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/* SPDX-License-Identifier: BSD-2 */
/*******************************************************************************
* Copyright 2017-2018, Fraunhofer SIT sponsored by Infineon Technologies AG
* All rights reserved.
*******************************************************************************/
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <inttypes.h>
#ifndef NO_DL
#include <dlfcn.h>
#endif /* NO_DL */
#include "tss2_tcti.h"
#include "tss2_tcti_mssim.h"
#ifdef _WIN32
#include "tss2_tcti_tbs.h"
#else /* _WIN32 */
#include "tss2_tcti_device.h"
#endif /* else */
#define LOGMODULE esys
#include "util/log.h"
#define ARRAY_SIZE(X) (sizeof(X)/sizeof(X[0]))
struct {
#ifndef NO_DL
char *file;
#endif /* NO_DL */
TSS2_TCTI_INIT_FUNC init;
char *conf;
char *description;
} tctis[] = {
#ifndef NO_DL
{ "libtss2-tcti-default.so", NULL, NULL, "Access libtss2-tcti-default.so" },
{ "libtss2-tcti-tabrmd.so", NULL, "", "Access libtss2-tcti-tabrmd.so" },
#endif /* NO_DL */
#ifdef _WIN32
{ .init = Tss2_Tcti_Tbs_Init, .conf = "",
.description = "Access to TBS" },
#else /* _WIN32 */
#ifdef TCTI_DEVICE
{ .init = Tss2_Tcti_Device_Init, .conf = "/dev/tpmrm0",
.description = "Access to /dev/tpmrm0" },
{ .init = Tss2_Tcti_Device_Init, .conf = "/dev/tpm0",
.description = "Access to /dev/tpm0" },
#endif
#endif /* else */
#ifdef TCTI_MSSIM
{ .init = Tss2_Tcti_Mssim_Init, .conf = "host=localhost,port=2321",
.description = "Access to Mssim-simulator for tcp://localhost:2321" },
#endif /* TCTI_MSSIM */
};
static TSS2_RC
tcti_from_init(TSS2_TCTI_INIT_FUNC init,
const char* conf,
TSS2_TCTI_CONTEXT **tcti)
{
TSS2_RC r;
size_t size;
LOG_TRACE("Initializing TCTI for config: %s", conf);
r = init(NULL, &size, conf);
if (r != TSS2_RC_SUCCESS) {
LOG_WARNING("TCTI init for function %p failed with %" PRIx32, init, r);
return r;
}
*tcti = (TSS2_TCTI_CONTEXT *) calloc(1, size);
if (*tcti == NULL) {
LOG_ERROR("Memory allocation for tcti failed: %s", strerror(errno));
return TSS2_ESYS_RC_MEMORY;
}
r = init(*tcti, &size, conf);
if (r != TSS2_RC_SUCCESS) {
LOG_WARNING("TCTI init for function %p failed with %" PRIx32, init, r);
free(*tcti);
*tcti=NULL;
return r;
}
LOG_DEBUG("Initialized TCTI for config: %s", conf);
return TSS2_RC_SUCCESS;
}
static TSS2_RC
tcti_from_info(TSS2_TCTI_INFO_FUNC infof,
const char* conf,
TSS2_TCTI_CONTEXT **tcti)
{
TSS2_RC r;
LOG_TRACE("Attempting to load TCTI info");
const TSS2_TCTI_INFO* info = infof();
if (info == NULL) {
LOG_ERROR("TCTI info function failed");
return TSS2_ESYS_RC_GENERAL_FAILURE;
}
LOG_TRACE("Loaded TCTI info named: %s", info->name);
LOG_TRACE("TCTI description: %s", info->description);
LOG_TRACE("TCTI config_help: %s", info->config_help);
r = tcti_from_init(info->init, conf, tcti);
if (r != TSS2_RC_SUCCESS) {
LOG_WARNING("Could not initialize TCTI named: %s", info->name);
return r;
}
LOG_DEBUG("Initialized TCTI named: %s", info->name);
return TSS2_RC_SUCCESS;
}
#ifndef NO_DL
static TSS2_RC
tcti_from_file(const char *file,
const char* conf,
TSS2_TCTI_CONTEXT **tcti,
void **dlhandle)
{
TSS2_RC r;
void *handle;
TSS2_TCTI_INFO_FUNC infof;
LOG_TRACE("Attempting to load TCTI file: %s", file);
handle = dlopen(file, RTLD_NOW);
if (handle == NULL) {
LOG_WARNING("Could not load TCTI file: %s", file);
return TSS2_ESYS_RC_BAD_REFERENCE;
}
infof = (TSS2_TCTI_INFO_FUNC) dlsym(handle, TSS2_TCTI_INFO_SYMBOL);
if (infof == NULL) {
LOG_ERROR("Info not found in TCTI file: %s", file);
dlclose(handle);
return TSS2_ESYS_RC_BAD_REFERENCE;
}
r = tcti_from_info(infof, conf, tcti);
if (r != TSS2_RC_SUCCESS) {
LOG_ERROR("Could not initialize TCTI file: %s", file);
dlclose(handle);
return r;
}
if (dlhandle)
*dlhandle = handle;
LOG_DEBUG("Initialized TCTI file: %s", file);
return TSS2_RC_SUCCESS;
}
#endif /* NO_DL */
TSS2_RC
get_tcti_default(TSS2_TCTI_CONTEXT ** tcticontext, void **dlhandle)
{
if (tcticontext == NULL) {
LOG_ERROR("tcticontext must not be NULL");
return TSS2_TCTI_RC_BAD_REFERENCE;
}
*tcticontext = NULL;
#ifdef ESYS_TCTI_DEFAULT_MODULE
#ifdef ESYS_TCTI_DEFAULT_CONFIG
const char *config = ESYS_TCTI_DEFAULT_CONFIG;
#else /* ESYS_TCTI_DEFAULT_CONFIG */
const char *config = NULL;
#endif /* ESYS_TCTI_DEFAULT_CONFIG */
LOG_DEBUG("Attempting to initialize TCTI defined during compilation: %s:%s",
ESYS_TCTI_DEFAULT_MODULE, config);
return tcti_from_file(ESYS_TCTI_DEFAULT_MODULE, config, tcticontext,
dlhandle);
#else /* ESYS_TCTI_DEFAULT_MODULE */
TSS2_RC r;
for (size_t i = 0; i < ARRAY_SIZE(tctis); i++) {
LOG_DEBUG("Attempting to connect using standard TCTI: %s",
tctis[i].description);
if (tctis[i].init != NULL) {
r = tcti_from_init(tctis[i].init, tctis[i].conf, tcticontext);
if (r == TSS2_RC_SUCCESS)
return TSS2_RC_SUCCESS;
LOG_DEBUG("Failed to load standard TCTI number %zu", i);
#ifndef NO_DL
} else if (tctis[i].file != NULL) {
r = tcti_from_file(tctis[i].file, tctis[i].conf, tcticontext,
dlhandle);
if (r == TSS2_RC_SUCCESS)
return TSS2_RC_SUCCESS;
LOG_DEBUG("Failed to load standard TCTI number %zu", i);
#endif /* NO_DL */
} else {
LOG_ERROR("Erroneous entry in standard TCTIs");
return TSS2_ESYS_RC_GENERAL_FAILURE;
}
}
LOG_ERROR("No standard TCTI could be loaded");
return TSS2_ESYS_RC_NOT_IMPLEMENTED;
#endif /* ESYS_TCTI_DEFAULT_MODULE */
}
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