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// ===================================================================
//
// Copyright (c) 2005, Intel Corp.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Intel Corporation nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
// OF THE POSSIBILITY OF SUCH DAMAGE.
// ===================================================================
//
// dmictl.c
//
// Functions for creating and destroying DMIs
//
// ==================================================================
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include "vtpmpriv.h"
#include "bsg.h"
#include "buffer.h"
#include "log.h"
#include "hashtable.h"
#include "hashtable_itr.h"
#include "vtpm_ipc.h"
#define TPM_EMULATOR_PATH "/usr/bin/vtpmd"
// if dmi_res is non-null, then return a pointer to new object.
// Also, this does not fill in the measurements. They should be filled by
// design dependent code or saveNVM
TPM_RESULT init_dmi(UINT32 dmi_id, BYTE type, VTPM_DMI_RESOURCE **dmi_res) {
TPM_RESULT status=TPM_SUCCESS;
VTPM_DMI_RESOURCE *new_dmi=NULL;
UINT32 *dmi_id_key=NULL;
if ((new_dmi = (VTPM_DMI_RESOURCE *) malloc (sizeof(VTPM_DMI_RESOURCE))) == NULL) {
status = TPM_RESOURCES;
goto abort_egress;
}
memset(new_dmi, 0, sizeof(VTPM_DMI_RESOURCE));
new_dmi->dmi_id = dmi_id;
new_dmi->connected = FALSE;
new_dmi->TCSContext = 0;
new_dmi->NVMLocation = (char *) malloc(11 + strlen(DMI_NVM_FILE));
sprintf(new_dmi->NVMLocation, DMI_NVM_FILE, (uint32_t) new_dmi->dmi_id);
if ((dmi_id_key = (UINT32 *) malloc (sizeof(UINT32))) == NULL) {
status = TPM_RESOURCES;
goto abort_egress;
}
*dmi_id_key = new_dmi->dmi_id;
// install into map
if (!hashtable_insert(vtpm_globals->dmi_map, dmi_id_key, new_dmi)){
vtpmlogerror(VTPM_LOG_VTPM, "Failed to insert instance into table. Aborting.\n", dmi_id);
status = TPM_FAIL;
goto abort_egress;
}
if (dmi_res)
*dmi_res = new_dmi;
goto egress;
abort_egress:
if (new_dmi) {
free(new_dmi->NVMLocation);
free(new_dmi);
}
free(dmi_id_key);
egress:
return status;
}
TPM_RESULT close_dmi(VTPM_DMI_RESOURCE *dmi_res) {
if (dmi_res == NULL)
return TPM_SUCCESS;
if (dmi_res->dmi_id == VTPM_CTL_DM)
return(TPM_BAD_PARAMETER);
TCS_CloseContext(dmi_res->TCSContext);
dmi_res->connected = FALSE;
vtpm_globals->connected_dmis--;
return (VTPM_Close_DMI_Extra(dmi_res) );
}
TPM_RESULT VTPM_Handle_New_DMI(const buffer_t *param_buf) {
VTPM_DMI_RESOURCE *new_dmi=NULL;
TPM_RESULT status=TPM_FAIL;
BYTE type, startup_mode;
UINT32 dmi_id;
if (param_buf == NULL) { // Assume creation of Dom 0 control
type = VTPM_TYPE_NON_MIGRATABLE;
dmi_id = VTPM_CTL_DM;
} else if (buffer_len(param_buf) != sizeof(BYTE) + sizeof(BYTE) + sizeof(UINT32)) {
vtpmloginfo(VTPM_LOG_VTPM, "New DMI command wrong length: %d.\n", buffer_len(param_buf));
status = TPM_BAD_PARAMETER;
goto abort_egress;
} else {
vtpm_globals->connected_dmis++; // Put this here so we don't count Dom0
BSG_UnpackList( param_buf->bytes, 3,
BSG_TYPE_BYTE, &type,
BSG_TYPE_BYTE, &startup_mode,
BSG_TYPE_UINT32, &dmi_id);
}
new_dmi = (VTPM_DMI_RESOURCE *) hashtable_search(vtpm_globals->dmi_map, &dmi_id);
if (new_dmi == NULL) {
vtpmloginfo(VTPM_LOG_VTPM, "Creating new DMI instance %d attached.\n", dmi_id );
// Brand New DMI. Initialize the persistent pieces
TPMTRYRETURN(init_dmi(dmi_id, type, &new_dmi) );
} else
vtpmloginfo(VTPM_LOG_VTPM, "Re-attaching DMI instance %d.\n", dmi_id);
if (type != VTPM_TYPE_MIGRATED) {
new_dmi->dmi_type = type;
} else {
vtpmlogerror(VTPM_LOG_VTPM, "Creation of VTPM with illegal type.\n");
status = TPM_BAD_PARAMETER;
goto abort_egress;
}
if (new_dmi->connected) {
vtpmlogerror(VTPM_LOG_VTPM, "Attempt to re-attach, currently attached instance %d. Ignoring\n", dmi_id);
status = TPM_BAD_PARAMETER;
goto abort_egress;
}
if (type == VTPM_TYPE_MIGRATED) {
vtpmlogerror(VTPM_LOG_VTPM, "Attempt to re-attach previously migrated instance %d without recovering first. Ignoring\n", dmi_id);
status = TPM_BAD_PARAMETER;
goto abort_egress;
}
// Initialize the Non-persistent pieces
TPMTRYRETURN( TCS_OpenContext(&new_dmi->TCSContext) );
new_dmi->connected = TRUE;
// Design specific new DMI code.
