5e5937822a
These functions should really be available outside the TPM code, so that other callers can find out which version the TPM is. Rename them to have a tpm_ prefix() and add them to the header file. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
333 lines
9.6 KiB
C
333 lines
9.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2013 The Chromium OS Authors.
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* Coypright (c) 2013 Guntermann & Drunck GmbH
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*/
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#ifndef __TPM_API_H
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#define __TPM_API_H
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#include <tpm-common.h>
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#include <tpm-v1.h>
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#include <tpm-v2.h>
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/**
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* Issue a TPM_Startup command.
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*
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* @param dev TPM device
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* @param mode TPM startup mode
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* Return: return code of the operation
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*/
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u32 tpm_startup(struct udevice *dev, enum tpm_startup_type mode);
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/**
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* Issue a TPM_SelfTestFull command.
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*
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* @param dev TPM device
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* Return: return code of the operation
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*/
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u32 tpm_self_test_full(struct udevice *dev);
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/**
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* Issue a TPM_ContinueSelfTest command.
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*
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* @param dev TPM device
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* Return: return code of the operation
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*/
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u32 tpm_continue_self_test(struct udevice *dev);
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/**
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* Issue a TPM_NV_DefineSpace command. The implementation is limited
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* to specify TPM_NV_ATTRIBUTES and size of the area. The area index
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* could be one of the special value listed in enum tpm_nv_index.
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*
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* @param dev TPM device
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* @param index index of the area
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* @param perm TPM_NV_ATTRIBUTES of the area
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* @param size size of the area
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* Return: return code of the operation
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*/
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u32 tpm_nv_define_space(struct udevice *dev, u32 index, u32 perm, u32 size);
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/**
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* Issue a TPM_NV_ReadValue command. This implementation is limited
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* to read the area from offset 0. The area index could be one of
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* the special value listed in enum tpm_nv_index.
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*
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* @param dev TPM device
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* @param index index of the area
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* @param data output buffer of the area contents
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* @param count size of output buffer
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* Return: return code of the operation
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*/
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u32 tpm_nv_read_value(struct udevice *dev, u32 index, void *data, u32 count);
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/**
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* Issue a TPM_NV_WriteValue command. This implementation is limited
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* to write the area from offset 0. The area index could be one of
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* the special value listed in enum tpm_nv_index.
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*
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* @param dev TPM device
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* @param index index of the area
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* @param data input buffer to be wrote to the area
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* @param length length of data bytes of input buffer
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* Return: return code of the operation
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*/
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u32 tpm_nv_write_value(struct udevice *dev, u32 index, const void *data,
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u32 length);
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/**
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* Issue a TPM_Extend command.
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*
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* @param dev TPM device
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* @param index index of the PCR
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* @param in_digest 160-bit value representing the event to be
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* recorded
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* @param out_digest 160-bit PCR value after execution of the
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* command
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* Return: return code of the operation
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*/
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u32 tpm_pcr_extend(struct udevice *dev, u32 index, const void *in_digest,
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void *out_digest);
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/**
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* Issue a TPM_PCRRead command.
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*
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* @param dev TPM device
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* @param index index of the PCR
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* @param data output buffer for contents of the named PCR
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* @param count size of output buffer
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* Return: return code of the operation
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*/
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u32 tpm_pcr_read(struct udevice *dev, u32 index, void *data, size_t count);
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/**
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* Issue a TSC_PhysicalPresence command. TPM physical presence flag
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* is bit-wise OR'ed of flags listed in enum tpm_physical_presence.
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*
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* @param dev TPM device
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* @param presence TPM physical presence flag
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* Return: return code of the operation
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*/
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u32 tpm_tsc_physical_presence(struct udevice *dev, u16 presence);
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/**
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* Issue a TPM_ReadPubek command.
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*
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* @param dev TPM device
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* @param data output buffer for the public endorsement key
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* @param count size of output buffer
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* Return: return code of the operation
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*/
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u32 tpm_read_pubek(struct udevice *dev, void *data, size_t count);
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/**
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* Issue a TPM_ForceClear command.
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*
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* @param dev TPM device
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* Return: return code of the operation
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*/
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u32 tpm_force_clear(struct udevice *dev);
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/**
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* Issue a TPM_PhysicalEnable command.
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*
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* @param dev TPM device
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* Return: return code of the operation
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*/
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u32 tpm_physical_enable(struct udevice *dev);
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/**
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* Issue a TPM_PhysicalDisable command.
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*
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* @param dev TPM device
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* Return: return code of the operation
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*/
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u32 tpm_physical_disable(struct udevice *dev);
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/**
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* Issue a TPM_PhysicalSetDeactivated command.
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*
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* @param dev TPM device
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* @param state boolean state of the deactivated flag
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* Return: return code of the operation
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*/
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u32 tpm_physical_set_deactivated(struct udevice *dev, u8 state);
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/**
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* Issue a TPM_GetCapability command. This implementation is limited
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* to query sub_cap index that is 4-byte wide.
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*
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* @param dev TPM device
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* @param cap_area partition of capabilities
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* @param sub_cap further definition of capability, which is
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* limited to be 4-byte wide
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* @param cap output buffer for capability information
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* @param count size of output buffer
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* Return: return code of the operation
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*/
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u32 tpm_get_capability(struct udevice *dev, u32 cap_area, u32 sub_cap,
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void *cap, size_t count);
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/**
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* Issue a TPM_FlushSpecific command for a AUTH resource.
