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/*
* Copyright 2018 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// Author: Arun Kumar Sekar
//
#include "tpm_wrapper.h"
#include "util.h"
#include <errno.h>
#define TSSWG_INTEROP 1
#define TSS_SAPI_FIRST_FAMILY 2
#define TSS_SAPI_FIRST_LEVEL 1
#define TSS_SAPI_FIRST_VERSION 108
TSS2_RC swKeyTpmImport(
/* IN */
TSS2_SYS_CONTEXT *sysContext,
TPM2_HANDLE parentKeyHandle,
TPM2B_DATA* encryptionKey, TPM2B_PUBLIC* swKeyPublic, TPM2B_PRIVATE* swKeyPrivate, TPM2B_ENCRYPTED_SECRET* encSymSeed,
unsigned char* tpm_pwd, int tpm_pwd_len,
/* OUT */
TPM2B_PRIVATE *importPrivate)
{
TPM2_RC rval = TPM2_RC_SUCCESS;
TPM2B_NAME name = {sizeof( TPM2B_NAME ) - 2};
TPM2_HANDLE wrapperKeyHandle;
TSS2L_SYS_AUTH_RESPONSE npsessionsDataOut;
if(NULL == tpm_pwd) {
printf("TPM password pinter is NULL \n");
return -1;
}
TSS2L_SYS_AUTH_COMMAND npsessionsData = { .count = 1, .auths = {{
.sessionHandle = TPM2_RS_PW,
.sessionAttributes = 0,
.nonce = {.size = 0},
.hmac = {.size = 0}}}};
npsessionsData.auths[0].hmac.size = tpm_pwd_len;
if(tpm_pwd_len > 0)
{
memcpy(npsessionsData.auths[0].hmac.buffer, tpm_pwd, npsessionsData.auths[0].hmac.size);
}
TPMT_SYM_DEF_OBJECT symmetricAlg;
symmetricAlg.algorithm = TPM2_ALG_AES;
symmetricAlg.keyBits.aes = 128;
symmetricAlg.mode.aes = TPM2_ALG_CFB;
rval = Tss2_Sys_Import( sysContext,
parentKeyHandle,
&npsessionsData,
encryptionKey,
swKeyPublic,
swKeyPrivate,
encSymSeed,
&symmetricAlg,
importPrivate,
&npsessionsDataOut
);
printf("The return value of sys import: 0x%x \n", rval);
#if 0
if(rval == TSS2_RC_SUCCESS)
{
rval = Tss2_Sys_Load (sysContext, parentKeyHandle, &npsessionsData, importPrivate, swKeyPublic,
&wrapperKeyHandle, &name, &npsessionsDataOut);
printf("\n Load Imported Handle: 0x%x | rval 0x%x \n", wrapperKeyHandle, rval);
}
if(rval == TSS2_RC_SUCCESS)
{
rval = Tss2_Sys_FlushContext( sysContext, wrapperKeyHandle);
printf("\n Flush Loaded key Handle : 0x%8.8x| rval 0x%x \n", wrapperKeyHandle, rval);
}
#endif
// Nullify TPM password
memset(tpm_pwd, 0, tpm_pwd_len);
return rval;
}
TSS2_TCTI_CONTEXT* tpm2_tcti_tabrmd_init (void)
{
TSS2_TCTI_CONTEXT *tcti_ctx;
TSS2_RC rc;
size_t size;
rc = Tss2_Tcti_Tabrmd_Init(NULL, &size, NULL);
if (rc != TSS2_RC_SUCCESS) {
printf ("Failed to get size for TABRMD TCTI context: 0x%x", rc);
return NULL;
}
tcti_ctx = (TSS2_TCTI_CONTEXT*)calloc (1, size);
if (tcti_ctx == NULL) {
printf ("Allocation for TABRMD TCTI context failed: %s",
strerror (errno));
return NULL;
}
rc = Tss2_Tcti_Tabrmd_Init (tcti_ctx, &size, NULL);
if (rc != TSS2_RC_SUCCESS) {
printf ("Failed to initialize TABRMD TCTI context: 0x%x", rc);
free (tcti_ctx);
return NULL;
}
return tcti_ctx;
}
TSS2_SYS_CONTEXT* sys_ctx_init (TSS2_TCTI_CONTEXT *tcti_ctx)
{
TSS2_SYS_CONTEXT *sys_ctx;
TSS2_RC rc;
size_t size;
TSS2_ABI_VERSION abi_version = {
.tssCreator = TSSWG_INTEROP,
.tssFamily = TSS_SAPI_FIRST_FAMILY,
.tssLevel = TSS_SAPI_FIRST_LEVEL,
.tssVersion = TSS_SAPI_FIRST_VERSION,
};
size = Tss2_Sys_GetContextSize (0);
sys_ctx = (TSS2_SYS_CONTEXT*)calloc (1, size);
if (sys_ctx == NULL) {
fprintf (stderr,
"Failed to allocate 0x%zx bytes for the SAPI context\n",
size);
return NULL;
}
rc = Tss2_Sys_Initialize (sys_ctx, size, tcti_ctx, &abi_version);
if (rc != TSS2_RC_SUCCESS) {
fprintf (stderr, "Failed to initialize SAPI context: 0x%x\n", rc);
free (sys_ctx);
return NULL;
}
return sys_ctx;
}
TSS2_RC TeardownTctiContext( TSS2_TCTI_CONTEXT *tctiContext )
{
//(tctiContext)->finalize( tctiContext );
//TSS2_TCTI_FINALIZiE(tctiContext);
Tss2_Tcti_Finalize (tctiContext);
free (tctiContext);
tctiContext = NULL;
return TSS2_RC_SUCCESS;
}
void TeardownSysContext( TSS2_SYS_CONTEXT **sysContext )
{
if( *sysContext != 0 ) {
Tss2_Sys_Finalize(*sysContext);
free(*sysContext);
*sysContext = 0;
}
}
/* helper functions */
#if 0
TSS2_RC TPM2ReadPublicPortion(TSS2_SYS_CONTEXT *sysContext, TPM_HANDLE objectHandle, TPM2B_PUBLIC *publicPortion )
{
TPM_RC rval = TPM_RC_SUCCESS;
TPM2B_NAME qualifiedName;
TPM2B_NAME name;
INIT_SIMPLE_TPM2B_SIZE( name );
INIT_SIMPLE_TPM2B_SIZE( qualifiedName );
if(publicPortion == NULL) {
printf("Input reference for TPM2B_PUBLIC structure is NULL");
return TPM_RC_FAILURE;
}
publicPortion->t.size = 0;
rval = Tss2_Sys_ReadPublic( sysContext, objectHandle , 0, publicPortion, &name, &qualifiedName, 0 );
if(rval != TPM_RC_SUCCESS)
{
printf("\n Tss2_Sys_ReadPublic failed: 0x%x ! for TPM handle: 0x%x \n", rval, objectHandle);
}
return rval;
}
#endif
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