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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2024 SUSE LLC
* Copyright (C) 2024 Free Software Foundation, Inc.
*
* GRUB 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, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB 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.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/mm.h>
#include <grub/emu/misc.h>
#include <tss2_buffer.h>
#include <tss2_structs.h>
#include <tcg2.h>
grub_err_t
grub_tcg2_get_max_output_size (grub_size_t *size)
{
if (size == NULL)
return GRUB_ERR_BAD_ARGUMENT;
*size = GRUB_TPM2_BUFFER_CAPACITY;
return GRUB_ERR_NONE;
}
grub_err_t
grub_tcg2_submit_command (grub_size_t input_size, grub_uint8_t *input,
grub_size_t output_size, grub_uint8_t *output)
{
if (grub_util_tpm_write (input, input_size) != input_size)
return GRUB_ERR_BAD_DEVICE;
if (grub_util_tpm_read (output, output_size) < sizeof (TPM_RESPONSE_HEADER_t))
return GRUB_ERR_BAD_DEVICE;
return GRUB_ERR_NONE;
}
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