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path: root/lib/libtpm/tcgbios.c
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2023-02-28Fix typos in the remaining lib foldersThomas Huth1-2/+2
Found with the "codespell" utility. Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2021-10-01tcgbios: Disable platform hierarchy in case of failureStefan Berger1-0/+1
In the rare case of a TPM 2 failure, disable the platform hierarchy after disabling the endorsement and owner hierarchies. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2021-07-11tcgbios: Use The proper sha function for each PCR bankStefan Berger1-10/+32
Instead of just using sha256 for all PCR banks (and truncating the value or zero-padding it) use the proper hash function for each one of the banks. For unimplemented hashes, fill the buffer with 0xff. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2021-07-11tcgbios: Change format of S_CRTM_VERSION string to ucs-2Stefan Berger1-11/+12
Change the format of the S_CRTM_VERSION string to ucs-2 since this is what seems to be commonly used by other firmwares following insight from a TCG work group member. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Tested-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2021-07-11tpm: Add firmware API call 2HASH-EXT-LOGStefan Berger1-0/+15
Add a new firmware API call with the name 2HASH-EXT-LOG that will be used by trusted grub for measuring, logging, and extending TPM PCRs. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2021-07-09tcgbios: Add implementations for sha1, sha384, and sha512Stefan Berger1-1/+1
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2021-06-15tcgbios: Fix details in log entriesStefan Berger1-2/+3
Fix two details of the logs: - Set the filed SpecErrata to 2 as required by specs. - Write the separator into the log entry's event field. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2021-02-12libtpm: Compile with -WextraAlexey Kardashevskiy1-5/+5
-Wextra enables a bunch of rather useful checks which this fixes. Note this adds MIN() in tpm_gpt_set_lba1() so it may potentially fail which is unlikely as the length comes from disk-label's block-size which is used in other places. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2021-01-28helpers: Define MIN()Alexey Kardashevskiy1-2/+0
We already have MAX() defined, add MIN() to the common helpers header. Using the common helper also fixes a bug in tpmdrivers's MIN() where it was reverted. Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> --- Changes: v2: * updated the comment about a fixed bug
2020-05-13tcgbios: Implement tpm_hash_log_extend_event_bufferStefan Berger1-0/+44
Implement tpm_hash_log_extend_event_buffer() that allows to measure the contents of a buffer into a given PCR and log it with the given event type and description. The caller may choose to have the size of an ELF image file detected so that only data from the ELF image are hashed rather than the much larger buffer. Besides using this function call now for measuring the bootloader read from a GPT partition, we also intend to use it for calls from the firmware API that allow us to measure and log data from a boot loader, such as grub. Grub will then invoke this function with a buffer whose size it knows and will not need the ELF file size detection. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2020-05-13tcgbios: Add support for SHA3 type of algorithmsStefan Berger1-3/+23
Add support for SHA3 type of algorithms that the vTPM may support some time in the future. The algorithms are assigned in "TCG Algorithm Registry" https://trustedcomputinggroup.org/resource/tcg-algorithm-registry/ Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2020-05-13tcgbios: Fix the vendorInfoSize to be of type uint8_tStefan Berger1-2/+2
The vendorInfoSize is a uint8_t rather than a uint32_t. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2020-05-13tcgbios: Only write logs for PCRs that are allocatedStefan Berger1-10/+25
Only write the logs for those PCRs that are allocated in banks. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2020-02-21tcgbios: Measure the GPT tableStefan Berger1-0/+88
Measure and log the GPT table including LBA1 and all GPT table entries with a non-zero Type GUID. We follow the specification "TCG PC Client Platform Firmware Profile Specification" for the format of what needs to be logged and measured. See section "Event Logging" subsection "Measuring UEFI Variables" for the UEFI_GPT_DATA structure. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2020-02-21tcgbios: Implement menu to clear TPM 2 and activate its PCR banksStefan Berger1-0/+348
Implement a TPM 2 menu and enable the user to clear the TPM and its activate PCR banks. The main TPM menu is activated by pressing the 't' key during firmware startup. Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Kevin O'Connor <kevin@koconnor.net> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
2020-02-21tcgbios: Add TPM 2.0 support and firmware APIStefan Berger1-0/+925
This patch adds TPM 2.0 support along with the firmware API that Linux uses to transfer the firmware log. The firmware API follows the "PFW Virtual TPM Driver" specification. The API has callers in existing Linux code (prom_init.c) from TPM 1.2 times but the API also works for TPM 2.0 without modifications. The TPM 2.0 support logs PCR extensions of measurements of code and data. For this part we follow the TCG specification "TCG PC Client Platform Firmware Profile Specification" (section "Event Logging"). Other relevant specs for the construction of TPM commands are: - Trusted Platform Module Library; Part 2 Structures - Trusted Platform Module Library; Part 3 Commands Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Signed-off-by: Kevin O'Connor <kevin@koconnor.net> [aik: removed new blank lines at EOF] Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
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