// Includes: create IPCs, Measuring DMI, and maybe launching DMI
status = VTPM_New_DMI_Extra(new_dmi, startup_mode);
goto egress;
abort_egress:
vtpmlogerror(VTPM_LOG_VTPM, "Failed to create DMI id=%d due to status=%s. Cleaning.\n", dmi_id, tpm_get_error_name(status));
close_dmi(new_dmi );
egress:
return status;
}
TPM_RESULT VTPM_Handle_Close_DMI( const buffer_t *param_buf) {
TPM_RESULT status=TPM_FAIL;
VTPM_DMI_RESOURCE *dmi_res=NULL;
UINT32 dmi_id;
if ((param_buf == NULL) || (buffer_len(param_buf) != sizeof(UINT32)) ) {
vtpmlogerror(VTPM_LOG_VTPM, "Closing DMI has bad size.");
status = TPM_BAD_PARAMETER;
goto abort_egress;
}
BSG_UnpackList( param_buf->bytes, 1,
BSG_TYPE_UINT32, &dmi_id);
vtpmloginfo(VTPM_LOG_VTPM, "Closing DMI %d.\n", dmi_id);
dmi_res = (VTPM_DMI_RESOURCE *) hashtable_search(vtpm_globals->dmi_map, &dmi_id);
if (dmi_res == NULL ) {
vtpmlogerror(VTPM_LOG_VTPM, "Trying to close nonexistent DMI.\n");
status = TPM_BAD_PARAMETER;
goto abort_egress;
}
if (!dmi_res->connected) {
vtpmlogerror(VTPM_LOG_VTPM, "Closing non-connected DMI.\n");
status = TPM_BAD_PARAMETER;
goto abort_egress;
}
// Close Dmi
TPMTRYRETURN(close_dmi( dmi_res ));
status=TPM_SUCCESS;
goto egress;
abort_egress:
egress:
return status;
}
TPM_RESULT VTPM_Handle_Delete_DMI( const buffer_t *param_buf) {
TPM_RESULT status=TPM_FAIL;
VTPM_DMI_RESOURCE *dmi_res=NULL;
UINT32 dmi_id;
if ((param_buf == NULL) || (buffer_len(param_buf) != sizeof(UINT32)) ) {
vtpmlogerror(VTPM_LOG_VTPM, "Closing DMI has bad size.\n");
status = TPM_BAD_PARAMETER;
goto abort_egress;
}
BSG_UnpackList( param_buf->bytes, 1,
BSG_TYPE_UINT32, &dmi_id);
vtpmloginfo(VTPM_LOG_VTPM, "Deleting DMI %d.\n", dmi_id);
dmi_res = (VTPM_DMI_RESOURCE *) hashtable_remove(vtpm_globals->dmi_map, &dmi_id);
if (dmi_res == NULL) {
vtpmlogerror(VTPM_LOG_VTPM, "Closing non-existent DMI.\n");
status = TPM_BAD_PARAMETER;
goto abort_egress;
}
//vtpm scripts delete file dmi_res->NVMLocation for us
// Close DMI first
TPMTRYRETURN(close_dmi( dmi_res ));
free ( dmi_res );
status=TPM_SUCCESS;
goto egress;
abort_egress:
egress:
return status;
}
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