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/********************************************************************************/
/* */
/* TSS Primary API */
/* Written by Ken Goldman */
/* IBM Thomas J. Watson Research Center */
/* */
/* (c) Copyright IBM Corporation 2015 - 2018. */
/* */
/* 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 names of the IBM 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 */
/* HOLDER 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 <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
#ifdef TPM_POSIX
#include <netinet/in.h>
#endif
#ifdef TPM_WINDOWS
#include <winsock2.h>
#endif
#include <ibmtss/tss.h>
#include "tssproperties.h"
#include <ibmtss/tsstransmit.h>
#include <ibmtss/tssutils.h>
#include <ibmtss/tssresponsecode.h>
#include <ibmtss/tssmarshal.h>
#include <ibmtss/Unmarshal_fp.h>
#ifndef TPM_TSS_NOCRYPTO
#include <ibmtss/tsscrypto.h>
#include <ibmtss/tsscryptoh.h>
#endif
#include <ibmtss/tssprintcmd.h>
#ifdef TPM_TPM20
#include "tss20.h"
#endif
#ifdef TPM_TPM12
#include "tss12.h"
#endif
/* local prototypes */
static TPM_RC TSS_Context_Init(TSS_CONTEXT *tssContext);
extern int tssVerbose;
extern int tssVverbose;
extern int tssFirstCall;
/* TSS_Create() creates and initializes the TSS Context. It does NOT open a connection to the
TPM.*/
TPM_RC TSS_Create(TSS_CONTEXT **tssContext)
{
TPM_RC rc = 0;
/* allocate the high level TSS structure */
if (rc == 0) {
/* set to NULL for backward compatibility, caller may not have set tssContext to NULL before
the call */
*tssContext = NULL;
rc = TSS_Malloc((unsigned char **)tssContext, sizeof(TSS_CONTEXT));
}
/* initialize the high level TSS structure */
if (rc == 0) {
rc = TSS_Context_Init(*tssContext);
/* the likely cause of a failure is a bad environment variable */
if (rc != 0) {
if (tssVerbose) printf("TSS_Create: TSS_Context_Init() failed\n");
free(*tssContext);
*tssContext = NULL;
}
}
/* allocate and initialize the lower layer TSS context */
if (rc == 0) {
rc = TSS_AuthCreate(&((*tssContext)->tssAuthContext));
}
return rc;
}
/* TSS_Context_Init() on first call is used for any global library initialization.
On every call, it initializes the TSS context.
*/
static TPM_RC TSS_Context_Init(TSS_CONTEXT *tssContext)
{
TPM_RC rc = 0;
#ifndef TPM_TSS_NOCRYPTO
#ifndef TPM_TSS_NOFILE
size_t tssSessionEncKeySize;
size_t tssSessionDecKeySize;
#endif
#endif
/* at the first call to the TSS, initialize global variables */
if (tssFirstCall) { /* tssFirstCall is a library global */
#ifndef TPM_TSS_NOCRYPTO
/* crypto module initializations, crypto library specific */
if (rc == 0) {
rc = TSS_Crypto_Init();
}
#endif
/* TSS properties that are global, not per TSS context */
if (rc == 0) {
rc = TSS_GlobalProperties_Init();
}
tssFirstCall = FALSE;
}
/* TSS properties that are per context */
if (rc == 0) {
rc = TSS_Properties_Init(tssContext);
}
#ifndef TPM_TSS_NOCRYPTO
#ifndef TPM_TSS_NOFILE
/* crypto library dependent code to allocate the session state encryption and decryption keys.
They are probably always the same size, but it's safer not to assume that. */
if (rc == 0) {
rc = TSS_AES_GetEncKeySize(&tssSessionEncKeySize);
}
if (rc == 0) {
rc = TSS_AES_GetDecKeySize(&tssSessionDecKeySize);
}
if (rc == 0) {
rc = TSS_Malloc((uint8_t **)&tssContext->tssSessionEncKey, tssSessionEncKeySize);
}
if (rc == 0) {
rc = TSS_Malloc((uint8_t **)&tssContext->tssSessionDecKey, tssSessionDecKeySize);
}
/* build the session encryption and decryption keys */
if (rc == 0) {
rc = TSS_AES_KeyGenerate(tssContext->tssSessionEncKey,
tssContext->tssSessionDecKey);
}
#endif
#endif
return rc;
}
/* TSS_Delete() closes an open TPM connection, then free the TSS context memory.
