/* * This file is part of the coreboot project. * * Copyright (c) 2013 The Chromium OS Authors. All rights reserved. * Copyright 2018 Facebook Inc. * Copyright 2018 Siemens AG * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #ifndef TSPI_H_ #define TSPI_H_ #include #include #include #include #define TPM_PCR_MAX_LEN 64 #define HASH_DATA_CHUNK_SIZE 1024 /** * Clears the pre-RAM tcpa log data and initializes * any content with default values */ void tcpa_preram_log_clear(void); /** * Add table entry for cbmem TCPA log. * @param name Name of the hashed data * @param pcr PCR used to extend hashed data * @param diget_algo sets the digest algorithm * @param digest sets the hash extended into the tpm * @param digest_len the length of the digest */ void tcpa_log_add_table_entry(const char *name, const uint32_t pcr, enum vb2_hash_algorithm digest_algo, const uint8_t *digest, const size_t digest_len); /** * Dump TCPA log entries on console */ void tcpa_log_dump(void *unused); /** * Ask vboot for a digest and extend a TPM PCR with it. * @param pcr sets the pcr index * @param diget_algo sets the digest algorithm * @param digest sets the hash to extend into the tpm * @param digest_len the length of the digest * @param name sets additional info where the digest comes from * @return TPM_SUCCESS on success. If not a tpm error is returned */ uint32_t tpm_extend_pcr(int pcr, enum vb2_hash_algorithm digest_algo, uint8_t *digest, size_t digest_len, const char *name); /** * Issue a TPM_Clear and reenable/reactivate the TPM. * @return TPM_SUCCESS on success. If not a tpm error is returned */ uint32_t tpm_clear_and_reenable(void); /** * Start the TPM and establish the root of trust. * @param s3flag tells the tpm setup if we wake up from a s3 state on x86 * @return TPM_SUCCESS on success. If not a tpm error is returned */ uint32_t tpm_setup(int s3flag); /** * Measure a given region device and extend given PCR with the result. * @param *rdev Pointer to the region device to measure * @param pcr Index of the PCR which will be extended by this measure * @param *rname Name of the region that is measured * @return TPM error code in case of error otherwise TPM_SUCCESS */ uint32_t tpm_measure_region(const struct region_device *rdev, uint8_t pcr, const char *rname); #endif /* TSPI_H_ */