aboutsummaryrefslogtreecommitdiffstats
path: root/googlemock/docs/ForDummies.md
diff options
context:
space:
mode:
Diffstat (limited to 'googlemock/docs/ForDummies.md')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-20 22:25:39 +0000
a id='n52' href='#n52'>52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 
// ===================================================================
// 
// 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.
// ===================================================================
// 
// vtpm_manager_if.c
// 
//  Provides functions to call local vtpm manager interface (Hotplug)
//
// ==================================================================

#include <stdio.h>
#include <fcntl.h>
#include <malloc.h>
#include <string.h>

#include "tcg.h"
#include "buffer.h"
#include "log.h"
#include "vtpm_ipc.h"
#include "bsg.h"
#include "vtpm_migrator.h"
#include "vtpm_manager.h"

#define VTPM_TX_HP_FNAME       "/var/vtpm/fifos/from_console.fifo"
#define VTPM_RX_HP_FNAME       "/var/vtpm/fifos/to_console.fifo"

static vtpm_ipc_handle_t tx_ipc_h, rx_ipc_h;

TPM_RESULT vtpm_manager_open(){

  if ( (vtpm_ipc_init(&tx_ipc_h,  VTPM_TX_HP_FNAME, O_RDWR, TRUE) != 0) ||  //FIXME: wronly
       (vtpm_ipc_init(&rx_ipc_h,  VTPM_RX_HP_FNAME, O_RDWR, TRUE) != 0) ) { //FIXME: rdonly
    vtpmlogerror(VTPM_LOG_VTPM, "Unable to connect to vtpm_manager.\n");
    return TPM_IOERROR;
  } 

  return TPM_SUCCESS;
}

void vtpm_manager_close() {

  vtpm_ipc_close(&tx_ipc_h);
  vtpm_ipc_close(&rx_ipc_h);
}


TPM_RESULT vtpm_manager_command(TPM_COMMAND_CODE ord,
                                buffer_t *command_param_buf,
                                TPM_RESULT *cmd_status, /* out */
                                buffer_t *result_param_buf) {

  TPM_RESULT status = TPM_FAIL;
  int  size_read, size_write, i;
  BYTE *adj_command, response_header[VTPM_COMMAND_HEADER_SIZE_SRV];
  UINT32 dmi_id=0, adj_command_size, out_param_size, adj_param_size;
  TPM_TAG tag=VTPM_TAG_REQ;

  if ( (!command_param_buf) || (!result_param_buf) || (!cmd_status) ) {
    status = TPM_BAD_PARAMETER;
    goto abort_egress;
  }   
  
  adj_command_size = VTPM_COMMAND_HEADER_SIZE_SRV + buffer_len(command_param_buf);
  adj_command = (BYTE *) malloc( adj_command_size );
  if (!adj_command) {
    status = TPM_RESOURCES;
    goto abort_egress;
  }

  out_param_size = VTPM_COMMAND_HEADER_SIZE + buffer_len(command_param_buf);
  BSG_PackList(adj_command, 4,
                 BSG_TYPE_UINT32, &dmi_id,
                 BSG_TPM_TAG, &tag,
                 BSG_TYPE_UINT32, &out_param_size,
                 BSG_TPM_COMMAND_CODE, &ord );

  memcpy(adj_command + VTPM_COMMAND_HEADER_SIZE_SRV, command_param_buf->bytes, buffer_len(command_param_buf));

  size_write = vtpm_ipc_write(&tx_ipc_h, NULL, adj_command, adj_command_size);

  if (size_write > 0) {
    vtpmloginfo(VTPM_LOG_VTPM_DEEP, "SENT (MGR): 0x");
    for (i=0; i< adj_command_size; i++) {
      vtpmloginfomore(VTPM_LOG_VTPM_DEEP, "%x ", adj_command[i]);
    }
    vtpmloginfomore(VTPM_LOG_VTPM_DEEP, "\n");
  } else {
    vtpmlogerror(VTPM_LOG_VTPM, "Error writing VTPM Manager console.\n");
    status = TPM_IOERROR;
    goto abort_egress;
  }

  if (size_write != (int) adj_command_size )
    vtpmlogerror(VTPM_LOG_VTPM, "Could not write entire command to mgr (%d/%d)\n", size_write, adj_command_size);

  // Read header for response to manager command
  size_read = vtpm_ipc_read(&rx_ipc_h, NULL, response_header, VTPM_COMMAND_HEADER_SIZE_SRV);
  if (size_read > 0) {
    vtpmloginfo(VTPM_LOG_VTPM_DEEP, "RECV (MGR): 0x");
    for (i=0; i<size_read; i++)
      vtpmloginfomore(VTPM_LOG_VTPM_DEEP, "%x ", response_header[i]);

  } else {
    vtpmlogerror(VTPM_LOG_VTPM, "Error reading from vtpm manager.\n");
    status = TPM_IOERROR;
    goto abort_egress;
  }

  if (size_read < (int) VTPM_COMMAND_HEADER_SIZE_SRV) {
    vtpmlogerror(VTPM_LOG_VTPM, "Command from vtpm_manager shorter than std header.\n");
    status = TPM_IOERROR;
    goto abort_egress;
  }

  // Unpack response from DMI for TPM command
  BSG_UnpackList(response_header, 4,
                 BSG_TYPE_UINT32, &dmi_id,
                 BSG_TPM_TAG, &tag,
                 BSG_TYPE_UINT32, &out_param_size,
                 BSG_TPM_COMMAND_CODE, cmd_status );

  // If response has parameters, read them.
  // Note that out_param_size is in the client's context
  adj_param_size = out_param_size - VTPM_COMMAND_HEADER_SIZE;
  if (adj_param_size > 0) {
    TPMTRYRETURN( buffer_init( result_param_buf, adj_param_size, NULL) );
    size_read = vtpm_ipc_read(&rx_ipc_h, NULL, result_param_buf->bytes, adj_param_size);
    if (size_read > 0) {
      for (i=0; i< size_read; i++)
        vtpmloginfomore(VTPM_LOG_VTPM_DEEP, "%x ", result_param_buf->bytes[i]);

    } else {
      vtpmlogerror(VTPM_LOG_VTPM, "Error reading from vtpm manager.\n");
      goto abort_egress;
    }
    vtpmloginfomore(VTPM_LOG_VTPM, "\n");

    if (size_read < (int)adj_param_size) {
      vtpmloginfomore(VTPM_LOG_VTPM, "\n");
      vtpmlogerror(VTPM_LOG_VTPM, "Command read(%d) is shorter than header indicates(%d).\n", size_read, adj_param_size);
      status = TPM_IOERROR;
      goto abort_egress;
    }
  } else {
    vtpmloginfomore(VTPM_LOG_VTPM, "\n");
  }

  status=TPM_SUCCESS;
  goto egress;

 abort_egress:
 egress:

  return status;
}