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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.
// ===================================================================
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include "tcg.h"
#include "buffer.h"
#include "log.h"
#include "tpmddl.h"
// flag to track whether TDDL has been opened
static int g_TDDL_open = 0;
static int g_tx_fd = -1; // the fd to the TPM
#ifndef DUMMY_TPM
#define TPM_TX_FNAME "/dev/tpm0"
static int *g_rx_fdp = &g_tx_fd;
#else
#define TPM_TX_FNAME "/var/tpm/tpm_in.fifo"
#define TPM_RX_FNAME "/var/tpm/tpm_out.fifo"
static int g_rx_fd = -1;
static int *g_rx_fdp = &g_rx_fd; // the fd to the TPM
#endif
TPM_RESULT
TDDL_TransmitData( TDDL_BYTE* in,
TDDL_UINT32 insize,
TDDL_BYTE* out,
TDDL_UINT32* outsize) {
TPM_RESULT status = TPM_SUCCESS;
TDDL_UINT32 i;
vtpmloginfo(VTPM_LOG_TXDATA, "Sending buffer = 0x");
for(i = 0 ; i < insize ; i++)
vtpmloginfomore(VTPM_LOG_TXDATA, "%2.2x ", in[i]);
vtpmloginfomore(VTPM_LOG_TXDATA, "\n");
ssize_t size = 0;
// send the request
size = write (g_tx_fd, in, insize);
if (size < 0) {
vtpmlogerror(VTPM_LOG_TXDATA, "write() failed");
ERRORDIE (TPM_IOERROR);
}
else if ((TDDL_UINT32) size < insize) {
vtpmlogerror(VTPM_LOG_TXDATA, "Wrote %d instead of %d bytes!\n", (int) size, insize);
// ... ?
}
// read the response
size = read (*g_rx_fdp, out, TCPA_MAX_BUFFER_LENGTH);
if (size < 0) {
vtpmlogerror(VTPM_LOG_TXDATA, "read() failed");
ERRORDIE (TPM_IOERROR);
}
vtpmloginfo(VTPM_LOG_TXDATA, "Receiving buffer = 0x");
for(i = 0 ; i < size ; i++)
vtpmloginfomore(VTPM_LOG_TXDATA, "%2.2x ", out[i]);
vtpmloginfomore(VTPM_LOG_TXDATA, "\n");
*outsize = size;
// close connection
goto egress;
abort_egress:
egress:
return status;
}
TPM_RESULT TDDL_Open() {
TDDL_RESULT status = TDDL_SUCCESS;
if (g_TDDL_open)
return TPM_FAIL;
#ifdef DUMMY_TPM
*g_rx_fdp = open (TPM_RX_FNAME, O_RDWR);
#endif
g_tx_fd = open (TPM_TX_FNAME, O_RDWR);
if (g_tx_fd < 0) {
vtpmlogerror(VTPM_LOG_TXDATA, "TPM open failed");
return TPM_IOERROR;
}
g_TDDL_open = 1;
return status;
}
void TDDL_Close() {
if (! g_TDDL_open)
return;
if (g_tx_fd>= 0) {
if (close(g_tx_fd) < 0)
vtpmlogerror(VTPM_LOG_TXDATA, "closeing tpm failed");
g_tx_fd = -1;
}
if (*g_rx_fdp>= 0) {
if (close(*g_rx_fdp) < 0)
vtpmlogerror(VTPM_LOG_TXDATA, "closeing tpm failed");
*g_rx_fdp = -1;
}
g_TDDL_open = 0;
}
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