [blame] | 629 | command, ibuf_remaining(ib)); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 630 | return NULL; |
| 631 | } |
Richard Spiegel | 248c60a | 2018-08-07 09:24:14 -0700 | [diff] [blame] | 632 | if (rc) |
| 633 | printk(BIOS_WARNING, "Warning: %s had one or more failures.\n", |
| 634 | __func__); |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 635 | |
| 636 | /* The entire message have been parsed. */ |
Arthur Heymans | 0ca944b | 2019-11-20 19:51:06 +0100 | [diff] [blame^] | 637 | return &tpm2_static_resp; |
Vadim Bendebury | 627afc2 | 2016-06-19 12:13:18 -0700 | [diff] [blame] | 638 | } |