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/*
* Licensed Materials - Property of IBM
*
* trousers - An open source TCG Software Stack
*
* (C) Copyright International Business Machines Corp. 2004-2007
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "trousers/tss.h"
#include "trousers/trousers.h"
#include "trousers_types.h"
#include "spi_utils.h"
#include "capabilities.h"
#include "tsplog.h"
#include "obj.h"
TSS_RESULT
Tspi_Hash_TickStampBlob(TSS_HHASH hHash, /* in */
TSS_HKEY hIdentKey, /* in */
TSS_VALIDATION* pValidationData) /* in */
{
TSS_RESULT result;
TSS_HCONTEXT tspContext;
TCS_KEY_HANDLE tcsKey;
TSS_HPOLICY hPolicy;
TPM_DIGEST digest;
TSS_BOOL usesAuth;
TPM_AUTH auth, *pAuth;
UINT32 hashLen, sigLen, tcLen, signInfoLen;
BYTE *hash, *sig, *tc, *signInfo = NULL;
UINT64 offset;
Trspi_HashCtx hashCtx;
if (pValidationData == NULL)
return TSPERR(TSS_E_BAD_PARAMETER);
if ((result = obj_hash_get_tsp_context(hHash, &tspContext)))
return result;
if (pValidationData->ulExternalDataLength != sizeof(TPM_NONCE))
return TSPERR(TSS_E_BAD_PARAMETER);
if ((result = obj_hash_get_value(hHash, &hashLen, &hash)))
return result;
if (hashLen != sizeof(TPM_DIGEST)) {
free_tspi(tspContext, hash);
return TSPERR(TSS_E_HASH_INVALID_LENGTH);
}
if ((result = obj_rsakey_get_policy(hIdentKey, TSS_POLICY_USAGE, &hPolicy, &usesAuth)))
return result;
if ((result = obj_rsakey_get_tcs_handle(hIdentKey, &tcsKey)))
return result;
if (usesAuth) {
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_TickStampBlob);
result |= Trspi_HashUpdate(&hashCtx, sizeof(TPM_NONCE),
pValidationData->rgbExternalData);
result |= Trspi_HashUpdate(&hashCtx, sizeof(TPM_DIGEST), hash);
if ((result |= Trspi_HashFinal(&hashCtx, digest.digest))) {
free_tspi(tspContext, hash);
return result;
}
if ((result = secret_PerformAuth_OIAP(hIdentKey, TPM_ORD_TickStampBlob, hPolicy,
FALSE, &digest, &auth))) {
free_tspi(tspContext, hash);
return result;
}
pAuth = &auth;
} else
pAuth = NULL;
if ((result = TCS_API(tspContext)->TickStampBlob(tspContext, tcsKey,
(TPM_NONCE *)pValidationData->rgbExternalData,
(TPM_DIGEST *)hash, pAuth, &sigLen, &sig, &tcLen,
&tc))) {
free_tspi(tspContext, hash);
return result;
}
if (usesAuth) {
result = Trspi_HashInit(&hashCtx, TSS_HASH_SHA1);
result |= Trspi_Hash_UINT32(&hashCtx, result);
result |= Trspi_Hash_UINT32(&hashCtx, TPM_ORD_TickStampBlob);
result |= Trspi_HashUpdate(&hashCtx, tcLen, tc);
result |= Trspi_Hash_UINT32(&hashCtx, sigLen);
result |= Trspi_HashUpdate(&hashCtx, sigLen, sig);
if ((result |= Trspi_HashFinal(&hashCtx, digest.digest))) {
free_tspi(tspContext, hash);
free(sig);
free(tc);
return result;
}
if ((result = obj_policy_validate_auth_oiap(hPolicy, &digest, pAuth))) {
free_tspi(tspContext, hash);
free(sig);
free(tc);
return result;
}
}
/* tag fixed replay length(Data) Data */
signInfoLen = sizeof(UINT16) + 4 + sizeof(TPM_NONCE) + sizeof(UINT32) + sizeof(TPM_DIGEST) + tcLen;
if ((signInfo = calloc_tspi(tspContext, signInfoLen)) == NULL) {
free_tspi(tspContext, hash);
free(sig);
free(tc);
return TSPERR(TSS_E_INTERNAL_ERROR);
}
offset = 0;
Trspi_LoadBlob_UINT16(&offset, TPM_TAG_SIGNINFO, signInfo);
Trspi_LoadBlob_BYTE(&offset, 'T', signInfo);
Trspi_LoadBlob_BYTE(&offset, 'S', signInfo);
Trspi_LoadBlob_BYTE(&offset, 'T', signInfo);
Trspi_LoadBlob_BYTE(&offset, 'P', signInfo);
Trspi_LoadBlob(&offset, sizeof(TPM_NONCE), signInfo, pValidationData->rgbExternalData);
Trspi_LoadBlob_UINT32(&offset, sizeof(TPM_DIGEST) + tcLen, signInfo);
Trspi_LoadBlob(&offset, sizeof(TPM_DIGEST), signInfo, hash);
Trspi_LoadBlob(&offset, (size_t)tcLen, signInfo, tc);
free(tc);
free_tspi(tspContext, hash);
pValidationData->rgbData = signInfo;
pValidationData->ulDataLength = signInfoLen;
/* tag sig so that it can be free'd by the app through Tspi_Context_FreeMemory */
if ((result = __tspi_add_mem_entry(tspContext, sig))) {
free_tspi(tspContext, signInfo);
free(sig);
return result;
}
pValidationData->rgbValidationData = sig;
pValidationData->ulValidationDataLength = sigLen;
return TSS_SUCCESS;
}
TSS_RESULT
Tspi_TPM_ReadCurrentTicks(TSS_HTPM hTPM, /* in */
TPM_CURRENT_TICKS* tickCount) /* out */
{
TSS_RESULT result;
TSS_HCONTEXT tspContext;
UINT32 tcLen;
BYTE *tc;
UINT64 offset;
if (tickCount == NULL)
return TSPERR(TSS_E_BAD_PARAMETER);
if ((result = obj_tpm_get_tsp_context(hTPM, &tspContext)))
return result;
if ((result = TCS_API(tspContext)->ReadCurrentTicks(tspContext, &tcLen, &tc)))
return result;
offset = 0;
Trspi_UnloadBlob_CURRENT_TICKS(&offset, tc, tickCount);
free(tc);
return result;
}
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