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*
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* @param dev TPM device
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* @param auth_handle handle of the auth session
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* Return: return code of the operation
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*/
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u32 tpm_terminate_auth_session(struct udevice *dev, u32 auth_handle);
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/**
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* Issue a TPM_OIAP command to setup an object independent authorization
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* session.
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* Information about the session is stored internally.
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* If there was already an OIAP session active it is terminated and a new
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* session is set up.
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*
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* @param dev TPM device
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* @param auth_handle pointer to the (new) auth handle or NULL.
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* Return: return code of the operation
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*/
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u32 tpm_oiap(struct udevice *dev, u32 *auth_handle);
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/**
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* Ends an active OIAP session.
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*
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* @param dev TPM device
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* Return: return code of the operation
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*/
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u32 tpm_end_oiap(struct udevice *dev);
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/**
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* Issue a TPM_LoadKey2 (Auth1) command using an OIAP session for authenticating
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* the usage of the parent key.
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*
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* @param dev TPM device
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* @param parent_handle handle of the parent key.
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* @param key pointer to the key structure (TPM_KEY or TPM_KEY12).
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* @param key_length size of the key structure
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* @param parent_key_usage_auth usage auth for the parent key
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* @param key_handle pointer to the key handle
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* Return: return code of the operation
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*/
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u32 tpm_load_key2_oiap(struct udevice *dev, u32 parent_handle, const void *key,
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size_t key_length, const void *parent_key_usage_auth,
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u32 *key_handle);
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/**
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* Issue a TPM_GetPubKey (Auth1) command using an OIAP session for
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* authenticating the usage of the key.
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*
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* @param dev TPM device
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* @param key_handle handle of the key
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* @param usage_auth usage auth for the key
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* @param pubkey pointer to the pub key buffer; may be NULL if the pubkey
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* should not be stored.
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* @param pubkey_len pointer to the pub key buffer len. On entry: the size of
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* the provided pubkey buffer. On successful exit: the size
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* of the stored TPM_PUBKEY structure (iff pubkey != NULL).
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* Return: return code of the operation
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*/
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u32 tpm_get_pub_key_oiap(struct udevice *dev, u32 key_handle,
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const void *usage_auth, void *pubkey,
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size_t *pubkey_len);
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/**
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* Get the TPM permissions
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*
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* @param dev TPM device
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* @param perm Returns permissions value
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* Return: return code of the operation
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*/
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u32 tpm_get_permissions(struct udevice *dev, u32 index, u32 *perm);
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/**
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* Flush a resource with a given handle and type from the TPM
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*
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* @param dev TPM device
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* @param key_handle handle of the resource
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* @param resource_type type of the resource
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* Return: return code of the operation
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*/
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u32 tpm_flush_specific(struct udevice *dev, u32 key_handle, u32 resource_type);
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#ifdef CONFIG_TPM_LOAD_KEY_BY_SHA1
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/**
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* Search for a key by usage AuthData and the hash of the parent's pub key.
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*
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* @param dev TPM device
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* @param auth Usage auth of the key to search for
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* @param pubkey_digest SHA1 hash of the pub key structure of the key
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* @param[out] handle The handle of the key (Non-null iff found)
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* Return: 0 if key was found in TPM; != 0 if not.
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*/
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u32 tpm_find_key_sha1(struct udevice *dev, const u8 auth[20],
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const u8 pubkey_digest[20], u32 *handle);
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#endif /* CONFIG_TPM_LOAD_KEY_BY_SHA1 */
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/**
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* Read random bytes from the TPM RNG. The implementation deals with the fact
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* that the TPM may legally return fewer bytes than requested by retrying
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* until @p count bytes have been received.
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*
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* @param dev TPM device
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* @param data output buffer for the random bytes
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* @param count size of output buffer
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* Return: return code of the operation
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*/
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u32 tpm_get_random(struct udevice *dev, void *data, u32 count);
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/**
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* tpm_finalise_physical_presence() - Finalise physical presence
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*
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* @param dev TPM device
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* Return: return code of the operation (0 = success)
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*/
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u32 tpm_finalise_physical_presence(struct udevice *dev);
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/**
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* tpm_nv_enable_locking() - lock the non-volatile space
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*
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* @param dev TPM device
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* Return: return code of the operation (0 = success)
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*/
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u32 tpm_nv_enable_locking(struct udevice *dev);
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/**
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* tpm_set_global_lock() - set the global lock
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*
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* @param dev TPM device
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* Return: return code of the operation (0 = success)
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*/
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u32 tpm_set_global_lock(struct udevice *dev);
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/**
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* tpm_write_lock() - lock the non-volatile space
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*
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* @param dev TPM device
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* @param index Index of space to lock
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* Return: return code of the operation (0 = success)
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*/
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u32 tpm_write_lock(struct udevice *dev, u32 index);
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/**
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* tpm_resume() - start up the TPM from resume (after suspend)
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*
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* @param dev TPM device
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* Return: return code of the operation (0 = success)
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*/
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u32 tpm_resume(struct udevice *dev);
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static inline bool tpm_is_v1(struct udevice *dev)
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{
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return IS_ENABLED(CONFIG_TPM_V1) && tpm_get_version(dev) == TPM_V1;
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}
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static inline bool tpm_is_v2(struct udevice *dev)
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{
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return IS_ENABLED(CONFIG_TPM_V2) && tpm_get_version(dev) == TPM_V2;
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}
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#endif /* __TPM_API_H */
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