*/
TPM_RC TSS_Delete(TSS_CONTEXT *tssContext)
{
TPM_RC rc = 0;
if (tssContext != NULL) {
TSS_AuthDelete(tssContext->tssAuthContext);
#ifdef TPM_TSS_NOFILE
{
size_t i;
for (i = 0 ; i < (sizeof(tssContext->sessions) / sizeof(TSS_SESSIONS)) ; i++) {
tssContext->sessions[i].sessionHandle = TPM_RH_NULL;
/* erase any secrets */
memset(tssContext->sessions[i].sessionData,
0, tssContext->sessions[i].sessionDataLength);
free(tssContext->sessions[i].sessionData);
tssContext->sessions[i].sessionData = NULL;
tssContext->sessions[i].sessionDataLength = 0;
}
}
#endif
#ifndef TPM_TSS_NOCRYPTO
#ifndef TPM_TSS_NOFILE
free(tssContext->tssSessionEncKey);
free(tssContext->tssSessionDecKey);
#endif
#endif
rc = TSS_Close(tssContext);
free(tssContext);
}
return rc;
}
/* TSS_Execute() performs the complete command / response process.
It sends the command specified by commandCode and the parameters 'in', returning the response
parameters 'out'.
... varargs are
TPMI_SH_AUTH_SESSION sessionHandle,
const char *password,
unsigned int sessionAttributes
Terminates with TPM_RH_NULL, NULL, 0
Processes up to MAX_SESSION_NUM sessions.
*/
TPM_RC TSS_Execute(TSS_CONTEXT *tssContext,
RESPONSE_PARAMETERS *out,
COMMAND_PARAMETERS *in,
EXTRA_PARAMETERS *extra,
TPM_CC commandCode,
...)
{
TPM_RC rc = 0;
va_list ap;
int tpm20Command;
int tpm12Command;
if (rc == 0) {
tpm20Command = (((commandCode >= TPM_CC_FIRST) && (commandCode <=TPM_CC_LAST)) || /* base */
((commandCode >= 0x20000000) && (commandCode <= 0x2000ffff))); /* vendor */
tpm12Command = ((commandCode <= 0x000000ff) || /* base */
((commandCode >= 0x40000000) && (commandCode <= 0x4000ffff))); /* TSC */
if (!tpm20Command && !tpm12Command) {
if (tssVerbose) printf("TSS_Execute: commandCode %08x unsupported\n",
commandCode);
rc = TSS_RC_COMMAND_UNIMPLEMENTED;
}
if (tpm20Command && tpm12Command) {
if (tssVerbose) printf("TSS_Execute: commandCode %08x is both TPM 1.2 and TPM 2.0\n",
commandCode);
rc = TSS_RC_FAIL;
}
}
if (rc == 0) {
va_start(ap, commandCode);
if (tpm20Command) {
#ifdef TPM_TPM20
tssContext->tpm12Command = FALSE;
rc = TSS_Execute20(tssContext,
out,
in,
(EXTRA_PARAMETERS *)extra,
commandCode,
ap);
#else
if (tssVerbose) printf("TSS_Execute: commandCode is TPM 1.2, TSS is TPM 2.0 only\n");
rc = TSS_RC_COMMAND_UNIMPLEMENTED;
#endif
}
if (tpm12Command) {
#ifdef TPM_TPM12
tssContext->tpm12Command = TRUE;
rc = TSS_Execute12(tssContext,
out,
in,
(EXTRA12_PARAMETERS *)extra,
commandCode,
ap);
#else
if (tssVerbose) printf("TSS_Execute: commandCode is TPM 2.0, TSS is TPM 1.2 only\n");
rc = TSS_RC_COMMAND_UNIMPLEMENTED;
#endif
}
va_end(ap);
}
return rc;
}
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