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5be84679e5
Implement TlclSendReceive and TlclPacketSize required for sending raw commands. BRANCH=none BUG=chrome-os-partner:55210 TEST=boot on kevin, verify that 'tpmc raw' works Change-Id: Iba41b95dd7790a6b7a3a7af6cf5f897f45dce1e5 Reviewed-on: https://chromium-review.googlesource.com/363033 Commit-Ready: Andrey Pronin <apronin@chromium.org> Tested-by: Andrey Pronin <apronin@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org>
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
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* Copyright 2016 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef __SRC_LIB_TPM2_MARSHALING_H
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#define __SRC_LIB_TPM2_MARSHALING_H
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#include "tss_constants.h"
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/* The below functions are used to serialize/deserialize TPM2 commands. */
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/**
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* tpm_marshal_command
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*
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* Given a structure containing a TPM2 command, serialize the structure for
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* sending it to the TPM.
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*
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* @command: code of the TPM2 command to marshal
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* @tpm_command_body: a pointer to the command specific structure
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* @buffer: buffer where command is marshaled to
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* @buffer_size: size of the buffer
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*
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* Returns number of bytes placed in the buffer, or -1 on error.
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*
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*/
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int tpm_marshal_command(TPM_CC command, void *tpm_command_body,
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void *buffer, int buffer_size);
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/**
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* tpm_unmarshal_response
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*
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* Given a buffer received from the TPM in response to a certain command,
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* deserialize the buffer into the expeced response structure.
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*
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* struct tpm2_response is a union of all possible responses.
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*
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* @command: code of the TPM2 command for which a response is unmarshaled
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* @response_body: buffer containing the serialized response.
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* @response_size: number of bytes in the buffer containing response
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*
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* Returns a pointer to the deserialized response or NULL in case of
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* unmarshaling problems.
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*/
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struct tpm2_response *tpm_unmarshal_response(TPM_CC command,
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void *response_body,
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int response_size);
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/**
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* tpm_get_packet_size
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*
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* @packet: pointer to the start of the command or response packet.
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*
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* Returns the size of the tpm packet.
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*/
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uint32_t tpm_get_packet_size(const uint8_t *packet);
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/**
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* tpm_get_packet_response_code
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*
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* @packet: pointer to the start of the response packet.
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*
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* Returns the response code.
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*/
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uint32_t tpm_get_packet_response_code(const uint8_t *packet);
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/**
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* tpm_set_ph_disabled
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*
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* Sets the flag that indicates if platform hierarchy is disabled.
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* Certain commands, like NV_Read, may need to use different
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* authorization if platform hierarchy is disabled.
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*
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* @flag: 1 if platform hierarchy is disabled, 0 otherwise
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*/
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void tpm_set_ph_disabled(int flag);
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/**
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* tpm_is_ph_disabled
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*
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* Gets the flag that indicates if platform hierarchy is disabled.
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* Certain commands, like NV_Read, may need to use different
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* authorization if platform hierarchy is disabled.
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*
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* Returns 1 if platform hierarchy is disabled, 0 otherwise
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*/
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int tpm_is_ph_disabled(void);
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#endif // __SRC_LIB_TPM2_MARSHALING_H
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